JP5183521B2 - Sprinkler fire extinguishing equipment and sprinkler head used in this sprinkler fire extinguishing equipment - Google Patents

Description

  The present invention relates to a sprinkler fire extinguishing equipment and a sprinkler head used in the sprinkler fire extinguishing equipment.

  As a conventional sprinkler head, for example, a head body having a water outlet inside, a cylindrical frame connected to the lower side of the head body, a valve body for sealing the water outlet, a thermal decomposition mechanism for supporting the valve body, etc. Have been proposed (see, for example, Patent Document 1). Such a sprinkler head is attached to a lower part of a falling pipe connected to a secondary pipe installed in a ceiling pocket (space behind the ceiling), for example.

Japanese Patent Laid-Open No. 7-231949 (paragraphs 0018 to 0022, FIG. 1)

Sprinkler fire extinguishing equipment includes dry sprinkler fire extinguishing equipment that does not fill pipes. Even in such a dry sprinkler fire extinguishing facility, when checking water leakage of the facility, the pipe is filled with water. After the inspection of the sprinkler fire extinguishing equipment, the water in the pipe is removed in the dry sprinkler fire extinguishing equipment.
However, in the conventional sprinkler fire extinguishing equipment using the sprinkler head, there is a problem that the water filled in the pipe remains in the falling pipe when the sprinkler fire extinguishing equipment is inspected, and the piping such as the falling pipe is corroded. there were.

  The present invention has been made in order to solve the above-described problems, and it is possible to remove water from a falling pipe after inspection of the sprinkler fire extinguishing equipment, and to suppress sprinkler fire extinguishing that can suppress corrosion of the pipe. It aims at obtaining the sprinkler head used for equipment and this sprinkler fire extinguishing equipment.

The sprinkler head according to the present invention is a sprinkler head used in a sprinkler fire extinguishing equipment in which a negative pressure pump is connected to a pipe to which the sprinkler head is connected, and the inside of the pipe is brought into a negative pressure state by the operation of the negative pressure pump. The sprinkler head includes a head body in which a water outlet is formed inside a cylindrical tube portion, a frame provided below the head body, a valve body that closes the water outlet, and a thermal decomposition that supports the valve body. A mechanism and a check valve mechanism for flowing air around the thermal decomposition mechanism toward the water discharge port side are provided.

  The check valve mechanism is provided on the valve body. The check valve mechanism is, for example, an inflow port formed in at least one of the lower part and the side part of the valve body, an outflow port formed in the upper part of the valve body, and a communication path that connects the outflow port and the inflow port. And a check valve provided therein.

The sprinkler fire extinguishing equipment according to the present invention is a sprinkler fire extinguishing equipment in which a negative pressure pump is connected to a pipe to which a sprinkler head is connected, and the inside of the pipe is brought into a negative pressure state by the operation of the negative pressure pump. The sprinkler head according to the above is provided .

  In the present invention, when the negative pressure pump connected to the pipe is moved to suck the water remaining in the falling pipe to which the head body is connected, the air in the protected area is sucked from the check valve mechanism to the water discharge port. Is done. For this reason, it is also possible to suck water in the falling pipe. Therefore, corrosion of piping can be suppressed.

  In addition, when a check valve mechanism is used for the valve body, in the event of a fire, if the air in the pipe to which the head body is connected is sucked with a negative pressure pump, the check valve will open and the hot air current in the protected area will be heat sensitive. It flows around the decomposition mechanism and flows to the outlet. Therefore, a highly sensitive sprinkler head and a sprinkler fire extinguishing equipment using the sprinkler head can be obtained.

It is a longitudinal cross-sectional schematic diagram of the sprinkler head which concerns on Embodiment 1 of this invention. It is a system block diagram of the sprinkler fire extinguishing equipment using the sprinkler head concerning Embodiment 1 of the present invention. It is a longitudinal cross-sectional schematic diagram of the sprinkler head which concerns on Embodiment 2 of this invention.

Embodiment 1 FIG.
FIG. 1 is a schematic longitudinal sectional view of a sprinkler head according to Embodiment 1 of the present invention. The sprinkler head 100 is composed of a head body 1, a frame 6, a valve body 11, a glass valve 15 that is a thermal decomposition mechanism, and the like.

  The head main body 1 has a substantially cylindrical shape, and a water discharge port 3 is provided through the center. A screw portion 4 connected to a pipe (rising pipe 301 shown in FIG. 2) is formed at the upper part of the head main body 1, and a cylindrical flange 5 is provided at the lower part of the head main body 1, for example.

A columnar frame 6 is provided below the head body 1. The frame 6 includes an arm portion 7 and a support portion 8. The arm portion 7 protrudes from the lower portion of the flange 5, and the lower end of the arm portion 7 is bent in a substantially horizontal direction after being inclined slightly inward. A substantially cylindrical support portion 8 is connected to the lower end of the arm portion 7. A female screw portion 9 is provided through the center portion of the support portion 8. A push screw 10 is screwed into the female screw portion 9, and a deflector 16 is provided below the support portion 8.
In the first embodiment, the head main body 1 and the frame 6 are integrally formed. However, the head main body 1 and the frame 6 may be separated.

  A valve body 11 is provided below the water outlet 3. The valve body 11 includes a substrate 12 and a head 13. The substantially cylindrical substrate 12 has an outer diameter slightly larger than the diameter of the water discharge port 3. A concave portion 12a into which the upper portion of the glass bulb 15 is inserted is formed in the central portion of the lower portion of the substrate 12. In addition, a substantially cylindrical head 13 having a diameter smaller than that of the substrate 12 is formed at the center of the upper portion of the substrate 12. In the state supported by the glass bulb 15, the head 13 is inserted into the water outlet 3, and the upper part of the substrate 12 closes the lower part of the water outlet 3 via the disc spring 14.

The valve body 11 is provided with a check valve mechanism 20. The check valve mechanism 20 includes an inlet 21, an outlet 22, a communication path 23, a ball 24 serving as a check valve, a spiral spring 25, a spring retainer 26, and the like. For example, the two inlets 21 are formed in the lower part of the valve body 11, and the outlet 22 is formed in the upper part of the valve body 11. The inlet 21 and the inlet are communicated with each other through a communication path 23. The communication passage 23 has an upper inner diameter that is tapered, and a tapered portion is formed at a position where the inner diameter changes. A ball 24 serving as a check valve is provided in the communication path 23. The ball 24 is urged by a spiral spring 25 provided between the ball 24 and the spring retainer 26. Accordingly, the ball 24 is in contact with the tapered portion of the communication path 23. The spring retainer 26 protrudes from the head 13 of the valve body 11, for example.
The inflow port 21 may be provided on the side portion of the valve body 11. Further, instead of the spiral spring 25, the upper portion of the ball 24 may be biased by, for example, a leaf spring.

  The glass bulb 15 has a substantially cylindrical shape with a sharpened tip, and is formed of, for example, a hard glass tube. The glass bulb 15 is filled with a liquid having a high coefficient of thermal expansion such as ether leaving small bubbles. The glass bulb 15 made of hard glass is given strength in the axial direction. The glass bulb 15 is provided between the valve body 11 and the push screw 10 and is applied with a certain pressing force directed upward. With such a configuration, the above-described valve body 11 closes the water discharge port 3.

(Sprinkler fire extinguishing equipment)
FIG. 2 is a system configuration diagram of a sprinkler fire extinguishing facility using the sprinkler head according to the first embodiment of the present invention. This sprinkler fire extinguishing equipment is a sprinkler fire extinguishing equipment using the sprinkler head 100, and is configured as follows.

  A plurality of sprinkler heads 100 are provided in the protection area 201. The protective area 201 is provided with a fire detector 202 that detects a fire that has occurred in the protective area 201.

  Each sprinkler head 100 is connected to a falling pipe 301. In addition, each of the falling pipes 301 is connected to the secondary side pipe 302. One end of the secondary side pipe 302 is connected to one end of the on-off valve 203. The other end of the on-off valve 203 is connected to a vacuum chamber 204 via a pipe 303, and a negative pressure pump (also referred to as a vacuum pump) 205 is connected to the vacuum chamber 204. A drainage pipe 320 is connected between the on-off valve 203 and the vacuum chamber 204. The other end of the secondary pipe 302 is connected to one end of the end test valve 206. A drain pipe 321 is connected to the other end of the terminal test valve 206.

  A flowing water detector 210 is also connected to the secondary side pipe 302 via a pipe 310. The flowing water detection device 210 is connected to the discharge port of the fire fighting pump 211 via a pipe 311. This fire extinguishing pump 211 has a water suction port connected to a pipe 312, and can suck out fire extinguishing water from the fire extinguishing water tank 212.

  The fire detector 202, the on-off valve 203, and the flowing water detection device 210 are connected to the control panel 220 by signal lines. The control panel 220 controls the opening / closing of the opening / closing valve 203 and the opening / closing valve 210a of the water flow detection device 210 according to the presence / absence of a fire signal from the fire detector 202, and starts and stops the negative pressure pump 205 and the fire pump 211. Control.

(Water leak check operation)
Next, a water leak inspection operation of such a sprinkler fire extinguishing facility will be described with reference to FIGS. 1 and 2.
With the on-off valve 203 and the end test valve 206 closed, the on-off valve 210a of the flowing water detection device 210 is opened, and the fire pump 211 is started. Thereby, the inside of the falling piping 301, the secondary side piping 302, and the piping 310 is filled with fire extinguishing water. In this state, check for water leaks from the sprinkler fire extinguishing equipment.

  After completion of the water leak inspection of the sprinkler fire extinguishing equipment, the on-off valve 210a of the water flow detector 210 is closed and the on-off valve 203 and the end test valve 206 are opened for draining work. In this state, the negative pressure pump 205 is activated. Thereby, the insides of the secondary side pipe 302, the pipe 303, and the pipe 310 are sucked by the negative pressure pump 205 and returned to the fire-extinguishing water tank 212 through the drain pipe 320. At this time, in the sprinkler fire extinguishing equipment using the conventional sprinkler head, the fire extinguishing water in the falling pipe 301 cannot be sucked (removed). For this reason, the inside of the falling pipe 301 may be corroded.

  However, in the sprinkler fire extinguishing equipment according to the first embodiment, the ball 24 serving as a check valve moves upward in the communication passage 23 by the suction force of the negative pressure pump 205. Thereby, the inflow port 21 and the outflow port 22 communicate with each other, and the air in the protection area 201 is sucked into the falling pipe 301 through the water outlet 3. For this reason, the fire extinguishing water in the falling piping 301 can also be sucked (removed), and corrosion in the falling piping 301 can be suppressed.

  Note that, during the water leak inspection operation, the inside of the falling pipe 301, the secondary pipe 302, the pipe 303, and the pipe 310 is in a negative pressure state. Further, the pipe 311 is in a state filled with the fire extinguishing water stored in the fire extinguishing water tank 212. In this state, when the on-off valve 203 is closed and the negative pressure pump 205 and the fire extinguishing pump 211 are stopped, the fire detector 202 enters a normal monitoring state where no fire is detected. That is, the sprinkler fire fighting equipment according to the first embodiment is a dry sprinkler fire fighting equipment.

(Fire fighting operation)
Next, fire extinguishing operations of the sprinkler head 100 and the sprinkler fire extinguishing equipment will be described with reference to FIGS. 1 and 2.

When the fire sensor 202 detects a fire, in the sprinkler fire extinguishing equipment, the fire sensor 202 transmits a fire signal to the control panel 220. Then, the control panel 220 that has received the fire signal opens the on-off valve 203 and activates the negative pressure pump 205. It is preferable that the negative pressure pump 205 is always operated or activated by a fire pre-alarm signal in order to speed up the operation of the sprinkler head 100. In the case of opening with the fire signal, the opening / closing valve 203 is opened for a predetermined time prior to opening the opening / closing valve 210a.
On the other hand, in the sprinkler head 100, the liquid sealed in the glass bulb 15 is thermally expanded by the hot air flow generated by the fire. And if the pressure concerning the hard glass of the glass bulb 15 exceeds the pressure resistance due to this thermal expansion, the hard glass of the glass bulb 15 is broken. At the same time, the valve body 11 supported by the glass bulb 15 falls. Thereby, the water discharge port 3 is opened, and the sprinkler head 100 is in a state in which the fire-extinguishing water can be discharged.

  In the first embodiment, when a fire occurs, the ball 24 serving as a check valve moves upward in the communication passage 23 by the suction force of the negative pressure pump 205. Thereby, the inflow port 21 and the outflow port 22 communicate with each other, and the hot air current in the protection area 201 is sucked into the falling pipe 301 through the water outlet 3. For this reason, the hot airflow passes around the glass bulb 15. Therefore, the heating of the glass bulb 15 is promoted, the thermal expansion speed of the liquid sealed in the glass bulb 15 is increased, the operation time until the sprinkler head 100 is opened is accelerated, and the sensitivity is improved.

  The opening and closing valve 210a is opened to fill the falling pipe 301, the secondary pipe 302, etc. in the event of a fire, either after the valve body 11 has dropped and the water discharge port 3 has been opened. It may be before the water inlet 3 is opened. When the falling pipe 301 and the secondary pipe 302 are filled before the water discharge port 3 is opened, the ball 24 is in contact with the tapered portion of the communication path 23 so that the communication path 23 is closed. It can prevent fire extinguishing water from leaking.

  In the first embodiment, the check valve mechanism 20 is provided in the valve body 11, but may be provided in another place. For example, the check valve mechanism 20 may be provided so that the inlet 21 is provided below the flange 5 and the outlet 22 is provided on the side surface of the water outlet 3. Further, the check valve mechanism 20 does not necessarily require the spiral spring 25. The present invention can be implemented by, for example, projecting a cover portion or the like shaped like a spring retainer 26 from the head 13 of the valve body 11 so that the ball does not come out from the outlet 22.

  In the first embodiment, the negative pressure pump 205 is provided in the sprinkler fire extinguishing equipment, but the present invention can also be implemented in a dry sprinkler fire extinguishing equipment in which no negative pressure pump is provided. For example, a negative pressure pump may be connected to the drainage pipe 321 shown in FIG. The fire extinguishing water in the falling pipe 301 can be sucked (removed) by starting the negative pressure pump and opening the end test valve 206.

Embodiment 2. FIG.
In the first embodiment, the sprinkler head 100 using the glass bulb 15 as the thermal decomposition mechanism has been described. Even if a sprinkler head other than the sprinkler head 100 is used, the present invention can be implemented. In the second embodiment, items that are not particularly described are the same as those in the first embodiment, and the same functions and configurations are described using the same reference numerals.

FIG. 3 is a schematic longitudinal sectional view of a sprinkler head according to Embodiment 2 of the present invention.
The sprinkler head 110 includes a head body 111, a frame 120, a valve body 130, a deflector assembly 140, a thermal decomposition mechanism 150, and the like.

  The head main body 111 has a substantially cylindrical shape, and a water discharge port 113 is provided through the center. A screw portion 114 connected to a pipe (rising pipe 301 shown in FIG. 2) is formed at the upper part of the head main body 111, and a cylindrical flange 115 is provided at the lower part of the head main body 111, for example. A groove 116 is formed in the lower portion of the flange 115, and a female screw portion into which a frame 120 described later is screwed is formed in the inner peripheral portion. In the groove portion 116, a cylindrical tube portion 117 is provided on the outer peripheral portion of the water discharge port 113 so as to protrude downward.

  The cylindrical frame 120 has a male threaded portion on the upper outer peripheral surface side. The frame 120 is connected to the lower side of the head main body 111 by screwing the male screw portion and the female screw portion formed in the groove portion 116 of the head main body 111. Further, a step portion 121 for locking the stopper ring 144 of the deflector assembly 140 is provided on the lower inner peripheral surface side of the frame 120. The stepped portion 121 is provided with a tapered portion for locking the lock ball 155 of the thermal decomposition mechanism 150.

  A valve body 130 is provided below the water outlet 3. The valve body 130 includes a substrate 132, a head 133, and the like. The substantially cylindrical substrate 132 is formed so that its outer diameter is slightly larger than the diameter of the water discharge port 113. A substantially cylindrical head 133 having a diameter smaller than that of the substrate 132 is formed at the center of the upper portion of the substrate 132. In a state where the lower part of the substrate 132 is supported by the balancer 158 of the thermal decomposition mechanism 150, the head 133 is inserted into the water outlet 113 and closes the lower part of the water outlet 113.

  The valve body 130 is provided with a check valve mechanism 20. The check valve mechanism 20 includes an inlet 21, an outlet 22, a communication path 23, a ball 24 serving as a check valve, a spiral spring 25, a spring retainer 26, and the like. For example, the two inlets 21 are formed in the lower part of the valve body 130, and the outlet 22 is formed in the upper part of the valve body 130. The inlet 21 and the inlet are communicated with each other through a communication path 23. The communication passage 23 has an upper inner diameter that is tapered, and a tapered portion is formed at a position where the inner diameter changes. A ball 24 serving as a check valve is provided in the communication path 23. The ball 24 is urged by a spiral spring 25 provided between the ball 24 and the spring retainer 26. Accordingly, the ball 24 is in contact with the tapered portion of the communication path 23. The spring retainer 26 is projected from the head 133 of the valve body 130, for example.

The deflector assembly 140 includes a deflector 141, a support 142, a stopper ring 144, and the like.
The substantially disc-shaped deflector 141 has a hole at the center. The deflector assembly 140 is attached to the lower part of the valve body 11 by inserting a caulking piece protruding from the lower part of the valve body 11 into the hole and caulking. A plurality of support columns 142 are erected on the upper surface portion of the deflector 141. The column 142 is arranged in the groove 116 of the frame 120 so that the upper portion of the column 142 surrounds the cylindrical portion 117 of the frame 120 when the sprinkler head 110 is assembled. A donut-shaped stopper ring 144 is provided at the upper ends of these columns 142.

  The thermal decomposition mechanism 150 is provided below the valve body 130 and supports the valve body 130. The thermal decomposition mechanism 150 includes a decomposition part support cylinder 151, a cylinder 152, a thermal plate 153, a decomposition part presser 154, a lock ball 155, a set screw 156, a fusible alloy 157, a balancer 158, and the like. Here, the cylinder 152, the heat sensitive plate 153, and the fusible alloy 157 serve as a heat sensitive part.

  The decomposition part support cylinder 151 has a bottomed cylindrical shape. A plurality of ball insertion holes 151 a each having a tapered hole whose inner diameter (smaller diameter side) is smaller than the outer diameter of the lock ball 155 and whose outer peripheral side is smaller in diameter are provided on the side surface of the disassembly portion support cylinder 151. In addition, a cylinder 152 constituting a heat sensitive part is provided at the bottom of the disassembling part support cylinder 151 and is open to the bottom of the disassembling part support cylinder 151. A heat sensitive plate 153 is provided on the outer wall of the cylinder 152.

  The substantially disc-shaped disassembling part presser 154 is formed to be slightly smaller than the inner diameter of the disassembling part supporting cylinder 151. A tapered portion is formed on the outer peripheral portion of the disassembling portion presser 154. Further, a set screw 156 is screwed into the female screw portion formed at the center of the disassembling portion presser 154. The disassembling part presser 154 and the set screw 156 are placed on a fusible alloy 157 made of, for example, compression solder or the like provided in the cylinder 152.

  A lock ball 155 is inserted into the ball insertion hole 151 a of the disassembly unit support cylinder 151. In a state where the sprinkler head 110 is assembled, the lock ball 155 is held by the stepped portion 121, the inner peripheral portion of the ball insertion hole 151a, and the tapered portion of the disassembling portion presser 154. As a result, the thermal decomposition mechanism 150 is locked and supports the valve element 130 via the balancer 158. Note that the disassembly portion support cylinder 151, the disassembly portion presser 154, and the balancer 158 are each provided with one or more through holes 159 for allowing air to pass therethrough.

  When a fire occurs, the hot air current heats the heat sensitive plate 153. The heat propagates to the cylinder 152, and the fusible alloy 157 housed inside the cylinder 152 begins to melt. The melted soluble alloy 157 flows out of the cylinder 152 and the volume decreases.

  When the volume of the fusible alloy 157 decreases, the decomposed part presser 154 descends corresponding to the decrease in the volume. As a result, the lock ball 155 whose movement has been restricted starts to move into the disassembly unit support cylinder 151. When the lock ball 155 moves to the inside of the disassembly unit support cylinder 151, the disengagement state of the disassembly unit support cylinder 151 is released. As a result, the valve body 130 and the thermal decomposition mechanism 150 are dropped and the water discharge port 113 is opened, so that the fire-extinguishing water can be discharged.

  Also in such a sprinkler head 110, the ball 24 serving as a check valve moves upward in the communication passage 23 by the suction force of the negative pressure pump 205 at the time of draining after completion of the water leak inspection. Thereby, the inflow port 21 and the outflow port 22 communicate with each other, and the air in the protection area 201 is sucked into the falling pipe 301 through the water outlet 3. For this reason, the fire extinguishing water in the falling piping 301 can also be sucked (removed), and corrosion in the falling piping 301 can be suppressed.

  When a fire occurs, the ball 24 serving as a check valve moves upward in the communication passage 23 by the suction force of the negative pressure pump 205. Thereby, the inflow port 21 and the outflow port 22 communicate with each other, and the hot air current is sucked into the falling pipe 301 through the water discharge port 113. For this reason, the thermal air current passes through the periphery of the heat sensitive part of the thermal decomposition mechanism 150 so as to pass through the communication passage 23 through the through holes 159 formed in the decomposition part support cylinder 151, the decomposition part presser 154, and the balancer 158. It will be. Therefore, the melting rate of the fusible alloy 157 is increased, and the sensitivity of the sprinkler head 110 is improved.

  DESCRIPTION OF SYMBOLS 1 Head main body, 3 Water discharge port, 4 Screw part, 5 Flange, 6 Frame, 7 Arm part, 8 Bearing part, 9 Female thread part, 10 Push screw, 11 Valve body, 12 Board | substrate, 13 Head, 14 Disc spring, 15 Glass valve, 16 deflector, 20 check valve mechanism, 21 inlet, 22 outlet, 23 communication path, 24 balls, 25 spiral spring, 26 spring retainer, 100 sprinkler head, 110 sprinkler head, 111 head body, 113 water outlet , 114 Thread, 115 Flange, 116 Groove, 117 Tube, 120 Frame, 121 Step, 130 Valve body, 132 Substrate, 133 Head, 140 Deflector assembly, 141 Deflector, 142 Prop, 144 Stopper ring, 150 Thermal decomposition Mechanism, 151 Disassembly unit support cylinder, 151a Insertion hole, 152 cylinder, 153 Heat sensitive plate, 154 Decomposition part press, 155 Lock ball, 156 Set screw, 157 Soluble alloy, 158 Balancer, 159 Through hole, 201 Protected area, 202 Fire detector, 203 Open / close valve, 204 Vacuum chamber, 205 Negative pressure pump, 206 Terminal test valve, 210 Flowing water detection device, 210a Open / close valve, 211 Fire extinguishing pump, 212 Fire extinguishing water tank, 220 Control panel, 301 Falling piping, 302 Secondary piping, 303 piping, 310 piping 311 piping, 312 piping, 320 drainage piping, 321 drainage piping.

Claims (4)

A sprinkler head is used in a sprinkler fire extinguishing equipment in which a negative pressure pump is connected to a pipe to which a sprinkler head is connected, and the inside of the pipe is brought into a negative pressure state by the operation of the negative pressure pump,
The sprinkler head is
A head body in which a water outlet is formed inside a cylindrical tube portion;
A frame provided below the head body;
A valve body for closing the water outlet;
A thermal decomposition mechanism for supporting the valve body;
A sprinkler head, comprising: a check valve mechanism for flowing air around the thermal decomposition mechanism toward the water discharge port. The sprinkler head according to claim 1, wherein the check valve mechanism is provided in the valve body. The check valve mechanism is
An inflow port formed in at least one of a lower part and a side part of the valve body;
An outlet formed in the upper part of the valve body;
A check valve provided in a communication passage communicating the outlet and the inlet;
The sprinkler head according to claim 2, further comprising: A negative pressure pump is connected to the pipe to which the sprinkler head is connected,
In the sprinkler fire extinguishing equipment in which the inside of the pipe is brought into a negative pressure state by the operation of the negative pressure pump,
A sprinkler fire extinguishing equipment comprising the sprinkler head according to any one of claims 1 to 3.

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