JP6058092B2 - Sprinkler head - Google Patents

Description

  The present invention relates to a sprinkler head, and more particularly to the induction of a hot air flow.

  Since the heat-sensitive part exposed from the ceiling receives heat by receiving the hot air current, the heat-sensitive part needs to be exposed from the ceiling (see, for example, Patent Document 1).

JP 2011-244969 A

  As mentioned above, the sprinkler head receives heat from the heat sensitive part exposed from the ceiling as it receives a hot air flow, so the heat sensitive part needs to be exposed from the ceiling, but the heat sensitive part is exposed from the ceiling. If there was, there was a possibility of damage due to design disadvantages and external force.

  The present invention has been made to solve the above-described problems, and can reduce the exposure amount from the ceiling of the heat sensitive part, and reduce the disadvantages of conventional design and the possibility of damage due to external force. An object of the present invention is to provide a sprinkler head.

The present invention provides a sprinkler head provided with a protection means for protecting from an external force provided at a lower portion of a heat sensitive part, wherein the protection means includes a cover plate , and includes a thermal airflow guiding portion formed along the outer periphery thereof. The guide portion is formed in a taper shape with a diameter decreasing upward, and is disposed in a state where a gap is formed between the guide portion and the outside, and the cover plate is arranged in the center direction from the outer edge side. 3 or more plate members that are erected along the widest side surface are provided on the radiation toward the surface .

  According to the sprinkler head according to the present invention, the provision of the above-described configuration makes it easy for the thermal air current to be guided inside the head, and the sensitivity is lowered even if the exposure amount of the heat sensitive part from the ceiling is reduced. It works less, and the disadvantages of conventional designs and the possibility of damage due to external forces are reduced.

It is a longitudinal cross-sectional view of the sprinkler head which concerns on Embodiment 1 of this invention. FIG. 2 is a partial cross-sectional view of the sealing plate of FIG. 1. FIG. 3 is a perspective view of the sealing plate of FIG. 2. It is sectional drawing which shows the modification (the 1) of the sealing plate of FIG. It is sectional drawing which shows the modification (the 2) of the sealing plate of FIG. It is the top view and front view of a cover plate which concern on Embodiment 2 of this invention. FIG. 7 is a longitudinal sectional view and a partial sectional view of the sprinkler head with the cover plate of FIG. 6 attached thereto. It is the top view and front view of a cover plate which concern on Embodiment 3 of this invention. It is a longitudinal cross-sectional view of the sprinkler head in a state where the cover plate of FIG. 8 is attached. It is the front view and top view of a protection net | network which concern on Embodiment 4 of this invention. It is a longitudinal cross-sectional view of the sprinkler head in a state where the protective net of FIG. 10 is attached. It is sectional drawing which shows the state at the time of water discharge of the sprinkler head of FIG. It is sectional drawing which shows the modification (the 3) of the sealing plate of FIG.

Embodiment 1 FIG.
FIG. 1 is a longitudinal sectional view of a sprinkler head according to Embodiment 1 of the present invention.
First, an outline of the configuration of the sprinkler head will be described.
The sprinkler head includes a head body 1 at the top. The head main body 1 has a water discharge port 2 inside, and a collar part 3 is provided at a lower part thereof, and a cylindrical frame 4 is attached to the collar part 3. The water outlet 2 is closed by a valve body 5, and the space between the water outlet 2 and the valve body 5 is sealed by a seal member 7. A stopper ring 10 attached to the upper end edge of the connecting rod of the deflector 8 that slides and falls is disposed in the cylindrical frame 4.

  The sprinkler head includes a heat sensitive plate 18 in the lower part. The heat sensitive plate 18 includes a bottomed cylindrical body 19, a thermal sensitive blade 18 a provided integrally with the bottomed cylindrical body 19, and a thermal sensitive auxiliary blade 18 b provided at the upper end of the bottomed cylindrical body 19. Has been. A cylinder 22 is fitted to the upper end portion of the heat sensitive plate 18 so as to hold the heat sensitive auxiliary blade 18b.

  The cylinder 22 is formed to have a lower thermal conductivity than the heat sensitive plate 18. Specifically, the cylinder 22 is made of stainless steel, and the heat sensitive plate 18 is made of brass. This is to prevent the heat of the heat sensitive plate 18 from escaping to the cylinder 22 via the bottomed cylindrical body 19.

  The heat-sensitive auxiliary blade 18b of the heat-sensitive plate 18 is provided to assist heat reception of the heat-sensitive blade 18a.

  A piston rod 15 that supports the link mechanism 51 is loosely mounted on the cylinder 22 and the bottomed cylinder 19, and a soluble alloy 20 and a compression piston 25 are sequentially inserted into the bottomed cylinder 19, and the piston rod 15 is pressed.

  The link mechanism 51 is a link mechanism for pressing and sealing the valve body 5 against the water outlet, and is configured as follows. That is, the balancer 12 is disposed on the lower surface of the cover plate of the arm guide 11, and a support receiving groove for supporting the protrusion 5 c of the valve body 5 is formed at the center of the balancer 12. The balancer 12 is supported by the tops of a pair of arms 13 in which engaging portions are suspended from the load adjusting slits of the cylindrical frame 4. The pair of arms 13 and 13 are supported by a link pressing plate 14, the link pressing plate 14 is fixed to the upper end portion of the piston rod 15, and the lower end portions of the arms 13 and 13 are held by an arm support plate 23. Yes.

  A sealing plate 100 is attached to the head main body 1 so as to close a gap with the opening 90 for attachment. Details of the sealing plate 100 will be described with reference to FIGS.

2 is a partial cross-sectional view of the sealing plate of FIG. 1, and FIGS. 3A and 3B are perspective views thereof.
Since the sealing plate 100 is joined to the head body 1, a cylindrical part 101 with a part cut away in the circumferential direction, a flange part 102 formed at the lower end of the cylindrical part 101, and a ring shape (annular) And a formed member 103. The flange portion 102 has a size that can cover the opening 90 of the ceiling plate. The ring-shaped member 103 is attached to the flange portion 102 via a rib 104. The ring-shaped member 103 has an opening through which the heat-sensitive plate 18 passes at the center, and the bottom surface of the ring-shaped member 103 and the bottom surface of the heat-sensitive plate 18 are substantially at the same height when the sprinkler head is installed. The ring-shaped member 103 is connected to the flange portion 102 via the rib 104. The ribs 104 are provided radially, and the height of the ribs is about 2 to 20 mm. That is, the flange portion 102 and the ring-shaped member 103 are separated by about 2 to 20 mm. Moreover, the peripheral part of the ring-shaped member 103 is a cross-sectional triangle whose thickness becomes thinner toward the outer peripheral side, and constitutes the guiding part 105 along the outer peripheral direction. In other words, the guiding portion 105 is formed in a tapered shape by contracting upward, and guides the hot air flow obliquely upward to guide it toward the heat sensitive plate 18 side.

Next, the operation of the above sprinkler head will be described.
When a hot air flow is generated by a fire, the hot air flow is guided obliquely upward by the guide portion 105 of the sealing plate 100 to heat the heat sensitive plate 18, the bottomed cylindrical body 19, etc., and melt the soluble alloy 20. When the fusible alloy 20 is melted, the compression piston 25 slides while being guided by the cylinder 22 and the bottomed cylindrical body 19. By the sliding of the compression piston 25, the link mechanism 51 is disassembled. By disassembling the link mechanism 51, the valve body 5 moves away from the water outlet 2 and the deflector 8 slides downward. The fire extinguishing water discharged from the water outlet 2 collides with the deflector 8 and its scattering direction is adjusted. The water is sprayed in a predetermined direction.

  As described above, according to the present embodiment, the sealing plate 100 includes the guide portion 105 and guides the hot air flow upward inside, so that the exposure amount (discharge amount) of the heat sensitive plate 18 from the ceiling. It is possible to reduce the possibility of damage due to external force. In addition, even if the guide portion 105 of the sealing plate 100 receives an external force, it is difficult for the guide portion 105 to be transmitted to the inside of the heat sensitive plate 18 and the like, and it is possible to reduce the possibility of damage due to the external force. Further, since the flange portion 102 of the sealing plate 100 covers the gap with the opening 90 for attaching the sprinkler head, there is no disadvantage in the conventional design. It is also possible to make the bottom surface of the heat-sensitive plate 18 flush with the bottom surface of the ceiling plate so that the ceiling surface is flush. In this case, the air flow is guided to the heat sensitive plate 18 and the bottomed cylindrical body 19 and the like above the lower surface of the ceiling by the guide portion 105.

  The ring-shaped member 103 of the sealing plate 100 may be provided with an annular guiding portion 105 made of a single disk, but a flat plate inclined upward toward the center is provided on the ring-shaped member 103. A plurality of surfaces may be provided so as to face the sprinkler head. In other words, a plurality of flat plates are provided so as to surround the central portion with the flat plate surface. That is, the guiding unit 105 may be integrally connected, but is not necessarily required, and may be provided separately.

Next, a modification of the above embodiment will be described.
4 and 5 are cross-sectional views of the main part of a modification of the above embodiment.
The sprinkler head in FIG. 4 is an example in which a guide portion 105 is formed in the flange portion 102 of the sealing plate 100 and a plurality of openings 110 are formed in the cylindrical portion 101 near the guide portion 105 along the circumferential direction. . The flange portion 102 has a shape with a top opening, and has a plurality of rectangular slits through which hot air flows.
The sprinkler head of FIG. 5 is provided with a guide portion 105 on the outer peripheral edge of the ring-shaped member 103, and a plurality of openings 110 along the circumferential direction in the lower portion of the cylindrical portion 101 and the flange portion 102 near the guide portion 105. Is an example in which is formed. Specifically, a plurality of openings 110 are formed in the circumferential direction in the flange portion 102 so as to communicate with the openings and a plurality of openings formed in the circumferential direction below the cylindrical portion 101 in contact with the flange portion 102. And an opening. The opening part 110 which the flange part 102 has is located above the guide part 105.
By adopting a configuration in which the opening 110 as shown in FIGS. 4 and 5 is added, the inflow amount of the hot airflow increases. Moreover, the opening part 110 which opposes the opening part 110 into which hot air flowed in becomes an exit of a hot air stream, and can be guided deeper inside. For this reason, for example, even when the heat sensitive plate 18 is not exposed from the ceiling, the hot air current can be guided to the heat sensitive plate 18.

Further, a modification of the above embodiment will be described.
FIG. 13 is a cross-sectional view of a main part of a modification of the above embodiment.
In the sprinkler head of FIG. 13, a guide portion 105 is provided on the outer peripheral edge of the ring-shaped member 103 of the sealing plate 100. The guiding portion 105 is a step portion having an L-shaped cross section, and the upper step has a smaller diameter than the lower step. As in the above-described embodiment, it is possible to guide the hot air flow to the heat sensitive plate 18 only by providing a stepped portion without making the guiding portion 105 inclined. Note that the stepped portion of the guiding portion 105 is not limited to two steps, and may be formed with any number of steps as long as the diameter of the step above the lower step is smaller.

  The induction unit 105 according to the first embodiment only needs to be below the thermal plate 18 and below the ceiling plate, and the induction unit 105 is located on the outer periphery of the thermal plate 18 to generate a hot air current. The form is not limited as long as it can be guided to the upper heat sensitive plate 18. For example, a method in which only the guide part 105 is formed as a separate part and attached below the sealing plate 100 or the heat sensitive plate 18 may be used. Needless to say, there is a gap through which the deflector 8 can be lowered at the central portion (inner diameter side) of the guide portion 105.

Embodiment 2. FIG.
6 (a) and 6 (b) are a plan view and a front view of a cover plate according to Embodiment 2 of the present invention. FIGS. 7A and 7B are a longitudinal sectional view and a partial sectional view showing how the cover plate is attached. The cover plate represents an example of the protection means of the present invention.
The cover plate 120 according to the present embodiment includes a disc 121 having an inclined upper surface at the peripheral edge, and a plurality of plates that are provided upright on the disc 121 and are radially spaced from the outer edge side toward the center. For example, five plate members 122 and a protrusion 123 provided at the center are provided. This protrusion 123 is attached to the heat sensitive plate 18 side. Further, the thermal plate 18 is located within a range where the inner peripheral ends of the plate member 122 are connected. The plate member 122 has a length exceeding at least the guide portion 105 from the outer peripheral edge toward the center. The height of the plate member is about 2 to 20 mm, and the space between the disk 121 and the lower surface of the ceiling plate is equal to or greater than the height of the plate member. In the case of FIG. 7, there is a hole in the center of the flanged piston that holds the fusible alloy 20, and a projection 123 of the cover plate 120 is press-fitted or screwed into the hole to cover the sprinkler head. A plate 120 is attached. That is, the inner diameter of the hole of the flanged piston and the outer diameter of the protrusion 123 are substantially the same. Depending on the structure of the sprinkler head, the hole is provided in the sprinkler head structure. In the case of FIG. 7, the hole is provided in the piston, but it may be provided at the lower end of the heat-sensitive part that drops when the sprinkler head operates. For example, it may be provided at the center of the heat sensitive plate 18. Further, the upper surface of the disk 121 is formed obliquely, and the peripheral edge constitutes the guiding portion 105. The material of the cover plate 120 is formed of a metal or a resin that does not melt in the hot airflow. Although the configuration of the sprinkler head in FIG. 7 is different from that of the first embodiment, it is known per se and its description is omitted.

Also in the present embodiment, since the cover plate 120 has the configuration shown in FIG. 6 and the hot air flow is guided upward inside, the exposure amount (projection amount) of the heat sensitive plate 18 from the ceiling is reduced. It is possible to reduce the possibility of damage due to external force. Since the cover plate 120 covers the sprinkler head from below, the design is excellent. In the above description, an example in which the number of the plate members 122 is five has been described. However, the number of the plate members 122 is not limited as long as the number is three or more. Further, the guidance amount of the plate member 122 increases as the thickness thereof decreases. Although only the guiding part 105 can guide the hot air flow upward, the provision of the plate member 122 can further efficiently guide the hot air flow to the heat sensitive plate 18 or the like.
In addition, the cover plate 120 includes the guide portion 105 as described above, and the above-described effects are obtained. In addition, when the sprinkler head is operated, the cover plate 120 falls simultaneously with the heat-sensitive portion. This is also excellent in this respect. If the diameter of the cover plate 120 is enlarged, the opening of the ceiling plate on which the sprinkler head is provided cannot be seen, and the function as a sealing plate is exhibited. Furthermore, if a part of the cover plate 120 is configured to partially contact the sealing plate or the ceiling, the function as a protector for protecting the sprinkler head from an external force can be exhibited.
Note that the cover plate 120 according to the second embodiment is provided with the protrusion 123 pressed into the hole in the center of the piston, but the cover plate may be attached in any way, for example, Even when it is fixed using a retainer, it has the same effect.

  In the cover plate 120 according to the second embodiment, the guide unit 105 may be any shape as long as it can guide the hot air flow to the upper heat sensitive plate 18. The same applies to the third embodiment described later.

Embodiment 3 FIG.
FIG. 8 is a plan view and a front view of a cover plate according to Embodiment 3 of the present invention. FIG. 9 is a longitudinal sectional view of the sprinkler head with the cover plate attached.

  As shown in FIG. 8, the cover plate 120 of the present embodiment includes a plate-shaped disk 126 and a protrusion 127 provided at the center. The circular plate 126 has a shape in which the periphery of the central portion protrudes and is inclined, and the protruding portion 127 is attached to the heat sensitive plate side. The inclined portion of the disk 126 forms the guiding portion 105 of the present invention. That is, unlike Embodiment 2 in which the upper surface of the disk 121 is formed obliquely and the peripheral edge portion constitutes the guiding portion 105, the peripheral edge portion of the disk 126 is a horizontal plate, and the radial direction of the upper surface of the disk 126 is A step portion whose diameter is reduced upward is formed from the center periphery to the center 127 where the protrusion is located. That is, the diameter between the guide portions 105 is about half of the diameter of the disk 126.

  The sprinkler head of FIG. 9 includes a head main body 210, a frame 220, a valve body 230, a sprinkler 240, and a valve body support mechanism 250. The valve body support mechanism 250 includes a heat sensitive part 251. Since this configuration is the same as the conventional configuration, its details are omitted.

  Also in the present embodiment, the cover plate 120 includes the guide portion 105 shown in FIG. 8 and guides the hot air flow upward in the interior. Therefore, the exposure amount (projection amount) of the heat sensitive plate 18 from the ceiling is set. Even if it is reduced, the thermal airflow hits the heat sensitive plate 18 and the like, so that the sprinkler head can be actuated at an early stage, and the same effect as the above embodiment can be obtained.

Embodiment 4 FIG.
10 (a) and 10 (b) are a front view and a plan view of a protective net according to Embodiment 4 of the present invention. FIG. 11 is a longitudinal sectional view of the sprinkler head in a state where the protective net 130 is attached. The protection network 130 shows an example of the protection means of the present invention.
The protection net 130 according to the present embodiment is configured in a net shape as shown in FIG. 10, and a projection 131 is formed at the center of the protection net 130 attached to the heat sensitive plate side. Similarly to the protrusion 123 according to the second embodiment, the protrusion 131 is press-fitted or screwed into a hole provided at the lower end of the heat-sensitive part and locked. The cross-section of the linear member constituting the protective mesh 130 is formed of, for example, a triangle. For example, it is formed from a triangle whose hypotenuse is on the outer side (outer peripheral side), and is contracted upward to form the guiding portion 105 of the present invention.

FIG. 12 is a cross-sectional view showing a state of the sprinkler head of FIG. 11 during water discharge.
As shown in FIG. 12, the protection net 130 according to the present embodiment is attached to the heat sensitive part. For this reason, if it was a conventional protection net, it was attached to the frame of the sprinkler head, so it stayed in place after the operation and there was a risk of affecting watering, but the protection net according to this embodiment is Since it falls during operation, it will not cause watering problems.

  DESCRIPTION OF SYMBOLS 1 Head main body, 2 Water discharge port, 3 collar part, 4 Cylindrical frame, 5 Valve body, 5c Protrusion, 7 Seal member, 8 Deflector, 9 Connecting rod, 10 Stopper ring, 11 Arm guide, 12 Balancer, 13 Arm, 14 Link Pressure plate, 15 Piston rod, 18 Thermal plate, 18a Thermal blade, 18b Thermal auxiliary blade, 19 Bottomed cylinder, 20 Soluble alloy, 22 Cylinder, 23 Arm support plate, 25 Compression piston, 40 Spacing adjustment part, 51 link mechanism, 90 mounting opening, 100 sealing plate, 101 cylindrical part, 102 flange part, 103 ring-shaped member, 104 rib, 105 guide part, 110 opening part, 120 cover plate, 121 disc, 122 board Member, 123 protrusion, 126 disc, 127 protrusion, 130 protective net, 131 protrusion, 210 head Body, 220 frame, 230 valve body, 240 nozzle unit, 250 valve body supporting mechanism, 251 heat-sensitive part.

Claims (3)

In the sprinkler head provided with a protective means provided at the lower part of the heat sensitive part and protected from external force,
The protection means comprises a cover plate , and includes a hot air current guiding portion formed along the outer periphery thereof,
The guide portion is formed in a tapered shape with a diameter decreasing upward, and is disposed in a state where a gap is formed between the guide portion and the outside, and is exposed to the outside.
The sprinkler head according to claim 1, wherein the cover plate includes three or more plate members that are erected along the side of the widest area on the radiation from the outer edge side toward the center . In the sprinkler head provided with a protective means provided at the lower part of the heat sensitive part and protected from external force,
The protection means comprises a cover plate , and includes a hot air current guiding portion formed along the outer periphery thereof,
The guide portion is formed in a tapered shape with a diameter decreasing upward, and is disposed in a state where a gap is formed between the guide portion and the outside, and is exposed to the outside.
The cover plate includes three or more thin plate members that are radially upright from the outer edge of the cover plate toward the center from the outer edge of the cover plate. The cover plate is heated by the plane of the plate member orthogonal to the cover plate. A sprinkler head characterized by guiding the flow toward the center . In the sprinkler head provided with a protective means provided at the lower part of the heat sensitive part and protected from external force,
The protection means is composed of a protection net , and includes a hot air current guiding portion formed along the outer periphery thereof,
The guide portion is formed in a tapered shape in which the diameter of the horizontal linear member in a state where the sprinkler head is attached to the ceiling is reduced upward, and a gap is formed between the guide portion and the outside. A sprinkler head that is arranged in an exposed state.