Grounding rod for grounding resistance tester

Abstract

The utility model provides a grounding rod for a grounding resistance tester, which comprises a grounding rod body, a spiral column, a tip, a positioning sleeve, a handle and a wiring terminal, the spiral column is integrally formed at the lower end of the grounding rod body, and the tip is integrally formed at the lower end of the spiral column; the spiral column movably penetrates through a positioning sleeve; a handle is integrally formed on the outer side face of the upper end of the grounding rod body, and a wiring terminal is fixed to the upper end of the grounding rod body. Soft cloth is fixed on the outer side surface of the upper end of the grounding rod body, and scale marks are printed on the outer side surface of the soft cloth; and a length measuring line is printed on the outer side surface of the positioning sleeve. The arrangement of the positioning sleeve can ensure that the spiral column is vertically inserted into the ground, the arrangement of the wiring terminal facilitates the fixation of the measuring line of the grounding resistance tester, and in addition, the arrangement of the soft cloth and the measuring line facilitates the judgment of the length of the spiral column inserted into the ground by a worker.

Description

Technical Field

[0001] This utility model belongs to the technical field of grounding resistance testers, and in particular relates to a grounding rod for a grounding resistance tester. Background Technology

[0002] A grounding resistance tester is an instrument used to measure grounding resistance. It is an important instrument in power systems, communication equipment, and lightning protection projects for measuring the resistance value of grounding devices. Accurate measurement of grounding resistance depends on a reliable grounding connection, and the grounding rod is the key connection component between the tester and the earth.

[0003] Existing grounding resistance testers typically use a grounding rod consisting of a grounding rod body, terminals, a guide bracket, and a spiral rod. The grounding terminals allow the grounding resistance tester to electrically connect the measuring wire to the grounding rod body. The grounding rod body is fixed together with the spiral rod, and the guide bracket guides the spiral rod, which is inserted into the ground.

[0004] However, existing grounding resistance testers using grounding rods have the following drawbacks in practical use:

[0005] First, the guide bracket of the existing grounding rod in the grounding resistance tester cannot be folded when not in use, thus affecting portability. Second, the terminals in the existing grounding rod can only fix the conductive wire of the measuring line, not the insulating sleeve of the measuring line, which makes it easy for the measuring line to separate from the terminal when there is external force. In addition, the existing grounding rod makes it inconvenient for operators to judge the length of the spiral column inserted into the ground.

[0006] Therefore, it is essential to invent a grounding rod for a grounding resistance tester. Utility Model Content

[0007] To address the above problems, this utility model proposes a grounding rod for a grounding resistance tester. The technical solution used is as follows:

[0008] A grounding rod for a grounding resistance tester includes a grounding rod body, a spiral post, a pointed tip, a positioning sleeve, a handle, and a terminal block. The spiral post is integrally formed at the lower end of the grounding rod body, and the pointed tip is integrally formed at the lower end of the spiral post. The positioning sleeve movably passes through the spiral post. A handle is integrally formed on the outer side of the upper end of the grounding rod body, and a terminal block is fixed at the upper end of the grounding rod body. The terminal block is electrically connected to the measuring line of the grounding resistance tester.

[0009] Furthermore, the positioning sleeve includes a cylinder, a first external thread, a second external thread, an adjusting plate, a turntable, rockers, and a positioning plate. A helical column moves through the interior of the cylinder, and the first and second external threads are fixed to the outer side of the cylinder, with the second external thread positioned above the first external thread. The adjusting plate is fixed to the outer side of the cylinder via the first or second external thread, and a turntable is rotatably mounted on the lower side of the adjusting plate via a support bearing. Several rockers are rotatably mounted on the lower side of the turntable, with the other end of each rocker rotatably connected to a corresponding positioning plate. The end of the positioning plate furthest from the rocker is rotatably connected to the cylinder via a hinge. This configuration guides the helical column during use, ensuring it is vertically inserted into the ground. When not in use, it can be folded for easy carrying.

[0010] Furthermore, the terminal block includes a housing, a pressing plate, a screw, and a wire groove. The housing is fixed to the upper end of the grounding rod body, and the pressing plate is slidably installed inside the housing. A screw is provided on one side of the pressing plate, and the screw passes through the housing through thread engagement. A wire groove is provided on the side of the pressing plate away from the screw. This arrangement not only fixes the conductive wire of the measuring line of the grounding resistance tester, but also fixes the insulation encapsulation of the measuring line of the grounding resistance tester, thereby preventing the measuring line of the grounding resistance tester from separating from the terminal block.

[0011] Furthermore, a soft cloth is fixed to the upper outer side of the grounding rod body, and scale lines are printed on the outer side of the soft cloth; a length measuring line is printed on the upper outer side of the positioning sleeve. This setting makes it easier for workers to judge the length of the spiral column penetrating into the ground.

[0012] Furthermore, a rubber sleeve is fixed to the outer side of the handle, which provides insulation for the handle.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The positioning sleeve of this utility model can be unfolded during use to guide the spiral column and ensure that the spiral column is inserted vertically into the ground. When not in use, it can be folded for easy carrying.

[0015] 2. The terminal block design of this utility model not only fixes the conductive wire of the measuring line of the grounding resistance tester, but also fixes the insulation encapsulation of the measuring line of the grounding resistance tester, thereby preventing the measuring line of the grounding resistance tester from separating from the terminal block.

[0016] 3. The soft cloth and measuring line of this utility model can be set vertically to the ground during use, and the length of the spiral column can be judged by observing the position of the measuring line on the soft cloth. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the positioning sleeve of this utility model when folded.

[0019] Figure 2 This is a schematic diagram of the structure of the positioning sleeve of this utility model when it is unfolded.

[0020] Figure 3 This is a structural schematic diagram of the positioning sleeve of this utility model.

[0021] Figure 4 This is a structural schematic diagram of the cylindrical body, the first external thread, and the second external thread of this utility model.

[0022] Figure 5 This is a schematic diagram of the structure of the wiring terminal of this utility model.

[0023] Figure 6 This is a schematic diagram of the extrusion plate of this utility model.

[0024] In the picture:

[0025] 1-Grounding rod body, 2-Helical column, 3-Pointed tip, 4-Positioning sleeve, 41-Cylinder body, 42-First external thread, 43-Second external thread, 44-Adjusting plate, 45-Turntable, 46-Rock arm, 47-Positioning plate, 5-Handle, 6-Terminal, 61-Outer shell, 62-Extrusion plate, 63-Screw, 64-Wire groove, 7-Soft cloth, 8-Length measuring wire. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Please see Figures 1 to 6 As shown, this utility model is a grounding rod for a grounding resistance tester, including a grounding rod body 1, a spiral post 2, a pointed tip 3, a positioning sleeve 4, a handle 5, and a terminal block 6. The spiral post 2 is integrally formed at the lower end of the grounding rod body 1, and the pointed tip 3 is integrally formed at the lower end of the spiral post 2. The positioning sleeve 4 is movably passed through the spiral post 2. The handle 5 is integrally formed on the outer side of the upper end of the grounding rod body 1, and the terminal block 6 is fixed at the upper end of the grounding rod body 1. The terminal block 6 is connected to the measuring line of the grounding resistance tester. The grounding rod body 1 is made of copper-clad steel, the spiral post 2 is made of 304 stainless steel, and the pointed tip 3 is made of hard alloy (tungsten-cobalt alloy).

[0029] Specifically, the positioning sleeve 4 includes a cylinder 41, a first external thread 42, a second external thread 43, an adjusting plate 44, a turntable 45, rocker arms 46, and a positioning plate 47. A helical column 2 movably passes through the interior of the cylinder 41, and the first external thread 42 and the second external thread 43 are fixed to the outer surface of the cylinder 41, with the second external thread 43 positioned above the first external thread 42. The adjusting plate 44 is fixed to the outer surface of the cylinder 41 via the first external thread 42 or the second external thread 43, and the turntable 45 is rotatably mounted on the lower surface of the adjusting plate 44 via a support bearing. Several rocker arms 46 are rotatably mounted on the lower surface of the turntable 45, and the other end of each rocker arm 46 is rotatably connected to a corresponding positioning plate 47. The end of the positioning plate 47 furthest from the rocker arm 46 is rotatably connected to the cylinder 41 via a hinge. This arrangement allows the cylinder 41 to guide the spiral column 2. When not in use, the adjusting plate 44 can be fixed to the cylinder 41 via the second external thread 43, so that the rocker arm 46 and the positioning plate 47 are close to the cylinder 41, thereby reducing the volume of the positioning sleeve 4 and making it easier to carry. When in use, the adjusting plate 44 can be fixed to the cylinder 41 via the first external thread 42, so that the positioning plate 47 is parallel to the lower side of the cylinder 41. Through the cooperation of the positioning plate 47 and the cylinder 41, the spiral column 2 is guided, allowing the spiral column 2 to be inserted vertically into the ground.

[0030] Specifically, the terminal block 6 includes a housing 61, a pressing plate 62, a screw 63, and a wire pressing groove 64. The housing 61 is fixed to the upper end of the grounding rod body 1, and the pressing plate 62 is slidably installed inside the housing 61. A screw 63 is provided on one side of the pressing plate 62, and the screw 63 passes through the housing 61 through thread engagement. A wire pressing groove 64 is provided on the side of the pressing plate 62 away from the screw 63. In use, the measuring wire of the grounding resistance tester can be placed between the pressing plate 62 and the housing 61. Then, by rotating the screw 63, the pressing plate 62 presses and fixes the conductive wire of the measuring wire. The wire pressing groove 64 can press and fix the insulation encapsulation of the measuring wire.

[0031] Specifically, a soft cloth 7 is fixed to the upper outer side of the grounding rod body 1, and scale lines are printed on the outer side of the soft cloth 7; a measuring line 8 is printed on the upper outer side of the cylinder 41 of the positioning sleeve 4. When in use, the soft cloth 7 can be set vertically to the ground. At this time, the staff can judge the length of the spiral column 2 into the ground by observing the position of the measuring line 8 on the scale line.

[0032] Specifically, a rubber sleeve is fixed to the outer side of the handle 5, which can insulate the handle.

[0033] Please see Figure 1-6 As shown, this utility model is a grounding rod for a grounding resistance tester. Its working principle is as follows: When in use, first unfold the positioning sleeve and bring the lower end of the positioning sleeve into contact with the ground. Then, rotate the grounding rod body and the spiral post by the handle, so that the spiral post is inserted into the ground. By using a soft cloth and a measuring line, the length of the spiral post inserted into the ground is judged. After the spiral post is inserted into the ground, connect the terminal block to the measuring line of the grounding resistance tester. Then, through the cooperation of the terminal block, the grounding rod body and the spiral post, the current generated by the grounding resistance tester is conducted.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A grounding rod for a grounding resistance tester, comprising a grounding rod body (1), a spiral post (2), a pointed tip (3), a positioning sleeve (4), a handle (5), and a wiring terminal (6), characterized in that: The lower end of the grounding rod body (1) is integrally formed with a spiral column (2), wherein the lower end of the spiral column (2) is integrally formed with a pointed tip (3); the spiral column (2) moves through a positioning sleeve (4); the upper outer side of the grounding rod body (1) is integrally formed with a handle (5), and the upper end of the grounding rod body (1) is fixed with a wiring terminal (6), which is connected to the measuring line of the grounding resistance tester.

2. The grounding rod for a grounding resistance tester as described in claim 1, characterized in that: The positioning sleeve (4) includes a cylinder (41), a first external thread (42), a second external thread (43), an adjusting plate (44), a turntable (45), a rocker arm (46), and a positioning plate (47). The cylinder (41) has a spiral column (2) that moves through its interior, and the outer side of the cylinder (41) is fixed with the first external thread (42) and the second external thread (43), respectively. The second external thread (43) is located on the upper side of the first external thread (42). The adjusting plate (44) is fixed to the outer side of the cylinder (41) through the first external thread (42) or the second external thread (43), and the lower side of the adjusting plate (44) is rotatably mounted with a turntable (45). The lower side of the turntable (45) is rotatably mounted with several rockers (46). The other end of each rocker arm (46) is rotatably connected to the corresponding positioning plate (47), and the end of the positioning plate (47) away from the rocker arm (46) is rotatably connected to the cylinder (41).

3. The grounding rod for a grounding resistance tester as described in claim 1, characterized in that: The terminal block (6) includes a housing (61), a pressing plate (62), a screw (63), and a wire groove (64). The housing (61) is fixed to the upper end of the grounding rod body (1), and the pressing plate (62) is slidably installed inside the housing (61). A screw (63) is provided on one side of the pressing plate (62), wherein the screw (63) passes through the housing (61) through thread engagement. A wire groove (64) is provided on the side of the pressing plate (62) away from the screw (63).

4. A grounding rod for a grounding resistance tester as described in claim 2, characterized in that: The outer side of the upper end of the grounding rod body (1) is fixed with a soft cloth (7), and the outer side of the soft cloth (7) is printed with scale lines; the outer side of the upper end of the positioning sleeve (41) is printed with a length measuring line (8).

5. A grounding rod for a grounding resistance tester as described in claim 1, characterized in that: A rubber sleeve is fixed to the outer side of the handle (5).

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