A coal storage quantity measuring and weighing device for coal storage Euro warehouse

Abstract

The present invention relates to a coal storage quantity measuring and weighing device for a coal storage warehouse, comprising a plurality of measuring and weighing modules, each of which comprises a scale body, a weighing platform and a weighing sensor, the scale body is a box structure with one end open and fixed to the bottom of the cylinder of the warehouse, the weighing platform is a box structure and matches the scale body, the weighing platform is arranged in the scale body and forms a first cavity with the scale body, the weighing platform is provided with a pressure transmitting head located in the first cavity, the weighing sensor is arranged in the first cavity, and one end is fixed to the scale body through a sensor fixing seat, and the other end is in contact with the pressure transmitting head. Compared with the prior art, the present invention has high precision, good accuracy, high reliability, can measure in real time, is easy to disassemble and assemble, is not affected by the coal state, and is conducive to accurate management of production.

Description

Technical Field

[0001] The invention relates to a coal storage technology, in particular to a coal storage quantity measuring and weighing device for a coal storage warehouse. Background Art

[0002] Euro warehouse coal storage is the latest domestic coal storage method, which has the characteristics of small footprint, energy saving and consumption reduction, and green environmental protection. In foreign countries, the coal storage capacity of Euro warehouses is always determined by measuring the height of coal stacking in the warehouse.

[0003] like Figure 1 The top of the Euro warehouse cylinder 1 is provided with a warehouse top trestle 3, and a belt conveyor is arranged in the warehouse top trestle 3. A revolving trestle 4, a central telescopic drop pipe 6, a spiral frame 8 and an A-frame 11 are arranged in the cylinder 1. The spiral frame 8 and the A-frame 11 are hung on the revolving trestle 4 through a lifting wire rope 7 and a winch. The spiral frame 8 is connected to the A-frame 11. A spiral machine 9 is arranged on the spiral frame 8. The revolving trestle 4 is arranged on the circular track on the inner wall of the cylinder 1 through a walking mechanism 5. The revolving trestle A central hoisting platform 12 is provided at the center of the bridge 4. The central telescopic drop pipe 6 is coaxial with the cylinder 1 and passes through the central hoisting platform 12. The upper end of the central telescopic drop pipe 6 is aligned with the feed port 2 on the warehouse top trestle 3, and the lower end is connected to the screw machine 9 through a guide trough, and a guide trough dust cover 10 is provided on the guide trough. The coal is transported to the feed port 2 by the belt conveyor of the feed port 2, and is transported to the screw machine 9 by the central telescopic drop pipe 6. The coal falls into the cylinder 1 from the drop port of the screw machine 9. The screw machine 9 rotates with the rotation of the revolving trestle 4, and at the same time, it performs lifting and lowering motions through the lifting wire rope 7, so that the coal can be evenly stored in the cylinder 1. The central telescopic drop pipe 6 is formed by concentrically connecting several sections of circular tubes of different diameters, and can be expanded or contracted section by section. Therefore, the distance between the two ends of the central telescopic drop pipe 6 can change with the distance between the revolving trestle 4 and the spiral frame 8.

[0004] The rotating screw machine 9 will pile up the coal that falls to the bottom of the cylinder 1 from the center along the radial direction. The piled coal can maintain the same horizontal height. When the screw machine 9 piles the coal to the circumference until the inner wall of the bin, the revolving trestle 4 will move a distance in the circumferential direction under the drive of the walking mechanism 5. The spiral frame 8 rotates with the rotation of the revolving trestle 4. After rotating a certain angle, the coal entering the bin will start to pile up from the center to the circumferential bin wall. Repeat the above operation until the coal in the cylinder 1 is piled to the same horizontal height. At this time, the lifting wire rope 7 makes the spiral frame 8 move upward through the winch. After rising to a certain height, repeat the above process of piling up coal. In short, when the coal enters the bin and piles up, the Eurobin equipment can pile the coal into a coal pile that is consistent with the cylindrical space in the cylinder 1, and can keep the upper surface of the coal pile always in a relatively horizontal plane, and at the same time form a drop hole in the center of the coal pile. When the coal is unloaded from the warehouse, the screw machine 9 rotates in the opposite direction, scrapes the coal on the upper surface of the coal pile along the radial direction to the center position, and drops the coal from the drop hole to the coal drop hopper 14, and then unloads from the coal drop hopper 14. The scraped coal pile surface is still a horizontal plane. Therefore, the upper surface of the coal pile in the Euro warehouse is always kept in a horizontal plane state whether the coal is being loaded into the warehouse or unloaded.

[0005] During the coal storage operation, the coal quality in the Euro warehouse, that is, the coal storage quantity, needs to be measured. By measuring the coal storage quantity, the coal storage situation in the warehouse can be determined to determine when the warehouse needs to be replenished. Otherwise, the coal entering the factory cannot be unloaded into the warehouse in time because there is too much coal in the Euro warehouse and the volume for loading coal is insufficient. If the coal is transported by ship, demurrage will be incurred, and other means of transportation will have the same problem. The thermal power plant can also determine the coal consumption for power generation by measuring the change in the coal storage quantity in the Euro warehouse. In addition, the change in the coal storage quantity in the Euro warehouse can also reflect the change in the power generation cost. In short, the coal storage quantity in the Euro warehouse is a very important production data for the thermal power plant. Accurately measuring the coal storage quantity is conducive to scientifically managing the production process of the power generation enterprise and determining the economic benefits.

[0006] Since the upper surface of the coal in the Euro bin can be regarded as a horizontal plane, even if the upper surface of the coal pile is uneven after discharging, the screw machine 9 can be used to level the upper surface of the coal pile and make it a horizontal plane. The shape of the coal pile in the entire bin is a cylinder. Therefore, as long as the height of the coal in the Euro bin is determined, that is, the difference between the height of the coal pile starting from the bottom of the bin and the final height of the coal pile is the actual height of the coal pile, the volume of the coal pile can be accurately determined. Since the distance between the screw machine 9 and the upper surface of the coal pile is relatively close, the height of the spiral frame 8 can be determined by measuring the length of the lifting wire rope 7, and the winch itself is equipped with a measuring device, which can accurately measure this value, so the height of the coal pile in the Euro bin can be directly obtained.

[0007] However, although the coal entering the Euro bin will not change its position due to the action of other forces and is basically in a static state, the coal stacking height in the Euro bin is very high, up to 42.5 meters. When the upper layer of coal is stacked, the lower layer of coal will be gradually compacted. The density of coal from the upper surface of the coal pile to the lower surface of the coal pile is in a gradient relationship with the height of the coal. Therefore, the density inside the coal pile gradually increases from top to bottom. The actual coal quality is different when the same volume of coal is taken out at different heights. In addition, as the storage time of the coal stored in the Euro bin increases, the external moisture of the coal will flow downward and eventually flow out through the drainage pipe at the bottom of the bin. The amount of coal stored in the bin will also change. Therefore, the density of the overall coal pile is difficult to determine. The method of simply measuring the height of the coal pile in the bin to determine the amount of coal stored has a large error. Moreover, the larger the coal storage amount and the higher the height of the coal pile, the greater the error, which cannot meet the actual production needs. Summary of the invention

[0008] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a coal storage quantity measuring and weighing device for a coal storage warehouse. The device has high precision, good accuracy, high reliability, can measure in real time, is easy to disassemble and assemble, is not affected by the coal state, and is conducive to accurate management of production.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] A coal storage quantity measuring and weighing device for a coal storage euro warehouse comprises a plurality of measuring and weighing modules, each measuring and weighing module comprises a scale body, a weighing platform and a weighing sensor, the scale body is a box structure with one end open and fixed at the bottom of a cylinder of the euro warehouse, the weighing platform is a box structure and matches the scale body, the weighing platform is arranged in the scale body and forms a first cavity with the scale body, the weighing platform is provided with a pressure transmitting head located in the first cavity, the weighing sensor is arranged in the first cavity, one end of the weighing sensor is fixed to the scale body through a sensor fixing seat, and the other end is in contact with the pressure transmitting head;

[0011] The density of the coal pile in the cylinder presents a gradient change in the vertical direction and remains consistent in the horizontal direction. Therefore, the pressure from the coal pile at each position of the bottom of the cylinder is the same. It is only necessary to measure the pressure in a limited area on the bottom of the cylinder through the metering and weighing module, and then the total coal storage capacity in the bin is calculated according to the bottom area of ​​the cylinder. It is not affected by the coal state, has high accuracy and reliability, and does not change the original structure of the Euro bin, and does not affect the normal operation of the Euro bin. At the same time, the metering and weighing module can measure in real time, so the amount of coal entering and leaving the bin each time can be obtained, which is conducive to accurate management of production;

[0012] A number of metering and weighing modules are arranged at the bottom of the cylinder, and the amount of coal is measured by each of the metering and weighing modules, and then a comprehensive evaluation is performed, thereby improving the accuracy of the measurement result.

[0013] At the same time, the scale body and the scale platform are two independent structures. When the coal in the cylinder is emptied, it is easy to disassemble and take out the weighing sensor that needs to be repaired and calibrated;

[0014] Since the density of the coal pile in the cylinder remains consistent in the horizontal direction, and the density of the coal pile in the cylinder presents a gradient change in the vertical direction, the pressure on the inner wall of the cylinder also presents a gradient change. Therefore, the pressure on the inner wall of the cylinder at the same height as the bottom of the cylinder is equal to the pressure measured by the metering weighing module, and is the maximum value. Therefore, when the pressure value is close to the limit value, the coal is stopped from entering the warehouse, or the coal is taken out as soon as possible to ensure the safety of the cylinder, which has an early warning function.

[0015] Furthermore, the upper surface of the weighing platform is flush with the opening end of the weighing body.

[0016] Furthermore, the device also includes a weighing platform pressure plate, a weighing body pressure plate and a flexible seal. A sealing flange is provided at one end of the weighing body opening. The flexible seal is arranged in the gap between one end of the weighing body opening and the upper surface of the weighing platform. The weighing platform pressure plate, the flexible seal and the weighing platform are connected in sequence by bolts. The weighing body pressure plate, the flexible seal and the sealing flange are connected in sequence by bolts to ensure that the flexible seal can cover the joint between the weighing platform and one end of the weighing body opening to prevent water, gas or coal particles from entering the first cavity.

[0017] Furthermore, a supporting protrusion is provided on the side wall of the weighing platform, and an offset groove matching the supporting protrusion is provided on the inner wall of the weighing body. The supporting protrusion is arranged in the offset groove. The offset groove supports the weighing platform through the supporting protrusion, thereby preventing the weight of the coal from directly acting on the flexible seal, while the lower part of the flexible seal has no support, thereby causing shear damage and cracking of the flexible seal, thereby improving the service life of the flexible seal.

[0018] Furthermore, a plurality of positioning blocks are evenly arranged on the outer wall of the weighing platform, and the positioning blocks maintain a distance of 1 to 3 mm from the inner wall of the weighing body. During installation, the spacing between each side of the weighing platform and the inner wall of the weighing body is ensured to be equal, so as to avoid contact between the outer wall of the weighing platform and the inner wall of the weighing body, generate friction resistance and affect the measurement result.

[0019] Furthermore, the end face of the weighing sensor is provided with a pressure arc surface matching the end of the pressure transmitting head, and the end of the pressure transmitting head contacts the pressure arc surface, ensuring that the pressure transmitting head only applies a vertical downward force to the weighing sensor, thereby ensuring the normal operation of the weighing sensor and improving the measurement accuracy.

[0020] Furthermore, a second cavity is provided in the weighing platform to reduce the weight of the weighing platform, and a stiffening rib is provided in the second cavity to improve the rigidity of the weighing platform. The rigidity of the weighing platform is such that it will not be deformed under the pressure generated by the accumulation of coal in the Euro bin.

[0021] Furthermore, a cable box is provided in the scale body for accessing and fixing the output cable connected to the weighing sensor. A cable output line pipe joint is provided on the outer wall of the scale body, and the signal line is contacted through the cable output line pipe joint, which has good sealing performance, prevents water from accumulating at the bottom of the cylinder from entering the scale body, and has good safety.

[0022] Furthermore, the scale body is fixed to the bottom of the cylinder through fixed feet.

[0023] Furthermore, there are multiple weighing sensors, which are symmetrically arranged on the scale body to form a stable supporting plane that can fully support the pressure borne by the scale platform.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention includes a metering weighing module, which includes a scale body, a weighing platform and a weighing sensor. The scale body is a box structure with an opening at one end and is fixed to the bottom of the cylinder of the Euro bin. The weighing platform is a box structure and matches the scale body. The weighing platform is arranged in the scale body and forms a first cavity with the scale body. The weighing platform is provided with a pressure transmitting head located in the first cavity. The weighing sensor is arranged in the first cavity and one end is fixed to the scale body through a sensor fixing seat and the other end is in contact with the pressure transmitting head. The scale platform transmits the weight of the coal borne on its upper surface to the weighing sensor through the pressure transmitting head. The weighing sensor generates an electrical signal and transmits it to the control system, and converts it into a corresponding weight reading, thereby obtaining a coal storage quantity value. The density of the coal pile in the cylinder presents a gradient change in the vertical direction and remains consistent in the horizontal direction. Therefore, the pressure from the coal pile at each position of the bottom of the cylinder is the same. It is only necessary to measure the pressure in a limited area on the bottom of the cylinder through the metering and weighing module, and then calculate the total coal storage capacity in the bin according to the bottom area of ​​the cylinder. It is not affected by the coal state. Since the weighing sensor is in a fully sealed environment, it is not affected by the coal state and the bottom environment of the bin. It has high accuracy and reliability. At the same time, it does not change the original structure of the Euro bin and does not affect the normal operation of the Euro bin. At the same time, the metering and weighing module can measure in real time, so the amount of coal entering and leaving the bin can be obtained each time, which is conducive to accurate management of production.

[0026] (2) The scale body and the scale platform of the present invention are two independent structures. When the coal in the cylinder is emptied, it is easy to disassemble and take out the weighing sensor that needs to be repaired and calibrated, or weights can be directly placed on the scale platform to calibrate the accuracy of the weighing device. Calibration and disassembly are simple;

[0027] (3) The present invention sets a plurality of measuring and weighing modules at the bottom of the cylinder, and measures a coal amount through the plurality of measuring and weighing modules respectively, and then performs a comprehensive evaluation, thereby improving the accuracy of the measurement result;

[0028] (4) The present invention can determine the pressure generated by the coal pile at the bottom of the cylinder, thereby knowing the pressure borne by the bottom of the cylinder side wall. When the pressure approaches a limit value, the coal is stopped from entering the warehouse, or the coal is taken out as soon as possible to ensure the safety of the cylinder.

[0029] (5) The upper surface of the weighing platform of the present invention is flush with one end of the opening of the weighing body, a sealing flange is provided at one end of the opening of the weighing body, a flexible seal is provided at the gap between one end of the opening of the weighing body and the upper surface of the weighing platform, the weighing platform pressure plate, the flexible seal and the weighing platform are connected in sequence by bolts, and the weighing body pressure plate, the flexible seal and the sealing flange are connected in sequence by bolts, ensuring that the flexible seal can cover the joint between the weighing platform and one end of the opening of the weighing body to prevent water, gas or coal particles from entering the first cavity;

[0030] (6) The side wall of the weighing platform of the present invention is provided with a supporting protrusion, and the inner wall of the weighing body is provided with an offset groove matching the supporting protrusion. The supporting protrusion is arranged in the offset groove. The offset groove supports the weighing platform through the supporting protrusion, thereby preventing the weight of the coal from directly acting on the flexible seal, thereby causing shear damage and cracking of the flexible seal, thereby improving the service life of the flexible seal;

[0031] (7) The outer wall of the weighing platform of the present invention is evenly provided with a plurality of positioning blocks, and the positioning blocks are kept at a distance of 1 to 3 mm from the inner wall of the weighing body, so as to ensure that the spacing between each side of the weighing platform and the inner wall of the weighing body is equal, thereby avoiding contact between the outer wall of the weighing platform and the inner wall of the weighing body, thereby preventing friction resistance or deformation and extrusion, and affecting the measurement accuracy;

[0032] (8) The weighing sensor of the present invention is cylindrical, and a pressure arc surface matching the end of the pressure transmitting head is provided at the center of the end face of the weighing sensor. The end of the pressure transmitting head contacts the pressure arc surface, ensuring that the pressure transmitting head only applies a vertical downward force to the weighing sensor, thereby ensuring the normal operation of the weighing sensor and improving the measurement accuracy.

[0033] (9) The weighing platform of the present invention is provided with a second cavity to reduce the weight of the weighing platform, and the second cavity is provided with a stiffening rib to improve the rigidity of the weighing platform;

[0034] (10) The scale body of the present invention is provided with a cable box for accessing and fixing the output cable connected to the weighing sensor. The outer wall of the scale body is provided with a cable output line pipe joint, through which the signal line is contacted, the sealing is good, and the water at the bottom of the cylinder is prevented from entering the scale body, and the safety is good;

[0035] (11) The present invention further provides that the scale body is fixed to the bottom of the cylinder body by fixing feet to prevent the scale body from moving;

[0036] (12) The present invention has multiple weighing sensors, which are symmetrically arranged on the scale body to form a stable supporting plane that can fully support the pressure borne by the scale platform and has a stable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the structure of the Euro warehouse;

[0038] Figure 2 It is a structural diagram of the measuring and weighing module;

[0039] Figure 3 This is a schematic diagram of the installation position of the measuring and weighing module;

[0040] Figure 4 It is a schematic diagram of the three-dimensional structure of the scale body;

[0041] Figure 5 It is a schematic diagram of the three-dimensional structure of the weighing platform;

[0042] Figure 6 It is a cross-sectional view of the measuring and weighing module;

[0043] Figure 7 is a schematic diagram of the installation position of the flexible seal;

[0044] Figure 8 It is a schematic diagram of the three-dimensional structure of the weighing sensor;

[0045] Description of the numbers in the figure:

[0046] 1. Cylinder, 2. Feeding port, 3. Warehouse top trestle, 4. Rotating trestle, 5. Walking mechanism, 6. Central telescopic drop tube, 7. Lifting wire rope, 8. Spiral frame, 9. Screw machine, 10. Dust cover of guide chute, 11. A-frame, 12. Central hoisting platform, 13. Central rotating platform, 14. Coal drop hopper, 15. Measuring weighing module, 16. Scale body, 17. Scale platform, 18. Scale platform pressure plate, 19. Scale body pressure plate, 20. Flexible seal, 21. Weighing sensor, 22. Second cavity, 23. Stiffening rib, 16-1. Sealing flange, 16-2. Cable output line pipe joint, 16-3. Sensor fixing seat, 16-4. Cable box, 16-5. First bolt hole, 16-6. Fixed foot, 16-7. Offset groove, 16-8. Sealing bolt hole, 17-1. Support protrusion, 17-2. Pressure transmission head, 17-3. Positioning block, 21-1. Pressure arc surface, 21-2. Output cable, 21-3. Second bolt hole. DETAILED DESCRIPTION

[0047] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0048] A coal storage quantity measuring and weighing device for a coal storage warehouse, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 , including 3 metering weighing modules 15, each metering weighing module 15 includes a scale body 16, a weighing platform 17 and a weighing sensor 21, the scale body 16 and the weighing platform 17 are made of stainless steel, the scale body 16 is a box structure with an opening at one end, and is fixed to the concrete foundation at the bottom of the cylinder 1 by a fixed foot 16-6 arranged on its side wall, the weighing platform 17 is a box structure, and matches the scale body 16, the weighing platform 17 is arranged in the scale body 16, and a first cavity is formed between the scale body 16, the upper surface of the weighing platform 17 is flush with the open end of the scale body 16, the weighing platform 17 is provided with a pressure transmitting head 17-2 located in the first cavity, the weighing sensor 21 is arranged in the first cavity, and one end is fixed to the scale body 16 through a sensor fixing seat 16-3, and the other end is in contact with the pressure transmitting head 17-2;

[0049] When coal is piled up in the cylinder 1, the coal will accumulate on the upper surface of the weighing platform 17. The weighing platform 17 transmits the weight of the coal on its upper surface to the weighing sensor 21 through the pressure transmitting head 17-2. The weighing sensor 21 generates an electrical signal and transmits it to the control system through the signal cable and converts it into a corresponding weight reading.

[0050] The revolving trestle 4 drives the screw machine 9 on the screw frame 8 to rotate, and the coal entering the warehouse from the central telescopic drop pipe 6 is evenly laid layer by layer on the horizontal circular surface of the coal pile. After the coal pile is laid one layer, the screw frame 8 rises a certain distance, and the screw machine 9 on the screw frame 8 moves upward at the same time to meet the requirement of laying again. In this process, the coal does not directly impact the coal pile and does not affect the density of the coal pile. Therefore, the density of the coal pile in the cylinder 1 at the same horizontal height is the same, but as the height of the coal pile continues to increase, the coal in the upper layer will produce a gravity backlog effect on the coal in the lower layer, so the density of the lower layer of coal is greater than that of the upper layer of coal. The density of the coal pile in the cylinder 1 shows a gradient change in the vertical direction, but remains consistent in the horizontal direction;

[0051] Therefore, the pressure from the coal pile at each position on the bottom of the cylinder 1 is the same. It is only necessary to measure the pressure in a limited area on the bottom of the cylinder 1 through the metering and weighing module 15, and then the total coal storage capacity in the bin can be obtained according to the bottom area of ​​the cylinder 1. This method is not affected by the coal state, has high accuracy and reliability, and does not change the original structure of the Euro bin, and does not affect the normal operation of the Euro bin. At the same time, the metering and weighing module 15 can measure in real time, so the amount of coal entering and leaving the bin each time can be obtained, which is conducive to accurate management of production.

[0052] Three measuring and weighing modules 15 are arranged at the bottom of the cylinder 1. The coal quantity is measured by the three measuring and weighing modules 15 respectively, and then a comprehensive evaluation is performed, thereby improving the accuracy of the measurement result.

[0053] The weighing body 16 and the weighing platform 17 are two independent metal structures, which are easy to disassemble and take out the weighing sensor 21 that needs to be repaired and calibrated when the coal in the cylinder 1 is emptied.

[0054] like Figure 7 The device also includes a weighing platform pressure plate 18, a weighing body pressure plate 19 and a flexible seal 20. The weighing platform pressure plate 18 and the weighing body pressure plate 19 are both square ring-shaped. A sealing flange 16-1 is provided at one end of the opening of the weighing body 16. The flexible seal 20 is arranged in the gap between the open end of the weighing body 16 and the upper surface of the weighing platform 17. The weighing platform pressure plate 18, the flexible seal 20 and the weighing platform 17 are connected in sequence by bolts. The weighing body pressure plate 19, the flexible seal 20 and the sealing flange 16-1 are connected in sequence by bolts to ensure that the flexible seal 20 can cover the seam at the open end of the weighing platform 17 and the weighing body 16 to prevent water, gas or coal particles from entering the first cavity, thereby avoiding damage or interference to the components in the first cavity.

[0055] The upper surface of the weighing platform 17 matches the maximum material taking depth of the screw machine 9, that is, the screw machine 9 cannot touch the metering weighing module 15 when it is at the limit position, and maintains a safe distance.

[0056] The flexible seal 20 is a polymer material or rubber with elasticity and ductility, and has the characteristics of stable performance, acid and alkali resistance and water resistance. It does not chemically react with coal or various chemical substances carried by the coal itself, has a long service life, good stability and good sealing.

[0057] A supporting protrusion 17-1 is provided on the side wall of the weighing platform 17, and an offset groove 16-7 matching the supporting protrusion 17-1 is provided on the inner wall of the weighing body 16. The supporting protrusion 17-1 is arranged in the offset groove 16-7. The offset groove 16-7 supports the weighing platform 17 through the supporting protrusion 17-1, so as to prevent the weight of the coal from directly acting on the flexible seal 20, thereby causing shear damage and cracking of the flexible seal 20, thereby improving the service life of the flexible seal 20.

[0058] Eight positioning blocks 17-5 are evenly arranged on the side walls of the weighing platform 17, and two positioning blocks 17-5 are distributed on each side wall of the weighing platform 17. The positioning blocks 17-5 maintain a distance of 1 to 3 mm from the inner wall of the weighing body 16 to ensure that the spacing between each side wall of the weighing platform 17 and the inner wall of the weighing body 16 is equal, avoiding contact between the outer wall of the weighing platform 17 and the inner wall of the weighing body 16, generating friction resistance or deformation and extrusion, and affecting the measurement accuracy.

[0059] Four weighing sensors 21 are arranged in the scale body 16 . The four weighing sensors 21 are arranged at four corners to form a stable supporting plane, which can fully support the pressure borne by the scale platform 17 .

[0060] like Figure 8 The weighing sensor 21 is cylindrical, and a pressure arc surface 21-1 matching the end of the pressure transmitting head 17-2 is provided at the center of the end face of the weighing sensor 21. The end of the pressure transmitting head 17-2 contacts the pressure arc surface 21-1, ensuring that the pressure transmitting head 17-2 only applies a vertical downward force to the weighing sensor 21, thereby ensuring the normal operation of the weighing sensor 21 and improving the measurement accuracy.

[0061] A plurality of second bolt holes 21-3 are evenly and symmetrically provided on the weighing sensor 21, and a plurality of first bolt holes 16-5 matching the second bolt holes 21-3 are evenly and symmetrically provided on the sensor fixing base 16-3. The weighing sensor 21 is fixed to the sensor fixing base 16-3 by hexagon socket bolts passing through the second bolt holes 21-3 and the first bolt holes 16-5, thereby ensuring that the weighing sensor 21 does not move in any direction, thereby improving the measurement accuracy and reliability.

[0062] like Figure 6 A second cavity 22 is provided in the weighing platform 17 to reduce the weight of the weighing platform 17. A stiffening rib 23 is provided in the second cavity 22 to improve the rigidity of the weighing platform 17 and prevent deformation or damage.

[0063] A cable box 16-4 is provided in the scale body 16 for accessing and fixing the output cable 21-2 connected to the weighing sensor 21. A cable output line pipe joint 16-2 is provided on the outer wall of the scale body 16. The signal line is contacted through the cable output line pipe joint 16-2, which has good sealing performance and prevents water from accumulating at the bottom of the cylinder 1 from entering the scale body 16. The safety is good. The cable output line pipe is protected by a metal casing and penetrates into the underground coal conveying corridor through the side wall of the coal hopper 14 to avoid direct drilling at the bottom of the cylinder 1, which may cause structural damage.

[0064] The bottom of the Euro warehouse cylinder 1 is a concrete structure, and a goose soft stone pile is laid on the bottom of the cylinder 1. A drainage pipe is installed in the goose soft stone pile, and the drainage pipe is guided to the underground coal transportation corridor under the Euro warehouse. A permeable cloth is laid on the goose soft stone pile, and coal is piled on top of the permeable cloth. The scale body 16 is fixed on the concrete bottom of the cylinder 1, and the upper surface of the scale platform 17 is perpendicular to the gravity direction of the coal pile.

[0065] The present embodiment proposes a coal storage quantity measuring and weighing device for a coal storage bin, which utilizes the characteristics that the density of the coal pile in the cylinder 1 presents a gradient change in the vertical direction and remains consistent in the horizontal direction. A plurality of measuring and weighing modules 15 are arranged at the bottom of the cylinder 1. The pressure in a limited area on the bottom of the cylinder is measured by the measuring and weighing modules 15, and then the total coal storage quantity in the bin is calculated according to the bottom area of ​​the cylinder 1. The device is not affected by the coal state, has high accuracy and high reliability, and does not change the original structure of the bin, and does not affect the normal operation of the bin. At the same time, the measuring and weighing modules 15 can measure in real time, so the amount of coal entering and leaving the bin each time can be obtained, which is conducive to accurate management of production.

[0066] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A coal storage quantity measuring and weighing device for a coal storage warehouse, characterized in that: The invention comprises a plurality of metering and weighing modules (15), each metering and weighing module (15) comprises a scale body (16), a weighing platform (17) and a weighing sensor (21); the scale body (16) is a box structure with one end open and fixed to the bottom of a cylinder (1) of a Euro warehouse; the weighing platform (17) is a box structure and matches the scale body (16); the weighing platform (17) is arranged in the scale body (16) and forms a first cavity between the weighing platform (17) and the scale body (16); the weighing platform (17) is provided with a pressure transmitting head (17-2) located in the first cavity; the weighing sensor (21) is arranged in the first cavity, and one end is fixed to the scale body (16) through a sensor fixing seat (16-3), and the other end is in contact with the pressure transmitting head (17-2); The upper surface of the weighing platform (17) is flush with the open end of the weighing body (16); It also includes a weighing platform pressure plate (18), a weighing body pressure plate (19) and a flexible sealing member (20); a sealing flange (16-1) is provided at one end of the opening of the weighing body (16); the flexible sealing member (20) is arranged at a gap between the one end of the opening of the weighing body (16) and the upper surface of the weighing platform (17); the weighing platform pressure plate (18), the flexible sealing member (20) and the weighing platform (17) are connected in sequence by bolts; and the weighing body pressure plate (19), the flexible sealing member (20) and the sealing flange (16-1) are connected in sequence by bolts; The side wall of the weighing platform (17) is provided with a supporting protrusion (17-1), the inner side wall of the weighing body (16) is provided with a dislocation groove (16-7) matching the supporting protrusion (17-1), and the supporting protrusion (17-1) is arranged in the dislocation groove (16-7); A second cavity (22) is provided in the weighing platform (17), and a stiffening rib (23) is provided in the second cavity (22).

2. A coal storage quantity measuring and weighing device for a coal storage Euro warehouse according to claim 1, characterized in that: The outer side wall of the weighing platform (17) is evenly provided with a plurality of positioning blocks (17-5).

3. The coal storage quantity measuring and weighing device for coal storage Euro warehouse according to claim 1 is characterized in that: The end surface of the weighing sensor (21) is provided with a pressure-bearing arc surface (21-1) matching the end of the pressure transmitting head (17-2), and the end of the pressure transmitting head (17-2) is in contact with the pressure-bearing arc surface (21-1).

4. The coal storage quantity measuring and weighing device for coal storage Euro warehouse according to claim 1 is characterized in that: A cable box (16-4) is arranged inside the scale body (16), and a cable output line pipe joint (16-2) is arranged on the outer side wall of the scale body (16).

5. The coal storage quantity measuring and weighing device for coal storage Euro warehouse according to claim 1 is characterized in that: The scale body (16) is fixed to the bottom of the cylinder (1) via fixed feet (16-6).

6. The coal storage quantity measuring and weighing device for coal storage Euro warehouse according to claim 1 is characterized in that: The number of the weighing sensors (21) is multiple, and the multiple weighing sensors (21) are symmetrically arranged on the scale body (16).

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