A matrix belt scale online calibration device

Abstract

This invention relates to an online calibration device for a matrix belt scale, comprising a V-shaped bracket, hexagonal socket head caps, lock nuts, fastening screws, an electric push rod, an upper clamping cover, fastening screws, a lower clamping cover, clamping screws, adjusting screws, a positioning bracket, adjusting shims, a circuit breaker, a 24V regulated power supply, an ascending contactor, and a descending contactor. The bottom surface of the electric push rod is placed inside the lower clamping cover, and the electric push rod is fastened to the lower clamping cover with hexagonal socket head caps. The upper clamping cover is fitted into the electric push rod. The upper and lower clamping covers are fixed with seven fastening screws and nuts. Fastening screws are screwed into the threaded holes of the upper clamping cover and tightened. The V-shaped bracket is fitted onto the outside of the upper and lower clamping covers, and the V-shaped bracket and the piston rod of the electric push rod are fastened together with hexagonal socket head caps. The circuit breaker, 24V regulated power supply, ascending and descending contactors, and electric push rod are connected to form a control circuit. This solution has low manufacturing cost, achieves automated operation, saves calibration time, and ensures calibration accuracy.

Description

Technical Field

[0001] This invention relates to a calibration device, specifically an online calibration device for a matrix belt scale, belonging to the field of metrology technology for automobile scales. Background Technology

[0002] Currently, the most common method for moving fine materials is belt conveyor, and these materials are weighed using matrix belt scales. The weighing structure of this scale consists of a steel frame, weight rack, load cells, metering frame, idlers, idler brackets, and protective covers, forming a weighing platform with a weighing accuracy of ±0.5%.

[0003] Matrix belt scales consist of 4-5 connected weighing platforms with 16-20 circular weights. Each calibration requires manual handling to move the weights from their initial position to the calibration position, and then back to their initial position after calibration. This results in a waste of manpower and resources, poses certain safety hazards, and reduces transportation and weighing efficiency. Therefore, a new solution is urgently needed to address these technical problems. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art by providing an online calibration device for matrix belt scales. This technical solution has low manufacturing cost, achieves automated operation, saves calibration time, ensures calibration accuracy, and increases the weighing capacity.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: an online calibration device for a matrix belt scale, characterized in that the calibration device includes a V-shaped bracket 1, an internal hex bolt 2, a lock nut 3, a fastening screw 4, an electric push rod 5, an upper clamping cover 6, a fastening bolt 7, a lower clamping cover 8, a clamping bolt 9, an adjusting bolt 10, a positioning bracket 11, an adjusting shim 12, a circuit breaker 13, a 24V regulated power supply 14, an ascending contactor 15, and a descending contactor 16. The bottom surface of the electric push rod is placed inside the lower clamping cover, and the electric push rod is fastened to the lower clamping cover with an internal hex bolt. The upper clamping cover is fitted into the electric push rod, wherein the upper and lower clamping covers are fixed with 7 fastening bolts and nuts, and the fastening screw is screwed into the threaded hole of the upper clamping cover and tightened. The V-shaped bracket is fitted on the outside of the upper and lower clamping covers, and the V-shaped bracket and the piston rod of the electric push rod are fastened together with an internal hex bolt. The circuit breaker, the 24V regulated power supply, the ascending and descending contactors, and the electric push rod are connected to form a control circuit.

[0006] As an improvement to this invention, the upper and lower clamping covers are securely connected by bolts, and there is a gap between the electric push rod piston rod and the through hole of the upper clamping cover. This prevents friction and damage to the piston rod.

[0007] As an improvement of this invention, the opening of the positioning bracket is controlled at 1-1.5mm to prevent affecting the adjustment of the hanging weight's horizontality. The positioning bracket is a welded component, and its verticality and parallelism are carefully controlled during processing.

[0008] As an improvement of the present invention, the V-shaped bracket of the online calibration device has a specified straightness with the center of the circular hanging weight, which is determined by the position of the positioning bracket on the measuring steel frame.

[0009] As an improvement to the present invention, the installation process of the calibration device is as follows:

[0010] Step 1: Place the bottom of the electric actuator into the lower clamping cover and secure the electric actuator to the lower clamping cover with hex bolts;

[0011] Step 2: Slide the upper clamping cap onto the electric push rod, ensuring the larger hole of the upper clamping cap fits over the protruding part of the electric push rod piston.

[0012] Step 3: Secure the upper and lower clamping covers with 7 fastening bolts and nuts, and screw the fastening screws into the threaded holes of the upper clamping cover and tighten them;

[0013] Step 4: Tighten the anti-loosening bolts on one side of the upper and lower clamping covers.

[0014] Step 5: Fit the V-shaped bracket onto the outside of the upper and lower clamping covers, and secure the V-shaped bracket and the electric push rod piston rod together with hex bolts.

[0015] Step 6: The lifting mechanism is now assembled after the above 5 steps.

[0016] Step 7: Place the assembled lifting mechanism's bottom plane onto the positioning bracket's bearing plane and tighten it with bolts;

[0017] Step 8: Tighten the clamping bolts and adjusting bolts into the threaded holes and through holes on the upper surface of the positioning bracket socket;

[0018] Step 9: The offline assembly of the matrix belt scale online calibration device is now complete.

[0019] Step 10: Connect the circuit breaker, 24V regulated power supply, rising and falling contactors, and electric push rod to form a control circuit.

[0020] As an improvement to the present invention, the calibration process is as follows:

[0021] Step 1: Insert the positioning bracket of the online calibration device into the two measuring steel frames, and then install the clamping bolts, but do not tighten them. Step 2: Move the online calibration device so that the positioning bracket moves on the measuring steel frame. The center of the V-shaped opening of the V-shaped bracket is aligned with the center of the hanging weight above, and the straightness is ≤0.10mm.

[0022] Step 3: Place the spirit level on the upper surface of the positioning bracket, screw in the four adjusting bolts, tighten or loosen the adjusting bolts to ensure that the parallelism between the bearing surface of the positioning bracket and the measuring steel frame meets the requirements (≤0.2mm), and ensure that the perpendicularity between the positioning bracket and the measuring steel frame meets the requirements (≤0.15mm).

[0023] Step 4: Tighten the clamping bolts to secure the calibration device to the measuring steel frame. At the same time, the four adjusting bolts are tightened and locked to secure the installation gap. At this point, the installation and adjustment of the online calibration device on this side is complete.

[0024] Step 5: Install and adjust the online calibration device on the other side of the metering steel frame using the method described above, until the specified accuracy requirements are met.

[0025] Step 6: Connect the power supply to the two electric push rods, press and hold the "up" button, the two V-shaped brackets will rise, the V-shaped openings will contact the surface of the hanging weight, the hanging weight will lift up and separate from the hanging weight bracket, creating a gap.

[0026] Step 7: Use a feeler gauge to measure and record the gap between the two ends of the hanging weight and the hanging weight bracket. Then press and hold the descent button. The two V-shaped brackets of the online calibration device will descend and reset. The two ends of the hanging weight will be firmly mounted on the two hanging weight brackets. The online calibration device with one hanging weight is now complete.

[0027] Step 8: Loosen the two lifting device fastening bolts, place the adjusting shim on the bearing surface of the two positioning brackets, and then tighten the bolts. Step 9: Press and hold the rise button, the two V-shaped brackets will extend, and the hanging weight will be lifted. Use a feeler gauge to measure the separation gap between the two sides of the hanging weight and the contact part of the hanging weight bracket. Ensure that it is between 7-10mm. If it does not meet the requirements, repeat steps 6-9 to ensure the separation gap. Press the fall button to reset the online calibration device, and the hanging weight will be placed on the hanging weight bracket.

[0028] Step 10: Press and hold the "Up" button again to raise the weight to the top. Place the spirit level in the middle of the weight, adjust the level of the weight, and ensure the weight is at its lowest point. Remove the spirit level, press the "Down" button to lower the weight, and reset both lifting devices.

[0029] Step 11: Loosen the fastening bolts, remove the lower side lifting device, add adjusting shims to the bearing surface of the positioning bracket, then reinstall the lifting device fastening bolts, raise the hanging weight, and place a spirit level at the original measuring position of the hanging weight to measure, ensuring that the levelness of the hanging weight is between 0.8-1.5mm. Repeat this process until the levelness requirement is met.

[0030] Step 12: At this point, the installation and accuracy adjustment of the online automatic calibration device for a pair of matrix belt scales are complete. Then, install and adjust the other online automatic calibration devices in place using the same method. Connect the electric push rod in series to the terminals of the up and down buttons to control the synchronous up and down movement of all online automatic calibration devices.

[0031] Step 13: During calibration, the lifting mechanism of the online automatic calibration device is in its initial position, meaning there is a large gap between the V-shaped bracket and the hanging weight, and the measuring steel frame is unloaded. Turn on the belt scale to adjust the zero point.

[0032] Step 14: After the zero-point adjustment is complete, press and hold the up button. The lifting mechanism of the online automatic calibration device will rise, the V-shaped bracket will lift and hang the weights, the weights will separate from the weight bracket, the metering steel frame will bear the load, the load cell will be under load, and the belt scale ballast calibration will begin.

[0033] Step 15: After the belt scale ballast calibration is completed, press and hold the lowering button. The lowering mechanism of the online automatic calibration device will retract, the weight will be firmly pressed onto the weight bracket, and it will separate from the lifting mechanism of the online automatic calibration device. The calibration operation is complete, and the belt scale will stop operating.

[0034] Compared with existing technologies, this invention has the following advantages: 1) This online calibration device is a post-installation design, meeting installation and calibration requirements without affecting the normal operation of the belt scale. 2) This solution reduces the number of calibration shutdowns and restarts, reducing the need for manual lifting of weights. 3) The design of upper and lower clamping covers effectively fixes the electric push rod, preventing corrosion and obstruction from material spillage from the belt scale, and ensuring service life. 4) The fastening screws and anti-loosening bolts ensure stable and secure electric push rod operation, with no external loads affecting vertical lifting. 5) The V-shaped bracket not only serves to lift and hang the weights but also prevents material spillage from entering the piston rod during electric push rod lifting, without affecting operation and providing dust prevention. 6) The positioning bracket in this solution is designed based on the effective space between the belt scale's metering steel frame and the upper and lower belts. Since the height of each set of weight-hanging brackets is inconsistent and the dimensions are difficult to determine, adjusting shims are the best method for finding discrepancies. 7) The positioning bracket's insertion dimensions are difficult to control; adjusting bolts are designed to compensate for machining errors and also allow for quick and convenient adjustment of accuracy. The level adjustment of the hanging weight is to ensure that during the calibration operation when the belt scale is turned on, displacement, asynchronous lifting and lowering, and uneven force on the weighing sensor will occur due to vibration. 8) The level is adjusted with accurate values ​​using measuring instruments. The operation is simple and the adjustment pad is added in a safe and secure position. This automatic calibration device has a simple structure, is easy to operate, and has low investment cost. Attached Figure Description

[0035] Figure 1 A schematic diagram for calibrating an online calibration device;

[0036] Figure 2 This is a schematic diagram of an electric linear actuator;

[0037] Figure 3 This is a schematic diagram of the upper clamping cap;

[0038] Figure 4 This is a schematic diagram of the lower clamping cap;

[0039] Figure 5Schematic diagram of V-shaped bracket;

[0040] Figure 6 This is a schematic diagram of the positioning bracket;

[0041] Figure 7 This is a schematic diagram of the lifting mechanism assembly.

[0042] Figure 8 This is a schematic diagram of the line calibration device assembly;

[0043] Figure 9 This is a control circuit diagram for the online calibration device;

[0044] Figure 10 This is a schematic diagram of an online calibration device installed on a matrix belt scale.

[0045] In the diagram: 1—V-shaped bracket, 2—Hex socket head cap bolt, 3—Anti-loosening nut, 4—Fastening screw, 5—Electric push rod, 6—Upper clamping cover, 7—Fastening screw, 8—Lower clamping cover, 9—Clamping bolt, 10—Adjusting bolt, 11—Positioning bracket, 12—Adjusting shim, 13—Circuit breaker, 14—24V regulated power supply, 15—Rising contactor, 16—Lowering contactor, 17—Level, 18—Hanging weight, 19—Hanging weight bracket, 20—Measuring steel frame, 21—Fixed steel frame, 22—Weighing sensor, 23—Feeler gauge. Detailed implementation method:

[0046] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0047] Example 1: See Figures 1-10An online calibration device for a matrix belt scale includes a V-shaped bracket 1, hexagon socket head cap bolts 2, lock nuts 3, fastening screws 4, an electric push rod 5, an upper clamping cover 6, fastening bolts 7, a lower clamping cover 8, clamping bolts 9, adjusting bolts 10, a positioning bracket 11, adjusting shims 12, a circuit breaker 13, a 24V regulated power supply 14, an ascending contactor 15, and a descending contactor 16. The bottom surface of the electric push rod is placed inside the lower clamping cover, and the electric push rod is connected to the lower clamping cover using hexagon socket head cap bolts. The upper and lower clamping covers are securely connected, with the upper clamping cover fitted into the electric push rod. The upper and lower clamping covers are secured with seven bolts and nuts. The fastening screws are screwed into the threaded holes of the upper clamping cover and tightened. A V-shaped bracket is fitted onto the outside of the upper and lower clamping covers, and the V-shaped bracket and the electric push rod piston rod are securely connected with hex bolts. The circuit breaker, 24V regulated power supply, and rising and falling contactors are connected to the electric push rod to form a control circuit. The upper and lower clamping covers are securely connected with fastening bolts, and there is a gap between the electric push rod piston rod and the through hole of the upper clamping cover. Friction should be avoided to prevent damage to the piston rod. The opening of the positioning bracket's insertion port is controlled at 1-1.5mm to prevent affecting the horizontal adjustment of the hanging weight. The positioning bracket is a welded component; its verticality and parallelism are carefully controlled during processing. The V-shaped bracket of the online calibration device has a specified straightness with the center of the circular hanging weight, determined by the position of the positioning bracket on the measuring steel frame. The installation process of this calibration device is as follows:

[0048] Step 1: Place the bottom of the electric actuator into the lower clamping cover and secure the electric actuator to the lower clamping cover with hex bolts;

[0049] Step 2: Slide the upper clamping cap onto the electric push rod, ensuring the larger hole of the upper clamping cap fits over the protruding part of the electric push rod piston.

[0050] Step 3: Secure the upper and lower clamping covers with 7 fastening bolts and nuts, and screw the fastening screws into the threaded holes of the upper clamping cover and tighten them;

[0051] Step 4: Tighten the anti-loosening bolts on one side of the upper and lower clamping covers.

[0052] Step 5: Fit the V-shaped bracket onto the outside of the upper and lower clamping covers, and secure the V-shaped bracket and the electric push rod piston rod together with hex bolts.

[0053] Step 6: The lifting mechanism is now assembled after the above 5 steps.

[0054] Step 7: Place the assembled lifting mechanism's bottom plane onto the positioning bracket's bearing plane and tighten it with bolts;

[0055] Step 8: Tighten the clamping bolts and adjusting bolts into the threaded holes and through holes on the upper surface of the positioning bracket socket;

[0056] Step 9: The offline assembly of the matrix belt scale online calibration device is now complete.

[0057] Step 10: Press Figure 8 Connect the circuit breaker, 24V regulated power supply, rising and falling contactors, and electric push rod to form a control circuit.

[0058] Example 2: See Figures 1-10 An online calibration device for a matrix belt scale, the calibration process of which is as follows:

[0059] Step 1: Insert the positioning bracket of the online calibration device into the two measuring steel frames, and then install the clamping bolts, but do not tighten them. Step 2: Move the online calibration device so that the positioning bracket moves on the measuring steel frame. The center of the V-shaped opening of the V-shaped bracket is aligned with the center of the hanging weight above, and the straightness is ≤0.10mm.

[0060] Step 3: Place the spirit level on the upper surface of the positioning bracket, screw in the four adjusting bolts, tighten or loosen the adjusting bolts to ensure that the parallelism between the bearing surface of the positioning bracket and the measuring steel frame meets the requirements (≤0.2mm), and ensure that the perpendicularity between the positioning bracket and the measuring steel frame meets the requirements (≤0.15mm).

[0061] Step 4: Tighten the clamping bolts to secure the calibration device to the measuring steel frame. At the same time, the four adjusting bolts are tightened and locked to secure the installation gap. At this point, the installation and adjustment of the online calibration device on this side is complete.

[0062] Step 5: Install and adjust the online calibration device on the other side of the metering steel frame using the method described above, until the specified accuracy requirements are met.

[0063] Step 6: Connect the power supply to the two electric push rods, press and hold the "up" button, the two V-shaped brackets will rise, the V-shaped openings will contact the surface of the hanging weight, the hanging weight will lift up and separate from the hanging weight bracket, creating a gap.

[0064] Step 7: Use a feeler gauge to measure and record the gap between the two ends of the hanging weight and the hanging weight bracket. Then press and hold the descent button. The two V-shaped brackets of the online calibration device will descend and reset. The two ends of the hanging weight will be firmly mounted on the two hanging weight brackets. The online calibration device with one hanging weight is now complete.

[0065] Step 8: Loosen the two lifting device fastening bolts, place the adjusting shim on the bearing surface of the two positioning brackets, and then tighten the bolts. Step 9: Press and hold the rise button, the two V-shaped brackets will extend, and the hanging weight will be lifted. Use a feeler gauge to measure the separation gap between the two sides of the hanging weight and the contact part of the hanging weight bracket. Ensure that it is between 7-10mm. If it does not meet the requirements, repeat steps 6-9 to ensure the separation gap. Press the fall button to reset the online calibration device, and the hanging weight will be placed on the hanging weight bracket.

[0066] Step 10: Press and hold the "Up" button again to raise the weight to the top. Place the spirit level in the middle of the weight, adjust the level of the weight, and ensure the weight is at its lowest point. Remove the spirit level, press the "Down" button to lower the weight, and reset both lifting devices.

[0067] Step 11: Loosen the fastening bolts, remove the lower side lifting device, add adjusting shims to the bearing surface of the positioning bracket, then reinstall the lifting device fastening bolts, raise the hanging weight, and place a spirit level at the original measuring position of the hanging weight to measure, ensuring that the levelness of the hanging weight is between 0.8-1.5mm. Repeat this process until the levelness requirement is met.

[0068] Step 12: At this point, the installation and accuracy adjustment of the online automatic calibration device for a pair of matrix belt scales are complete. Then, install and adjust the other online automatic calibration devices in place using the same method. Connect the electric push rod in series to the terminals of the up and down buttons to control the synchronous up and down movement of all online automatic calibration devices.

[0069] Step 13: During calibration, the lifting mechanism of the online automatic calibration device is in its initial position, meaning there is a large gap between the V-shaped bracket and the hanging weight, and the measuring steel frame is unloaded. Turn on the belt scale to adjust the zero point.

[0070] Step 14: After the zero-point adjustment is complete, press and hold the up button. The lifting mechanism of the online automatic calibration device will rise, the V-shaped bracket will lift and hang the weights, the weights will separate from the weight bracket, the metering steel frame will bear the load, the load cell will be under load, and the belt scale ballast calibration will begin.

[0071] Step 15: After the belt scale ballast calibration is completed, press and hold the lowering button. The lowering mechanism of the online automatic calibration device will retract, the weight will be firmly pressed onto the weight bracket, and it will separate from the lifting mechanism of the online automatic calibration device. The calibration operation is complete, and the belt scale will stop operating.

[0072] In the above method, the electric push rod must be securely fastened in the lower clamping cover to prevent wobbling. The online calibration device must be adjusted with a level before tightening the clamping bolts, and finally, the tightening bolts must be checked for tightness. The maximum stroke of the lifting mechanism is determined based on the placement height of the circular weight, which also determines the design dimensions of the bearing plane of the positioning bracket and the added dimensions of the adjustment shims. During the maximum upward stroke of the lifting mechanism of the online calibration device, the gap between the weight and the weight bracket must be controlled within the specified range. The gap and the levelness of the weight must be adjusted using adjustment shims on the bearing plane of the positioning bracket; operation in other positions is strictly prohibited. When the lifting mechanism retracts and resets, the weight should land smoothly on the weight bracket without significant rolling or displacement. The electric push power cord must be securely bound and must not come into contact with moving objects. Regularly check all fasteners of the online calibration device for looseness.

[0073] Before the implementation of the above solution, the applicant had 11 matrix belt scales, each with 8 weights. Each time the outer casing needed to be opened, two people had to move the weights from their original position on the scale's steel frame to the weighing position on the measuring frame for calibration. This process took at least 2-3 hours and frequently required stopping and starting the scales, constantly moving the circular weights, causing material accumulation and delaying belt transport. During the experimental phase, an online calibration device for the matrix belt scales was implemented, enabling rapid and automatic calibration. This increased material transport capacity, shortened belt scale calibration time, reduced manpower and material costs, and eliminated safety hazards associated with handling.

[0074] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A calibration method for an online calibration device for a matrix belt scale, characterized in that, The calibration device includes a V-shaped bracket, hex socket head cap bolts, lock nuts, fastening screws, an electric actuator, an upper clamping cover, fastening screws, a lower clamping cover, clamping bolts, adjusting screws, a positioning bracket, adjusting shims, a circuit breaker, a 24V regulated power supply, an ascending contactor, and a descending contactor. The bottom of the electric actuator is placed inside the lower clamping cover, and the electric actuator is fastened to the lower clamping cover with hex socket head cap bolts. The upper clamping cover is fitted into the electric actuator. The upper and lower clamping covers are fixed with seven fastening bolts and nuts. Fastening screws are screwed into the threaded holes of the upper clamping cover and tightened. The V-shaped bracket is fitted on the outside of the upper and lower clamping covers, and the V-shaped bracket and the piston rod of the electric actuator are fastened together with hex socket head cap bolts. The circuit breaker, 24V regulated power supply, ascending and descending contactors, and electric actuator are connected to form a control circuit. The calibration process is as follows: Step 1: Insert the positioning bracket of the online calibration device into the two metering steel frames, then install the clamping bolts, but do not tighten them. Step 2: Move the online calibration device so that the positioning bracket moves on the metering steel frame, and align the center of the V-shaped opening of the V-shaped bracket with the center of the hanging weight above, satisfying the straightness ≤0.10mm; Step 3: Place the spirit level on the upper surface of the positioning bracket, screw in the four adjusting bolts, tighten or loosen the adjusting bolts to ensure that the parallelism between the bearing surface of the positioning bracket and the measuring steel frame is ≤0.2mm, and ensure that the perpendicularity between the positioning bracket and the measuring steel frame is ≤0.15mm. Step 4: Tighten the clamping bolts to secure the calibration device to the measuring steel frame. At the same time, the four adjusting bolts are tightened and locked to secure the installation gap. At this point, the installation and adjustment of the online calibration device on this side is complete. Step 5: Install and adjust the online calibration device on the other side of the metering steel frame using the method described above, until the specified accuracy requirements are met. Step 6: Connect the power supply to the two electric push rods, press and hold the "up" button, the two V-shaped brackets will rise, the V-shaped openings will contact the surface of the hanging weight, the hanging weight will lift up and separate from the hanging weight bracket, creating a gap. Step 7: Use a feeler gauge to measure and record the gap between the two ends of the weight and the weight bracket. Then, press and hold the descent button. The two V-shaped brackets of the online calibration device will descend and reset, and the two ends of the weight will be firmly mounted on the two weight brackets. The online calibration device with one weight is now complete. Step 8: Loosen the two lifting device fastening bolts, place the adjusting shims on the bearing surfaces of the two positioning brackets, and then tighten the bolts. Step 9: Press and hold the up button, the two V-shaped brackets will extend, lift the hanging weight, use a feeler gauge to measure the separation gap between the two sides of the hanging weight and the contact part of the hanging weight bracket, and ensure that it is between 7-10mm. If it does not meet the requirements, repeat steps 6-9 to ensure the separation gap, press the down button to reset the online calibration device, and the hanging weight will fall on the hanging weight bracket. Step 10: Press and hold the "Up" button again to raise the weight to the top. Place the spirit level in the middle of the weight, adjust the level of the weight, and ensure the weight is at its lowest point. Remove the spirit level, press the "Down" button to lower the weight, and reset both lifting devices. Step 11: Loosen the fastening bolts, remove the lower side lifting device, add adjusting shims to the bearing surface of the positioning bracket, then reinstall the lifting device fastening bolts, raise the hanging weight, and place a spirit level at the original measuring position of the hanging weight to measure, ensuring that the levelness of the hanging weight is between 0.8-1.5mm. Repeat this process until the levelness requirement is met. Step 12: At this point, the installation and accuracy adjustment of the online automatic calibration device for a pair of matrix belt scales are complete. Then, install and adjust the other online calibration devices in place using the same method. Connect the electric push rod in series to the terminals of the up and down buttons to control the online calibration devices to move up and down synchronously. Step 13: During calibration, the lifting mechanism of the online calibration device is in its initial position, meaning there is a large gap between the V-shaped bracket and the hanging weight, and the measuring steel frame is unloaded. Turn on the belt scale to adjust the zero point. Step 14: After the zero-point adjustment is complete, press and hold the up button. The lifting mechanism of the online calibration device will rise, the V-shaped bracket will lift and hang the weights, the weights will separate from the bracket, the metering steel frame will bear the load, the load cell will be under load, and the belt scale ballast calibration will begin. Step 15: After the belt scale ballast calibration is completed, press and hold the descent button. The descent mechanism of the online calibration device will retract, the weight will be firmly pressed onto the weight bracket, and it will separate from the lifting mechanism of the online calibration device. The calibration operation is complete, and the belt scale will stop operating.

2. The calibration method for the online calibration device of the matrix belt scale according to claim 1, characterized in that, The upper and lower clamping caps are securely connected by bolts, and there is a gap between the electric push rod piston rod and the through hole of the upper clamping cap.

3. The calibration method for the matrix belt scale online calibration device according to claim 2, characterized in that, The opening of the positioning bracket is controlled at 1-1.5mm.

4. The calibration method for the matrix belt scale online calibration device according to claim 3, characterized in that, The V-shaped bracket of the online calibration device has a specified straightness with the center of the circular hanging weight, which is determined by the position of the positioning bracket on the measuring steel frame.

5. The calibration method for the matrix belt scale online calibration device according to claim 4, characterized in that, The installation process for this calibration device is as follows: Step 1: Place the bottom of the electric actuator into the lower clamping cover and secure the electric actuator to the lower clamping cover with hex bolts; Step 2: Slide the upper clamping cap onto the electric push rod, ensuring the larger hole of the upper clamping cap fits over the protruding part of the electric push rod piston. Step 3: Secure the upper and lower clamping covers with 7 fastening bolts and nuts, and screw the fastening screws into the threaded holes of the upper clamping cover and tighten them; Step 4: Tighten the anti-loosening bolts on one side of the upper and lower clamping covers. Step 5: Fit the V-shaped bracket onto the outside of the upper and lower clamping covers, and secure the V-shaped bracket and the electric push rod piston rod together with hex bolts. Step 6: The lifting mechanism is now assembled after the above 5 steps. Step 7: Place the assembled lifting mechanism's bottom plane onto the positioning bracket's bearing plane and tighten it with bolts; Step 8: Tighten the clamping bolts and adjusting bolts into the threaded holes and through holes on the upper surface of the positioning bracket socket; Step 9: The offline assembly of the matrix belt scale online calibration device is now complete. Step 10: Connect the circuit breaker, 24V regulated power supply, rising and falling contactors, and electric push rod to form a control circuit.

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