Electrical grounding resistance detection device

Abstract

The invention relates to the technical field of resistance detection, and discloses an electrical grounding resistance detection device which comprises a detector, the bottom of the detector is connected with a wire arrangement box, the bottom of the wire arrangement box is connected with a bottom box, a drawer is arranged in the bottom box, two probes are placed in the drawer, each probe comprises a bearing seat, and the bearing seats are connected with the wire arrangement box. The probe further comprises a hammering assembly used for hammering the probe into soil. The extrusion assembly is used for extruding conductive paste; and the rotating assembly is used for driving the probe to rotate. Through the arrangement of the wire arrangement box, the three wires can be neatly wound in the wire arrangement box, and winding among the wires is avoided; through the arrangement of the hammering assembly, the effect of adaptively adjusting the number of knocking times according to the soil softness is achieved, automatic knocking is achieved, the situation that when a hammer is manually used for knocking, the knocking force is not accurate, the knocking direction is inclined, and consequently the probe and the hand are injured is avoided, and the use convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of resistance detection, and particularly relates to an electrical grounding resistance detection device. Background Art

[0002] An electrical grounding resistance detection device is a key equipment for measuring the resistance value of a grounding system. Its core function is to evaluate the safety and effectiveness of the grounding device to ensure that the grounding resistance of the power system, building or industrial equipment meets the safety standards. This device usually consists of a high-precision measurement module, a control unit, a display module, a power supply module and test terminals. It adopts microprocessor technology to achieve intelligent operation. Its working principle is based on the three-electrode method or four-electrode method measurement principle. By injecting an alternating test current with a specific frequency into the grounding body and simultaneously detecting the voltage difference between the grounding body and the auxiliary electrode, the grounding resistance value is calculated according to Ohm's law. This device is widely used in fields such as power transmission and distribution networks, communication base stations, building lightning protection systems, petrochemical facilities and rail transit, etc., providing a reliable basis for the regular detection, project acceptance and fault troubleshooting of the grounding system. Its measurement data is of great value for preventing electric shock accidents and ensuring the stable operation of equipment.

[0003] However, in the prior art, the following problems exist: 1. In actual use of the prior art, since the detection instrument includes multiple wires and probes, the wires are often entangled during use. And the wires are usually laid and wound manually, the operation is rather troublesome, and it is also inconvenient to store and carry multiple wires and probes.

[0004] 2. The probe is usually hammered into the soil manually by workers. When hammering, due to inaccurate grasping of the hammering force and direction, the probe may be skewed. When hammering in soft soil, the probe may be inserted too deep due to excessive hammering force. There is also a risk of accidentally injuring the hand during manual hammering, and at the same time, it increases the labor intensity of the workers. Summary of the Invention

[0005] The purpose of the present invention is to provide an electrical grounding resistance detection device to solve the above problems, aiming to overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: An electrical grounding resistance detection device provided by the present invention includes a detector. A wire management box is connected to the bottom of the detector, and a bottom box is connected to the bottom of the wire management box. A drawer is arranged inside the bottom box, and two probes are placed in the drawer. The two ends of the probe are respectively set as a conical end and a connection end. The probe includes a receiving seat which is rotatably connected to the connection end of the probe. Two convex rods are connected to the outer wall of the receiving seat, and the two convex rods are arranged in a mirror image. The probe further includes a hammering component for driving the probe into the soil, an extrusion component for extruding conductive paste, and a rotating component for driving the probe to rotate. The hammering component includes a hollow column which is connected to the side of the receiving seat away from the probe. A first hammer block, a second hammer block, and a third hammer block are slidably sleeved on the hollow column. An annular plate is connected to the side of the receiving seat close to the probe.

[0007] Preferably, a rotating shaft is rotatably connected to the inside of the wire management box. One end of the rotating shaft is provided with a turning handle, and the turning handle of the rotating shaft is located outside the wire management box. Three wire winding drums are rotatably connected to the outer wall of the rotating shaft through damping rings. Wires are wound on the wire winding drums. One end of each wire is connected with a clamp, and the other end of each wire is connected with a connector. The wires penetrate and slidably connect with the wire winding drums. Both the clamp and the connector are located outside the wire management box.

[0008] Preferably, a sleeve is slidably connected to the outer wall of the hollow column. A spring is arranged between the sleeve and the receiving seat. A partition is connected to the inner wall of the hollow column. A first connecting rod and a second connecting rod are respectively connected to both sides of the partition through a plurality of springs. A first wedge-shaped block and a first ball-headed rod are respectively connected to the outer surfaces of both ends of the first connecting rod. A second wedge-shaped block and a second ball-headed rod are respectively connected to the outer surfaces of both ends of the second connecting rod.

[0009] Preferably, the first wedge-shaped block, the first ball-headed rod, the second wedge-shaped block, and the second ball-headed rod all penetrate and slidably connect with the outer wall of the hollow column. The first ball-headed rod is located below the sleeve, and the second ball-headed rod is located below the first ball-headed rod. The first wedge-shaped block abuts against the lower part of the second hammer block, and the second wedge-shaped block abuts against the lower part of the third hammer block.

[0010] Preferably, a top frame is connected to the end of the hollow column away from the receiving seat. Two pulleys and two guide rings are installed on the top frame. The two guide rings are respectively located below the two pulleys. Two pull ropes are connected to the outer wall of the first hammer block. The two pull ropes respectively pass through the two guide rings of the top frame, and the two pull ropes respectively contact with the two pulleys of the top frame. A pull ring is arranged at the end of the pull rope away from the first hammer block. The pull rings of the two pull ropes are respectively sleeved on the two convex rods. Convex blocks are respectively arranged on the sides of the first hammer block and the second hammer block away from the sleeve. The convex block of the second hammer block contacts the convex block of the first hammer block, and the convex block of the third hammer block contacts the convex block of the second hammer block.

[0011] Preferably, the extrusion assembly includes an inner shaft which is slidably connected through the inner wall of the receiving seat. A neck groove is provided in the middle of the inner shaft. Two right-angle rods are connected to one side of the sleeve close to the receiving seat. Two long grooves are provided on the hollow column. The two right-angle rods are respectively slidably connected through the two long grooves of the hollow column. The ends of the two right-angle rods away from the sleeve are both connected to the inner shaft. A liquid chamber is provided inside the receiving seat. Two pistons are slidably connected through the inner wall of the liquid chamber. The ends of the two pistons away from the liquid chamber are both in sliding contact with the neck groove. A return spring is provided on the piston. A flow channel is provided inside one of the convex rods. A liquid pipe is connected between the flow channel and the liquid chamber.

[0012] Preferably, a one-way air inlet and a liquid injection port are provided on the receiving seat. A one-way valve is provided in the flow channel. A plurality of through grooves are provided on the flow channel and penetrate through the convex rod.

[0013] Preferably, the rotation assembly includes two balls which are both provided on the outer wall of the inner shaft. An internal thread groove is provided on the inner wall of the probe. The two balls are both slidably connected to the internal thread groove.

[0014] Preferably, a fixing seat is connected to one side of the receiving seat close to the probe. Four scraping strips are slidably connected to the side of the fixing seat away from the receiving seat. Four spring seats are connected to the side of the fixing seat away from the receiving seat. Springs are respectively provided between the four spring seats and the four scraping strips. Four triangular grooves are provided on the outer wall of the probe. The four triangular grooves are arranged in a circumferential array. The four scraping strips are respectively attached to the four triangular grooves.

[0015] The beneficial effects are as follows: 1. For this electrical grounding resistance detection device, through the setting of the wire management box, the three wires can be neatly wound in the wire management box, avoiding entanglement between the wires. The three wire winding drums and the rotating shaft can quickly wind the three wires through cooperation, improving the winding efficiency and convenience. The bottom box and the drawer are used for probe storage, which is convenient for carrying.

[0016] 2. The electrical grounding resistance detection device, through the setting of the hammering component, enables the spring between the sleeve and the receiving seat to contract by different strokes according to the softness of the soil. When the probe is inserted into relatively soft soil, the first hammer block can make the probe in place with one hammer strike. As the soil compactness increases, the second hammer block and the third hammer block can provide subsequent impacts to push the probe into place, achieving the effect of adaptively adjusting the number of hammer strikes according to the softness of the soil, realizing automatic hammering, and avoiding the situations of inaccurate hammering force and skewed hammering direction when manually using a hammer to strike, which may cause damage to the probe and injury to the hand, thus improving the convenience of use; through the setting of two pull ropes, when the staff arranges and retrieves the probe, the pull ropes can be used to start the hammering operation and reset the first hammer block, with convenient operation and avoiding the risk of finger pinching when the staff touches the first hammer block, the second hammer block, and the third hammer block with their hands.

[0017] 3. The electrical grounding resistance detection device, through the setting of the extrusion component, when the probe is arranged, the conductive paste in the liquid chamber is transported through the liquid pipe, the flow channel, and multiple through grooves and adheres to the surface of one of the convex rods, so that a layer of conductive paste adheres to the surface of the convex rod, which can reduce the contact resistance between the clamp and the convex rod, reduce measurement interference, and improve the accuracy of grounding resistance detection.

[0018] 4. The electrical grounding resistance detection device, through the setting of the rotating component, when the inner shaft moves, the two ball bearings drive the probe to rotate through the cooperation with the internal thread groove, so that the probe can rotate when inserted into and pulled out of the soil, thereby loosening the surrounding soil and making it easier for the probe to be inserted into and pulled out of the soil; when the probe rotates, it can also be self-cleaned through the cooperation with the four scraping strips, avoiding more soil adhering to the surface of the probe and reducing the cleaning work of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the wire management box of the present invention; Figure 3 is the structural schematic diagram of the hammering component of the present invention; Figure 4 is the structural schematic diagram of the pull rope of the present invention; Figure 5It is a schematic diagram of the hollow column structure of the present invention; Figure 6 It is a schematic diagram of the first wedge block structure of the present invention; Figure 7 It is a schematic diagram of the partition structure of the present invention; Figure 8 It is a schematic diagram of the extrusion assembly structure of the present invention; Figure 9 It is a schematic diagram of the liquid tank structure of the present invention; Figure 10 It is a schematic diagram of the rotating assembly structure of the present invention; Figure 11 It is a schematic diagram of the scraping strip structure of the present invention; Figure 12 It is a schematic diagram of the triangular groove structure of the present invention.

[0021] Explanation of reference numerals is as follows: 1, detector; 2, wire management box; 21, rotating shaft; 22, wire winding drum; 23, wire; 231, clamp; 232, joint; 3, bottom box; 31, drawer; 4, probe; 5, receiving seat; 51, annular plate; 6, convex rod; 7, hammering assembly; 71, hollow column; 72, sleeve; 73, first hammer block; 74, second hammer block; 75, third hammer block; 76, top frame; 77, pulling rope; 78, partition; 79, first connecting rod; 710, first wedge block; 711, first ball head rod; 712, second connecting rod; 713, second wedge block; 714, second ball head rod; 8, extrusion assembly; 81, right-angle rod; 82, inner shaft; 83, neck groove; 84, liquid tank; 85, piston; 86, liquid pipe; 87, flow channel; 88, through groove; 9, rotating assembly; 91, internal thread groove; 92, ball; 93, fixed seat; 94, scraping strip; 95, spring seat; 96, triangular groove. Detailed implementation manners

[0022] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present invention belong to the scope protected by the present invention.

[0023] Embodiment 1 Please refer to Figure 1 - Figure 2, An electrical grounding resistance detection device, including a detector 1. The bottom of the detector 1 is connected to a wire management box 2. The bottom of the wire management box 2 is connected to a bottom box 3. A drawer 31 is arranged inside the bottom box 3. Two probes 4 are placed inside the drawer 31. The bottom box 3 and the drawer 31 are used for storing the probes 4, which is convenient for carrying. The two ends of the probe 4 are respectively set as a conical end and a connection end. The conical end of the probe 4 is used for inserting into the soil. The probe 4 includes a receiving seat 5. The receiving seat 5 is rotatably connected to the connection end of the probe 4. Two convex rods 6 are connected to the outer wall of the receiving seat 5. The two convex rods 6 are arranged in a mirror image; A rotating shaft 21 is rotatably connected inside the wire management box 2. One end of the rotating shaft 21 is provided with a rotating handle. The rotating handle of the rotating shaft 21 is located outside the wire management box 2. Three wire reels 22 are rotatably connected to the outer wall of the rotating shaft 21 through a damping ring. There is a certain resistance between the wire reel 22 and the rotating shaft 21 through the damping ring, so that the rotating shaft 21 can drive the wire reel 22 to rotate without being interfered by a certain degree of external force. A wire 23 is wound around the wire reel 22. One end of the wire 23 is connected to a clamp 231, and the other end of the wire 23 is connected to a connector 232. The wire 23 is slidably connected through the wire reel 22. Both the clamp 231 and the connector 232 are located outside the wire management box 2. A part of the wire 23 connected to the connector 232 has a surplus inside the wire management box 2 and can be manually stuffed back into the wire management box 2 after being pulled out. During detection, the staff pulls out the three clamps 231 and the three connectors 232. When the rotating shaft 21 rotates, it drives the three wire reels 22 to wind the three wires 23. Through the setting of the wire management box 2, the three wires 23 can be neatly wound in the wire management box 2, avoiding entanglement between the wires 23. The three wire reels 22 and the rotating shaft 21 can quickly wind the three wires 23 through cooperation, improving the winding efficiency and convenience.

[0024] Further, please refer to Figure 1 - Figure 7, the probe 4 further includes a hammering assembly 7 for driving the probe 4 into the soil; the hammering assembly 7 includes a hollow column 71, the hollow column 71 is connected to the side of the receiving seat 5 away from the probe 4, and a first hammer block 73, a second hammer block 74 and a third hammer block 75 are slidably sleeved on the hollow column 71. Under the guidance of the hollow column 71, the impact point is close to the center of the receiving seat 5 and the axis of the probe 4, avoiding the situation that the probe 4 is skewed due to impact deviation. A ring plate 51 is connected to the side of the receiving seat 5 close to the probe 4. A sleeve 72 is slidably connected to the outer wall of the hollow column 71. A spring is provided between the sleeve 72 and the receiving seat 5. When the receiving seat 5 is under pressure, the spring between the sleeve 72 and the receiving seat 5 contracts. The soil will generate a certain reaction force on the probe 4. The greater the reaction force, the longer the contraction stroke of the spring, and the smaller the reaction force, the shorter the contraction stroke of the spring. The softer the soil, the smaller the generated reaction force. A partition 78 is connected to the inner wall of the hollow column 71. The two sides of the partition 78 are respectively connected with a first connecting rod 79 and a second connecting rod 712 through a plurality of springs. The outer surfaces of both ends of the first connecting rod 79 are respectively connected with a first wedge block 710 and a first ball head rod 711. The outer surfaces of both ends of the second connecting rod 712 are respectively connected with a second wedge block 713 and a second ball head rod 714. The first wedge block 710, the first ball head rod 711, the second wedge block 713 and the second ball head rod 714 are all slidably connected through the outer wall of the hollow column 71. The first ball head rod 711 is located below the sleeve 72, the second ball head rod 714 is located below the first ball head rod 711, the first wedge block 710 abuts against the lower side of the second hammer block 74, the second wedge block 713 abuts against the lower side of the third hammer block 75, and the sides of the first wedge block 710 and the second wedge block 713 close to the sleeve 72 are both provided with inclined surfaces; through the setting of the hammering assembly 7, the spring between the sleeve 72 and the receiving seat 5 can contract with different strokes according to the softness of the soil. When the probe 4 is inserted into relatively soft soil, the first hammer block 73 can drive the probe 4 in place with one hammer blow. As the soil compactness increases, the second hammer block 74 and the third hammer block 75 can provide subsequent impacts, so as to push the probe 4 in place, achieving the effect of adaptively adjusting the number of hammer blows according to the softness of the soil, realizing automatic hammering, and avoiding the situation that when manually using a hammer to hammer, the hammering force is inaccurate and the hammering direction is skewed, resulting in the probe 4 and injuring the hand, improving the convenience of use.

[0025] Still further, please refer to Figure 3 - Figure 4, one end of the hollow column 71 away from the receiving seat 5 is connected with a top frame 76. Two pulleys and two guide rings are installed on the top frame 76. The two guide rings are respectively located below the two pulleys. Two pulling ropes 77 are connected to the outer wall of the first hammer block 73. The two pulling ropes 77 respectively pass through the two guide rings of the top frame 76. The two pulling ropes 77 respectively contact the two pulleys of the top frame 76. A pulling ring is arranged at one end of the pulling rope 77 away from the first hammer block 73. The pulling rings of the two pulling ropes 77 are respectively sleeved on the two convex rods 6. After removing the pulling rings of the two pulling ropes 77 from the two convex rods 6 and loosening the two pulling rings, the first hammer block 73 drops and impacts the sleeve 72. The sleeve 72 transmits the downward pressure to the receiving seat 5 and the probe 4 through the spring, so that the probe 4 drills into the soil. Convex blocks are respectively arranged on the surfaces of the first hammer block 73 and the second hammer block 74 away from the sleeve 72. The second hammer block 74 contacts the convex block of the first hammer block 73. The third hammer block 75 contacts the convex block of the second hammer block 74. Through the arrangement of the two pulling ropes 77, when the staff arranges and recovers the probe 4, the pulling ropes 77 can be used to start the knocking operation and reset the first hammer block 73, with convenient operation, and the risk of pinching fingers when the staff touches the first hammer block 73, the second hammer block 74 and the third hammer block 75 is avoided.

[0026] In addition, please refer to Figure 3 , Figure 8 - Figure 9, an extrusion assembly 8 for extruding conductive paste; the extrusion assembly 8 includes an inner shaft 82 which is slidably connected through the inner wall of the receiving seat 5, a neck groove 83 is provided in the middle part of the inner shaft 82, two right-angle rods 81 are connected to one side of the sleeve 72 close to the receiving seat 5, two long grooves are provided on the hollow column 71, and the two right-angle rods 81 are respectively slidably connected through the two long grooves of the hollow column 71. The ends of the two right-angle rods 81 away from the sleeve 72 are both connected to the inner shaft 82. A liquid chamber 84 is provided inside the receiving seat 5. A one-way air inlet and a liquid injection port are provided on the receiving seat 5. The staff injects the conductive paste into the liquid chamber 84 through the liquid injection port on the receiving seat 5, and part of the air is pumped into the liquid chamber 84 through the one-way air inlet of the receiving seat 5 to maintain the pressure balance in the liquid chamber 84. Two pistons 85 are slidably connected through the inner wall of the liquid chamber 84. The ends of the two pistons 85 away from the liquid chamber 84 are both in sliding contact with the neck groove 83. After the inner shaft 82 moves, the neck groove 83 pushes the two pistons 85 away from each other. A return spring is provided on the piston 85. A flow channel 87 is provided inside one of the convex rods 6. A liquid pipe 86 is connected between the flow channel 87 and the liquid chamber 84. After the two pistons 85 move towards the inside of the liquid chamber 84, they protrude from the inner wall of the liquid chamber 84, causing the pressure in the liquid chamber 84 to rise. A one-way valve is provided in the flow channel 87, and a plurality of through grooves 88 are provided on the flow channel 87. The through grooves 88 penetrate through the convex rod 6. Part of the conductive paste is squeezed into the flow channel 87 through the liquid pipe 86 by the positive pressure action of the liquid chamber 84. The flow channel 87 extrudes the excess conductive paste inside through the plurality of through grooves 88 onto the surface of the convex rod 6, so that a layer of conductive paste adheres to the surface of one of the convex rods 6. The staff clamps the clamp 231 on the convex rod 6 with the conductive paste attached, which can improve the conductive effect and thus improve the accuracy of resistance measurement. Through the setting of the extrusion assembly 8, when the probe 4 is arranged, the conductive paste in the liquid chamber 84 is transported through the liquid pipe 86, the flow channel 87 and the plurality of through grooves 88, and adheres to the surface of one of the convex rods 6, so that a layer of conductive paste adheres to the surface of the convex rod 6, which can reduce the contact resistance between the clamp 231 and the convex rod 6, reduce measurement interference, and improve the accuracy of grounding resistance detection.

[0027] It should be noted that, please refer to Figure 3 、 Figure 10, a rotating assembly 9 for driving the probe 4 to rotate; the rotating assembly 9 includes two balls 92, both of the two balls 92 are arranged on the outer wall of the inner shaft 82, an internal thread groove 91 is arranged on the inner wall of the probe 4, and both of the two balls 92 are slidably connected to the internal thread groove 91. The inner shaft 82 is limited and can only move reciprocally and cannot rotate. When the inner shaft 82 moves, it drives the two balls 92 to move synchronously. When the two balls 92 move, they slide along the internal thread groove 91 to drive the probe 4 to rotate. When the probe 4 is struck and drilled into the soil, the probe 4 itself can rotate, so as to loosen the soil around the probe 4 and improve the drilling efficiency. When the first hammer block 73 resets, the probe 4 rotates to loosen the surrounding soil again, making it easier to pull out the probe 4. Through the setting of the rotating assembly 9, when the inner shaft 82 moves, the two balls 92 drive the probe 4 to rotate through the cooperation with the internal thread groove 91, so that the probe 4 can rotate when inserting into and pulling out of the soil, thereby loosening the surrounding soil, making it easier for the probe 4 to insert into the soil and also easier to pull out.

[0028] It should be noted that, please refer to Figure 3 、 Figure 10 - Figure 12 , a fixing seat 93 is connected to the side of the receiving seat 5 close to the probe 4. Four scraping strips 94 are slidably connected to the side of the fixing seat 93 away from the receiving seat 5. Four spring seats 95 are connected to the side of the fixing seat 93 away from the receiving seat 5. Springs are respectively arranged between the four spring seats 95 and the four scraping strips 94. Four triangular grooves 96 are formed on the outer wall of the probe 4, and the four triangular grooves 96 are arranged in a circumferential array. The four scraping strips 94 are respectively in contact with the four triangular grooves 96. When the probe 4 rotates and contacts the four scraping strips 94, it can prevent more soil from adhering to its surface, thereby increasing the cleaning work of the staff. When the probe 4 is pulled out, if there is still some soil, the staff can manually press the sleeve 72, and it can also achieve the effect of self-cleaning of the probe 4 by rotating. When the probe 4 rotates, it can also perform self-cleaning through the cooperation with the four scraping strips 94, avoiding more soil adhering to the surface of the probe 4 and reducing the cleaning work of the staff.

[0029] With the above structure, the working principle of this case is as follows: during detection, the staff pulls out the three clamps 231 and the three connectors 232. A part of the wire 23 connected to the connector 232 has a surplus in the wire management box 2. After being pulled out, it can be manually stuffed back into the wire management box 2. A set of interfaces is provided on the detector 1, and the three connectors 232 are respectively connected to the corresponding interfaces. One of the clamps 231 is connected to the grounding wire to be detected, and the other two clamps 231 are respectively connected to the protruding rods 6 on the two probes 4. When taking in the wire, the rotating shaft 21 is rotated by turning the handle. The damping ring between the wire take-up reel 22 and the rotating shaft 21 has a certain resistance, so that the rotating shaft 21 can drive the wire take-up reel 22 to rotate without being disturbed by a certain degree of external force. The rotating shaft 21 drives the three wire take-up reels 22 to take in the three wires 23. Since the lengths of the three wires 23 are different, the clamp 231 on the wire 23 that is taken in first abuts against the outer wall of the wire management box 2. At this time, the clamp 231 stops the rotation of the wire take-up reel 22 through the wire 23. The rotating shaft 21 and the wire take-up reels 22 that have not completed taking in the wire continue to rotate until the three wire take-up reels 22 have all completed taking in the wire. The bottom box 3 and the drawer 31 are used for storing the probes 4, which is convenient for carrying. Through the setting of the wire management box 2, the three wires 23 can be neatly taken in the wire management box 2, avoiding entanglement between the wires 23. The three wire take-up reels 22 and the rotating shaft 21 can quickly take in the three wires 23 through cooperation, improving the wire take-up efficiency and convenience.

[0030] When inserting the probe 4 into the soil, the operator inserts the probe 4 into the soil through the handle on the top frame 76, and then manually removes the pull rings of the two pull ropes 77 from the two convex rods 6. After releasing the two pull rings, the first hammer block 73 drops and impacts the sleeve 72. The sleeve 72 transfers the downward pressure to the receiving seat 5 and the probe 4 through the spring, causing the probe 4 to drill into the soil. When the probe 4 is inserted into relatively soft soil, during the drilling process of the probe 4, the reaction force generated by the soil is relatively small, the probe 4 drills a longer distance under the impact force generated by the first hammer block 73, and the reaction force of the receiving seat 5 on the spring is also relatively small, resulting in a smaller compression stroke of the spring below the receiving seat 5. When the annular plate 51 contacts the soil, the annular plate 51 blocks the probe 4 and the receiving seat 5 from continuing to descend. At this time, the probe 4 reaches the required depth of insertion into the soil. When the soil is not soft enough, the reaction force generated by the soil is relatively large, causing the probe 4 not to be inserted to the required depth in one hammer strike. At this time, the reaction force of the receiving seat 5 on the spring increases, causing the sleeve 72 and the receiving seat 5 to continue to compress the spring. When the sleeve 72 contacts the first ball head rod 711, the sleeve 72 squeezes the first ball head rod 711 into the hollow column 71 along the spherical end of the first ball head rod 711. The first ball head rod 711 drives the first connecting rod 79 to approach the partition plate 78, and the first connecting rod 79 drives the first wedge block 710 to contract to the inner wall of the hollow column 71, so that the first wedge block 710 no longer abuts against the bottom of the second hammer block 74. The second hammer block 74 drops by gravity and impacts the first hammer block 74, thereby generating a second impact force, causing the probe 4 to drill into the soil again, so as to meet the depth requirement. When the soil is relatively compact, for the same principle, the distance between the receiving seat 5 and the sleeve 72 is further reduced. The sleeve 72 drives the second connecting rod 712 and the second wedge block 713 to approach the partition plate 78 through the second ball head rod 714, so that the second wedge block 713 no longer abuts against the third hammer block 75, causing the third hammer block 75 to make a third impact, causing the probe 4 to drill further, thus achieving the effect of adjusting the number of impacts according to the softness of the soil. And through the guidance of the hollow column 71, the impact point is close to the center of the receiving seat 5 and the axis of the probe 4, avoiding the situation of probe 4 skewing caused by impact deviation, and reducing the probability of the probe 4 bending. After the probe 4 is inserted, the clamp 231 is clamped on one of the convex rods 6. When recovering the probe 4, the clamp 231 is loosened, and the two pull ropes 77 are pulled through the two pull rings, and the two pull rings are hung on the two convex rods 6 again. During this process, the two pull ropes 77 pull the first hammer block 73 back to the initial position through the guiding cooperation of the two guide rings and the two pulleys. The first hammer block 73 drives the second hammer block 74 and the third hammer block 75 to reset. When the third hammer block 75 resets, it contacts the inclined surfaces of the first wedge block 710 and the second wedge block 713. The first wedge block 710 and the second wedge block 713 contract, and finally the third hammer block 75 returns above the second wedge block 713. Similarly, the second hammer block 74 returns above the first wedge block 710. There is a certain gap between the first hammer block 73 and the second hammer block 74 due to the convex block on the first hammer block 73.The first wedge block 710 is located beside the convex block of the first hammer block 73. Similarly, the second wedge block 713 is located beside the convex block of the second hammer block 73. Subsequently, the staff pulls out the probe 4 through the handle of the top frame 76. Through the setting of the hammering assembly 7, the spring between the sleeve 72 and the receiving seat 5 can shrink by different strokes according to the softness of the soil. When the probe 4 is inserted into relatively soft soil, the first hammer block 73 can hammer once to make the probe 4 in place. As the soil compactness increases, the second hammer block 74 and the third hammer block 75 can provide subsequent impacts to push the probe 4 into place, achieving the effect of adaptively adjusting the number of hammering times according to the soil softness, realizing automatic hammering, and avoiding the situations of inaccurate hammering force and skewed hammering direction when manually using a hammer to hammer, which may cause damage to the probe 4 and injury to the hand, improving the convenience of use. Through the setting of the two pull ropes 77, when the staff arranges and retrieves the probe 4, the pull ropes 77 can be used to start the hammering operation and reset the first hammer block 73, with convenient operation, and avoiding the risk of pinching fingers when the staff touches the first hammer block 73, the second hammer block 74, and the third hammer block 75 with their hands.,

[0031] The liquid tank 84 is filled with conductive paste. The staff injects the conductive paste into the liquid tank 84 through the liquid injection port on the receiving seat 5. When the sleeve 72 moves, the sleeve 72 drives the inner shaft 82 to move synchronously through the two right-angle rods 81. When the inner shaft 82 is in the initial position, the two pistons 85 abut against the neck groove 83. After the inner shaft 82 moves, the neck groove 83 pushes the two pistons 85 in the direction away from each other. Then the pistons 85 abut against the outer wall of the inner shaft 82, and the inner shaft 82 continues to move, so that the two pistons 85 move toward the direction close to the inside of the liquid tank 84. The two pistons 85 protrude from the inner wall of the liquid tank 84, so that the pressure in the liquid tank 84 increases. The liquid tank 84 squeezes part of the conductive paste into the flow channel 87 through the liquid pipe 86 through the positive pressure. The flow channel 87 squeezes the excess conductive paste inside to the surface of the protruding rod 6 through a plurality of through grooves 88, so that a layer of conductive paste is attached to the surface of one of the protruding rods 6. The staff clamps the clamp 231 on the conductive paste The conductive paste on the protruding rod 6 can improve the conductive effect, thereby improving the accuracy of resistance measurement. When the first hammer block 73 is reset, the sleeve 72 is reset by the elastic force of the spring, and the inner shaft 82 is reset accordingly. After the inner shaft 82 is reset, the neck groove 83 slides between the two pistons 85 again, so that the two pistons 85 are reset by the elastic force of the reset spring. At this time, the one-way air inlet of the receiving seat 5 draws in part of the air to replenish the liquid tank 84 to maintain the pressure balance in the liquid tank 84. The one-way valve in the flow channel 87 allows the conductive paste in the flow channel 87 to flow only in one direction; through the setting of the extrusion component 8, when the probe 4 is arranged, the conductive paste in the liquid tank 84 is transported through the liquid pipe 86, the flow channel 87 and multiple through grooves 88, and adheres to the surface of one of the protruding rods 6, so that a layer of conductive paste is attached to the surface of the protruding rod 6, which can reduce the contact resistance between the clamp 231 and the protruding rod 6, reduce measurement interference, and improve the accuracy of ground resistance detection.

[0032] When the inner shaft 82 moves, it drives the two ball bearings 92 to move synchronously. The inner shaft 82 is limited and can only move back and forth, not rotate. When the two ball bearings 92 move, they slide along the internal thread groove 91 to drive the probe 4 to rotate. Since the inner shaft 82 only moves when knocking the probe 4 and resetting the first hammer block 73, when the probe 4 is knocked into the soil, the probe 4 itself can rotate, so as to loosen the soil around the probe 4 and improve the drilling efficiency. When the first hammer block 73 is reset, the probe 4 rotates to loosen the surrounding soil again, making it easier to pull out the probe 4; the fixing seat 93 limits the four scraping strips 94, and the four scraping strips 94 can only slide on the fixing seat 93. When the probe 4 is in the initial position, the four scraping strips 94 fit in the four triangular grooves 96. At this time, the four scraping strips 94 and the outer wall of the probe 4 form a cylindrical curved surface. When the probe 4 rotates, the triangular grooves 96 rotate accordingly and squeeze out the scraping strips 94 inside them, causing the scraping strips 94 to move towards the spring seat 95. The spring seat 95 keeps the scraping strips 94 applying a certain pressure on the surface of the probe 4 through the elastic force of the spring. Taking one of the scraping strips 94 as an example, when the probe 4 rotates one week, this scraping strip 94 slides along the surface of the probe 4 for one circle and enters the four triangular grooves 96 in turn. When the probe 4 rotates, it contacts the four scraping strips 94, which can prevent more soil from adhering to its surface, thus increasing the cleaning work of the staff. When the probe 4 is pulled out, if there is still some soil, the staff can manually press the sleeve 72, and it can also achieve the effect of self-cleaning of the probe 4 by rotating; through the setting of the rotating assembly 9, when the inner shaft 82 moves, the two ball bearings 92 drive the probe 4 to rotate through the cooperation with the internal thread groove 91, so that the probe 4 can rotate when inserting into and pulling out of the soil, thus loosening the surrounding soil and making it easier for the probe 4 to insert into and pull out of the soil; when the probe 4 rotates, it can also perform self-cleaning through the cooperation with the four scraping strips 94, avoiding more soil from adhering to the surface of the probe 4 and reducing the cleaning work of the staff.

[0033] As mentioned above, the above is only the specific implementation manner 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 can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An electrical grounding resistance detection device, comprising a detector (1), characterized in that: The bottom of the detector (1) is connected to a wire management box (2), the bottom of the wire management box (2) is connected to a bottom box (3), a drawer (31) is arranged in the bottom box (3), two probes (4) are placed in the drawer (31), both ends of the probe (4) are respectively arranged as a conical end and a connection end, the probe (4) includes a receiving seat (5), the receiving seat (5) is rotatably connected to the connection end of the probe (4), and two convex rods (6) are connected to the outer wall of the receiving seat (5), and the two convex rods (6) are arranged in a mirror image; The probe (4) further includes a hammering component (7) for driving the probe (4) into the soil; An extrusion component (8) for extruding conductive paste; A rotating component (9) for driving the probe (4) to rotate; The hammering component (7) includes a hollow column (71), the hollow column (71) is connected to the side of the receiving seat (5) away from the probe (4), a first hammer block (73), a second hammer block (74) and a third hammer block (75) are slidably sleeved on the hollow column (71), and an annular plate (51) is connected to the side of the receiving seat (5) close to the probe (4).

2. An electrical grounding resistance detection device according to claim 1, characterized in that: A rotating shaft (21) is rotatably connected inside the wire management box (2), one end of the rotating shaft (21) is provided with a turning handle, the turning handle of the rotating shaft (21) is located outside the wire management box (2), three wire winding drums (22) are rotatably connected to the outer wall of the rotating shaft (21) through a damping ring, a wire (23) is wound on the wire winding drum (22), one end of the wire (23) is connected to a clamp (231), the other end of the wire (23) is connected to a connector (232), the wire (23) is slidably connected through the wire winding drum (22), and both the clamp (231) and the connector (232) are located outside the wire management box (2).

3. The electrical grounding resistance detection device according to claim 2, wherein: A sleeve (72) is slidably connected to the outer wall of the hollow column (71), a spring is arranged between the sleeve (72) and the receiving seat (5), a partition plate (78) is connected to the inner wall of the hollow column (71), and both sides of the partition plate (78) are respectively connected to a first connecting rod (79) and a second connecting rod (712) through a plurality of springs. The outer surfaces of both ends of the first connecting rod (79) are respectively connected to a first wedge block (710) and a first ball head rod (711), and the outer surfaces of both ends of the second connecting rod (712) are respectively connected to a second wedge block (713) and a second ball head rod (714).

4. An electrical grounding resistance detection device according to claim 3, characterized in that: The first wedge block (710), the first ball head rod (711), the second wedge block (713) and the second ball head rod (714) are all slidably connected through the outer wall of the hollow column (71). The first ball head rod (711) is located below the sleeve (72), the second ball head rod (714) is located below the first ball head rod (711), the first wedge block (710) abuts against the lower part of the second hammer block (74), and the second wedge block (713) abuts against the lower part of the third hammer block (75).

5. An electrical grounding resistance detection device according to claim 4, characterized in that: One end of the hollow column (71) far from the receiving seat (5) is connected to a top frame (76). Two pulleys and two guide rings are installed on the top frame (76). The two guide rings are respectively located below the two pulleys. Two pulling ropes (77) are connected to the outer wall of the first hammer block (73). The two pulling ropes (77) respectively pass through the two guide rings of the top frame (76). The two pulling ropes (77) are respectively in contact with the two pulleys of the top frame (76). A pulling ring is arranged at one end of the pulling rope (77) far from the first hammer block (73). The pulling rings of the two pulling ropes (77) are respectively sleeved on the two convex rods (6). Convex blocks are respectively arranged on the sides of the first hammer block (73) and the second hammer block (74) far from the sleeve (72). The second hammer block (74) is in contact with the convex block of the first hammer block (73). The third hammer block (75) is in contact with the convex block of the second hammer block (74).

6. An electrical grounding resistance detection device according to claim 5, characterized in that: The extrusion assembly (8) includes an inner shaft (82). The inner shaft (82) is slidably connected through the inner wall of the receiving seat (5). A neck groove (83) is arranged in the middle part of the inner shaft (82). Two right-angle rods (81) are connected to one side of the sleeve (72) close to the receiving seat (5). Two long grooves are arranged on the hollow column (71). The two right-angle rods (81) are respectively slidably connected through the two long grooves of the hollow column (71). One end of the two right-angle rods (81) far from the sleeve (72) is connected to the inner shaft (82). A liquid chamber (84) is arranged inside the receiving seat (5). Two pistons (85) are slidably connected through the inner wall of the liquid chamber (84). One end of the two pistons (85) far from the liquid chamber (84) is in sliding contact with the neck groove (83). A return spring is arranged on the piston (85). A flow channel (87) is arranged inside one of the convex rods (6). A liquid pipe (86) is connected between the flow channel (87) and the liquid chamber (84).

7. An electrical grounding resistance detection device according to claim 6, characterized in that: A one-way air inlet and a liquid injection port are arranged on the receiving seat (5). A one-way valve is arranged in the flow channel (87). A plurality of through grooves (88) are arranged on the flow channel (87). The through grooves (88) penetrate through the convex rod (6).

8. An electrical grounding resistance detection device according to claim 7, characterized in that: The rotation assembly (9) includes two balls (92). The two balls (92) are both arranged on the outer wall of the inner shaft (82). An internal thread groove (91) is arranged on the inner wall of the probe (4). The two balls (92) are both slidably connected to the internal thread groove (91).

9. An electrical grounding resistance detection device according to claim 8, characterized in that: One side of the receiving seat (5) close to the probe (4) is connected to a fixed seat (93). Four scraping strips (94) are slidably connected to one side of the fixed seat (93) far from the receiving seat (5). Four spring seats (95) are connected to one side of the fixed seat (93) far from the receiving seat (5). Springs are respectively arranged between the four spring seats (95) and the four scraping strips (94). Four triangular grooves (96) are arranged on the outer wall of the probe (4). The four triangular grooves (96) are arranged in a circumferential array. The four scraping strips (94) are respectively attached to the four triangular grooves (96).

Images