JP2003159347A - Open valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust an opening speed and a closing speed of an open valve separately not to cause a water-hammer action. <P>SOLUTION: The open valve 1C of a type which opens a valve body 9 by pressuring a cylinder room 12 has piping 14 connected to the cylinder room and a flow control device 30 in the piping to adjust flow volume of water flowing in the piping. The flow control device adjusts to differentiate flow volume in the direction where water flows in the cylinder room from flow volume in the direction where water flows out of the cylinder room. The flow volume in the direction to flow in the cylinder room is adjusted to be less than that in the direction to flow out of the cylinder room, and not the closing speed of the valve body but the opening speed of the valve body is reduced. The flow control device comprises a valve member 31 with a structure of a check valve and an orifice member 33 to control a flow volume. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open valve, and more particularly to an open valve used in fire extinguishing equipment.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. 2001-124234
An automatic valve is disclosed as an open valve used in fire fighting equipment. A conventional open valve will be described with reference to FIG.

The open valve 1 has a main body 2 formed by a partition wall 7.
The inside is divided into a primary side 3 and a secondary side 4 and is divided. A primary side pipe 5 from a pressurized water supply device (not shown) is connected to the primary side 3, and a secondary side pipe 6 connected to an open type water sprinkling head (not shown) is connected to the secondary side 4.

The primary side 3 of the main body 2 is filled with pressurized water, and the secondary side 4 is open to the atmosphere. The partition wall 7 that divides the primary side 3 and the secondary side 4 is provided with an opening that connects them, and a valve seat 8 is formed around the opening. The valve seat 8 is provided with a valve body 9 that closes the opening, and the valve body 9 slides in the left-right direction as shown in FIG. 4 to be in an open state or a closed state.

The valve body 9 is connected to one end of the rod 10, and the piston 11 is connected to the other end of the rod 10, so that the valve body 9 interlocks with the piston 11.
The piston 11 is provided in the cylinder chamber 12. In the cylinder chamber 12, a pressure chamber 13 is formed on the valve body 9 side of the piston 11.

A connection pipe 14 is connected to the pressurizing chamber 13, and the connection pipe 14 is connected to the primary side 3 of the main body 2 via a pressurizing pipe 15. The pressurizing pipe 15 is provided with a start valve 16 that is opened or closed remotely or manually. Further, the connection pipe 14 is provided with a needle valve 19p for variably adjusting the flow rate of water flowing in the connection pipe 14. A drainage pipe 17 is provided branching from the path of the pressurizing pipe 15 and the connecting pipe 14, and an orifice 18 for reducing the flow rate is provided.

In the opening valve 1 as described above, the opening / closing operation of the valve body 9 is performed by opening / closing the starting valve 16 and pressurizing the pressurizing chamber 13. The movement of the open valve 1 will be briefly described. The starting valve 16 is normally closed, the pressurizing chamber 13 is not pressurized, and the valve body 9 is seated on the valve seat 8.

When the start valve 16 is opened manually or remotely, the pressure water on the primary side 3 is pressurized by the pressurizing pipe 15 and the connecting pipe 1.
4 is introduced into the pressure chamber 13 inside the cylinder 12 through 4,
The pressure water pushes up the piston 11 (moves leftward in the figure), and the interlocking valve element 9 performs an opening operation.
As a result, the pressure water introduced to the primary side 3 of the main body 2 flows into the secondary side 4 by opening the valve body 9, and the pressure water is supplied to the secondary side pipe 6.

Then, when the start valve 16 is changed from the open state to the closed state, the supply of the pressurized water to the pressurizing chamber 13 is cut off. Therefore, pressure is discharged from the pressurizing chamber 13 through the connection pipe 14 and the drainage pipe 17, whereby the piston 11 is lowered (moved to the right in the figure), and the interlocking valve body 9 performs a closing operation. In this way, the valve body 9 is seated on the valve seat 8 so that the primary side 3 and the secondary side 4 are blocked, and the pressure water is sealed in the primary side 3.

In the operation of the opening valve 1, the connecting pipe 1
If the needle valve 19p is not provided in 4, the amount of water flowing into the pressurizing chamber 13 is not limited and a water hammer phenomenon occurs. Therefore, the operation when the needle valve 19p is not provided will be briefly described.

When the start-up valve 16 is opened and the fire extinguishing water is supplied to the pressurizing chamber 13, the valve body 9 suddenly separates from the valve seat 8 and is fully opened at once. Therefore, the high-pressure fire extinguishing water in the primary side pipe 5 is pumped at high speed into the unfilled secondary side pipe 6. When the flow of this fire extinguishing water is suddenly narrowed at the nozzle port of the sprinkling head through the pipe, the flow velocity is suddenly reduced, and a very large impact is applied to the nozzle and piping equipment. As described above, when the valve body 9 is rapidly opened and closed without providing the needle valve 19p, the pressurized water on the primary side 3 flows or stops at once, which causes a water hammer effect in the piping system. I will end up.

Therefore, in the conventional open valve 1, the introduction or discharge of the pressurized water to the pressurizing chamber 13 is restricted by the needle valve 19p. At this time, it is not only necessary to reduce the flow rate. In other words, the release valve 1 is used for a water spray system for extinguishing a fire, but at that time, even if the release valve 1 is opened, it takes time for the fire extinguishing water (pressure water) to be discharged. The function of the system cannot be exhibited. Therefore, in the system where the release valve 1 is used, the flow rate is adjusted by the needle valve 19p so that the water hammer action is not caused as much as possible within the range where the function can be exerted.

[0013]

The needle valve 19p for adjusting the flow rate limits the flow rate of the connecting pipe 14 connected to the pressurizing chamber 13. Therefore, the pressure water is introduced into the pressurizing chamber 13 and the pressure water is discharged from the pressure chamber 13 in the same manner. That is, if the opening speed of the valve element is reduced, the closing speed is also reduced at the same time. This is not desirable because the time until pressure regulation and the closing time become long. Therefore, it is an object of the present invention to obtain an opening valve in which the adjustment of the opening operation and the closing operation of the opening valve can be individually and optimally set.

[0014]

According to the present invention, a main body is divided into a primary side and a secondary side, an opening communicating with them is sealed with a valve body, and the valve body is connected to a piston in a cylinder chamber.
In a release valve that opens and closes the valve body by pressurizing or depressurizing the cylinder chamber, a pipe is connected to the cylinder chamber, and a flow rate adjusting device that adjusts the flow rate of water flowing in the pipe is provided in the pipe. The flow rate adjusting device is characterized in that the flow rate in the direction of flow into the cylinder chamber and the flow rate in the direction of flow out of the cylinder chamber are adjusted to be different.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 shows a schematic configuration of an open valve according to the present invention. In FIG. 1, the same parts as those of the conventional technique (FIG. 4) are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 1, the open valve 1C is a cylinder chamber 1
It is a pressure release type valve that is opened by pressurizing the second pressure chamber 13. That is, as in the prior art, the open valve 1C opens the valve body 9 when the pressurized water flows into the pressurizing chamber 13 of the cylinder chamber 12 to pressurize the pressurizing chamber 13.

The difference between this embodiment and the prior art is that the flow rate adjusting device 30 is used instead of the needle valve 19p and the pressurizing chamber 13 is used.
It is a point provided on the connection pipe 14 connected to the. Therefore,
A flow rate adjusting device 30 that adjusts the flow rate of water flowing through the connection pipe 14 will be described with reference to FIG.

FIG. 2 is a schematic sectional view showing an example of the flow rate adjusting device 30 of this embodiment. Note that in FIG. 2, FIG. 2 (A) shows that when the cylinder chamber 12 is opened, that is, from the primary side 3
It shows the case where water flows to the side. FIG. 2B shows a closed state, that is, a case where water flows from the cylinder chamber 12 to the drain pipe 17 side.

The flow rate adjusting device 30 comprises a valve member 31 having a check valve structure which is opened only in one direction, and an orifice member 33 which regulates the flow rate.

A valve seat 35 having an opening 34 with a diameter A is provided in the flow control device 30. This valve seat 35
The opening 34 is normally closed by the valve member 31. One end of the valve member 31 is axially fixed, and when the water flows out from the cylinder chamber 12 side, the valve member 31 is rotated and opened.

An orifice member 33 is formed in the center of the valve member 31 so as to face and communicate with the opening 34. The orifice diameter B of the orifice member 33 is smaller than the diameter A of the opening 34.

With such a configuration, the flow rate adjusting device 30
Is adjusted so that the flow rate in the direction of flow into the cylinder chamber 12 and the flow rate in the direction of flow out of the cylinder chamber 12 are different. In particular, the flow rate in the direction of flowing into the cylinder chamber 12 is adjusted to be smaller than the flow rate in the direction of flowing out of the cylinder chamber 12.

Next, the operation of the flow rate adjusting device 30 will be described. Fire occurred and start valve 1 remotely or manually
When 6 is opened, the water on the primary side 3 is supplied to the flow rate adjusting device 30. At this time, the valve member 31 is not opened due to the check valve structure (see FIG. 2A). Therefore, the supplied water is restricted by the orifice member 33 and flows into the pressurizing chamber 13 of the cylinder chamber 12 through the opening 34. Therefore, the flow rate to the pressurizing chamber 13 is very small and the occurrence of water hammer when the valve body 9 is opened can be suppressed.

Then, the fire extinguishing is completed and the start valve 16
A case in which is closed will be described. In this case, the water in the pressurizing chamber 13 is supplied to the flow rate adjusting device 30 and drained from the drainage pipe 17. At this time, the valve member 31 rotates about the axis and opens (see FIG. 2 (B)). Therefore, the water from the pressurizing chamber 13 flows in a larger amount than when it is opened, based on the size of the opening 34. Therefore,
It is possible to suppress the flow rate to some extent and prevent the occurrence of water hammer while preventing the valve body 9 from being closed for a long time.

As described above, since the flow rate adjusting device 30 adjusts the flow rate in the direction into the cylinder 12 chamber and the flow rate in the direction from the cylinder chamber 12 so as to be different from each other,
It becomes possible to individually adjust the opening speed (time) and the closing speed (time) of the release valve so as not to cause a water hammer effect.

Further, in the pressure release type open valve 1C, the flow rate in the direction of flowing into the cylinder chamber 12 is
Since the flow rate is adjusted to be smaller than the flow rate in the direction flowing out from, it is possible to reduce only the opening speed without reducing the closing speed of the valve body 9.

Next, another embodiment of the flow rate adjusting device will be described with reference to FIG. FIG. 3 shows the flow rate adjusting device 4 of the present embodiment.
It is a schematic sectional drawing which showed an example of 0. Note that, in FIG. 3, FIG. 3 (A) shows a case where water is flowing, that is, a case where water flows from the primary side 3 to the cylinder chamber 12 side. See also FIG.
(B) is closed, that is, from the cylinder chamber 12 to the drain pipe 1
The case where water flows to the 7 side is shown.

The flow rate adjusting device 40 is provided with a valve member 41 having a check valve structure which is opened only in one direction and an orifice member 43 which regulates the flow rate.

In the flow rate adjusting device 40, there is provided a valve seat body 45 which is tapered and has an opening 44 having a diameter C at the center. The opening 44 of the valve seat body 45
Is closed by a ball-shaped valve member 41 having a diameter larger than C. When water flows out from the cylinder chamber 12 side, the valve member 41 is separated from the valve seat body 45 and is stopped by a wire mesh 46 provided on the opposite side of the valve seat body 45.

The orifice member 4 is provided at a part of the valve seat body 45.
3 is formed. The orifice member 43 has an orifice diameter D smaller than the diameter C of the opening 44.

With such a configuration, the flow rate adjusting device 40
Is adjusted so that the flow rate in the direction of flow into the cylinder chamber 12 and the flow rate in the direction of flow out of the cylinder chamber 12 are different. In particular, the flow rate in the direction of flowing into the cylinder chamber 12 is adjusted to be smaller than the flow rate in the direction of flowing out of the cylinder chamber 12.

That is, when the starting valve 16 is opened and the valve body 9 is opened, as shown in FIG.
Due to this, the opening 44 of the valve seat body 45 is blocked, water flows only from the orifice member 43, and the flow rate is limited to a minute amount. On the other hand, when the starter valve 16 is closed and the valve body 9 is closed, the valve member 41 is separated from the opening 44 of the valve seat body 45 by the water flow and the wire mesh 46 as shown in FIG. 3B.
Hits. Therefore, since the water flows based on the size of the opening 44, a larger amount of water flows than when the water is opened.

Also in the flow rate adjusting device 40 shown in FIG. 3, the opening speed (time) and the closing speed (time) of the open valve do not cause a water hammer effect, like the flow rate adjusting device 30 of FIG. As described above, it is possible to obtain the operational effect of being individually adjusted, and it is possible to reduce only the opening speed without reducing the closing speed of the valve body.

In this embodiment, the open valve 1 is described as a pressurizing open type valve for introducing water into the pressurizing chamber 13 to open the valve body 9, but it may be a depressurizing open type valve. You can also In this case, the piston 1 in the cylinder chamber 13
The pressurizing chamber is provided at a position opposite to the first pressurizing chamber 13. And the starting valve 16 which is always opened from the primary side 3 to the pressurizing chamber
The connecting pipe 14 is connected through the valve 11, and the valve body 9 is closed by constantly applying the pressure of the pressurized water to the piston 11. A drainage pipe 17 having an orifice 18 is connected to the pressurizing pipe 15, and a flow rate adjusting device 30 is provided in the connecting pipe 14.

In this way, when the start valve 16 is closed in the event of a fire, water in the pressurizing chamber is drained from the drainage pipe 17 and the pressurization to the piston 11 is eliminated, so that the valve body 9 is opened together with the piston 11. Become. When the start valve 16 is opened, water enters the pressurizing chamber and the valve body 9 is closed while the flow rate is adjusted by the flow rate adjusting device 30.

[0036]

The present invention is configured as described above, and the flow rate adjusting device adjusts the flow rate in the inflow direction to the cylinder chamber and the flow rate in the outflow direction from the cylinder chamber. Therefore, the opening speed (time) and the closing speed (time) of the open valve can be individually adjusted so as not to cause a water hammer effect.

Further, in the pressure release type open valve, the flow rate in the direction of flowing into the cylinder chamber is adjusted to be smaller than the flow rate in the direction of flowing out of the cylinder chamber. Therefore, it is possible to reduce only the opening speed without reducing the closing speed of the valve body.

The flow rate adjusting device comprises a valve member having a check valve structure and an orifice member for regulating the flow rate. Therefore, the structure is very simple.

[Brief description of drawings]

FIG. 1 is a schematic view showing an open valve of the present invention.

FIG. 2 is a schematic sectional view of a flow rate adjusting device.

FIG. 3 is a schematic cross-sectional view of another flow rate adjusting device.

FIG. 4 is a schematic view showing a conventional open valve.

[Explanation of symbols]

1 Open Valve, 1C Open Valve, 2 Main Body, 3 Primary Side, 4 Secondary Side, 5 Primary Side Piping, 6 Secondary Side Piping, 7 Partition, 8 Valve Seat, 9 Valve Body, 10 Rod, 11 Piston, 12 Cylinder Chamber, 13 pressurizing chamber, 14 connection pipe, 17 drainage pipe, 18
Orifice, 19p needle valve (flow control valve), 3
0 flow rate adjusting device, 31 valve member, 33 orifice member, 34 opening, 35 valve seat, 40, flow rate adjusting device, 41 valve member, 43 orifice member, 4
4 openings, 45 valve seats, 46 wire mesh,

Claims (3)

[Claims] 1. A main body is divided into a primary side and a secondary side, an opening communicating with them is sealed with a valve body, the valve body is connected to a piston in a cylinder chamber, and the cylinder chamber is pressurized or depressurized. In the open valve for opening and closing the valve body, a pipe is connected to the cylinder chamber, and a flow rate adjusting device for adjusting the flow rate of water flowing in the pipe is provided in the pipe, and the flow rate adjusting device is the cylinder chamber. An open valve, characterized in that the flow rate in the inflow direction is adjusted to be different from the flow rate in the outflow direction from the cylinder chamber. 2. The opening valve is a pressurization opening type opening valve that opens the valve body when water flows into the cylinder chamber, and the flow rate in the direction of flowing into the cylinder chamber is from the cylinder chamber. The opening valve according to claim 1, wherein the opening valve is adjusted to be smaller than the flow rate in the outflow direction. 3. The release valve according to claim 1, wherein the flow rate adjusting device includes a valve member having a check valve structure and an orifice member that regulates a flow rate.