Ground wire hanging device convenient for disconnecting switch maintenance

Abstract

The utility model discloses a ground wire hitching device convenient for disconnecting switch maintenance, which comprises a support plate and a hitching piece, the hitching piece comprises a first hitching body and a second hitching body which are fixedly connected with each other to form an L shape, the second hitching body is arranged above the first hitching body, and the first hitching body is arranged above the second hitching body. The length of the first hitching body is greater than that of the second hitching body, the first hitching body is horizontally arranged, one end, far away from the second hitching body, of the first hitching body is provided with a connecting part, and the connecting part is detachably and fixedly connected with a static contact of a disconnecting link of the disconnecting switch; one end of the supporting plate is provided with a step and forms a step surface in the horizontal direction, the supporting plate is connected with a static contact of a disconnecting link of the disconnecting switch, and the lower end of the connecting part is in contact with or fixed to the step surface in an abutting mode. According to the scheme, the structure is simple, use and maintenance of the disconnecting switch are convenient, high-altitude ground wire installation is safe, and the ground wire hanging operation efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of grounding technology for disconnecting switches, and specifically relates to a grounding wire hanging device that facilitates the maintenance of disconnecting switches. Background Technology

[0002] Currently, installing grounding wires on disconnect switches is a necessary part of disconnect switch maintenance. During maintenance, a set of grounding wires needs to be installed at the stationary contact of the disconnect switch (on the substation cable side) to ensure the safety of maintenance personnel. Because the disconnect switch is more than 4 meters above the ground, maintenance personnel need to carry the grounding wires and use A-frame ladders to install and remove them, which is inefficient and poses risks of falls and electric shock. For maintenance of 6 disconnect switches at a single station, personnel use 4-meter A-frame ladders to climb, requiring four separate climbs just to install the grounding wires, resulting in slow efficiency. Furthermore, when carrying the grounding wires and climbing the ladder, two people are needed to hold the ladder together, wasting manpower and posing a risk of falling objects. When the disconnect switch being maintained is in a section or elevated station disconnect switch room, two people need to carry 4 sets of grounding wires and insulating tools such as voltage detectors, walking 2 kilometers round trip to the track area to install the contact rail grounding wires, taking approximately one hour, wasting both time and manpower. The grounding wire of the disconnect switch is 8 meters long and weighs 15KG each, requiring a lot of physical effort to move back and forth.

[0003] Therefore, a new technology is needed to solve the problems of safety hazards and low efficiency in the installation of grounding wires at high altitudes in existing technologies. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a grounding wire mounting device that facilitates the maintenance of disconnecting switches. This device makes it easy to mount the grounding wire and is safer and more efficient when installing the grounding wire at high altitudes.

[0005] The present invention adopts the following technical solution:

[0006] A grounding wire mounting device for facilitating the maintenance of disconnect switches includes a support plate and a mounting bracket. The mounting bracket includes a first mounting body and a second mounting body that are fixedly connected to each other in an L-shape. The second mounting body is located above the first mounting body. The length of the first mounting body is greater than the length of the second mounting body. The first mounting body is horizontally positioned and has a connecting part at one end away from the second mounting body. The connecting part is detachably and fixedly connected to the stationary contact of the disconnect switch knife switch.

[0007] The support plate has a step at one end, forming a stepped surface in the horizontal direction. The support plate is connected to the stationary contact of the disconnector switch. The lower end of the connection part contacts or abuts against the stepped surface for fixation.

[0008] As a further improvement to the technical solution of this utility model, the hanger also includes a connector, one end of which is provided with a connecting hole for the first hanger body to be inserted, and the other end is provided with a first through hole for the bolt of the disconnect switch cable to pass through; the connector forms the connecting part.

[0009] As a further improvement to the technical solution of this utility model, the depth of the connecting hole is not less than 45 mm.

[0010] As a further improvement to the technical solution of this utility model, the bottom surface of the connector is planar, the step also includes a first side surface that is connected to the step surface in an L-shape, and the end face of the connector near the first side surface is an arc surface.

[0011] As a further improvement to the technical solution of this utility model, the first hanger is provided with a groove, which is located inside the connection hole.

[0012] As a further improvement to the technical solution of this utility model, the groove is located at the center of the length range of the first hanger extending into the connecting hole.

[0013] As a further improvement to the technical solution of this utility model, the upper end of the support plate is also provided with a second connecting hole through which the bolt of the corresponding disconnecting switch cable can pass.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The grounding wire mounting device in this solution facilitates the maintenance of disconnecting switches. It has a simple structure and is easy to install grounding wires. When maintaining disconnecting switches in the section and elevated station, there is no need to go to the section to install or remove the grounding wire at the end bend. This eliminates the unsafe factors of installing grounding wires at height and saves time. While improving the efficiency of grounding wire installation, it also greatly reduces the labor intensity of the workers and reduces labor costs. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 This is an isometric view of the connection structure between the grounding wire device and the disconnecting switch of this utility model;

[0018] Figure 2 This is a schematic diagram of one side of the connection structure between the grounding wire device and the disconnecting switch of this utility model;

[0019] Figure 3 This is a schematic diagram of the other side of the connection structure between the grounding wire device and the disconnecting switch of this utility model;

[0020] Figure 4This is a top view of the connection structure between the grounding wire device and the disconnecting switch of this utility model;

[0021] Figure 5 yes Figure 4 Enlarged view of the structure of part A in the middle.

[0022] Figure label:

[0023] 1-Support plate; 11-Step; 111-Step surface;

[0024] 2-Hanging component; 21-First hanging body; 22-Second hanging body;

[0025] 3-Connector; 31-Connecting hole; 32-First through hole; 33-First section; 34-Second section;

[0026] 4-Isolating switch knife switch stationary contact; 41-Bolt;

[0027] 5-Grounding system. Detailed Implementation

[0028] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0029] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0030] Reference Figures 1 to 5A grounding wire device for facilitating the maintenance of disconnecting switches includes a support plate 1 and a mounting bracket 2. The mounting bracket 2 is L-shaped and can be made of silver-copper alloy hard copper wire. The mounting bracket 2 includes a first mounting body 21 and a second mounting body 22 fixedly connected to each other in an L-shape. The second mounting body 22 is located above the first mounting body 21. The length of the first mounting body 21 is greater than the length of the second mounting body 22. The first mounting body 21 is horizontally positioned, and a connecting part is provided at one end away from the second mounting body 22. The connecting part is detachably and fixedly connected to the stationary contact 4 of the disconnecting switch. One end of the support plate 1 has a step 11, forming a stepped surface 111 in the horizontal direction. The support plate 1 is connected to the stationary contact 4 of the disconnecting switch, and the lower end of the connecting part contacts or abuts against the stepped surface 111 for fixation. Support plate 1 can be made of aluminum alloy and connected to the stationary contact 4 of the disconnector switch using M16*60MM fully threaded bolts 41. This fixes and supports the hanger 2, preventing it from rotating. Both the copper terminal and the aluminum alloy support plate 1 are connected and fixed to the stationary contact 4 of the disconnector switch using M16*60MM fully threaded bolts 41, with a torque of 80 N.M.

[0031] The grounding system 5 can be attached to the first mounting body 21, and the second mounting body 22 can prevent the grounding system from detaching from the end of the first mounting body 21. A schematic diagram of the forward installation of the grounding ring on the stationary contact 4 of the disconnector switch is shown below. Figure 1 As shown, there is a support plate 1 on the back for support, which can ensure that the grounding wire is stable and reliable and is not easily deformed or detached.

[0032] This solution provides a simple grounding wire installation device for easy maintenance of disconnecting switches. When maintaining disconnecting switches in sections and elevated stations, the upper end of the grounding system 5 is simply attached to the mounting bracket 2, i.e., to the first mounting body 21. This eliminates the need to go to the section to remove the end bend grounding wire or disassemble the structure at the stationary contact of the disconnecting switch. The grounding wire can be installed at the stationary contact of the disconnecting switch (on the substation cable side). After maintenance, the grounding system 5 is removed from the first mounting body 21, completing the removal of the switch grounding wire. This eliminates the safety risks of installing grounding wires at heights and saves time. While improving the efficiency of grounding wire installation, it also significantly reduces the labor intensity of workers and lowers labor costs.

[0033] During maintenance, maintenance personnel can install and remove the switch grounding wire directly on the ground, enabling safer and faster installation and removal, thus improving productivity and efficiency. The mounting bracket 2 connects to the stationary contact 4 of the disconnector switch via M16*60MM fully threaded bolts 41, and uses an aluminum alloy support plate 1 to enhance its mechanical strength. Maintenance personnel only need to carry grounding wires of suitable length, eliminating the need to transport heavy disconnector switch grounding wires and related installation components, saving manpower and ensuring better maintenance quality and task completion. Personnel allocation can be differentiated for switch maintenance in rooms and tunnels, allowing for more efficient completion of maintenance tasks.

[0034] Specifically, the mounting bracket 2 further includes a connector 3, which is preferably a terminal block or a copper terminal. One end of the connector 3 has a connection hole 31 into which the first mounting body 21 can be inserted, and the other end has a first through hole 32 through which the bolt 41 of the disconnector switch cable can pass. The connector 3 can be connected to the bolt 41 of the cable near the edge of the disconnector switch, and the connector 3 forms the connection part. The end of the connector 3 near the first mounting body 21 protrudes from the edge of the disconnector switch to prevent the grounding system 5 from colliding with the disconnector switch when it is mounted on the first mounting body 21. (See attached figure.) Figure 2 As shown.

[0035] See attached document Figure 4 and 5 As shown, the connector 3 includes a first segment 33 and a second segment 34 that are fixedly connected to each other. A connecting hole 31 is provided on the first segment 33. The thickness of the second segment 34 in the horizontal direction is less than the thickness of the first segment 33 to facilitate the passage of the bolt 41 for connection. The thickness of the first segment 33 is larger, which facilitates the opening of the connecting hole 31. The connection node between the first segment 33 and the second segment 34 adopts a smooth transition or a sloped transition. The opening of the connecting hole 31 is located on the first segment 33 at the end away from the second segment 34. A first through hole 32 is provided on the second segment 34.

[0036] Specifically, the depth of the connecting hole 31 is not less than 45 mm, and the length of the first hanger 21 extending into the connecting hole 31 is preferably 45 mm.

[0037] Specifically, the bottom surface of the connector 3 is planar, and the step 11 also includes a first side surface that is connected to the step surface 111 in an L-shape. The end face of the connector 3 near the first side surface is an arc surface, and the end of the connector 3 is designed to prevent sharp corners from colliding with the support plate 1 and causing structural damage.

[0038] Specifically, the connector 3 is provided with a groove, which is located outside the connector 31 and within the range corresponding to the first hanger 21, with the groove opening facing upward and disposed on the same side as the second hanger 22.

[0039] Specifically, the groove is located at the center of the length range of the first hook body 21 extending into the connection hole 31.

[0040] Specifically, the upper end of the support plate 1 is also provided with a second connecting hole 31 through which the bolt 41 of the corresponding disconnecting switch cable can pass.

[0041] Example 1

[0042] In this embodiment, the mounting body is made of hard copper wire, which can have a cross-section of 120mm. 2 The silver-copper alloy hard copper wire is bent into an L-shaped connector 2. The first connector 21 is 195 mm long, the second connector 22 is 50 mm long, and the connector 3 is 150 mm. 2 The terminal block is preferably a QDT-150 copper terminal. The length of the hard copper wire extending into the terminal block is 45mm. At the position corresponding to the hard copper wire in the middle of the terminal block, the groove width is 10mm. A 10mm wide groove is ground at this position at the dovetail groove of the contact wire using a flat file. During crimping, the connector 3 part corresponding to the groove is pressed into the groove to ensure a more stable crimp. After the first hanger 21 extends into the connection hole 31, the connector 3 and the first hanger 21 can be fixed by crimping. The support plate 1 is made of aluminum, preferably a grounded flat aluminum material.

[0043] The method for manufacturing a grounding wire device that facilitates the maintenance of disconnecting switches, using this scheme, includes the following steps:

[0044] S1. Prepare materials. The specific specifications of each material are as follows: Hanging piece 2 uses 120mm... 2 Silver-copper alloy hard copper wire, connector 3 uses 150mm 2 The wiring terminal and support component 1 are made of grounded flat aluminum.

[0045] S2. 120mm 2 A straightener is used to straighten silver-copper alloy hard copper wire, which facilitates subsequent processing.

[0046] S3. Measure and mark the values ​​according to the drawing parameters of the connector 2, and bend it according to the markings to form an L-shaped connector 2, ensuring that the length of the first connector 21 is 195 mm and the length of the second connector 22 is 50 mm.

[0047] S4. The hard copper wire extends 45mm into the terminal block. Mark the position according to the drawing parameters, find the position of the hard copper wire corresponding to the middle position of the terminal block, and use a flat file to grind a 10mm wide groove at the dovetail groove of the contact wire at that position to ensure a more secure crimping.

[0048] S5. Use crimping pliers to crimp the wires according to the marked positions. When crimping, pay attention to controlling the angle between the hard copper wire and the terminal block.

[0049] S6. When the hole position of the 150mm² terminal bolt 41 does not match the diameter of the bolt 41 of the disconnector switch cable, it is necessary to enlarge the hole with an 18# drill bit on a bench drill. After enlarging the hole, use a flat file to grind it smooth.

[0050] S7. Measure and mark the dimensions according to the fabrication drawings of support plate 1, and cut according to the marks to ensure that the maximum length of the flat aluminum is 160 mm.

[0051] S8. Mark according to the parameters of the support plate 1 drawing, and use an 18# drill bit on a bench drill to drill two second through holes at the appropriate positions, with a distance of 55 mm between the two through holes.

[0052] S9. Mark according to the drawing parameters, cut the grounding flat aluminum at the appropriate position, cut a notch 31 mm long and 30 mm wide to form the step 11 structure.

[0053] Other aspects of the grounding wire device for facilitating the maintenance of disconnecting switches described in this utility model are found in the prior art and will not be repeated here.

[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A grounding wire mounting device for easy maintenance of disconnecting switches, characterized in that: It includes a support plate and a mounting bracket. The mounting bracket includes a first mounting body and a second mounting body that are fixedly connected to each other in an L-shape. The second mounting body is located above the first mounting body. The length of the first mounting body is greater than the length of the second mounting body. The first mounting body is horizontally arranged and has a connecting part at one end away from the second mounting body. The connecting part is detachably and fixedly connected to the stationary contact of the disconnector switch. The support plate has a step at one end, forming a stepped surface in the horizontal direction. The support plate is connected to the stationary contact of the disconnector switch. The lower end of the connection part contacts or abuts against the stepped surface for fixation.

2. The grounding wire device for facilitating the maintenance of disconnecting switches according to claim 1, characterized in that: The connector also includes a connector head, one end of which has a connecting hole for the first connector body to be inserted, and the other end has a first through hole for the bolt of the disconnect switch cable to pass through; the connector head forms the connecting part.

3. The grounding wire mounting device for facilitating the maintenance of disconnecting switches according to claim 2, characterized in that: The depth of the connecting hole is not less than 45 mm.

4. The grounding wire device for facilitating the maintenance of disconnecting switches according to claim 3, characterized in that: The bottom surface of the connector is planar, and the step also includes a first side surface that is connected to the step surface in an L-shape. The end face of the connector near the first side surface is an arc surface.

5. The grounding wire device for facilitating the maintenance of disconnecting switches according to claim 2, characterized in that: The first mounting body has a groove, which is located inside the connecting hole.

6. The grounding wire mounting device for facilitating the maintenance of disconnecting switches according to claim 5, characterized in that: The groove is located at the center of the length range in which the first hanger extends into the connecting hole.

7. The grounding wire mounting device for facilitating the maintenance of disconnecting switches according to claim 1, characterized in that: The upper end of the support plate is also provided with a second connecting hole through which the bolts of the corresponding disconnect switch cable can pass.

Images