Special tool for replacing contact finger of 110kV open-type disconnecting switch
By designing a special tool for replacing the contacts of 110kV open-type disconnectors and adopting the principle of two-way stretching with a screw drive, the problems of low efficiency and poor safety in contact finger replacement are solved, convenient and safe contact finger replacement is achieved, and the efficiency and safety of maintenance work are improved.
Patent Information
- Application Number
- CN202422736740.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-10
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-10
AI Technical Summary
The existing 110kV open-type disconnector contacts are prone to fatigue deformation in harsh environments, resulting in poor contact between the moving and static contacts, increased contact resistance, heat generation and other defects. In addition, the replacement process requires the cooperation of multiple people, which is inefficient and unsafe.
A special tool for replacing the contact fingers of a 110kV open-type disconnector has been designed. It adopts the principle of bidirectional tension driven by a screw drive. The driving rod drives the movable clamp to synchronously clamp the base of the contact fingers, overcomes the spring holding force, realizes the convenient disassembly and installation of the contact fingers, and uses the original screw holes to fix the contact fingers.
It improves the convenience, stability and safety of contact finger replacement, reduces labor costs, shortens working hours, ensures power transmission efficiency, avoids contact finger damage and spring bouncing injuries, and improves the refinement and safety of maintenance work.
Smart Images
Figure CN223451482U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of disconnecting switch especially relates to a 110kV open type disconnecting switch contact finger replacement special tool. BACKGROUND
[0002] The disconnecting switch is one of the most used electrical appliances in high-voltage switch electrical appliances, plays a crucial role in power transmission, can ensure the safe operation of the operating personnel in the maintenance work, and is crucial to the safe and stable operation of the power grid. At present, most of the disconnecting switches are located outdoors and are operated in harsh environments such as high voltage, high temperature, and humidity for a long time. The contact fingers are prone to fatigue deformation and even breakage, which cannot provide reliable stress, resulting in poor contact between the moving and static contacts, increased contact resistance, and thus defects such as heating. Therefore, regular replacement of the contact fingers can ensure the healthy and stable operation of the disconnecting switch.
[0003] At present, the 110kV open type disconnecting switch adopts a spring type structure, each phase is composed of 6 contact fingers, which are divided into left and right groups, and are fixed on both sides of the disconnecting switch base through compression springs and spring pins, are installed on the bearing seats at both ends of the base, and are connected by cross connecting rods and can be horizontally rotated. The replacement process of the contact fingers is divided into four stages: (1) disassemble the moving contact part and take the moving contact from the upper part of the disconnecting switch; (2) loosen the screws at the contact finger part, disassemble the spring, C-shaped plate and contact finger; (3) assemble new spring, C-shaped plate and contact finger; (4) stretch the root of the contact finger by stepping or pressing with hands, judge whether the width of the root of the contact finger reaches the width of the conducting arm, and assemble new contact finger and conducting arm when the width is appropriate, and restore the screws at each part. Since the new spring has large elastic force, the installation requires high personal strength. Generally, multiple maintenance personnel are needed to complete the work, and the work efficiency is very low. In addition, the installation process is prone to scratches and burrs on the contact finger, which affects the service life and reduces the operation reliability. SUMMARY
[0004] In order to solve the technical problems existing in the above-mentioned technology, in view of this, it is necessary to provide a 110kV open type disconnecting switch contact finger replacement special tool.
[0005] A 110kV open type disconnecting switch contact finger replacement special tool, comprising a bottom plate, a first movable clamp block, a second movable clamp block, and a driving rod;
[0006] The upper surface of the bottom plate is provided with two fixed plates facing each other, and a guide rod is arranged between the two fixed plates;
[0007] The first movable clamp block and the second movable clamp block are arranged between the two fixed plates and are slidably arranged on the guide rod;
[0008] The driving rod is rotatably arranged on two fixed plates, and the driving rod can drive the first movable clamping block and the second movable clamping block to move synchronously towards the middle of the driving rod or move away from the two ends of the driving rod.
[0009] Preferably, the driving rod is threadedly connected with the first movable clamping block and the second movable clamping block respectively, and the threadedly connecting mode of the first movable clamping block with the driving rod is opposite to the threadedly connecting mode of the second movable clamping block with the driving rod.
[0010] Preferably, the end of the driving rod is provided with a hand wheel.
[0011] Preferably, the first movable clamping block and the second movable clamping block are both provided with a clamping plate.
[0012] Preferably, the clamping plate is provided with a through hole.
[0013] Preferably, the inner wall of the clamping plate is provided with a groove for supporting a touch finger.
[0014] Preferably, the clamping plate is provided with a positioning hole on both sides of the through hole.
[0015] Preferably, the clamping plate is fixed on the first movable clamping block and the second movable clamping block by screws.
[0016] Preferably, the guide rod has two, and the two guide rods are symmetrically arranged on both sides of the driving rod.
[0017] Compared with the prior art, the special tool for replacing the 110kV open-type isolating switch contact finger provided by the utility model, through the driving rod driving the first movable clamping block and the second movable clamping block to move to the middle of the driving rod along the guide rod synchronously, the root of the extruded contact finger is squeezed, so that the contact finger root holding force caused by the spring is overcome, the old contact finger and the spring can be easily disassembled, and then the new contact finger piece and the spring are assembled; through rotating the driving rod, the driving rod drives the first movable clamping block and the second movable clamping block to move to the two ends of the driving rod along the guide rod synchronously, and then the contact finger root is stretched, when the width of the contact finger root reaches the width of the conducting arm, the conducting arm is assembled, the screws of each part are restored, and the contact finger replacement is completed. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be needed to introduce the drawings used in the embodiment description, obviously, the drawings in the following description are only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.
[0019] Figure 1 It is the structure schematic diagram when the utility model clamps contact finger.
[0020] Figure 2 It is the front view structure schematic diagram of the utility model. Figure 1
[0021] Figure 3 It is the top view structure schematic diagram of the utility model. Figure 1
[0022] Figure 4 It is the side view structure schematic diagram of the utility model. Figure 1
[0023] In the figure: base plate 01, first movable clamp block 02, second movable clamp block 03, drive rod 04, fixed plate 05, guide rod 06, hand wheel 07, clamp plate 08, through hole 81, recess 82, positioning hole 83, contact finger 09, spring 10. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0025] In the description of the present application, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and the like indicate the orientation or positional relationship, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0026] Please refer to Figures 1 to 4 The present application provides a kind of 110kV open type isolating switch contact finger replacement special tool, including base plate 01, first movable clamp block 02, second movable clamp block 03, drive rod 04;The upper surface of base plate 01 is provided with two fixed plates 05, and guide rod 06 is arranged between the two fixed plates 05. First movable clamp block 02, second movable clamp block 03 are oppositely arranged between the two fixed plates 05, and first movable clamp block 02, second movable clamp block 03 are slidably arranged on guide rod 06. Drive rod 04 is rotatably arranged on the two fixed plates 05, and drive rod 04 can drive first movable clamp block 02 and second movable clamp block 03 to be synchronized to the middle of drive rod 04 and be close to each other, or be separated to the two ends of drive rod 04.
[0027] The first movable clamping block 02 and the second movable clamping block 03 are driven by the driving rod 04 to move towards the middle of the driving rod 04 along the guide rod 06, so as to squeeze the root of the contact finger, overcome the contact finger root holding force caused by the spring, and easily disassemble the old contact finger and the spring, and then assemble the new contact finger piece and the spring; the driving rod 04 is rotated to drive the first movable clamping block 02 and the second movable clamping block 03 to move towards the two ends of the driving rod 04 along the guide rod 06, so as to stretch the contact finger root, and the conductive arm is assembled when the width of the contact finger root reaches the width of the conductive arm, and the screws of each part are restored, and the contact finger replacement is completed. In the use process, compared with the traditional manual replacement mode, the 110kV open-type disconnecting switch contact finger replacement special tool realizes the replacement of the contact finger while being more convenient, stable and safe in the operation process. The design of the 110kV open-type disconnecting switch contact finger replacement special tool is the first to use the screw rod transmission bidirectional stretching principle in the industry, and the original screw hole of the disconnecting switch contact finger is creatively used for contact finger fixing, so as to avoid damage to the silver plating layer of the contact finger in the replacement process, improve the fine degree of maintenance work, avoid the situation that the contact finger and the spring are bounced and injure the workers, improve the safety of the maintenance work, effectively reduce the number of workers participating in the contact finger replacement work in the whole replacement process, effectively save the labor cost, effectively promote the quality and efficiency of the maintenance work, effectively shorten the work time of the contact finger replacement, shorten the power-off maintenance time, ensure timely power supply, and improve the work efficiency.
[0028] In an embodiment, the driving rod 04 is threadedly connected with the first movable clamping block 02 and the second movable clamping block 03 respectively, and the threadedly connected manner of the first movable clamping block 02 and the driving rod 04 is opposite to the threadedly connected manner of the second movable clamping block 03 and the driving rod 04.
[0029] A hand wheel 07 is installed at the end of the driving rod 04 to facilitate the rotation of the driving rod 04 by the operator.
[0030] In an embodiment, the first movable clamping block 02 and the second movable clamping block 03 are both provided with a clamping plate 08.
[0031] Specifically, a through hole 81 is formed in the clamping plate 08. The through hole 81 can be directly opposite to the connecting screw of the contact finger and the spring, which is more convenient for disassembly and assembly in the replacement process.
[0032] The inner wall of the clamping plate 08 is provided with a groove 82 for supporting the contact finger. When the contact finger is clamped, the contact finger can be easily limited.
[0033] Specifically, positioning holes 83 are arranged on both sides of the through hole 81 on the clamp plate 08. When replacing the contact finger, the contact finger can be fixed on the clamp plate 08 by screwing a screw into the positioning hole 83, and the positioning hole 83 is just opposite to the screw hole of the contact finger, at this time, the contact finger can be assembled with the spring, after the assembly is completed, the driving rod 04 is operated to restore the clamp plate 08 to the initial position, and when the width of the root of the contact finger reaches the width of the conductive arm, the conductive arm is assembled, and the screws of each part are restored, and the replacement of the contact finger is completed.
[0034] In an embodiment, in order to facilitate the replacement and installation of the clamp plate 08, the clamp plate 08 is fixed on the first movable clamp block 02 and the second movable clamp block 03 by screws.
[0035] In an embodiment, the guide rod 06 has two, and the two guide rods 06 are symmetrically arranged on both sides of the driving rod 04.
[0036] When replacing the contact finger of the isolating switch, first, the contact finger is placed between the first movable clamp block 02 and the second movable clamp block 03, the driving rod 04 is driven to rotate circumferentially by operating the hand wheel 07, the first movable clamp block 02 and the second movable clamp block 03 are gathered to the middle of the driving rod 04 along the guide rod 06 by the driving rod 04, the clamp plate 08 is pressed against the contact finger to overcome the gripping force of the root of the contact finger caused by the spring, the screw connecting the contact finger and the spring at the through hole 81 is disassembled, and the old contact finger and the spring are easily disassembled and separated; the new contact finger piece is placed in the groove 82, the screw is screwed into the positioning hole 83 and the screw hole on the new contact finger piece, the new contact finger piece is fixed on the clamp plate 08, and then the new contact finger piece is assembled with the spring; the hand wheel 07 is shaken to drive the driving rod 04 to rotate circumferentially, the clamp plate 08 on the first movable clamp block 02 and the second movable clamp block 03 is moved to both ends of the driving rod 04 along the guide rod 06 by the driving rod 04, and the root of the contact finger is stretched, when the width of the root of the contact finger reaches the width of the conductive arm, the conductive arm is assembled, and then the screw for fixing the contact finger on the clamp plate 08 is removed, and the replacement of the contact finger is completed.
[0037] The above only discloses the preferred embodiment of the utility model, of course, cannot limit the scope of the utility model, and the person skilled in the art can understand that all or part of the processes of the above embodiment are implemented, and the equivalent changes made according to the utility model claim still belong to the range covered by the utility model.
Claims
1. A special tool for replacing the contact fingers of a 110kV open-type disconnector, characterized by: It includes a base plate, a first movable clamping block, a second movable clamping block, and a driving rod; Two fixing plates are arranged opposite to each other on the upper surface of the bottom plate, and a guide rod is arranged between the two fixing plates; The first movable clamping block and the second movable clamping block are oppositely arranged between the two fixed plates, and the first movable clamping block and the second movable clamping block are slidably arranged on the guide rod; The driving rod is rotatably arranged on the two fixed plates, and the driving rod can drive the first movable clamping block and the second movable clamping block to synchronously move toward the middle of the driving rod or to separate toward the two ends of the driving rod.
2. The special tool for replacing the contact fingers of a 110kV open-type disconnector according to claim 1 is characterized in that: The driving rod is threadedly connected to the first movable clamping block and the second movable clamping block respectively, and the threaded connection mode of the first movable clamping block and the driving rod is opposite to the threaded connection mode of the second movable clamping block and the driving rod.
3. The special tool for replacing the contact fingers of a 110kV open-type disconnector according to claim 2 is characterized in that: A hand wheel is installed at the end of the driving rod.
4. The special tool for replacing contact fingers of a 110kV open-type disconnector according to claim 1 or 2, characterized in that: The first movable clamping block and the second movable clamping block are both provided with clamping plates.
5. The special tool for replacing the contact fingers of a 110kV open-type disconnector according to claim 4 is characterized in that: The splint is provided with a through hole.
6. The special tool for replacing the contact fingers of a 110kV open-type disconnector according to claim 5, characterized in that: A groove for supporting the contact fingers is arranged on the inner wall of the clamping plate.
7. The special tool for replacing contact fingers of a 110kV open-type disconnector according to claim 6, characterized in that: Positioning holes are provided on both sides of the through hole on the clamping plate.
8. The special tool for replacing contact fingers of a 110kV open-type disconnector according to claim 4, characterized in that: The clamping plates are fixed to the first movable clamping block and the second movable clamping block respectively by screws.
9. The special tool for replacing contact fingers of a 110kV open-type disconnector according to claim 1, characterized in that: There are two guide rods, which are symmetrically arranged on both sides of the driving rod.