JPH053767U - Check valve built-in piping equipment - Google Patents

Abstract

(57) [Summary] [Structure] A valve body 11 for opening and closing a valve hole 10 formed in the flow passage in the water stopper case 3 is provided, and the check valve 2 is built in the downstream side of the flow passage. A strainer 1 for removing impurities contained in the fluid between the valve hole 10 and the check valve unit 2.
8 built-in. [Effect] The impurities contained in the fluid can be removed by the strainer, the function of the check valve can be prevented from deteriorating, and the durability and reliability thereof can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 This invention relates to a check valve built-in plumbing device used for piping fluids such as water.

[0002]

[Prior Art]

 Conventionally, as shown in FIG. 4, a check valve 2 for preventing backflow is simply built in a downstream passage of a plumbing fixture such as a water stopcock 1.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional piping device with built-in check valve, impurities contained in the fluid flow to the check valve 2 side as they are, so that impurities adhere to the inside of the check valve 2 and become the inlet of the check valve. There is a problem that impurities are trapped in the sealing surface between the valve body that opens and closes it and the check function is reduced.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a check valve built-in piping device capable of preventing impurities contained in a fluid from flowing to the check valve side. .

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, this invention adopts a means of incorporating a check valve in a case forming a flow path and providing a strainer on the upstream side of the check valve.

[0006]

[Action]

 According to the present invention, by taking the above means, when the fluid flows to the downstream side, the strainer removes impurities contained in the fluid and flows to the check valve side. For this reason, since a fluid without impurities is supplied to the check valve, impurities are not caught in the seal surface between the inlet of the check valve and the valve body, and the check function can always be maintained. .

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, one end opening of a check valve unit 4 which also has a built-in check valve unit 2 is screwed into one end opening of a case 3 of a water stopcock 1 which constitutes a piping device. It is fixed. The other end opening of the water stopcock case 3 is an inlet 5, and the other end opening of the check valve case 4 is an outlet 6. An upper storage cylinder portion 7 is integrally formed on an upper portion of the water shutoff case 3, a valve seat 8 is integrally formed inside, and a lower storage cylinder portion 9 is integrally formed on a lower portion. A valve hole 10 is provided in the center of the valve seat 8 and a valve body 11 is accommodated in the upper portion of the valve hole 10 in correspondence with the valve hole 10. The valve body 11 is fastened and fixed by a bolt 15 to the lower end surface of an operating rod 14 having a screw portion 13 screwed into a screw hole 12 formed in the inner peripheral surface of the upper housing cylinder portion 7. Then, by rotating the bundle 16 attached to the upper outer end of the operation rod 14, the valve body 11 is moved up and down to open and close the valve hole 10. A lid 17 is screwed onto the upper end of the upper storage cylinder 7 via a seal member.

A strainer 18 for removing impurities contained in the fluid is accommodated below the valve seat 8, and the strainer 18 is supported by a lid body 17 screwed and fixed to the lower storage cylinder 9. Has been done.

Next, the check valve unit 2 will be described with reference to FIG. A valve body support 22 is fitted and fixed to the right end opening of the valve housing 21 of the check valve unit 2. A seat surface 24 is formed inside the inlet 23 provided at the left end opening of the valve storage portion 21. Further, an annular groove 25 is formed on the outer peripheral surface of the valve housing portion 21, and an O-ring 26 is fitted therein. The O-ring 26 is brought into contact with the inner peripheral surface of the check valve case 4 to maintain the sealing property.

An outlet 27 is formed in the valve body support portion 22, and a valve body 29 that opens and closes the seat surface 21 of the inlet 23 is stored in a valve chamber 28 formed in the valve storage portion 21. . The valve body 29 is formed by a head portion 30 and a shaft portion 31, and the shaft portion 31 is guided by a guide hole 22a formed in the central portion of the valve body supporting portion 22. An annular groove 32 is formed on the outer circumference of the head portion 30, and an O-ring 33 is fitted therein. The O-ring 33 comes into contact with the seat surface 24 to prevent the reverse flow of the fluid. A guide projection 34 is formed on the head portion 30, and a coil-shaped compression spring 36 is interposed between the head portion 30 and the valve body support portion 22. Then, the head 30 is constantly pressed and biased in the closing direction of the inlet 23.

The water stopcock 1 configured as described above is provided in the middle of the water pipe 41 as shown in FIG. 3, and for example, hot water supplied from the water heater 42 can be supplied to the floor heating device 43 side. ing.

Now, FIG. 1 shows a state in which the valve hole 10 is closed by the valve body 11 and the inlet 5 side is pressurized. In this state, when the handle 16 is operated to separate the valve body 11 from the valve seat 8 and the valve hole 10 is opened, the fluid flows into the strainer 18 through the valve hole 10 and is contained in the fluid by the strainer 18. The impurities are removed and supplied to the check unit 2 side. Therefore, impurities are not caught between the valve body 29 of the check valve unit 2 and the seat surface 24, and the check function of fluid is not hindered.

The impurities accumulated in the strainer 18 may be removed by removing the strainer 18 to the outside by opening the lid 19. Further, the invention is not limited to the above-mentioned embodiment, and for example, the valve body 11 may be a sphere, the invention may be embodied in various kinds of piping devices, etc., without departing from the scope of the invention. It can be changed and embodied.

[0014]

[Effect of the device]

 As described above in detail, this device can remove impurities contained in the fluid by the strainer, and as a result, suppress the inflow of impurities to the check valve and prevent the check function from deteriorating. Thus, there is an effect that durability and reliability can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a water stopcock embodying the present invention.

FIG. 2 is an enlarged sectional view of a check valve unit.

FIG. 3 is a schematic circuit diagram showing the entire apparatus.

FIG. 4 is a cross-sectional view of a conventional water stopcock.

[Explanation of symbols]

1 stopcock, 2 check valve unit, 3 stopcock case,
4 check valve cases, 8 valve seats, 10 valve holes, 11 valve bodies,
14 control rods, 18 strainers.

Claims (1)

[Claims for utility model registration] [Claim 1] A check valve built-in pipe in which a check valve is built in a case forming a flow path, and a strainer is provided upstream of the check valve. Equipment.