JPS586103B2 - Open/close valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an on-off valve device for water supply, etc., which can be operated by opening and closing a small control on-off valve.

Generally, this type of on-off valve device is provided with a pressure receiving body that moves together with the valve body that opens and closes the valve port, a pressure chamber is formed on one side of this pressure receiving body, and this pressure chamber, the inflow chamber side of the valve body, and the umbrella orifice are connected. Furthermore, the pressure relief port formed in the pressure chamber and the outflow chamber side are communicated via a control on-off valve.

Then, by closing the control on-off valve, the pressure on the inflow chamber side is accumulated in the pressure chamber, and this pressure moves the pressure-receiving body, causing the valve body to close the valve port, and by opening the control on-off valve, The pressure inside the pressure chamber is released to the outflow chamber side, and the valve body is configured to open.

By the way, in such a device, when the control on-off valve is closed to bring it into a closed state, the valve body may suddenly seat itself, causing water hammer or the like.

In order to prevent such problems, a buffer chamber is formed on the other side of the pressure receiving body, and this buffer chamber and the outflow chamber are communicated via a one-way throttle valve. The structure is such that the water in the room flows out from the orifice hole of the one-way throttle valve, and the moving speed of the pressure receiving body and the valve body is regulated to prevent sudden seating.

However, air mixed into the water tends to accumulate in such a buffer chamber, and the accumulated air cannot be easily discharged, so there is a problem in that the operation of the buffer chamber is hindered by this air.

The present invention has been made based on the above circumstances, and its purpose is to form an air vent passage in the buffer chamber without affecting the operation of the entire on-off valve device.

That is, the configuration of the present invention is such that a pressure receiving body is connected to a valve body, a pressure chamber is formed on one side of the pressure receiving body, and the pressure on the inflow chamber side is introduced into this pressure chamber to open and close the valve body. A buffer chamber is formed on the other side of the pressure receiving body to regulate the opening/closing speed of the valve body, and an air vent passage communicating between the buffer chamber and the pressure outlet is provided, and this air vent passage is accessible from the buffer chamber. It is equipped with a check valve that only allows flow toward the force chamber.

Then, the air mixed in the buffer chamber is released to the pressure chamber through the air vent passage, ensuring the function of the buffer chamber, and pressure is introduced into the pressure chamber.In winter, the check valve allows the pressure in the pressure chamber to be This prevents the water from escaping into the buffer chamber.

Next, one embodiment of the present invention will be described based on the drawings.

This embodiment is an on-off valve device for water supply, and numeral 1 in the figure is a valve box.

In the valve box 1, an inflow chamber 2 connected to the inflow piping side and an outflow chamber 3 connected to the outflow piping side are formed,
These inflow chamber 2 and outflow chamber 3 are partitioned by a partition wall 4, and this partition wall 4 is formed with a valve port 5 that communicates the inflow chamber 2 and outflow chamber 3.

A valve body 6 is seated on the valve port 5 from above, that is, from the outflow chamber 3 side, and is configured to open and close the valve port 5.

Further, a strainer 7 is provided on the inflow chamber 2 side surrounding the valve port 5.

The strainer 7 is a cylindrical metal plate with many small holes formed therein, and is configured to remove relatively large foreign matter.

Further, a bottom wall member 8 and a lid body 9 are attached to the upper part of the valve box 1, and the bottom wall member 8 and the lid body 9 form a pressure receiving body storage chamber 10.

The valve shaft 11 of the valve body 6 slidably penetrates the center portion of the bottom wall member 8 and enters into the pressure receiving body chamber 10 .

A pressure receiving body 12 is attached to the tip of the valve shaft 11, and the pressure receiving body 12 is slidably fitted in the pressure receiving body chamber 10 in a watertight manner.

Note that 13 is an O-ring for maintaining watertightness.

The inside of the pressure receiving body storage chamber 10 is divided into two chambers by the pressure receiving body 12, and the upper side of the pressure receiving body 12 is formed as a pressure chamber 14, and the lower side is formed as a buffer chamber 15.

A one-way throttle valve 16 is attached to the bottom wall member 8, and the buffer chamber 15 and the outflow chamber 3 communicate with each other via the one-way throttle valve 16.

This one-way throttle valve 16 is a normal one-way valve with an orifice hole 18 formed in the valve body 17, and when the flow is in the direction from the outflow chamber 3 to the relaxation chamber 15, the valve body 17 is pushed up. The structure is such that a free flow is allowed, and when the flow is from the buffer chamber 15 toward the outflow chamber 3, the flow rate is regulated by the orifice hole 18.

Further, an air vent passage 19 is formed in the upper part of the valve shaft 11.

This air vent passage 19 is formed within the valve shaft 11, with one end opening on the upper surface of the valve shaft 11, and the lower end opening on the circumferential surface of the valve shaft 11.

The opening at the lower end is located above the buffer chamber 15, that is, more than half the height of the buffer chamber 15, and within 10 mm from the upper surface of the buffer chamber 15, that is, the lower surface of the pressure receiving body 12.

A steel ball 20 is provided in this air vent passage 19, and this steel ball 20 constitutes a check valve, allowing flow from the buffer chamber 15 to the pressure chamber 14, and preventing flow in the opposite direction. configured to prevent it.

Further, a relief pressure passage 21 is formed on the side of the valve box 1 .

This relief pressure passage 21 is configured such that one end thereof opens into the inflow chamber 2 and the other end is connected to the outflow chamber 3 side via an elbow 22 and a control on-off valve 23.

Further, the above-mentioned control on-off valve 23 is provided in the above-mentioned release pressure passage 21.
An orifice 24 is provided on the upstream side.

Further, a steel ball 25 is inserted into the orifice 24 to form a check valve, and is configured to prevent backflow from the outflow chamber 3 side to the inflow chamber 2 side.

Further, a branch passage 26 is provided branching off from the release pressure passage 21 between the orifice 24 and the control angle opening/closing valve 23, and this branch passage 26 communicates with the pressure chamber 14.

In one embodiment of the present invention configured as described above, when the control on-off valve 23 is closed, the pressure in the inflow chamber 2 is introduced into the pressure chamber 14 via the relief pressure passage 21 and the branch passage 26, and this pressure The pressure receiving body 12 is pushed down and the valve body 6 is seated on the valve port 5, and the valve is in a closed state.

Further, when the control on-off valve 23 is opened, the pressure in the inflow chamber 2 introduced into the relief pressure passage 21 is released to the outflow chamber 3.

The water then flows through the discharge pressure passage 21, but when it passes through the orifice 24, a pressure drop occurs, and the pressure downstream of the orifice 24 becomes low.

Therefore, the pressure in the pressure chamber 14 also decreases, and the pressing force acting on the pressure receiving body 12 also decreases.

Therefore, the valve body 6I/'i is pushed up by the pressure of the inflow chamber 2 acting on its lower surface, and becomes open.

When this valve device closes, water in the buffer chamber 15 is discharged little by little from the orifice hole 18 of the one-way throttle valve 16, so the downward speed of the pressure receiving body 12 and the valve body 6 is regulated. Prevents sudden valve closing and prevents the generation of water, etc.

In addition, when air flows into the buffer chamber 15 together with water, this air passes through the air vent passage 19 and flows into the pressure chamber 1.
4, air will not accumulate in the buffer chamber 15, and the function of the buffer chamber 15 will not be inhibited.

Further, since a steel ball 20 is provided in this air vent passage 19 and constitutes a check valve, when the valve is closed, that is, the control on-off valve 2
3 is closed and the pressure of the inflow chamber CE is introduced into the pressure chamber 14, this pressure will not escape from the air vent passage 19.

Furthermore, when the pressure in the pressure chamber 14 is released when the valve is opened, that is, when the control on-off valve 23 is open, the pressure in the pressure chamber 14 becomes almost the same as the pressure in the outflow chamber 3. Air vent passage 1
Water does not flow from the buffer chamber 15 to the pressure chamber 114 through the buffer chamber 9, and even if water should flow into the pressure chamber 14, the operation will not be affected.

Therefore, the provision of this air vent passage 19 does not affect the function of this on-off valve device.

Note that the present invention is not limited to the above embodiment.

For example, the passage for introducing pressure into the pressure chamber and the passage for releasing pressure are not necessarily limited to those described above, and may be of any type.

Further, the valve body is not necessarily seated from the outflow chamber side, but may be seated from the inflow chamber side.

Further, the air vent passage is not necessarily required, but may not be formed on the valve shaft.

Furthermore, it goes without saying that the present invention is applicable to on-off valve devices not only for water supply but also for other uses.

As described above, the present invention forms an air vent passage that communicates the upper part of the buffer chamber with the pressure chamber, and this air vent passage is provided with a check valve that only allows flow from the buffer chamber toward the pressure chamber. .

Therefore, the air that has flowed into the buffer chamber 15 is released into the pressure chamber from this air vent passage, so that air does not accumulate in the buffer chamber and impede its operation.

In addition, a check valve was installed in this air vent passage, so when pressure is introduced into the pressure chamber, this pressure will not escape to the buffer chamber through the air vent passage. This has great effects, such as not affecting the operation of the on-off valve device.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of one embodiment of the present invention. 1...Valve box, 2...Inflow chamber, 3...Outflow chamber, 5.
... Valve port, 6... Valve body, 11... Valve stem, 12...
Pressure receiving body, 14...pressure chamber, 19...air vent passage, 2
0...Steel ball (check valve) 21...Relief pressure passage, 23.
... Control on-off valve, 24... Orifice, 26...
branch passage.

Claims (1)

[Claims] 1. An inflow chamber and an outflow chamber formed in a valve box and communicating with each other via a valve port, a valve body that opens and closes the valve port, and a pressure receiving body that is attached to the valve shaft of this valve body and moves together with this valve body. The cliff force chamber is formed on one side of the pressure receiving body and communicates with the inflow chamber through an orifice to release the introduced pressure, and the cliff force chamber is formed on the other side of the pressure receiving body and increases the actual pressure. A buffer chamber that controls the moving speed of the Uemachi receiving body by causing internal fluid to flow out through an orifice when the body moves, and air that communicates the buffer chamber, the upper part of this buffer chamber, and the pressure chamber. An on-off valve device comprising: a vent passage; and a check valve provided in the air vent passage and allowing flow only from the buffer chamber to the pressure chamber.