JP2533372Y2 - Alarm device for sprinkler - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device for a sprinkler which can use tap water as a water supply source of the sprinkler and also informs of a leak in a pipeline or a fire.

[0002]

2. Description of the Related Art It has been recognized that sprinklers are extremely effective as a means for preventing fires from occurring in various buildings.

However, installation of sprinklers is limited to large buildings required by the Fire Service Law, and is not widely used in ordinary houses or small and medium buildings.

[0004] The reason for this is that a dedicated pressurized water supply source must be installed for supplying water to the sprinkler, which requires a large amount of equipment cost, making it difficult to spread the system.

[0005] Therefore, attention is paid to drinking tap water as the most easily available pressure water, and tap water is used as a water supply source for sprinklers, thereby facilitating installation of sprinklers in ordinary houses and small and medium-sized buildings. Has been considered in recent years.

[0006]

[Problems to be Solved by the Invention] When a water supply pipe for a sprinkler is branched and connected to a water pipe, water does not flow at all in the water pipe, so-called dead water is generated. However, there is a problem that sanitary tap water cannot be used as a pressure water supply source for the sprinkler.

In addition, a check valve is provided upstream of the water supply pipe,
It is conceivable to prevent water from dying into tap water.However, since the static pressure water in the water pipe and the water supply pipe has the same pressure, the check valve does not have the non-return effect. There is a problem that contamination cannot be prevented.

Further, even if the sprinkler is activated due to the occurrence of a fire, if the person is located only at a place away from the fire place, the fire cannot be immediately known.
There is a problem that the response to fire and watering is delayed.

[0009] Therefore, the present invention reliably prevents the contamination of drinking water caused by dead water generated in the water supply pipe for sprinklers,
Tap water can be used as a water supply source for the sprinkler, and the spread of the sprinkler to ordinary houses and small and medium buildings can be realized. An object of the present invention is to provide an alarm device for a sprinkler that can reliably maintain and prevent water pollution.

[0010]

In order to solve the above-mentioned problems, the present invention provides a vertical loop pipe in the middle of a sprinkler water supply pipe branched from a water pipe, and in the middle of the water supply pipe, An on-off valve located upstream and downstream of the loop pipe, and a check valve located upstream of the loop pipe to prevent backflow from the water supply pipe to the water pipe are provided, and transparent upper and lower portions of the loop pipe are provided. The upper and lower ends of a flexible cylindrical chamber are connected, and a magnetic float is housed in this cylindrical chamber so that it can move up and down. The magnetic float is detected at the upper and lower positions outside the cylindrical chamber and an alarm is activated. It employs a configuration with a sensor.

[0011]

[Function] First, open both on-off valves and supply water to the water supply pipe for sprinkler, then close both on-off valves once, fill the loop pipe with high-pressure air while draining water from the loop pipe, and open both on-off valves Thus, the pressure in the sprinkler water supply pipe becomes higher than that in the water pipe, the check valve works effectively, and even if water dies in the water supply pipe, it does not flow out to the water pipe side to contaminate drinking water.

Further, the magnetic float in the cylindrical chamber is at the lower limit position, and when air in the loop pipe leaks and water leaks, the magnetic float floats due to water infiltration into the cylindrical chamber, and the lower sensor is activated. The alarm is activated by detecting the magnetic float to draw attention.

Further, when water is discharged from the sprinkler due to a fire, the check valve opens and water flows from the water pipe to the entire sprinkler water supply pipe, and the water infiltrates into the entire cylindrical chamber. Ascending to the upper part, the upper sensor detects this, and issues a fire alarm.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the first embodiment shown in FIGS. 1 to 4, as shown in FIG. 1, a sprinkler water supply pipe 2 branched from a water pipe 1 has a sprinkler head 3 attached to the end, and a water pipe. A loop pipe 4 is provided at a position close to 1.

The above-mentioned loop pipe 4 is formed in a loop shape in which straight portions 5 and 5 at both ends are parallel to each other at a lower portion so that one pipe stands upright. And the downstream end 2b is connected to the other end.

Drain valves 6 and 6 are attached to the lower end of both ends of the loop pipe 4, and open / close valves 7 and 8 are provided on the upstream and downstream sides of the loop valve 4 of the water supply pipe 2, and further on the upstream side. A check valve 9 that allows the inflow of tap water from the water pipe 1 to the water supply pipe 2 and prevents a backflow is installed at a position closer to the downstream side than the on-off valve 7. A water hammer prevention valve 10 is connected to the upstream side 2 a of the water supply pipe 2 and upstream of the on-off valve 7.

Horizontal pipes 11 and 12 are connected in a branched manner at the upper and lower positions of the loop pipe 4, and the upper and lower ends of a transparent cylindrical chamber 13 arranged vertically in front of the loop pipe 4 are formed. It is connected to the upper and lower parts of the loop pipe 4 via the horizontal pipes 11 and 12.

A magnetic float 14 is provided in a cylindrical chamber 13.
The upper horizontal pipe 11 is connected to a pressure gauge 15 and a three-way switching valve 16 for connection to a compressor or a manual pump.
Thereby, filling and closing of the cylindrical chamber 13 and the water supply pipe 2 with the pressurized air and opening to the atmosphere can be performed.

The magnetic float 14 is made of wood, cork,
A magnetic material 17 such as iron, which is formed using a hollow synthetic resin or the like, and is coated with a warning color in which red and white alternate with each other as shown in FIGS.

The magnetic float 14 is provided with a through hole 18 near the center, floats on the water that has entered the cylindrical chamber 13 and moves up and down smoothly in accordance with the water level. Blades 19 are provided, and the magnetic float 14 is rotated by the vortex of water that has rapidly entered the cylindrical chamber 13, so that visual confirmation can be reliably performed.

Outside the cylindrical chamber 13, non-contact sensors 20 and 21 for detecting the raised magnetic float 14 are provided at lower and upper positions, respectively. Is electrically connected to

Both sensors 20 and 21 are magnetic float 1
A sensor sensitive to the magnetic substance 17 provided on the outer periphery of the sensor 4, for example, a high-frequency oscillation type proximity switch or an optical sensor may be used. When the lower sensor 20 detects the magnetic float 14 that has slightly moved up, the bell 23 of the alarm 22 sounds. , The yellow caution lamp 24 flashes and the upper sensor 21
Detects bell 2 of alarm 22 when magnetic float 14 is detected.
3 and the red lamp 25 blinks. The sensors 20 and 21 operate at a low voltage of, for example, 24V.

The water supply piping device of the present invention has the above-described configuration, and as shown in FIG. 1, a pipe capable of supplying water to the sprinkler head 3 is provided by a water supply pipe 2 branched and connected to a water pipe 1.

In order to set a state in which water can be supplied to the sprinkler head 3, first, the on-off valve 7 on the upstream side is closed, the drain valves 6, 6 and the three-way switching valve 16 are closed, and the on-off valve 8 on the downstream side is opened. Then, if the on-off valve 7 on the upstream side is opened,
Tap water from the water pipe 1 is supplied to the water pipe 2 via the loop pipe 4.
Flows into the entire length of. At this time, tap water also flows into the cylindrical chamber 13.

At this time, although not shown, a test valve provided at an appropriate position such as an end of the water supply pipe 2 is opened to discharge the air in the water supply pipe 2 to the outside.

Next, the two on-off valves 7 and 8 are closed to close the front and rear of the loop pipe 4, and in this state, the three-way switching valve 16 and the front and rear drain valves 6 and 6 are opened, respectively. The water in the chamber 13 is discharged to the outside by the drain valves 6 and 6.

Next, the drain valves 6 and 6 are closed again, and pressurized air is injected into the cylindrical chamber 13 and the loop pipe 4 from a supply source of pressurized air connected to the three-way switching valve 16. Then, the inside of the loop pipe 4 is set to a pressure higher than the water pressure of the water pipe 1, and the three-way switching valve 16 is closed.

Thereafter, when both the on-off valves 7 and 8 are opened, the sprinkler head 3 is set in a water-suppliable set state, and the water in the water supply pipe 2 becomes a static pressure state higher than tap water by the enclosed air pressure. Since the check valve 9 is pressed at a pressure higher than the pressure of the tap water, the water in the water supply pipe 2 does not flow out to the water pipe 1 side, and there is no pollution of drinking water due to dead water.

Further, the magnetic float 14 housed in the cylindrical chamber 13 descends to the lowest part by its own weight, and the sensors 20 and 21 do not operate.

In the above-described set state, the water gradually infiltrates into the cylindrical chamber 13 and the magnetic float 14 slightly rises, because the water leaks into the sprinkler feed pipe 2 or the press-fitted air leaks. Become.

When the magnetic float 14 rises slightly, the lower sensor 20 detects this, and the alarm signal from the output signal from the lower sensor 20 alerts the bell 23 in a short and timely state, and at the same time prompts the caution. The lamp 24 flashes.

In addition, the state of caution is known by visually observing the magnetic float 14 slightly floating in the cylindrical chamber 13, thereby repairing a leaked portion and replenishing the compressed air.

When the sprinkler head 3 detects a fire and sprays water in the above set state, the pressure in the water supply pipe 2 decreases, and when the compressed air in the cylindrical chamber 13 and the loop pipe 4 escapes, the reverse occurs. The stop valve 9 is pushed open by the pressure of the tap water in the water pipe 1, and the tap water is
From the water supply pipe 2 to the sprinkler head 3, and water is continuously sprayed from the sprinkler head 3.

At this time, since tap water flows into the cylindrical chamber 13, the magnetic float 14 suddenly rises to the top.

When tap water is filled in the cylindrical chamber 13, the sprinkler head 3 discharges water due to fire heat, so that pressurized air is also released, and the check valve 9 is opened and the water pipe 1 is opened. This indicates that water has flowed into the sprinkler feed pipe 2.

As described above, the tap water is supplied to the cylindrical chamber 1.
When the magnetic float 14 rises to the upper part, the upper sensor 21 detects this, and the bell 23 of the alarm 22 is sounded urgently, and the red lamp 25 is flashed to notify the occurrence of a fire.

Since the cylindrical chamber 13 is transparent, the raised magnetic float 14 can be seen from the outside, and the water supply for fire can be visually confirmed, and can be recognized even at the time of power failure.

Further, since a vortex is generated in the cylindrical chamber 13 when water is filled, the magnetic float 14 is rotated by the blades 19 on the upper surface, so that when the fire alarm bell of the alarm 22 sounds, it is true or false. Can be immediately determined by looking at the position and rotation of the magnetic float 14.

Next, a second embodiment shown in FIGS. 5 and 6 will be described. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description will not be repeated.

As shown in FIG. 5, in the second embodiment, the sprinkler head is provided with a bypass passage 31 connecting the upstream position of the upstream opening / closing valve 7 and the downstream opening / closing valve 8. 3 so that the water can be discharged when the water supply is confirmed or when the downstream side 2b of the water supply pipe 2 is dead.

As shown in FIG. 6, the downstream opening / closing valve 8 is a valve body 33 housed in a valve box 32 so as to be rotatable.
And a downstream side 2b of the water supply pipe is connected to a pair of opposite ports of a connection port provided at right angles to the valve box 32, and a bypass passage 31 is provided to the remaining pair of ports. Is connected to the end 3 of the bypass passage 31.
1a communicates with the downstream side 2b.

The valve body 33 is rotated by the operation of the handle 35, and the test position where the bypass passage 31 is connected to the distal end portion 31a as shown by the solid line in FIG. 6 and the downstream side 2b as shown by the two-dot chain line in FIG. Can be switched to a water supply set position to which the handle 35 is connected, and a fully closed position in which all of the downstream side 2b and the bypass passage 31 are closed.
Is parallel to the axial direction of the through hole 34, and indicates the flow direction of the water by the length direction of the handle 35, thereby eliminating the occurrence of erroneous switching operation.

If the handle 35 is provided with a lock or a rope seal in the direction of the water supply pipe 2, there is no mistake in supplying water to the sprinkler head 3. The same applies to the on-off valve 7 on the upstream side.

In the second embodiment, warning lights 36 and 37 are attached to the sensors 20 and 21 of the cylindrical chamber 13, and when the sensors 20 and 21 detect the magnetic float 14, the warning lights 36 and 37 are turned on. Visual confirmation is ensured.

The second embodiment of the present invention is configured as described above, and is capable of filling the loop pipe 4 with pressurized air and supplying water to the sprinkler head 3 in which the upper and lower on-off valves 7, 8 are in the open position. In this state, the bypass passage 31 is closed by the on-off valve 8.

In the above state, in order to check the supply of water to the sprinkler head 3 and discharge the water in a dead state, the on-off valve 8 on the downstream side is rotated as shown by the solid line in FIG. Then, if the test valve 38 at the downstream end is opened, tap water flows out through the bypass passage 31, and after the dead water flows out, the test valve 38 is closed, and then the downstream open / close valve 8 is closed. Can be switched to the water supply pipe 2 side, and the water supply can be confirmed and the water can be taken out without the pressure air sealed in the loop pipe 4 flowing out.

In any of the embodiments, the water in the sprinkler circuit has a higher pressure than the tap water due to the pressurized air, and the lock portion of the sprinkler head 3 is pressed at a high pressure. The reaction of the lock portion to heat is quick, and the lock portion is decomposed with a little softening, so that water can be sprayed accurately and promptly.

[0049]

As described above, according to the present invention, a loop pipe is provided on the upstream side of a water supply pipe for a sprinkler branched from a water pipe, and the upper and lower sides of the tubular chamber are connected to the upper and lower sides of the loop pipe. Open / close valves are provided on the upstream and downstream sides of the loop pipe, and a check valve is incorporated on the upstream side.As a result, the loop pipe of the water supply pipe is maintained at a higher pressure than the tap water by air pressure, and dead water generated in the water supply pipe is reduced. Water can be reliably prevented from flowing into the water pipe, so there is no pollution of tap water, tap water can be used as a pressure water supply source for sprinklers, and sprinklers can be installed without requiring a dedicated pressure water supply source And it can be easily spread to ordinary houses and small and medium-sized buildings.

A magnetic float is vertically movably housed in a transparent cylindrical chamber, and sensors for detecting the upward movement of the magnetic float are provided outside and above and below the cylindrical chamber. Since the alarm was activated, the sprinkler water supply pipe and the sprinkler head can be leaked and the sprinkler in the event of a fire can be checked by the fire alarm and flashing of the lamp or the rise of the float when the fire is released. In addition, it can be seen that the leakage of the pressurized air caused the loss of the pressurized air in the circuit and hindered the isolation of the pressurized air from the water and tap water.
The sprinkler circuit can be constantly checked by the two methods of the electric alarm and the visual check, and the emergency situation of the fire can be immediately known.

In the event of a fire, even in an unmanned emergency, the sprinkler is activated and water is released, so that a wide range of persons can be instantly notified.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of a water supply piping device according to the present invention.

FIG. 2 is a perspective view showing a main part of the above.

FIG. 3 is a partially cutaway front view of the magnetic float used in the above.

FIG. 4 is a plan view of the above.

FIG. 5 is a front view showing a second embodiment.

FIG. 6 is a sectional view of the on-off valve used in the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water pipe 2 Water supply pipe 3 Sprinkler head 4 Loop pipe 6 Drain valve 7, 8 On-off valve 9 Check valve 13 Cylindrical chamber 14 Magnetic float 20, 21 Sensor 22 Alarm

Claims (1)

(57) [Scope of request for utility model registration] 1. A vertical loop pipe is provided in the middle of a sprinkler water supply pipe branched from a water pipe, and an on-off valve located upstream and downstream of the loop pipe is provided in the middle of the water supply pipe. A check valve for preventing a backflow from the water supply pipe to the water pipe is provided on the upstream side, and upper and lower ends of a transparent cylindrical chamber are connected to upper and lower parts of the loop pipe; An alarm device for sprinklers that contains a float that can move vertically and that has a sensor that detects a magnetic float and activates an alarm at the upper and lower positions outside the cylindrical chamber.