KR200231059Y1 - Check Valve for Water Supply System - Google Patents

Abstract

The present invention discloses a check valve for a water supply device having a removable knob formed on an outer circumference of a housing, a valve guide formed on an inner circumference, and a check key bolt installed on a cover.

It is an object of the present invention to provide a check valve for a water supply device that can be easily attached and detached in a housing, prevents flow and noise during operation of the check valve body, and can easily check whether the backflow is prevented.

The present invention has a cover coupled to the upper side of the body having a side inlet and a bottom outlet, the housing, the check valve body, the spring installed in the known check valve, a plurality of at regular intervals formed on the outer periphery A housing consisting of a detachable knob, an o-ring groove formed on the lower side of the detachable knob, and a valve guide formed of a plurality of valve guides formed at a predetermined interval on the inner circumference, and a check key bolt having a stop ring groove formed on the lower side and having an oil drain hole formed therein; Characterized in that consisting of a cover formed with a check hole is inserted into the inspection key bolt.

The present invention as described above can easily check whether the backflow of the fluid discharged from the inlet to the outlet, easy to remove the housing, easy to repair or replace the parts in the actual use state without disassembly of the pipe connection simple and easy The check valve body does not flow, so there is an effect of accurate operation without vibration and noise.

Description

Check Valve for Water Supply System

The present invention relates to a check valve for a water supply device, and more particularly, to a check valve provided with a removable knob on the outer periphery of the housing, a valve guide on the inner periphery, and a check key bolt installed on the cover.

In general, the supply of water or hot water in a general house or apartment varies depending on the height of the user's location and the perspective from the source.

That is, if the position is low or the distance from the source is close, the water pressure is counted more than necessary, and if the position is high or the distance from the source is too high, the pressure is very low or uneven.

That is, the flow direction of water is different according to the pressure difference.

This difference in water pressure, in addition to the problem of unbalanced use of water, there is a problem of backflow due to the negative pressure difference in the pipeline.

In addition, in the hot water supply system by the centralized heating system, when the water pressure is different from the cold water system, backflow occurs to cause a problem of contaminating the drinking water.

In order to solve this problem, the present applicant has filed a patent and a utility model (patent application No. 1994-023203 and many others) of the check valve to prevent the reverse flow occurs when the negative pressure inside the pipe.

The check valve filed by the present applicant has a cover coupled to an upper side of a body having an inlet and an outlet, and a housing, a check valve body, a bracket, and a spring are installed in the body, and the check valve has a simple structure and a reverse flow. However, it is difficult to attach and detach the housing during repair or maintenance, there is a risk that the check valve body flows when it is raised or lowered in the housing, and there is a problem that it cannot be easily checked from the outside to prevent backflow. .

The present invention has been devised to solve the above problems, the object of the present invention is to form a removable knob on the outer periphery of the housing and to form a valve guide on the inner periphery, by installing a check key bolt on the cover, The present invention provides a check valve for a water supply device that can be easily attached and detached, prevents flow during operation of the check valve body, and induces correct operation, and enables easy external inspection to prevent backflow.

1 is a cross-sectional view of the check valve according to the present invention.

Figure 2 is an exploded perspective view of the check valve according to the present invention.

Figure 3 is a sectional view according to another embodiment of the check valve according to the present invention.

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

10 check valve 11 body 14 cover

15: inspection hole 17: inspection key bolt 16,20,32,37: O-ring

18: latex outflow hole 19: stop ring groove 21: stop ring

22 housing 23 removable knob 24 O-ring groove

25 valve guide 26 check orifice 27,39 check valve body

34,40 Bracket 38: Needle pin bolt

The present invention is a cover coupled to the upper side of the body having a side inlet and the bottom outlet, the housing, check valve body, bracket, spring is installed in the known check valve, a plurality of at regular intervals on the outer periphery A check key bolt formed of a detachable knob formed in the opening, an O-ring groove formed on the lower side of the detachable knob, a valve guide formed in a plurality at regular intervals on the inner circumference, and a stop ring groove formed on the lower side thereof, and an oil drain hole formed therein And, characterized in that consisting of a cover formed with a check hole is inserted into the check key bolt.

The present invention as described above is easy to attach and detach the housing, has a precise performance without flow when the check valve body is operating, it can be easily checked from the outside whether or not the water flow back.

Referring to the configuration and operation of the present invention in detail based on the accompanying drawings as follows.

1 is a cross-sectional view of the check valve according to the present invention, Figure 2 is an exploded perspective view of the check valve according to the present invention.

As shown in the drawing, the present invention has an inlet 12, an outlet 13, and an outlet orifice 11a formed therein, and an upper portion of the housing 22 accommodated inside the body 11 to which the cover 14 is coupled. A plurality of detachable knobs 23 are formed on the outer periphery at regular intervals, and an O-ring groove 24 is formed on the lower side of the detachable knob 23, and the valve guides are formed at regular intervals on the inner periphery of the housing 22. Form a plurality of 25).

In addition, there is a rod-shaped tail portion 29 formed in the housing 22 to open and close the check orifice 26 and have a conical head portion 28 having an O-ring groove 30 and a guide groove 31 therein. A check valve body 27 having a guide rod, a guide rod 35 inserted into a guide groove 31 of the check valve body 27, and an emulsion guide hole 36 formed radially around the guide rod 35. It is provided with a bracket 34 and a spring 33 is installed between the check valve body 27 and the bracket 34 to provide a perfect backflow prevention function.

In addition, the inspection hole 15 is formed in the center of the cover 14, the stop ring groove 19 is formed at the lower end and the inspection key bolt 17 is provided with the fluid discharge hole 18 therein, the inspection It is configured to insert and check the check key bolt 17 to the ball (15).

On the other hand, Figure 3 is a cross-sectional view showing another embodiment of the check valve according to the present invention, a central hole 41 is formed in the center of the bracket 40, the tail 29 of the valve 39 is The needle pin bolt 38 is inserted into and fastened to the inspection hole 15 of the cover 14 to be guided by being inserted into the central hole 41.

Reference numeral 10 in the accompanying drawings denotes a check valve, 16, 20, 32, and 37 are O-rings, and 21 is a stop ring.

Referring to the operation of the present invention configured as described above are as follows.

The check valve 10 according to the present invention has an inlet 12 by means of a backflow prevention means, that is, a housing 22, a check valve body 27, and a bracket 34, which are interposed between the inlet 12 and the outlet 13. ) To prevent the water flowing into the inlet 12 from the outlet 13 in accordance with the negative pressure generated inlet discharged to the outlet (13).

In other words, the check valve body 27 is elastically supported by the spring 33 and the head 28 of the check valve body 27 closes the check orifice 26 of the housing 22. When water flows into the 12) side and the pressure is applied to the check valve body 27, the check valve body 27 presses down the spring 33 by the pressure and opens the check orifice 26.

When the check orifice 26 is opened in this way, the water introduced into the inlet 12 passes through the guide hole 36 and the outlet orifice 11a of the check orifice 26 and the bracket 34 and is discharged to the outlet 13 side. do.

On the other hand, if a negative pressure is generated in the pipe line and the pressure at the outlet 13 side is greater than the pressure at the inlet 12 side, the water flows back from the outlet 13 side to the inlet 12 side, but at the outlet 13 side. The pressure applied is applied to the bottom face of the head 28 of the check valve body 27.

At this time, the check valve body 27 rises by the pressure, and the head 28 closes the check orifice 26, so that the back flow is blocked.

The lifting and lowering operation of the check valve body 27 is guide groove 31 of the tail 29 is guided to the guide rod 35 of the bracket 34, the outer periphery of the head 28 is the housing ( Since it is guided to the valve guide 25 of 22) even when turbulent phenomena appear when instantaneous strong pressure is applied stably operates without shaking.

On the other hand, in the case of checking for backflow during use, close the conduit on the inlet 12 side, and then release the inspection key bolt 17 fastened to the inspection hole 15 of the cover 14 to inspect it.

That is, when any one of the housing 22, the check valve body 27, the bracket 34, or the O-rings 32 and 37, which are the check adjusting means, operates normally without abnormality, the fluid discharge hole of the check key bolt 17 No water is discharged to 18.

In this case, after tightening the inspection key bolt 17 again, the inlet 12 side is opened.

However, when an abnormality occurs in any one of the housing 22 and the check valve body 27, the bracket 34, or the O-rings 32 and 37, water cannot flow into the fluid outlet hole 18 because the reverse flow cannot be blocked. Discharged.

At this time, the inspection key bolt 17 is fastened to the stop ring groove 19 protruding to the bottom surface of the cover 14 in the state of being fastened to the inspection hole 15 to check whether or not backflow Even if the tightening state is released, it is completely released and cannot be separated from the cover 14.

As a result of the check, it is confirmed that the water flows backward, the pipeline on the inlet 12 side and the outlet on the outlet 13 side are closed and the cover 14 is detached from the body 11, and then the housing 22, the check The parts in which an abnormality occurs in the valve body 27, the bracket 34, and the O-rings 32 and 37 are repaired or replaced.

At this time, in order to repair or replace any one or more of the housing 22, the check valve body 27, the bracket 34, O-rings (32, 37) and fastened to the body 11 by using a hand or a tool. The outer periphery of the housing 22 has to be grasped and rotated, but water is stuck in the housing 22, so it is slippery and difficult to detach.

However, the present invention, since the removable knob 23 is formed on the outer periphery of the housing 22, can be easily detached without slipping, and can be easily attached even after repair or replacement.

Meanwhile, in another embodiment of the present invention shown in FIG. 3, the central hole 41 is formed at the center of the bracket 40, so that the tail 29 of the check valve body 39 is the central hole 41. It is inserted into the guide to fasten the needle pin bolt 38 to the inspection hole 15 of the cover 14, the action is the same as the action of the present invention.

As described above, the present invention forms a detachable knob on the outer periphery of the housing installed inside the body, forms a valve guide on the inner periphery, and installs a check key bolt to check the reverse flow on the cover. It has high performance and function by preventing the reverse flow of the fluid discharged to the outlet, and it can easily check whether the reverse flow is prevented from the outside, and it is easy to detach and detach the housing, which makes it difficult to repair or replace parts. There is an effect that can be simple and easy without work.

In addition, the present invention can be installed in any position in the space coordinates, such as the complete backflow prevention function, horizontal installation, vertical installation, inclined installation, in addition to the above effects, and because of the angle shape, the number of parts in the pipeline installation work time It has excellent functional effects such as cost savings, strong load capacity and no noise and vibration.

Claims (3)

A cover 14 is coupled to an upper side of the body 11 having a side inlet 12 and a bottom outlet 13, and a housing 22, a check valve body 27, and a bracket inside the body 11. 34) In the check valve provided with the spring 33, A plurality of detachable knobs 23 formed on the outer circumferential edge of the housing 22 at regular intervals, an O-ring groove 24 formed below the detachable knob 23, and fixed to an inner circumference of the housing 22. Check valve for a water supply device characterized in that consisting of a plurality of valve guides 25 formed at intervals. The method of claim 1, Cover 14 is formed with a check key bolt 17 has a stop ring groove 19 is formed on the lower side and the fluid discharge hole 18 therein, and a check hole 15 into which the check key bolt 17 is inserted and fastened. Check valve for a water supply device characterized in that consisting of. The method of claim 2, A check valve for a water supply device, characterized in that the needle pin bolt 38 is fastened to the inspection hole 15 of the cover 14.