JP5767451B2 - Sprinkler head - Google Patents

Description

The present invention relates to a closed-type sprinkler head that decomposes and discharges water by melting due to heat during a fire.

  Conventionally, in this type of closed-type sprinkler head, when a hot air current from a fire is received, the fusible alloy provided in the heat-sensitive working part melts and the heat-sensitive working part is thermally decomposed to open the valve. At the same time, the deflector is dropped downward to discharge the fire-fighting water. As the fusible alloy provided in the heat-sensitive operation unit, a low-temperature solder having a predetermined melting point necessary for fire detection is usually used.

  FIG. 5 is a cross-sectional view of a conventional closed sprinkler head. In FIG. 5, the closed sprinkler head 100 includes a head body 112 and a frame 114. The head main body 112 is provided with a screw part 115 connected to the water supply pipe 110 at the upper part, and a flow path penetrating vertically is formed inside, and a nozzle 116 opened at the lower side of the flow path is formed. The head body 112 has a frame 114 screwed and fixed outside the opening of the nozzle 116.

  In this assembled state, the valve body 120 integrally provided with the deflector 118 is arranged at a position where the opening of the nozzle 116 is closed. The deflector 118 includes a plurality of radially diffusing water diffusion portions around the periphery, and a guide pin 122 is attached to the outer periphery thereof.

  An operating spring 126 is incorporated between the head main body 112 and the guide ring 124 disposed on the upper side of the deflector 118. On the opening side of the frame 114, a heat sensitive operation unit 128 having a link mechanism is provided.

The present invention
The heat sensitive operation unit 128 includes a saddle 130, a lever 132, a support plate 134, a balancer 136, a cylinder 138, a plunger 140, a fusible alloy 142, a set screw 144, a fixing screw 146, a heat collecting plate 148, and a cover 150. The body 120 is assembled and fixed to the frame 114 in a state of being fixed by a fusible alloy 142 that holds the body 120 in the illustrated closed position.

  The operation of the closed sprinkler head of FIG. 5 is as follows. The closed-type sprinkler head 100 is connected to the water supply pipe 110 of the sprinkler fire extinguishing equipment with the valve body 120 closing the nozzle 116. When a hot air current is received in this state, a thermal operation is performed when the temperature reaches a predetermined temperature. The soluble alloy 142 of the part 128 is melted, and the balancer 136 is in a free state.

  For this reason, the engagement state of the lever 132 and the balancer 136 is released, the lever 132, the saddle 130 and the balancer 136 are dropped, and at the same time, the cylinder 138, the plunger 140, the set screw 144, the fixing screw 146, the heat collecting plate 148 and the cover 150. The part of also falls off. As a result, the support of the valve body 120 in the closed state is released, and the valve body 120 and the deflector 118 are dropped by the water pressure of the fire-extinguishing water applied to the nozzle 116 serving as the inflow passage and the force of the operating spring 126, Open and discharge fire-fighting water.

  The deflector 118 dropped to the lower side stops at the lower end of the guide pin 122 to expose the deflector 118 downward from the opening of the frame 114, and the fire extinguishing water discharged from the nozzle 116 hits the deflector 118 and the surrounding fire extinguishing water. Watering.

  On the other hand, in recent years, fires at simple facilities such as group homes, which are widely used as facilities for the elderly, have become a social problem, and in the event of a fire, the installation of sprinkler equipment that discharges fire-fighting water from the sprinkler head has become a problem. There is a strong demand.

As the sprinkler equipment installed in such a simple facility for elderly people, the use of tap water as a water source eliminates the need for a pump equipment, simplifies the equipment configuration, and reduces the burden in terms of cost.

Japanese Patent Laid-Open No. 2005-304877 JP 2000-342708 A

  By the way, in the construction of normal sprinkler fire extinguishing equipment, firefighters with legal qualifications perform installation work for sprinkler heads. Quality, reliable and guaranteed construction is underway.

  However, in sprinkler fire extinguishing equipment for elderly facilities that use tap water as the water source, since water is used as the water source, the water contractor may install the sprinkler head instead of the fire engineer. There is a risk that the installation work of the head is not necessarily guaranteed. Particularly problematic is water leakage from a sprinkler head connection to a water supply pipe to which tap water is supplied.

  Normally, the sprinkler head pipe connection work is to wrap the screw thread for sprinkler head pipe connection with bulka tape as a seal material and screw it into the pipe screw hole. Otherwise, slight water leakage will occur during long-term use, causing the problem that the sprinkler head does not operate in the event of a fire or that the operation delay increases.

  This is because the water leaked from the pipe connection part goes into the heat-sensitive operation part 128 of the sprinkler head 100 for a long time, and wets the vicinity of the cylinder 138 and the heat collecting plate 148 in which the fusible alloy 142 is stored. It takes time for the fusible alloy 42 to reach the melting temperature even if it is received, and there is a concern that the fire may spread during that time and seriously hinder the fire suppression by the sprinkler operation.

An object of the present invention is to provide a highly reliable sprinkler head that can be reliably operated without causing an operation delay in the event of a fire even if water leaks from a pipe connection portion.

The present invention
A head body having a threaded portion connected to the pipe at the upper end and a flow path communicating vertically with the center and provided with a nozzle at the lower end;
A cylindrical frame disposed at the bottom of the head body and opening downward;
A heat-sensitive operation unit including a link mechanism that is disposed on the opening side of the frame and supports a valve body that closes the nozzle by a heat-sensitive member exposed below the frame ;
In sprinkler head with
A cylindrical plate is attached to the outside of the head main body, and a sealing plate disposed away from the outer periphery of the frame ;
A cylindrical water leakage guide member that is arranged between the frame and the sealing plate and guides external water from the piping side to fall outside from the inside of the cylindrical part of the sealing plate while preventing the water from entering the heat-sensitive operating part. When,
With
The water leakage guide member is characterized in that the inner diameter is larger than the outer diameter of the heat-sensitive operating part, and the outer diameter is formed so as to provide a gap through which external water can pass between the inside of the cylindrical part of the sealing plate. To do.

Here, the upper portion of the leakage guide member, Ru provided in the head body via a sealing member.

Further, the water leakage guide member forms a skirt portion that spreads outward at the lower end .

Here, the upper part of the water leakage guide member is fixed to the head body via the seal member.

  According to the present invention, even if water leaks from a screw portion or the like connecting a sprinkler head to a water supply pipe to which pressurized fire extinguishing water such as tap water is supplied, the water leaked along the head body It flows down along the cylindrical water leakage guide member arranged to cover the outside of the frame arranged at the lower part of the frame and reliably prevents leakage of water around the heat sensitive operation mechanism built in the frame. Prevents water from leaking around the heat-sensitive member and the heat-collecting plate and getting wet, and collecting heat when receiving a hot air current from a fire to reliably detect heat and disassemble the heat-sensitive member By doing so, water can be reliably discharged without increasing the operation delay, and the fire can be suppressed and extinguished.

In addition, for sprinkler heads that have a protective cover that covers the heat-sensitive working part known as the conshielded type and that decomposes at a lower temperature, the water leakage that covers the outside of the frame placed at the bottom of the head body In addition to the guide member, a water drain hole is provided in the protective cover, so that water does not collect at the bottom of the protective cover even if water leaks. The protective cover can be surely removed to expose the heat-sensitive operating part, and then the heat-sensitive operating part can be thermally decomposed by the operation of the high-temperature heat-sensitive member to reliably discharge water.

Sectional drawing which showed embodiment of the sprinkler head by this invention Explanatory drawing showing the sprinkler head of FIG. 1 installed on the ceiling surface Explanatory drawing which showed embodiment of the conshield type sprinkler head by this invention Explanatory drawing showing the sprinkler head of FIG. 3 installed on the ceiling surface Sectional view showing a conventional sprinkler head

  FIG. 1 is an explanatory view showing an embodiment of a closed-type sprinkler head according to the present invention in a half section in the axial direction. In FIG. 1, the sprinkler head 10 according to this embodiment includes a head main body 12 and a frame 14 that is screwed and fixed to a lower portion of the head main body 12. The head body 12 is provided with a flow path penetrating in the upper and lower axial directions, and a nozzle 16 is formed below the flow path.

  A valve body 20 integrally provided with a deflector 18 is disposed at the opening of the nozzle 16 so as to be in a closed position. The deflector 18 includes a plurality of radially diffusing water diffusing portions, and a guide pin 22 extending in the axial direction is attached to the outside thereof. A guide plate 24 is disposed between the deflector 18 and the lower opening of the head body 12, and an operating spring 26 that presses the deflector 18 downward is disposed above the guide plate 24.

  On the opening side of the frame 14, a heat-sensitive operation unit 28 having a link mechanism is provided. From the upper side, the heat-sensitive operation unit 28 includes a saddle 30, a lever 32, a support plate 34, a balancer 36, a cylinder 38, a plunger 40, a fusible alloy 42, a set screw 44, a fixing screw 46, two heat collecting plates 48, and a cover 50. The valve body 20 is assembled and fixed to the frame 14 in a state where the valve body 20 is fixed to the position where the opening of the nozzle 16 is closed with a soluble alloy 42.

  The structure of such a sprinkler head 10 is basically the same as that of the conventional structure shown in FIG. 5. In addition, in this embodiment, the lower end of the lower opening of the head body 12 and the frame A cylindrical water leakage guide member 52 is incorporated and fixed at a position on the outside of 14 through an upper seal 56. Further, the water leakage guide member 52 is integrally formed with a skirt portion 54 that spreads outward at the lower end.

When the sprinkler head 10 is connected to the water supply pipe and the water leakage guide member 52 leaks water due to fire extinguishing water from the threaded portion 15 connected to the pipe, the water leakage flowing through the outside of the head body 12 is prevented. The heat-sensitive operation unit 28 that is incorporated and fixed in the frame 14 is arranged so as not to enter.

  FIG. 2 is an explanatory diagram showing the sprinkler head of FIG. 1 installed on the ceiling surface. In FIG. 2, the sprinkler head 10 of the present embodiment is viewed from above with the mounting hole 60 provided in the ceiling surface 58 positioned so that the heat collecting plate 48 at the front end protrudes below the ceiling surface 58. It is connected and fixed to the tip of the lowered water supply pipe 11 by a screw portion 15.

  For example, in the case of a sprinkler fire extinguishing system using tap water as a water source in an elderly facility such as a group home, the water supply pipe 11 is a water supply pipe 11 and a sprinkler head at the tip thereof. 10 is connected.

  When water supply for fire extinguishing is performed with tap water, the piping work of the water supply pipe 11 is not an operator who has the qualification of a fire fighting equipment person in a normal sprinkler fire extinguishing equipment, and a water works contractor may also perform construction. When the sprinkler head 10 is connected to the water supply pipe 11, the sprinkler head 10 is screwed and fixed in a state where a sealing material such as a seal tape is wound around the screw portion 15, and the water supply pipe 11 is filled with tap water. The water leakage from the part 15 is prevented.

  When the sprinkler head 10 is screwed and fixed to the water supply pipe 11, a sealing plate 62 made of a plastic material is inserted from below into the sprinkler head 10 located in the mounting hole 60 from the ceiling surface 58 side. Try to hide the gap.

  When the sprinkler head 10 is attached to the water supply pipe 11 as described above, the water supply pipe 11 side is always filled with pressurized tap water, and there is a problem in sealing performance due to screwing of the screw portion 15 into the water supply pipe 11 by any chance. If there is, the fire extinguishing water leaks from the connecting portion of the screw portion 15 to the water supply pipe 11 as shown by the arrow, but leaks.

  The water leaked through the clearance of the screw portion 15 flows through the clearance between the sealing plate 62 and the head main body 12, but in this embodiment, it is screwed and fixed inside the lower end of the head main body 12. Since the water leakage guide member 52 is disposed outside the frame 14 via the seal 56, the water leaking down through the gap between the sealing plate 62 and the head body 12 flows down along the water leakage guide member 52, The water leakage guide member 52 is guided to the outside by the skirt portion 58 at the tip, and falls through the inside of the sealing plate 62.

  For this reason, even if there is leakage of fire-extinguishing water from the screw portion 15, it is possible to reliably prevent leakage of water into the heat-sensitive operating portion 28 incorporated inside the frame 14 due to the arrangement of the water leakage guide member 52. . That is, even if there is water leakage at the bottom of the cover 50 or the heat collecting plate 48 outside the fusible alloy 42 in the heat sensitive operation part 28, water does not adhere and become wet. Even if water leakage occurs, it is possible to reliably prevent the heat conduction to the working part that receives the thermal airflow caused by the fire in the heat-sensitive operating unit 28 and performs the heat-sensitive operation due to water leakage.

  In addition, if the water leaked in the installed state has a relatively large amount of water leaking from the sprinkler head 10, repair work can be performed by recognizing the water leak and re-sealing the screw portion 15, but the water leaks from the sprinkler head 10. There is almost nothing, and even if it is leaked, if it is leaked to a slight extent, it will be used as it is without noticing the leak. With regard to such a situation, in the present embodiment, even if there is a slight water leak that oozes out, the water leakage guide member 52 is disposed, so that water leaks around the soluble alloy and gets wet. In the event of a hot air current from a fire, heat conduction to the fusible alloy 42 can be reliably performed, and the fusible alloy 42 can be melted and operated without causing an operation delay.

  FIG. 3 is an explanatory view showing an embodiment of a conshielded sprinkler head. 3, the conshielded sprinkler head 10 has a frame 14 screwed and fixed to the lower side of the head body 12, and a heat-sensitive operation unit 28 having the same structure as that of the embodiment of FIG. doing.

  In the case of the conshielded sprinkler head 10, a conshield main body 64 serving as a cylindrical mounting member is attached to the head main body 12, and a bowl-like shape that covers the heat-sensitive operation portion 28 of the sprinkler head 10 at the bottom of the conshield main body 64. A conshield 66 is disposed as a cover member.

Attachment to the Con shield body 64 con shield 66 is partially connected by a low temperature fusible alloy 70 at the edge of the both members. In the gap between the conshield main body 64 and the conshield 66, an operating spring 74 for applying a load in the disassembly direction is incorporated.

Here, the fusible alloy used for the heat-sensitive operating unit 28 has a melting temperature of, for example, 72 ° C. as the first fusible alloy. In contrast low temperature fusible alloy 70 that secure the con shield 66 is a second fusible alloy, in which the first lower eg 65 ° C. than fusible alloy using a melt temperature in the heat-sensitive actuating portion 28 Is set.

  In this embodiment, a cylindrical water leakage guide member 52 is disposed outside the frame 14 that is screwed and fixed to the head main body 12 with respect to such a conshielded sprinkler head 10. In addition, drain holes 78 are formed at a plurality of locations at the bottom of the conshield 66 disposed below the shield body 64.

  FIG. 4 is an explanatory view showing the conshielded sprinkler head of FIG. 3 installed on the ceiling surface. In FIG. 4, the conshielded sprinkler head 10 is screwed and fixed to the tip of a water supply pipe 11 that is lowered from a pipe that receives pressurized supply of tap water by using a sealing material such as a seal tape by a screw portion 15. Has been. The sprinkler head 10 is disposed in a mounting hole 60 provided in the ceiling surface 58, is disposed at a position where the conshield 66 is exposed from the ceiling surface 58, and a sealing plate 80 is used to close the gap with the mounting hole 60. Wearing.

  If the fire-extinguishing water leaks from the clearance of the screw portion 15 of the sprinkler head 10 connected to the water supply pipe 11 in the installed state of the sprinkler head 10, the arrow passes through the clearance between the conshield main body 64 and the head main body 12. However, since the water leakage guide member 52 is disposed outside the frame 14, it is possible to prevent the leaked water from flowing into the heat-sensitive operation unit 28 inside the frame 14.

The leakage guides flowing down water along the outside of the member 52 is entering into the lower part of the con shield 66, since the bottom of the con shield 66 drain hole 78 is provided, the low-temperature fusible alloy 70 Water can be drained outside without collecting water.

The operation of the conshielded sprinkler head 10 during a fire is as follows. Upon receiving the hot air in a fire in Con shield 66 melts when the low temperature fusible alloy 70 has reached the set temperature, for example 65 ° C., fixed con shield 66 for con shield body 64 is released, the actuating spring 74 The conshield 66 is removed by force and falls off.

  As a result, the heat-sensitive operating portion 28 of the sprinkler head 10 directly receives a hot air flow due to a fire. When the fusible alloy (first fusible alloy) provided in the heat-sensitive operation unit 28 reaches a predetermined temperature, for example, 70 ° C., the heat-sensitive operation unit 28 is decomposed and opened to discharge the fire-fighting water. Become.

  1 and 3, the skirt portion 54 is provided at the lower end of the water leakage guide member 52, but the skirt 54 is not necessarily provided. Although it is necessary to provide a seal so that water does not enter from the gap between the upper end portion of the water leakage guide member 54 and the head main body 12, the head main body and the water leakage guide member 52 may be formed integrally. The position of the lower end of the water leakage guide member is a position that does not deteriorate the thermal efficiency of the thermal operation part during normal monitoring, and a position where water leakage does not come into contact with the thermal operation part, and adversely affects the radiation of fire-fighting water by the lowered deflector during operation. The position must not be

  Further, the structure of the closed sprinkler head shown in the above embodiment is not limited to this embodiment, and any structure may be used as long as it has a screw part connected to the water supply pipe and a heat-sensitive operating part is arranged at the lower part of the head body. A structure in which the water leakage guide member is arranged so that the water leakage from the screw portion does not enter the heat-sensitive operation part at the lower part of the head body can be applied.

  In addition, the conshielded sprinkler head shown in FIG. 3 also has conshielded sprinkler heads of various structures. However, a leakage guide member that guides leakage from the head body screw portion is provided outside the thermal operation portion. Further, by providing a drain hole at the center of the bottom of the conshield or at an appropriate position on the bottom, it is possible to similarly prevent a delay in operation and inactivity due to water leakage.

  In the present invention, it is possible to prevent water that has traveled through the pipe from being applied to the heat-sensitive operation section, not limited to water leakage from between the water supply pipe and the screw section.

  The configuration of the heat-sensitive operation unit is not limited to the above-described embodiment, and may be any mechanism that can be disassembled when the heat of the fire is received and the nozzle is closed by the valve body. The heat sensitive member that senses the heat of the fire is not limited to a fusible alloy and may be a glass bulb or the like.

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

10: Sprinkler head 11: Water supply pipe 12: Head main body 14: Frame 16: Nozzle 18: Deflector 20: Valve body 26: Actuating spring 28: Thermal operation part 30: Saddle 32: Lever 34: Support plate 36: Balancer 38: Cylinder 40: Plunger 42: Soluble alloy 48: Heat collecting plate 50: Cover 52: Water leakage guide member 54: Skirt portion 56: Seal 64: Conshield main body 66: Conshield 70: Low temperature fusible alloy 74: Actuating spring

Claims (3)

A head body having a threaded portion connected to the pipe at the upper end and a flow path communicating vertically with the center and provided with a nozzle at the lower end;
A cylindrical frame disposed at the bottom of the head body and opening downward;
A heat-sensitive operation part provided with a link mechanism disposed on the opening side of the frame and supporting a valve body that closes the nozzle by a heat-sensitive member;
In sprinkler head with
A cylindrical plate is attached to the outside of the head main body, and a sealing plate disposed apart from the outer periphery of the frame ;
Are arranged between the frame sealing plate, the cylinder of the external water is guided so that it prevents the diffraction of the said heat sensitive operating portion falls outside from the tubular portion inside the sealing plate from the pipe side A water leakage guide member ,
With
The water leakage guide member is formed so that an inner diameter is larger than an outer diameter of the heat-sensitive operation portion, and an outer diameter is provided between the inner side of the cylindrical portion of the sealing plate so that the external water can pass therethrough . Sprinkler head characterized by that.

2. The sprinkler head according to claim 1, wherein an upper portion of the water leakage guide member is provided on the head main body via a seal member.
2. The sprinkler head according to claim 1, wherein the water leakage guide member is formed with a skirt extending outward at a lower end.

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