Ventilation valve

Abstract

The ventilation valve comprises a valve seat, a valve cover and a waterproof ventilation film, the waterproof ventilation film is fixed in the valve seat through welding, the valve cover is provided with at least two ventilation holes, a sinking groove is formed below the ventilation holes, a through hole is formed above the ventilation holes, the through hole is provided with a metal filter screen, and the metal filter screen is embedded into the sinking groove. Suspended particles in outside air are blocked through the metal filter screen, the air holes are prevented from being blocked, meanwhile, the suspended particles are prevented from being attached to the surface of the waterproof and breathable film, the waterproof and breathable film is prevented from being polluted, and the service life of the waterproof and breathable film is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a breather valve technical field especially relates to a breather valve. BACKGROUND

[0002] The breather valve is combined with plastic, metal, silica gel and other materials through injection molding, ultrasonic welding and other forms, forms a sealed installation component, mainly has screw type, buckle type breather valve, and the main performance indexes of the breather valve have two indexes of air permeability and protection level.

[0003] The valve cover is provided with a plurality of air holes, in the using process, the dust, moisture and other impurities in the external environment are easy to enter the valve cover inside through the air hole, and then adhere to the waterproof and breathable membrane on the top end of the valve cover, cause the waterproof and breathable membrane to be contaminated, influence the use effect of the waterproof and breathable membrane, and easily increase the working burden of the waterproof and breathable membrane. SUMMARY

[0004] The utility model discloses a product of preventing pollution and improving service life is provided to overcome the deficiency of the traditional breather valve design.

[0005] To solve the above problems, the utility model adopts the following technical scheme.

[0006] A breather valve, including valve seat, valve cover, waterproof and breathable membrane, waterproof and breathable membrane is fixed in the valve seat through welding, valve cover is equipped with at least two air holes, the lower side of air hole is equipped with the groove, the upper side of air hole is equipped with the through -hole, the through -hole is equipped with the metal filter screen, and is embedded in the groove.

[0007] Preferably, the end surface of the valve cover is provided with a counterbore, the counterbore is provided with at least one threaded hole, and is arranged on one side of the through hole.

[0008] Preferably, the top side of the metal filter screen is provided with an extension, which abuts the counterbore, and the extension is provided with a headless screw and is threadedly connected to the threaded hole.

[0009] Preferably, the valve seat is provided with a recess for accommodating the waterproof and breathable membrane, and the recess is provided with a perforation.

[0010] Preferably, the valve seat is provided with a nut portion, and the outer wall of the valve seat is provided with a threaded groove.

[0011] Beneficial effects:

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses, through the metal filter screen, the suspended particulate matter in outside air is blocked, avoid the air hole to meet the blockage, simultaneously, still prevent the suspended particulate matter from adhering to the surface of waterproof air permeable membrane, avoid its being contaminated, prolong the service life of waterproof air permeable membrane. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a side sectional structure schematic diagram of a kind of air valve of the utility model;

[0015] Figure 2 It is an explosion drawing of a kind of air valve of the utility model;

[0016] The corresponding relationship between the annotations of each drawing in the figure and the component names is as follows:

[0017] Reference signs: 1, valve seat;2, valve cover;3, waterproof air permeable membrane;4, metal filter screen;5, headless screw;11, concave cavity;12, perforation;13, nut part;14, thread groove;21, air hole;22, sink groove;23, through hole;24, counterbore;25, threaded hole;41, extension. DETAILED DESCRIPTION

[0018] The technical solutions of the utility model will be described clearly and completely in combination with embodiments, obviously, the described embodiments are a part of embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.

[0019] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0020] In the embodiments of the utility model, "and / or" is only a description of the association relationship of the associated object, which means that there can be three kinds of relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the associated objects before and after are in an "or" relationship.

[0021] REFERENCE EXAMPLE Figure 1 、 Figure 2The utility model provides a kind of air breather, including valve seat 1, valve cover 2, waterproof air breather film 3, waterproof air breather film 3 is fixed in valve seat 1 by welding, valve cover 2 is equipped with at least two air holes 21, air hole 21 below is equipped with sink groove 22, air hole 21 top is equipped with through hole 23, through hole 23 is equipped with metal filter screen 4, and is embedded in sink groove 22. The roll of waterproof air breather film 3 is usually involved cutting and welding steps during construction, film cutting refers to cutting waterproof air breather film 3 into certain shape and size according to design requirement, and film welding refers to that the film material is connected by heat sealing or other ways to ensure the waterproofness and air tightness of joint, film welding process is one kind of welding process according to its technical characteristics, which utilizes heat energy to melt material surface, so that the joint part of film material is fused together to form a continuous, closed joint, and the suspended particulate matter in external air is blocked by metal filter screen 4, to avoid air hole 21 from being blocked, and also prevent suspended particulate matter from adhering to the surface of waterproof air breather film 3, to avoid pollution and prolong the service life of waterproof air breather film 3.

[0022] It is worth mentioning that the end surface of valve cover 2 is provided with a counterbore 24, the counterbore 24 is provided with at least one threaded hole 25, and is arranged on one side of the through hole 23, the counterbore 24 makes the surface of the metal filter screen 4 consistent, so as to have the effect of preventing pollution without changing the overall size, and the threaded hole 25 is matched with the headless screw 5;

[0023] It is worth mentioning that the top side of the metal filter screen 4 is provided with an extension 41 abutting against the counterbore 24, the extension 41 is provided with the headless screw 5 and is threadedly connected to the threaded hole 25, and the metal filter screen 4 is firmly fixed in the counterbore 24 by the headless screw 5;

[0024] It is worth mentioning that the valve seat 1 is provided with a recess 11 accommodating the waterproof air breather film 3, the recess 11 is provided with a through hole 12, and the device on the container, tank or closed space is matched with the air hole 21 through the through hole 12, the waterproof air breather film 3 to adjust the pressure difference between the inside and the outside, to prevent structural damage caused by excessive pressure difference;

[0025] It is worth mentioning that the valve seat 1 is provided with a nut part 13, and the outer wall of the valve seat 1 is provided with a threaded groove 14, and the nut part 13 facilitates the tool to connect and fix the threaded groove 14 on the device on the container, tank or closed space.

[0026] The above design scheme can realize the advantages of preventing pollution and prolonging service life.

[0027] The above is further detailed description of the utility model in combination with specific embodiments, and cannot be determined that the utility model specific implementation is limited to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A breather valve comprising a valve seat (1), a valve cover (2), a waterproof breather membrane (3) fixed in the valve seat (1) by welding, characterized in that: The valve cover (2) is provided with at least two air vents (21), the lower side of the air vents (21) is provided with a sink (22), the upper side of the air vents (21) is provided with a through hole (23), the through hole (23) is provided with a metal filter screen (4), and is embedded in the sink (22).

2. The breather valve of claim 1, wherein: The end surface of the valve cover (2) is provided with a counterbore (24), the counterbore (24) is provided with at least one threaded hole (25), and is arranged on one side of the through hole (23).

3. The breather valve of claim 2, wherein: The top side of the metal filter screen (4) is provided with an extension (41) and abuts against the counterbore (24), the extension (41) is provided with a stud bolt (5) and is threadedly connected to the threaded hole (25).

4. The breather valve of claim 1, wherein: The valve seat (1) is provided with a recess (11) for accommodating a waterproof air-permeable film (3), and the recess (11) is provided with a perforation (12).

5. The breather valve of claim 1, wherein: The valve seat (1) is provided with a nut portion (13), and the outer wall of the valve seat (1) is provided with a threaded groove (14).

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