Built-in water-blocking pin in middle connection part of all-insulated pipe bus

Abstract

The invention provides a built-in water-blocking pin in a middle connection part of an all-insulated pipe bus. The built-in water-blocking pin is arranged in a conductor tube of the middle connection part of the all-insulated pipe bus and particularly comprises a water-blocking pin body 1, airtight waterproof layers 3 and 6, water-blocking layers 4 and 5 and a boss 2, wherein the airtight waterproof layers 3 and 6 are made of rubber seal rings and are arranged in the grooves, close to two ends, of the water-blocking pin body 1 to form a first waterproof and moisture-proof layer; the water-blocking layers 4 and 5 are formed by winding water-blocking tapes and are located in the grooves close to the boss 2 to form a second waterproof and moisture-proof layer; when the first waterproof and moisture-proof layer is damaged and loses the protection effect, the water-blocking tapes quickly absorb water to expand, and seal a water vapor channel to form dual isolation and protection effects, in other words, the connection reliability of a middle joint is improved by improving the middle joint of the middle connection part of the all-insulated pipe bus and the waterproof and moisture-proof properties insulated from the outside of the middle joint; the external insulation environment of the middle joint is effectively improved; the insulating short-circuit breakdown accident of the middle connection part is reduced; the operation safety of the all-insulated pipe bus is improved; and the built-in water-blocking pin has the characteristics of being reasonable in structure, high in reliability, simple to install, long in service lifetime and the like.

Description

technical field [0001] The invention relates to a water-blocking pin, in particular to a water-blocking pin built in the middle connection of a fully insulated pipe bus with a sealed waterproof layer and a water-blocking layer, in which the intermediate connection part is placed in a conductor pipe. Background technique [0002] Fully insulated pipe busbar, because its conductor pipe is a hard conductor and limited by production and processing technology, the general length is 4m~6m; when the actual application length exceeds 4m~6m, it will be connected by intermediate joints; in actual application, The intermediate joints are all hoop-type connections. In order to ensure the tightness of the connection, a certain gap needs to be left at the tightened and closed place; this gap communicates with the gap at the end of the fully insulated pipe busbar conductor pipe in the docking state. Therefore, The inner space of the conductor pipe, the gap at the butt joint end, and the ga...

AI Technical Summary

Problems solved by technology

[0004] First, the waterproof glue is wound on site. On the outer surface of the insulating outer sheath, the stretching length, tightness and quality of the waterproof glue during water, moisture, dust and winding have a great influence on the waterproof effect. Once any link If there is a problem, it will lose the waterproof effect and cause a short circuit accident;

[0005] Second, the intermediate joint is operated in a humid environment for a long time, and its locking bolts are prone to rust, which affects the reliability of the connection;

[0006] Third, sealing water and moisture in the insulating layer will easily cause the insulation to be damp and cause insulation breakdown accidents. It is not suitable for dry-type fully insulated pipe busbars

Images