JPH0571686A - Noise absorbing drainage pipe - Google Patents

Abstract

PURPOSE:To provide a drainage pipe which does not generate a large flowing noise of the drainage when the drainage flows therein. CONSTITUTION:A drainage pipe is made of at least three layers. An inner layer is a hard synthetic resin pipe 1. An intermediate layer is composed of a lead plate, a lead fiber 21, or a resin sheet including lead. An outer layer is composed of a metal pipe 3. The three layers are integrated to each other by drawing the metal pipe 3 as the outer layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe. More specifically, the present invention relates to a drainage pipe having an advantage that noise of water generated when wastewater falls in a pipe is attenuated or eliminated, and that drainage can be performed quietly.

[0002]

2. Description of the Related Art In old buildings, cast iron pipes were used for drainage. However, cast iron pipes have poor water flow,
It is very heavy and difficult to construct, and it is impossible to reduce the weight of the building.
There was a drawback. For this reason, synthetic resin pipes, particularly pipes made of hard vinyl chloride resin, have come to be used for drainage instead of cast iron pipes.

However, the synthetic resin pipe has a drawback in that when the wastewater flows into the synthetic resin pipe, the sound of the wastewater flowing through the pipe reverberates to the outside. This drawback is especially noticeable when draining water in a condominium at night. Therefore, apartments were requested to refrain from draining at night, and sometimes draining at night was prohibited. However, having to refrain from draining at night is a pain for the people living in the apartment.

Therefore, in order to attenuate the drainage noise, the existing hard synthetic resin pipe has been fixed with concrete or surrounded by glass wool so far. However, this was not enough. Recently, a lead plate has been wound around the outer wall of a hard synthetic resin tube. More recently, since resin sheets containing lead fibers have been sold, lead-fiber-containing resin sheets are used instead of lead plates, and this resin sheet is used outside existing hard resin pipes. Alligator winding was done. It was said that winding the lead in this way was effective for noise reduction.

However, the silencing process using lead is only performed on the existing pipe. The reason is that if a lead plate or a resin sheet containing lead fibers is fixed to a hard resin tube in advance, it becomes difficult to connect the tubes to each other. That is, if a lead plate or a lead-containing resin sheet is releasably wound around a resin tube, it makes no sense to peel it off during handling, and if it is wound so as not to be peeled off easily, This is because it will be difficult to connect the pipes that have made the connection. Therefore, although it has been known that the use of lead can provide a sound deadening effect, the lead plate or the lead-containing resin sheet is not wound around the resin pipe from the beginning, and therefore a sound deadening drainage pipe is not provided. It was

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sound-deadening drainage pipe and to provide a sound-deadening effect by simply piping the drainage pipe.

[0007]

The inventor of the present invention wound a lead plate or a lead-containing resin sheet around a synthetic resin pipe without using an adhesive or the like, and wound the wound product in an aluminum hype. It was inserted and an aluminum pipe was drawn and an attempt was made to form an integral composite pipe. Then, in the obtained composite pipe, the synthetic resin pipe and the aluminum pipe are integrated by sandwiching the lead plate or the lead-containing resin sheet, and as a result, they are not easily separated, and aluminum is located on the surface. Therefore, they have found that they are strong and stable like ordinary aluminum pipes and are easy to handle.

In this composite pipe, the outer aluminum pipe and the lead plate or the lead-containing resin sheet located in the middle can be easily cut with a saw or the like. Therefore, the aluminum pipe and the lead plate or the lead-containing resin sheet can be easily cut. It has been found that the resin sheet can be easily removed. Therefore, it has been found that this composite pipe can be easily connected just by cutting as described above, as in the case of a conventional mere synthetic resin pipe. As a result, they have found that this composite pipe can be a sound deadening pipe that is easy to connect.

In addition, it was confirmed that a cloth woven by using lead fibers could be used in place of the lead plate for this composite pipe. It was also confirmed that a non-woven fabric made of lead fibers could be used. Furthermore, as the lead-containing sheet, it was confirmed that a sheet obtained by solidifying a non-woven non-woven fabric with a resin to form a sheet can be used instead of the above-mentioned knitted fabric. The present invention has been completed based on such knowledge and confirmation.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a lead plate, a lead fiber cloth, a lead fiber non-woven cloth, or a resin sheet containing a lead fiber cloth or non-woven cloth is wound around the outer surface of a hard synthetic resin pipe, and the wound product is The present invention provides a sound-damping drainage pipe which is inserted into a metal pipe, pressure is applied to the outer surface of the pipe to reduce the inner diameter of the pipe, and these are integrated.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the sound deadening drainage pipe according to the present invention will be described with reference to the drawings as follows. 1 is a partially cutaway perspective view of a sound deadening drainage pipe according to the present invention, FIG. 2 is a partially cutaway perspective view of another sound deadening drainage pipe according to the present invention, and FIG. FIG. 6 is a perspective view of a pipe showing a process of connecting the sound-draining drainage pipes according to the present invention.

The sound deadening drainage pipe according to the present invention is shown in FIG.
As shown in FIG. 3, a resin sheet 2 containing lead is wound around the outer surface of the hard synthetic resin pipe 1, and the wound product is made into a metal pipe 3.
It is made by inserting it into the inside of the pipe and pulling out the pipe 3 to integrate them. The drawing process is to reduce the inner diameter of the pipe 3 by drawing the pipe 3 through the die. In this way, the pipe 1 and the sheet 2, and the sheet 2 and the pipe 3 are not adhered to each other by an adhesive, but are integrated by mutual close contact.

As the hard synthetic resin pipe 1, the one that has been used as a drainage pipe can be used as it is. That is, a hard vinyl chloride pipe, an iron pipe lined with a vinyl chloride resin, or the like can be used. These pipes can be easily connected by sleeve connections or by means of fittings and have hitherto been used as drainage pipes.

As the material wound around the outer surface of the hard synthetic resin tube 1, various materials can be used instead of the above-mentioned resin sheet 2 containing lead. For example, a lead plate, a lead fiber, a woven fabric of lead fibers, or a non-woven fabric made of lead fibers can be used. Resin sheet containing lead 2
Is a sheet formed by solidifying, for example, lead powder, lead particles, a matte or non-woven fabric made of lead fiber with a soft vinyl chloride resin. As the resin, in addition to vinyl chloride resin, various resins such as polyethylene and polybutene can be used.

When the outer surface of the hard synthetic resin pipe 1 is a lead fiber or tape-shaped lead plate made of lead, as shown in FIG.
The lead fiber or plate 21 may be spirally wound, as shown in FIG. In FIG. 2, the fiber or plate 21 is shown to be wound in a single layer, but it may be wound in a double or more layers. When they are overlapped in a double layer, it is preferable that the inner and outer fibers are wound so that the spiral directions are different.

When the lead-containing resin sheet 2 to be wound is a wide and long one, it is cut so that the outer surface of the hard synthetic resin tube 1 can be wound in a single or double or more. A sheet may be used, which may be wound around the outer surface of the synthetic resin tube 1. When wound, it is preferable to temporarily stop the end of the sheet exposed on the outer ring with an adhesive tape. As the lead-containing resin sheet 2, those sold by Toray Industries, Inc. under the trade name of “soundproof material FC” can be used.

As the metal pipe 3, an aluminum pipe is suitable, but an iron pipe can also be used.
Besides, both copper pipes and brass pipes can be used, but these pipes are expensive, which is not economically advantageous.

The thicknesses of the hard synthetic resin tube 1, the lead-containing layer 2 and the metal pipe 3 are as follows. The thickness of the resin pipe 1 is the same as that used for drainage. The thickness of the lead-containing layer 2 is approximately 1/4 or more and 1 / half or less of the thickness of the resin tube 1. The thickness of the metal pipe 3 is not more than half the thickness of the resin pipe 1 and the thickness of the lead-containing layer 2.

The sound deadening drainage pipe according to the present invention is shown in FIG.
However, the lead-containing resin sheet 2 located in the middle may be double-layered to form a plurality of layers. Further, a layer of paper or the like may be interposed between the lead-containing resin sheet 2 and the metal pipe 3 to form a total of four layers. Further, it may have four or more layers.

The sound deadening drainage pipe according to the present invention can be easily connected as follows. That is, first, the metal pipe 3 is cut off at a position slightly separated from the pipe end of the sound deadening drainage pipe. Then, since the metal pipe 3 and the lead-containing resin sheet 2 are only integrated by the drawing process of the metal pipe 3, the metal pipe 3 can be easily peeled from the sheet 2. Similarly, the sheet 2 can be easily peeled from the hard synthetic resin tube 1. Thus, as shown in FIG. 3, the hard synthetic resin pipe 1 can be exposed at the end. In this state, since the end is composed of only the hard synthetic resin pipe 1, it can be easily connected by the conventional connecting method of the hard synthetic resin pipes. After that, the lead-containing resin sheet 2 may be wound around the exposed resin pipe, if necessary.

[0021]

EFFECTS OF THE INVENTION The sound deadening drainage pipe according to the present invention, when the metal pipe is appropriately drawn, has a hard synthetic resin pipe as the innermost layer, so that the whole is firmly integrated. Therefore, this drainage pipe is not likely to be decomposed even if it is handled roughly, and therefore can be used as a resin-lined metal pipe. Moreover, since the lead plate, the lead fiber, the lead fiber cloth, or the resin sheet containing the lead fiber is interposed between the metal pipe and the resin pipe, this suppresses the vibration of the pipe at the time of drainage, and the sound deadening Therefore, the drainage pipe does not generate much noise due to the flow of the wastewater even when the wastewater is passed into the pipe. Therefore,
It is useful as a sound deadening pipe. Nevertheless, this sound-deadening drainage pipe is easy to connect as mentioned above. Therefore, by using this sound deadening drainage pipe, it is possible to easily make the drainage pipe sound deadening. Further, since the metal pipe is located on the outer surface, the lead-containing intermediate layer is protected by this, and the drainage pipe is strengthened as a whole. The present invention provides such advantages.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a sound deadening drainage pipe according to the present invention. FIG. 2 is a partially cutaway perspective view of another sound deadening drainage pipe according to the present invention. FIG. 3 is a perspective view of pipes showing a process of connecting the sound deadening drainage pipes according to the present invention to each other. In the figure, 1 is a hard synthetic resin pipe, 2 is a resin sheet containing lead, 21 is lead fiber, and 3 is a metal pipe.

Claims (1)

[Claims] 1. A lead plate, a lead fiber, a cloth of lead fibers, or a resin sheet containing lead fibers is wound around the outer surface of a hard synthetic resin pipe, and the wound product is inserted into a metal pipe to form a pipe. A sound-damping drainage pipe made by integrating pressure by applying pressure to the outer surface of the pipe to reduce the inner diameter of the pipe.