JP2009207630A - Sprinkler head and wet-type, pre-actuating type sprinkler fire extinguishing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep a sprinkler head normal over a lengthy period. <P>SOLUTION: In the sprinkler head 4 equipped with a body 8 of the head which is connected to a secondary side pipe arrangement 2 and includes an outlet 6, a valve body 14 for closing the outlet, and thermo-sensitive decomposing parts for supporting the valve body, a water pressure in the pipe arrangement which is applied to the valve body is low in case of monitoring, and the sprinkler head is in a monitoring position in which a part of or the entire sprinkler head is housed in a protected zone. In case of a fire, a water pressure in the pipe arrangement which is applied to the valve body is high, and the sprinkler head is in a fire detecting position in which the almost entire thermo-sensitive decomposing parts are exposed in the protected zone. Then, when the thermo-sensitive decomposing parts are decomposed by the heat of the fire, the sprinkler head starts watering. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sprinkler head and a wet pre-actuated sprinkler fire extinguishing equipment used for extinguishing a building or the like.

  A conventional wet sprinkler head includes a head body having a water outlet, a valve body that closes the water outlet, and a thermal decomposition component that supports the valve body. The thermal decomposition component is caused by the heat of a fire. When decomposed, the water outlet is opened and water discharge is started (for example, see Patent Document 1).

JP-A-11-206907

  In the conventional example, the position of the sprinkler head at the time of non-fire and at the time of fire is exposed from the ceiling surface. Water was being discharged. Also, dust may adhere to the heat sensitive part and the detection sensitivity may deteriorate. Furthermore, it is not preferable in terms of aesthetics.

  In view of the above circumstances, an object of the present invention is to enable a sprinkler head to maintain a normal state for a long time.

  The sprinkler head of the present invention is a sprinkler head that is connected to a pipe and has a water discharge port, a valve body that closes the water discharge port, and a thermal decomposition component that supports the valve body. The water pressure in the pipe over the valve body is low, and the sprinkler head is in a monitoring position where a part or all of the sprinkler head is stored in a protective area, and in the event of a fire, the water pressure in the pipe over the valve body is high, The sprinkler head is a fire detection position where almost all of the thermal decomposition parts are exposed to a protection area, and then starts water discharge when the thermal decomposition parts are decomposed by the heat of the fire. .

  The sprinkler head according to the present invention includes valve body holding means for maintaining the valve body in a closed state even when the thermal decomposition component is damaged when the water pressure in the pipe applied to the valve body is low. It is a feature.

  In the sprinkler head of the present invention, the inner cylinder connected to the head main body, the outer cylinder in which the inner cylinder is slidable along the inner surface, and the inner cylinder and the outer cylinder are separated from each other. And an expansion / contraction means comprising a spring component for urging the spring.

A sprinkler fire extinguishing system according to the present invention includes a secondary side pipe connected to the sprinkler head according to any one of claims 1 to 3 and filled with water in a non-fire state, and a fire detector installed in the same protection area as the sprinkler head. And a wet pre-actuated sprinkler fire extinguishing system provided at the base end of the secondary side pipe and closed at the time of non-fire and opened at the time of fire. The water pressure in the secondary side pipe is kept low,
In the event of a fire, the water pressure in the secondary side pipe increases due to the operation of the fire sensor, and water discharge is started both by the operation of the fire sensor and the operation of the sprinkler head.

  Since the present invention is configured as described above, in the state of monitoring the sprinkler head, it becomes a monitoring position in which a part or all of the sprinkler head is stored in the protection area. Therefore, the thermal decomposition component can be prevented from receiving an external force, and contamination due to dust accumulation can be prevented. Further, since the sprinkler head is not visible at the time of monitoring, it is preferable from an aesthetic point of view.

A first embodiment of the present invention will be described with reference to FIGS.
A plurality of sprinkler heads 4 are arranged at intervals in the secondary pipe 2 of the wet pre-actuated sprinkler fire extinguishing equipment 1. The sprinkler head 4 is a frame-type sprinkler head, for example, and includes a head body 8 having a water outlet 6. The water discharge port 6 is provided to face the deflector 10. The deflector 10 and the head body 8 are connected via a frame 12.

  The water discharge port 6 is closed by a valve body 14, which is supported by a glass valve 18. The glass bulb 18 is a heat-sensitive decomposition part, and when it receives heat from a fire, the filled alcohol expands and breaks.

  The front end portion of the glass bulb 18 is mounted in the insertion hole 14 a of the valve body 14, and the rear end portion is supported by the support member 20. The support member 20 is screwed to the lower end portion of the frame 12, and the pressure applied to the glass bulb 18 can be adjusted by rotating the support member 20.

  The head body 8 is slidably fitted to a connecting tube 3 that is continuous with the tip of the secondary pipe 2. A fixed flange 9 is provided at the front end portion of the head main body 8, and a sliding flange 11 is provided at the rear end portion (on the frame 12 side). A coil spring 13 is mounted which insulates the two 9 and 11 from each other.

  The lower end of the connecting cylinder 3 is in contact with the sliding flange 11 to restrict the movement of the flange 11. The lower end portion of the sprinkler head 4 is positioned flush with or above the ceiling surface 19, that is, the sprinkler head 4 is stored behind the ceiling when there is no fire.

  A plurality of fire detectors 31 are provided in the same protection area as the sprinkler head 4, and the fire detectors 31 transmit a fire signal to the control panel 33 when a fire is detected.

  An open valve 35 is provided at the base end of the secondary side pipe 2. The release valve 35 is opened by an opening command of the control panel 33 when the control panel 33 receives a fire signal from the fire detector 31.

  A primary side pipe 37 is connected to the inlet side of the release valve 35, and a water source water tank 39 is connected to the primary side pipe 37 via a pump 40. A pressure air layer 42 is connected to the primary side pipe 37, and a pressure signal of a pressure switch 41 of the pressure air layer 42 is input to a pump control panel 45, and the pump control panel 45 receives the pressure signal. The activation of the pump 40 is controlled based on the above.

Next, the operation of the first embodiment will be described.
When the head is abnormal:
First, a state where no fire has occurred, that is, a case where a thermal decomposition component is damaged at the time of non-fire (head abnormal state) will be described.
At the time of non-fire, the release valve 35 is closed, and the pressure in the secondary side pipe 2 is extremely lower than the pressure in the primary side pipe 37. Therefore, the valve body 14 supported by the glass bulb 18 maintains a closed state.

  If the glass bulb 18 is damaged due to an unexpected accident, for example, an external force, the valve body 14 cannot be supported by the glass bulb 18, so the valve body 14 falls and the water outlet 6 is opened. The Therefore, although water discharge is started, since the open valve 35 is closed as described above, only the fire-extinguishing water in the secondary side pipe 2 is discharged. At this time, the sprinkler head 4 maintains its current state without being displaced.

When the head is normal:
The case where the thermal decomposition component is not damaged during the non-fire (normal head state) will be described.
At the time of non-fire, the release valve 35 is closed, the water pressure in the secondary side pipe 2 is maintained lower than the water pressure at the time of water discharge, and the sprinkler head 4 is stored behind the ceiling 19. The state of the sprinkler head 4 at this time is referred to as a “monitoring state”, and the position is referred to as a “monitoring position”.

When a fire occurs and the fire detector 31 detects the fire, a fire signal is transmitted to the control panel 33, and the control panel 33 opens the release valve 35 based on the fire signal.
The fire-extinguishing water w in the primary side pipe 37 flows into the secondary side pipe 2 by opening the release valve 35. Therefore, since the pressure applied to the valve body 14 increases, the head body 8 slides downward against the spring force of the spring 13.

  Then, as shown in FIG. 2, the glass bulb 18 is exposed from the ceiling surface 19, and the sprinkler head 4 is located in the hot air flow passage. The state of the sprinkler head 4 at this time is called a “fire state”, and the position of the sprinkler head 4 is called a “fire detection position”. At this stage, since the valve body 14 is supported by the glass valve 18, the valve is maintained closed.

  When the alcohol in the glass bulb 18 expands due to the hot air current of the fire, the glass bulb 18 is destroyed. If it does so, since the valve body 14 will be pushed by the fire extinguishing water w in the said secondary side piping 2, and will fall, the water discharge port 6 will open and water discharge will be started. The fire-extinguishing water w discharged from the water outlet 6 collides with the deflector 10 and is scattered in the protected area while changing the flow direction.

  When water discharge is stopped after the fire is extinguished, the head main body 8 returns to the original position by the force of the spring 13 and becomes the monitoring position. According to this embodiment, when the control panel 33 receives only the fire signal from the fire detector 31, the control valve 33 opens the release valve 35, so that the sprinkler head 4 can start water discharge simultaneously with the operation.

A second embodiment of the present invention will be described with reference to FIGS. 5 to 9. The same reference numerals as those in FIGS. 1 to 4 have the same names and functions.
The differences between the first embodiment and the present embodiment are as follows.
(1) The sprinkler head is connected to the secondary pipe through a hydraulic expansion joint.
(2) The sprinkler head has a valve body holding means.

First, (1) will be described.
The hydraulic expansion joint 50 includes a cylindrical joint body 51A, a connection port 53A for screwing the joint body 51A to the secondary side pipe 2, and a piston cylinder 55A that is slidably inserted into the joint body 51A. And.

A fixed flange 9A is provided on the upper end of the piston cylinder 55A, a sliding flange 11A is slidably fitted on the outer side of the lower end thereof, and a screw part 56A is provided on the inner side thereof. The head body 8 of the sprinkler head 4 is screwed to the screw portion 56A. A coil spring 13 is inserted between the flanges 9A and 11A.
Here, the hydraulic expansion joint refers to a joint that expands and contracts due to a change in water pressure in the joint body 51A.

Next, (2) will be described.
That is, as shown in FIG. 6, the valve body 4 is supported by the glass valve 18 via the valve body holding means 15.
Here, the valve body holding means 15 is provided on the upstream side or downstream side of the valve body 14, and when the thermal decomposition component is disassembled, the pressure in the pipe 2 applied to the valve body 14 is a fire. When the pressure is lower than the pressure at the time of water discharge, the valve body 14 keeps the water outlet 6 in a closed state.

  The valve body holding means 15 used in this embodiment forms a columnar body, is fixed integrally with the valve body 14, and has a mounting portion 24 for the spring component 22 and a groove portion 28 for the locking component 26 at the periphery. For example, two spherical locking parts 26 and the valve body 14 are fitted to the support 16, the groove 28, and a recess 30 provided at a position facing the groove 28 in the frame 12. And an O-ring 9 provided so as to be slidable while maintaining a closed state in the water discharge port 6.

  The support column 16 is fixed to the frame 12 via the locking part 26, but the support column 16 does not move at the magnitude of the pressure in the secondary side pipe 2 at the time of non-fire. 12 is fixed. Moreover, the pressure in the secondary side piping 2 maintained in a closed state at the time of non-fire can be adjusted by the contact condition between the O-ring 9 and the water discharge port 6.

Next, the operation of the second embodiment will be described.
When the head is abnormal:
First, a state where no fire has occurred, that is, a case where the thermal decomposition component is unexpectedly damaged at the time of a non-fire, for example, a case where the head is damaged by an external force (head abnormal state) will be described.
At the time of non-fire, the release valve 35 is closed, and the pressure in the secondary side pipe 2 is extremely lower than the pressure in the primary side pipe 37. Therefore, the valve body 14 supported by the glass valve 18 and the valve body holding means 15 maintains a closed state. At this time, the hydraulic expansion joint 50 maintains a contracted state as shown in FIG.

When an external force is applied to the sprinkler head 4 and the glass bulb 18 is damaged, the valve body 14 cannot obtain support by the glass bulb 18.
However, since the valve body 14 is held by the valve body holding means 15 as shown in FIG. 7, the valve closed state can be maintained.

  At this time, the open valve 35 is closed, and the fire-extinguishing water w in the primary side pipe 37 does not flow into the secondary side pipe 2, so that the pressure in the secondary side pipe 2 does not increase. Since the hydraulic expansion joint 50 maintains the contracted state, the sprinkler head 4 remains in the monitoring position. That is, in the second embodiment, even if the glass bulb 18 is damaged by an external force, the fire extinguishing water in the secondary side pipe 2 is not discharged.

Next, a case where a fire occurs in the head abnormal state will be described.
When a fire has occurred, that is, in the event of a fire, when the fire detector 31 detects a fire, a fire signal is transmitted to the control panel 33, and the control panel 33 opens the release valve 35 based on the fire signal.

By opening the release valve 35, the fire extinguishing water w in the primary side pipe 37 flows into the secondary side pipe 2, and the pressure in the secondary side pipe 2 rises rapidly.
Then, the piston cylinder 55A of the hydraulic expansion joint 50 slides against the spring force of the spring 13 and extends downward. As shown in FIGS. 8 and 9, the valve body 14 of the sprinkler head 4 is Since it moves and falls in the direction of water discharge, the water discharge port 6 is opened and water discharge is started.

  In the state of FIG. 8, the locking component 26 is detached from the groove portion 28 of the column 16 by the sliding of the valve body 14. Further, the locking part 26 is guided inward by the top part 30a on the side of the concave part 30, and the spring part 22 is contracted upward.

  In the state of FIG. 9, the locking member 26 that has connected the frame 12 and the column 16 is detached from the groove 28 and the recess 30 and falls, so that the valve body 14 and the column 16 fall. Therefore, the water discharge port 6 is completely opened and water discharge is started.

When the head is normal:
The case where the thermal decomposition component is not damaged during the non-fire (normal head state) will be described.
When a fire occurs and the fire detector 31 detects the fire, a fire signal is transmitted to the control panel 33, and the control panel 33 opens the release valve 35 based on the fire signal.

  Since the extinguishing valve 35 is opened, the fire extinguishing water w in the primary side pipe 37 flows into the secondary side pipe 2 and increases the pressing force of the valve body 14, so that the piston cylinder 55A of the hydraulic expansion joint 50 slides downward. The sprinkler head 4 is moved down to the fire detection position.

  However, at this stage, since the valve body 14 is supported by the valve body holding means 15 and the glass valve 18, the valve closed state is maintained.

  When the alcohol in the glass bulb 18 expands due to the hot air current of the fire, the glass bulb 18 is destroyed. Then, the valve body 14 and the valve body holding means 15 are pushed and dropped by the fire-extinguishing water w whose pressure is rising in the secondary pipe 2, so that the water discharge port 6 is opened and water discharge is started. The fire-extinguishing water w discharged from the water outlet 6 collides with the deflector 10 and is scattered in the protected area while changing the flow direction.

A third embodiment of the present invention will be described with reference to FIG. 10. The same reference numerals as those in FIGS. 1 to 4 have the same names and functions.
The difference between this example and the second embodiment is that a flash type head is used instead of the frame type head as the sprinkler head.
The flash-type sprinkler head 4B includes a cylindrical frame 12B and a link portion 57 that forms a thermal decomposition component.

  The frame 12 </ b> B includes a flange portion 53 and is screwed to the lower portion of the head body 8. The link portion 57 includes leg portions 51 inclined in the disassembling direction, and includes a pair of arms 55 and 56 that are engaged with the flange portion 53 of the frame 12B and support the valve body 14 and the valve body holding means 15. I have.

  In FIG. 10, 59 is a deflector, 61 is an arm guide substrate, 63 is a pair of guide pieces provided on both sides of the substrate 61 in the longitudinal direction, and 65 is supported by a first arm 55 and a second arm 56. The protrusion of the pressing member 67 that supports the support column 16 is in contact with the central recess of the balancer 65. Reference numeral 69 denotes a link pressing plate, 70 denotes a bowl-shaped heat receiving plate, and 72 denotes an arm support plate.

  The heat receiving plate 70 is sandwiched between the first cylinder 74 and the second cylinder 75. The first cylinder 74 stores solder 77 as a heat sensitive body, and a piston 79 is overlaid on the upper surface of the solder 77. The piston 79 is pressed by a piston rod 80. On the outer peripheral surface of the first cylinder 74, two horizontal heat receiving plates 82 and 83 are disposed at intervals in the axial direction.

  In this embodiment, when the respective heat receiving plates 70, 82, 83 are heated by the hot air flow of the fire, the heat is transmitted to the solder 77. When the heat transmitted to the solder 77 reaches a predetermined temperature (melting temperature), the solder 77 is melted, the arm 55 is repelled, the link portion 57 is disassembled, and the valve body 14 and the valve body support means 15 are dropped. To do. Therefore, since the water discharge port 6 is opened, water discharge is started.

It is a longitudinal cross-sectional view of the sprinkler head which shows 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the changed state of FIG. It is a longitudinal cross-sectional view which shows the changed state of FIG. It is a lineblock diagram of the sprinkler fire extinguishing equipment which shows a 1st embodiment of the present invention. It is a longitudinal cross-sectional view of the hydraulic expansion joint which shows 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the sprinkler head which shows 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the changed state of FIG. It is a longitudinal cross-sectional view which shows the changed state of FIG. It is a longitudinal cross-sectional view which shows the changed state of FIG. It is a longitudinal cross-sectional view of the sprinkler head which shows 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wet pre-operation type sprinkler fire extinguishing equipment 2 Secondary side piping 4 Sprinkler head 6 Water outlet 8 Head main body 12 Frame 14 Valve body 15 Valve body holding means 16 Post 18 Glass valve 26 Locking part 35 Release valve

Claims (4)

In a sprinkler head that is connected to a pipe and has a water discharge port, a valve body that closes the water discharge port, and a thermal decomposition component that supports the valve body,
At the time of monitoring, the water pressure in the pipe applied to the valve body is low, and the sprinkler head is in a monitoring position where a part or all of it is stored in a protective area,
In the event of a fire, the water pressure in the pipe over the valve body is high, and the sprinkler head is at a fire detection position where almost all of the thermal decomposition parts are exposed in a protective area,
Thereafter, water discharge is started when the thermal decomposition component is decomposed by the heat of a fire. 2. The valve body holding means for maintaining the valve body in a closed state even when the thermal decomposition component is damaged when the water pressure in the pipe applied to the valve body is low. Sprinkler head.   An inner cylinder connected to the head body, an outer cylinder provided so that the inner cylinder is slidable along the inner surface, and a spring component that urges the inner cylinder and the outer cylinder to be separated from each other. The sprinkler head according to claim 1, further comprising: expansion / contraction means comprising: A sprinkler head according to any one of claims 1 to 3 is connected, and a secondary side pipe filled with water in a non-fire, a fire detector installed in the same protection area as the sprinkler head, and the secondary side pipe In a wet type pre-actuated sprinkler fire extinguishing equipment, provided at the base end, which is closed at the time of non-fire and opened at the time of fire,
During non-fire, the water pressure in the secondary pipe is kept low,
In the event of a fire, the water pressure in the secondary side pipe increases due to the operation of the fire detector, and water discharge is started both in the operation of the fire detector and in the operation of the sprinkler head. Pre-actuated sprinkler fire extinguishing equipment.

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