High-voltage cabinet static contact live-line fastener
By designing a handle and ball head support structure in the twitchable position in the high-pressure cabinet, the poor contact problem caused by loosening of the static contact fixing screw is solved, and a stable and labor-saving tightening operation is achieved, avoiding the risk of sleeve slippage.
Patent Information
- Application Number
- CN202420468386.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-12
AI Technical Summary
After long-term use and electromagnetic vibration, the fixing screws are loose, resulting in poor contact, heated contacts, and abnormal current. The existing fastening equipment is difficult to support stably during operation, which can easily cause the sleeve to slip.
Design a high-voltage cabinet static contact live fastener, which can penetrate through the connecting post at the end of the insulating rod by setting a handle in a twitchable position, change the length of the power arm, and use the ball head and limit block to achieve the stability of the insulating rod and sleeve. Tighten to prevent the sleeve from slipping.
It realizes more labor-saving driving and stable tightening operations in the high-pressure cabinet, avoiding the sleeve slipping during tightening, and ensuring the stability and safety of operation.
Smart Images
Figure CN222244561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-voltage equipment maintenance, in particular to a live fastener for static contacts of a high-voltage cabinet. Background Art
[0002] High-voltage distribution cabinet refers to an electrical product with a voltage level of 3.6kV to 550kV, which plays the role of switching, controlling or protecting in power generation, transmission, distribution, power conversion and consumption of power systems. The static contacts in the high-voltage cabinet are responsible for engaging and disengaging with the moving contacts of the vacuum circuit breaker. After long-term use and electromagnetic vibration, the static contacts will have equipment defects such as loosening of the fixing screws of the static contacts, resulting in poor contact, heating of the contacts, abnormal current, etc., and require the use of fastening equipment for live fastening.
[0003] In order to achieve the purpose of labor-saving twisting, an extended handle is set at the end of the existing fastening device, and in order to facilitate operation in a smaller cabinet or to save more labor, the handle can be pulled to one end to change the length of the power arm. However, after such operation, the fastener cannot be stably supported by the handle, and its sleeve is easy to fall off from the mounting bolt of the static contact, which poses a risk. Therefore, we propose a live fastener for the static contact of a high-voltage cabinet. Utility Model Content
[0004] The purpose of the utility model is to provide a live fastener for the static contact of a high-voltage cabinet. By arranging a handle that can be pulled into a position and passing through a connecting column at the end of an insulating rod, the handle position can be pulled to change the length of the power arm, thereby achieving the purpose of driving the insulating rod to rotate more labor-savingly and avoiding touching the cabinet body. The ball head is used to support and stabilize the connecting column and achieve the purpose of tightening the insulating rod and the sleeve, thereby ensuring stability when operating the insulating rod and avoiding the sleeve from slipping off the bolt, thereby solving the problems raised in the background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a live fastener for a static contact of a high-voltage cabinet, comprising an insulating rod and a sleeve, wherein the sleeve is fixed at the end of the insulating rod, a connecting column is fixed at the other end of the insulating rod, a through hole is opened on the surface of the connecting column, a handle is connected to the connecting column through the through hole, a connecting rod is fixed at the middle position of the surface of the connecting column, the connecting rod is perpendicular to the surface of the connecting column, a ball head is sleeved on the outer ring of the connecting rod, and the outer ring of the connecting rod and the ball head are rotatably connected through a bearing.
[0006] By adopting the above technical solution, the sleeve is first sleeved on the outer ring of the static contact bolt and then held on the ball head to achieve stable support for the connecting column, the insulating rod and the sleeve. Afterwards, when adjusting the handle position and turning the handle, it can be ensured that the sleeve is stably sleeved on the bolt to avoid the sleeve slipping during the tightening process.
[0007] Optionally, a first limit block and a second limit block are respectively fixed to both ends of the handle, and the first limit block and the second limit block have the same size.
[0008] By adopting the above technical solution, the limit blocks are fixed at both ends of the handle, which can prevent the handle from slipping out of the through-hole of the connecting column.
[0009] Optionally, a screw groove is provided inside the second limiting block, and the second limiting block is screwed to the outer ring of the end of the handle through the screw groove.
[0010] By adopting the above technical solution, the second limit block can be removed when needed, and then the handle can be pulled out when needed to facilitate storage of the device.
[0011] Optionally, a rubber strip is fixedly attached to the inner surface of the hole, and a plurality of rubber strips are evenly arranged.
[0012] By adopting the above technical solution, when the handle is pressed to drive the connecting column and the insulating rod to rotate, the outer surface of the handle is pressed against the surface of the rubber strip, so that the handle will not slide in the through opening.
[0013] Optionally, the outer ring of the handle at one end of the second limiting block is provided with a thread, and the screw groove is screwed to the outer ring at the end of the handle through the thread.
[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0015] 1. The technical solution of the present application is to provide a handle that can be pulled to a position and passes through a connecting column at the end of the insulating rod. The handle can be pulled to change the position to change the length of the power arm, thereby achieving the purpose of driving the insulating rod to rotate more labor-savingly and avoiding touching the cabinet body. The ball head is used to support and stabilize the connecting column and achieve the purpose of tightening the insulating rod and the sleeve, thereby ensuring stability when operating the insulating rod and preventing the sleeve from slipping off the bolt.
[0016] 2. The technical solution of the present application connects the second limit block at one end of the handle to the end of the handle by screwing, so that the second limit block can be removed, which is conducive to separating the handle when needed and conveniently storing the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:
[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model of the high-voltage cabinet static contact live fastener;
[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the connecting column and the ball head of the live fastener of the static contact of the high-voltage cabinet of the utility model;
[0020] Figure 3 It is a schematic diagram of the second limit block connection structure of the live fastener of the static contact of the high-voltage cabinet of the utility model.
[0021] In the figure: 1, insulating rod; 2, sleeve; 3, connecting column; 31, through-hole; 311, rubber strip; 32, connecting rod; 321, bearing; 33, ball head; 4, handle; 41, first limit block; 42, thread; 43, second limit block; 431, screw groove. DETAILED DESCRIPTION
[0022] See also Figure 1-3 The utility model provides a technical solution: a live fastener for static contacts of a high-voltage cabinet, comprising an insulating rod 1 and a sleeve 2, wherein the sleeve 2 is fixed at the end of the insulating rod 1, and when the insulating rod 1 is driven to rotate, the sleeve 2 can be driven to rotate together, and a connecting column 3 is fixed to the other end of the insulating rod 1, and the connecting column 3 will rotate together with the insulating rod 1.
[0023] A through hole 31 is provided on the surface of the connecting column 3, and the through hole 31 passes through the connecting column 3, and a handle 4 is connected to the connecting column 3 through the through hole 31. The handle 4 cooperates with the connecting column 3 to utilize the lever principle to drive the connecting column 3 and the insulating rod 1 to rotate effortlessly, and drive the sleeve 2 to rotate, so as to tighten and lock the bolts of the static contact.
[0024] The cam 33 is provided with a plurality of rubber strips 311 on the inner surface of the through-hole 31 so that the cam 33 is not loosened and the cam 33 is not easily broken.
[0025] A first limit block 41 is fixed to one end of the handle 4, so that the handle 4 will not slip off from one side of the first limit block 41. A thread 42 is provided on the outer ring of the other end of the handle 4, and a second limit block 43 with a screw groove 431 inside is provided. The screw groove 431 cooperates with the thread 42 and is screwed on the outer ring of the other end of the handle 4, which can prevent the handle 4 from slipping off from one side of the second limit block 43. The first limit block 41 and the second limit block 43 have the same size. When the second limit block 43 is unscrewed, the handle 4 can also be pulled out from the through hole 31, which is convenient for stacking and storage when not in use.
[0026] When in use, the sleeve 2 is sleeved on the bolt that needs to tighten the static contact, and then the handle 4 drives the connecting column 3 to drive the insulating rod 1 and the sleeve 2 to rotate, so as to achieve the purpose of tightening the static contact bolt. When the internal space of the cabinet is small and it is inconvenient to operate or it is necessary to drive the insulating rod 1 to rotate more labor-saving, the handle 4 can be pulled to move to one side in the through-opening 31, thereby increasing the length of the power arm and preventing the end of the handle 4 from being blocked by the resistance of the cabinet. During this process, the other hand is held on the ball head 33 to support the connecting column 3, so as to prevent the sleeve 2 from slipping off the bolt when the handle 4 is pulled, and then the insulating rod 1 and the sleeve 2 are driven to rotate with less effort through the longer power arm to tighten the bolt of the static contact. During the tightening process, one hand is also held on the ball head 33 to support the connecting column 3, and the connecting rod 32 rotates with the insulating rod 1 and the connecting rod 32, and the ball head 33 and the connecting rod 32 rotate through the bearing 321, so as to prevent the sleeve 2 from slipping off the bolt when the insulating rod 1 and the sleeve 2 are rotated.
Claims
1. A live fastener for static contacts of a high-voltage cabinet, comprising an insulating rod (1) and a sleeve (2), characterized in that: The sleeve (2) is fixed to the end of the insulating rod (1), and a connecting column (3) is fixed to the other end of the insulating rod (1); The surface of the connecting column (3) is provided with a through hole (31), and the connecting column (3) is connected to a handle (4) through the through hole (31). A connecting rod (32) is fixed in the middle of the surface of the connecting column (3), and the connecting rod (32) is perpendicular to the surface of the connecting column (3). A ball head (33) is sleeved on the outer ring of the connecting rod (32), and the outer ring of the connecting rod (32) and the ball head (33) are rotatably connected via a bearing (321).
2. A high-voltage cabinet static contact live fastener according to claim 1, characterized in that: A first limit block (41) and a second limit block (43) are respectively fixed to both ends of the handle (4); the first limit block (41) and the second limit block (43) have the same size.
3. A live fastener for static contacts of a high-voltage cabinet according to claim 2, characterized in that: A screw groove (431) is provided inside the second limiting block (43), and the second limiting block (43) is screwed to the outer ring of the end of the handle (4) through the screw groove (431).
4. A high-voltage cabinet static contact live fastener according to claim 1, characterized in that: A rubber strip (311) is fixedly attached to the inner surface of the through opening (31), and a plurality of rubber strips (311) are evenly arranged.
5. The live fastener for static contacts of a high-voltage cabinet according to claim 3, characterized in that: The outer ring of the handle (4) at one end of the second limiting block (43) is provided with a thread (42), and the screw groove (431) is screwed to the outer ring of the end of the handle (4) through the thread (42).