WO2020225948A1

WO2020225948A1 - Sprinkler head

Info

Publication number: WO2020225948A1
Application number: PCT/JP2020/003081
Authority: WO
Inventors: 雅春千葉; 義輝佐々木
Original assignee: 千住スプリンクラー株式会社
Priority date: 2019-05-07
Filing date: 2020-01-29
Publication date: 2020-11-12

Abstract

[Problem] To prevent lodgment during an operation of a sprinkler head. [Solution] The present invention comprises: a main body 1 provided therein with a nozzle 12 connected to a water supply pipe; a valve 3 for closing the nozzle 12 in normal time; a pair of frames 14 extending in the water discharge direction of the nozzle 12 from the main body 1; a deflector 2 installed on the tip of the frame 14, the tip being coupled onto the extension of the nozzle center axis A; and a thermosensitive actuating part 4 installed between the valve 3 and the deflector 2, wherein the thermosensitive actuating part 4 includes a link 41 formed by coupling two sheets of metal plate 44 with a fusible alloy, a lever 43 and a post 42 which are engaged with the link 41, one end of the post 42 is disposed on the valve 3, the other end of the post 42 is engaged with the lever 43, the lever 43 has a protruding section 50 in the vicinity of the engagement section with the post 42, and the protruding section 50 collides with the post 42 by a rotary movement of the lever 43 during an operation of the thermosensitive actuating part 4.

Description

Sprinkler head

The present invention relates to a sprinkler head for fire extinguishing.

The sprinkler system is installed in the building and detects the heat of the fire and automatically operates to sprinkle water to extinguish the fire. The sprinkler head has a nozzle inside, and the nozzle is connected to the pipe leading to the water supply source, and the nozzle is always in a closed state. When a fire breaks out and the sprinkler head is activated by heat, the nozzle is opened and the water filled in the pipe is discharged from the nozzle. The sprinkler head is equipped with a deflector that scatters water in all directions on the extension of the outlet of the nozzle, and the water that collides with the deflector is sprayed within a predetermined range to suppress and extinguish the fire.

There is a frame type sprinkler head as an example of the configuration of the sprinkler head. The frame-type sprinkler head has a horseshoe-shaped frame installed in the water discharge direction of the main body that has a nozzle inside, and a deflector that collides the water discharged from the nozzle and scatters it in all directions is installed at the tip of the frame. ..

A valve that always closes the nozzle is installed between the nozzle and the deflector, and the valve is supported by the heat-sensitive actuating part. It is widely known that the heat-sensitive actuating part uses a glass valve or a soluble alloy (low melting point alloy). When the heat-sensitive actuating part is operated by the heat of a fire, a phenomenon (lodgement) occurs in which the components and valves of the heat-sensitive actuating part are rarely moored to the deflector due to the water flow of the nozzle.

To prevent lodgement, there is a sprinkler head with a spring that urges the valve to deviate from the water flow direction. (See, for example, Patent Document 1.).

Japanese Unexamined Patent Publication No. 2006-346497

In the sprinkler head equipped with the above spring, both ends of the V-shaped spring are locked to the frame, and the intermediate bent portion is locked to the side surface of the valve. When the heat-sensitive actuating part operates and the valve is opened, the valve deviates from the water discharge direction of the nozzle by the action of the spring and is discharged to the outside.

When installing the above spring on the sprinkler head, before incorporating the heat-sensitive actuating part into the main body, pinch both ends of the spring and displace it so that both ends come close to each other, and lock the valve in the middle part of the spring. Install on the main body. However, the valve is urged by the spring in a direction deviating from the axis of the nozzle, and it is difficult to incorporate the heat-sensitive actuating portion on the valve.

Alternatively, when installing the spring after incorporating the valve and the heat-sensitive actuating part into the main body, detailed work is required to pass the end of the spring between the valve and the frame. In addition, at that time, it is necessary to pay close attention not to give an impact to the heat-sensitive operating part.

Therefore, in view of the above problems, it is an object of the present invention to provide a sprinkler head that can be easily assembled while preventing lodge during operation of the sprinkler head.

To achieve the above object, the present invention provides the following sprinkler heads.
That is, a main body having a nozzle connected to a water supply pipe inside, a valve that constantly closes the nozzle, a pair of frames extending from the main body in the water discharge direction of the nozzle, and the tip of the frame are the above. It is coupled on the central axis of the nozzle and includes a deflector installed at the tip of the deflector and a heat-sensitive actuating portion installed between the valve and the deflector, and the heat-sensitive actuating portion is made of two pieces of metal. It includes a link in which plates are bonded with a soluble alloy, a lever and a strut engaged with the link, one end of the strut resting on the valve and the other end engaging the lever. The lever is a sprinkler head in which a convex portion is installed in the vicinity of an engaging portion with the support column, and the convex portion collides with the support column due to the rotational operation of the lever when the heat-sensitive operating portion is operated.

According to the sprinkler head having the above configuration, the heat of the fire melts the soluble alloy that bonds the two metal plates that make up the link, and the heat-sensitive actuating part is disassembled. At this time, the lever engaged with the link rotates to separate the two metal plates. At that time, the convex portion of the lever collides with the support column to encourage the support column to separate from the central axis of the nozzle.

The lever has an L-shaped curved shape, and one end is engaged with the first metal plate. The other end is engraved with a groove into which the stanchion is engaged. The convex portion is installed near the groove, and the convex portion is configured to collide with the support column by the rotational operation of the lever.

One end of the strut is placed on a valve that closes the nozzle, and the other end is engaged with the groove of the lever. The strut has a rod shape, and a second metal plate is engaged with the intermediate portion.

When the heat-sensitive actuating part is operated by the heat of the fire, the lever rotates around the groove as a fulcrum, so that the convex portion collides with the strut and separates the strut from the nozzle shaft. This can prevent lodgement.

As described above, according to the sprinkler head of the present invention, the convex portion installed on the lever causes the convex portion to collide with the support column during the disassembly operation of the heat-sensitive operating portion, and the support column is separated from the nozzle shaft to form a lodgement. Can be prevented. In addition, this eliminates the need to install a spring for preventing lodge, unlike the conventional product, and makes it possible to easily assemble the sprinkler head.

Front view of the sprinkler head of the present invention. FIG. 1 is a sectional view taken along line II-II of FIG. FIG. 2 is an enlarged cross-sectional view of the heat-sensitive operating portion in FIG. FIG. 1 is a sectional view taken along line IV-IV of FIG. Cross-sectional views (a) to (c) which show embodiment of the convex part.

The sprinkler head S1 of the present invention is composed of a main body 1, a deflector 2, a valve 3, and a heat-sensitive actuating unit 4.

The main body 1 has a hollow shape, and a male screw 11 for connecting to a pipe arranged near the wall surface of the building or inside the wall surface is provided on the outside, and the inside is a nozzle 12. Regarding the size of the nozzle 12, the value of the K factor derived from the flow rate and the discharge pressure of the nozzle 12 is in the range of 3 to 5.8, and the value of the K factor is 5.6 in this embodiment. The size of the male screw 11 connected to the pipe is NPT1 / 2 or R1 / 2.

A substantially rectangular base 13 is installed near the outlet of the nozzle 12, and a pair of frames 14 extending from the base 13 in the water discharge direction of the nozzle 12 are installed. The frame 14 is an intersection connected to a straight portion 14A (first arm) extending substantially parallel to the central axis A of the nozzle and a boss 15 installed on the central axis A of the nozzle 12 from the end of the straight portion 14A. It is equipped with 14B (second arm). As shown in FIG. 3, the intersecting portion 14B is thinner than the straight portion 14A, and the cross-sectional shape is elliptical.

The boss 15 is a columnar shape with a taper, and a deflector 2 is installed at the tip thereof, and the diameter D1 of the boss 15 on the side in contact with the deflector 2 is 9 to 10 mm. The outer peripheral diameter of the end of the boss 15 on the nozzle 12 side is smaller than the diameter D1 on the deflector 2 side. The outer peripheral end 15A of the boss 15 on the nozzle 12 side has a curved surface shape, and the radius of the curved surface is in the range of 1 mm to 3 mm, and is 2 mm in the present embodiment.

A female screw 15B is installed inside the boss 15, and an impress screw 16 is screwed in. The tip 16A of the impress screw 16 is sharp and has a slope 16B. The tip 16A faces the nozzle 12, and the angle α of the slope 16B is in the range of 80 ° to 100 °, which is 90 ° in the present embodiment. The apex of the tip 16A has a spherical shape, and the radius of the spherical surface is preferably 2 mm or less, and in the present embodiment, it is 1 mm or less.

The impress screw 16 has a function of pressing the valve 3 toward the nozzle 12 via the heat-sensitive actuating portion 4. In FIG. 3, the extension line 16C along the slope 16B of the tip 16A of the impress screw 16 is close to or in contact with the curved surface of the outer peripheral end 15A of the boss 15, and the water flowing along the surface of the tip 16A flows along the outer peripheral end. It does not interfere with the flow when passing through 15A and prevents the occurrence of turbulent flow.

The deflector 2 shown in FIG. 1 has a disk shape, and a plurality of claws 21 bent in the direction of the nozzle 12 are installed on the peripheral edge thereof.

Valve 3 blocks the outlet of nozzle 12 in normal times. The valve 3 is composed of a valve cap 31, a disc 32, and a disc spring 33. The valve cap 31 has a bottomed cylindrical shape, and one end side has a spherical bottom portion 31A. The other end side has an enlarged diameter, and a step 31B is installed.

A disc-shaped disc 32 is placed on the inner peripheral side of the stage 31B. The disk 32 has a recess 32A in the center, and the recess 32A is engaged with one end of a support column 42 of the thermal actuating portion 3.

A disc spring 33 is locked on the outer peripheral side of the step 31B. The disc spring 33 is inserted from the bottom 31A of the valve cap 31. The surface of the disc spring 33 is covered with fluororesin. The outer peripheral edge of the disc spring 33 is arranged at the outlet end of the nozzle 12, and when the impress screw 16 is screwed into the female screw 15B of the boss 15, the disc spring 33 is pressed through the heat-sensitive actuating portion 4 and crushed by elastic deformation. Become. At that time, the fluororesin acts as a sealing material to seal the nozzle 12.

The heat-sensitive operating unit 4 is composed of a link 41, a support column 42, and a lever 43. The link 41 is a heat-sensitive body that operates by the heat of a fire, and is configured by joining two thin metal plates 44 with a soluble alloy. As the soluble alloy, an alloy having a melting point in the range of 60 to 200 ° C. is used, and a soluble alloy having a melting point of 72 ° C. or 96 ° C. is generally used.

The two metal plates 44 having a substantially quadrangular shape have a hole 45 at one end, and a U-shaped missing portion 46 is installed at the other end. The two metal plates 44 are joined by a soluble alloy. At that time, the missing portion 46 of the other metal plate 44 is overlapped with the position of the hole 45 of the one metal plate 44. A support column 42 and a lever 43 are inserted into the two holes 45 of the link 41 after joining (see FIG. 4).

The support column 42 is a strip type, one end of which is engaged with the disc 32 of the valve 3 installed at the outlet of the nozzle 12, and the other end of which is engaged with the tip of the lever 43. As described above, the support column 42 is inserted into the hole 45 of the link 41. A protrusion 47 is installed in the middle of the support column 42, and the link 41 is locked in the groove 47A installed near the protrusion 47.

The lever 43 is configured by bending an elongated plate into a substantially L shape. As described above, one end side of the lever 43 is inserted into the hole 45 of the link 41. The other end side of the lever 43 is engaged with the support column 42, and the lever 43 is provided with a groove 48 with which the tip of the support column 42 is engaged.

A recess 49 is installed on the surface on the back side of the surface on which the groove 48 is installed. The recess 49 is installed at the other end of the lever 43 rather than the groove 48. The impress screw 16 is in contact with the recess 49. When the tip of the impress screw 16 presses the recess 49 of the lever 43, a force that rotates the lever 43 with the groove 48 in which the support column 42 is locked acts as a fulcrum. However, a hole 45 of the link 41 is inserted through one end side of the lever 43 to prevent the lever 43 from rotating. As a result, the link 41, the support column 42, and the lever 43 constituting the heat-sensitive operating portion 4 are maintained in an engaged state. Further, the impress screw 16 presses and holds the valve 3 toward the nozzle 12 via the heat-sensitive actuating portion 4.

On the other end side of the lever 43, near the groove 48 and the recess 49, a convex portion 50 that collides with the concentration 42 when the heat sensitive operating portion 4 is operated is installed. When the heat-sensitive operating portion 4 is operated, the end of the lever 43 on the side engaged with the link 41 with the groove 48 as a fulcrum rotates in the direction of the deflector, but at that time, the convex portion 50 collides with the support column 42, and the lever 43 collides with the support column 42. The support column 42 acts so as to move away from the nozzle central axis A.

The shape of the convex portion 50 in FIGS. 1 to 3 is shown in FIG. 5A, and the other end of the lever 43 is bent from the vicinity of the groove 48 toward the support column 42 to form the convex portion 5a. As another embodiment, the convex portion 5b in FIG. 5B is formed on the surface on the other end side of the concave portion 49 and on which the groove 48 is formed, and is a protrusion protruding toward the nozzle 12. Alternatively, as shown in FIG. 6C, the convex portion 5c may be configured so that the other end of the lever 43 is bent 180 degrees so that the end face faces the support column 42. The above-mentioned bending angle can be set to any angle from 45 ° to 180 °.

Next, the operation of the sprinkler head S1 described above will be described.

The sprinkler head S1 has a nozzle 12 connected to a water supply pipe, and is installed on an indoor ceiling or at a high position. When a fire breaks out, the heat melts the soluble alloy of the link 41 of the heat-sensitive actuating part, and the bonded state of the two metal plates 44 is released.

The recess 49 of the heat-sensitive operating portion 4 is pressed by the impress screw 16, and when the joint state of the two metal plates 44 is released, the lever 43 rotates with the groove 48 as a fulcrum. The rotation of the lever 43 pulls the two metal plates 44 apart, and the force applied to the valve 3 from the impress screw 16 via the support column 42 is released, and the valve 3 is opened. Further, the rotation of the lever 43 causes the convex portion 50 to collide with the support column 42 and prompts the support column 42 to move away from the nozzle central axis A.

When the valve 3 is opened, the water in the nozzle 12 flows toward the deflector 2. At this time, since the support column 42 is located at a position deviated from the nozzle central axis A, it is discharged to the outside by the water flow. The water that collides with the deflector 2 is evenly distributed in all directions.

1 body
2 deflector
3 valve
4 Thermal activator
12 nozzles
14 frames
15 boss
16 Impress screw
41 links
42 props
43 lever
48 grooves (engagement part)
49 recess
50 (5a, 5b, 5c) Convex part

Claims

The main body with a nozzle connected to the water supply pipe inside,
A valve that always closes the nozzle,
A pair of frames extending from the main body in the water discharge direction of the nozzle,
The tip of the frame is connected on the central axis of the nozzle, and the deflector installed at the tip of the frame
It is provided with a heat-sensitive actuating portion installed between the valve and the deflector.
The heat-sensitive actuating portion includes a link in which two metal plates are bonded with a soluble alloy, a lever and a strut engaged with the link, one end of the strut is placed on the valve, and the other end is said. Engages with the lever
A sprinkler head characterized in that a convex portion is installed in the vicinity of an engaging portion of the lever with the support column, and the convex portion collides with the support column due to a rotational operation of the lever when the heat-sensitive operating portion is operated.
The sprinkler head according to claim 1, wherein the lever is bent in an L shape and a convex portion is installed on the tip end side of the engaging portion.
The sprinkler head according to claim 1 or 2, wherein the convex portion is formed by bending the tip end side of the diameter portion toward the support column side.
The sprinkler head according to claim 3, wherein the bending angle of the convex portion is 45 ° to 180 °.
The sprinkler head according to claim 2, wherein the convex portion is a protrusion protruding from a flat surface on the tip side of the engaging portion toward the nozzle.