JP3719577B2 - Pressure chamber valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure chamber valve that is preferably used as an open / close valve of an automatic faucet, a toilet automatic cleaning device, and the like, and more particularly to a pressure chamber valve having a pressure chamber fluid discharge function.
[0002]
[Prior art]
Conventionally, for example, a diaphragm valve as shown in FIG. 6 is known as a pressure chamber type valve used in this type of on-off valve.
[0003]
That is, a diaphragm valve body having a diaphragm arranged on the primary side of the flow path and a diaphragm receiving body provided through the central portion of the diaphragm, and a secondary by the diaphragm valve body communicating with the primary side through a bleed hole It is a diaphragm valve provided with a pressure chamber that is blocked from the side, and a pilot hole that communicates the pressure chamber and the secondary side.
[0004]
This functions to control the opening and closing of the pilot hole to control the pressure in the pressure chamber and to open and close the diaphragm valve by controlling the pressure acting on each part of the diaphragm valve and the force proportional to the pressure receiving area. .
[0005]
For this purpose, for the purpose of preventing breakage due to freezing, etc., air discharge is performed by opening a discharge port (not shown) and a secondary water discharge port provided in the primary flow path, and manually pushing up the diaphragm valve. , The fluid in the flow path can be discharged.
[0006]
[Problems to be solved by the invention]
However, since the pilot diameter of the pressure chamber is inevitably small and effective air exchange is hindered by the surface tension, it is difficult to discharge the fluid in the pressure chamber out of the flow path, and the vicinity of the spout is below freezing point. Under such severe conditions, the valve may break due to freezing.
In order to prevent this, it has been necessary to take measures such as constantly flowing a small flow rate or warming a pipe near the water outlet, which was a waste of resources.
In addition, when trying to control a fluid such as a chemical, it is not preferable that the chemical stays in the flow path. Therefore, it has been required to discharge all the fluid in the pressure chamber. It was difficult to discharge the fluid out of the flow path.
[0007]
The present invention has been made to solve the above problems, and an object of the present invention is to provide a pressure chamber type valve that can discharge a fluid in the pressure chamber with a simple operation.
[0008]
[Means for solving the problems and actions / effects]
In order to achieve the above object, the present invention communicates with a primary side by a flow path, a valve seat provided in the middle of the flow path, a main valve element disposed on the primary side of the flow path, and a bleed hole. A pressure chamber that is blocked from the secondary side by the main valve body, and a control mechanism that controls opening and closing of a pilot hole that communicates the pressure chamber and the secondary side. A feature is provided that discharges the fluid in the room to the secondary side.
[0009]
According to such a configuration, the main valve body is provided with a function of discharging the fluid in the pressure chamber, so that the fluid in the pressure chamber can be discharged with a simple operation, and the pressure can be reduced to reduce the number of parts. A chamber valve can be provided.
[0010]
Further, if the discharge function portion is sealed with a seal member, it is possible to reliably prevent malfunction when it is not desired to operate the discharge function.
[0011]
Further, if the manual operation portion is sealed with a seal member, it is possible to reliably prevent fluid from leaking out of the flow path when not necessary.
[0012]
Further, if the discharge function section is guided on the vertical axis by the manual operation section, the fluid in the pressure chamber can be discharged to the secondary side flow path only by the gravitational action, and the discharge function section at the end of the discharge function operation. Can be reliably returned to a predetermined position of the main valve body.
[0013]
Further, if the manual operation section is provided with a discharge hole for discharging the fluid and the manual operation section seal member is positioned so as not to seal the flow path and the outside of the flow path when the discharge function is operated, Even when the fluid cannot be discharged from the secondary side of the passage, the fluid in the pressure chamber can be reliably discharged out of the flow path.
[0014]
Further, the manual operation section is provided with a discharge hole for discharging the fluid, and when the discharge function is operated, the manual operation section seal member can arbitrarily set the position where the manual operation section seal member seals the flow path and the outside of the flow path. If it can comprise, it can select arbitrarily the function as a manual on-off valve in the position which seals, and the pressure chamber fluid discharge function in the position which does not seal.
[0015]
Further, if the discharge function part is biased by a biasing member sandwiched between the discharge function part and the inner wall of the pressure chamber, the difference between the primary pressure and the secondary pressure can be achieved with a simple configuration. Even when the pressure is low, the discharge function can be prevented from malfunctioning, and the discharge function can be reliably returned to the state where the discharge function is not activated when the discharge function is finished.
[0016]
Further, if the discharge function portion is provided with a pilot hole communicating with the pressure chamber and the secondary side, it can function as a main valve interlocking on-off valve that can be controlled to open and close with a small force.
[0017]
Further, if the discharge function portion is simultaneously energized by the energizing member and the valve body energizing member of the pilot type main valve interlocking on-off valve, the differential pressure between the primary pressure and the secondary pressure is small. Even when the discharge function is malfunctioning, it is possible to more reliably prevent malfunction, and when the discharge function is finished, it is possible to more reliably return to a state where the discharge function is not activated.
[0018]
Further, if the discharge function part is urged only by the valve body urging member of the main valve interlocking on-off valve, the number of parts can be reduced and the fluid discharge function in the pressure chamber can be obtained with a simple configuration. .
[0019]
DETAILED DESCRIPTION OF THE INVENTION
In order to make the content of the present invention easier to understand, the following description will be made based on the illustrated diaphragm valve as a representative example.
[0020]
【Example】
FIG. 1 is a sectional view of an electromagnetic valve using a diaphragm valve according to a first embodiment of the present invention.
[0021]
As shown in FIG. 1, the primary flow path 1 is provided with an elastic diaphragm 2, a diaphragm receiver 3 provided through the central part of the diaphragm 2, and a central part of the diaphragm receiver 3. A diaphragm valve body 5 having a discharge function portion 4 that is coaxially accommodated in the through-hole 3a is disposed.
[0022]
The diaphragm receiver 3 and the discharge function part 4 are formed of a rigid material such as a synthetic resin, and the pressure chamber 6 and the secondary flow path 7 are provided between the diaphragm receiver 3 and the discharge function part 4. Is provided. A pilot hole 4 a that communicates the pressure chamber 6 and the secondary flow path 7 is formed at the center of the discharge function unit 4. Since the pilot hole 4a is closed by a valve seat packing 10 formed integrally with the plunger 9, the pressure in the pressure chamber 6 communicating with the primary flow path 1 is maintained at the primary pressure by the bleed hole 3b. ing. Due to the differential pressure between the pressure chamber 6 and the secondary side flow path 7, the diaphragm valve body 5 is pressed against the seat surface 11 a of the valve seat portion 11, and the primary side flow path 1 and the secondary side flow path 7 are blocked. It is still water.
[0023]
In this state, when the solenoid valve A is energized and the plunger 9 and the valve seat packing 10 are pulled up, the pilot hole 4a is opened, the pressure chamber 6 and the secondary side flow path 7 communicate with each other, and the pressure in the pressure chamber 6 suddenly increases. To drop. Therefore, the diaphragm valve body 5 is pushed up in the direction away from the seat surface 11a by the primary pressure, and the primary side flow path 1 and the secondary side flow path 7 communicate with each other to discharge water.
[0024]
Here, the diaphragm valve body 5 is provided with a discharge function portion 4 urged in a direction not separated from the diaphragm receiver 3 by the urging member 12, and can be moved by the operation of the manual operation portion 13. Yes. The manual operation unit 13 has an inside disposed vertically below the discharge function unit 4 and is assembled to a cylindrical pipe 14 of a female screw with a male screw, and is movable in the vertical direction by rotation. The side channel 7 and the outside of the channel are sealed.
[0025]
When the stop cock (not shown) on the upstream side of the primary flow path 1 is closed and the manual operation unit 13 is screwed vertically upward, the seal member 15 provided integrally with the manual operation unit 13 is similarly raised. As a result, the secondary side flow path 7 and the outside of the flow path are no longer sealed, and the fluid staying in the secondary side flow path 7 flows from the discharge hole 14a provided in the manual operation unit 13 by the gravity action. It is discharged outside.
[0026]
At the same time, since the discharge function section 4 is also separated from the diaphragm receiver 3 by the manual operation section 13, the fluid in the pressure chamber 6 also flows out of the flow path from the through hole 3a through the secondary side flow path 7 and the discharge steel 14a due to gravity. To be discharged.
[0027]
Further, when the manual operation unit 13 is rotated in the direction opposite to the above and moved vertically downward, the seal member 15 again seals the secondary side flow path 7 and the outside of the flow path, and discharges almost simultaneously. Since the functional unit 4 is also urged by the urging member 12 in the direction in contact with the diaphragm receiver 3, the pressure chamber 6 and the secondary side flow path 7 are sealed again.
[0028]
The seal member 8 may be provided integrally with either the diaphragm receiver 3 or the discharge function unit 4, and the seal member 15 is provided integrally with either the manual operation unit 13 or the cylindrical pipe 14. Further, the discharge hole 14 a may be provided in either the manual operation unit 13 or the cylindrical pipe 14. Further, the diaphragm valve body 5 may be a main valve separation type instead of the main valve interlocking type, and it is not necessary to use the electromagnetic valve A for the opening / closing mechanism of the pilot hole 4a.
[0029]
2 to 4 are cross-sectional views illustrating the operation of the first embodiment of the present invention using a main valve interlocking pilot type solenoid valve.
[0030]
FIG. 2 shows a state of a diaphragm valve as a normal on-off valve without operating the manual operation unit 13. Since the solenoid valve A is not energized and the plunger 9 is not attracted, the valve seat packing 10 closes the pilot hole 4a, and the diaphragm valve body 5 blocks the primary side flow path 1 and the secondary side flow path 7. It remains.
[0031]
FIG. 3 shows a state where the manual operation unit 13 is operated to the intermediate position 2. Since the seal member 15 keeps the secondary side flow path 7 and the outside of the flow path sealed, no fluid is discharged from the secondary side flow path 7 to the outside of the flow path. Since the discharge function unit 4 is pushed up in the direction away from the diaphragm receiver 3 by the manual operation unit 13, the fluid in the pressure chamber 6 is discharged to the secondary side flow path 7, and the pressure in the pressure chamber 6 is lowered. The valve body 5 is in an open state. Since the diaphragm valve body 5 can be manually opened and closed by operating the manual operation unit 13, it is used when the electromagnetic valve A cannot be operated due to a power failure or the like.
[0032]
FIG. 4 shows a state in which the stop cock (not shown) is closed and the manual operation unit 13 is operated to the final position 3. Since the seal member 15 does not seal the secondary side flow path 7 and the outside of the flow path, the fluid staying in the secondary side flow path 7 flows from the discharge hole 14 a provided in the manual operation unit 13 by gravity. It is discharged outside. At substantially the same time, since the discharge function unit 4 is also separated from the diaphragm receiver 3 by the manual operation unit 13, the fluid in the pressure chamber 6 also flows from the through hole 3a through the secondary side channel 7 and the discharge steel 14a by gravity. Discharged outside.
[0033]
FIG. 5 is a sectional view of a diaphragm valve according to the second embodiment of the present invention. The same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.
[0034]
As shown in FIG. 5, the difference from the first embodiment is that the urging member 12 is not present, and the urging force for urging the discharge function unit 4 in the direction in contact with the diaphragm receiver 3 is as follows. The urging member 16 uses a force that urges the plunger 9 toward the pilot hole 4a. If comprised in this way, a number of parts can be reduced and the fluid discharge function in a pressure chamber can be obtained with a simple structure.
[0035]
The contents described above relate to an embodiment of the present invention, and do not mean that the present invention is limited to the above contents. For example, although a diaphragm valve has been described as a pressure chamber type valve, even a piston valve operates in the same manner as a diaphragm valve.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a first embodiment showing a pressure chamber type valve of the present invention using a diaphragm valve.
FIG. 2 is a cross-sectional view for explaining the operation of a diaphragm valve as a normal on-off valve of the first embodiment and an indicator showing an operation position of a manual operation unit.
FIG. 3 is a cross-sectional view for explaining the operation of a diaphragm valve as a manual on-off valve according to the first embodiment and an indicator showing an operation position of a manual operation unit.
FIG. 4 is a cross-sectional view illustrating the operation of the diaphragm valve with a pressure chamber fluid discharge function according to the first embodiment, and an indicator diagram illustrating an operation position of a manual operation unit.
FIG. 5 is a cross-sectional view of a second embodiment showing a pressure chamber type valve of the present invention using a diaphragm valve.
FIG. 6 is a cross-sectional view of an example in which a conventional pressure chamber type valve is shown using a diaphragm valve.
[Explanation of symbols]
A ... Solenoid valve 1, 101 ... Primary side flow path 2, 102 ... Diaphragm 3, 103 ... Diaphragm receptacle 3a ... Through hole 3b, 103b ... Bleed hole 4 ... Discharge function part 4a, 104a ... Pilot hole 5, 105 ... Diaphragm Valve body 6, 106 ... Pressure chamber 7, 107 ... Secondary side flow path 8 ... Seal member 9, 109 ... Plunger 10, 110 ... Valve seat packing 11, 111 ... Valve seat portion 11a, 111a ... Seat surface 12 ... Biasing Member 13, 113 ... Manual operation part 14, 114 ... Cylindrical piping 14a, 114a ... Discharge hole 15, 115 ... Seal member 16 ... Energizing member

Claims (8)

A flow path, a valve seat provided in the middle of the flow path, a main valve element disposed on the primary side of the flow path, and a primary side that communicates with the primary side by the bleed hole and is blocked from the secondary side by the main valve element. In the pressure chamber type valve having a control mechanism for controlling the opening and closing of the pilot hole for communicating the pressure chamber and the pressure chamber and the secondary side,
It said main valve body, manually operated by the pressure chamber of the fluid, such a provided function portion for discharging to the secondary side Rutotomoni, the discharge function unit pressure integrally attached to said main valve body or the discharge function unit A sealing member that seals the chamber and the secondary side, a biasing member that biases the discharge function portion to the main valve body, a manual operation portion that manually operates the discharge function portion, and a manual operation portion that is a flow path. It consists of a sealing member that seals,
The discharge function unit is guided on the vertical axis by the manual operation unit, is separated from the main valve body by the vertical movement of the manual operation unit, and discharges the fluid in the pressure chamber by gravity. Pressure chamber type valve.   The manual operation section is held by a screw in a cylindrical pipe integrally extending vertically downward from the secondary side flow path, and fluid is supplied to at least one of the manual operation section and the cylindrical pipe. 2. The pressure chamber type valve according to claim 1, further comprising a discharge hole for discharging to the outside of the road.   The manual operation unit is such that when the manual operation unit is manually moved vertically upward and the discharge function unit is separated from the main valve body, the seal member of the manual operation unit does not seal the flow path and the outside of the flow path. The pressure chamber type valve according to claim 2, wherein the pressure chamber type valve is configured.   When the manual operation unit is manually moved vertically upward and the discharge function unit is separated from the main valve body, the manual operation unit does not seal the position where the seal member of the manual operation unit seals between the flow path and the outside of the flow path. 3. The pressure chamber type valve according to claim 2, wherein the position can be arbitrarily selected.   The pressure chamber type valve according to claim 1, wherein the urging member is sandwiched between a discharge function portion and an inner wall of the pressure chamber.   2. The pressure chamber type valve according to claim 1, wherein the discharge function section includes a pilot hole communicating with the pressure chamber and the secondary side.   The pressure chamber type valve according to claim 6, wherein the discharge function portion is urged to the main valve body by the urging member and the valve body urging member of the opening / closing control mechanism.   The pressure chamber type valve according to claim 1, wherein the discharge function portion is urged to the main valve body only by the valve body urging member of the opening / closing control mechanism.

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