JPH0511958U - Sprinkler fire extinguishing equipment unwinding piping unit - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the rotary joint to rotate freely even when tightened to withstand high water pressure. The rotary joint of the unwinding piping unit U includes a female pipe joint A, a male pipe joint B inserted into the female pipe joint, a holding nut 11 screwed to the female pipe joint, and the female pipe. It is composed of a flange portion 5 of a male pipe joint which is rotatably sandwiched by the tip of the joint and a stopper portion 10 of a press nut, and a means 7 for sealing between the both joints.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hoisting piping unit for sprinkler fire extinguishing equipment, and more specifically to a rotary joint for connecting short pipes constituting the unit.

[0002]

[Prior Art]

 In buildings, etc., the water pipe of the sprinkler fire extinguishing system is separated from the ceiling surface to which the sprinkler head is attached, so the two are connected via a connecting pipe called an unwinding pipe. The conventional unwinding pipe is composed of a plurality of short pipes connected via a rotary joint to form a so-called unwinding piping unit. Since this unwinding piping unit can be rotated vertically or horizontally at the rotary joint, it can be easily arranged in accordance with the distance between the water distribution pipe and the sprinkler head.

[0003]

[Problems to be solved by the device]

 Since the conventional unwinding piping unit may be subjected to a high water pressure of 10K or more, it is necessary to firmly fix the rotary joint to withstand pressure. However, if the rotary joint is strongly tightened, it is impossible to freely displace the unit while adjusting the space between the water pipe and the sprinkler head during the plumbing piping work. Therefore, the position of each short pipe is determined in advance with the rotary joint loosened, and then the joint is firmly tightened and fixed. However, doing so is troublesome because many rotary joints must be loosened or tightened, and the rotary joints may come off due to forgetting to tighten them. Also, in the sprinkler fire extinguishing equipment, a water pressure test for all pipes is obligatory, but since this test applies high water pressure, it is not after the installation work of the unwinding piping unit is completed and the rotary joint is strongly tightened. I can not do it. Therefore, depending on the result of the test, it may be necessary to reconnect the unwinding piping unit.

The present invention has been made in view of the above circumstances, and an object thereof is to enable the rotary joint to freely rotate even when tightened in a state capable of withstanding high water pressure.

[0005]

[Means for Solving the Problems]

 This invention is a sprinkler fire extinguishing system in which a water distribution pipe and a sprinkler head are connected via a unwinding piping unit composed of a plurality of short pipes connected by a rotary joint, and the rotary joint is a female pipe joint. A male pipe joint inserted into the female pipe joint, a holding nut screwed to the female pipe joint, and a distal end of the female pipe joint and a stopper portion of the holding nut are rotatably held. It is an object of the present invention to achieve the above object by a lowering piping unit of a sprinkler fire extinguishing facility, which comprises a flange portion of a male pipe joint and a means for sealing between the both joints.

[0006]

[Action]

 After the rotary joint is tightened to form a pipe unit that can withstand high water pressure, the tip of the unit is fixed to the water pipe, and the rear end of the unit is moved toward the sprinkler head. Displace while moving. At this time, since the flange of the male pipe joint is rotatably held by the tip of the female pipe joint and the stop of the press nut, the rear end of the unit can be easily connected to the sprinkler head. Wear.

[0007]

【Example】

Embodiments of the present invention will be described with reference to the accompanying drawings, in which the same reference numerals have the same names and functions. A threaded portion 2 is formed at the tip as a branch pipe connecting portion 1, and a straight cylindrical rotary niple 4 constituting a male pipe joint B is inserted into a fitting groove 3 at a rear end constituting a female pipe joint A. The front surface of the flange portion 5 of the joint B is brought into contact with the tip of the female pipe joint A. An O-ring 7 is fitted in the O-ring groove 6 of this male pipe joint B, and a seal is made between both joints A and B. A cap nut 11 having a stopper portion 10 is screwed onto the female pipe joint A, and the stopper portion 10 is brought into contact with the rear surface of the flange portion 5. In this state, the both surfaces of the flange portion 5 and the tip of the female fitting A rotary joint R _1, is rotatably held by the stopper portion 10 of the rotary joint R ₁ of the presser nut 11.

Next, the rear end of the rotary nipple 4 is fitted and fixed to the front end of the L-shaped female pipe joint A (rotary nipple 20). The L-shaped male pipe joint B (rotary nipple 24) is inserted into the fitting groove 3 of the female pipe joint A, and the front surface of the flange portion 5 of the joint B is brought into contact with the tip of the female pipe joint A. An O-ring 7 is fitted in the O-ring groove 6 of the male pipe joint B to seal between the joints A and B. The press nut 11 having the stopper 10 is screwed onto the female pipe joint A, and the stopper portion 10 is brought into contact with the rear surface of the flange portion 5. In this state, both surfaces of the flange portion 5 are rotatably supported by the tip of the female pipe joint A of the rotary joint R ₂ and the stopper portion 10 of the male pipe joint B of the rotary joint R ₂ .

Similarly, the short pipes P are sequentially connected via the rotary joints R ₃ and R ₄ including the female pipe joint A and the male pipe joint B to form the unwinding piping unit U having a predetermined shape.

Next, a method of attaching the piping unit U will be described. The branch pipe connection portion 1 of the unit U is screwed and fixed to the branch pipe 31 of the water distribution pipe 30, and the sprinkler head S is screwed to the sprinkler head attachment portion 60. When the rear end of the unit U is moved toward the position of the sprinkler head S on the ceiling surface F, the rotary joint R ₁ rotates in the horizontal direction as shown by the arrow A ₁ , and the rotary joint R ₁ also rotates. As shown by arrows A ₂ , A ₃ , and A ₄ , R ₂ , R ₃ , and R ₄ are displaced while rotating in the vertical direction, and gradually come close to a predetermined position where the sprinkler head S is fixed. Then, when the sprinkler head S of the sprinkler head attachment portion 60 of the unwinding piping unit U reaches a predetermined position, the sprinkler head S is fixed at that position.

The embodiment of the present invention is not limited to the above, and for example, when the distance between the water distribution pipe 30 and the ceiling surface F is narrow, the rotary joints R _{1 to} R ₄ are arranged as shown in FIG. Since it rotates and displaces, installation work can be done easily.

Further, the flange portion 5 formed in the male pipe joint B has a ring-shaped groove formed in the joint B instead of the ring-shaped protrusion, and a C ring is fitted in the groove, and the C ring is inserted. May project from the surface of the joint B. In this way, the holding nut 11 can be inserted from the joint end side, and thus it becomes easy to disassemble into individual parts.

Further, as shown in FIG. 4, the flange portion 5 of the male pipe joint B may be a C ring 51, and the stopper portion 101 may be formed at the tip of the female pipe joint A. The C-ring 51 is temporarily expanded and inserted into the C-ring groove 53 when the male pipe joint B is inserted into the female pipe joint A, and a plurality of pressing members 52 are provided in the stopper portion 101 to prevent the C-ring 51 from expanding again. It is attached to the insertion hole 102. By using this pressing member 52 at a plurality of places, both joints A and B will not come off. Therefore, in this configuration, since the presser nut is not used, it will not be loosened and will not be accidentally loosened during construction.

Instead of forming a male and female pipe joint in a pipe joint separate from the short pipe P to form a rotary joint separate from the short pipe, a female pipe joint or a male pipe joint is formed at the end of the short pipe. The short pipe and the joint pipe may be used together.

[0015]

[Effect of the device]

 Since the present invention is configured as described above, the unwinding piping unit rotates while maintaining a state in which high pressure water does not come out. Therefore, unlike the conventional example, it is not necessary to loosen or tighten the rotary joint, which simplifies the piping work and prevents accidental disconnection of the pipe due to forgetting to tighten it. Also, even if the ceiling piping work and ceiling board tensioning work are performed after connecting the unwinding piping unit to the water distribution pipe and the sprinkler head and performing a water pressure test on all pipes, after the completion of construction unlike the conventional example There is no need to test the hydraulic pressure again.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention and is an enlarged vertical sectional view taken along the line II of FIG.

FIG. 2 is a perspective view showing a usage state.

FIG. 3 is a perspective view showing another usage state.

FIG. 4 is an enlarged vertical sectional view showing another embodiment.

[Explanation of symbols]

5 Flange part 7 O-ring 10 Stopper part 11 Presser nut 30 Water distribution pipe 51 C-ring 101 Stopper part A Female pipe joint B Male pipe joint R ₁ rotary joint R ₂ rotary joint R ₃ rotary joint R ₄ rotary joint S Sprinkler head U winding Down piping unit

Claims (4)

[Scope of utility model registration request] 1. A sprinkler fire extinguishing facility in which a water distribution pipe and a sprinkler head are connected via a hoisting pipe unit composed of a plurality of short pipes connected by a rotary joint,
The rotary joint includes a female pipe joint, a male pipe joint inserted into the female pipe joint, a holding nut screwed to the female pipe joint, a tip of the female pipe joint, and a stopper portion of the holding nut. An unwinding piping unit for a sprinkler fire extinguishing facility, comprising a flange portion of a male pipe joint that is rotatably clamped, and means for sealing between the joints. 2. The unwinding piping unit for sprinkler fire extinguishing equipment according to claim 1, wherein the flange portion is a ring-shaped projection formed on the outer circumference of the male pipe joint. 3. The unwinding piping unit of the sprinkler fire extinguishing equipment according to claim 1, wherein the flange portion is a C ring fitted in a ring-shaped groove on the outer peripheral surface of the male pipe joint. 4. The unwinding piping unit of the sprinkler fire extinguishing equipment according to claim 3, wherein the presser nut is integrally formed with the female pipe joint, and has a presser member that keeps the C ring from coming out of the ring groove.