JPS609495Y2 - non-return valve - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in check valves.

Conventionally, this type of check valve has generally been provided with a guide piece only on the primary side or only on the secondary side of the valve body.

Therefore, the valve body tends to tilt, and accurate operation cannot be expected.

In addition, a guide piece is protruded from the primary side of the valve body to make sliding contact with the inner circumferential surface of the valve seat, and a shaft is made to protrude from the secondary side of the valve body. There is also one in which the valve body, guide piece, and shaft are integrally formed so that they slide in the moving hole.

However, with this type, the contact surface on the inner circumferential surface of the sliding hole on which the shaft slides is small, so the sliding can cause wear, causing rattling and causing the valve body to tilt relative to the valve seat, causing the seal to deteriorate. It cannot be said to be reliable, its operation is not smooth, and the valve body,
There are various drawbacks such as the fact that even if one member of the guide piece or shaft is to be replaced, all of them must be replaced.

The present invention aims to solve the above-mentioned drawbacks and provide a check valve that has a reliable seal, operates smoothly, and is very easy to repair and replace.

The present invention will be explained in detail below based on the illustrated embodiments.

In the figure, 1 is a valve housing, 2 and 3 are its inlet and outlet, and the flow path 4 that connects the inlet 2 and outlet 3 is connected to the primary side 4a and the secondary side 4b by the valve seat 5. It is sectioned.

In addition, the valve housing 1 has a primary side 4a and a secondary side 4 facing the valve seat 5.
Openings 8 and 9 each having a removable lid 6.7 are provided in b.

The lids 6 and 7 are formed into a cross-sectional shape, and are mounted in the openings 8 and 9 in a concave state toward the inside of the valve housing 1 by screwing the screws provided on the outer periphery to the screws on the inner periphery of the openings 8 and 9. The lid 6 screwed onto the opening 8 on the secondary side 4a (hereinafter referred to as the lower lid, and the lid 7 screwed onto the opening 9 on the secondary side 4b referred to as the upper lid) has a A cylindrical strainer 10 is provided which is removably inserted and locked.
When the lower i6 is completely screwed into the opening 8, the tip of the lower part 10 comes into close contact with the partition wall 11 forming the valve seat 5, surrounding the valve seat 5.

12 is a valve body arranged on the secondary side 4b and corresponding to the valve seat 5;
A spring 13 mounted between the back surface and the inner bottom surface of the upper lid 7 constantly presses the valve seat 5 toward the valve seat 5 side.

Therefore, in the valve constituted by the valve body 12 and the valve seat 5, the fluid flows into the valve body 12 against the elastic force of the spring 13 due to the inflow pressure.
The valve opens by pushing up 2.

The valve body 12 also has guide pieces 14 on its front and back sides, respectively.
．． 15 is provided, the guide piece 14 on the front surface is brought into sliding contact with the inner peripheral surface of the valve seat 5, and the guide piece 15 on the back surface is brought into sliding contact with the sliding part 19.

In this embodiment, the sliding portion is the inner peripheral surface of the upper lid 7.

The guide pieces 14 and 15 are both manufactured by stamping metal plates, and consist of a circular seat part A and a plurality of leg openings bent at appropriate positions on the periphery thereof.

The guide pieces 14 and 15 are arranged back to back with the guide pieces sandwiching the gasket 16 of the valve body 12, and are assembled and fixed together with the gasket 16 by fixing means 17 such as bolts, nuts, and screws. 12.

The guide piece 15 on the back side of the valve body 12 has a diameter of the seat part I formed to be the same as or larger than the diameter of the seal 16 so that the guide piece 15 can press the seal 16 and reliably hold it in a flat state.

Therefore, as in the illustrated embodiment, the inner diameter of the upper M7 is 16.
If the diameter is smaller than the diameter of the leg opening, make a notch 18 inward from the periphery of the bottom part 7 so that the diameter of the circle touching the outer surface of the leg opening is slightly smaller than the inner diameter of the top cover 7. Bend the leg opening.

As described above, the present invention is equipped with a guide piece having a plurality of legs on each of the front and back surfaces of the valve body, so the length of the guide can be long in both the vertical and horizontal directions, and the valve body It is possible to obtain a check valve that does not tilt at all, has accurate operation, and is durable.

Furthermore, unlike conventional products, the inner surface of the sliding hole is not worn due to the sliding movement and does not become rattled.

Further, since the guide piece clamps the packing through the fixing means, it can be easily disassembled.

That is, the two guide pieces, the packing, and the fixing means can be easily separated or assembled.

Therefore, repair and replacement are easier than conventional products.

Furthermore, since the guide piece is formed by stamping a metal plate, it is very inexpensive.

Furthermore, since the guide piece on the front surface of the valve body has a water passage portion between the protruding legs, water can flow smoothly without providing resistance to water passage or reducing the passage.

Therefore, the intended purpose can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the check valve of the present invention, Fig. 2 is an enlarged longitudinal cross-sectional view of the upper guide piece, which is the main component of the check valve of the present invention, and Fig. 3 is a cross-sectional view of the check valve of the present invention. A cross-sectional view along the line. In the figure, 1... Valve housing, 5... Valve seat, 12
... Valve body, 14 ... Guide piece, 15.
...Guide piece, 16...Patzkin, 17
...Fixing means, 19...Sliding part.

Claims (1)

[Scope of utility model registration request] Two guide pieces each having a plurality of legs are formed by punching and forming a metal plate, and a gasket is sandwiched and fixed between the guide pieces via a fixing means to constitute a valve body. This valve body with a guide piece protruding from the bottom is placed on the secondary side of the flow path, and the legs of the guide piece on the front side of the valve body are brought into sliding contact with the inner peripheral surface of the valve seat, and the water passes between the legs. A check valve characterized in that the guide piece on the back side is in sliding contact with the inner peripheral surface of a sliding part provided on the secondary side of the flow path.