JPH1199221A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make watering distribution of water for fire extinguishing approximately uniform over the whole periphery by designing a shape of the top peripheral edge part of a plug body. SOLUTION: In a sprinkler head wherein the plug body 7 is arranged by facing to the outlet 2 of a main body 1 at a specified interval when water is sprayed and water for fire extinguishing colliding with the top part of the plug body 7 is made to collide with the underside of the head main body 1 and is sprayed from a space A for water spraying formed between the head main body 1 and the plug body 7, it is formed in such a way that to dispersing the water for fire extinguishing colliding with the top face of the plug body 7 and is made to collide with the underside of the head main body 1, a standing face 12 standing approximately vertically, a horizontal face 13 extending approximately horizontally and outerward on the standing face 12 and an inclined face 15 extending outerward to the horizontal face 13 are respectively annularly formed on the peripheral part of the top face of the plug body 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler head capable of satisfactorily spraying fire extinguishing water over the entire circumference.

[0002]

2. Description of the Related Art Conventionally, fire extinguishing water that has collided with the upper surface of a plug body at the time of sprinkling further impinges on the lower surface of a head body, and sprinkler head S 'that sprinkles water from a sprinkling space formed between the head body and the plug body. For example, there is one as shown in FIG.

[0003] Fig. 1 shows a state of water sprinkling.
The upper surface is formed on a horizontal surface 47 with an inclined surface 48 inclined upward toward the outer peripheral side.

[0004]

The applicant of the present invention conducted a watering test by actually using the above-mentioned conventional sprinkler head S ', and obtained a test result as shown in FIG.

[0005] In the figure, a two-dot chain line is a specified value required for this type of sprinkler head, and a solid line indicates an actually measured value.
According to this, although the measured value does not fall below the specified value, the horizontal distance from the center of the sprinkler head is 2 m.
It can be seen that the watering rate dropped extremely near the point where, and the watering rate increased again after this.

The applicant of the present invention has taken various measures to clarify the cause of such a variation in the amount of water sprayed, and as a result, the distribution of water spray has been reduced due to the shape of the upper surface peripheral portion of the plug 7a. They came to the conclusion that they were biased.

In short, in the conventional sprinkler head S ', most of the fire-extinguishing water colliding with the upper surface of the plug 7a flows obliquely upward along the inclined surface 48, that is, the inclined surface of the plug 7a. As a result, the main flow of the fire-extinguishing water is formed by 48, and another flow of the fire-extinguishing water is attracted to the main flow, so that the portion of the lower surface of the head main body 1a where the fire-extinguishing water collides is concentrated on a narrow annular portion. Thus, an area where the amount of water spray is reduced as described above is formed.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems. By devising the shape of the peripheral portion of the upper surface of the plug, the distribution of fire-extinguishing water can be substantially reduced over the entire circumference. It is an object to make it uniform.

[0009]

That is, the means adopted by the present invention to solve the above-mentioned problems is that the head body 1 is used at the time of watering.
The plug body 7 is disposed opposite to the outlet 2 at a predetermined interval, and the fire extinguishing water that collides with the upper surface of the plug body 7 further collides with the lower surface of the head body 1 so that the head body 1 and the plug In the sprinkler head sprinkled from the water sprinkling space A formed between the bodies 7, the fire extinguishing water that has collided with the upper surface of the plug 7 is dispersed so as to collide with the lower surface of the head body 1. On the peripheral edge portion, a rising surface 12 formed to be raised substantially vertically, a horizontal surface 13 extending substantially horizontally outward on the rising surface 12, and an upwardly extending outer circumferential side extending on the horizontal surface 13. The point is that the inclined surface 15 and the inclined surface 15 are each formed in an annular shape.

Therefore, in the sprinkler head having the above-mentioned particulars, the fire extinguishing water discharged from the outlet 2 of the head body 1 collides with the upper surface of the plug 7, but the upper surface of the plug 7 Rising surface 12 and horizontal surface 13 at the periphery
A part of the fire extinguishing water collides with the rising surface 12 and the horizontal plane 13 and flows to the lower surface of the head body 1, and a part of the fire extinguishing water is Collides with the lower surface of the head main body 1 via.

In other words, by forming a plurality of collision surfaces having different angles on the periphery of the upper surface of the plug 7, the fire extinguishing water that has collided with the collision surfaces is dispersed without bias. As a result of the fire extinguishing water colliding over a wide range, the distribution of the fire extinguishing water sprinkled from the water sprinkling space A becomes substantially uniform over the entire circumference.

In other words, the main flow of the fire-extinguishing water from the upper surface of the plug 7 to the lower surface of the head body 1 is not formed, but is disturbed and collides with the lower surface of the head body 1.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a sprinkler head according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a cylindrical portion 3 having a fire extinguishing water outlet 2, and a large-diameter portion 4 formed at the lower end of the cylindrical portion 3.
The screw body 5 is formed on the outer peripheral surface of the cylindrical portion 3 and the inner peripheral surface of the enlarged diameter portion 4 respectively.

Reference numeral 7 denotes a plug for closing the outlet 2 of the head main body 1. The plug has a hexagonal hole 8 in the center of the upper surface and a circular groove 9 formed in the outer peripheral surface on the base end side. 10 is protruded, the upper peripheral edge is a stepped portion 14 consisting of a rising surface 12 formed substantially vertically rising to the horizontal portion 11 and a horizontal surface 13 extending outwardly and substantially horizontally to the rising surface 12, An inclined surface 15 extending on the horizontal surface 13 and inclined upward by 45 ° toward the outer peripheral side, and a flat portion 15 extending substantially horizontally from the inclined surface 15 are provided. An outer cylindrical portion 16 and a small-diameter inner cylindrical portion 17 are respectively formed, and a screw hole 18 is formed in an inner peripheral surface of the inner cylindrical portion 17.

Reference numeral 19 denotes a coned disc spring whose inner peripheral edge is fitted in the concave groove 9 of the plug body 7, the outer peripheral edge of which is engaged with the lower end surface of the cylindrical portion 3 of the head main body 1, and the surface of which is made of fluororesin. Coated.

Reference numeral 20 denotes an annular concave portion 21 formed on the lower surface located outside the cylindrical portion 3 of the head body 1 and a horizontal surface 13 of the plug 7.
3 shows a coil spring mounted in a biased state therebetween. 22 is the plug 7
A hexagonal hole 23 is formed at the center of the bottom of the screw body.

Reference numeral 24 denotes a frame formed on the lower surface with a circular hole 26 having a concave portion 25 at the upper part of the inner peripheral surface, the upper end of which is screwed into the screw portion 6 of the head body 1 and formed from the upper end to the lower surface. A plurality of substantially trapezoidal watering holes 28 are formed at predetermined intervals in the inclined portion 27 disposed in the watering space A as shown in FIG. There is a watering plate 29
Are formed substantially vertically.

Reference numeral 30 denotes a resiliently deformable locking member which is formed in a partially notched ring shape and whose diameter is enlarged or reduced. 31 and 32 are a pair of holding bodies for holding and holding the locking body 30, and a concave portion 33 in which the lower end of the screw body 22 can be fitted is formed on the upper surface of the upper holding body 31. The cylindrical portion 34 protruding from the lower surface thereof is provided with a screw hole 35 communicating with the concave portion 33, and the cylindrical portion 34 of the lower holding body 32 is formed in the cylindrical portion of the upper holding body 31. 36 is slidably fitted. Numerals 37 and 38 denote tapered surfaces formed on the periphery of each of the holding members 31 and 32, and the interval between them becomes smaller toward the inside so that the locking member 30 can be held in an expanded state therebetween. It is configured.

Reference numeral 39 denotes a screw body which is screwed into the screw hole 35 of the upper holding body 31, and a through hole 40 is formed in the center thereof in the vertical direction. 41, 42, 43 are flanges formed at the lower end of the screw body 39
Shown are a heat insulating packing, a heat sensitive body, and a soluble fusible body interposed between 44 and the lower end of the lower holding body 32, respectively. Reference numeral 45 denotes a head cover detachably attached to close the water sprinkling hole 28 of the frame 24, and a lower end portion thereof has a flange portion 32 of a lower holding body 32.
Are held by holding pieces 46 projecting outward.

The sprinkler head S according to this embodiment
The sprinkler head S is used, for example, by screwing the screw portion 5 of the head body 1 to a pipe.

If a fire occurs, the heat sensitive plate 42
Then, the fusible body 43 interposed between the heat-sensitive plate 42 and the flange 44 of the screw body 39 melts or softens.

As a result, as shown in FIG.
Is lowered and the locking body 30 contracts, and the locking state between the concave portion 25 of the frame 24 and the tapered surfaces 37 and 38 of the holding bodies 31 and 32 is released. As a result, the water pressure of the fire extinguishing water and the disc spring 19 By the elastic force of the coil spring 20, the holding members 31, 32, the screw body 39, the plug 7, and the like supported by the holding bodies 31, 32 fall below the head main body 1. It is held and is opposed to the open outlet 4 of the head body 1 at a predetermined interval.

The fire extinguishing water discharged from the outlet 4 collides with the upper surface of the plug 7, collides with the lower surface of the enlarged diameter portion 4 of the head body 1, and is sprayed from the water holes 28 of the frame 24. Will be.

The flow of the fire extinguishing water in this case is shown by a two-dot chain line in FIG. 4, and an inclined surface 15 is formed on the peripheral edge of the upper surface of the plug 7 via a rising surface 12 and a horizontal surface 13. Therefore, part of the fire extinguishing water collides with the rising surface 12 and the horizontal surface 13 and flows to the lower surface of the head main body 1, and part of the fire extinguishing water collides with the lower surface of the head main body 1 via the inclined surface 15. Will be.

As described above, by forming a plurality of collision surfaces having different angles on the periphery of the upper surface of the plug 7, the fire extinguishing water that has collided with the collision surfaces is dispersed without being biased.
That is, since the main flow of fire-extinguishing water from the upper surface of the plug 7 to the lower surface of the head main body 1 is not formed, and turbulence occurs, the fire-extinguishing water collides over a wide range of the lower surface of the head main body 1,
The distribution of fire-extinguishing water sprinkled from the sprinkling space A is substantially uniform over the entire circumference without bias.

FIG. 5 shows the results obtained by the watering test. The solid line in the figure is the measured value, and the specified value is the two-dot chain line. According to this, regardless of the magnitude of the horizontal distance from the center of the sprinkler head S, the measured value greatly exceeds the specified value, and it can be seen that there is no area where the amount of water sprinkled extremely decreases, and water is sprinkled almost uniformly. .

In the above-described embodiment, the frame 24 in which the water sprinkling plate 29 is formed upright at the lower edge of the water sprinkling hole 28 is provided in the water sprinkling space A. Need not be disposed in the sprinkling space A.

In the above embodiment, the inclined surface 15 of the plug 7 is
Although the plane 16 is extended, the plane 16 may be omitted, the inclined surface 15 may be extended as it is, and the inclination angle can be arbitrarily changed within the range intended by the present invention. is there.

In addition, it is needless to say that specific specifics of each part of the sprinkler head S are not limited to the above embodiment, but can be applied to the sprinkler head S having a different mechanism.

[0031]

As described above, according to the present invention, since the rising surface, the horizontal surface and the inclined surface having different angles are formed on the peripheral portion of the upper surface of the plug body, the fire extinguishing water colliding with each of these constituent surfaces is biased. Without dispersal.

That is, unlike the conventional sprinkler head, since the main flow of the fire extinguishing water from the upper surface of the plug to the lower surface of the head body is not formed, and the turbulence occurs, the fire extinguishing water spreads over a wide range of the lower surface of the head body. As a result of the collision, the distribution of the water for fire-fighting water sprayed from the watering space becomes substantially uniform over the entire circumference.

Further, according to the second aspect of the present invention, by disposing a frame in which a sprinkler plate is formed upright at the lower edge portion of the sprinkler hole in the sprinkler space, the sprinkler plate generates the turbulence of the fire extinguishing water. Therefore, it is possible to form an even better water distribution.

Further, since the sprinkler head according to the present invention has a very simple overall structure, it has a practical effect that it can be manufactured easily and at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a sprinkler head according to the present invention.

FIG. 2 is a bottom view of the frame.

FIG. 3 is a sectional view showing the same use state.

FIG. 4 is an essential part cross-sectional view showing a flow state of the fire extinguishing water.

FIG. 5 is a graph showing the relationship between the horizontal distance from the center of the sprinkler head and the amount of water spray.

FIG. 6 is a cross-sectional view of a sprinkler head showing a conventional example.

FIG. 7 is a graph showing the relationship between the horizontal distance from the center of the sprinkler head and the amount of water spray.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Head body 2 ... Outlet 7 ... Plug body 12 ... Standing surface 13 ... Horizontal surface 15 ... Inclined surface 24 ... Frame 28 ... Sprinkling hole 29 ... Sprinkling plate A ... Sprinkling space

Claims (2)

[Claims] 1. A spout (7) is disposed opposite to an outlet (2) of a head body (1) at a predetermined interval when water is sprinkled.
(7) The fire extinguishing water colliding with the upper surface of
The head body (1) and the plug body are made to collide against the lower surface of (1).
(7) In the sprinkler head sprinkled from the sprinkling space (A) formed between the sprinkler heads, the fire extinguishing water that collides with the upper surface of the plug (7) is dispersed to collide with the lower surface of the head body (1). A rising surface (12) formed substantially vertically at the periphery of the upper surface of the plug (7), and a horizontal surface (13) extending substantially horizontally outward on the rising surface (12). And a slanted surface (15) extending on the horizontal plane (13) and inclined upwardly toward the outer peripheral side, each being formed in an annular shape. 2. A sprinkler (7) in the watering space (A) when watering.
Frame (24) attached to the head body (1) to hold
The frame (24) is provided with a plurality of watering holes (28), and the lower edge portion of the watering holes (28) is provided with watering plates (2).
The sprinkler head according to claim 1, wherein 9) is formed upright.