JPH10288268A - Spring energizing disk type check valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a spring energizing disk type check valve which is capable of securing passing a flow rate by reducing pressure loss of the fluid flowing down to an exit from an entrance. SOLUTION: A valve element 6 energized by a coil spring 11 is arranged on an exit 3 side of an annular valve seat 5. A rectifying path 13 is formed on the outer peripheral part of the valve element 6. A cylindrical sleeve 15 is provided integrally with the valve element 6. The passing flow rate can be secured by reducing pressure loss because the fluid flowing down to the exit 3 from the entrance 1 is rectified while the fluid passes in the rectifying path 13 on the outer periphery of the valve element 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve which is attached to a fluid pipe and allows a forward flow of a fluid by a spring-biased valve body provided therein, but closes a reverse flow of the fluid. The present invention relates to a spring-loaded disk check valve capable of minimizing turbulence when a fluid flows down the inside of a valve, reducing pressure loss due to the turbulence, and increasing a flow rate.

[0002]

2. Description of the Related Art An example of a spring-loaded disk check valve is disclosed in Japanese Utility Model Publication No. 49-36740. In this method, an annular valve seat is provided in a valve casing having an inlet and an outlet, a disc-shaped valve body is arranged on the outlet side of the annular valve seat, and the disc-shaped valve body is closed on the outlet side of the disc-shaped valve body. A coil spring biasing in the valve direction is disposed, a rib is provided on the inner peripheral wall of the valve casing, and the outer periphery of the disc-shaped valve body is slid on the inner surface of the rib.

[0003]

The above-mentioned conventional spring-biased check valve is designed so that when the disc-shaped valve element is separated from the annular valve seat and the fluid from the inlet flows down to the outlet, the fluid is disc-shaped. The flow direction changes by colliding with the inlet side surface of the body, and the flow is greatly disturbed from the outer peripheral end of the disc-shaped valve body to the outlet side. There is a problem that the flow rate to be reduced becomes small.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a spring-actuated disk check valve capable of minimizing the pressure loss of a fluid flowing down from an inlet to an outlet and securing a sufficient flow rate to the outlet. That is.

[0005]

In order to solve the above-mentioned problems, the present invention has been made to solve the above-mentioned problems by providing an inlet and an outlet by valve casing, providing an annular valve seat between the inlet and the outlet, By placing a flat plate-shaped valve body on the outlet side of the annular valve seat so as to be able to freely depart and seat by biasing the spring, the passage of fluid in the forward direction is allowed, but the fluid in the reverse direction is closed. A spring for fixing a sleeve sliding on the inner periphery of the annular valve seat, providing a through hole on the valve body side of the sleeve, and for urging the valve body in the valve closing direction via the sleeve. And a rectifying passage is provided at a location where the fluid flows down at the outer periphery of the spring-biased valve body in contact with the annular valve seat.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS When a fluid flows down from an inlet to an outlet, a rectifying passage is provided at a location where the fluid flows down on the outer periphery of the contact portion of the valve body with the annular valve seat. The flow is rectified through the rectifying passage to reach the outlet and the turbulence is reduced, so that the pressure loss is also reduced, and the resistance of the fluid flowing down to the outlet is reduced, so that the flow rate can be maintained and secured.

The rectifying passage may be provided as a through-hole penetrating the valve body, or a plate-like passage or a wing portion may be provided on the outer peripheral portion and a part of the inlet / outlet surface of the valve body to form a rectifying passage. .
In short, the rectifying passage may be any rectifying passage that can prevent and reduce the turbulence in the portion where the flow state of the fluid is disturbed, or correct the turbulence and rectify the fluid.

When the fluid pressure on the outlet side becomes higher than that on the inlet side, the fluid on the outlet side tends to flow back to the inlet side.
The spring-biased valve body is seated on the annular valve seat to prevent the fluid from flowing back to the inlet side.

[0009]

In FIG. 1, an inlet member 2 provided with an inlet 1 and an outlet member 4 provided with an outlet 3, an annular valve seat 5 provided between the inlet 1 and the outlet 3, and an outlet 3 side of the annular valve seat 5 are provided. A plate-shaped valve element 6 disposed, and a rectifying passage 13 provided on an outer peripheral portion of the valve element 6
And a spring-biased disc check valve. In the present embodiment, an example is shown in which an auxiliary valve element 7 is further disposed at the center of the valve element 6.

A valve chamber 8 is formed by the inlet member 2 and the outlet member 4, and an annular valve seat 5 is attached to an end of the inlet member 2 on the valve chamber 8 side. The annular valve seat 5 is made of a synthetic rubber or a synthetic resin, or a copper or stainless metal material in accordance with the type of fluid passing therethrough. Contact the sealing surface.

A cylindrical sleeve 15 is provided on the inlet 1 side of the valve element 6.
Are integrally formed. The outer diameter of the sleeve 15 is
Is slightly smaller than the inner diameter of the annular valve seat so as to be slidable on the inner circumference of the annular valve seat. A plurality of through holes 16 penetrating through the sleeve 15 are provided on the valve 15 side of the sleeve 15. Three
A spring receiver 17 is fixed to an end of the valve 15 on the inlet 1 side, and a sleeve 15 is provided between the spring receiver 17 and the end of the annular valve seat 5.
The coil spring 11 as an urging means is arranged outside the.
When the valve element 6 and the sleeve 15 move integrally to the outlet 3 side, the coil spring 11 is compressed, and the valve element 6 is urged toward the annular valve seat 5 side, that is, in the valve closing direction by a spring force as a reaction force of this compression. This prevents the backflow from the outlet 3 to the inlet 1 side.

A plurality of ribs 18 are mounted inside the inlet member 2 so that the spring receiver 17 can slide left and right along the ribs 18. A plurality of pipes 20 are mounted inside the sleeve 15 in parallel with the central axes of the inlet 1 and the outlet 3 to form a straightening passage on the inlet side. The rectifying passage 20 on the inlet side can rectify the fluid while the fluid from the inlet 1 passes through the inside.

A screen 19 having a large number of small-diameter holes is attached between the inner periphery of the sleeve 15 and the through hole 16. When the valve element 6 separates from the annular valve seat 5, the inlet 1
From the rectifying passage 20, the screen 19 and the through hole 1
6 through the straightening passage 13 on the outer periphery of the valve body 6 and the outlet 3
It flows down to the side.

A communication hole 12 for communicating the inlet 1 and the outlet 3 is provided at the center of the valve body 6, and the auxiliary valve body 7 is arranged facing the outlet 3 side of the communication hole 12. The auxiliary valve element 7 is a flat plate having a size capable of covering the communication hole 12 and is made of synthetic rubber, synthetic resin, or a metal material, like the annular valve seat 5. A coil spring 14 as urging means is disposed in a compressed state between the outlet 3 of the auxiliary valve element 7 and the spring receiver 10 to constantly urge the auxiliary valve element 7 toward the communication hole 12 of the valve element 6. .

The spring receiver 10 has a substantially conical shape and a plurality of straight pipes 21 provided therein. This straight pipe line 21 is also provided in parallel with the central axis of the inlet 1 and the outlet 3 to form a straightening passage on the outlet side. The rectifying passage 21 on the outlet side can further rectify the fluid flowing down through the rectifying passage 13 on the outer periphery of the valve body 6.

The valve body 6 and the auxiliary valve body 7 are urged toward the inlet 1 by coil springs 11 and 14, respectively.
The spring strength of the coil spring 14 for urging the auxiliary valve body 7 is smaller than that of the coil spring 11 for urging the valve body 6, and the fluid pressure from the inlet 1 As a result, the auxiliary valve element 7 first opens the communication hole 12 and then the fluid pressure from the inlet 1 rises to a predetermined value and the valve element 6
Is formed so as to separate from the annular valve seat 5 and open.

When the fluid flows down from the inlet 1 and the fluid pressure is almost equal to zero, both the valve body 6 and the auxiliary valve body 7 are kept urged by the coil springs 11 and 14 and the annular valve seat 5 And the valve body 6 is seated, so that the fluid does not pass to the outlet 3.

When the fluid pressure rises and becomes, for example, about 0.05 to 0.1 KG, the auxiliary valve element 7 urged by the coil spring 14 having a small spring constant opens the communication hole 12 and opens the inlet port. The fluid from 1 flows down to the outlet 3. Therefore,
Even if the fluid pressure is low, the auxiliary valve element 7 opens the communication hole 12 and communicates the inlet 1 and the outlet 3 before the valve element 6 opens, thereby ensuring a sufficient flow rate. it can.

When the fluid pressure from the inlet 1 further increases,
Not only the auxiliary valve element 7 but also the valve element 6 overcomes the spring force of the coil spring 11 and separates from the annular valve seat 5, so that the rectifying path 20, the through hole 16, the rectifying path 13 on the outer periphery of the valve element 6, and More fluid flows down to the outlet 3 through the straightening passage 21 on the outlet side. In this case, the fluid flowing down to the outlet 3 is rectified while passing through the rectifying passages 20, 13, and 21,
Reduce fluid turbulence.

When the fluid pressure on the outlet 3 side becomes higher than the fluid pressure on the inlet 1 side, the fluid on the outlet 3 side tends to flow back to the inlet 1 side. 12 is closed, and the valve body 6 is seated on the annular valve seat 5 to prevent the fluid from flowing back to the inlet 1 side.

[0021]

As described above, the spring-loaded disk check valve according to the present invention can reduce the pressure loss by reducing the turbulence of the fluid from the inlet to the outlet by the rectifying passage, and can reduce the pressure loss. Flow rate can be sufficiently ensured.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a spring-biased disc check valve according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 inlet 3 outlet 5 annular valve seat 6 valve body 7 auxiliary valve body 10 spring receiver 11 coil spring 12 communication hole 13 rectifying passage 14 coil spring 15 sleeve 16 through hole 17 spring receiver 18 rib 19 screen 20 on inlet side Straightening passage 21 Straightening passage on the exit side

Claims (1)

[Claims] 1. An inlet and an outlet are formed by valve casing, an annular valve seat is provided between the inlet and the outlet, and a flat valve body is spring-biased on the outlet side of the annular valve seat to separate the seat. By arranging freely, a fluid sliding in the inner periphery of the annular valve seat is fixed to the valve body by allowing the fluid in the forward direction to pass but closing the fluid in the reverse direction. A valve is provided with a through hole on the valve body side, and a spring for biasing the valve body in the valve closing direction via the sleeve is disposed, and the spring-biased valve body comes into contact with the annular valve seat. A spring-biased disc-type check valve characterized in that a rectifying passage is provided at a location where fluid flows down on the outer periphery.