JP2003130248A - Fluid valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a fluid valve device comprising a pilot solenoid valve. SOLUTION: This device comprises a passage body 10 for determining an inflow passage 11 and an outflow passage 13, a diaphragm valve 20 interposed between the inflow passage 11 and the outflow passage 13 for opening/closing the passage, a communication passage 16 for communicating a front pressure chamber RH and a back pressure chamber RL of the diaphragm valve 20, a pilot passage 14 for communicating the back pressure chamber RL and the outflow passage 13, the pilot solenoid valve 40 for opening/closing the pilot passage 14 and a flat plate type cover 30 connected with the passage body 10 in order to determine the back pressure chamber RL. The pilot solenoid valve 40 is connected with the passage body 10 in a region out of the cover 30 and a groove passage 33 is formed on the cover 30 for determining a part of the pilot passage. Thereby, the device is restricted from protruding above the back pressure chamber RL and the device can be miniaturized and thin- walled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid valve device for controlling the flow rate of fluid, and more particularly to a fluid valve device provided with a pilot solenoid valve electromagnetically driven and a diaphragm valve for opening and closing a passage for fluid.

[0002]

2. Description of the Related Art As a conventional fluid valve device for controlling the supply or discharge of water in a water heater, a washing machine or the like, for example, Japanese Patent Laid-Open No. 6-117570, Utility Model Registration No. 2
The one disclosed in Japanese Patent No. 519305 is known. The fluid valve devices disclosed in these publications control the pressure of a passage body that defines an inflow passage and an outflow passage of water, a diaphragm valve that is interposed between both passages to open and close the passage, and a back pressure chamber of the diaphragm valve. The diaphragm valve is provided with an electromagnetically driven pilot electromagnetic valve for opening and closing the diaphragm valve. These fluid valve devices are installed in, for example, an underfloor space or a side wall space of a house, or a limited space of equipment such as a washing machine, and control the flow rate of water or the like flowing through a pipe.

[0003]

However, in the above-described conventional fluid valve device, since the pilot solenoid valve is provided above the diaphragm valve on the side of the back pressure chamber, the inflow passage and the outflow passage extend in the extending direction. And has a structure protruding upward. Therefore, when connecting the fluid valve device having such a protruding shape to the pipe, even if the pipe itself can be arranged in a narrow space, a wide space is required to arrange the fluid valve device.

On the other hand, even if the pilot solenoid valve is not provided above the diaphragm valve on the side of the back pressure chamber, a pilot passage for connecting the pilot solenoid valve and the back pressure chamber is necessary. Even if it is defined by separate pipes or members that form pipe passages, it is not possible to suppress upward projection. Therefore, how to construct this pilot passage is important.

In the above conventional fluid valve device,
Since the valve seat of the pilot solenoid valve is formed on the passage body, the integrity (sealing property) between the pilot valve and the valve seat can be inspected only after the pilot solenoid valve is assembled to the passage body, which is not suitable. In this case, the valve seat must be disassembled and the valve seat must be reprocessed or the passage body itself must be discarded, resulting in unnecessary assembly and disassembly work.
It was not preferable in terms of productivity and manufacturing cost.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to reduce the number of parts, simplify the structure, modularize parts, etc. Another object of the present invention is to provide a fluid valve device capable of achieving downsizing, thinning, cost reduction, easy inspection, and improved productivity.

[0007]

The fluid valve device of the present invention comprises:
A passage body defining a fluid inflow passage and an outflow passage,
A diaphragm valve that is interposed between the inflow passage and the outflow passage to open and close the passage, a communication passage that connects the front pressure chamber and the back pressure chamber of the diaphragm valve, and a back pressure chamber and the outflow passage of the diaphragm valve. A fluid valve device having a pilot passage for opening and a pilot solenoid valve for opening and closing the pilot passage, the fluid valve device being coupled to a passage body to define the back pressure chamber and defining a part of the pilot passage. It is characterized in that it has a flat plate-shaped cover in which a groove passage is formed, and the pilot solenoid valve is connected to the passage body in a region outside the flat plate-shaped cover. According to this structure, the pilot solenoid valve is arranged in a region outside the flat plate-like cover, and the flat plate-like cover is formed with the groove passage for defining a part of the pilot passage. Therefore, the passage of the fluid can be secured while suppressing the protrusion of the cover to the outside. That is, by defining a part of the pilot passage by the groove passage instead of the pipe passage and suppressing the protrusion above the back pressure chamber, downsizing of the device,
Can be made thinner. As a result, it can be easily attached to a fluid pipe arranged in a narrow space.

In the above structure, the pilot passage comprises a first pilot passage extending substantially parallel to the reciprocating direction of the diaphragm valve and a second pilot passage extending substantially perpendicular to the reciprocating direction of the diaphragm valve. The pilot solenoid valve can adopt a configuration in which it is coupled to the passage body in the connection region between the first pilot passage and the second pilot passage. According to this configuration, the pilot passage is simplified to facilitate processing, and the pilot solenoid valve mounting hole can be simultaneously processed along with the processing of the pilot passage, and the opening end of the pilot passage is Since it is closed by the pilot solenoid valve, a dedicated plug or the like can be eliminated, and the manufacturing cost can be reduced, the structure can be simplified, and the number of parts can be reduced.

In the above structure, the pilot solenoid valve is
It is possible to adopt a configuration in which the reciprocating direction of the valve element is arranged so as to be located on substantially the same plane as the extending direction of the inflow passage and the outflow passage. According to this configuration, since the longitudinal direction of the pilot solenoid valve and the extending direction of the inflow passage and the outflow passage are located on substantially the same plane, the device can be made even thinner and a narrow space, for example, , Shallow underfloor space, water heater installed in narrow side wall space, piping for washing machines, etc.,
Alternatively, it can be easily attached to a pipe or the like provided in a narrow internal space such as a water heater or a washing machine.

In the above structure, the pilot passage can also serve as a part of the communication passage. With this structure, the number of passages provided in the passage body can be reduced, and the structure can be simplified, the device can be downsized, and the processing cost can be reduced.

In the above structure, there are a plurality of diaphragm valves interposed between the inflow passage and the outflow passage to open and close the passages, and the plurality of diaphragm valves are formed by one pilot solenoid valve connected to the passage body. It can be driven and configured. According to this configuration, it is possible to increase the flow rate of the fluid due to the opening operation of the diaphragm valve while reducing the size of the device and saving power.

Further, in the above-mentioned structure, there are two diaphragm valves which are interposed between the inflow passage and the outflow passage and are opposed to each other to open and close the passage, and the back pressure chambers of the two diaphragm valves are provided. A configuration can be employed that has two covers coupled to the passage body to define and one pilot solenoid valve to open and close two diaphragm valves. According to this configuration, the two diaphragm valves and the two covers that face each other with the passage body interposed therebetween are provided.
Since the pilot solenoid valve can be connected to the passage body, the flow rate can be increased, the power consumption can be saved, and the device can be further downsized.

In the above structure, the pilot solenoid valve is
It is possible to adopt a configuration having a communication passage forming a part of the pilot passage and a valve seat for opening and closing the communication passage by the valve body coming into contact with and separating from the communication passage. According to this configuration, since the pilot solenoid valve can be managed as a module product and the compatibility between the valve body and the valve seat can be inspected, wasteful assembly and disassembly work is eliminated, and productivity is improved. .

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4
FIG. 1 shows an embodiment of a fluid valve device according to the present invention. This fluid valve device includes a passage body 10 defining an inflow passage and an outflow passage for a fluid (here, water), a diaphragm valve 20 mounted in the passage body 10, and a passage for defining a back pressure chamber of the diaphragm valve 20. A cover 30 connected to the body 10 and a pilot solenoid valve 40 connected to the passage body 10 are provided.

As shown in FIGS. 1 and 2, the passage body 10 includes an inflow passage 11 extending rearward in FIG. 1, a cylindrical opening 12 opening upward in a substantially central portion, and a cylindrical opening 12. Outflow passage 1 extending in a substantially horizontal direction L
3, a pilot passage 14 that connects the back pressure chamber RL and the outflow passage 13, a flange portion 15 to which the pilot solenoid valve 40 is attached, and the like are defined. In addition, flange portions 11a and 13a for connecting to a pipe are formed at the open end portions of the inflow passage 11 and the outflow passage 13.

Above the passage body 10, FIGS.
As shown in FIG. 3, a flat plate-shaped cover 30 is connected, a diaphragm chamber DR is defined so as to surround the cylindrical opening 12, and the diaphragm valve 20 reciprocates in the vertical direction V to open and close the cylindrical opening 12. It is located in. The diaphragm chamber DR is formed by a front pressure chamber RH on the lower surface side of the diaphragm valve 20 and communicating with the inflow passage 11, and a back pressure chamber RL on the upper surface side.

Further, the passage body 10 has a structure shown in FIGS.
As shown in FIG. 1, the first pilot passage 14a that extends substantially parallel to the reciprocating direction V of the diaphragm valve 20 and communicates with the back pressure chamber RL, and the outflow passage that is substantially perpendicular to the reciprocating direction V of the diaphragm valve 20. A second pilot passage 14b that extends substantially parallel to the extension direction L of 13 and communicates with the outflow passage 13.
Is formed, and the first pilot passage 14a and the second pilot passage 14b form a pilot passage 14 that connects the back pressure chamber RL and the outflow passage 13 with each other.

Further, the passage body 10 has a front pressure chamber RH.
Communication passage 16 for connecting the first pilot passage 14a with the first pilot passage 14a
Are formed. That is, the communication passage 16 and the first pilot passage 14a form a communication passage that communicates the front pressure chamber RH and the back pressure chamber RL. By making the first pilot passage 14a also serve as the communication passage, The structure can be simplified, the device can be downsized, and the processing cost can be reduced.

As shown in FIGS. 1 and 2, the diaphragm valve 20 is composed of a diaphragm 21 which is elastically deformable and a pressure plate 22. The pressure plate 22 is formed with a guide hole 22b guided by a guide 31 described later. The diaphragm 21 has a seal portion 21a formed in the outer peripheral region thereof.
It not only separates and seals the front pressure chamber RH and the back pressure chamber RL, but also has a function of sealing around the first pilot passage 14a. Therefore, the first pilot passage 14
The number of parts can be reduced compared to the case where a dedicated seal is provided around a.

The diaphragm valve 20 having the above structure is
When the pressure acting from the back pressure chamber RL side is large, the cylinder opening 12 is closed by moving downward as shown in FIG.
The communication between the inflow passage 11 and the outflow passage 13 is cut off,
When the pressure acting from the front pressure chamber RH side is large, it moves upward as shown in FIG. 2 to open the cylindrical opening 12,
The inflow passage 11 and the outflow passage 13 are communicated with each other.

As shown in FIG. 3, the cover 30 is composed of a flat plate formed in a flat plate shape, and inside thereof, a guide 31 protruding from a substantially central portion and a diaphragm valve 20 cooperate with each other to form a back pressure chamber. A recess 32 that defines RL and a groove passage 33 that communicates the back pressure chamber RL with the first pilot passage 14a and defines a part of the pilot passage are formed. Further, a flange portion 34 joined to the passage body 10 is formed in the outer peripheral region. In this way, the cover 30 is formed as a flat plate having a flat plate shape, and the cover 30 is inflated in order to secure a passage area for communicating the back pressure chamber RL with the first pilot passage 14a. Rather than a pipe passage, the cover 30
By forming the groove passage 33 with a flat shape,
A necessary passage area can be secured while suppressing the protrusion of the cover 30 to the outside and maintaining the flatness, and the entire device can be miniaturized and thinned.

A fitting hole 15a for fitting the pilot solenoid valve 40 is formed in the flange portion 15 of the passage body 10. The fitting hole 15a is coaxial with the second pilot passage 14b, and also the first pilot passage 14a.
It also communicates with. Therefore, the first pilot passage 1
4b and the fitting hole 15a can be simultaneously processed by a stepped cutting tool or the like, and the manufacturing process can be simplified.
Since the communication passage 16 also extends in the same direction as the second pilot passage 14b and the fitting hole 15a, the setup of the machining process can be simplified.

It is further preferable that the pilot solenoid valve 40 has its extension direction (the reciprocating direction of the valve body 42 described later) with respect to the fitting hole 15a substantially parallel to the extension direction of the outflow passage 13. Are arranged such that the central axis of the outflow passage 13 and the central axis of the pilot solenoid valve 40 are located on substantially the same plane. That is, the pilot solenoid valve 40 is in a state of being connected to the passage body 10 in a region separated from the cover 30, and by being arranged in this manner, the height of the main body of the apparatus is reduced, and the overall size of the apparatus is reduced. It is made thinner.

As shown in FIG. 4, the pilot solenoid valve 40 has a cylindrical tubular member 41 forming a magnetic path, a valve body 42 arranged reciprocally in the tubular member 41, and a valve body 42 closed. Spring 43 for urging in the direction, coil 4 for excitation
4, a passage 45 located at the tip of the tubular member 41 and extending in the reciprocating direction of the valve body 42, a side wall hole 46 formed on the side surface of the tubular member 41 for communicating the internal space of the tubular member 41 to the outside, the valve body 42 Valve seat 47 on which the tip portion 42a made of rubber or the like is seated
Etc.

Regarding the operation of the pilot solenoid valve 40,
First, in the state where the coil 44 is not energized, as shown in FIG.
As shown in FIG. 3, the valve element 42 is pushed by the biasing force of the spring 43 and seats on the valve seat 47, closing the passage 45. Therefore, the passage 45 and the inner space of the tubular member 41 and the side wall hole 46 are blocked from each other. On the other hand, coil 4
4 is energized, as shown in FIG. 4B, the generated electromagnetic force causes the valve element 42 to move in the opposite direction against the urging force of the spring 43 and move away from the valve seat 47, so that the passage Four
5 is open. Therefore, the passage 45 and the tubular member 41
The internal space and the side wall hole 46 are in communication with each other.

As described above, in the pilot solenoid valve 40, since the valve seat 47 on which the valve body 42 is seated is integrally formed, the consistency (sealing property) between the valve body 42 and the valve seat 47 is inspected. In addition, the pilot solenoid valve 40 alone can be used for management. Therefore, if the consistency is poor, the pilot solenoid valve 40 alone can be replaced. This allows the passage body 1 which is the other side of the assembly.
The yield of 0 is improved, and the productivity is improved as a whole.

Next, the operation of the fluid valve device will be described with reference to FIGS. 1 and 2. First, in the state where the pilot solenoid valve 40 is not operated (non-energized),
As shown in, the valve element 42 of the pilot solenoid valve 40 is seated on the valve seat 47, and the pilot passage 14 (between the first pilot passage 14a and the second pilot passage 14b) is closed.

At this time, the pressure in the inflow passage 11 also acts on the back pressure chamber RL via the front pressure chamber RH, the communication passage 16 and the first pilot passage 14a, and the front pressure chamber RH and the back pressure chamber RL are separated from each other. Has the same pressure, but since the pressure receiving area on the back pressure chamber RL side is large, the diaphragm valve 20 is pushed downward and seated in the cylindrical opening 12 to close the passage.
As a result, the flow of water from the inflow passage 11 to the outflow passage 13 is blocked.

On the other hand, when the pilot solenoid valve 40 is operating (energized), the valve body 42 of the pilot solenoid valve 40 separates from the valve seat 47, as shown in FIG. Thereby, the first pilot passage 14a, the communication passage 16, the side wall hole 4
6, the passage 45 and the second pilot passage 14b are in communication with each other, and the water in the back pressure chamber RL and the front pressure chamber RH is discharged to the outflow passage 13 through the pilot passage 14. As a result, the pressure in the back pressure chamber RL decreases, and the diaphragm valve 20 moves upward due to the water pressure in the inflow passage 11 to separate from the cylindrical opening 12 and open the passage. This allows
Water flows out from the inflow passage 11 toward the outflow passage 13.

The above fluid valve device, as shown in FIG.
Compared to conventional products, it is lower in height and thinner,
Whereas conventional products required a space of height To, height T
It can be easily arranged even in a narrow space defined by the lower surface D and the upper surface U of n.

FIG. 6 shows a fluid valve device according to another embodiment in which a part of the embodiment shown in FIGS. 1 to 4 is modified, and the same components are designated by the same reference numerals. The description is omitted. In this fluid valve device, as shown in FIG. 6, a groove passage 33 'formed in the cover 30'.
Is formed in a deeper rectangular shape, and the first pilot passage 14
The area near the opening of a is widened. The operation of this fluid valve device is basically the same as that of the above-described embodiment, but particularly, from the back pressure chamber RL to the first pilot passage 14a or from the communication passage 16 and the first pilot passage 14a to the back pressure chamber RL. The flow resistance of the water is reduced by the amount of increase in the passage area of the groove passage 33 ', resulting in a smoother flow and better responsiveness. Also in this device, the pilot solenoid valve 40 is connected to the passage body 110 in a region separated from the flat plate-shaped cover 30 '.
Further, since the pilot passage is partly defined by the groove passage 33 'formed in the cover 30', the entire apparatus can be made smaller and thinner.

FIG. 7 shows another embodiment of the fluid valve device according to the present invention. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. In this fluid valve device, as shown in FIG. 7, an inflow passage 11 extending in the horizontal direction L and an outflow passage 113 extending in the vertical direction V are defined by a passage body 110. That is, the diaphragm valve 20 'is adapted to open and close the cylindrical opening 12 located above the outflow passage 113 extending downward. The second pilot passage 14b and the fitting hole 15a are formed so as to extend substantially parallel to the extension direction L of the inflow passage 11. Therefore, when the pilot solenoid valve 40 is attached to the fitting hole 15a, the central axes of the respective pilot solenoid valves 40 are arranged along substantially the same plane. That is, the pilot solenoid valve 40 is connected to the passage body 110 in a region outside the flat plate-shaped cover 30 ', and a part of the pilot passage is defined by the groove passage 33' formed in the cover 30 '. Therefore, the entire device is downsized and thinned.

In this fluid valve device, when the pilot solenoid valve 40 operates to open the pilot passage 14,
The water in the back pressure chamber RL is discharged to the outflow passage 113 via the pilot passage 14. As a result, the pressure in the back pressure chamber RL decreases, and the diaphragm valve 20 'moves upward to separate from the cylindrical opening 113a and open the passage. This allows
Water flows out from the inflow passage 11 toward the outflow passage 113.

On the other hand, when the pilot solenoid valve 40 is deactivated and the pilot passage 14 is closed, from the inflow passage 11 to the front pressure chamber RH, the communication passage 16 and the first pilot passage 14a.
The water flows into the back pressure chamber RL via the valve, and the pressures in the inflow passage 11 and the back pressure chamber RL become substantially the same, but since the pressure receiving area on the back pressure chamber RL side is large, the diaphragm valve 20 'faces downward. To block the cylindrical opening 113a, and the flow of water is stopped.

This fluid valve device has a space limitation above the cover 30 'and is suitable for installation in a place where drainage is performed downward. For example, drainage of a water heater, a washing machine, etc. It is preferably applicable to piping and the like.

FIG. 8 shows a fluid valve device obtained by partially modifying the embodiment shown in FIG. 7. The same components are designated by the same reference numerals and the description thereof will be omitted. In this fluid valve device, as shown in FIG. 8, an inflow passage 111 ′ extending in the vertical direction V and an outflow passage 113 ′ extending in the horizontal direction L are defined by a passage body 110 ′. Then, the diaphragm valve 20 ′ is provided with the outflow passage 113.
A cylindrical opening 112 that communicates with ′ and opens upward is opened and closed, and the inflow passage 111 ′ opens downward from the front pressure chamber RH in the vertical direction V. In addition, the inflow passage 111 ′ has a screw 111 a ′ for connection to the outer peripheral portion.
Is formed, and the filter 111b is arranged inside.

In this fluid valve device, when the pilot solenoid valve 40 operates to open the pilot passage 14,
The water in the back pressure chamber RL is discharged to the outflow passage 113 ′ via the pilot passage 14. As a result, the pressure in the back pressure chamber RL decreases, and the diaphragm valve 20 'moves upward to separate from the cylindrical opening 112 and open the passage. This allows
Water flows out from the inflow passage 111 'toward the outflow passage 113'.

On the other hand, when the pilot solenoid valve 40 is deactivated and the pilot passage 14 is closed, the inflow passage 111
', The front pressure chamber RH, the communication passage 16 and the first pilot passage 1
Water flows into the back pressure chamber RL via 4a, and the inflow passage 11
Although the pressure in the back pressure chamber RL is substantially the same as that in the back pressure chamber RL, the diaphragm valve 20 'has a large pressure receiving area on the back pressure chamber RL side.
Moves downward to close the cylindrical opening 112 and the water flow is stopped.

In this fluid valve device as well, the pilot solenoid valve 40 is connected to the passage body 110 'in the region outside the flat plate cover 30', and the cover 30 is also provided.
Since a part of the pilot passage is defined by the groove passage 33 'formed in ′, the entire device can be downsized and thinned. Therefore, there is a space restriction above the cover 30 ', and it is particularly suitable for installation in a place where water is supplied from below and flows out in the horizontal direction. For example, in a pipe of a water heater, a washing machine, or the like. It is preferably applicable.

FIG. 9 shows a modification of the embodiment shown in FIGS. 1 to 4 in which the mounting direction of the pilot solenoid valve 40 and the like are changed. The same components are designated by the same reference numerals and their description is omitted. To do. In this fluid valve device, as shown in FIG. 9, the fitting hole 15a 'is formed downward, and the pilot solenoid valve 40 has its extension direction (valve element 42).
(Reciprocating direction of) is parallel to the vertical direction V, that is, parallel to the first pilot passage 14a. Also, here, the passage body 10 '
Is not provided with a communication passage that connects the front pressure chamber RH and the first pilot passage 14a, and the front pressure chamber RH and the back pressure chamber R are not provided.
Communication with L is performed only by the communication passage 22a formed in the diaphragm valve 20.

In this fluid valve device, when the pilot solenoid valve 40 operates to open the pilot passage 14,
Water in the back pressure chamber RL is discharged to the outflow passage 13 via the pilot passage 14 (first pilot passage 14a and second pilot passage 14b). As a result, the pressure in the back pressure chamber RL decreases, the diaphragm valve 20 moves upward to open the cylindrical opening 12, and the inflow passage 11 to the outflow passage 13 are opened.
Water flows toward.

On the other hand, when the pilot solenoid valve 40 is deactivated and the pilot passage 14 is closed, the water in the inflow passage 11 and the front pressure chamber RH flows into the back pressure chamber RL through the communication passage 22a, and the inside of the inflow passage 11 and the back pressure chamber RL are closed. Although the pressure in the pressure chamber RL is substantially the same, since the pressure receiving area on the back pressure chamber RL side is large, the diaphragm valve 20 moves downward to close the cylindrical opening 12 and stop the flow of water.

In this fluid valve device as well, the pilot solenoid valve 40 is connected to the passage body 10 ′ in the region outside the flat plate-shaped cover 30 and the pilot passage is formed by the groove passage 33 formed in the cover 30 in the same manner as described above. Since a part of the device is defined, the entire device can be made smaller and thinner. Therefore, in particular, in a place where there is a space restriction above the cover 30 and a slight space below the cover 30, for example, it is connected to a horizontally arranged pipe in a water heater, a washing machine, or the like. Suitable for

FIG. 10 shows still another embodiment of the fluid valve device according to the present invention. This fluid valve device is
A passage body 210 that defines a water inflow passage 211 and an outflow passage 213, two diaphragm valves 20 ′ mounted in the passage body 210, and two diaphragm valves 20.
Is provided with two covers 30 ′ connected to the passage body 210 and one pilot solenoid valve 40 connected to the passage body 210 to define the back pressure chamber RL.

As shown in FIG. 10, the passage body 210 includes an inflow passage 211 extending rearward in FIG. 10, two cylindrical openings 212a, 212b opening upward and downward at a substantially central portion, and a cylindrical opening. Parts 212a, 212
It is formed so as to define an outflow passage 213 extending in the horizontal direction L from b, a pilot passage 214, a flange portion 215 for attaching the pilot solenoid valve 40, and the like. still,
Flange portions 211a and 213a for connecting to a pipe are formed at the open end portions of the inflow passage 211 and the outflow passage 213.

As shown in FIG. 10, two flat plate-shaped covers 30 'are coupled to the upper and lower sides of the passage body 210, and the respective diaphragm chambers DR are defined so as to surround the cylindrical openings 212a and 212b. The respective diaphragm valves 20 'are arranged so as to reciprocate in the vertical direction V to open and close the cylindrical openings 212a, 212b. A common (single) front pressure chamber RH and two back pressure chambers R are provided on the inner side of the diaphragm valve 20 '.
L and L are formed respectively.

Further, in the passage body 210, as shown in FIG. 10, two first pilot passages 214a extending substantially parallel to the reciprocating direction V of the diaphragm valve 20 'and communicating with the respective back pressure chambers RL. And a second pilot passage 214b extending substantially perpendicularly to the reciprocating direction V of the diaphragm valve 20 'and substantially parallel to the extension direction L of the outflow passage 213 and communicating with the outflow passage 213. A pilot passage 214 that connects the back pressure chamber RL and the outflow passage 213 is formed by the passage 14a and the second pilot passage 14b.

Further, the passage body 210 has a front pressure chamber R
A communication passage 16 that connects the H and one of the first pilot passages 214a is formed. Since the other first pilot passage 214a communicates with the one first pilot passage 214a through the fitting hole 215a, the communication passage 21
It is in a state of communicating with 6. The pilot solenoid valve 40 is fitted in the fitting hole 215a, and its extension direction is the same as the extension direction L of the outflow passage 213.

In this fluid valve device, when the pilot solenoid valve 40 is actuated to open the pilot passage 214, the water in the two back pressure chambers RL is discharged into the pilot passage 214 (two first pilot passages 214a and a second pilot passage 214a). It is discharged to the outflow passage 213 via 214b). As a result, the pressure in the back pressure chamber RL is reduced, and the two diaphragm valves 20 'move to move the cylindrical openings 212a,
The passage is opened away from 212b, and water flows out from the inflow passage 211 toward the outflow passage 213. In this case, since the two cylindrical openings 212a and 212b are opened, the flow rate can be increased as compared with the case where one cylindrical opening is opened.

On the other hand, when the pilot solenoid valve 40 is deactivated and the pilot passage 214 is closed, the inflow passage 211 is closed.
And the water in the front pressure chamber RH flows into the respective back pressure chambers RL via the communication passage 216 and the two first pilot passages 214a, and the pressures in the inflow passage 211 and the back pressure chamber RL become substantially the same, Since the pressure receiving area on the side of the back pressure chamber RL is large, each diaphragm valve 20 moves to move to the cylindrical opening 21.
2a and 212b are closed and the flow of water is stopped.

According to this fluid valve device, the passage body 21
Two diaphragm valves 20 'and a flat plate-shaped cover 30' which face each other so as to sandwich 0 are provided, and a flat plate-shaped cover 30 'is provided.
Since one pilot solenoid valve 40 is connected to the passage body 210 in a region deviated from the above, and a part of the pilot passage is defined by the groove passage 33 'formed in the cover 30', downsizing of the apparatus is achieved. It is possible to reduce the power consumption and increase the flow rate while reducing the thickness. Therefore, as shown in FIG. 5, this fluid valve device is also connected to pipes of a water heater, a washing machine, etc., which require a particularly large flow rate, in places where there are space restrictions above and below the cover 30 '. Suitable for In the fluid valve device shown in FIG. 10, the cylindrical openings 212a and 212b are communicated with each other and the outflow passage 213 is made one.
A structure may be adopted in which two outflow passages are provided and two outflow destinations are provided without connecting the 12b.

In the above embodiment, the mounting position and direction of the pilot solenoid valve 40 are substantially parallel to the extension direction of the inflow passage or the outflow passage formed in the passage body.
The present invention is not limited to this, and may be attached at a slight inclination with respect to the passage body as long as the position is outside the covers 30 and 30 'that define the back pressure chamber of the diaphragm valve.

Further, in the fluid valve device shown in FIG. 10, the two diaphragm valves 20 'and the cover 30' are adopted as the plurality of diaphragm valves and the cover, but the invention is not limited to this and one pilot electromagnetic valve is used. Valve 4
As long as it is driven at 0, three or more diaphragm valves and covers may be adopted.

Further, in the above embodiment, the case where the fluid valve device is applied to a water pipe, a water pipe, etc. in a water heater, a washing machine, etc. is shown, but the invention is not limited to this. It can be applied to devices that control fluids other than water, such as when the installation space is limited, and is not limited to installation in horizontal pipes, but can be installed in narrow spaces such as side wall spaces. It is also installed in the installed pipe.

[0055]

As described above, according to the fluid valve device of the present invention, in the passage body that defines the inflow passage and the outflow passage, a flat plate shape that defines the back pressure chamber of the diaphragm valve that opens and closes both passages is provided. A cover is provided, a pilot solenoid valve for controlling the opening and closing of the diaphragm valve is arranged in a region outside the flat cover, and a flat passage is provided with a groove passage for defining a part of the pilot passage. As a result, it is possible to suppress the protrusion of the device above the back pressure chamber, and to reduce the size and thickness of the device, which makes it possible to easily arrange the device in a narrow space. The pilot passage is formed by a first pilot passage extending substantially parallel to the reciprocating direction of the diaphragm valve and a second pilot passage extending substantially perpendicular to the reciprocating direction of the diaphragm valve. First pilot passage and second
By connecting to the connection area with the pilot passage, the pilot passage can be simplified and the processing becomes easy, and the mounting fitting hole of the pilot solenoid valve can be simultaneously processed together with the processing of the pilot passage. As a result, the manufacturing cost can be reduced, the structure can be simplified, and the number of parts can be reduced by eliminating the plug and the like. Also, by driving a plurality of diaphragm valves with one pilot solenoid valve, while downsizing the device,
It is possible to save power and increase the flow rate. Furthermore, by integrally forming a valve seat that opens and closes the communication passage with the pilot solenoid valve that comes into contact with and separates from it, it can be managed as a module product, and can be separated from the passage body to separate the valve body and valve seat. Since it is possible to inspect the consistency with and the like, useless assembling and disassembling work is eliminated, and productivity is improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a fluid valve device according to the present invention.

FIG. 2 is a cross-sectional view showing a state where a pilot solenoid valve is operating in the fluid valve device shown in FIG.

3A and 3B show a cover coupled to a passage body, FIG. 3A is a plan view showing the inside, and FIG. 3B is a sectional view taken along the line AA.

4A and 4B are views showing a pilot solenoid valve connected to a passage body, wherein FIG. 4A is a sectional view showing a state in which a valve body is seated on a valve seat, and FIG. 4B is a state in which the valve body is separated from the valve seat. FIG.

FIG. 5 is a side view illustrating a state in which the fluid valve device is arranged in a predetermined space.

FIG. 6 is a cross-sectional view showing another embodiment of the fluid valve device according to the present invention.

FIG. 7 is a sectional view showing another embodiment of the fluid valve device according to the present invention.

FIG. 8 is a cross-sectional view showing another embodiment of the fluid valve device according to the present invention.

FIG. 9 is a sectional view showing another embodiment of the fluid valve device according to the present invention.

FIG. 10 is a cross-sectional view showing another embodiment of the fluid valve device according to the present invention.

[Explanation of symbols]

RH front pressure chamber RL back pressure chamber 10, 10 ', 110, 110', 210 passage body 11,111,111'211 inflow passage 13,113,113'213 Outflow passage 14,214 Pilot passage 14a, 214a First pilot passage 14b, 214b Second pilot passage 15,215 Flange part 15a, 15a ', 215a Fitting holes 16,22a, 216 Communication passage 20, 20 'diaphragm valve 21 diaphragm 21a Seal part 22,22 'Pressure plate 22a communication passage 30,30 'cover 33,33 'groove passage 40 pilot solenoid valve 42 valve 45 passage 46 Side wall hole 47 seat

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Fumitaka Yokozawa             309 Toyama, Takizawa, Takizawa-mura, Iwate-gun, Iwate Prefecture             Within Mikuni Adec (72) Inventor Mitsuru Kawamura             309 Toyama, Takizawa, Takizawa-mura, Iwate-gun, Iwate Prefecture             Within Mikuni Adec F term (reference) 3H056 AA07 BB32 CA07 CB02 CB09                       CC03 CC12 CD06 DD02 GG05

Claims (7)

[Claims] 1. A passage body which defines an inflow passage and an outflow passage for a fluid, a diaphragm valve which is interposed between the inflow passage and the outflow passage to open and close the passage, a front pressure chamber and a back pressure of the diaphragm valve. A fluid valve device comprising: a communication passage that communicates with a chamber, a pilot passage that communicates the back pressure chamber of the diaphragm valve with the outflow passage, and a pilot solenoid valve that opens and closes the pilot passage. A flat plate cover coupled to the passage body for defining a back pressure chamber and having a groove passage formed therein for defining a part of the pilot passage; A fluid valve device, wherein the fluid valve device is connected to the passage body in a disengaged region. 2. The pilot passage includes a first pilot passage extending substantially parallel to the reciprocating direction of the diaphragm valve, and a second pilot passage extending substantially perpendicular to the reciprocating direction of the diaphragm valve. The fluid valve device according to claim 1, wherein the pilot solenoid valve is coupled to the passage body in a connection region between the first pilot passage and the second pilot passage. 3. The pilot solenoid valve is arranged such that the reciprocating direction of its valve body is located substantially on the same plane as the extending direction of the inflow passage and the outflow passage. Item 3. The fluid valve device according to item 1 or 2. 4. The fluid valve device according to claim 1, wherein the pilot passage also serves as a part of the communication passage. 5. A plurality of diaphragm valves are provided between the inflow passage and the outflow passage to open and close the passage, wherein the plurality of diaphragm valves are one of the pilot solenoids connected to the passage body. 5. The fluid valve device according to claim 1, wherein the fluid valve device is driven by a valve. 6. A back pressure chamber for the two diaphragm valves, the two diaphragm valves being interposed between the inflow passage and the outflow passage and facing each other to open and close the passage. The fluid valve device according to claim 5, further comprising: two covers, which are coupled to the passage body, and one pilot solenoid valve, which opens and closes the two diaphragm valves. 7. The pilot solenoid valve includes a communication passage that forms a part of the pilot passage, and a valve seat that opens and closes the communication passage when the valve body comes into contact with and separates from the valve seat. The fluid valve device according to any one of claims 1 to 6.