JPH09262310A - Unwinding piping unit and rotary pipe joint for sprinkler fire extinguishing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unwinding piping unit which is light in weight, simplified in structure and improved in fixing state. SOLUTION: This unwinding piping unit 1 is composed of a joint part 4 which has a connection port 42 to water supply piping and can freely rotate that connection port 42, flexible part 5 composed of a flexible pipe connected to that joint part 4, and fitting part 6 having a connection port 62 to a sprinkler head connected to that flexible party 5. At this time, the unwinding piping unit 1 is constituted by resin molding as a whole. Then, the joint part 4 and the fitting part 6 respectively have loop-shaped inserting grooves on the side of the flexible part 5 at inner and outer pipe peripheries, and both the terminals of the flexible part 5 are respectively inserted into the respective inserting groves and adhesively fixed. The wind-out piping unit 1 is made light in weight as a whole, burden at the time of construction work is reduced, electric insulation is provided and electric wiring above the ceiling is not affected. Then, this unit can be surely fixed by adhesion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unwinding piping unit for sprinkler fire extinguishing equipment using a flexible pipe and a rotary pipe joint used for the unwinding piping.

[0002]

In the conventional piping of a sprinkler fire extinguishing facility in a building or the like, the ceiling surface to which the sprinkler head is attached is separated from the water supply pipe of the fire extinguishing water so that the head can be easily placed at a predetermined position. An unwinding pipe is used to connect the two by using a connecting pipe unit. As the unwinding piping unit, for example, a flexible tube (hereinafter referred to as a flexible tube) disclosed in Japanese Utility Model Publication No. 58-46835, whose mounting position can be easily adjusted to the front, rear, left and right, and up and down.
There is a thing using. This flexible tube is made of metal such as stainless steel and is excellent in pressure resistance as a material, but it is heavy and requires a sturdy structure such that the ring members are caulked to fix both ends.

Therefore, a first object of the present invention is to obtain an unwinding piping unit having a light weight and a simple structure.

The unwinding piping unit as described above is disclosed in Japanese Unexamined Patent Publication No. 6-337082.
The mounting portion is fixed to the support member using a fixing metal fitting. If a flexible pipe (similar to a short pipe connected with a rotary pipe joint) is provided between the joint part connected to the water supply pipe and the attachment part for attaching the sprinkler head, pressurized water is supplied when tightening is insufficient. As the flexible pipe is not fixed, stress may be generated when running water or running water is generated inside, and the position of the sprinkler head may change due to the mounting part rotating or moving up and down.

Therefore, a second object of the present invention is to obtain an unwinding piping unit in a good fixed state.

Further, as a structure of the rotary pipe joint used in the unwinding pipe unit, for example, a push-on type pipe joint structure is shown in Japanese Utility Model Laid-Open No. 5-1886.
In this pipe joint, the elastic retaining ring fitted in the groove on the outer circumference of the male pipe is pressed by the bag portion of the female pipe to prevent the pipe joint from coming off. Such a retaining ring performs a desired action when it is fitted in the groove of the male pipe, but if a force is applied in the direction of removal when the retaining ring is disengaged from the groove due to pushing back, etc. The joint may come off.

[0007] Therefore, a third object of the present invention is to provide a rotary pipe joint which can be securely provided with a retaining action even when used in an unwinding piping unit of a sprinkler fire extinguishing equipment.

[0008]

The first aspect of the present invention comprises a joint portion having a connection port to a water supply pipe and capable of freely rotating the connection port, and a flexible pipe connected to the joint portion. And a mounting portion having a sprinkler head connection port connected to the flexible portion, wherein the unrolling piping unit is formed by resin molding. The joint portion and the mounting portion each have an annular insertion groove on the flexible portion side of the inner and outer circumferences of the pipe, and both ends of the flexible pipe of the flexible portion are inserted into the respective insertion grooves and fixed by adhesion or welding. It is a thing. Therefore, the entire unwinding piping unit becomes light in weight, the load at the time of construction work is reduced, and the stress such as vibration can be relieved after fixing the unwinding piping unit. In addition, it is electrically insulating and does not affect the electrical wiring in the ceiling. The structure of the unwinding piping unit is also simplified, and it can be securely fixed by adhesion.

A second aspect of the present invention is a joint part having a connection port to a water supply pipe and capable of freely rotating the connection port, and a flexible part composed of a flexible pipe connected to the joint part.
An unwinding piping unit consisting of a mounting portion having a sprinkler head connection port connected to the flexible portion, characterized in that the mounting portion has a polygonal cross section, and the mounting portion moves up and down. It has a stop groove.

Therefore, when the mounting portion of the unwinding piping unit is fixed to the supporting member by using the fixing metal fitting, it is possible to make surface contact, the holding force is improved, and the sprinkler head is displaced due to rotational movement. There is nothing to do.
Then, by hooking the fixing metal fitting in the groove of the mounting portion, the vertical movement of the arrangement of the sprinkler head can be reliably prevented.

Further, according to a third aspect of the present invention, a male pipe is inserted into a female pipe, and an annular retaining groove is provided on an outer periphery of the male pipe at a joint portion connecting the both pipes to each other so that the female pipe is rotatable. Provide a bag part that presses in a bag shape at the tip of the, and provide a retaining ring that fits into the retaining groove and contacts the inner surface of the bag. It has a detent ring, and is characterized in that a ring-shaped packing is interposed in a watertight manner between the male tube and the female tube on the tip side of the retaining groove of the male tube. It has an insertion hole that communicates with the gap formed when it is brought into contact with the tip.

Therefore, the retaining ring of the rotary pipe joint will not be displaced from the predetermined position and can be reliably fitted into the retaining groove. Furthermore, the detent ring can be reliably inserted from the insertion hole.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. FIG. 1 is an external view of an unwinding piping unit used in a sprinkler fire extinguishing facility according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of essential parts for showing a joint portion and a connection state of a joint portion and a flexible portion. It is a figure.

The unwinding piping unit 1 of FIG. 1 is a connecting piping unit for easily disposing the sprinkler head 3 at a predetermined position from the water supply pipe 2 of the fire fighting water shown in FIG. A joint portion 4 that is screwed into a branch joint 21 called cheese for making, and a flexible portion 5 that can be freely curved and arranged at a predetermined length connected to the joint portion 4.
The flexible portion 5 includes an attachment portion 6 connected to the opposite side of the joint portion 4 and attached with the sprinkler head 3.

The joint portion 4 is made of a resin male pipe 43 having an octagonal grip portion 41 and a water supply pipe connecting port 42 having a thread on the outer periphery, and an adhesive portion 44 and a male pipe to which the flexible portion 5 is connected and fixed. 43 a female pipe 4 made of resin having a bag portion 45 covering the outer circumference
6 and 6, a rotary pipe joint is rotatably formed, and only the water supply pipe connection port 42 is rotatable with respect to the entire unit 1.

The structure of this rotary pipe joint is the male pipe 43.
A retaining C-ring 48 fitted in a retaining groove 47 formed in a ring shape on the outer periphery of the abutment is in contact with the inner surface of the bag portion 45 of the female pipe 46, and is filled with water inside the pipe 49 so that the hydraulic pressure is increased. Even if an attempt is made to pull out the male pipe 43 from the female pipe 46, the male pipe 43 will not come off because the bag portion 45 and the retaining groove 47 are engaged with each other via the retaining C ring 48. Since the retaining C-ring 48 is not fixed but only in contact with the retaining groove 47 and the bag portion 45, the male tube 43 is free to rotate with respect to the female tube 46. Yes, the male pipe 43 can be rotated while fixing the female pipe 46. That is, regardless of the state of the unit 1, the water supply pipe connection port 42 of the joint portion 4 can be screwed and connected to the branch joint 21 of the water supply pipe 2.

The retaining C-ring 48 has an insertion hole 7 having a lid 70 which communicates with the inside of the bag portion 45 when the male pipe 43 is pushed into the female pipe 46 as shown in FIGS. 3 and 4.
It can be pushed in from 1 so as to fit into the retaining groove 47. Then, when the male pipe 43 is pulled back and the retaining C ring 48 is brought into contact with the bag portion 45, a gap is created on the distal end side of the male pipe of the retaining C ring 48. If the retaining C-ring 48 is not sufficiently fitted in the retaining groove 47, the retaining C is prevented when the male pipe 43 is pulled back.
The ring 48 remains at the position shown in FIG. 3, and only the retaining groove 47 is shown in FIG.
It may move to the position of and come off. At this time,
Since the bag portion 45 and the retaining groove 47 do not engage with each other via the retaining C ring 48, the male pipe 43 may be suddenly pulled out from the female pipe 46 when filled with water.

On the other hand, in the state shown in FIG.
After pushing in the ring 48, the male pipe 43 is pulled back, and after confirming the fitting of the retaining C ring 48 and the retaining groove 47,
The detent C ring 72 is further pushed in from the insertion hole 71. The position of the retaining C ring 48 inside the bag portion 45 is restricted by the detent C ring 72 over the outer circumference of the male pipe 43, and the fitted state of the retaining C ring 48 and the retaining groove 47 may be removed. There is no. Further, when the water is filled, there is no concern that the male pipe 43 will come off from the female pipe 46, so that the male pipe 43 can be used with peace of mind.

Further, between the female pipe 46 and the male pipe 43 of the joint portion 4, a seal groove 73 is formed all around the inside of the female pipe 46 from the retaining C ring 48 to the tip end side of the male pipe 43. −
A ring-shaped packing 74 made of a ring is arranged. The packing 74 is pressed against the inner surface of the seal groove 73 and also pressed against the outer peripheral surface of the male pipe 43.
The watertight state is maintained between the female pipe 46 and the male pipe 43.

Next, FIG. 2 shows a fixed state of the flexible tube 51 and the blade 52 constituting the flexible portion 5 and the adhesive portion 44 of the joint portion 4. Here, flexible tube 51
Is a pipe member that can freely bend while having a pressure resistance when filled with water, and the blade 52 is a flexible pipe 51.
The curved flexible tube 51 is covered with the outer circumference of the fiber member and has a structure in which a fiber member is woven in a mesh to prevent the curved flexible tube 51 from extending straight.

The adhesive portion 44 of the joint portion 4 has an annular insertion groove 75 on the end surface on the side of the flexible portion 5 of the female pipe 46, and is formed of a bellows-like flexible resin flexible pipe 51 and flexible pipe 51. The ends of the resin blade 52, which is woven into a fibrous shape while protecting the outer periphery thereof, are inserted into the insertion grooves 75 and are fixedly adhered by the adhesive 53.

The wall surface in the insertion groove 75 is formed in a saw-tooth shape so that the adhesive surface between the adhesive 53 and the female pipe 46 is wide and the engaging force is large. Furthermore, since the flexible tube 51 is bellows-shaped and the blade 52 is wrapped around the tip of the flexible tube 51, the adhesive strength is large like the wall surface of the insertion groove 75 and the adhesive 53 does not come off. As a result, The flexible portion 5 and the joint portion 4 are watertightly and securely fixed. Although not described, the opposite side of the flexible portion 5 is adhesively fixed to the adhesive portion 61 of the mounting portion 6 in the same manner as the adhesive portion 44 of the joint portion 4.

Although the flexible tube 51 has a bellows shape, it may have a spiral shape, and at this time, the serrated shape of the insertion groove 75 is formed so as to match the spiral shape. You may. Further, although the adhesive 53 is used for the above fixing, other than that, a welding member may be inserted into the insertion groove 75 together with the tips of the flexible tube 51 and the blade 52, and fixed by welding by ultrasonic welding or the like. .

Finally, as shown in FIG. 1, the mounting portion 6 is formed by resin-molding into a tubular shape having an octagonal cross section, and the sprinkler head 3 is further mounted as an opening at the tip. Head connection port 61 is provided.
As shown in FIGS. 5 and 6, the attachment portion 6 is fixed to the support member 64 using a pair of fixing metal fittings 65 so that the sprinkler head 3 is located at an appropriate position with respect to the ceiling plate 31.

When a piping unit having a bendable member such as the flexible portion 5 is used, the position of the piping unit may shift due to the force of running water when a fire occurs. At this time, there are many displacements in height due to the rotation of the pipe which the fixing metal fitting loosely presses. On the other hand, since the mounting portion 6 of the unwinding piping unit 1 is formed so that its cross section has an octagonal plane and a corner, when it is fixed to the support member 64 by the fixing bracket 65, there is no flat contact or bite. When it is generated and firmly fixed, the positional deviation can be prevented even if the fixing bracket 65 is loosened to some extent.

Further, in this embodiment, the groove 6 of the mounting portion 6 is
Since the hooking piece 66 of the fixing metal fitting 65 is fitted in 3,
Furthermore, the firm installation position is fixed.

Since the unwinding piping unit 1 as described above is made of resin, it has lower pressure resistance than a commonly used one made of metal. And there is concern about installing in a place where the head pressure is unnecessarily large, such as in a high-rise building. Therefore, such an unwinding piping unit 1
Is preferably provided on the secondary side of the pressure regulating valve 22 as shown in FIG.

That is, the pressure regulating valve 22 has a pressure regulating pilot valve 23 into which the secondary pressure of the water supply pipe 2 on the secondary side thereof is introduced via a pipe 27, and from the water supply main pipe 25 on the primary side. The primary pressure via the pipe 28 is introduced into the cylinder 24 of the pressure regulating valve 22 in accordance with the secondary pressure via the pipe 29, and the degree of pressure release is adjusted.

As a result, no matter what the high pressure of the water supply main pipe 25 on the primary side is, the pressure regulating valve 22 is provided on the water supply pipe 2 on the secondary side.
It becomes a constant pressure adjusted by the action of. Therefore,
Water can be discharged from the sprinkler head 3 at an appropriate pressure, and unnecessary high pressure is not applied to the unwinding piping unit 1.

Here, the pressure regulating pilot valve 23 has a function of replenishing the primary pressure to the secondary side through the pipe 27 at the same time when a slight fluctuation of the secondary pressure is opened, and this bypass replenishment is in time. No, the main valve of the pressure regulating valve 22 is opened when the sprinkler head 3 is opened. The start valve 26 is a solenoid valve provided so as to shut off the pipe 29 for pressurizing the cylinder 24 of the pressure regulating valve 22 from the pressure regulating pilot valve 23, and a fire detector for detecting a fire separately from the sprinkler head 3. It is designed to be opened based on a signal from such means. As a result, the unit of the pressure regulating valve 22 is configured as a so-called pre-operated sprinkler facility. Even if the start valve 26 is removed, it operates as so-called wet sprinkler equipment. Further, in FIG. 7, the water supply pipe 2 which is the secondary side of the pressure regulating valve 22 can also be made of a resin pipe, which is a facility with low cost and simple construction.

As described above, according to the first aspect of the present invention, the joint portion 4 having the connection port 42 to the water supply pipe 2 and capable of freely rotating the connection port 42, and the flexible portion connected to the joint portion 4. An unwinding piping unit 1 comprising a flexible portion 5 composed of a pipe 51 and a mounting portion 6 having a connection opening 62 to the sprinkler head 3 connected to the flexible portion 5,
The unwinding piping unit 1 is characterized by being entirely formed by resin molding, and the joint portion 4 and the mounting portion 6 each have an annular insertion groove 75 on the flexible portion 5 side on the inner and outer circumferences of the pipe. Both ends of the flexible tube 51 of the flexible portion 5 are inserted into the respective insertion grooves 75 and fixed by adhesion or welding.

Therefore, the unwinding piping unit 1 as a whole becomes light in weight, the load during construction work is reduced, and the stress such as vibration can be relieved after the unwinding piping unit 1 is fixed. In addition, since it becomes electrically insulating, it does not affect the electrical wiring under the ceiling and is not affected by the welding work of the lightweight steel ceiling substrate.
Further, the structure of the unwinding piping unit 1 itself is also simplified and can be securely fixed by adhesion or welding.

The second invention comprises a joint portion 4 having a connection port 42 for the water supply pipe 2 and capable of freely rotating the connection port 42, and a flexible pipe 51 connected to the joint part 4. And a mounting portion 6 having a connection port 62 to the sprinkler head 3 connected to the flexible portion 5,
In the unwinding piping unit 1, the mounting portion 6 has a polygonal cross section, and the mounting portion 6 has a groove 63 for stopping vertical movement.

Therefore, when the mounting portion 6 of the unwinding piping unit 1 is fixed to the support member 64 by using the fixing metal fittings 65, surface contact can be achieved, the holding force is improved, and the sprinkler head 3 rotates to rotate. There is no displacement of the position. Then, the fixing bracket 6 is placed in the groove 63 of the mounting portion 6.
By hooking 5, the vertical movement of the arrangement of the sprinkler head 3 can be reliably prevented.

Furthermore, in the third invention, the male pipe 43 is replaced by the female pipe 4.
In the joint portion 4 which is inserted into the connector 6 and rotatably connects both pipes to each other, an annular retaining groove 47 is provided on the outer circumference of the male pipe 43, and a bag portion 45 for pressing the female pipe 46 in a bag shape is provided at the tip thereof. Provided is a retaining ring 48 which is fitted into the retaining groove 47 and comes into contact with the inner surface of the bag portion 45, and a detent ring 72 is provided in a gap formed when the retaining ring 48 is brought into contact with the tip inside the bag portion 45. A groove 47 for retaining the male pipe 43
A ring-shaped packing 74 is watertightly interposed between the male pipe 43 and the female pipe 46 on the more distal end side, and further, when the retaining ring 48 is brought into contact with the distal end inside the bag portion 45. It has an insertion hole 71 communicating with the gap.

Therefore, the retaining ring 4 of the rotary pipe joint
8 does not deviate from the predetermined position and can be securely fitted into the retaining groove 47. Furthermore, the detent ring 72 can be reliably inserted from the insertion hole 71.

[Brief description of drawings]

FIG. 1 is an external view of an unwinding piping unit as an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a joint part of FIG.

FIG. 3 is a sectional view of the principal part of FIG. 1 similar to FIG.

FIG. 4 is a cross-sectional view of the main part at another angle, showing the insertion hole portion of FIG. 3;

FIG. 5 is a plan view showing a fixed state of the mounting portion of FIG.

FIG. 6 is a side view of FIG.

FIG. 7 is a preferred system configuration diagram of the unwinding piping unit of FIG.

[Explanation of symbols]

 1 unwinding piping unit 2 water supply pipe 3 sprinkler head 4 joint part 42 water supply pipe connection port 43 male pipe 45 bag portion 46 female pipe 47 retaining groove 48 retaining lock C ring 5 flexible portion 51 flexible pipe 52 blade 6 mounting portion 62 head Connection port 71 Insert hole 72 Detent C ring 74 Packing

Claims (6)

[Claims] 1. A joint part having a connection port to a water supply pipe and capable of freely rotating the connection port, a flexible part composed of a flexible pipe connected to the joint part, and a flexible part connected to the flexible part. An unwinding piping unit comprising a mounting portion having a connection port to a sprinkler head, wherein the unwinding piping unit is formed by resin molding. . 2. The joint section and the mounting section each have an annular insertion groove on the flexible section side of the inner and outer circumferences of the tube, and both ends of the flexible tube of the flexible section are inserted into the respective insertion grooves and fixed by adhesion or welding. The unwinding piping unit of the sprinkler fire extinguishing equipment according to claim 1. 3. A joint part having a connection port to a water supply pipe and capable of freely rotating the connection port, a flexible part composed of a flexible pipe connected to the joint part, and a flexible part connected to the flexible part. An unwinding piping unit for a sprinkler fire extinguishing facility, wherein the unwinding piping unit has a mounting portion having a connection port to a sprinkler head. 4. The unwinding piping unit for sprinkler fire extinguishing equipment according to claim 3, wherein the mounting portion has a groove for stopping vertical movement. 5. A joint portion in which a male pipe is inserted into a female pipe and both pipes are rotatably connected to each other, and an annular retaining groove is provided on an outer periphery of the male pipe, and a bag is provided at a tip of the female pipe. A retaining ring that fits in the retaining groove and is brought into contact with the inner surface of the retaining portion, and returns to the gap created when the retaining ring is brought into contact with the tip inside the retaining portion. A rotary pipe joint having a retaining ring, wherein a ring-shaped packing is interposed in a watertight manner between the male pipe and the female pipe on a tip side of the retaining groove of the male pipe. 6. The rotary pipe joint according to claim 5, further comprising an insertion hole communicating with a gap formed when the retaining ring is brought into contact with a tip end inside the bag portion.