JPH0568271B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to fire sprinkler heads, and more particularly to multi-type sprinkler heads.

Conventional technology Conventional multi-type sprinkler heads use a multi-frame that integrates a deflector and a frame that supports this deflector, and has the ability to penetrate even in areas with strong airflow speeds and strong fires. It has the advantage of being able to spray large-sized fire extinguishing water. (Refer to Japanese Patent Publication No. 50-32558) Problems to be Solved by the Invention In the conventional multi-type sprinkler head, the multi-frame is large, so the overall size is large.

In view of the above circumstances, it is an object of the present invention to reduce the size of a multi-type sprinkler head.

Another purpose is to obtain water droplets with a large particle size.

Means for Solving the Problems This invention provides that the water outlet provided in the center of the head body is normally supported by a link mechanism and closed by a plug provided at the bottom of the deflector. In a fire-fighting sprinkler head, in which a link mechanism operates to open a water outlet in the event of a fire, and the fire-extinguishing liquid is sprayed around the fire extinguishing liquid by means of a deflector, the lower part of the head body includes an upper plate part and a lower surface of the upper plate part. It is a rectangular tube with a bottom formed higher than the protruding height of the plug, the outer diameter of which is less than the diameter of the upper plate, and a link mechanism that normally supports the plug at the bottom. is locked, and there is a hole in which the plug sits during watering, and each side wall has a small opening with a lower end located at a position higher than the top surface of the plug when the plug is seated in the hole, and a large opening that continues to the top of the small opening. This object is achieved by a multi-type sprinkler head provided with a deflector consisting of a rectangular tube body provided with openings and a skirt portion surrounding the upper portions of a plurality of large openings of the rectangular tube body. be.

Operation When the link mechanism is opened due to an outbreak of fire, etc., the water outlet is opened and fire extinguishing liquid hits the deflector. At this time, the extinguishing liquid collides with the stopper and is dispersed into a water stream C that scatters vertically toward the side wall, a water stream D that scatters obliquely toward the side wall, and a water stream E that scatters toward the corner wall.

The water flow C hits the side wall and becomes an upward water flow toward the upper plate portion of the deflector. This rising water flow C
seals the opening with its dynamic pressure, but a portion of it is pushed obliquely upward from the small opening by the static pressure generated within the deflector and becomes a water flow C1.

On the other hand, the water flow D hits the side wall and flows toward the corner wall, but it also hits the corner wall and becomes an upward water flow toward the upper plate portion of the deflector. At this time, the water flow D generates a swirling flow within the deflector, increasing the static pressure within the deflector.

Furthermore, the water flow E hits the corner wall and changes its flow direction, becoming an ascending water flow E toward the upper plate portion.

The rising water flows C and E hit the upper plate part,
This becomes a horizontal water flow E1, and this water flow E1 is discharged from the large opening to the outside of the rectangular cylinder, hits the skirt portion, and becomes a downward water flow E2.

The water flow C1 and the water flow E2 that have jumped out of the deflector in this way collide outside the deflector,
Water is sprayed around the sprinkler head in the form of large droplets.

Embodiment An embodiment of the present invention will be described with reference to the accompanying drawings, in which the same reference numerals have the same names and functions.

A deflector 40 consisting of an upper plate part 42, a rectangular cylinder body 41, and a skirt part 45 is provided at the lower part of a head body 10 having a water outlet 11 in the center.

The upper plate part 42 is the lower surface of the flange part 12 of the head body 10, and the flange part 12 is provided with a threaded part that threads into the threaded part of the annular body 44 and a skirt part 45.

The rectangular cylinder 41 has a rectangular cross section and an outer diameter that is less than or equal to the diameter of the upper plate portion 42 . Height, formed higher.

The bottom wall 411 of the rectangular cylinder 41 is provided with a hole 46 for attaching the stopper 30 having the protrusion 33, and each side wall 412 has a horizontally long large opening 432 at the top and a narrow width at the bottom. An opening 43 having a reverse convex shape in side view is formed with a U-shaped small opening 431, and the lower end of the small opening 431 of this opening 43 is located at a higher position than the upper surface of the plug body 30 during water sprinkling. .

34 is a leg piece that guides the plug body 30 when it is lowered; 44 is an annular body provided at the upper end of the rectangular cylinder body 41 and has a male threaded portion on the outer periphery; and 50 is a balancer having a protrusion 51; 51 comes into contact with the protrusion 33 of the stopper 30.

60 is a bowl-shaped first separation piece 62 having an inclined surface 61 and a cup-shaped second separation piece 62 having a flange 63 at the upper end.
The thermal separation part 70, which is formed by joining the separation piece 64 with a fusible alloy, has a head 71, a hook part 72, a convex part 73,
A pair of arms having a lower end 74 and a stopper 30
is supported by the head 71 of this arm 70.

This multi-type sprinkler head A has a link mechanism composed of an annular body 44, a thermally releasable part 60, and an arm 70. A rotational force is applied to support the locking point between the arm 70 and the lower end 74 of the arm 70.
engages the inclined surface 61 with strong lateral force.

When the thermal release part 60 is heated by the fire and the fusible alloy melts, the arm 70 starts rotating, and its lower end 74 slides on the inclined surface 61 of the first release piece 62. As a result, the first separation piece 62 is peeled downward from the second separation piece 64 and dropped.

Then, the arm 70 is disengaged from its lower end 74, rotates all at once, and falls while separating from the second separation piece 64.

At the same time, the stopper 30 falls down while being guided by the legs 34 due to its own weight and the pressure of the extinguishing liquid, and seats in the hole 46, and the extinguishing liquid supplied from the water outlet 11 is scattered vertically onto the side wall 412. The water is dispersed into a water stream C, a water stream D that scatters obliquely toward the side wall 412, and a water stream E that scatters toward the corner wall 413. At this time, the plug body 30 functions as a cone that changes the direction of the water.

Then, the water flow C hits the side wall 412 and changes its flow direction, becoming an ascending water flow C toward the upper plate portion 42. This water flow C seals the opening 43 due to its dynamic pressure, but a portion of it is pushed obliquely upward from the small opening 431 by the static pressure F generated within the deflector 40 and becomes a water flow C1.

On the other hand, the water flow D hits the side wall 412 and changes its flow direction and flows toward the corner wall 413, but it also hits the corner wall 413 and becomes a water flow E heading toward the upper plate portion 42. At this time, the water flow D generates a swirling flow within the deflector 40, so that the deflector 40 is filled with extinguishing liquid and the static pressure increases.

Further, the water flow E hits the corner wall 413, changes its flow direction, and becomes an upward water flow E toward the upper plate portion 42. The rising water flows C and E change their flow direction when they hit the upper plate part 42 and become a lateral water flow E1, but this water flow E1 seeks escape through the extinguishing liquid that is successively supplied from the water outlet 11. Large opening 43
2, the water flows out of the rectangular cylinder 41, hits the skirt portion 45, and changes its flow direction to become a water flow E2 that heads diagonally downward. At this time, the skirt portion 45 functions as a part of the deflector 40.

The water stream C1 and the water stream E2 that have flown out of the deflector 40 in this manner collide outside the deflector 40, and are turned into water droplets and sprayed around the sprinkler head A.

At this time, the water flow C1 and the water flow E2 follow a long path before colliding outside the rectangular tube body 41, so the energy at the time of collision becomes small, and large-sized water droplets are obtained.

Other Embodiments The present invention is not limited to the above embodiments. For example, the rectangular cylinder may have a triangular shape, a pentagonal shape, a hexagonal shape,
It may also be a square shape.

The lower part of the annular body may be made longer to form a skirt part, but in this case, the inner diameter of the annular body may be made equal to the diagonal length of the rectangular cylinder 4, or the annular body may be provided. First, a male threaded portion for attachment may be provided at the corner of the rectangular cylinder.

The upper slope portion may be provided separately without using the lower surface of the flange portion, and the link mechanism consisting of the thermal separation portion and the pair of arms may have another shape.

Effects of the Invention Since the present invention is configured as described above, when water is discharged, the extinguishing liquid from the water outlet passes through the inlet of the upper plate, collides with the plug body, and scatters toward the side wall.
At this time, since the lower end of the small opening is located at a higher position than the upper surface of the plug body, all of the extinguishing liquid collides with the side wall and is forcibly changed in its flow direction, and some of it is due to the static pressure generated inside the deflector. The others are pushed out through the small opening and flow diagonally upward, while the rest rises along the side wall, collides with the upper plate, is discharged from the large opening, hits the skirt portion, and flows diagonally downward. In this way, the two water streams whose energy has decreased due to multiple collisions collide outside the deflector and are sprayed as large water droplets.

Further, by forming the rectangular cylinder, among the extinguishing liquid that hits the plug body and scatters in the horizontal direction, that which hits the side wall diagonally flows toward the corner wall, thereby creating a swirling flow inside the deflector. Therefore, the inside of the deflector is filled with extinguishing liquid and the static pressure increases, so that part of the extinguishing liquid rising along the side wall can be pushed out through the small opening.

More specifically, the multi-frame that constitutes the deflector can be made smaller.

Therefore, it is possible to obtain a multi-type sprinkler head that is smaller overall than the conventional example.

When the water outlet is opened due to an outbreak of fire, etc., the extinguishing liquid hits the stopper and is dispersed, then part of it becomes a water stream C1 that is pushed diagonally upwards from the small opening, and the rest is released from the large opening and flows into the skirt section. The water flow E2 flows diagonally downward.

Then, the water stream C1 and the water stream E2 collide with the deflector water and become water droplets, but at this time, both the water streams C1 and E2
follows a long path before colliding, so
The energy of collision is small.

Therefore, water droplets with a relatively large particle size can be obtained, resulting in water droplets of extinguishing liquid that have the ability to penetrate strong air currents and strong flames.

[Brief explanation of the drawing]

1 to 4 are views showing an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view of the deflector, and FIG. 3 is a sectional view taken along the line -- of FIG. FIG. 4 is a cross-sectional view taken along the line -- in FIG. 2, and FIGS. 5 to 7 are diagrams showing the state of the extinguishing liquid during water spraying. 10...Head body, 11...Water outlet, 30...
...Plug body, 41... Square tube body, 42... Upper plate part, 43
...Opening, 45...Skirt portion, 46...Hole.

Claims (1)

[Claims] 1. Normally, a water outlet provided in the center of the head body is supported by a link mechanism and is closed by a plug provided at the bottom of the deflector, so that in the event of a fire, the link mechanism is closed. In a fire-fighting sprinkler head that operates to open a water outlet and spray fire-extinguishing liquid to the surrounding area using a deflector, the head body includes an upper plate part attached to the lower part of the head body, and a lower surface of the upper plate part, and the stopper. It is a rectangular tube with a bottom that is formed higher than the protruding height of the body, and the outer diameter is less than the diameter of the upper plate. A link mechanism that supports the stopper is normally locked at the bottom, and is used for water spraying. Sometimes the hole where the stopper sits is
Each side wall is provided with a small opening whose lower end is located higher than the top surface of the plug when the plug is seated in the hole, and a large opening continuous to the top of the small opening; A multi-type sprinkler head provided with a deflector consisting of a skirt portion surrounding the upper part of a plurality of large openings. 2. The rectangular cylindrical body has an annular body with a threaded part at the upper end, and the head body has a flange part with a threaded part that screws into the threaded part of the annular body. A multi-type sprinkler head according to claim 1. 3. The multi-type sprinkler head according to claim 1 or 2, wherein the upper plate portion is the lower surface of the flange portion of the head body. 4. The multi-type sprinkler head according to claim 1, wherein the skirt portion is attached to the upper plate portion.