JP5091175B2 - Release valve - Google Patents

Description

  The present invention relates to an opening valve, and more particularly to a simultaneous opening valve provided in a pre-filled water-type sprinkler fire extinguishing facility.

  Conventionally, in the sprinkler fire extinguishing equipment, when the secondary pipe where the sprinkler head is installed is filled with water, the sprinkler head opens and the fire detector senses, the base side of the secondary pipe There is a pre-charged facility that is configured to open the simultaneous opening valve provided in the main opening valve so that fire-extinguishing water flows from the primary side piping to the secondary side piping.

  A simultaneous opening valve provided in this type of fire extinguishing equipment has a piston chamber for controlling the valve body so that the valve body is closed when the piston chamber is pressurized and the valve body is opened when the pressure is reduced. For example, as in the simultaneous open valve described in Japanese Patent Application Laid-Open No. 2003-210605 (Patent Document 1), a piston is provided with a communication passage for supplying primary water to the piston chamber for pressurization of the piston chamber. It is provided between the chamber and the primary side, and a check valve is provided in the communication path in order to prevent the backflow of the communication path.

  In this type of fire extinguishing equipment, the simultaneous opening valve further includes a water flow detection means and may be used as a water flow detection device for each protection section. In that case, as in the above-mentioned Patent Document 1. Sometimes called a running water detector.

JP 2003-210605 A

  In the case of a simultaneous opening valve installed in a pre-filled fire extinguishing system, the pressure on the primary and secondary sides of the valve body and the pressure in the piston chamber are almost balanced under normal monitoring conditions, and the valve body is energized in the closing direction. The closed state of the valve body is maintained by the closing force of the biasing member such as a spring. However, the piston chamber is abnormally depressurized due to, for example, leakage, or the secondary side is abnormally increased in pressure, causing the balance of pressure acting on the valve body to be lost and the closing force acting on the valve body to be less than the opening force. Then, there is a possibility that the valve body may be accidentally opened, thereby causing a running water signal to be output and a non-fire report may be issued.

  In view of the circumstances described above, an object of the present invention is to prevent an erroneous opening of a valve body in an opening valve.

The present invention is an open valve that includes a primary chamber, a secondary chamber, and a piston chamber, the primary chamber and the secondary chamber are separated by a valve body, and the valve body opens and closes based on the pressure of the piston chamber. A first communication passage provided with a check valve that allows the primary chamber and the piston chamber to communicate with each other at all times when the valve body is in a closed state, and allows only water to flow from the primary chamber to the piston chamber; And a second communication path provided with a check valve that allows the secondary chamber and the piston chamber to communicate with each other only when the valve body is in a closed state, and allows only water to flow from the secondary chamber to the piston chamber. The release valve is characterized by comprising:

  Moreover, this invention is the said open valve, Comprising: The said 1st communicating path and / or the said 2nd communicating path are provided in the said valve body, It is an open valve characterized by the above-mentioned. Here, instead of forming the first communication path and / or the second communication path in the valve body, a detour passing through the outside of the valve body can be used.

  Moreover, this invention is the said open valve, Comprising: It is an open valve characterized by being provided in a filling pre-operation type sprinkler fire extinguishing equipment.

  In addition, the said opening valve of this invention shall be further equipped with the flowing water detection means which detects the flowing water from the said primary side to the said secondary side.

  According to the opening valve of the present invention, even when the piston chamber is abnormally depressurized when the valve body is closed and the pressure in the piston chamber decreases relative to the pressure in both the primary chamber and the secondary chamber, A communication passage and a second communication passage are provided, and the piston chamber is configured to be supplied with water from both the primary chamber and the secondary chamber, so that the piston chamber follows the decompression of the piston chamber, Pressure is compensated from both the secondary chambers, the pressure in the piston chamber is adjusted to be approximately the same as the pressure in both the primary and secondary chambers, and the pressure balance in the piston chamber, primary chamber and secondary chamber is maintained. Is done. For this reason, it can prevent that the closing force of a valve body becomes lower than the opening force of a valve body, and it can prevent that a valve body opens accidentally. Similarly, when the valve body is closed, the secondary side is abnormally pressurized, the secondary chamber is also pressurized, and even if the opening force of the valve body is increased by the pressure in the secondary chamber, the second communication passage is provided, and the piston chamber Since the secondary chamber is supplied with water from the secondary chamber, the piston chamber is also pressurized following the pressure increase in the secondary chamber, and the closing force of the valve body due to the pressure in the piston chamber is also increased. The force can be prevented from becoming lower than the opening force of the valve body, and the valve body can be prevented from being erroneously opened. In addition, since a misopening can be prevented, a delay device or the like is not necessary.

  That is, according to the opening valve of the present invention, it is possible to prevent the valve body from being erroneously opened even when the piston chamber is abnormally depressurized or when the secondary side is abnormally pressurized when the valve body is closed.

It is the figure which showed an example of the flowing water detection apparatus which is a simultaneous open valve of this invention, Comprising: It is an apparatus system diagram including the outline | summary of the internal structure of a flowing water detection apparatus, and the state which the valve body has closed Is shown. It is the figure which showed an example of the filling water pre-actuation type sprinkler fire extinguishing equipment provided with the same running water detection device, and is the equipment system diagram showing the configuration after the running water detection device. It is shown. It is an equipment system diagram as above and shows the state at the time of fire.

  An embodiment of a simultaneous opening valve as an example of the opening valve of the present invention will be described with reference to FIGS. 1 to 3 by taking as an example a case where the simultaneous opening valve is used as a flowing water detection device provided with flowing water detection means.

  1 is a water flow detection device that is an example of a simultaneous opening valve of the present invention, and is provided on the base end side of a secondary side pipe P2 in which a sprinkler head SP is provided in a pre-filled sprinkler fire extinguishing facility S. is there. In addition, the primary side piping P1 (illustration is abbreviate | omitted in FIG.2 and FIG.3) connected to a water supply main pipe | tube etc. (illustration omitted) is connected to the primary side of the flowing water detection apparatus 1. FIG.

  The flowing water detection device 1 is partitioned into a primary chamber 3 connected to the primary side pipe P1 and a secondary chamber 4 connected to the secondary side pipe P2 in the main body 2, and the primary chamber 3 and the secondary chamber 4. A normally closed valve mechanism 7 is provided for opening and closing the water inlets 6 of the two chambers formed in the partition wall 5.

  The valve mechanism portion 7 includes a bottomed cylindrical valve body 8, a cylinder portion 9 that slidably accommodates the valve body 8, and a piston chamber 10 defined inside the valve body 8 in the cylinder portion 9. The rod 12 is erected from the inner surface of the bottom wall 11 of the valve body 8 toward the piston chamber 10, and is provided inside the valve body 8 so as to be wound around the rod 12. The outer surface 11a of the bottom wall 11 of the valve body 8 is opposed to the secondary chamber 4 through the water passage 6 and the outer surface 14a of the peripheral wall 14 of the valve body 8 is opposed to the primary chamber 3. The seat is provided in the main body 2 and arranged on the outer surface 11a of the bottom wall 11 by the valve body 8 reciprocatingly moving in the cylinder portion 9 based on a change in pressure in the piston chamber 10. So that the valve seat portion provided at the periphery of the water inlet 6 can be opened and closed and the water inlet 6 can be opened and closed. You have me.

  The flowing water detection device 1 is provided with detection means for detecting the flow of water from the primary chamber 3 to the secondary chamber 4, specifically, the rod 12 from the cylinder portion 9 outside the main body 2. A limit switch 25 for detecting running water provided on the movement locus of the exposed end 12a is provided. The limit switch 25 moves the exposed end 12a when the valve body 8 of the valve mechanism 7 is opened, the water passage 6 is opened, and water flows from the primary chamber 3 to the secondary chamber 4. Is detected and output as a running water signal.

  The flowing water detector 1 is provided in the pre-filled sprinkler fire extinguishing equipment S, and the primary chamber 3, the secondary chamber 4 and the piston chamber 10 are filled with water at all times (at the time of monitoring). The pressure in the secondary chamber 4 and the pressure in the secondary chamber 4 act as an opening force on the valve body 8, and the pressure in the piston chamber 10 acts on the valve body 8 as a closing force. If there is no abnormality in the pressure system of these three chambers to be filled with water, the three chambers are balanced at substantially the same pressure at all times, and the valve body 8 is externally attached to the bottom wall 11 by the urging force of the spring 13 to the valve body 8. The seat 11a is maintained in a state where it is pressed against the valve seat at the periphery of the water inlet 6 so that the water flow detecting device 1 is maintained in a state in which the water inlet 6 is closed. Yes. The three chambers have substantially the same pressure due to the action of the first communication passage and the second communication passage, which will be described later, and water flows from the primary chamber 3 to the piston chamber 10 and from the secondary chamber 4 to the piston chamber 10. Because. Note that the pressure is not always the same due to the influence of the deadline and the like.

  In the flowing water detection device 1 which is a decompression open type, a decompression path 15 for decompressing the inside of the piston chamber 10 is provided connected to the piston chamber 10, and the normally activated electric start provided in the decompression path 15 is closed. When the valve 16 is activated and opened, water is discharged from the piston chamber 10 through the decompression path 15 and the inside of the piston chamber 10 is decompressed. It should be noted that the water in the piston chamber 10 can only flow to the secondary chamber 4 side simply by opening the electric start valve 16. That is, actually, the inside of the piston chamber 10 is decompressed by the operation of the sprinkler head SP and the water in the secondary chamber 4 flowing out. The inside of the piston chamber 10 is depressurized, and the closing force to the valve body 8 acting on the valve body 8 together with the urging force of the spring 13 is applied to the valve body 8 by the pressure in the primary chamber 3 and the secondary chamber 4. The opening force becomes higher, and the opening force causes the valve body 8 to move upward in the cylinder portion 9 so that the seating portion of the outer surface 11a of the bottom wall 11 is separated from the valve seat portion around the water inlet 6. Thus, the water flow detection device 1 can open the water passage 6. Reference numeral 17 denotes a normally closed manual start valve provided in the pressure reducing passage 15 in parallel with the electric start valve 16.

  And the primary side communication path as an example of the 1st communication path which has the non-return valve 19 which makes the flowing water detection apparatus 1 connect the piston chamber 10 and the primary chamber 3, and allows only the water flow from the primary chamber 3 to the piston chamber 10. 18, a secondary side communication path 20 is provided as an example of a second communication path having a check valve 21 that allows the piston chamber 10 and the secondary chamber 4 to communicate with each other and allows only water to flow from the secondary chamber to the piston chamber 10. ing. In the present embodiment, both the primary side communication path 18 and the secondary side communication path 20 are provided in the valve body 8, and specifically, the primary side communication path 18 is provided in the peripheral wall 14 of the valve body 8. The secondary side communication path 20 is provided in the bottom wall 11. The primary side communication path 18 is provided substantially in the middle of the peripheral wall 14 in the height direction, and the secondary side communication path 20 is provided in the bottom wall 11 in the vicinity of the primary side communication path 18 and the spring 13 is not in contact therewith. It is like that.

  In the flowing water detection device 1, the water in the primary chamber 3 is supplied to the piston chamber 10 through the primary side communication passage 18, and the water in the secondary chamber 4 is supplied through the secondary side communication passage 20. Thereby, when the valve body 8 is in the closed state, an abnormality such as leakage occurs in the piston chamber 10, the piston chamber 10 is depressurized, and the pressure is opposed to the pressure in the primary chamber 3 and the secondary chamber 4. Even if the pressure becomes lower, water is supplied from both the primary chamber 3 and the secondary chamber 4 to the piston chamber 10 through the primary side communication passage 18 and the secondary side communication passage 20, thereby causing abnormal decompression of the piston chamber 10. Following this, the piston chamber 10 is supplemented with pressure from both the primary chamber 3 and the secondary chamber 4, and the pressure in the piston chamber 10 becomes substantially the same as the pressure in both the primary chamber 3 and the secondary chamber 4. Will be adjusted. For this reason, the pressure balance of the piston chamber 10, the primary chamber 3, and the secondary chamber 4 is maintained, whereby the opening force to the valve body 8 by the primary chamber 3 and the secondary chamber 4 is controlled by the piston chamber 10 and the spring 13. It becomes higher than the closing force to the body 8, and it can prevent that the valve body 8 opens accidentally. Similarly, when the valve body 8 is in the closed state, the secondary side pipe P2 is abnormally boosted, the secondary chamber 4 is also abnormally boosted, and the opening force to the valve body 8 due to the pressure of the secondary chamber 4 is increased. Even if water is supplied from the secondary chamber 4 to the piston chamber 10 through the secondary side communication passage 20, the piston chamber 10 is also boosted following the abnormal pressure increase in the secondary chamber 4. The closing force on the valve body 8 due to the pressure in the chamber 10 is also increased, so that the closing force due to the pressure in the piston chamber 10 is lower than the opening force on the valve body 8 due to the pressure in the secondary chamber 4. It is designed to prevent accidental opening. The diameters of the primary side communication passage 18 and the secondary side communication passage 20 are formed as small as an orifice, and follow the slight pressure reduction of the piston chamber 10, but the pressure reduction of the piston chamber 10 occurs during a fire. When is large, the supply of water cannot follow, and as a result, the valve body 8 opens.

  That is, in the flowing water detection device 1, even if the piston chamber 10 is abnormally depressurized or the secondary chamber 4 is abnormally pressurized when the valve body 8 is in the closed state, the primary side communication path 18 and the secondary side By providing the side communication passage 20, the valve body 8 can be prevented from being erroneously opened.

  Here, in the present embodiment, the primary side communication path 18 and the secondary side communication path 20 are provided in the valve body 8, but the both communication paths include the piston chamber 10 and the primary chamber 3 as the paths. As long as the piston chamber 10 and the secondary chamber 4 communicate with each other, for example, instead of being provided in the valve body 8, although not shown, both the communication passages are connected to the piston chamber 10 and the primary chamber 3. The piston chamber 10 and the secondary chamber 4 may be bypassed to the outside of the main body 2 and communicate with each other.

  Further, the flowing water detection device 1 communicates by bypassing the primary chamber 3 and the secondary chamber 4, and the pressure in the primary chamber 3 (that is, the pressure on the primary side of the flowing water detection device 1) and the secondary chamber 4. A pressure regulating path 22 is provided for maintaining the internal pressure (that is, the pressure on the secondary side of the flowing water detection device 1) at the same pressure. Specifically, the pressure regulation path 22 is a pipeline that bypasses and communicates with the primary chamber 3 and the secondary chamber 4 through the outside of the main body 2, and a bidirectional check that can reverse the closing direction in the pipeline. A valve 23 is provided. By the operation of the bidirectional check valve 23, the pressure regulating path 22 can adjust the pressure on the primary side and the secondary side. Here, in the present embodiment, the bidirectional check valve 23 is normally in a position where the valve body 23a closes the flow from the secondary side to the primary side. When there is a slow pressure drop, the valve body 23a moves to the secondary side, opens the flow path slightly, replenishes a small amount of water from the primary side to the secondary side, and compensates for the pressure on the secondary side. When the flow rate from the primary side to the secondary side increases due to the operation of the sprinkler head SP, the valve body 23a moves to a position where the flow from the primary side to the secondary side is closed. It moves and reverses the closing direction to operate to close the flow from the primary side to the secondary side.

  The pressure regulating path 22 is connected to the primary chamber 3 and the secondary chamber 4 through a normally open water stop valve 26 and a water stop valve 27, respectively, and a primary side pressure is provided on the primary side of the bidirectional check valve 23. Is provided with a primary pressure gauge 28 for measuring the pressure, a secondary pressure gauge 29 for measuring the pressure on the secondary side is provided on the secondary side, and a pressure switch 30 for monitoring the secondary side pressure is also provided. Yes. Reference numeral 31 denotes a drainage channel connected to the secondary side, which is normally closed by a normally closed water stop valve 32 (used during a water discharge test).

  Further, a control valve 33 that is normally open (closed when the equipment is restored after the fire is extinguished) is provided in the primary chamber 3, and a limit switch 35 that detects that the control valve 33 is in an open state is provided as a control valve 33. Is provided on the movement locus of the operation lever 34.

  Further, 36 is a repeater provided in a pair with the flowing water detection device 1 and is connected to the receiver SB, and also includes a fire detector FD, an electric start valve 16, a flowing water detection limit switch 25, a secondary side pressure pressure. It is connected to terminal devices such as a pressure switch 30 for monitoring and a limit switch 35 for detecting the state of the control valve 33, and relays signal transmission and reception between them and the receiver SB.

  The flowing water detection device 1 is configured as described above, and is provided in the pre-filled pre-operated sprinkler fire extinguishing equipment S, and operates as follows.

[When monitoring]
At the time of monitoring, as shown in FIG. 2, in the flowing water detection device 1, the primary chamber 3, the secondary chamber 4, and the piston chamber 10 are all in a charged state. In the piston chamber 10, water is supplied from both the primary chamber 3 and the secondary chamber 4 through the primary side communication passage 18 and the secondary side communication passage 20, and the internal pressures of the three chambers of the primary chamber 3, the secondary chamber 4, and the piston chamber 10. Are maintained substantially the same, and the valve body 8 is maintained in the closed state of the water inlet 6 by the closing force to the valve body 8 by the urging force of the spring 13. Although the secondary side pipe P2 connected to the secondary chamber 4 is also in a water-filled state, the sprinkler head SP is not operated and the closed state is maintained.

  At the time of monitoring, for example, when there is abnormal pressure reduction in the piston chamber 10, water is supplied from the primary chamber 3 and the secondary chamber 4 to the piston chamber 10 through the primary side communication passage 18 and the secondary side communication passage 20. By following the pressure reduction of the piston chamber, the pressure is compensated from both the primary chamber 3 and the secondary chamber 4, and the internal pressure of the three chambers of the primary chamber 3, the secondary chamber 4 and the piston chamber 10 is almost equal. The same adjustment is made, that is, the equilibrium state of the internal pressure of the three chambers is continuously maintained, and the closed state of the valve body 8 is continuously maintained. Further, when the pressure in the secondary chamber 4 is abnormally increased and the opening force to the valve body 8 due to the pressure in the secondary chamber 4 increases, the piston chamber 10 enters the piston chamber 10 through the check valve 21 of the secondary communication passage 20. Due to the supply of water from the secondary chamber 4, the pressure in the piston chamber 10 is increased following the pressure increase in the secondary chamber 4, and the closing force to the valve body 8 due to the pressure in the piston chamber 10 is also increased. The closed state of 8 continues.

[In case of fire]
In the event of a fire, when the fire detector FD is activated by detecting a fire and a fire signal is output, the electric start valve 16 provided in the decompression path 15 of the piston chamber 10 opens based on the signal. . In the present embodiment, since the decompression path 15 of the piston chamber 10 is connected to the secondary side pipe P2, the electric start valve 16 opens when the sprinkler head SP is not operating. However, the water in the piston chamber 10 is not discharged, and the valve body 8 is not opened. And when a fire spreads and the sprinkler head SP is actuated by the heat and water discharge is started, the water in the piston chamber 10 flows into the secondary side pipe P2, the pressure in the piston chamber 10 is depressurized, and the primary As shown in FIG. 3, the opening force of the valve body 8 in the opening direction is moved by the opening force to the valve body 8 due to the pressure in the chamber 3, the water opening 6 is opened, and the primary chamber 3 Water enters the next chamber 4, that is, water is supplied from the primary side pipe P <b> 1 to the secondary side pipe P <b> 2, and water can be continuously discharged from the sprinkler head SP. Then, the movement of the exposed end 12a of the rod 12 accompanying the movement of the valve body 8 at this time is detected by the limit switch 25 for detecting flowing water, and this is output as a flowing water signal to the receiver SB via the repeater 36. The In the event of a fire, if the pressure in the piston chamber 10 is reduced, the water in the secondary chamber 4 has already flowed out of the sprinkler head SP, so the secondary communication path 20 does not function. However, although the amount of the primary communication path 18 is very small, water that cannot be followed is sent to the piston chamber 10. Thus, although the diameter of the primary side communication path 18 needs to be an orifice, the secondary side communication path 20 may not be an orifice.

  As described above, the flowing water detection device 1 includes the primary side communication path 18 and the secondary side communication path 20, so that the inside of the piston chamber 10 is abnormally decompressed when the valve body 8 is closed, that is, during monitoring. Moreover, even if the secondary chamber 4 is abnormally pressurized, the valve element 8 can be prevented from being accidentally opened.

DESCRIPTION OF SYMBOLS 1 Flowing water detection apparatus (simultaneous release valve) 2 Main body 3 Primary chamber 4 Secondary chamber 5 Bulkhead 6 Water flow port 6a Valve seat part 7 Valve mechanism part 8 Valve body 9 Cylinder part 10 Piston chamber 11 Bottom wall 11a External surface 12 Rod 12a Exposed end DESCRIPTION OF SYMBOLS 13 Spring 14 Perimeter wall 15 Pressure reducing path 16 Electric start valve 17 Manual start valve 18 Primary side communication path (1st communication path) 19 Check valve 20 Secondary side communication path (2nd communication path) 21 Check valve 22 Pressure regulation path 23 Bidirectional check valve 23a Valve element 25 Limit switch 26 Water stop valve 27 Water stop valve 28 Primary side pressure gauge 29 Secondary side pressure gauge 30 Pressure switch 31 Drainage path 32 Water stop valve 33 Control valve 34 Operation lever 35 Limit switch 36 Repeater S Filled pre-actuated sprinkler fire extinguishing equipment P1 Primary side piping P2 Secondary side piping FD Fire detector SP Spring head SB Receiver

Claims (3)

A primary chamber, a secondary chamber, and a piston chamber, wherein the primary chamber and the secondary chamber are separated by a valve body, and the valve body is an open valve that opens and closes based on the pressure of the piston chamber;
A first communication path provided with a check valve that allows the primary chamber and the piston chamber to communicate with each other at all times when the valve body is in a closed state, and allows water to flow only from the primary chamber to the piston chamber;
When the valve body is in a closed state, a second communication path provided with a check valve is provided which always communicates the secondary chamber and the piston chamber and allows water to flow only from the secondary chamber to the piston chamber. An opening valve characterized by comprising.   The open valve according to claim 1, wherein the first communication passage and / or the second communication passage is provided in the valve body.   The open valve according to claim 1 or 2, wherein the open valve is provided in a pre-filled water sprinkler fire extinguishing facility, and the primary chamber and the secondary chamber are filled with water during monitoring.

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