Ground test rod and ground impedance tester

Abstract

The present invention relates to the field of ground impedance measurement, and in particular, to a grounding test rod and a grounding impedance tester. The grounding test rod comprises a rigid rod and a plurality of conductive parts, all of which are mounted on the rigid rod. The plurality of conductive parts are spaced apart along the length direction of the rigid rod and insulated from each other, and the plurality of conductive parts can be electrically connected to the tester body through a plurality of wires. The grounding impedance tester comprises the above-mentioned grounding test rod. The grounding test rod and the grounding impedance tester provided by the present invention can test the impedance at different depths, and then, can compare the impedances measured at different depths to determine the optimal depth of the grounding body buried underground. The optimal depth can be selected as the depth at which the conductive part corresponding to the minimum impedance measured is located during the test.

Description

Technical Field

[0001] The present invention relates to the field of ground impedance measurement, and in particular to a ground test rod and a ground impedance tester. Background Art

[0002] A ground impedance tester is a device used to test ground impedance. It mainly consists of a test rod and a tester body. The test rod is driven into the ground and connected to the tester body with a wire. The tester body provides current to the test rod to obtain ground impedance.

[0003] When the grounding body is buried at different depths, the impedance presented is different. However, the test rod of the existing grounding impedance tester is an iron rod, which cannot test the impedance at different depths.

[0004] In summary, how to overcome the above-mentioned defects of the test rod of the existing ground impedance tester is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] The object of the present invention is to provide a grounding test rod and a grounding impedance tester to alleviate the technical problem that the test rod of the grounding impedance tester in the prior art cannot test the impedance at different depths.

[0006] The grounding test rod provided by the present invention includes a rigid rod and multiple conductive parts. The multiple conductive parts are all installed on the rigid rod. The multiple conductive parts are arranged at intervals along the length direction of the rigid rod and are insulated from each other. The multiple conductive parts can be electrically connected to the tester body through multiple wires respectively.

[0007] Preferably, as an implementable embodiment, the grounding test rod further includes an insulating bracket, and the plurality of conductive members are all mounted on the rigid rod through the insulating bracket.

[0008] Preferably, as an implementation method, the insulating bracket is a cylindrical structure, and the insulating bracket is sleeved on the rigid rod, the rigid rod has a boss at the part close to the ground end, and the boss is used to block the insulating bracket, and the conductive part is sleeved on the periphery of the insulating bracket.

[0009] Preferably, as an implementable embodiment, the insulating bracket includes a first cylindrical portion and a second cylindrical portion, and the first cylindrical portion and the second cylindrical portion are alternately arranged along the length direction of the rigid rod.

[0010] The conductive member is a cylindrical structure, and is sleeved outside the first cylindrical portion, and an end surface of the conductive member abuts against an end surface of the second cylindrical portion.

[0011] Preferably, as an implementable embodiment, the rigid rod includes a tube body, the underground end of the tube body is connected to a guide head, the guide head is sealed at the end of the tube body, and the tube body and the first cylindrical portion are both provided with a channel for the wire to pass through.

[0012] Preferably, as an implementation method, the guide head is conical, the top of the guide head is the ground-entering end, and the bottom of the guide head forms the boss;

[0013] and / or, two adjacent insulating brackets are bonded together, and the insulating bracket closest to the guide head is bonded to the guide head;

[0014] And / or, there is an insulating filler in the gap between the tube body and the wire.

[0015] Preferably, as an implementable embodiment, a first slot is provided on the tube body that passes through both ends of the tube body, and a rib is provided on the inner side of the first cylindrical portion. The first slot cooperates with the rib to limit the circumferential rotation of the first cylindrical portion.

[0016] Preferably, as an implementable embodiment, a second slot is formed on the convex rib, and the second slot passes through an end of the convex rib away from the second cylindrical portion.

[0017] Preferably, as an implementation method, the rigid rod is made of metal, and / or the conductive member is made of metal, and / or the insulating bracket is made of ceramic.

[0018] Correspondingly, the present invention also provides a ground resistance tester, comprising the above-mentioned ground test rod.

[0019] The beneficial effects of the ground test rod and ground impedance tester provided by the present invention are:

[0020] The grounding test rod provided by the present invention is mainly composed of a rigid rod and several conductive parts. Multiple conductive parts are installed on the rigid rod, and the multiple conductive parts are arranged at intervals along the length direction of the rigid rod. Therefore, when the test rod is driven into the ground, each conductive part will be at a different depth; the multiple conductive parts are insulated from each other, and the multiple conductive parts can be electrically connected to the tester body through multiple wires respectively. Therefore, the tester body can choose to provide current to different conductive parts, and then, the impedance of the depth at which the corresponding conductive parts are located can be obtained.

[0021] Therefore, the grounding test rod provided by the present invention can conduct the current provided by the tester body to the conductive parts at different depths to obtain impedances at different depths. Then, the impedances measured at different depths can be compared to determine the optimal depth of the grounding body buried underground. The optimal depth can be selected as the depth of the conductive part corresponding to the measured minimum impedance during the test.

[0022] The ground resistance tester provided by the present invention includes the above-mentioned ground resistance test rod.

[0023] Therefore, the ground resistance tester provided by the present invention can test the impedance at different depths, and then compare the measured impedance at different depths to determine the optimal depth of the grounding body buried underground. The optimal depth can be selected as the depth of the conductive part corresponding to the measured minimum impedance during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic front view of the structure of a ground test rod provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the assembly structure of a grounding test rod provided in an embodiment of the present invention, wherein only the assembly structure of a conductive member, an insulating bracket, and a rigid rod is illustrated;

[0027] Figure 3 A schematic diagram of the three-dimensional structure of the insulating bracket in the grounding test rod provided by an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the assembly structure of the insulating bracket and the conductive member in the grounding test rod provided by an embodiment of the present invention;

[0029] Figure 5 A schematic front view of the rigid rod in the grounding test rod provided by an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the three-dimensional structure of the rigid rod in the grounding test rod provided by an embodiment of the present invention.

[0031] icon:

[0032] 100 - Rigid rod; 110 - Tube body; 111 - First slot; 120 - Guide head;

[0033] 200-conductive parts;

[0034] 300 - insulating bracket; 310 - first cylindrical portion; 311 - convex rib; 312 - second slot; 320 - second cylindrical portion. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "inner" and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0039] See also Figure 1 - Figure 6 This embodiment provides a grounding test rod, which is mainly composed of a rigid rod 100 and a plurality of conductive members 200. The multiple conductive members 200 are all mounted on the rigid rod 100, and the multiple conductive members 200 are arranged at intervals along the length direction of the rigid rod 100. Therefore, when the test rod is driven into the ground, the various conductive members 200 will be at different depths. The multiple conductive members 200 are insulated from each other, and the multiple conductive members 200 can be electrically connected to a tester body through multiple wires. Therefore, the tester body can selectively provide current to different conductive members 200, and further, the impedance at the depth of the corresponding conductive member 200 can be obtained.

[0040] Therefore, the grounding test rod provided in this embodiment can conduct the current provided by the tester body to the conductive part 200 at different depths to obtain impedances at different depths. Then, the impedances measured at different depths can be compared to determine the optimal depth of the grounding body buried underground. The optimal depth can be selected as the depth of the conductive part 200 corresponding to the measured minimum impedance during the test.

[0041] See also Figure 2 - Figure 4 In the grounding test rod provided in this embodiment, an insulating bracket 300 can be provided, and multiple conductive members 200 are mounted on the rigid rod 100 through the insulating bracket 300. In this way, the insulating bracket 300 can be used to achieve mutual insulation between the multiple conductive members 200. In this way, there is no need to consider whether the material selected for the rigid rod 100 is insulating, which can expand the range of materials used to manufacture the rigid rod 100.

[0042] Preferably, the rigid rod 100 may be made of metal to ensure the strength of the rigid rod 100 and prevent the rigid rod 100 from breaking during the process of being driven into the ground.

[0043] See also Figure 2 - Figure 4 , the insulating bracket 300 can be set as a cylindrical structure, so that the insulating bracket 300 can be sleeved on the rigid rod 100, that is, the rigid rod 100 can pass through the tube of the insulating bracket 300; at the same time, a boss can be set on the part of the rigid rod 100 close to the ground end, and the conductive member 200 can be sleeved on the outer periphery of the insulating bracket 300, so that the conductive member 200 and the rigid rod 100 can be separated by the insulating bracket 300, thereby achieving insulation between the conductive member 200 and the rigid rod 100, and the boss on the rigid rod 100 can block the insulating bracket 300, so that the insulating bracket 300 will not fall out of the ground end of the rigid rod 100, thereby ensuring the assembly effect of the insulating bracket 300 and the rigid rod 100.

[0044] See also Figure 1 and Figure 3 The above-mentioned insulating bracket 300 has a first cylindrical portion 310 and a second cylindrical portion 320, and the first cylindrical portion 310 and the second cylindrical portion 320 are alternately arranged along the length direction of the rigid rod 100, that is, multiple insulating brackets 300 are sequentially put on the rigid rod 100 in the same posture.

[0045] See also Figure 4The above-mentioned conductive member 200 is also set to a cylindrical structure, and the conductive member 200 is placed outside the first cylindrical portion 310, and the end face of the conductive member can abut against the end face of the second cylindrical portion 320. That is to say, the second cylindrical portion 320 can block the conductive member 200. When multiple insulating brackets 300 and conductive members 200 are installed on the rigid rod 100, the second cylindrical portions 320 of two adjacent insulating brackets 300 can clamp the conductive member 200 from both ends of the conductive member 200. Therefore, the second cylindrical portion 320 can limit the conductive member 200 and the conductive member 200 will not deviate.

[0046] During actual assembly, the second cylindrical portion 320 of the insulating bracket 300 will be put onto the rigid rod 100 before the first cylindrical portion 310. In this way, the conductive part 200 mounted outside the first cylindrical portion 310 will not contact the boss on the rigid rod 100. Therefore, when the rigid rod 100 is made of conductive material, the conductive part 200 at the lowest end will not be affected by the rigid rod 100, thereby ensuring the accuracy of the measurement results of the conductive part 200 at the lowest end.

[0047] See also Figure 1 、 Figure 2 、 Figure 5 and Figure 6 The specific structure of the rigid rod 100 includes a tube body 110, and a guide head 120 is connected to the underground end of the tube body 110, so that the guide head 120 can be used to seal the end of the tube body 110. Therefore, when the rigid rod 100 is driven into the ground, soil will not enter the tube body 110 from the underground end of the tube body 110.

[0048] Channels for the wire to pass through are provided on both the tube body 110 and the first cylindrical portion 310. During assembly, the wire led out from the tester body can be passed into the tube body 110 from the end of the tube body 110 away from the ground end, and pass through the channels on the tube body 110 and the first cylindrical portion 310 to connect with the corresponding conductive member 200. On the one hand, the tube body 110 can wrap the wire so that it will not come into contact with the soil, and the wire will not be separated from the conductive member 200 or the wire itself will not be disconnected due to excessive pulling force when the grounding test rod is driven into the ground, thereby improving reliability. On the other hand, the tube body 110 and the first cylindrical portion 310 do not need to be connected to the wire, which facilitates assembly.

[0049] Preferably, see Figure 1 and Figure 5 The shape of the guide head 120 can be set to be conical, with the top of the cone of the guide head 120 as the ground-entering end, and the bottom of the cone of the guide head 120 as a boss. In the process of driving the rigid rod 100 into the ground, the top of the cone of the guide head 120 will be driven into the ground first and can guide the pipe body 110 into the ground, which is more labor-saving.

[0050] The guide head 120 can be fixed to the tube body 110 by welding.

[0051] Two adjacent insulating brackets 300 can be connected to each other by bonding, and the insulating bracket 300 closest to the guide head 120 can be bonded to the guide head 120. In this way, the position between the insulating bracket 300 and the rigid rod 100 is fixed, forming an integral structure. During the process of driving the grounding test rod into the ground, the insulating bracket 300 will not be offset relative to the rigid rod 100.

[0052] An insulating filler may be provided in the gap between the tube body 110 and the wire, so that the position of the wire can be fixed and the structure is more reliable.

[0053] Specifically, a curable insulating liquid can be used as the insulating filler. During filling, the insulating liquid can be poured into the tube body 110 and then waited for the insulating liquid to solidify by itself, which is very convenient.

[0054] See also Figure 2 、 Figure 5 and Figure 6 A first slot 111 passing through both ends of the tube body 110 can be opened on the tube body 110, and a rib 311 can be provided on the inner side of the first cylindrical portion 310. In this way, the first slot 111 on the tube body 110 cooperates with the rib 311 on the first cylindrical portion 310 to limit the circumferential rotation of the first cylindrical portion 310.

[0055] During assembly, the rib 311 of the insulating bracket 300 is aligned with the first groove 111 on the tube body 110, and multiple insulating brackets 300 are sequentially put onto the tube body 110 from the end of the tube body 110 away from the ground end. During this process, the first groove 111 on the tube body 110 can guide the rib 311 on the first cylindrical portion 310.

[0056] Further, see Figure 2 - Figure 4 A second slot 312 can be opened on the rib 311, and the second slot 312 passes through the end of the rib 311 away from the second cylindrical portion 320. In this way, the wire can be connected to the conductive member 200 in advance, and then the wire can be aligned with the second slot 312. Then, the conductive member 200 can be put on the first cylindrical portion 310, which makes assembly more convenient.

[0057] In particular, the conductive member 200 may be made of metal.

[0058] The insulating bracket 300 may be made of ceramic.

[0059] This embodiment also provides a ground impedance tester, which includes the above-mentioned ground test rod.

[0060] Therefore, the ground resistance tester provided in this embodiment can test the impedance at different depths, and then compare the measured impedance at different depths to determine the optimal depth of the grounding body buried underground. The optimal depth can be selected as the depth of the conductive part 200 corresponding to the measured minimum impedance during the test.

[0061] It should be noted that the above-mentioned tester body can provide a current with a frequency of 1 MHz to the ground test rod to simulate the lightning current, so as to obtain the impedance at different depths under the action of the lightning current.

[0062] In summary, the present invention discloses a ground test rod and ground impedance tester that overcome many technical drawbacks of conventional ground impedance tester test rods. The ground test rod and ground impedance tester provided in this embodiment can direct current provided by the tester body to a conductive member 200 at different depths to obtain impedances at different depths. Furthermore, the impedances measured at different depths can be compared to determine the optimal depth of the grounding element buried underground. This optimal depth can be selected as the depth of the conductive member 200 at the time of testing that corresponds to the minimum impedance measured.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ground test rod, characterized in that: The device comprises a rigid rod (100) and a plurality of conductive members (200), wherein the plurality of conductive members (200) are mounted on the rigid rod (100), the plurality of conductive members (200) are spaced apart and insulated from each other along the length direction of the rigid rod (100), and the plurality of conductive members (200) can be electrically connected to a tester body via a plurality of wires; The grounding test rod further comprises an insulating bracket (300), and the plurality of conductive members (200) are all mounted on the rigid rod (100) via the insulating bracket (300); The insulating support (300) is a cylindrical structure, and the insulating support (300) is sleeved on the rigid rod (100). The rigid rod (100) has a boss at a portion close to the ground end, and the boss is used to block the insulating support (300). The conductive member (200) is sleeved on the periphery of the insulating support (300). The rigid rod (100) is made of metal, and / or the conductive member (200) is made of metal, and / or the insulating bracket (300) is made of ceramic; The insulating bracket (300) comprises a first cylindrical portion (310) and a second cylindrical portion (320), and the first cylindrical portion (310) and the second cylindrical portion (320) are alternately arranged along the length direction of the rigid rod (100); The conductive member (200) is a cylindrical structure, the conductive member (200) is sleeved outside the first cylindrical portion (310), and the end surface of the conductive member (200) abuts against the end surface of the second cylindrical portion (320); The rigid rod (100) comprises a tube body (110), the underground end of the tube body (110) is connected to a guide head (120), the guide head (120) is sealed at the end of the tube body (110), and a channel for the wire to pass through is provided on both the tube body (110) and the first cylindrical portion (310).

2. The ground test rod according to claim 1, characterized in that: The guide head (120) is conical, the top of the guide head (120) is the ground-entering end, and the bottom of the guide head (120) forms the boss; and / or, two adjacent insulating supports (300) are bonded together, and the insulating support (300) closest to the guide head (120) is bonded to the guide head (120); And / or, an insulating filler is provided in the gap between the tube body (110) and the wire.

3. The ground test rod according to claim 1, characterized in that: The tube body (110) is provided with a first slot (111) passing through both ends of the tube body (110); the inner side of the first cylindrical portion (310) has a convex rib (311); the first slot (111) cooperates with the convex rib (311) to limit the circumferential rotation of the first cylindrical portion (310).

4. The ground test rod according to claim 3, characterized in that: A second slot (312) is provided on the convex rib (311), and the second slot (312) passes through an end of the convex rib (311) that faces away from the second cylindrical portion (320).

5. A ground impedance tester, characterized in that: The invention comprises the grounding test rod according to any one of claims 1 to 4.

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