JP2016165378A - Sprinkler head coupler joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head coupler joint, even when a travel distance of a valve element is long, preventing the length of a valve shaft from being restricted and preventing the valve element from obstructing running water.SOLUTION: The sprinkler head coupler joint includes: a body 10 being cylindrical, one end side 11 of which is connected to a water supply pipe, and that includes a thermosensitive decomposition part 40 formed at the other end side 12; an outflow port 30 formed at an intermediate part of the body part 10; and a valve element 20 that closes between the one end side 11 and the outflow port 30 and is opened by actuation of the thermosensitive decomposition part 40. The thermosensitive decomposition part 40 is locked by a step part 53 provided inside the other end side 12 of the body 10. A holding member for holding the thermosensitive decomposition part 40 at the step part 53 and holding the valve element 20 at a closure position is provided between the valve element 20 and the thermosensitive decomposition part 40.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joint connected to a fire-extinguishing equipment pipe, and relates to a sprinkler head connection joint in which a sprinkler head is connected to an outlet of the joint.

In the sprinkler facility, sprinkler heads are installed at predetermined intervals on or near the ceiling. However, when there is an obstacle such as a duct below the place where the sprinkler head is installed, the duct may interfere with water spraying. For example, there is a case where the sprinkler head fitting described in Patent Document 1 is used in such a place.

The sprinkler head fixture described in Patent Document 1 has a main body having a pipe connection port at one end, a heat-sensitive part mounting port installed at the other end, and a head connection port formed between the two ends. A valve body that closes the space between the provided pipe connection port and the head connection port is provided. The attachment port is provided with a heat sensitive part that supports the valve body in a normally closed state and is opened by heat sensitivity in the event of a fire. An open sprinkler head disposed below the duct is connected to the head connection port.

In Patent Document 1, a valve rod portion, a ball, and a glass bulb receiver are interposed between a glass valve of a heat sensitive portion and a valve portion of a valve body, and are arranged in a straight line. When the glass bulb ruptures due to the heat of the fire, the valve element moves to the set screw side that is screwed to the tip of the frame that supported one end of the glass bulb. The valve unit collides with the end face of the guide installed in the main unit to release the flow path inside the main unit, water is supplied from the pipe connection port to the head connection port, and from the open sprinkler head connected to the head connection port Water is sprayed down the duct.

Japanese Patent Laid-Open No. 10-108917

In the sprinkler head mounting tool described in Patent Document 1, the valve body is held in the closed position by a set screw holding one end of the glass bulb and a frame in which the set screw is screwed. Specifically, the water pressure filled in the pipe connection port acts on the valve part, and the force is applied to the set screw and frame through the valve stem part, ball glass bulb receiver, and glass valve. Has been. The set screw and the frame hold the valve body, the glass valve and the mediating member against the above-described force caused by the water pressure.

A ball or glass bulb receiver is interposed between the valve body and the glass valve as an intermediary member. However, if the intermediary member is omitted by extending the valve stem portion to the vicinity of the glass valve, the valve stem portion is opened when the valve body is opened. The tip of the cylinder collides with the set screw and cannot move any further, and the valve portion moored inside the main body may become resistance to running water. For this reason, a ball or glass bulb holder is interposed between the valve stem portion and the glass bulb, and the valve body can be moved to the end face of the guide by releasing the ball or glass bulb holder to the outside during operation.

In view of the above problems, an object of the present invention is to provide a sprinkler head connection joint in which the length of the valve stem portion is not limited even when the moving distance of the valve body is long, and the valve body does not hinder running water. And

In order to achieve the above object, the present invention provides the following sprinkler head joint.
That is, it has a cylindrical shape, one end is connected to the water supply pipe, the other end is provided with a main body provided with a thermal decomposition part, an outlet formed in the middle of the main body, and between the one end and the outlet. And a valve body that is opened by the operation of the thermal decomposition part.The thermal decomposition part is locked to a step provided inside the other end of the main body, and the thermal decomposition part is And a holding member for holding the valve body in the closed position is provided between the valve body and the thermal decomposition section.

According to the present invention, when the holding member is constituted by the saddle installed between the valve body and the thermal decomposition part and the screw that is screwed with the female screw at the center of the saddle, the screw tip is moved to the valve body side to move the screw. The front end presses and holds the valve body against the valve seat, and the edge of the saddle presses and holds the thermal decomposition portion on the step portion of the main body. Most of the thermal decomposition part protrudes from the other end side of the main body to the outside, and when the thermal decomposition part is activated by the heat of the fire, the components of the thermal decomposition part fall off without being moored to the main body. Since the saddle and screw are also pushed out of the main body by the movement of the valve body and there is no member that obstructs the movement in the direction of movement of the valve body, the valve body surely moves to the other end of the main body and moves to one end of the main body. Water can be supplied from the side to the outlet.

The holding member includes a saddle installed between the valve body and the thermal decomposition part, and a cylindrical frame that is screwed and connected to the other end of the main body in which a step portion in which the thermal decomposition part is locked is formed. It is also possible to configure. In this case, by screwing the main body and the frame, the edge of the saddle presses and holds the thermal decomposition portion to the stepped portion, and the valve body in contact with the saddle can be pressed and held on the valve seat.

In the above configuration, when a rod whose tip extends to the vicinity of the saddle is provided on the surface opposite to the valve seat contact surface of the valve body, it is easy to directly contact the screw or saddle with the tip of the rod.

Furthermore, if the thermal decomposition part of the above sprinkler connection joint is connected to the fire extinguishing equipment piping facing the ceiling side, the thermal airflow at the time of fire stays near the ceiling, making it easier for the thermal decomposition part to collect heat and fire. The thermal decomposition unit can operate at an early stage.

In addition, by installing a heat collector composed of a thin metal plate at the tip of the thermal decomposition part, the heat collected by the heat collector can be propagated to the thermal decomposition part to promote the operation of the thermal decomposition part. In addition to this, the shape of the heat collector extends to the ceiling, and the surface of the heat collector is drilled to increase the surface area of the heat collector to collect more heat from the fire. Can do.

According to the present invention, the thermal decomposition part is locked to the step formed inside the other end of the main body, and the components of the thermal decomposition part that has been disassembled are released to the outside without being anchored to the main body. Therefore, the valve body and the member engaged with the valve body can be reliably moved to the other end side of the main body. Accordingly, it is possible to provide a sprinkler head connection joint in which the valve body does not interfere with running water when the valve body is opened.

Sectional drawing of the sprinkler head connection coupling of 1st Embodiment. The system diagram of the sprinkler installation in which the sprinkler head connection joint of FIG. 1 was installed. Sectional drawing of a thermal decomposition part. The state before the load application in FIG. A state in which a guard is installed on the sprinkler head connection joint of FIG. The operating state of the sprinkler head connection joint of FIG. The top view of the part in which the sprinkler head connection coupling of FIG. 2 was installed. Sectional drawing of the sprinkler head connection coupling of 2nd Embodiment.

1st Embodiment (FIGS. 1-7)
The sprinkler head connection joint T1 shown in FIG. 1 includes a main body 10, a valve body 20, an outlet 30 and a thermal decomposition unit 40.

The sprinkler head connection joint T1 is installed in the sprinkler facility shown in FIG. The main body 10 of the sprinkler head connection joint T1 has a cylindrical shape, one end side 11 is connected to the pipe P1, and the other end side 12 has a thermal decomposition part 40 incorporated therein. An outlet 30 is formed between the one end 11 and the other end 12, and an open sprinkler head S <b> 2 is connected to the outlet 30 via a pipe 31.

A ring-shaped valve seat 13 is formed between one end side 11 of the main body 10 and the outlet 30. Although the inside of the valve seat 13 is a flow passage, the valve body 20 is seated on the surface of the other end side 12 of the valve seat 13 to block the flow passage.

The valve body 20 includes a disk-shaped disk 21 that closes the flow path between the one end side 11 connected to the pipe P1 and the outlet 30, and a rod-shaped rod is provided on the surface of the disk 21 that faces the thermal decomposition portion 40. 22 is installed. A hole 23 is formed at the tip of the rod 22, and the tip of a screw 51 described later is inserted into the hole 23.

The thermal decomposition unit 40 includes a set screw 41, a lever 42, a support plate 43, a balancer 44, a cylinder 45, a plunger 46, and a low melting point alloy 47. Since the thermal decomposition unit 40 has the same configuration as the “thermal decomposition unit” described in International Publication No. 2011/125169, detailed description thereof is omitted. The thermal decomposition unit 40 is assembled in advance in the unit state shown in FIG.

In FIG. 3, the cylinder 45 is provided with two heat collectors 48A and 48B formed of a thin metal plate. The heat collectors 48A and 48B are fixed to the bottom surface of the cylinder 45 in a stacked state. The peripheral portions of the heat collectors 48A and 48B are formed so as to be separated from each other, and the heat collector 48B has a slope portion formed in a tapered shape from the central portion toward the peripheral portion. A plurality of holes (not shown) are formed in the slope portion.

A cylindrical frame 52 is installed between the lever 42 of the thermal decomposition unit 40 and the other end side 12 of the main body 10. The lower end of the frame 52 is connected to the other end 12 of the main body 10, and a pair of stepped portions 53 are formed on the inner surface of the upper end of the frame 52.

A saddle 54 is accommodated in the frame 52. The saddle 54 is U-shaped in cross section and has two standing portions 54A. The surface between the two standing portions 54A is a contact surface with the lever 42, and a female screw is formed at the center of the contact surface with the lever 42. The female screw is accommodated in the frame 52 in a state where the screw 51 is screwed in advance. In FIG. 1, the tip of the standing portion 54 </ b> A of the saddle 54 protrudes from the frame 52 to the outside.

The saddle 54 and the screw 51 act as a “holding member” that holds the thermal decomposition portion 40 at the stepped portion and holds the valve body 20 in the closed position. After the saddle 45 is accommodated in the frame 52, the lever 42 of the thermal decomposition unit 40 is locked to the stepped portion 53 of the frame 52.

The thermal decomposition unit 40 inserts the curved portion 42 a of the lever 42 into the frame 52 while avoiding the stepped portion 53 of the frame 52 with the unit shown in FIG. 3 turned upside down. When the thermal decomposition unit 40 is rotated so that the tip 42b of the lever 42 comes to the position of the stepped portion 53 of the frame 52 with the curved portion 42a of the lever 42 in contact with the edge of the saddle 54, the state shown in FIG. Become.

From the state of FIG. 4, the tool illustrated by the dotted line is inserted into the through hole 41 a of the set screw 41, and the screw 51 and the tool are engaged to rotate. Then, the saddle 54 moves to the levers 42, 42 side (upper side in the drawing), and the tip 42 b of the lever 42 presses the stepped portion 53.

Further, the screw 51 moves to the rod 22 side (lower side in the figure), and the screw 51 presses the disc 21 against the valve seat 13 via the rod 22. As a result, the saddle 54 is elastically deformed downward in the drawing at the edge contacting the levers 42 and 42, and is elastically deformed upward in the drawing near the center where the screw 51 is screwed.

On the other hand, the intermediate portion of the step portion 53 pressed by the tip 42b of the lever 42 is elastically deformed upward in the drawing. The load which closes the valve body 20 is provided using the elastic force of these members. In this embodiment, an opening 55 is formed on the peripheral surface of the frame 52 where the step portion 53 is formed, and the step portion 53 is configured to be easily elastically deformed by the opening 55. Using the elastic force of the saddle 54 and the frame 52, the thermal decomposition unit 40 is held at the stepped portion, and the valve body 20 is held at the closed position.

A stopper 56 is installed between the frame 52 and the other end 12 of the main body 10. A through hole 57 is formed at the center of the stopper 56, and the tip of the rod 22 is inserted through the through hole 57 in a state of protruding toward the thermal decomposition unit 40. When the valve body 20 is opened and moved to the thermal decomposition unit 40 side, the disk 21 collides with the stopper 56 to prevent the valve body 20 from moving, so that the valve body 20 does not jump out of the main body 10. Further, since the valve body 20 moves to the other end side 12 of the main body 10, the water flow flowing from the one end side 11 to the outlet 30 is not hindered.

The through hole 57 supports the shaft of the rod 22 and the shaft of the screw 51 so as to be arranged in a straight line when the screw 51 is rotated to press the disk 22 against the valve seat 13. As a result, the rod 22 is prevented from being eccentric in the main body 10, and the force applied from the screw 51 acts uniformly on the disk 21.

The sprinkler head connection joint T1 shown in FIG. 5 is provided with a guard G so as to cover the thermal decomposition part 40. At the upper end of the guard G, a ring G1 having an inner diameter larger than the outer diameter of the frame 52 is provided. A plurality of pillars G2 extending from the ring G1 in the direction of the frame 52 are formed, and the thermal decomposition part 40 is protected by the ring G1 and the pillars G2. The lower end of the column part G2 is connected to the cylindrical part G3, and the inner surface of the cylindrical part G3 and the outer peripheral surface of the other end 12 of the main body 10 are engaged and connected. The guard G protects the thermal decomposition unit 40 from external force.

Then, operation | movement of the sprinkler head connection coupling T1 of 1st Embodiment is demonstrated.

As shown in FIG. 2, the sprinkler connection joint T <b> 1 is installed in a pipe P <b> 1 connected in the direction of the ceiling C from the pipe P where the closed sprinkler head S <b> 1 is installed at a predetermined interval. The duct D is arranged below the pipe P1, the sprinkler connection joint T1 is installed near the ceiling C above the duct D, and the outlet 30 is an opening arranged below the duct D via the pipe 31. A mold sprinkler head S2 is connected.

When a fire occurs, the heat of the fire stays near the lower surface of the ceiling C. Then, the heat collectors 48 </ b> A and 48 </ b> B of the thermal decomposition part 40 of the sprinkler connection joint T <b> 1 collect the heat of the fire and transmit the heat to the low melting point alloy 47 accommodated in the cylinder 45. The low melting point alloy 47 is melted by the heat of the fire, and the melted low melting point alloy 47 flows out through the gap between the cylinder 45 and the plunger 46. When the plunger 46 moves to the bottom surface side of the cylinder 45, the balance of the force of the components of the thermal decomposition unit 40 is lost and the decomposition operation is performed. The levers 42 and 42 are engaged with the stepped portion 53 of the frame 52. 42b is rotated around the fulcrum and released to the outside.

By the decomposition operation of the thermal decomposition unit 40, the valve body 20 is released from the holding state, and moves in the direction of the other end 12 by the pressure of water filled in the one end 11. The saddle 54 disposed between the thermal decomposition unit 40 and the valve body 20 and the screw 51 screwed into the saddle 54 move together with the valve body 20 and are pushed out of the frame 52. Since there is nothing that obstructs the movement of the rod 22 in the moving direction of the valve body 20 when the valve body 20 moves, the length of the rod 22 is not limited and the tip side protrudes outside the frame 52.

When the valve body 20 moves while the screw 51 is engaged with the hole 23 at the tip of the rod 22, the screw 51 and the saddle 54 can be pushed out of the frame 52. Then, the disk 21 of the valve body 20 comes into contact with the stopper 56 and the movement stops.

When the valve body 20 is moved and opened, water is supplied from the pipe P1 to the open sprinkler head S2 through the flowing water port 30, and water is sprayed below the duct D to stop the fire.

When the sprinkler head connection joint T1 described above is installed near the lower surface of the ceiling C from the thermal decomposition unit 40, heat from the fire stays on the lower surface of the ceiling C, so the thermal decomposition unit 40 installed near the lower surface of the ceiling C It can be configured to operate easily in response to heat. More specifically, it arrange | positions so that the distance from the thermal decomposition part 40 to the lower surface of the ceiling C may be 0.3 m or less.

FIG. 7 shows a plan view of a portion where the sprinkler head connection joint T1 is installed, with respect to the fire extinguishing equipment of FIG. 2 in which the sprinkler head connection joint T1 is installed. A circle drawn with a dotted line represents the watering range of the closed sprinkler head S1 and the open sprinkler head S2. Sprinkling areas drawn with dotted lines overlap each other and are arranged so that there is no gap. In the closed sprinkler head S1, the watering range and the fire detection range are the same.

On the other hand, the fire detection range of the sprinkler head connection joint T1 is indicated by a circle drawn with a two-dot chain line. The sprinkler range of the open sprinkler head S2 connected to the outlet 30 of the sprinkler head connection joint T1 is smaller than the circle drawn by the two-dot chain line. The fire detection range of the sprinkler head connection joint T1 corresponds to a wider range compared to the fire detection range of the closed sprinkler head S1 installed in the surroundings.

By including the sprinkler range of the open sprinkler head S2 within the fire detection range of the sprinkler head connection joint T1 when there is a difference in the distance L between the axis of the sprinkler head connection joint T1 and the axis of the open sprinkler head S2. The open-type sprinkler head S2 can obtain a fire detection performance equivalent to or higher than that of the closed-type sprinkler head S1 disposed around the open-type sprinkler head S2. That is, the start of sprinkling of the open sprinkler head S2 is not delayed from the operation of the surrounding closed sprinkler head S1 due to the difference in the distance L between the fire detection section (thermal decomposition section 40) and the sprinkling section (open sprinkler head S2). I am doing so.

When the sensitivity test defined by the Ministerial Ordinance is carried out, the time from the start of the test until the thermal decomposition part is disassembled is faster for the sprinkler head connection joint T1 than for the closed sprinkler head S1.

As one means for improving the fire detection performance, when the operating temperature of the sprinkler head connecting joint T1 and the operating temperature of the surrounding closed type sprinkler head S1 are substantially equal, the sprinkler head connecting joint T1 is operated first. As described above, the distance between the ceiling and the heat collector 48B is set to 0.3 m or less, or the cylinder 45 in which the heat collectors 48A and 48B and the low melting point alloy 47 are accommodated is exposed from the main body 10 to the outside. The fire detection performance of the sprinkler head connection joint T1 is improved.

Although the two heat collectors 48A and 48B are installed in the sprinkler head connection joint T1, it is possible to improve the fire detection performance by increasing the number of installed heat collectors and the surface area.

As a modification of the first embodiment described above, the frame 52 can be integrally formed on the other end side 12 of the main body 10. Thereby, downsizing and reduction of manufacturing cost can be achieved. Further, as a modified example different from the above, a plurality of outlets 30 can be installed in the main body 10.

Second Embodiment (FIG. 8)
Next, the sprinkler head connection joint T2 of 2nd Embodiment is demonstrated with reference to FIG. In addition, about the location which has the same structure as 1st Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. The sprinkler head connection joint T2 of the second embodiment shown in FIG. 8 has a configuration in which the screw 51 of the sprinkler head connection joint T1 of the first embodiment is deleted.

The saddle 61 of the second embodiment is U-shaped in cross section and has two standing portions 61A. A surface between the standing portions 61 </ b> A and 61 </ b> A is a contact surface with the lever 42. The rod 62 is in contact with the surface opposite to the contact surface with the lever 42.

The tip of the rod 62 is processed into a spherical shape, and a mortar-shaped recess 63 is formed in the saddle 61 at a portion where the rod 62 contacts. The other end of the rod 62 is connected and fixed to the disk 21.

A stopper 64 provided inside the main body 10 is installed by screwing into a male screw formed on the outer peripheral surface of the stopper 64 and a female screw formed inside the main body 10. A rod 62 is inserted into the through hole 65 of the stopper 64.

In FIG. 8, the male screw formed at the lower end of the frame 52 is screwed with a female screw formed at the other end 12 of the main body 10, and these screws are screwed through the saddle 61. The tip 42 b of the lever 42 presses the stepped portion 53. The rod 62 is pressed by the saddle 61 and presses the disc 21 against the valve seat 13. As a result, the saddle 61 is elastically deformed in the downward direction in the drawing at the edge portion in contact with the levers 42 and 42, and is elastically deformed in the upward direction in the drawing in the vicinity of the center in contact with the rod 62.

Further, the step portion 53 is also elastically deformed similarly to the first embodiment. Using these elastic forces, the thermal decomposition part 40 is held at the step part and the valve body 20 is held at the closed position.

Since the operation of the sprinkler head connection joint T2 of the second embodiment is the same as that of the first embodiment, description thereof is omitted.

T1, T2 Sprinkler head connection joint S1 Closed sprinkler head S2 Open sprinkler head 10 Main body 13 Valve seat 20 Valve body 21 Disc 22 Rod 30 Outlet 40 Thermal decomposition part 42 Lever 45 Cylinder 46 Plunger 47 Low melting point alloy 48A, 48B Heat collector 51 Screw 52 Frame 54 Saddle 56 Stopper C Ceiling D Duct P, P1 Piping

Claims (12)

It is cylindrical and one end is connected to the water supply pipe, and the other end is provided with a main body provided with a thermal decomposition part,
An outlet formed in the middle of the body,
It is provided with a valve body that closes between the one end side and the outlet and is opened by the operation of the thermal decomposition section,
The thermal decomposition part is locked to the step provided inside the other end of the main body,
A sprinkler head connection joint comprising a holding member for holding the thermal decomposition portion at the step portion and holding the valve body at the closed position between the valve body and the thermal decomposition portion. The sprinkler head connection joint according to claim 1, wherein the holding member includes a saddle installed between the valve body and the thermal decomposition portion and a screw that is screwed to the saddle and presses the valve body. The holding member is composed of a saddle installed between the valve body and the thermal decomposition part, and a cylindrical frame that is screwed and connected to the other end of the main body in which a step part in which the thermal decomposition part is locked is formed. The sprinkler head connection joint according to claim 1 or 2. The sprinkler head connection joint according to any one of claims 1 to 3, wherein the valve body includes a rod having a tip extending to the vicinity of the saddle on a surface opposite to the valve seat contact surface. The sprinkler head connection joint according to any one of claims 1 to 4, wherein the tip of the rod moves to a position protruding from the other end of the main body when the valve body is opened. The sprinkler head connection joint according to any one of claims 1 to 5, wherein the thermal decomposition portion is disposed toward the ceiling side. The sprinkler head connection joint according to any one of claims 1 to 6, wherein a heat collector is installed at a tip of the thermal decomposition portion. The sprinkler head connection joint according to any one of claims 1 to 7, wherein the heat collector extends in a direction of the ceiling. The sprinkler head connection joint according to any one of claims 1 to 8, wherein the thermal decomposition portion is provided with a hole leading to a tool engagement portion of the screw. The sprinkler head connection joint according to any one of claims 1 to 9, wherein a stopper for restricting the opening movement distance of the valve body is installed inside the main body. The sprinkler head connection joint according to any one of claims 1 to 10, wherein a tip of the rod is installed through the stopper. The heat-sensitive decomposition part comprises a pair of levers, the tip of the lever is engaged with a step on the other end of the main body, and is released to the outside of the main body together with the holding member during the decomposition operation. A sprinkler head connection joint according to any one of the preceding claims.

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