JP2001330171A - Uniaxial pressure reducing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a uniaxial pressure reducing valve preventing an occurrence of a secondary water hammer without deteriorating its sensitiveness. SOLUTION: In this uniaxial pressure reducing valve, a partition wall or a valve seat fitting is provided so as to partition a primary side and a secondary side inside a body, a check hole communicating the primary side with the secondary side is opened, aside from a water port opened in the partition wall or the valve seat fitting, in a portion of the partition wall or the valve seat fitting facing a water passage of an inner cavity of a pressure regulating valve, a check valve seat is provided in a wall face in the primary side of the partition wall around this check hole, and a check valve is provided so as to face this check valve seat from the primary side of the partition wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a uniaxial pressure reducing valve connected to a connecting portion of a water supply / hot water supply device for reducing the pressure of tap water, which has been increased in pressure, to an easy-to-use water pressure. When the on-off valve of the device is rapidly closed, the pressure regulating valve of the single-shaft pressure reducing valve is rapidly closed to reduce secondary water hammer generated by using the single-shaft pressure reducing valve as a source. The present invention relates to a water hammer reducing device.

[0002]

2. Description of the Related Art As shown in FIG. 1, a conventional single-shaft pressure reducing valve A is formed from a metal material or the like into a cylindrical shape having connection ports 10 and 11 at both ends in the axial direction. The part is bisected in the axial direction to form a first half 1a connected to the primary side X and a second half 1b connected to the secondary Y, and these are integrally connected by screw fitting to form a valve box. A body 1 is assembled, and a partition wall 2 that separates the primary side X and the secondary side Y is provided at a position near the primary side X of the lumen of the body 1,
A water inlet 20 is formed at a peripheral portion thereof, and a valve chamber a is formed in a lumen of a body portion of the body 1 closer to the secondary side Y than the partition wall 2. A cylindrical pressure regulating valve 3 serving as an inner water passage 30 is inserted, and a cylindrical valve 3a formed in a side seal valve shape is installed at an end thereof toward a primary side X. The valve seat 4 opposed to the valve 3a is formed of an elastic material such as synthetic rubber into an annular shape corresponding to the cylindrical valve 3a, but is formed into an appropriately shaped disk, and the secondary of the partition wall 2 described above is formed. A valve seat fitting (not shown) that is attached to a valve seat mounting portion that is installed at the center of the side wall or that is separately formed
By mounting the valve seat on the partition wall 2, the valve seat 4 is positioned on the partition wall 2 or on the secondary side of the valve seat so as to face the cylindrical valve 3 a. And fixedly attached to the body 1, and a pressure-sensitive plate 3 b whose diameter is increased in a flange shape in the outer peripheral direction is integrally connected to the secondary-side end of the pressure regulating valve 3, and the pressure-sensitive plate 3 b is attached. The spring 5 urges the secondary side Y to push it out.

[0003] As a result, water guided from a water supply pipe (water pipe) connected to the primary side X passes through the partition wall 2 or the water inlet 20 provided in the peripheral portion of the valve seat fitting, and is connected to the valve seat 4. The water is supplied to the secondary side Y from a valve port formed between the cylindrical valve 3a and the water through the water passage 30 in the lumen of the pressure regulating valve 3.

When the pressure on the secondary side Y increases, the force applied to the pressure-sensitive plate 3b (pressure × the area of the pressure-receiving surface of the pressure-sensitive plate 3b) increases. The pressure sensitive plate 3b is pushed out to the primary side X, and the pressure regulating valve 3 integrally connected to the pressure sensitive plate 3b is pushed out to the primary side X, as shown in FIG. The opening degree of the valve port formed between the valve and the secondary side is reduced, and the pressure on the secondary side Y is maintained at the set pressure. When the pressure on the secondary side Y exceeds the set pressure, the cylindrical valve is opened. The valve 3a is pressed against the valve seat 4 to close the valve and shut off the flow of water to the secondary side Y.

Further, in order to reduce the secondary water hammer generated by the single-shaft pressure reducing valve as a source when the pressure adjusting valve of the single-shaft pressure reducing valve is suddenly closed, the present invention is applied to a single-shaft pressure reducing valve. Developed by the applicant and filed in Japanese Patent Application
There is a means filed as Japanese Patent Application No. 1-131830.

As shown in FIGS. 3 and 4, this means is provided at a rear end side of a cylindrical pressure regulating valve 3 which is inserted into a valve chamber a of a bore of a body 1 of a single-shaft pressure reducing valve. A cylindrical portion u is provided to fit into a secondary channel w formed on the rear end side of the lumen of the body 1, and an outer peripheral surface of the cylindrical portion u and a secondary side into which the cylindrical portion u is fitted. A narrow gap v for restricting the flow of water to the pressure-sensitive chamber z communicating with the secondary flow path w is provided on a fitting surface between the inner peripheral surface of the flow path w and a cylindrical pressure regulating valve. 3 pressure-sensitive plate 3b
A rapid pressure change from the secondary side Y with respect to the pressure is difficult to propagate, so that it is difficult for the water pressure of the pressure regulating valve 3 to be rapidly closed by the water hammer. This is a means to prevent water hammer from occurring.

[0007]

Since the single-shaft pressure reducing valve has a structure that closes when the pressure on the secondary side becomes equal to or higher than the set pressure, the tap provided on the pipe on the secondary side is operated by operating a single lever. When a faucet that opens and closes or a faucet that is opened and closed by an electromagnetic valve is used, and a sudden closing of the faucet causes a water hammer, the pressure regulating valve of the uniaxial pressure reducing valve is rapidly closed, and this uniaxial valve is closed. A secondary water hammer originating from the pressure reducing valve may occur,
The water supply / hot water supply equipment connected to this single-shaft pressure reducing valve
There is a problem that can cause failure.

The means of Japanese Patent Application No. 1-131830 developed to prevent a secondary water hammer caused by the single-shaft pressure reducing valve has a cylindrical portion provided at the rear end of the pressure regulating valve. Fits in the secondary flow path and forms a narrow gap on the fitting surface that restricts the flow of water between the secondary flow path and the pressure-sensitive chamber, thereby reducing sensitivity. There's a problem.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem occurring in the conventional means, and provides a single-shaft pressure reducing valve capable of preventing generation of a secondary water hammer without lowering sensitivity. The purpose is to:

[0010]

Means for Solving the Problems In the present invention, in order to achieve the above object, as first means,
In the above-described uniaxial pressure reducing valve, a primary wall and a secondary wall are provided at a portion of a partition wall or a valve seat provided in the body so as to partition the primary side and the secondary side, the portion facing the water flow passage of the lumen of the pressure regulating valve. A non-return hole communicating with the side is opened separately from a water opening provided in the partition wall or the valve seat fitting, and a check valve seat is formed around the non-return hole on the primary side wall surface of the partition wall. To provide a uniaxial pressure reducing valve to dispose the check valve opposite to the check valve seat from the primary side of the partition wall to the check valve seat,

As a second means, in the uniaxial pressure reducing valve, a partition wall or a valve washer provided in the body for partitioning the primary side and the secondary side is opposed to a water passage in the lumen of the pressure regulating valve. A check hole penetrating from the primary side to the secondary side is provided separately from the water opening formed in the partition wall or the valve seat fitting, and the partition wall or the valve seat fitting is provided around the check hole. A check valve seat is provided on the primary side wall surface, and a check valve opposed thereto is disposed on the primary side of the partition wall or the valve seat fitting,
A shaft provided on the check valve is inserted through the check hole and protrudes to the secondary side, and a uniaxial pressure reducing valve characterized by providing a stopper or a stopper for the protrusion is provided.

As a third means, in a uniaxial pressure reducing valve, a partition wall or a valve seat provided in the body so as to partition the primary side from the secondary side is provided with a water flow passage in the lumen of the pressure regulating valve. A check hole that penetrates from the primary side to the secondary side is formed separately from the water inlet that is formed in the partition wall or the peripheral edge of the valve seat fitting, and is separated from the check hole by elasticity. A film-like body made of an elastic material is disposed on the primary side of the partition wall or the valve seat fitting, and the partition wall or the valve seat fitting or the body is arranged such that the film-like body is made of an elastic material and closes the check hole from the primary side. Raise the uniaxial pressure reducing valve attached to the

As a fourth means, in a single-shaft pressure reducing valve,
A partition wall or a valve seat fitting provided in the body to separate the primary side and the secondary side is opposed to the valve portion of the cylindrical pressure regulating valve housed in the valve chamber in the body on the secondary side thereof. The valve seat to be formed and mounted in an annular or disc-like shape with elastic material,
A non-return hole penetrating from the primary side to the secondary side at a portion of the partition wall or the valve fitting that faces the water flow path of the lumen of the pressure regulating valve is provided at the peripheral edge of the partition wall or the valve fitting. Along with the water opening that has been opened, a plurality of communication holes are formed around the check hole in a portion facing the annular valve seat or the disk-shaped valve seat so as to pass through a partition wall or a valve seat fitting. Opened, on the primary side of the partition wall or valve seat, a film-shaped body made of an elastic material that closes the check hole by abutting against the check hole so as to be able to come and go, is arranged, A uniaxial pressure reducing valve, characterized in that an elastic material for molding the same is connected to an elastic material for molding the valve seat through the plurality of communication holes and attached to a partition wall or a primary side of a valve seat fitting,

As a fifth means, in a single-shaft pressure reducing valve,
A partition wall or a valve seat fitting provided in the body so as to partition the primary side and the secondary side has a reverse side penetrating from the primary side to the secondary side in a portion of the lumen of the pressure regulating valve facing the water flow path. A stop hole is formed separately from a water opening provided in a peripheral portion of the partition wall or the valve washer. On a primary side of the partition wall or the valve washer, a peripheral portion has the partition around the check hole. A film-like body made of an elastic material is hermetically adhered to the wall or the primary side wall of the valve washer, and the center side is separated from the partition wall or the valve-seat fitting so as to be detachable from the wall. Raising a uniaxial pressure-reducing valve, which is mounted on a primary side of a partition wall or a valve washer that is inflatable and contractible and communicates with the secondary side through a check hole, which is shut off to the primary side,

As a sixth means, in a single-shaft pressure reducing valve,
A partition wall or valve washer provided in the body to separate the primary side and the secondary side has a cylindrical shape at the front end side of a cylindrical pressure regulating valve to be stored in a valve chamber in the body on its secondary side. A check valve which is formed by forming a valve seat facing the valve into an annular or disc-like shape by using an elastic material, and penetrates from a primary side to a secondary side in a portion of the lumen of the pressure regulating valve which faces the water passage. A hole is formed separately from a water opening formed in the peripheral wall of the partition wall or the valve seat metal fitting, and a portion around the check hole facing the annular valve seat or the disc-shaped valve seat. A plurality of communication holes penetrating the partition wall or the valve washer is opened, and the peripheral portion is air-tightly bonded to the primary wall of the partition wall or the valve washer on the primary side of the partition wall or the valve washer. A film-like body made of an elastic material whose center side faces the partition wall or valve seat The elastic material to be formed and the elastic material to form the valve seat are continuously arranged integrally through the plurality of communication holes described above, and are cut off to the primary side by the film-like body and are connected to the elastic member through the check holes. A uniaxial pressure reducing valve characterized in that an expandable and contractible expansion chamber communicating with the secondary side is provided on a primary side of a partition wall or a valve seat,

As a seventh means, in a single-shaft pressure reducing valve,
A partition wall or valve washer provided in the body to separate the primary side and the secondary side has a cylindrical shape at the front end side of a cylindrical pressure regulating valve to be stored in a valve chamber in the body on its secondary side. A check valve which is formed by forming a valve seat facing the valve into an annular or disc-like shape by using an elastic material, and penetrates from a primary side to a secondary side in a portion of the lumen of the pressure regulating valve which faces the water passage. A hole is formed separately from a water opening provided in a peripheral portion of the partition wall or the valve washer, and a bag-like shape surrounding a void communicating with the check hole is provided on a primary side of the partition wall or the valve washer. Or an expandable / contractible elastic film formed in a bottomed cylindrical shape, and partitioned by the elastic film from the primary side to partition the expandable / contractible expansion chamber communicating with the secondary side through a check hole. A single-shaft pressure reducing valve is provided which is mounted on a wall or a primary side of a valve seat.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A uniaxial pressure reducing valve for preventing the occurrence of a secondary water hammer according to the present invention includes a pressure regulating valve mechanism and a valve box storing the same.
As shown in FIG. 5, one end side (the right end side in the figure)
And a connection port 10 connected to the primary side X, and a connection port 11 connected to the secondary side Y at the other end (left end side in the figure). A partition wall 2 that separates the primary side X and the secondary side Y is provided at a position close to the primary side X in the lumen, and a water inlet 20 is provided at a peripheral portion of the partition wall 2. A valve chamber a was formed in the lumen of the body 1 closer to the side Y such that the axial direction of the valve chamber a was along the axial direction of the body 1, and the lumen was formed in the water passage 30 in the valve chamber a. The cylindrical pressure regulating valve 3 is mounted movably in the axial direction with its axial direction along the axial direction of the valve chamber a. A cylindrical valve 3a in the shape of a side seal valve is provided, and a portion of the pressure regulating valve 3 closer to the primary side than the cylindrical valve 3a is brought into abutment with the cylindrical valve 3a. The valve seat 4 is formed in an annular or appropriately shaped disk shape corresponding to the cylindrical valve 3a with an elastic material such as a synthetic rubber material, and is formed on the secondary-side wall surface of the partition wall 2 described above. Whether it is mounted on the mounting portion or mounted on a valve seat (not shown) formed separately from the partition wall 2, and the valve seat is mounted on the secondary side of the partition wall 2 in an overlapping manner; By fitting the valve seat fitting on which the valve seat 4 is mounted and supported into a mounting hole provided in the partition wall 2 and assembling the valve seat 4 integrally with the partition wall 2, the valve seat 4 is connected to the partition wall 2 or the partition wall 2. The pressure regulating valve 3 is disposed on the secondary side of the valve seat and fixedly mounted on the body 1. A pressure-sensitive plate 3b that moves in the direction is provided integrally with the pressure-sensitive plate 3b, and the pressure-sensitive plate 3b is urged to be pushed out to the secondary side Y by a spring 5 to constitute a uniaxial pressure reducing valve. For that way it may be configured similarly to previous monoaxial pressure reducing valves.

In the single-shaft pressure reducing valve A thus constructed, the partition wall 2 or the valve seat fitting attached to the partition wall 2 is preferably located at a position facing the center of the cylindrical valve 3a.
As shown in FIG. 5, a check hole 6 penetrating from the primary side X to the secondary side Y is provided separately from the water inlet 20 provided in the partition wall 2 or the peripheral portion of the valve seat.

A check valve formed of an elastic material such as a synthetic rubber material or an appropriate material such as a metal material around the above-described check hole 6 on the partition wall 2 or the primary side wall surface of the valve seat fitting. A check valve c is mounted on the primary side of the seat b so that the check valve c can move forward and backward from the primary side with respect to the check valve seat b. And projecting toward the secondary side of the partition wall 2 or the valve metal fitting through the through hole, and forming a large-diameter portion 71 having a diameter larger than the check hole 6 at the protruding end thereof as shown in FIG. Provided is a retaining means for preventing the primary side from slipping out. When water flows from the primary side X to the secondary side Y, the check valve c is pressed against the check valve seat b by water pressure and the check hole is formed. 6 is kept closed,
When a sudden pressure change occurs on the secondary side Y and the pressure propagates, the check valve c is pushed out to the primary side X as shown in FIG. To prevent the occurrence of water hammer.

The means for closing the check valve c so as to close the check hole 6 is that the check valve c is opened by gravity depending on the mode of connection to the piping of the body 1 as a valve box. When it is difficult to close the valve by moving to the valve side, as shown in FIG. 7, the center shaft 70 provided on the check valve c is attached to the end protruding from the check hole 6 to the secondary side Y. A spring seat 72 is provided, and a spring 73 for pushing the center shaft 70 toward the secondary side is provided between the spring seat 72 and the partition wall 2 or the secondary wall surface of the valve seat fitting. The valve c may be biased to the closing side.

The relief of the pressure performed through the check hole 6 is performed because the check hole 6 is opened at a position facing the water passage 30 in the lumen of the pressure regulating valve 3. Water channel 3
The pressure escaping performed by bypassing from 0 to the water inlet 20 formed in the periphery of the valve seat 4 is far more effectively performed, and even with the small-diameter check hole 6, the water hammer is provided. Is effectively suppressed.

In the means of the present invention, as shown in FIG. 7 described above, a cylindrical portion u which fits into the secondary flow path w is provided at the secondary end of the pressure regulating valve 3. Then, a narrow gap v is provided in the fitting surfaces thereof, so that it is difficult to close the pressure regulating valve 3. This may be implemented in the means of Japanese Patent Application No. 11-131830 developed by the present applicant. By using such a combination, the effect can be further enhanced.

In the means of the present invention, the partition wall 2 or the valve seat is arranged and opened so as to face the primary end of the water passage 30 in the lumen of the pressure regulating valve 3. The means for closing the check hole 6 during normal flow of water from the primary side X to the secondary side Y is provided by a reverse valve provided so as to advance and retreat with respect to a check valve seat b provided around the check hole 6. It is not necessary to perform the operation by the stop valve c. For example, as shown in FIG. 8, the film-like body 8 made of an elastic material such as a synthetic rubber material is used.
Is arranged on the partition wall 2 or the primary side of the valve seat fitting in a lid plate shape that closes the check hole 6 from the primary side, and a part of the peripheral side thereof is
In a normal state, the non-return hole 6 is held closed by the differential pressure between the primary side and the secondary side and the elasticity of the elastic material. As shown in FIG. 9, when there is a sudden increase in pressure on the next side, the film-like body 8 may be bent and rotated to open the check hole 6 and release the pressure to the primary side.

At this time, the film-like body 8 uses a material for forming the valve seat 4 as an elastic material for forming the film-like body 8 and is mounted on the partition wall 2 or the valve metal fitting on the secondary side thereof. The communication hole 21 is provided so as to correspond to the valve seat 4 and penetrate the partition wall or the valve seat metal fitting. Then, the valve seat 4 and the membrane 8 are connected to the partition wall 2 or the valve. By simultaneously molding from both the primary side and the secondary side of the washer, the membrane 8 is connected to the valve seat 4 via the communication hole 21,
With this continuous portion, the membrane 8 is supported by the partition wall 2 or the valve metal fitting.

According to the present invention, a non-return hole 6 penetrating from the secondary side to the primary side is provided in the partition wall 2 or the valve seat at a position facing the water flow passage 30 in the lumen of the pressure regulating valve 3. The check hole 6 is closed in a normal state where water flows from the primary side to the secondary side, and is opened when a sudden rise in pressure occurs on the secondary side and the pressure propagates. To release the pressure to the primary side, the open check hole 6
It is not necessary for the pressure to flow to the primary side.

For example, as shown in FIG. 10, the partition wall 2 or the primary side of the check hole 6 formed in the valve seat is formed to be flexible with an elastic material such as a synthetic resin material or a rubber material. A diaphragm-like membrane 8 is arranged, and its peripheral edge is air-tightly bonded around the above-described check hole 6 on the partition wall 2 or the primary side wall of the valve seat fitting. An expansion chamber d that expands and contracts through the check hole 6 is formed between the body 8 and the partition wall 2 or the valve seat. Under normal conditions, the elasticity of the membrane 8 and the water pressure from the primary side cause the expansion chamber d in FIG. , The volume of the expansion chamber d is reduced, and a sharp pressure rise occurs on the secondary side, and when the pressure propagates, the film-like body 8 is moved by the pressure in FIG.
The pressure may be absorbed by deforming as shown in FIG. 1 to increase the volume of the expansion chamber d.

At this time, the membrane 8 is formed of the same material as the elastic material for forming the valve seat 4, and the partition wall 2 or the valve metal fitting is provided around the check hole 6.
By providing the communication holes 21 penetrating the partition wall or the valve seat fitting, and simultaneously forming the valve seat 4 and the film body 8, the film bodies 8 flow into the communication holes 21 and condense. The elastic material may be integrally connected to the valve seat 4 to be supported by the partition wall 2 or the valve seat fitting.

The above-described expansion chamber d, which is provided on the primary side of the partition wall 2 or the valve seat in communication with the check hole 6, is provided on the primary side of the check hole 6 as shown in FIG. The lumen is a check hole 6
Elastic membrane 9 formed in a bag-like or bottomed cylindrical shape communicating with
Is formed by mounting an expandable and contractible elastic material, and the elastic film 9 is provided.
May be expanded by the pressure from the secondary side as shown in FIG. 13 to expand the expansion chamber d.

[0029]

As described above, the single-shaft pressure reducing valve according to the present invention is opposed to the water flow passage in the lumen of the pressure regulating valve of the partition wall or the valve seat that separates the primary side and the secondary side. In the part, open a check hole that penetrates from the secondary side to the primary side,
This is normally closed by a check valve or a membrane disposed on the primary side and opened when a sudden pressure rise occurs on the secondary side, or the primary side of a partition wall or valve washer Because the expansion and contraction expansion chamber that communicates with this check hole is installed so as to be shut off to the primary side, a sudden rise in pressure occurs on the secondary side, and when the pressure propagates In addition, the pressure is effectively released from the check hole located at the position facing the water flow passage in the bore of the pressure regulating valve, thereby suppressing the occurrence of the secondary water hammer.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a conventional single-shaft pressure reducing valve.

FIG. 2 is an explanatory diagram of the operation of the above.

FIG. 3 is a longitudinal sectional side view of a single-shaft pressure reducing valve according to the prior art.

FIG. 4 is an explanatory view of the operation of the above.

FIG. 5 is a vertical side view of a single-shaft pressure reducing valve embodying the present invention.

FIG. 6 is an explanatory diagram of the same operation.

FIG. 7 is a longitudinal sectional side view of a single-shaft pressure reducing valve different from the above embodiment.

FIG. 8 is a vertical sectional side view of a main part of a single-shaft pressure reducing valve which is different from the above embodiment.

FIG. 9 is an explanatory diagram of the operation of the above.

FIG. 10 is a longitudinal sectional side view of a single-shaft pressure reducing valve, which is different from another embodiment of the above.

FIG. 11 is an explanatory diagram of the same operation.

FIG. 12 is a longitudinal sectional side view of a single-shaft pressure reducing valve according to still another embodiment of the present invention.

FIG. 13 is an explanatory diagram of the same operation.

[Explanation of symbols]

A: uniaxial pressure reducing valve, X: primary side, Y: secondary side, a: valve chamber,
b: check valve seat, c: check valve, d: expansion chamber, u: tubular part,
v: gap, w: secondary channel, z: pressure-sensitive chamber, 1: body,
1a: the first half side connected to the primary side, 1b: the second half side connected to the secondary side, 10.11 connection port, 2 partition wall, 20 water passage port, 21 communication hole, 3 pressure regulating valve, 3a … A cylindrical valve,
3b: pressure-sensitive plate, 30: water passage, 4: valve seat, 5: spring,
6 ... check hole, 70 ... center shaft, 71 ... enlarged diameter part, 72 ...
Spring seat, 73: spring, 8: membrane, 9: elastic membrane.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H056 AA01 BB12 CA02 CA06 CB03 CD06 EE06 GG05 3H060 AA01 AA04 AA13 BB03 BB10 CC14 DA18 DC05 DD02 DD17 EE06 GG11 HH03 HH12 3H066 AA01 BA05 EA03 EE36 EE02 EA36 5H316 A12 KK02 KK10 LL01

Claims (7)

[Claims] In a uniaxial pressure reducing valve, a primary wall is provided at a portion of a partition wall or a valve seat provided in a body so as to partition a primary side and a secondary side, and opposed to a water passage in a lumen of a pressure regulating valve. A non-return hole communicating with the secondary side is provided separately from the water opening provided in the partition wall or the valve seat fitting, and the non-return hole is formed around the non-return hole on the primary side wall of the partition wall. A uniaxial pressure-reducing valve provided with a valve seat, and a check valve arranged on the check valve seat so as to face the check valve from the primary side of the partition wall. 2. A uniaxial pressure-reducing valve, comprising: a partition wall or valve washer provided in a body for partitioning a primary side and a secondary side; A non-return hole penetrating to the secondary side is provided separately from the water opening provided in the partition wall or the valve washer, and around the non-return hole, on the primary side wall surface of the partition wall or the valve washer. A check valve seat is provided, a check valve opposed to the check valve seat is disposed on the primary side of the partition wall or the valve seat fitting, and a shaft provided on the check valve is inserted through the check hole to form a secondary check valve. A uniaxial pressure-reducing valve characterized in that it protrudes to the side, and the protrusion is provided with a retaining process or retaining. 3. A uniaxial pressure-reducing valve, wherein a partition wall or a valve seat provided in the body so as to partition the primary side and the secondary side is provided at a portion of the lumen of the pressure regulating valve which faces the water flow path. A check hole that penetrates from the side to the secondary side is established separately from the water inlet that is established in the peripheral wall of the partition wall or the valve seat fitting,
A film-like body made of an elastic material which is opposed to the check hole by elasticity so as to be able to freely contact and close and closes the check hole from the primary side by contact is arranged on the primary side of the partition wall or the valve seat fitting. A uniaxial pressure reducing valve mounted on a partition wall, valve seat or body. 4. In a single-shaft pressure reducing valve, a partition wall or a valve seat fitting provided in a body so as to partition a primary side and a secondary side has a cylinder housed in a valve chamber in the body on a secondary side thereof. A valve seat opposed to the valve portion of the pressure-regulating valve is formed in an annular or disc-like shape by using an elastic material, and is mounted on a partition wall or a valve-seat fitting. A check hole that penetrates from the primary side to the secondary side is formed separately from a water opening provided in the peripheral portion of the partition wall or the valve seat metal fitting, and the above-described check hole is formed around the check hole. A plurality of communication holes are formed in a portion opposed to the annular valve seat or the disc-shaped valve seat so as to penetrate the partition wall or the valve seat fitting, and the check hole is provided on a primary side of the partition wall or the valve seat fitting. A film-like body made of an elastic material that is detachably opposed to and closes the check hole by abutment, A uniaxial pressure-reducing valve, characterized in that an elastic material for molding the valve seat is connected to the elastic material for molding the valve seat through the plurality of communication holes and attached to a partition wall or a primary side of a valve seat fitting. 5. In a single-shaft pressure reducing valve, a partition wall or a valve seat provided in the body so as to partition a primary side and a secondary side is provided at a portion facing a water flow path of a lumen of a pressure regulating valve.
A non-return hole penetrating from the primary side to the secondary side shall be established separately from the water inlet which has been established on the peripheral wall of the partition wall or valve washer. Is a film-like body made of an elastic material which is air-tightly adhered to a wall surface of the primary side of the partition wall or the valve seat around the check hole, and a center side of the wall is opposed to the partition wall or the valve seat so as to be able to freely come and go. A uniaxial depressurization in which an expandable and contractible expansion chamber which is shut off from the primary side by the membrane and communicates with the secondary side through a check hole is provided on a partition wall or a primary side of a valve seat fitting. valve. 6. A uniaxial pressure-reducing valve, wherein a partition wall or a valve washer provided in the body so as to partition the primary side and the secondary side has a cylindrical shape which is stored in a valve chamber in the body on the secondary side thereof. A valve seat that faces the cylindrical valve on the front end side of the pressure regulating valve is molded and installed in an annular or disc shape with an elastic material,
A non-return hole penetrating from the primary side to the secondary side at a portion of the lumen of the pressure regulating valve opposite to the water flow path is provided separately from a water inlet provided at the peripheral wall of the partition wall or valve seat. And, around the check hole, a plurality of communication holes penetrating the partition wall or the valve seat metal fitting are opened at a portion facing the annular valve seat or the disc-shaped valve seat, and the partition wall or the valve is opened. On the primary side of the washer, a film made of an elastic material whose peripheral edge is air-tightly bonded to the partition wall or the primary side wall of the valve washer and whose central side is detachably opposed to the partition wall or the valve washer. The body, the elastic material forming it and the elastic material forming the valve seat are arranged integrally and continuously through the plurality of communication holes described above, and are blocked from the primary side by the film-shaped body. An expandable / contractible expansion chamber communicating with the secondary side through the check hole is provided on the primary side of the partition wall or the valve seat. Uniaxial pressure reducing valve, characterized in that. 7. In a single-shaft pressure reducing valve, a partition wall or a valve washer provided in a body so as to partition a primary side and a secondary side has a cylindrical shape which is stored in a valve chamber in the body on a secondary side thereof. A valve seat that faces the cylindrical valve on the front end side of the pressure regulating valve is molded and installed in an annular or disc shape with an elastic material,
A non-return hole penetrating from the primary side to the secondary side at a portion of the lumen of the pressure regulating valve opposite to the water flow path is provided separately from a water inlet provided at the peripheral wall of the partition wall or valve seat. On the primary side of the partition wall or the valve seat, an inflatable elastic film formed in a bag shape or a bottomed cylindrical shape surrounding a space communicating with the check hole is provided. A uniaxial pressure-reducing valve, wherein an expandable and contractible expansion chamber which is shut off from the primary side and communicates with the secondary side via a check hole is provided on a partition wall or a primary side of a valve seat.