Explosion-proof spiral exhaust pressure relief device for mine
View Patent ↗An explosion-proof spiral exhaust pressure relief device for mine is provided, relating to the technical field of explosion-proof pressure relief devices. A main structure of the explosion-proof spiral exhaust pressure relief device for mine includes an explosion-proof pressure relief housing and a first explosion-proof pressure relief inner core. An exhaust cavity is arranged inside the explosion-proof pressure relief housing in an axial direction. The exhaust cavity is open at one end of the explosion-proof pressure relief housing, and the other end of the explosion-proof pressure relief housing is provided with pressure relief holes communicating with the exhaust cavity. The first explosion-proof pressure relief inner core is arranged in the exhaust cavity. An outer wall of the first explosion-proof pressure relief inner core is provided with at least one explosion-proof spiral pressure relief channel.
1 . An explosion-proof spiral exhaust pressure relief device for mine, comprising an explosion-proof pressure relief housing, and a first explosion-proof pressure relief inner core,
wherein an exhaust cavity is arranged inside the explosion-proof pressure relief housing in an axial direction, the exhaust cavity is open at one end of the explosion-proof pressure relief housing, and another end of the explosion-proof pressure relief housing is provided with pressure relief holes communicating with the exhaust cavity;
the first explosion-proof pressure relief inner core is arranged in the exhaust cavity; and an outer wall of the first explosion-proof pressure relief inner core is provided with two first explosion-proof spiral pressure relief channels;
wherein at least one second explosion-proof pressure relief inner core is also arranged between the explosion proof pressure relief housing and the first explosion proof pressure relief inner core; each of the at least one second explosion-proof pressure relief inner core is of a rod-shaped structure, and an outer wall of each of the at least one second explosion-proof pressure relief inner core is provided with at least one second explosion proof spiral pressure relief channel; an accommodating cavity is arranged inside each of the at least one second explosion-proof pressure relief inner core;
wherein the at least one second explosion-proof pressure relief inner core comprises at least two second explosion-proof pressure relief inner cores, the accommodating cavity is configured for accommodating the first explosion-proof pressure relief inner core or a further one of the at least two second explosion-proof pressure relief inner cores; for every two adjacent second explosion-proof pressure relief inner cores of the at least two second explosion-proof pressure relief inner cores, a gap between an outer diameter of the at least one second explosion-proof spiral pressure relief channel on an outer wall of an inner one of the two adjacent second explosion-proof pressure relief inner cores and an inner diameter of an accommodating cavity of an outer one of the two adjacent second explosion-proof pressure relief inner cores is from 0.03 mm to 0.6 mm.
2 . The explosion-proof spiral exhaust pressure relief device for mine according to claim 1 , wherein one end, facing an inner bottom of the exhaust cavity, of the first explosion-proof pressure relief inner core is provided with a first circumferential pressure relief groove.
3 . The explosion-proof spiral exhaust pressure relief device for mine according to claim 1 , wherein one end, facing an inner bottom of the exhaust cavity, of each of the at least two second explosion-proof pressure relief inner core is provided with a second circumferential pressure relief groove, and the accommodating cavity communicates with the second circumferential pressure relief groove.
4 . The explosion-proof spiral exhaust pressure relief device for mine according to claim 1 , wherein a gap between an outer diameter of each of the two first explosion-proof spiral pressure relief channels on the outer wall of the first explosion-proof pressure relief inner core and an inner diameter of the accommodating cavity is from 0.03 mm to 0.6 mm.
5 . The explosion-proof spiral exhaust pressure relief device for mine according to claim 1 , wherein an end part and a side wall of the other end of the explosion-proof pressure relief housing are both provided with the pressure relief holes.
6 . The explosion-proof spiral exhaust pressure relief device for mine according to claim 1 , wherein an outer wall of the end of the explosion-proof pressure relief housing is provided with an external thread, and the external thread is configured to be connected to a flameproof cavity of a battery power supply.
7 . The explosion-proof spiral exhaust pressure relief device for mine according to claim 1 , wherein a length of each of the two first explosion-proof spiral pressure relief channels is not less than 25 mm.