CN-224229347-U - Down-pressure sealing type explosion-proof valve

Abstract

The utility model relates to a down-pressing sealing type explosion-proof valve which is characterized by comprising a valve body and a valve seat, wherein the valve body and the valve seat are correspondingly contacted to form an exhaust channel, at least one exhaust hole is formed in the valve seat and used for communicating a battery pack with the exhaust channel, a movable assembly is arranged on the valve body and is fixed with the valve body, a flat sealing ring is arranged in the valve seat, the cross section of the flat sealing ring is square, the outer side of the flat sealing ring is abutted against the inner wall of the valve seat, one end of the flat sealing ring is attached to the valve seat, the valve body is tightly pressed on the flat sealing ring to seal the exhaust hole in an initial state of the movable assembly, and the flat sealing ring does not need to be installed by adopting specific pressure mechanical equipment relative to the sealing ring with a circular cross section, so that the installation efficiency is high and the cost is low.

Inventors

• CUI MULIN

Assignees

• 惠州市曙阳科技有限公司

Dates

Publication Date

20260512

Application Date

20250626

Claims (8)

1. 1. A down-pressing sealing type explosion-proof valve is characterized by comprising a valve body and a valve seat, wherein the valve body and the valve seat are correspondingly contacted to form an exhaust channel, at least one exhaust hole is formed in the valve seat and used for communicating a battery pack and the exhaust channel, a movable assembly is arranged on the valve body and fixed with the valve body, a flat sealing ring is arranged in the valve seat, the cross section of the flat sealing ring is square, the outer side of the flat sealing ring is abutted to the inner wall of the valve seat, one end of the flat sealing ring is attached to the valve seat, and the valve body is tightly pressed on the flat sealing ring to seal the exhaust hole when the movable assembly is in an initial state.
2. 2. The down-pressure sealing type explosion-proof valve according to claim 1, wherein the valve body comprises a valve cover and a connecting seat, a mounting cavity is formed in the valve cover, the connecting seat is arranged in the mounting cavity, the connecting seat is fixed with the movable assembly, and the valve cover is pressed on a flat sealing ring to seal the exhaust hole when the movable assembly is in an initial state.
3. 3. A down-pressure sealing type explosion-proof valve according to claim 2, wherein a down-pressure convex ring is arranged on one side of the valve cover facing the valve seat, and the down-pressure convex ring is pressed on the flat sealing ring to seal the exhaust hole when the movable assembly is in an initial state.
4. 4. The down-pressure sealing type explosion-proof valve according to claim 1, wherein an embedding groove is formed in the side wall of the valve seat, and the outer end of the flat sealing ring is embedded in the embedding groove.
5. 5. The down-pressure sealing type explosion-proof valve according to claim 1, wherein the movable assembly comprises a connecting rod and an elastic piece, one end of the connecting rod is fixed with the valve body, one end of the elastic piece is abutted against the valve seat, the other end of the elastic piece is arranged on the connecting rod, and in an initial state of the elastic piece, the connecting rod pulls the valve body to be pressed on a flat sealing ring to seal the exhaust hole.
6. 6. A down-pressure sealed explosion-proof valve according to claim 1, wherein an outer seal ring is provided on the valve seat at an end opposite the valve body.
7. 7. A pressure-down sealed explosion-proof valve according to claim 1, wherein an external thread is provided on the valve seat at an end opposite to the valve body, the external thread being for threaded connection with a battery pack.
8. 8. The down-pressure sealing explosion-proof valve according to claim 7, wherein a clamping nut matched with the external thread is arranged on the valve seat, and the clamping nut is in threaded connection with the external thread.

Description

Down-pressure sealing type explosion-proof valve Technical Field The utility model relates to the technical field of explosion-proof valves, in particular to a down-pressing sealing type explosion-proof valve. Background The explosion-proof valve is an important valve, is widely applied to equipment which needs waterproof, ventilation and pressure relief in the industries of petrochemical industry, metallurgy, electric power, gas, automobiles and the like, and is usually arranged on a shell of the equipment. The explosion-proof valve has the core functions of preventing liquid and pollutants from invading, allowing gas molecules to pass through so as to balance pressure, and rapidly relieving pressure when the internal pressure of equipment or a system exceeds a safety threshold value to prevent explosion. Taking a battery as an example, in the use process of the battery, gas may be generated by internal chemical reaction, so that the internal pressure of the battery pack is increased sharply, and when the internal pressure exceeds a preset safety value, the valve of the explosion-proof valve arranged on the battery pack is opened rapidly to release the internal pressure, so that the explosion is avoided, and the safety of the battery pack, an automobile and personnel is protected. Most of the existing explosion-proof valves adopt spring control switches, when the air pressure in the equipment is larger than the yield strength of the springs, the springs are compressed, so that the valve is opened to realize air discharge and pressure relief, the valve body of the explosion-proof valve is made of metal materials, the springs are arranged in the middle of the valve body, a bracket structure for connecting the springs and an opening and closing structure is required to be processed in the middle of the valve body, for example, the explosion-proof valve disclosed in patent No. CN216590228U can be pushed to open the valve by the air pressure in the battery pack after the pressure in the battery pack exceeds a preset safety value. The section of the inner sealing ring in the explosion-proof valve is circular, and when the explosion-proof valve is assembled, in order to avoid the deviation of the inner sealing ring on the valve body, the inner sealing ring needs to be pressed into the sealing groove of the valve body, and special pressure mechanical equipment needs to be adopted for extruding the inner sealing ring. Disclosure of utility model Aiming at the defects of the prior art, the utility model aims to provide the down-pressing sealing type explosion-proof valve, which is characterized in that a flat sealing ring is arranged to replace a round sealing ring, so that the flat sealing ring is not required to be installed by adopting specific pressure mechanical equipment, the installation efficiency is higher, and the cost is lower. The technical aim of the utility model is achieved through the following technical scheme that the lower-pressure sealing type explosion-proof valve comprises a valve body and a valve seat, wherein the valve body and the valve seat are correspondingly contacted to form an exhaust channel, at least one exhaust hole is formed in the valve seat and used for communicating a battery pack and the exhaust channel, a movable assembly is arranged on the valve body and is fixed with the valve body, a flat sealing ring is arranged in the valve seat, the section of the flat sealing ring is square, the outer side of the flat sealing ring is abutted against the inner wall of the valve seat, one end of the flat sealing ring is abutted against the valve seat, and the valve body is tightly pressed on the flat sealing ring to seal the exhaust hole in an initial state of the movable assembly. Specifically, when the flat seal ring is assembled in the valve seat, the bottom of the flat seal ring is attached to the inner wall of the valve seat, and the outer side of the flat seal ring is abutted to the inner wall of the valve seat, so that the flat seal ring is difficult to slide in the valve seat, a seal groove is not required to be arranged in the valve seat, the flat seal ring is pressed into the seal groove, and only the flat seal ring is required to be stably placed in the valve seat and is positioned at the outer side of the exhaust hole, so that the flat seal ring can be installed. Compared with a sealing ring with a circular cross section, the flat sealing ring does not need to be installed by adopting specific pressure mechanical equipment, and has higher installation efficiency and lower cost. When the movable assembly is in an initial state, the movable assembly pulls the valve body to press one side of the valve body, which is opposite to the valve seat, to the flat sealing ring, and at the moment, the vent hole is sealed by the valve body and the flat sealing ring to open, so that the battery pack is isolated from the outside. After the air pressure in the battery pack exceeds a preset safe