JPH0737217U - Sprinkler pipe connection device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a sprinkler pipe connection device that can supply tap water to the sprinkler head 13 in a sanitary, safe, and swift manner without being affected by a power failure at the time of fire. The purpose is to get. [Structure] A main pipe 1 and a sprinkler pipe 2 are connected by a valve box 3, and a partition wall 5 having a water passage hole 4 is provided inside the valve box 3 to provide a space S between the partition wall 5 and the main pipe 1. A main valve normally closed valve 8 is provided inside the space S at one end of a sliding spindle 7 which penetrates the partition wall 5 and is energized by a main spring 6 so as to be slidable with respect to the spindle 7. The water passage normally closed valve 9 is provided outside the space S, and the water passage normally closed valve 10 is interposed between the water passage normally closed valve 9 and the spindle 7.
In addition, a normally closed drainage valve 11 for intake of air into the space S is provided, and an opening device 12 for the main normally closed valve 8 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection device between a main pipe of water and the like and a sprinkler pipe.

[0002]

[Prior art]

 (1) A system was used in which a solenoid valve and a water drain plug were used, and the interior of the sprinkler pipe was replaced with air by draining water, a fire was detected, and the solenoid valve was opened by an electrical signal. However, this system is unreliable due to power failure during a fire. (2) A system was used in which air was replaced by compressed gas (air) and the main valve opened due to pressure changes due to the operation of the sprinkler head. However, this system requires large-scale equipment such as a pressure device. (3) The tap water was always flowing to the sprinkler due to the loop piping. However, reciprocating piping was required, which resulted in high cost and required measures against condensation.

[0003]

[Problems to be solved by the device]

 The idea is to have a device that can fill a sprinkler head pipe at all times and can respond quickly to a fire without being affected by a power failure at the time of fire, and can perform a safe and reliable sprinkler operation with a simple facility using tap water. To aim.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention connects a main pipe and a sprinkler pipe by a valve box, provides a partition wall having a water passage inside the valve box, and interposes a space between the partition wall and the main tube. A main valve normally closed valve is provided inside one of the above spaces at one end of a sliding spindle that penetrates through the partition wall and is energized by the main spring, and a water passage hole normally closed valve that is slidable with respect to the spindle is provided. A normally-closed drain valve for air intake into the space, which is provided outside the space, has a normally-closed water-through hole interposed between the water-hole normally closed valve and the spindle, and In addition, it is composed of a sprinkler pipe connecting device provided with an opening device for the main normally closed valve.

[0005]

[Action]

 In this plan, a water pipe is connected to the main pipe to fill or distribute tap water. When the opening device provided in the main pipe is operated and the main normally closed valve is slid to the left in Fig. 1 against the main spring to open the valve, the space is filled with tap water and at the same time the water pressure increases. The normally closed valve of the water passage hole is opened against the normally closed ridge of the water passage hole, and the tap water in the space flows into the pipe through the water passage hole to reach the sprinkler head, and the pipe is filled with the tap water. In this state, the main pipe, space, and pipe are connected, and the water pressure of tap water is applied to the sprinkler head.

Therefore, when the opening device is operated and removed from the main normally closed valve, the spindle slides to the right in FIG. 1 due to the force of the main spring to close the valve and at the same time the water passage hole and water passage hole. With the force of the normally closed spring, the water hole is closed by the normally closed valve, and the tap water in the space is sealed.

When the normally closed drainage valve for air intake is opened in that state, tap water in the space is discharged to the outside from the valve opening, and instead, outside air enters the space, and the tap water and the air are separated from each other. 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 piping is equal to the water pressure in the main pipe.Therefore, the main normally closed valve has a larger area on the sprinkler piping side than the area of the main normally closed valve. The power to close is increased. Further, in the normally closed valve for water passage, the force for closing the valve increases due to the pressure difference between the pressure in the sprinkler pipe and the atmospheric pressure in the space.

[0008]

【Example】

 A sprinkler pipe 2 for a relatively small building or home is installed in the ceiling and connected to the main pipe 1 of tap water. This connection is made by a valve box 3 containing a main valve normally closed valve 8 and a water passage normally closed valve 9.

Inside the valve casing 3, there is a partition wall 5 having a water passage hole 4, and a space S is interposed between the partition wall 5 and the side surface of the main pipe 1. The main valve normally closed valve 8 is in contact with a valve seat 8 ′ projecting toward the space S on the outer periphery of the side opening 14 of the main pipe 1, and the water passage hole normally closed valve 9 is provided on the outer periphery of the water passage hole 4. A main valve normally closed valve 8 is provided integrally with one end of a sliding spindle 7 penetrating the partition wall 5 and is in contact with a valve seat 9 ′ protruding outside the space S, and between the valve 8 and the partition wall 5. The main spring 6 is interposed, and the main normally closed valve 8 is brought into pressure contact with the valve seat 8 ′ in a normally closed state by the main spring 6.

The water passage hole normally closed valve 9 is slidably supported by the spindle 7 at its central portion, and the water passage normally closed valve is formed between the water passage hole normally closed valve 9 and a support fitting 15 screwed to the other end of the spindle 7. 10, the water passage hole normally closed valve 9 is pressed against the valve seat 9 ′ by the force of the spring 10 to keep the water passage hole 4 in the normally closed state. The force generated by the main spring 6 should be greater than the force generated by the normally-closed water flow hole 10.

A cylindrical projection 15 ′ is provided at the center of the outer surface of the support member 15, and is slidably fitted into a cylindrical guide 3 ″ provided on the end plate 3 ′ of the valve box 3 to form an inner surface. The outer cylindrical portion 9 ″ of the water passage hole normally closed valve 9 is slidably fitted into the formed cylindrical inner peripheral guide 15 ″ through the water blocking packing 16.

A base of a tubular body 17 having a water passage window is screwed onto the outer periphery of the support fitting 15, and a hook portion to the outer peripheral edge of the water through hole normally closed valve 9 is attached to the tip of the tubular body 17. To form 17 '.

On the lower side plate of the space S, a normally-closed drain valve 11 for replacing water with air is pressed against a taper valve seat formed at the valve port 18 by a small bar 19 to maintain the normally-closed state. By pushing the drainage valve 11 from below to above 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. ing.

The force to close the valve when the water in the space S is replaced with air is (the force to close the main normally closed valve 8) = (pressure of the sprinkler pipe 2) × (area of the water blocking packing 16) + ( Compressive force of main spring 6)-(Pressure of main pipe 1) x (Area of normally closed valve 8 of main pipe)-(Compressive force of normally closed spring 10 of water passage) (Force of closing normally closed valve 9 of water passage) ) = (Pressure of sprinkler pipe 2) × {(area of water passage hole normally closed valve 9) − (area of water shut packing 16)} + (compression force of water passage hole normally closed spring 10) Is provided on the side plate of the main pipe 1 with a slidable water passage rod 12 'facing the side opening 14, and the main pipe normally closed valve 8 is manually pushed against the force of the main spring 6 by pushing the rod 12'. The valve 8 can be opened, thereby forming the opening device 12. 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 motion detection sensor 21.

By electrically operating the normally closed drainage valve 11 for intake of air, the pressure of the sprinkler pipe 2 is reduced over a long period of time, the valves 8 and 9 are opened, and the space S After the water flows and the pressure rises, the water in the space S can be automatically drained again.

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

[0017]

[Effect of device]

 Since this plan is configured as described above, the sprinkler head operates during a fire, and when water in the sprinkler pipe is sprinkled, the pressure in the sprinkler pipe drops and the main valve normally closed valve due to the pressure difference with the main pipe. Open and the tap water fills the space, and presses the water hole normally closed valve to open the water hole normally closed valve to connect the sprinkler pipe and the main pipe to bring the tap water to the sprinkler head and cause a fire. It has the effect of providing a simple device that can continue sprinkling water from the head in spite of a power outage, and because of the air in the space, the tap water of the main pipe and stagnant water or spoiled water in the sprinkler pipes are usually maintained. It is hygienic without mixing, and the impact pressure by the water hammer in the main pipe is transmitted to the still water in the sprinkler pipe by making the normally closed valve of the water passage hole and the main valve normally closed so as not to transmit the force. Without Are those rich in all the sex.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a sprinkler head pipe connecting device of the present invention.

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

[Explanation of symbols]

 1 main pipe 2 sprinkler pipe 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 air intake normally closed Drain valve 12 opening device

Claims (1)

[Scope of utility model registration request] 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, and a space is interposed between the partition and the main pipe. A main valve normally closed valve is provided at one end of the sliding spindle that penetrates and is energized by the main spring inside the space, and a water passage hole normally closed valve that is slidable with respect to the spindle is provided outside the space. A normally closed drainage valve between the water passage hole and the spindle, and a normally closed drainage valve for introducing air into the space, and Sprinkler piping connection device provided with a valve opening device.