JPH05306796A - Silencing pipe - Google Patents

Abstract

PURPOSE:To obtain a sufficient silencing effect with only the piping, and enable the connection to be equally simple to the conventional drain pipe by forming a pipe, which consists of a hard resin pipe and an intermediate layer and an iron group metal pipe, and making the intermediate layer of the soft inorganic material, and pinching the intermediate layer between the iron group metal pipe and the hard resin pipe to be formed integrally with the reduction of the inner diameter of the iron group metal pipe. CONSTITUTION:This silencing pipe consists of a hard resin pipe 1 forming the inner surface, an iron group metal pipe 3 forming the outer surface, and an intermediate layer interposed between them, and the thickness of the intermediate layer 2 is set equal to or smaller then the thickness of the hard resin pipe 1. The intermediate layer 2 is formed by rolling the inorganic fiber, the soft sheet including inorganic material powder or inorganic fiber, or the inorganic material plate softer than the hard resin pipe, and as the inorganic component, the inorganic component having specific gravity of 3 of more is used, and the intermediate layer 2 is formed so as to be integrated by the reduction of the inner diameter of the iron group metal pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound deadening pipe.

A sound deadening pipe means a pipe having a property of reducing noise. More specifically,
A sound deadening pipe is, for example, a pipe used as a drainage vertical pipe, and when the wastewater is poured into the pipe and the wastewater is dropped, the noise of the generated water is attenuated or disappeared so that the water can be gently drained. It is a pipe.

[0003]

2. Description of the Related Art In old buildings, cast iron pipes were used for drainage. However, cast iron pipes have drawbacks such as poor flow of water and heavy construction which makes it difficult to construct and the weight of the building cannot be reduced. Therefore, instead of a cast iron pipe, a hard synthetic resin pipe or a steel pipe lined with a hard vinyl chloride resin has been used for drainage. Among the hard synthetic resin tubes, particularly hard vinyl chloride resin tubes were used.

However, a steel pipe lined with a hard synthetic resin pipe or a hard vinyl chloride resin is used as a drainage vertical pipe, and when the wastewater is dropped through this pipe, the sound of the wastewater flowing makes a big noise. Indicated. Therefore, in the apartment, there is a demand for refraining from drainage at night, and sometimes drainage at night is prohibited. Thus, it is a pain for the people living in the condominium to have to suppress the drainage at night. Therefore,
There was a demand for the emergence of drainage pipes, that is, sound deadening pipes, so that the drainage noise does not resonate significantly outside.

Attempts to attenuate the drainage sound have already been made in existing buildings. For example, an attempt was made to surround the existing drainage pipe made of hard vinyl chloride resin with glass wool to attenuate the drainage sound. However, this did not provide a sufficient silencing effect. Therefore, a lead plate was wound instead of glass wool. Recently, various materials have been provided as sound deadening materials in place of lead plates. Therefore, it was attempted to attach such a sound deadening material to an existing drainage pipe. For example, a resin sheet containing lead fibers or a resin sheet containing iron oxide powder or coal powder was provided as a sound deadening material, so it was attempted to cover the existing drain pipe with these sound deadening materials to obtain a sound deadening effect. Was tried. However, the attempt was only made on the existing drainage pipe. Moreover, the implementation of the trial was extremely difficult.

The resin sheet containing lead fibers is made by forming a lead wire using lead as a material, arranging the lead wire in a non-woven fabric shape, sandwiching this between soft vinyl chloride resin sheets, and integrating them in a sandwich form. is there. The resin sheet containing iron oxide powder is a sheet in which a large amount of iron oxide powder is kneaded with vinyl chloride resin to form a sheet, and a reinforcing material is added thereto. Organic or inorganic fibers were used as the reinforcing material. In addition, barite powder, that is, powder of salts such as barium sulfate added to the resin to form a sheet was also provided as a sound deadening material. Such a thing was called a sound deadening sheet. When the muffling sheet was wound around a synthetic resin drainage pipe, a certain muffling effect was obtained.

Attempts to dampen the drainage sound have only been made to existing drainage stacks as described above. In other words, pipes that have already been silenced before piping and can be immediately silenced by laying it have never been provided. The reason is that the dimensions of the pipe are standardized, and if the above-mentioned sound deadening sheet is blindly wound around the standardized pipe, it will provide a nonstandard pipe. is there. The reason is that if the pipe is out of the standard, the conventional joint cannot be used for the connection, and the laying is not easy.

[0008]

SUMMARY OF THE INVENTION The present invention seeks to provide a sound deadening pipe. That is, the present invention is intended to provide a sound deadening pipe that does not require a sound deadening process later and can obtain a considerable sound deadening effect by simply piping. Moreover, this invention
The purpose of the present invention is to provide a sound deadening pipe that can be easily connected to the conventional drain pipe by using the conventional fitting.

[0009]

The inventor investigated the sound deadening effect of a sound deadening pipe obtained by using a hard resin tube as an inner layer and winding a sound deadening sheet around it. At that time, the sound deadening effect was examined by variously changing the thicknesses of the hard resin tube and the sound deadening sheet. As a result, it has been found that the muffling sheet exhibits a considerable muffling effect only by winding the muffling sheet to a thickness equal to or less than the thickness of the hard resin tube.

Further, when the present inventor winds the sound deadening sheet around the outer wall of the hard resin pipe and does not leave the sound deadening sheet left exposed, if the iron-based metal pipe is coated thereon, I have found that it is advantageous in various ways. For example, it has been found that coating an iron-based metal pipe improves the aesthetics and prevents the muffling sheet from peeling off, so that it is easy to handle and has an advantage in disaster prevention.

Further, the inventor of the present invention can easily reduce the inner diameter of the iron-based metal pipe by making it thin and then pulling it out through a die, and the softening of the sound deadening sheet located thereunder. It has been found that depending on the property, the whole can be easily integrated without damaging the hard resin pipe. In addition, when the iron-based metal pipe is thinned in this way, the resulting sound deadening pipe is called a drain joint, despite the addition of a sound deadening sheet between the iron-based metal pipe and the hard resin pipe. It has been found that the conventional cast iron drainage pipe fittings can be used to connect sound-deadening pipes to each other. The present invention has been completed based on such knowledge.

The present invention comprises a hard resin pipe forming the inner surface, an iron-based metal pipe forming the outer surface, and an intermediate layer interposed therebetween, and the thickness of the intermediate layer is equal to the thickness of the hard resin pipe or Smaller than this, the intermediate layer is made by winding an inorganic fiber, a soft sheet containing inorganic powder or inorganic fiber, or an inorganic plate softer than the hard resin, and the inorganic material has a specific gravity of 3 or more. The intermediate layer is sandwiched between the iron-based metal pipe and the hard resin pipe by the reduction of the inner diameter of the iron-based metal pipe to be integrated with each other. It is a thing.

The present invention will be described with reference to FIG.
It is as follows. The sound deadening pipe according to the present invention,
A sound absorbing sheet is wound around the outer surface of the hard resin tube 1 to form the intermediate layer 2
And the thickness of the intermediate layer 2 is made equal to or smaller than the thickness of the hard resin tube 1 to make a composite of the hard resin tube 1 and the intermediate layer 2. At this time, the hard resin pipe 1
It is necessary to have a shape that itself retains a tubular shape and is not deformed by winding the sound deadening sheet. In addition, among them, the hard resin tube 1 is selected so that its thickness is as small as possible.

Next, the above-mentioned composite material is added to the iron-based metal pipe 3
The thickness of the iron-based metal pipe 3 is made smaller than that of the hard resin pipe 1 at that time. In this state, the iron-based metal pipe 3 is drawn to reduce the inner diameter of the pipe 3. Thus, the soundproof pipe according to the present invention is one in which the hard resin pipe 1 is integrated with the iron-based metal pipe 3 with the intermediate layer 2 interposed therebetween.

In this sound deadening pipe, an adhesive may or may not be applied between the hard resin pipe 1 and the intermediate layer 2.
Similarly, an adhesive may or may not be applied between the intermediate layer 2 and the iron-based metal pipe 3. Also when applying the adhesive, the adhesive does not have to be strong. This is because the spaces between them are integrated by closely contacting each other due to the reduction of the inner diameter of the iron-based metal pipe 3.

In FIG. 1, a sound deadening sheet is used to form the intermediate layer 2, the sound deadening sheet is formed into a tape shape, and the length direction of the tape is aligned with the pipe axis direction of the hard resin pipe 1 to form a hard resin. It was adapted to be wound around the tube 1. However, the method of forming the intermediate layer 2 is not limited to that shown in FIG. Figure 2
As shown in, the sound deadening sheet may be formed into a narrow tape shape and wound around the hard resin tube 1 in a spiral shape. In addition, in order to form the intermediate layer 2, the lead fiber or the lead wire 4 is directly spirally wound around the hard resin tube 1 to form the intermediate layer 2
May be formed.

As the hard resin pipe 1, one which has been used as a drainage pipe up to now is used as it is or with a thickness smaller than that. As the material, hard vinyl chloride,
Polyethylene, polypropylene, polybutene, etc. can be used. The hard resin pipe 1 has a slightly different thickness depending on the material, but the pipe in which drainage noise is a problem usually has a nominal diameter in the range of 40 mm to 125 mm. Then, the thickness of the tube changes only with the size of the nominal diameter, and does not change significantly with the material. This is because the thickness of the hard resin pipe 1 is determined to be as small as possible on the basis of whether or not the shape of the pipe itself can be maintained. Its thickness is
It is usually within the range of 2.2 mm to 4.3 mm.

Various materials can be used to form the intermediate layer. For example, the sound deadening sheet as shown in FIGS. 1 and 2 and the lead wire 4 as shown in FIG. 3, that is, the inorganic fiber can be used. Also,
A lead plate can be used. Further, as shown in FIG. 4, glass fibers or lead fibers are irregularly arranged on one plane to form a nonwoven fabric 51, which is soft resin sheet 5
It is also possible to use a sheet-like material sandwiched between the two. In addition, as shown in FIG. 5, a sheet in which the inorganic powder 53 is included in the soft resin 54 can be used.

The term "soft resin" means that it is softer than the resin forming the hard resin tube 1. As the soft resin, soft vinyl chloride resin, low density polyethylene, ethylene / vinyl acetate copolymer, synthetic rubber or natural rubber can be used.

The inorganic substances generally include lead, iron, rock, glass and the like having a large specific gravity. Therefore, the inorganic powder, lead powder, iron powder, iron oxide powder, barite powder,
For example, glass powder. The large specific gravity means that the specific gravity is 3 or more, usually 4 or more, and preferably 5 or more. When the inorganic fiber or the inorganic powder is solidified with a resin to form a sheet, it is necessary to increase the content ratio of the inorganic material as much as possible. The proportion of minerals is required to be 50% by weight.

A sound deadening sheet 5 having a structure as shown in FIG.
Is already on the market. For example, a lead fiber non-woven fabric 51
Sandwiched by a sheet 52 of soft vinyl chloride resin,
The structure shown in FIG. 4 is sold by Toray Industries, Inc. under the product name of “soundproof material FC”. In the present invention, such commercially available products can be used. In FIG. 4, the non-woven fabric 51 is made of lead fibers, but the lead fibers may be woven as warp and weft to form a woven fabric.

The sound deadening sheet 5 as shown in FIG. 5 is already on the market. The sound deadening sheet 5 is a soft vinyl chloride resin sheet containing a large amount of the inorganic powder 53 having a large specific gravity. A large amount means that the inorganic powder occupies 50% by weight or more in the whole sheet. Among them, 55% by weight or more is preferable, and 60% by weight or more is more preferable.

The sound deadening sheet 5 shown in FIG. 5 is produced, for example, as follows. One method is to first make a soft vinyl chloride resin film 54 that does not contain inorganic powder or contains little if any, and spray the inorganic powder 53 between the resin films 54, and then The films 54 are bonded together by heating or an adhesive material to be integrated into the sound deadening sheet 5.
In this case, it is preferable to thinly coat the inorganic powder with an adhesive or a resin in advance. In another method, first, a soft vinyl chloride resin and an inorganic powder are well kneaded and molded into a sheet. The sheet thus formed contains a large amount of inorganic powder, and therefore has poor tensile strength. Therefore, a reinforcing material is added to this sheet. As the reinforcing material, a fiber or a non-woven fabric is used, and this is attached to one side or both sides of the sheet to form the sound deadening sheet 5.

The commercially available silencer sheet 5 shown in FIG.
There are the following: One is sold by Plastec Co., Ltd. under the product name of "Sound Sticker", and the other is sold by Nichias Co., Ltd.
Are sold under the brand name. In this invention,
Any of these commercially available products can be used. The "sound seal" uses ferrous oxide powder having a specific gravity of 5.7 as the powder, vinyl chloride resin as the softening resin, and fiber or nonwoven fabric as the reinforcing material. It is being appreciated. It is said that the "sharon sheet" is a soft vinyl chloride resin sheet containing a large amount of barite powder. Barite has a barium sulfate as a main component and a specific gravity of 4.5, which is a large specific gravity among nonmetallic compounds.

As the iron-based metal pipe, a steel pipe such as a drawn pipe, an electric resistance welded pipe, a welded pipe, and a stainless pipe can be used. Since the ratio of the thickness to the hard resin pipe is slightly different between the case of using the steel pipe and the case of using the stainless pipe, each case will be described in detail below.

First, when a stainless steel pipe is used, for example, a hard vinyl chloride pipe 1 having an outer diameter of 45.2 mm and an inner diameter of 39.2 mm is used to make a sound deadening pipe having a nominal diameter of 40 mm. The thickness of this hard resin tube is 3 mm. FC # 1050 from Toray Industries, Inc. around this tube 1
The sound deadening sheet 2 having the product name is wound to a thickness of 1.3 mm, and a stainless steel tube having a thickness of 0.4 mm is integrally formed with the sound deadening sheet to form a sound deadening sheet. Therefore, the thickness ratio of the hard vinyl chloride pipe, the sound deadening sheet and the stainless pipe is a ratio of 3: 1.3: 0.4. On the other hand, the nominal diameter is 12
To make a 5 mm sound deadening pipe, the ratio of the thickness of the hard vinyl chloride pipe, the sound deadening sheet, and the stainless steel pipe is set to 2.
The ratio is 5: 1.3: 0.4.

Next, when a drawn pipe is used, a thickness of 2.3 mm is required to make a sound deadening pipe having a nominal diameter of 40 mm.
Using a hard vinyl chloride pipe manufactured by Toray Industries Co., Ltd., a sound deadening sheet with a trade name of FC # 1050 from Toray Industries, Inc. having a thickness of 1.
It is wound to 4 mm, and a drawn steel pipe is crimped on the outside to make the thickness of the steel pipe 1.0 mm. Therefore, rigid vinyl chloride,
The thickness ratio of the muffling sheet and the steel pipe is about 2.3 to 1.
The ratio is 4 to 1.0. On the other hand, the nominal diameter is 125
In order to make a sound deadening pipe of mm, the thickness ratio of the hard vinyl chloride pipe, the sound deadening sheet and the steel pipe is 3.6: 1.4: 1.
The ratio is 0.

In summary, the sound deadening pipe according to the present invention has the following thickness relationship. Based on the thickness of the hard resin pipe 1, when the stainless pipe is used as the iron-based metal pipe, the thickness of the intermediate layer is within the range of 30% to 45% of the thickness of the resin pipe 1. Is in the range of 5% to 15% of the thickness of the resin pipe 1. When a steel pipe such as a drawn pipe is used as the iron-based metal pipe, the thickness of the intermediate layer is 3 times that of the resin pipe 1.
It is in the range of 5% to 70%, and the thickness of the steel pipe is 1
The thickness is within the range of 26% to 60%. From this, the thickness of the intermediate layer is 30% to 70% of the thickness of the resin pipe 1.
Within the range, the thickness of the iron-based metal pipe is 5% to 60%
It is said that it is within the range of.

In order to make the sound deadening pipe according to the present invention,
First, the intermediate layer 2 is provided around the hard resin pipe 1 to the above-mentioned thickness, and then the hard resin pipe with the intermediate layer thus obtained is put into the iron-based metal pipe 3. At this time, the inner diameter of the iron-based metal pipe 3 is set to be slightly larger than the outer diameter of the intermediate layer 2 so that the hard resin pipe with the intermediate layer can barely enter the iron-based metal pipe. After that, pressure is applied to the outer surface of the iron-based metal pipe 3 to reduce the inner diameter of the pipe 3. For this purpose, it is suitable to draw the iron-based metal pipe 3, but it is not limited to this. The drawing process is preferable because the inner diameter of the pipe 3 can be uniformly reduced. The inner diameter of the pipe 3 may be partially reduced and for this the pipe 3 may be partially recessed.

Although the sound deadening pipe according to the present invention is shown as having three layers in FIGS. 1 to 3, it is not limited to three layers. When the intermediate layer 2 has a thickness of 70% or less of the thickness of the resin pipe and the iron-based metal pipe 3 has a thickness of 60% or less, a layer of another material can be interposed in the insufficient portion. Other materials can be paper, foamed resin layers, soft cushion layers, air layers, and the like. When forming an air layer, it is necessary to insert a ring-shaped spacer made of a hard material in some places.

The sound deadening pipe according to the present invention can be used as a conventional cast iron drain pipe joint and easily connected as described below. FIG. 6 is a partially cutaway side view showing a connection state of the sound deadening pipe according to the present invention with a joint. In FIG. 6, the sound deadening pipes A and B according to the present invention are connected by a conventional cast iron drain pipe joint X. That is, the pipes A and B are the hard resin pipes 1,
When the pipes A and B are composed of the intermediate layer 2 and the iron-based metal pipe 3, the outer diameter of the iron-based metal pipe 3 can be directly inserted into the end of the joint X. Is closely fixed to the rubber ring Y fitted at the end of the. In particular, the rubber ring Y has an inner surface having a moderately high taper along the axial direction of the joint, and is itself flexible, so that it can cope with expansion and contraction of the outer diameter of the iron-based metal pipe 3. There is. Also, rubber ring Y
The expansion of the inner diameter of the can be adjusted by adjusting the nut Z or by exchanging the rubber ring Y.
Thus, the sound deadening pipe according to the present invention can be inserted into a conventional cast iron drain pipe joint. At this time, the inner surface of the sound deadening pipe is flush with the inner surface of the joint due to the thickness of each layer.

[0032]

According to the present invention, since the inner surface is made of the hard resin pipe, the flow of water is good and it does not corrode. Therefore, it is possible to smoothly drain water for a long period of time. In addition, since the outer surface is made of iron-based metal pipes, it has a beautiful appearance and is easy to handle, and in the event of a fire, the iron-based metal pipes retain their shape up to 1400 ° C, so the drainage pipe disappears prematurely. It is possible to prevent it from becoming a flame passage, which is advantageous for disaster prevention. Furthermore, an intermediate layer is provided between the hard resin pipe and the iron-based metal pipe, and the intermediate layer is an inorganic fiber, a soft sheet containing inorganic powder or fiber,
Or, it is made by winding an inorganic material plate that is softer than hard resin, and the inorganic material is made heavy with a specific gravity of 3 or more, so that the intermediate layer eliminates or reduces the sound of water flowing in the hard resin pipe, and therefore drains sound to the outside. It will not make a big noise.
Further, since the thickness of the intermediate layer is equal to or smaller than the thickness of the hard resin pipe, and the thickness of the iron-based metal pipe is smaller than the thickness of the hard resin pipe, a conventional hard resin-lined iron product is used. Compared with the drain pipe, the increase in the outer diameter of the pipe and the increase in the weight due to the addition of the intermediate layer are not so large. Further, since the thickness of the iron-based metal pipe is made smaller than that of the hard resin pipe, it is possible to easily reduce the inner diameter of the iron-based metal pipe by applying pressure from the outer edge of the metal pipe, and thus the intermediate layer Coupled with the soft material, the iron-based metal pipe can be easily integrated with the hard resin pipe without breaking the hard resin pipe. Moreover, as mentioned above, since the expansion of the outer diameter and the increase of the weight are not so large in this sound deadening pipe, it is possible to insert this sound deadening pipe in the cast iron drain pipe joint that has been used so far. The inner surface of the sound deadening pipe can be made substantially flush with the inner surface of the joint when inserted.
For this reason, it is possible to easily continue using the conventional joint so as not to generate noise. Therefore, the sound deadening pipe according to the present invention is immediately useful as a drainage vertical pipe. The present invention provides such benefits.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a sound deadening pipe according to the present invention.

FIG. 2 is a partially cutaway perspective view of another silencing pipe according to the present invention.

FIG. 3 is a partially cutaway perspective view of still another silencing pipe according to the present invention.

FIG. 4 is a partially cutaway perspective view of a sound deadening sheet that can be used in the present invention.

FIG. 5 is a partially cutaway perspective view of another sound deadening sheet that can be used in the present invention.

FIG. 6 is a partially cutaway side view showing a method for connecting a sound deadening pipe according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hard resin tube 2 Intermediate layer 3 Iron-based metal pipe 4 Inorganic fiber 5 Sound-absorbing sheet, that is, a soft sheet containing inorganic powder or inorganic fiber

Claims (1)

[Claims] 1. A hard resin pipe forming an inner surface, an iron-based metal pipe forming an outer surface, and an intermediate layer interposed therebetween. The thickness of the intermediate layer is equal to or greater than the thickness of the hard resin tube. Is also small, the thickness of the iron-based metal pipe is smaller than the thickness of the hard resin pipe, the intermediate layer is an inorganic fiber, a soft sheet containing inorganic powder or inorganic fiber, or by winding an inorganic plate softer than the hard resin The inorganic material has a specific gravity of 3 or more, and the intermediate layer is sandwiched between the iron-based metal pipe and the hard resin pipe due to the reduction of the inner diameter of the iron-based metal pipe to be integrated. A sound deadening pipe characterized by