JP2013042852A - Valve for sprinkler equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve for sprinkler equipment, certainly opening pipe lines even to a fire in time of a power failure with a device scale and cost equivalent to before.SOLUTION: A drive device 4 of this valve for the sprinkler equipment changes over the water pressure introduction state of a water pressure cylinder 5 into which the water pressure of a primary side pipe line A is introduced by a solenoid valve 7 when having received a fire sensing signal to operate a piston 12 of the water pressure cylinder 5, and open-drives a valve element 2 connected to the piston 12. In the valve, by only operating the solenoid valve 7 by a compact uninterruptible power supply device or the like even to the fire in time of the power failure, the valve element 2 is certainly open-driven to open the pipe line A and a pipe line B, and the valve for the sprinkler equipment does not need dedicated electric storage equipment or power generation equipment directly driving the valve element to suppress the device scale or the cost to the same degree as before.

Description

  The present invention relates to a valve for opening and closing a pipe of a sprinkler facility.

  Some sprinkler equipment is called pre-actuated so that it does not operate when the sprinkler head breaks during a non-fire. This pre-actuated sprinkler system is equipped with a valve with a valve body that opens and closes the pipe in the middle of the pipe connected upstream to the water pressure source and connected downstream to the sprinkler. Based on the fire detection signal, the valve body of the valve is opened to open the pipe, and when the sprinkler head is subsequently opened by heat, water discharge is started (see, for example, Patent Document 1).

JP 2009-142601 A

  By the way, the valve provided in the pre-actuated sprinkler equipment as described above requires a drive power such as a motor for driving the valve body. Even if the signal is received, the driving device does not operate and the piping may not be opened.

  For this, it is conceivable to attach a dedicated power storage facility or power generation facility to the valve. However, if such a facility is installed, the entire device of the valve will be enlarged and a larger installation space will be required. Not only will the manufacturing cost and maintenance cost increase.

  Therefore, an object of the present invention is to provide a sprinkler equipment valve that can reliably open a pipe even in the event of a power failure, with a device scale and cost equivalent to those of a conventional apparatus.

  In order to solve the above problems, in the present invention, for a sprinkler facility comprising a valve body that opens and closes a pipe of the sprinkler facility, and a drive device that opens the valve body in response to a fire detection signal from a fire detector. In the valve, as the drive device, a piston of a hydraulic cylinder into which the primary water pressure of the pipe is introduced is connected to the valve body, and when the fire detection signal is received, the water pressure introduction state of the hydraulic cylinder is switched. Thus, the one that actuates the piston to drive the valve body to open is adopted.

  That is, when the valve drive device receives a fire detection signal, it switches the water pressure introduction state of the water pressure cylinder to which the water pressure on the primary side of the pipe is introduced and opens the valve body connected to the piston of the water pressure cylinder. By doing so, even in the event of a fire during a power outage, without switching to a dedicated power storage facility or power generation facility, just switching the water pressure introduction state of the hydraulic cylinder using a small uninterruptible power supply, etc. The valve body was reliably driven to open so that the piping could be opened.

  The present invention can be applied particularly effectively to a butterfly valve type sprinkler equipment valve in which the valve body rotates integrally with a valve stem to open and close a pipe. In that case, a conversion mechanism for converting the linear motion of the piston into the rotational motion of the valve rod may be provided between the valve rod and the hydraulic cylinder.

  As described above, the sprinkler equipment valve of the present invention switches the water pressure introduction state of the hydraulic cylinder when the drive device receives a fire detection signal, and opens the valve body connected to the piston of the hydraulic cylinder. Since it is designed to be driven, the valve can be reliably opened to open the pipe even in the event of a power outage without the need for a dedicated power storage facility or power generation facility. The scale and cost can be reduced to the same level as the conventional one.

a and b are schematic views showing the normal state and the fire state of the sprinkler equipment valve of the first embodiment, respectively. a and b are schematic views showing states of the sprinkler equipment valve of the second embodiment at the normal time and when a fire occurs, respectively.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment. This sprinkler equipment valve rotates integrally with a valve body 2 that opens and closes pipes A and B in a valve box 1 that connects a primary side pipe A and a secondary side pipe B of the sprinkler equipment. A butterfly valve type provided with a valve stem 3 that includes a drive device 4 that opens the valve body 2 by receiving a fire detection signal from a fire detector (not shown) and rotationally driving the valve stem 3. Yes.

  The sprinkler equipment provided with this valve is a pre-actuated type, and although not shown, the primary side pipe A is connected to the water pressure source and the secondary side pipe B is connected to the sprinkler, and the sprinkler head is connected to the sprinkler head. Is provided with a heat-sensitive part that seals the secondary side pipe B at room temperature and melts when the temperature rises to a predetermined temperature. Each of the primary side pipe A and the secondary side pipe B is filled with water, the inside of the primary side pipe A is in a pressurized state of about 1.4 MPa, and the inside of the secondary side pipe B is filled with a vacuum pump. The negative pressure is maintained at about -0.08 MPa.

  The valve drive unit 4 includes a hydraulic cylinder 5 into which the hydraulic pressure of the primary side pipe A is introduced, a hydraulic pressure introduction pipe 6 that connects the primary side of the valve box 1 and the hydraulic cylinder 5, and a hydraulic pressure in the middle of the hydraulic pressure introduction pipe 6. And a solenoid valve 7 for switching a water pressure introduction state of the cylinder 5. The electromagnetic valve 7 is connected to a drain pipe 8 for releasing the water pressure in the hydraulic cylinder 5 when the introduction of water pressure to the hydraulic cylinder 5 is cut off, and a flow rate adjusting valve (speed controller) 9 is provided in the drain pipe 8. ing. Further, the water pressure introduction pipe 6 is provided with a check valve 10 between the valve box 1 and the electromagnetic valve 7 so that water does not flow backward from the hydraulic cylinder 5 to the valve box 1.

  The hydraulic cylinder 5 includes a hydraulic chamber 11 into which hydraulic pressure is introduced. A piston 12 that reciprocates in a state where the hydraulic chamber 11 is sealed, and a spring 13 that biases the piston 12 toward the hydraulic chamber 11. And a rotating shaft 14 connected to the valve stem 3 so as to be able to transmit rotation. Then, the tip end portion of the arm 15 protruding from the outer periphery of the rotating shaft 14 is slidably connected to the piston 12 in a direction perpendicular to the reciprocating motion, thereby converting the linear motion of the piston 12 into the rotational motion of the valve stem 3. A conversion mechanism for conversion is configured.

  The valve box 1 is connected to a communication pipe 16 that communicates the primary side and the secondary side. The communication pipe 16 is provided with a bypass valve 17 that opens and closes the communication pipe 16 and a pressure gauge 18 that measures the water pressure on each of the primary side and the secondary side.

  A flowing water detector 19 is provided on the secondary side of the valve box 1. The water flow detector 19 has a water intake pipe 20 connected to the secondary side of the valve box 1, a warning pressure switch 21 attached to the end thereof, a signal stop valve 22 in the middle of the water intake pipe 20, and a water intake pipe 20. A drain valve 24 is provided in the middle of the drain pipe 23 branched from the pipe.

  Next, the operation of this valve will be described. During normal times when no fire has occurred, as shown in FIG. 1 (a), the solenoid valve 7 of the drive unit 4 communicates the primary side of the valve box 1 and the hydraulic chamber 11 of the hydraulic cylinder 5, The water pressure of the pipe A is introduced into the water pressure chamber 11 of the water pressure cylinder 5. Due to this water pressure, the piston 12 in the hydraulic cylinder 5 remains in a predetermined position against the urging force of the spring 13, and the valve body 2 in the valve box 1 is maintained in a state where the pipes A and B are closed. .

  At this time, the flowing water detection device 19 is in a state where the signal stop valve 22 is opened and the drain valve 24 is closed, but the secondary side of the valve box 1 (in the secondary side pipe B) is in a negative pressure state. The hydrostatic pressure introduced into the intake pipe 20 is low and the pressure switch 21 does not operate.

  On the other hand, when a fire occurs, when the drive device 4 receives a fire detection signal, the electromagnetic valve 7 is excited and simultaneously shuts off the introduction of water pressure into the water pressure chamber 11 of the water pressure cylinder 5 as shown in FIG. The hydraulic chamber 11 is communicated with the drain pipe 8. Thereby, the water pressure in the water pressure chamber 11 is released, and the piston 12 moves to the water pressure chamber 11 side by the biasing force of the spring 13. This linear motion of the piston 12 is converted into the rotational motion of the valve stem 3 by the aforementioned conversion mechanism, the valve body 2 rotates together with the valve stem 3 to open the pipes A and B, and the sprinkler equipment is in a pre-operating state. Become.

  Further, when the pipes A and B are opened and water is supplied from the primary side pipe A to the secondary side pipe B, the hydrostatic pressure introduced into the intake pipe 20 rapidly increases, and the pressure switch of the flowing water detector 19 21 is activated, and an alarm is sent to inform the administrator that the sprinkler facility is in a pre-operation state.

  And in this pre-operation state, when the said sprinkler head is open | released with a heat | fever, water discharge is started from a sprinkler head. In addition, since the sprinkler equipment is not in a pre-operation state at the time of non-fire, water is not discharged even if the sprinkler head is broken and opened.

  As described above, this sprinkler equipment valve switches the water pressure introduction state of the water pressure cylinder 5 to which the water pressure of the primary side pipe A is introduced by the electromagnetic valve 7 when the driving device 4 receives the fire detection signal, Since the valve body 2 connected to the piston 12 of the hydraulic cylinder 5 is opened, a small uninterruptible power supply provided in the valve operation panel, building management room, etc., in the event of a power failure By operating the electromagnetic valve 7 with a device or the like, the valve body 2 can be driven to open reliably and the pipes A and B can be opened. In addition, since a dedicated power storage facility and power generation facility for directly driving the valve body are not required, it can be installed in the same space as a conventional valve, and the manufacturing cost and maintenance cost are not significantly different from the conventional one. Further, since the spring 13 for urging the piston 12 is provided on the hydraulic cylinder 5, the connection structure between the hydraulic cylinder and its solenoid valve is simple and advantageous in terms of cost compared to the valve of the second embodiment described later. is there.

  FIG. 2 shows a second embodiment. Since this embodiment uses the drive device 25 (hydraulic cylinder 26 and electromagnetic valve 27) whose structure is partially changed based on the first embodiment, the difference will be mainly described below and the other parts. Description of is omitted.

  The hydraulic cylinder 26 of the drive device 25 of this embodiment has a first hydraulic chamber 28 and a second hydraulic chamber 29 formed therein, and the first piston 30 reciprocates in a state where the hydraulic chambers 28 and 29 are sealed. And it has the rod 32 which connects the 2nd piston 31 and both pistons 30 and 31 so that it may reciprocate integrally. Then, the tip of the arm 15 of the rotating shaft 14 connected to the valve rod 3 so as to be able to transmit rotation is connected to the rod 32 so as to be slidable in a direction perpendicular to the reciprocating motion, thereby causing linear motion of both pistons 30 and 31. A conversion mechanism for converting the rotary motion of the valve stem 3 is configured.

  2A, the solenoid valve 27 communicates the primary side of the valve box 1 with the first hydraulic chamber 28 of the hydraulic cylinder 26, and drains the second hydraulic chamber 29 of the hydraulic cylinder 26. The pipe 8 is communicated. As a result, the water pressure is introduced into the first water pressure chamber 28 of the water pressure cylinder 26, the water pressure in the second water pressure chamber 29 is released, and the pistons 30, 31 remain in a predetermined position. The state where the pipes A and B are closed is maintained.

  On the other hand, in the event of a fire, as shown in FIG. 2 (b), the excited solenoid valve 27 communicates the primary side of the valve box 1 and the second hydraulic chamber 29, contrary to the state of FIG. 2 (a). The first hydraulic chamber 28 is communicated with the drain pipe 8. As a result, the water pressure is introduced into the second water pressure chamber 29, the water pressure in the first water pressure chamber 28 is released, and both pistons 30, 31 move together toward the first water pressure chamber 28 side. The linear motion of the pistons 30 and 31 is converted into the rotational motion of the valve stem 3 by the aforementioned conversion mechanism, the valve body 2 rotates integrally with the valve stem 3 to open the pipes A and B, and the sprinkler equipment is pre-actuated. It becomes a state. Thereafter, water discharge is started by opening the sprinkler head as in the first embodiment.

  In the second embodiment, since the spring as in the first embodiment is not used for the hydraulic cylinder 26, compared to the first embodiment, the spring is not affected by the deterioration of the elastic force of the spring or the fatigue, and thus for a long time. It can be used stably.

  In the above-described embodiments, the butterfly valve type sprinkler equipment valve has been described. However, the present invention can also be applied to a gate valve type sprinkler equipment valve that opens a pipe by sliding a valve body. In that case, the conversion mechanism of each embodiment becomes unnecessary, and the linear motion of the piston of the hydraulic cylinder may be directly transmitted to the valve body.

DESCRIPTION OF SYMBOLS 1 Valve box 2 Valve body 3 Valve rod 4, 25 Driving device 5, 26 Hydraulic cylinder 7, 27 Solenoid valve 11, 28, 29 Hydraulic chamber 12, 30, 31 Piston 13 Spring 14 Rotating shaft 15 Arm 32 Rod A Primary side piping B Secondary side piping

Claims (2)

  A sprinkler equipment valve comprising: a valve body that opens and closes a pipe of a sprinkler facility; and a drive device that opens the valve body in response to a fire detection signal from a fire detector, wherein the drive device is a primary side of the pipe The piston of the hydraulic cylinder to which the water pressure is introduced is connected to the valve body, and when the fire detection signal is received, by switching the water pressure introduction state of the hydraulic cylinder, the piston is operated and the valve body is A sprinkler equipment valve characterized by being driven to open.   The valve body is a butterfly valve type that rotates integrally with the valve stem to open and close the pipe, and converts the linear motion of the piston into the rotational motion of the valve stem between the valve stem and the hydraulic cylinder. The sprinkler equipment valve according to claim 1, further comprising a conversion mechanism.

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