Magnetic wiring device for soil resistivity tester

Abstract

A magnetic suction wiring device for a soil resistivity tester comprises a male connector and a female connector, the female connector comprises a first insulating shell, a magnetic conductive metal ring, a second insulating rubber mat, a magnetic suction ring, a first insulating rubber mat and a nut, and the nut is connected with an electrode of the resistivity tester. The magnetic conductive metal ring, the second insulating rubber pad, the magnetic attraction ring, the first insulating rubber pad and the nut are sequentially arranged in the first insulating shell in a sleeving mode from top to bottom. The male joint comprises a silica gel sealing ring, a second insulating shell, a fourth insulating rubber mat, a permanent magnet, a third insulating rubber mat and a spring ejector pin, the silica gel sealing ring, the second insulating shell, the fourth insulating rubber mat, the permanent magnet and the third insulating rubber mat are hollow at the axis, and the spring ejector pin penetrates through the hollow part; the top of the spring ejector pin is hemispherical, the middle part of the magnetic attraction ring is provided with a hemispherical recess, the outer circumferential surface of the first insulating shell is provided with an L-shaped guide groove, and the inner circumferential surface of the second insulating shell is provided with a raised buckle. According to the utility model, through double insurance of magnetic attraction and mechanical locking, butt joint is completed within one second, and the operation intensity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of soil resistivity testing equipment, and in particular to a magnetic connection device for a soil resistivity tester. Background Technology

[0002] Soil resistivity testing is a crucial step in power system grounding design and geological exploration, and its accuracy is closely related to the reliability of the wiring. Traditional testing instruments connect electrodes to conductors via screw tightening, clamping, or welding, which has the following drawbacks:

[0003] 1. Cumbersome operation: Repeated disassembly and reassembly in the field is time-consuming and labor-intensive, especially in multi-electrode testing where efficiency is low; 2. Poor contact: Threaded or clamping connectors are prone to increased contact resistance due to corrosion or loosening, affecting test accuracy; 3. Poor adaptability: Traditional connectors are prone to slipping or contamination in humid or muddy environments, making it difficult to ensure a stable connection.

[0004] While magnetic connection devices exist in existing technologies, most are not optimized for soil resistivity testing scenarios and suffer from problems such as insufficient magnetic force, poor conductivity, or weak waterproof and dustproof capabilities. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the existing technology, such as cumbersome operation and low efficiency of the wiring method of the tester, poor contact and easy loosening, poor adaptability and unstable connection, and to provide a magnetic wiring device for soil resistivity tester.

[0006] The technical solution adopted by this utility model to solve its technical problem is a magnetic connection device for a soil resistivity tester, including a male connector and a female connector. The female connector includes a first insulating shell, a magnetically conductive metal ring, a second insulating rubber pad, a magnetic ring, a first insulating rubber pad, and a nut. The nut can be threadedly connected to the electrode of the resistivity tester. The magnetically conductive metal ring, the second insulating rubber pad, the magnetic ring, the first insulating rubber pad, and the nut are sequentially fitted into the first insulating shell from top to bottom.

[0007] The male connector includes a silicone sealing ring, a second insulating shell, a fourth insulating pad, a permanent magnet, a third insulating pad, and a spring pin. The silicone sealing ring, the second insulating shell, the fourth insulating pad, the permanent magnet, and the third insulating pad are hollow at the center of the shaft, and the spring pin passes through the hollow part.

[0008] The top of the spring pin is hemispherical, the middle of the magnetic ring has a hemispherical groove, the top of the outer circumferential surface of the first insulating shell has an L-shaped guide groove, and the top of the inner circumferential surface of the second insulating shell is provided with a protruding buckle. When the male and female connectors are connected, the top of the spring pin is located in the hemispherical groove of the magnetic ring, the L-shaped guide groove matches the protruding buckle, and mechanical locking is achieved by rotation.

[0009] Furthermore, the first insulating pad is a hollow cylinder, and the second insulating pad and the magnetic metal ring are annular.

[0010] Furthermore, the magnetic ring is circular, and the hemispherical recess at the center of the axis can be embedded in the hollow of the first insulating pad below. The magnetic ring is made of copper alloy and is connected to the nut via a wire.

[0011] Furthermore, the spring pin is cylindrical and made of copper alloy. The spring pin has an annular protrusion near the bottom for fixing the position. The bottom is connected to the electrode rod of the resistivity tester through a wire, and the top is electrically connected to the hemispherical groove of the magnetic ring through the elastic expansion and contraction of the internal spring.

[0012] Furthermore, the third insulating pad is a hollow cylinder, and the annular protrusion of the spring pin is engaged at the bottom of the third insulating pad.

[0013] Furthermore, the four insulating pads and the permanent magnet are annular, and the fourth insulating pad has an annular protrusion in the middle.

[0014] Furthermore, the silicone sealing ring has an annular double-layer structure, with the hollow part at the axis passing through the spring pin and then embedded between the fourth insulating pad and the second insulating shell.

[0015] This utility model has the following beneficial technical effects:

[0016] High-efficiency connection: With dual protection of magnetic attraction and mechanical locking, docking is completed within 1 second, reducing operational intensity; High reliability: Gold-plated contacts and sealed design ensure low contact resistance (<0.1Ω) and IP67 protection rating; Strong adaptability: Adjustable magnetic force (by changing the magnet specification) is suitable for wires of different weights and complex terrains. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a magnetic connection device for a soil resistivity tester according to this utility model;

[0018] Figure 2 This is a cross-sectional view of an embodiment of a magnetic connection device for a soil resistivity tester according to this utility model;

[0019] Figure 3 This is an exploded view of an embodiment of a magnetic connection device for a soil resistivity tester according to this utility model;

[0020] Figure 4 This is an exploded cross-sectional view of an embodiment of a magnetic connection device for a soil resistivity tester according to this utility model;

[0021] Figure 5This is a schematic diagram of the female connector, male connector, and resistivity tester connection of an embodiment of a magnetic connection device for a soil resistivity tester according to this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Female connector; 2. Male connector; 3. Resistivity tester; 101. First insulating shell; 102. Magnetic metal ring; 103. Second insulating pad; 104. Magnetic ring; 105. First insulating pad; 106. Nut; 201. Silicone sealing ring; 202. Second insulating shell; 203. Fourth insulating pad; 204. Permanent magnet; 205. Third insulating pad; 206. Spring pin. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Reference Figure 1 and Figure 5 This embodiment includes a female connector 1, a male connector 2, and a resistivity tester 3. The female connector 1 is threadedly connected to the resistivity tester 3, and the male connector 2 is connected to the electrode rod of the resistivity tester 3 through a wire. At the same time, the male connector 2 and the female connector 1 are electrically connected to each other at their unused ends.

[0026] Reference Figure 2 , Figure 3 and Figure 4 The female connector 1 consists of a first insulating shell 101, a magnetically conductive metal ring 102, a second insulating rubber pad 103, a magnetic suction ring 104, a first insulating rubber pad 105, and a nut 106. The nut 106 is matched with the screws of the resistivity tester 3 electrodes, allowing for detachable installation based on a threaded connection. The magnetically conductive metal ring 102, the second insulating rubber pad 103, the magnetic suction ring 104, the first insulating rubber pad 105, and the nut 106 are all located inside the first insulating shell 101 and are connected sequentially from top to bottom.

[0027] Reference Figure 2 , Figure 3 and Figure 4 The first insulating pad 105 is a hollow cylinder; the magnetic ring 104 is circular with a hemispherical recess at its center, which can be inserted into the hollow part of the first insulating pad 105 below. The magnetic ring 104 is made of copper alloy and is connected to the nut 106 by a wire; the second insulating pad 103 is annular and is used to insulate the internal structure of the female connector 1 from the external environment. The second insulating pad 103 has an annular protrusion in the middle; the magnetic metal ring 102 is annular and its hollow center can be inserted into the protrusion in the middle of the second insulating pad 103; the top of the outer peripheral surface of the first insulating shell 101 is provided with an L-shaped guide groove, and two symmetrical grooves are provided.

[0028] Reference Figure 2 , Figure 3 and Figure 4 The male connector 2 is composed of a silicone sealing ring 201, a second insulating shell 202, a fourth insulating pad 203, a permanent magnet 204, a third insulating pad 205, and a spring pin 206. The silicone sealing ring 201, the second insulating shell 202, the fourth insulating pad 203, the permanent magnet 204, and the third insulating pad 205 are all hollow at the shaft center. The fourth insulating pad 203, the permanent magnet 204, and the third insulating pad 205 are sequentially connected to the interior of the second insulating shell 202 from top to bottom. Furthermore, the top of the second insulating shell 202 has a groove, within which the silicone sealing ring 201 is located. The inner diameter of this groove is the same as the outer diameter of the female connector 1, thus enabling the connection between the female connector 1 and the male connector 2.

[0029] Reference Figure 2 , Figure 3 and Figure 4 The spring-loaded pin 206 is cylindrical and made of copper alloy. It has a ring-shaped protrusion in the lower middle section to fix its position. The bottom is connected to the electrode rod of the resistivity tester 3 via a wire. The upper surface of the pin is gold-plated to reduce contact resistance. The pin can be elastically extended and retracted by an internal spring. The end of the pin is hemispherical and matches the hemispherical recess of the magnetic ring 104. The third insulating pad 205 is a hollow cylinder. The spring-loaded pin 206 passes through the hollow center of the third insulating pad 205, and the ring-shaped protrusion of the spring-loaded pin 206 is engaged with the bottom of the third insulating pad 205. The permanent magnet 204 is annular and can be a neodymium iron boron magnet. The spring-loaded pin 206 passes through the hollow center of the permanent magnet 204. The fourth insulating pad 203 is annular and is used to insulate the internal structure of the male connector 2 from the external environment. The fourth insulating pad 203 has an annular protrusion in the middle, and the spring pin 206 passes through the hollow part in the middle of the fourth insulating pad 203. The inner wall of the groove of the second insulating shell 202 is provided with a protruding buckle, which matches the L-shaped guide groove on the outer circumference of the first insulating shell 101 of the female connector 1. It can be mechanically locked by rotation. The spring pin 206 passes through the hollow part in the middle of the second insulating shell 202. The silicone sealing ring 201 is an annular double-layer structure. The hollow part in the middle passes through the spring pin 206 and is embedded between the fourth insulating pad 203 and the second insulating shell 202.

[0030] The permanent magnet 204 and the magnetic metal ring 102 enable magnetic attraction between the male connector 2 and the female connector 1, while the protruding buckle and the L-shaped guide groove achieve mechanical locking.

[0031] Taking the four-electrode method for soil resistivity testing as an example:

[0032] 1. The female connector 1 is pre-installed on the wiring terminal 3 of the resistivity tester;

[0033] 2. Insert four grounding electrode rods into the soil. The top of the electrode rods is pre-connected to the male connector 2 via a wire. They are then magnetically attracted to the corresponding female connector 1 and locked by rotating the buckle.

[0034] 3. Start the tester. The current is transmitted to the nut 106 through the terminal, then to the magnetic groove through the internal wire, then to the spring pin 206 through the magnetic contact, and then to the electrode rod through the wire to complete the data acquisition.

[0035] 4. During the test, the silicone sealing ring 201 is magnetically squeezed to achieve a waterproof effect and isolate interference from the external environment.

[0036] 5. After the test, rotate the buckle in the opposite direction to easily separate the connector, clean it, and store it away.

[0037] In this embodiment, the male connector 2 magnet is made of N52 grade neodymium iron boron, with a single-point magnetic attraction force ≥5kg and a suitable cross-sectional area of ​​6mm². 2 Wires; when the distance between the magnetic ring of female connector 1 and the magnet of male connector 2 is ≤2mm, the contact resistance fluctuation range is <5%; the sealing ring has a temperature range of -40℃ to 120℃, adapting to extreme environments.

[0038] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A magnetic connection device for a soil resistivity tester, characterized in that, It includes a male connector (2) and a female connector (1). The female connector (1) includes a first insulating shell (101), a magnetic metal ring (102), a second insulating pad (103), a magnetic ring (104), a first insulating pad (105), and a nut (106). The nut (106) is threadedly connected to the electrode of the resistivity tester (3). The magnetic metal ring (102), the second insulating pad (103), the magnetic ring (104), the first insulating pad (105), and the nut (106) are sequentially fitted into the first insulating shell (101) from top to bottom. The male connector (2) includes a silicone sealing ring (201), a second insulating shell (202), a fourth insulating pad (203), a permanent magnet (204), a third insulating pad (205), and a spring pin (206). The silicone sealing ring, the second insulating shell (202), the fourth insulating pad (203), the permanent magnet (204), and the third insulating pad (205) are hollow at the axis, and the spring pin (206) passes through the hollow part. The top of the spring pin (206) is hemispherical, the magnetic ring (104) has a hemispherical recess in the middle, the top of the outer circumferential surface of the first insulating shell (101) has an L-shaped guide groove, and the top of the inner circumferential surface of the second insulating shell (202) is provided with a protruding buckle. When the male connector (2) and the female connector (1) are connected, the top of the spring pin (206) is located in the hemispherical recess of the magnetic ring (104), the L-shaped guide groove matches the protruding buckle, and mechanical locking is achieved by rotation.

2. The magnetic connection device for a soil resistivity tester according to claim 1, characterized in that, The first insulating pad (105) is a hollow cylinder, and the second insulating pad (103) and the magnetic metal ring (102) are annular.

3. The magnetic connection device for a soil resistivity tester according to claim 1, characterized in that, The magnetic ring (104) is circular, and the hemispherical recess at the center of the axis can be embedded in the hollow of the first insulating pad (105) below. The magnetic ring (104) is made of copper alloy and is connected to the nut (106) by a wire.

4. The magnetic connection device for a soil resistivity tester according to claim 1, characterized in that, The spring pin (206) is cylindrical and made of copper alloy. The spring pin (206) has an annular protrusion for fixing the position on the side near the bottom. The bottom is connected to the electrode rod of the resistivity tester (3) through a wire. The top is electrically connected to the hemispherical groove of the magnetic ring (104) through the elastic extension and contraction of the internal spring.

5. A magnetic connection device for a soil resistivity tester according to claim 4, characterized in that, The third insulating pad (205) is a hollow cylinder, and the annular protrusion of the spring pin (206) is stuck at the bottom of the third insulating pad (205).

6. The magnetic connection device for a soil resistivity tester according to claim 1, characterized in that, The fourth insulating pad (203) and the permanent magnet (204) are annular, and the fourth insulating pad (203) has an annular protrusion in the middle.

7. The magnetic connection device for a soil resistivity tester according to claim 1, characterized in that, The silicone sealing ring (201) has a ring-shaped double-layer structure. The hollow part at the center passes through the spring pin (206) and is embedded between the fourth insulating pad (203) and the second insulating shell (202).

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