JPH06185645A - Check valve - Google Patents

Abstract

PURPOSE:To prevent the pressure of hot or cold water in a socket unit from making a check valve impart vibration to the hot or the cold water. CONSTITUTION:A check valve has a spindle guide 11 internally provided at the tip of the attaching part on a water discharging side of a socket unit, a spindle 12 which is supported at one end by the spindle guide 11 and slidingly guided in an axial direction between the spindle guide 11 and the valve seat 4a of the socket unit, and a valve body 15a which is provided at the other end of the spindle 12 and moved between a closing position for taking the valve seat 4a and an opening position for leaving the valve seat 4a with the movement of the spindle 12. The end part on an opposite side of the valve body 15a attached to the spindle 12 is arrangedly provided with a flow resistance member 20 to check the flow of the hot water. Thus the abnormal sound of an aqueduct piping can be prevented, and an unpleasant feeling is thereby not given to a user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve, and more particularly to improvement of the structure of a check valve provided in a tap for a tap such as a shower or a mixer tap.

[0002]

2. Description of the Related Art As a conventional check valve installed in a conventional water faucet of this type, there is a technique shown in FIGS.

FIG. 4 is a sectional view of a conventional check valve, and FIG.
FIG. 4 is a sectional view of a socket unit using a conventional check valve.

The check valve 60 of this type is installed in, for example, a shower for a bathroom, a mixing tap for a bathroom, a mixing tap for a kitchen, or the like. That is, as shown in FIG. 5, the socket unit 1 used for the mixing stopper has a water supply side attachment portion 3 at one end of the socket 2 screwed to and connected to a water supply side such as a water pipe, and the other end. It is used by screwing and connecting the water discharge side attachment part 4 to the water discharge side of a shower or the like, for sending tap water or the like from the water supply side attachment part 3 into the socket 2 and from the water discharge side attachment part 4 to the shower or the like. Hot water or water (hereinafter simply referred to as "hot water")
To supply. A check valve 60 is provided in the water discharge side attachment portion 4 of the socket unit 1 so as to prevent hot water from flowing back into the socket 2 from the water discharge side such as a shower.
The hot water in the socket 2 is allowed to pass only from the water discharge side attachment portion 4 to the water discharge side.

As shown in FIG. 4, in the check valve 60, a cylindrical spindle guide 61 is screwed and fixed to the inner peripheral surface on the tip side of the water discharge side mounting portion 4 of the socket unit 1, and the spindle guide The tip portion of the spindle 62 is inserted into the supporting portion 61a at the center of the spindle 61, and the spindle guide 6
1, the spindle 62 is guided in the axial direction of the water discharge side mounting portion 4 so that the spindle 62 can slide. The E-ring 6 is attached to the tip of the spindle 62 protruding from the spindle guide 61.
3 is fixed, and the E-ring 63 prevents the spindle 62 from being separated from the spindle guide 61 toward the base end side. A packing 65 is held between the flange 62a at the base end of the spindle 62 and a washer 64 via a washer 64, and a nut 67 is screwed on the tip side of the packing 65 of the spindle 62 via a washer 66. The packing 65 is fastened and fixed to the flange 62a.
Spindle 6 between spindle guide 61 and nut 67
A coil spring 68 is arranged around the periphery of the second member 2 and presses and urges the spindle guide 61 and the packing 65 in a direction in which they are separated from each other. As a result, the check valve 60 is always pressed by the coil spring 68, so that the packing 65 is always supported.
The valve body 65a constituted by the peripheral portion of the spring unit is elastically brought into pressure contact with the valve seat 4a constituted by the bottom surface of the base end of the water discharge side mounting portion 4 of the socket unit 1, and a pressure exceeding the pressing force of the coil spring 68 is applied. A washer 64 and a spindle 62 exposed in the socket 2 through the opening of the water discharge side mounting portion 4.
Valve seat 4a when applied to the surface of the flange 62a of
The valve body 65a is separated from the.

Next, the operation of the conventional check valve 60 constructed as above will be described.

When hot water is pumped and supplied from the water supply side mounting portion 3 of the socket unit 1 into the socket 2, a pressure is applied to the washer 64 and the like of the check valve 60 due to the pressure of the hot water supplied. When the pressing force of the coil spring 68 is exceeded, it resists the pressing force of the coil spring 68,
The packing 65 moves to the spindle guide 61 side, and the valve body 65a separates from the valve seat 4a of the water discharge side mounting portion 4. As a result, the valve body 65a opens the base end opening of the water discharge side attachment portion 4 and communicates with the inside of the socket 2, and the hot water in the socket 2 is supplied from the water discharge side attachment portion 4 to the water discharge side such as a shower.

On the other hand, when hot water flows backward from the water discharge side such as a shower to the base end side of the water discharge side mounting portion 4, pressure is applied to the washers 66 and the outer peripheral surfaces of the packing 65 by the hot water, so that the check valve The valve body 65a of 60 is urged toward the valve seat 4a of the water discharge side attachment portion 4 to be seated. Therefore, hot water from the water discharge side does not flow back into the socket 2 from the water discharge side attachment portion 4.

[0009]

The conventional check valve 60 is
With the above-described structure, when the hot and cold water pumped into the socket 2 has a predetermined minute flow rate and a predetermined pressure is applied to the surface of the washer 64 and the like of the check valve 60, the valve body 65 is provided.
Due to a so-called vibration phenomenon in which a is intermittently separated from or seated on the valve seat 4a according to the pressure, a so-called vibration phenomenon may cause the entire socket unit 1 to repeatedly vibrate and generate abnormal noise. Further, the abnormal noise of the socket unit 1 is transmitted from the socket unit 1 to the primary pipe of the water supply, the primary pipe structure becomes a resonance box, spreads over the entire water pipe, and a large noise may be generated in the entire building. Yes, in this case, the user is uncomfortable. This phenomenon is likely to occur particularly when each house adopts a similar piping structure, such as an apartment house or a condominium.

Therefore, an object of the present invention is to provide a check valve that is not affected by the pressure of hot water in the socket unit and does not give vibration to the hot water between the valve seat and the valve body. It is a thing.

[0011]

A check valve according to the present invention is a spindle guide provided inside a tap of a tap for water supply having a valve seat for passing hot water from a water supply side to a water discharge side. A spindle supported at one end by the spindle guide and axially moved and guided between the spindle guide and the valve seat; and a spindle provided at the other end of the spindle for moving the valve along with the movement of the spindle. A check valve including a valve body that is moved between a closed position that is seated on a seat and an open position that is separated from the valve seat, and a coil spring that applies a biasing force to the valve body toward the valve seat. In the above, a flow resistance member for obstructing the flow of hot and cold water is arranged at the opposite end of the valve element attached to the spindle.

[0012]

In the present invention, the valve body is biased by the coil spring toward the valve seat of the water faucet and assumes the closed position where it is seated on the valve seat. At this time, the elastic force of the coil spring presses the valve body against the valve seat. When hot water flows from the water supply side of the faucet to the water discharge side, and water pressure is applied to the valve body toward the water discharge side of the faucet, the valve body located on the water discharge side from the valve seat of the faucet will first move to the coil spring. Receives a drag force. When the water pressure applied to the valve body increases, the other side pressed by the coil spring separates from the valve seat, and the entire valve body enters an open state in which the valve seat is opened. During this time, when hot and cold water flows in the faucet, the dynamic pressure of the fluid is applied to the flow resistance member that inhibits the flow of hot and cold water according to the flow rate. The dynamic pressure applied to the flow resistance member weakens the elastic force of the coil spring and prevents the flow resistance member from vibrating in the fluid. Therefore, the valve body intermittently collides with the valve seat and causes abnormal noise. The vibration that would cause is not generated.

[0013]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 is a sectional view of a check valve according to an embodiment of the present invention in a closed state, and FIG. 2 is a sectional view of a check valve according to an embodiment of the present invention in an open state. In the drawings, the same reference numerals and symbols as those of the conventional example indicate the same or corresponding parts as those of the conventional example, and therefore, redundant description will be omitted here.

As shown in the figure, the check valve 10 of this embodiment
Like the check valve 60 of the conventional example, has a cylindrical spindle guide 11 that is screwed into the water discharge side mounting portion 4 of the socket unit 1. Unlike the conventional spindle guide 61, the spindle guide 11 is integrally formed with a regulating projection 11b extending toward the base end of the spindle 12 along the peripheral edge thereof, and the spindle 12 is slidable in the axial direction. The supporting portion 11c is integrally formed.

A rubber packing 15 is held by a spring guide 16 on the flange 12a side of the spindle 12, and the spring guide 16 is fitted in a recess 12b of the spindle 12 and engaged with a protrusion 12c. . That is,
From the end of the spindle 12 on the opposite side of the flange 12a, a rubber packing 15 is inserted, and a spring guide 16 is further inserted, so that the flange 12a and the spring guide 16 are inserted.
When a pressing force is applied between the spring guide 16 and the spring guide 16 over the projection 12c of the spindle 12 and fitted into the recess 12b, the pressing force is released and engaged with the projection 12c.

On the opposite side of the flange 12a of the spindle 12, a tip portion is inserted into a central supporting portion 11a of the spindle guide 11, the flow resistance member 20 is penetrated therethrough, and the E ring 13 is brought close to the flow resistance member 20. Is attached, and the spindle 12 is guided by the spindle guide 11 in the axial direction of the water discharge side attachment portion 4 so as to be slidable.

The flow resistance member 20 of the present embodiment is formed in a disk shape so as to have a fluid resistance that inhibits the flow of the hot water, and the dynamic pressure of the hot water is a plate of the disk resistance member 20. It is designed to be applied to the surface. However, the flow of hot and cold water is prevented from being greatly reduced by the plate-shaped flow resistance member 20.

A coil spring 18 is arranged around the spindle 12 between the spindle guide 11 and the spring guide 16 to press and urge the spindle guide 11 and the packing 15 in a direction in which they are separated from each other. It should be noted that the coil spring 18 is the protrusion 12 of the spindle 12.
The movement is restrained by being fitted to c. As a result, the check valve 10 becomes the coil spring 18
By the pressing force of, the valve body 15a constituted by the peripheral portion of the packing 15 is always elastically pressed against the valve seat 4a of the socket unit 1.

Next, the operation of the check valve 10 of the present embodiment constructed as described above will be explained.

First, when hot and cold water does not flow in the socket 2, the coil spring 18 of the check valve 10 presses the valve element 15a against the valve seat 4a of the socket unit 1 via the spring guide 16 to seat it. Set to the closed state. Also,
When hot water is pumped into the socket 2 from the water supply side attachment portion 3 of the socket unit 1, the pressure of the hot water supplied is applied to the washer 14 and the like of the check valve 10 from the supply side to the water discharge side. At this time, the coil spring 18
Is a drag force determined by its elastic force. Therefore, when hot and cold water starts flowing in the socket 2 and the flow rate is very small, the water pressure on the flange 12a or the like first causes the valve element 15a to move toward the spindle guide 11 side against the elastic force of the coil spring 18. , The valve body 15a is the water discharge side mounting portion 4
Away from the valve seat 4a side. As a result, the valve body 15a opens the water discharge side attachment portion 4, communicates with the inside of the socket 2, and a minute amount of hot water in the socket 2 is supplied from the water discharge side attachment portion 4 to the water discharge side such as a shower.

Further, the flow rate of the hot and cold water in the socket 2 increases, and the water pressure on the flange 12a and the like is increased by the coil spring 1.
When the elastic force of 8 is exceeded, the valve body 15a moves to the spindle guide 11 side against the pressing force of the coil spring 18, and the entire valve body 15a moves toward the valve seat 4a of the water discharge side mounting portion 4.
Further away from the to the open position. As a result, the valve body 15a opens all of the base end openings of the water discharge side mounting portion 4 and communicates with the inside of the socket 2, and the hot and cold water in the socket 2 is supplied from the water discharge side mounting portion 4 to the water discharge side such as a shower. To be done. Therefore, when the normal flow rate or the large flow rate of hot and cold water flows in the socket 2, the valve body 15a is the check valve 6 of the conventional example.
Similar to 0, it is in a fully opened state, so there is no obstacle to passage of hot water. On the other hand, when hot water flows backward from the water discharge side such as a shower to the base end side of the water discharge side attachment portion 4, pressure is applied to the outer peripheral surfaces of the spring guide 16 and the packing 15 by the hot water, so that the check valve 10 is operated. The valve body 15a is urged toward the valve seat 4a of the water discharge side mounting portion 4 to be seated.
Therefore, as in the conventional example, hot water from the water discharge side does not flow back into the socket 2 from the water discharge side attachment portion 4.

During this time, the dynamic pressure of the hot water is applied to the plate surface of the disk-shaped flow resistance member 20, and the flow resistance member 20 is affected by the dynamic pressure as the flow rate of the hot water increases, and the coil spring 18 is affected. It acts against the elastic force of, and consequently weakens the elastic force. Further, in response to the rapid movement and vibration of the flow resistance member 20, the hot and cold water acts as a viscous fluid to prevent the rapid movement and vibration of the flow resistance member 20.
Therefore, the valve seat 4a and the valve body 1 are initially formed when the hot water flows.
Even when the opening with 5a is not in the equilibrium position, the position of the valve body 15a gradually moves to the equilibrium position (release position),
During this time, the valve body 15a does not generate vibration. Therefore, even when a minute amount of hot and cold water, which has been a cause of the abnormal noise due to the intermittent collision between the valve body 15a and the valve seat 4a, flows through the socket 2, the valve body 15a has a sudden displacement. The valve body 15a is restrained, maintains an open state according to the flow rate of hot water, and allows hot water to pass therethrough.
Does not intermittently collide with the valve seat 4a.

In this way, the check valve 10 of the above embodiment is
The spindle guide 11 provided inside the tip of the water discharge side mounting portion 4 of the socket unit 1 and one end supported by the spindle guide 11 slides axially between the spindle guide 11 and the valve seat 4a of the socket unit 1. A valve body that is dynamically guided, and a valve body that is provided at the other end of the spindle 12 and that moves with the movement of the spindle 12 between a closed position that sits on the valve seat 4a and an open position that separates from the valve seat 4a. 15a, and a flow resistance member 20 that obstructs the flow of hot water is disposed at the opposite end of the valve body 15a attached to the spindle 12.

Therefore, in the above embodiment, the spindle 1
The flow resistance member 20 attached to the coil spring 1 is affected by the dynamic pressure of the hot water as the flow rate of the hot water increases, and
8 acts against the elastic force of 8 and consequently weakens the elastic force. Further, in response to the rapid movement and vibration of the flow resistance member 20, the hot and cold water acts as a viscous fluid to prevent the rapid movement and vibration of the flow resistance member 20. Therefore, even when the opening of the valve seat 4a and the opening of the valve body 15a are not in the equilibrium position at the beginning of the flow of the hot water, the position of the valve body 15a gradually moves to the equilibrium position (release position), and during this period, the valve body 15a does not generate vibration. As a result, there is no inconvenience that the abnormal noise is transmitted to the primary pipe of the water supply and vibrates to generate noise, which makes the user uncomfortable. Further, when the normal or large flow of hot and cold water flows in the socket unit 1 and when the hot and cold water flows backward from the water discharge side mounting portion 4 to the water supply side mounting portion 3, the check valve 10 is the reverse of the conventional example. It functions smoothly like the stop valve 60. Furthermore, since the flow resistance member 20 may be attached to the spindle 12, the overall structure does not become particularly complicated. Also, the entire structure can be easily performed as in the conventional example, and the manufacturing cost is not increased.

By the way, the flow resistance member 20 of the present embodiment.
Is formed in a disc shape so as to have a fluid resistance that hinders the flow of the hot water, and the flow of the hot water is not greatly reduced by the plate-shaped flow resistance member 20. However, the flow resistance member 20 when implementing the present invention
As shown in the partial front view of the flow resistance member used in the check valve of another embodiment of the present invention shown in FIG.
The outer circumference of 1 may be a streamline 21a along the flow of hot and cold water. As a result, it is possible to suppress the generation of the Karlman vortex downstream of the flow resistance member 21 and reduce the fluid resistance of the flow resistance member 21. In particular, even if the flow resistance member 21 of the present embodiment is easy to move in one direction, the fluid resistance is high in the movement in the other direction, so that the same effect as that of the above embodiment can be expected. In this embodiment, the caulking 12e is used as a means for attaching the flow resistance member 21 to the end of the spindle 12.

That is, the flow resistance member for carrying out the present invention does not matter the shape and the type of mounting means.

[0028]

As described above, the check valve of the present invention includes a spindle slidably supported by a spindle guide provided in a water faucet and axially movable, and one end of the spindle. A valve element that is provided and is movable between a closed position where it sits on the valve seat and an open position where it disengages from the valve seat when the spindle moves, and a biasing force that directs the valve element toward the valve seat. And a coil spring for imparting
Moreover, a flow resistance member for inhibiting the flow of hot water or water is provided at the other end of the spindle.

Therefore, when water pressure is applied to the valve body toward the water discharge side of the faucet, the valve body positioned on the water discharge side of the valve seat of the faucet first resists the elastic force of the coil spring. Then, it separates from the valve seat and opens the valve seat. At this time, as the flow rate of the hot water increases, the flow resistance member is affected by its dynamic pressure and acts against the elastic force of the coil spring,
As a result, the elastic force is weakened. Further, in response to the abrupt movement and vibration of the flow resistance member, the hot and cold water acts as a viscous fluid to prevent the abrupt movement and vibration of the flow resistance member.
Therefore, the valve body is restrained from its abrupt displacement, maintains the open state according to the flow rate of hot and cold water, and allows passage of hot and cold water, so the valve body intermittently gives vibration to the hot water or water. And no abnormal noise is generated. As a result, there is no inconvenience that the abnormal noise is transmitted to the primary pipe of the water supply and vibrates to generate noise, which gives the user uncomfortable feeling.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a check valve in a closed state according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an open state of a check valve according to an embodiment of the present invention.

FIG. 3 is a partial front view of a flow resistance member used in a check valve according to another embodiment of the present invention.

FIG. 4 is a sectional view of a conventional check valve.

FIG. 5 is a sectional view of a socket unit using a conventional check valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket unit (water faucet) 4a Valve seat 11 Spindle guide 12 Spindle 15a Valve body 18 Coil spring 20,21 Flow resistance member

Claims (1)

[Claims] 1. A spindle guide provided inside a tap for water having a valve seat for passing hot water or water from a water supply side to a water discharge side; and a spindle guide slidably supported by the spindle guide and movable in an axial direction. A spindle, and a valve element provided at one end of the spindle, the valve element being movable between a closed position seated on the valve seat and an open position separated from the valve seat with the movement of the spindle; Is provided with a coil spring that applies a biasing force toward the valve seat, and a flow resistance member that is provided at the other end of the spindle and that inhibits the flow of hot water or water.