JP2002055721A - Pressure reducing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce any uncomfortable flowing sound generated at the time of stopping a pressure reducing valve for opening and closing a water channel between a primary channel and a secondary channel. SOLUTION: A pressure reducing valve 7 having a primary channel 9 and a secondary channel 12 at the both edges in members 8 and 11 is provided with a parting member 15 fixed inside for parting the primary channel 9 from a pressure chamber 26, a valve body 19 formed so as to be water-tightly sliding between a through-hole 16 formed at the parting member 15 and the secondary channel 12, and formed with a flow channel 25 communicating the primary channel 9 with the secondary channel 12, and formed with the pressure chamber 26 between itself and the separating member 15, a spring 27 arranged in the pressure chamber 26 for energizing the valve body 19 toward the secondary channel 12, and a valve seat 29 for interrupting the flow from the primary channel 9 to the secondary channel 12 when the valve body 19 is seated according as the pressure of the secondary channel 12 is made higher than that of the primary channel 9. An action chamber 28 is formed between the valve body 19 and an inner wall 11a of the member 11, and a small hole 24 communicating with the action chamber 28 is formed at the valve body 19, and the valve body 19 to be energized by the spring 27 with water to be supplied from the flow channel 25 of the valve body 19 through the small hole 24 to the action chamber 28 is allowed to slide to the valve seat 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is, for example, mounted on a shower hose that connects a faucet to a shower head, and a button provided on the shower head opens and closes a flow path from the primary side to the secondary side. It relates to a pressure reducing valve.

[0002]

2. Description of the Related Art Conventionally, water discharged from a shower head is not only opened and closed by a handle of a water faucet but also can be switched by a button provided on the shower head. 1 and FIG. 3 (FIGS. 6 and 7 of the present application) of Japanese Unexamined Patent Publication No. Hei 10-118533. 6 and 7, the faucet 51 installed in a bathroom or the like can switch the water discharge flow path to a callan 53 and a shower port 54 by a switching handle 52. And a shower head 68 is connected to the pressure reducing valve 55 via a shower hose 67.
Is provided with an open / close button 70 for opening / closing the open / close valve 69. The pressure reducing valve 55 is connected to a casing 56 through an inlet 57 communicating with the shower port 54 and a shower hose 6.
An outlet 58 communicating with the air passage 7 is formed, and a flow path 59 through which water passes is formed between the inlet 57 and the outlet 58. In the flow path 59, the inside of the sheet portion 60 and the inside of the casing 56 slide. A movable valve element 61 is accommodated, and the valve element 61 is
In the water-flowing state by the urging force of the spring 64 inserted in the space 66 between the valve body 5 and the space 5, the water is separated from the seat portion 60, and the water passes through the water passage 62 of the valve body 61 from the flow path 59.

Accordingly, when the on-off valve 69 is opened by the on-off button 70 of the shower head 68, the valve body 61 of the pressure reducing valve 55 is separated from the seat portion 60 by the urging force of the spring 64, so that water is discharged from the shower head 68. Is discharged, and when the on-off valve 69 is closed by the on-off button 70, the water pressure in the shower hose 67 rises, and the water pressure applied from the inside of the shower hose 67 to the annular flange portion 63 formed on the valve body 61 increases the valve pressure. The body 61 contracts a spring 64 inserted in a space 66 between the guide 65 and the seat 61 and seats on the seat portion 60, thereby blocking water flow from the flow path 59 to the water passage 62 of the valve body 61. is there.

In the above-mentioned apparatus, when water is discharged from the shower head by using an open / close button while the water is being discharged, the flow of the water flowing vigorously in the shower hose is suddenly stopped, and the water pressure in the shower hose rises. However, since the pressure reducing valve closes instantaneously against the urging force of the spring due to the water pressure applied to the flange portion of the valve body, there is a problem that unpleasant water flow is likely to occur.

[0005]

An object of the present invention is to provide an unpleasant flow of water generated when a pressure reducing valve for opening and closing a water flow path between a primary flow path and a secondary flow path is stopped. It is to reduce sound.

[0006]

SUMMARY OF THE INVENTION According to the present invention,
A pressure reducing valve having a primary flow path and a secondary flow path at both ends in a member is partitioned into a primary flow path and a pressure chamber by a partition member fixed inside, and a through hole formed in the partition member and a secondary flow path are formed. A valve body that forms a pressure chamber between the passage and a partition member, wherein the valve body is disposed in the pressure chamber; And a valve body is seated when the pressure in the secondary flow path rises above the primary flow path to shut off water flow from the primary flow path to the secondary flow path. A working chamber is formed between the valve body and the inner wall of the member, a small hole communicating with the working chamber is formed in the valve body, and the small hole is supplied to the working chamber from the water passage of the valve body. The valve body urged by the spring by the water to be slidable toward the valve seat.

According to a second aspect of the present invention, a pressure reducing valve having a primary flow path and a secondary flow path at both ends in a member is partitioned into a primary flow path and a pressure chamber by a partition member fixed inside, and a hole is formed in the partition member. A valve body that slides water-tightly between the provided through hole and the secondary flow path, forms a water passage that communicates the primary flow path and the secondary flow path, and forms a pressure chamber between the partition member and the water passage. A spring disposed in the pressure chamber for urging the valve body toward the secondary flow path, and a valve body sliding toward the primary flow path when the pressure of the secondary flow path rises above the primary flow path. It is provided with a valve seat that is seated to block water flow to the secondary flow path, and a throttle member having a tapered surface that narrows a gap with the valve body is attached to the valve seat.

According to a third aspect of the present invention, a pressure reducing valve having a primary flow path and a secondary flow path at both ends in a member is partitioned into a primary flow path and a pressure chamber by a partition member fixed inside, and a hole is formed in the partition member. A valve body that slides water-tightly between the provided through hole and the secondary flow path, forms a water passage that communicates the primary flow path and the secondary flow path, and forms a pressure chamber between the partition member and the water passage. A first spring disposed in the pressure chamber for urging the valve body toward the secondary flow path, and a valve sliding toward the primary flow path when the pressure of the secondary flow path rises above the primary flow path A valve seat is provided for the body to sit on and shut off water flow to the secondary flow path, and the pressure chamber contains a second spring having a shorter spring constant than the first spring and having a different spring constant.

According to a fourth aspect of the present invention, the primary flow path communicates with a faucet flow path, and the secondary flow path communicates with a shower head provided with a water flow / stop water switching button via a shower hose. It is attached between the faucet and the shower head.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. In this embodiment, as shown in FIG. 1, a water faucet 1 attached to a wall surface of a bathroom or the like is such that a switching handle 2 switches a flow path of water to a water discharge pipe 3 and a shower hose 4. 1 and shower hose 4
Between them, a pressure reducing valve 7 of the present invention is mounted, and a shower head 5 is connected to a tip of the shower hose 4. The shower head 5 has a switching button 6 that can switch between water discharge and water stoppage. I have.

As shown in FIGS. 2 and 3, the pressure reducing valve 7 is formed by screwing and connecting a cylindrical first member 8 and a second member 11 to each other so that an internal flow passage through which water passes is formed by the first member. A partition member 15 screwed and fixed to the inner peripheral surface of the partition member 8 to partition the primary flow path 9 and the pressure chamber 26, and slide through a through hole 16 formed in the partition member 15 in a water-flowing direction; The water flow path is narrowed between the valve seats 29 fixed to the primary flow path 9, so that the water supplied from the primary flow path 9 to the secondary flow path 12 can be reduced to a predetermined pressure. When the switching button 6 of the shower head 5 is operated, the valve body 19 is separated from or seated on the valve seat 29, so that the state is switched to the water-passing or water-stopping state.

The valve element 19 is cylindrical, and the inner peripheral surface of the second member 11 having the first seal member 13 accommodated between the partition member 15 and the secondary flow path 12 is watertight. A main body 20 that slides and a cylindrical main body 2 having a smaller diameter than the main body 20;
A first cylindrical portion 22 that protrudes from both ends of the first seal member 0 and slides water-tightly through the through hole 16 of the partition member 15 that houses the third seal member 17 on the inner peripheral surface, and a second seal member 14 on the inner peripheral surface. A second sliding water-tightly on the inner peripheral surface of the accommodated secondary flow path 12
The valve body 19 includes a cylindrical portion 23, which is formed inside the valve body 19 by passing through a water passage 25 through which the primary flow passage 9 and the secondary flow passage 12 communicate with each other. A spring 27 for urging the valve element 19 in a direction away from the valve seat 29 is housed in a pressure chamber 26 formed in a watertight manner therebetween. The pressure chamber 26 is formed by an air hole 11 b formed in the second member 11. The main body 20 of the valve body 19 and the inner wall 11a of the second member 11 communicate with the outside.
Between them, an action chamber 28 facing the pressure chamber 26 is formed on the outer periphery of the second cylindrical portion 23.

The working chamber 28 is connected to the secondary flow path 12 by the valve element 1.
9, the second cylinder portion 23 and the second seal member 14 maintain watertightness, and the pressure chamber 26 maintains watertightness by the main body portion 20 of the valve body 19 and the first seal member 13. A small hole 24 having a small diameter formed in the peripheral surface communicates with the water passage 25 of the valve element 19. Water is supplied from the water passage 25 little by little through the small hole 24, and the water pressure increases as the volume of the working chamber 28 increases. Acts on the annular flange portion 21 formed on the main body portion 20 of the valve body 19, contracts the spring 27 accommodated in the pressure chamber 26, and slides the valve body 19 so as to be in close contact with the valve seat 29. Things. At this time, the moving speed of the valve body can be adjusted by the diameter of the small hole, and the smaller the diameter, the slower the operation and the lower the sound of water flow. The number of small holes is not limited to one, and a plurality of small holes may be formed.

The valve seat 29 is connected to a cylindrical and annular support member 32 by a shaft 34, and the outer periphery of the support member 32 has the first shape.
The mesh 36 of the strainer 35 housed inside the female screw portion 10 of the first member 8 by the fixing member 37 is interposed in the water hole 33 of the support member 32 by being tightly fixed between the member 8 and the partition member 15. The valve seat 29 and the valve body 19
In order to reduce the sound of water passing between the first cylindrical portion 22 and the end surface of the first cylindrical portion 22, a throttle member 30 having a tapered surface 31 capable of narrowing the flow path is mounted, and the water passage 25
The flow rate of the water supplied to the primary flow path 9 is reduced along the tapered surface 31 immediately before stopping the water, so that the water can pass smoothly without a sudden change in the flow.

In the above configuration, when the switching handle 2 of the faucet 1 is at the water discharging position from the shower head 5 and the switching button 6 of the shower head 5 is operated to the water discharging position, the switching handle 2 moves between the faucet 1 and the shower hose 4. As shown in FIG. 2, the installed pressure reducing valve 7 communicates with the outside via the shower hose 4 and the shower head 5, and the secondary passage 12 communicates with the outside. Reference numeral 19 denotes a secondary flow path 12 which is urged by a spring 27 housed in a pressure chamber 26.
, And the tip of the first cylindrical portion 22 is separated from the valve seat 29. Therefore, the water passes through the water passage 25 of the valve body 19 and is discharged from the shower head 5 at the tip of the shower hose 4.

Next, when the switching button 6 of the shower head 5 is switched to the water stop position from this state, the internal pressure in the shower hose 4 and the secondary flow path 12 of the pressure reducing valve 7 rises, and The water passing through the water passage 25 of the body 19 gradually enters the working chamber 28 from the small hole 24 of the second cylindrical portion 23. As a result, the pressure water entering the working chamber 28 slightly increases and acts on the flange portion 21 of the valve body 19, so that the pressure chamber 2
The spring 27 housed in the valve body 6 is contracted and the tip of the valve body 19 is slid so as to come into close contact with the valve seat 29, and the valve body 1 is slid.
Since the distal end of the nozzle 9 remains seated on the valve seat 29, the flow of water from the primary flow path 9 to the secondary flow path 12 is shut off, and the discharge of water from the shower head 5 is stopped. At this time, since the water supplied from the water passage 25 of the valve body 19 to the primary flow passage 9 smoothly passes along the tapered surface 31 of the throttle member 30, the water flow noise can be reduced.

Next, another embodiment of the present invention will be described with reference to FIGS. The pressure reducing valve 7a of this embodiment is different from the above embodiment in the configuration of the valve body and the pressure chamber. That is, the valve element 40 is shown in FIG.
As in the prior art shown in FIG. 1, an annular pressure receiving surface 41 facing the secondary flow path 12 is formed, and the internal pressure generated in the shower hose 4 acts on the pressure receiving surface 41 so that the valve body 40
9 or by being seated, it can be switched to a water-passing or water-stop state.
1 in the pressure chamber 42 formed between the valve seats 29 and 29.
A first spring 43 biasing in a direction away from the first spring 43, and a second spring 43 having a shorter overall length and a smaller diameter than the first spring 43.
The second housing 44 accommodates the spring 44 concentrically and accommodates it inside.
The spring 44 is shorter than the first spring 43 housed outside and has a lower spring constant. Therefore, the urging force of the second spring 44 does not act on the valve body 40 when water is flowing, but pressurized water acts on the pressure receiving surface 41 of the valve body 40 when water is stopped,
The valve body 40 contracts the first spring 43 and the valve seat 29.
, The first spring 43
The urging force of the second spring 44 having a shorter overall length and a lower spring constant is applied, so that the first spring 43
By adding the urging force of the second spring 44 to the urging force of (1) to further reduce the moving speed immediately before stopping the water, the water flow noise can be reduced. Since other configurations are the same as those of the previous embodiment, the same components are denoted by the same reference numerals and detailed description will be omitted.

[0018]

According to the first aspect of the present invention, when the water is stopped, the water supplied from the water passage of the valve body through the small hole increases the volume of the working chamber and contracts the spring of the pressure chamber to open the valve body. Since the seat is seated and water is supplied from the water passage to the working chamber little by little from the small hole, the movement of the valve body is slow, and an unpleasant water noise is not generated.

According to the second aspect, when the water is stopped, the water in the water passage of the valve element flows into the primary flow passage along the tapered surface of the throttle member, so that there is no sudden change in the flow passage, and unpleasant water flow noise is generated. do not do.

According to the third aspect, the urging force of the second spring is added to the urging force of the first spring immediately before stopping water to further reduce the moving speed of the valve body, so that unpleasant water flow noise is not generated. .

[Brief description of the drawings]

FIG. 1 is an overall view of a faucet equipped with a pressure reducing valve of the present invention.

FIG. 2 is a cross-sectional view of the pressure reducing valve in a water flowing state.

FIG. 3 is a sectional view of a pressure reducing valve in a water stop state.

FIG. 4 is a cross-sectional view of a pressure reducing valve according to another embodiment in a water flowing state.

FIG. 5 is a cross-sectional view of a pressure reducing valve according to another embodiment in a water stop state.

FIG. 6 is an explanatory view of a conventional technique, and is a cross-sectional view of a pressure reducing valve.

FIG. 7 is an explanatory view of a conventional technique, and is an overall view of a faucet equipped with a pressure reducing valve.

[Explanation of symbols]

 Reference Signs List 1 faucet 4 shower hose 5 shower head 6 switching button 7, 7a pressure reducing valve 8 first member 9 primary flow path 11 second member 11a inner wall 12 secondary flow path 15 partition member 16 through hole 19, 40 valve body 24 small Hole 25 Water passage 26, 42 Pressure chamber 27 Spring 28 Working chamber 29 Valve seat 30 Throttle member 31 Tapered surface 43 First spring 44 Second spring

Claims (4)

[Claims] A pressure reducing valve having a primary flow path and a secondary flow path at both ends in a member is partitioned into a primary flow path and a pressure chamber by a partition member fixed inside, and a through hole formed in the partition member. A water passage that slides water-tightly between the hole and the secondary flow path to communicate the primary flow path and the secondary flow path, and that forms a pressure chamber between the partition member and the pressure chamber; And a spring that biases the valve body toward the secondary flow path, the valve body is seated when the pressure of the secondary flow path rises above the primary flow path, and the primary flow path moves from the primary flow path to the secondary flow path. A valve seat for blocking water flow of the valve body, forming a working chamber between the valve body and the inner wall of the member, forming a small hole communicating with the working chamber in the valve body, and forming a small hole from the water passage of the valve body. A valve body urged by the spring with water supplied to the action chamber to slide toward a valve seat. 2. A pressure reducing valve having a primary flow path and a secondary flow path at both ends in a member is partitioned into a primary flow path and a pressure chamber by a partition member fixed inside, and a through hole formed in the partition member. A water passage that slides water-tightly between the hole and the secondary flow path to communicate the primary flow path and the secondary flow path, and that forms a pressure chamber between the partition member and the pressure chamber; A spring is disposed on the valve and biases the valve body toward the secondary flow path, and a valve body that slides toward the primary flow path when the pressure of the secondary flow path rises above the primary flow path is seated. A pressure reducing valve comprising: a valve seat for blocking water flow to a secondary flow path; and a throttle member formed with a tapered surface for narrowing a gap between the valve body and the valve seat. 3. A pressure reducing valve having a primary flow path and a secondary flow path at both ends in a member is partitioned into a primary flow path and a pressure chamber by a partition member fixed inside, and a through hole formed in the partition member. A water passage that slides water-tightly between the hole and the secondary flow path to communicate the primary flow path and the secondary flow path, and that forms a pressure chamber between the partition member and the pressure chamber; And a valve spring that urges the valve body toward the secondary flow path and slides toward the primary flow path when the pressure of the secondary flow path rises above the primary flow path. And a valve seat for shutting off the flow of water to the secondary flow path.
A pressure reducing valve characterized by containing a spring. 4. The primary flow path communicates with a faucet flow path.
4. The method according to claim 1, wherein the next flow path communicates with a shower head provided with a button for switching between water passage and water stoppage through a shower hose, and is mounted between the faucet and the shower head. The pressure reducing valve as described.