TW201328748A - Water spraying head - Google Patents

Abstract

This invention provides a water spraying head in which a valve of the spraying head mounted on the negative pressure water spraying equipment can be separated from a spray nozzle by using a smaller force. One end of a main body 1 has a nozzle 6 that can be connected with the pipe connected to a water source. An outlet of the nozzle 6 is blocked by the valve 3 supported by a heat-sensing separating part 4 that can be separated by the heat of fire. A spring S arranged near the outlet of the nozzle 6 applies a force to a portion of a circumference of the valve 3 in the direction of separating from the outlet of the nozzle 6 so that the spring S applies a force on the valve 3 in a direction to release the state of the nozzle 6 and the valve 3 being co-axial.

Description

Sprinkler head

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

The sprinkler head is provided on a ceiling surface or a wall surface in a building, and has a nozzle that can be connected to a pipe connected to a water supply source at one end, and a thermal decomposition part at the other end. The valve body of the closed nozzle is supported by the heat-acting part.

As an example of the above-described sprinkling head, there is a sprinkler head corresponding to a negative pressure sprinkling device which is a negative pressure in a pipe (see, for example, Patent Document 1).

The sprinkler head of Patent Document 1 shown in Fig. 9 is provided with a "spring" for biasing the "sealing plate" of the nozzle that is connected to the water supply pipe in a direction separating from the nozzle end. In the case of the "sealing plate", the "sealing plate" is supported by a thermal decomposition unit in which a "low melting point alloy" is incorporated. However, when the "low melting point alloy" is melted by the heat of fire, the thermal decomposition portion is decomposed and activated, and the "sealing plate" is supported. It is released so that the "sealing plate" can be opened from the nozzle end. At this time, although the inside of the nozzle is a negative pressure and the "sealing plate" is in a state of being attracted to the nozzle end, the negative pressure in the nozzle is resisted by the elastic pressure of the "spring", and the "sealing plate" is separated from the nozzle end. Open the nozzle.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 11-206908

The sprinkler head exerts a force on the entire circumference of the "sealing plate" by the "spring", but the larger the nozzle diameter, the greater the elastic pressure of the "spring". In addition, there is a problem in that it is necessary to prevent the "sealing plate" which has been separated from the nozzle from being sucked by the negative pressure in the nozzle and to block the nozzle again.

Therefore, in view of the above problems, in view of the above problems, it is possible to provide a valve body which is disposed on a sprinkler head of a negative pressure sprinkling device from the nozzle end with a small force, and can prevent the negative pressure in the nozzle from being caused by the negative pressure in the nozzle. The valve body separated from the nozzle is attracted to block the sprinkler head of the nozzle again.

To achieve the above object, the present invention provides the following sprinkler heads.

That is, the present invention is characterized in that a nozzle at one end of the body is connectable to a pipe connected to a water supply source, and is coupled to the front end of the frame portion extending in the direction of water discharge from the vicinity of the outlet of the nozzle and by fire. The valve body blocking nozzle supported by the thermal decomposition unit that is thermally decomposed and actuated, and the spring disposed near the nozzle outlet separates the valve body from the nozzle outlet, and the spring biases the valve body toward the direction in which the nozzle and the valve body are coaxial. .

The sprinkler head of the above structure is disposed on the inside of the pipe as a negative pressure, that is, a negative pressure sprinkler. When the thermal decomposition unit is actuated by the heat of the fire to release the support of the valve body, the valve system is separated from the nozzle outlet by the force of the spring and opened. Further, in order to maintain the state in which the valve body is separated from the nozzle outlet, the valve body is prevented from being sucked again due to the negative pressure in the nozzle and the nozzle is blocked by not making the shaft of the nozzle coaxial with the shaft of the valve body.

In the state in which the valve body is closed, the shaft of the coaxial nozzle and the shaft of the valve body When the valve body is opened, the coaxial state of the shaft of the nozzle and the shaft of the valve body is released. When the valve body is opened, if the nozzle and the valve body are in a coaxial state, the valve body is easily attracted to the nozzle side due to the negative pressure in the nozzle, but the nozzle and the valve body are not in the state in which the valve body is opened. In the case of coaxiality, the range in which the force of the valve body is attracted to the nozzle side by the negative pressure in the nozzle is reduced. Specifically, when the axis of the nozzle is parallel to the axis of the valve body and has a predetermined interval between the two shafts, the negative pressure in the nozzle acts on the area of the valve body, or the axis of the valve body is opposite to the nozzle. When the shaft is inclined, the valve body and the outlet end of the nozzle are spaced closer to the valve body and the farther portion, and in the farther portion, the suction force is reduced by the negative pressure in the nozzle, so It is possible to suppress the valve body from being attracted to the nozzle side.

In the above invention, the spring is attached to the valve body, and the central axis of the valve body is inclined with respect to the central axis of the nozzle in a state where the spring is unloaded.

Thereby, when the sprinkler head is actuated and the valve body is disengaged from the nozzle by the action of the spring, since the central axis of the valve body is inclined with respect to the central axis of the nozzle, the valve body collides with the inclined state when the water is released from the nozzle. . Since the valve body is inclined, the valve system is scattered in the oblique direction, and is released to the outside of the sprinkler head without interference with the returning plate provided on the extension of the central axis of the nozzle. Alternatively, the spring pressure can be increased and the spring body can be used to fly the valve body to the outside of the sprinkler head when the sprinkler head is actuated. Further, in the downward-type sprinkler head which is disposed downward in the discharge direction of the nozzle, when the sprinkler head is actuated, the valve body is displaced obliquely downward from the nozzle end by its own weight and the biasing force of the spring, so that it is not provided The return plate of the nozzle is extended on the return plate to interfere with the valve The body and spring are released to the outside of the sprinkler head.

In the above aspect of the invention, the one end side of the spring holds the valve body holding portion of the valve body, and the other end side is configured as a support portion provided in the vicinity of the nozzle.

When the spring is formed thereby, the linear spring material can be bent. Alternatively, the flat spring material may be formed by forming a valve body holding portion on one end side and a support portion on the other end side. At this time, if the valve body holding portion is bent so as to cover the upper surface and the lower surface of the valve body so as to cover the upper surface and the lower surface of the valve body, the valve body can be fixed to the spring. Moreover, with the above configuration, the spring itself can be increased, and the displacement amount or the spring pressure of the spring can be increased.

In the above aspect of the invention, the support portion of the spring is inserted through the annular projection of the nozzle outlet.

By providing the support portion of the spring through the annular projection of the nozzle outlet, the support portion of the spring and the nozzle can be coaxially disposed when the sprinkler head is assembled.

In the above aspect of the invention, the connection portion connecting the valve body holding portion and the support portion is disposed in a direction rotated by 90° from the frame.

Thereby, the axis of the valve body can be prevented from facing the frame when the sprinkler head is actuated, and the valve body can be prevented from colliding with the frame by the water potential released from the nozzle.

In the above aspect of the invention, the spring biases a portion on the nozzle side of the valve body from a portion of the outer peripheral portion of the outer side of the nozzle.

Therefore, in the previous sprinkler head, since the spring applies a force to the entire circumference of the valve body, and the direction in which the spring applies the force to the valve body is the discharge direction of the nozzle, if the pressure is greater than the negative pressure applied to the valve body , the valve body will not open start. In the sprinkler head of the present invention, the shaft of the nozzle of the valve body and the shaft of the valve body are in different directions, for example, by biasing the spring to concentrate only on one part of the outer circumference of the valve body, and continuously lifting or releasing the force such as tilting The force of the coaxial state of the valve body and the nozzle acts on the valve body. When the thermal decomposition portion is deactivated, the valve body is tilted and the valve body and the nozzle are released from each other by the spring, and the nozzle outlet is released. Therefore, the nozzle can be opened with a small force. For example, when the suction cup that is adsorbed to the glass is removed, it is difficult to remove the suction cup even if the center portion of the suction cup is pulled, but if the edge of the suction cup is lifted, the suction cup can be easily removed.

In the above invention, the spring has a ring shape having a notch, and the ends are bent in a direction in which they are separated from each other.

By forming the spring in a ring shape, it is possible to provide a spring that is inserted into the outer circumference of the nozzle outlet, whereby the spring that only exerts a force on only one of the outer peripheral portions of the valve body can be positioned.

Further, by bending the ends of the ring in directions separating from each other, the amount of displacement in the direction of the axis of the ring can be secured in the notch portion, and only the portion connected to the notch portion of the valve body can be biased.

In the present invention, the spring is formed in a ring shape, and one of the peripheral edges of the ring is formed to extend outward, and the extending portion is bent to form a leaf spring portion.

As described above, the spring can be disposed to be inserted into the outer periphery of the nozzle outlet by the annular shape, and the leaf spring portion can be formed by extending one of the circumferential edges of the ring and bending the extending portion. Apply force only to the part of the valve body that is in contact with the leaf spring.

With regard to the above invention, the valve system locks the spring locking portion of the spring Formed on the outer circumference of the valve body.

Since the valve body is provided with the spring locking portion of the locking spring, the spring pressure can be applied only to the spring locking portion, so that the force of the valve body tilting action can be applied.

In the present invention, the spring is formed with a joint portion that prevents rotation and the body.

By providing the merging portion with the body, the spring can be prevented from rotating and deviating from the predetermined urging position.

With respect to the present invention, the sprinkler head nozzle has a water discharge direction upward and upward type sprinkler head.

By applying the spring to the upward sprinkler head, the valve body can be surely separated from the nozzle end and opened when the thermal decomposition portion of the sprinkler head is actuated. Moreover, the valve body can be released to the outside of the sprinkler head by the water released from the nozzle.

As described above, according to the present invention, it is possible to provide a sprinkler head in which a valve body provided in a sprinkler head of a negative pressure sprinkling device is biased by a spring and can be opened with a small force by tilting the valve body in an inclined state. The valve body is separated from the nozzle end, and the valve body that has been separated from the nozzle is prevented from being attracted by the negative pressure in the nozzle to block the nozzle again.

First embodiment (Fig. 1 to Fig. 5)

The sprinkler head according to the first embodiment will be described below with reference to Figs. 1 to 5 .

The sprinkler head A is composed of a main body 1, a water return plate 2, a valve body 3, a thermal decomposition portion 4, and a heat sensitive body 5.

The main body 1 has a male thread which is connected to the piping of the fire extinguishing device on the outer peripheral surface, and a nozzle 6 for releasing water in the piping is bored inside. Two frames 7 extending from the end surface 6A toward the water discharge direction of the nozzle 6 (the upper direction in FIGS. 1 and 2) are provided in the vicinity of the end surface 6A on the outlet side of the nozzle 6, and a nozzle is formed on the frame 7 A sleeve portion 8 that intersects on the axis of 6.

A water return plate 2 that collides with water released by the nozzle 6 and scatters around is fixed to the front end of the boss portion 8. The water return plate 2 has a disk shape, and a plurality of notches are formed on the periphery (the illustration of the notch is omitted in FIG. 2). A female screw 8A is formed inside the boss portion 8. The embossed screw 21 is screwed into the female screw 8A, and the sensible thermal decomposition portion 4 is locked at the front end of the embossed screw 21.

A flange portion 6B for locking the spring S described below is formed between the frames 7 and 7 on the outlet side of the nozzle 6, and a recess portion 6C is formed in the flange portion.

The valve body 3 is configured to block the nozzle 6, and is disposed at the outlet end of the nozzle 6, and is pressed to the nozzle 6 side by the thermal decomposition unit 4 described below. A sealing material 3A is interposed between the valve body 3 and the end surface 6A of the nozzle 6. The sealing material 3A may be attached to the valve body 3 side by an adhesive or 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, and a part of the outer peripheral portion of the valve body 3 is biased in the direction in which the valve body 3 is opened. As shown in FIG. 3, the spring S has an annular shape and is inserted from the nozzle end face 6A to the outer peripheral portion of the nozzle 6. An extension S1 (shown by a broken line in FIG. 3) extending outward is formed on one of the outer circumferences of the spring S, and the extension S1 is bent to provide a spring portion S2. The spring portion S2 may also extend from the inner circumference of the ring portion to the inside. Set.

By the spring portion S2, only one portion of the outer peripheral portion of the valve body 3 is biased in the opening direction, so that when the thermal decomposition portion 4 is decomposed, the valve body 3 can be self-nozzled by the action of the spring portion S2. 6A separation.

A splicing portion S3 that extends to the flange portion 6B of the main body 1 is formed on a side opposite to the spring portion S2. The front end S4 of the engaging portion S3 (shown by a broken line in the drawing) is formed to have a large width, and when the spring S is inserted into the outer peripheral portion of the nozzle 6, the engaging portion S3 is coupled to the flange portion 6B. When the inside of the recessed portion 6C is bent, the front end S4 is engaged with the flange portion 6B.

The engagement of the engaging portion S3 with the inner side of the recessed portion 6C has an effect of preventing the rotation of the spring S. Further, by engaging the front end S4 of the engaging portion S3 with the flange portion 6B, the spring S is prevented from coming off. In the above embodiment, the engaging portion S3 is provided only at one place. However, since the recessed portion 6C of the main body 1 has two places, the two engaging portions S3 may be provided in correspondence therewith. At this time, the extending portion S1 may be disposed between the two engaging portions S3, for example, on one of the frames 7 side.

The thermal decomposition unit 4 is composed of a rod 10, a column 11, and a balance 12. The thermosensitive decomposition unit 4 is configured by combining the respective components and the following heat sensitive body 5, and is assembled in a state in which a load is applied to each of the components.

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

The pillar 11 has a substantially elliptical shape and is provided with a hole 11A in the center, and The branch 11B from the end of the hole is bent outward from the hole 11A, and the support branch 11C from the other end of the hole 11A is bent in the same direction as the tie branch 11B. Both ends of the strut 11 are blade-shaped.

One end of the balance 12 is a sickle shape having a wide width, and a hemispherical projection 12A is formed in a wide portion, and a fitting portion 12B bent in an oblique direction is formed at the other end.

The heat sensitive body 5 is composed of a cylinder 14, a soluble alloy 15 and a piston 16, and the cylinder 14 has a bottomed cylindrical shape and is filled with a soluble alloy 15 therein. The soluble alloy 15 is integrally molded by injecting an alloy material in a molten state into the cylinder 14 to be hardened. Further, the illustrated soluble alloy 15 may be inserted into the interior of the cylinder 14 in advance to be integrally molded. A mortar-shaped engagement hole 14A is formed on the outer side of the bottom surface of the cylinder 14.

The heat-sensitive body 5 having the above-described configuration is incorporated in the rod 10, the support 11, and the balance 12 to constitute a unit of the thermal decomposition unit 4. The composition of the display unit is shown below.

The hemispherical groove 10A of the rod 10 is engaged with the hemispherical front end of the embossed screw 21, and the end of the rod 10 is engaged with the engaging portion 12B of the balance 12. Further, the V-shaped groove 10B of the rod 10 is engaged with one end of the strut 11, and the other end of the strut 11 is engaged with the V-shaped groove of the valve body 3. The balance 12 that is engaged with the end of the rod 10 is inserted into the hole 11A of the strut 11, and the lower surface portion of Fig. 2 is attached to the support branch 11C of the strut 11.

The engagement hole 14A of the cylinder 14 is incorporated in the branch 11B of the pillar 11. The hemispherical projection 12A of the balance 12 is fitted into the hole 16A of the piston 16 inserted into the cylinder 14.

When the female screw 8A of the boss portion 8 of the main body 1 is screwed into the embossed screw 21, the front end of the embossed screw 21 applies a load to the thermal decomposition portion 4, and the valve body 3 is pressed to the nozzle 6 side to block the nozzle 6. .

In the thermal decomposition unit 4, the valve body 3 and the embossed screw 21 are continuously loaded with a load, and the force is applied from the branch 11B of the strut 11 to the cylinder 14, and the hemispherical projection 12A of the balance 12 is applied. The piston 16 exerts a force to apply a 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 disposed on a negative pressure sprinkler and is maintained in a negative pressure within the piping. The negative pressure watering device is described in Japanese Patent No. 3264939 or Japanese Patent Application Publication No. 2004-201746, and the detailed description is omitted.

As shown in FIG. 5, the sprinkler head A is disposed in such a manner that the male thread 5 of the sprinkler head SH is connected to the erecting portion 131 of the fire extinguishing equipment pipe P disposed in the lower side of the roof 130, and the water returning plate 2 And the discharge direction of the nozzle 6 is toward the roof 130 side (upward).

A fire sensor K is disposed near the sprinkler head A. When the fire sensor K senses a fire, the water supply device is activated to supply water to the pipe P.

When a fire occurs, the ambient temperature rises due to the heat of the fire and the heat is absorbed by the cylinder 14 of the sprinkler head A, so that the soluble alloy 15 in the cylinder 14 is melted. On the other hand, the fire sensor K is actuated by an increase in the ambient temperature and outputs an actuation signal.

When the soluble alloy 15 is melted, the piston 16 is immersed in the cylinder 14, and the balance of the force of the thermal decomposition portion 4 is broken, so that the balance 12 supports the branch 11C. The front end serves as a fulcrum to rotate the hemispherical projection 12A toward the piston 16 side. By the rotation of the balance 12, the lower end portion of the rod 10 is released from the engagement portion 12B of the balance 12, and the lower end portion is rotated by the hemispherical groove 10A as a fulcrum. With the rotation of the rod 10, the engagement between the strut 11 and the rod 10 is also released, and the thermal decomposition portion 4 is decomposed.

When the thermal decomposition portion 4 of the support valve body 3 is disassembled and the force for pressing the valve body 3 to the nozzle 6 side is released, the valve body 3 is opened. The spring S acts to separate the valve body 3 from the nozzle end face 6A, and the valve body 3 is disengaged from the nozzle 6, and the inside of the nozzle 6 and the pipe are pressurized to weaken the force of sucking the valve body 3, and the nozzle 6 is opened. As shown in Fig. 4, in the sprinkler head before operation (Fig. 4(a)), the shaft 6E of the nozzle 6 is coaxial with the shaft 3E of the valve body 3, but the sprinkler head after actuation (Fig. 4(b)) In the middle, the axis of the valve body 3 is inclined with respect to the axis of the nozzle 6.

The water supply device is activated by the actuation signal of the fire sensor K disposed near the sprinkler head A, so that water supply to the sprinkler head A is started, and water is released by the nozzle 6. The valve body 3 and the spring S are released to the outside of the sprinkler head A by the water potential, and the water colliding with the water return plate 2 is scattered around, thereby suppressing the fire and extinguishing the fire.

Further, a description will be given of a case where the fire sensor K is actuated after the sprinkler head A is actuated.

When the sprinkler head A is actuated by the heat of the fire, the thermal decomposition portion 4 of the support valve body 3 is decomposed and released to the outside of the sprinkler head A.

The valve body 3 is separated from the nozzle end face 6A by applying a force to the spring S, thereby opening the valve body 3 in an inclined state.

Since the air outside the tube flows into the pipe P from the nozzle 6 by the opening of the valve body 3, the pressure in the pipe P rises. When the pressure in the pipe P rises and reaches a predetermined pressure, the suction device (not shown) connected to the pipe P is actuated to reduce the pressure in the pipe P again. Since the valve body 3 is held in an inclined state by the spring S, the valve body 3 is prevented from being attracted to the nozzle end face 6A due to the negative pressure in the nozzle 6.

When the fire sensor K is actuated, the suction device is stopped and the water supply device provided on the pipe P is activated, thereby delivering pressurized water from the water source to the activated sprinkler head B. The nozzle 6 of the self-operating sprinkler head B releases water, and simultaneously releases the valve body 3 and the spring S to the outside of the sprinkler head B by the water potential. The water collides with the water return plate 2 and scatters around, thereby suppressing fire and extinguishing the fire.

Modification of the first embodiment (Fig. 6 to Fig. 8)

Modifications of the above embodiment are shown in Figs. 6 and 7 . As shown in the figure, the spring S is formed in a shape in which one of the rings has a notch, and the ends 22A and 22B of the notch portion 22 of the ring are bent in a direction in which they are separated from each other. There are shown two types of springs in Fig. 7, (a) which bends the front end of the ring before the notch is separated from each other. Although the both ends of the front end of the notch are formed by bending in the figure, it may be formed by bending only one side. Fig. 7(b) is formed by bending the entire ring so that the notched portions of the ring are separated by the ends.

Further, a modification of the valve body is shown in Fig. 8 . In the valve system shown in Fig. 8, only one of the outer peripheral portions is protruded outward to form the spring locking portion 3B.

Second embodiment (Fig. 10 to Fig. 11)

Next, the sprinkler head of the second embodiment will be described. Furthermore, related to the first The same components are denoted by the same reference numerals, and the detailed description thereof will be omitted.

In the development of the modification of the first embodiment described with reference to Fig. 6 and Fig. 7, the valve body holding portion is provided on one end side of the spring, and the support portion provided near the nozzle is provided on the other end side. . The sprinkler head B of Fig. 10 is provided with a spring 30 on the nozzle end face 6A side of the valve body 3. In the modification of the first embodiment shown in Fig. 6 and Fig. 7, only the front end portion of the spring S urges the valve body 3, and the spring 30 of the second embodiment is the valve body 3 by the valve body holding portion 31. Most of the force.

The spring 30 is configured by bending a linear spring material into a layer as shown in FIGS. 11(a) to 11(c), and is supported by a valve body holding portion 31 that holds the valve body 3 and an outlet provided near the nozzle 6. The unit 32 is configured. The valve body holding portion 31 is bent such that the linear spring material covers the upper surface and the lower surface of the valve body 3 along the outer peripheral portion of the disk-shaped valve body 3, thereby holding the valve body 3. The valve body holding portion 31 is provided on the outer peripheral side of the portion where the valve body 3 abuts against the nozzle 6, so that when the sprinkler head B is assembled, the valve body holding portion 31 is sandwiched between the valve body 3 and the nozzle 6 without being generated. The way of interference. More specifically, the valve body holding portion 31 indicated by a broken line in Fig. 11(a) is disposed on a portion of the surface of the valve body 3 on the nozzle 6 side, and is indicated by a chain double-dashed line in the same figure. The annular projection portion 33 is configured such that the dotted line portion is disposed outside the outer diameter of the annular projection portion 33.

The support portion 32 is bent into a rectangular shape, and the inner portion is inserted through the annular projection portion 33 of the outlet end of the nozzle 6 which is formed to protrude from the vicinity of the root portion of the frame 7 toward the boss 8 side. In the above configuration, the support portion 32 is formed in a rectangular shape. However, the support portion 32 is not limited thereto, and may be formed in a circular shape. Also, it can be like a spiral The spring portion is formed in a spiral shape to form the support portion 32, so that the spring pressure of the spring 30 can be increased. More specifically, the elastic force toward the water discharge direction of the nozzle 6 is obtained by the support portion 32 which is formed in a spiral shape, and the elastic direction toward the axis 36 of the nozzle 6 is obtained by the joint portion 34 described below. The pressure, whereby the spring 30 is biased upwards. Thereby, when the sprinkler head B is actuated, the support portion 32 can be detached from the annular projection portion 33 of the nozzle 6 by the action of the spring 30, and the valve body 3 and the spring 30 can be released to the outside of the sprinkler head B.

A connection portion 34 is formed between the valve body holding portion 31 and the support portion 32. In the normal state (the state before the sprinkling head B is actuated), as shown in FIG. 10, the connecting portion 34 is pressed and fitted into the thermal decomposition portion 4 between the valve body 3 and the embossed screw 21 to be bent.

When the sprinkler head B is actuated to release the thermal decomposition unit 4 to the outside of the sprinkler head B, the joint portion 34 is restored to the initial linear shape as shown in Fig. 11(b), thereby keeping the shaft 35 of the valve body 3 inclined. The state of the shaft 36 of the nozzle 6. The more the length of the joint portion 34 is increased, the greater the distance the valve body 3 leaves the nozzle 6 when the sprinkler head B is actuated.

Moreover, the angle between the valve body holding portion 31 and the support portion 32 is set to a predetermined angle θ. The angle θ-spring 30 is at intervals of 15° to 50° in the unloaded state, more preferably 20° to 40°. By having the inclination of the angle θ, the valve body 3 can be released to the outside of the sprinkler head by the water released from the nozzle 6. When the valve body holding portion 31 and the support portion 32 are held in parallel, the valve body 3 is scattered in the direction of the sleeve 8 due to the water released from the nozzle 6, and is stuck in the water return plate. 2 is the edge of the periphery.

Thereby, even if the inside of the piping to which the sprinkler head B is connected is in a state of negative pressure, It is also possible to prevent the valve body 3 from being attracted to the nozzle 6 side and to block the nozzle 6 again. Further, since the shaft 35 of the valve body 3 and the shaft 36 of the nozzle 6 are not coaxial, the valve body 3 can be released to the outside of the sprinkler head B by the flow of water when the sprinkler head B is actuated to release water from the nozzle 6.

A tying portion 37 that can be coupled to the body 1 is provided in the support portion 32. The engaging portion 37 is formed at the end of the support portion 32 and is coupled to the inside of the recess 6C formed in the vicinity of the nozzle 6 of the body 1. Thereby, the rotation of the spring 30 can be prevented, so that the biasing position of the spring 30 can be maintained.

When the engaging portion 37 is formed in the vicinity of the connecting portion 34, when the engaging portion 37 is engaged with the recessed portion 6C formed between the pair of frames 7 and 7, and the sprinkling head B is actuated, the shaft of the valve body 3 can be prevented. 35 is oriented in the direction of the frame 7. Thereby, it is possible to prevent the valve body 3 from colliding with the frame 7 when it scatters due to the flow of water released from the nozzle 6.

Further, in the spring 30 of the second embodiment, the spring S of the first embodiment is increased in size by the valve body holding portion 31 biasing most of the valve body 3, and the spring 30 is biased or The amount of displacement is also larger than that of the spring S of the first embodiment.

More specifically, in the spring S of the first embodiment, only one of the outer peripheral portions of the valve body 3 is biased by the spring portion S3, and the spring 30 of the second embodiment holds the valve body 3 by the spring 30. Most of the outer peripheral portion, and the displacement amount of the valve body 3 in the state after the sprinkling head B is actuated (Fig. 11 (b)) also increases. However, in the state in which the sprinkler head B is placed (Fig. 10), the size of the spring 30 as a whole is substantially the same as that of the spring S of the first embodiment, so that the installation position of the spring 30 is the same as that of the spring S of the first embodiment. The sample is placed near the outlet end of the nozzle. In the present embodiment, there is an advantage that the amount of displacement of the valve body 3 can be increased by the spring 30 and the installation space of the spring 30 can be accommodated in a small size.

Modification 1 of the second embodiment (Fig. 12)

Next, a modification of the second embodiment will be described. The spring 40 shown in FIG. 12 is in the shape of a leaf spring folded in two, and a recess 41 is provided as a valve body holding portion on one of the pieces 40a, and an outlet end through which the nozzle 6 can be inserted is formed in the other piece 40b. The hole 42 of the annular projection 33 serves as a support portion.

The recess 41 has a circular shape with an inner diameter slightly larger than the outer diameter of the valve body 3. An inner flange 41a is formed in the recess 41, and the outer peripheral portion of the valve body 3 is locked to the inner flange 41a. The outlet end of the nozzle 6 is in contact with the valve body 3 on the inner side of the inner flange 41a, and the inner flange 41a is sandwiched between the valve body 3 and the nozzle 6 without interference.

The middle of the sheet 40a and the sheet 40b is a bent portion 43, and corresponds to the joint portion 34 of the second embodiment. When the bent portion 43 is in the unloaded state, the angle between the sheet 40a and the sheet 40b is maintained at a predetermined angle. It is between 15° and 50° in the unloaded state, and more preferably 20° to 40°. In the no-load state shown in Fig. 12(b), the shaft 44 of the valve body 3 is inclined with respect to the shaft 45 of the hole 42, whereby the valve body 3 can be released to the sprinkle by the water released from the nozzle 6. The outside of the water head. Since the hole 42 is inserted through the annular projection 33 of the nozzle 6, the shaft 45 of the hole 42 is coaxial with the shaft 36 of the nozzle 6.

Further, by providing the bent portion 43 in a direction rotated by 90° from the direction in which the frames 7 and 7 are provided, it is possible to prevent the shaft 44 of the valve body 3 from facing the frame 7 when the sprinkling head is actuated. Thereby, the valve body 3 can be prevented from being released from the nozzle 6. The water collides with the frame 7 when it scatters.

Further, as shown in FIG. 12(c), the edge of the recess 41 is formed. The glyph 46 is provided to define a claw portion 47 formed between the notch 46 and the recess 41. When the valve body 3 is housed in the recessed portion 41 and the claw portion 47 is bent inside the recessed portion 41, the claw portion 47 is displayed in a broken line, and the upper surface and the lower surface of the valve body 3 can be covered. The valve body 3 is held so that the valve body 3 can be fixedly disposed to the spring 40.

Modification 2 of the second embodiment (Fig. 13)

A modification of the second embodiment different from the above will be described. The spring 50 shown in FIG. 13 is in the shape of a leaf spring folded into three, and a hole 51 is provided as a valve body holding portion on one of the pieces 50a, and an outlet end which can be inserted into the nozzle 6 is formed on the other piece 50b. The hole 52 of the annular projection 33 serves as a support portion. Between the sheets 50a and 50b is a joint portion 50c.

The hole 51 has a circular shape with an inner diameter smaller than the outer diameter of the valve body 3 and larger than the outer diameter of the outlet end of the nozzle 6. Normally, the outer peripheral portion of the valve body 3 is pressed to the outlet end of the nozzle 6 in a state in which the outer peripheral portion of the valve body 3 is in contact with the peripheral portion of the hole 51. The spring 50 biases the outer peripheral portion of the valve body 3. The configuration of the hole 51 can be replaced with the recess 41 which is the same as the above-described modification 1.

The connecting portion 50c has a function 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 an unloaded state. Normally (the state before the sprinkling head is actuated), the joint portion 50c is folded between the sheets 50a, 50b, and the shafts 53, 54 are coaxial. However, in the state in which the sprinkler is actuated, the coaxial state of the holes 51, 52 is released. So that the axes are separated by a gap. Thereby, the valve body 3 can be prevented from being caused by the negative pressure in the nozzle 6 after the sprinkling head is actuated. It is attracted to the side of the nozzle 6 to block the nozzle 6.

Further, since the shaft 53 of the hole 51 for accommodating the valve body 3 and the shaft 54 of the hole 52 inserted into the annular projection 33 of the nozzle 6 have a predetermined interval, the spring 50 is held while the sprinkler is actuated. The sheet 50a of the valve body 3 is rotated by the sheet 50b as a fulcrum by the restoring force of the spring 50 and the weight of the valve body 3, so that the spring 50 and the valve body 3 can be released to the outside of the sprinkler head.

1‧‧‧ Ontology

2‧‧‧Backwater board

3‧‧‧ valve body

3A‧‧‧ Sealing material

3B‧‧‧Spring card stop

3E, 6E, 44, 45, 53, 54‧‧‧ axes

4‧‧‧ Thermal Decomposition Department

5‧‧‧Thermal body

6‧‧‧ nozzle

6A‧‧‧Nozzle end face

6B‧‧‧Flange

6C, 41‧‧ ‧ recess

7‧‧‧Frame

8‧‧‧ bushings

8A‧‧‧ female thread

10‧‧‧ rods

10A, 20‧‧‧ hemispherical trough

10B‧‧‧V-groove

11‧‧‧ pillar

11A, 16A, 42, 51, 52‧ ‧ holes

11B‧‧‧

11C‧‧‧Support branch

12‧‧‧ Balance

12A‧‧‧hemispherical protrusion

12B, 37, S3‧‧‧ Department

14‧‧‧ cylinder

14A‧‧‧Close hole

15‧‧‧Soluble alloy

16‧‧‧Piston

21‧‧‧ embossed screws

22‧‧‧ nicks

22A, 22B‧‧‧ the end of the gap

A, B, SH‧‧‧ sprinkler head

K‧‧ fire detector

S1‧‧‧Extension

S2‧‧·Spring Department

S4‧‧‧ front of the department

P‧‧‧Pipe

30, 40, S‧‧ springs

31‧‧‧ valve body retention department

32‧‧‧Support

33‧‧‧ annular protrusion

34, 50c‧‧‧ Linkage Department

35‧‧‧Axis of the valve body

36‧‧‧Axis of the nozzle

40a, 40b, 50a, 50b‧‧‧

41a‧‧‧Internal flange

43‧‧‧Deformation Department

46‧‧‧ gap

47‧‧‧ claws

130‧‧‧ Roof

131‧‧‧立部

Θ‧‧‧ angle

X, Y‧‧ direction

Figure 1 is a front elevational view of the sprinkler head of the present invention.

Figure 2 is a cross-sectional view taken along line X-X of Figure 1.

Figure 3 is a cross-sectional view taken along line Y-Y of Figure 1.

Figure 4 is an enlarged cross-sectional view of the valve body portion of Figure 2: (a) is normal, and (b) is actuated.

Figure 5 is a system diagram of a sprinkler apparatus provided with a sprinkler head of the present invention.

Fig. 6 shows a modification of the leaf spring: (a) is normal, and (b) is actuated.

Figure 7 is a side view of the leaf spring of Figure 6.

Fig. 8 is a modification of the valve body: (a) an enlarged cross-sectional view of the valve body portion, and (b) a plan view of the valve body.

Figure 9 is a cross-sectional view of a prior sprinkler head.

Fig. 10 is a cross-sectional view showing a sprinkler head according to a second embodiment.

Figure 11 (a) is a plan view of only the valve body and the spring portion of Figure 10, (b) is an enlarged cross-sectional view of the valve body portion of Figure 10 (after actuation), and (c) is a side view of only the spring portion.

Fig. 12 (a) is a perspective view showing a spring modification 1 of the second embodiment, (b) an enlarged cross-sectional view (after actuation) of a valve body portion in which the sprinkler head of the spring is incorporated, and (c) a plan view of the spring piece 40a in a state in which a claw portion is provided.

Fig. 13 (a) is a perspective view showing a spring modification 2 of the second embodiment, and Fig. 13 (b) is a state in which the spring is attached to the sprinkler head (only the spring is shown).

1‧‧‧ Ontology

2‧‧‧Backwater board

3‧‧‧ valve body

4‧‧‧ Thermal Decomposition Department

5‧‧‧Thermal body

6‧‧‧ nozzle

6B‧‧‧Flange

8‧‧‧ bushings

8A‧‧‧ female thread

10‧‧‧ rods

10A, 20‧‧‧ hemispherical trough

10B‧‧‧V-groove

11‧‧‧ pillar

11A, 16A‧‧ hole

11B‧‧‧

11C‧‧‧Support branch

12‧‧‧ Balance

12A‧‧‧hemispherical protrusion

12B‧‧‧ Department

14‧‧‧ cylinder

15‧‧‧Soluble alloy

16‧‧‧Piston

21‧‧‧ embossed screws

A‧‧‧Sprinkler

S‧‧ ‧ spring

Claims (14)

A sprinkler head characterized in that: at one end of the body, there is a nozzle connectable to a pipe connected to a water supply source, and is coupled to the front end of the frame portion extending from the vicinity of the outlet of the nozzle to the water discharge direction and is heated by fire The valve body blocking nozzle supported by the decomposing thermal decomposition unit and the spring disposed near the nozzle outlet separate the valve body from the nozzle outlet, and the spring biases the valve body in a direction in which the nozzle is in a coaxial state with the valve body. For example, in the sprinkler head of claim 1, wherein the valve body is provided with a spring, and the central axis of the valve body is inclined with respect to the central axis of the nozzle in a state where the spring is unloaded. The sprinkler head according to claim 1 or 2, wherein one end side of the spring holds the valve body holding portion of the valve body, and the other end side is configured as a support portion provided in the vicinity of the nozzle. A sprinkler head according to claim 1 or 2, wherein the support portion of the spring is inserted through the annular projection of the nozzle outlet. A sprinkler head according to claim 1 or 2, wherein the spring is formed by bending a linear spring material into a layer. The sprinkler head according to claim 1 or 2, wherein the spring is formed by bending a flat spring material, and the one end side is a valve body holding portion, and the other end side is configured as a support portion provided near the nozzle. The sprinkler head according to claim 5, wherein the valve body holding portion forms and holds the valve body so as to cover the upper surface and the lower surface of the valve body along the outer peripheral portion of the valve body. For example, the sprinkler head of claim 1 or 2, where The connection portion between the valve body holding portion and the support portion is disposed in a direction rotated by 90° from the frame. The sprinkler head of claim 1, wherein the spring biases a portion of the valve body on the nozzle side of the valve body from a portion of the outer periphery of the nozzle. The sprinkler head according to claim 9, wherein the spring has a ring shape with a notch, and the ends are bent in a direction separating from each other. The sprinkler head according to claim 9 or 10, wherein the spring is annular, and one of the peripheral portions of the ring is formed to extend outward, and the extending portion is bent to form a leaf spring portion. The sprinkler head of claim 1 or 2, wherein the valve system locks the spring latching portion of the spring to be formed on a peripheral portion of the valve body. The sprinkler head of claim 1 or 2, wherein the spring is formed with a hinge portion that prevents rotation and the body. For example, the sprinkler head of claim 1 or 2, wherein the sprinkler head nozzle is in the upward direction of the water discharge direction.