一种防爆接线箱
By optimizing the structural parameters of the explosion-proof threaded joint surface and the flameproof joint surface, and combining the explosion-proof plug with the PTFE gasket, along with the built-in nut and guide rail, the explosion-proof performance of the explosion-proof junction box is improved, preventing explosion propagation and gas intrusion, and enhancing safety and sealing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHECHUANG ZHONGHE EXPLOSION-PROOF TECH CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing explosion-proof junction boxes have not further optimized parameters such as the pitch, minimum number of engaged threads, and minimum engagement axial length of the explosion-proof threaded joint surface between the housing and the cover, resulting in a need to improve explosion-proof performance.
The pitch, minimum number of engaged threads, and minimum engagement axial length of the explosion-proof threaded mating surface are optimized, and the width of the explosion-proof mating surface and the width from the bolt hole to the inner edge of the mating surface, as well as the maximum allowable clearance, are enhanced. A combination structure of explosion-proof plugs and PTFE gaskets is adopted, with built-in nuts, spring washers, and guide rails to improve connection stability.
The explosion-proof performance of the explosion-proof junction box has been improved, preventing the spread of explosions and gas intrusion, and enhancing safety and sealing performance.
Smart Images
Figure CN224520596U_ABST
Abstract
Claims
1. An explosion-proof terminal box characterized by comprising: Including the explosion-proof enclosure, it also includes: Multiple explosion-proof plugs and multiple PTFE gaskets, the explosion-proof plugs are simultaneously connected to the PTFE gaskets and the explosion-proof housing, the explosion-proof plugs and the PTFE gaskets have an explosion-proof threaded engagement surface, the pitch of the explosion-proof threaded engagement surface is not less than 0.7 mm, the minimum number of engagement threads of the explosion-proof threaded engagement surface is not less than 5, and the minimum engagement axial length of the explosion-proof threaded engagement surface is not less than 8 mm. The explosion-proof enclosure has an explosion-proof mating surface. The width of the explosion-proof mating surface is not less than 25 mm, the distance from the bolt hole to the inner edge of the mating surface is greater than 9 mm, and the maximum allowable gap between the explosion-proof mating surfaces is not greater than 0.2 mm.
2. The explosion-proof junction box of claim 1, wherein, The explosion-proof housing contains nuts, spring washers, flat washers, terminals, and guide rails. The guide rails are connected to the explosion-proof housing via nuts, spring washers, and flat washers, and the terminals are connected to the guide rails via combination screws.
3. The explosion-proof junction box of claim 1, wherein, The explosion-proof enclosure is equipped with nuts, spring washers, flat washers and contact plates. The contact plates are connected to the explosion-proof enclosure via nuts, spring washers and flat washers.
4. The explosion-proof junction box of claim 1, wherein, The explosion-proof enclosure has rivets and a nameplate on its exterior, with the nameplate attached to the explosion-proof enclosure by rivets.
5. The explosion-proof junction box of claim 4, wherein, The bottom width of the rivet hole between the explosion-proof housing and the nameplate shall not be less than 3 mm.