JPH045878B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses flexible plastic pipes for hot water supply and water supply piping work, which are installed in protection pipes that are laid in advance as building construction progresses. This invention relates to improvements to the sheath pipe construction method for hot water and water supply, which is carried out by inserting tubes, and to improvements to protection pipes for sheath pipe type hot water and water supply piping, which are directly used in the sheath pipe construction method for hot water and water supply.

[Prior Art] A method of constructing piping for hot water and water supply using flexible plastic tubes has come into use. In this case, in order to prevent the plastic tube from getting caught on nails, steel, etc. in the building structure after piping and being damaged, a protective tube made of a flexible bellows tube is usually attached to the building structure. By laying a plastic tube in advance at the place where the piping is to be carried out, such as under the floor or in the ceiling of the building, and fixing it to the structure of the building, and then passing the plastic tube through the protective tube and piping, it is possible to create a double-tube-like plastic tube. The so-called sheath pipe construction method is used to enclose the outer periphery of the tube to prevent trouble after piping work and to facilitate maintenance.

[Problems to be Solved by the Invention] By the way, the above-mentioned sheath pipe construction method in which a flexible plastic tube is inserted into the inner cavity of a protective pipe that has been laid in the building structure in advance has been proposed. The hot water/water supply piping work carried out in this way is a construction method developed from the means used to achieve results in piping work for circulation pipes for heat medium or refrigerant in air conditioning facilities.

However, in the case of air conditioning facilities, there was no problem because the heat medium or refrigerant was used in a closed circuit that circulated at a constant pressure, but when used in piping for hot water and water supply, Due to the water hammer phenomenon when the hot water supply is stopped, the plastic tube comes to collide with the inner wall of the protection tube. BACKGROUND ART Impact noise has come to be generated under floors or inside walls, and this impact noise has caused a problem of making building residents feel uneasy.

The present invention has been made to solve this problem, and is carried out using a sheath pipe construction method in which a plastic tube is drawn into a protective pipe that has been laid in the building structure in advance. Hot water supply/
To provide a new means by which water supply piping work can be carried out without generating impact noise that makes residents feel uneasy after the work is completed.

[Means for Solving the Problems] In the present invention, as a means for achieving this object, a flexible plastic tube is drawn into a protective pipe that is laid in advance in the building structure, and then piped. proposed a sheath pipe construction method for hot water and water supply, which is characterized by filling the space surrounding the plastic tube inside the protective tube with a filler made of particles such as perlite or expanded polystyrene using air from one end of the protective tube. It is something to do.

[Example] Next, an example of implementation will be described in detail with reference to the drawings.

FIG. 1 is a longitudinal side view of a hot water/water supply pipe in the middle of piping work by means of the present invention, in which a is a protection pipe laid in advance in the building structure (omitted in the drawing), b is a plastic tube drawn into and piped into a protective tube a, c is a filler filled in the space W between the inner wall surface of the protective tube a and the outer wall surface of the plastic tube b, and d is a filler material c filled in the space W. A filling device is shown for filling the container.

The protective tube a is a normal type consisting of a main body 1 formed into a flexible bellows tube made of synthetic resin material, and cap bodies 2 fitted to both ends of the main body in the longitudinal direction. Depending on the progress of the construction work, fixing rings may be installed in advance under the floor, in the ceiling, or inside the wall structure, and fitted into the fitting parts of both ends of the main body part 1 and the cap body 2. There is no difference from the previous method in that the vinyl tape 2a is wrapped and connected integrally and laid by fixing it to the structure of the building. An insertion opening 20 for a plastic tube b to be drawn into the inner cavity of the tube is provided at the axial center of the outer wall surface.

The cap body 2 on the side that fits into one longitudinal end of the main body 1 includes:
A connecting cylindrical portion 21 is formed in a part of its peripheral wall in the shape of a nipple for connecting a filling device d for filling the protective tube a with the filling material c by force-feeding air. The cap body 2, which is fitted onto the end of the protective tube a, is formed with an exhaust port 22 which serves as an air escape port when filling the filling material c into the protective tube a with air. Further, at the end of the main body 1, on the side where the cap body 2 provided with the exhaust ports 22 is fitted, there is a net 10 for preventing the filling material c to be filled from blowing out together with the air. is installed. In addition, when the protection pipe a is laid in the structure of a building, and the structure of the building is made of reinforced concrete, the protection pipe a is used as a pipe to guide the telephone line when pouring concrete to construct the floor structure or wall structure. Similarly, it may be fixed to the structure by embedding it in the concrete.

The plastic tube b is a normal one molded from a soft synthetic resin material, and the pilot cable is passed through it from one end of the protective tube a, which has been fixed and laid in advance to the structure of the building as described above. The piping by drawing it into the protective tube a is the same as the conventional means. However, after the plastic tube b has been drawn into the protective tube a, a filler c is filled into the space W formed between the outer peripheral surface of the plastic tube b and the inner wall surface of the protective tube a. Do it like this.

As the filler c, particles made of a very light material that floats in the wind, such as particles of perlite or expanded polystyrene, are used.

Then, filling the space W with the filler c is as follows:
While blowing air into the protective tube a from the nipple-shaped connecting cylinder 21 provided in the cap body 2, the particles of pearlite or styrofoam are suspended in the air, and the protective tube a is filled with air.

The filling device d is a special machine developed to fill the protective tube a with the filling material c using air as described above. , a coupler 32 is provided which is removably connected to the connecting cylinder part 21 provided on the cap body 2, and the suction port 33 of the ejector 31 is connected to the outlet 35 of the container 34 containing the particles of the filler c. The coupler 32 is connected to the connecting cylinder part 21 provided on the cap body 2 of the protective tube a, and the pressure line 30
By discharging pressure air from the ejector 31, particles of the filler c are sucked in from the suction port 33 of the ejector 31 and sent into the protective tube a together with the pressure air.

When filling with the filler c is completed, the filling device d is removed from the connecting cylinder portion 21 of the cap body 2, and the blind cover 23 is screwed thereon as shown in FIG. 2, thereby completing the piping work.

Next, FIG. 3 shows another embodiment. This embodiment is an example in which the filling material c is filled into the protective tube a by suction of air, and the protective tube a has cap bodies 2 fitted on both ends of the main body 1. However, each nipple-shaped connecting cylinder part 2
1. Then, a suction port of a suction blower or a suction pump P is connected to the connecting cylinder part 21 of the cap body 2, which is fitted to the end of the main body part 1 that is covered by the net body 10, of the cap bodies 2, 2. A coupler 32 provided on the discharge side of the ejector 31 is connected to the other cap body 2 to the connecting cylinder portion 21 provided thereon, and the proximal end of the ejector 31 is opened to the outside air.
The suction port 33 of 1 is connected to a container 34 that accommodates the filling material c.
The ejector 31 is actuated through the lumen of the protective tube a by the operation of the suction blower or the suction pump P described above, and the filling material c is suctioned into the protective tube a for clogging. It is designed to fit in.

After filling with the filler c, as in the case described above, connect the connecting cylinders 21 provided on the cap bodies 2, 2.
The blind cover 23 is fitted to each of the pipes to form the state shown in Fig. 4, thereby completing the piping work.

[Effects of the Invention] As explained above, the means of the present invention is such that a flexible plastic tube b is drawn into a protective tube a that is laid in advance in a building structure, and then the inside of the protective tube a is piped. The piping work is completed by filling the space W surrounding the plastic tube B with a filler c made of particles such as perlite or styrofoam from one end of the protective tube a. The plastic tube b, which is the piping for hot water and water supply that has been completed, is surrounded on the outer periphery by the filling material c that is tightly packed inside the protective tube a, so that its movement is sealed, and the water supply and hot water supply pipes are Even if it moves due to sudden pressure fluctuations due to the water hammer phenomenon when the protection tube A stops, the movement is buffered by the large number of particles of the filler c surrounding the outer periphery. This completely prevents the impact noise caused by the plastic tube b hitting the plastic tube b.

The filler c, which seals the movement of the plastic tube b and buffers sudden movements, is stuffed into the protective tube a by compressing air after the plastic tube b is drawn into the protective tube a. Because of this, plastic tube b
It does not cause any hindrance to its own piping work.

In addition, since this filler c is sucked out together with the air by reverse suction from the connecting cylinder part 21, which is the inlet port into which air is sent into the protective tube a, it is necessary to replace the plastic tube b.
It does not cause any problems in maintenance such as inspection.

In addition, the protective tube a has cap bodies 2, 2 provided at both ends of its long side, one of which is provided with a connecting cylinder part 21 which serves as an air inlet, and the other cap body 2. Since the is provided with an exhaust port 23 or a connecting cylinder part 21, by pumping or suctioning air from the connecting cylinder part 21 provided in this cap body 2, the inside of the protective tube a after the plastic tube b has been drawn is removed. The filler c can be easily packed with air, and the packed filler c can be easily taken out during maintenance.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view of the means of the present invention in the middle of piping work, Fig. 2 is a longitudinal side view of the same piping work completed, and Fig. 3 is a longitudinal side view of another embodiment in the middle of piping work. FIG. 4 is a longitudinal sectional side view of the same piping work completed. Explanation of drawing symbols P...Suction pump, W...Space,
a...Protection tube, b...Plastic tube, c...Filling material, d...Filling device, 1...Main part, 10...Mesh body,
2... Cap body, 2a... Vinyl tape, 20...
Outlet port, 21...Connection cylinder part, 22...Exhaust port, 23...
Blind lid, 30...pressure source, 31...ejector, 32...
Cup puller, 33... Suction port, 34... Container, 35...
Outlet.

Claims (1)

[Claims] 1. In a protective pipe a laid in advance in the structure of a building,
A flexible plastic tube b is drawn in and piped, and then a filler c made of particles such as perlite or styrofoam is placed in a space W surrounding the plastic tube b in the protection tube a.
A sheath pipe construction method for hot water and water supply, characterized by filling the protection pipe a with air from one end side. 2 Cap bodies 2, 2 are provided at both ends of the protective tube a in the longitudinal direction, which are laid in advance in the structure of the building so that the plastic tube b is inserted thereinto, and the cap body 2 provided at one end is ,
A connecting cylinder part 21 is provided which serves as an inlet for feeding the filler c made of particles such as pearlite or styrofoam into the protective tube a by air, and the cap body 2 provided at the other end is provided with an exhaust port 23 or a connection part. A protection pipe for sheath pipe type hot water/water supply piping, which is provided with a cylindrical part 21.