Wiring cable connection structure of pole-mounted vacuum circuit breaker
By using laser welding and a multi-layer sealing structure at the connection point of the pole-mounted vacuum circuit breaker's wiring cable, the electrochemical corrosion and heat generation problems caused by copper-aluminum lap joints are solved, achieving stable connection and waterproof and moisture-proof effects for the wiring cable, thus improving the operational reliability of the equipment.
Patent Information
- Application Number
- CN202423278692.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Pole-mounted vacuum circuit breakers are prone to electrochemical corrosion and overheating at the copper-aluminum lap joint, leading to joint failure, and the wiring cables are susceptible to oxidation and damage due to moisture.
The cable is sealed using a laser-welded layer structure, including a silicone sleeve, a sealing cap, a cold shrink tubing, and multiple sealing layers (self-adhesive tape layer and heat shrink tubing) to ensure a secure connection and prevent water and moisture damage.
It increases the current carrying capacity of the wiring cable, reduces temperature rise, enhances waterproof protection, avoids corrosion and overheating problems of copper-aluminum lap joints, and ensures the stable operation of the pole-mounted vacuum circuit breaker.
Smart Images
Figure CN223665669U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to high -voltage power distribution technical field more specifically refers to a kind of wiring cable connection structure of pole-mounted vacuum circuit breaker. BACKGROUND
[0002] The conductor of wiring cable used in the line of power distribution network frame is basically aluminum stranded wire, and the wiring seat used in pole-mounted vacuum circuit breaker equipment is basically copper material. When the circuit breaker is connected to the line of power grid through wiring cable, there is a problem of copper-aluminum lap joint. If copper and aluminum are connected together by simple mechanical method, electrochemical corrosion is easy to occur in humid medium due to the large difference between the electrode potentials of the two. When copper wire and aluminum wire pass through current, they will heat up, but their resistivities are different. When passing through current, the heat generated by aluminum wire is larger than that of copper wire, so it is easy to have a fault point at the joint. At the same time, the compression of the wiring cable at the other end will have a section of core exposed outside, and water vapor entering will cause water vapor to accumulate in the cable, making the cable more prone to oxidation damage. SUMMARY
[0003] The utility model aims at providing a wiring cable connection structure of pole-mounted vacuum circuit breaker to solve the above-mentioned defects of the prior art.
[0004] The utility model adopts the following technical scheme:
[0005] A wiring cable connection structure of pole-mounted vacuum circuit breaker, comprising a wiring cable composed of a core and a cladding, the core of one end of the wiring cable is compressed in a wiring post of the pole-mounted vacuum circuit breaker, a laser welding layer is provided on the compression part of the core and the wiring post, the core of the other end of the wiring cable is fixedly connected with a wire nose, and a plurality of sealing layers are provided between the core and the cladding of the other end of the wiring cable and the wire nose.
[0006] Further, the core and the cladding of one end of the wiring cable are sequentially sleeved with a silica gel sleeve, a sealing screw cap and a cold shrink tube from inside to outside on the wiring post.
[0007] Further, the plurality of sealing layers are double-layer sealing layers, which are sequentially composed of a self-adhesive tape layer and a heat shrink tube from inside to outside.
[0008] Further, the self-adhesive tape layer is arranged between the core and the cladding of the other end of the wiring cable and the wire nose, the heat shrink tube is sleeved on the self-adhesive tape layer, and the two ends of the heat shrink tube respectively extend to the wire nose and the cladding of the wiring cable.
[0009] Preferably, the self-adhesive tape layer is composed of an insulating self-adhesive tape.
[0010] As can be seen from the above description of the structure of the utility model, compared with the prior art, the utility model has the following advantages:
[0011] 1. The utility model discloses a wiring cable connecting structure of pole vacuum circuit breaker, the wiring cable and the wiring post of pole vacuum circuit breaker adopt the crimping, and then the laser welding layer is additionally arranged on the crimping place, so that the loop resistance on the wiring post is smaller, the carrying capacity is improved, the temperature rise change is reduced, and the connection is stable and reliable. Meanwhile, the multi-layer sealing layer structure is further provided between the other end of the wiring cable and the wire nose, so that the waterproof and protection effect of the wiring cable is greatly improved, the line fault caused by the problems such as moisture, poor contact heating and chemical reaction corrosion of copper-aluminum lap joint in outdoor environment is solved, and the long-term stable operation of the pole vacuum circuit breaker is ensured.
[0012] 2. The utility model discloses a multi-layer sealing layer structure preferably comprises a double-layer sealing layer of self-adhesive tape layer and heat shrink tube, the exposed wire core is shielded and sealed by winding the insulation self-adhesive tape between the wiring cable cladding and the wire nose first, and then the heat shrink tube is sleeved, so that the waterproof, moisture-proof and protection effect of the connection between the wire nose and the wiring cable is greatly improved, and the structure is simple and the process is convenient. ACCURACY OF DRAWINGS
[0013] Figure 1 It is the front view of the utility model.
[0014] Figure 2 It is the front view when the wire core is inserted into the wire nose.
[0015] Figure 3 It is Figure 2 the front view after winding the self-adhesive tape layer between the wire core and the wire nose.
[0016] Figure 4 It is Figure 3 the front view after sleeving the heat shrink tube between the wire core and the wire nose.
[0017] Figure 5 It is the front view after crimping and laser welding of the wiring cable and the wiring post.
[0018] Figure 6 It is Figure 5 the front view after sleeving the silica gel sleeve.
[0019] Figure 7 It is Figure 6 the front view after screwing the sealing screw cap.
[0020] Figure 8 It is Figure 7 the front view after sleeving the cold shrink tube.
[0021] In the drawing, the reference signs are as follows: pole vacuum circuit breaker 10, wiring post 11, wiring cable 20, wire core 21, wire nose 30, silica gel sleeve 41, sealing screw cap 42, cold shrink tube 43, self-adhesive tape layer 51 and heat shrink tube 52. DETAILED DESCRIPTION
[0022] The specific embodiments of the present application will be described below with reference to the accompanying drawings.
[0023] Referring to Figure 1 A wiring cable connection structure of a pole-mounted vacuum circuit breaker, comprising a wiring cable 20 composed of a core 21 and a cladding layer (not shown in the figure). In the embodiment, the pole-mounted vacuum circuit breaker 10 has three wiring posts 11, and the wiring cable 20 has three corresponding wiring cables. The core 21 of the wiring cable 20 is preferably an aluminum stranded wire. The cladding layer of the two ends of the wiring cable 20 is stripped to expose the core 21. One end of the core 21 of the wiring cable 20 is crimped in the wiring post 11 of the pole-mounted vacuum circuit breaker 10. A laser welding layer (not shown in the figure) is provided on the crimping position of the core 21 and the wiring post 11. A silica gel sleeve 41, a sealing screw cap 42, and a cold shrink tube 43 are sequentially sleeved on the crimping position and the laser welding layer from the inside to the outside. In the embodiment, the laser welding layer is made by using the existing laser welding process. The other end of the core 21 of the wiring cable 20 is fixedly connected to a wire nose 30. A plurality of sealing layers are provided between the other end of the core 21 and the cladding layer of the wiring cable 20 and the wire nose 30.
[0024] Specifically, referring to Figures 5 to 8 Before the one end of the core 21 of the wiring cable 20 is crimped with the wiring post 11, the dirt, oil stains and other impurities on the crimping position are cleaned, and then the core 21 is inserted into the crimping post and crimped with the wiring post 11 by screwing. Subsequently, the laser welding layer is welded on the crimping position by laser welding. Then, the silica gel sleeve 41 is used to seal and protect the crimping position and the laser welding layer, and the conical sealing screw cap 42 is sleeved on the silica gel sleeve 41 in a threaded manner to form a second level of sealing and protection. Finally, a longer cold shrink tube 43 is used for third level of sealing and protection, thereby realizing multi-level sealing and protection of the connection between the wiring post 11 and the wiring cable 20.
[0025] Referring to Figures 2 to 4 In the embodiment, the plurality of sealing layers between the other end of the core 21 of the wiring cable 20 and the wire nose 30 are preferably double-layer sealing layers. The double-layer sealing layers are sequentially composed of a self-adhesive tape layer 51 and a heat shrink tube 52 from the inside to the outside. The self-adhesive tape layer 51 is arranged between the one end of the core 21 and the cladding layer of the wiring cable 20 and the wire nose 30. The heat shrink tube 52 is sleeved on the self-adhesive tape layer 51, and the two ends of the heat shrink tube 52 extend to the cladding layer of the wiring cable 20 and the wire nose 30, respectively.
[0026] Specifically, referring to Figure 2 and Figure 3, the self-adhesive tape layer 51 is composed of an insulating self-adhesive tape winding, the core 21 of the other end of the wiring cable 20 is crimped and fixed with the wire nose 30, at this time, due to the influence of process factors, a small part of the core 21 is exposed between the cladding of the wiring cable 20 and the wire nose 30. Subsequently, the exposed core 21 is wound with the insulating self-adhesive tape to form a first sealing layer of the double-layer sealing structure, the self-adhesive tape layer 51. Then, referring to Figure 4 the wire nose 30, the self-adhesive tape layer 51 and the cladding of the wiring cable 20 are sleeved with the heat shrink tube 52 to form a second sealing layer, thereby realizing better waterproof and protection effects.
[0027] The above is only a specific embodiment of the present application, but the design concept of the present application is not limited thereto, and any non-substantial change of the present application by using the concept shall belong to the act of infringing the protection scope of the present application.
Claims
1. A wiring cable connection structure of a pole-mounted vacuum circuit breaker, comprising a wiring cable composed of a core and a cladding, characterized by: One end of the wire core of the connecting cable is crimped in a terminal post of the post-type vacuum circuit breaker, a laser welding layer is arranged on the crimping position of the terminal post and the one end of the wire core, the other end of the wire core of the connecting cable is fixedly connected with a wire nose, and a plurality of sealing layers are arranged between the other end of the wire core of the connecting cable and the wire nose and the wire nose.
2. A connection structure of a wiring cable of a pole vacuum circuit breaker according to claim 1, characterized in that: The wire core and the cladding of one end of the connecting cable are sleeved with a silica gel sleeve, a sealing screw cap and a cold shrink tube from inside to outside on the terminal post.
3. A connection structure of a wiring cable of a pole vacuum circuit breaker according to claim 1, characterized in that: The plurality of sealing layers are double sealing layers, which are sequentially composed of a self-adhesive tape layer and a heat shrink tube from inside to outside.
4. A pole mounted vacuum circuit breaker according to claim 3, wherein: The self-adhesive tape layer is arranged between the other end of the wire core of the connecting cable and the wire nose, the heat shrink tube is sleeved on the self-adhesive tape layer, and the two ends of the heat shrink tube respectively extend to the wire nose and the cladding of the connecting cable.
5. A pole mounted vacuum circuit breaker according to claim 4, wherein: The self-adhesive tape layer is composed of an insulating self-adhesive tape.