High-precision grounding resistance testing device

Abstract

The invention relates to the technical field of grounding resistance testing, in particular to a high-precision grounding resistance testing device which comprises a machine body, a clamping mechanism is arranged in the middle of the upper end in the machine body, an equipment bin is arranged on the lower portion in the machine body, a power mechanism is arranged at the lower end in the equipment bin, and a positive and negative thread threaded rod is arranged on the power mechanism. The two ends of the positive and negative tooth threaded rod are rotationally connected to the opposite inner walls of the equipment bin correspondingly, and the two sides of the positive and negative tooth threaded rod are jointly provided with a moving mechanism. According to the invention, the resistance condition of the grounding equipment can be tested through the machine body, the length condition of the grounding equipment can be fully adjusted according to needs, the accuracy of testing the resistance condition of the grounding equipment is improved, and the change condition of resistance data of the grounding equipment can be effectively predicted.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding resistance testing, and particularly to a high-precision grounding resistance testing device. Background Art

[0002] In existing safety regulations comprehensive testers, customers often need to complete all test items on an output socket, so as to have the advantages of convenient and fast comprehensive testing. If the four-terminal network and high-voltage test fixture combination method is still used, the advantages of fast and convenient comprehensive tester will be lost. However, if a comprehensive socket is used for testing, how to solve the accuracy of the grounding resistance is indeed a problem. In the conventional connection method, the resistance of the test wire cannot be solved during the test process. Even if the wire is peeled, but when the wire is changed, the wire body ages, and the changes in temperature and humidity will affect the change of the wire body resistance, thus bringing test errors.

[0003] A high-precision grounding resistance testing device with the publication number of CN220983391U includes a comprehensive tester component; a measurement component; the measurement component includes a power socket of the device under test connected to the outer surface of the dedicated power plug of the comprehensive tester, the whole device under test connected to the outer side of the power socket of the device under test, a metal shell of the device under test connected to the outer end of the whole device under test, a four-terminal grid electrically connected to the metal shell of the device under test through a circuit, a sampling resistor connected to the inside of the four-terminal grid, and a lead wire electrically connected to the four-terminal grid through a circuit; and a protection component. The present invention solves the problem that in existing safety regulations comprehensive testers, customers often need to complete all test items on an output socket, so as to have the advantages of convenient and fast comprehensive testing. However, if a comprehensive socket is used for testing, how to solve the accuracy of the grounding resistance is indeed a problem. In the conventional connection method, the resistance of the test wire cannot be solved during the test process.

[0004] However, the above technical solution cannot measure the resistance of test wires with different lengths as required, and cannot effectively predict the resistance in different length cases according to the grounding test wire, so improvement is needed. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies in the prior art, and a high-precision grounding resistance testing device is proposed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: A high-precision grounding resistance testing device includes a body. In the upper middle part of the body, a clamping mechanism is provided. In the lower part of the body, there is an equipment chamber. At the lower end of the equipment chamber, a power mechanism is provided. On the power mechanism, there is a left-right hand threaded rod. The two ends of the left-right hand threaded rod are respectively rotatably connected to the opposite inner walls of the equipment chamber. On both sides of the left-right hand threaded rod, a moving mechanism is provided; Two bearing plates are symmetrically arranged on the moving mechanism. The two bearing plates are respectively located on both sides of the lower end inside the machine body. Test plates are fixedly installed at the upper ends of the two bearing plates. A plurality of retractable current detection devices are arranged on the opposite sides of the two test plates. A plurality of retractable current detection devices located on the same test plate form a group, and the two groups of retractable current detection devices are arranged staggeredly.

[0007] Preferably, in order to clamp the grounding device during the resistance test and keep the grounding device stable during the test, the clamping mechanism includes two vertical plates fixedly connected to the middle of the upper end inside the machine body. Second telescopic rods are fixed on the opposite sides of the two vertical plates. Clamping pieces are fixed at the opposite ends of the two second telescopic rods. Second springs are sleeved on the two second telescopic rods. The other ends of the two second springs are respectively fixedly connected to the opposite sides of the two vertical plates, and the opposite ends of the two second springs are respectively fixedly connected to the two clamping pieces.

[0008] Preferably, in order to drive the rotation of the right and left hand threaded rod, the power mechanism includes a servo motor fixedly installed at the lower end inside the equipment compartment. The end of the output shaft of the servo motor is fixedly connected with a driving bevel gear. A transmission bevel gear is meshed with one side of the upper end of the driving bevel gear. The transmission bevel gear is fixedly sleeved on the middle of the right and left hand threaded rod.

[0009] Preferably, in order to drive the two test plates and the two groups of retractable current detection devices to move towards each other, the two groups of retractable current detection devices can move towards each other to abut and clamp the grounding device, and the electrode connection position can be controlled as needed. The moving mechanism includes two threaded sleeves respectively threadedly sleeved on both sides of the right and left hand threaded rod. Sliders are fixed at the upper ends of the two threaded sleeves. A long slot is opened at the lower end inside the machine body. The two sliders are respectively slidably sleeved on both sides inside the long slot. The two bearing plates are respectively fixedly connected to the upper ends of the two sliders.

[0010] Preferably, in order to close the machine body through the machine door during the resistance test of the grounding device by the machine body, to avoid the retractable current detection device being affected by the outside world and causing inaccurate measurement of the resistance of the grounding device, an opening is provided on one side of the machine body. A machine door is correspondingly arranged on one side of the opening. Connecting pipes are arranged at the upper and lower ends on one side of the machine door. A vertical rod is rotatably sleeved inside the two connecting pipes. Fixing blocks are fixed at both ends of the vertical rod. The two fixing blocks are both fixedly connected to one side of the machine body. A viewing window is provided on the machine door, and a handle is provided on the machine door.

[0011] Preferably, in order to fasten the machine door and prevent it from moving, a clamping block is fixed in the middle of the other side of the machine door. A clamping groove is formed on one side of the clamping block. A fixing plate is fixed on the other side of the machine body. A first telescopic rod is fixed on one side of the fixing plate. A clamping member is fixed at one end of the first telescopic rod. A first spring is sleeved on the first telescopic rod. One end of the first spring is fixedly connected to one side of the fixing plate, and the other end of the first spring is fixedly connected to the clamping member. A pulley is rotatably sleeved in the clamping member, and the pulley is fastened in the clamping groove.

[0012] Preferably, in order to facilitate the movement of the machine body and keep the machine body stable during use, a data display controller is provided on one side of the machine body. Universal wheels are provided at the four corners of the lower end of the machine body. Support screws are fixed at the four corners of the lower end of the machine body, and cushioning members are threadedly sleeved at the lower ends of the four support screws.

[0013] Preferably, in order to keep the two bearing plates moving smoothly, two cross bars are fixed at the lower end inside the machine body. Sleeve tubes are fixed on both sides of the two bearing plates, and the four sleeve tubes are respectively slidably sleeved on the two cross bars.

[0014] The beneficial effects of the present invention are as follows: 1. Through the use of the moving mechanism, the test board and the retractable current detection device, when testing the resistance of the grounding device, the two test boards can be moved towards each other, so that the multiple retractable current detection devices on the two test boards contact the grounding device, and any one of the retractable current detection devices on both sides can be controlled to connect the electrode to the grounding device, which can effectively adjust and detect the resistance change in different length situations, so as to establish accurate data for subsequent effective prediction; 2. Through the use of the clamping mechanism, one end of the grounding device can be clamped during the process of testing the resistance of the grounding device, so that the grounding device remains stable during the resistance test. In summary, the present invention can test the resistance of the grounding device through the machine body, can fully adjust the length of the grounding device according to needs to improve the accuracy of the resistance test of the grounding device, and can effectively predict the change of the resistance data of the grounding device. Description of the Drawings

[0015] Figure 1 It is the front view of the present invention; Figure 2 It is the schematic diagram of the internal structure of the machine body of the present invention; Figure 3 It is the enlarged view of part A of the present invention Figure 1 ; Figure 4 It is the enlarged view of the clamping member of the present invention.

[0016] In the figure: 1 body, 2 data display controller, 3 fixed block, 4 vertical rod, 5 connecting pipe, 6 machine door, 7 visual window, 8 handle, 9 clamping block, 10 fixing plate, 11 first telescopic rod, 12 first spring, 13 clamping part, 14 pulley, 15 support screw rod, 16 cushioning part, 17 universal wheel, 18 equipment bin, 19 servo motor, 20 driving bevel gear, 21 transmission bevel gear, 22 positive and negative thread screw rod, 23 threaded sleeve, 24 slider, 25 bearing plate, 26 sleeve, 27 cross rod, 28 test plate, 29 retractable current detection device, 30 vertical plate, 31 second telescopic rod, 32 second spring, 33 clamping part. Detailed implementation manner

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0018] Refer to Figures 1-4 , a high-precision grounding resistance testing device, including a body 1. The body 1 is a device carrier for testing the resistance of a grounding device after it is manufactured. The resistance of the grounding device can be tested through the operation of various components in the body 1. A data display controller 2 is provided on one side of the body 1. The data display controller 2 is connected to supporting components for stable operation, can set programs and operate automatically. The data display controller 2 can control various components in the body 1 and display the test results at the same time.

[0019] Refer to Figures 1-4 , universal wheels 17 are provided at the four corners of the lower end of the body 1, support screw rods 15 are fixed at the four corners of the lower end of the body 1, and cushioning parts 16 are threadedly sleeved at the lower ends of the four support screw rods 15. The universal wheel 17 is a component that can change the steering at will. The body 1 can be moved more conveniently through the universal wheel 17. When the body 1 needs to be stable, the cushioning part 16 can be rotated to adjust the lifting of the cushioning part 16 on the support screw rod 15. When the cushioning part 16 descends and abuts against the ground, the body 1 can be supported to prevent the body 1 from moving during operation.

[0020] Refer to Figure 1 , 3, an opening is provided on one side of the body 1, and a machine door 6 is correspondingly arranged on one side of the opening. Through the opening, the grounding device whose resistance needs to be tested can be placed into and taken out of the body 1. Through the machine door 6, the opening can be closed to prevent the external environment from affecting the test data of the resistance inside the body 1 during the resistance testing process of the grounding device. Connecting pipes 5 are arranged at both the upper and lower ends on one side of the machine door 6. A vertical rod 4 is rotatably sleeved in the two connecting pipes 5. Fixed blocks 3 are fixed at both ends of the vertical rod 4, and both fixed blocks 3 are fixedly connected to one side of the body 1. The vertical rod 4 can be fixed on the body 1 through the two fixed blocks 3, and the machine door 6 can be installed on the vertical rod 4 through the two connecting pipes 5, enabling the machine door 6 to rotate on the vertical rod 4. A viewing window 7 is provided on the machine door 6, and a handle 8 is provided on the machine door 6. The handle 8 can facilitate the opening and closing of the machine door 6, and the viewing window 7 can be used to observe the grounding device inside the body 1. A clamping block 9 is fixed in the middle of the other side of the machine door 6, and a clamping groove is provided on one side of the clamping block 9. The clamping block 9 can be buckled by a matching component entering the clamping groove, and when the clamping block 9 is buckled, the machine door 6 can be buckled, which can limit the movement of the machine door 6 when it is not moved.

[0021] Refer to Figure 1 , 3 , a fixing plate 10 is fixed on the other side of the body 1, and a first telescopic rod 11 is fixed on one side of the fixing plate 10. A clamping member 13 is fixed at one end of the first telescopic rod 11. The fixing plate 10 can support the first telescopic rod 11. The first telescopic rod 11 is a component that can be telescoped. Through the first telescopic rod 11, the clamping member 13 can move horizontally. A first spring 12 is sleeved on the first telescopic rod 11. One end of the first spring 12 is fixedly connected to one side of the fixing plate 10, and the other end of the first spring 12 is fixedly connected to the clamping member 13. The first spring 12 has elasticity and can drive the clamping member 13 to move towards the clamping block 9 by the elasticity of the first spring 12 when the clamping member 13 is not pressed. A pulley 14 is rotatably sleeved in the clamping member 13, and the pulley 14 is buckled in the clamping groove. The movement of the clamping member 13 can drive the movement of the pulley 14. When the machine door 6 closes the opening, the clamping member 13 will drive the pulley 14 into the clamping groove. When the pulley 14 enters the clamping groove, it will buckle the clamping block 9 to prevent the clamping block 9 from moving. By restricting the movement of the clamping block 9, the movement of the machine door 6 can be restricted, making the machine door 6 close the opening more stably.

[0022] Refer to Figure 2 , 4, a clamping mechanism is provided in the middle of the upper end inside the body 1. The clamping mechanism includes two vertical plates 30 fixedly connected to the middle of the upper end inside the body 1. On the opposite sides of the two vertical plates 30, second telescopic rods 31 are fixed. At the opposite ends of the two second telescopic rods 31, clamping members 33 are fixed. The two vertical plates 30 can bear the two second telescopic rods 31. The two second telescopic rods 31 are components that can be telescoped. The two clamping members 33 can be borne by the two second telescopic rods 31, so that the two clamping members 33 move in a horizontal state when moving. Second springs 32 are sleeved on the two second telescopic rods 31. The other ends of the two second springs 32 are respectively fixedly connected to the opposite sides of the two vertical plates 30. The opposite ends of the two second springs 32 are respectively fixedly connected to the two clamping members 33. The second spring 32 has elasticity. The two clamping members 33 can be pressed by the two second springs 32, so that the two clamping members 33 move towards each other. By the opposite movement of the two clamping members 33, one end of the grounding device whose resistance needs to be measured can be clamped, so that the grounding device remains stable when measuring the resistance inside the body 1.

[0023] Refer to Figure 2 , a device bin 18 is provided in the lower part inside the body 1. A power mechanism is provided at the lower end inside the device bin 18. A positive and negative thread screw rod 22 is provided on the power mechanism. The two ends of the positive and negative thread screw rod 22 are respectively rotatably connected to the opposite inner walls of the device bin 18. Through the operation of the power mechanism, the positive and negative thread screw rod 22 can be driven to rotate. The positive and negative thread screw rod 22 is a component with opposite threads provided on both sides. The power mechanism includes a servo motor 19 fixedly installed at the lower end inside the device bin 18. The end of the output shaft of the servo motor 19 is fixedly connected to a driving bevel gear 20. A transmission bevel gear 21 is meshed with one side of the upper end of the driving bevel gear 20. The transmission bevel gear 21 is fixedly sleeved on the middle of the positive and negative thread screw rod 22. The servo motor 19 is connected to the supporting components, which is convenient for stable operation, can set programs and operate automatically. When the servo motor 19 operates, it will drive the driving bevel gear 20 to rotate. The driving bevel gear 20 will push the transmission bevel gear 21 to rotate. The transmission bevel gear 21 will drive the positive and negative thread screw rod 22 to rotate. A moving mechanism is provided on both sides of the positive and negative thread screw rod 22. Two bearing plates 25 are symmetrically provided on the moving mechanism. The two bearing plates 25 are respectively located on both sides of the lower end inside the body 1. The rotation of the positive and negative thread screw rod 22 can provide power for the moving mechanism. The operation of the moving mechanism can drive the two bearing plates 25 to move towards each other and in the opposite direction.

[0024] Refer to Figure 2, The moving mechanism includes two threaded sleeves 23 respectively threaded on both sides of the forward and reverse threaded rod 22. The upper ends of the two threaded sleeves 23 are both fixed with sliders 24. A long slot is opened at the lower end inside the machine body 1. The two sliders 24 are respectively slidably sleeved on both sides inside the long slot. When the forward and reverse threaded rod 22 rotates, it will push the two threaded sleeves 23 to move towards and away from each other. The movement of the two threaded sleeves 23 towards and away from each other can drive the two sliders 24 to move towards and away from each other inside the long slot. Two bearing plates 25 are respectively fixedly connected to the upper ends of the two sliders 24. The movement of the two sliders 24 can drive the two bearing plates 25 to move. Thus, the movement of the two bearing plates 25 towards and away from each other can be controlled through the operation of the servo motor 19. Two cross bars 27 are fixed at the lower end inside the machine body 1. Sleeve tubes 26 are fixed on both sides of the two bearing plates 25. The four sleeve tubes 26 are respectively slidably sleeved on the two cross bars 27. When the two bearing plates 25 move, they can drive the four sleeve tubes 26 on the two cross bars 27. Through the sliding of the four sleeve tubes 26 on the two cross bars 27, the two bearing plates 25 can move in a horizontal state when moving.

[0025] Refer to Figure 1 , 2 , Test plates 28 are fixedly installed at the upper ends of the two bearing plates 25. A plurality of retractable current detection devices 29 are arranged on the opposite sides of the two test plates 28. A plurality of retractable current detection devices 29 located on the same test plate 28 form a group. The two groups of retractable current detection devices 29 are arranged staggered. The movement of the two bearing plates 25 towards and away from each other can drive the two groups of retractable current detection devices 29 to move towards and away from each other. The retractable current detection device 29 is connected to the supporting components, which is convenient for stable operation, can set programs and operate automatically. Electrodes are arranged inside it, and it can control the extension of a single electrode to be connected to the grounding device according to needs to complete the connection of the circuit. The retractable current detection device 29 is electrically connected to the data display controller 2. The resistance condition data detected by the retractable current detection device 29 will be transmitted to the data display controller 2 for display, so that the plurality of retractable current detection devices 29 on the two test plates 28 are in contact with the grounding device, and it can control the connection of the electrode in any one of the retractable current detection devices 29 on both sides to the grounding device, which can effectively adjust and detect the resistance change situation under different lengths, so as to establish accurate data for effective subsequent prediction; the resistance condition data of the grounding device can be tested more accurately.

[0026] In the present invention, the machine door 6 is opened, and one end of the grounding device is placed between the two clamping members 33. The elastic force of the two second springs 32 causes the two clamping members 33 to move towards each other, so that the two clamping members 33 clamp one end of the grounding device. Then the machine door 6 is closed. The servo motor 19 is controlled to operate by the data display controller 2. The servo motor 19 drives the driving bevel gear 20 to rotate. The driving bevel gear 20 pushes the driven bevel gear 21 to rotate. The driven bevel gear 21 drives the left-right threaded rod 22 to rotate. The left-right threaded rod 22 pushes the two threaded sleeves 23 to move towards each other. The two threaded sleeves 23 drive the two sliders 24 to move towards each other. The two sliders 24 drive the two bearing plates 25 to move towards each other. The two bearing plates 25 drive the two test plates 28 to move towards each other, so that a plurality of retractable current detection devices 29 on the two test plates 28 contact the grounding device. Moreover, it can control the connection between the electrode in any one of the retractable current detection devices 29 on both sides and the grounding device, and can effectively adjust and detect the resistance change under different lengths, so as to establish accurate data for subsequent effective prediction.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A high-precision device for testing grounding resistance, comprising a body (1), characterized in that: A clamping mechanism is provided in the middle of the upper end inside the body (1). An equipment chamber (18) is provided at the lower part inside the body (1). A power mechanism is provided at the lower end inside the equipment chamber (18). A left - and - right - hand threaded rod (22) is provided on the power mechanism. The two ends of the left - and - right - hand threaded rod (22) are respectively rotatably connected to the opposite inner walls of the equipment chamber (18). A moving mechanism is provided on both sides of the left - and - right - hand threaded rod (22). Two bearing plates (25) are symmetrically provided on the moving mechanism. The two bearing plates (25) are respectively located on both sides of the lower end inside the body (1). Test plates (28) are fixedly installed at the upper ends of the two bearing plates (25). A plurality of retractable current detection devices (29) are provided on the opposite sides of the two test plates (28). The plurality of retractable current detection devices (29) located on the same test plate (28) are in a group, and the two groups of retractable current detection devices (29) are arranged staggeredly.

2. The high-precision grounding resistance testing device according to claim 1, characterized in that: The clamping mechanism includes two vertical plates (30) fixedly connected to the middle of the upper end inside the body (1). Second telescopic rods (31) are fixed to the opposite sides of the two vertical plates (30). Clamping parts (33) are fixed to the opposite ends of the two second telescopic rods (31). Second springs (32) are sleeved on the two second telescopic rods (31). The other ends of the two second springs (32) are respectively fixedly connected to the opposite sides of the two vertical plates (30). The opposite ends of the two second springs (32) are respectively fixedly connected to the two clamping parts (33).

3. A high-precision test grounding resistance device according to claim 1, characterized in that: The power mechanism includes a servo - motor (19) fixedly installed at the lower end inside the equipment chamber (18). A driving bevel gear (20) is fixedly connected to the end of the output shaft of the servo - motor (19). A transmission bevel gear (21) is meshed with the upper side of the driving bevel gear (20). The transmission bevel gear (21) is fixedly sleeved on the middle of the left - and - right - hand threaded rod (22).

4. A high-precision grounding resistance testing device according to claim 1, characterized in that: The moving mechanism includes two threaded sleeves (23) respectively threadedly sleeved on both sides of the left - and - right - hand threaded rod (22). Sliders (24) are fixed to the upper ends of the two threaded sleeves (23). A long slot is formed at the lower end inside the body (1). The two sliders (24) are respectively slidably sleeved on both sides inside the long slot. The two bearing plates (25) are respectively fixedly connected to the upper ends of the two sliders (24).

5. A high-precision grounding resistance testing device according to claim 1, characterized in that: An opening is formed on one side of the body (1). A machine door (6) is correspondingly arranged on one side of the opening. Connecting pipes (5) are arranged at the upper and lower ends on one side of the machine door (6). A vertical rod (4) is rotatably sleeved inside the two connecting pipes (5). Fixed blocks (3) are fixed to both ends of the vertical rod (4). The two fixed blocks (3) are both fixedly connected to one side of the body (1). A viewing window (7) is arranged on the machine door (6). A handle (8) is arranged on the machine door (6).

6. The high-precision grounding resistance testing device according to claim 5, characterized in that: A clamping block (9) is fixed to the middle of the other side of the machine door (6). A clamping groove is formed on one side of the clamping block (9). A fixing plate (10) is fixed to the other side of the machine body (1). A first telescopic rod (11) is fixed to one side of the fixing plate (10). A clamping member (13) is fixed to one end of the first telescopic rod (11). A first spring (12) is sleeved on the first telescopic rod (11). One end of the first spring (12) is fixedly connected to one side of the fixing plate (10), and the other end of the first spring (12) is fixedly connected to the clamping member (13). A pulley (14) is rotatably sleeved in the clamping member (13), and the pulley (14) is buckled in the clamping groove.

7. The high-precision test grounding resistance device according to claim 1, characterized in that: A data display controller (2) is arranged on one side of the machine body (1). Universal wheels (17) are arranged at the four corners of the lower end of the machine body (1). Support screws (15) are fixed to the four corners of the lower end of the machine body (1). Pad pieces (16) are threadedly sleeved at the lower ends of the four support screws (15).

8. The high-precision grounding resistance testing device according to claim 1, characterized in that: Two cross bars (27) are fixed to the lower end inside the machine body (1). Sleeves (26) are fixed to both sides of the two bearing plates (25). The four sleeves (26) are respectively slidably sleeved on the two cross bars (27).

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