Standard metric thread pressure balance valve for waterproof and air permeation

Abstract

The utility model discloses a standard metric thread waterproof and breathable pressure balance valve, include: upper cover, surface circumferential even distribution several U shape through -hole, be used for air exchange and block foreign matter and enter, base, with upper cover cooperation and connection, constitute valve body main part, inner cover, be located on the channel of inside air exchange of base, waterproof and breathable membrane, make by the modification treatment of the surface hydrophobic oleophobic of expanded polytetrafluoroethylene ePTFE microporous membrane, micropore diameter is 0.01~15um, fixed in the air intake side of inner cover, form waterproof and breathable barrier, through above -mentioned mode, the utility model can effectively solve the sealing problem of new energy automobile battery package in the use process because of the internal and external pressure difference, prevent the invasion of water vapor, dust and chemical liquid simultaneously, guarantee the safe operation of battery package, prolong the battery life, improve the reliability and safety of new energy automobile.

Claims

1. A pressure balance valve for waterproof and air permeable use of a standard metric screw thread, characterized by, include: The top cover has several U-shaped through holes evenly distributed around its circumference to facilitate airflow exchange and prevent foreign objects from entering. The base, which mates with the top cover, forms the main body of the valve. The inner sleeve is located in the airflow exchange channel inside the base; The waterproof and breathable membrane is made of expanded polytetrafluoroethylene (ePTFE) microporous film with surface hydrophobic and oleophobic modification treatment. The micropore size is 0.01-15μm. It is fixed to the air inlet side of the inner sleeve to form a waterproof and breathable barrier.

2. A pressure balanced water-shielded venting valve for standard metric threads according to claim 1, characterized in that, The inner sleeve has an annular pattern structure, which is used to seal the connection with the inner wall of the base.

3. The IP standard thread water-seal breather pressure equalizing valve in accordance with claim 1, wherein, The waterproof and breathable membrane is firmly sealed to the inner sleeve by hot melt welding, ultrasonic welding or laser welding.

4. The standard metric threaded waterproof and breathable pressure balancing valve according to claim 1, characterized in that, The top cover is made of plastic, and the base is made of metal. The base and the top cover are fixedly connected by riveting.

5. The IP valve according to claim 1, characterized in that, The base adopts a standard metric thread structure for quick installation on new energy battery packs or other sealed enclosures that require pressure balance.

6. The IP standard thread water-seal breather pressure equalizing valve in accordance with claim 1, wherein, The U-shaped through-hole includes an open end, an outlet end, and a U-shaped curved channel. The open end is connected to the outside of the valve body, the outlet end faces the inside of the valve body, and the U-shaped curved channel connects the open end and the outlet end, forming a meandering airflow path.

7. A standard metric threaded pressure equalizing valve for water-tight venting according to claim 6, characterized in that The opening direction of the opening end is oblique or radial, which is used to adapt to the airflow guidance requirements of various environments.

8. The IP valve according to claim 1, characterized in that The pressure balancing valve is prepared by welding a waterproof and breathable membrane onto the inner sleeve to form a membrane assembly; pressing the membrane assembly into the breathable channel of the base; riveting the top cover to the base; and finally installing a sealing ring on the base to complete the valve body preparation.

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