A calibration device and adjustment method for overload detection and weighing system of a sling-type container

Abstract

The present invention relates to a calibration device for a sling-type container overload detection and weighing system, comprising a trolley, a power supply system, a data display and an elevator installed on the trolley, a calibration unit installed on the elevator, and a hydraulic jack. The upper part of the hydraulic jack acts on a bottom plate of a rotating lock box through a calibration sensor and a force transmission bracket, and the reaction force of the hydraulic jack acts on the overload and weighing sensor through a left lining plate, a right lining plate, a lock pin buckle plate, a lock pin and a circular main shaft. The present invention solves the problem that traditional standard weights can only calibrate the total weight of a container but cannot calibrate the overload of the container.

Description

Technical Field

[0001] The invention relates to a weighing and calibration device and method, and in particular to a calibration device and a calibration method for an overload and eccentric load detection and weighing system of a sling-type container. Background Art

[0002] Overload detection and weighing of containers is a new type of measurement safety testing equipment that has only appeared in recent years. Existing manufacturers and inspection agencies still use traditional weight inspection and debugging methods, but the actual situation cannot meet the technical requirements of their products. Taking the container eccentricity data as an example, X=A / 2-(Fc+Fa)A / G; Y=B / 2-(Fc+Fd)B / G, such as Figure 7 As shown in the figure, it can be seen that the container load must be evenly distributed in the container, otherwise the measured Fa, Fb, Fc, and Fd are not equal, and calibration and debugging cannot be performed (tens of tons of weights in the container cannot meet the uniform placement requirements for sure). Therefore, the factory inspection and debugging of the product are all rough estimates, and the inspection agency can only perform weight measurement. The eccentric and unbalanced load tests are all marked in the factory manual. However, the safe transportation of containers requires the measurement of two indicators: overweight and unbalanced load. The present invention completely solves this problem. Summary of the invention

[0003] In view of the fact that there is no container calibration device at present, the present invention provides a professional calibration system and adjustment method.

[0004] The present invention is achieved through the following technical solutions:

[0005] A calibration device for an over-eccentric load detection and weighing system of a sling-type container comprises a trolley, an elevator, a power supply system, a data display, and a calibration device. The trolley is equipped with a power supply system, a data display, and an elevator. The elevator is equipped with a calibration unit. The calibration unit comprises a rotary lock box bottom plate, a locking pin, a circular main shaft, a first thrust block, a second thrust block, an over-eccentric load and weighing sensor, a spherical bump, a retaining ring, a locking nut, a turntable support seat, a hydraulic jack, a ball seat, a force-bearing steel ball, a calibration sensor, and a force transmission bracket.

[0006] A circular hole is provided at the center of the bottom plate of the rotary lock box, and a first thrust block is installed in the circular hole. A cylindrical boss is provided on the upper part of the first thrust block, and a first through hole is provided in the center of the first thrust block. A second thrust block and an over-eccentric load and weighing sensor are provided above the first thrust block. A second through hole is provided in the center of the second thrust block, and the cylindrical boss on the upper part of the first thrust block is installed in the second through hole. A first spherical groove is provided on the upper part of the second thrust block, and an over-eccentric load and weighing sensor are installed in the first spherical groove. A third through hole is provided in the center of the over-eccentric load and weighing sensor, and a second spherical groove is provided on the upper part of the over-eccentric load and weighing sensor, and a spherical bump is installed in the spherical groove. A fourth through hole is provided in the center of the spherical bump. The lower end of the circular main shaft is arranged according to The locking nut is connected to the upper end of the circular main shaft by a threaded connection; the locking pin is connected to the turntable support seat, and a hydraulic jack is installed in the turntable support seat, and a ball seat, a force-bearing steel ball, a calibration sensor, and a force transmission bracket are installed above the hydraulic jack in sequence, and the force-bearing steel ball is placed in the ball seat, and the calibration sensor is located between the force transmission bracket and the force-bearing steel ball. Under the action of the hydraulic jack, the ball seat and the force-bearing steel ball press the calibration sensor against the lower end of the force transmission bracket, and the upper end of the force transmission bracket is in close contact with the bottom plate of the rotary lock box.

[0007] Furthermore, the turntable support seat includes a locking pin buckle plate, a left lining plate, a right lining plate, and a jack mounting plate. A first square hole for the locking pin to pass through and a square groove for positioning the locking pin are provided in the center of the locking pin buckle plate. The square groove is located below the first square hole and is perpendicular to the first square hole. Four sliding holes are provided on the four corners of the locking pin buckle plate. The bottom of the locking pin buckle plate is vertically connected to the left lining plate and the right lining plate. The bottom ends of the left lining plate and the right lining plate are fixedly connected to the jack mounting plate. The jack mounting plate is located directly below the locking pin buckle plate, and the jack mounting plate is arranged parallel to the locking pin buckle plate.

[0008] Furthermore, a plurality of adjustment handles are installed on the edge of the locking pin buckle plate by welding or threaded connection.

[0009] Furthermore, the force transfer bracket includes a top plate, a sensor fixing plate, and a sliding rod. Four sliding rods are installed on the four corners of the sensor fixing plate. The four sliding rods are respectively connected to the top plate located at the top of the sliding rod through four sliding holes on the four corners of the locking pin buckle plate. A second square hole is provided in the center of the top plate, and the size of the second square hole is adapted to the locking pin.

[0010] Furthermore, the trolley is also equipped with an A / D converter, a communication interface, and a printer interface. The data display uses a TFT color touch screen, and the display contents of the data display include the four-corner force values ​​Fa, Fb, Fc, Fd, the x-axis direction offset, and the y-axis direction offset.

[0011] A method for debugging a calibration device for a spreader-type container overload detection and weighing system comprises the following steps:

[0012] Step 1: Move the calibration device of the overload detection and weighing system of the spreader container to the bottom of the four rotary locks of the container spreader;

[0013] Step 2: Use a lift to slowly raise the verification unit to the bottom plate of the rotation pin box, pass the lock pin through the second square hole in the center of the top plate and the first square hole in the center of the lock pin buckle plate, rotate 90 degrees and position it in the square groove of the lock pin buckle plate, so that the verification unit is suspended on the lock pin;

[0014] Step 3: The lift descends and resets, and the hydraulic jack in the verification unit is started to pressurize. The hydraulic jack generates a downward reaction force F4 on the jack mounting plate. At the same time, the hydraulic jack generates an upward force F2 on the ball seat, the force-bearing steel ball and the verification sensor. According to the principle that the action force is equal to the reaction force, it can be seen that F4=F2. The action force F2 is transmitted through the sensor fixing plate, the slide bar and the top plate to act on the bottom plate of the rotary lock box and the bottom surface of the first thrust block, forming an upward force F1 on the bottom plate of the rotary lock box and the first thrust block. It can be seen that F1=F2. The reaction force F4 on the jack mounting plate acts on the lock pin through the left lining plate, the right lining plate and the lock pin buckle plate. This downward force acting on the lock pin then acts on the overload and weighing sensor through the circular main shaft connected to the lock pin, forming a downward force F3 on the overload and weighing sensor. It can be seen that F3=F4. Since F4=F2 and F1= F2, so the magnitude of the force F3 acting on the overload and weighing sensor is equal to the force F2 acting on the calibration sensor;

[0015] Step 4: According to the principle that action force equals reaction force, read the display data of overload and weighing sensor, and compare and convert it with the display value of the calibration sensor;

[0016] Step 5: The four rotary locks on the four corners of the container are operated simultaneously to truly and accurately measure the total weight G of the container, the X-axis offset and the Y-axis offset, such as Figure 8 As shown in the figure, Fa, Fb, Fc, and Fd are the weights of the four corners of the container, and X and Y are the offsets of the center of gravity of the container in the X-axis and Y-axis directions respectively:

[0017] A=5850mm (20-foot box) or 11985mm (40-foot box)

[0018] B=2259mm (20ft / 40ft box width is the same)

[0019] Total weight G = Fa + Fb + Fc + Fd

[0020] X (axis direction offset) = A / 2-(Fc+Fa)A / G

[0021] Y (axis direction offset) = B / 2-(Fc+Fd)B / G

[0022] Verification results can be automatically output / displayed / printed / remotely communicated, etc.

[0023] Step 6: Multi-point loading calibration. Select any loading pressure value through the calibration device, observe the reading of the calibration device and compare and convert it with the display value of the container overload detection and weighing system, so as to obtain the error of the measured system and realize its calibration function.

[0024] The present invention has the following beneficial technical effects:

[0025] The container spreader type eccentric load detection and weighing system detects containers. The total weight can be detected by general weighing instruments such as electronic crane scales or truck scales, but the eccentricity detection cannot be achieved with traditional weighing equipment. Even if standard weights are stacked in the box, accurate and uniform stacking cannot be achieved. If the standard weights in the box cannot be evenly distributed, the weights at the four corners of the container cannot be accurately measured, let alone the eccentricity measurement. Currently, weights are stacked in the box for calibration and verification. The system has large distortion and cannot meet market requirements.

[0026] The present invention pioneered a force-adding structure and adjustment method for a calibration device, which include the following three aspects: first, selection of a force-bearing position; second, innovation of a force-bearing structure between the lower portion of a sling rotary lock box bottom plate and a lock pin and a lock pin buckle plate; and third, finding the corresponding relationship between the action force and reaction force of the calibration device and the original container overload and eccentric load detection and weighing system. The step surfaces on both sides of a connection between the lock pin and the circular main shaft are cleverly used as support force surfaces, and at the same time, a sliding rod is used to transmit the upward action of the hydraulic jack to the bottom plate of the rotary lock box. At the same time, the downward reaction force of the hydraulic jack acts on the lock pin buckle plate through the left lining plate and the right lining plate, and a downward pulling force is formed on the step surfaces on both sides of a connection between the lock pin and the circular main shaft through the lock pin buckle plate, and then transmitted to the overload and weighing sensor through the circular main shaft. The corresponding relationship between the action force and the reaction force is utilized to realize a new calibration system and adjustment method.

[0027] The present invention utilizes the force interval and force structure between the two side steps of the connection between the lock pin and the circular main shaft, the bottom plate of the rotary lock box, and the bottom plate of the jack, and according to the principle of force transmission, equal action force and reaction force, the user or the inspection agency can arbitrarily select the force value through the force device, observe the reading of the verification system and the structure displayed by the container overload detection and weighing system for comparison and conversion, so as to obtain the error of the measured system and realize its verification function. The present invention fills the gap of this technology at home and abroad. At the same time, the device has a simple, novel and practical structure, is easy to use, and has high working efficiency. It can realize verification within the full range, providing a complete set of verification devices for the safe transportation of containers, ensuring that the detection data of the containers are true and reliable, and escorting safe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the verification unit in the present invention.

[0030] Figure 3 It is a front view of the force transfer bracket in the present invention.

[0031] Figure 4 It is a top view of the force transfer bracket in the present invention.

[0032] Figure 5 It is the front view of the turntable support seat in the present invention.

[0033] Figure 6 It is a top view of the turntable support seat in the present invention.

[0034] Figure 7 This is a schematic diagram of the container forces.

[0035] Figure 8 This is a schematic diagram of the container forces during calibration.

[0036] Fig. 9 Schematic diagram of container forces when unevenly loaded.

[0037] In the attached drawings: 1—trolley, 2—power system, 3—data display, 4—elevator, 5—turntable support seat, 501—locking pin buckle plate, 502—left lining plate, 503—right lining plate, 504—jack mounting plate, 505—first square hole, 506—square groove, 507—sliding hole, 6—force transmission bracket, 601—sensor fixing plate, 602—sliding rod, 603—top plate, 604—second square hole, 7—hydraulic jack, 8—ball seat, 9—force bearing steel ball, 10—calibration sensor, 11—adjustment handle, 12—locking pin, 13—turn lock box bottom plate, 14—first thrust block, 15—cylindrical boss, 16—second thrust block, 17—overload and weighing sensor, 18—spherical convex block, 19—retaining ring, 20—locking nut, 21—circular main shaft, 22—first through hole, 23—second through hole, 24—third through hole, 25—spherical groove, 26—fourth through hole. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0039] The container spreader structure is a standardized product with similar structures. For containers, the world has a unified standard, so the size of the rotating lock pin 12 is consistent, otherwise the lock pin 12 cannot enter the corner holes of the four corners of the container, which has a broad market prospect for the application of our invention and is convenient for promoting the technology of the present invention.

[0040] like Figure 1 , Figure 2 As shown, a calibration device for a sling-type container overload detection and weighing system comprises a trolley 1, a lift 4, a power supply system 2, a data display 3, and a calibration device. The power supply system 2 and the data display 3 are installed on the left side of the vehicle surface of the trolley 1. The power supply system 2 is an AC / DC dual-purpose power supply system. Preferably, the trolley 1 is also equipped with an A / D converter, a communication interface, and a printer interface. The data display 3 adopts a TFT color touch screen. The display content of the data display 3 includes the four-corner force values ​​Fa, Fb, Fc, Fd, the x-axis direction offset, and the y-axis direction offset.

[0041] The right side of the vehicle surface of the trolley 1 is equipped with a lift 4 and a verification unit, and the verification unit is located at the top of the lift 4. The verification unit includes a turn lock box bottom plate 13, a lock pin 12, a circular main shaft 21, a first thrust block 14, a second thrust block 16, an over-eccentric load and weighing sensor 17, a spherical bump 18, a retaining ring 19, a locking nut 20, a turntable support seat 5, a hydraulic jack 7, a ball seat 8, a force-bearing steel ball 9, a verification sensor 10, and a force transmission bracket 6. The over-eccentric load and weighing sensor 17 and the verification sensor 10 are electrically connected to the data display 3, and are powered by the power supply system 2.

[0042] A circular hole is provided at the center of the bottom plate 13 of the rotary lock box, and a first thrust block 14 is installed in the circular hole by interference fit or welding. The first thrust block 14 is cylindrical. A cylindrical boss 15 is provided on the upper part of the first thrust block 14 by welding or integral turning. The cylindrical boss 15 is integral with the first thrust block 14 and is a part of the first thrust block 14. A first through hole 22 is provided at the center of the cylindrical boss 15 and the first thrust block 14. A second thrust block 16 and an over-eccentric load and weighing sensor 17 are provided above the first thrust block 14. A second through hole 23 is provided at the center of the second thrust block 16. The cylindrical boss 15 on the upper part of the first thrust block 14 is movably installed in the second through hole 23 by clearance fit. A first spherical groove 25 is provided on the upper part of the second thrust block 16. The over-eccentric load and weighing sensor 17 is installed in the first spherical groove 25.

[0043] A third through hole 24 is provided at the center of the over-eccentric load and weighing sensor 17, a second spherical groove 25 is provided at the upper part of the over-eccentric load and weighing sensor 17, a spherical bump 18 is installed in the spherical groove 25, and a fourth through hole 26 is provided at the center of the spherical bump 18. The lower end of the circular main shaft 21 passes through the fourth through hole 26, the third through hole 24, the second through hole 23, and the first through hole 22 in sequence and is fixedly connected to the lock pin 12 located below the circular main shaft 21, and a retaining ring 19 and a locking nut 20 are provided at the upper end of the circular main shaft 21, the retaining ring 19 is located between the weighing sensor and the locking nut 20, and the locking nut 20 is installed on the upper end of the circular main shaft 21 by threaded connection.

[0044] The lock pin 12 is suspended and connected to a turntable support seat 5, and a hydraulic jack 7 is arranged in the turntable support seat 5. The bottom of the hydraulic jack 7 is fixed in the turntable support seat 5 by bolts, and a ball seat 8, a force-bearing steel ball 9, a calibration sensor 10, and a force transmission bracket 6 are sequentially installed above the hydraulic jack 7. The force-bearing steel ball 9 is placed in the ball seat 8, and the calibration sensor 10 is located between the force transmission bracket 6 and the force-bearing steel ball 9. Under the action of the hydraulic jack 7, the ball seat 8 and the force-bearing steel ball 9 press the calibration sensor 10 against the lower end of the force transmission bracket 6, and the upper end of the force transmission bracket 6 is in close contact with the bottom plate 13 of the rotary lock box.

[0045] like Figure 3 , Figure 4 As shown, the turntable support seat 5 includes a locking pin plate 501, a left lining plate 502, a right lining plate 503, and a jack mounting plate 504. The locking pin plate 501 is square, with a side length of 230 mm and a thickness of 31 mm. A first square hole 505 for the locking pin 12 to pass through and a square groove 506 for positioning the locking pin 12 are provided in the center of the locking pin plate 501. The first square hole 505 is 103 mm long and 58 mm wide, which is slightly larger than the size of the locking pin 12 so that the locking pin 12 can pass through smoothly.

[0046] The square groove 506 is located below the first square hole 505. The length of the square groove 506 is 103 mm, the width is 58 mm, and the depth is 20 mm. The square groove 506 is arranged vertically with the first square hole 505. After the lock pin 12 passes through the first square hole 505, it can be positioned in the square groove by rotating 90 degrees. Four sliding holes 507 are arranged on the four corners of the lock pin buckle plate 501. The left lining plate 502, the right lining plate 503 and the jack mounting plate 504 are arranged below the lock pin buckle plate 501. The upper ends of the left lining plate 502 and the right lining plate 503 are vertically welded to the lock pin buckle plate 501. The lower ends of the left lining plate 502 and the right lining plate 503 are vertically welded to the jack mounting plate 504. The jack mounting plate 504 is located directly below the lock pin buckle plate 501, and the jack mounting plate 504 is parallel to the lock pin buckle plate 501. A plurality of adjustment handles 11 are installed on the edge of the locking pin buckle plate 501 by welding or threaded connection. The adjustment handles 11 are used to fine-tune the position of the turntable support seat 5 so that the locking pin 12 can smoothly enter the square groove after passing through the first square hole 505.

[0047] like Figure 5 , Figure 6As shown, the force transmission bracket 6 includes a top plate 603, a sensor fixing plate 601, and a slide bar 602. The sensor fixing plate 601 is a square steel plate with a side length of 170 mm and a thickness of 25 mm. Four slide bars 602 are installed on the four corners of the sensor fixing plate 601 by welding or threaded connection. The slide bars 602 are smooth round bars, and their diameters correspond to the slide holes 507 on the lock pin buckle plate 501, which are about 20-30 mm. The four slide bars 602 pass through the four slide holes 507 on the four corners of the lock pin buckle plate 501 and are connected to the top plate 603 at the top of the slide bars 602. The connection method of the four slide bars 602 and the top plate 603 is welding or threaded connection. The top plate 603 is also a square steel plate with a side length of 170 mm and a thickness of 16-25 mm. A second square hole 604 is provided at the center of the top plate 603 . The size of the second square hole 604 matches the locking pin 12 so that the locking pin 12 can pass through smoothly.

[0048] The debugging method of the calibration device of the above-mentioned spreader-type container overload detection and weighing system comprises the following steps:

[0049] Step 1: Suspend the four spreaders of the container at a certain height (1.2~1.8m), and then move the calibration devices of the four spreader-type container overload detection and weighing systems to the bottom of the four rotary locks of the container spreaders.

[0050] Step 2: Use the elevator 4 to slowly raise the verification unit to the bottom plate of the pin box, pass the locking pin 12 through the second square hole 604 in the center of the top plate 603 and the first square hole 505 in the center of the locking pin buckle plate 501, rotate it 90 degrees and position it in the square groove 506 of the locking pin buckle plate 501, so that the verification unit is suspended on the locking pin 12.

[0051] Step 3: The lift 4 is lowered and reset, and then the hydraulic jack 7 in the verification unit is started to apply pressure. The hydraulic jack 7 generates a downward reaction force F4 on the jack mounting plate 504. At the same time, the hydraulic jack 7 generates an upward force F2 on the ball seat 8, the force-bearing steel ball 9 and the verification sensor 10. According to the principle that the action force is equal to the reaction force, it can be seen that F4=F2. The action force F2 is transmitted through the sensor fixing plate 601, the slide bar 602, and the top plate 603 to act on the bottom surface of the rotary lock box bottom plate 13 and the first thrust block 14, forming an upward action force F1 on the rotary lock box bottom plate 13 and the first thrust block 14. It can be seen that F1= F2, the reaction force F4 on the jack mounting plate 504 acts on the lock pin 12 through the left lining plate 502, the right lining plate 503, and the lock pin buckle plate 501. The downward force acting on the lock pin 12 acts on the over-eccentric load and weighing sensor 17 through the circular main shaft 21 connected to the lock pin 12, forming a downward force F3 on the over-eccentric load and weighing sensor 17. It can be seen that F3= F4, and since F4= F2 and F1= F2, the magnitude of the force F3 acting on the over-eccentric load and weighing sensor 17 is equal to the force F2 acting on the calibration sensor 10;

[0052] Step 4: According to the container load limit of 30.48t, the weight of 7.62t is evenly distributed to the four lock pins 12. By applying force to the hydraulic jack 7 in the force-adding mechanism of the verification system, observe that the display reading in the verification system gradually approaches the selected verification value, and stop pressurizing. According to the principle that the action force is equal to the reaction force, read the display data of the overload and weighing sensor 17, and compare and convert it with the display value of the verification sensor 10.

[0053] Step 5: During the calibration, the four rotary locks at the four corners of the container are synchronously and truly and accurately measured to obtain the total weight G, X-axis offset and Y-axis offset of the container, such as Figure 8 As shown in the figure, Fa, Fb, Fc, and Fd are the weights of the four corners of the container, and X and Y are the offsets of the center of gravity of the container in the X-axis and Y-axis directions respectively:

[0054] A=5850mm (20-foot box) or 11985mm (40-foot box)

[0055] B=2259mm (20ft / 40ft box width is the same)

[0056] Total weight G = Fa + Fb + Fc + Fd,

[0057] X (axis direction offset) = A / 2-(Fc+Fa)A / G...Formula

[0058] Y (axis direction offset) = B / 2-(Fc+Fd)B / G

[0059] Verification results can be automatically output / displayed / printed / remotely communicated, etc.

[0060] Step 6: Unbalanced load verification: Apply different pressures to the four locking pins 12, and the situation of Fa≠Fb≠Fc≠Fd will appear. Fig. 9 By calculating the eccentric load x and y values, the calculation is as follows

[0061] X=A / 2-(Fc+Fa)A / G

[0062] Y=B / 2-(Fc+Fd)B / G

[0063] X——represents the x-axis offset (20-foot box allows ±500mm, 40-foot box allows ±1000mm)

[0064] Y——represents the offset in the y-axis direction (±50mm for 20 feet / 40 feet)

[0065] G=Fa+Fb+Fc+Fd, G represents the total weight:

[0066] A represents the length of the box, 20 feet A = 5850mm, 40 feet A = 11985mm,

[0067] B=2259mm, 20ft / 40ft box width is the same.

[0068] Step 7: Obtaining the verification conclusion. Through steps 1 to 5, the verification system can display the x-axis offset and y-axis offset. This is used as a benchmark to verify the x-axis offset and y-axis offset displayed in the system being inspected. By comparing the two and calculating the relative error value, the measurement accuracy of the system being inspected can be obtained.

[0069] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications, such as changes in the shape and size of parts, without departing from the principle of the present invention, should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A calibration device for overload detection and weighing system of a spreader container, characterized in that: It includes a trolley, a lift, a power system, a data display, and a calibration device. The trolley is equipped with a power system, a data display, and a lift. The lift is equipped with a calibration unit. The calibration unit includes a turn lock box bottom plate, a lock pin, a circular main shaft, a first thrust block, a second thrust block, an overload and weighing sensor, a spherical bump, a retaining ring, a locking nut, a turntable support seat, a hydraulic jack, a ball seat, a force-bearing steel ball, a calibration sensor, and a force transmission bracket; A circular hole is provided at the center of the bottom plate of the rotary lock box, and a first thrust block is installed in the circular hole. A cylindrical boss is provided on the upper part of the first thrust block, and a first through hole is provided in the center of the first thrust block. A second thrust block and an over-eccentric load and weighing sensor are provided above the first thrust block. A second through hole is provided in the center of the second thrust block, and the cylindrical boss on the upper part of the first thrust block is installed in the second through hole. A first spherical groove is provided on the upper part of the second thrust block, and an over-eccentric load and weighing sensor are installed in the first spherical groove. A third through hole is provided in the center of the over-eccentric load and weighing sensor, and a second spherical groove is provided on the upper part of the over-eccentric load and weighing sensor, and a spherical bump is installed in the spherical groove. A fourth through hole is provided in the center of the spherical bump. The lower end of the circular main shaft is arranged according to The locking nut is connected to the upper end of the circular main shaft by a retaining ring and a locking nut, and the retaining ring is located between the weighing sensor and the locking nut, and the locking nut is connected to the upper end of the circular main shaft by a threaded connection; the locking pin is connected to the turntable support seat, and a hydraulic jack is installed in the turntable support seat, and a ball seat, a force-bearing steel ball, a calibration sensor, and a force transmission bracket are installed above the hydraulic jack in sequence, and the force-bearing steel ball is placed in the ball seat, and the calibration sensor is located between the force transmission bracket and the force-bearing steel ball. Under the action of the hydraulic jack, the ball seat and the force-bearing steel ball press the calibration sensor against the lower end of the force transmission bracket, and the upper end of the force transmission bracket is in close contact with the bottom plate of the rotary lock box; The turntable support seat includes a lock pin buckle plate, a left lining plate, a right lining plate, and a jack mounting plate. The center of the lock pin buckle plate is provided with a first square hole for the lock pin to pass through and a square groove for positioning the lock pin. The square groove is located below the first square hole and is perpendicular to the first square hole. Four sliding holes are provided on the four corners of the lock pin buckle plate. The bottom of the lock pin buckle plate is vertically connected to the left lining plate and the right lining plate. The bottom ends of the left lining plate and the right lining plate are fixedly connected to the jack mounting plate. The jack mounting plate is located directly below the lock pin buckle plate, and the jack mounting plate is arranged in parallel with the lock pin buckle plate. A plurality of adjustment handles are installed on the edge of the lock pin buckle plate by welding or threaded connection. The force transmission bracket includes a top plate, a sensor fixing plate, and a slide bar. Four slide bars are installed on the four corners of the sensor fixing plate. The four slide bars are respectively connected to the top plate located at the top of the slide bar through four slide holes on the four corners of the lock pin buckle plate. A second square hole is provided in the center of the top plate. The size of the second square hole is adapted to the lock pin. The trolley is also equipped with an A / D converter, a communication interface, and a printer interface. The data display uses a TFT color touch screen. The display contents of the data display include the four-corner force values ​​Fa, Fb, Fc, Fd, the eccentricity value in the x-axis direction, and the eccentricity value in the y-axis direction.

2. A method for debugging the calibration device of the spreader container overload detection and weighing system according to claim 1, characterized in that: It includes the following steps: Step 1: Move the calibration device of the overload detection and weighing system of the spreader container to the bottom of the four rotary locks of the container spreader; Step 2: Use a lift to slowly raise the verification unit to the bottom plate of the rotation pin box, pass the lock pin through the second square hole in the center of the top plate and the first square hole in the center of the lock pin buckle plate, rotate 90 degrees and position it in the square groove of the lock pin buckle plate, so that the verification unit is suspended on the lock pin; Step 3: The lift descends and resets, and the hydraulic jack in the verification unit is started to pressurize. The hydraulic jack generates a downward reaction force F4 on the jack mounting plate. At the same time, the hydraulic jack generates an upward force F2 on the ball seat, the force-bearing steel ball and the verification sensor. According to the principle that the action force is equal to the reaction force, it can be seen that F4=F2. The action force F2 is transmitted through the sensor fixing plate, the slide bar and the top plate to act on the bottom plate of the rotary lock box and the bottom surface of the first thrust block, forming an upward force F1 on the bottom plate of the rotary lock box and the first thrust block. It can be seen that F1=F2. The reaction force F4 on the jack mounting plate acts on the lock pin through the left lining plate, the right lining plate and the lock pin buckle plate. This downward force acting on the lock pin then acts on the overload and weighing sensor through the circular main shaft connected to the lock pin, forming a downward force F3 on the overload and weighing sensor. It can be seen that F3=F4. Since F4=F2 and F1= F2, so the magnitude of the force F3 acting on the overload and weighing sensor is equal to the force F2 acting on the calibration sensor; Step 4: Slowly increase the pressure of the hydraulic jack to the value required for verification, stop pressurizing, and read the display data of the overload and weighing sensor according to the principle that the action force is equal to the reaction force, and compare and convert it with the display value of the verification sensor; Step 5: Synchronously check the four rotary locks on the four corners of the container, and truly and accurately measure the weights Fa, Fb, Fc, and Fd of the four corners of the container. The total weight of the container is G=Fa+Fb+Fc+Fd. At the same time, according to the formula: X-axis offset=A / 2-(Fc+Fa)A / G, Y-axis offset=B / 2-(Fc+Fd)B / G, the X-axis offset and Y-axis offset are obtained. The verification results are automatically output / displayed / printed / remotely communicated; Step 6: Multi-point loading calibration. Select any loading pressure value through the calibration device, observe the reading of the calibration device and compare and convert it with the display value of the container overload detection and weighing system, so as to obtain the error of the measured system and realize its calibration function.

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