Explosion-proof structure

Patent metadata

Field	Value
Publication number	US-11018485-B2
Application number	US-201916531081-A
Country	US
Kind code	B2
Filing date	Aug 4, 2019
Priority date	Aug 7, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

An explosion-proof structure includes a partition wall that partitions a sealed space in a container and wiring that connects the interior and the exterior of the sealed space. The partition wall includes a filling portion through which the wiring passes. The filling portion includes an inner peripheral wall surface that defines an opening having a central axis that passes through the partition wall, a filler that seals a gap between the inner peripheral wall surface and the wiring, a first peripheral groove provided on the inner peripheral wall surface and filled with the filler, and a second peripheral groove provided on the inner peripheral wall surface and filled with the filler. This explosion-proof structure is capable of improving the seal of the filling portion.

First claim

The invention claimed is:

1. An explosion-proof structure comprising:
a partition wall that partitions a sealed space in a container; and
wiring that connects an interior and an exterior of the sealed space;
wherein the partition wall comprises a filling portion through which the wiring passes; and
wherein the filling portion comprises
an inner peripheral wall surface that defines an opening having a central axis that passes through the partition wall;
a filler that seals a gap between the inner peripheral wall surface and the wiring;
a first peripheral groove provided on the inner peripheral wall surface and filled with the filler; and
a second peripheral groove provided on the inner peripheral wall surface and filled with the filler;

wherein the wiring comprises a through substrate formed by a substrate that passes through the filling portion;
wherein the wiring comprises an internal fixing member fixed to the container inside the sealed space; and
wherein an axial gap is provided between the through substrate and the internal fixing member to allow the through substrate and the internal fixing member to approach each other closely in an axial direction along the central axis.

2. The explosion-proof structure of claim 1 , wherein the through substrate comprises a sliding connector formed by a connector pinned slidably in the axial direction with respect to the internal fixing member.

3. The explosion-proof structure of claim 1 , wherein the wiring comprises an external fixing member fixed to the partition wall so as to cover the opening at an outside of the sealed space.

4. The explosion-proof structure of claim 1 , wherein the first peripheral groove and the second peripheral groove are disposed on either side of a center of the filler in an axial direction along the central axis.

5. The explosion-proof structure of claim 1 , wherein the filler is made of resin.

6. The explosion-proof structure of claim 1 , wherein the filling portion includes another filler that is adjacent to the filler and has a larger elasticity than the filler.

7. The explosion-proof structure of claim 1 , wherein the container is a flameproof enclosure.

Assignees

• Yokogawa Electric Corp

Inventors

• Goto Moe
• Hayashi Yuichi
• Okamoto Kazutoshi
• Huang Shuo
• Mimura Shinichi

Classifications

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H05K5/069

  Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft · CPC title

• H01B17/306

  by embedding in material other than glass or ceramics · CPC title

• H01B17/301

  Sealing of insulators to support · CPC title

• H02G3/088

  Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets · CPC title