JP4750656B2 - Open valve device for fire fighting equipment - Google Patents

Description

The present invention, fire extinguishing equipment for opening valve for spraying water or fire extinguishing agent the valve by the opening operation from the opening operation to fire extinguishing head when subjected to closed hot air in a fire of the thermal head provided in the sensitive heat pipe Relates to the device.

  Conventionally, as a fire extinguishing head installed in a protection section such as a parking facility, for example, there is one shown in FIG. 12 (Patent Document 1). In FIG. 12, an open type radiation diffusing unit 202 is provided at the lower part of the head main body 201, and a heat sensitive operating part 203 is provided at the upper part, and a valve body 236 is provided in the head main body 201 so that the flow path is normally closed. When 203 is operated, the internal pilot valve 236 is opened to radiate fire-fighting water from the radiation spraying part 202.

  The pilot valve 236 includes a communication hole 237 therein, supplies fire-extinguishing water from the head inflow port 206 to the heat-sensitive operation unit 203 side, and lowers the pilot valve 236 by the water pressure of the fire-extinguishing water entering the pilot chamber 240 and closes it. . When the heat-sensitive operation unit 203 is operated, the pilot chamber 240 is opened, and thus the pilot valve 236 is raised so that water for fire extinguishing is radiated from the radiation spraying unit 202.

  However, in such a conventional structure, when the fire extinguishing head is first filled with the fire extinguishing water, the fire extinguishing water may leak from the fire extinguishing head. That is, when fire fighting water flows into the pilot chamber 240 from the head inlet 206 when the fire fighting water is not yet filled, there is no pressure on the pilot chamber 240 side. , And the pilot chamber 240 is filled with water and pressure is generated until the pressure is generated.

An open valve shown in FIG. 13 is known as a countermeasure for preventing such erroneous emission during initial filling (Patent Document 2). In FIG. 13, a valve body 303 is provided in an open valve 301 connected with a heat-sensitive operation unit 307, and a stopper 305 is provided for fixing the movement of the valve body 303 when initial fire-extinguishing water is filled. With this structure, the water filling operation can be performed without opening the valve body 303, so that erroneous water spray from the head can be prevented.
JP 2001-238777 A JP 2001-340485 A

  However, in the open valve for a fire extinguishing head having a structure in which the valve body is fixed by such a stopper, a large number of, for example, more than 1000 pieces are attached to a protection section such as a parking facility. It is very cumbersome to use and charge the water. In addition, the stopper 305 must be removed from the open valves of all the fire-extinguishing nozzles after refilling and the fixation must be released, and the operation is complicated, and if the release is forgotten, the valve body 314 will not move during a fire. May cause a serious problem that radiation is not performed.

The present invention is a fire extinguisher with excellent operability in which the valve body is locked at the time of initial water filling, and the valve body is automatically unlocked when water filling is completed without requiring a manual release operation. It aims at providing the open valve apparatus for facilities.

The present invention provides an open valve device for fire extinguishing equipment. That is, the present invention
A primary port to which pressurized fire-fighting water is supplied;
A secondary port to which a pipe with a fire extinguishing head is connected;
And the heat-sensitive ports sensitive heat pipe having a closed-sensitive thermal head opening operated by the fire are connected,
A valve body that opens and closes a flow path between the primary port and the secondary port;
Said valve body to a closed state by the pressure of the filling of water into sensitive heat pipe pressurized圧消fire water, a valve control mechanism for controlling the valve by the pressure drop of sensitive heat pipe by opening operation of the sensitive heat head in an open state,
A charge lock control mechanism that locks the valve body in the closed position while charging pressurized fire extinguishing water from the primary side to the heat sensitive piping, and releases the lock upon completion of water filling ;
Open valve device for fire extinguishing equipment equipped with

Here, the valve control mechanism is
A piston slidably housed in a cylinder and connected to a valve body;
Formed on one of the piston, a first cylinder chamber communicating with a sensitive thermal port,
A first communication path for introducing pressurized fire-extinguishing water from the primary port into the first cylinder chamber;
A spring that biases the piston in the closing direction of the valve body;
With
The charge lock control mechanism
A second cylinder chamber formed on the other side of the piston;
A second communication passage for introducing pressurized fire-extinguishing water from the primary port into the second cylinder chamber via the first cylinder chamber;
A primary port is provided in a third communication passage that communicates with the second cylinder chamber. The pressurized fire-extinguishing water in the second cylinder chamber is introduced as a control pressure, and when the control pressure is less than a predetermined value, the third port is closed. The communication passage is closed and the valve body is locked in a closed state by the pressure of the piston by the pressure in the first cylinder chamber exceeding the second cylinder chamber, and the third communication passage is opened when the control pressure exceeds the predetermined value. Then, a lock control valve for bringing the valve body into an unlocked state by introducing pressurized fire extinguishing water of the primary port into the second cylinder chamber;
It is provided with.

As another form of the present invention,
The valve control mechanism
A piston slidably housed in a cylinder and connected to a valve body;
Formed on one of the piston, a first cylinder chamber communicating with a sensitive thermal port,
A first communication path for introducing pressurized fire-extinguishing water from the primary port into the first cylinder chamber;
A spring that biases the piston in the closing direction of the valve body;
With
The charge lock control mechanism
A second cylinder chamber formed on the other side of the piston;
A second communication passage for introducing pressurized fire-extinguishing water from the primary port into the second cylinder chamber via the first cylinder chamber;
Connected between the first control port communicating with the second cylinder chamber and the second control port communicating with the primary port, the pressurized fire extinguishing water in the second cylinder chamber is introduced as a control pressure, and the control pressure is a predetermined value. If it is less, the first control port and the second control port are closed and the valve body is locked in the closed state by the pressure of the piston by the pressure of the first cylinder chamber exceeding the second cylinder chamber, and the control pressure is predetermined. When the pressure exceeds the value, the valve is opened so that the valve body can be opened by connecting the first control port and the second control port and introducing the pressurized fire water from the primary port into the second cylinder chamber. A lock control valve to be in a state;
It is provided with.

As another form of the present invention,
The valve control mechanism
A piston slidably housed in a cylinder and connected to a valve body;
Formed on one of the piston, a first cylinder chamber communicating with a sensitive thermal port,
A first communication path for introducing pressurized fire-extinguishing water from the primary port into the first cylinder chamber;
A spring that biases the piston in the closing direction of the valve body;
With
The charge lock control mechanism
A second cylinder chamber formed on the other side of the piston;
The first control port that communicates with the first cylinder chamber is connected to the second control port that communicates with the second cylinder chamber, and the second cylinder chamber is pressurized from the primary port via the first cylinder chamber. A communication pipe for introducing water for fire fighting,
Connected between a second control port that communicates with the second cylinder chamber and a third control port that communicates with the primary port, the pressurized fire extinguishing water in the second cylinder chamber is introduced as a control pressure, and the control pressure is a predetermined value. If it is less, the control port and the third control port are closed, the valve body is locked in the closed state by the pressure of the piston by the pressure of the first cylinder chamber exceeding the second cylinder chamber, and the control pressure is the predetermined value. A lock control valve that opens when the above is reached and introduces pressurized fire extinguishing water of the primary port from the third control port into the second cylinder chamber, and makes the valve body unlockable,
It is provided with.

In another form of the present invention,
The valve control mechanism
A first cylinder disposed on the primary port side with respect to the valve body;
A first piston slidably housed in a first cylinder and connected to a valve body;
Is formed on one of the first piston, a first cylinder chamber communicating with a sensitive thermal port,
A first communication path for introducing pressurized fire-extinguishing water from the primary port into the first cylinder chamber;
A spring that biases the piston in the closing direction of the valve body;
With
The charge lock control mechanism
A second cylinder disposed on the secondary port side with respect to the valve body;
A second piston slidably housed in the second cylinder and connected to the valve body;
A second cylinder chamber partitioned by a second piston;
Connected between the first control port communicating with the primary port and the second control port communicating with the second cylinder chamber, and from the primary port via the third control port communicating with the first cylinder chamber. When the pressure-extinguishing water is introduced as the control pressure and the pressurized fire-extinguishing water is supplied to the primary port, if the control pressure is less than the predetermined value, it closes and disconnects the second cylinder chamber from the primary port side. The valve body is locked in the closed state by the pressing of the first piston, and when the control pressure becomes a predetermined value or more, the valve body is opened to introduce the pressurized fire extinguishing water of the primary port into the second cylinder chamber. A lock control valve that cancels the pressing of the first piston by pressing and sets the unlocked state so that the valve body can be opened;
It is provided with.

According to the present invention, during initial pressurization圧消fire water filled with water, the until the filling of water to sensitive heat pipe connecting the thermal head is completed, pressurized圧消fire water supply to the sensitive heat pipe applied 1 Due to the pressure difference between the secondary cylinder chamber and the secondary cylinder chamber where the pressure increase is delayed with respect to the primary cylinder chamber, the valve body is pressed and locked to the closed position, thereby preventing erroneous spraying from the fire extinguishing head. When the pressure in the secondary cylinder chamber reaches a predetermined set pressure, the lock control valve opens to supply pressurized fire extinguishing water on the primary port side to the second cylinder chamber to eliminate the differential pressure from the primary cylinder chamber. releasing the closing lock by differential pressure of the body, by automatically return to the state that allows opening the valve body opening operation of the thermal head of a fire, it is possible to eliminate the need for work for unlocking.

  FIG. 1 is an explanatory view showing an embodiment of a fire extinguishing facility according to the present invention. In FIG. 1, a fire extinguishing pump 10 and a motor 12 are installed as a fire extinguishing pump facility on the basement floor, etc., and the fire extinguishing pump 10 is operated when the motor 12 is started by the pump control panel 14, and water in the water source water tank 16 is pumped up and pressurized. The water is supplied to the water supply main pipe 18.

  The water supply main pipe 18 is provided with a mixer 20 that mixes the extinguishing agent supplied from the chemical tank 22 and outputs an extinguishing agent aqueous solution. The water supply main pipe 18 on the secondary side of the mixer 20 is raised in the height direction of the building, and the branch pipe 26 is pulled out from the middle of the water supply main pipe 18. A flowing water detection device 28 is provided at a drawing portion of the branch pipe 26.

  The flowing water detection device 28 includes a flowing water detection switch 30 and an opening / closing valve 32 that is opened and closed by remote control. The flowing water detection device 28 detects flowing water in the branch pipe 26, turns on the flowing water detection switch 30, and outputs a flowing water detection signal E1. Further, the control valve 32 is controlled by an external control signal, so that the control valve provided integrally with the flowing water detector 28 can be controlled to open and close.

  The branch pipe 26 on the secondary side of the water flow detector 28 is drawn out to a fire extinguishing target section such as a parking lot, and an open type fire extinguishing head 34 having a heat sensitive head 36 connected to an open valve device 35 according to the present invention is connected. Yes. The leftmost fire extinguishing head 34 has a duct 37 at its installation location. Therefore, an open valve device 35 and a thermal head 36 are installed in an empty space above the duct 37, and the fire extinguishing head 34 is placed under the duct 37. The release valve device 35 is connected by piping. Moreover, as the fire extinguishing head 34 separately arranged by pipe connection with respect to the on-off valve device 35, a plurality of fire extinguishing heads 34 and radiation nozzles may be piped as necessary.

  A terminal test valve 38 is provided at the end of the branch pipe 26, and the secondary side of the terminal test valve 38 is connected to a drain pipe. A fire detector 39 is installed for the fire extinguishing target section where the fire extinguishing head 34 is installed.

On the other hand, a pressure tank 25 is installed in the vicinity of the fire pump 10, and the pressure tank 25 is branched and connected to the water supply main pipe 18 to introduce the pressure in the pipe to compress the internal air, and the pressure is compressed by the internal compressed air. The switch 27 is activated. The pressure switch 27 outputs a pressure detection signal E5 to the pump control panel 14 to activate the fire fighting pump 10 when the pressure inside the water supply main pipe 18 decreases to a predetermined pressure or less by the operation of the fire extinguishing head 34.

  In addition, for the fire pump 10, a basin 31 for supplying priming water is installed. Further, the water supply main pipe 18 is connected to an elevated water tank installed on the rooftop or the like, and receives the water pressure from the elevated water tank so as to maintain the pressure in the pipe.

  Such fire extinguishing equipment is controlled by the control panel 33. A flow detection signal E1 from a flow detection switch 30 provided in the flow detection device 28 and a fire signal E2 from a fire detector 39 are input to the control panel 33. Based on the flow detection signal E1 and the fire signal E2, a control signal is generated. The on / off valve 32 is controlled by E3, and the on / off control of the control valve provided in the flowing water detector 28 is controlled in accordance with the on / off control of the on / off valve 32.

  A medicine tank main valve 24 is provided in the medicine supply pipe from the medicine tank 22 to the mixer 20, and the medicine tank original valve 24 is controlled to open and close by a control signal E 4 from the control panel 33. As the on-off valve 32 provided in the flowing water detector 28 and the chemical tank main valve 24 provided in the chemical supply pipe, a control valve that can be remotely controlled such as an electric valve or an electromagnetic valve is used.

The opening / closing control of the control valve provided in the flowing water detector 28 and the chemical tank main valve 24 by the control panel 33 is as follows.
(1) During normal monitoring, the control valve of the flowing water detection device 28 and the chemical tank main valve 24 are kept open.
(2) When the fire signal E2 is obtained when the running water detection signal E1 is obtained, the control valve of the running water detection device 28 and the chemical tank main valve 24 are kept open.
(3) If the fire signal E2 is not obtained when the running water detection signal E1 is obtained, the control valve and the chemical tank main valve 24 of the running water detection device 28 are controlled to be closed, and then the fire signal E2 When obtained, the control valve of the flowing water detection device 28 and the chemical tank main valve 24 are controlled to be in the open state.

FIG. 2 is a cross-sectional view showing a first embodiment of an open valve device according to the present invention. In FIG. 2, in the release valve device 35 </ b> A of the first embodiment, a cover 42 is screwed and fixed to the upper part of the body 40. On the right side of the body 40 is provided a primary port 44 to which pressurized fire-extinguishing water is supplied from the water supply main pipe 18 side in FIG. 1, and a secondary port 46 for connecting the fire-extinguishing head 34 is provided on the lower side. .

  A valve seat 47 is formed on the inflow side of the secondary port 46 in the body 40, and a valve body 58 is arranged to be openable and closable with respect to the valve seat 47. The valve body 58 is provided with a valve seal 60 on the valve seat 47 side and fixed with a seal presser 62.

  The valve body 58 is driven to open and close by a valve control mechanism using a piston 52 slidably housed in the cylinder 50. The upper shaft portion of the valve body 58 is fixed to a piston 52 slidably accommodated in the cylinder 50. The piston 52 is urged in the closing direction by a spring 55. A first cylinder chamber 54 is formed on the upper side of the piston 52.

  The first cylinder chamber 54 is communicated with the primary port 44 side by a first communication path 64 formed inside the valve body 58. Therefore, when pressurized fire-extinguishing water is supplied to the primary port 44 with the valve body 58 closed, the pressurized fire-extinguishing water is supplied to the first cylinder chamber 54 through the first communication passage 64 of the valve body 58. .

  A thermal port 48 is provided in the upper part of the first cylinder chamber 54, and a closed thermal head 36 is connected to the thermal port 48 by a thermal piping 45.

  A second cylinder chamber 56 is formed below the piston 52. A second communication passage 65 is formed through the piston 52. For this reason, the pressure-extinguishing water supplied to the first cylinder chamber 54 through the first communication passage 64 is further supplied to the second cylinder chamber 56 through the second communication passage 65. A seal 53 is attached to the outer periphery of the piston 52, and the first cylinder chamber 54 and the second cylinder chamber 56 are partitioned.

  The second cylinder chamber 56 on the lower side of the piston 52 communicates with the primary port 44 side by third communication passages 66a and 66b passing through a spool valve hole 68 provided in the middle. The spool valve hole 68 formed in the middle of the third communication passages 66a and 66b is provided with a lock control valve 70 that constitutes the filling lock control mechanism of the present embodiment.

  The lock control valve 70 has seals 74 and 75 attached to the front end side of the spool valve body 72, and the seal 74 causes the third communication passage 66b on the first cylinder chamber 54 side and the third communication passage 66a on the primary port 44 side. Partitioning.

  A spool cover 76 is screwed and fixed to the assembled portion of the spool valve body 72 from outside, and a spring 78 is disposed between the spool valve body 72 and the spool cover 76 to urge the spool valve body 72 in the closing direction. is doing. Further, a threaded portion 80 is formed at the rear portion taken out of the spool valve body 72, and two nuts 82 are screwed into the threaded portion 80, and the spool valve body 72 partitions the third communication passages 66a and 66b in the closed state. Locked after adjusting to the closed position.

  FIG. 3 is an explanatory diagram showing a schematic configuration of the first embodiment of FIG. In the schematic configuration of FIG. 3, a state before pressurized fire-extinguishing water is supplied to the primary port 44 is shown. When pressurized fire-extinguishing water with pressure Pi is supplied to the primary port 44 in this state, the valve body 58 is closed by the force of the spring 55, so the pressurized fire-extinguishing water passes through the first communication path 64. It is supplied to the first cylinder chamber 54 and further supplied from the thermal port 48 to the thermal head 36 through the thermal piping 45. The pressurized fire-extinguishing water supplied to the first cylinder chamber 54 is supplied to the second cylinder chamber 56 through the second communication passage 65.

  Here, assuming that the pressure in the first cylinder chamber 54 is P1 and the pressure in the second cylinder chamber 56 is P2, the changes in the pressures P1 and P2 during the filling of the pressure-extinguishing water for the thermal piping 45 are shown in the time chart of FIG. It becomes like this.

  In FIG. 4, assuming that pressurized fire-extinguishing water is supplied to the primary port 44 at time t 0, the first cylinder chamber accompanies the filling of the thermal piping 45 with the supply of pressurized fire-extinguishing water from the first communication passage 64. The pressure P1 of 54 increases toward the pressure Pi of the primary port 44 over time.

  On the other hand, the pressure P2 in the second cylinder chamber 56 only slightly increases with the passage of time because there is almost no supply from the second communication passage 65 during filling of the heat-sensitive piping 45.

  The pressure P2 by the pressurized fire-extinguishing water supplied to the second cylinder chamber 56 is applied as a control pressure Pc to the lock control valve 70 provided between the third communication passages 66a and 66b. This control pressure Pc generates a force that pushes the spool valve body 72 of FIG.

  Therefore, when the pressure P2 in the second cylinder chamber 56 increases, the control pressure Pc increases. When the pressure reaches the set pressure Pth of the spring 78 at time t1, the lock control valve 70 opens the third communication passages 66a and 66b. Then, pressurized fire-extinguishing water on the primary port 44 side is directly supplied to the second cylinder chamber 56 through the open lock control valve 70, and the pressure P2 rapidly increases from time t1, and the first cylinder chamber It becomes the same pressure as the pressure P1 of 54. The point at which the lock control valve 70 is opened at time t1 is the lock release point 74.

  FIG. 5 is a cross-sectional view showing a state where the lock control valve 70 is opened by reaching the unlock point 74 of FIG. With the opening operation of the lock control valve 70, the third communication passage 66a on the primary port 44 side and the third communication passage 66b on the second cylinder chamber 56 side communicate with each other via the spool valve hole 68. The water for pressurized fire extinguishing being supplied to is directly supplied to the second cylinder chamber 56 through the third communication passages 66a and 66b as shown by the arrows, and the pressure in the second cylinder chamber 56 rapidly increases. become.

  The pressure P2 in the second cylinder chamber 56 is from the time t0 when the supply of pressurized fire-extinguishing water in the time chart of FIG. 4 is started to the lock release point 74 at the time t1 when the lock control valve 70 opens. The pressure P1 in the chamber 54 is below. Therefore, a downward force obtained by adding the force of the spring 55 to the force due to the differential pressure (P1−P2) between the pressures P1 and P2 acts on the piston 52, and this force can lock the valve body 58 in the closed position. it can.

  Therefore, even if pressurized fire-extinguishing water is supplied to the primary port 44, the valve body 58 does not open, and the fire-extinguishing water is supplied to the open-type fire-extinguishing head 34 through the secondary port 46 and misspread. Can be surely prevented.

  Furthermore, when a certain period of time has elapsed from the supply of pressurized fire-extinguishing water, the lock control valve 70 opens as the pressure P2 in the second cylinder chamber 56 increases, and the pressure in the second cylinder chamber 56 increases. The pressure is almost the same as the pressure P1 of the first cylinder chamber 54. As a result, there is no force to push the valve body 58 in the closing direction due to the pressure difference (P1-P2) between the pressure P1 of the first cylinder chamber 54 and the pressure P2 of the second cylinder chamber 56, and the valve body 58 is only by the force of the spring 55. When the thermal head 36 held in the closed position and connected to the thermal port 48 via the thermal piping 45 in this state opens, the valve body 58 can be opened.

  FIG. 6 is a cross-sectional view showing a spraying operation during a fire in the first embodiment. In FIG. 6, when the thermal head 36 is opened by receiving a thermal airflow due to a fire, the pressure-extinguishing water in the first cylinder chamber 54 of the release valve device 35 </ b> A is discharged through the thermal piping 45, and the pressure in the first cylinder chamber 54 is released. P1 decreases.

  The pressure P2 in the second cylinder chamber 56 passes through the throttle formed by the second communication passage 65 with respect to the decrease in the pressure P1 in the first cylinder chamber 54, so that the decrease in the pressure P2 is delayed with respect to the decrease in the pressure P1. The piston 52 is pushed by the higher pressure P2 in the second cylinder chamber 56 and moves upward with respect to the spring 55 to release the valve seal 60 of the valve body 58 from the valve seat 47 and open the valve.

  When the valve seal 60 is separated from the valve seat 47 and the valve body 58 is opened, the valve body 54 is pushed upward by the pressure Pi of pressurized fire-extinguishing water from the primary side, and the spring 55 is compressed to open the illustrated open position. The pressurized fire extinguishing water supplied from the primary port 44 is supplied to the secondary port 46 and sprayed from the fire extinguishing head 34 connected to the secondary port 46 by piping. The thermal head 36 and the fire extinguishing head 34 may be directly attached to the opening valve device 35A, or may be assembled integrally.

  FIG. 7 is a sectional view showing a second embodiment of the open valve device according to the present invention, and FIG. 8 shows a schematic configuration of the second embodiment of FIG.

  In FIG. 7, the second embodiment is characterized in that a lock control valve constituting a water filling lock control mechanism is provided outside by pipe connection.

  In FIG. 7, the release valve device 35 </ b> B of the second embodiment includes a body 86 and a cover 88, and a primary port 90 is formed on the right side of the body 86 and a secondary port 92 is formed on the left side. A partition wall 98 is formed between the primary port 90 and the secondary port 92, and the valve body 102 including the valve seal 104 can be opened and closed with respect to the valve seat 100 provided in the partition wall 98. It is arranged.

  The valve body 102 has a piston 110 formed integrally therewith. The piston 110 is slidably accommodated in a cylinder at the upper part of the body 86, forms a first cylinder chamber 106 at the upper part, and is urged in a closing direction by a spring 111. The piston 110 further forms a second cylinder chamber 108 on the lower side.

A first communication passage 114 extending from the primary port 90 to the first cylinder chamber 106 is formed in the valve body 102. A check valve 115 is provided in the middle of the first communication path 114. The piston 110 is provided with a second communication passage 116 that communicates the first cylinder chamber 106 with the second cylinder chamber 108.

  A thermal port 94 is provided in the upper part of the first cylinder chamber 106, and a thermal piping 95 is connected to the thermal port 94. In this embodiment, two thermal heads 36 are connected to the thermal piping 95, and a manual activation device 96 is further provided on the distal side. A stopper 118 is mounted on the cover 88 side facing the piston 110 to determine the position of the piston 110 in the open state.

  A first control port C1 is formed on the right side of the second cylinder chamber 108, and a second control port C2 is formed on the primary port 90 side. Between the first control port C1 and the second control port C2, The lock control valve 120 is connected by a communication pipe 125.

Lock control valve 120 includes a set spring 122, exceeds the set pressure Pth that control pressure Pc is set by the setting spring 122 supplied by the control pipe 127, performs the opening operation, the first control port C1 second Communication between the control ports C2 is established.

  An orifice 124 is provided in the communication pipe 125 on the first control port C1 side with respect to the lock control valve 120, and a check valve 126 is provided in the communication pipe 125a on the second control port C2 side.

  Next, the operation of the open valve device 35B of the second embodiment will be described with reference to the schematic configuration of FIG. Prior to the use of the fire extinguishing equipment, when pressurized fire extinguishing water having a pressure Pi is initially supplied to the primary port 90, the valve body 102 is closed by the force of the spring 111 in the initial state. The pressurized fire-extinguishing water supplied to the next port 90 flows to the first cylinder chamber 106 through the first communication passage 114 and the check valve 115 of the valve body 102, and further flows from the heat-sensitive port 94 to the heat-sensitive piping 95 to fill the water. To start. The pressurized fire-extinguishing water that has flowed into the first cylinder chamber 106 flows into the second cylinder chamber 108 through the second communication passage 116.

  Here, if the pressure in the first cylinder chamber 106 is P1 and the pressure in the second cylinder chamber 108 is P2, the pressure P2 in the second cylinder chamber 108 is the lock control valve 120 as in the time chart of FIG. 4 in the first embodiment. Since the pressure is lower than the pressure P1 in the first cylinder chamber 106 until the time t1 when the set pressure 122 reaches the set pressure Pth by the set spring 122, the piston 110 is moved by the pressure difference between the two (P1-P2). The valve body 102 is locked in the closed position by a force obtained by adding the force of the spring 111 to the force pushing downward.

  When the pressure in the first cylinder chamber 106 increases due to the progress of water filling in the thermal piping 95, the pressure P2 in the second cylinder chamber 108 also increases, reaches the lock release point 74 at time t1 in FIG. Opens. That is, when the control pressure Pc due to the pressure P2 in the second cylinder chamber 108 exceeds the set pressure Pth due to the set spring 122, the lock control valve 120 performs an opening operation, and between the first control port C1 and the second control port C2. Communicate.

  For this reason, the pressure-extinguishing water supplied to the primary port 90 passes through the second control port C2, the check valve 126, the unlocked lock control valve 120, and the orifice 124 into the second cylinder chamber 108. As shown in FIG. 4, the pressure P2 suddenly increases from the unlock point 74 and becomes the same pressure as the pressure P1 in the first cylinder chamber 106, and the valve body 102 is locked due to the pressure difference (P1-P2). The state is released, and the valve body 102 is shifted to a state in which the valve body 102 can be opened as the thermal head 36 is opened.

  During the subsequent monitoring, when the thermal head 36 is opened due to a thermal air flow due to a fire, the pressure P1 is reduced by releasing the pressurized fire-extinguishing water in the first cylinder chamber 106, and the valve is reduced as the pressure P1 decreases. When the body 102 is opened, and once opened, the valve body 102 moves to the open position against the spring 111 due to the pressure of the pressurized fire water from the primary port 90 with respect to the valve body 102, and is supplied from the primary port 90. The pressurized fire-extinguishing water is supplied to the fire-extinguishing head 34 through the secondary port 92 and sprayed.

  FIG. 9 is a sectional view showing a third embodiment of the valve opening device according to the present invention, and FIG. 10 shows a schematic configuration of the third embodiment. In the third embodiment, the lock control valve constituting the water filling lock control mechanism is connected to the outside by piping, and the communication path connecting the first cylinder chamber and the second cylinder chamber is also connected by external piping. It is characterized by that.

  In FIG. 9, the open valve device 35 </ b> C of the third embodiment has a cover 132 attached and fixed to the upper part of the body 130. A primary port 134 is formed on the left side of the body 130, and a secondary port 135 is formed on the right side, and a partition wall 138 that partitions the two is provided therebetween. A valve hole 140 is provided in the partition wall 138, and a valve seat 143 is formed in a portion on the primary port 134 side.

  A valve element 144 having a valve seal 146 that contacts the valve seat 143 is disposed in the valve hole 140 so as to be freely opened and closed. The valve body 144 is screwed into a rod portion integrally extending below the piston 142 and is further fixed to the tip of the guide rod 145, and the guide rod 145 is slidably inserted into the cover 132 at the top.

  The piston 142 is slidably provided on the cylinder side provided on the cover 132 side, and a first cylinder chamber 148 is formed above the piston 142 and a second cylinder chamber 150 is formed below the piston 142.

Sensitive port 136 is provided on the upper right side of the first cylinder chamber 148, the heat-sensitive port 136 connects the thermal head 136 by thermal piping 13 7. A first control port C1 is provided on the upper left side of the first cylinder chamber 148, while a second control port C2 is provided on the left side of the second cylinder chamber 150.

  The first control port C1 of the first cylinder chamber 148 and the second control port C2 of the second cylinder chamber 150 are connected by a communication pipe 152, and an orifice 162 is provided in the middle of the communication pipe 152.

  Further, a lock control valve 156 is connected between a communication pipe 154 from the third control port C3 provided in the primary port 134 and a communication pipe 152 from the first control port C1 of the first cylinder chamber 148. The lock control valve 156 sets a setting pressure Pth for opening operation by the setting spring 158, and opens when the force by the control pressure Pc applied by the control pipe 160 exceeds the setting pressure Pth of the setting spring 158.

  As the control pressure Pc for opening and closing the lock control valve 156, the pressure P2 of the second cylinder chamber 150 obtained from the second control port C2 to which the communication pipe 152 is connected is used.

  Next, the operation of the on-off valve device 35C of the third embodiment will be described with reference to the schematic configuration of FIG. In the fire-extinguishing equipment, when the initial pressurized fire-extinguishing water is supplied to the primary port 134, the valve body 144 is in the closed position by the force of the spring 147 at this time. It flows into the first cylinder chamber 148 through the communication passage 151, and is charged from the thermal port 136 through the thermal piping 137 to the thermal head 36 side.

  Further, the pressurized fire-extinguishing water supplied to the first cylinder chamber 148 is supplied from the second control port C2 to the second cylinder chamber 150 through the communication pipe 152 from the first control port C1. As shown in the time chart of FIG. 4, the pressure P1 in the first cylinder chamber 148 is higher than the pressure P2 in the second cylinder chamber 150 and the differential pressure (P1- The force due to P2) is generated in the piston 142, and together with the force due to the spring 147, the valve body 144 is locked in the closed position, and erroneous spraying from the fire extinguishing head 34 is prevented.

  When the heat-sensing pipe 137 is charged, the pressure P2 in the second cylinder chamber 150 increases with the increase in the pressure P1 in the first cylinder chamber 148, and the second pressure applied to the lock control valve 156 as the control pressure Pc. When the pressure P2 in the cylinder chamber 150 reaches the set pressure Pth by the set spring 158, the lock control valve 156 opens.

  For this reason, the third control port C3 and the second control port C2 communicate with each other, and the pressure fire extinguishing water supplied to the primary port 134 is supplied to the second cylinder chamber 150, so that the pressure P2 rapidly increases. Then, the pressure becomes the same as the pressure P1 of the first cylinder chamber 148, the lock to the closed position of the valve body 144 by the differential pressure (P1-P2) is released, and the monitoring state is entered when the water filling is completed.

  During the subsequent monitoring, when the thermal head 36 is opened by receiving a thermal air current due to a fire, the pressure P1 in the first cylinder chamber 148 is released, so that the piston 142 receives the pressure P2 in the second cylinder chamber 150 and the valve body. When the valve body 144 is opened and the valve body 144 is opened, the valve body 144 is moved to the open position under the pressure of the primary side of the pressurized fire-extinguishing water, and the pressurized fire-extinguishing water supplied to the primary port 140 is The fuel is supplied to the secondary port 135 through the valve body 144 in the open state and sprayed from the fire extinguishing head 134.

  Note that. A fail-safe mechanism that forcibly releases the lock may be provided by separately connecting the second control port C2 and the third control port C3 via a manual switching valve and opening the manual switching valve.

  FIG. 11 is an explanatory view schematically showing a fourth embodiment of the open valve device according to the present invention. In the fourth embodiment, the second cylinder chamber is provided on the primary port side in the first to third embodiments, whereas the second cylinder chamber is provided in the fourth embodiment. It is characterized in that it is provided on the secondary port side.

  In FIG. 11, the open valve device 35D of the fourth embodiment is provided with a primary port 170 to which pressurized fire-fighting water is supplied on the left side of the body 168, and a secondary port 172 to which the fire-extinguishing head 34 is connected to the right side. Provided. A valve body 177 is provided so as to be openable and closable with respect to the valve seat at the partition wall portion between the primary port 170 and the secondary port 172.

  A first piston 176 is slidably provided on an upper portion of the valve body 177 positioned on the primary port 170 side, and a first cylinder chamber 174 is formed on the upper portion of the first piston 176. The valve body 177 is urged in the closing direction by the spring 175. A thermal port 173 is provided in the first cylinder chamber 174, and the thermal head 36 is connected by a thermal piping 179.

  Further, the primary port 170 side is connected to the first cylinder chamber 174 through a check valve 184 by a pipe 182. Instead of connecting to the primary port 170 side by the pipe 182, a communication path that connects the primary port 170 side and the first cylinder chamber 174 to the first piston 176 itself may be formed.

  On the other hand, a second cylinder chamber 178 is formed on the secondary port 172 side of the body 168, and the second piston 180 connected to the first piston 176 is slidably accommodated. A first control port C1 is provided in the second cylinder chamber 178, a second control port C2 is provided on the primary port 170 side, and a lock control valve 190 is provided between them by a communication pipe 186. .

  The lock control valve 190 sets a setting pressure Pth for opening the valve by a setting spring 192, and opens when the control pressure Pc by the control pipe 188 reaches the setting pressure Pth. A control pipe 188 for the lock control valve 190 is connected to the third control port C3 of the first cylinder chamber 174, and the control pipe 188 is provided with an orifice 196 in the middle.

  Next, operation | movement of the open valve apparatus 35D of 4th Embodiment is demonstrated. When the initial pressurized fire-extinguishing water for filling the piping in the fire extinguishing equipment is supplied to the primary port 170, the valve body 177 is closed by the spring 175 at this time, and the primary port 170. Is supplied to the first cylinder chamber 174 from the external pipe 182 through the check valve 184, and is further charged to the thermal pipe 179 side through the thermal port 173.

  The pressure P1 in the first cylinder chamber 174 has a low pressure during filling with respect to the thermal piping 179 side, and gradually increases as the filling proceeds.

  In addition, the water filling to the heat sensitive piping 179 side locks the valve body 177 in the closed position by a force obtained by combining the force of the first piston 176 with the spring 175 and the force of the pressure P1 applied to the first cylinder chamber 174.

  When the water filling progresses and the pressure P1 in the first cylinder chamber 174 reaches the set pressure Pth by the set spring 192 of the lock control valve 190, the lock control valve 190 opens. Therefore, pressurized fire-extinguishing water on the primary port 170 side is supplied to the second cylinder chamber 178 via the communication pipe 186, the pressure P2 in the second cylinder chamber 178 increases, and the second piston 180 moves upward, that is, the valve body. It will push in the opening direction of 177.

  Here, when the pressure receiving area of the first piston 176 and the pressure receiving area of the second piston 180 are the same, the force in the closing direction due to the pressure P1 of the first cylinder chamber 174 applied to the first piston 176 and the second cylinder chamber 178 The force in the opening direction of the valve body 177 applied to the second piston 180 by the pressure P2 is almost coincidentally canceled out, and the valve body 177 is in an openable state where only the force in the closing direction by the spring 175 is applied.

  When charging is completed through unlocking in this way, a normal monitoring state is entered. During the subsequent monitoring, when the thermal head 36 is opened by receiving a thermal airflow due to a fire, the pressure in the first cylinder chamber 174 is released, and the valve in response to the force in the opening direction of the piston 180 due to the pressure in the second cylinder chamber 178 is received. Once the body 177 is opened and the valve body 177 is opened, the pressure-extinguishing water from the primary port 170 is received and fixed at the open position, and the pressure-extinguishing water is supplied from the fire-extinguishing head 34 connected to the secondary port 172. Will be sprayed.

Note that the check valves 115 and 126 and the orifice 124 provided in the second embodiment of FIGS. 7 and 8 are not necessarily provided. This point is the same for the check valve 164 and orifice 162 of the third embodiment but also further the check valve 18 4 及 beauty orifice 196 of the fourth embodiment.

  In the present invention, in addition to the first cylinder chamber formed on one side of the piston for opening and closing the valve, the second cylinder chamber is formed on the opposite side, and the pressure rise via the second cylinder chamber is increased. The lock control valve is controlled by a delay, and the lock is released when the filling is completed from the locked state during filling, and the present invention is applied as it is to an appropriate structure having such a basic function. can do.

  Moreover, although this embodiment is applied to a foam fire extinguishing equipment as shown in FIG. 1, it can also be applied to a sprinkler fire extinguishing equipment or the like.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and the present invention is not limited by the numerical values shown in the above embodiments.

FIG. 1 is an explanatory view of a fire extinguishing equipment using an open valve device of the present invention. Sectional drawing which showed 1st Embodiment of the open valve apparatus by this invention Explanatory drawing which showed the typical structure of 1st Embodiment of FIG. The time chart which showed the pressure change of the 1st cylinder room and the 2nd cylinder room at the time of filling in a 1st embodiment Sectional drawing which showed operation | movement in the filling water in 1st Embodiment Sectional drawing which showed spraying operation at the time of fire in 1st Embodiment Sectional drawing which showed 2nd Embodiment of the open valve apparatus by this invention Explanatory drawing which showed the typical structure of 2nd Embodiment of FIG. Sectional drawing which showed 3rd Embodiment of the open valve apparatus by this invention Explanatory drawing which showed the typical structure of 3rd Embodiment of FIG. Explanatory drawing which showed 4th Embodiment of the open valve apparatus by this invention by typical structure Explanatory drawing of a fire extinguishing head equipped with a conventional open valve Explanatory drawing of a fire extinguishing head equipped with a conventional open valve with a valve element fixed by a pin

Explanation of symbols

10: Fire pump 12: Motor 14: Pump control panel 16: Water source water tank 18: Water supply main 20: Mixer 22: Drug tank 24: Drug tank original valve 25: Pressure tank 26: Branch pipe 27: Pressure switch 28: Flowing water Detection device 30: Flowing water detection switch 31: Expiratory water tank 33: Control panel 32: Open / close valve 34: Fire extinguishing head 35A to 35D: Open / close valve device 36: Thermal head 38: Terminal test valve 39: Fire detectors 40, 86, 130 168: body 42,88,132: cover 44,90,134,170: the primary port 45,95,137,179: sensitive heat pipe 46,92,135,172: secondary port 47,100,143: valve Seats 48, 94, 136, 173: thermal ports 50, 94: cylinders 52, 110, 142: pistons 53, 74, 75, 112: seals 54, 106, 48, 174: first cylinder chambers 55, 78, 111, 147: springs 56, 108, 150, 178: second cylinder chambers 58, 102, 144, 177: valve bodies 60, 104, 146: valve seals 62: seals Pressers 64, 114: First communication path 65, 116: Second communication path 66a, 66b: Third communication path 68: Spool holes 70, 120, 156, 190: Lock control valve 72: Spool valve body 76: Spool cover 80 : Screw part 82: Nut 98: Partition walls 115, 126, 16 4: Check valve 118: Stopper 122, 158, 192: Setting spring 124, 162, 196: Orifice 125, 152, 186: Communication pipe 127, 160, 188: Control pipe 140: Valve hole 145: Guide rod 154: Pipe 176: First piston 180: Second piston C : First control port C2: second control port C3: third control port

Claims (4)

A primary port to which pressurized fire-fighting water is supplied;
A secondary port to which a pipe with a fire extinguishing head is connected;
A thermal port to which a thermal piping with a closed thermal head that is opened by fire is connected;
A valve body for opening and closing a flow path between the primary port and the secondary port;
A valve control mechanism for closing the valve body by pressure of pressurized fire-extinguishing water filled in the thermal piping, and controlling the valve body to an open state by a pressure drop of the thermal piping due to an opening operation of the thermal head;
A charge lock control mechanism that locks the valve body in a closed position while filling the heat-sensitive piping with pressurized fire-fighting water from the primary port side, and releases the lock when the charge is completed;
In an open valve device for fire extinguishing equipment, comprising:
The valve control mechanism is
A piston slidably housed in a cylinder and connected to the valve body;
Formed on one of said piston, a first cylinder chamber communicating with the sensitive heat port,
A first communication path for introducing pressurized fire-extinguishing water from the primary port into the first cylinder chamber;
A spring for urging the piston in the closing direction of the valve body;
With
The charge lock control mechanism is
A second cylinder chamber formed on the other side of the piston;
A second communication passage for introducing pressurized fire-extinguishing water from the primary port into the second cylinder chamber via the first cylinder chamber;
The primary port is provided in a third communication passage that communicates with the second cylinder chamber, introduces pressurized fire-extinguishing water in the second cylinder chamber as a control pressure, and closes when the control pressure is less than a predetermined value Then, the valve body is locked in the closed state by the pressure of the piston by the pressure of the first cylinder chamber exceeding the second cylinder chamber by closing the third communication passage, and the control pressure is equal to or higher than the predetermined value. A lock control valve that opens the third communication passage and introduces pressurized fire-extinguishing water from the primary port into the second cylinder chamber, thereby bringing the valve body into an unlocked state that can be opened; ,
An open valve device for fire extinguishing equipment, comprising:
A primary port to which pressurized fire-fighting water is supplied;
A secondary port to which a pipe with a fire extinguishing head is connected;
A thermal port to which a thermal piping with a closed thermal head that is opened by fire is connected;
A valve body for opening and closing a flow path between the primary port and the secondary port;
A valve control mechanism for closing the valve body by pressure of pressurized fire-extinguishing water filled in the thermal piping, and controlling the valve body to an open state by a pressure drop of the thermal piping due to an opening operation of the thermal head;
A charge lock control mechanism that locks the valve body in a closed position while filling the heat-sensitive piping with pressurized fire-fighting water from the primary port side, and releases the lock when the charge is completed;
In an open valve device for fire extinguishing equipment, comprising:
The valve control mechanism is
A piston slidably housed in a cylinder and connected to the valve body;
Formed on one of said piston, a first cylinder chamber communicating with the sensitive heat port,
A first communication path for introducing pressurized fire-extinguishing water from the primary port into the first cylinder chamber;
A spring for urging the piston in the closing direction of the valve body;
With
The charge lock control mechanism is
A second cylinder chamber formed on the other side of the piston;
A second communication passage for introducing pressurized fire-extinguishing water from the primary port into the second cylinder chamber via the first cylinder chamber;
Connected between a first control port communicating with the second cylinder chamber and a second control port communicating with the primary port, introducing pressurized fire-extinguishing water in the second cylinder chamber as a control pressure, and controlling the control When the pressure is less than a predetermined value, the valve body is closed by separating the first control port and the second control port and pressing the piston by the pressure of the first cylinder chamber exceeding the second cylinder chamber When the control pressure becomes equal to or higher than the predetermined value, the first control port and the second control port are communicated to supply pressurized fire extinguishing water from the primary port to the second cylinder chamber. A lock control valve for bringing the valve body into an unlocked state by introducing the valve body,
An open valve device for fire extinguishing equipment, comprising:
A primary port to which pressurized fire-fighting water is supplied;
A secondary port to which a pipe with a fire extinguishing head is connected;
A thermal port to which a thermal piping with a closed thermal head that is opened by fire is connected;
A valve body for opening and closing a flow path between the primary port and the secondary port;
A valve control mechanism for closing the valve body by pressure of pressurized fire-extinguishing water filled in the thermal piping, and controlling the valve body to an open state by a pressure drop of the thermal piping due to an opening operation of the thermal head;
A charge lock control mechanism that locks the valve body in a closed position while filling the heat-sensitive piping with pressurized fire-fighting water from the primary port side, and releases the lock when the charge is completed;
In an open valve device for fire extinguishing equipment, comprising:
The valve control mechanism is
A piston slidably housed in a cylinder and connected to the valve body;
Formed on one of said piston, a first cylinder chamber communicating with the sensitive heat port,
A first communication path for introducing pressurized fire-extinguishing water from the primary port into the first cylinder chamber;
A spring for urging the piston in the closing direction of the valve body;
With
The charge lock control mechanism is
A second cylinder chamber formed on the other side of the piston;
A first control port communicating with the first cylinder chamber is connected to a second control port communicating with the second cylinder chamber, and the primary cylinder is connected to the second cylinder chamber via the first cylinder chamber. A communication pipe for introducing pressurized fire-fighting water from the port;
Connected between the second control port communicating with the second cylinder chamber and a third control port communicating with the primary port, introducing pressurized fire-extinguishing water in the second cylinder chamber as a control pressure, When the control pressure is less than a predetermined value, the valve body is closed by disconnecting the control port and the third control port and pressing the piston by the pressure of the first cylinder chamber exceeding the second cylinder chamber The valve body is opened when the control pressure becomes equal to or higher than the predetermined value, and the pressurized fire water for the primary port is introduced from the third control port into the second cylinder chamber. A lock control valve for releasing the lock,
An open valve device for fire extinguishing equipment, comprising:
A primary port to which pressurized fire-fighting water is supplied;
A secondary port to which a pipe with a fire extinguishing head is connected;
A thermal port to which a thermal piping with a closed thermal head that is opened by fire is connected;
A valve body for opening and closing a flow path between the primary port and the secondary port;
A valve control mechanism for closing the valve body by pressure of pressurized fire-extinguishing water filled in the thermal piping, and controlling the valve body to an open state by a pressure drop of the thermal piping due to an opening operation of the thermal head;
A charge lock control mechanism that locks the valve body in a closed position while filling the heat-sensitive piping with pressurized fire-fighting water from the primary port side, and releases the lock when the charge is completed;
In an open valve device for fire extinguishing equipment, comprising:
The valve control mechanism is
A first cylinder disposed on the primary port side with respect to the valve body;
A first piston slidably housed in the first cylinder and connected to the valve body;
Formed on one of said first piston, a first cylinder chamber communicating with the sensitive heat port,
A first communication path for introducing pressurized fire-extinguishing water from the primary port into the first cylinder chamber;
A spring for urging the piston in the closing direction of the valve body;
With
The charge lock control mechanism is
A second cylinder disposed on the secondary port side with respect to the valve body;
A second piston slidably housed in the second cylinder and connected to the valve body;
A second cylinder chamber partitioned by the second piston;
The primary control port is connected between a first control port communicating with the primary port and a second control port communicating with the second cylinder chamber, and passes through the third control port communicating with the first cylinder chamber. When the pressurized fire-extinguishing water from the port is introduced as a control pressure, and the pressurized fire-extinguishing water is supplied to the primary port, if the control pressure is less than a predetermined value, the second cylinder chamber is closed. Disconnecting from the primary port side, the valve body is locked in a closed state by pressing the first piston, and when the control pressure becomes equal to or higher than the predetermined value, an opening operation is performed to supply pressurized fire extinguishing water in the primary port. A lock control valve that is introduced into the second cylinder chamber and cancels the pressing of the first piston by the pressing of the second piston, thereby bringing the valve body into an unlocked state capable of being opened;
An open valve device for fire extinguishing equipment, comprising:

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