Electronic belt scale calibration device and system

Abstract

The utility model discloses an electronic belt scale calibration device and system, including installation base frame, elevating support, measure weight and weigh the force frame, weighing module, module mounting bracket and drive mechanism, module mounting bracket fixedly is established on installation base frame, and the cantilever end fixed connection of weighing module is connected to the first end of measure weight and weigh the force frame, and the second end of measure weight and weigh the force frame extends upward and sets up and protrudes from the top surface of installation base frame, and the first end of elevating support is relatively installation base frame and is set up along the vertical movable, and the second end of elevating support extends upward and sets up and protrudes from the top surface of installation base frame, and elevating support is driven along the vertical movement and is positioned through drive mechanism, and then make elevating support higher than the top surface arrangement of measure weight and weigh the force frame or make elevating support lower than the top surface arrangement of measure weight and weigh the force frame. The utility model discloses an electronic belt scale calibration device, can automatically carry out the verification of the weight, realizes the automatic calibration and high verification efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic belt scale equipment, and in particular, to an electronic belt scale calibration device and system. Background Technology

[0002] Electronic belt scales are widely used in industries such as mining, metallurgy, chemical, cement, power, coal, coking, grain, and ports. Utilizing the principle of gravity, electronic belt scales are automatic weighing instruments that continuously weigh bulk materials on a conveyor belt without operator intervention, requiring no subdivision of the material or interruption of the conveyor belt. As a weighing and metering device, electronic belt scales are inevitably affected by various factors during use, including changes in environmental temperature and humidity, vibration, electromagnetic interference, belt tension variations, material adhesion to the belt, and wear and tear on the scale's moving parts. These factors can lead to inaccuracies exceeding the required measurement precision. Therefore, periodic calibration of electronic belt scales is necessary to meet the accuracy requirements of actual applications.

[0003] Existing verification methods for electronic belt scales mainly include physical verification, chain code verification, and hanging code verification. Among these, for example... Figure 1a As shown, physical verification involves repeatedly loading a known weight onto an electronic belt scale and running it continuously. The actual weight is compared with the accumulated weight on the weighing instrument, and the parameters of the weighing instrument are repeatedly adjusted until the accumulated weight matches the actual weight. While physical verification offers the highest accuracy, it requires significant manpower and resources to coordinate the verification of the electronic belt scale. Furthermore, abnormal factors in the intermediate stages (leakage, spillage, sticking, etc.) can significantly impact the accuracy of the verification process. This results in high workload for verification personnel, long downtime for verification, and low efficiency. Figure 1b As shown in the figure, chain code verification is a method that simulates the rolling of a physical object on an electronic belt scale using a standard weight chain code. By comparing the accumulated weight of the chain code with the accumulated amount on the weighing instrument, the parameters of the weighing instrument are repeatedly adjusted until the accumulated weight on the weighing instrument matches the accumulated weight of the chain code. However, chain code verification suffers from low automation. The chain codes are relatively heavy, and factors such as chain code deviation, material adhesion, and placement errors during rolling on the electronic belt scale can all affect verification accuracy. Therefore, chain code verification requires highly skilled operators and a large number of personnel to assist, resulting in low verification efficiency and relatively long downtime for verification. Furthermore, manual loading of the chain codes during calibration often leads to low automation and significant susceptibility to manual operation, resulting in low verification efficiency and long downtime for calibration.

[0004] Therefore, it is necessary to propose an electronic belt scale calibration device to at least solve some of the above-mentioned problems. Utility Model Content

[0005] The electronic belt scale calibration device provided by this utility model solves the technical problem that the existing calibration is difficult to automate and has low efficiency due to the manual hanging of weights.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An electronic belt scale calibration device includes a mounting base, a lifting support, a weighing force application frame, a weighing module, and a module mounting frame. The module mounting frame is fixedly mounted on the mounting base. The first end of the weighing module is fixedly mounted on the module mounting frame, and the second end of the weighing module extends longitudinally and is cantilevered. The first end of the weighing and force-applying frame is fixedly connected to the cantilevered end of the weighing module, and the second end of the weighing and force-applying frame extends upward and protrudes from the top surface of the mounting base. The first end of the lifting bracket is vertically movable relative to the mounting base, and the second end of the lifting bracket extends upward and protrudes from the top surface of the mounting base. It also includes a drive mechanism that is connected to the lifting support, which drives the lifting support to move vertically and position it, thereby making the lifting support higher than the top surface of the weighing and weighing frame or lower than the top surface of the weighing and weighing frame.

[0007] Furthermore, the electronic belt scale calibration device also includes a calibration rod, which is driven by a drive mechanism to move and position the lifting bracket vertically, thereby placing the calibration rod on the lifting bracket or on the weighing and applying force frame.

[0008] Furthermore, the electronic belt scale calibration device also includes a position calibration detector, which is fixedly mounted on the mounting base and faces the lifting bracket. The lifting bracket is equipped with a position sensing element arranged corresponding to the position calibration detector.

[0009] Furthermore, the position calibration detector includes an upper limit sensor and a lower limit sensor arranged at intervals along the height direction, and the lifting bracket is provided with a position sensing element arranged corresponding to the position calibration detector.

[0010] Furthermore, the lifting bracket includes a lifting driven rod and a lifting support. The lifting driven rod is arranged through the top surface of the mounting base and is vertically movable relative to the mounting base. The lifting driven rod is connected to the drive mechanism. The first end of the lifting support is fixed on the extended end of the lifting driven rod, and the second end of the lifting support is provided with an arc-shaped support groove with a top opening.

[0011] Furthermore, the lifting support also includes a sliding guide frame, which includes a fixed mounting plate and a vertical movable guide rod. The fixed mounting plate is fixedly mounted on the mounting base, and the vertical movable guide rod is fixedly mounted on the fixed mounting plate along the vertical direction. The vertical movable guide rod passes through the support bearing plate and is arranged to guide the support bearing plate to move vertically.

[0012] Furthermore, the vertical movable guide rods are connected to the supporting bearing plate through bushings, and multiple vertical movable guide rods are arranged at intervals.

[0013] Furthermore, the lifting support includes a support bearing plate and a support connecting plate. The support connecting plate is fixedly mounted on the extended end of the lifting driven rod and is located on the upper side of the mounting base. Two support bearing plates are longitudinally opposite to each other at both ends of the support connecting plate. The support connecting plate is provided with sliding guide holes for cooperating with the vertical movable guide rod, and the support bearing plate is provided with an arc-shaped support groove.

[0014] Furthermore, the mounting base is provided with clearance holes, and the weighing and measuring force application frame includes support plates arranged longitudinally opposite each other. The support plates are arranged through the clearance holes, the bottom end of the support plates is fixedly connected to the weighing module, and the top end of the support plates extends out of the mounting base. The top end of the support plates is a U-shaped support groove.

[0015] Furthermore, the surface of the calibration rod is recessed with a first annular groove that mates with the arc-shaped support groove and a second annular groove that mates with the U-shaped support groove.

[0016] Furthermore, the drive assembly includes a transmission gearbox, the output end of which is connected to the lifting bracket via a lead screw drive. The drive assembly also includes a drive motor and / or a rotating handwheel, the input end of which is connected to the drive motor and / or the rotating handwheel via a drive drive.

[0017] This utility model also provides an electronic belt scale calibration system, including a power transmission device and the aforementioned electronic belt scale calibration device. Two electronic belt scale calibration devices are arranged laterally opposite each other on both sides of a conveyor belt. The power transmission device includes a power transmission rod, a first coupling, and a second coupling. The two electronic belt scale calibration devices share a common drive mechanism. The input end of the transmission gearbox of the electronic belt scale calibration device on one side of the conveyor belt is connected to a drive motor, and the output end of the transmission gearbox of the electronic belt scale calibration device on one side of the conveyor belt is connected to the first coupling. The input end of the transmission gearbox of the electronic belt scale calibration device on the other side of the conveyor belt is connected to a rotating handwheel, and the output end of the transmission gearbox of the electronic belt scale calibration device on the other side of the conveyor belt is connected to the second coupling. The power transmission rod is located below the conveyor belt and its two ends are connected to the first coupling and the second coupling, respectively.

[0018] Furthermore, it also includes a conveyor roller, with rollers at both ends of the conveyor roller rotatably mounted between two mounting bases. The ends of the rollers of the conveyor roller protrude laterally from the side wall of the mounting base and press against the weighing and balancing force application frame on the corresponding side.

[0019] This utility model also provides a calibration method for an electronic belt scale, used in the aforementioned electronic belt scale calibration system, comprising the following steps: S10, Electronic belt scale tare weight calibration: Prepare for tare weight verification: Disconnect the electronic belt scale from the batching system and run the electronic belt scale under no-load; after reading the signal that the lifting support has risen to the upper limit of the sensor, control the lifting support to stop and send a tare weight verification command to the weighing display instrument. At this time, the lifting support is in the lifting positioning state and the lifting support supports the calibration rod. Perform tare weight verification: Weigh the item and calculate the tare weight value; Repeat the weighing process to obtain multiple tare weight values. Compare the tare weight values ​​and deviations from the multiple tare weight verifications. Complete the tare weight verification operation when the tare weight value is stable and the deviation meets the preset accuracy requirements. S20, Electronic belt scale calibration with weights: Preparation for weight verification: After the tare weight verification is completed, the electronic belt scale controls the lifting bracket to descend until it reaches the lower limit of the sensor. The lifting bracket then stops and is positioned, and a weight verification command is sent to the weighing display instrument. At this time, the lifting bracket is in the lifting and positioning state and the weighing force application frame supports the calibration rod. Perform weight verification: Input the length of the weighing section and the calibrated weight of the calibration rod into the weighing display instrument, start weight verification, and calculate the verification coefficient through the weighing display instrument; Repeat the weight verification process multiple times to obtain the verification coefficient calculated each time. Compare the verification coefficients and deviations from the multiple weight verifications. When the verification coefficients are stable and the deviations meet the preset requirements, complete the weight verification operation and write the verification coefficients into the weighing display instrument for storage. S30, the electronic belt scale has resumed conveying operation: The lifting support is controlled to rise until the upper limit is reached, after which the lifting support stops and is positioned. At this time, the lifting support is in the lifting and positioning state and the lifting support lifts the calibration rod, connecting the electronic belt scale with the batching system.

[0020] This utility model has the following beneficial effects: This utility model discloses an electronic belt scale calibration device, comprising a mounting base, a lifting bracket, a weighing and applying force frame, a weighing module, and a module mounting frame. The module mounting frame is fixedly arranged on the mounting base. The weighing module is cantilevered on one side of the conveyor belt via the module mounting frame. The weighing and applying force frame receives or measures belt pressure and transmits the pressure to the weighing module, ultimately achieving weight measurement or testing based on the weighing module. The device includes a mounting base, a lifting bracket, a weighing and applying force frame, a weighing module, and a module mounting frame. The module mounting frame is fixedly mounted on the mounting base. The first end of the weighing module is fixedly mounted on the module mounting frame, and the second end of the weighing module extends longitudinally and is cantilevered. The first end of the weighing and applying force frame is fixedly connected to the cantilevered end of the weighing module. The second end of the weighing and applying force frame extends upward and protrudes from the top surface of the mounting base. The first end of the lifting bracket is vertically movable relative to the mounting base, and the second end of the lifting bracket extends upward and protrudes from the top surface of the mounting base. The system also includes a drive mechanism connected to the lifting bracket. This drive mechanism drives the lifting bracket to move vertically and position it, allowing it to be positioned either above or below the top surface of the weighing and applying frame. The mounting base does not interfere with the weighing and applying frame. When not connected to the weighing module, the weighing and applying frame is vertically movable relative to the mounting base. When weighing the conveyed weight using the electronic belt scale calibration device, the drive mechanism drives the lifting bracket to rise vertically above and position it above the weighing and applying frame. A calibration rod is mounted on the lifting bracket. When performing automatic calibration using the electronic belt scale calibration device, the drive mechanism drives the lifting bracket to descend vertically below and position it below the weighing and applying frame. The calibration rod is mounted on the weighing and applying frame, and the pressure applied by the calibration rod is transmitted to the weighing module for calibration. This electronic belt scale calibration device can automatically perform calibration, achieving automated calibration with high efficiency.

[0021] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1a This is a schematic diagram of an existing electronic belt scale's physical verification scenario. Figure 1b This is a schematic diagram of a chain code verification scenario for existing electronic belt scales; Figure 2 This is a three-dimensional structural diagram of the first state (verification state) of the electronic belt scale calibration device of this utility model; Figure 3 yes Figure 2 A partial three-dimensional structural diagram; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a three-dimensional structural diagram of the second state (operating state) of the electronic belt scale calibration device of this utility model; Figure 6 This is a schematic diagram of the driving lifting principle in the electronic belt scale calibration device of this utility model; Figure 7 This is a three-dimensional structural diagram of the calibration rod in the electronic belt scale calibration device of this utility model; Figure 8 This is a three-dimensional structural diagram of the electronic belt scale calibration system of this utility model; Figure 9 yes Figure 8 One of the schematic diagrams of a partial three-dimensional structure in the image; Figure 10 yes Figure 8 Partial three-dimensional structural diagram (2); Figure 11 This is a schematic diagram of the power transmission of the electronic belt scale calibration system of this utility model.

[0023] Legend: 100. Electronic belt scale calibration device; 10. Mounting base frame; 20. Lifting bracket; 21. Lifting driven rod; 22. Lifting support; 221. Support bearing plate; 222. Support connecting plate; 23. Sliding guide frame; 231. Fixed mounting plate; 232. Vertical movable guide rod; 233. Bushing; 30. Weighing force application frame; 31. Support force plate; 40. Weighing module; 50. Module mounting frame; 60. Drive mechanism; 61. Transmission gearbox; 62. Drive motor; 63. Rotating handwheel; 70. Calibration rod; 71. First annular groove; 72. Second annular groove; 80. Position calibration detector; 81. Upper limit sensor; 82. Lower limit sensor; 90. Position sensing element; 91. Position adjusting nut; 200. Electronic belt scale calibration system; 300. Power transmission device; 301. Power transmission rod; 302. First coupling; 303. Second coupling; 40. Roller shaft. Detailed Implementation

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 An embodiment of the present invention provides an electronic belt scale calibration device 100, including a mounting base 10, a lifting bracket 20, a weighing and applying force frame 30, a weighing module 40, and a module mounting frame 50. The module mounting frame 50 is fixedly mounted on the mounting base 10. The first end of the weighing module 40 is fixedly mounted on the module mounting frame 50, and the second end of the weighing module 40 extends longitudinally and is cantilevered. The first end of the weighing and applying force frame 30 is fixedly connected to the cantilever end of the weighing module 40, and the second end of the weighing and applying force frame 30... The lifting bracket 20 extends upward and protrudes from the top surface of the mounting base 10. The first end of the lifting bracket 20 is vertically movable relative to the mounting base 10, and the second end of the lifting bracket 20 extends upward and protrudes from the top surface of the mounting base 10. It also includes a drive mechanism 60 that is connected to the lifting bracket 20 for transmission. The drive mechanism 60 drives the lifting bracket 20 to move and position vertically, thereby making the lifting bracket 20 higher than the top surface of the weighing and pressure applying frame 30 or lower than the top surface of the weighing and pressure applying frame 30.

[0029] The electronic belt scale calibration device 100 of this utility model includes a mounting base 10, a lifting bracket 20, a weighing and applying force frame 30, a weighing module 40, and a module mounting frame 50. The module mounting frame 50 is fixedly arranged on the mounting base 10. The weighing module 40 is cantilevered on one side of the conveyor belt via the module mounting frame 50. The weighing and applying force frame 30 receives or measures belt pressure and transmits the pressure to the weighing module 40, ultimately realizing the weighing or testing based on the weighing module 40. The weighing module 40 and the module mounting bracket 50 are provided. The module mounting bracket 50 is fixedly mounted on the mounting base 10. The first end of the weighing module 40 is fixedly mounted on the module mounting bracket 50, and the second end of the weighing module 40 extends longitudinally and is cantilevered. The first end of the weighing and force-applying frame 30 is fixedly connected to the cantilever end of the weighing module 40, and the second end of the weighing and force-applying frame 30 extends upward and protrudes from the top surface of the mounting base 10. The first end of the lifting bracket 20 is vertically movable relative to the mounting base 10, and the second end of the lifting bracket 20 extends upward and protrudes from the top surface of the mounting base 10. The system also includes a drive mechanism 60 connected to the lifting bracket 20. The drive mechanism 60 drives the lifting bracket 20 to move vertically and position it, thereby positioning the lifting bracket 20 above or below the top surface of the weighing and applying frame 30. The mounting base 10 does not interfere with the weighing and applying frame 30. When not connected to the weighing module 40, the weighing and applying frame 30 is vertically movable relative to the mounting base 10. When weighing the conveyed weight using the electronic belt scale calibration device 100, the drive mechanism... The lifting support 20 is driven by the drive mechanism 60 to rise vertically above the weighing and applying force frame 30 and be positioned. The calibration rod 70 is mounted on the lifting support 20. When the electronic belt scale calibration device 100 performs automatic calibration by hanging weights, the lifting support 20 is driven by the drive mechanism 60 to descend vertically below the weighing and applying force frame 30 and be positioned. The calibration rod 70 is mounted on the weighing and applying force frame 30. The pressure applied by the calibration rod 70 is transmitted to the weighing module 40 for calibration. The electronic belt scale calibration device 100 of this utility model can automatically perform weight calibration, realize automated calibration, and has high calibration efficiency.

[0030] Understandably, in this invention, the weighing and applying force frame 30 is not connected to the mounting base 10. When the weighing module 40 is not installed, the weighing and applying force frame 30 is vertically movable relative to the mounting base 10. Therefore, the material pressure or the pressure of the calibration rod 70 can be transmitted to the weighing module 40 based on the weighing and applying force frame 30. The lifting support 20 can be a lifting platform with a linkage structure or a lifting rod platform with a rod-like structure; the drive mechanism 60 can be a drive motor 62, a drive handwheel, or a drive rod, as long as the drive mechanism 60 drives the lifting support 20 to rise or fall and can achieve elevation positioning.

[0031] Furthermore, the electronic belt scale calibration device 100 also includes a calibration rod 70, which is driven by the driving mechanism 60 to move and position the lifting bracket 20 vertically, thereby placing the calibration rod 70 on the lifting bracket 20 or on the weighing and applying frame 30. Understandably, when the lifting bracket 20 is higher than the weighing and applying frame 30, the lifting bracket 20 supports the calibration rod 70; when the lifting bracket 20 is lower than the weighing and applying frame 30, the weighing and applying frame 30 supports the calibration rod 70.

[0032] Please refer to Figure 3 and Figure 4 Furthermore, the electronic belt scale calibration device 100 also includes a position calibration detector 80, which is fixedly mounted on the mounting base 10 and faces the lifting bracket 20. The lifting bracket 20 is provided with a position sensing element 90 arranged corresponding to the position calibration detector.

[0033] Furthermore, the position calibration detector 80 includes an upper limit sensor 81 and a lower limit sensor 82 arranged at intervals along the height direction.

[0034] In a specific embodiment of this utility model, the upper limit sensor 81 and the lower limit sensor 82 are respectively Hall sensors, the position sensing element 90 is a sensing magnet or a sensing iron block, and the driving mechanism 60 is a driving motor 62. When the driving motor 62 drives the lifting bracket 20 to rise, the position sensing element 90 rises synchronously until the position sensing element 90 is aligned with the upper limit sensor 81. At this time, a control signal is sent to control the driving motor 62 to stop. When the driving motor 62 drives the lifting bracket 20 to fall, the position sensing element 90 falls synchronously until the position sensing element 90 is aligned with the lower limit sensor 82. At this time, a control signal is sent to control the driving motor 62 to stop, so that the lifting bracket 20 can move between the upper limit sensor 81 and the lower limit sensor 82 and determine the limit position.

[0035] Optionally, the mounting base 10 adopts an open frame with lateral openings. In one embodiment of the present invention, the open frame is a C-shaped channel steel.

[0036] Please refer to this again. Figure 5 Furthermore, the lifting bracket 20 includes a lifting driven rod 21 and a lifting support 22. The lifting driven rod 21 is arranged through the top surface of the mounting base 10 and is vertically movable relative to the mounting base 10. The lifting driven rod 21 is connected to the drive mechanism 60. The first end of the lifting support 22 is fixedly mounted on the extended end of the lifting driven rod 21, and the second end of the lifting support 22 is provided with an arc-shaped support groove with a top opening.

[0037] Furthermore, the lifting support 20 also includes a sliding guide frame 23, which includes a fixed mounting plate 231 and a vertical movable guide rod 232. The fixed mounting plate 231 is fixedly mounted on the mounting base, and the vertical movable guide rod 232 is fixedly mounted on the fixed mounting plate 231 along the vertical direction. The vertical movable guide rod 232 passes through the support bearing plate 221 and is arranged to guide the support bearing plate 221 to move vertically.

[0038] More preferably, it also includes position adjusting nuts 91. Two position adjusting nuts 91 clamp and fix the position sensing element 90 to the lifting driven rod 21. In the present invention, the upper and lower lifting limits are finely adjusted by adjusting the position of the position adjusting nuts 91, so that the lifting brackets 20 of the electronic belt scale calibration device 100 on both sides of the conveyor belt are aligned in height.

[0039] More preferably, the lifting driven rod 21 is a hydraulically retractable moving rod, an electrically retractable moving rod, or a threaded screw-operated lifting rod.

[0040] Furthermore, the vertical movable guide rods 232 are connected to the support plate 221 through bushings 233, and multiple vertical movable guide rods 232 are arranged at intervals. In a preferred embodiment of this utility model, four vertical movable guide rods 232 are arranged around the support plate 221.

[0041] Please refer to this again. Figure 6 Furthermore, the lifting support 22 includes a support bearing plate 221 and a support connecting plate 222. The support connecting plate 222 is fixedly mounted on the extended end of the lifting driven rod 21 and is located on the upper side of the mounting base 10. Two support bearing plates are arranged longitudinally opposite to each other at both ends of the support connecting plate 222. The support connecting plate 222 is provided with a sliding guide hole for cooperating with the vertical movable guide rod 232. The support bearing plate 221 is provided with an arc-shaped support groove.

[0042] In a preferred embodiment of the present invention, the bottom end of the support plate 221 is a square frame, the top end of the support plate 221 is a U-shaped plate, and one end of the weighing module 40 is housed within the square frame of the support plate 221.

[0043] Furthermore, the mounting base is provided with clearance holes, and the weighing and weighing force application frame 30 includes support plates 31 arranged longitudinally opposite each other. The support plates 31 are arranged through the clearance holes, the bottom end of the support plates 31 is fixedly connected to the weighing module 40, and the top end of the support plates 31 extends out of the mounting base. The top end of the support plates 31 is a U-shaped support groove.

[0044] In a preferred embodiment of the present invention, the bottom end of the supporting plate 31 is a square frame, the top end of the supporting plate 31 is a U-shaped plate, and the other end of the weighing module 40 is housed in the square frame of the supporting plate 31.

[0045] Please refer to this again. Figure 7 Furthermore, the surface of the calibration rod 70 is recessed with a first annular groove 71 that mates with the arc-shaped support groove and a second annular groove that mates with the U-shaped support groove.

[0046] In this invention, the calibration rod 70 is machined with an annular limiting groove, which can effectively solve the problem of axial movement of the calibration rod 70 caused by vibration during the operation of the electronic belt scale. At the same time, during weight calibration, the support plate 31 is inserted into the second annular groove of the calibration rod 70; during non-weight calibration, the lifting support 22 is raised and inserted into the arc-shaped support groove of the calibration rod 70. The axial position of the calibration rod 70 is limited in any state.

[0047] Furthermore, the drive assembly includes a transmission gearbox 61, the output end of which is connected to the lifting bracket 20 via a lead screw drive. The drive assembly also includes a drive motor 62 and / or a rotating handwheel 63, the input end of which is connected to the drive motor 62 and / or the rotating handwheel 63 via a drive connection.

[0048] Please refer to Figure 8 , Figure 9 , Figure 10 and Figure 11This utility model also provides an electronic belt scale calibration system 200, including a power transmission device 300 and the aforementioned electronic belt scale calibration device 100. Two electronic belt scale calibration devices 100 are arranged laterally opposite each other on both sides of a conveyor belt. The power transmission device 300 includes a power transmission rod 301, a first coupling 302, and a second coupling 303. The two electronic belt scale calibration devices 100 share a single drive mechanism 60. The input end of the transmission gearbox 61 of the electronic belt scale calibration device 100 located on one side of the conveyor belt is connected to the drive motor. 62. The output end of the transmission gearbox 61 of the electronic belt scale calibration device 100 located on one side of the conveyor belt is connected to the first coupling 302. The input end of the transmission gearbox 61 of the electronic belt scale calibration device 100 located on the other side of the conveyor belt is connected to the rotating handwheel 63. The output end of the transmission gearbox 61 of the electronic belt scale calibration device 100 located on the other side of the conveyor belt is connected to the second coupling 303. The power transmission rod 301 is located below the conveyor belt and its two ends are connected to the first coupling 302 and the second coupling 303 respectively.

[0049] Furthermore, it also includes a conveying roller, the rollers at both ends of which are rotatably mounted between two mounting bases 10. The ends of the rollers of the conveying roller protrude laterally from the side wall of the mounting base 10 and press against the weighing and balancing force application frame 30 on the corresponding side.

[0050] The electronic belt scale calibration system 200 provided by this utility model uses a drive motor 62 (motor reducer) to drive two transmission gearboxes 61 (screw jacks) synchronously through a flexible power transmission rod 301 and a transmission shaft. This effectively solves the problem of asynchrony caused by separate driving of two motor reducers. At the same time, the screw jacks are connected by a coupling during the lifting process, which effectively solves the jamming phenomenon that occurs during the operation of the screw jacks. Specifically, the position calibration detector 80 is installed in the groove of the mounting base 10 (frame main beam); the weighing and weighing force application frame 30 is installed on the weighing module 40, and the weighing module 40 is fixedly set in the groove of the mounting base 10. The lifting driven rod 21 is flexibly connected to the lifting support 22, the vertical movable guide rod 232 is fixed on the fixed mounting plate 231, and the bushing 233 is fixed on the lifting support 22. The screw jack is driven by the motor reducer to drive the lifting driven rod 21 and the lifting support 22 to move vertically. Two transmission gearboxes 61 are installed in the mounting bases 10 on both sides of the electronic belt scale. There may be a height deviation in the vertical lifting supports 22. The upper and lower limit positions of the lifting supports 22 are adjusted by adjusting the thread depth of the lifting driven rod 21, ensuring that the lifting supports 22 on both sides of the electronic belt scale are at the same height. The position sensor 90 (sensor plate) moves up and down with the lifting driven rod 21, triggering the upper or lower limit of the proximity switch and transmitting the signal from the proximity switch to the control unit. The transmission gearboxes 61 are installed in the slots of the mounting base 10 of the electronic belt scale, which is made of channel steel or processed by bending. During the calibration process, if the motor reducer malfunctions due to an electrical circuit or motor reducer failure, it is necessary to release or reload the load on the calibration rod 70 on the weighing module 40. This can be done manually by rotating the handwheel to release or reload the load, thus completing the calibration work of the electronic belt scale.

[0051] In practical operation, during weight-bearing verification, the calibration rod 70 is placed on the weighing and applying frame 30, and the weight of the calibration rod 70 is transferred to the weighing module 40 through the weighing and applying frame 30; the lifting support 22 does not contact the calibration rod 70, and the position calibration detector detects the lower limit signal. During non-weight-bearing verification, the calibration rod 70 is supported by the lifting support 22, the calibration rod 70 does not contact the weighing and applying frame 30, and the position calibration detector detects the upper limit signal.

[0052] This utility model also provides a calibration method for an electronic belt scale, used in the aforementioned electronic belt scale calibration system 200, comprising the following steps: S10, Electronic belt scale tare weight calibration: Prepare for tare weight verification: Disconnect the electronic belt scale from the batching system and run the electronic belt scale under no-load; after reading the signal that the lifting bracket 20 has risen to the upper limit of the sensing, control the lifting bracket 20 to stop and send a tare weight verification command to the weighing display instrument. At this time, the lifting bracket 20 is in the lifting and positioning state and the lifting bracket 20 supports the calibration rod 70. Perform tare weight verification: Weigh the item and calculate the tare weight value; Repeat the weighing process to obtain multiple tare weight values. Compare the tare weight values ​​and deviations from the multiple tare weight verifications. Complete the tare weight verification operation when the tare weight value is stable and the deviation meets the preset accuracy requirements. S20, Electronic belt scale calibration with weights: Preparation for weight verification: After the tare weight verification is completed, the electronic belt scale controls the lifting bracket 20 to descend until it reaches the lower limit of the sensor. The lifting bracket 20 then stops and is positioned, and a weight verification command is sent to the weighing display instrument. At this time, the lifting bracket 20 is in the lifting and positioning state and the weighing force application frame 30 supports the calibration rod 70. Perform weight verification: Input the weighing section length and the calibrated weight of the calibration rod 70 into the weighing display instrument, start weight verification, and calculate the verification coefficient through the weighing display instrument; Repeat the weight verification process multiple times to obtain the verification coefficient calculated each time. Compare the verification coefficients and deviations from the multiple weight verifications. When the verification coefficients are stable and the deviations meet the preset requirements, complete the weight verification operation and write the verification coefficients into the weighing display instrument for storage. S30, the electronic belt scale has resumed conveying operation: After the lifting support 20 is raised to the upper limit of the sensor, the lifting support 20 stops and is positioned. At this time, the lifting support 20 is in the lifting and positioning state and the lifting support lifts the calibration rod 70, connecting the electronic belt scale with the batching system.

[0053] The specific steps of the electronic belt scale calibration method of this utility model are as follows: Electronic belt scale tare calibration: Preparation for tare weight verification of electronic belt scale: First, the control unit sends a stop signal to the upstream feeding equipment to disconnect the electronic belt scale from the batching system. After the electronic belt scale runs for several revolutions, the weighing display instrument shows a feedback flow of 0, indicating that there is no material on the electronic belt scale. Then, the control unit reads the position signal of the position calibration detector 80. After reading the upper limit signal, the control unit sends a tare weight verification command to the weighing display instrument.

[0054] The electronic belt scale begins tare weight calibration. Upon receiving the tare weight calibration signal, the weighing display instrument enters the tare weight calibration program, calculates the tare weight, and feeds it back to the control unit. The control unit remotely writes the tare weight into the weighing display instrument for storage, and the calibration is repeated multiple times. By comparing the tare weight values ​​and deviations from these multiple calibrations, if the tare weight value is stable and the deviation meets the accuracy requirements of the electronic belt scale, the tare weight calibration operation is complete.

[0055] Electronic belt scale calibration: Preparations before electronic belt scale calibration: After tare weight calibration without stopping the electronic belt scale, the control unit sends a loading signal to the motor reducer. The motor reducer starts and drives the lifting driven rod 21, position adjusting nut 91, lifting support 22, and calibration rod 70 to move downward. The position calibration detector 80 senses the lower limit signal and stops the operation of the motor reducer. At this time, the lifting support 22 is not in contact with the calibration rod 70, and the calibration rod 70 is placed on the weighing force application frame 30.

[0056] Electronic belt scale calibration: The control unit sends a weight calibration command to the weighing display instrument, which then enters the weight calibration procedure. The control unit remotely inputs parameters such as the weighing section length and the weight of the calibration rod (70) to the weighing display instrument to begin the weight calibration. After one weight calibration is completed, the weighing display instrument calculates the calibration coefficient and feeds it back to the control unit, which remotely writes it into the weighing display instrument for storage. This weight calibration is repeated multiple times, and the calibration coefficients and deviations from each calibration are compared. If the calibration coefficients are stable and the deviations meet the accuracy requirements of the electronic belt scale, the weight calibration operation is complete, and the next step is performed.

[0057] After the electronic belt scale is calibrated with weights: The control unit sends a command to the weighing display instrument to exit the weight calibration, and simultaneously sends a weight unloading command to the electric reducer. The electric reducer reverses its operation, driving the transmission gearbox 61, which in turn moves the lifting driven rod 21, position adjusting nut 91, lifting support 22, and calibration rod 70 upwards. The position calibration detector 80 senses the upper limit signal and transmits it to the control unit. The motor reducer stops running, the calibration rod 70 is no longer in contact with the weighing force application frame 30, and the calibration rod 70 is placed on the lifting support 22. The weight calibration of the electronic belt scale is then complete. The electronic belt scale is connected to the batching system, and the control unit sends a signal to start the upstream unloading equipment.

[0058] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A calibration device for an electronic belt scale, characterized in that, This includes the mounting base, lifting support, weighing and applying force frame, weighing module, and module mounting bracket. The module mounting bracket is fixedly mounted on the mounting base. The first end of the weighing module is fixedly mounted on the module mounting bracket. The second end of the weighing module extends longitudinally and is cantilevered. The first end of the weighing and applying force frame is fixedly connected to the cantilevered end of the weighing module. The second end of the weighing and applying force frame extends upward and protrudes beyond the top surface of the mounting base. The first end of the lifting bracket is vertically movably mounted relative to the mounting base. The second end of the lifting bracket extends upward and protrudes beyond the top surface of the mounting base. It also includes a drive mechanism that is connected to the lifting support, which drives the lifting support to move and position vertically, thereby making the lifting support higher than the top surface of the weighing and pressure application frame or lower than the top surface of the weighing and pressure application frame.

2. The electronic belt scale calibration device according to claim 1, characterized in that, The electronic belt scale calibration device also includes a calibration rod, which is driven by the drive mechanism to move and position the lifting bracket vertically, thereby placing the calibration rod on the lifting bracket or on the weighing force application frame.

3. The electronic belt scale calibration device according to any one of claims 1 or 2, characterized in that, The electronic belt scale calibration device also includes a position calibration detector, which is fixedly mounted on the mounting base and faces the lifting bracket. The lifting bracket is provided with a position sensing element arranged corresponding to the position calibration detector.

4. The electronic belt scale calibration device according to claim 3, characterized in that, The position calibration detector includes an upper limit sensor and a lower limit sensor arranged at intervals along the height direction, and the lifting bracket is provided with a position sensing element arranged corresponding to the position calibration detector.

5. The electronic belt scale calibration device according to any one of claims 1 or 2, characterized in that, The lifting support includes a lifting driven rod and a lifting base. The lifting driven rod passes through the top surface of the mounting base and is vertically movable relative to the mounting base. The lifting driven rod is connected to the driving mechanism. The first end of the lifting support is fixed on the extended end of the lifting driven rod, and the second end of the lifting support is provided with an arc-shaped support groove with a top opening.

6. The electronic belt scale calibration device according to claim 5, characterized in that, The lifting support also includes a sliding guide frame, which includes a fixed mounting plate and a vertical movable guide rod. The fixed mounting plate is fixedly mounted on the mounting base, and the vertical movable guide rod is fixedly mounted on the fixed mounting plate. The vertical movable guide rod passes through the support bearing plate and is arranged to guide the support bearing plate to move vertically.

7. The electronic belt scale calibration device according to claim 6, characterized in that, The vertical movable guide rod is connected to the supporting bearing plate through a bushing, and multiple vertical movable guide rods are arranged at intervals.

8. The electronic belt scale calibration device according to any one of claims 1 or 2, characterized in that, The mounting base is provided with clearance holes. The weighing and measuring force application frame includes support plates arranged opposite each other along the longitudinal direction. The support plates are arranged through the clearance hole. The bottom end of the support plates is fixedly connected to the weighing module. The top end of the support plates extends out of the mounting base frame. The top end of the support plates is a U-shaped support groove.

9. The electronic belt scale calibration device according to claim 2, characterized in that, The surface of the calibration rod is recessed with a first annular groove that mates with the arc-shaped support groove and a second annular groove that mates with the U-shaped support groove.

10. An electronic belt scale calibration system, characterized in that, The system includes a power transmission device and an electronic belt scale calibration device as described in any one of claims 1 to 9. Two of the electronic belt scale calibration devices are arranged laterally opposite each other on both sides of a conveyor belt. The power transmission device includes a power transmission rod, a first coupling, and a second coupling. The two electronic belt scale calibration devices share a single drive mechanism. The input end of the transmission gearbox of the electronic belt scale calibration device located on one side of the conveyor belt is connected to the drive motor, and the output end of the transmission gearbox of the electronic belt scale calibration device located on the same side of the conveyor belt is connected to the first coupling. The input end of the transmission gearbox of the electronic belt scale calibration device, located on the other side of the conveyor belt, is connected to the rotating handwheel, and the output end of the transmission gearbox of the electronic belt scale calibration device, located on the other side of the conveyor belt, is connected to the second coupling. The power transmission rod is located below the conveyor belt and its two ends are connected to the first coupling and the second coupling, respectively.

Images