CN110058085B

CN110058085B - Ground resistance tester

Info

Publication number: CN110058085B
Application number: CN201910382578.0A
Authority: CN
Inventors: 蔡宝虎
Original assignee: Nanjing Ligong Zhongbao Safety Technology Co ltd
Current assignee: Nanjing Ligong Zhongbao Safety Technology Co ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2021-02-02
Anticipated expiration: 2039-05-09
Also published as: CN110058085A

Abstract

The invention relates to a grounding resistance tester, wherein an auxiliary grounding point is arranged for electric power construction and engineering acceptance at present, a steel chisel is usually wedged into the ground in a hammering mode, the labor intensity is high, potential safety hazards exist, and a frozen soil layer is difficult to operate in winter. Technical scheme includes tester body and earth bar, the earth bar overcoat is equipped with supports the cover, the bilateral symmetry that supports the cover is equipped with the bracing piece, the bottom of bracing piece is equipped with the footboard, the earth bar includes screw thread section and spine section, support the cover top and rotate the swivel nut that is connected with screw thread section threaded connection, it is equipped with drive swivel nut pivoted drive arrangement to support the cover top, the both sides that support the cover are equipped with the guide bar along vertical direction symmetry, the earth bar top is fixed with the slider of being connected with the guide bar slides. During the use, operating personnel steps on the footboard, will support the cover fixed, and drive arrangement drive swivel nut rotates afterwards, and then the drive earth bar slides down, and spine portion can pierce ground, and alone can accomplish the operation of cuttage earth bar, has solved the difficult problem that cold areas winter measurement is difficult to set up interim ground point.

Description

Ground resistance tester

Technical Field

The invention relates to the technical field of grounding resistance detection equipment, in particular to a grounding resistance tester.

Background

In the maintenance process of the power system, a ground resistance tester needs to be used for testing the ground resistance of the power equipment, and during testing, the ground terminal of the ground resistance tester needs to be grounded. The common practice is to use a steel chisel as a grounding point and use an iron hammer and other tools to hammer into the ground deeper, but because the temperature is lower in winter in the north of China, the frozen soil layer on the ground surface is solid after being frozen, and the steel chisel is wedged into the ground and is difficult to pull out during field measurement.

Therefore, the utility model with the bulletin number of CN207624929U provides a grounding rod of a grounding resistance tester, the main body of the grounding rod consists of a screw rod section and a drill rod section, and a handle and a wiring terminal are connected with the upper end of the screw rod section; the connecting screw sleeve is in threaded connection with the lead screw section of the ground rod main body; two sides of the connecting threaded sleeve are respectively fixedly connected with a supporting rod, and the lower end of the supporting rod is fixedly connected with a pedal.

The existing ground resistance tester has two wires for testing, namely a 20-meter voltage wire and a 40-meter current wire. During detection, the two grounding probes are respectively inserted into the ground 20m and 40m away from the grounding body along the radiation direction of the grounding body, and because the length of the lead is longer, more time is consumed for pulling and retracting the lead during testing, great inconvenience is brought to the testing, and the working efficiency is reduced.

Disclosure of Invention

The invention aims to provide a grounding resistance tester which can conveniently realize the winding and unwinding of two wires.

The above object of the present invention is achieved by the following technical solutions: the utility model provides a ground resistance tester, includes the tester body, be on a parallel with the bottom surface rotation on the bottom surface of tester body and be connected with the rolling dish, roll up and be equipped with interior reel and outer reel with the pivot of rolling dish is coaxial on the rolling dish, outer reel is fixed on the rolling dish, interior reel rotates and sets up on the rolling dish, the pivot of interior reel cup joints and runs through the pivot of rolling dish with the pivot of rolling dish, be equipped with on the tester body and be used for driving rolling dish and interior reel pivoted driving medium.

Through adopting above-mentioned technical scheme, when wanting to accomodate the wire, the reel rotates in the driving medium drives earlier, with 20m wire rolling to the outer peripheral face of interior reel, 20m wire is located between interior reel and the outer reel promptly, and the driving medium redrives rolling dish afterwards and rotates, with 40m wire rolling to the outer peripheral face of outer reel on, can accomplish the rolling of wire, convenient operation.

The invention is further configured to: the driving medium is including the fixed first bevel gear that sets up at the pivot tip of rolling dish and the pivot tip of interior reel, this internal rotation of tester is connected with and corresponds first bevel gear engaged with second bevel gear, two second bevel gear sets up coaxially, rotate on the tester body and be connected with the drive shaft with second bevel gear's shaft hole complex, be equipped with the connection key in the drive shaft, be equipped with on the second bevel gear with connection key complex keyway, the drive shaft slides along its axis direction and sets up on the tester body and the connection key is only located a keyway in the same time.

Through adopting above-mentioned technical scheme, at the drive shaft slip in-process, the connecting key only lies in a keyway in the same time, and when the operation, the drive shaft that slides, insert the connecting key in the keyway of difference, can drive and correspond second bevel gear and rotate, and then drive rolling dish or interior reel rotate, realize the rolling of wire, only need a drive shaft can realize the drive, and it is very convenient to operate.

The invention is further configured to: and one ends of the inner winding drum and the outer winding drum, which are far away from the winding disc, extend outwards to form an annular baffle.

Through adopting above-mentioned technical scheme, ring baffle can play and block the effect, avoids the wire that the rolling is good to drop from interior reel and outer reel.

The invention is further configured to: the ground rod is sleeved with a supporting sleeve, supporting rods are symmetrically arranged on two sides of the supporting sleeve, a pedal is arranged at the bottom of each supporting rod, the ground rod comprises a thread section and a spine section, the top of the supporting sleeve is rotatably connected with a threaded sleeve in threaded connection with the thread section, a driving device for driving the threaded sleeve to rotate is arranged at the top of the supporting sleeve, guide rods are symmetrically arranged on two sides of the supporting sleeve along the vertical direction, and a sliding block connected with the guide rods in a sliding mode is fixed at the top of the ground rod.

Through adopting above-mentioned technical scheme, the user places the tester body subaerial, lets footboard and ground butt and step on the footboard, holds the support cover through the bracing piece for earth bar perpendicular to ground is placed, rotates through drive arrangement drive swivel nut, drives the earth bar through the thread engagement under the guide of guide bar, moves towards ground along vertical direction, until the earth bar inserts ground. Therefore, the grounding rod can be conveniently driven to be inserted into the ground, labor is saved, the insertion position is accurate, and the tester body can conveniently acquire grounding resistance data. Simultaneously because the thread end is the separation with the spine section, when convenient the earth bar that inserts, the earth bar irrotational, after the detection finishes, directly extracts the earth bar to it is convenient to take out the earth bar, removes the loaded down with trivial details of reversal earth bar from.

The invention is further configured to: the driving device comprises a driven bevel gear fixedly arranged on the peripheral surface of the screw sleeve, the driven bevel gear and the screw sleeve are coaxially arranged, a driving bevel gear meshed with the driven bevel gear is rotatably connected to the top surface of the supporting sleeve, the driving bevel gear is fixedly connected with a rotating shaft rotatably connected to the top of the supporting sleeve, and a driving piece for driving the rotating shaft to rotate is arranged at the top of the supporting sleeve.

By adopting the technical scheme, when in operation, the driving bevel gear is driven to rotate only by the driving piece, and the threaded sleeve can be driven to rotate.

The invention is further configured to: the driving piece comprises a bobbin sleeved outside the rotating shaft, the bobbin is connected with the rotating shaft through a one-way bearing, a pull rope is wound on the outer peripheral surface of the bobbin, and an elastic piece for driving the bobbin to reset after rotating is arranged on the supporting sleeve.

Through adopting above-mentioned technical scheme, the user stimulates the stay cord drive bobbin to rotate, and the bobbin drives the axis of rotation and rotates under one-way restriction rotation of one-way bearing to drive initiative bevel gear rotates, drives driven bevel gear through the bevel gear meshing, makes the swivel nut rotate, turns into linear motion with rotary motion through threaded connection, and light inserts ground rod into ground. After the insertion, a user only needs to loosen the pull rope, the bobbin can rotate under the driving of the elastic force of the elastic piece, the rotation of the bobbin is not limited by the one-way bearing at the moment, the rotating shaft is static, the bobbin rotates, the pull rope is wound back, and the next rotation of the thread insert is facilitated. Effectively simplifies the rotation process of the threaded sleeve, is convenient to operate and saves more labor when the ground rod is inserted.

The invention is further configured to: the elastic piece comprises an elastic rope wound outside the winding drum, one end of the elastic rope is fixed to the top of the supporting sleeve, and the other end of the elastic rope is fixed to the winding drum.

Through adopting above-mentioned technical scheme, adopt the elasticity rope as the elastic component, the elasticity rope flexibility is good, and tensile scope is long, realization bobbin that can be stable reset.

The invention is further configured to: the support sleeve is provided with a lubricating felt sleeve above the threaded sleeve, a coil is arranged in the lubricating felt sleeve, and a permanent magnet is arranged outside the lubricating felt sleeve on the threaded sleeve.

Through adopting above-mentioned technical scheme, when the swivel nut was rotatory, the coil rotated for the permanent magnet, and the magnetic field that the cutting permanent magnet produced generates heat because of moving the live electromotive force to effectively prevent lubricating oil and solidify, guarantee that lubricating oil can go deep into the threaded connection department of swivel nut and screw thread end, guarantee that the user can easily drive ground rod and insert ground.

The invention is further configured to: the plane of the guide rod is perpendicular to the plane of the support rod, the guide rod is rotatably arranged on the support sleeve, and a buckle for fixing the guide rod is arranged on the peripheral surface of the support sleeve.

Through adopting above-mentioned technical scheme, when wanting to accomodate the guide bar, the reversal guide bar lets the guide bar rotatory towards ground, normally accomodate whole tester can. Effectively reduced the volume of tester when accomodating, made the tester use more convenient.

The invention is further configured to: the grounding rod is sleeved at the top of the sliding block, and the sliding block and the grounding rod are fixed through a pin rod.

Through adopting above-mentioned technical scheme, when needs the earth bar rotatory, tear the pin rod off, can rotate the earth bar freely, after extracting the earth bar from ground, remove the fixed between earth bar and the slider, can rotate the earth bar this moment, with earth bar and swivel nut separation, when using once more, with the earth bar from the swivel nut screw in again can, need not the reverse swivel nut, can realize the reseing of earth bar.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the lead can be directly accommodated to the bottom of the tester body, and the carrying and the use are very convenient;

2. the ground rod is very convenient to insert into the ground and pull out, so that the test flow is simplified, and the detection efficiency is improved.

Drawings

FIG. 1 is a schematic view of the structure of the tester body of the present invention.

FIG. 2 is a cross-sectional view of the test meter of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic view of the ground rod installation of the present invention.

Fig. 5 is a transverse cross-sectional view of fig. 4.

Fig. 6 is an enlarged view of a portion B in fig. 5.

Fig. 7 is a longitudinal sectional view of fig. 4.

Fig. 8 is a schematic view of the installation of the lubricating felt cover of the present invention.

In the figure, 1, a tester body; 2. a winding disc; 21. an outer drum; 22. a baffle plate; 3. an inner drum; 4. a first bevel gear; 5. a second bevel gear; 51. a drive shaft; 511. a connecting bond; 52. a keyway; 6. a ground rod; 61. a threaded segment; 62. a spine section; 63. a slider; 7. a support sleeve; 71. a support bar; 711. a pedal; 72. an annular groove; 73. a guide bar; 74. buckling; 8. A threaded sleeve; 81. a driven bevel gear; 82. a convex ring; 83. lubricating a felt sleeve; 831. a coil; 84. a permanent magnet; 9. a drive bevel gear; 91. a rotating shaft; 10. a bobbin; 101. a one-way bearing; 102. an elastic cord; 103. and pulling a rope.

Detailed Description

The present invention is described in further detail below with reference to figures 1-8.

Referring to fig. 1 and 4, the ground resistance tester disclosed by the invention comprises a tester body 1 and two ground rods 6, wherein the ground rods 6 are connected with the tester body 1 through leads, one of the leads is 20m long and one is 40m long, a winding disc 2 is rotatably connected on the bottom surface of the tester body 1 in parallel with the bottom surface, the winding disc 2 is circularly arranged, a rotating shaft rotatably connected with the bottom surface of the tester body 1 is arranged in the center of the winding disc 2, an inner winding drum 3 and an outer winding drum 21 are coaxially arranged on the winding disc 2 and the rotating shaft of the winding disc 2, the inner winding drum 3 is arranged inside the outer winding drum 21, when in use, the inner winding drum 3 winds 20m leads, the outer winding drum 21 is 40m leads, the outer winding drum 21 is fixed on the winding disc 2, the inner winding drum 3 is rotatably arranged on the winding disc 2, the rotating shaft of the inner winding drum 3 is sleeved with the rotating shaft of the winding disc 2 and penetrates through the rotating shaft of the winding disc 2, the rotating shaft of the rotating inner winding drum 3 only rotates the inner winding disc, the rotating shaft of the rotating winding disc 2 only rotates the outer winding drum 21, and a transmission part for driving the winding disc 2 and the inner winding drum 3 to rotate is arranged on the tester body 1.

Referring to fig. 2 and fig. 3, when wanting to accomodate the wire, the driving medium drives interior reel 3 earlier and rotates, on the outer peripheral face of rolling up 20m wire to interior reel 3, 20m wire is located between interior reel 3 and the outer reel 21 promptly, and the driving medium drives rolling dish 2 again afterwards and rotates, on the outer peripheral face of rolling up 40m wire to outer reel 21, can accomplish the rolling of wire, convenient operation.

Referring to fig. 2 and 3, the transmission member includes two first bevel gears 4, the two first bevel gears 4 are respectively and fixedly disposed at an end portion of a rotating shaft of the winding disc 2 and an extending end of the rotating shaft of the inner winding drum 3, a second bevel gear 5 engaged with the corresponding first bevel gear 4 is rotatably connected in the tester body 1, the two second bevel gears 5 are coaxially disposed, a driving shaft 51 engaged with a shaft hole of the second bevel gear 5 is rotatably connected in the tester body 1, the driving shaft 51 simultaneously penetrates through the two second bevel gears 5, a connecting key 511 is disposed on the driving shaft 51, a key groove 52 engaged with the connecting key 511 is disposed in the shaft hole of the second bevel gear 5, the driving shaft 51 is slidably disposed on the tester body 1 along an axial direction thereof, during a sliding process of the driving shaft 51, the driving shaft 51 is always disposed in the shaft holes of the two second bevel gears 5, and during, the connecting key 511 is only located a keyway 52 in the same time, and when the operation, the drive shaft 51 that slides will connect the key 511 and insert in the keyway 52 of difference, can drive and correspond second bevel gear 5 and rotate, and then drive rolling dish 2 or interior reel 3 rotate, realize the rolling of wire, only need a drive shaft 51 can realize the drive, and it is very convenient to operate.

For improving the rolling effect, refer to fig. 2, avoid the wire to drop from interior reel 3 and outer reel 21, the outside extension of one end that rolling dish 2 was kept away from to interior reel 3 and outer reel 21 forms annular baffle 22, and annular baffle 22 can play the effect of blockking, avoids the good wire of rolling to drop from interior reel 3 and outer reel 21.

Referring to fig. 4, in order to facilitate the ground rod 6 to be inserted into the ground, a support sleeve 7 is sleeved outside the ground rod 6, support rods 71 are arranged on the support sleeve 7, the number of the support rods 71 is two, the support rods are symmetrically arranged on two sides of the support sleeve 7, and a pedal 711 abutting against the ground is arranged at the bottom of each support rod 71. The ground rod 6 comprises a threaded section 61 and a spike section 62, the spike section 62 being located below the threaded section 61 in use. The top of the support sleeve 7 is rotatably connected with a threaded sleeve 8, and the threaded sleeve 8 is arranged at the top of the support sleeve 7 and is in threaded connection with the threaded end of the grounding rod 6. Support 7 tops and be equipped with drive arrangement and supply user's drive swivel nut 8 to rotate, support the both sides of cover 7 and be equipped with guide bar 73 along vertical direction, the top of earth bar 6 is fixed with the slider 63 of being connected with guide bar 73 slides, and guide bar 73 is used for restricting earth bar 6 rotatory, guarantees that swivel nut 8 when rotatory, and earth bar 6 can slide along vertical direction.

Referring to fig. 4, the user places the tester body 1 on the ground, presses the pedal 711 against the ground and steps on the pedal 711, supports the support sleeve 7 through the support rod 71, places the ground rod 6 perpendicular to the ground, drives the screw sleeve 8 to rotate through the driving device, and drives the ground rod 6 to move toward the ground in the vertical direction under the guidance of the guide rod 73 through the screw engagement until the ground rod 6 is inserted into the ground. Thereby realize convenient drive earth bar 6 and insert ground, use manpower sparingly, and insert the position accuracy, the tester body 1 of being convenient for acquires ground resistance data. Simultaneously because the thread end is the separation with spine section 62, when convenient inserting earth bar 6, earth bar 6 irrotational, after the detection finishes, directly extracts earth bar 6 to it is convenient to take out earth bar 6, removes the loaded down with trivial details of reversal earth bar 6 from.

Referring to fig. 5 and 6, a through hole is formed in the support sleeve 7 along the vertical direction, the top of the through hole is expanded outward to form an annular groove 72, and a convex ring 82 matched with the annular groove 72 is arranged on the bottom surface of the threaded sleeve 8. The screw sleeve 8 is rotatably connected with the supporting sleeve 7 under the matching of the convex ring 82 and the annular groove 72, the axis of the screw sleeve 8 is ensured to be coincided with the axis of the supporting sleeve 7, and then the axis of the grounding rod 6 is ensured to be coincided with the axis of the supporting sleeve 7, so that the grounding rod 6 is certainly positioned at the symmetric center of the two supporting rods 71, the grounding rod 6 is certainly inserted in a mode of being perpendicular to the ground, and the accuracy in ground resistance detection is improved.

Referring to fig. 6 and 8, a lubricating felt sleeve 83 is sleeved on the support sleeve 7 above the threaded sleeve 8, the lubricating felt sleeve 83 is sleeved on the support sleeve 7 after being soaked with lubricating oil, a coil 831 is arranged in the lubricating felt sleeve 83, a permanent magnet 84 is arranged on the threaded sleeve 8 and outside the lubricating felt sleeve 83, when the threaded sleeve 8 rotates, the coil 831 rotates relative to the permanent magnet 84 to cut a magnetic field generated by the permanent magnet 84, and the magnetic field is heated due to dynamic electromotive force, so that the lubricating oil is effectively prevented from being solidified, the lubricating oil can be guaranteed to penetrate into a threaded connection part between the threaded sleeve 8 and a threaded end, and a user can easily drive the grounding rod 6 to be inserted into the ground.

Referring to fig. 7, the driving device includes a driven bevel gear 81 fixed on the outer circumferential surface of the threaded sleeve 8, the axis of the driven bevel gear 81 coincides with the axis of the threaded sleeve 8, a driving bevel gear 9 is rotatably connected to the top surface of the support sleeve 7, the driving bevel gear 9 is engaged with the driven bevel gear 81, a rotating shaft 91 of the driving bevel gear 9 is rotatably connected to the top of the support sleeve 7 in a direction perpendicular to the axis of the threaded sleeve 8, and a driving member is provided on the top of the support sleeve 7 for a user to drive the driving bevel gear 9 to rotate. In operation, the driving bevel gear 9 is driven to rotate only through the driving part, and the threaded sleeve 8 can be driven to rotate.

Referring to fig. 7, the driving member includes a bobbin 10 sleeved on the rotating shaft 91, the bobbin 10 is connected to the rotating shaft 91 through a one-way bearing 101, a pull rope 103 is wound around the outer circumferential surface of the bobbin 10, and an elastic member is disposed on the support sleeve 7 for a user to drive the bobbin 10 to rotate reversely. The elastic piece is an elastic rope 102, one end of the elastic rope 102 is fixed with the top of the support sleeve 7, and the other end of the elastic rope 102 is fixed with the bobbin 10.

Referring to fig. 7, a user pulls a pull rope 103 to drive a bobbin 10 to rotate, an elastic rope 102 is stretched during rotation to accumulate elastic potential energy, the bobbin 10 drives a rotating shaft 91 to rotate under the unidirectional limited rotation of a unidirectional bearing 101, so as to drive a driving bevel gear 9 to rotate, a driven bevel gear 81 is driven through the meshing of the bevel gears to rotate a threaded sleeve 8, the rotating motion is converted into linear motion through threaded connection, and the grounding rod 6 is easily inserted into the ground. After the insertion, the user only needs to loosen the pull rope 103, the bobbin 10 rotates under the driving of the elastic force of the elastic rope 102, at this time, the one-way bearing 101 does not limit the rotation of the bobbin 10, the rotating shaft 91 is static, the bobbin 10 rotates, and the pull rope 103 is wound back to facilitate the next rotation of the thread insert 8. Effectively simplifies the rotation process of the threaded sleeve 8, is convenient to operate and saves more labor when the ground rod 6 is inserted.

Referring to fig. 4, in order to make the guide rod 73 storable, the plane of the guide rod 73 is perpendicular to the plane of the support rod 71, the guide rod 73 is rotatably disposed on the support sleeve 7, the guide rod 73 is rotatably connected with the support sleeve 7, the rotating shaft of the guide rod 73 is disposed parallel to the radial direction of the support sleeve 7, a buckle 74 is disposed on the outer circumferential surface of the support sleeve 7 beside the guide rod 73, the axis of the buckle 74 is disposed parallel to the axis of the support sleeve 7, when the guide rod 73 is desired to be stowed, the guide rod 73 is rotated toward the ground by reversing the guide rod 73, the guide rod 73 is clamped into the buckle 74, and the whole tester is normally stowed. Effectively reduced the volume of tester when accomodating, made the tester use more convenient.

Referring to fig. 4, in order to be able to manually rotate the ground rod 6 when the tester is stored, and shorten the length of the whole tester, the ground rod 6 is sleeved with the slider 63, a through hole is formed in the slider 63 in the direction perpendicular to the length direction of the ground rod 6, a pin rod penetrating through the through hole in the slider 63 is arranged at the top of the ground rod 6, and the pin rod penetrates through the slider 63 at the same time, so that the ground rod 6 and the guide rod 73 are connected in a sliding manner in the length direction of the sliding rod. When the grounding rod 6 is required to rotate, the pin rod is removed, the grounding rod 6 can be freely rotated, after the grounding rod 6 is pulled out of the ground, the fixing between the grounding rod 6 and the sliding block 63 is released, the grounding rod 6 can be rotated at the moment, the grounding rod 6 is separated from the threaded sleeve 8, when the grounding rod is used again, the grounding rod 6 is screwed in from the threaded sleeve 8 again, and the resetting of the grounding rod 6 can be realized without reversely rotating the threaded sleeve 8.

The implementation principle of the embodiment is as follows: when the conducting wire is required to be stored, the driving shaft 51 is rotated, the driving shaft 51 drives the inner winding drum 3 to rotate, the conducting wire of 20m is wound on the outer peripheral surface of the inner winding drum 3, namely the conducting wire of 20m is positioned between the inner winding drum 3 and the outer winding drum 21, then the driving shaft 51 is slid, so that the connecting key 511 and the inner core of the other second bevel gear 5 are driven to rotate, the winding disc 2 is driven to rotate by rotating the driving shaft 51, the conducting wire of 40m is wound on the outer peripheral surface of the outer winding drum 21, and the winding of the conducting wire can be completed, and the;

when erecting the grounding rod 6, a user places the tester body 1 on the ground, enables the pedal 711 to be abutted against the ground and the grounding rod 6 to be perpendicular to the ground, pulls the pull rope 103 to drive the bobbin 10 to rotate, drives the rotating shaft 91 to rotate through the one-way bearing 101, drives the threaded sleeve 8 to rotate through the engagement of the driving bevel gear 9 and the driven bevel gear 81, drives the grounding rod 6 to slide towards the ground in the vertical direction under the guidance of the guide rod 73 through threaded engagement, and inserts the grounding rod into the ground; the whole tester can be directly pulled out after the detection is finished, the grounding rod 6 does not need to be reversely rotated, and the use is convenient.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a ground resistance tester, includes tester body (1), its characterized in that: the tester comprises a tester body (1), wherein a winding disc (2) is rotatably connected to the bottom surface of the tester body in parallel with the bottom surface, an inner winding drum (3) and an outer winding drum (21) are coaxially arranged on the winding disc (2) and a rotating shaft of the winding disc (2), the outer winding drum (21) is fixed on the winding disc (2), the inner winding drum (3) is rotatably arranged on the winding disc (2), the rotating shaft of the inner winding drum (3) is sleeved with the rotating shaft of the winding disc (2) and penetrates through the rotating shaft of the winding disc (2), and a transmission part for driving the winding disc (2) and the inner winding drum (3) to rotate is arranged on the tester body (1);

still include earth bar (6), earth bar (6) overcoat is equipped with supports cover (7), the bilateral symmetry of supporting cover (7) is equipped with bracing piece (71), and the bottom of bracing piece (71) is equipped with footboard (711), earth bar (6) are including screw thread section (61) and spine section (62), support cover (7) top rotation and be connected with swivel nut (8) with screw thread section (61) threaded connection, support cover (7) top and be equipped with drive swivel nut (8) pivoted drive arrangement, the both sides of supporting cover (7) are equipped with guide bar (73) along vertical direction symmetry, earth bar (6) top is fixed with slider (63) of being connected with guide bar (73) slide.

2. The ground resistance tester of claim 1, wherein: the driving medium is including fixed first bevel gear (4) that sets up the pivot tip of rolling dish (2) and the pivot tip of interior reel (3), tester body (1) internal rotation is connected with and corresponds second bevel gear (5) of first bevel gear (4) meshing, two second bevel gear (5) coaxial setting, rotate on tester body (1) and be connected with shaft hole complex drive shaft (51) with second bevel gear (5), be equipped with connection key (511) on drive shaft (51), be equipped with on second bevel gear (5) with connection key (511) complex keyway (52), drive shaft (51) slide along its axis direction and set up on tester body (1) and connection key (511) only are located a keyway (52) in the same time.

3. The ground resistance tester of claim 2, wherein: one ends, far away from the winding disc (2), of the inner winding drum (3) and the outer winding drum (21) extend outwards to form annular baffles (22).

4. The ground resistance tester of claim 1, wherein: the driving device comprises a driven bevel gear (81) fixedly arranged on the outer peripheral surface of a threaded sleeve (8), the driven bevel gear (81) and the threaded sleeve (8) are coaxially arranged, a driving bevel gear (9) meshed with the driven bevel gear (81) is rotatably connected to the top surface of a supporting sleeve (7), the driving bevel gear (9) is fixedly connected with a rotating shaft rotatably connected with the top of the supporting sleeve (7), and a driving piece for driving the rotating shaft to rotate is arranged at the top of the supporting sleeve (7).

5. The ground resistance tester of claim 4, wherein: the driving piece comprises a bobbin (10) sleeved outside the rotating shaft, the bobbin (10) is connected with the rotating shaft through a one-way bearing (101), a pull rope (103) is wound on the outer peripheral surface of the bobbin (10), and an elastic piece for driving the bobbin (10) to reset after rotation is arranged on the supporting sleeve (7).

6. The ground resistance tester of claim 5, wherein: the elastic piece comprises an elastic rope (102) wound outside the bobbin (10), one end of the elastic rope (102) is fixed to the top of the supporting sleeve (7), and the other end of the elastic rope (102) is fixed to the bobbin (10).

7. The ground resistance tester of claim 1 or 4, wherein: the supporting sleeve (7) is provided with a lubricating felt sleeve (83) above the threaded sleeve (8), a coil (831) is arranged in the lubricating felt sleeve (83), and a permanent magnet (84) is arranged outside the lubricating felt sleeve (83) on the threaded sleeve (8).

8. The ground resistance tester of claim 7, wherein: the plane of the guide rod (73) is perpendicular to the plane of the support rod (71), the guide rod (73) is rotatably arranged on the support sleeve (7), and a buckle (74) for fixing the guide rod (73) is arranged on the outer peripheral surface of the support sleeve (7).

9. The ground resistance tester of claim 8, wherein: the grounding rod (6) is sleeved on the top of the sliding block (63), and the sliding block (63) and the grounding rod (6) are fixed through a pin rod.