JP2006280422A - Sprinkler head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sprinkler head which is not easily affected by external force and is excellent in appearance. <P>SOLUTION: The sprinkler head comprises: a head main body 3 having a water discharge port 2; a cone 5 for closing the water discharge port 2; a glass valve 6 for pressurizing the cone 5 and attaining a closed valve state; a blind cylindrical frame 10 fixed to the flange 7 of the head main body 3 and covering the glass valve 6, where a plurality of oblong holes 20 are formed at intervals in a peripheral direction; a fixing screw 12 provided on the peak plate part 10c of the frame 10 for pressurizing the glass valve 6 in a valve closing direction; and a falling guide means 14 for the cone 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sprinkler head provided in a fire extinguishing facility, and more particularly to a closed sprinkler head in which a heat sensitive part is formed by a glass bulb.

Conventionally, a multi-type and a frame type are known as sprinkler head types (see, for example, Patent Document 1).
The multi-type sprinkler head includes a head body having a water discharge port, a valve body that closes the water discharge port, a bowl-shaped deflector that is fixed to a flange at the lower part of the head body and has a plurality of slits, a low melting point alloy, a pair A heat-sensitive decomposition part composed of a lever, a cylinder, a plunger, and the like, and a heat collecting part continuous to the heat-sensitive decomposition part. In this sprinkler head, the low melting alloy is melted by the heat of the fire, so that the thermal decomposition portion is decomposed and the water outlet is opened.

  The frame type sprinkler head has a head body having a water outlet at the top and a horseshoe-shaped frame at the bottom, a valve body for closing the water outlet, and a clamping screw provided at the center of the bottom of the frame. And a glass valve that is pressed by the tightening screw to urge the valve body in the valve closing direction, and a deflector fixed to the bottom of the frame.

JP-A-11-206907

Since the conventional multi-type sprinkler head has link mechanism parts, the number of parts is large. For this reason, the structure is more complicated and the cost is higher than the frame type sprinkler head, and the thin plate-shaped heat collecting part and link mechanism parts are exposed to the outside of the deflector. There is a problem that it is easy to receive.
On the other hand, the frame type sprinkler head has a lower number of parts than the multi-type sprinkler head, so the cost is low. However, in this type, since the glass bulb is exposed, it is easily affected by external force, and also looks bad and has a problem of aesthetics.

  In view of the above circumstances, an object of the present invention is to provide a sprinkler head that is not easily affected by external force and has a good appearance.

The present invention includes a head body having a water outlet, a cone for closing the water outlet,
A glass valve that presses the cone to close the valve and a bottomed cylindrical frame that is fixed to the flange of the head body and covers the glass valve, and has a plurality of sprinkling openings spaced in the circumferential direction The frame is formed, a fastening fixing member that is provided on a top plate portion of the frame and presses the glass bulb in a valve closing direction, and a drop guide means for the cone. .

  The water spray port according to the present invention is characterized by comprising a long hole formed over the cylindrical portion and the inverted truncated cone portion of the frame, and an escape port formed in the inverted truncated cone portion of the frame. The glass bulb according to the present invention is arranged at a position corresponding to the water spout.

  The cone drop guide means of the present invention is a guide rod that penetrates the cone and the tip of which is press-fitted and held in the head main body or fixed to the cone. It is characterized in that a stopper for restricting dropping is provided. The position of the stopper according to the present invention is characterized in that the dropped cone is stopped in a state where it is floated by a predetermined height from the bottom surface in the frame. The position of the stopper according to the present invention is adjustable.

  Since the present invention includes a bottomed cylindrical deflector that covers the glass bulb, the glass bulb is hardly affected by external force and is not visible from the outside, so that the appearance is improved and the aesthetics are improved. Further, since a glass bulb is used as the heat sensitive part, the cost is lower than that of the multi-type.

In order to solve the problems of the conventional example, the present inventor repeated research and experiments on the assumption that a sprinkler head having both advantages of a frame type sprinkler head and a multi-type sprinkler head may be used.
As a result, a head body having a water outlet, a cone for closing the water outlet, a glass valve that presses the cone to close the valve, and a flange that is fixed to the flange of the head body and covers the glass valve. A bottom-cylindrical frame having a plurality of sprinkling openings formed at intervals in the circumferential direction, and a clamp fixing provided on the top plate portion of the frame and pressing the glass bulb in the valve closing direction It has been found that the problem can be solved by providing the member and the cone drop guide means. This invention is made | formed based on the said knowledge.

A first embodiment of the present invention will be described with reference to FIGS.
A plurality of closed sprinkler heads 1 are arranged at predetermined intervals on a sprinkler pipe of a fire extinguishing equipment (not shown).

  The sprinkler head 1 includes a head main body 3 having a water discharge port 2, a cone 5 that closes the water discharge port 2, a glass valve 6 that presses the cone 5 to close the valve, and a flange of the head main body 3. A bottomed cylindrical frame 10 fixed to 7 and covering the glass bulb 6; a fastening member 12 for pressing the glass bulb 6 in the valve closing direction; and a guide rod 14 for the drop guide means of the cone 5; It is equipped with.

  On the outer peripheral surface of the water discharge port 2 of the head body 3, a threaded portion 3a for screwing to a pipe (not shown) is formed. Three holes 3b are formed at equal intervals in the circumferential direction. The diameter of the flange 7 is formed larger than the diameter of the threaded portion 3a, and a locking groove 7a for locking the frame 10 is provided on the inner peripheral surface thereof.

  The cone (valve element) 5 is pressed against the valve seat of the water discharge port 2 via a disc spring 16. An insertion hole 5a for supporting the tip of the glass bulb 6 is provided on the lower surface side of the cone 5, and a through hole 5b in which the guide rod 14 is loosely fitted is provided on the outer periphery side in the circumferential direction. Three are provided at equal intervals.

  An inflatable liquid is sealed in the glass bulb 6. The front end of the glass bulb 6 is inserted into the insertion hole 5a of the cone 5, and the rear end thereof is pressed in the valve closing direction by a fastening member, for example, a fixing screw 12 with a driver groove 12a.

  The frame 10 includes a cylindrical portion 10a, an inverted truncated cone portion 10b continuous to the lower end of the cylindrical portion 10a, and a top plate portion 10c that closes the top surface of the truncated cone portion 10b. An engaging flange 10d that fits into the locking groove 7a is provided at the upper end of the cylindrical portion 10a.

  In the frame 10, a plurality of rectangular long holes 20 formed over the cylindrical portion 10a and the inverted truncated cone portion 10b are arranged at predetermined intervals in the circumferential direction. The number, shape, opening area, arrangement position, and the like of the water spout 20 are appropriately selected as necessary. The position of the long hole 20 is adjusted so that the glass bulb 6 can sense the hot air flow efficiently. For example, the position of the glass bulb 6 is adjusted so that the height of the long hole 20 and the height of the glass bulb 6 are substantially equal. Is done.

  Three escape holes 22 are provided in the lower part of the inverted truncated cone part 10b at equal intervals in the circumferential direction. The escape hole 22 prevents clogging of the water sprinkled part due to debris, dust, etc. generated when the glass bulb 6 is broken, but also functions as a hot air inlet / outlet and a water spray deflector. The escape hole 22 is formed in a circular shape having a larger opening area than the long hole 20, and is continuous with the long hole 20. The number, shape, opening area, arrangement position, and the like of the escape holes 22 are appropriately selected as necessary. In addition, the position of the escape hole 22 is adjusted so that the glass bulb 6 can efficiently sense the hot air flow. For example, the position of the glass bulb 6 is adjusted so that the glass bulb 6 can be seen inside the escape hole 22. Further, the long hole 20 and the escape hole 22 may be disposed independently of each other.

  A screw cylinder 24 into which the fixing screw 12 is screwed is provided in the center of the top plate portion 10c, and a through hole 10e for inserting and fixing the guide rod 14 is provided in the circumferential direction on the outer peripheral side. Three are provided at equal intervals.

  The guide rod 14 is a drop guide means for the cone 5, and the tip end portion of the guide rod 14 passes through the through-hole 5 b of the cone 5 and is press-fitted and held in the hole 3 b. Is provided. The stopper 26 determines the position where the cone 5 is stopped in consideration of the water distribution, and the guide rod 14 is selected with the stopper 26 provided at a desired position.

  For example, the sensitivity of the sprinkler head is classified into one or two types according to the fire fighting certification standard, but the effective radius needs to be larger than one or two types. In this case, it is possible to provide a sprinkler head that satisfies both specifications by properly using at least two types of guide rods 14 having different stopper positions.

  The stopper 26 is a nut with a screw hole (not shown), a bolt portion (not shown) is formed on the guide rod 14, and the nut is screwed onto the bolt portion, so that the position of the stopper 26 can be freely adjusted. May be.

The operation of this embodiment will be described.
When a fire occurs and a hot air stream enters the frame 10 from the long hole 20 and the escape hole 22 and the glass bulb 6 is heated, the liquid in the glass bulb 6 expands and the internal pressure rises. 6 is destroyed. At this time, the broken pieces of the glass bulb 6 that have been broken and dropped from the long hole 20 and the escape hole 22 to the outside of the frame 10 do not hinder water spraying.

  When the glass bulb 6 is destroyed, the cone 5 falls away from the valve seat, so that the water outlet 2 is opened. At this time, the cone 5 falls while being guided by the guide rod 14, and stops in a state where it floats by a predetermined height from the bottom surface in the frame 10 by the stopper 26 (see FIG. 3). Therefore, even if fragments of the glass bulb 6 remain inside the top plate portion 10c or in the vicinity of the screw cylinder 24, the cone 5 can be reliably dropped and stopped at a predetermined position.

  Fire extinguishing water w ejected from the water outlet 2 collides with the cone 5 and changes its traveling direction. A part of the fire extinguishing water w1 passes through the long hole 20 and is sprinkled into the far water sprinkling region, and the other is inside the cylindrical portion 10a. It collides with the wall surface, passes through the escape hole 22 and is sprinkled with water w2 in the vicinity watering area. At this time, since the position of the cone 5 is adjusted by the stopper 26, a desired watering distribution can be obtained.

A second embodiment of the present invention will be described with reference to FIG. 4. The same reference numerals as those in FIGS. 1 to 3 have the same names and functions.
The differences between this embodiment and the first embodiment are as follows.
(1) The frame 10 is a screw type instead of a fitting type. That is, instead of forming the locking groove 7a on the inner surface of the flange 7, a female thread portion 7f is formed, and instead of forming an engaging flange on the upper end portion of the cylindrical portion 10a of the frame 10, an outer peripheral surface thereof is formed. The male screw portion 10f that is screwed with the female screw portion 7f is formed.

  (2) The guide rod 14 is fixed to the cone 5 instead of fixing to the head body 3. The sliding rod 34 is fixed to the cone 5 via the guide ring 30. A stopper 36 is provided on the upper end side (cone 5 side) of the sliding rod 34, and the arrangement position thereof is determined in consideration of the height of the stop position when the cone 5 is dropped.

  (3) The top plate portion 10c of the frame 10 is provided with a through hole 10h into which the sliding rod 34 is loosely fitted.

  In this embodiment, when the glass bulb 6 is broken due to the occurrence of a fire, the cone 5 is dropped while being guided by the through-hole 10h together with the sliding rod 34 sliding in the through-hole 10h. Due to 36, it stops in a state where it floats by a predetermined height from the bottom surface in the frame 10. Therefore, as in the first embodiment, the cone 5 can be reliably dropped and stopped at a predetermined position. At this time, the position of the cone 5 can obtain a desired watering distribution by adjusting the arrangement position of the stopper 36.

It is a longitudinal cross-sectional view which shows 1st Example of this invention. It is a bottom view. It is a longitudinal cross-sectional view which shows the state (valve open state) different from FIG. It is a longitudinal cross-sectional view which shows 2nd Example of this invention.

Explanation of symbols

1 Sprinkler head 2 Water outlet 3 Head body 5 Cone 6 Glass valve 7 Flange
10 frames
12 Fixing screw
14 Guide rod
20 Long hole
22 Relief hole
26 Stopper

Claims (6)

A head body having a water outlet;
A cone that closes the outlet;
A glass valve that presses the cone to close the valve;
A bottomed cylindrical frame fixed to the flange of the head body and covering the glass bulb, wherein a plurality of water spouts are formed at intervals in the circumferential direction;
A tightening fixing member provided on a top plate portion of the frame and pressing the glass bulb in a valve closing direction;
The cone drop guide means;
A sprinkler head characterized by comprising:   2. The sprinkler according to claim 1, wherein the water spray port comprises a long hole formed over the cylindrical portion and the inverted truncated cone portion of the frame, and an escape port formed in the inverted truncated cone portion of the frame. head.   3. The sprinkler head according to claim 1, wherein the glass bulb is disposed at a position corresponding to the water spout. The cone drop guide means is a guide rod that penetrates the cone and is press-fitted and held in the head body, or fixed to the cone.
The sprinkler head according to claim 1, 2 or 3, wherein a stopper for restricting the falling of the cone is provided at a predetermined position of the guide rod.   5. The sprinkler head according to claim 4, wherein the position of the stopper stops the dropped cone with a predetermined height floating from the bottom surface in the frame.   The sprinkler head according to claim 4, wherein the position of the stopper is adjustable.

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