JP2001259068A - Piping member connection joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler equipment where a sprinkler head can be extended or exchanged in the start of keeping its functions without draining water from the secondary-side piping of the sprinkler equipment. SOLUTION: The piping member connection joint 60a having a swing check valve structure is installed at the secondary-side piping 30 to gradually open and close the closing valve 62 of the piping member connection joint with the inserting degree of a member 42 to be connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting piping members used in sprinkler equipment.

[0002]

2. Description of the Related Art In the event of a fire, a sprinkler operates to sprinkle water and spray water.
The pump starts and water is supplied from the water source to the sprinkler head by piping to extinguish the fire.

[0003] Sprinkler equipment includes wet sprinkler equipment in which water is always filled in a pipe, dry sprinkler equipment in which pressurized air is always filled in a secondary pipe, a fire detector and a sprinkler head. There is a pre-actuated sprinkler system that activates the pump if they operate simultaneously.

[0004] Among them, wet sprinkler equipment is most often used, and FIG. 7 shows a piping diagram of a main part of the wet sprinkler equipment. In FIG. 7, the wet sprinkler equipment (hereinafter abbreviated as sprinkler equipment) includes a main pipe 10,
It comprises an alarm valve 20, a secondary pipe 30, a sprinkler head 40, and a drain valve 50.

The main pipe 10 is connected to an alarm valve 20 installed in each section, and is filled with water from a water source. When the sprinkler head 40 is activated and the pump is activated by the switch 21 attached to the alarm valve, water is pumped from the water source through the main pipe.

The alarm valve 20 has a check valve structure, and water flows only from the main pipe side toward the sprinkler head. Switch 2 attached to alarm valve when water flows
1 is turned on, and the pump is started to supply water to the secondary pipe 30 in which the sprinkler head is installed.

[0007] As shown in FIG.
The sprinkler heads 40 are provided at the ends thereof. The sprinkler head 40 is hermetically closed by an internal valve at the time of caution, and when a fire occurs and a certain amount of heat is detected, the valve is opened to discharge water filled in the secondary pipe 30.

The drain valve 50 is closed at the time of caution, and fills the secondary pipe with water to maintain a constant pressure in the pipe. When the drain valve is opened, it is necessary to drain the water when checking the sprinkler equipment or when adding or replacing a sprinkler head.

Next, the operation of the sprinkler equipment will be described. In the sprinkler system, the main pipe and the secondary pipe are filled with water at the time of warning, and the drain valve is closed. Also, with the alarm valve closed, the water pressure on the main pipe and the water pressure on the secondary pipe are equal,
The water pressure on the secondary side is slightly higher.

When a fire occurs, the sprinkler head 40
Is activated, the water pressure in the secondary side pipe 30 decreases, and a pressure difference occurs in the alarm valve 20 to open the valve, and water flows from the main pipe side to the secondary side. Then, the switch 21 attached to the alarm valve detects running water and turns on, the pump is started, water is supplied from the water source, and water is continuously discharged from the sprinkler head 40. When the fire is extinguished, the valve 22 installed between the alarm valve 20 and the main pipe 10 is closed, and the discharge of water from the sprinkler head 40 is stopped.

[0011]

As described above, the pipes of the sprinkler equipment are filled with water.
If the sprinkler head needs to be replaced or added for any reason, it is necessary to drain the water in the secondary side piping. The procedure is as follows: the valve 22 installed between the alarm valve 20 and the main pipe 10 is closed and then the drain valve 5 is closed.
After the water is drained from the secondary pipe 30, the sprinkler head is replaced. In addition, even after the work, there was a work to fill the secondary side pipe with water, which was very troublesome.

When a fire occurs during the extension work, water from the main pipe is not supplied to the sprinkler head because the valve 22 is closed, and even if the sprinkler head operates, water is not discharged and the fire is started. There have been reports of cases where the fire spread, and there has been a demand for a sprinkler facility that can add and replace sprinkler heads without draining the secondary piping.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sprinkler system which does not drain water from the secondary pipe, that is, allows the work of adding and replacing sprinkler heads while maintaining the function of the sprinkler system.

[0014]

In order to achieve the above object, according to the first aspect of the present invention, a swing check valve structure is installed inside a pipe member connecting joint installed on a secondary side pipe, and The closing valve in the structure is gradually opened and closed depending on the degree of insertion of the connecting member.

The pipe member connecting joint having the above structure is connected to the end of the unwinding pipe of the secondary pipe, and the secondary pipe is filled with water. Next, the sprinkler head is connected to the filled unwound tube via the pipe member connection joint. The closing valve is pushed up by screwing the male thread portion of the sprinkler head into the piping member connection joint, and the valve is always opened, so that the water filled in the unwinding pipe flows into the nozzle of the sprinkler head. When replacing the sprinkler head, loosen the male screw of the sprinkler head to some extent, the tip of the male thread holding the shut-off valve will move downward, and the pressure in the piping will cause the shut-off valve to close. Rotate. Further, when the male screw is loosened, the shut-off valve is completely closed, and water in the pipe does not flow out even if the sprinkler head is removed.

Further, when the sprinkler head is withdrawn, the shut-off valve having the above-mentioned structure is provided so that the shut-off valve is securely closed regardless of the pressure in the pipe.
The spring is always biased in the closing direction. This makes it possible to reliably close the shut-off valve even when there is not enough pressure in the pipe to rotate the shut-off valve.

Further, when the sprinkler head is attached to the pipe member connecting joint having the above structure, the spring-biased closing valve is smoothly rotated by inserting the sprinkler head. In the valve, a projection is provided at a position where the valve comes into contact with the valve seat of the closing valve.

By providing the projection, the force required to insert the sprinkler head and open the shut-off valve can be opened with a smaller force than when there is no projection, so that the work of mounting the sprinkler head can be performed smoothly. It can be carried out.

According to the above description, the sprinkler head can be replaced while the secondary pipe is filled with water, that is, while the function of the sprinkler equipment is maintained. According to a fourth aspect of the present invention, the above structure is installed on the sprinkler head mounting side of the unwinding tube.

According to a fifth aspect of the present invention, the above-mentioned structure is installed inside a multi-port joint having three or more locations for connecting piping members, so that the sprinkler head can be expanded while maintaining the function of the sprinkler facility. And the unwinding tube can be replaced.

[0021]

FIG. 1 shows a first embodiment of the present invention.
3 will be described with reference to FIG. 1 is a sectional view of a socket having the structure of the present invention, FIG. 2 is a sectional view of a process of connecting a sprinkler head to the socket of FIG. 1, and FIG. 3 is a sectional view of a state where a sprinkler head is connected to the socket of FIG. is there.

As shown in FIG. 1, the socket 60a having the structure of the present invention has an unwinding tube connected to the connection port at the upper end and a female screw 61 screwed to the sprinkler head at the connection port at the lower end. The internal structure is such that the closing valve 62 has the hinge pin 6
The closing valve is always urged by a spring 64 in a closing direction. A projection 65 is provided at a position farthest from the hinge pin 63 in a contact portion of the closing valve with the valve seat. An O-ring 66 is embedded between the closing valve 62 and the female screw 61.

Next, the process of connecting the sprinkler head 40 to the socket 60a having the above structure will be described. 2, the inside of the unwinding tube 32 and the socket 60a is filled with water in advance, and the closing valve 62 is closed. When the male screw 41 of the sprinkler head 40 is screwed into the socket 60a,
The tip of the cylindrical portion 42 slightly smaller in diameter than the inner wall of the socket installed above the male screw of the sprinkler head comes into contact with the projection 65, and the closing valve 62, which is biased by the spring 64, slightly rotates to open the valve. , The water filled in the unwinding tube 32 and the socket 60a is
0 flows into the nozzle 43.

The sprinkler head is sealed by a valve provided at the lower end of the nozzle, and the nozzle of the sprinkler head is filled with water. The O-ring 66 prevents water from leaking from the gap between the outer periphery of the cylindrical portion 42 of the sprinkler head and the inner wall of the socket. When the sprinkler head is further screwed in, as shown in FIG.
The closing valve can be rotated to the maximum position by the tip of 2 and can be kept open.

The sprinkler head 40 is connected to the socket 60
The process of disconnecting from the a is a procedure completely opposite to the process of connecting. When the male screw 41 of the sprinkler head 40 is loosened, the shut-off valve 62 is urged by the spring 64 in the direction in which the spring is closed. The water in the unwinding tube 32 and the socket 60a does not flow out in large quantities when the sprinkler head is removed because it is closed. Accordingly, the sprinkler head can be replaced while the secondary pipe is filled with water, that is, while the function of the sprinkler equipment is maintained.

Next, an elbow having the structure of the present invention will be described as a second embodiment with reference to FIG. FIG. 4 is a sectional view of the elbow. The structure and method of use are the same as in the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted. The difference between the elbow 60b and the first embodiment is that the connection port of the unwinding pipe is perpendicular to the connection port of the sprinkler head.

Further, a multi-port joint having the structure of the present invention will be described as a third embodiment with reference to FIG. FIG. 5 is a sectional view of the multiport joint. The structure of this multi-port joint 60c is as follows.
The internal structure of the sprinkler connection side end of the first embodiment is
A plurality of components are installed inside one joint, and the same components are denoted by the same reference numerals and description thereof is omitted. Here, since each of the closing valves 62 is biased by a spring 64, they do not open unless they receive a force from the surface on the valve seat side.
A female screw 67 screwed on the upper part of the multi-port joint is connected to the secondary pipe 30.

Thus, in the case where the installation position of the sprinkler head on the ceiling surface is changed due to a change in the partition of the room or the like, the state in which the secondary side pipe is filled with water, that is, the function of the sprinkler equipment is maintained. Thus, the unwinding tube to which the sprinkler head is connected can be detached from the multi-port joint, and a new unwinding tube having a length matching the sprinkler head installation position can be newly connected.

[0029]

As described above, the sprinkler according to the present invention allows the sprinkler head to be added or replaced while maintaining the function without draining the secondary pipe of the sprinkler equipment by the pipe member connecting joint. Equipment can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a socket having the structure of the present invention.

FIG. 2 is a sectional view of a process of connecting a sprinkler head to the socket of FIG. 1;

FIG. 3 is a sectional view showing a state where a sprinkler head is connected to the socket of FIG. 1;

FIG. 4 is a sectional view of an elbow having the structure of the present invention.

FIG. 5 is a sectional view of a multi-port joint having the structure of the present invention.

FIG. 6 is a perspective view of a secondary pipe.

FIG. 7 is a piping diagram of a wet sprinkler system.

[Explanation of symbols]

 Reference Signs List 40 sprinkler head 41 male screw 42 cylindrical part 60a socket having structure of the present invention 62 closing valve 64 spring 65 protrusion 66 O-ring

Claims (5)

[Claims] An internal structure of a joint on a pressurized side of a sprinkler system has a swing check valve structure, and a shutoff valve in the structure gradually opens and closes depending on a degree of insertion of a connecting member. A pipe member connection joint which is closed. 2. The piping member connection joint according to claim 1, wherein the closing valve of the piping member connection joint according to claim 1 is always biased by a spring in a closing direction. 3. The piping member connection joint according to claim 1, wherein a projection is provided at a portion of said closing valve that comes into contact with a valve seat of said closing valve. 4. A piping member connection joint according to claim 1, wherein the structure of said connection member connection joint according to claim 1 is installed on a sprinkler head mounting side of an unwinding pipe. 5. A piping member connection joint according to claim 1, wherein the structure of the piping member connection joint according to claim 1 is installed in a multi-port joint.