JPH0544876A - Winding-down pipe unit of sprinkler fire-extinguishing facilities - Google Patents

Abstract

PURPOSE:To make rotary joints withstand high water pressure and rotate freely at all times by connecting a winding-down pipe of sprinkler extinguishing facilities using the rotary joints. CONSTITUTION:Rotary joints R1 to R4 of a winding-down pipe unit are constituted by a female pipe joint A and a male pipe joint B which is inserted in it. A ring 9 which is fitted in a groove 8 of the male pipe joint B is engaged with a retaining section 11 at the tip of the female pipe joint A, and a seal packing 7 is provided in such a way that it contacts the ring 9 between both joints to constitute joints which can rotate freely and are sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting piping unit for sprinkler fire extinguishing equipment.

[0002]

2. Description of the Related Art Since a water pipe of a sprinkler fire extinguishing equipment installed in a building or the like is far from a ceiling surface to which a sprinkler head is attached, a connecting pipe combining a short pipe and an elbow (a 90 ° bent joint) The two are connected via so-called hoisting piping. Since it is troublesome to assemble this unwinding pipe based on the measurement at the site, a so-called unwinding pipe unit composed of a plurality of short pipes connected via a rotary joint is used. In this case, the rotary joint part is used. With this, it is possible to rotate in the vertical direction and the horizontal direction, and it is possible to simply arrange the water pipes and the individual sprinkler heads in alignment with each other.

[0003]

Since the conventional unwinding piping unit may be subjected to high water pressure, it is necessary to firmly fix the rotary joint in terms of pressure resistance. Therefore, after the position of the unit is determined in advance with the rotary joint loosened, the joint is firmly tightened and fixed. However, this is very troublesome because many rotary joints must be loosened or tightened, and the joints may come off due to water pressure due to forgetting or insufficient tightening. If the rotary joint is strongly tightened and fixed, it is not possible to easily perform fine adjustment to finally match the distance between the water distribution pipe and the attachment position of the sprinkler head when constructing the pipe.

[0004]

SUMMARY OF THE INVENTION In view of the above points, the present invention has an object to obtain a hoisting pipe unit having a rotary joint which can withstand high water pressure and can be freely rotated. A female pipe joint, a male pipe joint to be inserted into the female pipe joint, a holding portion at the tip of the female pipe joint, and packing interposed so as to fill between the both joints, and the male pipe joint A ring member which is fitted in a ring-shaped recess and is held by a pressing portion at the tip of the female pipe joint and a packing;
The connecting part of the unwinding pipe to the water distribution pipe has a rotary joint that rotates horizontally with respect to the pipe direction, and the other plural parts have rotary joints that rotate vertically with respect to the pipe direction. It is characterized by having.

Alternatively, there is provided an expansion joint comprising the above rotary joint, an outer tube having a female threaded portion at its tip, and an inner tube having a male threaded portion screwed to the female threaded portion and slidable via an O-ring. ,
And a connection part of the unwinding pipe to the water pipe and optional 1
It is characterized in that it has a rotary joint that rotates horizontally with respect to the pipe direction at a certain point, and optionally an expansion joint of the short pipe portion in the vertical direction.

[0006]

[Operation] After forming a hoisting piping unit with a rotary joint that can withstand high water pressure, fix the tip of the unit to the water distribution pipe, attach the sprinkler head to the rear end, and set the sprinkler head to the specified water pressure. When it moves to the position, the rotary joint is displaced while rotating. At this time, since the ring fitted in the ring-shaped groove of the male pipe joint that constitutes the rotary joint is sandwiched by the pressing portion at the tip of the female pipe joint and the packing pressed by water pressure, It is possible and at the same time well sealed.

[0007]

Embodiments of the present invention will now be described with reference to the drawings, in which the same reference numerals have the same names and functions. Figure 1
Is an example of the unwinding pipe unit U1 according to the present invention, and FIG. 2 is an enlarged sectional view of the rotary joint R3. 3 and 4 are enlarged cross-sectional views of the connection portions J1 and J2 at both ends thereof.

The unwinding piping unit U1 connects between the water distribution pipe connecting portion J1 and the sprinkler head connecting portion J2, and the rotary joint R1 which is always rotatable horizontally to the water distribution pipe connecting portion J1 and the rotary joint R1. Is connected to a rotary joint R2 which is always rotatable vertically, and rotary joints R3 and R4 which are always rotatable in the same direction as the rotary joint R2 are connected via pipes P1 and P2, and the sprinkler head is connected to the rotary joint R4. Connection part J
2 is connected. The joint and the connecting portion between the pipe and the like may be connected by welding or the like, but may be formed by integrating the joint and the pipe.

In the rotary joint R3, the fitting portion 3 in which one end of the L-shaped short pipe 5 is inflated so as to form the female pipe joint A.
Then, one end of the L-shaped short pipe 4 that constitutes the male pipe joint B is inserted. The male pipe joint B has a ring-shaped groove 8 and a spring-shaped ring 9 is fitted therein. The ring 9 is in contact with a pressing portion 11 of which the tip of the female pipe joint A is contracted. Between the female pipe joint A and the male pipe joint B, a concave seal packing 7 is provided so as to abut the ring 9. In this state, the female pipe joint A and the male pipe joint B of the rotary joint R3 are always rotatably connected via the ring 9.

In order to assemble the rotary joint R3, first, the seal packing 7 and the spring-shaped ring 9 are attached to the fitting portion 3 of the short pipe 5.
Put on. Then, the short tube 4 is inserted into the fitting portion 3 of the short tube 5. Then, the spring-shaped ring 9 is pushed by the tip of the short tube 4 and spreads, and the short tube 4 is inserted until the ring-shaped groove 8 thereof comes to the position of the ring 9. In this way, the ring 9 contracts and is fitted into the ring-shaped groove 8. After that, even if the short tubes 4 and 5 are tried to be separated, the ring 9 causes the ring-shaped groove 8
It is sandwiched between the pressing portion 11 at the tip of the short tube 5 and acts as a stopper. The other rotary joints R1, R2, and R4 have the same configuration as the rotary joint R3 and have the same operation.

The short pipe 51 constituting the female pipe joint A of the rotary joint R1 is not L-shaped but has a water distribution pipe connecting portion J1 formed at its tip and is screwed to a branch portion of the water pipe at the tip thereof. A male screw 2 is formed in the connecting portion 1. Since the water distribution pipe connecting portion J1 is formed at one end of the rotary joint R1, it is possible to rotate only the connecting portion 1 by using the grip portion 6 of the connecting portion 1 when connecting the unwinding piping unit U1. It is not necessary to rotate the entire unwinding piping unit U1.

A sprinkler head connecting portion J2 is attached to the L-shaped tip of the short pipe 5 constituting the female pipe joint A of the rotary joint R4.
Are connected. The sprinkler head connecting portion J2 is formed by a pipe 12, and a connecting portion 14 having a female screw 13 for screwing the sprinkler head is inserted into the tip of the pipe 12 and fixed by caulking or the like. The length of the pipe 12 is such that when the sprinkler head is attached, the tip of the pipe 12 projects from the ceiling and
It has a length that allows it to be fixed to a ceiling member such as a channel.

Next, the mounting of the above-mentioned unwinding piping unit U1 will be described with reference to FIG. Water pipe connection J
The connection part 1 of 1 is screwed and fixed to the branch pipe 31 of the water distribution pipe 30, and the sprinkler head connection part J2 is fixed to a ceiling member (not shown) so that the sprinkler head S is at a predetermined position. Since the rotary joints R2, R3, and R4 of the unwinding piping unit U1 can rotate in the same direction, they can be extended or contracted to connect in the same way regardless of whether the predetermined connection position is near or far. can do.

Further, as shown in the schematic view of FIG.
In the hoisting piping unit U1, the water distribution pipe connecting portion J1 and the sprinkler head connecting portion J2 are misaligned with each other, and it is difficult to accurately place the sprinkler head immediately below the branch portion of the water distribution pipe. For example, FIG. With such a pipe shape, it is possible to align the axes of both the connecting portions J1 and J2. In addition, another set of rotary joint and pipe may be added, so that not only can the sprinkler head be arranged directly below the branch portion of the water pipe, but also the mountable range can be widened.

The unwinding piping unit U2 shown in FIG.
In order to reduce the number of rotary joints of the unwinding piping unit U1, two joints are used so as to be rotatable in the horizontal direction. In that case, although there is a degree of freedom in the horizontal direction,
Since there is no freedom in the vertical direction, expansion joint T1 is used for the sprinkler head connection. Figure 8 shows expansion joint T
1 is an enlarged cross-sectional view of FIG. 1, and other rotary joints R1 and R2 and a water pipe connecting portion J1 are similar to those of the unit U1.

A fixing screw 16 is fitted on the inner surface of the distal end of the outer pipe 15 of the expansion joint T1, and the fixing screw 16 is fixed to the outer pipe 15 by caulking or the like so as not to rotate. Inner pipe 1 having a sliding screw 18 having an O-ring 17 at the rear end
9 is screwed to a fixing screw 16 at the tip of the outer pipe 15, and a connecting portion 21 having a female screw 20 for screwing a sprinkler head is fixed to the tip of the inner pipe 19 thereof. In this state, by rotating the connecting portion 21, the position of the tip of the connecting portion 21 slides up and down.

In the method of assembling the expansion joint T1, a sprinkler head connecting portion 21 is attached to the tip of an inner pipe 19 having a sliding screw 18, and an O ring 17 is attached to the rear end portion.
The slide screw 18 is inserted into the outer pipe 15 from the rear end portion of the inner pipe 19 while the fixing screw 16 is screwed onto the slide screw 18. Then, the fixing screw 16 is caulked and fixed to the tip of the outer tube 15.

Next, the mounting of the above-mentioned unwinding piping unit U2 will be described with reference to FIG. Water pipe connection J
The connection part 1 of 1 is screwed and fixed to the branch pipe 31 of the water distribution pipe 30, and the sprinkler head connection part (expansion joint)
T1 is fixed to a ceiling member (not shown) so that the sprinkler head S is at a predetermined position. Since the rotary joints R1 and R2 of the unwinding piping unit U2 can rotate in the same horizontal direction, the unwinding piping unit U2 can be extended or contracted to freely move in the horizontal direction regardless of whether the predetermined connection position is near or far. It can be moved and installed in the vertical direction,
It can be moved freely by using the expansion joint T1.

The position of the expansion joint T1 need only be a vertical portion of the unwinding piping unit U2, and need not be the sprinkler head connection portion. Also, the unwinding piping unit U1
The number of rotary joints may be increased and the total length may be extended as in the case of.

As described above, in each of the above embodiments, the rotary joints R1, R2, R3 and R4 (expansion joint T1) can be installed so as to be rotatable (expandable) while being filled with pressurized water. It is possible to perform fine adjustment of the position of the sprinkler head and rearrangement, and the construction is simple, and it is possible to check the connection failure due to water filling and pressurization without fixing the position of the sprinkler head.

[0021]

Since the present invention is constructed as described above,
The unwinding piping unit rotates while maintaining a state in which high pressure water does not come out even if it passes through. Therefore, the joint portion does not have to be loosened or tightened, which facilitates the construction of the pipe and prevents accidental disconnection of the joint portion due to forgetting to tighten the pipe.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing the structure of a rotary joint portion.

FIG. 3 is an enlarged cross-sectional view showing a structure of a water pipe connecting portion.

FIG. 4 is an enlarged cross-sectional view showing a structure of a sprinkler head connecting portion.

FIG. 5 is a schematic view showing an installation state of the present embodiment,
(A) is a case where the mounting position is close, and (b) is a case where the mounting position is far.

FIG. 6 is a schematic view showing the shape of the present embodiment, in which (a) is different from the axis of the water pipe connecting portion and the sprinkler head connecting portion, and (b) is the axis of the water pipe connecting portion. This is the case when the core and the axis of the sprinkler head connecting portion are the same.

FIG. 7 is a front view showing another embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view showing the structure of an expansion joint part.

FIG. 9 is a schematic view showing an installation state of another embodiment,
(A) is a case where the mounting position is close, and (b) is a case where the mounting position is far.

[Explanation of symbols]

 7 Seal packing 8 Ring groove 9 Ring 11 Holding part 15 Outer pipe 16 Fixing screw 17 O-ring 19 Inner pipe A Female pipe joint B Male pipe joint J1 Water pipe connection part J2 Sprinkler head connection part P1, P2 Pipe R1, R2, R3, R4 Rotary joint T1 Expansion joint U1, U2 Unwinding piping unit

Claims (2)

[Claims] 1. A hoisting pipe in which a plurality of short pipes are connected by a rotary joint for connecting a water distribution pipe and a sprinkler head, wherein the rotary joint is inserted into the female pipe joint and the female pipe joint. A male pipe joint, a pressing portion at the tip of the female pipe joint, a packing interposed so as to fill between the both joints, and a male pipe joint that is fitted into a ring-shaped recess of the female pipe joint. A ring member that is held by a pressing portion at the tip and a packing, and a rotary joint that rotates horizontally with respect to the pipe direction is provided at a connection portion of the unwinding pipe to the water distribution pipe, and a plurality of other portions. The unwinding piping unit of the sprinkler fire extinguishing equipment, which has a rotary joint that rotates perpendicular to the pipe direction. 2. In the unwinding pipe in which a plurality of short pipes are connected by a rotary joint or the like for connecting the water distribution pipe and the sprinkler head, a female pipe joint and a male pipe joint inserted into the female pipe joint. A pressing portion at a tip of the female pipe joint, a packing interposed so as to fill a space between the both joints, and a holding portion at a tip of the female pipe joint fitted into a ring-shaped recess of the male pipe joint. And a ring member held by a packing, a rotary joint including an outer tube having a female threaded portion at its tip and a male threaded portion screwed to the female threaded portion, and slides through an O-ring. Expansion joint with an inner pipe that can be connected to the distribution pipe of the unwinding pipe and a rotary joint that rotates horizontally to the pipe direction at any one place, and a short pipe portion in the vertical direction. A sprinkler characterized by having an expansion joint optionally Unwinding piping unit for fire fighting equipment.