Three-phase grounding device convenient to disassemble

Abstract

This invention discloses a three-phase grounding device that is easy to assemble and disassemble, relating to the field of power safety technology. It includes a base, a central insulating rod, an adjusting assembly, and two side insulating rods. The central insulating rod is vertically fixed to the base. The two side insulating rods are rotatably mounted on the base via a hinged structure and are located on either side of the central insulating rod. Grounding wire operating heads are installed at the top of the central insulating rod and the two side insulating rods. This invention integrates the originally separate three grounding rods into a single device by setting up a base, a central insulating rod, and two rotatable side insulating rods. Operators only need to carry this single integrated device to perform grounding work on three-phase transmission lines, significantly reducing the burden of climbing and improving work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of power safety technology, and specifically relates to a three-phase grounding device that is easy to install and disassemble. Background Technology

[0002] The grounding wire is a conductor that is directly connected to the earth. Also known as the safety return line, it is an essential device in the power system to ensure the personal safety of power production and maintenance personnel. It is hailed as the "lifeline" of the workers.

[0003] Reliable grounding of de-energized equipment is one of the important technical measures to ensure power safety. Its main function is to release residual charge on power equipment and prevent electric shock accidents caused by sudden power restoration or induced voltage generated by nearby live equipment and lines.

[0004] When inspecting or maintaining three-phase transmission lines, it is usually necessary to ground the three-phase conductors. Currently, most existing three-phase grounding operations adopt a split structure, that is, the operator carries three independent grounding rods and climbs to the height of the pole, and installs the three grounding rods onto the three-phase conductors one by one.

[0005] The three independent grounding rods are inconvenient to carry while climbing. Furthermore, after connecting the spring-type operating head of the grounding rod to the power transmission line, there is no effective connection or support structure between the grounding rods, leaving them in an independent, suspended state. In outdoor working environments with strong winds, the grounding rods are easily affected by the wind and sway significantly. This swaying may not only cause the spring-type operating head to loosen and fall off, but also greatly increases the safety hazard of the grounding rod falling from a height.

[0006] Therefore, we propose a three-phase grounding device that is easy to install and remove to solve the above problems. Summary of the Invention

[0007] To address the problems of inconvenience in carrying three independent grounding rods while climbing, and the lack of effective support and poor wind resistance after installation, this invention provides a three-phase grounding device that is easy to assemble and disassemble.

[0008] The solution adopted by the present invention to solve its technical problem is: a three-phase grounding device that is easy to assemble and disassemble, including a base, a central insulating rod, an adjustment assembly and two side insulating rods, wherein the central insulating rod is vertically fixed on the base; The two side insulating rods are rotatably mounted on the base via a hinged structure and are located on both sides of the middle insulating rod; The top of the central insulating rod and the two side insulating rods are all equipped with grounding wire operating heads; An adjustment component is mounted on the central insulating rod and linked to the two side insulating rods to adjust and lock the opening angle of the side insulating rods.

[0009] Preferably, the grounding wire operating head includes a U-shaped clamp and a movable pressure block, wherein the movable pressure block is slidably disposed within the opening of the U-shaped clamp; An insulating guide rod is fixedly connected to the bottom of the movable pressure block. The insulating guide rod extends downward and passes through the inner cavity of the corresponding middle insulating rod or side insulating rod. A spring is fitted onto the insulating guide rod, and the two ends of the spring are fixedly connected to the bottom of the movable pressure block and the inner bottom wall of the U-shaped clamp, respectively.

[0010] Preferably, it also includes three insulating ropes, which are disposed in the inner cavity of the middle insulating rod or the side insulating rod. One end of the insulating rope is connected to the inner end of the insulating guide rod, and the other end passes through the wire hole opened in the base and is connected to a pull ring.

[0011] Preferably, the central insulating rod is provided with a plurality of positioning holes spaced apart from top to bottom.

[0012] Preferably, the adjusting assembly includes a sliding sleeve, a positioning element, and two pull rods. The sliding sleeve is slidably sleeved on the outer wall of the middle insulating rod, and the two ends of the pull rods are respectively hinged to the sliding sleeve and the side insulating rod. The positioning element is detachably installed between the sliding sleeve and any of the positioning holes.

[0013] Preferably, the positioning element is a positioning bolt, which passes through a threaded hole on the side wall of the sliding sleeve and is inserted into the corresponding positioning hole.

[0014] Preferably, the side insulating rod is an adjustable length structure, comprising an insulating screw and an insulating cylinder that are threaded together, the interior of the insulating screw is hollow, and both ends of the insulating screw are provided with openings.

[0015] Preferably, it also includes a three-phase grounding flexible copper wire, the three terminals of which are respectively connected to three grounding wire operating heads.

[0016] Preferably, handles are fixedly installed on both the front and rear sides of the base.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention integrates the three originally separate grounding rods into one device by setting a base, a central insulating rod, and two rotatable side insulating rods. Operators only need to carry a single integrated device to perform grounding work on three-phase transmission lines, which significantly reduces the burden of climbing and improves work efficiency.

[0018] 2. This invention utilizes an adjustment component to link the two side insulating rods with the central insulating rod. The opening angle of the side insulating rods can be adjusted and locked according to the distance between transmission lines, forming a stable structure that supports each other between the central insulating rod and the two side insulating rods. This significantly enhances the wind resistance stability of the device in outdoor windy environments, preventing the grounding wire operating head from loosening or the entire device from falling from a height due to swaying, thus greatly ensuring the safety of the operators.

[0019] 3. This invention uses a pull ring to pull the guide rod and movable pressure block downwards synchronously under the pull of the insulating rope, thereby controlling the opening and closing of the movable pressure block. This enables the grounding wire operating head to be quickly and conveniently separated from the transmission line, greatly improving the efficiency of grounding operations. Furthermore, the entire process is insulated, further ensuring the safety of high-altitude operations.

[0020] 4. By designing the side insulating rod as a length-adjustable structure with the threaded connection between the insulating screw and the insulating barrel, the length of the rod can be adaptively adjusted according to the actual distance between the two transmission lines, further improving the adaptability of the device to three-phase transmission lines of different specifications. Attached Figure Description

[0021] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a frontal cross-sectional view of the present invention; Figure 3 This is a front view cross-sectional structural diagram of the side insulating rod of the present invention.

[0022] In the diagram: 1. Base, 2. Central insulating rod, 3. Side insulating rod, 31. Insulating threaded rod, 32. Insulating threaded cylinder, 41. Sliding sleeve, 42. Positioning bolt, 43. Upper hinge seat, 44. Pull rod, 45. Lower hinge seat, 5. Ear plate, 6. Handle, 7. Grounding wire operating head, 71. U-shaped clamp, 72. Movable pressure block, 73. Spring, 74. Insulating guide rod, 81. Insulating rope, 82. Pull ring, 9. Three-phase grounding soft copper wire. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figure 1-3 This invention provides a technical solution for a three-phase grounding device that is easy to assemble and disassemble: Example 1: according to Figure 1 and Figure 2 As shown, it includes a base 1, a central insulating rod 2, an adjustment assembly, and two side insulating rods 3. Handles 6 are fixedly installed on both the front and rear sides of the base 1 for easy carrying by operators.

[0025] The central insulating rod 2 is vertically fixed on the base 1, and the two side insulating rods 3 are rotatably installed on the base 1 through a hinge structure and are located on both sides of the central insulating rod 2. The specific hinge structure includes ear plates 5 set on both sides of the base 1. The bottom end of the side insulating rod 3 is hinged to the ear plate 5 through a pin, thereby realizing the opening and closing movement of the side insulating rod 3 relative to the central insulating rod 2.

[0026] The top of the central insulating rod 2 and the two side insulating rods 3 are all equipped with grounding wire operating heads 7. The grounding wire operating head 7 includes a U-shaped clamp 71 and a movable pressure block 72. The movable pressure block 72 is slidably disposed in the opening of the U-shaped clamp 71 for clamping or releasing the transmission line.

[0027] An insulating guide rod 74 is fixedly connected to the bottom of the movable pressure block 72. The insulating guide rod 74 extends downward and passes through the inner cavity of the corresponding middle insulating rod 2 or side insulating rod 3. A spring 73 is sleeved on the insulating guide rod 74. The two ends of the spring 73 are fixedly connected to the bottom of the movable pressure block 72 and the inner bottom wall of the U-shaped clamp 71, respectively. The elastic force of the spring 73 makes the movable pressure block 72 in a clamped state by default.

[0028] To facilitate the release of the grounding wire operating head 7, this embodiment also includes three insulating ropes 81. The insulating ropes 81 are installed in the inner cavity of the middle insulating rod 2 or the side insulating rod 3. One end of the insulating rope 81 is connected to the inner end of the insulating guide rod 74, and the other end passes through the wire hole opened in the base 1 and is connected to a pull ring 82. When it is necessary to remove the grounding wire, the operator pulls down the corresponding pull ring 82, and the insulating rope 81 pulls the insulating guide rod 74 downward, causing the movable pressure block 72 to move downward against the resistance of the spring 73, thereby making the opening of the U-shaped clamp 71 larger and releasing the transmission conductor.

[0029] The adjustment component is mounted on the central insulating rod 2 and is linked to the two side insulating rods 3 to adjust and lock the opening angle of the side insulating rods 3.

[0030] Specifically, the middle insulating rod 2 is provided with several positioning holes spaced apart from top to bottom. The adjustment assembly includes a sliding sleeve 41, a positioning element, and two pull rods 44. The sliding sleeve 41 is slidably sleeved on the outer wall of the middle insulating rod 2. The two ends of the pull rods 44 are respectively hinged to the upper hinge seat 43 and the lower hinge seat 45 through pins. The upper hinge seat 43 is fixedly installed on the side of the sliding sleeve 41, and the lower hinge seat 45 is fixedly installed on the outer side wall of the side insulating rod 3.

[0031] When the sliding sleeve 41 slides on the middle insulating rod 2, the pull rod 44 pushes or pulls the two side insulating rods 3 to rotate around the hinge point on the base 1, thereby changing the opening angle between the two side insulating rods 3 to adapt to three-phase transmission lines with different spacing.

[0032] To lock the angle, a positioning element is detachably installed between the sliding sleeve 41 and any positioning hole. In this embodiment, the positioning element is a positioning bolt 42. The positioning bolt 42 passes through the threaded hole opened on the side wall of the sliding sleeve 41 and is inserted into the corresponding positioning hole. After tightening, the sliding sleeve 41 can be fixed in a suitable position on the middle insulating rod 2, thereby locking the opening angle of the side insulating rod 3.

[0033] In addition, this embodiment also includes a three-phase grounding soft copper wire 9, the three terminals of which are respectively connected to three grounding wire operating heads 7, and the other end is converged and connected to the grounding terminal.

[0034] In practical use, the three-phase grounding device of the present invention, which is easy to assemble and disassemble, includes the following steps: After the operator carries the device to the work position, the first step is to ground the intermediate phase conductor. The operator pulls the pull ring 82 in the middle position. Under the action of the pull force, the insulating rope 81 pulls the insulating guide rod 74 in the middle insulating rod 2 to move downwards in sync. This causes the movable pressure block 72 to slide downwards against the elastic force of the spring 73, thereby opening the opening of the U-shaped clamp 71. The U-shaped clamp 71 at the top of the middle insulating rod 2 is aligned and put into the middle transmission conductor. Then, the operator releases the pull ring 82. Under the action of the return elastic force of the spring 73, the insulating guide rod 74 springs back upwards, causing the movable pressure block 72 to move upwards, pressing the transmission conductor tightly into the U-shaped clamp 71, completing the reliable grounding of the intermediate phase. At the same time, the device is suspended on the middle transmission conductor to facilitate the subsequent grounding operation of the transmission conductors on both sides. After the intermediate phase is fixed, the operator loosens the positioning bolt 42 and releases the lock on the sliding sleeve 41. At this time, the operator holds the sliding sleeve 41 and slides it downward. Through the movement of the sliding sleeve 41, the two side insulating rods 3 are driven to rotate outward around the hinge point on the base 1 through the linkage of the pull rod 44, and their opening angle is adjusted. When the grounding wire operating head 7 at the top of the two side insulating rods 3 is accurately aligned with the position of the two phase transmission conductors on the outside, stop the adjustment, tighten the positioning bolt 42, insert it into the corresponding positioning hole, and firmly lock the sliding sleeve 41 on the middle insulating rod 2. Finally, the workers pulled the corresponding pull rings 82 on both sides of the base 1 to connect the grounding wire operation heads 7 on both sides to the outer two-phase transmission conductors, thus completing the three-phase grounding operation.

[0035] Example 2: Based on Example 1, such as Figure 3 As shown, this embodiment is designed to adapt to transmission lines with different line spacings.

[0036] The side insulating rod 3 is designed with an adjustable length structure, specifically including an insulating screw 31 and an insulating cylinder 32 that are threaded together. The interior of the insulating screw 31 is hollow, and both ends are provided with openings, which not only ensures the passage space for the insulating rope 81, but also allows the overall length of the side insulating rod 3 to be changed by rotating the insulating screw 31 or the insulating cylinder 32, so as to further fine-tune the position of the grounding wire operating head 7 and ensure accurate connection.

Claims

1. A three-phase grounding device that is easy to assemble and disassemble, comprising a base, a central insulating rod, an adjusting assembly, and two side insulating rods, characterized in that: The central insulating rod is vertically fixed to the base; The two side insulating rods are rotatably mounted on the base via a hinged structure and are located on both sides of the middle insulating rod; The top of the central insulating rod and the two side insulating rods are all equipped with grounding wire operating heads; An adjustment component is mounted on the central insulating rod and linked to the two side insulating rods to adjust and lock the opening angle of the side insulating rods.

2. The three-phase grounding device that is easy to assemble and disassemble according to claim 1, characterized in that: The grounding wire operating head includes a U-shaped clamp and a movable pressure block, the movable pressure block being slidably disposed within the opening of the U-shaped clamp; An insulating guide rod is fixedly connected to the bottom of the movable pressure block. The insulating guide rod extends downward and passes through the inner cavity of the corresponding middle insulating rod or side insulating rod. A spring is fitted onto the insulating guide rod, and the two ends of the spring are fixedly connected to the bottom of the movable pressure block and the inner bottom wall of the U-shaped clamp, respectively.

3. The three-phase grounding device that is easy to assemble and disassemble according to claim 2, characterized in that: It also includes three insulating ropes, which are set in the inner cavity of the middle insulating rod or the side insulating rod. One end of the insulating rope is connected to the inner end of the insulating guide rod, and the other end passes through the wire hole opened in the base and is connected to a pull ring.

4. The three-phase grounding device that is easy to assemble and disassemble according to claim 1, characterized in that: The central insulating rod is provided with several positioning holes spaced apart from top to bottom.

5. The three-phase grounding device for easy assembly and disassembly according to claim 4, characterized in that: The adjustment assembly includes a sliding sleeve, a positioning element, and two pull rods. The sliding sleeve is slidably fitted onto the outer wall of the central insulating rod, and the two ends of the pull rods are respectively hinged to the sliding sleeve and the side insulating rod. The positioning element is detachably installed between the sliding sleeve and any of the positioning holes.

6. The three-phase grounding device that is easy to assemble and disassemble according to claim 5, characterized in that: The positioning element is a positioning bolt, which passes through a threaded hole on the side wall of the sliding sleeve and is inserted into the corresponding positioning hole.

7. The three-phase grounding device that is easy to assemble and disassemble according to claim 1, characterized in that: The side insulating rod is an adjustable length structure, including an insulating screw and an insulating cylinder that are threaded together. The interior of the insulating screw is hollow, and both ends of the screw have openings.

8. The three-phase grounding device that is easy to assemble and disassemble according to claim 1, characterized in that: It also includes a three-phase grounding soft copper wire, the three terminals of which are respectively connected to three grounding wire operating heads.

9. The three-phase grounding device that is easy to assemble and disassemble according to claim 1, characterized in that: Handles are fixedly installed on both the front and rear sides of the base.

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