JP5723653B2 - Sprinkler head - Google Patents

Description

  The present invention relates to a sprinkler head.

  In a conventional sprinkler head, for example, solder is provided so as to be sandwiched between a piston and a cylinder, and a disk-like heat sensitive plate is provided on the outer periphery of the lower end of the cylinder, and above the heat sensitive plate. There is a thin heat sensitive plate that receives a hot air current to promote melting of the solder (see, for example, Patent Document 1). In this sprinkler head, the lowermost thermal plate that is in direct contact with the solder and integrated with the cylinder is in direct contact with the solder and is thicker than the other two thermal plates at the top. Has been. This is to prevent the heat sensitive plate from being deformed by a load constantly applied to the solder. This point will be described in more detail.

  The sprinkler head is always loaded with solder. This load itself is applied in the direction of crushing the solder in the vertical direction, but when the solder is crushed (spread in the lateral direction), a lateral force is generated. When the solder is pressed from above, there is a piston that is thick and somewhat strong on the lower and inner circumferences of the solder, so it cannot be deformed in that direction. Try to try to spread. In order to suppress the force of spreading, the lowermost heat-sensitive plate needs to have a predetermined thickness. If the heat sensitive plate is thin, the force to spread outward cannot be suppressed and the heat sensitive plate is deformed (spread).

Japanese Patent Laid-Open No. 2004-243032

  In a conventional sprinkler head, a thick thermal plate is preferable in terms of strength against solder that causes creep due to a load, but it has a large heat capacity and can efficiently heat the solder even in the presence of a hot airflow. There was a problem that it was not possible.

  The present invention has been made in order to solve the above-described problems, and even if the force acts on the heat-sensitive plate as the solder tries to spread laterally due to the load applied to the solder at all times, the deformation of the heat-sensitive plate is suppressed. An object of the present invention is to provide a sprinkler head that can efficiently heat solder.

A sprinkler head according to the present invention includes a heat-sensitive part comprising a plunger having a flange formed at the lower end, solder provided on the flange of the plunger, and a lower-layer heat-sensitive plate attached to the upper part of the solder and constituting a cylinder. A sprinkler head having a cylindrical reinforcing member that is provided on an outer periphery of a vertical portion of the lower-layer heat sensitive plate and suppresses a spread of the vertical portion of the heat sensitive plate in a radial direction, and the heat sensitive portion includes the heat sensitive plate. The upper layer heat sensitive plate is provided above, and the thickness of the lower layer heat sensitive plate is substantially the same as the thickness of the upper layer heat sensitive plate .
The sprinkler head according to the present invention includes a plunger having a flange formed at the lower end thereof, solder provided on the flange of the plunger, and a lower thermal plate that is attached to the upper part of the solder and constitutes a cylinder. In the sprinkler head having a heat sensitive portion, the sprinkler head includes a cylindrical reinforcing member that is provided on the outer periphery of the vertical portion of the lower heat sensitive plate and suppresses the spread of the vertical portion of the heat sensitive plate in the radial direction. An upper layer thermal plate provided above the thermal plate is provided, and the height of the reinforcing member is the same as the interval between the lower layer thermal plate and the upper layer thermal plate.
The sprinkler head according to the present invention includes a plunger having a flange formed at the lower end thereof, solder provided on the flange of the plunger, and a lower thermal plate that is attached to the upper part of the solder and constitutes a cylinder. In the sprinkler head having a heat sensitive portion, the sprinkler head includes a cylindrical reinforcing member provided on the outer periphery of the vertical portion of the lower heat sensitive plate, and suppressing the spread of the vertical portion of the heat sensitive plate in the radial direction. The thickness of the lower layer heat sensitive plate is larger than that of the lower layer heat sensitive plate.
In the sprinkler head according to the present invention, the lower layer heat sensitive plate has a lower end positioned below the lower end of the plunger, and the reinforcing member extends downward from the lower end of the plunger.

According to the sprinkler head according to the present invention, even if the solder acts to spread in the lateral direction due to the constant load applied to the solder and the force is applied to the heat sensitive plate, the tubular reinforcing member is provided. Deformation in the outer circumferential direction is suppressed. Further, since it is not necessary to increase the thickness of the heat sensitive plate, the heat capacity is not increased, and the solder can be efficiently heated. In addition, since the deformation of the thermal plate is suppressed by the reinforcing member, the thickness of the lower thermal plate can be reduced to almost the same thickness as that of the upper thermal plate , thereby reducing the sensitivity of the sprinkler head. improves.
Further, according to the sprinkler head according to the present invention, since the height of the reinforcing member is the same as the distance between the lower layer thermal plate and the upper layer thermal plate, even if an external force is applied to the lower layer thermal plate from below, Since the force can be transmitted to the upper thermal plate via the reinforcing member, deformation of the lower thermal plate can be suppressed.
Further, according to the sprinkler head according to the present invention, the reinforcing plate is provided, and the lower thermal plate is formed such that the vertical portion is thicker than the horizontal portion. Deformation is suppressed. Since only the thickness of the vertical portion of the lower heat sensitive plate is thick, the heat capacity of the lower portion is increased, but the heat sensitive plate as a whole can reduce the degree of heat capacity and can efficiently heat the solder.
Further, the lower layer heat sensitive plate has a lower end positioned below the lower end of the plunger, and the reinforcing member has a shape extending below the lower end of the plunger. For this reason, the protection effect with respect to the external force from diagonally downward is also acquired, for example, and the biting of the heat sensitive plate to the plunger can be prevented .

It is a longitudinal cross-sectional view of the sprinkler head which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the operation state of a sprinkler head. It is sectional drawing of the heat sensitive part of FIG. It is a reinforcement member top view and longitudinal cross-sectional view. It is a longitudinal cross-sectional view of the heating part of the sprinkler head which concerns on Embodiment 2 of this invention.

Embodiment 1. FIG.
FIG. 1 is a longitudinal sectional view of a sprinkler head according to Embodiment 1 of the present invention.
The sprinkler head 1 includes a head main body 10, a frame 20, a valve body 30, a water spray unit 40, and a valve body support mechanism 50.

  The head body 10 has an opening at the center. The opening 11 forms a water discharge port 12 together with a water discharge tube 16 described later. A flange 13 is formed on the outer peripheral portion of the head main body 10, and a screw portion 14 connected to the water supply pipe is formed on the outer peripheral portion of the head main body 10 on the upper side of the flange 13. A threaded portion 15 for attaching a frame 20 to be described later is formed on the inner peripheral portion on the side. A cylindrical water discharge cylinder 16 is formed on the inner side of the head body 10 so as to protrude downward. Further, for example, a flat valve seat 17 is formed at the lower end portion of the water discharge cylinder 16, and the upper surface side of the disc spring 32 is disposed so as to contact the valve seat 17. In the head body 10, a substantially hole-shaped or ring-shaped space 18 is formed between the lower inner peripheral portion of the flange 13 and the water discharge cylinder 16, and a guide rod 42 described later is formed in the space 18. Is stored.

  The frame 20 is formed in a cylindrical shape. A screw portion 21 is formed on the outer periphery of the upper portion of the frame 20 and is attached to the screw portion 15 formed on the lower side of the head body 10. A locking step portion 22 protruding inward is provided at the lower portion of the frame 20, and a ball 61 described later is locked to the locking step portion 22.

  The valve body 30 has a flange portion 31, and a disc spring 32 is disposed above the flange portion 31, and closes the water discharge cylinder 16 of the head body 10 together with the disc spring 32. The disc spring 32 is provided with a Teflon (registered trademark) sheet or a Teflon (registered trademark) coating. A head of a set screw 65 described later is in contact with the lower portion of the valve body 30. The valve body 30 is supported by a valve body support mechanism 50 described later.

  The water sprinkling unit 40 includes a deflector 41, a guide rod 42, and a stopper ring 43 (and the valve body 30). The deflector 41 is configured by a disc having an opening at the center, and is attached (fixed) to the lower surface of the flange portion 31 of the valve body 30 with the lower portion of the valve body 30 inserted into the opening. ing). In addition, the deflector 41 is provided with insertion holes (for example, three) into which guide rods 42 (for example, three) are inserted, and the lower end of the guide rod 42 protrudes from the insertion hole to the deflector 41. It is fixed. Therefore, the valve body 30, the deflector 41, and the guide rod 42 are integrally formed.

  During normal operation, the stopper ring 43 is in the position shown in FIG. 1, but during the water discharge operation, the deflector 41, the guide rod 42 and the stopper ring 43 are lowered (see FIG. 2 described later). The outer diameter of the stopper ring 43 is formed to be larger than the inner diameter of the locking step portion 22 of the frame 20, and when the valve body support mechanism 50 falls during the water discharge operation, the stopper ring 43 extends to the locking step portion 22 of the frame 20. Descend.

  The inner diameter of the hole provided in the center of the stopper ring 43 is formed to be slightly larger than the outer diameter of the water discharge cylinder 16, and a guide portion 43 a protruding downward on the edge is provided around the hole. . When the stopper ring 43 descends, the guide portion 43a guides the stopper ring 43 to the outer periphery of the water discharge tube 16 formed at the lower portion of the head body 10.

  The valve body support mechanism 50 includes a heat sensitive part 51, a ball holding mechanism 60, and a set screw 65.

  The heat sensitive part 51 includes a plunger 52, heat sensitive plates 53, 71, 72 and a heat insulating material 54. The plunger 52 is formed in a cylindrical shape, and a flange 52a is formed in the lower part. Inside the plunger 52, a female screw 52b is formed, and a male screw on a leg portion of the set screw 65 is screwed to couple the two. A donut-shaped solder 55 is inserted from the upper part of the plunger 52 and rests on the flange 52 a of the plunger 52. On top of the solder 55, there is provided a heat-sensitive plate 53 that is disk-shaped and has a crank-shaped cross section and constitutes a cylinder. That is, the heat sensitive plate 53 includes a protrusion (vertical portion) 53 a that covers the solder 55 provided on the flange 52 a of the plunger 52, and a direction that is continuous with the protrusion 53 a and orthogonal to the axis of the head body 10. And a disc portion 53b extending in the direction. A force is applied to the heat sensitive plate 53 so as to compress the solder 55 by a ball holding mechanism 60 described later. A cylindrical reinforcing member 80 is attached to the protrusion (vertical portion) 53 a of the heat sensitive plate 53. Details of the reinforcing member 80 will be described later (see FIG. 3).

  A donut-shaped heat insulating material 54 is provided on the heat sensitive plate 72 so that heat received by the heat sensitive plate 53 does not escape to the balancer 63 side described later. Further, another heat sensitive plate 71, 72 is provided between the heat insulating material 54 and the heat sensitive plate 53.

The ball holding mechanism 60 includes a ball 61, a slider 62, and a balancer 63. Since the balancer 63 has a function of compressing the solder 55, it functions as a piston.
The lower outer periphery of the ball 61 is locked to the locking step 22 of the frame 20. In this state, it is the slider 62 that presses the ball 61 from above, and when a force is applied from the slider 62 to the ball 61, a force acts on the ball 61 in the direction of entering the inside. The balancer 63 is provided inside the ball 61, and regulates the movement of the ball 61 trying to enter the inside of the ball 61. Both the slider 62 and the balancer 63 are formed in a disc shape, and there is a through hole in the center. A set screw 65 passes through the through hole of the balancer 63. The through hole of the balancer 63 is slightly larger than the outer diameter of the set screw 65, and the two are not connected.

  The balancer 63 has a shape in which a cylindrical portion having a through hole and a disk portion provided above the cylindrical portion are combined. A step portion is formed at the lower outer periphery of the balancer 63. The outer peripheral lower step portion is configured to abut on the inner lower portion of the locking step portion 22 of the frame 20. When an external force is applied from below the balancer 63, Absorb the shock at the part. Further, a stepped portion 63a into which the heat insulating material 54 is fitted protrudes from the lower portion of the cylindrical portion of the balancer 63 around the central through hole, and an inclined portion 63b to which the ball 61 hits the upper portion of the disc portion of the balancer 63. Is formed to protrude.

  A concave portion 62a is formed in the lower part on the outer peripheral side of the slider 62, and the surface of the concave portion 62a that contacts the ball 61 is formed in a tapered shape (inclined portion) so as to be inclined inwardly downward.

  The spring force of the disc spring 32 is transmitted to the ball 61 through the valve body 30 and the set screw 65 via the slider 62, and the force is applied so that the ball 61 always moves inward. As a result, the balancer 63 is moved downward. A force acts to move it. Therefore, if the solder 55 melts and flows out, the balancer 63 moves downward, and accordingly, the ball 61 enters inside, and the locked state with the locking step portion 22 of the frame 20 is released. The ball holding mechanism 60 falls together with the heat sensitive part 51. If the ball holding mechanism 60 falls, the valve body 30, the stopper ring 43, etc. which comprise the water sprinkling part 40 will fall in connection with it, and water discharge will be performed.

  The set screw 65 is a bolt composed of a head portion and a leg portion, and the lower portion of the leg portion is coupled to the upper portion of the plunger 52, so that the balancer 63, the slider 62, and the heat sensitive portion 51 as the ball holding mechanism 60 are connected. It is integrated.

  In the sprinkler head 1 as described above, in the state of FIG. 1, the water pressure of the fire extinguishing water at the outlet 12 and the assembly load of the parts act on the ball 61, and the ball 61 tends to move inward (center side). However, the movement of the ball 61 is blocked by the balancer 63, and the ball holding mechanism 60 holds the ball 61. In this state, the valve body 30 and the disc spring 32 seal the water outlet 12 of the head body 10. For this reason, although the fire extinguishing water pressurized is supplied to the sprinkler head 1, the fire extinguishing water does not leak. Further, in the water sprinkling unit 40, the deflector 41 is fixed to the valve body 30, and the guide rod 42 is fixed to the deflector 41. When the valve body 30 seals the water outlet 12, the guide rod 42 is the head. The main body 10 is housed in the space 18.

Next, the operation of the sprinkler head 1 of FIG. 1 will be described.
FIG. 2 is an operation explanatory view of the sprinkler head 1 of FIG.
(A) In the monitoring state of the sprinkler head 1, pressurized fire extinguishing water is supplied to the water outlet 12 of the head body 10, and the pressure of the fire extinguishing water is applied to the valve body 30 (FIG. 1). reference). When a fire occurs and the hot airflow hits the heat sensitive plates 53, 71, 72, the heat is heated, and the heat of the heat sensitive plates 53, 71, 72 propagates to the solder 55. When the solder 55 is heated from the surroundings and starts to melt, the melted solder 55 flows out from the gap formed between the plunger 52 and the heat sensitive plate 53 (projection 53a), and its volume decreases. At this time, the ball 61 pushed from above by the balancer 63 moves inward, but even if the ball 61 moves, the disc spring 32 is pressed against the valve seat 17 and the valve body 30 and disc spring 32 are released. The state where the water inlet 12 is blocked is maintained.

(B) When the solder 55 melts and flows out, the heat sensitive plates 53, 71, and 72 descend according to the amount of the solder 55 flowing out. When the heat sensitive plates 53, 71, 72 are lowered, the heat insulating material 54 and the balancer 63 attached on the heat sensitive plates 53, 71, 72 are lowered. When the balancer 63 is lowered, a gap between the balancer 63 and the slider 62 is widened, and the ball 61 biased inward moves inward beyond the stepped portion 63b of the balancer 63, and the locking stepped portion of the frame 20 is moved. The engagement between the ball 22 and the ball 61 is released. Thereby, the valve body 30 and the valve body support mechanism 50 are lowered.

(C) When the valve body support mechanism 50 including the disc spring 32 disposed under the valve body 30 is dropped, the valve body 30 is lowered. As the valve body 30 is lowered, the deflector 41 attached to the valve body 30, the guide rod 42 attached to the deflector 41, and the stopper ring 43 are lowered. When the guide rod 42 is lowered, the stopper ring 43 is locked to the locking step portion 22 of the frame 20, and the valve body 30 and the deflector 41 are suspended from the frame 20 by the guide rod 42. That is, the state shown in FIG. 2 is obtained.

  In the present embodiment, during the water discharge operation, the deflector 41 descends together with the guide rod 42 while being guided by the guide portion 43a, so that the deflector 41 is smoothly lowered.

(D) As described above, when the valve body 30 is lowered, the water outlet 12 is opened, and the fire extinguishing water pressurized is sprinkled from the deflector 41 to extinguish the fire.

Next, the structure of the characteristic part of this Embodiment is demonstrated.
FIG. 3 is a cross-sectional view of the heat-sensitive part, and FIGS. 4A and 4B are a plan view and a vertical cross-sectional view of the auxiliary member.
The heat-sensitive portion 51 of the sprinkler head includes a plunger 52, solder 55 provided on the flange 52 a of the plunger 52, and heat-sensitive plates 53, 71, 72. The heat sensitive plate 53 functions as the lower layer heat sensitive plate of the present invention, and a cylindrical reinforcing member 80 shown in FIG. 4 is mounted on the outer periphery of the protrusion (vertical portion) 53a. The heat sensitive plates 71 and 72 function as the upper heat sensitive plate of the present invention. The height of the reinforcing member 80 corresponds to, for example, the distance between the heat sensitive plate (lower heat sensitive plate) 53 and the heat sensitive plates (upper heat sensitive plates) 71 and 72. The heat sensitive plates 53, 71, 72 have the same thickness, but the thickness (thickness) of the reinforcing member 80 is set to be greater than the thickness of the heat sensitive plates 53, 71, 72.

  As described above, since the heat sensitive portion 51 includes the reinforcing member 80, even if the solder spreads due to the load applied to the solder 55 and the force acts on the protrusion 53a of the heat sensitive plate 53, the heat sensitive plate. The deformation of 53 in the outer peripheral direction is prevented. As described above, since the deformation of the heat sensitive plate 53 is prevented by the reinforcing member 80, it is possible to reduce the thickness of the heat sensitive plate (lower heat sensitive plate) 53, thereby improving the sensitivity of the sprinkler head 1. . Furthermore, since the height of the reinforcing member 80 is the same as the distance between the heat sensitive plate (lower heat sensitive plate) 53 and the heat sensitive plates (upper heat sensitive plates) 71 and 72, external force is applied to the heat sensitive plate (lower heat sensitive plate) 53 from below. Even if it is applied, the force can be transmitted to the heat sensitive plates (upper heat sensitive plate side) 71 and 72 via the reinforcing member 80, so that deformation of the heat sensitive plate (lower heat sensitive plate) 53 can be suppressed.

  In the present embodiment, by providing the auxiliary member at a position that suppresses deformation of the heat sensitive plate, the thickness of the heat sensitive plate can be optimized in terms of sensitivity, and high sensitivity can be achieved. . In addition, when the hot airflow is favorable, this auxiliary member has a function of absorbing heat by using a material having high thermal conductivity. Otherwise, the auxiliary member is used by using a material having low thermal conductivity. The heat capacity is not increased by insulating the plate.

  By the way, the heat-sensitive part 51 has a shape in which the lower heat-sensitive plate 53 is positioned below the lower end of the plunger 52 and the reinforcing member 80 extends below the lower end of the plunger 52. Thus, by extending the reinforcing member 80 below the lower end of the plunger 52, for example, a protective effect against external force from obliquely below can be obtained, and the thermal plate 53 can be prevented from being caught in the plunger 52. .

  In FIG. 3, in addition to the reinforcing member 80 of the lower thermal plate 53, the thermal unit 51 may arrange another reinforcing member between the upper portion of the upper thermal plate 72 and the balancer 73. By providing the reinforcing members 80 on the heat sensitive plate 53 and the heat sensitive plate 72 as described above, the plunger 52, the solder 55, and the heat insulating material 54 can be protected from external forces in the vertical direction, and their deformation can be prevented. it can. Thereby, the plunger 52 and the heat sensitive plate can be thinned, and the sensitivity is also improved.

  In the present embodiment, the example in which the reinforcing member 80 is provided in the heat-sensitive part 51 having the above-described configuration has been described. However, the heat-sensitive part 51 may have another structure.

Embodiment 2. FIG.
FIG. 5 is a cross-sectional view of the heat sensitive part of the sprinkler head according to Embodiment 2 of the present invention. Although the example in which the reinforcing member 80 is provided has been described in the first embodiment, an example in which the reinforcing member is not used will be described in the second embodiment.
The heat sensitive part 51 of the second embodiment fulfills the function of a reinforcing member by making the thickness of the vertical part of the heat sensitive plate (lower heat sensitive plate) 53 thicker than the thickness of the disc part 53b which is a horizontal part. be able to.

In this embodiment, in order to prevent the deformation of the vertical portion of the heat sensitive plate, the strength of only the vertical portion that is easily deformed due to the stress from the solder is required, rather than adjusting the overall thickness of the heat sensitive plate. As an important part, the plate thickness is adjusted so as not to be deformed by stress. Since the horizontal portion other than the vertical portion is formed so that the plate thickness is reduced so as to increase the heat receiving efficiency, the problem of the heat capacity caused by increasing the plate thickness of the entire heat sensitive plate is minimized. Therefore, the sensitivity of the sprinkler head can be increased.
In addition, the thickness of the horizontal part of the heat sensitive plate may not be made uniform, but may be formed so that the thickness becomes thinner toward the outer periphery, and in this way, the heat capacity can be further suppressed. is there. Further, such a heat sensitive plate can be processed with a low pressing pressure by press-molding a cylindrical material.

  DESCRIPTION OF SYMBOLS 1 Sprinkler head, 10 Head main body, 11 Opening part, 12 Water discharge port, 13 Flange, 14, 15 Screw part, 16 Water discharge pipe, 17 Valve seat, 18 Space, 20 Frame, 21 Screw part, 22 Locking step part, 30 Valve body, 31 flange part, 32 disc spring, 40 water spray part, 41 deflector, 41a insertion hole, 42 guide rod, 42a step part, 43 stopper ring, 43a guide part, 50 valve body support mechanism, 51 heat sensitive part, 52 plunger , 52a flange, 52b female screw, 53 heat sensitive plate, 54 heat insulating material, 55 solder, 60 ball holding mechanism, 61 ball, 62 slider, 62a concave portion, 63 balancer, 64 disc spring, 65 set screw, 71, 72 heat sensitive plate, 80 Reinforcing member.

Claims (4)

A plunger with a flange formed at the lower end;
Solder provided on the flange of the plunger;
In the sprinkler head having a heat-sensitive part that is attached to the upper part of the solder and includes a lower-layer heat-sensitive plate constituting a cylinder,
Provided on the outer periphery of the vertical portion of the lower layer thermal plate, comprising a cylindrical reinforcing member that suppresses the spread of the vertical portion of the thermal plate in the radial direction ,
The heat sensitive part includes an upper heat sensitive plate provided above the heat sensitive plate,
The sprinkler head according to claim 1, wherein a thickness of the lower layer thermal plate is substantially the same as a thickness of the upper thermal plate . A plunger with a flange formed at the lower end;
Solder provided on the flange of the plunger;
In the sprinkler head having a heat-sensitive part that is attached to the upper part of the solder and includes a lower-layer heat-sensitive plate constituting a cylinder,
Provided on the outer periphery of the vertical portion of the lower layer thermal plate, comprising a cylindrical reinforcing member that suppresses the spread of the vertical portion of the thermal plate in the radial direction ,
The heat sensitive part includes an upper heat sensitive plate provided above the heat sensitive plate,
The sprinkler head according to claim 1, wherein a height of the reinforcing member is the same as a distance between the lower layer thermal plate and the upper layer thermal plate . A plunger with a flange formed at the lower end;
Solder provided on the flange of the plunger;
In the sprinkler head having a heat-sensitive part that is attached to the upper part of the solder and includes a lower-layer heat-sensitive plate constituting a cylinder,
Provided on the outer periphery of the vertical portion of the lower layer thermal plate, comprising a cylindrical reinforcing member that suppresses the spread of the vertical portion of the thermal plate in the radial direction ,
The sprinkler head , wherein the thickness of the reinforcing member is greater than the thickness of the lower layer heat sensitive plate . The lower layer thermal plate has a lower end located below the lower end of the plunger,
The reinforcing member has a shape extending downward from the lower end of the plunger.
The sprinkler head according to any one of claims 1 to 3, wherein the sprinkler head is provided.

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