JPH0830333A - Reducing valve for hot water supplier - Google Patents

Abstract

PURPOSE:To obtain a reducing valve for hot water supplier, which is adaptive for a hot water supplier and inexpensive for facilitating a piping construction, by combining a relief valve in a certain form to miniaturize the entire valve while positioning a stop valve, which is integrated into the reducing valve, on the first-order side of the relief valve to be combined in integrally forming the relief valve while combining it with that reducing valve. CONSTITUTION:A valve body 5 for a reducing valve (w) is formed into a cylindrical valve and assembled with a body (a) while being linked with a pressure sensing panel 3 so as to be moved backward rather than a valve seat 4 for the reducing valve (w) corresponding to the second-order side pressure change of that pressure sensing panel 3, and a valve seat 6 for the stop valve is provided at the peripheral edge part of this valve body 5 on the side of an exit 5. Then, a valve body 7 for a stop valve (y) is arranged on the outer surface side of that valve seat 6 so as to be freely moved forward and backward rather than the valve seat 6, and the linked part of the valve body 5 for the reducing valve (w) and the pressure sensing panel 3 is formed so as to be freely disconnected/connected. Then, a valve body 9 for a relief valve (z) and a valve seat 8 for the relief valve (z) are mounted at those joint parts, and the periphery of the body part of the valve body 5 for the reducing valve (w) is communicated to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply facility for guiding hot water boiled by a water heater such as a boiler to a hot water tap by a hot water supply pipe when connecting a water supply pipe for guiding tap water to a hot water supply device. The present invention relates to an improvement in a pressure reducing valve for a water heater provided between the water heater and the water supply pipe.

[0002]

2. Description of the Related Art In a hot water supply facility, a water heater B incorporated in a hot water supply system is connected to a water supply pipe H for guiding tap water as shown in FIG. It is obligatory to use a pressure reducing valve w for reducing the pressure to a pressure equal to or less than a predetermined safety standard.

As shown in FIG. 2, the pressure reducing valve w used in this manner is, as shown in FIG. 2, a connection port 10 for connecting to the water supply pipe H and a connection port for connecting to the water heater B side. In the body a having 20, the pressure sensitive plate 3 that operates by sensing the pressure on the secondary side, the valve body 5 for the pressure reducing valve that operates in conjunction with the pressure sensitive plate 3, and the valve body 5 A valve seat 4 for the pressure reducing valve facing each other is installed, and on the upstream side of the pressure reducing mechanism portion including the valve body 5 for the pressure reducing valve and the valve seat 4 for the pressure reducing valve,
It is configured by installing a check valve y. When the pressure reducing valve w is used by connecting to the water heater B, as shown in FIG. 3 in which the portion surrounded by the chain line in FIG. Valve z
And is connected to the water heater B in combination with the set.

This is because it is required to further install the relief valve z as a countermeasure against abnormally high pressure on the secondary side due to a high temperature inside the connected water heater B. This is because the pressure reducing valve w and the relief valve z are connected together as a set.

[0005]

Therefore, the piping work for connecting the water supply pipe H to the water heater B requires a large space for assembling the pressure reducing valve w and the relief valve z.
In addition, there is a problem that equipment costs will increase.

For this purpose, the pressure reducing valve w and the relief valve z may be integrally combined with each other to form a composite structure. At that time, the check valve y is more than the relief valve z. If it is not combined so as to be located on the primary side, the relief valve z loses its function as a relief valve. From this, when the relief valve z is assembled under this constraint, the check valve y is provided in the decompression mechanism portion in a composite manner, so that the check valve y is provided.
Is located on the primary side of the relief valve z,
The relief valve z to be assembled is provided at the same position as in the case where the pressure reducing valve w and the relief valve z shown in FIG. 1 and FIG. Problems arise that are difficult to combine.

The present invention has been made in order to solve these problems occurring in the conventional means, and is intended to provide a relief valve z.
Is integrally formed with the pressure reducing valve w, while the check valve y incorporated in the pressure reducing valve w is positioned on the primary side with respect to the relief valve z to be combined, An object of the present invention is to obtain a pressure reducing valve for a water heater, which is suitable for a water heater and which is inexpensive and which facilitates piping work, in combination as a form of miniaturization.

[0008]

The present invention provides a valve body 5 for a pressure reducing valve as means for achieving the above object.
Is formed into a cylindrical valve and is connected to the pressure-sensitive plate 3 so as to move forward and backward with respect to the valve seat 4 for the pressure reducing valve according to the pressure change on the secondary side by the pressure-sensitive plate 3, and is assembled to the body a. A valve seat 6 for a check valve is provided on a peripheral portion of the valve body 5 on the outlet 5b side, and a valve body 7 for a check valve is provided on the outer surface side of the valve seat 6 so as to be able to move forward and backward with respect to the valve seat 6. The valve body 5 for the pressure reducing valve and the connecting portion of the pressure sensitive plate 3 are formed so as to be separable from each other, and the valve body 9 for the relief valve and the valve seat 8 for the relief valve are formed at these joint portions. The present invention proposes a pressure reducing valve for a water heater, which is provided with a valve and a valve body 5 for the pressure reducing valve so that the periphery of the body of the valve body 5 communicates with the outside.

[0009]

With the pressure reducing valve A for a water heater according to the present invention configured as described above, when the pressure on the secondary side reaches the set pressure set by the control operation of the pressure sensitive plate 3, the pressure reducing valve formed in the tubular valve is used. Valve body 5 is moved to the primary side, the valve portion 50 formed at the edge of the valve body 5 on the inlet 5a side abuts the valve seat 4 for the pressure reducing valve, and water is passed to the secondary side. Is shut off and the secondary side pressure is maintained in a state where it does not exceed the set pressure and rise.

Next, when an abnormal state occurs on the secondary side and the pressure on the secondary side becomes abnormally high, the valve body 5 which is a cylindrical valve is formed.
In the state where the valve portion 50 on the inlet 5a side of the valve abuts on the valve seat 4 for the pressure reducing valve and does not move, the pressure sensitive plate 3 is further pushed into the primary side by the pressure of the secondary side, so that the pressure sensitive plate 3 and the cylinder Pressure valve on the secondary side is opened by a relief valve z formed of a relief valve valve body 9 and a relief valve valve seat 8 which are provided at a site where the valve body 5 is connected to the valve body 5. Will flow into the vacant chamber d and will be removed to the outside from the escape port c provided in the vacant chamber d.

At this time, the check valve y is constructed by disposing a check valve seat 6 and a valve body 7 on the outlet 5b side of a valve body 5 for a pressure reducing valve formed in a cylindrical valve. Therefore, by being located on the primary side with respect to the relief valve z, the relief valve z is made to function as a relief valve.

Since the relief valve z is located between the check valve y and the pressure reducing valve w in the structure of the body a of the water heater pressure reducing valve A, the water pressure reducing valve for the water heater is reduced. The whole A can be remarkably miniaturized.

[0013]

Next, embodiments will be described in detail with reference to the drawings. In addition,
As for the reference numerals in the drawings, the same reference numerals are used for components having the same effects as those of the conventional means.

FIG. 4 is a vertical sectional side view of a water heater pressure reducing valve A according to the present invention. In the figure, a is a body, w is a pressure reducing valve, 3 is a pressure sensitive plate, y is a check valve, and z is a check valve. Indicates a relief valve.

The body a has a primary side connection fitting 1 having a connection side 10 with the primary side, and a connection side 20.2 with the secondary side.
The secondary side connecting metal fitting 2 having 0'is provided, and they are assembled by abutting them and connecting them with a set bolt b.

In the primary side connection fitting 1, the inner cavity of the connection port 10 provided on the outer end side for connecting to the primary side pipe supports the accommodating portion of the strainer 11 and the valve seat 4 for the pressure reducing valve. The valve seat fitting 40 is formed on the mounting portion, and the strainer 11 and the valve seat fitting 40 are assembled therein.

The valve seat fitting 40 is assembled by screwing a threaded portion provided on the outer periphery with a female threaded portion provided in an inner cavity on the outer end side of the primary side connecting fitting 1. The valve seat 4 supported on the inner end side is moved in the axial direction (left and right direction in FIG. 4) of the primary-side connection fitting 1 by rotating it against the inner end side and also serves as an adjusting screw for adjusting the set pressure of the pressure reducing valve w. .

The inner end side of the primary-side connecting fitting 1 is formed in a funnel-like portion whose diameter gradually increases toward the joint surface with the secondary-side connecting fitting 2, and is provided so as to serve as the bottom wall thereof. The partition wall 12 separates from the assembly portion of the valve seat fitting 40 described above, and at the center of the partition wall 12, there is a through hole 13 through which the valve body 5 of the pressure reducing valve w formed in the tubular valve is slidably inserted. It has been opened.

The pressure reducing valve w is composed of a valve body 5 for a pressure reducing valve formed on a tubular valve and a valve seat 4 for the pressure reducing valve, and the valve seat 4 is supported by the valve seat fitting 40. In the assembly part formed in the primary side connection fitting 1, the assembly is adjusted to a desired set position and assembled in a fixed state.

Further, the valve body 5 formed in the tubular valve has an inlet 5
A valve portion 50 facing the valve seat 4 is formed at the end portion on the a side, and is arranged in the funnel-shaped portion on the inner end side of the primary side connection fitting 1.
A through hole 1 having an end portion on the inlet 5a side provided in the partition wall 12
3, the watertight holding member 14 holds it watertightly and slidably inserts the valve portion 50 at the end portion on the inlet 5a side.
Is opposed to the valve seat 4 so as to move back and forth.

The valve body 5 formed on this cylindrical valve is
A flange portion 51 that expands in diameter toward four circumferences is formed at the end portion on the outlet 5b side thereof, and the center hole portion 2a is previously inserted into the outer periphery of the body portion of the valve body 5 therein. The pressure-sensitive plates 3 are abutted against each other and integrally connected, and the pressure-sensitive plates 3 are pushed out to the secondary side by the pressure reducing spring f1 so that the pressure-sensitive plates 3 move forward and backward with respect to the valve seat 4 in accordance with the operation of the pressure-sensitive plates 3. is there.

The pressure-sensitive plate 3 is a diaphragm made of a flexible material, and the central side excluding the peripheral portion is integrally bonded to a dish-shaped diaphragm metal fitting 30 which is in contact with the inner surface of the diaphragm. A central hole fitted into the outer periphery of the body portion of the valve body 5 formed in the tubular valve is formed with a diameter much larger than the outer diameter of the valve body 5. The outer peripheral portion of the peripheral portion is formed on the joint surface of the joint flange 15 formed on the opening end of the funnel-shaped portion of the primary-side connecting fitting 1 and on the primary-side end of the secondary-side connecting fitting 2. Inserted between the joint flange portion 22 and the joint surface, the joint collar portion 1
5 and 22 are assembled by closing them with set bolts b ... and sandwiching them between them.

A ring-shaped locking projection 31 is formed on the outer peripheral edge of the pressure-sensitive plate 3, and the secondary side connecting fitting 2 is provided.
A fitting recess 23 into which the locking projection 31 is fitted is formed in a ring shape on the joint surface of the connecting flange 22.

The check valve y is composed of a check valve valve seat 6 and a check valve valve body 7, and the valve seat 6 is a valve valve for a pressure reducing valve formed in the aforementioned cylindrical valve. 5 is provided so as to be formed on the peripheral portion of the outlet 5b on the side of the outlet 5b with the outer surface side of the flange portion 51 formed therein. Further, the valve body 7 slidably supports the valve shaft 70 on the support fitting 24 provided inside the secondary side fitting 2 so that the valve portion 71 on the tip side moves forward and backward with respect to the valve seat 6. And is pushed out toward the valve seat 6 by the check valve spring f2 interposed between the support metal fitting 24 and the support metal fitting 24.

The relief valve z is composed of a relief valve valve seat 8 and a relief valve valve body 9, and the valve seat 8 of the relief valve z is formed of the pressure reducing valve body 5 formed in the aforementioned cylindrical valve. Collar part 5 provided on the outlet 5b side
It is formed on the inner surface side of 1. Also, the valve body 9 for the relief valve
Are formed on the outer surface side of the central portion of the pressure sensitive plate 3. The relief valve valve seat 8 and the relief valve valve body 9 are provided for the relief valve which is interposed between the outer periphery of the body of the pressure reducing valve body 5 and the inner surface of the pressure sensitive plate 3. The spring f3 is in close contact with the spring f3 to hold the valve closed. This relief valve spring f
3 is a pressure rise on the secondary side, and in the state where the valve body 5 for the pressure reducing valve is pushed until it collides with the valve seat 4 for the pressure reducing valve, the pressure on the secondary side pushing the pressure sensitive plate 3 is From the state of equilibrium with the spring pressure of the pressure reducing valve spring f1,
The relief valve z acts to keep the relief valve z in the closed state until the relief valve z is increased by an amount corresponding to the spring pressure of the relief valve spring f3 added to the spring pressure of 1.

Further, in the relief valve z, the abnormal pressure generated on the secondary side causes the pressure sensitive plate 3 to resist the spring pressure of the pressure reducing valve spring f1,
The relief valve spring f3 added to the pressure reducing valve spring f1 from a state in which the pressure reducing valve valve body 5 is pushed until it abuts the valve seat 4.
When the pressure rises by an amount corresponding to the spring pressure, the central portion of the pressure sensitive plate 3 moves away from the flange portion 51 of the valve body 5 as shown in FIG. Excessive pressure water is discharged to the outside through a gap formed between the central hole of the pressure sensitive plate 3 and the outer peripheral surface of the body of the valve body 5.

The relief port c is formed in the shape of a nipple and is attached to the peripheral wall of the funnel-shaped portion of the primary-side connecting fitting 1 so that the pressure-sensitive plate 3 surrounds the valve body 5 for the pressure reducing valve to the secondary side. It is provided so as to communicate with the outside by the water-tight holding member 14 and the vacant chamber d formed in a state of being blocked from the primary side.

Next, FIG. 5 shows another embodiment.
This embodiment shows a modification of the mounting means of the check valve y.

That is, the check valve valve seat 6 constituting the check valve y is formed on the outer peripheral surface of the collar portion 51 formed on the periphery of the valve body 5 for the pressure reducing valve on the outlet 5b side. The installation on the side is the same as in the previous embodiment, but the collar 5
1 is not flat along the outer surface of No. 1 but is formed in a mortar shape in which the outlet 5b of the valve body 5 for the pressure reducing valve formed in the tubular valve is surrounded by an inclined surface.

Further, the valve body 7 for the check valve has a valve portion 71 formed in a cone shape to be fitted into the above-mentioned mortar-shaped valve seat 6, and the valve shaft 70 is a cylindrical valve. A cage-shaped mounting frame 72 is mounted on the upper surface of the flange portion 51 provided at the outlet 5b of the valve body 5 for the pressure reducing valve thus formed, and is slidably supported by the mounting frame 72. A check valve spring f2 is interposed between the valve portion 71 and the valve portion 71. From this, the support fitting 24 for supporting the valve body 7 of the check valve y is omitted from the inner cavity of the secondary-side connecting fitting 2, and the secondary-side connecting fitting 2 is connected in a tubular configuration. I have to.

Since this embodiment is the same as the above-mentioned embodiment except for the above-mentioned points, the same reference numerals are given to the components having the same effect, and the detailed description thereof will be omitted.

Next, FIG. 6 shows another embodiment. In this embodiment, the connection port 2 provided in the secondary side connection fitting 2
It is an example in which 0, 20 ', 20 "... Is formed in three openings.
In this embodiment, for example, as shown in FIG. 2, when the hot water taken out from the hot water supply port of the hot water supply device B through the hot water supply pipe h2 is guided to the hot water tap through the mixing valve MV, the mixing valve MV is used. To the same pressure water supply pipe h1
In connection construction of, three connection ports 20, 20 ', 2
0 "... to freely select two of them so as to have a degree of freedom in the direction of the connecting pipe. The connection with the water heater B and the water supply pipe for equal pressure water supply to the mixing valve MV. The connection ports 20 ″ other than the two connection ports 20 · 20 ′ selected for connection with h1 are sealed with a blind lid.

In this embodiment as well, the rest of the configuration except the above-mentioned points is the same as that of the above-mentioned embodiment, and therefore the components having the same effects are designated by the same reference numerals and detailed description thereof will be omitted.

[0034]

As described above, in the pressure reducing valve for a water heater according to the present invention, the valve body 5 for the pressure reducing valve is formed as a cylindrical valve, and a check valve is provided at the peripheral portion on the outlet 5b side thereof. Dispose valve y,
The connecting portion of the pressure reducing plate 3 and the valve body 5 for the pressure reducing valve, which is a cylindrical valve, can be freely connected and detached, and the valve seat 8 for the relief valve is provided at the joint portion.
By installing the relief valve valve body 9 and the relief valve valve body 9, the check valve y is relieved because the body a of the pressure reducing valve w is integrated with the relief valve z. The relief valve z is located between the check valve y and the pressure reducing valve w in the structure of the body a of the water heater pressure reducing valve A while being positioned on the primary side with respect to the valve z. Then, the whole size can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a conventional pressure reducing valve.

FIG. 2 is a schematic development view of a hot water supply facility in which the pressure reducing valve is connected to a pipe line.

FIG. 3 is a side view of the main part of the above.

FIG. 4 is a vertical sectional side view of a pressure reducing valve for a water heater according to the present invention.

FIG. 5 is an explanatory view of the operation of the above pressure reducing valve.

FIG. 6 is a vertical sectional side view of another embodiment of the pressure reducing valve for the water heater.

FIG. 7 is a vertical cross-sectional side view of still another embodiment of the pressure reducing valve for the water heater.

[Explanation of symbols]

A ... Pressure reducing valve for water heater, B ... Water heater, H · h1 · h2… Water supply piping, MV… Mixing valve, a… Body, b… Set bolt, c… Escape port, d… Vacancy, e… Strainer, f1 ... decompression spring, f2 ... check valve spring, f3 ... relief valve spring, w ... decompression valve, y ... check valve, z ... relief valve, 1
... primary side connection fitting, 10 ... connection port, 11 ... strainer, 12 ... partition wall, 13 ... through hole, 14 ... watertight holding member, 1
5 ... Joining collar part, 2 ... Secondary side connection fitting, 2a ... Center hole part,
20 ・ 20 ′ ・ 20 ″ ... Connection port, 22 ... Joining collar part, 23
... fitting recesses, 24 ... support fittings, 3 ... pressure sensitive plate, 30 ... diaphragm fittings, 31 ... locking projections, 4 ... valve seat for pressure reducing valve,
40 ... Valve seat fittings, 5 ... Valve body for pressure reducing valve, 5a ... Inlet, 5
b ... Outlet, 50 ... Valve part, 51 ... Collar part, 6 ... Check valve valve seat, 7 ... Check valve valve body, 70 ... Valve shaft, 71 ... Valve part, 7
2 ... Mounting frame, 8 ... Valve seat for relief valve, 9 ... Valve body for relief valve.

Claims (3)

[Claims] 1. A valve body 5 for a pressure reducing valve is formed as a tubular valve, and the pressure sensitive plate 3 is moved forward and backward with respect to a valve seat 4 for the pressure reducing valve in response to a pressure change on the secondary side. 3 is assembled to the body a by being connected to the valve body 3, and a valve seat 6 for a check valve is provided on the peripheral portion of the valve body 5 on the outlet 5b side, and a valve for the check valve is provided on the outer surface side of the valve seat 6. The body 7 is arranged so as to be movable back and forth with respect to the valve seat 6, and the connecting portion between the valve body 5 for the pressure reducing valve and the pressure sensitive plate 3 is formed so as to be separable and contactable, and the connecting portion is used for the relief valve. A pressure reducing valve for a water heater, which is provided with a valve body 9 and a valve seat 8 for a relief valve, and makes the periphery of the body of the valve body 5 for a pressure reducing valve communicate with the outside. 2. A mounting frame 72 for supporting a check valve valve body 7 is integrally formed with the valve body 5 at the outlet 5b side end of the pressure reducing valve valve body 5 formed in a tubular valve. Installed on the mounting frame 72,
A valve body (7) for a check valve is movably supported by a valve seat (6) for a check valve, which is mounted on a peripheral portion of an outlet (5b) of a valve body (5) for a pressure reducing valve. A pressure reducing valve for a water heater according to 1. 3. A valve body 5 for a pressure reducing valve is formed as a cylindrical valve, and the pressure sensitive plate 3 is moved forward and backward by a pressure sensitive plate 3 with respect to a valve seat 4 for the pressure reducing valve in response to a pressure change on the secondary side. 3 is assembled to the body a by being connected to the pressure-reducing valve 3, and the connecting portion between the valve body 5 for the pressure-reducing valve and the pressure-sensitive plate 3 is formed so as to be separable from and to the valve body 9 for the relief valve. In a pressure reducing valve for a water heater, which is provided with a relief valve valve seat 8 and allows the periphery of the body of the valve body 5 for the pressure reducing valve to communicate with the outside,
Valve body 5 for pressure reducing valve and valve seat 4 for pressure reducing valve formed on a tubular valve
Primary side connection fitting 1 that can store and, and connection port 2 to the secondary side
And a secondary side connecting fitting 2 which is joined to and connected to the primary side connecting fitting 1 and is provided with 0.20 '... and a pressure sensitive plate which is connected to the valve body 5 for the pressure reducing valve on the joint surface. A pressure reducing valve for a water heater, wherein the outer peripheral edge portion of 3 is clamped.