JPH0534371U - Piping equipment with built-in check valve - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent backflow in water pipes. [Structure] A check valve 6 is installed inside a casing forming a flow path, and the check valve 6 allows a flow in a certain direction, but blocks the flow in the opposite direction. As a result, it is possible to prevent the backflow of the fluid.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a piping device with a built-in check valve used for piping of a fluid circuit such as water.

[0002]

[Problems to be solved by conventional techniques and devices]

 When the plumbing equipment was used in a water purifier or dishwasher, a backflow could occur in the equipment, resulting in an unsanitary condition.

An object of the present invention is to provide a piping device with a built-in check valve capable of solving the above-mentioned conventional problems and easily preventing the backflow of fluid.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, this invention adopts a means of incorporating a check valve in a casing forming a flow path.

[0005]

[Action]

 According to the present invention, by taking the above means, the fluid flowing in from one direction is allowed to pass by the check valve, but is blocked in the opposite direction. As a result, it is possible to prevent the backflow of the fluid.

[0006]

【Example】

 An embodiment embodying the present invention will be described below with reference to FIGS. FIG. 1 embodies the present invention in a joint 1 which is continued in the middle of a piping system. The joint 1 is one in which a main pipe 2 and a sub pipe 3 are screwed and fixed by a screw portion 7, and has an inlet portion 4 and an outlet portion 5. A check valve 6 is built in between.

FIG. 2 and FIG. 3 embody this invention in a water stopcock 8. A pipe 10 is screwed and fixed by a threaded portion 11 to the outlet of the water shutoff plug body 9. Further, the check valve 6 is located between the main body 9 and the step portion 2a. The difference between FIG. 2 and FIG. 3 is only that the threaded portion at the outer end portion of the pipe 10 is different between male and female.

As shown in FIG. 4, the valve body support portion 13 is fitted and fixed to the right end opening portion of the valve housing portion 12 of the check valve 6. A seat surface 15 is formed inside the inlet 14 provided at the left end opening of the valve housing 12. Further, an annular groove 16 is formed on the outer peripheral surface of the valve accommodating portion 12, an O-ring 17 is fitted therein, and the O-ring 17 is brought into contact with the inner peripheral surface of the sub pipe 3 to enhance the sealing performance.

An outlet 18 is formed in the valve body support portion 13, and a valve body 20 for opening and closing the seat surface 15 of the inlet 14 is stored in a valve chamber 19 formed in the valve storage portion 12. The valve body 20 is formed by a head portion 21 and a shaft portion 22, and the shaft portion 22 is guided by a guide hole 13a formed in the central portion of the valve body supporting portion 13. An annular groove 23 is formed on the outer periphery of the head portion 21, an O-ring 24 is fitted therein, and the O-ring 24 is brought into contact with the seat surface 15 to prevent backflow of fluid. A guide protrusion 25 is formed on the head portion 21, and a compression spring 26 is interposed between the head portion 21 and the valve body support portion 13 in a coil shape. Then, the head portion 21 is constantly pressed and biased in the closing direction of the inlet 14.

Therefore, in the piping device shown in FIGS. 1 to 3 configured as described above, since the check valve 6 is built in, the backflow is prevented and an unsanitary situation is prevented. It can be prevented.

[0011]

[Effect of the device]

 As described above in detail, the present invention can prevent the backflow of the fluid flowing in from one direction by incorporating the check valve in the piping device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a piping device embodying the present invention in a joint.

FIG. 2 is a cross-sectional view of a piping device embodying the present invention as a water stopcock.

FIG. 3 is a cross-sectional view of a piping device embodying the present invention as a water stopcock.

FIG. 4 is an enlarged sectional view of a check valve unit.

[Explanation of symbols]

 6 ... Check valve.

Claims (1)

[Scope of utility model registration request] 1. A pipe fitting with a built-in check valve, wherein a check valve (6) is built in a casing forming a flow path.