JP2003010355A - Pre-operating type sprinkler fire extinguishing equipment and flowing water detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide pre-operating type fire distinguishing equipment of simple equipment constitution and a flowing water detector to be used for the fire extinguishing equipment. SOLUTION: Concerning the flowing detector, a partition is provided between a primary side and a secondary side, a communicating port is formed at the partition, a control chamber is formed of a valve upper part and the inner wall of a first side chamber on the communicating port face of the first side chamber, the primary side chamber is connected with a primary side piping communicated to a water source, a secondary side chamber is connected with a secondary side piping connected with a sprinkler head, and the control chamber is constantly filled with a fluid to close the communicating port with a valve energized with a spring from an upper part by an elastic body to permit only a small amount of water to pass through. In the pre-operating type fire extinguishing equipment consisting of the flowing water detector, a fire sensor installed in the neighborhood of the sprinkler head and a controller for inputting an output signal from the flowing water detector and that from the fire sensor and generating a warning and signal, a sprinkler head operation signal and a valve opening signal are outputted according to the position of a valve rod linked with the lifting movement of the valve of the flowing water detector.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-operation type sprinkler fire extinguishing system and a flowing water detecting device used therein.

[0002]

2. Description of the Related Art Conventional pre-operated sprinkler fire extinguishing equipment is provided with an opening valve called a pre-operation valve between a water supply pipe and a water flow detecting device, and a high pressure fire extinguishing water is filled in the primary side of the pipe. A closed type sprinkler head is provided at the end portion of the secondary side by enclosing pressurized air on the secondary side. A fire detector is installed near the closed type sprinkler head.

When a fire occurs, the pre-operation valve is opened by the operation of the fire detector to fill the sprinkler head with fire-extinguishing water, and the heat of the fire opens the sprinkler head to spray the fire-extinguishing liquid.

In the above-mentioned pre-action type sprinkler fire extinguishing equipment, since the compressed air is normally enclosed in the pipe at the 2 o'clock side, when the sprinkler head malfunctions due to an external impact or the like, the fire extinguishing water flows out. No water damage will occur. Further, the water flow detection device can output a head operation signal to notify a person that the sprinkler head is malfunctioning.

Therefore, the pre-operation type sprinkler fire extinguishing equipment is installed in places such as department stores, hotels, museums, etc. where water damage due to malfunctions other than during a fire is extremely disliked.

[0006]

However, the conventional pre-actuated sprinkler fire extinguishing equipment requires a compressor, a pressure switch, etc. for enclosing pressurized air in the piping on the secondary side, and the entire equipment is complicated. There was expensive.

In order to simplify the equipment, it is possible to provide an operation detection device for each sprinkler head instead of the above-mentioned flowing water detection device for detecting the sprinkler head operation signal, but the cost increases as the equipment size increases. It will be up.

Therefore, an object of the present invention is to provide a pre-operation type sprinkler fire extinguishing equipment having a simple equipment construction and a flowing water detecting device used for the fire extinguishing equipment.

[0009]

In order to achieve the above object, the invention according to claim 1 is characterized in that a partition wall is provided between the primary side and the secondary side, and the partition wall is provided with a communication port. The control chamber is formed by the valve body upper part and the inner wall of the primary side chamber on the communication port surface of the primary side chamber, the primary side chamber is connected to the primary side piping leading to the water source, and the secondary side chamber is connected to the sprinkler head. Connected to a pipe, the control chamber is normally filled with fluid, and the communication port is closed by a valve body that is spring-biased from above by an elastic body, and a water flow detection device that allows only a small amount of water to flow and the sprinkler head. In a pre-actuated sprinkler fire extinguisher equipment consisting of a fire detector installed near, and a control device that inputs an output signal from the running water detection device and an output signal from the fire detector and issues an alarm / signal. ,Previous The position of the valve stem in conjunction with the lift movement of the valve body of the water flow detection device in which the sprinkler head actuation signal and the valve body opening signal is output.

According to a second aspect of the present invention, a pipe to which a sensing head is connected is connected to the control chamber of the flowing water detecting apparatus according to the first aspect to fill a fluid, and the valve body is opened by opening the sensing head. It is a pre-operation type sprinkler fire extinguishing equipment comprising a running water detection device and a control device which inputs an output signal from the running water detection device and issues an alarm / signal.

According to a third aspect of the invention, there is a trumpet-shaped flange on the bottom surface of the valve body of the flowing water detection apparatus according to the first and second aspects, which is larger than the outer diameter of the valve seat contact surface of the valve body and widens downward. In the flowing water detection device, a shaped elastic body is installed and fixed, and the elastic body is provided with small holes or narrow grooves through which water can pass on the primary side and the secondary side.

According to a fourth aspect of the present invention, in the flowing water detecting device according to the third aspect, the valve rod of the flowing water detecting device has a valve rod that is installed and fixed to the valve body and has a tip protruding outside the flowing water detecting device. This is a water flow detection device in which a displacement detection switch is installed near the protrusion.

A fifth aspect of the present invention is the flowing water detecting device according to the fourth aspect, wherein the displacement detecting switch is provided with a delay function.

According to a sixth aspect of the present invention, there is provided the pre-operated sprinkler fire extinguishing equipment according to the first to fifth aspects,
This is a pre-operation type sprinkler fire extinguishing system that outputs a sprinkler head operation signal by detecting the pressure decrease in the secondary side piping.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. 1 is a system diagram of a pre-operation type sprinkler fire extinguishing equipment of the present invention, FIG. 2 is a cross-sectional view of a water flow detecting device used in the fire extinguishing equipment of FIG. 1, FIG. 3 is a cross-sectional view of a flange portion, and FIG. 4 is an incorrect sprinkler head. FIG. 5 shows a system diagram of the pre-operation type sprinkler fire extinguishing equipment using the sensing head, when the running water detecting device operates.

The pre-operation type sprinkler fire extinguishing system of the present invention comprises a water source W, a flowing water detecting device A, a sprinkler head H, a fire detector S and a control device C.

The water source W stores fire extinguishing water, and the pump P
The fire extinguishing water can be pumped up and supplied from the primary side pipe I through the flowing water detection device to the sprinkler head H installed in the secondary side pipe II.

The running water detector A has a primary side pipe I and a secondary side pipe II connected to each other, and the valve body is normally closed to prevent the extinguishing water from flowing from the primary side to the secondary side. The details of the configuration of the water flow detection device A are shown below.

In FIG. 2, the main body 1 of the water flow detecting device A is divided into a primary side chamber 3 and a secondary side chamber 4 by a partition wall 2. The horizontal portion of the partition wall communicates with the primary side chamber 3 and the secondary side chamber 4. An opening 5 is provided, and an upper portion of the communication opening 5 serves as a valve seat surface that contacts the valve body 8, and an O-ring 6 is embedded as a water leakage prevention member.

The liner 7 is installed above the communication opening 5, the outer shape of the liner 7 is formed so as to fit into the upper inner peripheral shape of the main body 1, and the inside is hollowed into a cylindrical shape to form an inner peripheral portion. The surface is smooth so that the valve body 8 can slide smoothly.

A space defined by the upper surface of the valve body 8 and the upper space of the main body 1 of the pre-operation type water flow detection device is used as a control chamber 12, and the control chamber 12 is closed by a lid 13. The lid 1
A compression spring 14 is provided between the lower surface of 3 and the upper surface of the valve body 8.

A pipe communicating with the primary side is connected to a pipe connection port 13a formed in the lid 13, and a check valve 11 for filling a liquid into the control chamber from the primary side is installed in the pipe. There is. The check valve 11 has a smaller diameter than the start valves V2 and V3.

The pipe connection port 13b has a start valve V2,
The pipe to which V3 is connected is connected. The control chamber 12 is constantly filled with liquid, and the valve body 8 is pressed against the valve seat surface by the fluid pressure and the force of the compression spring 14 to close the communication opening 5.

The spindle 15 is screwed to the valve body 8 by a nut through the elastic material 30 and the plate 30a by the male screw 15a at the lower end. At the top of the spindle 15 is a step 15
b is formed, and the actuators of the limit switches SW1 and SW2 are in contact with the step portion 15B.

When the spindle 15 moves up and down in conjunction with the lift movement of the valve body 8, the actuators of the limit switches SW1 and SW2 in contact with the step portion 15B act to change the ON / OFF state. Therefore, the vertical movement of the valve body can be detected by the limit switches SW1 and SW2.

The valve body 8 has a cylindrical shape, a flange portion is provided on an upper portion thereof, and an O-ring 9 is installed on the outer periphery of the flange portion. An elastic material 30 capable of passing a small amount of water from the primary side to the secondary side is fixed to the bottom surface of the valve body by screwing it with a male screw 15a of a spindle 15 and a nut via a plate 30a.

The elastic member 30 has a flange shape, and the outer peripheral side of the flange is a trumpet shape which spreads downward and forms a hypotenuse 31. A plurality of small holes 32 that allow a small amount of water to flow from the primary side to the secondary side are formed on the oblique side 31. The outer peripheral edge 33 of the elastic member 30 is curved upward, and the portion contacting the valve seat is a curved surface. As a material for forming the elastic material 30, rubber, synthetic resin, fluororesin or the like is suitable.

In the sprinkler head H, the heat-sensitive decomposition portion is disassembled by sensing the heat of fire and the valve body is opened. The details of the sprinkler head H are well known to those skilled in the art, and are different from the gist of the present invention, and a further description thereof will be omitted.

As the fire detector S, there are a fire detector that detects a fire based on temperature, a smoke detector, a flame detector, and the like, but a fire detector that can detect a fire earlier than the sprinkler head is activated is used.

The control device C receives the output signals of the limit switches SW1 and SW2 of the running water detection device A and the output signal from the fire detector, and activates the pump P and opens the valve body of the running water detection device A. Or a status signal of fire extinguishing equipment.

Next, the operation of the pre-operation type sprinkler fire extinguishing equipment of the present invention will be described.

When a fire occurs, the fire detector S first detects the fire and outputs a fire signal to the control device C. When the control device C receives the fire signal, the activation valve V2 is opened to allow the fluid in the control chamber 12 of the water flow detection device A to flow out, and the valve body 8 is opened to allow the fire extinguishing water to flow out to the secondary pipe II. .

When the valve body 8 is opened by the lift motion, the spindle 15 installed and fixed to the valve body also moves upward in conjunction with it. The limit switch SW2 is turned on by the movement of the spindle 15, and a valve opening signal is output to the control device C.

When the control device C receives the fire signal or the valve opening signal, the control device C outputs an alarm to inform the person that the fire extinguishing equipment has started.

Simultaneously with the opening of the valve body of the flowing water detector A, the pump P is activated to pump up the fire extinguishing water from the water source W and supply the fire extinguishing water to the secondary side pipe II.

When the fire progresses, the sprinkler head H
Is activated by the heat of the fire, and extinguishes the fire by spraying fire-fighting water filled in the secondary piping.

Next, a case where the sprinkler head H is operated except during a fire will be described.

When the sprinkler head H receives an external shock or the like to open the valve body, the fire extinguishing water filled in the secondary side flows out to reduce the pressure in the secondary side pipe. Then, the fire extinguishing water in the primary side pipe passes through the small hole 32 of the elastic material 30 installed on the bottom surface of the valve body 8 of the flowing water detection device A and flows out into the secondary side pipe, but from the small hole 32 to the secondary side chamber. Since only a small amount of fire extinguishing water flows out, if the outflow amount from the secondary side sprinkler head is larger than the water amount passing through the small holes 32 from the primary side, the pressure in the primary side chamber 3 and the control chamber 12 communicating with the primary side chamber 3 Exceeds the pressure in the secondary side chamber 4, the valve body 8 moves downward, and the elastic material 30 is pressed by the communication opening portion 5 to be in a crushed state as shown in FIG.

In the state shown in FIG. 4, since the plate 30a on the bottom surface of the valve block the communication opening 5, the primary side chamber 3
The supply of fire extinguishing water from the secondary side chamber 4 to the secondary side chamber 4 is stopped. Further, since the spindle 15 also moves downward due to the movement of the valve body 8, SW1 is turned on, the control device C receives a signal, outputs a secondary side decompression alarm, and can inform a person of an abnormality of the fire extinguishing system. .

When the pressure in the secondary side pipe decreases due to changes in temperature, fire extinguishing water is supplied from the primary side to the secondary side through the small holes 32 of the elastic material 30 to maintain the pressure equal. Be drunk

As another embodiment, as shown in FIG. 5, it is also possible to construct a fire extinguishing facility by using a sensing head K instead of the fire detector. Specifically, in the water flow detection device A of FIG. 2, the sensing pipe to which the sensing head K is connected is connected to the pipe connection port 13b. At that time, the sensing head K is connected to the secondary pipe I.
Install a sprinkler head that operates faster than the sprinkler head H installed in I.

The operation of fire extinguishing equipment using the sensing head K will be described. When a fire occurs, the sensing head K
Is activated, the fluid in the sensing pipe flows out to the outside, and the control room 1
The pressure in 2 decreases and the valve body 8 moves upward, so that the communication opening 5 can pass water, and the extinguishing water can flow out from the primary side pipe I to the secondary side pipe II.

Further, the limit switch SW2 is turned on by the upward movement of the valve body 8 and outputs a valve opening signal to the control device C. Subsequent actions are similar to those with the fire detector.

In the pre-operation type sprinkler fire extinguishing equipment described above, when the pressure of the fire extinguishing water in the secondary side pipe fluctuates due to some phenomenon, the valve body 8 may move due to the lift motion, but at that time, the limit Switch SW
1 and SW2 may be activated to give a false alarm.

In that case, when a limit switch having a delay function is installed to prevent false alarms, or when the control device C is provided with a delay function and the operation signal of the limit switch is continuously input for a predetermined time or more, It can be set by executing the following actions.

In the above embodiment, the spindle 15
Although the limit switch is used as the detection switch installed at the tip of the, the detection switch other than the limit switch can be used as long as it can detect the movement of the spindle.

As yet another embodiment, in the pre-operation type sprinkler fire extinguishing equipment having the above-mentioned constitution, a pressure switch is provided in the secondary side pipe, and the pressure switch detects a pressure decrease in the secondary side pipe to detect the sprinkler. A head operation signal may be output.

[0048]

As described above, according to the present invention, the equipment and structure of the pre-operation type sprinkler fire extinguishing facility can be simplified, and the cost for introducing the facility, checking and servicing can be reduced.

[Brief description of drawings]

FIG. 1 is a system diagram of a pre-operation type sprinkler fire extinguishing facility of the present invention.

FIG. 2 is a cross-sectional view of a running water detection device used in the fire extinguishing facility of FIG.

FIG. 3 is a sectional view of a flange portion.

[Fig. 4] State of the water flow detection device when the sprinkler head malfunctions

FIG. 5 is a system diagram of a pre-operation type sprinkler fire extinguishing system using a sensing head.

[Explanation of symbols]

A water flow detector C control device H sprinkler head S fire detector W water source 3 Primary side room 4 Secondary side room 5 communication openings 8 valve 15 spindles 32 small holes SW1 limit switch SW2 limit switch

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G08B 17/00 G08B 17/00 J

Claims (6)

[Claims] 1. A partition wall is provided between the primary side and the secondary side, and a communication port is provided in the partition wall, and a control chamber is formed on the communication port surface of the primary side chamber by the upper part of the valve body and the inner wall of the primary side chamber. The primary side chamber is connected to the primary side pipe leading to the water source, the secondary side chamber is connected to the secondary side pipe to which the sprinkler head is connected, the control chamber is normally filled with fluid, and the elastic body springs the spring from above. The communication port is closed by a biased valve body, a running water detection device that allows only a small amount of water to flow, and a fire detector installed near the sprinkler head,
In a pre-actuated sprinkler fire extinguishing facility configured by a control device that inputs an output signal from the water flow detection device and an output signal from the fire detector, and issues an alarm / signal,
A pre-actuated sprinkler fire extinguisher facility, wherein a sprinkler head actuation signal and a valve disc opening signal are output according to the position of the valve rod that is linked to the lift motion of the valve disc of the water flow detection device. 2. A pipe connected to a sensing head is connected to the control chamber of the flowing water detecting apparatus according to claim 1 to fill the fluid.
Pre-operation type sprinkler fire extinguishing equipment, which comprises a flowing water detection device for opening the valve body by opening the sensing head, and a control device for inputting an output signal from the flowing water detection device and issuing an alarm / signal. . 3. A flange-shaped elastic body having a trumpet shape, which is larger than an outer diameter of a valve seat contact surface of the valve body and spreads downwardly, is installed on the bottom surface of the valve body of the flowing water detection device according to claim 1 or 2. A flowing water detection device, which is fixed, and has a small hole or a narrow groove through which water can pass on the primary side and the secondary side of the elastic body. 4. The running water detection device according to claim 3, further comprising a valve rod which is installed and fixed to the valve body and has a tip protruding outside the running water detection device, and displacement detection near the valve rod projection of the running water detection device. A water flow detector with a switch installed. 5. The running water detecting device according to claim 4, wherein the displacement detecting switch is provided with a delay function. 6. The pre-actuated sprinkler fire extinguishing equipment according to claim 1, wherein the sprinkler head actuation signal is output by detecting a pressure decrease in the secondary side pipe. Fire extinguishing equipment.