JPH0678695U - Double piping structure - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the generation of abnormal noise due to vibration caused by the water hammer effect of the water and hot water supply plastic pipe laid as a double pipe structure. [Structure] A non-woven fabric layer 2 is provided on an inner surface of a sheath pipe 1 which is laid in advance along a floor surface f and a wall surface w of a building, and a plastic pipe 3 for supplying water and hot water is inserted into the sheath pipe 1. With the configuration, the non-woven fabric layer 2 buffers the shock caused by the vibration of the plastic tube, and the generation of abnormal sound can be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a double pipe structure in which a plastic pipe for supplying water and hot water is inserted into a sheath pipe.

[0002]

[Prior art]

 In order to install a plastic pipe for water and hot water as a double pipe structure, pods are laid in advance along the floor and wall surfaces of the building, and water is supplied from the header (distributor) side in the pod. Insert the plastic tube toward the stopper (hereinafter referred to as the water tap). Then, a method is adopted in which the tip of the plastic pipe that comes out of the sheath pipe is connected to a water tap, and while this water tap is set and fixed in place, the base end of the plastic pipe is connected to the header side. .

[0003]

[Problems to be solved by the device]

 Since the plastic pipes piped in this way are not fixed inside the sheath pipes, when the water tap (faucet for water or hot water) is suddenly closed, the plastic pipes vibrate due to the water hammer action, and the vibrated plastic pipes are vibrated. Strikes the inner wall surface of the scissors pipe and produces an abnormal sound together with the water hammer sound. The generation of this abnormal sound gives discomfort and suspicion, and improvement measures are required. Therefore, an object of the present invention is to provide an improved double piping structure capable of preventing the generation of abnormal noise due to the water hammer effect.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the double piping structure, which is a feature of the present invention, is provided with a non-woven fabric layer on the inner surface of a sheath pipe laid along the floor or wall surface of a building. It is made by inserting a plastic tube.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to FIGS. 1 to 3 of the accompanying drawings. FIG. 3 shows an example of a double piping structure at the rising portion on the water supply / hot water tap side, and this double piping structure example has already been proposed by the applicant as Japanese Patent Application No. 3-349308. A sheath pipe 1 is laid along the floor surface f and the wall surface w of the building, and a plastic pipe 3 is inserted into the sheath pipe 1. The invention of the present application comprises a sheath layer 1 provided in advance with a non-woven fabric layer 2 on the inner surface thereof for the purpose of cushioning.

In the case shown, the plastic tube 3 is single, but it can also be implemented as a reciprocating double tube. For the sheath tube 1, for example, a corrugated tube made of polyvinyl chloride, which has a continuous or discontinuous corrugated shape, is used, and the non-woven fabric layer 2 is coated with an adhesive on the inner surface of the sheath tube 1, for example. It is preferably formed by a so-called electric flocking method in which short fibers such as saturated polyester, nylon, propylene, and vinylon are electrically flocked.

In the example of the double piping structure shown in FIG. 3, the nonwoven fabric layer 2 is provided on the inner surface. The tube 1 is fixed to the floor surface f and the wall surface w by using fixtures 4 and 5. On the other hand, the tip of the plastic pipe 3 protruding from the rising portion of the sheath 1 is connected to the fitting 6 on the side of the water tap (for example, faucet). The middle portion 1a of the rising portion of the sheath 1 is curved in a direction away from the wall surface w, and the curved portion is supported by the support 7 and fixed to the wall surface w.

Therefore, the plastic tube 3 is forcibly curved following the curved sheath tube 1 as shown in the figure, and the contact points with the sheath tube 1 are a, b, and c. As a result, the plastic pipe 3 is apparently locked at the three places inside the rising part, which has the effect of suppressing the vibration due to the water hammer action. In the conventional case, the contact point of the plastic pipe 3 is sheathed. Either one inside or outside the curved part of the tube 1.

[0009]

[Effects of the Invention] The present invention is as described above, and by providing a non-woven fabric layer on the inner surface of the sheath, it is effective to generate an impact sound between the sheath and the pipe due to vibration of the plastic pipe due to water hammer operation. This is effective in eliminating discomfort and suspicion when operating the water supply / hot water tap.

[Brief description of drawings]

FIG. 1 is an AA of FIG. 3 showing a double piping structure according to the present invention.
It is a line sectional view.

FIG. 2 is a perspective view showing the one shown in FIG.

FIG. 3 is a side view showing a piping example of the one shown in FIG. 1 with a part thereof cut away.

[Explanation of symbols]

1 is a sheath tube, 2 is a non-woven fabric layer, 3 is a plastic tube, f is a floor surface, w is a wall surface

Claims (1)

[Scope of utility model registration request] 1. A double structure characterized in that a non-woven fabric layer is provided on an inner surface of a sheath pipe laid along a floor or wall surface of a building, and a plastic pipe for supplying water and hot water is inserted into the sheath pipe. Piping structure.