JP2603563Y2 - Sprinkler piping connection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for connecting a main pipe such as a water supply to a sprinkler pipe.

[0002]

2. Description of the Related Art (1) A system that uses a solenoid valve and a drain plug to replace air in a sprinkler pipe by draining water every day, detects a fire, and opens the solenoid valve by an electric signal is used. However, the reliability of this system is low due to a power failure in the event of a fire. (2) A system was used in which air was replaced by compressed gas (air), and the main valve was opened by pressure changes due to the operation of the sprinkler head and the like. However, this system requires large-scale equipment such as a pressurizing device. (3) Due to the loop piping, tap water always flowing to the sprinkler was used. However, reciprocating piping was required, which increased the cost, and required measures against dew condensation.

[0003]

[Problems to be Solved by the Invention] The present invention always fills the sprinkler head piping with water and can respond quickly to a fire without being affected by a power outage in the event of a fire. An object of the present invention is to obtain a device that performs a sprinkler operation.

[0004]

In order to achieve the above object, the present invention connects a main pipe and a sprinkler pipe by a valve box, and provides a partition having a water passage hole inside the valve box, and connects the main pipe and the sprinkler pipe with the partition. A main pipe normally closed valve is provided inside the space at one end of a sliding spindle that penetrates the partition wall and is energized by the main spline, and is slidable with respect to the spindle. A normally closed valve for water passage is provided outside the space, a normally closed valve for water passage is interposed between the normally closed valve for water passage and the spindle, and a normally closed valve for taking in air into the space. It is constituted by a sprinkler pipe connection device provided with a drain valve and provided with an opening device for the main pipe normally closed valve.

[0005]

In the present invention, a water pipe is connected to the main pipe to fill or circulate tap water. Then, by operating the opening device provided in the main pipe and sliding the main pipe normally closed valve to the left in FIG. 1 against the main spring to open the valve, the space is filled with tap water and the water pressure is simultaneously increased. The water hole normally closed valve opens against the water hole normally closed spout, and the tap water in the space flows into the pipe from the water hole and reaches the sprinkler head, and the pipe is filled with the tap water. In this state, the main pipe, the space, and the pipe communicate with each other, and the water pressure of the tap water is applied to the sprinkler head.

Accordingly, when the opening device is operated and removed from the normally closed valve of the main pipe, the spindle slides to the right in FIG. With the force of the closing striation, the water hole is closed by the normally closed valve, and the tap water in the space is sealed.

[0007] In this state, when the normally closed drain valve for air intake is opened, the tap water in the space is discharged from the valve port to the outside, and the outside air enters the space instead. Instead, the space is filled with air, and the tap water in the pipe and the tap water in the main pipe are shut off by the air in the space. When air enters the space, the water pressure in the sprinkler pipe is equal to the water pressure in the main pipe.Therefore, the main pipe normally closed valve has a larger pressure applied area on the sprinkler pipe side than the area of the main pipe normally closed valve. The closing force increases. Further, the water hole normally closed valve increases the closing force of the valve due to the pressure difference between the pressure in the sprinkler pipe and the atmospheric pressure in the space.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sprinkler pipe 2 for a relatively small building or home is installed above the ceiling and connected to the main pipe 1 of tap water. This connection is made by a valve box 3 having a main pipe normally closed valve 8 and a water hole normally closed valve 9 built therein.

The valve box 3 has a partition wall 5 having a water hole 4 therein, and a space S is interposed between the partition wall 5 and the side surface of the main pipe 1. The main pipe normally closed valve 8 is connected to the side opening 14 of the main pipe 1.
The normally closed valve 9 is in contact with a valve seat 8 ′ protruding toward the space S on the outer periphery of the water hole 4, and is in contact with a valve seat 9 ′ protruding outside the space S on the outer periphery of the water hole 4. The normally closed valve 8 is integrally provided at one end of a sliding spindle 7 that penetrates the partition 5, a main spring 6 is interposed between the valve 8 and the partition 5, and the main spring 6 is normally closed by the main spring 6. 8 is pressed against the valve seat 8 'in a normally closed state.

The normally closed valve 9 is slidably supported by the spindle 7 at the center thereof, and the normally closed valve 10 is screwed to a support fitting 15 screwed to the other end of the spindle 7. The water-flow hole normally closed valve 9 is pressed against the valve seat 9 ′ by the force of the ridge 10 to maintain the water-flow hole 4 in a normally closed state. The force due to the main spring 6 is greater than the force due to the normally closed spout 10.

A cylindrical projection 15 'is provided at the center of the outer surface of the support fitting 15, and is slidably fitted in a cylindrical guide 3 "provided on an end plate 3' of the valve box 3, and formed on the inner surface. The outer cylindrical portion 9 ″ of the normally closed valve 9 for water passage is slidably fitted into the cylindrical inner peripheral guide 15 ″ through the watertight packing 16.

A base of a cylindrical body 17 provided with a water passage window is screwed to the outer periphery of the support fitting 15, and a hook portion at the tip of the cylindrical body 17 to the outer peripheral edge of the water hole normally closed valve 9. 17 'is formed.

On the lower side plate of the space S, a normally closed drain valve 11 for displacing water and air is pressed against a tapered valve seat formed at a valve port 18 by a small spring 19 to hold the normally closed state.
By pushing the drain valve 11 upward from below with a gripping rod, the filled water in the space S is drained from the valve port 18, and at the same time, external air enters the space S from the valve port 18. .

The force for closing the valve when water in the space S is replaced with air is (force for closing the main pipe normally closed valve 8) = (pressure of the sprinkler pipe 2) × (area of the water stop packing 16) + ( (Compression force of main sprout 6)-(Pressure of main pipe 1) x (Area of main pipe normally closed valve 8)-(Compression force of water hole normally closed sprout 10) (Power to close water hole normally closed valve 9) ) = (Pressure of sprinkler pipe 2) × {(area of water hole normally closed valve 9) − (area of water stop packing 16)} + (compressive force of water hole normally closed sprung 10) Is the slidable water rod 1 facing the side opening 14
2 'is provided on the side plate of the main pipe 1, and the rod 12' can be pushed to open the main pipe normally closed valve 8 manually against the force of the main sprocket 6, thereby opening the valve 8. Is formed. The opening device 12 can also be operated by a command signal from the controller 22 based on signals a and b from the indoor fire sensor 20 or the sprinkler head operation sensor 21.

After a long period of time, the pressure of the sprinkler pipe 2 drops, the valves 8 and 9 open, and the main pipe 1 enters the space S from the main intake 1 by electrically operating the normally-intake air intake valve 11 for air intake. After the water flows and the pressure increases, the water in the space S can be automatically drained again.

In the drawing, reference numeral 22 denotes a throttle hole, 23 denotes an operation signal switch, and 24 denotes an outlet of the valve box 3 which is connected to the sprinkler pipe 2. In FIG. 2, 25 is a normally open valve, and 26 is an air chamber.

[0017]

[Effect of the Invention] Since the present invention is constructed as described above, the sprinkler head operates in the event of a fire, and when water in the sprinkler pipe is sprinkled, the pressure in the sprinkler pipe decreases and the pressure difference between the main pipe and the main pipe causes the normal operation. The valve closes and the tap water fills the space.The water hole is normally closed and the water hole is opened to open the water hole normally closed valve to connect the sprinkler piping and the main pipe, and the tap water reaches the sprinkler head, causing a fire. There is an effect that a simple device that can continue watering from the head despite the power failure can be provided, and the air in the space, between the tap water of the main pipe and the stagnant water or the contaminated water in the sprinkler pipe at normal time, is provided. It is sanitary without mixing, and by separating the water hole normally closed valve and the main pipe normally closed valve so that power is not transmitted, the impact pressure due to the water hammer in the main pipe reduces the static water in the sprinkler pipe. Achieved not one in which rich in safety.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a sprinkler head piping connection device of the present invention.

FIG. 2 is a perspective view of a main pipe and a sprinkler pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main pipe 2 Sprinkler piping 3 Valve box 4 Water hole 5 Partition wall S space 6 Main spring 7 Sliding spindle 8 Main pipe normally closed valve 9 Water hole normally closed valve 10 Water hole normally closed spring 11 Normally closed for air intake Drain valve 12 opening device

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-219585 (JP, A) JP-A-5-253316 (JP, A) Japanese Utility Model Showa 50-140294 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) A62C 35/58-35/68

Claims (1)

(57) [Scope of request for utility model registration] 1. A main pipe and a sprinkler pipe are connected by a valve box, a partition having a water passage hole is provided inside the valve box, a space is interposed between the partition and the main pipe, and the partition is formed. A main pipe normally closed valve is provided at one end of a sliding spindle that penetrates and is energized by a main spring inside the space, and a water hole normally closed valve slidable with respect to the spindle is provided outside the space. A normally closed drainage valve is interposed between the normally closed valve and the spindle, and a normally closed drainage valve for taking in air into the space is provided. A sprinkler piping connection device provided with a valve closing opening device.