Highly waterproof small anti-explosion valve

Abstract

The utility model discloses a highly waterproof small explosion-proof valve, which comprises a valve cover, a valve body and a waterproof breathable membrane component, a pressure relief channel is arranged in the valve body, and the waterproof breathable membrane component is positioned in the valve body and covers the pressure relief channel; the waterproof breathable film assembly comprises a waterproof breathable film and a waterproof elastic film used for blasting. The waterproof breathable film is annularly arranged on the periphery of the elastic film; the elastic modulus of the elastic film is smaller than that of the waterproof breathable film; the ratio of the effective area of the waterproof breathable film to the effective area of the elastic film is 0.2-0.9; the anti-explosion valve further comprises a supporting piece used for supporting the waterproof breathable film assembly, the supporting piece is located below the elastic film in the axial direction, and therefore the water pressure resistance of the waterproof breathable film assembly is improved. According to the anti-explosion valve, under the condition that the total area of the waterproof and breathable film assembly is reduced, it can be guaranteed that the waterproof and breathable performance of the whole waterproof and breathable valve is basically unchanged, and miniaturization and water pressure resistance are both considered.

Claims

1. A small explosion-proof valve with high waterproofness, characterized in that: It comprises a valve cover, a valve body and a waterproof breathable membrane assembly, wherein the valve body is provided with a pressure relief passage, and the waterproof breathable membrane assembly is located in the valve body and covers the pressure relief passage; The waterproof breathable membrane assembly comprises a waterproof breathable membrane and a waterproof elastic membrane for blasting; The waterproof and breathable membrane is arranged around the outer periphery of the elastic membrane; The elastic modulus of the elastic film is smaller than the elastic modulus of the waterproof breathable film; The ratio of the effective area of ​​the waterproof breathable membrane to the effective area of ​​the elastic membrane is 0.2-0.9; It also includes a support member for supporting the waterproof breathable membrane assembly, and the support member is located axially below the elastic membrane.

2. The explosion-proof valve according to claim 1, characterized in that: The elastic membrane is provided with a bonding piece, which is located at the outer peripheral edge of the elastic membrane and is an annular structure; The ratio of the ring width of the bonding member to the effective radius of the elastic film is 0.05-0.4; and / or the ring width of the bonding member is 0.5-5 mm.

3. The explosion-proof valve according to claim 2, characterized in that: The ratio of the ring width of the bonding member to the effective radius of the elastic film is 0.1-0.3; and / or the ring width of the bonding member is 1-4 mm.

4. The explosion-proof valve according to claim 1, characterized in that: A limiter for limiting the movement of the elastic membrane is arranged in the valve body, and the limiter is fixedly connected to the valve body; the limiter is an annular structure and is located axially above the outer peripheral edge of the elastic membrane; the ring width of the limiter is smaller than the ring width of the bonding member.

5. The explosion-proof valve according to claim 4, characterized in that: The waterproof breathable membrane assembly also includes a protective member for protecting the elastic membrane, the protective member is located between the limiting member and the elastic membrane, the protective member is connected to the outer peripheral edge of the elastic membrane, the protective member is an annular structure, and the ring width of the protective member is not less than the ring width of the limiting member.

6. The explosion-proof valve according to claim 1, characterized in that: The support member and the waterproof breathable membrane are spaced apart; the axial distance between the support member and the waterproof breathable membrane is 20-200 μm; The thickness of the support member is 50-200 μm; the support member is a porous structure with an average pore size of 0.2-0.4 μm.

7. The explosion-proof valve according to claim 1, characterized in that: The valve body is provided with a support structure for installing and supporting the waterproof breathable membrane assembly and the support member, and the support structure includes a first fixing platform, which is an annular structure and is located axially below the support member, and the ring width of the first fixing platform is not less than the ring width of the adhesive member.

8. The explosion-proof valve according to claim 7, characterized in that: The support structure further includes at least one second fixing platform, which is an annular structure and connected to the first fixing platform; the second fixing platform is located axially below the support member and corresponds to the central area of ​​the elastic membrane; and / or A plurality of the second fixing platforms are concentrically arranged, and a radius of the largest of the second fixing platforms is smaller than a radius of the elastic membrane.

9. The explosion-proof valve according to claim 1, characterized in that: The deformation coefficient of the elastic film is (5-30)×10 -3 mm / kpa / mm 2 ; The thickness of the elastic film is 0.05-0.2 mm, and the effective area of ​​the elastic film is 250-750 mm 2 .

10. The explosion-proof valve according to claim 1, characterized in that: A plurality of vents are provided on the side wall of the valve body, and the vents are connected to the pressure relief channel through the waterproof breathable membrane assembly; The area of ​​the outer opening of the vent is larger than the area of ​​the inner opening; and / or The two inner side walls of the vent are inclined toward the middle of the vent; and / or The minimum distance between the bottom surface of the inner wall of the vent and the elastic membrane is not less than 5 mm.

11. The explosion-proof valve according to claim 1, characterized in that: The valve cover is provided with a piercing member for piercing the elastic membrane, the piercing member is fixedly connected to the valve cover, and the piercing member is located axially above the elastic membrane; the initial distance between the piercing member and the elastic membrane is 5-40 mm; or At least one side surface of the elastic film is provided with a notch, and the ratio of the depth of the notch to the thickness of the elastic film is 0.1-0.

5.

12. The explosion-proof valve according to claim 11, characterized in that: The initial distance between the piercing element and the elastic membrane is 10-30 mm.

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