A ground resistance tester

Abstract

The present invention relates to the technical field of ground resistance testers, and specifically to a ground resistance tester, comprising a tester main body, a partition is arranged inside the tester main body, four right-angle turns at the bottom end of the tester main body are arranged with supporting feet, the tester comprises a fixed isolation mechanism and a hanging and winding mechanism, the fixed isolation mechanism also comprises a lifting and positioning module and a strengthened balancing module, the braking effect of the braking servo motor is utilized to prevent four groups of conical gear sleeves from rotating with support columns, thereby adjusting the heights of the four groups of support columns separately, increasing the adaptability of the tester main body to the ground environment, and the restoring force of the reset spring is used to stably clamp the clamping plate in the clamping slot again, thereby preventing the limiting rod from rotating with the support column, facilitating the guarantee of the lifting and positioning module effect, and allowing the four groups of support columns to be lifted and lowered simultaneously.

Description

Technical Field

[0001] The invention relates to the technical field of ground resistance testers, and in particular to a ground resistance tester. Background Art

[0002] A ground resistance tester is an instrument used to measure the ground resistance of an electrical device or system. Ground resistance usually refers to the resistance between the ground grid or grounding electrode and the ground in a grounding system. The ground resistance tester calculates the ground resistance by sending a certain current into the grounding system and then measuring the related voltage. The measurement of the ground resistance tester is very important to ensure the safety and reliability of electrical equipment, because the appropriate ground resistance can protect personnel from the risk of electric shock and ensure the correct operation of the equipment. Usually, the ground resistance tester is equipped with two probes, a 5-meter wire, a 20-meter wire and a 40-meter wire.

[0003] For example, the related technology (application number CN202311264087.9) discloses a ground resistance tester, which drives the connecting belt transmission by rotating the active bevel gear rod, and then completes the synchronous winding of the 40-meter wire and the 20-meter wire through the large pulley and the small pulley with different circumferences, thereby improving the working efficiency of the tester. By adjusting the position of the slider, the sliders are placed on opposite sides of the two slide plates, the connecting rod is adjusted to a certain inclination, and the cross bar is adjusted to the position where the brush is vertically upward, so that the tester can be away from the ground at a certain height during measurement, which can reduce the interference of the ground stray potential on the tester, thereby improving the measurement accuracy and quality.

[0004] Although the ground resistance tester is easy to roll up, it is difficult to disassemble and access the wires. Although it can be kept at a certain height away from the ground to reduce the interference of the ground stray potential on the tester, the tester is often used in the field on uneven or even inclined ground environments, where the heights of the surrounding areas may be different, making it difficult to place it in a balanced and stable manner.

[0005] Therefore, a ground resistance tester is proposed. Summary of the invention

[0006] The object of the present invention is to provide a ground resistance tester to solve the problems of unstable placement and inconvenient wire collection proposed in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ground resistance tester, comprising a tester body, a partition is arranged inside the tester body, four right-angled corners at the bottom of the tester body are provided with supporting feet, the tester comprises a fixed isolation mechanism and a hanging and winding mechanism, the fixed isolation mechanism also comprises a lifting and positioning module and a strengthening balance module, the lifting and positioning module can drive four groups of support columns to rise and fall synchronously, so that the pins at the bottom of the support columns are stably inserted on the ground, so as to realize the isolation of the tester body from the ground environment, and the strengthening balance module can adjust the lifting height of the support columns separately, so that the tester body can be placed in a balanced manner on the inclined ground environment;

[0008] The hanging and winding mechanism includes a hanging assembly module and an automatic winding module. The hanging assembly module can utilize the working process of the lifting and positioning module to disassemble and assemble the winding drum, so that the hanging of the winding drum just matches the change in the height of the support column. The automatic winding module can make the hanging winding drum rotate to realize the automatic winding of the wire.

[0009] Preferably, the lifting and positioning module includes a support column arranged inside the four right-angle turns of the tester body, a pin is arranged at the bottom end of the support column, a conical gear sleeve is threadedly connected to the support column, the conical gear sleeve is rotatably connected to the inside of the support foot, a first conical gear is meshed with the upper part of the conical gear sleeve, a screw rod is fixedly connected between the two groups of first conical gears, a pulley is fixedly connected to the outer side of the screw rod, and the two groups of pulleys are connected by a belt for transmission.

[0010] Preferably, a brake servo motor is fixedly mounted on one side of the partition, a second bevel gear is fixedly mounted on the output shaft of the brake servo motor, and the second bevel gear is meshed with one set of bevel gear sleeves.

[0011] Preferably, the enhanced balance module includes a limiting rod mounted inside the support column, a positioning plate is provided at the upper end of the limiting rod, a limiting block is provided at the upper end of the positioning plate, the positioning plate is clamped in the movable cavity, a pressure plate attached to the upper end of the positioning plate is provided inside the movable cavity, the pressure plate passes through the tester body through the clamping sleeve and is fixedly connected to a clamping plate, the clamping plate is clamped in a slot opened at the upper end of the tester body, the clamping plate is adapted to the slot, and a handle is fixedly connected to the upper end of the clamping plate.

[0012] Preferably, a return spring is provided between the upper end of the pressure plate and the top end of the movable cavity, and the return spring is sleeved on the outside of the clamping sleeve.

[0013] Preferably, the outer side of the support column and the inner side of the limiting rod are both arranged in a polygonal manner, and the support column and the limiting rod are adapted to each other.

[0014] Preferably, a pressing plate and a clamping sleeve are clamped on the outer side of the limiting block, and the outer side of the limiting block and the inner sides of the pressing plate and the clamping sleeve are all arranged in a polygonal shape.

[0015] Preferably, the automatic winding module includes a double-headed motor arranged at the upper end of the partition, the output shaft of the double-headed motor is fixedly mounted with a third bevel gear, the third bevel gear is meshed with a fourth bevel gear, the bottom end of the fourth bevel gear passes through the partition via a rotating shaft and is fixedly connected to a mounting cylinder, and the bottom end of the mounting cylinder is sleeved with a winding cylinder.

[0016] Preferably, the hanging assembly module includes an expansion airbag arranged inside the mounting tube, a clamping block is attached to the outer side of the expansion airbag, the outer side of the clamping block passes through the mounting tube and is clamped in the clamping hole, the clamping hole is provided on the winding tube, the upper end of the expansion airbag is fixedly connected to one end of the air supply pipe, the other end of the air supply pipe passes through the fourth bevel gear and the mounting tube and is fixedly connected to the telescopic airbag, one end of the telescopic airbag is fixedly connected to the movable block, the movable block is threadedly connected to the outer side of the screw rod, and the other end of the telescopic airbag is fixedly connected to the partition.

[0017] Preferably, the telescopic airbag is sleeved on the outer side of the screw rod, and one side of the movable block is slidably connected to the partition plate to achieve horizontal movement of the movable block.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention is conducive to driving the four groups of support columns to rise and fall at the same time by designing a lifting and positioning module. Not only can the tester body be more stably inserted into the ground through the pins, but the tester body can also be kept away from the ground by a certain height, reducing the influence of factors such as ground stray potential and humid environment on the tester body.

[0020] 2. The present invention is designed to strengthen the coordination of the balancing module with the lifting and positioning module, which is beneficial to utilizing the braking effect of the braking servo motor so that the four groups of conical gear sleeves will not rotate with the support columns, thereby adjusting the heights of the four groups of support columns separately, thereby increasing the adaptability of the tester main body to the ground environment, and through the restoring force of the reset spring, the clamping plate is stably clamped in the clamping slot again, so that the limiting rod will not rotate with the support column, which is convenient for ensuring the effect of the lifting and positioning module and allows the four groups of support columns to be lifted and lowered at the same time.

[0021] 3. The present invention is designed to cooperate with the automatic winding module in hanging assembly module, which is beneficial to control the extension and retraction of the telescopic airbag by utilizing the operation process of the lifting and positioning module, and is convenient for disassembly and assembly of the winding drum. The elevation of the tester body just reserves a hanging space for the winding drum, which makes it convenient to place the tester body on the ground to wind the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is an overall three-dimensional schematic diagram of a ground resistance tester according to an embodiment of the present invention;

[0024] Figure 2 A ground resistance tester according to an embodiment of the present invention Figure 1 Schematic diagram of the cross-section at AA in the middle;

[0025] Figure 3 A ground resistance tester according to an embodiment of the present invention Figure 2 The enlarged schematic diagram of point B in the middle;

[0026] Figure 4 A ground resistance tester according to an embodiment of the present invention Figure 2 The enlarged schematic diagram at C in the middle;

[0027] Figure 5 A partial three-dimensional schematic diagram of a ground resistance tester according to an embodiment of the present invention Figure 1 ;

[0028] Figure 6 A partial three-dimensional schematic diagram of a ground resistance tester according to an embodiment of the present invention Figure 2 ;

[0029] Figure 7 Schematic diagram of an explosion of a ground resistance tester according to an embodiment of the present invention Figure 1 ;

[0030] Figure 8 Schematic diagram of an explosion of a ground resistance tester according to an embodiment of the present invention Figure 2 .

[0031] The markings in the figure are: 1. Tester body; 2. Partition; 3. Support foot; 4. Support column; 5. Pin; 6. Conical gear sleeve; 7. First conical gear; 8. Screw; 9. Pulley; 10. Belt; 11. Brake servo motor; 12. Second conical gear; 13. Limit rod; 14. Positioning plate; 15. Limit block; 16. Movable cavity; 17. Pressure plate; 18. Card sleeve; 19. Card plate; 20. Pull handle; 21. Card slot; 22. Reset spring; 23. Double-headed motor; 24. Third conical gear; 25. Fourth conical gear; 26. Mounting cylinder; 27. Winding cylinder; 28. Movable block; 29. ​​Telescopic airbag; 30. Air pipe; 31. Inflatable airbag; 32. Card block; 33. Card hole. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0033] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] See also Figures 1 to 8 The present invention provides a technical solution: a ground resistance tester, comprising a tester body 1, a partition 2 is arranged inside the tester body 1, four right-angled turns at the bottom of the tester body 1 are provided with supporting feet 3, the tester comprises a fixed isolation mechanism and a hanging and winding mechanism, the fixed isolation mechanism also comprises a lifting and positioning module and a strengthening balance module, the lifting and positioning module can drive four groups of support columns 4 to rise and fall synchronously, so that the pins 5 at the bottom of the support columns 4 are stably inserted on the ground, so as to realize the isolation of the tester body 1 from the ground environment, and the strengthening balance module can adjust the lifting height of the support columns 4 separately, so that the tester body 1 can be placed in a balanced manner on the inclined ground environment;

[0035] The hanging and winding mechanism includes a hanging assembly module and an automatic winding module. The hanging assembly module can utilize the working process of the lifting and positioning module to disassemble and assemble the winding drum 27, so that the hanging of the winding drum 27 just fits the change in the height of the support column 4. The automatic winding module can make the hanging winding drum 27 rotate to realize the automatic winding of the wire.

[0036] As an embodiment of the present invention, Figure 3 and Figure 6 as well as Figure 7As shown, the lifting and positioning module includes a support column 4 arranged inside the four right-angle turns of the tester body 1, a pin 5 is arranged at the bottom end of the support column 4, the support column 4 is threadedly connected with a conical gear sleeve 6, the conical gear sleeve 6 is rotatably connected to the inside of the support foot 3, the upper part of the conical gear sleeve 6 is meshed with a first conical gear 7, a screw rod 8 is fixedly connected between the two groups of first conical gears 7, the outer side of the screw rod 8 is fixedly connected with a pulley 9, and the two groups of pulleys 9 are connected by a belt 10 for transmission. A brake servo motor 11 is fixedly installed on one side of the partition 2, and a second bevel gear 12 is fixedly installed on the output shaft of the brake servo motor 11, and the second bevel gear 12 is meshed with one group of conical gear sleeves 6. When in use, the brake servo motor 11 is started, and the brake servo motor 11 drives the second bevel gear 12 to rotate. Because the second bevel gear 12 is meshed with a group of conical gear sleeves 6, the pulley 9 is meshed with the first Bevel gear 7, two groups of first bevel gears 7 are connected together by screw rod 8, so the second bevel gear 12 can drive two groups of bevel gear sleeves 6 to rotate at the same time, and then because the outer sides of the two groups of screw rods 8 are provided with pulleys 9, and the two groups of pulleys 9 are connected by belt 10 transmission, the second bevel gear 12 can drive four groups of bevel gear sleeves 6 to rotate at the same time, and finally, because the conical gear sleeves 6 are threadedly connected with the support column 4, the upper end of the support column 4 is restricted by the reinforced balance module and cannot rotate, so the four groups of support columns 4 are lifted and lowered at the same time, and the support column 4 drives the pin 5 at the bottom to separate from the support foot 3 and be inserted into the ground, which is conducive to driving the four groups of support columns 4 to lift and lower at the same time, not only can the tester main body 1 be more stably inserted into the ground through the pin 5, but also the tester main body 1 can be kept away from the ground by a certain height, reducing the influence of factors such as ground stray potential and humid environment on the tester main body 1.

[0037] As an embodiment of the present invention, Figure 2 and Figure 4 as well as Figure 7As shown, the enhanced balance module includes a limiting rod 13 sleeved inside the support column 4, a positioning plate 14 is provided at the upper end of the limiting rod 13, a limiting block 15 is provided at the upper end of the positioning plate 14, the positioning plate 14 is clamped in the active cavity 16, and a pressing plate 17 attached to the upper end of the positioning plate 14 is provided inside the active cavity 16. The pressing plate 17 passes through the tester body 1 through a clamping sleeve 18 and is fixedly connected with a clamping plate 19. The clamping plate 19 is clamped in a clamping slot 21 opened at the upper end of the tester body 1, the clamping plate 19 is adapted to the clamping slot 21, and the upper end of the clamping plate 19 is fixedly connected There is a pull handle 20, a return spring 22 is arranged between the upper end of the pressure plate 17 and the top of the movable chamber 16, and the return spring 22 is sleeved on the outside of the clamping sleeve 18. The outer side of the support column 4 and the inner side of the limiting rod 13 are both polygonal. The support column 4 and the limiting rod 13 are adapted. The outer side of the limiting block 15 is clamped with a pressure plate 17 and a clamping sleeve 18. The outer side of the limiting block 15 and the inner sides of the pressure plate 17 and the clamping sleeve 18 are all polygonal. First, pull the pull handle 20 upward with your fingers to disengage the clamping plate 19 from the clamping slot 21, and then turn the pull handle 20 to rotate the clamping plate 19. Because the outer side of the limiting block 15 and the inner sides of the pressure plate 17 and the clamping sleeve 18 are all polygonal and compatible, the limiting block 15 is fixedly connected to the limiting rod 13 through the positioning plate 14, and the outer side of the limiting rod 13 and the inner side of the support column 4 are all polygonal and compatible, so the clamping plate 19 drives the positioning plate 14 to rotate, and then because the brake servo motor 11 has a brake effect, the brake servo motor 11 makes the conical gear sleeve 6 not rotate with the support column 4, so that the support column 4 is lifted and lowered, and finally the handle 20 is released, and the restoring force of the reset spring 22 is released through the pressure plate 1 7 and the clamping sleeve 18 drive the clamping plate 19 to be clamped in the clamping groove 21 at the upper end of the tester body 1, so that the limiting rod 13 will not rotate, which is beneficial to utilize the braking effect of the braking servo motor 11 to prevent the four groups of conical gear sleeves 6 from rotating with the support column 4, and is convenient for adjusting the heights of the four groups of support columns 4 separately. Through the restoring force of the reset spring 22, the clamping plate 19 is stably clamped in the clamping groove 21 again, so that the limiting rod 13 will not rotate with the support column 4, which is convenient for ensuring the effect of the lifting and positioning module, so that the four groups of support columns 4 can be lifted and lowered at the same time.

[0038] As an embodiment of the present invention, Figure 3 and Figure 5 as well as Figure 8As shown, the automatic winding module includes a double-headed motor 23 arranged at the upper end of the partition 2, and the output shaft of the double-headed motor 23 is fixedly installed with a third bevel gear 24, and the third bevel gear 24 is meshed with a fourth bevel gear 25. The bottom end of the fourth bevel gear 25 passes through the partition 2 through a rotating shaft and is fixedly connected with a mounting cylinder 26. The bottom end of the mounting cylinder 26 is sleeved with a winding cylinder 27. The double-headed motor 23 is started, and the double-headed motor 23 drives the third bevel gear 24 to rotate. Then, because the third bevel gear 24 is meshed with the fourth bevel gear 25, and the bottom end of the fourth bevel gear 25 is fixedly connected with the mounting cylinder 26, the third bevel gear 24 drives the mounting cylinder 26 to rotate. Then, because the outer side of the mounting cylinder 26 is fixedly installed with a winding cylinder 27 through the hanging assembly module, the double-headed motor 23 can drive the winding cylinder 27 to automatically wind up the wire, which is conducive to cooperating with the hanging assembly module to drive the winding cylinder 27 to rotate, so that the winding cylinder 27 can quickly wind up the wire.

[0039] As an embodiment of the present invention, Figure 5 and Figure 6 as well as Figure 8As shown, the hanging assembly module includes an expansion airbag 31 arranged inside the mounting tube 26, a clamping block 32 is attached to the outer side of the expansion airbag 31, the outer side of the clamping block 32 passes through the mounting tube 26 and is clamped in the clamping hole 33, the clamping hole 33 is provided on the winding drum 27, the upper end of the expansion airbag 31 is fixedly connected to one end of the air supply pipe 30, the other end of the air supply pipe 30 passes through the fourth bevel gear 25 and the mounting tube 26 and is fixedly connected to a telescopic airbag 29, one end of the telescopic airbag 29 is fixedly connected to the movable block 28, the movable block 28 is threadedly connected to the outer side of the screw rod 8, the other end of the telescopic airbag 29 is fixedly connected to the partition 2, the telescopic airbag 29 is sleeved on the outer side of the screw rod 8, one side of the movable block 28 is slidably connected to the partition 2, to realize the horizontal movement of the movable block 28, firstly, the winding drum 27 is sleeved on the outer side of the mounting tube 26, and then because the direction of the movable block 28 is limited by the partition 2 and can only be moved, the brake servo motor 11 is used to drive the four The process of the simultaneous descent of the group support columns 4 causes the movable block 28 connected to the screw rod 8 by threaded transmission to move, and then the movable block 28 drives the telescopic airbag 29 to be compressed, so that the gas in the telescopic airbag 29 enters the expansion airbag 31 through the gas pipe 30, and the expansion airbag 31 expands and drives the clamping block 32 to be clamped into the clamping hole 33, thereby fixing the winding drum 27. Finally, when the telescopic airbag 29 drives the telescopic airbag 29 to extend, the telescopic airbag 29 absorbs the gas in the expansion airbag 31 through the gas pipe 30, and then the winding drum 27 is rotated. The winding drum 27 presses the clamping block 32 into the installation cylinder 26 through the inner wall of the clamping hole 33, thereby removing the winding drum 27 with the wire wound thereon, which is conducive to controlling the telescopic airbag 29 to be extended and retracted by the operation process of the lifting and positioning module, and is convenient for disassembling and assembling the winding drum 27. In addition, the elevation of the tester main body 1 just reserves a hanging space for the winding drum 27, which is convenient for placing the tester main body 1 on the ground to reel in the wire.

[0040] Working principle: When in use, start the brake servo motor 11, and the brake servo motor 11 drives the second bevel gear 12 to rotate. Because the second bevel gear 12 is meshed with a group of bevel gear sleeves 6, and the pulley 9 is meshed with the first bevel gear 7, and the two groups of first bevel gears 7 are connected together through the screw rod 8, the second bevel gear 12 can drive the two groups of bevel gear sleeves 6 to rotate at the same time, and then because the outer sides of the two groups of screw rods 8 are provided with pulleys 9, and the two groups of pulleys 9 are connected through the belt 10 transmission, the second bevel gear 12 can drive the four groups of bevel gear sleeves 6 to rotate at the same time. Finally, because the conical gear sleeve 6 is threadedly connected to the support column 4, the upper end of the support column 4 is restricted by the reinforced balance module and cannot rotate, so the four groups of support columns 4 are lifted and lowered at the same time, and the support column 4 drives the pin 5 at the bottom to disengage the support leg 3 and insert it on the ground;

[0041] Pull the handle 20 upward with your fingers to disengage the card plate 19 from the slot 21, and then turn the handle 20 to rotate the card plate 19. Because the outer side of the limiting block 15 and the inner sides of the pressure plate 17 and the clamping sleeve 18 are all polygonal and compatible, the limiting block 15 is fixedly connected to the limiting rod 13 through the positioning plate 14, and the outer side of the limiting rod 13 and the inner side of the support column 4 are all polygonal and compatible, so the card plate 19 drives the positioning plate 14 to rotate. Then, because the brake servo motor 11 has a brake effect, the brake servo motor 11 prevents the conical gear sleeve 6 from rotating with the support column 4, thereby causing the support column 4 to rise and fall. Finally, release the handle 20, and the restoring force of the reset spring 22 drives the card plate 19 to be clamped in the slot 21 at the upper end of the tester body 1 through the pressure plate 17 and the clamping sleeve 18, so that the limiting rod 13 does not rotate.

[0042] The double-headed motor 23 is started, and the double-headed motor 23 drives the third bevel gear 24 to rotate. Then, because the third bevel gear 24 is meshed with the fourth bevel gear 25, and the bottom end of the fourth bevel gear 25 is fixedly connected with the mounting cylinder 26, the third bevel gear 24 drives the mounting cylinder 26 to rotate. Then, because the outer side of the mounting cylinder 26 is fixedly installed with a winding cylinder 27 through a hanging assembly module, the double-headed motor 23 can drive the winding cylinder 27 to automatically wind up the wire.

[0043] The winding drum 27 is sleeved on the outside of the mounting tube 26. Then, because the direction of the movable block 28 is restricted by the partition 2 and can only be moved, the brake servo motor 11 is used to drive the four groups of support columns 4 to descend simultaneously, so that the movable block 28 connected to the screw rod 8 by threaded transmission is moved, and then the movable block 28 drives the telescopic airbag 29 to be compressed, so that the gas in the telescopic airbag 29 enters the expansion airbag 31 through the air supply pipe 30. The expansion of the expansion airbag 31 drives the clamping block 32 to be clamped in the clamping hole 33, thereby fixing the winding drum 27. Finally, when the telescopic airbag 29 drives the telescopic airbag 29 to extend, the telescopic airbag 29 absorbs the gas in the expansion airbag 31 through the air supply pipe 30, and then the winding drum 27 is rotated. The winding drum 27 presses the clamping block 32 into the mounting tube 26 through the inner wall of the clamping hole 33, thereby removing the winding drum 27 wrapped with the wire.

[0044] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0045] The present invention is intended to cover all such substitutions, modifications and changes that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ground resistance tester, comprising a tester body (1), a partition (2) is arranged inside the tester body (1), and four right-angled corners at the bottom of the tester body (1) are provided with supporting feet (3), characterized in that: The tester comprises a fixed isolation mechanism and a hanging and winding mechanism, the fixed isolation mechanism also comprises a lifting and positioning module and a strengthening balance module, the lifting and positioning module can drive four groups of support columns (4) to lift and lower synchronously, so that the pins (5) at the bottom ends of the support columns (4) are stably inserted on the ground, so as to achieve the isolation of the tester body (1) from the ground environment, the lifting and positioning module comprises a support column (4) arranged inside four right-angle turns of the tester body (1), the bottom end of the support column (4) is provided with a pin (5), the support column (4) is threadedly connected with a conical gear sleeve (6), the conical gear sleeve (6) is rotatably connected to the inside of the support foot (3), the upper part of the conical gear sleeve (6) is meshed with a first conical gear (7), a screw rod (8) is fixedly connected between two groups of the first conical gears (7), a pulley (9) is fixedly connected to the outer side of the screw rod (8), and the two groups of the pulleys (9) are connected by a belt (10) for transmission; A brake servo motor (11) is fixedly mounted on one side of the partition plate (2); a second bevel gear (12) is fixedly mounted on the output shaft of the brake servo motor (11); the second bevel gear (12) is meshed with one set of bevel gear sleeves (6); The enhanced balance module can independently adjust the lifting height of the support column (4), so that the tester body (1) can be placed in a balanced manner on an inclined ground environment; The enhanced balance module comprises a limiting rod (13) sleeved inside the support column (4), the outer side of the support column (4) and the inner side of the limiting rod (13) are both arranged in a polygonal manner, a positioning plate (14) is arranged at the upper end of the limiting rod (13), a limiting block (15) is arranged at the upper end of the positioning plate (14), the positioning plate (14) is clamped in the movable cavity (16), a pressing plate (17) attached to the upper end of the positioning plate (14) is arranged inside the movable cavity (16), the pressing plate (17) passes through the tester body (1) through a clamping sleeve (18) and is fixedly connected to a clamping plate (19), and the clamping plate (19) is clamped in a clamping slot (21) provided at the upper end of the tester body (1); A pressing plate (17) and a clamping sleeve (18) are clamped on the outer side of the limiting block (15); the outer side of the limiting block (15) and the inner sides of the pressing plate (17) and the clamping sleeve (18) are all arranged in a polygonal shape; A return spring (22) is provided between the upper end of the pressure plate (17) and the top end of the movable chamber (16), and the return spring (22) is sleeved on the outside of the clamping sleeve (18); The hanging and winding mechanism comprises a hanging assembly module and an automatic winding module, and the hanging assembly module can utilize the working process of the lifting and positioning module to disassemble and assemble the winding drum (27), so that the hanging of the winding drum (27) just fits the change in the height of the support column (4); The hanging assembly module comprises an expansion airbag (31) arranged inside the mounting tube (26); a clamping block (32) is attached to the outer side of the expansion airbag (31); the outer side of the clamping block (32) passes through the mounting tube (26) and is clamped in a clamping hole (33); the clamping hole (33) is provided on the winding tube (27); the upper end of the expansion airbag (31) is fixedly connected to one end of an air supply pipe (30); the other end of the air supply pipe (30) passes through the fourth bevel gear (25) and the mounting tube (26) and is fixedly connected to a telescopic airbag (29); one end of the telescopic airbag (29) is fixedly connected to a movable block (28); the movable block (28) is threadedly connected to the outer side of the screw rod (8); the other end of the telescopic airbag (29) is fixedly connected to the partition (2); The telescopic airbag (29) is sleeved on the outer side of the screw rod (8), and one side of the movable block (28) is slidably connected to the partition plate (2) to achieve horizontal movement of the movable block (28); The automatic winding module can cause the hanging winding drum (27) to rotate, thereby realizing automatic winding of the wire; The automatic winding module comprises a double-headed motor (23) arranged at the upper end of the partition (2); a third bevel gear (24) is fixedly mounted on the output shaft of the double-headed motor (23); the third bevel gear (24) is meshed with a fourth bevel gear (25); the bottom end of the fourth bevel gear (25) passes through the partition (2) via a rotating shaft and is fixedly connected to a mounting cylinder (26); the bottom end of the mounting cylinder (26) is sleeved with a winding cylinder (27).

2. A ground resistance tester according to claim 1, characterized in that: The clamping plate (19) is adapted to fit the clamping slot (21), and a handle (20) is fixedly connected to the upper end of the clamping plate (19).

3. A ground resistance tester according to claim 1, characterized in that: The support column (4) and the limiting rod (13) are matched.

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