JPH0571653A - End stopping relief valve - Google Patents

Abstract

PURPOSE:To operate an end stopping relief valve by means of opening or closing an ON-OFF valve such as a faucet or the like to be installed in an intermediate water faucet or the like being connected downstream, not using another ON-OFF valve controlled for opening or closing by electric power. CONSTITUTION:A main valve 2, a relief valve V and a check valve 3 are assembled in this order to a valve box 1 provided with a water inlet 10 and a water outlet 11 from the upstream. In succession, a differential pressure takeout mechanism W, taking out a pressure differential between primary pressure and down stream pressure from the check valve 3 is assembled thereto, and the main valve 2 is controlled for its opening or closing by a variation in the differential pressure the differential pressure takeout mechanism W takes out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open / close valve on the downstream side of an atmosphere release valve which is connected to a water supply device in place of a ball tap in order to reliably prevent backwater from flowing back to the tap water side. The present invention relates to the improvement of the pre-opening atmosphere release valve used when there is.

[0002]

2. Description of the Related Art Normally, a ball tap is used as a means for surely preventing backwater from flowing back to the tap water side.

Since this ball tap is expensive, as a means to replace it, the applicant combined an edge cutoff valve (atmosphere opening valve) with an opening / closing valve arranged upstream of the edge cutoff valve.
A means to be incorporated in the water supply device has been developed and applied for as Japanese Patent Application No. 2-5479.

Further, since this means is an original opening atmosphere opening valve having an opening / closing valve on the upstream side of the atmosphere opening valve, when there is an opening / closing valve such as a faucet on the downstream side of the atmosphere opening valve, the faucet is As a stop air release valve that opens to the atmosphere when closed, it is electrically controlled to open and close by opening and closing the faucet on the downstream side. We are developing a means that combines a valve mechanism.

[0005]

The above-mentioned pre-opening atmosphere release valve is electrically controlled so that the atmosphere release valve is opened by closing the opening / closing valve such as a faucet located downstream of the atmosphere release valve. Since the valve mechanism is used, in addition to the piping work of the water supply facility, there is a problem that the electric work for operating the electrically controlled valve mechanism connected to the pipe is required, which makes the construction troublesome. There is a demand for a pre-opening atmosphere release valve that does not use electricity.

[0006] As an example of a water supply facility in which it is regulated by law that the middle water is surely prevented from flowing back to the tap water side, a hot water supply facility in which a solar water heater a and a boiler b are combined. To explain, the hot water supply facility in this case is, as shown in FIG. 1, a water supply pipe c leading to a tap.
Is connected to the water inlet of the boiler b, and the pipe e for supplying water from the water supply pipe c to the water supply port of the solar water heater a via the ball tap d is connected via the valve V1 to obtain the hot water outlet of the solar water heater a. A pipe f leading to the water supply pipe c is connected to the water supply pipe c via a valve V2, and the water supply pipe c is provided with a valve V3 upstream of the connection position with the pipe f, so that the pipe of the solar water heater a in the winter season is connected. It is desired to switch between a state in which freezing inside is prevented and a state in which hot water boiled by the solar water heater a is supplied to the boiler b in the summer.

That is, in the winter, the water on the side of the solar water heater a is dropped to close the valves V1 and V2 at the base ends of the pipes e and f, and the valve V3 of the water supply pipe c is left open to the boiler b. Only tap water is directly supplied through the water supply pipe c.

In the summer, the valves V1 and V2 provided at the base ends of the pipes e and f communicating with the solar water heater a are opened, and the water supply pipe c is upstream from the connection point with the pipe f. With the valve V3 provided on the side closed, tap water supplied from the water tap by the water supply pipe c flows to the boiler b via the solar water heater a, and the boiler b is used as an auxiliary heat source for the solar water heater a. Is to be

However, if the water supply device is constructed in this way, the solar water heater a is directly connected to the tap water supply pipe c when the valve V1 and the valve V2 are opened and the valve V3 is closed. Therefore, when the on-off valve h such as a faucet provided in the hot water supply pipe g connected to the hot water outlet of the boiler b is closed and the flow is stopped, When the water pressure drops, if the valve V3 is incompletely closed due to dust being caught in the valve V3 or a mistake in valve closing operation, the water (medium water) on the solar water heater a side will be tap water. Such connections are prohibited as they flow back into the water.

Therefore, as shown in FIG. 2, if an atmosphere opening valve v is provided between the valve V3 and the valve V2 to cut the edge between the water in the water supply pipe c and the water in the solar water heater a. , When the on-off valve h such as a faucet is closed and there is no flow,
This air release valve v opens to open the air release port, and an air layer is present between the water supply pipe c side and the solar water heater a side, so that the edge is cut off, To do this, it is necessary to control the atmosphere opening valve v so as to close the atmosphere opening port when the opening / closing valve h such as a faucet is opened.

It is an object of the present invention to provide a new means for constructing a pre-opening atmosphere release valve that allows this control to be performed without using electricity.

[0012]

In order to achieve this object, the present invention provides a valve box having a water inlet and a water outlet with a main valve, an atmosphere release valve and a check valve. Assemble in that order from the upstream side, and also install a differential pressure take-out mechanism that takes out the differential pressure between the pressure on the primary side and the pressure downstream of the check valve, and the main valve changes due to the change in differential pressure taken out by the differential pressure take-out mechanism. The present invention proposes an atmospheric opening valve for stopping, which is characterized by controlling the opening and closing of a valve, and a valve box having a water inlet and a water outlet has a main valve, an atmospheric opening valve, a check valve, and a second check valve. The valves are assembled in that order from the upstream side, and a differential pressure take-out mechanism for extracting the differential pressure between the pressure between the check valve and the second check valve and the pressure downstream of the second check valve is assembled. The main feature is that the main valve is opened and closed by changing the differential pressure taken out by the differential pressure take-out mechanism. That it is intended to raise the previous stop for the air release valve.

[0013]

Embodiments Next, embodiments will be described in detail with reference to the drawings. Figure 3
FIG. 1 is a vertical cross-sectional front view of a stop air release valve A for carrying out the present invention. In FIG. 1, 1 is a valve box, 10 is a water inlet provided in the valve box 1, 11 is a water outlet provided in the valve box 1, 2 is the main valve, v
Is an atmosphere release valve, 3 is a check valve for preventing backflow when the pressure on the secondary side connected to the water outlet 11 is increased, and w is a differential pressure extraction mechanism.

The valve box 1 is formed with a water inlet 10 formed on one side on a connecting pipe connected to a water supply pipe c (see FIGS. 1 and 2) communicating with a tap, and on the other side. Solar water heater a
-The water outlet 11 formed in the connecting pipe connected to the secondary side pipe which becomes the middle water of the boiler b is formed. An atmosphere opening port 12 that opens to the atmosphere is formed on the bottom surface side.

On the upper surface side, a partition wall 13 that separates the primary side communicating with the water inlet 10 and the secondary side communicating with the water outlet 11 and the atmosphere opening port 12 is provided at the center of the partition wall 13. Annular flow passage 14 surrounding the main valve seat 20
Is formed in a state in which the upper side is opened, and a diaphragm 4 is attached to the upper surface of the flow path 14, and the diaphragm 4 forms a primary chamber X. The main valve 2 is attached to a central portion on the inner surface side of the diaphragm 4 so as to vertically face the main valve valve seat 20 provided in the partition wall 13.

In the valve box 1, below the partition wall 13 provided with the valve seat 20 for the main valve, the valve seat 2 for the main valve is provided.
The cylindrical portion 15 having the axis of 0 and the axis of the axis aligned is provided,
At a portion near the lower end of the cylindrical portion 15, the atmosphere opening port 12
Has been established. The atmosphere opening valve v that opens and closes the atmosphere opening port 12 has its valve shaft 50 disposed at the axis center portion of the cylindrical portion 15 and the upper end thereof is integrally connected to the axis center portion of the diaphragm 4 described above. At the lower end of the valve shaft 50, the valve seat 5 for the atmosphere release valve provided around the atmosphere release port 12 is provided.
1. The atmosphere release valve v is assembled so as to face 1 from the lower surface side, and the main valve 2 is moved by the rising operation of the diaphragm 4 described above.
When the valve is opened, the atmosphere opening port 12 is closed, and when the main valve 2 is closed by the lowering operation of the diaphragm 4, the atmosphere opening port 12 is opened, and the spring 52 for pushing up is connected.

The check valve 3 is arranged in the connecting pipe forming the water outlet 11, and is provided with respect to the check valve seat 30 provided between the cylindrical portion 15 and the water outlet 11. They are opposed to each other from the downstream side and are urged toward the closed side by the spring 31.

The differential pressure take-out mechanism w is composed of the diaphragm 4 described above.
An upside-down cup-shaped case 6 that also serves as a mounting member for the diaphragm 4 is assembled on the upper surface side of the with a set bolt 60 ... An adjusting screw 62 for adjusting the spring pressure of the spring 61 is provided on the top of the case 6, whereby a vacant chamber surrounded by the diaphragm 4 and the case 6 is formed in the tertiary chamber Z, and the tertiary chamber Z is connected to the communication passage 63. By communicating with the site on the downstream side of the check valve 3 near the water outlet 11 via the above, the pressure difference between the pressure on the primary side and the pressure near the water outlet 11 on the downstream side of the check valve 3 is increased. , The pressure in the tertiary chamber Z formed by the case 6 and the diaphragm 4 and the diaphragm 4
The pressure is taken out from the pressure in the primary chamber X which is in contact with the lower surface side of the.

Numeral 21 ensures that the main valve 2 is crimped to the main valve seat 20 and prevents water leakage during this time, so that the main valve seat 20 can be vertically displaced within a certain range. It is a sliding member that supports and is pushed up by a spring 22. The sliding member 21 may be omitted.

The embodiment apparatus configured as described above operates as follows.

The water inlet 10 is connected to the tap water supply pipe c,
It is assumed that the water outlet 11 is connected to a middle water pipe such as a solar water heater a having an opening / closing valve h such as a faucet as shown in FIGS.

In this state, if the open / close valve h provided in the medium water piping connected to the water outlet 11 is opened, the pressure P3 near the water outlet 11 is lowered by the outflow of water from the open / close valve h, Along with this, the pressure in the tertiary chamber Z decreases. Then, the differential pressure generated thereby is taken out by the differential pressure take-out mechanism w as an operation in which the diaphragm 4 is pushed up by the differential pressure between the tertiary chamber Z and the primary chamber X, and the operation opens the main valve 2. At the same time, the atmosphere release valve v is pulled up to open the atmosphere release port 12
To block.

Therefore, when the opening / closing valve h provided in the pipe g on the medium water side is opened, the pre-opening atmosphere release valve A becomes the water inlet 10.
Tap water supplied from the water supply pipe c connected to the primary chamber X
From the flow path 14 through the inner cavity of the main valve seat 20 to the secondary chamber Y, from which the check valve 3 in contact with the check valve seat 30 is pushed open, and then from the water outlet 11. Let it flow out.

Next, when the opening / closing valve h such as a faucet is closed, the check valve 3 is closed by this, and at the same time, the water on the medium water side flowing into the tertiary chamber Z through the communication passage 63 causes The pressure in the tertiary chamber Z rises to a pressure P3 near the water outlet 11, the pressure P3 becomes equal to the pressure P1 in the primary chamber X, and the diaphragm 4, which is the operating portion of the differential pressure take-out mechanism w, moves to the primary chamber X. The pressure difference due to the difference between the pressure receiving area S1 on the side and the pressure receiving area S2 on the side of the tertiary chamber Z is pushed downward. As a result, as shown in FIG. 4, the main valve 2 provided on the lower surface side of the diaphragm 4 comes into contact with the main valve seat 20 to close the valve, and at the same time, the valve shaft 50 of the atmosphere release valve v is pushed down. Then, the atmosphere opening valve v is pulled downward from the atmosphere opening valve valve seat 51, and the atmosphere opening port 12 is opened to the atmosphere. Therefore, the atmosphere opening valve v is opened by the closing operation of the opening / closing valve h provided in the pipe g on the medium water side, and reliable edge cutting is performed.

Next, FIG. 5 shows another embodiment. In this embodiment, the opening / closing operation of the atmosphere release valve v provided in the valve box 1 is linked to a check valve 7 which opens / closes due to a change in the flow resistance of water flowing in the valve box 1, and vice versa. The atmosphere opening valve v is closed by opening the stop valve 7, and the atmosphere opening valve v is opened by closing the check valve 7 thereof. The differential pressure take-out mechanism w that takes out the differential pressure generated by the pressure drop near the water outlet 11 due to the opening / closing operation of the opening / closing valve h, and the main valve 2 that is opened and closed by the differential pressure taken out by the differential pressure take-out mechanism w It is a combination of the above.

Therefore, the diaphragm 4 of the differential pressure take-out mechanism w
The main valve 2 provided in the main valve 2 is provided at a position apart from the atmosphere opening valve v, and the opening / closing operation of the main valve 2 by the operation of the differential pressure extraction mechanism w is not directly related to the opening / closing operation of the atmosphere opening valve v. ing.

That is, in FIG. 5, a portion surrounded by a chain line I shown on the left half side is a normal edging valve B, which has a water inlet 10 'on one side and a water outlet 11 on the other side. An atmosphere opening / closing valve v, which opens and closes in opposition to a valve seat 51 for the atmosphere opening valve provided around the atmosphere opening port 12 from above, is housed in the valve box 1 having the atmosphere opening port 12 on the bottom side. A check valve valve seat 70 is provided above the atmosphere opening valve v, and a check valve 7 is provided facing the valve seat 70 from below and biased to the closing side by a spring 71. 10 ′ to the water outlet 11 is installed so as to be opened and closed by a change in the flow resistance of the water, and the check valve 7 and the atmosphere release valve v are connected by a connecting mechanism 72. Exit 1
A check valve 3 is installed on the first side.

Thus, when there is a flow of water from the water inlet 10 'to the water outlet 11, the check valve 7 is pushed down against the bias of the spring 71 due to the flow resistance, and the check valve 7 is pushed down. The valve seat 70 is opened, and the atmosphere opening valve v, which is connected at the same time, is dropped downward to close the atmosphere opening port 12. When the flow of water flowing through the valve box 1 is stopped, the check valve 7 is pushed up by the urging force of the spring 71 to abut against the check valve valve seat 70 to close the valve. The air release valve v is lifted to open the air release port 12 as usual.

When the water inlet 10 'of the edging valve B is connected to the water supply pipe c and the water outlet 11 is connected to the tap water g, the faucet connected to the pipe g. When the on-off valve h is closed, the flow in the valve box 1 is stopped, so that the atmosphere opening valve v is opened and the atmosphere opening port 12 is opened and the edge is cut off. The check valve 7 does not open, and the atmosphere release valve v remains open.

The portion indicated by the chain line II in FIG.
By extracting the differential pressure generated by the pressure drop near the water outlet 11 when the opening / closing valve h such as a faucet is opened, the valve box 1
A connecting pipe 80, which is a part that combines a differential pressure take-out mechanism w that creates an initial flow inside and a main valve 2 that opens and closes by its operation, and extends it to the water inlet 10 ′ of the edging valve B described above. Are connected to each other, and the valve seat 20 for the main valve in the embodiment shown in FIG. 3 is formed on the upper surface of the tip side thereof, and the primary chamber X is formed around the valve seat 20 for the main valve. An annular flow path 14 is formed, and a diaphragm 4 and an inverted cup-shaped case 6 are assembled on the upper surface of the flow path 14 to form a tertiary chamber Z, and the tertiary chamber Z is formed through the communication passage 63. The differential pressure take-out mechanism w is configured by communicating with the vicinity of the water outlet 11 of the above, and further, the substantial water inlet 10 is formed on the upstream side of the annular flow passage 14, and the main surface is provided on the lower surface of the diaphragm 4. Differential pressure extraction by assembling and mounting the main valve 2 facing the valve seat 20 A portion in which the mechanism w and the main valve 2 are combined is configured.

As a result, when the opening / closing valve h such as a faucet is opened, the pressure of the water near the water outlet 11 drops due to the resulting water flow, which occurs between the primary chamber X and the tertiary chamber Z. The diaphragm 4 serving as the operating portion of the differential pressure take-out mechanism w is actuated by the differential pressure, and the main valve 2 is opened, whereby the check valve is caused by the flow flowing through the main valve seat 20 toward the rim cutoff valve B. 7 is opened and the atmosphere release valve v is closed.

Reference numeral 61 is a spring for pushing down the diaphragm 4, 62 is an adjusting screw for adjusting the spring pressure of the spring 61, and 15 is a cylindrical portion formed in the valve box 1.

Next, FIG. 6 shows another embodiment. This embodiment is a modification of the embodiment of FIG. 5 described above, and is an example in which the position for extracting the differential pressure is different from that of the embodiments of FIGS. 3 and 5.

That is, a differential pressure take-out mechanism w for taking out a differential pressure generated when the pressure near the water outlet 11 drops when the opening / closing valve h such as a faucet is opened is assembled on the diaphragm 4 and its outer surface side. The case 6 to be attached forms a tertiary chamber Z, and the tertiary chamber Z is connected to the vicinity of the water outlet 11 of the valve box 1 via the communication passage 63. The diaphragm is the working portion of the differential pressure take-out mechanism w. Assembling the main valve 2 to 4 and connecting the differential pressure take-out mechanism w and the main valve 2 to the edging valve B including the check valve 7 and the atmosphere opening valve v has been described above. Although not different from the embodiment shown in FIG. 5, a vacant chamber u which is isolated from the primary side is formed on the lower surface side of the diaphragm 4 of the differential pressure take-out mechanism w.

Then, in the connecting pipe portion forming the water outlet 11 of the valve box 1, in addition to the check valve 3 which is provided so as to prevent back flow of the middle water from the secondary side, Another check valve 9 is provided on the secondary side so that the pressure P4 between the check valve 9 and the check valve 3 can be reversed when the opening / closing valve h such as a faucet is opened. The pressure of the spring 91 that urges the stop valve 9 toward the check valve seat 90 is kept higher than the pressure P3 near the water inlet 11, and the diaphragm 4 described above is held at this portion. The vacant chamber u formed on the lower surface side of the is communicated via the communication passage 92. And
As a result, when the opening / closing valve h such as a faucet is opened, the pressure difference between the pressure P4 in the empty chamber u and the pressure in the tertiary chamber Z becomes P4> P3, so that the diaphragm 4 is pushed up and the main valve 2 is opened. , The atmosphere release valve v is closed. It is designed to create a flow.

Further, the diaphragm 4 to which the main valve 2 is attached is connected to an operating rod 8 for opening the main valve 2 by forcibly pulling it up manually.

Since the rest of the configuration is the same as that of the embodiment shown in FIG. 5 described above, the components having the same effect are designated by the same reference numerals and detailed description thereof will be omitted.

In this embodiment, however, the check valve 7 is omitted and the cylindrical portion 15 for accommodating the atmosphere release valve v is connected below the main valve seat 20 as in the embodiment shown in FIG. However, the atmosphere opening valve v may be connected to the main valve 2.

[0039]

As described above, the pre-opening atmosphere release valve according to the present invention includes the main valve 2, the atmosphere release valve v, and the check valve in the valve box 1 having the water inlet 10 and the water outlet 11. 3 and
Assembling from the upstream side in that order, or further assembling the second check valve 9 on the downstream side of the check valve 3 and assembling the differential pressure extracting mechanism w, and connecting to the water outlet 11. The pressure change near the water outlet 11 caused by the opening / closing operation of the opening / closing valve h such as a faucet provided in the water pipe g is taken out by the differential pressure take-out mechanism w, and the opening / closing control of the main valve 2 is performed by the operation. Therefore, when the opening / closing valve h such as a faucet is opened, the differential pressure generated thereby is used to open the main valve 2 and create a flow for closing the atmosphere release valve v. Without using an on-off valve that controls opening and closing by
By using the atmosphere release valve v, the edge can be cut.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a hot water supply facility.

FIG. 2 is a schematic diagram of a hot water supply facility that requires a pre-opening air release valve.

FIG. 3 is a vertical cross-sectional front view of a pre-opening atmosphere release valve according to the present invention.

FIG. 4 is a vertical cross-sectional front view showing a state in which the atmosphere release valve of the above is opened.

FIG. 5 is a vertical sectional front view of another embodiment of the above.

FIG. 6 is a vertical sectional front view of still another embodiment of the same.

[Explanation of symbols]

A: Atmosphere opening valve for stop, B: Edge cutoff valve, a: Solar water heater, b: Boiler, c: Water supply pipe, d: Ball tap, e
・ F ・ g ... Piping, h ... Open / close valve, u ... Empty chamber, v ... Atmosphere opening valve, w ... Differential pressure extraction mechanism, X ... Primary chamber, Y ... Secondary chamber, Z ...
Tertiary chamber, 1 ... Valve box, 10 ... Water inlet, 11 ... Water outlet, 12
... atmosphere opening port 13, 13 partition wall, 14 flow path, 15 cylindrical portion, 2 main valve, 20 main valve seat, 21 sliding member, 22 spring, 3 check valve, 30 Check valve seat,
31 ... Spring, 4 ... Diaphragm, 50 ... Valve shaft, 51 ... Atmosphere opening valve seat, 52 ... Spring, 6 ... Case, 60 ... Set bolt, 61 ... Spring, 62 ... Adjusting screw, 63 ... Communication passage, 7 ... Check valve, 70 ... Check valve seat, 71 ... Spring, 7
2 ... Connection mechanism, 8 ... Operating rod, 80 ... Connection pipe, 9 ... Check valve, 90 ... Check valve seat, 91 ... Spring, 92 ... Communication passage.

Claims (4)

[Claims] 1. A valve box 1 having a water inlet 10 and a water outlet 11, a main valve 2, an atmosphere opening valve v, and a check valve 3 are assembled in that order from the upstream side, and the pressure on the primary side is set. And a differential pressure take-out mechanism w for taking out a differential pressure between the check valve 3 and a pressure downstream of the check valve 3, and the main valve 2 is controlled to open and close by a change in differential pressure taken out by the differential pressure take-out mechanism w. Atmospheric release valve for stop. 2. A valve box 1 having a water inlet 10 and a water outlet 11 is assembled with a main valve 2, an atmosphere release valve v, a check valve 3 and a second check valve 9 in that order from the upstream side. With
A differential pressure take-out mechanism w for taking out a differential pressure between the pressure between the check valve 3 and the second check valve 9 and the pressure downstream of the second check valve 9 is assembled. A pre-opening atmosphere release valve characterized in that the main valve 2 is controlled to open and close by the change in differential pressure taken out. 3. The main valve 2 and the atmosphere opening valve v are opened by the closing operation of the main valve 2 and the atmosphere opening valve v is closed by the opening operation of the main valve 2. The atmospheric release valve for stop according to claim 1, characterized in that they are connected to each other. 4. The main valve 2 and the atmosphere opening valve v are opened so that the atmosphere opening valve v is opened by the closing operation of the main valve 2 and the atmosphere opening valve v is closed by the opening operation of the main valve 2. The atmospheric release valve for stopping according to claim 2, wherein the atmospheric release valve is connected to each other.