JPS588255B2 - sprinkler system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sprinkler system equipped with an electric shock prevention device when the sprinkler is activated.

Traditionally, sprinklers are installed below lighting lights, etc.
Electrical equipment that could cause an electric shock should not be installed in the area where water is sprayed.

However, in recent years, in order to streamline office work, computers, copying machines, etc. have been installed, and many of these machines require a 200V power supply.

Furthermore, these are equipped with louvers etc. for heat dissipation.
Not sealed like submersible pumps.

Similarly, electrical outlets installed on walls and the like are not designed to be water-resistant, and it is difficult to do so.

Therefore, if conventional sprinklers are used in such places, there is a risk of electric shock due to electric leakage, making them virtually impossible to use.

As a countermeasure against this, there is a method of inserting a tree breaker in the power supply, but due to the leakage force, it will not operate if the current flows through the human body or returns through the normal circuit, and there is a possibility of electric shock to the person through such a route. Of course it also exists.

Furthermore, even if the playing force is activated by the electric current that passes through a person and is grounded, there is a time delay until the playing force is activated, and there is no guarantee that the person will be able to withstand all the current flowing during that time. Even if the heat from the fire
There is no guarantee that firefighting and evacuation activities will not have adverse effects in response to adverse environments such as smoke.

Therefore, an oven loop that detects electric shock is uncertain, and it is necessary to first turn off the power and then start water supply as a closed loop.

The probability of a fire occurring is low, and due to water penetration during a fire,
Not all cases are subject to electric shock.

However, it is well known that death can easily occur if a voltage of 100V or more is applied to a person through water, and if an accident should occur, the consequences would be grave.

In addition, if there is such a danger, even if a small fire breaks out, you will not be able to safely extinguish the fire, and you will be forced to concentrate on evacuating before the sprinklers are activated, which could unnecessarily cause more damage. There is a possibility that it will.

The present invention has been made in view of the above points, and can prevent electric shock accidents, which are secondary disasters caused by water spraying, eliminate the danger to human life, and fully utilize the functions of conventional sprinklers. An object of the present invention is to provide a sprinkler system equipped with an electric shock prevention device that can prevent electric shock accidents.

An embodiment of a sprinkler device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an outline of the configuration of a sprinkler device according to the present invention.

In FIG. 1, reference numeral 1 denotes a room in which a sprinkler system is installed.In the room 1, a required number of water faucets 2 having known fusible taps are installed. Electrical appliances 3 such as emergency lights are installed, and electrical equipment 4 such as a copying machine and a computer is connected to an outlet 5 provided on a wall or the like within the water sprinkling area.

The pressurized water source tank 6 of the sprinkler is equipped with a manual or automatic valve 7, directly or remotely controlled, in order to prevent unnecessary water discharge after the fire has been extinguished. A valve 8 is installed, and the automatic valve 8
A circuit breaker having a contact point 10 is connected to the automatic valve 8 via a link device 9, and a relief valve 11, which is normally closed, is installed in parallel with the automatic valve 8 to prevent operation during maintenance. It is arranged.

On the other hand, a pressure gauge 13 is provided at the end of the sprinkler water supply pipe 12.

The outlet 5 has contacts 15, 1 of the electromagnetic relay 14.
6, it is connected to a power source 17.

The electromagnetic relay control power supply 18 is provided with a normally used push button 19 for turning on the electromagnetic relay 14 and a normally closed push button 20 for opening the electromagnetic relay 14.
A contact 21 for self-holding is connected in parallel with.

Also, one end of the push button 19 and the contact 21 is connected to a solenoid 22.
is connected to one end of the solenoid 22, and the other end of the solenoid 22 is the contact 1
0 to the pushbutton 20.

In the figure, the push button 19 is pressed to energize the solenoid 22, the contact 21 is closed and the electromagnetic relay 14 is self-holding, the contacts 15 and 16 are closed, and the power source 17 is connected to the outlet 5.
The electrical equipment 4 installed in the water-permeable area of the sprinkler is shown to be in an operable state.

FIG. 2 shows the internal structure of section A, which is surrounded by a two-dot chain line in FIG. The details of the internal structure of the valve 8 are shown.

One end of the link device 9 is connected to the operating lever 23 of the circuit breaker B.
The other end of the link device 9 is pivotally connected to the operating arm 25 of the automatic valve 8 by a pin 26 .

Further, the link device 9 is configured such that its length can be adjusted by a bolt portion 27, a nut portion 28, and a lock nut 29.

The opening 30 of the automatic valve 8 is connected to the sprinkler pressurized water source tank 6 side piping, the opening 31 is connected to the water tap side piping, and the movable valve 32 partitions the opening 30.31, and the valve body 33 is connected by its own weight. It is in contact with the valve seat portion 34.

Further, the movable valve 32 may be pressed downward by a spring 35 if necessary.

The movable valve 32 is capable of sliding on the inner surface of a packing 36 provided on the inner surface of the valve body 33, and the outer metal crown 37 of the packing 36 is lightly press-fitted into the inner diameter portion 38 of the valve body 33 and fixed by a circlip 39. The inner diameter lip 40 of the packing 36 is in pressure contact with the outer periphery 41 of the movable valve 32 to maintain airtightness.

The inner surface of the inner diameter lip 40 is coated with fluororesin, and the movable valve 32 has a small hole 42 formed therein. The difference in volume due to the temperature change of air bubbles mixed into the opening 3 due to a slight leakage of water from the straddle opening 31.
The pressure difference between the openings 30 and 31 is at least enough to prevent the generation of a pressure difference of 0.31 mm, and at most enough to push up the movable valve 32 when one microfaucet 2 is operated. ing.

A shaft 44 is connected to the movable valve 32 by a threaded portion 43, and both ends of the shaft 44 are slidably supported by bearings 45, 46. coupled to the ring 48Vi
, is fitted into the recess 49 of the bulb body 33.

On the other hand, the bearing 46 is supported by several radially arranged bridges 50 integral with the valve body 33.

Further, a rod 51 extending in a direction perpendicular to the axis of the bearing 46 is slidably inserted into a hole 52 formed in the bearing 46, and a hole 54 formed in the rod 51 has a rod 51 extending in a direction perpendicular to the axis thereof. The lower part 53 is removable.

By the way, the rod 51 is slidably penetrated by a push 55 press-fitted into the side wall of the valve body 33, and a flange 56 provided at the outer end of the rod 51 has a flange 56 concentric with the push 55. One end of a bellows 57 disposed in the housing is airtightly attached by means such as brazing.

A ring 58 is brazed to the other end of the bellows 57, and an O-ring 59 is interposed between the ring 58 and the valve body 33 to maintain airtightness. It is press-fitted to the valve body 33 by a threaded cylindrical bolt 60.

The push 55 also has a hole 61 penetrating inside and outside.
The inside of the bellows 57 is communicated with the opening 30 of the valve body 33 through the hole 61 and an annular gap between the pusher 55 and the rod 51.

On the other hand, an air chamber 63 that accommodates the bellows 51 and the like and is sealed by a lid 63 is formed on the outside of the valve body 33. An arm 65 whose base end is fixed to a freely movably supported shaft 64 and whose distal end is slightly spaced apart from the flange 56 is disposed, and the link device 9 is attached to the shaft 64 outside the air chamber 63. The base end portion of the pivotally mounted actuating arm 25 is fixed.

Further, an electrode 66 is provided on the bottom wall of the air chamber 63 to detect water leakage due to breakage of the bellows 57, and a manual return lever 66 is provided at the tip of the operating arm 25.
7 is provided.

Therefore, water pressure from the sprinkler tank 6 is applied to the bellows 57 under normal conditions, and therefore the rod 51
In the figure, a force is applied to the left, but the rod 5
Since the lower part 53 of the shaft 44 is engaged with the hole 54 at the right end of the circuit breaker B, the iron 51 remains in the position shown in the figure, and the operating lever 23 of circuit breaker B is set to the left. , circuit breaker B is closed.

Therefore, if even one spout 2 opens, water is an incompressible fluid, so first open the opening 31 before spraying water in earnest.
As the water pressure on the side temporarily decreases, the movable valve 32 immediately closes.
moves upward, and the lower part 53 of the shaft 44 comes out of the hole 54,
The rod 51 moves to the left due to water pressure, and the arm 65,
The actuating lever 23 swings counterclockwise via the shaft 64, the actuating arm 25 and the connecting linkage 9, as shown in FIG.

Therefore, the circuit breaker contact 10 in FIG. 1 is opened, and therefore the contacts 15 and 16 of the electromagnetic relay are opened, power transmission to the outlet 5 is stopped, and the power cannot be turned on even if the back button switch 19 is pressed.

Further, in the state shown in FIG. 2, the movable valve 32 is pushed up enough to ensure a flow path with a substantially uniform area in the opening 30.31.

After the sprinkler operation is completed, the movable valve 32 will fall when the unnecessary water discharge prevention valve 7 shown in FIG. 1 is closed or the sprinkler valve 2 is closed, so the return lever 67 must be manually moved from the position shown in FIG. 3. By moving it to the left, it can be returned to its original position as shown in FIG.

Next, FIGS. 4 and 5 show other embodiments in the area A surrounded by the two-dot chain line in FIG. However, this example is suitable for a larger number of cases.

The same parts as those in FIG. 2 of the embodiment are designated by the same reference numerals, and the explanation thereof will be omitted.

In FIG. 4, the lower end of the movable valve 32 is connected to the valve body 33.
The movable valve 32 is rotatably supported by a shaft 69 connected to the movable valve 32, and the upper end of the movable valve 32 is fixed at the position shown in FIG.

A hole T2 is bored in the center of the movable valve 32, and a sealing plate 73 is welded to the right end of the hole T2.

On the other hand, the outer wall of the valve body 33 includes a first cylinder 74 having a relatively large inner diameter;
A second cylinder 75 having a smaller inner diameter and a built-in air chamber 63 such as the arm 65 are formed integrally with the valve body 33 on the same axis.

The outer end of the first cylinder 74 is sealed by an end plug 16, and a step 74a is formed at the other end of the first cylinder 14, and the step 74a is provided with a step 74a. a sealing plate 77 that prevents communication between the second cylinder 75 and the second cylinder 75;
A ring 78 welded to the outer peripheral portion of the first cylinder 74 is brought into contact with the ring 78, and the link 78 is press-fitted to the step portion 74a by a retaining ring 79 screwed onto the inner wall of the first cylinder 74.

Incidentally, a free piston 80 is slidably inserted into the first cylinder 74, and the free piston 80 is pushed against the end plug 76 by a spring 81 interposed between the ring 78 and the free piston 80. In this case, the top end of the bottle 71 is in contact with the large diameter part of the free piston 80, preventing it from rising and holding the movable valve 32 in the position shown.

The free piston 80 is equipped with a pipe 82 that protrudes toward the sealing plate 77 and has an acute-angled tip, and a porous material 83 filled portion is provided on the back side (end plug side) of the free piston 80. The pipe 82 and the inside of the pipe 82 are communicated through a small hole 84, and the front and rear of the free piston 80 are communicated through the pipe 82, the small hole 84, and the porous material 83.

Further, the outer wall of the valve body 33 has an opening 30 and a piston rear chamber 85 at the front and rear of the movable valve 32, respectively.
, and communication holes 87 and 88 that communicate the opening 31 and the piston front chamber 86 are formed.

On the other hand, a free piston 89 whose tip protrudes into the air chamber 63 is slidably inserted into the second cylinder 75, and the free piston 89 is attached to the outer periphery of the rear end of the free piston 89. When the second cylinder protrudes to the side of the air chamber 63 by a predetermined amount. An O-ring 90 is attached to the inner surface of the end wall of the free piston 89 to prevent the fluid in the cylinder 75 from flowing out to the air chamber 63 side. axis 64
The tips of the arms 65 connected through the two are brought into contact with each other.

When the water faucet 2 is opened as in the first embodiment, the pressure in the piston front chamber 86 connected to the opening 31 is increased by the resistance of the porous material 83 and the small hole 84 to the piston rear chamber 85 on the right side of the free piston 80. Since the free piston 80 moves to the left in the figure against the preload force of the spring 81, the sharp end of the pipe 82, which is integral with the free piston 80, is sealed. After breaking the plate 77, the free piston 89 is further pushed to rotate the arm 65 clockwise, and thereafter the power is cut off using the same route as in the first embodiment.

Next, as shown in FIG. 5, the arm 65 rotates until it contacts the upper outer circumference of the free piston 89, so that even after the circuit breaker B is opened, the free piston 89 remains on the arm 65.
The second O-ring 90 moves to the left without any rotation.
It comes into contact with a tapered part formed at the end of the cylinder 75 and stops.

At this time, water pressure is applied inside the second cylinder 75 from the damaged part of the sealing plate 77, so water pressure is applied to the rear end of the free piston 89. This force compresses the O-ring 90, and the water inside the second cylinder 75 is will not leak to the air chamber 63 side.

Further, after the arm 65 reaches the power cutoff position as described above, the free piston 80 further moves to the left and reaches the position shown in FIG. The movable valve 32, which is energized counterclockwise about the shaft 69 by the water pressure on the opening 30 side, moves the bottle 71 through the concave part 10.
is pushed upward, the movable valve 32 rotates counterclockwise around the shaft 69, moves to an approximately horizontal position as shown in FIG. 5, and begins full-scale water supply from the opening 30 to the opening 31. is started.

In normal operation as described above, opening 30. 3
Before the pressure difference between 1 and 1 approaches the water source pressure, the free piston 80 moves to the position where the movable valve 32 is free, as shown in FIG. 5, so the sealing plate 73 maintains its original shape. However, if the movement of the free piston 80 is incomplete due to a failure K, the pressure difference between the openings 30 and 31 becomes large, and the sealing plate 73 ruptures.

Therefore, the water pressure on the opening 31 side increases and
Since the pressure is almost the same as on the 0 side, there is almost no force pushing the free piston 80 forward, and the free piston 80 is pushed back backward by the preload force of the return spring 81.
If the sealing plate 86 is even slightly damaged by then, water will enter the second cylinder 75 from there, and the free piston 89 will move forward due to the water pressure, and the circuit breaker B will open.

Since the present invention is configured as described above, it detects the initial small amount of water released when the water faucet is opened, immediately turns off the power in areas where there is a possibility of electric shock, and then immediately opens the water supply valve to begin full-scale water supply. By doing so, it is possible to prevent the occurrence of electric shock accidents, which are secondary disasters caused by water spraying, and the functions of conventional sprinklers can be fully demonstrated.

[Brief explanation of drawings]

FIG. 1 is a schematic system diagram of a sprinkler system according to the present invention, FIGS. 2 and 3 are structural diagrams of main parts according to one embodiment of the present invention, and FIGS. 4 and 5 are according to other embodiments of the present invention. It is a main part structure diagram. 2... Water faucet, 4... Electrical equipment, 5... Outlet, 6... Pressurized water source tank, 1... Unnecessary water discharge prevention valve, 8... Automatic valve, 9... Link device ,10,15,
16, 21... Contact, 22... Solenoid, 23.
... Actuation lever, 25... Actuation arm, 30. 31
... Opening, 32... Movable valve, 33... Valve body, 34... Buddha seat, 51... Rod, 56...
Flange, 57... Bellows, 63... Air chamber, 6
4...Arm, 61...Manual return lever, 13...
- Sealing plate, 74... first cylinder, 75... second cylinder, 80, 89... free piston.

Claims (1)

[Scope of Claims] 1. A sprinkler system having a water faucet for an indoor space in which an electric device and a power supply device for the electric device are installed, provided in a water pipe connecting the water faucet and a pressurized water source, When the water pressure on the water faucet side drops below a certain value compared to the pressure on the water source side. A movable valve that opens automatically;
4 disconnectors that are normally on and installed in the power circuit for the electrical equipment or power supply device, etc., and a movable switch that is operated by pressure water on the pressurized water source side in response to a drop in water pressure on the water faucet side. A sprinkler system comprising: a member; and a circuit breaker opening operating device that disconnects the circuit breaker by moving the movable member. 2. The circuit breaker release actuation device is characterized by being unlocked by movement of the movable valve in the slight opening direction and consisting of a bellows operated by pressure water on the water source side, and a lever and linkage device etc. driven by the bellows. , a sprinkler device according to claim 1. 3 The circuit breaker release device is characterized in that it consists of a free piston that operates when the differential pressure across the movable valve exceeds a certain value, and a lever and linkage device that are operated by the free piston. A sprinkler device according to claim 1. 4 The movable valve is unlocked by the movement of the free piston,
It is characterized by being opened by water pressure. A sprinkler device according to claim 3.