JP2010213825A - Fire extinguishing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the deterioration in a fire extinguishing performance even at a time of using water supply by securing a water pressure necessary when sprinkler heads are activated. <P>SOLUTION: This fire extinguishing system is mounted with closed sprinkler heads 18 activated by receiving a thermal current by fire, on a pipe for feeding the water supply and includes cutoff devices 20 adapted to cut off the water supply to watering sections other than the sprinkler heads 18 when a water supply pressure of the pipe falls to a predetermined pressure or less. The cutoff devices 20 are provided at every branch section of the pipe with respect to the watering sections, however, when the pipe to the sprinkler heads 18 and the pipe to the watering sections other than the sprinkler heads are separately laid, the cutoff device may be provided at the branch section of the pipe to the watering sections. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a fire extinguishing facility in which a closed sprinkler head that operates by receiving a hot air current from a fire is installed in a pipe that supplies a water supply.

  Conventionally, in general houses, apartment houses, group homes, and the like, there is known a fire extinguishing facility in which a closed sprinkler head is connected to the same pipe as the water supply and the fire is extinguished using the water supply in the event of a fire.

Here, the water pressure to the sprinkler head of a general house is required to be, for example, 0.05 MPa, and sufficient fire extinguishing performance can be obtained at the time of fire by ensuring a water supply pressure exceeding 0.05 MPa from the water supply.

JP-A-8-24360

  However, in such conventional fire extinguishing equipment, since the water supply is used in daily life, for example, when a plurality of sprinkler heads are operated when using the water supply such as water supply to a bathtub, the water supply pressure to the sprinkler heads May drop below the specified pressure, making it impossible to ensure fire extinguishing performance.

An object of the present invention is to provide a fire extinguishing equipment that secures a necessary water pressure when a sprinkler head is operated and suppresses a reduction in fire extinguishing performance even when a water supply is used.

The present invention is a fire extinguishing facility in which a closed sprinkler head that operates by receiving a hot air current from a fire is installed in a pipe that supplies water supply.
The present invention is characterized in that a shut-off device is provided that shuts off the water supply to the watering section other than the sprinkler head when the water supply pressure of the pipe drops below a predetermined pressure.

  Here, a shut-off device is provided for each branching portion of the piping with respect to the watering portion. Further, in the case where piping is divided into piping for the sprinkler head and piping for the water sprinkler other than the sprinkler head, the blocking device is provided at a branching portion of the piping for the water sprinkler.

  The shut-off device is closed so as to completely shut off the flow path when the water supply pressure of the pipe drops below a predetermined pressure.

  The shut-off device may be closed with the flow passage partially opened when the water supply pressure of the pipe drops below a predetermined pressure.

A shut-off device is installed in the faucet. Further, the shut-off device may be fixed by screwing into the outlet screw hole of the faucet.

  According to the present invention, when a fire occurs during use of the water supply and the sprinkler head operates and the water supply pressure drops below a predetermined pressure, the shut-off device valve is closed and water is supplied to the watering section other than the sprinkler head. The water supply by the water supply is concentrated on the operating sprinkler head, and a sufficient water supply pressure for the sprinkler head can be secured to suppress the deterioration of the fire extinguishing performance.

  In addition, if the piping for the sprinkler head of the general equipment and the piping for the sprinkler head are separated, it is only necessary to install a shut-off device at the branch of the piping for the sprinkler head of the general equipment, reducing the equipment cost by installing fewer shut-off devices. Can be reduced.

Further, by opening a part without completely shutting off the flow path by closing the shut-off device, it is possible to use a minimum amount of water supply by a watering part of a general facility.

Explanatory drawing which showed embodiment of the fire extinguishing equipment by this invention Sectional drawing which showed embodiment of the interruption | blocking apparatus provided in FIG. Sectional drawing which showed other embodiment of the interruption | blocking apparatus provided in FIG. Sectional drawing which showed other embodiment of the interruption | blocking apparatus provided in FIG. Explanatory drawing which showed other embodiment of the fire extinguishing equipment by this invention Sectional drawing which showed other embodiment of the interruption | blocking apparatus used with the fire-extinguishing equipment of this invention which has opened some flow paths by valve closing Explanatory drawing which showed other embodiment of the interruption | blocking apparatus incorporated in a faucet Explanatory drawing which showed other embodiment of the interruption | blocking apparatus connected to a faucet

  FIG. 1 is an explanatory view showing an embodiment of a fire extinguishing facility according to the present invention. In FIG. 1, for example, a water supply pipe 10 drawn into a general house is branched into a general equipment pipe 10a and a fire extinguishing equipment pipe 10b. A faucet 16 for the hand-washing 12 and the bathtub 15 is connected to the general equipment pipe 10a, and a pipe is connected to the water supply tank for the toilet 14.

  For example, a closed type sprinkler head 18 is connected to the fire extinguishing equipment pipe 10b separately for each room. The closed-type sprinkler head 18 has a head opening closed by a valve member held by a heat-sensitive mechanism. When the heat-sensitive function reaches a predetermined temperature in response to a thermal airflow caused by a fire, the valve member is detached by thermal decomposition. Open the head opening and sprinkle the tap water.

  In the embodiment of the present invention for such a fire extinguishing system using water supply, a shutoff device 20 is provided in each of the pipes from the general equipment pipe 10a to the faucet 16 serving as a watering part of the general water supply equipment and the tank of the toilet 14. ing. The shut-off device 20 shuts off the water supply to the water sprinkling part such as the faucet 16 and the toilet tank when the water supply pressure of the pipe drops below a predetermined pressure.

  Here, the water pressure to the sprinkler head 18 of a general house is required to be 0.05 MPa, for example, and when the sprinkler head 18 and the watering part of the general water supply facility, for example, the faucet 16 of the bathtub 15 are opened, the water pressure is 0.05 MPa. Reduced to: Therefore, when the water pressure drops to a predetermined pressure of 0.05 MPa or less, for example, 0.03 MPa or less, the shut-off device 20 closes the valve, shuts off the water supply to the general water supply equipment, and operates with the fire extinguishing equipment pipe 10b. The water supply by the water supply is concentrated to 18, and the planned fire extinguishing performance is secured by suppressing the decrease in water pressure.

  FIG. 2 is a cross-sectional view showing an embodiment of a shut-off device used in the fire extinguishing equipment of FIG. In FIG. 2, the blocking device 20 forms an inflow port 24 having a screw portion 24 a on one side of a main body 22 and an outflow port 26 having a screw hole portion 26 a on the opposite side, and a flow path 30 formed therebetween. A ball valve 34 is arranged with respect to the secondary valve seat 32, and the ball valve 34 is urged in the closing direction by a coil spring 36 supported by the arrangement of the holder 28. A plurality of flow paths 38 are formed in the holder 28 in the axial direction.

  When the water supply pressure of the ball valve 34 from the inlet 24 exceeds, for example, 0.03 MPa set by the spring force of the coil spring 36, the ball valve 34 compresses the coil spring 36 and opens the flow path 30. When the water supply pressure is reduced to, for example, 0.03 MPa or less by the operation of the sprinkler head 18, the ball valve 34 is pushed by the force of the coil spring 36 to close the flow path 30.

  FIG. 3 is a cross-sectional view showing another embodiment of a shut-off device used in the fire extinguishing equipment of FIG. In FIG. 3, the blocking device 20 forms an inflow port 44 having a screw portion 44a on one side of a main body 42 and an outflow port 46 having a screw hole portion 46a on the opposite side, and a flow path 50 formed therebetween. A spool valve 54 is arranged with respect to the secondary side valve seat 52.

  In the spool valve 54, a rod 55 is integrally formed on the rear side, the rod 55 is slidably supported through the holder 48, and a stopper 56 for retaining is formed at the rear end of the rod 55. The spool valve 54 is urged in the closing direction by a coil spring 58 supported by the arrangement of the holder 48. A plurality of flow paths 60 are formed in the holder 48 in the axial direction.

  When the supply pressure of the spool valve 54 from the inflow port 44 exceeds, for example, 0.03 MPa set by the spring force of the coil spring 58, the spool valve 54 compresses the coil spring 58 and opens the flow path 50. When the water supply pressure is lowered to, for example, 0.03 MPa or less by the operation of the sprinkler head 18, the spool valve 54 is pushed by the force of the coil spring 58 to close the flow path 50.

  FIG. 4 is a cross-sectional view showing another embodiment of the shut-off device used in the fire extinguishing equipment of FIG. 1. In this embodiment, the shut-off device is structured to be incorporated in the connecting portion of the pipe. It is characterized by.

  In FIG. 4, the shut-off device 20 is incorporated in the joint portion of the primary pipe 62 and the secondary pipe 63. That is, the blocking device 20 forms a flow channel 66 in the flange portion of the main body 64, and generates a retainer portion 74 by bending the tip of the cylindrical portion behind the flow channel 66 inward, and is disposed inside the retainer portion 74. The valve element 70 is pressed against the valve seat seal 68 disposed in the ring groove at the opening of the flow path 66 by the coil spring 72 and closed.

  When the supply pressure of the valve body 70 from the inlet 44 exceeds, for example, 0.03 MPa set by the spring force of the coil spring 72, the valve body 70 compresses the coil spring 72 and opens the flow path 66. When the water supply pressure is reduced to, for example, 0.03 MPa or less by the operation of the sprinkler head 18, the valve body 70 is pushed by the force of the coil spring 72 to close the flow path 66.

  In the shut-off device 20 according to the embodiment of FIG. 4, the structure can be simplified and the size can be reduced because it can be built in the joint portion of the pipe.

  FIG. 5 is an explanatory view showing another embodiment of the fire-extinguishing equipment according to the present invention, and is characterized in that a shut-off device is provided at a branch portion of the piping for general equipment.

  In FIG. 5, since the water supply pipe 10 is divided into two systems, the general equipment pipe 10a and the fire extinguishing equipment pipe 10b, in such a case, one shutoff device is provided at the branch portion of the general equipment pipe 10a. 20 is provided.

  The shut-off device 20 is the same as that of the embodiment of FIG. 1, and when the water supply pressure of the pipe drops below a predetermined pressure, the water supply to the general equipment pipe 10a is shut off, and the water supply to the watering part such as the faucet 16 and the toilet tank is stopped. To do.

  That is, when the water pressure exceeds 0.03 MPa, the shut-off device 20 opens the valve and supplies tap water to the general facility, but the sprinkler head 18 and the tap 16 of the general tap facility, for example, the bathtub 15 are open. When the water pressure drops below 0.03 MPa, the shutoff device 20 closes the valve, shuts off the water supply to the general equipment piping 10a, concentrates the water supply by the water supply to the fire extinguishing equipment piping 10b, and operates the sprinkler head 18 The planned fire extinguishing performance is secured by suppressing the decrease in water pressure against the water.

  FIG. 6 is a cross-sectional view showing another embodiment of a shut-off device used in the fire extinguishing equipment of the present invention. In this embodiment, even if the valve is closed, the flow path is not completely shut off, It is characterized in that the minimum required water supply to the watering part of general equipment is ensured with a part of the road opened.

  6, the structure of the shut-off device 20 of this embodiment is basically the same as that of the embodiment of FIG. 2, but further, the ball valve 34 is opened and closed in parallel with the flow path 30 closed by the ball valve 34. A bypass flow path 76 that constantly supplies tap water without being affected is provided.

  By providing the bypass channel 76 in this way, the sprinkler head 18 and the faucet 16 of, for example, the bathtub 15 of the general water supply facility are opened in the arrangement state of the shut-off device 20 as shown in FIG. 1 or FIG. When the shut-off device 20 closes the valve when the pressure is reduced to 0.03 MPa or less, water supply by the general pipe 10a is performed through the bypass flow path 76, and the necessary minimum water supply is ensured for the water spray portion of the general equipment. Can do.

  FIG. 7 is a cross-sectional view showing another embodiment of the shut-off device used in the fire extinguishing equipment of the present invention. In this embodiment, the shut-off device is built in the faucet.

  In FIG. 7, a faucet 78 has a spindle 82 screwed into a main body 80 by a screw portion 82 b, a triangular packing 86 is arranged on the upper part of the spindle 82 by a packing presser 84, and a handle 85 is attached to the tip of the spindle 82. ing.

  A shaft portion 82a is formed at the lower end of the spindle 82, passes through a valve hole 82b formed in the partition wall 80a, and the valve element 90 can be slid freely through the top packing 88 above the valve hole 82b. The coil spring 90 is interposed between the valve body 92 and the lower end of the screw portion 82, and the valve body 90 is biased in the direction of closing the valve hole 80b.

  The shut-off device 20 is configured by a valve body 90 that is slidably fitted to the shaft portion 82a of the spindle 82 and a coil spring 92 that biases the valve body 90 in the closing direction.

  When the sprinkler head is closed, when the handle 82 of the faucet 78 is turned to move the spindle 82 to the open side (upward), the pressing of the valve element 90 to the closed position by the spindle 82 is released, and the valve element 90 is It will be in the free state which received the force of only the coil spring 92. FIG.

  Here, when the valve body 90 is in a free state, the valve body 90 tends to be pressed to the closed position by the force of the coil spring 92, but the force due to the water pressure applied to the top packing 88 overcomes the spring force of the coil spring 92, and the water pressure The valve body 90 is pushed up and pushed up, the channel is opened and tap water can be supplied from the outlet 82c.

  On the other hand, when the sprinkler head of the fire extinguishing equipment is operated by receiving heat from the fire and the handle 85 of the faucet 78 is turned to discharge water, the water pressure in the pipe is, for example, 0.05 MPa or less due to water sprinkling from the sprinkler head. When the handle 85 is turned to discharge water when the pressure is lower than a predetermined pressure, for example, 0.03 MPa or lower, the spindle 82 moves upward and the valve element 90 becomes free. However, the force applied to the valve body 90 via the top packing 88 does not exceed the force of the coil spring 92, and the valve body 90 is pushed by the coil spring 92 to close the valve hole 82b, and water is not supplied even if the faucet 78 is opened. The water pressure drop due to the use of the faucet 78 during operation of the sprinkler head is suppressed.

  In order to incorporate the shut-off device 20 into the faucet 78, the spindle of the normal faucet 28 is taken out by removing the packing retainer 84, and is replaced with a spindle 82 in which the shut-off device 20 comprising the valve body 90 and the coil spring 92 is assembled. It ’s fine.

  FIG. 8 is a cross-sectional view showing another embodiment of the shut-off device used in the fire extinguishing equipment of the present invention. In this embodiment, the shut-off device is connected to the water outlet of the faucet. .

  In FIG. 8, a screw hole 94 is formed inside the outlet of the faucet 78, and the shut-off device 20 is screwed and fixed therein. The shut-off device 20 has the same structure as that of the embodiment of FIG. 2, for example. The inflow port 24 having a threaded portion is formed on one side of the main body 22 and can be screwed into and fixed to the screw hole 94 at the outlet of the faucet 78.

  A coil spring in which an outlet 26 is formed on the opposite side of the main body 22, a ball valve 34 is disposed with respect to a valve seat 32 on the secondary side of the flow path 30 formed therebetween, and the ball valve 34 is supported by the arrangement of the holder 28. 36 is biased in the closing direction. A plurality of flow paths 38 are formed in the holder 28 in the axial direction.

  When the water pressure from the inlet port 24 when the faucet 78 is opened exceeds, for example, 0.03 MPa set by the spring force of the coil spring 36, the ball valve 34 compresses the coil spring 36 and passes through the flow path 30. Can be opened and drained.

  On the other hand, when the water supply pressure is lowered to, for example, 0.03 MPa or less by the operation of the sprinkler head 18, the force applied to the ball valve 34 by the water pressure from the inlet 24 when the faucet 78 is opened is less than the force of the coil spring 36. 34 is pushed by the force of the coil spring 36 to close the flow path 30, and suppresses a decrease in water pressure due to the use of the faucet 78 during operation of the sprinkler head.

  By connecting the shut-off device 20 to the screw hole at the faucet outlet in this way, it is easier to assemble the shut-off device 20 than when a shut-off device is provided in the middle of the pipe, and the work man-hours and costs for constructing a fire extinguishing facility are reduced. Can be achieved.

  In FIG. 8, the shutoff device 20 having the same structure as that in FIG. 2 is connected to the faucet 78, but the shutoff device 20 having the structure provided with the bypass channel 76 shown in FIG. 6 is connected to the faucet 78. In this case, even if the water pressure is lowered by the operation of the sprinkler head, the minimum required water supply can be ensured when the faucet 78 is opened.

  In addition, the blocking device 20 provided with the bypass flow path 74 that does not depend on opening and closing of the valve can be similarly applied to the embodiments of FIGS. 3 and 4 in addition to the embodiment of FIG. 6.

  Moreover, although said embodiment has taken as an example the case where the water supply piping 10 is divided and divided into two lines, general equipment piping 10a and fire extinguishing equipment piping 10b, the structure which connected the sprinkler head and the sprinkler head of general equipment to the same piping In this case, as shown in FIG. 1, a shutoff device 20 is provided in each of the pipes for the watering part of the general equipment.

The present invention includes appropriate modifications without impairing the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments. In consideration of a decrease in the water discharge pressure when a plurality of sprinkler heads are operated simultaneously, the water discharge pressure is 0.02. In some cases, the specified pressure may be set to MPa. In this case, the shut-off device may close the valve when the pressure drops to 0.01 MPa or less.

10: Water supply piping 10a: General equipment piping 10b: Fire extinguishing equipment piping 18: Sprinkler head 20: Shut-off device 22, 42: Main body 24, 44: Inlet 26, 46: Outlet 28, 48: Holder 30, 38, 50, 60, 66: flow path 32, 52: valve seat 34: ball valve 36, 58, 72: coil spring 54, 70: valve body 55: rod 56: stopper 62: primary pipe 64: secondary pipe 68: valve seat seal 74: Seal ring 76: Bypass flow path

Claims (7)

In a fire extinguishing system equipped with a closed sprinkler head that operates in response to a hot air current due to a fire in the pipe that supplies the water supply,
A fire extinguishing system comprising a shut-off device that shuts off water supply to a watering section other than the sprinkler head when the water supply pressure of the pipe drops below a predetermined pressure.
The fire-extinguishing equipment according to claim 1, wherein the shut-off device is provided for each branching portion of the pipe with respect to the watering part.
2. The fire extinguishing equipment according to claim 1, wherein when the pipe for the sprinkler head and the pipe for the water sprinkler other than the sprinkler head are separately provided, the shut-off device is provided at a branch portion of the pipe for the water sprinkler. Fire extinguishing equipment characterized by that.
The fire-extinguishing equipment according to claim 1, wherein the shut-off device is closed so as to completely shut off the flow path when the water supply pressure of the pipe drops below a predetermined pressure.
2. The fire extinguishing equipment according to claim 1, wherein the shut-off device closes with the flow passage partially opened when the water supply pressure of the pipe drops below a predetermined pressure.
2. The fire extinguishing apparatus according to claim 1, wherein the shut-off device is incorporated in a faucet.
  2. The fire extinguishing apparatus according to claim 1, wherein the shut-off device is screwed into an outlet screw hole of the faucet and fixed.

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