JP3391664B2 - Soundproof structure of water supply pipe or hot water supply pipe - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to soundproofing for effectively reducing noise generated by substances passing through pipes.
Regarding the structure . In particular, the present invention relates to a pipe soundproof structure that is effective when there is a difference between the temperature of the substance inside the pipe and the temperature of the air outside the pipe.

[0002]

2. Description of the Related Art In recent years, the heat insulation and airtightness of houses have been advanced, and not only the thermal efficiency indoors has been improved, but also outdoor noise has become difficult to enter indoors. Along with this, the noise generated indoors becomes a jarring sound, and soundproofing materials are rapidly being used for drainage pipes that have not been considered as a problem and have not been addressed, and the use of soundproofing materials is becoming a common sense. .

On the other hand, if the drainage noise is reduced, sound absorption and noise during hot water supply will start to be pointed out. Conventionally, a heat insulating material and a moistureproof material have been used around the drain pipe to prevent freezing in winter and
Condensation is prevented at high humidity. Further, a heat insulating material is surrounded by the hot water supply pipe to prevent loss of thermal energy.

[0004]

Although the present water supply or hot water supply pipe is covered with a heat insulating material, such a heat insulating material does not function as a soundproof material and is not effective for noise during water supply or hot water supply. .

[0005] In a house, a water supply pipe and a hot water supply pipe are often installed side by side, and in recent years, in particular, because of the large number of water supply equipment, the piping path is extremely complicated. Proper use of the soundproof material between the water supply pipe and the hot water supply pipe may cause a construction error, and it is preferable to treat with the same soundproof material as much as possible.

[0006] Further, the pipes are stored in walls, ceilings, floors, etc. after construction and buried in the ground etc. Such pipes are rarely regularly serviced and checked, and serious problems such as water leaks and clogging are caused. It is rarely touched except when a serious problem occurs. Therefore, the soundproof material used for such piping is required to maintain its effect for a long period of time.

The present invention is effective in preventing noise in the water supply pipe,
Moreover, it is an object of the present invention to obtain a pipe soundproof structure that is also effective in preventing noise in the hot water supply pipe.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a sound absorbing material for a pipe which is provided on the outer periphery of the pipe and which can effectively reduce the noise generated from the pipe. This sound absorbing material for piping includes a fibrous material made of an assembly in which fibers are fixed to each other. In the present invention, this fiber contains a bulky fiber, and in the sound absorbing material, the change in the resilience due to the temperature change is suppressed. The present invention relates to water supply or hot water supply piping and piping.
With soundproof material, noise generated from the pipe is reduced
The soundproof structure for water supply or hot water supply
The pipe has a deformed portion and a straight pipe portion adjacent to the deformed portion.
And the straight pipe portion is adjacent to the deformed portion and is near the deformed portion.
The pipe soundproof material fixed the fibers to each other.
The bulky fibrous material composed of aggregates is included as a sound absorbing material.
It suppresses the change in resilience due to temperature changes.
The pipe soundproofing material has the entire outer circumference of the deformed pipe and the inner diameter of the straight pipe as L.
From the end of the deformed pipe to the inflow side of the straight pipe and
Outside the straight pipe in the range of 3L to 9L toward the outflow side
It covers the circumference and the deformed portion and the portion in the vicinity of the deformed portion.
The noise generated in the
It relates to a soundproof structure for water or hot water supply piping. Also,
Ming has water supply or hot water supply pipes and pipe soundproofing,
Water or hot water supply with reduced noise generated from the piping
A pipe soundproof structure, wherein the pipe is
Straight pipe part adjacent to the shape part and support part supported by the skeleton
And the straight pipe portion is adjacent to the deformed portion.
The deformed portion, the support portion, and
The outer periphery of the pipe in the vicinity of the deformed portion is covered with the pipe soundproofing material.
It is covered and the pipe soundproofing material fixes the fibers to each other.
The bulky fibrous material composed of
It suppresses the change in resilience due to temperature changes.
The outer circumference of the pipe soundproofing material of the support part is
It is covered with a fixing member made of highly rigid material.
The fixing member is 2L to 7 with respect to the inner diameter L of the pipe.
The pipe is covered with a length of L, the deformed portion, the
Noise generated in the supporting part and the vicinity of the deformed part is reduced.
It has a soundproof structure for water supply or hot water supply piping.
It is related.

The inventor of the present invention investigated the sound of water supply and the sound of hot water supply using various sound absorbing materials. As a result, it was found that in the water supply pipe, dew condensation occurs on the heat insulating material side due to defective construction or damage of the moistureproof material, and the water supply noise increases. It was also found that general soundproofing materials are easily affected by temperature, and have a low soundproofing effect when used for hot water supply pipes. From this point of view, it is necessary for a soundproof material suitable for a water supply pipe and also usable for a hot water supply pipe to exhibit high soundproof performance even at high temperatures.

The damping material is particularly effective in preventing pipe noise. However, many such damping materials have temperature characteristics and generally have a peak performance at room temperature. In a hot water supply pipe using such a damping material, the noise level of the pipe becomes higher as the temperature around the hot water supply pipe rises.

The inventor of the present invention has developed a sound absorbing material capable of maintaining soundproofing performance from low temperature to high temperature. This sound absorbing material contains a bulky hollow fiber or a conjugate fiber in a fibrous material formed of an assembly in which fibers are fixed to each other. Surprisingly, these fibrous materials maintain a high level of resilience regardless of temperature changes, and exhibit an extremely excellent dynamic vibration absorbing effect.

In recent homes, faucets for water supply equipment are made one-touch, and high water supply pressure is required. Especially in areas with many dwellings on the slopes, there may be a large difference in water supply pressure. For this reason, the water supply pressure is about 9 kgf / cm ² in some areas, and noise is generated due to the high water supply pressure.

In order to eliminate such noise, the present inventor has
A survey was conducted on the location of noise generation in the water supply and hot water supply pipes and the frequency of noise that should be taken. As a result, it was found that the noise generation part is a part where the flow direction changes in both the water supply and hot water supply pipes, and the noise becomes large even in the vicinity thereof.
It was also found that the noise frequency of such a part has a high factor on the high frequency side.

The inventor of the present invention has developed a pipe soundproof structure in which the pipe irregularity portion and the vicinity of the pipe irregularity portion are intensively treated with a predetermined pipe soundproof material. The noise of the pipe can be most effectively prevented by soundproofing the noise generation part in consideration of the noise frequency.

The water supply pipe and the hot water supply pipe are common in that the pipe diameter is generally small. Therefore, the pipe is fixed to a portion having a relatively low rigidity, and the vibration of the pipe vibrates boards such as walls, which causes noise. In fact, as a result of an investigation by the present inventor, it was found that the frequency of noise generation was high and the noise was also high at the portion where the pipe was supported by the body, the water supply, and the attachment portion to the water heater. In addition, it was found that the low frequency side factor was high as the frequency of noise to be dealt with.

The present inventor intensively treats the pipe different diameter portion and the vicinity of the pipe different diameter portion with a predetermined pipe soundproof material, and further coats the pipe support portion with the predetermined pipe soundproof material, and around it. We have developed a sound insulation structure for pipes that covers the sound insulation with a fixing member that has higher rigidity than the sound insulation material for pipes. The noise of the pipe can be most effectively prevented by soundproofing the noise generation part in consideration of the noise frequency.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The sound absorbing material according to the present invention contains a fibrous material. Such a fibrous material has fibers fixed to each other to form an aggregate, and has a sheet shape, a mat shape, a tubular shape, or the like. The sound absorbing performance of the sound absorbing material varies depending on the thickness and density of the fibrous material. In the present invention, bulky fibers are used as the fibers used in the fibrous material.

The bulky fiber according to the present invention is required to provide the sound absorbing material with a resilience to withstand a temperature change. The shape of the bulky fiber is not particularly limited as long as the sound absorbing material containing the bulky fiber exhibits such a restoring property. Examples of bulky fibers include hollow fibers and conjugate fibers.

The sound absorbing material according to the present invention is not limited to hollow fibers and conjugate fibers, but can retain the thickness of the fibrous material as a whole, is excellent in elasticity and resilience, and has a certain density as a sound absorbing material. Fibers that can be applied are used. Therefore, it is desirable to select a fiber having an appropriate shape in consideration of the fiber diameter, the length, the heat resistance, etc., in consideration of the balance with the heat insulating material and the sound insulating material.

In the present invention, a bulky fiber having a hollow portion and having an increased bulk can be used. As such bulky fibers, hollow fibers having pores in the fiber length direction are preferred. Such hollow fibers are lightweight, have suitable bulkiness, elasticity,
This is because it has expandability and is excellent in restorability.

For pipes affected by temperature such as hot water supply pipes,
When the heat insulating material is a foam such as closed-cell polymer or rubber, the spring action becomes weaker as the temperature rises. When the sound absorbing material is a polymer or rubber having open cells, the sound absorbing material has a weaker spring action than the heat insulating material. For this reason, the heat insulating material and the sound absorbing material do not have enough force to spread the sound insulating material on the outer circumference, and the dynamic vibration absorbing effect deviates from an appropriate range. The sound absorbing material including the hollow fiber according to the present invention is configured such that the air is expanded between the fibers, the volume of the fiber is large, and the resilience of the fiber ensures the thickness of the fiber, and the sound insulating material on the outer periphery is expanded together with the expanded air. The force works, and the dynamic vibration absorption effect easily enters the appropriate range.

The sound absorbing material containing the hollow fibers is surrounded by the heat insulating material and the sound insulating material, and as the temperature rises, the thickness of the sound absorbing layer itself becomes larger than that of the sound absorbing material containing the solid fibers, and a stronger spring effect is obtained. Demonstrate. Such a sound absorbing material can supplement the decrease in the spring action of the heat insulating material due to high temperature, and can maintain the sound absorbing performance.

Further, in the sound absorbing material containing such hollow fibers, if the sound insulating layer is added as an additional weight, a series spring effect of the heat insulating material and the sound absorbing material produces a dynamic vibration absorbing effect and a vibration preventing effect. Further, since such a heat insulating material is relatively thick to exert a heat insulating effect, the thickness from the pipe to the sound insulating material can be taken through the sound absorbing material, so that the sound absorbing effect is improved.

The hollow fiber according to the present invention is contained in an amount of 30% by weight or more, preferably 50% by weight or more based on the total weight of the fibrous material. This is because the fibrous material containing 30% by weight or more of the hollow fibers exhibits a stronger spring effect as the temperature rises, and exhibits a good dynamic vibration absorbing effect and sound absorbing performance.

The hollow structure of the hollow fiber can be manufactured from various synthetic fibers such as cellulosic fiber rayon and acetate, and any material can be used. Further, the cross-sectional shape is not limited to the round shape, and may be a polygon such as a triangle or a quadrangle, and various other shapes. There is no restriction on the shape and number of the holes, but the ratio of the volume of the holes to the volume of the fibers, that is, the hollow ratio is 10 to 50%, and the hollow fiber having the fiber diameter of 0.5 to 30 denier is preferable. .

In the present invention, bulky fibers in which the fibers are shrunk to increase the bulk can be used. Conjugate fibers can be preferably used as the bulky fibers. Such a conjugate fiber is preferably bulky and highly recoverable as an aggregate of fibers. The conjugate fiber can be molded to have a high shrinkage portion and a low shrinkage portion, and by shrinking the high shrinkage portion and the low shrinkage portion, a fiber that is shrunk and bulky can be obtained. it can.

The high shrinkage portion and the low shrinkage portion may be included so as to cause the fiber to shrink and increase the bulk of the fiber. It is preferable that one fiber includes a high shrinkage portion and a low shrinkage portion when viewed in a cross section thereof to cause the shrinkage. This is because the fibers are likely to be crimped and the resilience of the sound absorbing material is increased. It does not matter whether the high shrinkage portion and the low shrinkage portion are symmetrical or asymmetrical in the cross section of the fiber.

The high shrinkage portion and the low shrinkage portion are respectively
High shrinkage polymers and low shrinkage polymers can be used. There is no limitation on the material of any polymer. The high shrinkage polymer and the low shrinkage polymer shrink due to a treatment such as heat treatment to cause the fiber to shrink.

Such a conjugate fiber is contained in an amount of 25% by weight or more, preferably 50% by weight or more in the whole fibrous material. The obtained sound absorbing material has a good overall restoring property,
It is also bulky and can obtain good sound absorption performance.

Fibrous substances other than the bulky fibers can be contained in the sound absorbing material at a ratio not more than the above-mentioned hollow fibers and conjugate fibers. As such a fibrous material, a fibrous material applied to ordinary piping is used.

Examples of such fibrous materials include various metal fibers, glass wool, rock wool, carbon fibers, inorganic fibers, animal fibers such as wool and silk, vegetable natural fibers such as cotton, hemp and pulp, rayon, acetate, Fibers made from cellulosic fibers of plant natural fibers such as cupra, polyimide fibers such as nylon, polyvinyl fibers such as vinylon, acrylic fibers, polyester fibers, vinyl chloride fibers, vinylidene chloride fibers, polyethylene, Polyolefin fiber such as polypropylene, polycarbonate fiber, polytetrafluoroethylene fiber, polyurea fiber,
It includes those obtained by molding synthetic fibers such as elastomer fibers such as urethane. These fibers or fibrous substances can be used alone or in combination.

The sound absorbing material according to the present invention can contain (A) a foam mainly having an open cell structure and (B) a porous body. (A) Foams mainly having an open cell structure include urethane, liquid rubber, polyethylene, polypropylene, EPT, CR, etc., and the higher the ratio of open cells, the higher the sound absorbing performance.

(B) For the porous material, foams of rubber, plastic, various polymers, etc., powders of paper, fiber, wood, cork, etc., sand, pearlite, etc. may be used singly or in combination with a binder. It is possible to use a molded product obtained by combining the respective particles. These porous bodies have a structure in which voids generated as necessary between the bonded particles are easily communicated with each other, and a sound absorbing effect is generated in the voids. Such a porous material has a particle size distribution of powder particles, a compression force at the time of molding, a bonding strength between voids and particles is adjusted by the kind and amount of the binder,
Sound absorption performance can be set.

Next, the water supply or hot water supply pipe soundproof structure of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a vertical sectional view of a hot water supply pipe soundproof structure according to an example of the present invention. This hot water supply pipe soundproof structure 27 is composed of a horizontal straight pipe 1, a deformed pipe 2 bent at an angle of 90 °, and a vertical straight pipe 3. These pipes are joined together to form a pipe soundproof structure. 27 are configured. The outer periphery of the deformed pipe 2 is covered with a pipe sound insulating material 8 including a heat insulating material layer 4, a moisture insulating material layer 5, a sound absorbing material layer 6, and a sound insulating material layer 7. Straight pipe 1 is deformed pipe 2
Is provided with a deformed portion adjacent to. In FIG. 1, on the outer periphery of the straight pipe 1, a pipe sound insulating material 13 including a heat insulating material layer 9, a moisture insulating material layer 10, a sound absorbing material layer 11, and a sound insulating material layer 12 is provided at a portion not covered with the pipe sound insulating material 8. It is covered.

The straight pipe 3 also has a portion near the deformed portion adjacent to the deformed pipe 2. In FIG. 1, among the vicinity of the deformed portion,
At the same position as the straight pipe 1, the heat insulating material layer 14, the moistureproof material layer 15,
Piping soundproof material 18 including sound absorbing material layer 16 and sound insulating material layer 17
Are covered.

In the hot water supply pipe soundproof structure 27, the straight pipe 1
The water flowing in from the direction of depends on the flow rate and the flow velocity,
The flow direction of the deformed pipe 2 is suddenly changed, vibration is generated in the pipe, and the pipe 3 flows out in the direction of the straight pipe 3. The deformed pipe 2 is provided with a pipe soundproofing material 8 to reduce impact noise generated when the flowing water changes its direction. Further, in the hot water supply pipe soundproof structure 27, in the vicinity of the deformed portion in the upper portion of the straight pipe 1,
A pipe soundproof material 18 is provided. Therefore, the hot water supply pipe soundproof structure 27 can effectively reduce the impact sound generated by the collision of running water. Further, in the hot water supply pipe soundproof structure 27, the pipe soundproof material 13 is provided also in the vicinity of the deformed portion of the straight pipe 1. The pipe soundproofing material 13 can effectively reduce radiated sound, solid propagating sound, and transmitted sound of the piping structure.

In this way, the pipe soundproofing material is provided in the range from the end of the deformed pipe toward the inflow side and the outflow side of the straight pipe, where L is the entire outer circumference of the deformed pipe and the inner diameter of the straight pipe. Three
It is the outer circumference of a straight pipe in the range of L to 9L. If the pipe soundproofing material has a length within this range, the resulting water supply or hot water supply pipe soundproofing structure exerts an excellent noise prevention effect. If it is less than 3 L, if the water supply pressure or the hot water supply pressure is high, neither vibration nor sound can be sufficiently reduced, and the noise prevention effect becomes insufficient. Conversely, 9
Even if the treatment exceeds L, the noise prevention effect remains almost unchanged, so there is no point in spending material and construction time.

In the present invention, by covering the outer circumference of the water supply pipe or the hot water supply pipe with a predetermined pipe soundproofing material, the noise generating portion is covered and the noise of the pipe is reduced. More specifically, (1) the heat insulating material and the sound absorbing material are two kinds of layered spring materials, and the sound insulating material on the outer periphery thereof is an additional weight. Such a pipe soundproofing material reduces the vibration of the pipe due to the vibration damping effect by the dynamic vibration absorption. (2) The sound transmitted through the heat insulating material absorbs sound energy by the sound absorbing material on the outer periphery thereof, and is further absorbed by the sound absorbing material on the outer periphery of the sound absorbing material and the component that is reflected back to the sound absorbing material side and again absorbed by the sound absorbing material. It is divided into a component that is transmitted and output as sound. The noise reduction effect is that the thickness of the heat insulation layer and the thickness of the sound absorption layer, which originally exhibit heat insulation performance, effectively act to absorb noise and increase the sound energy loss up to the sound insulation layer. As a result, the noise becomes a low value that cannot be obtained by the soundproof structure in which the pipe is directly covered with the sound absorbing layer and the sound insulating layer.

Next, the structure of the pipe soundproof material used in the water supply or hot water pipe soundproof structure of the present invention will be described. It is desirable that such a pipe soundproofing material has good mountability during construction.
In the present invention, as the sound absorbing material, the above-mentioned sound absorbing material containing bulky fibers is used.

The sound insulating material is not limited to water supply or hot water supply piping,
What is applied to piping in general can be used. Examples of the sound insulation material include a sheet-like material and a lead sheet obtained by highly filling a polymer such as rubber or vinyl chloride with a high specific gravity filler. In particular, for pipes that are affected by temperature, such as hot water supply pipes, rubber-based sound insulation materials that are particularly excellent in expansion and contraction followability are preferable. In addition, such a sound insulating material is rarely provided directly on a pipe that serves as a sound source or a vibration source, and if it is provided at a position where a layer such as a sound absorbing material is routed, the sound insulating material and sound absorbing material can be sufficiently thickened. The synergistic effect of the materials can further improve the soundproofing performance of the pipe.

When the temperature difference between the inside of the pipe and its surroundings is significant, it is preferable to dispose a heat insulating material on the outer periphery of the pipe. Such a heat insulating material is intended to prevent freezing in the winter in the water supply pipe, to prevent dew condensation during high humidity, and to keep the heat in the hot water supply pipe to prevent heat energy loss. Insulation with this purpose should be provided in the water supply or hot water supply pipe. However, in the present invention, any heat insulating material can be used as long as it is a heat insulating material that achieves the above object. In addition, by covering the outer circumference of the water supply or hot water supply pipe with a heat insulating material and adding a sound absorbing material, a sound insulating material, etc. to the outer circumference thereof, the obtained pipe soundproof structure can most effectively prevent noise. Therefore, in the present invention, there is no particular limitation as the heat insulating material.

Examples of the heat insulating material include foams such as polyethylene, polypropylene, polystyrene, polyurethane, EPT and CR, and inorganic fibers such as glass wool and rock wool. Further, they may be formed in a tubular shape and may have slits formed in one of the tubes, the tube may be halved, or a moisture-proof material may be provided on the outer circumference.

The heat insulating material of the hot water supply pipe is preferably a foamed material such as polyethylene, polypropylene, polyurethane, EPT or CR having a high closed cell ratio. Such insulation is
It may be a laminated structure of a plurality of materials. Further, the hot water supply pipe may be a pipe with a heat insulating material.

In the present invention, a moistureproof material can be used for the water supply or hot water supply piping. In the water supply pipe, especially when the temperature inside the pipe is low and the surrounding environment is humid, dew condensation easily occurs on the surface of the pipe. A material such as a heat insulating material or a sound absorbing material that does not easily conduct heat is surrounded by the outer circumference of the piping.However, since the performance of the heat insulating material or the sound absorbing material is maintained for a long period of time, it is very difficult to use a moistureproof material for such a piping. It is an effective means. As the moistureproof material, for example, a film or sheet of aluminum foil, asphalt-impregnated paper, polyethylene, polypropylene, polyester, vinylidene chloride, vinyl chloride or the like may be used alone or in combination, and either the heat insulating material or the sound absorbing material may be used. Just stick to the.

Further, like the soundproofing treatment of general piping,
The butting portion of the pipe soundproof material of the water supply or hot water supply pipe has a gap. If this gap is left as it is, it causes sound leakage. In order to avoid such a situation, it is particularly effective to close the gap in the outermost peripheral layer with a joint tape or the like. For example, even in a soundproof structure for water supply or hot water supply, the tape-like material sticking to the adhesive layer or the caulking agent can be used alone or in combination.

In FIG. 1, around the hot water supply pipe soundproof structure 27,
In particular, the tape 20 is wrapped around the boundary 19 between the pipe soundproofing material 8 and the pipe soundproofing material 13. Further, in the hot water supply pipe soundproof structure 27, the tape 22 is also wound around the outer periphery of the joint between the pipe soundproof material 8 and the pipe soundproof material 18. Further, a tape 24 is wound so as to cover the end portion 23 of the pipe soundproofing material 13. The tape 26 is also wound around the end 25 of the pipe soundproofing material 18. In this way, if the joint portion with the adhesive layer is attached to the abutting portion of the pipe soundproofing material, sound leakage can be prevented for a long period of time, and the pipe soundproofing member can be fixed without a gap for a long period of time.

The material of the joint tape may be the same as the material of the sound insulation material, but a thin one is sufficient. Also,
A tape width of 30 to 100 mm is suitable. Growth rate is 1
It is preferably from 0 to 200%. Also, the adhesive layer of the tape is
The adhesive layer of polymer of the same type as the tape material is good, and it is easy to integrate with time and can be used with confidence.

FIG. 2 is a sectional view of the pipe soundproof structure of FIG. 1 taken along the line AA. A heat insulating material layer 9 is provided on the outer circumference of the pipe 1, and a moistureproof material layer 10 is provided on the outer circumference thereof.
Is the wrap layer 10 on the abutting portion 9a of the heat insulating material layer 9.
a. The sound absorbing material layer 11 is provided on the outer periphery thereof.
The sound absorbing material layer 11 contains hollow fibers and exhibits excellent resilience against temperature changes. The sound insulating material layer 12 on the outer periphery of the sound absorbing material layer 11 has a lap portion 12a on the abutting portion 11a of the sound absorbing material layer 11 to prevent a gap. A tape 24 is wound around the end of the sound insulation layer 12.

FIG. 3 is a perspective view of a pipe soundproofing material integrally molded in advance. The pipe soundproofing material 32 is the heat insulating material layer 2 from the pipe side.
8, a sound absorbing material layer 29, and a sound insulating material layer 30, which are integrally laminated in a tubular shape. Since this pipe soundproof material 32 is attached to the pipe, the abutting portion 3 where one portion of the cylinder is opened
Have one. The sound insulating material layer 30 has a wrap portion 30a so that there is no gap in the butting portion 31.

In the water supply or hot water supply pipe soundproof structure of the present invention,
It is preferable that the portion of the straight pipe portion supported by the body is covered with a pipe soundproofing material and a fixing member made of a material having higher rigidity than the pipe soundproofing material. FIG. 4 is a cross-sectional view of such a straight pipe support portion subjected to the coating treatment. In the support portion 44 of the straight pipe 33, the straight pipe 33
The outer periphery of the heat insulating material layer 34, the moistureproof material layer 35, the sound absorbing material layer 36,
The pipe soundproofing material 38 including the soundproofing material layer 37 is covered, and the outer periphery of the pipe soundproofing material 38 is further covered with a fixing member 39 having higher rigidity than the pipe soundproofing material. The support portion 44 is fixed to the fixing metal fitting 40 with bolts 41, and is further fixed to the frame 42 with anchor bolts 43.

In the soundproofing treatment of the pipe supporting portion, the pipe soundproofing material acts as a damping material by using the piping and the fixing member having high rigidity as a restraining material. If the circumference of the pipe is processed over a longer range, the pipe soundproofing material as a damping material will be fixed in a longer section, forcibly suppressing the vibration of the pipe and reducing the vibration of the pipe itself, Vibration transmission to the part of the body to be fixed is also reduced, which is effective in preventing solid-borne sound.

It is preferable that the pipe of the support portion has a length which is 2 to 7 times the inner diameter of the pipe of the straight pipe portion and is subjected to soundproofing. By treating the support portion in such a range, it is possible to most effectively prevent noise from the water supply pipe or the hot water supply pipe. More specifically, when the processing section is less than double, vibration reduction is insufficient, which is not desirable. On the other hand, if the processing section exceeds 7 times, the number of fixing parts between the skeleton and the pipes increases, so that it takes time to process,
Even in terms of soundproofing performance, up to 7 times is sufficient, without the effect of taking time and effort.

The outer periphery of the water supply or hot water supply pipe of the portion supported by the body can be covered with a pipe soundproof material of the same quality as the pipe soundproof material used for the above-mentioned pipe irregularity portion and the vicinity of the irregularity portion. Further, the outer periphery of the pipe soundproof material of the support portion is covered with a fixing member having higher rigidity than the pipe soundproof material. Such highly rigid materials include polymers such as styrene, phenol, epoxy, unsaturated polyester, polyethylene, polypropylene, vinyl chloride, acrylic,
Metals such as iron, aluminum, copper, brass and stainless can be used alone or in combination.

If the pipe is covered with the pipe soundproofing material and the member having high rigidity of the supporting portion, the vibration of the pipe can be attenuated more quickly, and the vibration can be less likely to be transmitted to the body on the fixed side of the supporting portion. The length that covers the pipe is the inner diameter L of the pipe.
On the other hand, it is 2L to 7L. It is not always effective to cover the entire outer peripheral surface of the pipe other than the support portion with such a pipe soundproofing material. By covering the pipe of the supporting portion within this range, it is possible to sufficiently prevent the vibration of the pipe from being transmitted to the body.

[0055]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on embodiments with reference to the drawings. Example 1 A hot water supply pipe soundproof structure having a flow path shown in FIG. 5 was manufactured having a deformed portion and a portion in the vicinity of the deformed portion as shown in FIG. 1 and a pipe supporting portion as shown in FIG.

FIG. 5 is a schematic view showing the entire hot water supply piping structure. This figure shows the piping structure suspended from the ceiling on the first floor and viewed obliquely from below. The piping structure 54 includes a straight pipe portion 45, a deformed portion 46, a pipe soundproof material 49 that covers the deformed portion 46, a portion 47 near the deformed portion, and a support portion 48 of the straight pipe, and a support portion 48 of the straight pipe. It is composed of a fixing member 50 covering the soundproof material from the outer periphery. This piping structure 5
4 is fixed to the hanging fitting 52 with the bolt 51, and the ceiling 5 on the first floor
It is suspended at 3.

The pipe structure 54 has six flow path changing portions, and the pipe soundproof material 49 is covered at a predetermined length at each of the flow passage changing portions. Joint 5 between pipe soundproofing materials 49
Joint tapes 57 are attached to both ends 56 of the pipe 5 and the pipe soundproof material 49. In the support portion 48 of the straight pipe, the straight pipe 45
Is covered with pipe soundproofing material, and both ends 58 of the pipe soundproofing material are covered.
Are treated with a joint tape 59 and fixed with a fixing member 50 made of a material having a rigidity higher than that of the pipe soundproof material.

Inflow side pipe 60 at one end of this piping structure 54
Penetrates the ceiling 53 on the first floor, and
Flows in from. Outflow side pipe 61 at the other end of the piping structure 54
Also, it penetrates the ceiling 53 on the first floor, and the inflowing water flows out from the pipe 61.

For the hot water supply pipe, the nominal diameter of the heat insulation coated copper pipe is 1 /
2 inches (outer diameter 15.88 mm), inner diameter 14.86 mm
Outside diameter of 47φm where heat insulation material and moisture proof material are integrated into the piping of
m pipe was used.

In this soundproof structure for hot water supply pipe, the heat insulating material integrated with the hot water supply pipe is a urethane foam, and the moistureproof material is a vinyl chloride film, both of which are adhered to the entire outer circumference of the pipe without any space. Soundproofing was performed on this pipe. Regarding the treatment length, in the pipe in the vicinity of the deformed portion, from the point where the center line of the inflow side straight pipe and the center line of the outflow side straight pipe intersect each other, up to a length of 45 mm in the pipe axial direction, covered with a pipe soundproofing material. .
This coating distance is 3.0 times the inner diameter of the straight pipe. Further, in this piping structure, the outer periphery of the straight pipe of the pipe support portion was covered with a pipe soundproof material with a length of 32 mm in the pipe axis direction.
This coating distance is 2.2 times the inner diameter of the straight pipe.

As the pipe soundproofing material, a sound absorbing material was applied to the outer circumference of the pipe on which the heat insulating material and the moistureproof material were applied. As the sound absorbing material, a non-woven fabric having a thickness of 5 mm in which 70 wt% polyester hollow fiber and 30 wt% polyester solid fiber were mixed was used. A sound insulating material was applied to the outer circumference of the sound absorbing material. This sound insulating material is a non-vulcanized butyl rubber sheet having an areal density of 3.5 kg / m ² .

At the pipe supporting portion, a fixing member was attached after being treated with a pipe soundproofing material. As this fixing member, 32
A 2 mm thick iron plate having a length of mm was used. This fixing member was fixed to the fixing fitting with a bolt.

The abutting portion of the notch in the inner corner of the pipe soundproof material,
Both ends of the pipe soundproofing material and both ends of the pipe soundproofing material used for the pipe supporting portion were adhered and sealed with a butyl rubber joint tape without a gap. The portions of the pipe soundproofing material, which are only the joint tapes and protrude from both ends, are not included in the soundproofing treatment portion in the vicinity of the deformed portion.

Test Method FIG. 6 is a sectional view showing a noise measuring device having a piping structure.
In this figure, the piping structure 54 detailed in FIG. 5 is suspended on the floor slab body 62. The water supply is sent from the tank 64 by the pump 63 through the line 65 to the water heater 70, where it is heated and injected into the piping structure 54. This hot water circulates in the piping structure 54, passes through the line 66, and returns to the tank 64.

The noise of such a piping structure is measured while continuously supplying hot water (water supply pressure is 9 kg / cm ² ). The sound generated at that time was caught by the microphone 67 installed on the first floor and sent from the precision sound level meter 68 to the frequency analyzer 69 for measurement.

Noise was measured for the hot water supply pipe soundproof structure of this example. The results are summarized in Table 1.

Example 2 A hot water supply pipe soundproof structure was manufactured in the same manner as in Example 1 except that the length of the soundproofing treatment was changed in the piping structure of Example 1. As for the treatment length, in the vicinity of the deformed portion, a pipe soundproof material was coated from the end of the deformed pipe to a length of 120 mm in the pipe axial direction. This coating distance is 8.1 times the inner diameter of the straight pipe. Further, in this piping structure, the outer periphery of the straight pipe of the pipe support portion was covered with a pipe soundproof material with a length of 100 mm in the pipe axis direction. This coating distance is 6.7 times the inner diameter of the straight pipe. With respect to this hot water supply pipe soundproof structure, noise was measured in the same manner as in Example 1. The results are summarized in Table 1.

Example 3 In the piping structure of Example 1, the type of pipe soundproofing material was changed,
A hot water supply pipe soundproof structure was manufactured in the same manner as in Example 1 except that the length of the soundproofing treatment was changed. The sound absorbing material used in Example 1 was replaced with 32% by weight of hollow polyester fiber, 68% by weight
A 7 mm thick non-woven fabric composed of mixed fibers of solid polypropylene fibers was used. As a sound insulation material, areal density 1.5 kg
/ M ² of non-vulcanized EPT / butyl rubber sheet was applied to the outer periphery of the nonwoven fabric. The length of the soundproofing treatment is 79 mm from the intersection of the center lines of the two types of straight pipes on the basis of the same standard as in Example 1.
A pipe soundproofing material was adhered to the vicinity of the deformed portion having a length of 4 mm, and the pipe support portion was soundproofed to a length of 47 mm. The processing length in the vicinity of the deformed portion is 5.3 times the inner diameter of the straight pipe. The processing length of the pipe support portion is 3.2 times the inner diameter of the straight pipe. With respect to this hot water supply pipe soundproof structure, noise was measured in the same manner as in Example 1. The results are summarized in Table 1.

Example 4 The sound absorbing material used in Example 3 was made of a mixed fiber of 27% by weight of hollow conjugate fiber (high shrinkage polyester / low shrinkage polyester) and 73% by weight of solid polypropylene fiber. A hot water supply pipe soundproof structure was manufactured in the same manner as in Example 3 except that the thickness of the nonwoven fabric was changed. With respect to this hot water supply pipe soundproof structure, noise was measured in the same manner as in Example 1. The results are summarized in Table 1.

Example 5 The sound absorbing material used in Example 3 was made of a mixed fiber of 65% by weight of hollow conjugate fiber (high shrinkage polyester / low shrinkage polyester) and 35% by weight of solid polypropylene fiber. A hot water supply pipe soundproof structure was manufactured in the same manner as in Example 3 except that the thickness of the nonwoven fabric was changed. With respect to this hot water supply pipe soundproof structure, noise was measured in the same manner as in Example 1. The results are summarized in Table 2.

Comparative Example 1 A hot water supply piping structure was manufactured with the piping, the heat insulating material, and the moistureproof material remaining in the integrated state. With respect to the hot water supply piping structure manufactured in this way, noise was measured in the same manner as in Example 1. The results are summarized in Table 2.

Comparative Example 2 A pipe structure was manufactured in the same manner as in Example 3 except that the type of pipe soundproofing material in Example 3 was changed and the soundproofing length was partially changed. In this hot water supply piping structure, EPT is used as a sound absorbing material.
A 10 mm-thick foam mainly composed of open cells was deposited.
Around the periphery, as a sound insulation material, an areal density of 1.5 kg / m ²
Butyl rubber sheet was applied. The soundproofing treatment length in the vicinity of the deformed portion is 79 mm as in the third embodiment. However, the pipe support was 30 mm in length and was soundproofed. The processing length of the pipe support is 2.0 times the inner diameter of the straight pipe. Further, in this supporting portion, the outer circumference of the pipe soundproof material was fixed to a length of 25 mm with a commercially available iron T-shaped band. With respect to this hot water supply pipe soundproof structure, the noise was measured in the same manner as in Example 1. The results are summarized in Table 2.

Comparative Example 3 The soundproof material of Example 5 was changed to 100% by weight of solid nylon fiber having a thickness of 7 mm. All other conditions were the same as in Example 5. The noise measurement results are summarized in Table 2.

[0074]

[Table 1]

[0075]

[Table 2]

In the hot water supply pipe soundproof structure of the first embodiment, the hot water supply noise is 125 Hz compared to the structure of Comparative Example 1 in which only the hot water supply pipe is used.
5.4d for any frequency in the above 1 octave band
B to 17.7 dB can be improved and noise level is 10.6 dB
_{(A) It} can be improved and good results can be obtained.

In the hot water supply pipe soundproof structure of the second embodiment, the hot water supply sound can be improved by 5.7 dB to 18.9 dB at all frequencies and the noise level is 1 as compared with the structure of Comparative Example 1 in which only the hot water supply pipe is provided.
It is 2.4 dB _{(A) and} good.

In the pipe soundproof structure of the third embodiment, the hot water supply noise is
Compared to the structure of Comparative Example 1 having only hot water supply piping, the frequency is improved by 5.0 to 15.3 dB at a frequency of 125 Hz or higher, and the noise level is improved by 9.6 dB _(A), which is excellent.

In the pipe soundproof structure of the fourth embodiment, the hot water supply noise is
Compared with the structure of Comparative Example 1 having only hot water supply pipes, 4.9 to 14.9 dB was improved at each frequency of 125 Hz or higher, and the noise level was also improved by 10.9 dB _(A), which is good.

In the pipe soundproof structure of the fifth embodiment, the hot water supply noise is
Compared with the structure of Comparative Example 1 having only hot water supply pipes, it is improved by 8.1 to 19.7 dB at each frequency of 125 Hz or higher, and the noise level is improved by 13.2 dB _(A), which is excellent.

In the pipe soundproof structure of Comparative Example 2, the hot water supply noise is
Compared with the structure of Comparative Example 1 including only the hot water supply pipe, there is an improvement of 4.1 to 14.2 dB at each frequency of 125 Hz or higher. However, compared to Examples 1 to 5, the improvement amount of 1000 Hz or higher is poor.

In the pipe soundproofing structure of Comparative Example 3, the hot water supply noise is improved by 4.5 to 14.1 dB at each frequency of 125 Hz or more, as compared with the structure of Comparative Example 1 in which only the hot water supply pipe is provided. The noise level is improved by 6.0 dB _(A), but 1000H
The amount of improvement on the high frequency side above z is poor. Also, the noise level is improved width least 6.0 dB _(A), not in the following 40 dB _(A).

[0083]

EFFECTS OF THE INVENTION Since the pipe soundproofing material according to the present invention contains a predetermined bulky fiber material having excellent resilience, the sound absorbing performance can be maintained even when the temperature is changed.

[0084] Thus, water or according to the hot water supply pipe soundproof structure of wearing the pipe deadening the predetermined range to be the present invention
Or the pipe fixing member is covered in a predetermined range.
Because there, even when subjected to temperature changes, the sound absorption performance is maintained
Together, most effectively, and the noise of economically feedwater or hot water supply pipe to quickly be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a hot water supply pipe soundproof structure according to an example of the present invention.

FIG. 2 is a sectional view of the pipe soundproof structure of FIG. 1 taken along the line AA.

FIG. 3 is a perspective view of a pipe soundproof material integrally molded in advance.

FIG. 4 is a vertical cross-sectional view of a pipe support portion.

FIG. 5 is a perspective view showing a test flow path of a water supply pipe.

FIG. 6 is a vertical cross-sectional view of a noise measuring device.

[Explanation of symbols]

1,33 Horizontal straight pipe 2 90 ° curved deformed pipe 3 Vertical straight pipe 4,9,14,28,34 Thermal insulation layer 5,10,15,35 Moisture proof layer 6,11,16,29, 36 sound-absorbing material layers 7, 12, 17, 30, 37 sound-insulating material layers 8, 13, 18, 38 pipe sound-insulating materials 9a, 11a, 31 butting portions 10a, 11a, 31 lap portions 19, 21 pipe sound-insulating material joints 20, 22, 24, 26, 57, 59 Joint tape 23, 25 End of pipe soundproof material 27 Hot water supply pipe soundproof structure 32 Pipe soundproof material integrally formed 33 Straight pipe 39, 50 Fixing member 40 Fixing metal fitting 41, 51 Bolt 42 Body 43 Anchor bolt 44 Piping support part 45 Straight pipe part 46 Deformed part 47 Near deformed part 48 Straight pipe support part 49 Piping soundproof material 52 Hanging metal fitting 53 First floor ceiling 54 Hot water supply piping soundproof structure 55 Joints 56, 58 Piping soundproofing Both ends of the material 60 Inflow side piping 62 Floor slab frame 63 Pump 64 Tank 65, 66 Line 67 Microphone 68 Precision noise meter 69 Frequency analyzer 70 Water heater

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16L 53/00-55/48 E03C 1/02

Claims (2)

(57) [Claims] 1. A water and hot water supply pipe and a pipe soundproofing member.
Water supply that reduces the noise generated from the piping.
Alternatively, in a hot water supply pipe soundproof structure, the pipe has a deformed portion and a straight pipe portion adjacent to the deformed portion.
A deformed portion having the straight pipe portion adjacent to the deformed portion
The pipe soundproof material is used to secure the fibers to each other.
Includes bulky fibrous material as a sound-absorbing material
The change in resilience due to temperature changes is suppressed.
The pipe soundproofing material is the entire outer circumference of the deformed pipe and the inner diameter of the straight pipe.
Where L is L, the inflow of the straight pipe from the end of the deformed pipe
The straight line in the range of 3L to 9L toward the discharge side and the discharge side.
The deformed portion and the deformed portion that cover the outer circumference of the pipe
Characterized by reducing the noise generated in the vicinity
Soundproof structure for water supply or hot water supply piping. 2. A water or hot water supply pipe and a pipe soundproofing material
Water supply that reduces the noise generated from the piping.
Alternatively, the hot water supply pipe has a soundproof structure, and the pipe has a deformed portion and a straight pipe portion adjacent to the deformed portion.
And a supporting portion supported by the body,
The straight pipe section is provided with a section near the deformed section adjacent to the deformed section.
The deformed portion, the support portion, and the vicinity of the deformed portion.
The outer periphery of the pipe is covered with the pipe soundproofing material,
Bulky piping soundproof material consisting of an assembly of fibers fixed together
It contains fibrous material as a sound absorbing material, and
The change in originality is suppressed, and the pipe protection of the support part is
The outer circumference of the sound material is made of a material with higher rigidity than the sound insulation material for piping.
Is covered with a fixing member that
The pipe is covered with a length of 2L to 7L with respect to the inner diameter L of the pipe.
Covers the deformed portion, the support portion, and the deformed portion
Characterized by reducing the noise generated in the vicinity
Soundproof structure for water supply or hot water supply piping.