JPH08145236A - Counterpressure pressure damping valve - Google Patents

Abstract

PURPOSE: To provide a counterpressure reducing valve by which counterpressure generated by a water hammer phenomenon can be damped so that an apparatus on an upstream side in a water pipe, etc., can be prevented from being damaged by the cause of this counterpressure. CONSTITUTION: A counterpressure reducing valve is provided with a housing 1 in which a valve chamber 6 is arranged between an inflow opening 4 and an outflow opening 5, a valve seat 7 is arranged in the inflow opening side end part of the valve chamber 6 and a stopper 9 is set in the outflow side end part of the valve chamber 6, a valve body 13 which is inserted in the valve chamber 6, can freely reciprocated between the valve seat 7 and the stopper 9, and closes a valve hole 12 when seated on the valve seat 7, a steady channel 15 which communicates the inflow opening 4 and the outflow opening 5 to each other through the valve hole 12, and a pressure relieving channel 16 which communicates the inflow opening 4 and the outflow opening 5 to each other through a pressure relieving hole 17 arranged in the housing 1 or the valve body 13. Pressure boss in the pressure relieving channel 16 is set larger than that in the steady channel 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back pressure damping valve which is installed in a fluid passage such as a water pipe or a hot water supply pipe to damp back pressure generated in these passages.

[0002]

2. Description of the Related Art In recent years, in a washbasin or a bathroom, a faucet is changing from a conventional screw type valve (a type that twists the faucet) to a single lever (a type that pulls out one lever to bring out water) However, with a single lever, the flow of water is suddenly cut off due to its structure. Therefore, a high back pressure is generated at the faucet due to the water hammer phenomenon, which may damage the equipment on the upstream side.

[0003]

In view of the above points, the present invention is capable of attenuating the back pressure generated by the water hammer phenomenon, and the back side device is damaged due to the back pressure. It is an object of the present invention to provide a back pressure damping valve designed to prevent the above. It is not limited to water pipes or hot water supply pipes, but is installed in a wide variety of fluid flow paths.
It is an object of the present invention to provide a back pressure damping valve capable of damping back pressure generated in these flow paths.

[0004]

To achieve the above object, a back pressure damping valve of the present invention has a valve chamber provided between an inlet and an outlet, and a valve seat is provided at an end of the valve chamber on the inlet side. And a housing provided in a stopper at the outlet side end portion of the valve chamber, and inserted into the valve chamber, reciprocally movable between the valve seat and the stopper, and when seated on the valve seat. A valve body that closes the valve hole, a steady flow path that connects the inflow port and the outflow port through the valve hole, and the inflow port through a pressure relief hole provided in the housing or the valve body And a pressure relief channel communicating with the outlet, and the pressure loss in the pressure relief channel is set to be larger than the pressure loss in the steady channel.

[0005]

The back pressure damping valve of the present invention having the above construction operates as follows. The valve body is constantly pressed by the fluid pressure and is in contact with the stopper,
The valve body is separated from the valve seat, the valve hole is opened, and the steady flow path is opened. Therefore, the fluid is smoothly supplied through the steady flow path having a relatively small pressure loss. When a back pressure is generated When a back pressure is generated, the valve body is pushed by this back pressure and moves toward the inlet, seats on the valve seat, and the steady flow path is closed. Therefore, the counter pressure is sent to the upstream side only through the pressure relief passage, and is effectively attenuated when passing through the pressure relief passage having a relatively large pressure loss. When the fluid is supplied again and the back pressure disappears, the fluid is pushed by the pressure of the fluid and moves toward the outlet until the valve body comes into contact with the stopper.

That is, the back pressure damping valve of the present invention secures a flow path such as a water pipe or a hot water supply pipe which has a small pressure loss in a steady state, and moves from downstream to upstream such as a water hammer phenomenon. When a back pressure is generated, the steady flow path is closed, and the generated back pressure is sent upstream from the pressure relief flow path with a large pressure loss to attenuate the back pressure.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings.

First Embodiment: As shown in FIGS. 1 and 2, an inlet 4 is provided at an end of a housing 1 having a substantially cylindrical shape.
And the outflow port 5 are provided symmetrically, and the valve chamber 6 is provided between the inflow port 4 and the outflow port 5. The housing 1 is formed by fitting or screwing a cap 3 having an outlet 5 to the inner circumference of the end of a housing body 2 having an inlet 4 and a valve chamber 6, and the inlet 4 and the outlet 5 Such a combination is used in order to make the valve chamber 6 larger in diameter.

A valve seat 7 is provided at the end of the valve chamber 6 on the inlet side, and a stopper 9 is provided at the end of the valve chamber 6 on the outlet side. The valve seat 7 is constituted by an annular rubber-like elastic material sealer 8 fitted or bonded to the housing body 2, and has a high outer height so that a ball-shaped valve body 13 described later can be easily seated. It is formed in a tapered shape. The inner peripheral side of the valve seat 7 is a valve hole 12. The stopper 9 is the cap 3
And a stopper member 1 made of a rubber-like elastic material having a poppet shape and supported by the support portion 10.
And the flow paths 15 and 16 described later.
The support portion 10 is formed in a crosslinked shape so as not to block the above.

A ball-shaped valve element 13 is inserted in the valve chamber 6. The valve body 13 is adapted to linearly reciprocate between the valve seat 7 and the stopper 9 along eight guide ribs 14 provided on the peripheral wall of the valve chamber 6, and is seated on the valve seat 7. In this case, the valve hole 12 is closed, but even if it abuts on the stopper 9, the flow path around the stopper member 11 is not closed.

Further, the back pressure damping valve is provided with a steady flow path 15 which connects the inflow port 4 and the outflow port 5 through a valve hole 12 and an inflow port through a pressure relief hole 17 provided in the housing body 2. 4 is provided with a pressure relief flow channel 16 that communicates with the outlet 5. The pressure loss in the latter pressure relief flow channel 16 is set to be larger than the pressure loss in the former steady flow channel 15. Two depressurization holes 17 are provided at 180-degree symmetrical positions. The pressure relief channel 16 is set to have a large pressure loss by the following configuration. a. Small opening cross-sectional area. b. The flow path is long. c. The flow path is bent in the middle. Especially, it is bent sharply. d. It is tapered toward the upstream. e. Flows from two directions collide with each other at the flow path outlet.

Details of the paths of the flow paths 15 and 16 are as follows. Steady flow path 15 ... Inflow port 4-> valve hole 12-> valve chamber 6-> eight groove-shaped flow paths 18 between housing 1 and valve body 13 (between guide ribs 14)-> outer circumference of stopper member 11-> flow Exit 5. Depressurization flow path 16 ... Outlet 5 → stopper member 11 outer circumference → valve chamber 6 → two groove-shaped flow paths 18 → two pressure release holes 17 →
Inlet 4.

The back pressure damping valve having the above structure operates as follows. Constantly As shown in FIG. 1, the valve body 13 is pressed by the fluid pressure to abut the stopper 9, the valve body 13 is separated from the valve seat 7, and the valve hole 12 is opened. Road 15 is open. Therefore, this steady flow path 1 with relatively small pressure loss
Through 5, the fluid is smoothly supplied. At the time of occurrence of back pressure When a back pressure is generated from the steady state, the back pressure is pushed by this back pressure to move the valve body 13 in the direction of the inflow port, and as shown in FIG. Is closed. Therefore, the counter pressure is sent to the upstream side only through the pressure relief channel 16, and the pressure relief channel 16 with relatively large pressure loss.
Is effectively dampened as it passes through. When the fluid is supplied again and the back pressure disappears, the fluid is pushed by the pressure of the fluid and moves in the outlet direction until the valve element 13 comes into contact with the stopper 9.

Therefore, if the back pressure damping valve is installed, the back pressure generated by the water hammer phenomenon or the like can be effectively damped without hindering the smooth supply of the fluid in the steady state. It is possible to prevent the upstream device from being damaged due to this back pressure.

Second Embodiment: As shown in FIGS. 4 and 5, the inlet 4 is provided at the end of the housing 1 having a substantially cylindrical shape.
And the outflow port 5 are provided symmetrically, and the valve chamber 6 is provided between the inflow port 4 and the outflow port 5. The housing 1 is formed by fitting or screwing a cap 3 having an outlet 5 to the inner circumference of the end of a housing body 2 having an inlet 4 and a valve chamber 6, and the inlet 4 and the outlet 5 Such a combination is used in order to make the valve chamber 6 larger in diameter.

A valve seat 7 is provided at the end of the valve chamber 6 on the inlet side, and a stopper 9 is provided at the end of the valve chamber 6 on the outlet side. The valve seat 7 is composed of a sealer 8 made of a rubber-like elastic material which is fitted or adhered to the housing main body 2 and has an annular shape. The sealer 8 is formed in a substantially U-shaped cross section and has an annular hollow portion 19. In addition, it has excellent cushioning performance and sealing performance. The inner peripheral side of the valve seat 7 is a valve hole 12. The stopper 9 is constituted by a stopper member 11 made of a rubber-like elastic material and having a ring shape fitted or adhered to the cap 3.

A valve body 13 having a cylindrical shape and having a tapered end portion on the inlet side is inserted into the valve chamber 6. The valve body 13 includes eight guide ribs 1 provided on the peripheral wall of the valve chamber 6.
4, it reciprocates linearly between the valve seat 7 and the stopper 9, and when the valve seat 7 is seated with a taper, the valve hole 12 is closed, but even if it abuts on the stopper 9. In order not to block the channel, a required number of cutout-shaped channels 20 (for example, eight locations in accordance with a groove-shaped channel 18 described later) are provided at the end portion on the outlet side.

A steady flow path 15 which connects the inflow port 4 and the outflow port 5 through a valve hole 12 and a pressure release hole 17 provided in the valve body 13 are connected to the back pressure damping valve. 4 is provided with a pressure relief flow channel 16 that communicates with the outlet 5. The pressure loss in the latter pressure relief flow channel 16 is set to be larger than the pressure loss in the former steady flow channel 15.
The pressure release channel 16 has a large pressure loss because the channel is narrowed upstream in accordance with the above-described taper.

Details of the paths of the flow paths 15 and 16 are as follows. Steady flow path 15 ... Inflow port 4-> valve hole 12-> valve chamber 6-> eight groove-shaped flow paths 18 between housing 1 and valve body 13 (between guide ribs 14)-> required number of notch-shaped flow The passage 20 → the outlet 5 is used as a main flow passage, and the sub-passage is used as an inlet 4 → valve hole 1
2-> valve chamber 6-> pressure relief hole 17-> outlet 5. Depressurization flow path 16 ... Outflow port 5-> valve chamber 6-> inner circumference of valve body 13-> pressure release hole 17-> inflow port 4.

The back pressure damping valve having the above structure operates as follows. As shown in FIG. 4, the valve body 13 is pressed against the pressure of the fluid to contact the stopper 9, the valve body 13 is separated from the valve seat 7, and the valve hole 12 is opened. Road 15 is open. Therefore, this steady flow path 1 with relatively small pressure loss
Through 5, the fluid is smoothly supplied. When Back Pressure Occurs When a back pressure is generated from the steady state, the back pressure is pushed by this back pressure and the valve body 13 moves in the direction of the inflow port, and as shown in FIG. Is closed. Therefore, the counter pressure is sent to the upstream side only through the pressure relief channel 16, and the pressure relief channel 16 with relatively large pressure loss.
Is effectively dampened as it passes through. When the fluid is supplied again and the back pressure disappears, the fluid is pushed by the pressure of the fluid and moves in the outlet direction until the valve element 13 comes into contact with the stopper 9.

Therefore, if the back pressure damping valve is installed, the back pressure generated by the water hammer phenomenon or the like can be effectively damped without hindering the smooth supply of the fluid in the steady state. It is possible to prevent the upstream device from being damaged due to this back pressure.

[0022]

The present invention has the following effects.

That is, according to the back pressure damping valve of the present invention having the above-mentioned structure, the steady flow passage for supplying the fluid and the pressure relief flow passage for back pressure damping having a larger pressure loss than the steady flow passage. Since the and are provided side by side, the back pressure generated by the water hammer phenomenon or the like can be effectively damped without hindering the smooth supply of the fluid in the steady state. It is possible to prevent the equipment on the upstream side from being damaged. Further, it is not limited to a water pipe or a hot water supply pipe, but it can be installed in a wide variety of fluid passages to attenuate the back pressure generated in these passages.

[Brief description of drawings]

FIG. 1 is a sectional view of a back pressure damping valve according to a first embodiment of the present invention, which is a sectional view taken along the line B-O-B in FIG.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view showing an operating state of the reverse pressure damping valve.

4 is a cross-sectional view of the back pressure damping valve according to the second embodiment of the present invention, which is a cross-sectional view taken along the line D-O-D in FIG.

5 is a cross-sectional view taken along the line CC in FIG.

FIG. 6 is a sectional view showing an operating state of the reverse pressure damping valve.

[Explanation of symbols]

 1 Housing 2 Housing Main Body 3 Cap 4 Inlet 5 Outlet 6 Valve Chamber 7 Valve Seat 8 Sealer 9 Stopper 10 Supporting Part 11 Stopper Member 12 Valve Hole 13 Valve Disc 14 Guide Rib 15 Steady Flow Path 16 Pressure Release Flow Path 17 Pressure Release Hole 18 Groove shaped channel 19 Hollow part 20 Notched channel

Claims (1)

[Claims] 1. A valve chamber (6) is provided between an inlet (4) and an outlet (5), and a valve seat (7) is provided at an inlet end of the valve chamber (6). A housing (1) provided on a stopper (9) at the outlet side end of the chamber (6), and the valve chamber (6)
A valve element (13) inserted into the valve seat (7) and reciprocally movable between the valve seat (7) and the stopper (9) and closing the valve hole (12) when seated on the valve seat (7). , The valve hole (1
A steady flow path (15) communicating the inflow port (4) and the outflow port (5) through the (2), and a depressurizing hole (17) provided in the housing (1) or the valve body (13). And a pressure relief channel (16) communicating the inflow port (4) with the outflow port (5) via the pressure relief channel (16).
The back pressure damping valve is characterized in that the pressure loss in 1 is set to be larger than the pressure loss in the steady flow path (15).