Explosion-proof switch isolation contact seat
By setting epoxy resin in the inner cavity of the air-insulated switch equipment and setting up installation holes on the conductor, the problems of insufficient insulation and inconvenient installation of the conductor are solved, and the effect of high insulation level, simplifying installation and improving service life is achieved.
Patent Information
- Application Number
- CN202421242646.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-06-03
AI Technical Summary
In the medium-voltage ring power supply system, existing air-insulated switch equipment has problems such as insufficient insulation between the conductors, inconvenient installation, large assembly errors, and large external influences of the electrical performance of exposed conductors, resulting in large width of the switch cabinet and small insulation safety margin.
An explosion-proof switch isolation contact holder is designed. By installing epoxy resin in the inner cavity of the conductor and installing holes on the front and rear sides of the conductor, barrier insulation between the ground and the phase is achieved, simplifying the installation process and improving insulation performance.
It improves the insulation level, simplifies the installation process, reduces contact resistance, improves the service life and interchangeability of the product, and meets the requirements of miniaturization and explosion-proof switch cabinets.
Smart Images
Figure CN222980381U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of isolating contact seats, in particular to an explosion-proof switch isolating contact seat. Background Technique
[0002] In medium-voltage distribution networks, the external insulation media of ring main unit switchgear mainly include air insulation, gas insulation, and solid insulation.
[0003] As the cheapest insulation medium, air insulation has been widely used. Its switches are simple to manufacture, low in cost, convenient to maintain, and simple to operate. It is widely used in medium-voltage ring main unit power supply systems.
[0004] The main circuit of air-insulated switchgear includes incoming and outgoing line bushings, bus-side expansion sockets, solid-sealed poles, isolating earthing switches, isolating contact seats, etc.
[0005] The isolating contact seat designed and developed in this solution is used to fix the isolating earthing switch circuit of the switch, providing ground insulation and phase insulation for the isolating circuit.
[0006] Explosion-proof switches are used in flammable and explosive places, such as chemical industries. They can isolate the electric sparks inside the switch from contacting external flammable and explosive substances, and at the same time prevent secondary explosions when faults occur inside the switch, reaching the explosion-proof level. The design of this isolating contact seat meets the explosion-proof requirements while meeting the performance requirements of the switch itself.
[0007] Main defects of the traditional solution:
[0008] 1. The conductor has no phase barrier insulation, the phase distance is large, and the height from the ground is high, resulting in a large width of the switch cabinet.
[0009] 2. The conductor is fixed by insulators, which is inconvenient for installation and has a large assembly error.
[0010] 3. The electrical performance of the bare conductor is greatly affected by the outside world, and the insulation safety margin between phases and to the ground is small (at the same distance).
[0011] Therefore, we propose an explosion-proof switch isolating contact seat to solve the problems mentioned above. Content of the Utility Model
[0012] The purpose of the utility model is to provide an explosion-proof switch isolating contact seat to solve the problems raised in the above background technique.
[0013] To achieve the above purpose, the utility model provides the following technical solution: an explosion-proof switch isolating contact seat, including a conductor, wherein epoxy resin is arranged in the inner cavity of the conductor, and mounting holes are respectively opened at the front and rear sides of the conductor.
[0014] Preferably, the mounting holes are symmetrically arranged before and after with the center of the conductor as the axis.
[0015] Preferably, the epoxy resin can play a role in insulating support.
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0017] 1. The insulator support epoxy resin and the conductor are combined together. There are epoxy resin baffles for the high-voltage part of the conductor to the ground and between phases, improving the insulation level.
[0018] 2. The isolating contact seat only needs to be fixed at two installation positions, which is convenient and simple to install. The mounting holes have a certain adjustment margin to correct the cumulative error of the switch metal cabinet body. Due to the use of the epoxy resin automatic pressure gel molding process (APG), there is sufficient mechanical strength. The dimensional accuracy of the product is improved by accurate dimensional control of the mold, which is beneficial to the cooperation with the switch cabinet frame, reduces the contact resistance, and improves the interchangeability. In the whole scheme, it is equivalent to the original structure having good electrical performance, complete functions, convenient installation, and high reliability.
[0019] 3. During production, the partial discharge amount of the high-voltage conductor to the ground (installation surface) is controlled, the electrical aging of the insulator is reduced, and the service life of the product is greatly improved.
[0020] 4. The rated voltage of this isolating contact seat is 12 kV, and the current values of 630 A and 1250 A meet the needs of ring network power supply in cities, factories, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a perspective view of the present utility model;
[0022] Figure 2 is an overall perspective view of the present utility model;
[0023] Figure 3 is a top view of the present utility model;
[0024] Figure 4 is a side view of the present utility model.
[0025] In the figure: 1. Conductor; 2. Mounting hole; 3. Epoxy resin. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0027] Please refer to Figures 1-4 , an explosion-proof switch isolating contact seat, including a conductor 1, an epoxy resin 3 is arranged in the inner cavity of the conductor 1, and mounting holes 2 are respectively opened at the front and rear sides of the conductor 1.
[0028] The mounting holes 2 are symmetrically arranged front and rear with the center of the conductor 1 as the axis.
[0029] The epoxy resin 3 can play a role in insulating support.
[0030] Working principle: The insulating body is fixed on the switch frame through the mounting holes 2 to form an insulating and fixed support for the ground. One end of the conductor 1 is connected to the moving end of the solid-sealed pole vacuum interrupter through a flexible connection, and the other end of the conductor 1 is connected to the isolating switch to form a complete conduction and isolation loop.
[0031] Since there are epoxy resin baffles between the conductive loop and the ground and between phases, providing barrier insulation, the insulation level is improved, so as to achieve the purpose of miniaturization of the switchgear and at the same time meet the requirements of switch explosion protection.
[0032] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.
[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. An explosion-proof switch isolation contact seat, comprising a conductor (1), characterized in that: An epoxy resin (3) is arranged in the inner cavity of the conductor (1), and mounting holes (2) are respectively opened at the front and rear sides of the conductor (1); The mounting holes (2) are arranged symmetrically front to back with the center of the conductor (1) as the axis; The epoxy resin (3) can play a role of insulating support.