Full-automatic device and method for weighing, calibrating and checking coal feeder

Abstract

The invention relates to a full-automatic device and method for weighing, calibration and verification of a coal feeder. The full-automatic device comprises an intelligent weighing roller, an intelligent weighing sensor, a hydraulic calibration module and a hydraulic calibration and verification module. The intelligent weighing roller is integrated with a laser level meter and used for emitting laser to the auxiliary carrier rollers on the two sides and receiving reflected light so as to judge whether the intelligent weighing roller and the auxiliary carrier rollers on the two sides are located on the same horizontal plane or not. The intelligent weighing sensor is connected with the intelligent weighing roller and is used for measuring weight and driving the intelligent weighing roller to move up and down; the fixed end of the hydraulic calibration module is connected with the coal feeder, the output end is connected with the intelligent weighing roller, and the hydraulic calibration module is used for applying calibration hanging weight to the intelligent weighing roller for calibration work; the fixed end of the hydraulic calibration inspection module is connected with the coal feeder, and the output end of the hydraulic calibration inspection module is connected to the belt in a pressed mode, located above the intelligent weighing roller and used for applying load calibration weight to the belt. Compared with the prior art, the method has the advantages of being capable of effectively reducing manual calibration errors, simple and convenient to work, high in efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of coal feeder control, and in particular to a fully automatic device and method for weighing and calibration verification of a coal feeder. Background Art

[0002] A coal feeder is a belt feeder with a microcomputer-controlled electronic weighing and automatic speed regulation device, which can accurately convey coal blocks to a coal mill and has functions of automatic adjustment and control. When the coal feeder is used for the first time, or after one month of initial use, and every three months under normal use conditions, calibration work must be carried out, or the calibration cycle can also be formulated by the power plant. When changing the belt, adjusting the weighing rod, changing the weighing sensor, and changing the CPU board or microcomputer program chip, calibration work must also be carried out. For example, the invention with the publication number CN112009977A discloses a belt weighing coal feeder for a power plant with an independent control device and its control method, which mentions the calibration process based on a calibration block.

[0003] The calibration work includes eliminating the tare weight caused by the weighing rod, the weighing sensor support plate, and the coal feeder belt, etc., and also includes measuring the belt speed and its relationship with the motor speed, calibrating the output of the weighing sensor with a known calibration block, and finally testing the calibration work with a standard weight.

[0004] This calibration work takes a long time and is carried out jointly by multiple calibration personnel throughout the process, including manually calibrating the level between the weighing rod and the weighing roller, manually placing and taking the calibration block and manually placing and taking the standard weight, etc. A single calibration work can take about 1 hour, with low work efficiency and large human errors in calibration. It is difficult to meet the increasingly stringent metrological accuracy requirements, affecting the real-time performance of boiler combustion adjustment, and even reducing the thermal efficiency of the unit, resulting in poor economic assessment indicators and exceeding environmental protection indicators. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the existing technology that the weighing and calibration verification work of the coal feeder takes a long time and has low work efficiency, and to provide a fully automatic device and method for weighing and calibration verification of a coal feeder.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A fully automatic device for weighing and calibration verification of a coal feeder is installed on the coal feeder. The coal feeder includes a belt, a driving wheel assembly, and auxiliary rollers. The device includes an intelligent weighing rod, an intelligent weighing sensor, a hydraulic calibration module, and a hydraulic calibration inspection module;

[0008] The number of the auxiliary idlers is multiple, and they are located on both sides of the intelligent weighing rod. The intelligent weighing rod is integrated with a laser level, which is used to emit laser light to the auxiliary idlers on both sides and receive the reflected light to determine whether the intelligent weighing rod and the auxiliary idlers on both sides are on the same horizontal plane;

[0009] The intelligent weighing sensor is connected to the intelligent weighing rod, and is used for measuring the weight and driving the intelligent weighing rod to move up and down so that the intelligent weighing rod and the auxiliary idlers on both sides are on the same horizontal plane;

[0010] The fixed end of the hydraulic calibration module is connected to the coal feeder, and the output end is connected to the intelligent weighing rod, and is used for applying a calibration hanging weight to the intelligent weighing rod for calibration work;

[0011] The fixed end of the hydraulic calibration and inspection module is connected to the coal feeder, and the output end is pressed on the belt and is located above the intelligent weighing rod, and is used for applying a load calibration weight to the belt.

[0012] Further, the device further includes a microcomputer controller, and the microcomputer controller is respectively connected to the laser level, the intelligent weighing sensor, the hydraulic calibration module and the hydraulic calibration and inspection module of the intelligent weighing rod.

[0013] Further, the hydraulic calibration module is a hydraulic telescopic drive structure, and a calibration hanging weight is applied to the intelligent weighing rod through a hydraulic telescopic rod.

[0014] Further, the number of the hydraulic calibration modules is multiple, and they are symmetrically arranged on both sides of the intelligent weighing rod respectively.

[0015] Further, the hydraulic calibration and inspection module includes a hydraulic drive assembly, a connecting rod assembly and a pressing assembly. The hydraulic drive assembly is connected to the pressing assembly through the connecting rod assembly. The pressing assembly includes a mounting plate and a plurality of axle shafts mounted on the bottom surface of the mounting plate. Each axle shaft is arranged parallel to each other and is used for contacting the belt to apply pressure.

[0016] Further, the driving wheel assembly includes a driving roller, a tensioning wheel and a roller. The driving roller, the tensioning wheel, the roller, the intelligent weighing rod and the auxiliary idler are all located inside the belt and jointly support the belt.

[0017] The present invention also provides a weighing and calibration method based on the above-mentioned fully automatic device for weighing and calibrating a coal feeder, including a calibration process and a calibration process;

[0018] The calibration process includes the following steps:

[0019] Receive a weighing calibration control command, control the coal feeder to adapt its internal parameters to the weighing calibration parameters, and drive the belt to run;

[0020] Apply standard multi - level load calibration weights to the running belt in sequence through the hydraulic calibration inspection module, and calculate the nominal coal feeding rate values corresponding to the multi - level load calibration weights respectively; obtain the displayed value of the coal feeding rate calculated by the coal feeder based on the weight detected by the intelligent weighing sensor, calculate the error between the nominal coal feeding rate value and the displayed value. If it is within the preset weighing error range, the weighing verification is qualified; otherwise, correct the weighing factor or perform weighing calibration.

[0021] The calibration process includes the following steps:

[0022] Receive the weighing calibration control command, control the coal feeder to adapt the internal parameters to the weighing calibration parameters, and drive the belt to run.

[0023] Measure the overall levelness of the intelligent weighing rod and the auxiliary idlers on both sides by sending horizontal calibration light beams from the laser level on the intelligent weighing rod to the auxiliary idlers on both sides, and obtain the horizontal deviation value of the intelligent weighing rod; drive the intelligent weighing rod to move up and down through the intelligent weighing sensor according to this horizontal deviation value, so that the intelligent weighing rod and the auxiliary idlers on both sides are on the same horizontal plane.

[0024] First, perform no - load calibration work; then apply calibration hanging weight to the intelligent weighing rod through the hydraulic calibration module to perform load calibration work; record the tare weight, speed ratio, and weight coefficient respectively during the no - load calibration work and the load calibration work, and check the calibration value. If it is less than the preset calibration error range, the calibration is qualified; otherwise, repeat the no - load calibration work and the load calibration work.

[0025] Furthermore, the calculation expression of the coal feeding rate is:

[0026] Coal feeding rate = weight × belt speed.

[0027] Furthermore, during the verification process, if the error between the nominal coal feeding rate value and the displayed value is within ±5‰, the weighing verification is qualified; if the error is greater than ±5‰ and less than ±2%, correct it through the weighing factor; if the error is greater than ±2%, perform weighing calibration.

[0028] Furthermore, during the calibration process, when driving the intelligent weighing rod to move up and down through the intelligent weighing sensor, make the horizontal error value between the intelligent weighing rod and the auxiliary idlers on both sides less than or equal to ±0.05mm.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] (1) For the weighing calibration of traditional coal feeders, it is necessary to manually open the front, rear, left, and right side hatch doors of the coal feeder, remove the coal guide plate. The horizontal calibration between the weighing idler and the two side idlers is adjusted manually with a 0.02 mm feeler gauge and the adjustment screws on the weighing sensor to meet the standard requirements. This device measures the three-idler levelness by emitting horizontal calibration beams from the horizontal laser on the intelligent weighing idler to the two side idlers respectively, and adjusts the height of the intelligent weighing idler through the intelligent weighing sensor connected to the intelligent weighing idler, so that the upper surfaces of the intelligent weighing idler and the two side idlers are on the same horizontal plane, and the error can be less than or equal to ±0.05 mm.

[0031] (2) For the weighing calibration of traditional coal feeders, it is necessary to manually hang calibration blocks on both sides of the weighing idler, and finally place and take 20 4KG weighing weights at the front and rear hatch openings of the coal feeder for weighing calibration. For the above steps, this device can send remote control instructions from the microcomputer controller to the intelligent weighing sensor, hydraulic calibration module, and hydraulic calibration inspection module to automatically perform the calibration work throughout the process. The horizontal laser of the intelligent weighing idler measures the levelness with the two side idlers, the intelligent weighing sensor adjusts the horizontal position of the intelligent weighing idler, the hydraulic calibration module applies the calibration hanging weight for load calibration work, and the hydraulic calibration inspection module applies standard multi-level loads to the belt to calibrate the weight and perform weighing calibration, greatly improving the weighing calibration efficiency and shortening the working time to 20 minutes.

[0032] (3) The present invention can effectively reduce the manual calibration error. Calculated by reducing the coal metering error by 1%, the annual cost savings can reach one million yuan (taking a 600MW unit as an example).

[0033] (4) The calibration work of the present invention is simple and convenient, only requiring one-key operation, and can reduce a large amount of labor costs.

[0034] (5) The calibration work of the present invention is completed with high efficiency, can effectively shorten the manual calibration working time, and improve the timeliness of coal adjustment. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of a fully automatic device for weighing calibration of a coal feeder provided in an embodiment of the present invention;

[0036] In the figure, 1. Intelligent weighing idler, 2. Intelligent weighing sensor, 3. Hydraulic calibration module, 4. Hydraulic calibration inspection module, 5. Microcomputer controller, 6. Belt, 7. Driving roller, 8. Tensioning wheel, 9. Roller, 10. Auxiliary idler. Detailed Embodiment

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0039] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0041] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0042] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0043] Embodiment 1

[0044] As Figure 1As shown in the figure, this embodiment provides a fully automatic device for calibrating the weighing of a coal feeder, which is installed on the coal feeder. The coal feeder includes a belt 6, a driving wheel assembly, and auxiliary rollers 10. The device includes an intelligent weighing rod 1, an intelligent weighing sensor 2, a hydraulic calibration module 3, and a hydraulic calibration inspection module 4;

[0045] The number of auxiliary rollers 10 is multiple, located on both sides of the intelligent weighing rod 1. The intelligent weighing rod 1 is integrated with a laser level, which is used to emit laser light to the auxiliary rollers 10 on both sides and receive the reflected light to determine whether the intelligent weighing rod 1 and the auxiliary rollers 10 on both sides are on the same horizontal plane;

[0046] The intelligent weighing sensor 2 is connected to the intelligent weighing rod 1, used to measure the weight and drive the intelligent weighing rod 1 to move up and down, so that the intelligent weighing rod 1 and the auxiliary rollers 10 on both sides are on the same horizontal plane;

[0047] The fixed end of the hydraulic calibration module 3 is connected to the coal feeder, and the output end is connected to the intelligent weighing rod 1, used to apply a calibrated hanging weight to the intelligent weighing rod 1 for calibration work;

[0048] The fixed end of the hydraulic calibration inspection module 4 is connected to the coal feeder, and the output end is crimped on the belt 6 and located above the intelligent weighing rod 1, used to apply a load calibration weight to the belt 6.

[0049] Preferably, the device further includes a microcomputer controller 5, which is respectively connected to the laser level of the intelligent weighing rod 1, the intelligent weighing sensor 2, the hydraulic calibration module 3, and the hydraulic calibration inspection module 4, and can be controlled with one key through the microcomputer controller 5.

[0050] In this embodiment, the intelligent weighing rod 1 is integrated with a laser level (wavelength 650nm, accuracy ±0.02mm). After emitting laser light to the auxiliary rollers 10 on both sides and receiving the reflected light, the connecting rod distance between the intelligent weighing sensor 2 and the intelligent weighing rod 1 is automatically rotated up and down to make the upper surfaces of the intelligent weighing rod 1 and the auxiliary rollers 10 on both sides on the same horizontal plane.

[0051] The auxiliary rollers 10 on both sides are fixed in the horizontal direction.

[0052] Specifically, the hydraulic calibration module 3 is used to apply the calibration value of the calibration module to the intelligent weighing sensor 2.

[0053] Preferably, the hydraulic calibration module 3 is a hydraulic telescopic drive structure, and a calibrated hanging weight is applied to the intelligent weighing rod 1 through a hydraulic-driven telescopic rod.

[0054] The number of hydraulic calibration modules 3 is multiple, and they are symmetrically arranged on both sides of the intelligent weighing rod 1 respectively.

[0055] In this embodiment, the number of the hydraulic calibration modules 3 is two, which are respectively located at both ends of the intelligent weighing rod 1.

[0056] Preferably, the hydraulic calibration inspection module 4 includes a hydraulic driving assembly, a connecting rod assembly and a pressing assembly. The hydraulic driving assembly is connected to the pressing assembly through the connecting rod assembly. The pressing assembly includes a mounting plate and a plurality of axles mounted on the bottom surface of the mounting plate. The axles are arranged parallel to each other and are used to contact the belt 6 for pressing.

[0057] In this embodiment, the connecting rod assembly includes a left connecting rod and a right connecting rod, which are respectively connected to the hydraulic driving assembly at the top and the mounting plate at the bottom. The upper end of the hydraulic driving assembly is fixed to the top of the coal feeder.

[0058] In this embodiment, the driving wheel assembly includes a driving roller 7, a tensioning wheel 8 and a roller 9. The driving roller 7, the tensioning wheel 8, the roller 9, the intelligent weighing rod 1 and the auxiliary idler 10 are all located inside the belt 6 and jointly support the belt 6.

[0059] Embodiment 2

[0060] This embodiment provides a weighing and calibration method for a fully automatic device for weighing and calibrating a coal feeder based on the one in Embodiment 1, including a calibration process and a calibration process;

[0061] The calibration process includes the following steps:

[0062] Receive a weighing and calibration control command, that is, click the "Automatic Weighing" button on the liquid crystal display panel of the coal feeder, control the coal feeder to adapt its internal parameters to the weighing calibration parameters, and drive the belt 6 to run;

[0063] Apply standard multi-level load calibration weights to the running belt 6 in sequence through the hydraulic calibration inspection module 4, and calculate the nominal coal feeding rate values corresponding to the multi-level load calibration weights respectively; obtain the displayed value of the coal feeding rate calculated based on the weight detected by the intelligent weighing rod 1 of the coal feeder, calculate the error between the nominal coal feeding rate value and the displayed value. If it is within the preset weighing error range, the weighing calibration is qualified, otherwise, correct the weighing factor or perform weighing calibration;

[0064] The calibration process includes the following steps:

[0065] Receive a weighing and calibration control command, control the coal feeder to adapt its internal parameters to the weighing calibration parameters, and drive the belt 6 to run;

[0066] The overall levelness of the intelligent weighing rod 1 and the auxiliary idlers 10 on both sides is measured by the laser level on the intelligent weighing rod 1 to emit horizontal calibration beams to the auxiliary idlers 10 on both sides, and the horizontal deviation value of the intelligent weighing rod 1 is obtained; according to this horizontal deviation value, the intelligent weighing rod 1 is driven to move up and down by the intelligent weighing sensor 2, so that the intelligent weighing rod 1 and the auxiliary idlers 10 on both sides are on the same horizontal plane;

[0067] First, the no-load calibration work is carried out; then, the calibration hanging weight is applied to the intelligent weighing rod 1 by the hydraulic calibration module 3 to carry out the load calibration work; during the no-load calibration work and the load calibration work, the tare weight, speed ratio and weight coefficient are respectively recorded, and the calibration value is checked. If it is less than the preset calibration error range, the calibration is qualified, otherwise, the no-load calibration work and the load calibration work are repeated.

[0068] Specifically, the calculation expression of the coal feeding rate is:

[0069] Coal feeding rate = weight × belt speed.

[0070] Preferably, during the calibration process, if the error between the nominal value and the displayed value of the coal feeding rate is within ±5‰, the weighing calibration is qualified; if the error is greater than ±5‰ and less than ±2%, it is corrected by the weighing factor; if the error is greater than ±2%, the weighing calibration is carried out.

[0071] Preferably, during the calibration process, when the intelligent weighing rod 1 is driven to move up and down by the intelligent weighing sensor 2, the horizontal error value between the intelligent weighing rod 1 and the auxiliary idlers 10 on both sides is less than or equal to ±0.05 mm.

[0072] In this embodiment, the above calibration process and calibration process are specifically as follows:

[0073] 1. Calibration process

[0074] An automatic weighing calibration instruction is issued by the microcomputer controller. The internal parameters of the coal feeder are automatically adjusted to the weighing calibration parameters. The radius of the driving roller 7 is 13.27 cm and the rotational speed is 3 R / sec, that is, the belt speed is 2.5 M / sec. The precise distance between the two weighing idlers gives a belt length for material weighing, which is 0.5 M. According to the measuring formula for coal feeding rate: Coal feeding rate (T / sec) = Weight (T / M) × Belt speed (M / sec). The hydraulic calibration inspection module 4 placed at the top of the internal bin of the coal feeder automatically applies standard 4-level load calibrating weights (3T, 6T, 9T, 12T) to the running belt in sequence, that is, the coal feeding rate set values (15T / h, 30T / h, 45T / h, 60T / h). Then, the microcomputer controller 5 calculates the error between the nominal value and the displayed value. If the error is within ±5‰, the weighing calibration is qualified. If the error is greater than ±5‰ and less than ±2%, the microcomputer controller 5 can automatically correct it through the weighing factor. If the error is greater than ±2%, weighing graduation is required.

[0075] 2. Graduation process

[0076] An automatic graduation calibration instruction is issued by the microcomputer controller 5. The internal parameters of the coal feeder are automatically adjusted to the weighing graduation parameters. The horizontal laser on the intelligent weighing idler emits horizontal calibration light beams to the auxiliary idlers 10 on both sides respectively to measure the three-idler levelness. Through the measured horizontal deviation value, the intelligent weighing sensor 2 automatically rotates up and down to adjust the connecting rod between the intelligent weighing idler 1 and the intelligent weighing sensor 2, so that the upper surfaces of the intelligent weighing idler 1 and the auxiliary idlers 10 on both sides are on the same horizontal plane, and the horizontal error value is less than or equal to ±0.05 mm. The microcomputer controller 5 first conducts the CAL1 (no-load calibration) calibration work, and then the hydraulic graduation module 3 applies the graduation hanging weight to the intelligent weighing idler 1 to conduct the CAL2 (load calibration) calibration work. The microcomputer controller 5 records the tare weight, speed ratio and weight coefficient, checks the percentage error of the secondary graduation value, and the error should be less than ±0.2%, and the graduation is qualified. Otherwise, repeat the CAL1 (no-load calibration)\CAL2 (load calibration) calibration work. Finally, the calibration mode is carried out again.

[0077] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. An automatic device for calibrating the weighing of a coal feeder, which is installed on the coal feeder. The coal feeder includes a belt (6), a driving wheel assembly, and auxiliary rollers (10), and is characterized in that, The device includes an intelligent weighing rod (1), an intelligent weighing sensor (2), a hydraulic calibration module (3), and a hydraulic calibration inspection module (4); The number of the auxiliary idlers (10) is multiple, and they are located on both sides of the intelligent weighing rod (1). The intelligent weighing rod (1) is integrated with a laser level, which is used to emit laser light to the auxiliary idlers (10) on both sides and receive the reflected light to determine whether the intelligent weighing rod (1) and the auxiliary idlers (10) on both sides are on the same horizontal plane; The intelligent weighing sensor (2) is connected to the intelligent weighing rod (1), and is used to measure the weight and drive the intelligent weighing rod (1) to move up and down, so that the intelligent weighing rod (1) and the auxiliary idlers (10) on both sides are on the same horizontal plane; The fixed end of the hydraulic calibration module (3) is connected to the coal feeder, and the output end is connected to the intelligent weighing rod (1), and is used to apply a calibration hanging weight to the intelligent weighing rod (1) for calibration work; The fixed end of the hydraulic calibration inspection module (4) is connected to the coal feeder, and the output end is pressed on the belt (6) and is located above the intelligent weighing rod (1), and is used to apply a load calibration weight to the belt (6); 2. The fully automatic device for calibrating the weighing of a coal feeder according to claim 1, characterized in that, The device further includes a microcomputer controller (5), and the microcomputer controller (5) is respectively connected to the laser level of the intelligent weighing rod (1), the intelligent weighing sensor (2), the hydraulic calibration module (3), and the hydraulic calibration inspection module (4); 3. The fully automatic device for calibrating the weighing of a coal feeder according to claim 1, characterized in that, The hydraulic calibration module (3) is a hydraulic telescopic drive structure, and applies a calibration hanging weight to the intelligent weighing rod (1) through a hydraulic-driven telescopic rod; 4. The fully automatic device for calibrating the weighing of a coal feeder according to claim 1, characterized in that, The number of the hydraulic calibration modules (3) is multiple, and they are symmetrically arranged on both sides of the intelligent weighing rod (1) respectively; 5. The fully automatic device for weighing and calibration verification of a coal feeder according to claim 1, characterized in that, The hydraulic calibration inspection module (4) includes a hydraulic drive assembly, a connecting rod assembly, and a pressing assembly. The hydraulic drive assembly is connected to the pressing assembly through the connecting rod assembly. The pressing assembly includes a mounting plate and a plurality of axle shafts mounted on the bottom surface of the mounting plate. Each axle shaft is arranged parallel to each other and is used to contact the belt (6) for pressing; 6. The fully automatic device for weighing and calibration verification of a coal feeder according to claim 1, wherein, The driving wheel assembly includes a driving roller (7), a tensioning wheel (8), and a roller (9). The driving roller (7), the tensioning wheel (8), the roller (9), the intelligent weighing rod (1), and the auxiliary idler (10) are all located inside the belt (6) and jointly support the belt (6); 7. A weighing calibration method for a full-automatic weighing calibration device of a coal feeder as described in any one of claims 1-6, characterized in that, It includes a calibration process and a calibration process; The calibration process includes the following steps: Receive a weighing calibration control command, control the coal feeder to adapt the internal parameters to the weighing calibration parameters, and drive the belt (6) to run; Sequentially apply standard multi-level load calibration weights to the running belt (6) through the hydraulic calibration inspection module (4), and respectively calculate the nominal coal feeding rate values corresponding to the multi-level load calibration weights; obtain the display value of the coal feeding rate calculated by the coal feeder based on the weight detected by the intelligent weighing sensor (2), calculate the error between the nominal coal feeding rate value and the display value. If it is within the preset weighing error range, the weighing calibration is qualified, otherwise, the weighing factor is corrected or the weighing calibration is carried out; The calibration process includes the following steps: Receive the weighing calibration control command, control the coal feeder to adapt the internal parameters to the weighing calibration parameters, and drive the belt (6) to run; Use the laser level on the intelligent weighing rod (1) to emit horizontal calibration beams to the auxiliary idlers (10) on both sides respectively to measure the overall levelness of the intelligent weighing rod (1) and the auxiliary idlers (10) on both sides, and obtain the horizontal deviation value of the intelligent weighing rod (1); drive the intelligent weighing rod (1) to move up and down through the intelligent weighing sensor (2) according to this horizontal deviation value, so that the intelligent weighing rod (1) and the auxiliary idlers (10) on both sides are on the same horizontal plane; First, carry out the no-load calibration work; then apply the calibration hanging weight to the intelligent weighing rod (1) through the hydraulic calibration module (3) to carry out the load calibration work; record the tare weight, speed ratio and weight coefficient respectively during the no-load calibration work and the load calibration work, and check the calibration value. If it is less than the preset calibration error range, the calibration is qualified, otherwise, repeat the no-load calibration work and the load calibration work.

8. The method according to claim 7, characterized in that The calculation expression of the coal feeding rate is: Coal feeding rate = weight × belt speed.

9. The method according to claim 7, wherein During the calibration process, if the error between the nominal value and the displayed value of the coal feeding rate is within ±5‰, the weighing calibration is qualified; if the error is greater than ±5‰ and less than ±2%, it is corrected by the weighing factor; if the error is greater than ±2%, the weighing calibration is carried out.

10. The method according to claim 7, characterized in that, During the calibration process, when the intelligent weighing rod (1) is driven to move up and down through the intelligent weighing sensor (2), the horizontal error value between the intelligent weighing rod (1) and the auxiliary idlers (10) on both sides is less than or equal to ±0.05 mm.

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