KR200210765Y1 - The whirling thwart-valve - Google Patents

Abstract

The present invention relates to a non-return valve for blocking a back flow of a fluid, and more particularly to a non-return valve for preventing a water hammering phenomenon by absorbing the shock generated during the reverse flow by placing a buffer portion in the valve.

Background Art A conventional non-return valve has a housing in which a bracket is integrated, and a disk-shaped valve which opens and closes an inflow passage of a housing by elasticity of a spring has been used therein. The valve having such a structure shuts off the fluid passage due to the instantaneous backflow pressure of the fluid at the time of fluid backflow, and at the same time, the water hammering phenomenon and the impact sound occur. As the water hammering phenomenon occurs repeatedly, cracks and breaks in the outflow passages cause shortening of the life of the housing.

Accordingly, the present invention provides a non-return valve having a housing in which a bracket is integrated in an inlet formed at one side of a valve body into which fluid is introduced, and a valve configured to open and close an inlet passage by elasticity of a spring therein. A support hole is provided at the rear end of the bracket, and a stem coupled to the valve rear surface is inserted into the support hole, and a spring is elastically installed around the stem, and a hollow part is formed inside the valve, and an elastic crimp is formed around the valve. One structure has an effect of preventing the water hammering phenomenon during fluid backflow.

Description

Non-return valve {The whirling thwart-valve}

The present invention relates to a non-return valve, and more particularly, to a non-return valve for preventing a shock sound along with a water hammering phenomenon by forming a buffer in the valve to absorb a shock applied when the fluid flows back.

In general, the non-return valve is installed on one side of the pipe connected to the water meter. When the water is shut off by the user, the fluid is flowed back at the same time and the valve blocks the fluid passage of the housing and the water flows due to the flow of the back flow. It is used to prevent the meter from being reversed.

This conventional non-return valve has a housing 10 in which the bracket 12 is integrated as shown in FIG. 1, and opens and closes the outlet passage 11 of the housing 10 by the elasticity of the spring 3. The valve 20 is incorporated in the bracket 12, and the valve 20 is made of a disk-shaped rubber and a synthetic resin having elasticity.

Therefore, the valve blocks the outflow passage by the hydraulic pressure of the fluid during the backflow, thereby preventing the backflow of the fluid.

However, in the conventional non-return valve, a shock sound is generated along with a water hammering phenomenon in which the fluid flow is pressurized by the instantaneous fluid pressure when the reverse flow of the fluid is blocked, and the outflow passage is cracked and Cracks or breakage can shorten the life of water meters and peripherals.

The present invention was devised to solve the same problem as the prior art, and its purpose is to form a structure in which a valve for opening and closing the outflow passage by the elastic spring is buffered to absorb water pressure and shock generated when the fluid flows backward, The present invention provides a non-return valve that eliminates the hammering phenomenon and the impact noise and prevents the housing from cracking and breaking, thereby prolonging the life of the housing.

1 is a cross-sectional view of a conventional valve coupling.

Figure 2a, 2b is an operating state diagram of the non-return valve according to the first embodiment of the present invention.

Figure 3a is a cross-sectional view of the combined non-return valve in accordance with a second embodiment of the present invention.

Figure 3b is an exploded perspective view of the non-return valve in accordance with a second embodiment of the present invention.

Figure 4a, 4b is a state of use of the non-return valve in accordance with a third embodiment of the present invention.

Figure 4c is a cross-sectional view taken along the line A-A showing the coupling structure of the opening and closing port.

*** Description of the symbols for the main parts of the drawings ***

1-valve body 2-strainer 3-spring

5-Inlet 10-Housing 11-Outlet

12-Bracket 20-Valve 21-Hollow

22-Crease 30-Stem 40-Openings

In order to achieve the above object, the non-return valve of the present invention includes a housing in which a bracket is integrated in an inlet formed at one side of a valve body into which fluid is introduced, and opens and closes an inlet passage by elasticity of a spring therein. In the non-return valve installed,

A support hole is provided at the rear end of the bracket, and a stem coupled to the valve back and inserted into the support hole and a spring is elastically installed around the stem, have a hollow portion in the valve, and an elastic pleat on the outer circumferential surface thereof. Is achieved by forming.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention will be described in detail.

Figure 2a, 2b is a state diagram of the operation of the valve according to the first embodiment of the present invention, the housing in which the bracket (12) is formed on one side in the inlet port (5) of the valve body (1) into which fluid is introduced ( 10 is inserted into the housing 10, the valve 20 for opening and closing the outflow passage 11 by the elasticity of the spring (3) is provided.

The valve 20 forms a hollow portion 21 so as to absorb shocks, and a pleat portion 22 that is stretchable is formed around the valve 20.

In addition, a support hole 13 is formed at the rear side of the bracket 12, and an insertion hole 25 is formed at the rear end of the valve 20 to couple the stem 30 sliding to the support hole 13, and the stem ( 30 is coupled to the insertion hole 25 of the valve 20 so that the valve 20 operates stably.

The strainer 2 is coupled to the fluid inlet 5 of the housing 10 to protect it from various foreign substances.

The valve 20 having such a structure is naturally opened by the hydraulic pressure when the fluid is introduced to flow the fluid [Fig. 2a], when the flow of the fluid is blocked by the water locking device not shown in the figure the fluid flows back immediately At the same time, the valve shuts off the fluid passage 11 (FIG. 2B).

At this time, the valve 20 blocks the fluid passage 11 with a strong pressure by a momentary reverse flow. The impact is absorbed by the hollow part 11 formed inside the valve 20, and a shock sound and a water hammering phenomenon occur. You will not.

Therefore, even when used for a long time, the fluid passage 11 does not generate cracks, thereby extending the life of the peripheral device as well as the life of the housing 10.

3A is a cross-sectional view illustrating a coupling of a non-return valve according to a second embodiment of the present invention, and FIG. 3B is an exploded perspective view of the valve according to the second embodiment of the present invention.

As shown in the drawing, the housing 10 has the same structure as that of the first embodiment, but the valve 20 having the hollow portion 22 is formed by dividing and combining the two bodies into two parts, and inside the valve 20. It is provided with the spring 4, so that it can endure a larger impact.

Figure 4a, 4b is a state diagram of the use of the non-return valve in accordance with a third embodiment of the present invention, Figure 4c is a cross-sectional view taken along the line AA showing the coupling structure of the opening and closing, the guide groove 42 in the housing 10 in the upper and lower parts In addition, the guide protrusion 41 is inserted into the sliding guide is formed in the upper and lower portions and has an opening 40 through the center.

In addition, the fixing passage 8 is screwed to the tip of the outflow passage 11, and a spring 7 for close contact with the opening and closing port 40 is coupled between the fixing ring 8 and the opening and closing port 40.

The operation state of the non-return valve by such a structure is as follows.

When the fluid flows by the user, the valve 20 is naturally retracted by the water pressure, and is spaced apart from the opening and closing port 40 (FIG. 4A).

In this way, when the flow of the fluid is blocked by the user, the valve 20 exerts a strong pressure on the opening / closing opening 40 by instantaneous backflow and simultaneously blocks the flow of the backflowing fluid [FIG. 4B].

At this time, the spring 7 provided at the front end of the opening and closing port 40 absorbs the shock of the valve 20 to prevent the impact sound with the water hammering phenomenon.

With this structure, the non-return valve of the present invention can be installed not only in the water meter but also in the flowmeter for checking the flow rate of the fluid.

As described above, the present invention forms a hollow portion inside the valve or absorbs the impact of the valve when the fluid flows back by a structure having a spring to eliminate water hammering phenomenon, thereby preventing the housing from being cracked and broken. There is an effect that the life of the housing lasts for a long time.

Claims (3)

It is provided with a housing 10 in which the bracket 12 is integrated in the inlet 5 formed at one side of the valve body 1 into which the fluid is introduced, and the inflow passage 11 by the elasticity of the spring 3 therein. In the non-return valve provided with the valve 20 which opens and closes), A support hole 13 is provided at the rear end of the bracket 12, and a stem 30 coupled to the rear surface of the valve 20 and inserted into and out of the support hole 13, and a spring 3 around the stem 30. ) Elastically installed, the hollow portion (21) in the inside of the valve (20), the elastic wrinkles around the forming a pleated portion (22) characterized in that the backflow prevention valve characterized in that to absorb the impact. 2. The non-return valve according to claim 1, wherein the valve (20) is formed in two entities, and a spring (4) is built in the valve (20). The upper and lower guide grooves 42 are provided in the housing 10, and the guide protrusions 41 inserted into and slid therein are formed in the upper and lower parts, and the opening and closing hole 40 penetrates the center thereof. A non-return valve, characterized in that the fixing ring (8) is screwed to the tip of the outlet passage (11), and a spring (7) is provided between the fixing ring (8) and the opening and closing port (40).