JP3458315B2 - Sprinkler head - Google Patents

Description

Detailed Description of the Invention

[0001]

[Industrial application] Fire extinguishing equipment is installed on the ceiling of offices, factories, etc., and a heat-sensitive member is used to open the water outlet when the surrounding temperature reaches a certain temperature due to the heat of a fire, and A sprinkler head that extinguishes water by spraying water is known. When the sprinkler head is classified according to the structure of the deflector that has a water sprinkling function, the frame type has a U-shaped or horseshoe-shaped frame where the deflector is fixedly exposed on the ceiling, and the flash type, which causes the deflector part to drop and sprinkle water when a fire occurs. It is roughly divided into.

In addition, the above heat-sensitive member has a low melting point of Pb-
Solder containing Sn alloy as a main component, a glass bulb in which a special liquid having a high expansion coefficient is enclosed in a glass tube, and the like are used. Generally, the temperature (operating temperature) at which this kind of solder or glass bulb or other heat-sensitive member operates due to the heat of fire is 72 ° C and 10
It is set at 4 ° C and is usually displayed on the surface of the heat-sensitive member.

The present invention relates to a sprinkler head as described above, and more particularly to a sprinkler head effectively applied to a frame type using a glass valve as a heat sensitive member.

[0004]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional sprinkler head, and shows a vertical side view of the sprinkler head disclosed in Japanese Utility Model Publication No. 53-1839.

In FIG. 5, 1 is a main body of the sprinkler head, 2 is an annular groove, 3 is a water discharge port, 4 is a collar portion, 5 is a hole, and 6
Is a central portion, 7 is a radial deflector, and 8 is a U-shaped frame constituting a support. Further, 9 is a spring, 10 is a glass bulb made of a hard glass ampoule, and 11 is a cap-like plug.

When a fire occurs in the sprinkler head as described above, the glass bulb 10 which is vertically arranged in the central portion 6 and which supports the hat-shaped plug 11 on the spring 9 is broken and scattered at the operating temperature. Then, the supported cap 11 is pushed out to open the water discharge port 3, and the pressurized water is ejected from the water discharge port 3. As a result, the jetted pressurized water is sprayed onto the radial deflector 7, and fire extinguishing water is sprinkled onto the floor surface within a certain range.

[0007]

In the conventional frame type sprinkler head as shown in FIG. 5, a heat sensitive member composed of a glass bulb 10 made of glass is supported by a U-shaped frame 8 as shown in the figure. Most exposed.
Therefore, the exposed heat-sensitive member receives some external force, is destroyed by an action other than heat when a fire occurs, and pressurized water is ejected from the water discharge port 3 to be sprayed.
Therefore, the cause of the operation of the glass bulb 10 is virtually determined as to whether it is caused by an erroneous operation such as when the glass valve 10 is erroneously operated by an external force as described above, or whether it is caused by an actual fire. There was a problem that it could not be confirmed.

The present invention has been made in order to solve the problems of the conventional sprinkler head as shown in FIG. 5, and it is possible to easily confirm the operating cause and operating temperature of the glass bulb, and to investigate the fire situation after a fire. It is an object of the present invention to realize a frame-type sprinkler head using a glass valve suitable for the above.

[0009]

According to the present invention, an irreversible temperature-sensitive color changing body that changes color depending on temperature is provided on a part of the outer surface of a component member that does not scatter during a fire of a sprinkler head. It uses a discoloring chip that discolors at a temperature higher than the operating temperature of the heat-sensitive member.

Further, according to the present invention, a main body having a frame in which a mounting portion provided with a water discharge port and a support unit are connected by an arm unit, a water discharge valve for closing the water discharge port of the main body, and a body supported by the support unit. In a frame-type sprinkler head including a heat-sensitive member such as a glass valve that presses the water discharge valve,
An irreversible temperature-sensitive color changing body that changes color according to temperature is provided on the surface of the main body deflector or the frame, and the color-changing chip that changes color at a temperature including the operating temperature of the heat-sensitive member is used for the temperature-sensitive color changing body. is there.

[0011]

In the normal state, the water discharge valve supported by the push screw and the heat sensitive member such as the glass valve is pushed up, and the water discharge port communicating with the pressurized water source is kept closed. When a fire occurs, the heat causes the liquid enclosed in the glass bulb to thermally expand, destroying the hard glass and scattering.
At this time, the water discharge valve supported by the glass valve falls off, and the water at the water discharge port held in the closed state is ejected. The jetted water is scattered in all directions by a deflector,
The fire is extinguished by spraying water onto the floor.

On the other hand, the heat generated by the fire causes the airflow to be blown up toward the ceiling while raising the temperature. When the temperature of the blown airflow exceeds the discoloration temperature, the element of the discoloration chip provided in the main body changes from white to reddish orange, for example. After that, when the fire investigation after the fire was extinguished,
The discoloration of the discoloration tip confirms that the glass bulb was activated by a fire, not by an external force.

[0013]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of an embodiment of the present invention, FIG. 2 is a side view, and FIG. 3 is a sectional view. In the drawings of the embodiment of the present invention, the same parts as those of the conventional device are denoted by different reference numerals, and there are differences in shape, configuration, and the like.

1 to 3, 1 is a sprinkler head, and 2 is a main body of the sprinkler head 1. A metal material such as brass or aluminum alloy is used for the main body 2,
It is molded by a casting machine or die casting machine. 3 is a screw formed on the upper end of the main body 2, 4 is a hexagonal screw head,
Reference numerals 5 and 5 are left and right arm portions, and 6 is a support portion. The screw 3 and the screw head 4 constitute a bolt-shaped mounting portion 7, and the arm portion 5 and the support portion 6 drawn out from the mounting portion 7 constitute a frame 8. The arms 5 and 5 are branched downward from both sides of the mounting part 7, the middle part is slightly inclined inward, the lower end is bent horizontally, and the tips are both supported.
Are linked to.

Reference numeral 9 denotes a water discharge port formed in the mounting portion 7 and opening upward in a tapered shape. Reference numeral 10 denotes a screw hole provided in the support portion 6. The water discharge port 9 and the screw hole 10 are provided on the axis O-O of the main body 2. Although not shown, the main body 2 is connected by a mounting portion 7 to a conduit pre-installed on the ceiling of an office or factory, and the water outlet 9 is connected to a pressurized water source for fire extinguishing via this conduit.

Reference numeral 11 is a water discharge valve, 12 is a packing, and 13 is a glass valve. Further, 14 is a push screw, 15 is a deflector, and 16 is a washer. The glass bulb 13 is composed of a thin, hard glass tube having sharpened upper and lower shoulders with a sharp tip, and a liquid such as ether colored in red and having a high coefficient of thermal expansion is enclosed leaving small bubbles. The glass bulb 13 made of hard glass is given strength in the axial direction.
The glass valve 13 is interposed between the water discharge valve 11 and the push screw 14, and a certain upward pressing force is applied to the glass valve 13 to overcome the load applied to the water discharge valve 11 by the above-mentioned pressurized water and to prevent the water discharge port 9 from moving. It is configured to hold the closed state.

Reference numeral 20 is a color-changing chip of a temperature-sensitive color changing body. The discoloration tip 20 is attached to the upper portion of the arm portion 5 so that it can be easily seen from the outside and is not exposed to water spray. The color change chip 20 is called, for example, "thermo label" (trade name), and uses a temperature indicating element utilizing the melting point of a stable fusible pigment. The color-changing chip 20, as shown in FIG. 4 (a), comprises a rectangular base 21 and a circular, completely irreversible element 22 here. The outer square base 21 has, for example, a white primary color and is invariant to temperature changes. Also, the primary color of the circular element 22 on the inner side is, for example, white, so that the discolored state is maintained by discoloring, for example, red-orange at a discoloring temperature of 70 ° C., which is slightly lower than the operating temperature of 72 ° C. of the glass bulb 13 described above. Has become.

The operation of the embodiment of the present invention having such a configuration will be described below.
It will be described next. Sprinkler head 1 shown in the examples
Are connected to the pressurized water source as described above, and are attached to the ceiling of an office or the like by the screws 3 of the attaching portion 7 and arranged regularly. In the normal state, as described above, the closed state of the water discharge port 9 communicating with the pressurized water source is maintained by the push screw 14 on the axis O-O and the water discharge valve 11 supported by the glass valve 13.

When a fire occurs, the liquid enclosed in the glass bulb 13 is thermally expanded by the heat of the fire, and the ampoule-shaped hard glass is broken and scattered. At the same time, the water discharge valve 11 supported by the glass valve 13 on the support portion 6 falls, and water for extinguishing fire is ejected from the water discharge port 9 held in the closed state. The blown water is diffused in all directions by the deflector 15 attached to the support portion 6, and is sprayed uniformly in a substantially conical shape toward the floor centering on the axis O-O to extinguish the fire.

In this case, an air flow accompanied by heat due to the occurrence of a fire is blown up toward the ceiling while gradually increasing the temperature. When the temperature of the blown airflow exceeds 70 ° C, the element 22 of the discoloring chip 20 of the arm 5 is exposed to this airflow, and the color changes from white to red-orange as shown in Figs. 4 (a) and 4 (b). To do. When the temperature in the vicinity of the sprinkler head 1 exceeds the operating temperature of 72 ° C., the glass bulb 13 is destroyed as described above and the fire extinguishing operation is carried out.

At that time, the element 22 of the color change chip 20
Is completely irreversible and changes color from white to reddish orange, and the color change state at the time of this color change is maintained. Therefore, in the fire investigation after extinguishing the fire, it was confirmed that the temperature around the sprinkler head 1 was at least 70 ° C. in the fire environment. Therefore, it is confirmed that the glass bulb 13 is not operated by an external force but is operated by a fire. It should be noted that when the glass bulb 13 is destroyed by an external force, the color of the element 22 of the color-changing chip 20 remains white, which means that the element is operated by the external force.

Particularly, according to the constitution of the color-changing chip 20 of the embodiment, the element 2 at the center of the square base 21 having no color-change.
Since only 2 turns red-orange, the cause of the operation and the operating temperature of the glass bulb 13 can be clearly recognized by the red "sun-round" color display on a white background. In addition, if both the colors of the base 21 and the element 22 are selected to have an opposite color or a complementary color relationship, there is an advantage that a clear color display can be performed regardless of the ground color of the main body 2.

In the above-described embodiment, the sprinkler head of which the main body is connected to the mounting portion and the supporting portion has been described as an example, but the main body may be a separable type which can be vertically separated near the mounting portion. Good. Further, although a single color-changing chip having a combination of a non-color-changing base and a completely irreversible element has been described, the number of chips, the combination of the base and the element, etc. may be appropriately changed. Further, it is also possible to discolor the numeral representing the operating temperature, or to use discolored paint or discolored crayon. Further, the material and shape of the main body and the glass bulb are not necessarily limited to the embodiment. In addition,
The discoloration tip 20 may be attached at any position as long as it is a part of the outer surface of a component member that does not scatter during a fire of the sprinkler head, for example, a member left on the ceiling such as a frame or a deflector, or the side surface of the screw head 4. The bottom of the deflector 15 is best because it will not be stripped when sprinkling.

The operating temperature of the sprinkler head is appropriately set in consideration of the atmosphere of the place where it is attached. Therefore, the temperature at which the color of the temperature-sensitive color changing body provided in the sprinkler head changes is set to be the same as the operating temperature of the sprinkler head, and the color that changes color is set differently for each operating temperature. For example, the one at 72 ° C is red-orange,
If the temperature of 104 ° C is different from red-orange, for example, if the head is provided with a temperature-sensitive color changing body that changes color to purple, check how many times the operating temperature of the sprinkler head was after the water was discharged from the head. You can Further, the color of the base for the color-changing chip may be changed in advance for each operating temperature.

In this embodiment, the frame type sprinkler head using the glass valve as the heat sensitive member has been described, but as the heat sensitive member, instead of the glass valve, solder such as fusible link is used, and as the main body of the sprinkler head. A flash type or multi type sprinkler head may be used. This is because in the case of solder, when the solder is activated by a fire, it remains after the solder is melted, but in reality, the fusible link is not scattered when water is discharged, and it is often difficult to recover the fusible link. Also, when the flash type sprinkler head is actuated by external force, etc., a root remains in the protective cover, but this is also scattered at the time of water discharge, and based on that, it is confirmed whether it operated due to fire or due to external force. You cannot do it.

[0026]

According to the present invention, an irreversible temperature-sensitive color changing body that changes color depending on temperature is provided on a part of the outer surface of a component that does not scatter during a fire of a sprinkler head, and the temperature-sensitive color changing body operates the heat-sensitive member. A sprinkler head was constructed using a discoloring chip that discolors above a certain temperature.

Further, according to the present invention, a main body having a frame in which a mounting portion provided with a water discharge port and a support unit are connected by an arm unit, a water discharge valve for closing the water discharge port of the main body, and a body supported by the support unit. In a frame-type sprinkler head including a heat-sensitive member such as a glass valve that presses the water discharge valve,
A sprinkler head using a color-changing chip that is provided with an irreversible temperature-sensitive color changing body that changes color depending on temperature on the surface of the main body deflector or the frame, and that changes color at a temperature including the operating temperature of the heat-sensitive member or higher. Configured. Also,
We constructed a sprinkler head in which the temperature-sensitive color changing body was provided at a position where it was not exposed to water spray. In addition, a sprinkler head was constructed using a color-changing chip that displays a color change on the display part of the base and the element on the temperature-sensitive color changing body. In addition, a sprinkler head is constructed in which the temperature at which the color of the temperature-sensitive color changing body changes is set to be different for each operating temperature of the sprinkler head.

As a result, in a fire investigation after extinguishing, it was confirmed that the fire environment was above the discoloration temperature even though the temperature near the sprinkler head was small. Therefore, it is confirmed that the glass bulb was not operated by an external force, but was actually operated by a fire. In particular, by selecting a base and an element that are in the opposite color or a complementary color relationship with the discoloration chip, it is possible to clearly display colors regardless of the ground color of the main body.

Therefore, according to the present invention, it is possible to easily confirm the operating cause and operating temperature of the heat-sensitive member, and to provide a sprinkler head suitable for investigating a fire situation.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a side view of the embodiment of the present invention.

FIG. 3 is a sectional view of an embodiment of the present invention.

FIG. 4 is an operation explanatory diagram of the embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional sprinkler head.

[Explanation of symbols]

1 sprinkler head 2 body 3 screws 4 screw head 5 Arm 6 support department 7 Mounting part 8 frames 9 water outlet 10 screw holes 11 Water discharge valve 12 packing 13 glass bulb 14 push screw 15 Deflector 16 washers 20 discolored chips 21 base 22 elements OO axis center

Claims (5)

(57) [Claims] 1. An irreversible temperature-sensitive color changing body that changes color depending on temperature is provided on a part of the outer surface of a component member that does not scatter during a fire of the sprinkler head, and the temperature including the operating temperature of the heat-sensitive member. A sprinkler head that uses a color-changing chip that changes color as described above. 2. A main body having a frame in which a mounting portion provided with a water discharge outlet and a support portion are connected by an arm portion, a water discharge valve for closing the water discharge outlet of the main body, and the water discharge valve supported by the support portion. In a frame-type sprinkler head including a heat-sensitive member such as a glass bulb to be pressed, an irreversible temperature-sensitive color changing body that changes color depending on temperature is provided on the surface of the main body deflector or the frame, and the temperature-sensitive color changing body is provided. A sprinkler head using a color-changing chip that changes color at a temperature including the operating temperature of a heat-sensitive member. 3. The sprinkler head according to claim 1, wherein the thermochromic body is provided at a position that is not exposed to water spray. 4. The sprinkler head according to any one of claims 1 to 3, wherein the temperature-sensitive color changing body is provided with a color changing chip for displaying a color change at a display portion of a base and an element. 5. The sprinkler according to claim 1, wherein the temperature at which the color of the thermochromic body changes is set to be different for each operating temperature of the sprinkler head. head.