JP3809320B2 - Release valve - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an open valve.
[0002]
[Prior art]
A conventional open valve is shown in FIG. The open valve is divided into a primary side 3 and a secondary side 4 inside the main body 2, and a primary side pipe 5 from a pressurized water supply device (not shown) is connected to the primary side 3, and a secondary side 4 is connected to the secondary side 4. A secondary pipe 6 connected to a watering head (not shown) is connected, the primary side 3 of the main body 2 is filled with pressurized pressure water, and the secondary side 4 is open to the atmosphere. A valve seat 8 for providing an opening is formed in the partition wall 7 that divides the body 2 into a primary side 3 and a secondary side 4. A valve body 9 that always seals the valve seat 8 is provided, and the valve body slides in the left-right direction with the appearance of FIG.
[0003]
The valve body 9 is coupled to one end of the rod 10, and the piston 11 is coupled to the other end of the rod 10, whereby the valve body 9 is interlocked with the piston 11. The piston 11 is provided in the cylinder 12, and a pressurizing chamber 13 is configured on the valve body 9 side of the piston 11. A pressurizing pipe 15 is connected to the pressurizing chamber 13 from the primary side 3 of the main body 2 via a connecting pipe 14. The pressurizing pipe 15 is provided with an activation valve 16 and is opened and closed as a flow path regardless of whether it is remote or manual. Further, the connection pipe 14 is provided with a needle valve 19p for variably adjusting the flow rate, and further, a drain pipe 17 is provided branching off from the path between the pressurization pipe 15 and the connection pipe 14 to reduce the flow rate. Is discharged to the drainage passage through the orifice 18.
[0004]
In such an open / close valve, the pressurizing and exhausting pressure of the pressurizing chamber 13 is performed based on the opening / closing of the start valve 16, and the opening / closing operation of the valve body 9 is performed. Briefly describing this movement, the starting valve 16 is normally closed, the pressurizing chamber 13 is in a non-pressurized state, 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 introduced into the pressurizing chamber 13 in the cylinder 12 through the pressurizing pipe 15 and the connecting pipe 14, and the piston 11 is pushed up by the pressure water and interlocked. The valve body 9 to perform the opening operation. As a result, the pressure water introduced up to the primary side 3 of the main body 2 flows into the secondary side 4 by opening the valve body 9 and is supplied to the secondary side pipe 6.
[0005]
When the start valve 16 is closed from the open state, the pressure water supply to the pressurizing chamber 13 is shut off, and the pressure is discharged from the pressurizing chamber 13 through the connection pipe 14 and the drain pipe 17, whereby the piston 11 is The valve body 9 that moves down is closed. Then, when the valve body 9 is seated on the valve seat 8, the primary side 3 and the secondary side 4 are blocked, and the pressure water is sealed by the primary side 3.
[0006]
In this operation, when the valve body 9 is rapidly opened and closed, the movement of the pressurized water on the primary side 3 flows or stops at a stretch, which causes a water hammer effect on the piping system. Therefore, in this conventional on-off valve, the introduction or discharge of the pressure 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, that is, the release valve is used for a watering system for extinguishing the fire, but at that time, even if the release valve is opened, the fire-extinguishing water (pressure water) remains. If it takes time to be released, the function of the system cannot be performed. Therefore, in the system in which the release valve is used, the flow rate is adjusted by the needle valve 19p so as not to cause the water hammer effect as much as possible within a range where the function can be exhibited.
[0007]
[Problems to be solved by the invention]
In the open valve as described above, the needle valve 19p for adjusting the flow rate restricts the flow rate of the connecting pipe 14 connected to the pressurizing chamber 13, so when introducing pressure water into the pressurizing chamber 13, and Both are the same when discharging. At this time, since the occurrence of the water hammer effect differs depending on whether the release valve is opened or closed, it may be adjusted to one that is likely to occur. As a result, for example, when the time is adjusted during the opening operation, extra time is required for the closing operation.
[0008]
An object of the present invention is to obtain an open valve in which adjustment of the open operation and the close operation of the open valve can be set individually and optimally.
[0009]
[Means for Solving the Problems]
The present invention is provided with a valve body that divides the inside of a main body into a primary side and a secondary side and seals an opening that communicates them, and the valve body is coupled to a piston in a cylinder and pressurizes the piston In the open valve that opens or closes the valve body by introducing pressure water into the chamber, the connecting pipe connected to the pressurizing chamber is branched into two systems in the middle part, and the flow rate of each branched pipe is A flow rate adjusting valve that is variably adjusted and restricted is provided, a first check valve capable of flowing into the pressurizing chamber side on one side, and a second check valve capable of flowing from the pressurizing chamber side on the other side. The flow rate is adjusted by each of the flow rate adjusting valves separately during the opening operation and the closing operation of the opening valve.
[0010]
At this time, the connection pipe is connected to the pressure pipe for introducing the pressure water and the drain pipe for discharging the pressure water, and further provided with a start valve in the pressure pipe or the drain pipe. The opening degree of the valve body can be adjusted according to the degree of pressure water introduction.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described. FIG. 1 shows a schematic configuration of an open valve utilizing the present invention. The release valve 1 is divided into a primary side 3 and a secondary side 4 inside the main body 2, and a primary side pipe 5 from a pressurized water supply device (not shown) is connected to the primary side 3, and a secondary side is A secondary pipe 6 connected to a watering head (not shown) is connected, the primary side 3 of the main body 2 is filled with pressurized pressure water, and the secondary side 4 is open to the atmosphere. . A valve seat 8 for providing an opening is formed in the partition wall 7 that divides the body 2 into a primary side 3 and a secondary side 4. A valve body 9 that always seals the valve seat 8 is provided, and the valve body 9 slides in the left-right direction with the appearance of FIG. The valve body 9 is provided with a skirt 9a not shown in detail for gradually increasing the degree of opening during the opening operation, and the opening or closing position of the valve body 9 can be recognized in appearance. An indicator bar 9b protruding from the main body 2 is provided.
[0012]
The valve body 9 is coupled to one end of the rod 10, and the piston 11 in the cylinder 12 is coupled to the other end of the rod 10, whereby the valve body 9 is interlocked with the piston 11. With respect to the piston 11, a pressurizing chamber 13 is formed in the cylinder 12 on the valve body 9 side of the piston 11. The release valve 1 is configured as a so-called pressurization release type in which the piston 11 is pushed up and the valve body 9 is opened by pressurizing the pressurizing chamber 13. A pressurizing pipe 15 is connected to the pressurizing chamber 13 from the primary side 3 of the main body 2 via a connecting pipe 14. The pressurizing pipe 15 is provided with an activation valve 16 to open and close the pressurizing pipe 15 as a flow path regardless of whether it is remote or manual. Further, a drainage pipe 17 is provided by branching from the path between the pressurization pipe 15 and the connection pipe 14, and the drainage path is provided via the orifice 18 for reducing the flow rate in order to maintain the pressure in the pressurization pipe 15 and the connection pipe 14. Is discharged.
[0013]
Further, the connecting pipe 14 is branched into two systems at the intermediate portion thereof, and one branch pipe 14A includes a needle valve 19A (flow rate adjusting valve) for variably adjusting the flow rate and a pressurizing chamber 13. A check valve 20A (first check valve) capable of flowing water is provided on the side, and the other branch pipe 14B has a needle valve 19B (flow rate adjustment valve) for variably adjusting the flow rate. And a check valve 20B (second check valve) capable of flowing water from the pressurizing chamber 13 side.
[0014]
The movement of the on-off valve 1 will be described. Normally, the start valve 16 is closed, the pressurizing chamber 13 is not pressurized, and the valve body 9 is seated on the valve seat 8. At this time, the water pressure of the pressure water on the primary side 3 is applied to the valve body 9 in the closing direction, but the pressure water is applied to the primary side 3 by being slightly biased in the closing direction by a spring (not shown). Even if it is not introduced, it will remain closed.
[0015]
When the start valve 16 is opened manually or remotely, the pressure water on the primary side 3 is introduced into the pressurizing chamber 13 in the cylinder 12 through the pressurizing pipe 15 and the connecting pipe 14, and the piston 11 is pushed up by the pressure water. The valve body 9 that is interlocked via the rod 10 performs an opening operation (toward the left side in appearance in FIG. 1). As a result, the pressure water introduced up to the primary side 3 flows into the secondary side 4 through the opening of the valve seat 8 due to the opening of the valve body 9, and the pressure water is supplied to the secondary side pipe 6 as shown in detail. There is no watering head for water discharge etc. for fire extinguishing.
[0016]
After the purpose of water discharge such as fire extinguishing is achieved, when the start valve 16 is closed from the open state, the supply of pressure water from the primary side 3 to the pressurizing chamber 13 is stopped, and the connection piping from the pressurizing chamber 13 is stopped. 14 and the drainage pipe 17, the piston 11 is lowered in the cylinder 12 (toward the right-hand side of the appearance in FIG. 1), and the valve body 9 that is linked via the rod 9 is closed opposite to the opening operation. I do. At this time, the valve body 9 receives the pressure of the pressure water in the primary side 3 and 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 to the primary side 3.
[0017]
At this time, as shown in the above problem, when the valve body 9 is rapidly opened and closed, the movement of the pressure water on the primary side 3 flows at once or stops, so that the water hammer effect is exerted on the piping system. It will occur. For this reason, in this embodiment, the needle valve 19A, 19B gradually introduces and discharges the pressure water from the pressurizing chamber to prevent a rapid movement of the valve body 9. The connecting pipe 14 flows to the inflow side and the discharge side with respect to the pressurizing chamber 13. Needle valves 19A and 19B are respectively arranged in branched pipes 14A and 14B of the connecting pipe 14, and each of the pipes 14A and 14B has a check valve 20A capable of flowing toward the pressurizing chamber 13, and the pressurizing chamber 13 Check valves 20B capable of flowing in the opposite direction are provided, and the piping 14A flows when pressurized, and the piping 14B flows when draining. The needle valve 19 </ b> A restricts the flow rate when the pressurizing chamber 13 is pressurized, and the needle valve 19 </ b> B restricts the flow rate when draining from the pressurizing chamber 13. That is, the movement of the valve body 9 during the opening operation of the opening valve 1 is adjusted by the needle valve 19A, and the movement of the valve body 9 during the closing operation of the opening valve 1 is adjusted by the needle valve 19B. Therefore, when the release valve 1 is used in a watering system for fire extinguishing, etc., as long as the function of the system can be exerted, the opening operation of the release valve 1 and the closing operation are individually performed as much as possible. The flow rate is adjusted by the needle valves 19A and 19B so as not to occur.
[0018]
Such an open valve 1 performs an operation of being fully opened or fully closed based on opening and closing of the start valve 16, and detects the amount of pressure water flowing into the pressurizing chamber 13 by detecting the pressure on the secondary side 4. Thus, by providing a pressure regulating pilot valve to be adjusted, the degree of opening of the valve body 9 can be adjusted, and the pressure water can be used as a pressure regulating valve that regulates the pressure water on the primary side 3 and flows out to the secondary side 4. Further, when it is difficult to provide a direct drainage path, the drainage pipe 17 may be connected to the main body 2 secondary side 4.
[0019]
Furthermore, although the open valve 1 of this embodiment has been described as a pressure open type valve that introduces pressure water into the pressurization chamber 13 to open the valve body 9, it can also be a decompression open type valve. In that case, without connecting the connecting pipe 14 to the pressurizing chamber 13 of the piston 11 in the cylinder 12, pressurization is performed from the primary side 3 through the start valve 16 on the opposite side to the pressurizing chamber 13 of the piston 11 in the cylinder 12. The pipe 15 is connected through an orifice, and an activation valve is disposed in the drain pipe 17. As a result, if the starting valve is closed, the pressure from the primary side 3 is always applied to the piston 11 in the closing direction of the valve body 9. Then, when the start valve is opened, the valve body 9 is opened together with the piston 11 because the pressurization of the piston 11 is lost. For this reason, the valve body 9 is pushed up to the valve body 9 by the pressure receiving surface of the spring or the pressure water.
[0020]
Furthermore, for each configuration as in the above embodiment, it is possible to change the material, shape, etc. if it functions, and select the direction of running water within one housing and individually in each direction. An adjusting means for adjusting the flow rate may be provided.
[0021]
As described above, the present invention is provided with a valve body that divides the inside of the main body into a primary side and a secondary side and seals an opening that communicates them, and the valve body is coupled to a piston in the cylinder to add the piston. In the open valve that opens or closes the valve body by introducing pressurized water into the pressurizing chamber, the connecting piping connected to the pressurizing chamber is branched into two systems, each with a flow control valve, Since the first check valve capable of flowing water is provided on the pressurizing chamber side and the second check valve capable of flowing water from the pressurizing chamber side is provided on the other side, the opening valve can be The flow rate is individually adjusted by the respective needle valves so as not to cause a water hammer effect during the opening operation and the closing operation.
[0022]
If the connection pipe is connected to a pressure pipe for introducing pressure water and a drain pipe for discharging pressure water, and a start valve is provided in the pressure pipe or drain pipe, the opening valve can be operated by operating the start valve. The opening and closing of the valve body can be adjusted according to the degree of introduction of the pressure water into the pressurizing chamber, and the movement of the valve body during the opening adjustment is also adjusted with an individual needle valve. It becomes.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating an embodiment utilizing the present invention.
FIG. 2 is a schematic diagram showing a conventional embodiment.
[Explanation of symbols]
3 Primary side 4 Secondary side 9 Valve body 11 Piston 13 Pressurizing chamber 14 Connection piping 19A, 19B Needle valve (flow rate adjusting valve)
20A, 20B Check valve

Claims (4)

There is provided a valve body that divides the main body into a primary side and a secondary side and seals an opening that communicates them, and the valve body is coupled to a piston in the cylinder, and pressurized water is applied to a pressurizing chamber that pressurizes the piston. In the open valve that opens or closes the valve body by introducing
The connecting piping connected to the pressurizing chamber is branched into two systems in the middle portion thereof , and a flow rate adjusting valve is provided for variably adjusting and restricting the flow rate of each branched piping , and on the one side of the pressurizing chamber A first check valve capable of flowing water and a second check valve capable of flowing water from the pressurizing chamber side on the other side , wherein the opening valve is opened and closed. Individually, the flow rate is adjusted by each of the flow rate adjusting valves.   2. The release valve according to claim 1, wherein the connection pipe is connected to a pressure pipe for introducing pressure water and a drain pipe for discharging pressure water.   The open valve according to claim 1 or 2, wherein an activation valve is provided in the pressure pipe or the drain pipe.   The open valve according to any one of claims 1 to 3, wherein the opening degree of the valve body is adjusted according to the degree of introduction of pressure water into the pressurizing chamber.

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