Housing type joint cooling system

Abstract

To provide a cooling system of a housing type joint, in which a housing type joint installed in a dry type piping or an empty piping can keep airtightness even when a fire occurs.SOLUTION: A cooling system 1 of a housing type joint, which includes a housing type joint 9 installed in a dry type piping 5 of a dry type sprinkler facility 11, and a cooling device 59 for cooling the housing type joint 9 is such that: the cooling device 59 includes a closed type water discharge head 61 disposed in the dry type piping 5; and a liquid body flowing in the dry type piping 5 is ejected from the closed type water discharge head 61 to the housing type joint 9 by operation of the closed type water discharge head 61 due to heat generated when a fire occurs.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a cooling system for a housing-type joint that uses a coolant to cool the housing-type joint. [Background technology]

[0002] Conventionally, housing joints have been used, for example, as joints for water pipes (see Patent Document 1). When a housing joint is installed within an automatic wet sprinkler system, it is sufficient for the housing joint to pass a light and easy heat resistance test. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-221333 Summary of the Invention [Problem to be solved by the invention]

[0004] When using housing-type fittings on dry or empty piping, the housing fittings must pass a strict test known as the standard heat resistance test. Dry piping refers to the air-pressurized piping section of a dry sprinkler system or a pre-action sprinkler system. Empty piping refers to the unfilled piping section on the secondary side of the simultaneous release valve of a foam fire extinguishing system, or the open-type sprinkler head or water-discharge head piping section of a sprinkler system that is open to the atmosphere.

[0005] Currently, there are no housing-type fittings on the market that have passed the standard heat resistance test, but due to the convenience of housing-type fittings (ease of installation on piping, etc.), there is a great demand for using housing-type fittings for dry piping and empty piping.

[0006] The reason why housing-type fittings cannot be used with dry piping or empty piping is that housing-type fittings maintain their airtightness by tightly sealing with gaskets made of synthetic resins such as EPDM, and the heat of a fire can melt the gaskets, which could cause water leaks or the pipe to come loose.

[0007] Regarding the use of housing-type joints for wet piping, cooling is performed by the water present in the piping, so housing-type joints maintain airtightness in the event of a typical fire and there are no functional problems.

[0008] An object of the present invention is to provide a cooling system for a housing-type joint that can maintain airtightness of a housing-type joint installed in a dry piping or an empty piping even in the event of a fire, etc. In this invention, dry sprinkler systems, pre-action sprinkler systems, and foam fire extinguishing systems are collectively referred to as fire extinguishing systems. [Means for solving the problem]

[0009] The first invention is It is configured with a gasket, Housing type joints installed in dry or empty piping of fire extinguishing equipment and Avoiding the melting of the gasket and a cooling device that cools the housing-type joint using a liquid to prevent the sealing function of the housing-type joint from being impaired.

[0010] A second invention is a cooling system for a housing-type joint, which includes a housing-type joint installed in the dry piping of a dry-type sprinkler system, the dry piping of a pre-action sprinkler system, or the empty piping of a fire extinguishing system, and a cooling device for cooling the housing-type joint, wherein the cooling device is equipped with a closed-type water-discharge head installed in the dry piping or the empty piping, and is configured so that when a fire occurs, heat causes the closed-type water-discharge head to operate, causing a liquid that has flowed through the dry piping or the empty piping to be discharged from the closed-type water-discharge head toward the housing-type joint.

[0011] A third invention is a cooling system for a housing-type joint, which includes a housing-type joint installed in the dry piping of a dry-type sprinkler system, the dry piping of a pre-action sprinkler system, or the empty piping of a fire extinguishing system, and a cooling device for cooling the housing-type joint, the cooling device comprising a cooling liquid container containing a cooling liquid and a closed-type water-discharge head, and which is configured so that when a fire occurs, heat activates the closed-type water-discharge head, causing the cooling liquid stored in the cooling liquid container to be discharged from the closed-type water-discharge head toward the housing-type joint.

[0012] A fourth invention is a cooling system for a housing-type joint according to claim 2 or claim 3, wherein the closed-type water-discharge head is installed above the floor of a building, and the ratio of the distance between the floor and the closed-type water-discharge head in the vertical direction to the distance between the closed-type water-discharge head and the housing-type joint in the horizontal direction is 0.18 or less.

[0013] The fifth invention is a cooling system for a housing-type joint, which comprises a housing-type joint installed in the dry piping of a dry-type sprinkler system, the dry piping of a pre-action sprinkler system, or the empty piping of a fire extinguishing system, and a cooling device for cooling the housing-type joint, wherein the dry piping or empty piping is connected to a filled piping via an open valve, and the cooling device has a sensing head provided on the open valve and a water discharge head provided on the dry piping, and when a fire occurs, the sensing head is activated by heat, opening the open valve and causing liquid in the filled piping to flow into the dry piping or the empty piping, and the flowing liquid is then discharged from the water discharge head toward the housing-type joint.

[0014] A sixth invention is a cooling system for a housing-type joint according to the fifth invention, in which the sensing head is installed above the floor of a building, and the ratio of the value of the distance between the sensing head and the housing-type joint in the horizontal direction to the value of the distance between the floor and the sensing head in the vertical direction is 0.18 or less.

[0015] The seventh invention is a cooling system for a housing-type joint, which comprises a housing-type joint installed in the dry piping of a dry sprinkler system, the dry piping of a pre-action sprinkler system, or the empty piping of a fire extinguishing system, and a cooling device for cooling the housing-type joint, wherein the dry piping or empty piping is connected to a water-filled piping via an open valve, and the cooling device is equipped with a heat-sensitive open joint and a water discharge head provided on the water-filled piping, and is configured so that when a fire occurs, the heat-sensitive open joint is activated, causing the liquid in the water-filled piping to be discharged from the water discharge head toward the housing-type joint.

[0016] An eighth invention is a cooling system for a housing-type joint related to the seventh invention, in which the heat-sensitive release joint is installed above the floor of a building, and the ratio of the value of the distance between the heat-sensitive release joint and the housing-type joint in the horizontal direction to the value of the distance between the floor and the heat-sensitive release joint in the vertical direction is 0.18 or less. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide a cooling system for housing-type joints that can maintain airtightness of housing-type joints installed in dry piping or empty piping even in the event of a fire, etc. [Brief explanation of the drawings]

[0018] [Figure 1] 1A and 1B are diagrams illustrating a housing-type joint that is a cooling target of a cooling system for a housing-type joint according to an embodiment of the present invention and how the housing-type joint is installed, where (b) is a diagram showing the IB-IB cross section in (a), and (c) is a diagram showing the state before the housing-type joint is installed in a pipe. [Figure 2] 1 is a diagram showing a cooling system for a housing-type joint according to a first embodiment of the present invention. [Figure 3] FIG. 6 is a diagram showing a cooling system for a housing-type joint according to a second embodiment of the present invention. [Figure 4]FIG. 10 is a diagram showing a cooling system for a housing-type joint according to a third embodiment of the present invention. [Figure 5] FIG. 10 is a diagram showing a cooling system for a housing-type joint according to a fourth embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing a cooling system for a housing-type joint according to a fifth embodiment of the present invention. [Figure 7] 1 is a diagram showing a dry sprinkler installation in which a cooling system of a housing-type joint according to an embodiment of the present invention is used; [Figure 8] 1 is a diagram showing a pre-action sprinkler system in which a cooling system for a housing-type joint according to an embodiment of the present invention is used; DETAILED DESCRIPTION OF THE INVENTION

[0019] The cooling system 1 for a housing-type joint according to an embodiment of the present invention is a system for cooling a housing-type joint 9 (see Figure 1) used in a dry piping 5 or an empty piping 7 of a fire extinguishing equipment 3, as shown in Figure 2, etc.

[0020] Examples of the fire extinguishing system 3 include sprinkler systems (including water spray fire extinguishing systems) and foam fire extinguishing systems. Examples of the sprinkler systems include sprinkler systems using closed sprinkler heads, sprinkler systems using open sprinkler heads, and sprinkler systems using water-discharge heads. Examples of the sprinkler systems using closed sprinkler heads include wet sprinkler systems, dry sprinkler systems 11 (see Figure 7), and pre-action sprinkler systems 29 (see Figure 8).

[0021] In a wet sprinkler system (not shown), the pipes from the water supply source to the sprinkler head (closed sprinkler head) are constantly filled with pressurized water. When a fire breaks out, the heat activates the sprinkler head, spraying water toward the fire.

[0022] In the dry sprinkler system 11 shown in Figure 7, the piping (secondary piping; dry piping) 5 from the dry flow detection device 13 and control valve 15 to the sprinkler head (closed sprinkler head) 17 is filled with low-pressure air (air with a pressure slightly higher than atmospheric pressure) when there is no fire. The low-pressure air is supplied from an air source 21.

[0023] When a fire breaks out, the heat activates the sprinkler head 17. Then, the air in the dry pipe 5 is discharged from the sprinkler head 17, and the air pressure in the dry pipe 5 drops (to atmospheric pressure). This drop in air pressure opens the control valve 15, allowing water to enter the dry pipe 5 and spray water from the sprinkler head 17 toward the location of the fire.

[0024] 7 is a pressurized water source, 25 is a display board, and 27 is an alarm device. The pressurized water source 23 pressurizes and supplies water from the water source by operating a pump.

[0025] The pre-action sprinkler system 29 shown in Fig. 8 is equipped with a fire detector 31. In the pre-action sprinkler system 29, the piping (secondary piping; dry piping) 5 from the dry-type water flow detection device 33 and control valve 35 to the sprinkler head (closed-type sprinkler head) 37 is filled with low-pressure air when there is no fire. The low-pressure air is supplied from an air source 41.

[0026] When a fire is detected by the fire detector 31, the control valve 35 opens, water enters the dry pipe 5, and the heat generated when the fire occurs activates the sprinkler head 37, which then sprays water toward the location where the fire has occurred.

[0027] 8 is a pressurized water source, 45 is a display panel, 47 is a fire receiver, and 49 is an alarm device. The pressurized water source 43 pressurizes and supplies water from the water source by operating a pump.

[0028] A sprinkler system (not shown) using an open sprinkler head is equipped with a fire detector. In a sprinkler system using an open sprinkler head, the piping (secondary piping) from the control valve to the sprinkler head (open sprinkler head) becomes an empty piping (for example, a piping that is open to the atmosphere and contains air) 7 when there is no fire.

[0029] In a sprinkler system using an open sprinkler head, when a fire is detected by a fire detector, the control valve opens, water enters the empty pipe 7, and the sprinkler head sprays water toward the location of the fire.

[0030] A sprinkler system (not shown) using a water-discharge type head is also equipped with a fire detector. In a sprinkler system using a water-discharge type sprinkler head, the piping (secondary piping) from the control valve to the sprinkler head (water-discharge type sprinkler head) is an empty piping 7 when there is no fire.

[0031] In sprinkler systems using water-discharging heads, when a fire is detected by a fire detector, the control valve opens, water is supplied into the empty pipe 7, and water is discharged from the sprinkler head toward the location of the fire.

[0032] The foam fire extinguishing system (not shown) is comprised of a water source, a pressurized water supply device (fire pump), a foam fire extinguishing agent storage tank, a mixer, and an automatic alarm device (a water flow detection device, a display device, an alarm device, etc.). Furthermore, the foam fire extinguishing system is comprised of a foam outlet (foam head), a sensing head (closed sprinkler head), piping, valves, an emergency power supply, etc.

[0033] Foam fire extinguishing systems mix foam fire extinguishing agent with water for fire extinguishing, and when it is released from the foam discharge port (foam head), it draws in air to form foam, which covers the area where combustion is occurring, and extinguishes the fire through the suffocating effect of the foam and the cooling effect of the water that makes up the foam.In addition, in foam fire extinguishing systems, the piping from the valve to the foam head becomes empty piping7 when a fire occurs.

[0034] The housing-type joint 9 is installed and used in the dry piping 5 of a dry sprinkler system 11, the dry piping 5 of a pre-action sprinkler system 29, and the empty piping 7 of a sprinkler system using an open sprinkler head. The housing-type joint 9 is also installed and used in the empty piping 7 of a sprinkler system using a water-discharge head, and the empty piping 7 of a foam fire extinguishing system.

[0035] Here, the housing-type joint 9 will be described in detail with reference to Fig. 1. In Fig. 1, the housing-type joint 9 is installed and used in a dry pipe 5, but the housing-type joint 9 can also be installed and used in an empty pipe 7 in the same way.

[0036] The housing-type joint 9 is used to connect dry pipes 5A and 5B, and is configured with a gasket 51 and a housing 53. The gasket 51 is made of, for example, a synthetic resin and is formed into a circular ring shape. The housing 53 is made of metal, is formed into a circular ring shape, and is divided into two parts.

[0037] When the housing-type joint 9 is used to connect the dry pipes 5A and 5B, the ends of the dry pipes 5A and 5B are butted together. A gasket 51 covers this butted area. Furthermore, the housing 53 covers the gasket 51. The divided parts of the housing 53 are joined together with bolts 55 and nuts 57 to form a ring shape.

[0038] [First embodiment] Here, the cooling system 1 for a housing-type joint according to the first embodiment will be described with reference to Fig. 2. The cooling system 1 for a housing-type joint is used to cool a housing-type joint 9 that is installed in and used on the dry piping 5 of a dry sprinkler system 11 or the dry piping 5 of a pre-action sprinkler system 29. The cooling system 1 for a housing-type joint may also be installed in and used on the dry piping 7 of a fire extinguishing system or the like.

[0039] The cooling system 1 for the housing-type joint is configured to include a cooling device 59. The cooling device 59 includes a closed-type water discharge head (for example, a closed-type sprinkler head) 61 provided on the metal dry pipe 5 or the metal air pipe 7.

[0040] When a fire breaks out, the cooling device 59 operates the closed-type water-discharge head 61 due to heat, and discharges the liquid (water or aqueous solution) 75 that has flowed through the dry piping 5 or the empty piping 7 from the closed-type water-discharge head 61 toward the housing-type joint 9. This cools the housing-type joint 9.

[0041] In the cooling device 59, the closed-type water-discharge head 61 is installed above the floor 69 of the room 67 of the building 65, away from the floor 69 (located near the ceiling surface 71), and the ratio of the value of the distance X to the value of the distance (height) H is 0.18 or less. The distance H is the distance between the floor 69 and the closed-type water-discharge head 61 (for example, the center of the closed-type water-discharge head 61) in the vertical direction. The distance X is the distance between the closed-type water-discharge head 61 and the housing-type joint 9 (for example, the center of the housing-type joint 9) in the horizontal direction.

[0042] The closed-type water-discharge head 61 is installed on a tee 72 provided midway through the dry piping 5. Reference numeral 73 in FIG. 2 indicates a fire flame, and reference numeral 75 in FIG. 2 indicates a liquid discharged from the closed-type water-discharge head 61.

[0043] Next, the operation of the housing-type joint cooling system 1 will be explained using the dry sprinkler system 11 as an example.

[0044] Under normal conditions when no fire occurs, the dry pipe 5 is filled with air. When a fire occurs, the closed water discharge head 61 is activated (opened) by the heat of the fire flames 73, etc.

[0045] Next, as the pressure inside the dry piping 5 drops, the pump (pump of the pressurized water source 23) of the dry sprinkler system 11 starts, the control valve 15 (see Figure 7) opens, and water is sent into the dry piping 5. Next, water is discharged from the closed-type water-discharge head 61, and the nearest housing-type joint 9 is cooled by the liquid 75.

[0046] In the cooling system 1 for the housing-type joint, the cooling device 59 includes a closed-type water-discharge head 61 provided on the dry pipe 5 or the empty pipe 7. When a fire breaks out, the closed-type water-discharge head 61 is activated by heat, and the liquid that has flowed inside the dry pipe 5 or the empty pipe 7 is discharged from the closed-type water-discharge head 61 toward the housing-type joint 9.

[0047] As a result, even if a fire breaks out, the housing-type joint 9 installed in the dry pipe 5 or the empty pipe 7 is cooled by the liquid 75 discharged from the closed water-discharge head 61. This prevents the resin part (gasket) 51 of the housing-type joint 9 from melting and being damaged, and the airtightness of the housing-type joint 9 can be maintained. This allows the housing-type joint 9 to be used safely. Furthermore, the housing-type joint 9 can also be used in the dry pipe 5 or the empty pipe 7, improving workability.

[0048] It is possible to insulate the entire housing-type joint 9 with a heat insulating material to block heat and maintain the airtightness of the housing-type joint 9, but doing so would mean that the entire housing-type joint 9 would be covered with the heat insulating material. This would delay the discovery of any liquid leakage that occurs in the housing-type joint 9.

[0049] In contrast, in the housing-type joint cooling system 1, the housing-type joint 9 is not covered with a heat insulating material, and almost the entire housing-type joint 9 is exposed. This allows the housing-type joint 9 to be inspected visually, and any liquid leaks or other malfunctions in the housing-type joint 9 can be detected without delay.

[0050] Furthermore, in the cooling system 1 for the housing-type joint, the ratio of the value of the distance H between the floor surface 69 and the closed-type water-discharge head 61 in the vertical direction to the value of the distance between the closed-type water-discharge head 61 and the housing-type joint 9 in the horizontal direction is 0.18 or less. By setting it in this way, the housing-type joint 9 can be cooled more accurately.

[0051] That is, when a flame 73 rises on the floor surface 69, the ratio of the value of the distance X between the closed-type water-discharge head 61 and the housing-type joint 9 in the horizontal direction to the value of the distance between the flame 73 and the closed-type water-discharge head 61 in the vertical direction is sufficiently small. This allows the closed-type water-discharge head 61 to reliably capture the heat of the flame 73. Then, the closed-type water-discharge head 61 starts discharging water, and the discharged liquid material 75 falls accurately on the housing-type joint 9, cooling it.

[0052] Second Embodiment Next, a cooling system 1a for a housing-type joint according to a second embodiment will be described with reference to Fig. 3. The cooling system 1a for a housing-type joint is used to cool a housing-type joint 9 that is installed in and used with an empty pipe 7 of a fire extinguishing system. Note that the cooling system 1a for a housing-type joint may also be installed in and used with a dry pipe 5 or empty pipe 7 of another fire extinguishing system such as a dry sprinkler system 11.

[0053] The cooling system 1a for the housing-type joint is configured with a cooling device 59a. The metal dry pipe 5 and the metal empty pipe 7 are connected to the metal water-filled pipe 81 via an open valve (a simultaneous open valve; a water flow detection device described in JP 2021-156299 A).

[0054] The cooling device 59a includes a sensing head (e.g., a fire detection device) 83 provided on the open valve 79 and a water discharge head (e.g., a closed sprinkler head or an open sprinkler head) 85 provided on the dry piping 5 or the dry piping 7.

[0055] When a fire occurs, the heat activates the sensing head 83, opening the release valve 79 and allowing the liquid (water or aqueous solution) in the filled pipe 81 to flow into the dry pipe 5 and the empty pipe 7. The liquid that has flowed through the filled pipe 81 into the dry pipe 5 and the empty pipe 7 is discharged from the water discharge head 85 towards the housing-type joint 9, cooling the housing-type joint 9.

[0056] The sensing head 83 is installed above and away from the floor 69 of the room 67 of the building 65 (located near the ceiling surface 71). In the cooling device 59a as well, the ratio of the value of the distance X to the value of the distance (height) H is 0.18 or less. The distance H is the distance between the floor 69 and the sensing head 83 (for example, the center of the sensing head 83) in the vertical direction. The distance X is the distance between the sensing head 83 and the housing-type joint 9 (for example, the center of the housing-type joint 9) in the horizontal direction.

[0057] In the housing-type joint cooling system 1a, the sensing head 83 is connected to the open valve 79 via a pipe 87. The water discharge head 85 is connected to the dry pipe 5 or the empty pipe 7 via a tee 91 and a pipe 89. What is shown with reference numeral 73 in FIG. 3 is the flame of the fire, and what is shown with reference numeral 75 in FIG. 3 is the water (foam) discharged from the closed-type water discharge head 85.

[0058] Next, the operation of the housing-type joint cooling system 1a will be explained using a fire extinguishing system.

[0059] Under normal conditions when no fire is occurring, the empty pipe 7 is filled with air. When a fire occurs, the sensing head 83 detects the heat of the fire flame 73 and the like, and the sensing head 83 is activated.

[0060] Next, the sensing head 83 is activated to operate (open) the release valve 79, and the liquid (water or aqueous solution) in the filled pipe 81 flows into the empty pipe 7. Next, water is discharged from the water discharge head 85, and the nearest housing-type joint 9 is cooled by the liquid 75.

[0061] In the cooling system 1a for a housing-type joint, when a fire occurs, the sensing head 83 is activated by heat, which opens the release valve 79 and causes the liquid in the filled pipe 81 to flow into the empty pipe 7. Then, the liquid that has flowed through the empty pipe 7 is discharged from the water discharge head 85 toward the housing-type joint 9. This allows the airtightness of the housing-type joint 9 to be maintained, similar to the cooling system 1 for a housing-type joint according to the first embodiment.

[0062] Furthermore, in the housing-type joint cooling system 1a, the ratio of the value of the distance X to the value of the height H is 0.18 or less, so that the same effect as in the housing-type joint cooling system 1 is achieved.

[0063] Third Embodiment Next, a cooling system 1b for a housing-type joint according to a third embodiment will be described with reference to Fig. 4. The cooling system 1b for a housing-type joint cools a housing-type joint 9 used in a dry pipe 93 and an empty pipe 95 that are separate (in a different system) from the dry pipe 5 and the empty pipe 7. This is what makes it different from the cooling system 1a for a housing-type joint according to the second embodiment; in other respects, it is configured in the same way as the cooling system 1a for a housing-type joint, and produces almost the same effects.

[0064] [Fourth embodiment] Next, a cooling system 1c for a housing-type joint according to a fourth embodiment will be described with reference to Fig. 5. The cooling system 1c for a housing-type joint is used to cool a housing-type joint 9 that is installed in and used with an empty pipe 7 of a fire extinguishing system. Note that the cooling system 1c for a housing-type joint may also be installed in and used with a dry pipe 5 or empty pipe 7 of another fire extinguishing system such as a dry sprinkler system 11.

[0065] The cooling system 1c for the housing-type joint is configured with a cooling device 59c. The metal dry pipe 5 and the metal empty pipe 7 are connected to the metal filled pipe 81 via an open valve (simultaneous open valve; a water flow detection device described in JP 2021-156299 A) 79.

[0066] The cooling device 59c includes a sensing head (for example, a heat-sensitive release joint; an open valve with a built-in sensing unit) 83a and a water discharge head (open sprinkler head) 85, which are provided on the water filling pipe 81. When a fire breaks out, the heat-sensitive release joint 83a is activated by heat, causing the liquid (water or aqueous solution) in the water filling pipe 81 to be discharged from the water discharge head 85 toward the housing-type joint 9, thereby cooling the housing-type joint 9.

[0067] The heat-sensitive release joint 83a is installed above and away from the floor 69 of the room 67 of the building 65 (located near the ceiling surface 71). In the cooling device 59c as well, the ratio of the value of the distance X to the value of the distance (height) H is 0.18 or less. The distance H is the distance between the floor 69 and the heat-sensitive release joint 83a (for example, the center of the heat-sensitive release joint 83a) in the vertical direction. The distance X is the distance between the heat-sensitive release joint 83a and the housing-type joint 9 (for example, the center of the housing-type joint 9) in the horizontal direction.

[0068] In the housing-type joint cooling system 1c, the heat-sensitive release joint 83a and the water discharge head 85 are connected to the water filling pipe 81 via a tee 99 and a pipe 97. Reference numeral 73 in FIG. 5 indicates the flame of the fire, and reference numeral 75 in FIG. 5 indicates the liquid discharged from the closed-type water discharge head 85.

[0069] Next, the operation of the housing-type joint cooling system 1c will be explained using a fire extinguishing system.

[0070] Under normal conditions when no fire is occurring, the empty pipe 7 is filled with air. When a fire occurs, the heat-sensitive release joint 83a detects the heat of the fire flames 73 and activates. Next, water is discharged from the water-discharge head 85, and the nearest housing-type joint 9 is cooled by the liquid material 75.

[0071] Subsequently, the open valve 79 is actuated (opened) by the actuation of a sensing head (not shown), and the liquid (water or aqueous solution) in the fill pipe 81 flows into the empty pipe 7 .

[0072] In the cooling system 1c for a housing-type joint, when a fire occurs, the heat-sensitive release joint 83a is activated by heat, and the liquid in the water filling pipe 81 is discharged from the water discharge head 85 toward the housing-type joint 9. This allows the airtightness of the housing-type joint 9 to be maintained, similar to the cooling system 1 for a housing-type joint according to the first embodiment.

[0073] Furthermore, in the housing-type joint cooling system 1c, the ratio of the value of the distance X to the value of the height H is 0.18 or less, so that the same effect as in the housing-type joint cooling system 1 is achieved.

[0074] Fifth Embodiment Next, a cooling system 1d for a housing-type joint according to a fifth embodiment will be described with reference to Fig. 6. The cooling system 1d for a housing-type joint is used to cool a housing-type joint 9 that is installed in and used on the dry piping 5 of a dry sprinkler system 11 or the dry piping 5 of a pre-action sprinkler system 29. The cooling system 1d for a housing-type joint may also be installed in and used on the empty piping 7 of a foam fire extinguishing system.

[0075] The cooling system 1d for a housing-type joint is configured to include a cooling device 59d. The cooling device 59d includes a cooling liquid container 101 containing a cooling liquid, a cooling pipe 103 extending from the cooling liquid container 101, and a closed water discharge head 105 provided on the cooling pipe 103. The cooling liquid in the cooling liquid container 101 is pressurized.

[0076] When a fire breaks out, the closed-type water-discharge head 105 is activated by heat, and the cooling liquid (for example, water) stored in the cooling liquid container 101 and flowing through the cooling pipe 103 is discharged from the closed-type water-discharge head 105 toward the housing-type joint 9. This cools the housing-type joint 9.

[0077] In the cooling device 59d, the closed-type water-discharge head 105 is installed above the floor surface 69 (away from the floor surface 69) of the room 67 of the building 65 (located near the ceiling surface 71), and the ratio of the value of the distance X to the value of the distance (height) H is 0.18 or less. The distance H is the distance between the floor surface 69 and the closed-type water-discharge head 105 (for example, the center of the closed-type water-discharge head 105) in the vertical direction. The distance X is the distance between the closed-type water-discharge head 105 and the housing-type joint 9 (for example, the center of the housing-type joint 9) in the horizontal direction.

[0078] 6 indicates a fire flame, and reference numeral 75 indicates a liquid discharged from the closed-type water-discharge head 105. In FIG.

[0079] Next, the operation of the housing-type joint cooling system 1d will be described.

[0080] Under normal conditions when no fire has occurred, the closed-type water-discharge head 105 is closed. When a fire occurs, the closed-type water-discharge head 105 is activated (opened) by the heat of the fire flames 73, etc. Then, water is discharged from the closed-type water-discharge head 105, and the nearest housing-type joint 9 is cooled by the liquid material 75.

[0081] In the cooling system 1d for a housing-type joint, when a fire occurs, the closed-type water-discharge head 105 is activated by heat, and the cooling liquid stored in the cooling liquid-containing container 101 is discharged from the closed-type water-discharge head 105 toward the housing-type joint 9. This allows the airtightness of the housing-type joint 9 to be maintained, similar to the cooling system 1 for a housing-type joint according to the first embodiment.

[0082] Furthermore, in the housing type joint cooling system 1d, the ratio of the value of the distance X to the value of the height H is 0.18 or less, so that the same effect as in the housing type joint cooling system 1 is achieved.

[0083] In addition, in the cooling system 1d for a housing-type joint, a sensing head 83 may be provided, as in the cooling system 1a for a housing-type joint shown in Figure 3, and water may be discharged from the water-discharge head by operating the sensing head 83.

[0084] Furthermore, the above-mentioned cooling system for a housing-type joint is an example of a cooling system for a housing-type joint that includes a housing-type joint that is installed in the dry piping or empty piping of a fire extinguishing equipment and used as a piping joint, and a cooling device that cools the housing-type joint using a liquid (a portion of the liquid flowing through the piping of the fire extinguishing equipment, or a liquid other than the liquid flowing through the piping of the fire extinguishing equipment; water or foam in a foam fire extinguishing equipment) when the temperature of the housing-type joint reaches a predetermined temperature, in order to prevent the sealing function of the housing-type joint from being impaired at high temperatures due to exposure of the housing-type joint to a high-temperature environment due to a fire or the like.

[0085] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment. [Explanation of symbols]

[0086] 1, 1a, 1b, 1c, 1d Housing type joint cooling system 3 Fire extinguishing equipment 5. Dry Piping 7 Empty piping 9 Housing type coupling 11 Dry sprinkler system 29 Pre-action sprinkler system 59, 59a, 59b, 59c, 59d Cooling device 61 Closed type water discharge head 65 Building 69 Floor 79 Release valve 81 Water filling piping 83 Sensing Head 83a Heat-sensitive release joint 85 Water discharge head 101 Cooling liquid container 105 Closed type water discharge head H Distance between floor and closed discharge head X Distance between closed discharge head and housing type joint

Claims

1. A housing-type joint equipped with a gasket and installed in a dry piping or an empty piping of a fire extinguishing system, a cooling device that cools the housing-type joint using a liquid to prevent the gasket from melting under high temperatures and to prevent the sealing function of the housing-type joint from being impaired; A cooling system for a housing-type joint having a

2. A housing-type joint installed in the dry piping of a dry sprinkler system, the dry piping of a pre-action sprinkler system, or the dry piping of a fire extinguishing system; a cooling device for cooling the housing-type joint; and The cooling device is provided with a closed-type water discharge head provided on the dry pipe or the empty pipe, and is configured so that when a fire occurs, the closed-type water discharge head is activated by heat, and the liquid that has flowed through the dry pipe or the empty pipe is discharged from the closed-type water discharge head toward the housing-type joint.

3. A housing-type joint installed in the dry piping of a dry sprinkler system, the dry piping of a pre-action sprinkler system, or the dry piping of a fire extinguishing system; a cooling device for cooling the housing-type joint; and The cooling device is provided with a cooling liquid container containing a cooling liquid and a closed-type water discharge head, and is configured so that when a fire occurs, the closed-type water discharge head is activated by heat, causing the cooling liquid stored in the cooling liquid container to be discharged from the closed-type water discharge head toward the housing-type joint.

4. The closed-type water-discharge head is installed above the floor of a building, and the ratio of the distance between the closed-type water-discharge head and the housing-type joint in the horizontal direction to the distance between the floor and the closed-type water-discharge head in the vertical direction is 0.18 or less. A cooling system for a housing-type joint according to claim 2 or 3.

5. A housing-type joint installed in the dry piping of a dry sprinkler system, the dry piping of a pre-action sprinkler system, or the dry piping of a fire extinguishing system; a cooling device for cooling the housing-type joint; and The dry pipe and the empty pipe are connected to the filled pipe via an open valve, The cooling device is equipped with a sensing head provided on the open valve and a water discharge head provided on the dry piping, and when a fire occurs, the sensing head is activated by heat, causing the open valve to open and liquid in the filled piping to flow into the dry piping and the empty piping, and the flowing liquid is then discharged from the water discharge head toward the housing-type joint. This is a cooling system for a housing-type joint.

6. A cooling system for a housing-type joint as described in claim 5, wherein the sensing head is installed above the floor of a building, and the ratio of the value of the distance between the sensing head and the housing-type joint in the horizontal direction to the value of the distance between the floor and the sensing head in the vertical direction is 0.18 or less.

7. A housing-type joint installed in the dry piping of a dry sprinkler system, the dry piping of a pre-action sprinkler system, or the dry piping of a fire extinguishing system; a cooling device for cooling the housing-type joint; and The dry pipe and the empty pipe are connected to the filled pipe via an open valve; The cooling device is a cooling system for a housing-type joint that is configured to include a heat-sensitive release joint and a water discharge head that are provided on the water filling pipe, and when a fire occurs, the heat-sensitive release joint is activated by the heat, causing the liquid in the water filling pipe to be discharged from the water discharge head toward the housing-type joint.

8. 8. A cooling system for a housing-type joint as described in claim 7, wherein the heat-sensitive release joint is installed above the floor of a building, and the ratio of the value of the distance between the heat-sensitive release joint and the housing-type joint in the horizontal direction to the value of the distance between the floor and the heat-sensitive release joint in the vertical direction is 0.18 or less.

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