Sealing structure for an explosion-proof over-temperature and over-current protector

A sealing structure for an explosion-proof over-temperature and over-current protector, comprising an over-temperature and over-current protector, a cable electrically connected with the over-temperature and over-current protector, an explosion-proof pouring compound, a switch contact protective housing and an externally protective case, wherein the externally protective case is a relatively closed case which wraps up the explosion-proof pouring compound completely, and the externally protective case is provided with a cable hole having an inwardly rounded edge;

• wherein one end of the switch contact protective housing is open, and its other end is closed;
• the externally protective case is open at one end away from the cable hole, wherein an end cover is provided at the open end of the externally protective case;
• the switch contact protective housing is provided with a first pin hole, the externally protective case is provided with a second pin hole, and the end cover is provided with a third pin hole;
• during assembly, the first pin hole, the second pin hole and the third pin hole are aligned and a pin goes through said three pin holes to fix the housing, the case and the end cover.