Three-phase short-circuit grounding wire for mobile power supply

Abstract

The utility model discloses a three-phase short-circuit ground wire for a mobile power supply, which comprises a clamping device and a ground wire, the clamping device comprises a clamp and a spring, the clamp is divided into a chuck and handles by taking a hinge point as a boundary, and the spring is arranged between the two handles so that the chuck is always kept in a clamping state. The handles are sleeved with elastic insulating layers wrapping the conductor ends and the insulating ends, one end of the grounding wire is connected with a wiring nose in a pressing mode, the other end of the grounding wire is fixed through a thermal shrinkable sleeve, and the wiring nose is connected with the conductor end at the hinge point of any handle through a bolt. The other end of the grounding wire extends towards the insulating end along the handle, penetrates through the elastic insulating layer and then is suspended to form a clamping section; the grounding wire is connected on the basis of an existing clamp, leading-out of a grounding device is achieved, a three-phase wire is clamped on the grounding wire to form a short circuit, if the three-phase wire is electrified in the wiring process, step-by-step power transmission operation is carried out by utilizing the protection characteristic of a superior power supply, and personal injury accidents caused by mistaken power transmission or device damage are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a three-phase short-circuit grounding wire for a mobile power source. Background Art

[0002] When inspecting and repairing electrical equipment in coal mines, it is necessary to power on for testing. Usually, a mobile three-phase power supply is clamped on the upper power supply side of the electrical equipment for power transmission testing. In order to facilitate operation and maintenance, the power supply is supplied in the form of a clamp, and the upper power supply is a mobile air switch. At the same time, in order to facilitate the identification of the power-off status, indicator lights are installed at both ends of the air switch. However, in actual work, we found that when power is transmitted step by step, once the air switch is not powered off or the indicator light is disconnected and has no indication, the test clamp will be directly energized, and the operator will be in danger of touching the power supply voltage, and personal safety cannot be guaranteed. Utility Model Content

[0003] The technical problem to be solved by the utility model is that during the existing operation process, personnel have the risk of accidental electric shock and their personal safety cannot be guaranteed.

[0004] In order to solve the above technical problems, the utility model provides a technical solution: a three-phase short-circuit grounding wire for a mobile power supply, including a clamping device and a grounding wire, the clamping device includes a clamp and a spring, the clamp is divided into a clamping head and a handle with a hinge point as the boundary, the spring is arranged between the two handles so that the clamping head always maintains a clamping state, and its characteristics are: the handle includes a conductor end and an insulating end integrally formed by injection molding, the handle is covered with an elastic insulating layer that wraps the conductor end and the insulating end, one end of the grounding wire is crimped with a wiring nose, and the other end is fixed by a heat shrink sleeve, the wiring nose is connected to the conductor end at the hinge point on any of the handles by a bolt, and the other end of the grounding wire extends along the handle to the insulating end through the elastic insulating layer and then hangs in the air to form a clampable section.

[0005] Furthermore, grooves for embedding the ground wire are provided on the conductor end and the insulating end.

[0006] Furthermore, a cover body is provided on the insulating end to cover the groove.

[0007] The beneficial effects of the utility model are:

[0008] 1. This application connects the grounding wire on the basis of the existing clamp to realize the lead-out of the grounding device, so that the three-phase line is clamped on the grounding wire to form a short circuit. If the three-phase line is energized during the wiring process, the protection characteristics of the upper power supply are utilized to perform power transmission operations step by step, thereby avoiding personal injury accidents caused by incorrect power transmission or damage to the device, eliminating the safety hazards caused by the "human" factor, reducing the labor intensity of personnel, and improving the safety and reliability of maintenance operations.

[0009] 2. The handle of the present application includes a conductor end and an insulating end that are integrally formed by injection molding. The handle is provided with an elastic insulating layer that wraps the conductor end and the insulating end, thereby increasing the insulation degree of the clip. The clip does not need to come into contact with the conductive parts when operating, and is safe to use. The elastic insulating layer presses the grounding wire tightly against the handle to prevent the grounding wire from moving around and causing the connection to loosen, thereby affecting the grounding quality.

[0010] 3. The conductor end and the insulating end of the present application are provided with grooves for embedding the grounding wire; the grounding wire is embedded in the groove, so that the shapes of the two handles are coordinated and the grounding wire is limited; a cover body is provided on the insulating end to cover the groove, and the cover body is pressed against the groove by the elastic force of the elastic insulating layer. The cover body is made of insulating material to ensure that the grounding wire connection is stable and when a person holds the elastic insulating layer, there is an additional insulating protective layer, which further increases the insulation protection capability.

[0011] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only three of the drawings in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 This is a schematic diagram of the structure of this application;

[0014] Figure 2 This is a schematic diagram of the structure for grounding wire layout.

[0015] Figure 3 for Figure 2 Middle CC section view.

[0016] In the figure, 1-ground wire, 2-spring, 3-chuck, 4-handle, 5-wire nose, 6-heat shrink sleeve, 7-bolt, 8-groove, 9-cover, 10-hinge point, 11-elastic insulation layer;

[0017] A-conductor end, B-insulation end. DETAILED DESCRIPTION

[0018] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0019] It should be understood that the various steps described in the method implementation of the present utility model can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present utility model is not limited in this respect.

[0020] The names of the messages or information exchanged between multiple devices in the implementation manner of the present utility model are only used for illustrative purposes, and are not used to limit the scope of these messages or information. Example

[0021] like Figure 1 As shown, a three-phase short-circuit grounding wire for a mobile power source comprises a clamping device and a grounding wire 1, the clamping device comprises a clamp and a spring 2, the clamp is divided into a clamp head 3 and a handle 4 with a hinge point 10 as the boundary, the spring 2 is arranged between the two handles 4 so that the clamp head 3 always keeps a clamping state, the handle 4 comprises a conductor end A and an insulating end B which are integrally formed by injection molding, the handle 4 is sleeved with an elastic insulating layer 11 for wrapping the conductor end A and the insulating end B, one end of the grounding wire 1 is crimped with a wiring nose 5, and the other end is fixed by a heat shrink sleeve 6 (easy to operate, the end of the grounding wire 1 is fixed, and it is beautiful and neat), the wiring nose 5 is connected to the conductor end A at the hinge point on any handle 4 by a bolt 7 (the wiring nose is connected by the bolt 7, which is convenient for disassembly and assembly, and can realize the separate use of the clamp and the grounding wire 1), the other end of the grounding wire 1 extends along the handle 4 to the insulating end B through the elastic insulating layer 11 and then hangs in the air to form a clampable section.

[0022] Among them, the handle 4 includes a conductor end A and an insulating end B that are integrally formed by injection molding. The handle 4 is provided with an elastic insulating layer 11 that wraps the conductor end A and the insulating end B, thereby increasing the insulation degree of the clip. When operating the clip, there is no need to contact the conductive parts, and the use is safe. In addition, the elastic insulating layer 11 presses the grounding wire 1 tightly against the handle 4 to prevent the grounding wire 1 from moving around and causing the connection to loosen, thereby affecting the grounding quality. Example

[0023] like Figure 2 and Figure 3As shown, this embodiment is obtained by adding technical features such as a groove 8 and a cover 9 on the basis of the first embodiment. The remaining technical features are the same as those of the first embodiment, and the similarities are not repeated here. The difference between this embodiment and the first embodiment is that: a groove 8 for embedding the grounding wire 1 is provided on the conductor end A and the insulating end B; and a cover 9 is provided on the insulating end B to cover the groove 8.

[0024] In this embodiment, the grounding wire 1 is embedded in the groove 8, so that the shapes of the two handles 4 are coordinated and the grounding wire 1 is limited; at the same time, the cover body 9 is covered on the groove 8, and the elastic force of the elastic insulating layer 11 is used to press the cover body 9 on the groove 8 to clamp the grounding wire 1 to prevent loose contact due to shaking. The cover body 9 is made of insulating material to ensure that the grounding wire 1 is stably connected and when a person holds the elastic insulating layer 11, there is an additional insulating protection layer, which further increases the insulation protection capability.

[0025] When in use, before testing the electrical equipment, move the mobile power supply to the test area, and the power clamp on the load side of the mobile power supply is in the clampable section position clamped on the grounding wire 1. First, operate the handle 4 to clamp the clamp 3 on the grounding bolt 7 of the electrical equipment to form a grounding protection circuit, and then confirm the closing and opening positions of the air switch of the mobile power supply. After confirming that it is in the open position, the first-level fixed power supply can be powered, the second-level mobile power supply can be powered, and the power indicator light is on. Remove the power clamp on the load side of the mobile power supply from the clampable section position of the grounding wire 1 and clamp it to the main power circuit of the electrical equipment. After the steps are completed, push the air switch of the mobile power supply to the closing position, and the electrical equipment can be powered for testing, thereby completing the entire process of the power supply operation.

[0026] After the test is completed, first open the air switch of the mobile power supply, then turn off the primary fixed power supply, and the power indicator light of the mobile power supply goes out, indicating that there is no power in the line. After the power test and discharge operations, remove the load side power supply clamp and clamp it in the clampable section of the grounding wire 1. Use the operating handle 4 to remove the clamp 3 from the grounding bolt 7 of the electrical equipment, and place it in the designated position with the mobile power supply to complete the operation.

[0027] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A three-phase short-circuit grounding wire for a mobile power source, comprising a clamping device and a grounding wire, wherein the clamping device comprises a clamp and a spring, wherein the clamp is divided into a clamping head and a handle at a hinge point, and the spring is arranged between the two handles to keep the clamping head in a clamping state at all times, wherein the clamping device comprises a clamping device and a grounding wire, wherein the clamping device comprises a clamp and a spring, wherein the clamp is divided into a clamping head and a handle at a hinge point, and the spring is arranged between the two handles to keep the clamping head in a clamping state at all times, and wherein the clamping device comprises a clamping device and a grounding wire, wherein the clamping device comprises a clamping device and a spring, ... grounding wire, wherein the clamping The handle includes a conductor end and an insulating end that are integrally formed by injection molding. The handle is provided with an elastic insulating layer that wraps the conductor end and the insulating end. A wiring nose is crimped on one end of the grounding wire, and the other end is fixed by a heat shrink sleeve. The wiring nose is connected to the conductor end at any hinge point on the handle by a bolt. The other end of the grounding wire extends along the handle toward the insulating end, passes through the elastic insulating layer, and is suspended in the air to form a clampable section.

2. The three-phase short-circuit grounding wire for mobile power supply according to claim 1 is characterized in that: The conductor end and the insulating end are provided with grooves for the grounding wire to be embedded.

3. The three-phase short-circuit grounding wire for mobile power supply according to claim 2 is characterized in that: A cover body for covering the groove is arranged on the insulating end.

Images