JPH07302123A - Reducing valve for city water - Google Patents

Abstract

PURPOSE:To set up a reducing valve for city water without securing any setup space nor any pipeline construction. CONSTITUTION:A pipe type case 1 contains an opening 1a linking the primary side at one of its both axial end sides and an opening 1b linking the secondary side at the other axial end side. Then the case 1 has such a shape that can be put into the body of a water tool such as a stop valve connected to a water supply pipeline, etc. A uniaxial reducing valve A consists of a valve seat 4 placed at the primary side, a cylindrical valve 3 which moves in the axial direction against the seat 4, a sealing member 8 which makes the valve 3 pierce slidably through an axial core part and seals up airtight the outer circumferential side of the valve 3 to the primary side, a pressure sensitive body 2 which is connected to the valve 3 in a body or virtually in a body and moves in the axial direction by the pressure-sensitive action of the pressure of the secondary side, and a spring 6 which pushes out the body 2 toward the secondary side. Then pressure reduction function part of the valve A is stored in the case 1 and then set into the body of the water tool like a stop valve, etc., in a cartridge shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure reducing valve (constant pressure valve) for tap water used to reduce the pressure of tap water to a predetermined pressure, and in a valve box formed in a pipe shape, A pressure receiving body that senses and operates the pressure on the secondary side is provided, and a spring that pushes out to the secondary side is connected to the pressure receiving body, and it faces the valve seat provided on the valve box on the front end side facing the primary side. The present invention relates to an improvement of a tap water pressure reducing valve in the form of a uniaxial pressure reducing valve that is configured by mounting a tubular valve body that does.

[0002]

2. Description of the Related Art Since the pressure of tap water has been increased with the rise of buildings, it is difficult to control the discharge amount by directly using this high-pressure tap water.
In addition, there is a problem that the water hammer phenomenon becomes serious. For this reason, a pressure reducing valve (constant pressure valve for water supply) is installed at a place where each household enters from a water main to a branch pipe, and high-pressure tap water is often used as a pressure of ² to 3 kg / cm ^2. ing. Especially in high-rise apartments,
Use of this pressure reducing valve for tap water is required to eliminate the pressure difference between the upper floor and the lower floor.

By the way, the conventional pressure reducing valve A for tap water used in this way is disclosed in, for example, Japanese Patent Laid-Open No. 62-62.
To be more specific about what is disclosed in Japanese Patent Publication No. 065, FIG.
As shown in FIG. 1, a pressure sensitive body 2 formed in a tubular shape so as to move axially by sensing the pressure on the secondary side y of the case 1 is incorporated into the case 1 which is a valve box formed in a pipe shape. The base end side of the valve body 3 of the cylindrical side seal valve is connected to the front end side of the pressure sensitive body 2 facing the primary side w, and the valve seat 4 facing the open end edge of the front end of the valve body 3 is provided. The valve seat fitting 5 for holding the
A spring 6 that is integrally assembled to the secondary side y and pushes the pressure sensitive body 2 to the secondary side y in the outer peripheral portion of the valve body 3 of the tubular side seal valve in the case 1. It is installed in a spring chamber z that is formed so as to be shielded from the side w, and the spring chamber z is communicated with the outside of the case 1 through a communication hole 10.
By forming the connecting cylinder portions 11 and 12 at the end portion of the secondary side w and the end portion of the secondary side y, respectively, a configuration of a uniaxial pressure reducing valve is formed.

As a result, the connecting cylinders 11 and 12 are
When tap water is supplied from the primary side w in a state in which is connected to the primary side w piping and the secondary side y piping, the pressure on the secondary side y reaches a predetermined pressure, resulting in pressure sensing. Body 2
Is pushed into the primary side w against the bias of the spring 6, and the opening end edge 30 of the front end of the cylindrical valve body 3 continuing to the front end side of the pressure sensitive body 2 collides with the valve seat 4. Then, the cylindrical side wall surface of the valve body 3 blocks the communication between the primary side w and the secondary side y so that the pressure on the secondary side y is maintained at a predetermined pressure set in the spring 6. I am doing it.

Further, the conventional pressure reducing valve A for tap water thus constructed is based on a large pressure reducing valve used for a boiler or the like and has a different set pressure. Therefore, not only is the size large and the cost high, but firstly, the sealability of the valve is poor, and secondly, when the flow rate is changed from a small flow rate to a large flow rate, and from a large flow rate to a small flow rate. There are problems that the hysteresis with respect to the flow rate change when the flow rate is changed is bad, and thirdly, the pressure change on the secondary side is large with respect to the flow rate change.

From this, when constructing the pressure reducing valve A for tap water, the applicant has, as shown in FIG. 2, a connecting cylinder portion 11 connected to the primary side w on one end side and the other end side on the other end side. Secondary y
A tubular pressure receiving body 2 that moves in the axial direction by a pressure change on the secondary side y is fitted in a pipe-shaped valve box 1 having a connecting tubular portion 12 connected to the secondary side y. A portion of the case 1 which is biased toward the primary side in the case 1 is provided with a valve body 3 formed in a cylindrical side seal valve on the front end side of the pressure sensitive body 2 facing the primary side w. In addition, a valve seat fitting 5 for holding the valve seat 4 that abuts against the opening end edge 30 of the front end of the cylindrical valve body 3 is formed separately from the case 1, and is movably fitted in the axial direction of the case 1. The valve seat fitting 5 is mounted at a predetermined position by a stop ring a for preventing movement to the primary side and a spacer b for suppressing movement to the secondary side, and the valve seat fitting 5 A small gap D is provided between the valve seat fitting 5 and the spacer b so that the valve seat fitting 5 has a degree of freedom. Watertight holding member 7 interposed between the inner peripheral surface of the outer peripheral surface and the casing 1 of the pressure sensitive element 2 fitted movably direction
Is fitted into an annular groove c formed on the inner peripheral surface of the case 1, and the outer peripheral surface of the pressure sensitive body 2 is formed into a smooth surface.
The cylindrical wall 3a of the valve body 3 of the cylindrical side seal valve mounted on the front end side of the pressure sensitive body 2 which is movably fitted in the case 1 in the axial direction,
The opening edge 3 at the front end is formed with a wall thickness of 1 mm or less.
A means for forming the end surface of No. 0 into a semicircular arc surface in a side cross section has been developed, and is filed as Japanese Patent Application No. 6-27398.

[0007]

The above-described pressure reducing valve A for tap water is available in either the conventional form shown in FIG. 1 or the improved type developed by the applicant shown in FIG. However, since it is used by connecting to the pipe as a single pressure reducing valve, the number of pressure reducing valves will increase by one, and space will be required for this increasing pressure reducing valve. As shown in FIGS. 3 and 4, the pipe B between the stop valve stv and the water meter M is cut and the pressure reducing valve A is connected thereto, or the stop valve stv and the water tap are connected. Since the middle of the pipe B between C and C is cut and the pressure reducing valve A is assembled there, it becomes necessary to connect the pressure reducing valve A to the pipe B during the piping work. There's a problem.

The present invention has been made in order to solve the problems occurring in the above-mentioned conventional means and preceding means, and provides a pressure reducing valve for tap water and a space for assembling it. It is an object of the present invention to provide a new means that can be assembled without requiring piping work.

[0009]

As a means for achieving the above-mentioned object, the present invention provides one shaft end side.
A pipe-shaped case having an opening communicating with the secondary side and an opening communicating with the secondary side on the other shaft end side is fitted into the body of a water appliance such as a stop valve connected to a water supply pipe. It is formed into a shape that can be installed by
A valve seat located on the primary side, a tubular valve that moves in the axial direction facing the valve seat, and a tubular valve that slidably penetrates through an axial center portion so that the outer circumferential side of the tubular valve is 1 A sealing material that airtightly shuts off to the secondary side, a pressure sensitive body that moves in the axial direction by a pressure sensing operation of the secondary side that is integrally or integrally connected to the tubular valve, and that pressure sensitive body is placed on the secondary side. We propose a pressure reducing valve for tap water, characterized in that the pressure reducing function part of a one-shaft type pressure reducing valve consisting of a pushing-out spring is stored and assembled in a cartridge shape to be installed in the body of a water appliance such as a stop valve. It is a thing.

[0010]

In the pressure reducing valve A for tap water according to the present invention constructed as described above, the case 1 for accommodating the pressure reducing mechanism v in the form of a cartridge does not have the connecting cylinder for connecting to the pipe B. The case 1 is inserted into the body 90 of the water appliance such as the stop valve stv connected to the pipe B, and in that state, the body 90 of the water appliance such as the stop valve stv.
By connecting the connection tubular portion 91 of No. 1 to the pipe B, the pipe is connected to the pipe B. Therefore, the pressure reducing valve A is connected to the pipe B.
Therefore, the labor for piping work for connecting to the pressure reducing valve A can be saved, and the space for disposing the pressure reducing valve A is also unnecessary.

[0011]

Embodiments Next, embodiments will be described in detail with reference to the drawings. The same reference numerals are used for the constituent elements having the same effect as those of the conventional means.

FIG. 5 is a vertical sectional side view of a pressure reducing valve A for tap water embodying the present invention. In FIG. 5, 1 is a pipe-shaped case, v is a pressure reducing function portion housed in the case 1, and 2 is a pressure reducing. Pressure-sensitive body of functional part v, 3 is a tubular valve of the functional part v in the same as above, 4 is a valve seat of the functional part in the same v, 5 is a valve seat fitting of the functional part in the same v, 6 is a spring in the functional part in the v Indicates a sealing material for the functional part v.

The case 1 is formed of a metal material into a pipe shape, and an opening 1a communicating with the primary side w is opened on one shaft end side, and the other shaft end side with respect to the secondary side. The opening 1b for communicating with each other is open.

On the inner peripheral side of the case 1, in the vicinity of the opening 1b communicating with the secondary side y, the outer edge of the pressure sensitive body 2 on the side facing the secondary side y abuts. The step portion 1c is formed by bending the edge of the case 1 on the side of the opening 1b. Further, at a portion closer to the primary side w than the stepped portion 1c, the pressure sensitive body sliding portion 1d for sliding the outer peripheral side of the pressure sensitive body 2 is provided.
However, it has an inner diameter corresponding to the outer diameter of the pressure sensitive body 2. Further, an outer end portion of the primary side of a sealing material 8 formed in a disc shape having a larger diameter than the pressure sensitive body 2 is abutted with an end portion of the pressure sensitive body sliding portion 1d on the primary side w. The step portion 1e is formed by expanding the cylindrical wall of the case 1. Also, this step 1
A portion 1f closer to the primary side w than e is formed to have an inner diameter corresponding to the outer diameter of the sealing material 8 formed in a large-diameter disc shape,
Before assembling the pressure reducing function part v into the case 1, the edge of the primary side w is formed in a form in which the portion 1f corresponding to the outer diameter of the sealing material 8 is extended.

The pressure sensitive body 2 is formed in a ring shape having an outer diameter corresponding to the inner diameter of the pressure sensitive body sliding portion 1d formed on the inner peripheral side of the case 1 and having a through hole 20 at the center thereof. The base end side of the tubular valve 3 is fitted into the through hole 20 at the center thereof and is integrally connected.

The cylindrical valve 3 is of a normal shaft cylindrical shape in which the outer peripheral surface of the cylindrical wall serves as a side seal valve, and the base end side thereof is integrated with the through hole 20 in the central portion of the pressure sensitive body 2 as described above. Connected to the primary side w
An opening edge 30 on the front end side that faces toward is formed in the valve portion that faces the valve seat 4. The tubular valve 3 may be formed of a metal material forming the pressure sensitive body 2 so as to be integrally continuous with the pressure sensitive body 2.

The seal member 8 has an outer diameter of a step portion 1e of the case 1.
A through hole 80, which is formed in a disk shape corresponding to the inner diameter of the portion 1f closer to the primary side w and which penetrates in the front and rear (axial direction) in the central portion, slides on the cylindrical valve 3 described above. It is opened so that it can be freely inserted, and a spring seat for supporting one end side of the spring 6 is formed on the end surface on the rear surface side (secondary side y).

The valve seat 4 is an ordinary seat formed of a flexible material such as a synthetic resin material, and is formed in a ring shape corresponding to the opening edge 30 on the front end side of the tubular valve 3 to form a valve seat fitting. 5
It is attached to. The valve seat fitting 5 is formed in a disk shape having an outer diameter corresponding to the inner diameter of the portion 1f formed by the primary side w of the case 1 described above, and is located at the outer peripheral side of the valve seat 4 to be held. A water passage 50 is opened through the front and rear, and a ring-shaped abutment 51 protruding rearward is formed at an outer edge portion on the rear surface side facing the secondary side y.

Therefore, the pressure-sensitive body 2, the cylindrical valve 3 connected to the pressure-sensitive body 2, the spring 6 for pushing the pressure-sensitive body 2 to the secondary side y, the seal member 8, and the valve seat fitting 5 for holding the valve seat 4 and the like. Are inserted in that order into the case 1 through the opening 1a on the primary side w of the case 1.

Then, the outer end side of the pressure sensitive body 2 abuts on the step portion 1c, the outer end side of the secondary side y of the seal member 8 abuts on the step portion 1e, and the abutment 51 of the valve seat fitting 5 is attached. Primary side w of the sealing material 8
When it comes into a state of abutting against the end surface of the valve seat metal 5, hold it in that state, bend the edge of the opening 1a of the primary side w of the case 1 and crimp it to the end surface of the valve seat fitting 5 on the primary side w. Append 1
g, fix in the above state. As a result, the pressure sensitive body 2
A change in the pressure on the secondary side y controls the spring pressure of the spring 6 to move the cylindrical valve 3 integrally or integrally connected to the pressure sensitive body 2 back and forth with respect to the valve seat 4 to reduce a predetermined pressure. A pressure reducing valve A that operates is assembled.

The pressure reducing valve A assembled in this way is
As shown in FIG. 4, the stop valve stv is provided in the pipe B.
When connecting a water appliance such as a water meter or a water meter M, an opening 1a on the primary side w of the case 1 in which the decompression function part v is incorporated inside is provided in the inner cavity of the body 90 of the water appliance.
An O-ring, etc., which is inserted in a posture facing the upstream side of the flow in the pipe B and is previously assembled on the inner peripheral surface of the body 90 between the outer peripheral surface of the case 1 and the inner peripheral surface of the body 90. The seal member 92, 92 is interposed to keep the seal 90 watertight and airtight, and the pipe B is connected to the connecting tubular portion 91, 91 of the body 90, so that the pressure reducing valve A is attached to the pipe B. To do.

At this time, a communicating hole 10 provided in the case 1 is inserted into a portion of the body 90 located in the middle of the seal members 92, 92, which are assembled in advance so as to be pressed against the outer peripheral surface of the case 1. Air holes 93 are provided to allow air to flow in and out of the body 90. The body 90 is the body of a water meter M, for example.

[0023]

As described above, in the pressure reducing valve A for tap water according to the present invention, the pressure reducing function part v is incorporated in the case 1 to assemble into a cartridge, and the stop valve stv connected to the pipe B, etc. Case 1 in the body 90 of the water appliance
Because I am trying to assemble it by fitting it together,
The pressure reducing valve A can be connected to the pipe B without the trouble of piping work for connecting the pressure reducing valve A to the pipe B.
Can be connected to the pipe B without exposing the outside to the outside and without specially preparing a space for arrangement.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a pressure reducing valve for tap water according to conventional means.

FIG. 2 is a vertical sectional side view of a pressure reducing valve for tap water according to the preceding means.

FIG. 3 is a perspective view showing a state in which the pressure reducing valve of the conventional means is connected to a pipe.

FIG. 4 is a vertical cross-sectional side view of another connection mode of the pressure reducing valve of the above-mentioned means to the pipe.

FIG. 5 is a vertical sectional side view of a pressure reducing valve for tap water according to the means of the present invention.

FIG. 6 is a partially cutaway side view showing a state in which the pressure reducing valve is connected to a pipe of the same.

[Explanation of symbols]

A: pressure reducing valve for tap water, B: water supply pipe, C: water tap, D
... Gap, M ... Meter, a ... Stop ring, b ... Spacer, c ... Annular groove, stv ... Stop valve, v ... Decompression function part, w ... Primary side, y ... Secondary side, z ... Spring chamber 1 ...
Cases 1a, 1b ... Openings, 1c ... Steps, 1d ... Pressure sensitive body sliding section, 1e ... Steps, 1f ... Sites, 1g ... Caulking,
Reference numeral 10 ... Communication hole, 11.12 ... Connection cylindrical portion, 2 ... Pressure sensitive body, 2
0 ... through hole, 3 ... tubular valve, 3a ... tubular wall, 30 ... opening edge,
4 ... Valve seat, 5 ... Valve seat fitting, 50 ... Water passage, 51 ... Abutment,
6 ... Spring, 7 ... Watertight holding member, 8 ... Sealing material, 80 ... Through hole, 90 ... Body, 91 ... Connection cylinder part, 92 ... Sealing member, 93 ... Air hole.

Claims (2)

[Claims] 1. A pipe-shaped case (1) having an opening (1a) communicating with the primary side (w) on one shaft end side and an opening (1b) communicating with the secondary side (y) on the other shaft end side. Piping B
A valve seat 4 located on the primary side and an axial direction facing the valve seat 4 are formed in the case 1 so as to be fitted and incorporated into the body of a water appliance such as a stop valve stv connected to the A tubular valve 3 that moves in the axial direction, a sealing material 8 that slidably penetrates the axial center portion of the tubular valve 3 to hermetically shut the outer peripheral side of the tubular valve 3 to the primary side, and a tubular valve One-shaft pressure reducing valve including a pressure-sensitive body 2 that is integrally or integrally connected to 3 and moves in the axial direction by a pressure sensing operation on the secondary side, and a spring 6 that pushes the pressure-sensitive body 2 to the secondary side. Store the decompression function part v of
A pressure reducing valve for tap water, characterized by being assembled in a cartridge shape to be incorporated into the body of a water supply appliance such as a stop valve stv. 2. A step portion for preventing the case 1 from coming off at an inner peripheral side thereof in the vicinity of an opening 1b communicating with the secondary side and abutting against an outer end portion of the pressure sensitive body 2 on the secondary side. 1c is formed, and a pressure sensitive body sliding portion 1d having an inner diameter corresponding to the outer diameter of the pressure sensitive plate 2 is formed at a portion closer to the primary side than the stepped portion 1c. A sealing material 8 having a diameter larger than that of the pressure sensitive plate 2
A step portion 1e that abuts against the outer end portion of the secondary side of the seal member 8 is formed so that the inner diameter of the portion 1f on the primary side of the step portion 1e is the outer diameter of the sealing material 8. In addition, a pressure sensitive plate 2 in which a cylindrical valve 3 is integrally or integrally connected to a shaft core portion from an opening 1a on a primary side thereof, a spring 6 for pushing the pressure sensitive plate 2 to a secondary side, and a shaft core portion. The seal member 8 that is airtightly fitted to the outer periphery of the tubular valve 3 by the through hole 80 that is opened at the same time, and the valve seat fitting 5 having the valve seat 4 facing the tubular valve 3 are inserted in that order. hand,
The pressure reducing valve for tap water according to claim 1, which is assembled in the case 1 by caulking an edge portion of the opening 1a on the primary side of the case 1.