Piston type check valve
A technology of check valve and piston type, which is applied in the field of piston type check valve and can solve problems such as insufficient tap water pressure
Inactive Publication Date: 2020-05-05
四川大禹流体科技有限责任公司
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
When the tap water pressure is not enough
Method used
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Embodiment 1
[0008] Example 1, such as figure 1 As shown, a piston check valve includes a valve body (1), a valve core (2), a valve disc (3) and a spring (4). The valve body is cylindrical, and the threaded or The spool is welded. The spool is a cylinder with an inverted convex groove inside, and an annular groove in the middle and lower part. The formed annular cavity communicates with the inverted convex cavity through the gap opened. It is used for water to flow out from the water outlet (5). The lower part of the valve core is also equipped with a circular fixing plate (7) to prevent the valve disc from falling. There is a circular gap in the middle of the fixing plate for the water flow of the water inlet (6). Inflow, the disc is a ring-shaped baffle, inlaid in the ring cavity of the valve core, which is pressed against the ring-shaped fixing plate, and a ring-shaped spring is installed on it. Clearance for easy up and down movement.
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The invention provides a piston type check valve. The piston type check valve comprises a valve body (1), a valve core (2), a valve flap (3) and a spring (4), wherein the valve body is cylindrical, and a cylindrical cavity of the valve body is internally threaded or welded with the valve core; the valve core is a cylinder, an inverted convex groove is formed in the valve core, an annular groove isformed in the middle lower portion of the valve core, a formed circular cavity communicates with the inverted convex cavity through an opened notch, the lower part of the valve core is further provided with an annular fixing plate (7), and an annular notch is formed in the middle of the fixing plate; and the valve flap is an annular baffle and is embedded in the circular cavity of the valve core,the lower portion of the valve flap abuts against the annular fixing plate, the circular spring is mounted on the upper portion of the valve flap, and a gap is formed between the valve core and the valve flap and between the valve core and the spring. According to the check valve, the friction of the internal part of the check valve can be effectively reduced, and the service life of the check valve is prolonged.
Description
technical field [0001] The invention belongs to the technical field of valves, in particular to a piston check valve. [0002] technical background [0003] Check valve is an indispensable and important part of water pipeline transportation, it can effectively ensure the one-way movement of water and prevent backflow. However, most of the traditional check valves are composed of a valve core, a valve body, and a valve core fixing plate. The spool mentioned here refers to the blocking plate used to close the flow channel and the center rod at its upper end to fix the position of the spool. support board. When tap water flows back, the blocking plate on the valve core is subjected to the pressure of water, and under the guidance of the fixed plate, it moves vertically down to close the valve body flow path. The central rod of the valve core is always in contact with the fixed plate of the valve core. Because of the long-term up and down movement, and the uneven force acting ...
Claims
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IPC IPC(8): F16K15/02
CPCF16K15/025
Inventor 冯爱军
Owner 四川大禹流体科技有限责任公司