JP2009291359A - Sprinkler head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sprinkler head including a nozzle formed inside a body, connection means on an inlet side of the nozzle to be connected to fire-extinguishing apparatus wiring continued from a water supply source, a flange part formed in the vicinity of the connection means, and a cylindrical frame threadedly engaged with the flange part, which is capable of reducing the cost by reducing the weight of the body. <P>SOLUTION: The surface roughness of the nozzle 11 on an outlet side 13 is smaller than that on the inlet side 12. For example, the surface of the nozzle on the inlet side 12 is in the forged or casted state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a sprinkler head connected to the end of fire extinguishing equipment piping.

The sprinkler head has a main body having a nozzle connected to a water-filled fire-extinguishing equipment pipe. When a fire occurs, the heat of the fire is detected and water is automatically sprayed to extinguish the fire. The part of the sprinkler head that decomposes due to the heat of the fire and opens the valve body of the sprinkler head is called a heat-sensitive decomposition part. ).

The thermal decomposition part supports the valve body in the closed position, and when the low melting point alloy melts due to the heat of the fire, the thermal decomposition part is decomposed and the support of the valve body is released to open the valve body . By opening the valve body, water filled in the fire extinguishing equipment pipe is discharged from the nozzle of the main body to the outside.

In general, since the sprinkler head main body and the fire extinguishing equipment pipe are connected by screws, the main body of the sprinkler head is provided with a locking portion for locking a fastening tool such as a wrench or a spanner. As an example, the main body 50 of the sprinkler head shown in FIG. 6 is provided with a plurality of vertical grooves 53 at equal intervals on the side surface of a flange portion 52 formed by extending from the root of the male screw 51 connected to the pipe P. The male screw 51 of the sprinkler head main body 50 can be screwed into a female screw (not shown) of the pipe by a cylindrical wrench head 55 having a projection 54 that engages with the vertical groove 53.

Further, as shown in FIG. 5, the nozzle 57 formed in the main body 50 of the sprinkler head is loose from the end of the connection side of the fire extinguishing equipment pipe P on the inlet side toward the outlet side closed by the valve 58. It is cut into a tapered shape. Accordingly, since the inner diameter on the nozzle outlet side is smaller than the inner diameter on the nozzle inlet side, there is a portion that is thick from the vicinity of the nozzle outlet to the root portion of the male screw 51 of the flange portion 52.

JP-A-7-284545

The cost of sprinkler head components has increased due to the recent rise in metal materials. Therefore, it is an object of the present invention to provide a sprinkler head that reduces the cost of the sprinkler head by reducing the weight of the main body. Yes.

In order to achieve the above object, the invention according to claim 1 is a main body of a sprinkler head, wherein a nozzle is formed therein, and is connected to a fire extinguishing equipment pipe continuing from a water supply source on the inlet side of the nozzle. In the sprinkler head having a flange portion formed in the vicinity of the connecting means and provided with a frame on the flange portion, the surface roughness on the outlet side of the nozzle is higher than the surface roughness on the inlet side. It is a sprinkler head characterized by being small.

The object of surface roughness in the present invention includes not only the surface roughness of the processed surface obtained by cutting or polishing, but the surface state at the time of forming a material formed by forging or casting (Forging surface or casting surface), and also includes a surface subjected to blasting, plating, painting, coating, or the like.

According to a second aspect of the present invention, in the sprinkler head, the surface roughness on the inlet side of the nozzle is in a state during forging or casting, the sprinkler head according to the first aspect.

According to a third aspect of the present invention, in the sprinkler head, a step is formed at the boundary between the outlet side and the inlet side of the nozzle.

According to a fourth aspect of the present invention, in the sprinkler head, any one of blasting, plating, painting, and coating is applied to either the inlet side or the outlet side of the nozzle. The sprinkler head according to Item 1.

According to the invention of claim 5, the main body of the sprinkler head, a nozzle is formed inside, and has a connecting means connected to the fire extinguishing equipment piping continuing from the water supply source on the inlet side of the nozzle, In the sprinkler head in which a flange portion is formed in the vicinity of the connection means and the frame is provided on the flange portion, the number of body engaging portions that engage with a fastening tool provided on the peripheral surface of the flange portion is fastened. The sprinkler head is provided more than the engagement portion on the tool side.

According to the sixth aspect of the present invention, in the sprinkler head, an accessory of the sprinkler head is locked to a main body engaging portion that engages with a fastening tool provided on a peripheral surface of the flange portion of the main body. The sprinkler head according to claim 5, wherein the head is a sprinkler head.

According to the invention of claim 7, the main body of the sprinkler head, a nozzle is formed inside, and has a connecting means connected to the fire extinguishing equipment piping continuing from the water supply source on the inlet side of the nozzle, In the sprinkler head in which a flange portion is formed in the vicinity of the connecting means and a frame is provided on the flange portion, a groove recessed on the nozzle inlet side is engraved on the flange surface on the nozzle outlet side in the vicinity of the nozzle outlet. It is the sprinkler head characterized by being.

According to the first aspect of the present invention, the surface roughness on the nozzle outlet side of the sprinkler head is made smaller than the surface roughness on the inlet side, so that, for example, cutting is performed after the main body is formed by forging or casting. In this case, the nozzle inlet side should be formed at the time of forging or casting, and the outlet side that has a large effect on the water discharge amount of the nozzle should be cut to finish the surface smoothly and reduce the surface roughness. Can do.

According to the second aspect of the present invention, since the surface roughness of the inlet side of the nozzle is set to a state during forging or casting, it is possible to use the hole formed at the time of forging or casting the nozzle inlet side as it is. It becomes.

According to the third aspect of the present invention, a step is formed at the boundary between the outlet side and the inlet side of the nozzle. For example, when the inlet side of the nozzle is a hole formed during casting, Since it is difficult to machine with the same diameter as the hole diameter on the inlet side when performing nozzle machining, making the nozzle on the outlet side easier by making the nozzle diameter on the outlet side smaller than the nozzle diameter on the inlet side Can do.

According to the fourth aspect of the present invention, even when the surface roughness on the outlet side and the inlet side is the same at the time of machining in the nozzle, the blasting, coating, plating, or the like is performed on the nozzle outlet side or the inlet side. The surface roughness on the outlet side can be made smaller than the surface roughness on the inlet side by carrying out on either side.

According to the invention described in claim 5, by providing a larger number of main body engaging portions that engage with the fastening tool provided on the peripheral surface of the main body flange portion of the sprinkler head than the engaging portion on the fastening tool side, For example, if the main body engaging portion is a vertical groove carved on the peripheral surface of the flange portion, the main body can be reduced in weight by providing more vertical grooves than the engaging portion on the fastening tool side.

According to the sixth aspect of the present invention, the number of the main body engaging portions that engage with the fastening tool provided on the peripheral surface of the main body flange portion of the sprinkler head is provided more than the engaging portion on the fastening tool side. Sprinkler head accessories such as protective caps and sealing plates can be locked to the engaging part, and the sprinkler head accessory and sprinkler head are prevented from spinning idle when the sprinkler head accessory is attached to the sprinkler head. it can.

According to the invention described in claim 7, the outer peripheral surface in the vicinity of the nozzle outlet is thinned and lightened by engraving a groove recessed in the nozzle inlet side in the vicinity of the nozzle outlet on the flange surface on the nozzle outlet side of the main body of the sprinkler head. Is planned.

In the present invention, the main body is formed by forging or casting by providing a cylindrical portion of the screw portion and a flange having a diameter larger than the outer diameter of the cylindrical portion on one end side of the cylindrical portion. At that time, it is preferable that a hole to be a nozzle inlet is formed in advance in the cylindrical portion at the stage of forging or casting. By forming the outlet side of the nozzle by excavation or cutting, the surface roughness on the nozzle outlet side can be made smaller than the surface roughness on the inlet side.

Alternatively, when forming the main body from bar material, when cutting on the nozzle inlet side, the cutting tool feed speed is increased to rough machining, and the outlet side that greatly affects the nozzle water discharge rate is the cutting tool feed speed. The surface roughness on the nozzle outlet side can be reduced by reducing the surface roughness and cutting with the same surface roughness from the inlet side to the outlet side of the nozzle, and coating or painting only on the nozzle outlet side after processing. The degree can be made smaller than the surface roughness on the inlet side.

If the number of the main body engaging portions that engage with the fastening tool provided on the peripheral surface of the main body flange portion of the sprinkler head is larger than the engaging portion on the fastening tool side, the wrench head described in the background art section may be used. A cap that protects the sprinkler head from an external force may be fixed to the main body engaging portion that does not engage with the engaging portion on the fastening tool side.

In addition to the protective cap, as a sprinkler head accessory, from a sealing plate that covers the gap in the ceiling hole where the sprinkler head is installed, a guard that protects the sprinkler head installed on the wall surface or ceiling surface from external force, and a nearby sprinkler head There is a moisture prevention device for preventing the sprayed water from being exposed. When the accessory of the sprinkler head is locked to the main body engaging portion, it is possible to stop the diameter of all of the main body engaging portions or only a part thereof.

Embodiment 1 of the present invention will be described below with reference to FIGS. 1 is a cross-sectional view of a sprinkler head according to the present invention, FIG. 2 is a cross-sectional view of a main body, FIG. 3 is a bottom view of the main body, and FIG. 4 is a perspective view showing an engaged state of the sprinkler head, a protective cap, and a wrench.

As shown in FIG. 1, the sprinkler head of the present invention includes a main body 1, a frame 2, a deflector assembly 3, a thermal decomposition unit 4, and a heat collection unit 5. Since the configuration of the sprinkler head is substantially the same as that of the sprinkler head described in Japanese Patent Application Laid-Open No. 7-284545, detailed description thereof will be omitted mainly with respect to differences.

The main body 1 shown in FIGS. 1 and 2 is formed by forging or casting and then formed into the shape shown by cutting. The main body 1 has a cylindrical shape, and a male screw 7 connected to the fire extinguishing equipment pipe 6 is engraved on the outer periphery, and a flange 8 that extends outward from the root of the male screw 7 is formed. A plurality of lateral grooves 9 are engraved in a layered manner on the side surface portion 8A formed by hanging downward from the peripheral surface of the flange 8 in the drawing, and further, longitudinal grooves 10 are engraved at equal angular intervals as shown in FIG. ing. A female screw that is screwed into the frame 2 is formed on the inner periphery of the side surface portion 8A.

The inside of the main body 1 is a nozzle 11, and the nozzle inlet 12 on the fire extinguishing equipment pipe 6 side is used as it is without a hole formed during forging or casting. The nozzle outlet portion 13 closed by the valve V of the nozzle 11 is formed by cutting, and the surface roughness of the cutting surface is smaller than the surface roughness of the nozzle inlet portion 12.

In the nozzle outlet portion 13, the inner diameter in the vicinity of the nozzle inlet portion 12 is slightly smaller than the inner diameter of the nozzle inlet portion 12, and the tapered portion 13 </ b> A is formed so as to become smaller toward the end of the nozzle outlet portion 13. Yes. A straight portion 13 </ b> B is provided near the end of the nozzle outlet portion 13. The boundary between the tapered portion 13A and the straight portion 13B is R-processed so that no corners are generated, thereby preventing turbulent flow from occurring in the water flowing in the nozzle 11.

A step portion 14 is formed at the boundary between the nozzle inlet portion 12 and the nozzle outlet portion 13.

The terminal end of the nozzle outlet portion 13 protrudes downward from the flange 8 described above. The end surface of the nozzle outlet portion 13 is a seat surface, and is in contact with the valve 12 via an annular seal member 15 made of resin. The valve V is supported by the thermal decomposition unit 4 via a saddle 16 provided on the opposite side of the nozzle 11, and always presses the end of the nozzle outlet unit 13 to close the nozzle 11.

A groove 8B that is recessed toward the nozzle inlet portion 12 may be formed in the flange 8 near the end of the nozzle outlet portion 13. The groove 8B can be formed in an annular shape, but when formed in a plurality of arcs as shown in FIG. 3, the spring S shown in FIG. 1 can be configured not to sink into the groove 8B.

The frame 2 has a cylindrical shape, and the levers 18 and 18 of the thermal decomposition unit 4 are locked to a stepped portion 17 formed at the lower part of the inner periphery. On the outer periphery of the frame 2, a male screw 19 that is screwed with the main body 1 is engraved. When the male screw 19 is screwed into a female screw engraved on the inner periphery of the flange side surface portion 8A of the main body 1, the thermal decomposition portion 4 presses the lower portion of the valve V via the saddle 16. Yes.

A description of the deflector assembly 3, the thermal decomposition unit 4, and the heat collection unit 5 is omitted.

Next, a procedure for attaching the sprinkler head of the present invention to the fire extinguishing equipment piping will be described with reference to FIG.

The sprinkler head of the present invention is attached to the fire extinguishing equipment pipe 6 in a state where the bottomed cylindrical protective cap 20 is attached and the frame 2 and the thermal decomposition part 4 are inserted into the protective cap 20. A plurality of tongue-like bodies 21 provided at equal intervals are formed on the upper end portion of the protective cap 20, and longitudinal projections 22 that engage with the longitudinal grooves 10 </ b> A of the main body 1 are formed on the inner surface of the tongue-like body 21. The lateral projections 23, 23 that are engaged with the lateral grooves 9 of the main body 1 are formed on both side surfaces of the longitudinal projection 22.

The vertical protrusion 22 is engaged with the vertical groove of the main body 10, so that the protective cap is rotated and the male screw 7 of the main body 1 is turned to the connection port 6 </ b> A of the fire extinguishing equipment pipe 6 with the protective cap 20 attached to the sprinkler head. When screwing, the main body 1 is prevented from idling in the protective cap 20. When the sprinkler head is attached to the fire extinguishing equipment pipe 6 by using a wrench head 25 having a cylindrical shape and formed with a vertical protrusion 24 engaged with the vertical groove 10 of the main body 1 on the upper inner surface, the vertical protrusion of the protective cap 20 is used. The vertical protrusions 24 in the wrench head 25 are engaged with the vertical grooves 10B other than the vertical groove 10A with which 22 is engaged, and the main body 1 is prevented from spinning around in the wrench head 25.

In the sprinkler head of the present invention, in the above-described embodiment, the sprinkler head having a structure in which the main body is screwed with the cylindrical frame has been described, but the joining of the main body and the frame is not limited to this, welding, It can also be applied to caulking and adhesives. Furthermore, the member screwed to the main body may be a deflector having a watering hole or a groove instead of the frame. In addition, the main body and the frame can be integrally formed, and the present invention can be applied to a frame yoke type sprinkler head having a horseshoe shape.

In addition to the protective cap and wrench head described above, the vertical groove installed in the main body flange is a sealing plate that covers the gap in the ceiling hole where the sprinkler head is provided, and the sprinkler head installed on the wall or ceiling surface. It is also possible to provide a vertical protrusion that engages with the vertical groove of the main body in a guard that protects the water from external force, a wet prevention device that prevents water sprayed from the adjacent sprinkler head, and the like.

Sectional view of the sprinkler head of the present invention Cross section of the body Bottom view of the main unit The perspective view showing the engagement state of a sprinkler head, a protective cap, and a wrench Cross section of conventional sprinkler head Perspective view when installing a conventional sprinkler head on a fire extinguishing equipment pipe

Explanation of symbols

1 Body
2 frames
4 Thermal decomposition part
6 Fire fighting equipment piping
8 Flange
9 Horizontal groove on the side of the body flange
10 Vertical groove on the side of the body flange
11 nozzles
12 Nozzle inlet
13 Nozzle outlet
14 steps
20 Protective cap
22 Vertical projection of protective cap
24 Vertical projection of wrench head
25 Wrench head

Claims (7)

The main body of the sprinkler head, a nozzle is formed inside, and has a connecting means connected to the fire extinguishing equipment piping continuing from the water supply source on the inlet side of the nozzle, and a flange portion is formed in the vicinity of the connecting means A sprinkler head having a flange provided with a frame, wherein the surface roughness on the outlet side of the nozzle is smaller than the surface roughness on the inlet side.
2. The sprinkler head according to claim 1, wherein the surface roughness of the inlet side of the nozzle is in a state during forging or casting.
  2. The sprinkler head according to claim 1, wherein a step is formed at a boundary between the outlet side and the inlet side of the nozzle in the sprinkler head. 2. The sprinkler head according to claim 1, wherein in the sprinkler head, any one of blasting, plating, painting, and coating is applied to either the inlet side or the outlet side of the nozzle.
The main body of the sprinkler head, a nozzle is formed inside, and has a connecting means connected to the fire extinguishing equipment piping continuing from the water supply source on the inlet side of the nozzle, and a flange portion is formed in the vicinity of the connecting means In the sprinkler head in which the flange is provided with a frame, the number of the main body engaging portions that engage with the fastening tool provided on the peripheral surface of the flange portion is provided more than the engaging portion on the fastening tool side. Sprinkler head characterized by that.
6. The sprinkler head according to claim 5, wherein in the sprinkler head, an accessory of the sprinkler head is locked to a main body engaging portion that engages with a fastening tool provided on a peripheral surface of the flange portion of the main body. .
The main body of the sprinkler head, a nozzle is formed inside, and has a connecting means connected to the fire extinguishing equipment piping continuing from the water supply source on the inlet side of the nozzle, and a flange portion is formed in the vicinity of the connecting means A sprinkler head, wherein the flange portion is provided with a frame, and a groove recessed on the nozzle inlet side is formed in the vicinity of the nozzle outlet on the flange surface on the nozzle outlet side.

Images