Electronic belt scale verification device

Abstract

The invention discloses an electronic belt scale verification device, system and method, and the device comprises a mounting base frame, a lifting support, a weighing force application frame, a weighing module, a module mounting frame and a driving mechanism, the module mounting frame is fixedly disposed on the mounting base frame, the first end of the weighing force application frame is fixedly connected with the cantilever end of the weighing module, and the second end of the weighing force application frame is fixedly connected with the cantilever end of the weighing module. The second end of the weighing force application frame extends upwards and protrudes out of the top face of the mounting base frame, the first end of the lifting support is movably arranged in the vertical direction relative to the mounting base frame, the second end of the lifting support extends upwards and protrudes out of the top face of the mounting base frame, and the lifting support is driven by the driving mechanism to move in the vertical direction and be positioned. And the lifting bracket is arranged to be higher than the top surface of the weight measuring and weighing force application frame or the lifting bracket is arranged to be lower than the top surface of the weight measuring and weighing force application frame. According to the electronic belt scale verification device, hanging weight verification can be automatically carried out, automatic verification is achieved, and verification efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic belt scale equipment, and in particular to an electronic belt scale calibration device, system and method. Background Art

[0002] Electronic belt scales are widely used in industries such as mining, metallurgy, chemicals, cement, electricity, coal, coking, grain, and ports. Electronic belt scales utilize the principle of gravity and continuously weigh bulk materials on a conveyor belt without requiring operator intervention, subdividing the material being weighed, or interrupting the conveyor belt's motion. As a weighing and metering device, electronic belt scales are subject to numerous factors during use, including changes in ambient temperature and humidity, vibration, electromagnetic interference, changes in belt tension, belt sticking, and wear and tear on the scale's own moving parts. This can inevitably lead to inaccurate weighing and exceeding accuracy requirements. Therefore, electronic belt scales require periodic calibration to meet the accuracy requirements of actual needs.

[0003] The existing electronic belt scale calibration methods mainly include physical calibration, chain code calibration, hanging code calibration and other methods. Figure 1a As shown, physical calibration is a method of loading a physical object of known weight onto an electronic belt scale for multiple continuous runs, comparing the actual weight with the cumulative amount of the weighing display instrument, and correcting the parameters of the weighing display instrument multiple times to make the cumulative amount of the weighing display instrument consistent with the actual weight; although physical calibration has the highest accuracy, it requires a lot of manpower and material resources to coordinate the calibration of the electronic belt scale, and during the calibration process, abnormal factors in the intermediate links (leakage, spillage, sticking, etc.) have a greater impact on the calibration accuracy of the electronic belt scale, the calibration personnel have a high labor intensity, the downtime for calibration is long, and the efficiency is low. Figure 1b As shown in the figure, chain code verification involves simulating the rolling motion of a standard weight chain code on an electronic belt scale. Based on the comparison of the chain code's accumulated weight with the accumulated weight on the weighing instrument, the internal parameters of the weighing instrument are repeatedly corrected to bring the accumulated weight on the weighing instrument into line with the chain code's accumulated weight. Due to the low degree of automation in chain code verification and the relatively heavy weight of the chain code, factors such as chain code deviation, material adhesion, and placement deviation when rolling on the electronic belt scale can affect verification accuracy. Therefore, chain code verification requires high technical skills from operators and requires a large number of personnel for assistance, resulting in low verification efficiency and relatively long downtime for verification. Manual hanging of the chain code is often used for hanging of the chain code, which has a low degree of automation and is significantly affected by manual operation, resulting in low verification efficiency and long downtime for verification.

[0004] In view of this, it is necessary to propose an electronic belt scale calibration device to at least solve some of the above problems. Summary of the Invention

[0005] The electronic belt scale calibration device provided by the present invention solves the technical problems that the existing calibration is performed manually by hanging weights, which makes it difficult to realize automatic calibration and has low calibration efficiency.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] An electronic belt scale calibration device includes a mounting base, a lifting bracket, a weighing and force-applying frame, a weighing module, and a module mounting frame.

[0008] The module mounting frame is fixed on the mounting base, the first end of the weighing module is fixed on the module mounting frame, 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 cantilever end of the weighing module, 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 movably arranged vertically relative to the mounting base, the second end of the lifting bracket extends upward and protrudes from the top surface of the mounting base,

[0009] It also includes a driving mechanism that is transmission-connected to the lifting bracket, which drives the lifting bracket to move and position vertically through the driving mechanism, thereby making the lifting bracket higher than the top surface of the weighing and force-applying frame or making the lifting bracket lower than the top surface of the weighing and force-applying frame.

[0010] Furthermore, the electronic belt scale calibration device also includes a calibration rod, which is driven by a driving mechanism to drive the lifting bracket to move vertically and position the calibration rod so that the calibration rod is placed on the lifting bracket or the calibration rod is placed on the weighing and force application frame.

[0011] Furthermore, the electronic belt scale calibration device also includes a position calibration detector, which is fixed on the mounting base and arranged toward the lifting bracket. The lifting bracket is provided with a position sensing component arranged corresponding to the position detector.

[0012] 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 component arranged corresponding to the position detector.

[0013] Furthermore, the lifting bracket includes a lifting follower rod and a lifting support. The lifting follower rod is arranged through the top surface of the mounting base. The lifting follower rod is movably arranged vertically relative to the mounting base. The lifting follower rod is transmission-connected to the driving mechanism. The first end of the lifting support is fixed on the protruding end of the lifting follower rod, and the second end of the lifting support is provided with an arc-shaped support groove with a top opening.

[0014] Furthermore, the lifting bracket also includes a sliding guide frame, which includes a fixed mounting plate and a vertical movable guide rod. The fixed mounting plate is fixed on the mounting base, and the vertical movable guide rod is vertically fixed 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.

[0015] Furthermore, the vertical movable guiding rod is connected to the supporting bearing plate through a bushing, and a plurality of vertical movable guiding rods are arranged at intervals.

[0016] Furthermore, the lifting support includes a support bearing plate and a support connecting plate. The support connecting plate is fixed on the protruding end of the lifting driven rod and is located on the upper side of the mounting base. The two support bearing plates are arranged at the two ends of the support connecting plate opposite to each other in the longitudinal direction. The support connecting plate is provided with a sliding guide hole for cooperating with the vertical movable guide rod, and the support bearing plate is provided with an arc-shaped support groove.

[0017] Furthermore, an avoidance hole is arranged on the mounting base, and the weighing force frame includes supporting force plates arranged relatively in the longitudinal direction. The supporting force plates are arranged through the avoidance holes, and the bottom end of the supporting force plates is fixedly connected to the weighing module. The top end of the supporting force plates extends out of the mounting base, and the top end of the supporting force plates is a U-shaped support groove.

[0018] Furthermore, the surface of the calibration rod is concavely provided with a first annular groove for cooperating with the arc-shaped support groove and a second annular groove for cooperating with the U-shaped support groove.

[0019] Furthermore, the drive assembly includes a transmission gearbox, the output end of which is transmission-connected to the lifting bracket screw, and the drive assembly also includes a drive motor and / or a rotating handwheel, the input end of which is transmission-connected to the drive motor and / or the rotating handwheel.

[0020] The present invention also provides an electronic belt scale calibration system, comprising a power transmission device and the above-mentioned electronic belt scale calibration device, the two electronic belt scale calibration devices are arranged opposite to each other on both sides of the conveyor belt in the transverse direction, the power transmission device comprises a power transmission rod, a first coupling and a second coupling, wherein the two electronic belt scale calibration devices share a driving 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 the driving motor, 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 the rotating handwheel, 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 respectively connected to the first coupling and the second coupling.

[0021] Furthermore, it also includes a conveying roller, the rollers at both ends of the conveying roller are rotatably mounted between two mounting bases, and the ends of the rollers of the conveying roller are arranged to protrude laterally from the side wall of the mounting base and press on the weight measuring and force applying frame on the corresponding side.

[0022] The present invention also provides an electronic belt scale calibration method, which is used for the above-mentioned electronic belt scale calibration system, comprising the steps of:

[0023] S10, electronic belt scale tare calibration:

[0024] Prepare for tare weight calibration: disconnect the electronic belt scale from the batching system and make the electronic belt scale run without load; after reading the signal that the lifting bracket has risen to the upper limit of the induction, control the lifting bracket to stop and send a tare weight calibration command to the weighing display instrument. At this time, the lifting bracket is in the lifting and positioning state and the lifting bracket is holding the calibration rod;

[0025] Perform tare weight calibration: weigh and calculate the tare weight value;

[0026] Repeat weighing to obtain multiple tare values, compare the tare values and deviations obtained from multiple tare checks, and complete the tare check when the tare value is stable and the deviation meets the preset accuracy requirements;

[0027] S20, electronic belt scale hanging code verification:

[0028] Prepare for weight hanging calibration: After the tare calibration, the electronic belt scale does not stop and controls the lifting bracket to descend until it reaches the lower limit of the induction position, then stops and positions. It sends a weight hanging calibration command to the weighing display instrument. At this time, the lifting bracket is in the lifting and positioning state and the weighing force frame lifts the calibration rod;

[0029] Carry out weight calibration: input the weighing section length and the calibration weight of the calibration rod into the weighing display instrument, start the weight calibration, and calculate the calibration coefficient through the weighing display instrument;

[0030] Repeat the weight calibration multiple times to obtain the calibration coefficient calculated each time, compare the calibration coefficients and deviations of multiple weight calibrations, complete the weight calibration operation when the calibration coefficient is stable and the deviation meets the preset requirements, and write the calibration coefficient into the weighing display instrument for storage;

[0031] S30, the electronic belt scale resumes conveying work:

[0032] The lifting bracket is controlled to rise until the upper limit is sensed and then the lifting bracket stops and is positioned. At this time, the lifting bracket is in the lifting and positioning state and the lifting bracket lifts the calibration rod to connect the electronic belt scale with the batching system.

[0033] The present invention has the following beneficial effects:

[0034] The electronic belt scale calibration device of the present invention includes a mounting base, a lifting bracket, a weighing and force-applying frame, a weighing module and a module mounting frame, wherein the module mounting frame is fixedly arranged on the mounting base, the weighing module is cantilevered on one side of the conveyor belt through the module mounting frame, the weighing and force-applying frame receives the belt pressure or measures the pressure and transmits the pressure to the weighing module, and finally realizes weighing or testing based on the weighing module; by including the mounting base, the lifting bracket, the weighing and force-applying frame, the weighing module and the module mounting frame, the module mounting frame is fixedly arranged on the mounting base, the first end of the weighing module is fixedly arranged on the module mounting frame, 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 cantilever end of the weighing module, 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 movably arranged vertically relative to the mounting base, and the second end of the lifting bracket extends upward and protrudes from the top of the mounting base The surface setting also includes a driving mechanism that is transmission-connected to the lifting bracket, and the driving mechanism drives the lifting bracket to move and position vertically, thereby making the lifting bracket higher than the top surface of the weighing and weighing force frame or making the lifting bracket lower than the top surface of the weighing and weighing force frame. The mounting base does not interfere with the weighing and weighing force frame, and the weighing and weighing force frame is movable vertically relative to the mounting base when it is not connected to the weighing module; when the weight of the conveyed weight is weighed by the electronic belt scale calibration device, the driving mechanism drives the lifting bracket to rise vertically higher than the weighing and weighing force frame and position it, and the calibration rod is mounted on the lifting bracket. When the electronic belt scale calibration device performs automatic hanging weight calibration, the driving mechanism drives the lifting bracket to descend vertically lower than the weighing and weighing force frame and position it, and the calibration rod is mounted on the weighing and weighing force frame, and calibration is performed by transmitting the pressure applied by the calibration rod to the weighing module; the electronic belt scale calibration device of the present invention can automatically perform hanging weight calibration, realize automatic calibration and high calibration efficiency.

[0035] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a 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 improper limitations on the present invention.

[0037] In the attached figure:

[0038] Figure 1a This is a schematic diagram of the physical verification scenario of the existing electronic belt scale. Figure 1bThis is a schematic diagram of the chain code verification scenario of an existing electronic belt scale;

[0039] Figure 2 3D schematic diagram of the first state (calibration state) of the electronic belt scale calibration device of the present invention;

[0040] Figure 3 yes Figure 2 Schematic diagram of some three-dimensional structures;

[0041] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0042] Figure 5 3D schematic diagram of the second state (operating state) of the electronic belt scale calibration device of the present invention;

[0043] Figure 6 This is a schematic diagram of the driving and lifting principle of the electronic belt scale calibration device of the present invention;

[0044] Figure 7 It is a schematic diagram of the three-dimensional structure of the calibration rod in the electronic belt scale calibration device of the present invention;

[0045] Figure 8 It is a schematic diagram of the three-dimensional structure of the electronic belt scale calibration system of the present invention;

[0046] Figure 9 yes Figure 8 One of the partial three-dimensional structure diagrams in;

[0047] Figure 10 yes Figure 8 The second schematic diagram of the partial three-dimensional structure;

[0048] Figure 11 It is a schematic diagram of power transmission of the electronic belt scale calibration system of the present invention.

[0049] Legend:

[0050] 100. Electronic belt scale calibration device; 10. Mounting base; 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 and force-applying frame; 31. Supporting force plate; 40. Weighing module; 50. Module mounting frame; 60. Drive mechanism; 61. Transmission gearbox; 62. Drive motor; 63. Rotating handwheel; 70. Calibration rod;

[0051] 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 adjustment nut;

[0052] 200. Electronic belt scale calibration system; 300. Power transmission device; 301. Power transmission rod;

[0053] 302, first coupling; 303, second coupling; 40, roller shaft. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0056] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] Please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 as well as Figure 7In one embodiment of the present invention, an electronic belt scale calibration device 100 includes a mounting base 10, a lifting bracket 20, a weighing and force-applying 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. 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. The second end of the weighing and force-applying frame 30 is fixedly connected to the cantilever end of the weighing module 40. 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 movably arranged vertically relative to the mounting base 10. 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 driving mechanism 60 that is transmission-connected to the lifting bracket 20. The driving mechanism 60 drives the lifting bracket 20 to move vertically and position, thereby making the lifting bracket 20 higher than the top surface of the weighing and force-applying frame 30 or making the lifting bracket 20 lower than the top surface of the weighing and force-applying frame 30.

[0059] The electronic belt scale calibration device 100 of the present invention includes a mounting base 10, a lifting bracket 20, a weighing and weighing force frame 30, a weighing module 40 and a module mounting frame 50, wherein 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 through the module mounting frame 50, the weighing and weighing force frame 30 receives the belt pressure or measures the pressure and transmits the pressure to the weighing module 40, and finally realizes the weighing or testing based on the weighing module 40; by including the mounting base 10, the lifting bracket 20, the weighing and weighing force frame 30, the weighing module 40 and the module mounting frame 50, the weighing module 40 is fixedly arranged on the mounting base 10, the weighing module 40 is cantilevered on the side of the conveyor belt through the module mounting frame 50, the weighing and weighing force frame 30 receives the belt pressure or measures the pressure and transmits the pressure to the weighing module 40, and finally realizes the weighing or testing based on the weighing module 40; The weighing module 40 and the module mounting frame 50 are fixedly arranged on the mounting base 10. The first end of the weighing module 40 is fixedly arranged on the module mounting frame 50. The second end of the weighing module 40 extends longitudinally and is cantilevered. The first end of the weighing and weighing force application frame 30 is fixedly connected to the cantilever end of the weighing module 40. The second end of the weighing and weighing force application frame 30 extends upward and protrudes from the top surface of the mounting base 10. The first end of the lifting bracket 20 is movably arranged vertically relative to the mounting base 10. The second end of the lifting bracket 20 extends upward and protrudes from the top surface of the mounting base 10. The lifting bracket 20 is provided with a surface, and further includes a driving mechanism 60 that is transmission-connected to the lifting bracket 20. The driving 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 force-applying frame 30 or making the lifting bracket 20 lower than the top surface of the weighing and force-applying frame 30. The mounting base 10 does not interfere with the weighing and force-applying frame 30. When not connected to the weighing module 40, the weighing and force-applying frame 30 is vertically movable relative to the mounting base 10. When the electronic belt scale calibration device 100 is used to weigh the conveyed weight, the driving mechanism 60 is used to drive the lifting bracket 20 to move and position vertically. The structure 60 drives the lifting bracket 20 to rise vertically above the weighing and weighing force frame 30 and position it. The calibration rod 70 is mounted on the lifting bracket 20. When the electronic belt scale calibration device 100 is used to perform automatic calibration of the hanging weight, the driving mechanism 60 drives the lifting bracket 20 to descend vertically below the weighing and weighing force frame 30 and position it. The calibration rod 70 is mounted on the weighing and weighing force frame 30. The pressure applied by the calibration rod 70 is transferred to the weighing module 40 for calibration. The electronic belt scale calibration device 100 of the present invention can automatically perform hanging weight calibration, realize automatic calibration and high calibration efficiency.

[0060] It is understood that in the solution of the present invention, the weighing and force-applying frame 30 is not connected to the mounting base 10. When the weighing module 40 is not arranged, the weighing and force-applying frame 30 is movable vertically relative to the mounting base 10. Thus, the weighing and force-applying frame 30 can transmit the material pressure or the pressure of the calibration rod 70 to the weighing module 40. The lifting bracket 20 can be a lifting platform with a connecting rod structure or a lifting rod platform with a rod-shaped structure; the driving mechanism 60 can be a driving motor 62, a driving handwheel, or a driving rod. As long as the driving mechanism 60 drives the lifting bracket 20 to rise or fall and achieves elevation positioning, it will be sufficient.

[0061] Furthermore, the electronic belt scale calibration device 100 further includes a calibration rod 70. The driving mechanism 60 drives the lifting bracket 20 to move vertically and position the calibration rod 70, thereby placing the calibration rod 70 on the lifting bracket 20 or placing the calibration rod 70 on the weighing and force-applying frame 30. It is understood that when the lifting bracket 20 is higher than the weighing and force-applying frame 30, the lifting bracket 20 supports the calibration rod 70, and when the lifting bracket 20 is lower than the weighing and force-applying frame 30, the weighing and force-applying frame 30 supports the calibration rod 70.

[0062] 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 fixed on the mounting base 10 and arranged toward the lifting bracket 20. The lifting bracket 20 is provided with a position sensing component 90 arranged corresponding to the position detector.

[0063] Furthermore, the position calibration detector 80 includes an upper limit sensor 81 and a lower limit sensor 82 that are spaced apart along the height direction.

[0064] In a specific embodiment of the present invention, the upper limit sensor 81 and the lower limit sensor 82 respectively use Hall sensors, the position sensing component 90 uses an induction magnet or an induction iron block, and the driving mechanism 60 uses a driving motor 62. When the driving motor 62 drives the lifting bracket 20 to rise, the position sensing component 90 rises synchronously until the position sensing component 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 descend, the position sensing component 90 descends synchronously until the position sensing component 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 moves between the upper limit sensor 81 and the lower limit sensor 82 and determines the limit position.

[0065] Optionally, the mounting base 10 adopts an open frame with a lateral opening. In one embodiment of the present invention, the open frame is a C-shaped channel steel.

[0066] Please refer 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. The lifting driven rod 21 is movably arranged vertically relative to the mounting base 10. The lifting driven rod 21 is transmission-connected to the driving mechanism 60. The first end of the lifting support 22 is fixedly provided on the protruding 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.

[0067] Furthermore, the lifting bracket 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 fixed on the mounting base, and the vertical movable guide rod 232 is vertically fixed on the fixed mounting plate 231. 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.

[0068] More preferably, it also includes a position adjustment nut 91. Two position adjustment nuts 91 clamp the position sensing component 90 on the lifting driven rod 21. In the solution of the present invention, the upper limit and lower limit of the lifting are fine-tuned by adjusting the position of the position adjustment nut 91, so as to facilitate the height alignment of the lifting bracket 20 of the electronic belt scale calibration device 100 on both sides of the conveyor belt.

[0069] More preferably, the lifting driven rod 21 is a hydraulically retractable movable rod, an electrically retractable movable rod, or a threaded lifting rod.

[0070] Furthermore, the vertical movable guide rods 232 are connected to the support bearing plate 221 through bushings 233 , and a plurality of vertical movable guide rods 232 are arranged at intervals. In a preferred embodiment of the present invention, four vertical movable guide rods 232 are arranged around the support bearing plate 221 .

[0071] Please refer 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 arranged on the protruding end of the lifting driven rod 21 and is located on the upper side of the mounting base 10. The two support bearing plates are arranged at both ends of the support connecting plate 222 opposite to each other in the longitudinal direction. The support connecting plate 222 is provided with a sliding guide hole for cooperating with the vertical movable guide rod 232, and the support bearing plate 221 is provided with an arc-shaped support groove.

[0072] 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 accommodated in the square frame of the support plate 221.

[0073] Furthermore, an avoidance hole is arranged on the mounting base, and the weighing force frame 30 includes a supporting force plate 31 arranged relatively in the longitudinal direction. The supporting force plate 31 is arranged through the avoidance hole, and the bottom end of the supporting force plate 31 is fixedly connected to the weighing module 40. The top end of the supporting force plate 31 extends out of the mounting base, and the top end of the supporting force plate 31 is a U-shaped support groove.

[0074] In a preferred embodiment of the present invention, the bottom end of the supporting force plate 31 is a square frame, the top end of the supporting force plate 31 is a U-shaped plate, and the other end of the weighing module 40 is accommodated in the square frame of the supporting force plate 31.

[0075] Please refer again Figure 7 Furthermore, the surface of the calibration rod 70 is concavely provided with a first annular groove 71 for cooperating with the arc-shaped support groove and a second annular groove for cooperating with the U-shaped support groove.

[0076] In the solution of the present invention, the calibration rod 70 is processed with an annular limit groove, which can effectively solve the axial movement of the calibration rod 70 caused by the vibration generated during the operation of the electronic belt scale. At the same time, during the hanging weight calibration, the support force plate 31 is inserted into the second annular groove of the calibration rod 70; during the non-hanging weight calibration, the lifting support 22 is lifted 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.

[0077] Furthermore, the drive assembly includes a transmission gearbox 61, the output end of which is connected to the screw rod of the lifting bracket 20, and 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.

[0078] Please refer to Figure 8 、 Figure 9 、 Figure 10 and Figure 11The present invention also provides an electronic belt scale calibration system 200, comprising a power transmission device 300 and the above-mentioned electronic belt scale calibration device 100, wherein the two electronic belt scale calibration devices 100 are arranged on both sides of the conveyor belt in a horizontal direction, and the power transmission device 300 comprises a power transmission rod 301, a first coupling 302 and a second coupling 303, wherein the two electronic belt scale calibration devices 100 share a driving mechanism 60, and the input end of the transmission gearbox 61 of the electronic belt scale calibration device 100 on the conveyor belt side is connected to the drive motor 60. 2 transmission connection, the output end of the transmission gearbox 61 of the electronic belt scale calibration device 100 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 on the other side of the conveyor belt is transmission-connected to the rotating handwheel 63, and the output end of the transmission gearbox 61 of the electronic belt scale calibration device 100 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 respectively connected to the first coupling 302 and the second coupling 303.

[0079] Furthermore, it also includes a conveying roller, the rollers at both ends of the conveying roller are rotatably mounted between the two mounting bases 10, and the ends of the rollers of the conveying rollers are arranged to protrude laterally from the side wall of the mounting base 10 and press on the weighing and force-applying frame 30 on the corresponding side.

[0080] The electronic belt scale calibration system 200 provided by the present invention adopts a driving motor 62 (motor reducer) to drive two transmission gearboxes 61 (screw elevators) to run synchronously through a flexible power transmission rod 301 and a transmission shaft, which can effectively solve the asynchronous problem caused by the two motor reducers driving separately. At the same time, the screw elevator is connected by a coupling during the lifting process, which effectively solves the jamming phenomenon that occurs during the operation of the screw elevator. Specifically, the position calibration detector 80 is installed in the groove of the mounting base 10 (frame main beam); the weighing and 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 follower 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 motor reducer drives the screw elevator to drive the lifting follower rod 21 and the lifting support 22 to run along the vertical straight line. Two transmission gearboxes 61 are installed in the mounting base 10 on both sides of the electronic belt scale. There may be height deviations in the vertical direction of the lifting support 22. The upper and lower limit positions of the lifting support 22 are adjusted by adjusting the thread depth of the lifting follower rod 21 so 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 follower rod 21, triggering the upper limit or lower limit of the proximity switch and transmitting the signal of the proximity switch to the control unit. The transmission gearbox 61 is installed in the groove of the mounting base 10 of the electronic belt scale. The mounting base 10 is made of channel steel or bent. During the calibration process, if the motor reducer fails due to a fault in the electrical circuit or the motor reducer, it is necessary to release and load the load on the calibration rod 70 on the weighing module 40. The load can be released and loaded by manually rotating the handwheel to complete the calibration of the electronic belt scale.

[0081] During calibration with a weight attached, the calibration rod 70 is placed on the weighing and force application frame 30. The weight of the calibration rod 70 is transferred to the weighing module 40 through the weighing and force application frame 30. The lifting support 22 is not in contact with the calibration rod 70, and the position detector detects a lower limit signal. During calibration without a weight attached, the calibration rod 70 is held up by the lifting support 22, and the calibration rod 70 is not in contact with the weighing and force application frame 30. The position detector detects an upper limit signal.

[0082] The present invention also provides an electronic belt scale calibration method, which is used in the above-mentioned electronic belt scale calibration system 200, comprising the steps of:

[0083] S10, electronic belt scale tare calibration:

[0084] Prepare for tare weight verification: disconnect the electronic belt scale from the batching system and make the electronic belt scale run without load; after reading the signal that the lifting bracket 20 has risen to the upper limit of the induction, 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 is holding the calibration rod 70;

[0085] Perform tare weight calibration: weigh and calculate the tare weight value;

[0086] Repeat weighing to obtain multiple tare values, compare the tare values and deviations obtained from multiple tare checks, and complete the tare check when the tare value is stable and the deviation meets the preset accuracy requirements;

[0087] S20, electronic belt scale hanging code verification:

[0088] Prepare for weight hanging calibration: After the tare calibration, the electronic belt scale does not stop and controls the lifting bracket 20 to descend until the lower limit is sensed, after which the lifting bracket 20 stops and is positioned. A weight hanging calibration instruction 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 frame 30 lifts the calibration rod 70;

[0089] Perform weight calibration: input the weighing section length and the calibration weight of the calibration rod 70 into the weighing display instrument, start the weight calibration, and calculate the calibration coefficient through the weighing display instrument;

[0090] Repeat the weight calibration multiple times to obtain the calibration coefficient calculated each time, compare the calibration coefficients and deviations of multiple weight calibrations, complete the weight calibration operation when the calibration coefficient is stable and the deviation meets the preset requirements, and write the calibration coefficient into the weighing display instrument for storage;

[0091] S30, the electronic belt scale resumes conveying work:

[0092] The lifting bracket 20 is controlled to rise until the upper limit is sensed and then the lifting bracket 20 stops and is positioned. At this time, the lifting bracket 20 is in a lifting and positioning state and the lifting bracket lifts the calibration rod 70 to connect the electronic belt scale with the batching system.

[0093] The electronic belt scale calibration method of the present invention includes the following specific steps:

[0094] Electronic belt scale tare calibration:

[0095] Preparation for tare weight calibration of electronic belt scale: first, the control unit sends a stop signal to the upstream unloading equipment, and the electronic belt scale is disconnected from the batching system. After the electronic belt scale runs for several circles alone, the weighing display instrument shows that the feedback flow is 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 calibration instruction to the weighing display instrument.

[0096] The electronic belt scale begins tare verification. After receiving the tare verification signal, the weighing display enters the tare verification process and calculates the tare value. The weighing display feeds the tare value back to the control unit, which remotely writes it to the weighing display and stores it. Tare verification is repeated multiple times. The tare values and deviations from these multiple tare verifications are compared, and the tare verification operation is complete when the tare value is stable and the deviation meets the accuracy requirements of the electronic belt scale.

[0097] Electronic belt scale hanging code verification:

[0098] Preparation work before weight calibration of electronic belt scale: When the electronic belt scale does not stop after tare calibration, the control unit sends a weight loading signal to the motor reducer, and the motor reducer starts to drive the lifting driven rod 21, position adjustment 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 frame 30.

[0099] Electronic belt scale hanging code verification:

[0100] The control unit sends a weight calibration command to the weighing display, which then enters the weight calibration routine. The control unit remotely inputs parameters such as the weighing section length and the weight of the calibration rod 70° into the weighing display, initiating weight calibration. After completing a weight calibration, the weighing display calculates the calibration coefficient, which is fed back to the control unit, which remotely writes it to the weighing display for storage. Repeat the weight calibration multiple times, comparing the calibration coefficients and deviations from these multiple weight calibrations. If the calibration coefficient is stable and the deviation meets the accuracy requirements of the electronic belt scale, the weight calibration operation is complete and the next step can be performed.

[0101] After the electronic belt scale hanging code verification is completed:

[0102] The control unit sends a command to exit the weight verification process to the weighing display and simultaneously sends a command to the electric reducer to unload the weight. The electric reducer reverses and drives the transmission gearbox 61, driving the driven lifting rod 21, the position adjustment nut 91, the lifting support 22, and the calibration rod 70 upward. The position calibration detector 80 senses the upper limit signal and transmits it to the control unit, stopping the motor reducer. The calibration rod 70 is no longer in contact with the weighing force frame 30 and is placed on the lifting support 22. The weight verification process for the electronic belt scale is complete. The electronic belt scale is connected to the batching system and sends a start signal to the upstream unloading equipment through the control unit.

[0103] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electronic belt scale calibration device, characterized in that: Including mounting base, lifting bracket, weighing and force application frame, weighing module and module mounting frame, The module mounting frame is fixed on the mounting base, the first end of the weighing module is fixed on the module mounting frame, 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 cantilever end of the weighing module, 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 movably arranged vertically relative to the mounting base, the second end of the lifting bracket extends upward and protrudes from the top surface of the mounting base, It also includes a driving mechanism that is transmission-connected to the lifting bracket, and the driving mechanism drives the lifting bracket to move and position vertically, thereby making the lifting bracket higher than the top surface of the weighing and force-applying frame or making the lifting bracket lower than the top surface of the weighing and force-applying 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 driving mechanism to drive the lifting bracket to move vertically and position the calibration rod so that the calibration rod is placed on the lifting bracket or on the weighing and 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 further comprises a position calibration detector, which is fixed on the mounting base and disposed toward the lifting bracket. The lifting bracket is provided with a position sensing element arranged corresponding to the position 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 member arranged corresponding to the position detector.

5. The electronic belt scale calibration device according to any one of claims 1 or 2, characterized in that: 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. The lifting driven rod is movably arranged vertically relative to the mounting base. The lifting driven rod is in transmission connection with the driving mechanism. The first end of the lifting support is fixedly arranged on the protruding end of the lifting driven rod. The second end of the lifting support is provided with an arc-shaped supporting groove with an open top.

6. The electronic belt scale calibration device according to claim 5, characterized in that: The lifting bracket also includes a sliding guide frame, which includes a fixed mounting plate and a vertical movable guide rod. The fixed mounting plate is fixed on the mounting base, and the vertical movable guide rod is vertically fixed 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 any one of claims 1 or 2, characterized in that: The mounting base is provided with avoidance holes. The weighing and force-applying frame includes supporting force plates arranged relatively longitudinally, the supporting force plates are arranged through the avoidance holes, the bottom ends of the supporting force plates are fixedly connected to the weighing modules, the top ends of the supporting force plates extend out of the mounting base, and the top ends of the supporting force plates are U-shaped support grooves.

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

9. An electronic belt scale calibration system, characterized in that: The invention comprises a power transmission device and an electronic belt scale calibration device according to any one of claims 1 to 8, wherein the two electronic belt scale calibration devices are arranged opposite to each other on both sides of the conveyor belt in a transverse direction, the power transmission device comprises a power transmission rod, a first coupling and a second coupling, wherein the two electronic belt scale calibration devices share a driving 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 the 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 the 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. It also includes a conveying roller, the rollers at both ends of the conveying roller are rotatably mounted between two mounting bases, and the ends of the rollers of the conveying roller are arranged to protrude laterally from the side wall of the mounting base and press on the weight measuring and force applying frame on the corresponding side.

10. A method for calibrating an electronic belt scale, characterized in that: The electronic belt scale calibration system according to claim 9 comprises the steps of: S10, electronic belt scale tare calibration: Prepare for tare weight calibration: disconnect the electronic belt scale from the batching system and make the electronic belt scale run without load; after reading the signal that the lifting bracket has risen to the upper limit of the induction, control the lifting bracket to stop and send a tare weight calibration command to the weighing display instrument. At this time, the lifting bracket is in the lifting and positioning state and the lifting bracket is holding the calibration rod; Perform tare weight calibration: weigh and calculate the tare weight value; Repeat weighing to obtain multiple tare values, compare the tare values and deviations obtained from multiple tare checks, and complete the tare check when the tare value is stable and the deviation meets the preset accuracy requirements; S20, electronic belt scale hanging code verification: Prepare for weight hanging calibration: After the tare calibration, the electronic belt scale does not stop and controls the lifting bracket to descend until it reaches the lower limit of the induction position, then stops and positions. It sends a weight hanging calibration command to the weighing display instrument. At this time, the lifting bracket is in the lifting and positioning state and the weighing force frame lifts the calibration rod; Carry out weight calibration: input the weighing section length and the calibration weight of the calibration rod into the weighing display instrument, start the weight calibration, and calculate the calibration coefficient through the weighing display instrument; Repeat the weight calibration multiple times to obtain the calibration coefficient calculated each time, compare the calibration coefficients and deviations of multiple weight calibrations, complete the weight calibration operation when the calibration coefficient is stable and the deviation meets the preset requirements, and write the calibration coefficient into the weighing display instrument for storage; S30, the electronic belt scale resumes conveying work: The lifting bracket is controlled to rise until the upper limit is sensed and then the lifting bracket stops and is positioned. At this time, the lifting bracket is in the lifting and positioning state and the lifting bracket lifts the calibration rod to connect the electronic belt scale with the batching system.

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