Protective grounding device for high-voltage electrical test

Abstract

The utility model provides a protective grounding device for a high-voltage electrical test, which comprises a grounding rod, a conductive block is mounted at the upper end of the grounding rod, detachable conductive columns are mounted at two ends of the conductive block, one end of each conductive column is fixedly connected with a threaded head, and the other end of each conductive column is fixedly connected with a threaded rod. First threaded blind holes matched with the threaded heads are formed in the faces, away from the threaded heads, of the conductive columns, the threaded heads on one conductive column are in threaded connection with the interiors of the first threaded blind holes in the other conductive column, and connecting lugs used for being connected with ground wires are fixedly connected to the outer surfaces of the conductive columns. One side face of the connecting lug is provided with an installation hole used for a bolt to penetrate through, and the interior of the first threaded blind hole is in threaded connection with a plugging piece used for plugging the opening end of the first threaded blind hole in real time. And a plurality of high-voltage electrical test devices can be conveniently connected to the grounding rod at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to a protective earthing device for high voltage electrical test belongs to high voltage electrical test technical field. BACKGROUND

[0002] Earthing in high voltage electrical test is one of the key measures to ensure test safety and result accuracy. The main purpose of earthing is to rapidly discharge the excess charge on the tested equipment into the ground to prevent high voltage from causing harm to personnel and equipment, and also to reduce the influence of external electromagnetic interference on the test to ensure the accuracy of test data. The earthing rod is a commonly used earthing facility. At present, the number of earthing connection points on the earthing rod is small, and the earthing connection points cannot be increased or decreased according to the number of high voltage electrical test equipment. If a large number of earthing connection points are installed on the earthing rod in the initial state, the earthing rod will be difficult to carry and transport, so a protective earthing device for high voltage electrical test is needed to increase the earthing connection points as needed. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a protective earthing device for high voltage electrical test to solve the problems raised in the background art. The utility model realizes increasing or decreasing earthing connection points as needed, which facilitates the simultaneous connection of multiple high voltage electrical test equipment to the earthing rod.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented by the following technical scheme: a protective earthing device for high voltage electrical test, comprising an earthing rod, a conductive block is installed on the upper end of the earthing rod, detachable conductive columns are installed at both ends of the conductive block, a threaded head is connected and fixed to one end of the conductive column, a first threaded blind hole matched with the threaded head is formed on one side of the conductive column away from the threaded head, the threaded head on one of the conductive columns is threadedly connected in the first threaded blind hole on the other conductive column, a connecting lug for connecting the grounding wire is fixedly connected to the outer surface of the conductive column, a mounting hole for inserting a bolt is formed on one side of the connecting lug, and a plugging piece for plugging the opening end of the first threaded blind hole in real time is threadedly connected in the first threaded blind hole.

[0005] Further, the plugging piece comprises a plug, the plug for plugging the opening end of the first threaded blind hole is slidably installed in the first threaded blind hole, a spring is installed on the side of the plug facing the inner side of the first threaded blind hole, the spring is arranged along the length direction of the first threaded blind hole, and one end of the spring away from the plug is installed at the innermost side of the first threaded blind hole.

[0006] Further, a connecting piece is fixedly connected to one end of the spring away from the plug, and the connecting piece is pasted in the innermost side of the first threaded blind hole by glue.

[0007] Further, the lower end of the grounding rod is fixedly connected with a sharp head, and the sharp head is integrally formed with the grounding rod.

[0008] Further, two ends of the conductive block are provided with rectangular grooves, and conductive rectangular insertion blocks are inserted into the rectangular grooves, one side of the insertion block is provided with a second threaded blind hole matched with the threaded head, the threaded head on one conductive column is screwed into the second threaded blind hole, one side of the conductive block is provided with two circular holes communicated with the two rectangular grooves respectively, one side of the insertion block is provided with a screw hole aligned with the circular hole, and a screw with one end screwed into the screw hole is inserted into the circular hole.

[0009] Further, a through hole is formed in the middle of the lower surface of the conductive block, and the upper end of the grounding rod is installed in the through hole.

[0010] The utility model discloses beneficial effects:

[0011] 1, make the insertion block of processing second threaded blind hole insert in the rectangular groove on the conductive block, then utilize the screw to install the insertion block in the rectangular groove, complete the assembly of insertion block and conductive block, when the second threaded blind hole appears the damaged condition of thread in the matching process with the threaded head, can replace the insertion block after taking down the screw, compared with replacing the conductive block, reduce the replacement cost.

[0012] 2, make the threaded head on one conductive column screw into the second threaded blind hole, complete the assembly of conductive column and conductive block, make the threaded head on one conductive column screw into the first threaded blind hole on another conductive column, realize the assembly of two adjacent conductive columns, in turn, complete the assembly of multiple conductive columns, realize according to the number of high voltage electrical test equipment Increase or decrease the number of conductive column, facilitate multiple high voltage electrical test equipment simultaneously connected on the grounding rod, do not need to produce the grounding rod with numerous grounding connection points in the initial state, facilitate carrying and transportation.

[0013] 3, when the threaded head is screwed into the first threaded blind hole, the threaded head extrudes the plug, and the plug extrudes the spring to make the spring in a compressed state, when the threaded head is separated from the first threaded blind hole, the plug is moved to the position flush with the opening end of the first threaded blind hole under the action of the spring resilience, realizing the real-time plugging of the first threaded blind hole, preventing sundries from entering the first threaded blind hole. BRIEF DESCRIPTION OF DRAWINGS

[0014] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of non-restrictive embodiments with reference to the accompanying drawings:

[0015] Figure 1 It is the structural schematic drawing of the utility model for the protection grounding device of high voltage electrical test;

[0016] Figure 2 Another perspective view of the protective grounding device for high-voltage electrical test of the utility model;

[0017] Figure 3 The assembly schematic view of the threaded head, connecting lug, spring, plug and conductive column in the protective grounding device for high-voltage electrical test of the utility model;

[0018] Figure 4 The assembly schematic view of the threaded head, connecting lug, spring, plug and conductive column in the protective grounding device for high-voltage electrical test of the utility model;

[0019] Figure 5 The assembly schematic view of the threaded head, connecting lug, spring, plug and conductive column in the protective grounding device for high-voltage electrical test of the utility model;

[0020] Figure 6 The perspective view of the conductive block in the protective grounding device for high-voltage electrical test of the utility model;

[0021] Figure 7 The perspective view of the plug-in block in the protective grounding device for high-voltage electrical test of the utility model;

[0022] In the figure: 1 - grounding rod, 2 - plug-in block, 3 - conductive block, 4 - connecting lug, 5 - conductive column, 6 - screw, 7 - sharp head, 8 - plug, 9 - first threaded blind hole, 10 - mounting hole, 11 - threaded head, 12 - spring, 13 - connecting piece, 14 - through hole, 15 - rectangular slot, 16 - small hole, 17 - second threaded blind hole, 18 - screw hole. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0024] Please refer to Figure 1 and Figure 2 The utility model provides a technical scheme: the protective grounding device for high-voltage electrical test, including grounding rod 1, the sharp head 7 of grounding rod 1 lower end is connected and is fixed, wherein the sharp head 7 and grounding rod 1 are integrally formed structure, the design of sharp head 7 is favorable for reducing the resistance of grounding rod 1 and inserting in the ground.

[0025] Please refer to Figure 1 、 Figure 6 and Figure 7The upper end of the grounding rod 1 is provided with a conductive block 3, a through hole 14 is formed in the middle of the lower surface of the conductive block 3, the upper end of the grounding rod 1 is installed in the through hole 14, the stability of the connection between the grounding rod 1 and the conductive block 3 is improved, the two ends of the conductive block 3 are provided with detachable conductive columns 5, one end of the conductive column 5 is connected and fixed with a threaded head 11, the two ends of the conductive block 3 are provided with rectangular grooves 15, the rectangular grooves 15 are inserted with conductive rectangular blocks 2, one side of the rectangular block 2 is provided with a second threaded blind hole 17 matched with the threaded head 11, the threaded head 11 on one conductive column 5 is screwed in the second threaded blind hole 17, one side of the conductive block 3 is provided with two circular holes communicated with the two rectangular grooves 15 respectively, one side of the rectangular block 2 is provided with a screw hole 18 aligned with the circular hole, the circular hole is inserted with a screw 6 screwed in the screw hole 18, the rectangular block 2 with the second threaded blind hole 17 is inserted in the rectangular groove 15 of the conductive block 3, then the rectangular block 2 is installed in the rectangular groove 15 by using the screw 6, the assembly of the rectangular block 2 and the conductive block 3 is completed, when the second threaded blind hole 17 is damaged during cooperation with the threaded head 11, the rectangular block 2 can be replaced after the screw 6 is removed, compared with replacing the conductive block 3, the replacement cost is reduced.

[0026] Referring to Figures 1-5 One side of the conductive column 5 away from the threaded head 11 is provided with a first threaded blind hole 9 matched with the threaded head 11, the outer surface of the conductive column 5 is connected and fixed with a connecting lug 4 used for connecting the grounding wire, one side of the connecting lug 4 is provided with a mounting hole 10 used for inserting the bolt, the threaded head 11 on one conductive column 5 is screwed into the second threaded blind hole 17, the assembly of the conductive column 5 and the conductive block 3 is completed, the threaded head 11 on one conductive column 5 is screwed into the first threaded blind hole 9 of the other conductive column 5, the assembly of the adjacent two conductive columns 5 is realized, and the assembly of the plurality of conductive columns 5 is completed in turn, the number of the conductive columns 5 is realized according to the increase and decrease of the number of the high-voltage electrical test equipment, the plurality of high-voltage electrical test equipment is simultaneously connected to the grounding rod 1, the grounding rod 1 with a plurality of grounding connection points is not necessary in the initial state, and the grounding rod 1 is convenient to carry and transport.

[0027] Referring to Figures 2-5The plug 8 is installed in the first threaded blind hole 9 for blocking the opening end of the first threaded blind hole 9, one side of the plug 8 facing the inside of the first threaded blind hole 9 is installed with a spring 12, the spring 12 is arranged along the length direction of the first threaded blind hole 9, one end of the spring 12 away from the plug 8 is connected with a connecting piece 13, the connecting piece 13 is pasted in the innermost side of the first threaded blind hole 9 through glue, so as to limit one end of the spring 12 in the innermost side of the first threaded blind hole 9, when the threaded head 11 is screwed into the first threaded blind hole 9, the threaded head 11 presses the plug 8, the plug 8 presses the spring 12 to make the spring 12 in compression, when the threaded head 11 is separated from the first threaded blind hole 9, the plug 8 is moved to the position flush with the opening end of the first threaded blind hole 9 under the action of the spring 12, the real-time blocking of the first threaded blind hole 9 is realized, and the random entry of sundries into the first threaded blind hole 9 is prevented.

[0028] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A protective earthing device for high voltage electrical tests, comprising an earthing rod (1), characterized in that: The ground rod (1) upper end is provided with a conductive block (3), both ends of the conductive block (3) are provided with a detachable conductive column (5), one end of the conductive column (5) is connected and fixed with a threaded head (11), one side of the conductive column (5) away from the threaded head (11) is provided with a first threaded blind hole (9) matched with the threaded head (11), the threaded head (11) on one of the conductive columns (5) is screwed into the first threaded blind hole (9) on the other conductive column (5), the outer surface of the conductive column (5) is connected and fixed with a connecting lug (4) for connecting the ground wire, one side of the connecting lug (4) is provided with a mounting hole (10) for inserting a bolt, the first threaded blind hole (9) is screwed with a blocking piece for plugging the opening end of the first threaded blind hole (9).

2. The shielded grounding apparatus for high voltage electrical testing of claim 1, wherein: The blocking piece comprises a plug (8), the first threaded blind hole (9) is slidably provided with the plug (8) for plugging the opening end of the first threaded blind hole (9), one side of the plug (8) facing the inner side of the first threaded blind hole (9) is provided with a spring (12), the spring (12) is arranged along the length direction of the first threaded blind hole (9), one end of the spring (12) away from the plug (8) is arranged at the innermost side of the first threaded blind hole (9).

3. The shielded grounding apparatus for high voltage electrical testing of claim 2, wherein: One end of the spring (12) away from the plug (8) is connected and fixed with a connecting piece (13), the connecting piece (13) is pasted on the innermost side of the first threaded blind hole (9) by glue.

4. The shielded grounding apparatus for high voltage electrical testing of claim 1, wherein: The lower end of the ground rod (1) is connected and fixed with a sharp head (7), the sharp head (7) and the ground rod (1) are integrally formed.

5. The grounding device for high voltage electrical testing of claim 1, wherein: Both ends of the conductive block (3) are provided with a rectangular groove (15), the rectangular groove (15) is inserted with a conductive rectangular plug (2), one side of the plug (2) facing the outer side of the rectangular groove (15) is provided with a second threaded blind hole (17) matched with the threaded head (11), the threaded head (11) on one of the conductive columns (5) is screwed into the second threaded blind hole (17), one side of the conductive block (3) is provided with two circular holes communicated with the two rectangular grooves (15) respectively, one side of the plug (2) is provided with a screw hole (18) aligned with the circular hole, the circular hole is inserted with a screw (6) with one end screwed into the screw hole (18).

6. The shielded grounding apparatus for high voltage electrical testing of claim 1, wherein: The lower surface of the conductive block (3) is provided with a through hole (14) at the middle position, the upper end of the ground rod (1) is mounted in the through hole (14).

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