JPH04118430A - Piping structure - Google Patents

Abstract

PURPOSE:To make it possible to connect slab built-in sheath pipe portions while keeping water leaking accident resistance by making sheath pipe connections as watertight structure in piping made by inserting a water pipe in sheath pipes provided with connecting sections in the midst. CONSTITUTION:In piping made by inserting a water pipe 7 in sheath pipes 3 and 3 provided with connecting sections in the midst, sheath connections 41 and 42 have watertight structures. For the watertight structure, as the sheath pipes 3 and 3, a corrugated pipe having alternately ring-shaped recessions and ring-shaped projections is used for a pipe wall, and both corrugated sheath pipe ends 30 and 30 are inserted in both ends of joint bodies 43 and 43 in the sheath pipe sections 41 and 42. Then, several pieces of packing 44 and 45 are loaded between the ring-shaped recessions of both corrugated sheath pipe ends 30 and 30 and joint bodies 43 and 43. Anchoring fixtures 47 interlocking with the ring-shaped recessions of the corrugated sheath pipe ends 30 and 30 are mounted to both ends of the joint bodies 43 and 43.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a piping structure constructed by a sheath pipe method.

<Conventional technology> In indoor piping work, sheath pipes are placed along a predetermined piping route during construction of the building's framework, and water pipes (water supply/hot water supply) are connected to the sheath pipes during construction of building equipment. In some cases, the so-called sheath pipe construction method is used to pass pipes (e.g., hot and cold water for air conditioning).

In addition, for water supply and hot water supply to scattered locations, especially in hotels, buildings, and large-scale residences, water supply and hot water supply pipes are installed directly from the water supply or hot water header to each water supply and hot water supply point. A header method is sometimes used that can guarantee a sufficient amount of water and hot water even when water is flowing simultaneously, regardless of the distance of the water supply or hot water supply point.In particular, the sheath pipe header method is used to implement this header method using a sheath pipe method. Recruitment is booming.

FIG. 6 shows a conventional piping structure using the sheath pipe header construction method. In FIG. 6, 1' is a water supply and hot water supply header. Reference numeral 61' denotes a faucet equipment connection box, for example a faucet box, for connecting faucets and other equipment, and is attached, for example, to the back surface of the wall panel 51' at each water supply/hot water supply point.

3' is a box 61 for connecting each faucet equipment from header 1'
It is a sheath pipe disposed across the box 61', with both ends raised up, and on the box 61' side, the raised upper end is connected to the bottom surface of the box 61'. 4' is a water pipe inserted into each sheath pipe 3', and one end of each water pipe 4' is connected to the header 1.
', and the other end is connected to each box 61'.
The other end is connected to a collar 63' or equipment (for example, a water heater, air-conditioning equipment) outside the box via a joint 62'.

<Problem to be Solved> In the piping structure described above, most of the sheath pipe is buried in the slab, but both ends are disposed on the slab. Therefore, after the sheath pipes were installed during building frame work, both ends of the sheath pipes were left on the floor slab surface until the water pipes were brought in during equipment work in the building. It often becomes an obstacle to construction work during that time. In particular, when the water supply/water heater is a unit bath, it may be necessary to run the sheath pipe directly under the waterproof pan of the unit bath, and in this case, the length of the sheath pipe that is laid on the slab becomes considerably long. ,
The above problems are serious.

Therefore, during the above-mentioned frame construction, only the slab-buried sheath pipe section is installed, and when the water pipe construction is carried out during facility construction, the slab upper sheath pipe section is laid, and the slab upper sheath pipe section that has been laid is It is meaningful to connect to the existing slab-embedded sheath pipe section.

By the way, in the piping structure using the above-mentioned sheath pipe construction method, even if water leaks in the water pipe, the water can be caught by the sheath pipe and eventually lead to the rising end of the sheath pipe, By attaching a train pan to a building, the water leakage can be handled without any problems and the interior materials of the building can be protected from water leakage.

However, if the above-mentioned connection between the slab-buried sheath pipe part and the above-mentioned slab-laid sheath pipe part is made in the same way as the connection of ordinary piping and wiring ducts, safe water reception by the sheath pipe can be guaranteed. The advantages of the piping structure against water leakage accidents cannot be guaranteed.

The purpose of the present invention is to maintain the water leakage accident resistance of the piping structure using the sheath pipe construction method, and to enable connection between the slab-buried sheath pipe parts and the slab-buried sheath pipe parts, thereby facilitating work on construction sites. be.

<Means for Solving the Problems> The piping structure according to the present invention is characterized in that in the piping formed by inserting a water pipe into a sheath pipe having a connection part in the middle, the sheath pipe connection part has a watertight structure. It is configured to do this.

<Explanation of Examples> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

In Fig. 1, 1 indicates the ladder to the water supply, and the branch port 11
．． ...and is installed in the piping space within the building. 2 is a water supply connecting pipe, which communicates between the header 1 and a main pipe (not shown). 3 indicates a sheath pipe, which consists of a slab-buried part 31 and slab-top laid parts 32 and 33. The slab-buried part 31 is installed during building frame construction, and the slab-topped parts 32 and 33 are used for water pipe work and units. It will be installed during equipment work such as lotus assembly work. As this sheath tube, a corrugated plastic tube having ring-shaped recesses and ring-shaped protrusions alternately provided on the tube wall can be used. 41 is the slab-embedded sheath pipe part 3
1 and the sheath pipe section 32 disposed on the slab on the header side, which shows the connection part 32 and has a watertight structure. 5 is a unit bus. Reference numeral 42 denotes a connecting portion between the slab-embedded sheath pipe portion 31 and the slab-mounted sheath pipe portion 33 on the unit bath side, and has a watertight structure. Reference numeral 61 indicates a faucet box fixed to the back of the wall panel of the unit bath 5. The sheath pipe section 33 disposed on the slab is raised toward this box 61, and the raised end is connected to the faucet box 61 in a watertight manner. be. 7 is a water pipe drawn into the sheath pipe 3, the water pipe end 70 on the header side is raised together with the sheath pipe part 32, and the upper end of the water pipe end 70 is connected to the branch port 11 of the header 1. It is. 8 is a drain pan attached to the upper end of the sheath tube portion 32. An end 71 of the water pipe 7 on the bath unit side is housed in a faucet box 61, and a collar 63 is connected to the water pipe end via an elbow joint 62. 64 is a box cover, 65 is a joint 62
A lock nut 66 screwed onto the tip of the lock nut 66 is a spacer, and by tightening the cap nut 65, the faucet box 61 is fixed to the wall panel 51 of the unit bath 5.

FIG. 2A is an explanatory diagram showing the structure of the sheath tube connecting portion 41, 42.

In FIG. 2A, 43 is a joint body, which has an annular protrusion 431 at the center of the inner surface of a cylindrical body, and screw grooves 432 are carved at both ends of the outer surface. Reference numerals 30 and 30 denote ends of the corrugated sheath tubes, which are respectively inserted into the joint body 43 until they come into contact with the annular projections 431. The inner diameter of this annular projection 431 is approximately equal to the inner diameter of the corrugated sheath tube 3. Reference numerals 44 and 45 designate elastic packings, which are installed in a compressed state between the ring-shaped recess of the corrugated sheath tube end 30 and the inner surface of the joint body 43. 46. 46 is a cap nut screwed onto the end of the joint body, 4
7 is a fastener housed in a cap nut, and has a tapered C-shaped ring (Fig. 2B shows a front view, and Fig. 2C shows a cross-sectional view taken along line C-C in Fig. 2B). By tightening the cap nut 46, the tapered C-shaped ring 47 is pressed against the inner peripheral edge 433 of the end face of the joint body, and the diameter of the ring 47 is reduced by the radial component force at the pressed position, and the corrugated sheath pipe end 30 It locks into the ring-shaped recessed edge.

In FIG. 2A, among the packings 44 and 45 mounted on each corrugated sheath tube end 30, it is preferable that the hardness of the inner packing 44 is higher than the hardness of the other packing 45. The high-hardness packing 44 can stably support the inner end of the sheath tube end portion 30 on the joint body 43, and the tapered C-shaped ring 47 sandwiching the high-hardness packing 44 and the soft packing 45 supports the sheath tube. Since the entire circumference is supported by the joint body 43, when a moment is applied to the sheath pipe, even if the sheath pipe tends to tilt inside the joint body due to its rigidity to a certain extent, the hard packing 44 and the tapered C-shaped ring 47 Due to the stable two-point support state, tilting can be effectively prevented.

Therefore, the thickness of the gap between the joint body 43 and the corrugated sheath tube end 30 can always be kept constant, and the sealing properties of the packings 44, 45, especially the soft packing 45, can be well guaranteed. To assemble the connection shown in FIG. 2A, after inserting the cap nut 46 into each corrugated sheath tube, insert the tapered C-shaped ring 47 into the ring-shaped recess at a predetermined position (usually 3 to 5 points from the tip of the corrugated sheath tube). The soft packing 45 and the hard packing 44 are inserted into the ring-shaped recesses (usually the first and third ring-shaped recesses) at predetermined positions.
to the fourth ring-shaped recess), and then
This corrugated sheath tube fitted with packing, etc. is press-fitted into the joint body 43, the tip of the sheath tube is brought into contact with the annular protrusion 431 of the joint body 43, and then the cap nut 46 is tightened.

FIG. 3A shows another example of the sheath tube connection structure used in the present invention, in which hard packing 4 is attached to each corrugated sheath tube end 30.30.
4. Soft packing 45 and Figures 3A and 3C (
The C-shaped rings 47 shown in FIG.
5 and C-type locking ring 47 against the elastic force,
Protrusion 471 of each C-shaped locking ring 47. ... at the end of the joint body 433. It is inserted into...

FIG. 4A is an explanatory diagram showing another example of the sheath tube connection structure used in the present invention, and FIG. 4B is bb in FIG. 4A.
This is a cross-sectional view, in which left and right slits 444, 444 and upper and lower slits 445, 445 are formed at a 90° angle at each end of the joint body 43 at a predetermined interval (usually one ridge of a corrugated sheath tube). Each corrugated sheath tube end 30 with holes drilled in different directions and fitted with a hard packing 44 and a soft packing 45 is press-fitted into the joint body 43, and the above-mentioned upper and lower slits 444 are inserted.
．． 444 and 445. U-shaped fasteners 47.
47, and both sides of each fastener 47 are locked in the ring-shaped recess of the corrugated sheath tube. In this case, since the end of the corrugated sheath tube is supported from all sides by the fasteners 47 and 47 on the joint body 43, the state of support of the end of the corrugated sheath tube by the fasteners is stable in this case as well. .

In the above, the joint body 43 can be made of vinyl chloride, polypropylene, polyethylene, polycarbonate, etc., and the fastener 47 can be made of metal such as brass, stainless steel, hard plastic such as polycarbonate, FRP, etc. The packings 44 and 45 can be, for example, O-rings, solid or hollow, and can be made of rubber or plastics with excellent elasticity.

A watertight connection is also used to connect the faucet box (made of plastic such as vinyl chloride) and the sheath tube, and in FIG. may be connected in the same manner as in FIG. 2A, FIG. 3A, or FIG. 4A. FIG. 5 shows an example of a watertight connection structure between the sheath tube insertion tube part 611 of the faucet box 61 and the sheath tube 3,
44 is hard packing, 45 is soft packing, 4
7.47 each indicate a fastener.

<Effects of the Invention> The piping structure according to the present invention has the configuration as described above,
Even though the sheath pipe is connected in the middle, the connection part has a watertight structure with packing, so even if water leaks from the water passage pipe inside the sheath pipe, the leakage water will be caught by the sheath pipe and the rising sheath The leakage water can be directed to the end of the pipe, and the leakage water can be disposed of without damaging the interior materials of the building using a drain pan or the like. In addition, only the sheath pipe part buried in the slab can be installed during the construction of the building frame, and the sheath pipe part laid on the slab can be installed during equipment work such as water pipe work, so it is possible to install the sheath pipe part buried above the slab during equipment work such as water pipe construction. During the construction period, obstacles on the floor slab can be thoroughly removed and construction work can proceed smoothly.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, FIG. 2 Δ is a longitudinal cross-sectional view showing an example of the sheath pipe connection part used in the present invention, and FIG. 2 B is the fastener in FIG. 2 A. Figure 2 C is a cross-sectional view taken along the line C-C in Figure 2 AL near ');
FIG. 3A is a sectional view showing another example of the sheath tube connection part used in the present invention, FIG. 3B is a front view without the fastener shown in FIG. 3A, and FIG. 3C is a front view of FIG. 3B. FIG. 4A is a partially sectional front view showing another example of the sheath tube connection part used in the present invention, and FIG. 4B is a cross-sectional view taken along line C--C of FIG. 5 is a cross-sectional view showing an example of the connecting portion between the faucet box and the sheath tube used in the present invention, and FIG. 6 is an explanatory view showing a conventional example. 3... Sheath pipe, 31... Slab buried sheath pipe part, 32.3
3...Sheath pipe section disposed on the slab, 4...Water pipe, 43.
...Joint body, 44...Hard packing, 45...Soft packing, 47... Fastener.

Claims (3)

[Claims] (1) A piping structure in which a water pipe is inserted into a sheath pipe having a connection part in the middle, the sheath pipe connection part having a watertight structure. (2) In claim (1), the sheath tube is a corrugated tube in which ring-shaped concave portions and ring-shaped convex portions are alternately formed on the tube wall, and the sheath tube connection portion is provided at both ends of the joint body. Each corrugated sheath tube end is inserted into each, several packings are installed between the ring-shaped recess of each corrugated sheath tube end and the fitting body, and the corrugated sheath tube ends are inserted at both ends of the fitting body. A piping structure characterized in that a connection structure is used in which a fastener is attached to a ring-shaped recess of the part. (3) In claim (2), there are two packings installed between the ring-shaped recess at the end of each corrugated sheath pipe and the joint body, and the inner packing of these packings is deeper than the other packing. 1. A piping structure characterized by having high hardness and having a fastener configured to support each corrugated sheath tube end portion to a joint body around the entire circumference or at least on all four sides.