Feeder idler base plate
Publish: 2021-05-18 00:36:46
1. The main solutions are as follows:
in order to ensure the measurement accuracy, the weighing device of belt feeder can be designed as a device integrating weighing and online weight calibration. The combination of less weights and the materials on the original conveyor belt is used to replace the calibration of multiple materials or weights. It is easy to realize the online and convenient calibration of the measuring accuracy of the belt scale. The cost of the calibration equipment is low, and the calibration does not affect the normal operation, so as to ensure the measuring accuracy of the belt scale. The weighing device of belt feeder includes the first belt scale frame, buffer idler group, weight, weight bin, the second belt scale frame, weight collection bracket, starting point detector, weighing control instrument and speed detector, which realizes the weighing of the materials transported by the feeder and online less weight calibration of weighing accuracy
in the process of conveying materials, the weighing control instrument detects the starting point of belt calibration through the starting point detector, and the weighing control instrument outputs a signal to control the weight bin to release the weight. At this time, the first belt scale measures the accumulated amount of transported materials, and the second belt scale measures the sum of the accumulated amount of transported materials and the standard weight put down by the weight bin, Based on the fact that the accumulated amount of the transported materials passing through the first belt scale and the second belt scale is the same, the weighing control instrument removes the accumulated weight value weighed by the second belt scale from the accumulated weight value weighed by the first belt scale to obtain the standard weight value released by the weight bin, The actual weighing weight value is compared with the standard weight value obtained from the internal counting of the weighing control instrument, and the range coefficient of the weighing control instrument is corrected to make it display the standard weight value. The timing comparison and correction make the measuring accuracy of the belt scale reach high precision and high stability. At this time, there are materials on the whole belt feeder, and the calibration condition is close to the normal conveying condition. Online less weight calibration is used instead of multi material or multi weight calibration
in order to achieve online calibration with few weights instead of multiple materials or weights, the uneven thickness of belt is the main factor affecting the calibration accuracy; In order to rece the influence of the uneven thickness of the belt itself on the online calibration accuracy of the few weights, before the belt conveyor conveys materials, the weighing control instrument establishes the calibration starting point of the belt weight through the starting point detector, so as to automatically zero the belt weight which is larger than the belt moving length of the standard weights released by the weight bin within the conveying time, Ensure that the weight of the belt is zero within the length of the belt when the weighing control instrument calibrates the amount of material transported. The weighing device of belt feeder adopts starting point detector, two belt scales and a weight bin, and uses a weighing control instrument to realize on-line less weight instead of more materials or more weights for belt scale comparison and calibration, so as to realize high-precision weighing<
specific implementation mode
the weighing device of the belt feeder includes a first belt scale frame, a buffer idler group, a weight bin, a second belt scale frame, a weight collection bracket, a starting point detector, a weighing control instrument, a speedometer, a weight and a feeder frame. The first belt scale frame and the second belt scale frame are installed on the feeder, which are located between the lower belt of the feeder and the upper belt of the feeder. A buffer idler group is installed between the first belt scale frame and the second belt scale frame. A weight bin is set above the buffer idler group. There are weights in the weight bin. The weight bin is connected with the feeder, and the weight collection bracket is connected with the head of the feeder, The starting point detector and speed detector are installed on the feeder. The weighing control instrument is connected with the first belt scale frame, the second belt scale frame, the starting point detector and the speedometer through a cable
when the feeder transports materials, weights are pre placed in the weight bin on the feeder. The weighing control instrument detects the starting point of belt calibration through the starting point detector. The weighing control instrument outputs a signal to control the weight bin to release the weights and put them on the materials on the belt on the conveyor. The weights run with the materials, When it reaches the feeder head, it runs to the weight collection bracket; At this time, the first belt weigher measures the cumulative weight of the transported materials, and the second belt weigher measures the sum of the cumulative weight of the transported materials and the weight of the weights released from the weight bin, based on the fact that the first belt weigher and the second belt weigher pass through the same amount of transported materials, The weighing control instrument removes the accumulated weight value of the second belt scale from the accumulated weight value of the first belt scale, and obtains the actual weighing value of the weight released from the weight bin. The actual weighing weight value is compared with the weight value of the standard weight obtained from the internal counting of the weighing control instrument, and the correction coefficient is obtained, According to the correction coefficient, the range coefficient of weighing control instrument is corrected to make it display the weight value of standard material, and the belt scale measurement accuracy is high precision and high stability by comparing and correcting regularly. At this time, the whole length of the belt feeder is covered with materials, and the calibration condition is close to the normal conveying condition. Online less weight calibration is used instead of multi material or multi weight calibration
the uneven thickness of the belt of the belt feeder is the main factor that affects the use of online less weight calibration instead of multi material or multi weight calibration. In order to rece the impact of uneven thickness of the belt on the accuracy of online calibration of less weight, the starting point of belt self weight calibration is established by the weighing control instrument through the starting point detector before the belt conveyor conveys materials, This calibration starting point is used to automatically zero the weight of the belt which is larger than the moving length of the belt in the conveying time of the weights released by the conveying weight bin, so as to ensure that the weight of the belt in this section of the belt length is zero when the weighing control instrument calibrates the conveying material quantity, so as to ensure the accuracy of less materials replacing more materials or multi weights calibration.
in order to ensure the measurement accuracy, the weighing device of belt feeder can be designed as a device integrating weighing and online weight calibration. The combination of less weights and the materials on the original conveyor belt is used to replace the calibration of multiple materials or weights. It is easy to realize the online and convenient calibration of the measuring accuracy of the belt scale. The cost of the calibration equipment is low, and the calibration does not affect the normal operation, so as to ensure the measuring accuracy of the belt scale. The weighing device of belt feeder includes the first belt scale frame, buffer idler group, weight, weight bin, the second belt scale frame, weight collection bracket, starting point detector, weighing control instrument and speed detector, which realizes the weighing of the materials transported by the feeder and online less weight calibration of weighing accuracy
in the process of conveying materials, the weighing control instrument detects the starting point of belt calibration through the starting point detector, and the weighing control instrument outputs a signal to control the weight bin to release the weight. At this time, the first belt scale measures the accumulated amount of transported materials, and the second belt scale measures the sum of the accumulated amount of transported materials and the standard weight put down by the weight bin, Based on the fact that the accumulated amount of the transported materials passing through the first belt scale and the second belt scale is the same, the weighing control instrument removes the accumulated weight value weighed by the second belt scale from the accumulated weight value weighed by the first belt scale to obtain the standard weight value released by the weight bin, The actual weighing weight value is compared with the standard weight value obtained from the internal counting of the weighing control instrument, and the range coefficient of the weighing control instrument is corrected to make it display the standard weight value. The timing comparison and correction make the measuring accuracy of the belt scale reach high precision and high stability. At this time, there are materials on the whole belt feeder, and the calibration condition is close to the normal conveying condition. Online less weight calibration is used instead of multi material or multi weight calibration
in order to achieve online calibration with few weights instead of multiple materials or weights, the uneven thickness of belt is the main factor affecting the calibration accuracy; In order to rece the influence of the uneven thickness of the belt itself on the online calibration accuracy of the few weights, before the belt conveyor conveys materials, the weighing control instrument establishes the calibration starting point of the belt weight through the starting point detector, so as to automatically zero the belt weight which is larger than the belt moving length of the standard weights released by the weight bin within the conveying time, Ensure that the weight of the belt is zero within the length of the belt when the weighing control instrument calibrates the amount of material transported. The weighing device of belt feeder adopts starting point detector, two belt scales and a weight bin, and uses a weighing control instrument to realize on-line less weight instead of more materials or more weights for belt scale comparison and calibration, so as to realize high-precision weighing<
specific implementation mode
the weighing device of the belt feeder includes a first belt scale frame, a buffer idler group, a weight bin, a second belt scale frame, a weight collection bracket, a starting point detector, a weighing control instrument, a speedometer, a weight and a feeder frame. The first belt scale frame and the second belt scale frame are installed on the feeder, which are located between the lower belt of the feeder and the upper belt of the feeder. A buffer idler group is installed between the first belt scale frame and the second belt scale frame. A weight bin is set above the buffer idler group. There are weights in the weight bin. The weight bin is connected with the feeder, and the weight collection bracket is connected with the head of the feeder, The starting point detector and speed detector are installed on the feeder. The weighing control instrument is connected with the first belt scale frame, the second belt scale frame, the starting point detector and the speedometer through a cable
when the feeder transports materials, weights are pre placed in the weight bin on the feeder. The weighing control instrument detects the starting point of belt calibration through the starting point detector. The weighing control instrument outputs a signal to control the weight bin to release the weights and put them on the materials on the belt on the conveyor. The weights run with the materials, When it reaches the feeder head, it runs to the weight collection bracket; At this time, the first belt weigher measures the cumulative weight of the transported materials, and the second belt weigher measures the sum of the cumulative weight of the transported materials and the weight of the weights released from the weight bin, based on the fact that the first belt weigher and the second belt weigher pass through the same amount of transported materials, The weighing control instrument removes the accumulated weight value of the second belt scale from the accumulated weight value of the first belt scale, and obtains the actual weighing value of the weight released from the weight bin. The actual weighing weight value is compared with the weight value of the standard weight obtained from the internal counting of the weighing control instrument, and the correction coefficient is obtained, According to the correction coefficient, the range coefficient of weighing control instrument is corrected to make it display the weight value of standard material, and the belt scale measurement accuracy is high precision and high stability by comparing and correcting regularly. At this time, the whole length of the belt feeder is covered with materials, and the calibration condition is close to the normal conveying condition. Online less weight calibration is used instead of multi material or multi weight calibration
the uneven thickness of the belt of the belt feeder is the main factor that affects the use of online less weight calibration instead of multi material or multi weight calibration. In order to rece the impact of uneven thickness of the belt on the accuracy of online calibration of less weight, the starting point of belt self weight calibration is established by the weighing control instrument through the starting point detector before the belt conveyor conveys materials, This calibration starting point is used to automatically zero the weight of the belt which is larger than the moving length of the belt in the conveying time of the weights released by the conveying weight bin, so as to ensure that the weight of the belt in this section of the belt length is zero when the weighing control instrument calibrates the conveying material quantity, so as to ensure the accuracy of less materials replacing more materials or multi weights calibration.
2.
According to the provisions of the mineral resources law of the people's Republic of China, Article 39, in violation of the provisions of this law, mining without a mining license, entering the state planned mining area, mining within a mining area of great value to the national economy, and mining specific minerals prescribed by the state for protective mining, Order to stop mining and compensate for losses, confiscate the mined mineral procts and illegal income, and may concurrently impose a fine; Those who refuse to stop mining and cause damage to mineral resources shall be investigated for criminal responsibility in accordance with the provisions of Article 156 of the criminal law
Units and indivials who enter the mining areas of state-owned mining enterprises and other mining enterprises established by others according to law shall be punished in accordance with the provisions of the preceding paragraph Article 40 If mining beyond the approved mining area, it shall be ordered to return to the mining area for mining and compensate for the losses, and the mineral procts and illegal income from cross-border mining shall be confiscated and a fine may be imposed; Those who refuse to return to the mining area for mining and cause damage to mineral resources shall have their mining license revoked and the persons directly responsible shall be investigated for criminal responsibility in accordance with the provisions of Article 156 of the criminal law Article 41 Anyone who steals or seizes mineral procts or other property of mining enterprises or exploration units, damages mining and exploration facilities, or disturbs the order of proction and work in mining areas and exploration areas shall be investigated for criminal responsibility in accordance with the relevant provisions of the criminal law; If the circumstances are obviously minor, the offender shall be punished in accordance with the relevant provisions of the regulations on administrative penalties for public security Article 42 Where mineral resources are sold, leased or transferred in other forms, the illegal gains shall be confiscated and a fine shall be imposed If anyone, in violation of the provisions of Article 6 of this law, resells the exploration right or mining right for profit, his exploration license or mining license shall be revoked, his illegal income shall be confiscated and he shall be fined Article 43 anyone who, in violation of the provisions of this law, purchases or sells mineral procts uniformly purchased by the State shall have his mineral procts and illegal income confiscated and may also be fined; If the circumstances are serious, criminal responsibility shall be investigated in accordance with the provisions of articles 117 and 118 of the criminal law Article 44 anyone who, in violation of the provisions of this law, adopts destructive mining methods to mine mineral resources shall be fined and his mining license may be revoked; If serious damage is caused to mineral resources, the person directly responsible shall be investigated for criminal responsibility in accordance with the provisions of Article 156 of the criminal law Article 45 The administrative penalties prescribed in articles 39, 40 and 42 of this Law shall be decided by the Department in charge of the administration of Geology and mineral resources of the people's government at or above the county level within the limits of authority prescribed by the Department in charge of Geology and mineral resources under the State Council. The administrative penalty prescribed in Article 43 shall be decided by the administrative department for Instry and Commerce of the people's government at or above the county level The administrative penalty stipulated in Article 44 shall be decided by the Department in charge of Geology and mineral resources of the people's Government of the province, autonomous region or municipality directly under the central government. The punishment of revoking the exploration license or mining license shall be decided by the original license issuing organ If an administrative penalty should be imposed in accordance with the provisions of articles 39, 40, 42 and 44, but no administrative penalty is imposed, the Department in charge of Geology and mineral resources of the people's government at a higher level shall have the right to order correction or directly impose administrative penalty Article 47 the Department in charge of Geology and mineral resources of the people's government at a higher level shall have the right to cancel the exploration license and mining license illegally issued Article 48 those who obstruct state functionaries engaged in the supervision and administration of mineral resources exploration and mining from performing their ties according to law by means of violence or threat shall be investigated for criminal responsibility in accordance with the provisions of Article 157 of the criminal law; Those who refuse or hinder state functionaries engaged in the supervision and administration of mineral resources exploration and mining from performing their ties according to law without violence or threat shall be punished by the public security organs in accordance with the provisions of the regulations on administrative penalties for public security Article 156 Whoever intentionally destroys public or private property, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or fine Article 157 Whoever obstructs a state functionary from performing his ties according to law by means of violence or threat, or refuses to execute a legally effective judgment or written order of a people's court, shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention, fine or deprivation of political rights Article 158 forbids anyone to disturb social order by any means. If the circumstances of disrupting social order are serious, so that work, proction, business, teaching and scientific research cannot be carried out, and the state and society suffer serious losses, the ringleaders shall be sentenced to fixed-term imprisonment of not more than five years, criminal detention, public surveillance or deprivation of political rights3.
K-type reciprocating feeder is composed of frame, bottom plate (feeding trough) transmission platform, funnel gate, idler, etc. Its transmission principle: when the motor is started, the inclined bottom plate is driven by the elastic coupling, recer and crank linkage mechanism to make a linear reciprocating motion on the inserting roller, so as to evenly unload the coal to the transportation machinery or other screening equipment. The K-type reciprocating feeder is equipped with two forms: with funnel, with regulating valve and without funnel, without regulating valve. This machine is suitable for coal mines and coal preparation plants to load coal evenly into conveyors or other screening and storage devices through coal bunker
4.
The feeder detects the weight of the material passing through the weighing bridge to determine the weight of the material on the belt. The digital speed sensor installed at the tail continuously measures the running speed of the feeder. The pulse output of the speed sensor is proportional to the speed of the feeder. The speed signal and weight signal are sent to the feeder controller together, and the microprocessor in the controller is used for processing, Generate and display the cumulative / instantaneous flow. The flow rate is compared with the set flow rate, and the inverter is controlled by the output signal of the control instrument to change the driving speed of the feeder, so that the material flow rate on the feeder changes, approaches and remains at the set flow rate, so as to achieve the requirement of quantitative feeding.
5. Del / DEM
quantitative feeder is a kind of equipment for continuous conveying, dynamic weighing and feeding control of bulk and granular materials. It is suitable for building materials, metallurgy, mining, chemical instry and other instries< br />
DEL/DEM•
in terms of control, the quantitative feeder can automatically adjust the material flow by adjusting the belt speed according to the set feeding rate, so as to ensure the continuous conveying of materials at the set feeding rate, and automatically accumulate the total amount of materials transported; In terms of operation, it can be operated through the instrument keyboard, or through the upper computer or process management system
DCS
,
to complete the automatic control of the system
del / DEM
type quantitative feeder, through exquisite manufacturing technology and strict quality control system, ensures the proct quality
quantity. The
del / DEM
quantitative feeder with high precision and high stability has become an ideal equipment for batching and metering of granular materials in instry.
quantitative feeder is a kind of equipment for continuous conveying, dynamic weighing and feeding control of bulk and granular materials. It is suitable for building materials, metallurgy, mining, chemical instry and other instries< br />
DEL/DEM•
in terms of control, the quantitative feeder can automatically adjust the material flow by adjusting the belt speed according to the set feeding rate, so as to ensure the continuous conveying of materials at the set feeding rate, and automatically accumulate the total amount of materials transported; In terms of operation, it can be operated through the instrument keyboard, or through the upper computer or process management system
DCS
,
to complete the automatic control of the system
del / DEM
type quantitative feeder, through exquisite manufacturing technology and strict quality control system, ensures the proct quality
quantity. The
del / DEM
quantitative feeder with high precision and high stability has become an ideal equipment for batching and metering of granular materials in instry.
6. The instability of zero point is related to external factors
the zero point output of the feeder is composed of the weight of the idler and the belt, which is usually called "tare weight". The change of these factors causes the zero point change, the most important of which is caused by the change of the belt. The main reasons for the belt change are as follows:
(1) the moisture content of the material changes
the moisture not only increases the weight of the material, but also infiltrates into the belt, which increases the weight of the belt, The zero point of belt scale is increased. Large weighing error is caused. Moreover, if the cleaning scraper can not clean the accumulated material on the belt, it will increase the tare weight and repeat the measurement
(2) the influence of wind will proce lift effect on the belt, and the influence on the scale body is related to the shape of the belt surface, and is proportional to the wind speed and direction
(3) the change of belt tension
the tension of the new belt changes greatly at the initial stage of use, the tension of the spiral tension belt is not constant, and the tension device is rusty and can not play the role of constant tension
(4) the influence of large temperature difference on load cell and weighing instrument
(5) belt deviation and damage.
the zero point output of the feeder is composed of the weight of the idler and the belt, which is usually called "tare weight". The change of these factors causes the zero point change, the most important of which is caused by the change of the belt. The main reasons for the belt change are as follows:
(1) the moisture content of the material changes
the moisture not only increases the weight of the material, but also infiltrates into the belt, which increases the weight of the belt, The zero point of belt scale is increased. Large weighing error is caused. Moreover, if the cleaning scraper can not clean the accumulated material on the belt, it will increase the tare weight and repeat the measurement
(2) the influence of wind will proce lift effect on the belt, and the influence on the scale body is related to the shape of the belt surface, and is proportional to the wind speed and direction
(3) the change of belt tension
the tension of the new belt changes greatly at the initial stage of use, the tension of the spiral tension belt is not constant, and the tension device is rusty and can not play the role of constant tension
(4) the influence of large temperature difference on load cell and weighing instrument
(5) belt deviation and damage.
7. The main solutions are as follows:
in order to ensure the measurement accuracy, the weighing device of belt feeder can be designed as a device integrating weighing and online weight calibration. The combination of less weights and the materials on the original conveyor belt is used to replace the calibration of multiple materials or weights. It is easy to realize the online and convenient calibration of the measuring accuracy of the belt scale. The cost of the calibration equipment is low, and the calibration does not affect the normal operation, so as to ensure the measuring accuracy of the belt scale. The weighing device of belt feeder includes the first belt scale frame, buffer idler group, weight, weight bin, the second belt scale frame, weight collection bracket, starting point detector, weighing control instrument and speed detector, which realizes the weighing of the materials transported by the feeder and online less weight calibration of weighing accuracy
in the process of conveying materials, the weighing control instrument detects the starting point of belt calibration through the starting point detector, and the weighing control instrument outputs a signal to control the weight bin to release the weight. At this time, the first belt scale measures the accumulated amount of transported materials, and the second belt scale measures the sum of the accumulated amount of transported materials and the standard weight put down by the weight bin, Based on the fact that the accumulated amount of the transported materials passing through the first belt scale and the second belt scale is the same, the weighing control instrument removes the accumulated weight value weighed by the second belt scale from the accumulated weight value weighed by the first belt scale to obtain the standard weight value released by the weight bin, The actual weighing weight value is compared with the standard weight value obtained from the internal counting of the weighing control instrument, and the range coefficient of the weighing control instrument is corrected to make it display the standard weight value. The timing comparison and correction make the measuring accuracy of the belt scale reach high precision and high stability. At this time, there are materials on the whole belt feeder, and the calibration condition is close to the normal conveying condition. Online less weight calibration is used instead of multi material or multi weight calibration
in order to achieve online calibration with few weights instead of multiple materials or weights, the uneven thickness of belt is the main factor affecting the calibration accuracy; In order to rece the influence of the uneven thickness of the belt itself on the online calibration accuracy of the few weights, before the belt conveyor conveys materials, the weighing control instrument establishes the calibration starting point of the belt weight through the starting point detector, so as to automatically zero the belt weight which is larger than the belt moving length of the standard weights released by the weight bin within the conveying time, Ensure that the weight of the belt is zero within the length of the belt when the weighing control instrument calibrates the amount of material transported. The weighing device of belt feeder adopts starting point detector, two belt scales and a weight bin, and uses a weighing control instrument to realize on-line less weight instead of more materials or more weights for belt scale comparison and calibration, so as to realize high-precision weighing
specific implementation mode
the belt feeder weighing device includes a first belt scale frame, a buffer idler group, a weight bin, a second belt scale frame, a weight collection bracket, a starting point detector, a weighing control instrument, a speedometer, a weight and a feeder frame. The first belt scale frame and the second belt scale frame are installed on the feeder, which are located between the lower belt of the feeder and the upper belt of the feeder. A buffer idler group is installed between the first belt scale frame and the second belt scale frame. A weight bin is set above the buffer idler group. There are weights in the weight bin. The weight bin is connected with the feeder, and the weight collection bracket is connected with the head of the feeder, The starting point detector and speed detector are installed on the feeder. The weighing control instrument is connected with the first belt scale frame, the second belt scale frame, the starting point detector and the speedometer through a cable
when the feeder transports materials, weights are pre placed in the weight bin on the feeder. The weighing control instrument detects the starting point of belt calibration through the starting point detector. The weighing control instrument outputs a signal to control the weight bin to release the weights and put them on the materials on the belt on the conveyor. The weights run with the materials, When it reaches the feeder head, it runs to the weight collection bracket; At this time, the first belt weigher measures the cumulative weight of the transported materials, and the second belt weigher measures the sum of the cumulative weight of the transported materials and the weight of the weights released from the weight bin, based on the fact that the first belt weigher and the second belt weigher pass through the same amount of transported materials, The weighing control instrument removes the accumulated weight value of the second belt scale from the accumulated weight value of the first belt scale, and obtains the actual weighing value of the weight released from the weight bin. The actual weighing weight value is compared with the weight value of the standard weight obtained from the internal counting of the weighing control instrument, and the correction coefficient is obtained, According to the correction coefficient, the range coefficient of weighing control instrument is corrected to make it display the weight value of standard material, and the belt scale measurement accuracy is high precision and high stability by comparing and correcting regularly. At this time, the whole length of the belt feeder is covered with materials, and the calibration condition is close to the normal conveying condition. Online less weight calibration is used instead of multi material or multi weight calibration
the uneven thickness of the belt of the belt feeder is the main factor that affects the use of online less weight calibration instead of multi material or multi weight calibration. In order to rece the impact of uneven thickness of the belt on the accuracy of online calibration of less weight, the starting point of belt self weight calibration is established by the weighing control instrument through the starting point detector before the belt conveyor conveys materials, This calibration starting point is used to automatically zero the weight of the belt which is larger than the moving length of the belt in the conveying time of the weights released by the conveying weight bin, so as to ensure that the weight of the belt in this section of the belt length is zero when the weighing control instrument calibrates the conveying material quantity, so as to ensure the accuracy of less materials replacing more materials or multi weights calibration.
in order to ensure the measurement accuracy, the weighing device of belt feeder can be designed as a device integrating weighing and online weight calibration. The combination of less weights and the materials on the original conveyor belt is used to replace the calibration of multiple materials or weights. It is easy to realize the online and convenient calibration of the measuring accuracy of the belt scale. The cost of the calibration equipment is low, and the calibration does not affect the normal operation, so as to ensure the measuring accuracy of the belt scale. The weighing device of belt feeder includes the first belt scale frame, buffer idler group, weight, weight bin, the second belt scale frame, weight collection bracket, starting point detector, weighing control instrument and speed detector, which realizes the weighing of the materials transported by the feeder and online less weight calibration of weighing accuracy
in the process of conveying materials, the weighing control instrument detects the starting point of belt calibration through the starting point detector, and the weighing control instrument outputs a signal to control the weight bin to release the weight. At this time, the first belt scale measures the accumulated amount of transported materials, and the second belt scale measures the sum of the accumulated amount of transported materials and the standard weight put down by the weight bin, Based on the fact that the accumulated amount of the transported materials passing through the first belt scale and the second belt scale is the same, the weighing control instrument removes the accumulated weight value weighed by the second belt scale from the accumulated weight value weighed by the first belt scale to obtain the standard weight value released by the weight bin, The actual weighing weight value is compared with the standard weight value obtained from the internal counting of the weighing control instrument, and the range coefficient of the weighing control instrument is corrected to make it display the standard weight value. The timing comparison and correction make the measuring accuracy of the belt scale reach high precision and high stability. At this time, there are materials on the whole belt feeder, and the calibration condition is close to the normal conveying condition. Online less weight calibration is used instead of multi material or multi weight calibration
in order to achieve online calibration with few weights instead of multiple materials or weights, the uneven thickness of belt is the main factor affecting the calibration accuracy; In order to rece the influence of the uneven thickness of the belt itself on the online calibration accuracy of the few weights, before the belt conveyor conveys materials, the weighing control instrument establishes the calibration starting point of the belt weight through the starting point detector, so as to automatically zero the belt weight which is larger than the belt moving length of the standard weights released by the weight bin within the conveying time, Ensure that the weight of the belt is zero within the length of the belt when the weighing control instrument calibrates the amount of material transported. The weighing device of belt feeder adopts starting point detector, two belt scales and a weight bin, and uses a weighing control instrument to realize on-line less weight instead of more materials or more weights for belt scale comparison and calibration, so as to realize high-precision weighing
specific implementation mode
the belt feeder weighing device includes a first belt scale frame, a buffer idler group, a weight bin, a second belt scale frame, a weight collection bracket, a starting point detector, a weighing control instrument, a speedometer, a weight and a feeder frame. The first belt scale frame and the second belt scale frame are installed on the feeder, which are located between the lower belt of the feeder and the upper belt of the feeder. A buffer idler group is installed between the first belt scale frame and the second belt scale frame. A weight bin is set above the buffer idler group. There are weights in the weight bin. The weight bin is connected with the feeder, and the weight collection bracket is connected with the head of the feeder, The starting point detector and speed detector are installed on the feeder. The weighing control instrument is connected with the first belt scale frame, the second belt scale frame, the starting point detector and the speedometer through a cable
when the feeder transports materials, weights are pre placed in the weight bin on the feeder. The weighing control instrument detects the starting point of belt calibration through the starting point detector. The weighing control instrument outputs a signal to control the weight bin to release the weights and put them on the materials on the belt on the conveyor. The weights run with the materials, When it reaches the feeder head, it runs to the weight collection bracket; At this time, the first belt weigher measures the cumulative weight of the transported materials, and the second belt weigher measures the sum of the cumulative weight of the transported materials and the weight of the weights released from the weight bin, based on the fact that the first belt weigher and the second belt weigher pass through the same amount of transported materials, The weighing control instrument removes the accumulated weight value of the second belt scale from the accumulated weight value of the first belt scale, and obtains the actual weighing value of the weight released from the weight bin. The actual weighing weight value is compared with the weight value of the standard weight obtained from the internal counting of the weighing control instrument, and the correction coefficient is obtained, According to the correction coefficient, the range coefficient of weighing control instrument is corrected to make it display the weight value of standard material, and the belt scale measurement accuracy is high precision and high stability by comparing and correcting regularly. At this time, the whole length of the belt feeder is covered with materials, and the calibration condition is close to the normal conveying condition. Online less weight calibration is used instead of multi material or multi weight calibration
the uneven thickness of the belt of the belt feeder is the main factor that affects the use of online less weight calibration instead of multi material or multi weight calibration. In order to rece the impact of uneven thickness of the belt on the accuracy of online calibration of less weight, the starting point of belt self weight calibration is established by the weighing control instrument through the starting point detector before the belt conveyor conveys materials, This calibration starting point is used to automatically zero the weight of the belt which is larger than the moving length of the belt in the conveying time of the weights released by the conveying weight bin, so as to ensure that the weight of the belt in this section of the belt length is zero when the weighing control instrument calibrates the conveying material quantity, so as to ensure the accuracy of less materials replacing more materials or multi weights calibration.
8. GLD series belt feeder features:
1. Stable operation, fast speed, low noise, good explosion-proof performance, environmental protection procts
2. High efficiency and energy saving, low cost, large feeding capacity, up to thousands of tons per hour, which is unparalleled for ordinary models
3. According to the needs of users, the feeding quantity can be adjusted at will, either automatically or manually. If it is used with frequency converter, remote control can be realized. Shenhua09
4. With arch breaking device, it can better overcome the phenomenon of air blocking and arching in the warehouse, and ensure the smooth flow of materials
5. Simple installation, small use space, convenient replacement, low cost of technical transformation, short cycle and quick effect
6. Reliable quality, stable performance, common parts account for more than 90%, convenient for installation and maintenance
7. The auxiliary equipment is complete, which makes Shenhua complete in function and wide in performance
8. Multiple groups of buffer idlers are set at the bottom of the bin to enhance the impact resistance, protect the armour belt and annular strong belt, and improve the service life of armour belt and annular strong belt.
1. Stable operation, fast speed, low noise, good explosion-proof performance, environmental protection procts
2. High efficiency and energy saving, low cost, large feeding capacity, up to thousands of tons per hour, which is unparalleled for ordinary models
3. According to the needs of users, the feeding quantity can be adjusted at will, either automatically or manually. If it is used with frequency converter, remote control can be realized. Shenhua09
4. With arch breaking device, it can better overcome the phenomenon of air blocking and arching in the warehouse, and ensure the smooth flow of materials
5. Simple installation, small use space, convenient replacement, low cost of technical transformation, short cycle and quick effect
6. Reliable quality, stable performance, common parts account for more than 90%, convenient for installation and maintenance
7. The auxiliary equipment is complete, which makes Shenhua complete in function and wide in performance
8. Multiple groups of buffer idlers are set at the bottom of the bin to enhance the impact resistance, protect the armour belt and annular strong belt, and improve the service life of armour belt and annular strong belt.
9. K-type reciprocating feeder is composed of frame, bottom plate (feeding trough) transmission platform, funnel gate, idler, etc. Its transmission principle: when the motor is started, the inclined bottom plate is driven by the elastic coupling, recer and crank linkage mechanism to make a linear reciprocating motion on the inserting roller, so as to evenly unload the coal to the transportation machinery or other screening equipment. The machine is equipped with funnel, with regulating valve and without funnel, without regulating valve.
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