KR101926695B1 - Sprinkler head - Google Patents

Abstract

(assignment)
The present invention provides a sprinkler head in which a force for separating a valve body of a sprinkler head installed in a negative pressure sprinkler facility from a nozzle end is solved with a small force.
(Solution)
And a nozzle 6 connected to a pipe connected to a water supply source is provided at one end of the main body 1. The outlet of the nozzle 6 is connected to the valve 6 supported by the thermally decomposing part 4, And the spring S provided in the vicinity of the outlet of the nozzle 6 presses a part of the outer peripheral portion of the valve element 3 in the direction of separating from the outlet of the nozzle 6, (S) presses the valve element (3) in the direction to release the coaxial state of the nozzle (6) and the valve element (3).

Description

SPRINKLER HEAD {SPRINKLER HEAD}

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

The sprinkler head is installed on a ceiling surface or a wall surface in a building and has a nozzle connected to a pipe connected to a water supply source at one end and a nozzle connected to the other end, (Thermal decomposition section) is provided. In normal operation, the thermosensitive actuating part supports a valve body that closes the nozzle.

As an example of the above-mentioned sprinkler head, there is a sprinkler head corresponding to a negative pressure sprinkler facility in which the piping is a negative pressure (for example, see Patent Document 1).

The sprinkler head of Patent Document 1 shown in Fig. 9 has a structure in which a " spring (sealing plate) " that closes a nozzle connected to a water supply pipe is pressurized in a direction separating from a nozzle end (spring) " Although the "sealing plate" is always supported by the thermal decomposition part provided with the "low melting point alloy" at all times, the "low melting point alloy" is melted (melted) by the heat of the fire, When the pyrolysis section is decomposed and operated, the support of the " seal plate " is released and the " seal plate " At this time, the inside of the nozzle is a negative pressure, and the " sealing plate " is adsorbed to the nozzle end, but the sealing plate is separated from the nozzle end by the pressing force of the " spring "

Patent Document 1: JP-A-11-206908

The above sprinkler head presses the entire periphery of the " sealing plate " by a " spring ", but there is a problem that the larger the diameter of the nozzle is, the larger the pressing force of the " spring " In addition, there has been a problem that it is necessary to adopt a constitution to prevent the "sealing plate" separated from the nozzle from being sucked by the negative pressure in the nozzle and closing the nozzle again.

In view of the above problem, in the present invention, the force for separating the valve body of the sprinkler head provided in the negative pressure sprinkler facility from the nozzle end is solved by a small force, and the valve body separated from the nozzle once is sucked And to prevent the nozzle from being closed again.

In order to achieve the above object, the present invention provides the following sprinkler head. That is, the present invention relates to a thermal decomposition unit which has a nozzle connected to a pipe connected to a water supply source at one end of a main body and is connected to a tip end of a frame portion extending in the waterproof direction from the vicinity of an outlet of the nozzle, And the spring provided in the vicinity of the outlet of the nozzle separates the valve body from the outlet of the nozzle while the spring urges the valve body in the direction to release the coaxial state of the nozzle and the valve body .

The sprinkler head of the above structure is installed in a negative pressure sprinkler facility in which the inside of the piping is negative. When the decompression section is operated by the heat at the time of fire to release the support of the valve body, the valve body is released from the outlet of the nozzle by the force of the spring and is opened. In addition, by keeping the axis of the nozzle and the axis of the valve body from coaxial to keep the valve body separated from the outlet of the nozzle, the opened valve body is again attracted by the negative pressure in the nozzle to prevent the nozzle from clogging.

When the valve body is opened, the axis of the nozzle and the axis of the valve body which are coaxial with the valve body closed are released from the coaxial state between the axis of the nozzle and the axis of the valve body. When the nozzle body and the valve body are coaxial with each other when the valve body is opened, the valve body is liable to be sucked toward the nozzle side by the negative pressure in the nozzle. However, when the valve body is open and the nozzle and the valve body are not coaxial, The range of the force for attracting the valve body to the nozzle side is reduced. More specifically, when the axis of the nozzle and the axis of the valve body are parallel to each other and have a predetermined gap between the two axes, the area in which the negative pressure in the nozzle acts on the valve body is reduced, The distance between the valve body and the nozzle outlet end portion is far away from the portion near the valve body, and the suction force due to the negative pressure in the nozzle is small at the distant portion, so that the valve body is sucked toward the nozzle side Can be restrained.

According to the present invention as described above, a spring is mounted on the valve body, and when the spring is in a no-load state, the central axis of the valve body is inclined relative to the central axis of the nozzle.

Accordingly, when the sprinkler head is operated and the valve body is moved away from the nozzle due to the action of the spring, since the central axis of the valve body is inclined with respect to the central axis of the nozzle, when water is discharged from the nozzle, do. Since the valve body is inclined, the valve body is scattered in the oblique direction and is discharged to the outside of the sprinkler head without interfering with the deflector provided on the extension line of the central axis of the nozzle. Alternatively, when the sprinkler head is operated by increasing the pressing force of the spring, the valve body can be repelled out of the sprinkler head by the pressing force of the spring. In addition, in the downward sprinkler head (downward sprinkler head) in which the waterproof direction of the nozzle is directed downward, when the sprinkler head is operated, the valve body is displaced downward obliquely by its own weight and the urging of the spring, The valve body and the spring can be released to the outside of the sprinkler head without interfering with the deflector provided on the extension line of the central axis of the nozzle.

According to the present invention, the one end side of the spring is a valve body support portion for supporting the valve body, and the other end side is configured as a support portion provided in the vicinity of the nozzle.

Accordingly, when forming the spring, a wire-like spring material can be bent. Alternatively, it is also possible to form the valve body support portion on one end side and to form the support portion on the other end side by bending a plate spring material. At this time, when the valve body support portion is bent to cover the upper surface and the lower surface of the valve body along the outer peripheral portion of the valve body to support the valve body, the valve body can be fixed to the spring. With the above-described configuration, the spring itself can be made larger, and the amount of displacement and the pressing force by the spring can be increased.

According to the present invention, the support portion of the spring is inserted into the annular protrusion of the nozzle outlet.

By inserting the support portion of the spring into the annular projection portion of the nozzle outlet, the support portion of the spring and the nozzle can be coaxially installed when the sprinkler head is assembled.

According to the present invention described above, the connecting portion connecting the valve body support portion and the support portion is arranged in a direction rotated by 90 占 from the frame.

According to this, it is possible to prevent the axis of the valve body from pointing in the direction of the frame when the sprinkler head is operated, and to prevent the valve body from colliding with the frame due to the force of water discharged from the nozzle.

According to the present invention described above, the spring presses a part of the outer peripheral portion outside the nozzle on the nozzle-side surface of the valve body.

According to this, in the conventional sprinkler head, the spring presses the entire circumference of the valve body, and since the direction in which the spring presses the valve body is the water-tightness direction of the nozzle, the valve body is not opened unless a pressing force larger than a negative pressure applied to the valve body is applied I did. In the sprinkler head of the present invention, the valve body concentrates only on a part of the outer circumferential portion of the valve body in a direction different from that of the axis of the valve body, for example, Thereby exerting a force for releasing the coaxial state. When the decompression thermal decomposition part is decomposed and operated, the valve body is tilted by the spring and the nozzle is opened with a small force because the valve body and the nozzle are separated from the nozzle outlet while releasing the coaxial state. For example, when a suction cup (suction plate) adsorbed on a glass is separated, it is difficult to separate the suction half even if the central part of the suction half is pulled out. However, if the suction half is rolled up, It is the same principle as can be.

According to the present invention, the spring has a ring shape having a notch, and each end is bent in a direction away from each other.

It is possible to insert the spring into the outer periphery of the nozzle outlet by forming the spring into a ring shape, thereby positioning the spring that presses only a part of the outer periphery of the valve body.

Further, by bending each end of the ring in the direction away from each other, the amount of displacement of the ring in the axial direction can be ensured in the notch portion, and only the portion in contact with the notch portion of the valve body can be pressed.

According to the present invention, the spring is ring-shaped, a part of the edge of the ring extends outwardly, and the extension part is bent to form a leaf spring part.

By forming the ring-like shape in the same manner as described above, it is possible to insert the outer periphery of the nozzle outlet and extend a part of the ring edge outwardly so that the extension portion is folded and bent to form the plate spring portion. can do.

According to the present invention as described above, the valve body is formed at the valve body outer peripheral portion with the spring coupling portion to which the spring is engaged.

By providing a spring engaging portion to which a spring is engaged with the valve body, a pressing force of a spring can be exerted only on the spring engaging portion, and a pressing force can be applied by tilting the valve body.

According to the present invention as described above, the spring is provided with a coupling portion with a main body for preventing rotation.

It is possible to prevent the spring from rotating away from the predetermined pressing position by providing the engaging portion with the main body.

In the present invention, the sprinkler head is an upward sprinkler head with the waterproof direction of the nozzle upward.

By applying the above spring to the upward sprinkler head, the valve body can be surely separated from the nozzle end and opened when the decompression portion of the sprinkler head is operated. Further, the valve body can be discharged to the outside of the sprinkler head by the water discharged from the nozzle.

As described above, according to the present invention, the valve body of the sprinkler head provided in the negative pressure sprinkler facility is pressed by the spring, and the valve body is opened in a tilted state, so that the force for separating the valve body from the nozzle end is reduced And it is also possible to provide a sprinkler head which can prevent the valve element separated from the nozzle once from being sucked by the negative pressure in the nozzle and closing the nozzle again.

1 is a front view of a sprinkler head of the present invention;
2 is a sectional view taken along the line X-X in Fig. 1
[Figure 3] Y-Y cross-sectional view of Figure 1
4 is an enlarged cross-sectional view of the valve body portion of FIG. 2: (a) normal, (b)
5 is a schematic diagram of a sprinkler facility equipped with a sprinkler head of the present invention;
[Fig. 6] Modifications of leaf spring: (a) normal, (b) operation
7 is a side view of the leaf spring of Fig. 6
8 is a modification of the valve body: (a) an enlarged cross-sectional view of the valve body portion, (b) a plan view of the valve body
9 is a sectional view of a conventional sprinkler head
10 is a sectional view of the sprinkler head of the second embodiment
Fig. 11 (a) is a plan view of only the valve body and the spring portion of Fig. 10, Fig. 10 (b) is an enlarged cross-
(A) is a perspective view of a spring modified example 1 of the second embodiment, (b) is an enlarged sectional view (after operation) of a valve body portion of the sprinkler head in which the spring is assembled, (c) (40a): a state in which the pole portion is provided
13 (a) is a perspective view of a spring modified example 2 of the second embodiment, (b) is a state in which the spring is assembled to a sprinkler head (only the springs are shown in the drawing)

First Embodiment ( 1 ~ 5 )

Hereinafter, the sprinkler head of the first embodiment will be described with reference to Figs. 1 to 5. Fig.

The sprinkler head A includes a main body 1, a deflector 2, a valve body 3, a thermal decomposition portion 4, a thermosensitive body ) (5).

The main body 1 is provided with a male thread to be connected to a fire extinguishing equipment pipe on the outer circumferential surface and a nozzle 6 capable of discharging water in the pipe is formed inside thereof . 2) extending in the water-spraying direction (the water-spraying direction) (the upward direction in Figs. 1 and 2) of the nozzle 6 from the end face 6A is formed in the vicinity of the end face 6A on the outlet side of the nozzle 6, A frame 7 is provided and the frame 7 is formed with a boss portion 8 intersecting on the axis of the nozzle 6. [

A deflector 2 is fixedly provided at the tip end of the boss portion 8 to collide water splashed from the nozzle 6 and scatter it in all directions. The deflector 2 has a disk shape, and a plurality of notches are formed at the edges (the notch is not shown in Fig. 2). A female thread 8A is formed inside the boss portion 8. [ An impress screw 21 to be described later is coupled to the female screw 8A and the tip of the impression screw 21 is coupled to the thermally decomposed part 4. [

A flange portion 6B for engaging a spring S to be described later is formed between the frames 7 and 7 on the outlet side of the nozzle 6 and a concave portion 6C is formed in the flange portion .

The valve body 3 closes the nozzle 6 and is disposed at the outlet end of the nozzle 6 and is pressed toward the nozzle 6 by the thermal decomposition part 4, . A sealing material (sealing material) 3A is inserted between the valve body 3 and the end surface 6A of the nozzle 6. [ Although the sealing material 3A is attached to the valve element 3 side by a pressure sensitive adhesive agent, it may be attached to the end surface 6A of the nozzle 6. [

A spring S is provided on the nozzle end face 6A side of the valve body 3 to press a part of the outer peripheral portion of the valve body 3 in the direction in which the valve body 3 is opened. The spring S has a ring shape as shown in Fig. 3 and is inserted into the outer peripheral portion of the nozzle 6 from the nozzle end surface 6A. A portion of the outer circumferential edge of the spring S is formed with an extended portion S1 extending outwardly (indicated by a dotted line in FIG. 3), and the extended portion S1 is bent, (S2). The spring portion S2 may extend from the inner peripheral edge of the ring portion to the inside.

Only the part of the outer circumferential portion of the valve element 3 is pressed in the opening direction (opening direction) by the spring portion S2 so that when the thermal decomposition portion 4 is decomposed and operated, The nozzle 3 can be separated from the nozzle face 6A.

And an engaging portion S3 extending to engage with the flange portion 6B of the main body 1 is formed on the side opposite to the spring portion S2. The tip end S4 of the engaging portion S3 is shown to be wider than the tip end S4 of the engaging portion S3 when the spring S is inserted into the outer peripheral portion of the nozzle 6, 6B, the distal end S4 is engaged with the flange portion 6B.

And has an action of preventing the rotation of the spring S by engaging the engaging portion S3 inside the concave portion 6C. And has a function of preventing the spring S from falling off by engaging the tip end S4 of the engaging portion S3 with the flange portion 6B. In the above embodiment, only one engaging portion S3 is provided. However, since there are two recesses 6C of the main body 1, it is also possible to provide two engaging portions S3 in accordance with this. At this time, the extended portion S1 may be provided between the two engaging portions S3, for example, on one side of the frame 7 side.

The thermal decomposition part 4 is composed of a lever 10, a support column 11 and a balance 12. The thermal decomposition part 4 is constituted by combining the respective components and the below-described thermosensitive body 5, and each part is assembled in a state in which a load is applied.

The lever 10 has an L-shaped cross section and a hemispherical groove 10A is formed on the surface of the boss portion 8 side. A V-shaped groove 10B is formed on the inner side of the hemispherical groove 10A.

The post 11 has a substantially elliptical shape with a hole 11A at its center and an engagement branch 11B is curved outward from the hole 11A from the end of the hole, From the other end of the hole 11A, a pivot support branch 11C is bent in the same direction as the coupling branch 11B. Both ends of the pillars 11 are knife edges.

The balancer 12 is formed in a curved neck shape having a thick width at its one end, a hemispherical protrusion 12A is formed at the thick width portion, and an engaging portion 12B bent at the other end in an oblique direction is formed .

The heat insulating body 5 is composed of a cylinder 14, a soluble alloy 15 and a piston 16, and the cylinder 14 has a cylindrical shape with a bottom And has a soluble alloy (15) inside. This soluble alloy 15 is unified by injecting an alloying material in a molten state into the cylinder 14 and curing it. In addition, the soluble alloy 15 shown in the drawings may be inserted into the cylinder 14 beforehand to be integrated. On the outer side of the bottom surface of the cylinder 14, a mortise-shaped engagement hole 14A is formed.

The thermosensitive body 5 having the above configuration constitutes a unit of the thermosensitive decomposition unit 4 included in the lever 10, the pillars 11, and the balance 12. The structure of the unit is shown below.

The hemispherical groove 10A of the lever 10 is engaged with the hemispherical tip of the impression screw 21 and the end of the lever 10 is engaged with the engaging portion 12B of the balance 12. The V-shaped groove 10B of the lever 10 is engaged with one end of the column 11 and the other end of the column 11 is engaged with the V-shaped groove of the valve element 3. The balance 12 which is engaged with the end of the lever 10 is inserted into the hole 11A of the support 11 and the place which becomes the lower face in Fig. 2 is supported by the pivot support 11C of the support 11, I am on top.

The engaging branch 14A of the cylinder 14 is engaged with the engaging branch 11B of the support 11. The hemispherical protrusion 12A of the balance 12 is engaged with the hole 16A of the piston 16 inserted into the cylinder 14.

When the impression screw 21 is engaged with the female screw 8A of the boss portion 8 in the main body 1, a load is applied from the tip of the impression screw 21 to the reduced thermal decomposition portion 4, 3 to the nozzle 6 side to close the nozzle 6.

The thermal decomposition part 4 is always subjected to the load by the valve element 3 and the impression screw 21 and the force acts on the cylinder 14 from the coupling branch 11B of the column 11 A force acts on the piston 16 from the hemispherical protrusion 12A of the balance 12 to apply compressive force to the soluble alloy 15.

Next, the operation of the sprinkler head A of the first embodiment will be described.

The sprinkler head of the present invention is installed in a negative pressure sprinkler facility and is held so that the piping is in negative pressure. The negative pressure sprinkler installation is described in Japanese Patent No. 3264939 and Japanese Patent Application Laid-Open No. 2004-201746, and therefore, detailed description thereof will be omitted.

5, the sprinkler head A has a sprinkler head SH mounted on a lower portion of the roof 130, that is, a standing portion 131 of a fire extinguishing facility pipe P installed inside the room, And the waterproof direction of the deflector 2 and the nozzle 6 is directed toward the roof 130 side (upward).

A fire detector (K) is installed near the sprinkler head (A). When the fire detector K detects a fire, it activates the water supply device and supplies water to the pipe P.

When a fire occurs, the ambient temperature rises due to the heat of the fire, so that the cylinder 14 of the sprinkler head A absorbs heat and the soluble alloy 15 in the cylinder 14 melts. On the other hand, the fire detector K operates by increasing the ambient temperature and outputs an operation signal.

When the fusible alloy 15 melts, the piston 16 is immersed in the cylinder 14 and the balance of the power of the thermally decomposed part 4 collapses, so that the balance 12 is pivoted to the pivot support branch 11C Shaped protrusion 12A rotates toward the piston 16 with the tip of the piston 12 as a point. The engagement of the lower end of the lever 10 with respect to the engaging portion 12B of the balance 12 is lost due to the rotation of the balance 12 and the lower end of the lever 10 is rotated around the hemispherical groove 10A. The support 11 is also disengaged from the lever 10 in accordance with the rotation of the lever 10 so that the thermal decomposition portion 4 is disassembled and operated.

The decompression section 4 supporting the valve element 3 is disassembled to release the force that presses the valve element 3 toward the nozzle 6 so that the valve element 3 becomes openable. The spring S acts in a direction separating the valve body 3 from the nozzle end face 6A so that the valve body 3 is separated from the nozzle 6 and the inside of the nozzle 6 and the inside of the nozzle are pressurized, 3 is weakened and the nozzle 6 is opened. As shown in Fig. 4, in the sprinkler head (Fig. 4 (a)) before operation, the axis 6E of the nozzle 6 and the axis 3E of the valve element 3 are coaxial , And the axis of the valve element 3 is inclined with respect to the axis of the nozzle 6 in the sprinkler head after operation (Fig. 4 (b)).

Since the water supply device is activated by the operation signal of the fire detector K provided in the vicinity of the sprinkler head A, water supply to the sprinkler head A starts and water is discharged from the nozzle 6. [ The valve body 3 and the spring S are released to the outside of the sprinkler head A by the momentum of water and the water impinging on the deflector 2 is scattered in all directions so that fire is suppressed and extinguished.

The case where the fire detector K operates after the sprinkler head A is operated will be described.

When the sprinkler head A is operated by the heat of fire, the thermal decomposition part 4 supporting the valve element 3 is disassembled and operated to be discharged to the outside of the sprinkler head A. Since the valve body 3 is pressed by the spring S, the valve body 3 is separated from the nozzle end face 6A, and the valve body 3 is opened in an inclined state.

Since the outside air flows into the pipe P from the nozzle 6 due to the opening of the valve body 3 in the pipe P, the pressure rises. When the pressure in the piping P rises and reaches a predetermined pressure, a suction device not shown in the drawing connected to the piping P operates to pressurize the piping P again . The valve body 3 is supported by the spring S in an inclined state so that the valve body 3 is prevented from being pulled close to the nozzle end face 6A by the negative pressure in the nozzle 6. [

When the fire detector K is operated, the suction device is stopped, and the water supply device installed on the pipe P is started, and the pressurized water is sent and sent from the water source to the sprinkler head B that is operated. Water is discharged from the nozzle 6 of the operated sprinkler head B and the valve element 3 is discharged to the outside of the sprinkler head B together with the spring S by the momentum of water. Water collides with the deflector 2 and is scattered in all directions, thereby suppressing and extinguishing the fire.

Modification of the first embodiment ( 6 ~ 8 )

Modifications of the above embodiment are shown in Figs. 6 and 7. Fig. As shown in the figure, the spring S has a shape in which a part of the ring is cut, and the ends (22A, 22B) of the notch portion (22) of the ring are moved away from each other It is constituted by bending. In Fig. 7, two types of springs are shown. In Fig. 7 (a), the tip of the notch of the ring is bent in a direction in which the ends thereof are separated from each other. In the drawings, both ends of the notch tip are formed by bending, but it is also possible to bend only one of them. Fig. 7 (b) is formed by bending the entire ring so that the respective ends of the ring are distanced from each other at the notch portion of the ring.

Fig. 8 shows a modification of the valve body. In the valve body shown in Fig. 8, only a part of the outer peripheral portion is protruded outward to form the spring engaging portion 3B.

Second Embodiment ( 10 ~ 11 )

Next, the sprinkler head of the second embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.

The second embodiment is a power generation type of the modification of the first embodiment described with reference to Figs. 6 and 7, in which the valve body support portion is provided on one end side of the spring and the support portion provided on the other end side is provided in the vicinity of the nozzle. In the sprinkler head B shown in Fig. 10, a spring 30 is provided on the side of the nozzle face 6A of the valve body 3. 6 and 7, the valve element 3 is pressed by only the distal end portion of the spring S, but the spring 30 of the second embodiment is provided on the valve element support portion 31 in the modification of the first embodiment shown in Figs. So that most of the valve body 3 is pressed.

11A to 11C, the spring 30 is formed by bending a wire-shaped spring material in a layer shape. The spring 30 has a valve body support portion (not shown) for supporting the valve body 3 31, and a support portion 32 provided near the outlet of the nozzle 6. The valve body support portion 31 supports the valve body 3 by being bent so as to cover the upper surface and the lower surface of the valve body 3 along the outer peripheral portion of the disk-shaped valve body 3. The valve body support portion 31 is provided on the outer peripheral side of the valve body 3 in contact with the nozzle 6 and the valve body support portion 31 is engaged with the valve body 3 when the sprinkler head B is assembled So that they do not interfere with each other between the nozzles 6. More specifically, the valve body support portion 31 shown by the broken line in FIG. 11 (a) is a portion provided on the surface of the valve body 3 on the nozzle 6 side, and is a ring- And the broken line portion is disposed outside the outer diameter of the projecting portion (annular projection portion) 33.

The supporting portion 32 is bent in a rectangular shape and the inside is installed to be inserted into the annular projection 33 of the outlet end of the nozzle 6 protruding from the bottom of the frame 7 toward the boss 8 side. In the above configuration, the support portion 32 is formed in a rectangular shape, but the support portion 32 may be formed in a circular shape. Further, it is also possible to form the support portions 32 in a spiral form like a coil spring, and to increase the pressing force of the springs 30. [ More specifically, a pressing force in the water-repellent direction of the nozzle 6 is obtained by the supporter 32 laminated in a spiral shape, and a pressing force in a direction inclining from the axis 36 of the nozzle 6 by a connecting portion 34 The spring 30 is urged upward at an angle. The supporting portion 32 is released from the annular projection 33 of the nozzle 6 by the action of the spring 30 during the operation of the sprinkler head B and the valve body 3 and the spring 30 are moved to the sprinkler head (B).

A connection portion 34 is provided between the valve body support portion 31 and the support portion 32. 10, the connecting portion 34 is formed by the thermal decomposition portion 4 provided between the valve body 3 and the impression screw 21 in a normal state (a state before the sprinkler head B is operated) And is in a bent state.

When the sprinkler head B is operated and the thermally decomposed portion 4 is discharged to the outside of the sprinkler head B, the connecting portion 34 is returned to the original linear shape as shown in Fig. 11 (b) The shaft 35 of the nozzle 3 is supported in a state inclined from the axis 36 of the nozzle 6. As the length of the connecting portion 34 is increased, the distance by which the valve element 3 moves away from the nozzle 6 during operation of the sprinkler head B can be increased.

The angle between the valve body support portion 31 and the support portion 32 is set to a predetermined angle?. The angle? Is an interval of 15 ° to 50 °, more preferably 20 ° to 40 °, in a no-load state of the spring 30. By providing the inclination of the angle?, The valve body 3 can be discharged to the outside of the sprinkler head by the water discharged from the nozzle 6. [ The valve body 3 is scattered in the direction of the boss 8 by the water discharged from the nozzle 6 so that the deflector 2 is rotated in the direction of the boss 8 when the valve body support portion 31 and the support portion 32 are supported in parallel positions, In the vicinity of the edge portion of the frame.

This makes it possible to prevent the valve element 3 from being sucked toward the nozzle 6 and closing the nozzle 6 again even if the piping to which the sprinkler head B is connected is in a negative pressure state. The shaft 35 of the valve body 3 and the shaft 36 of the nozzle 6 are not coaxial so that when the water is discharged from the nozzle 6 after the operation of the sprinkler head B, Can be discharged to the outside of the sprinkler head (B) by the water flow.

The support portion 32 is formed with a coupling portion 37 engageable with the main body 1. The engaging portion 37 is formed at the distal end of the supporting portion 32 and is coupled to the inside of the concave portion 6C formed in the vicinity of the nozzle 6 of the main body 1. [ Accordingly, the rotation of the spring 30 can be prevented, and the pressing position of the spring 30 can be maintained.

When the engaging portion 37 is formed in the vicinity of the connecting portion 34, the engaging portion 37 is engaged with the concave portion 6C formed in the middle of the pair of frames 7 and 7 so that the sprinkler head B It is possible to prevent the shaft 35 of the valve body 3 from being directed in the direction of the frame 7. [ The valve body 3 can be prevented from colliding with the frame 7 when it is scattered by the water flow discharged from the nozzle 6. [

The spring 30 of the second embodiment is formed by pressing a large part of the valve body 3 by the valve body support portion 31 and is larger in size than the spring S of the first embodiment, And the amount of displacement of the spring S is larger than that of the spring S of the first embodiment.

More specifically, the spring S of the first embodiment presses only a part of the outer circumferential portion of the valve body 3 by the spring portion S2, but the spring 30 of the second embodiment has the valve body 3 Most of the outer circumferential portion thereof is supported by the spring 30,

In the state after the operation of the sprinkler head B (Fig. 11 (b)), the amount of displacement of the valve body 3 also increases. 10), the overall size of the spring 30 is approximately the same as that of the spring S of the first embodiment, and the installation position of the spring 30 is the same as that of the first embodiment Like the spring S of the present invention. The present embodiment has a merit that the installation space of the spring 30 can be compactly obtained while increasing the amount of displacement of the valve body 3 by the spring 30. [

Modification 1 of the second embodiment ( 12 )

Next, a modified example of the second embodiment will be described. The spring 40 shown in Fig. 12 is in the form of a leaf spring folded in two and a concave portion 41 is provided as a valve body support portion in one of the pieces 40a, and the other piece 40b Is formed with a hole 42 through which the annular protruding portion 33 at the outlet end of the nozzle 6 can be inserted as a supporting portion.

The concave portion 41 has a circular shape and its inner diameter is slightly larger than the outer diameter of the valve body 3. An inner flange 41a is formed in the concave portion 41 and an outer peripheral portion of the valve body 3 is coupled to the inner flange 41a. The outlet end of the nozzle 6 is in contact with the valve element 3 inside the inner flange 41a and the inner flange 41a is inserted between the valve element 3 and the nozzle 6 .

A middle portion between the piece 40a and the piece 40b is a bent portion 43 and corresponds to the connecting portion 34 of the second embodiment. The bent portion 43 maintains the angle between the piece 40a and the piece 40b at a predetermined angle when the spring 40 is in a no-load state. This angle is an interval of 15 ° to 50 ° in a no-load state, more preferably 20 ° to 40 °. The shaft 44 of the valve body 3 is tilted with respect to the shaft 45 of the hole 42 in the no-load state shown in Fig. 12 (b) The body 3 can be released to the outside of the sprinkler head. The axis 45 of the hole 42 is coaxial with the axis 36 of the nozzle 6 since the annular projection 33 is inserted into the hole 42 of the nozzle 6. [

The bending portion 43 is provided in a direction rotated by 90 degrees from the direction in which the frames 7 and 7 are installed so that the shaft 44 of the valve body 3 faces the direction of the frame 7 when the sprinkler head is operated . The valve body 3 can be prevented from colliding with the frame 7 when it is scattered by the water flow discharged from the nozzle 6. [

As shown in Fig. 12 (c), a C-shaped notch 46 is formed at the edge of the recess 41 to form a pawl portion 47 formed between the notch 46 and the recess 41 ). When the claw portion 47 is bent inside the concave portion 41 after accommodating the valve element 3 in the recessed portion 41, the claw portion 47 is in a state shown by a dotted line, The valve body 3 can be supported so as to cover the lower surface of the valve body 3 and the valve body 3 can be fixed to the spring 40. [

Modification 2 of the second embodiment ( 13 )

A modification of the second embodiment which is different from the above will be described. The spring 50 shown in Fig. 13 is in the form of a leaf spring which is folded into three pieces. A hole 51 is formed as a valve body support portion on one side piece 50a, and a nozzle 6 Is formed with a hole 52 into which the annular projection 33 at the outlet end of the screw hole can be inserted. And a connection portion 50c is provided between the pieces 50a and 50b.

The hole 51 has a circular shape and its inner diameter is smaller than the outer diameter of the valve body 3 and larger than the outer diameter of the outlet end of the nozzle 6. The outer peripheral portion of the valve body 3 is pressed against the outlet end of the nozzle 6 in contact with the edge portion of the hole 51 at a normal time. The spring (50) presses the outer peripheral portion of the valve body (3). The configuration of the hole 51 can be replaced by the recess 41 which is the same as that of the first modification.

The connecting portion 50c has an action of separating the shaft 53 of the hole 51 and the shaft 54 of the hole 52 at a predetermined interval when the spring 50 is in a no-load state. In the normal state (before the sprinkler head is in operation), the connecting portion 50c is folded between the pieces 50a and 50b so that the shafts 53 and 54 are coaxial. In the state after the sprinkler head is operated, Is released, and each axis is separated by a gap. This makes it possible to prevent the valve element 3 from being pulled close to the nozzle 6 side by the negative pressure in the nozzle 6 after the operation of the sprinkler head to close the nozzle 6.

A predetermined gap is provided between the shaft 53 of the hole 51 in which the valve element 3 is received and the shaft 54 of the hole 52 into which the annular projection 33 of the nozzle 6 is inserted When the sprinkler head is operated, the spring 50 is operated such that the part 50a on which the valve body 3 is supported restores the part 50b by the restoring force of the spring 50 and the self weight of the valve body 3 The spring 50 and the valve body 3 can be released to the outside of the sprinkler head.

One ; main body
2 ; Deflector
3; Valve body
4 ; The thermal decomposition part
5; Thermostat
6; Nozzle
6A; Nozzle cross section
6B; Flange portion
6C; Concave portion
7; frame
22; Notch
S, 30, 40; spring
S1; Extension portion
S2; Spring portion
S3, 37; Engaging portion
S4; The tip of the joint
31; The valve-
32; Support
33; Annular projection
34; Connection
35; The axis of the valve body
36; The axis of the nozzle

Claims (14)

A nozzle connected to a water supply source at one end of the main body and connected to a pipe maintained at a negative pressure inside the nozzle, A valve body supported by a thermally decomposing part (thermally decomposing part) which is connected to a tip end of a frame part extending in a waterproof direction (water discharge direction) And the spring inserted into the annular protrusion provided on the outer periphery of the outlet of the nozzle separates the valve body from the outlet of the nozzle and the spring is separated from the outlet of the nozzle by the coaxial state of the nozzle and the valve body And presses the valve body in a direction to release the coaxial state of the sprinkler head.
The method according to claim 1,
Wherein a spring is mounted on the valve body and the central axis of the valve body is inclined relative to the center axis of the nozzle when the spring is in a no load state.
The method according to claim 1 ,
Wherein one end of the spring is a valve body support portion for supporting the valve body and the other end side is formed as a support portion provided around the annular protrusion portion.
The method of claim 3 ,
And the support portion of the spring is inserted into the annular protrusion.
5. The method of claim 4 ,
A spring is a sprinkler head formed by bending a wire-shaped spring material into a layer.
5. The method of claim 4 ,
The sprinkler head is formed by bending a spring member of a flat plate shape, and has one end as a valve body support portion and the other end side as a support portion provided in the vicinity of the nozzle.
The method according to claim 5 or 6,
The valve body support portion is formed to cover the upper surface and the lower surface of the valve body along the outer peripheral portion of the valve body to support the valve body.
The method of claim 3 ,
And a connecting portion (connecting portion) for connecting the valve body supporting portion and the supporting portion is disposed in a direction rotated by 90 占 from the frame.
The method according to claim 1,
Wherein the spring presses a part of the outer peripheral portion outside the nozzle on the nozzle-side surface of the valve body.
10. The method of claim 9,
Wherein the spring has a ring shape having a notch and each end is bent in a direction away from each other.
10. The method of claim 9 ,
Wherein the spring is in the form of a ring, a part of the edge of the ring is formed to extend outwardly, and the extension part is bent to form a plate spring part.
10. The method of claim 9 ,
Wherein the valve body is formed with a spring engaging portion to which the spring is engaged in an outer peripheral portion of the valve body.
The method according to claim 1 ,
Wherein the spring is formed with a coupling portion to prevent rotation of the sprinkler head.
The method according to claim 1 ,
The sprinkler head is a upward sprinkler head whose waterproof direction of the nozzle is upward.

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