JP2005180649A - Sound insulation fireproof two-layered pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulation fireproof two-layered pipe capable of sufficiently absorbing frequencies of 1,000-4,000 Hz at a sound pressure level and restraining vibrations from transmitting to an outer pipe generated when drainage passes through an inner pipe and minimizing capacity of the pipe itself and manufacturing at low costs. <P>SOLUTION: The sound insulation fireproof two-layered pipe comprises the outer pipe made of a fiber-reinforced mortar forming pipe, and the inner pipe made of a straight synthetic resin pipe wrapped into the outer pipe or a pipe joint. A strip of sound-absorbing material is arranged on an outer peripheral surface of the inner pipe so as not to come into contact between the outer peripheral surface of the inner pipe and an inner peripheral surface of the outer pipe, and a zone enclosed by the outer peripheral surface of the inner pipe, the strip of sound-absorbing material, and the inner peripheral surface of the outer pipe is set to be a space. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sound insulation and fireproof two-layer pipe having a sound insulation effect, impact resistance, and earthquake resistance used for drainage in an apartment house such as an apartment.

  In recent years, synthetic resin pipes such as vinyl chloride and cast iron pipes, which are metal pipes, have been used as drain pipes for apartment houses, high-rise buildings, and general houses. Of these, cast iron pipes are heavy and difficult to handle, and there are inconveniences such as condensation on the outer periphery. On the other hand, synthetic resin pipes have gradually become widely used because they have excellent chemical resistance, corrosion resistance, inner surface smoothness, and workability compared to metal pipes. However, this synthetic resin pipe such as vinyl chloride is inferior in fire resistance and spreads easily in the event of a fire. In apartment buildings, there is a risk of fire passing through this synthetic resin pipe to other sections. It was a problem. Therefore, in order to cover such a drawback that it is easy to spread the fire, a fireproof tube in which the outer periphery of the synthetic resin tube is coated with a nonflammable material has been widely used.

For example, Patent Document 1 discloses a coating layer in which an inner tube is integrated with an inner layer having an open porosity of 50 to 90% by volume and a dense outer layer having a density of 1.0 g / cm ³ or more and a thickness of 0.5 to 5 mm. A sound absorbing and insulating tubular body is disclosed.

  Patent Document 2 includes a synthetic resin inner tube, a sound insulation layer covering the outer peripheral surface of the inner tube, and a coating layer covering the outer peripheral surface of the sound insulation layer with a hydraulic inorganic material. There is disclosed a sound insulation composite pipe (first item) characterized in that: and the sound insulation composite pipe (second item) having a vibration-proof layer on the inner surface and / or outer peripheral surface of the sound insulation layer.

  Further, Patent Document 3 includes an inner pipe through which drainage flows, an outer pipe covering the inner pipe, and a damping layer formed of a damping material provided between the inner pipe and the outer pipe. Damping damping pipe material for building facilities drainage (Claim 1); an inner pipe through which drainage flows, an outer pipe covering the inner pipe formed of a refractory material, an inner pipe and an outer pipe And a damping layer formed of a member having a damping function including at least one of asphalt, synthetic rubber, synthetic resin, or fiber filler using synthetic resin as a binder. Dampening damping pipe for drainage of constructed building equipment (Claim 2); A damping joint for pipes connecting and branching pipes and pipes, including an inner pipe through which drainage flows and an inner pipe made of refractory material It is provided between the outer pipe to be covered, the inner pipe, and the outer pipe, and at least asphalt, synthetic rubber, synthetic tree Or a damping layer formed of a member having a damping function including any one of fiber fillers using a synthetic resin as a binder, and a damping joint for a damping pipe material for drainage of building equipment, (Claim 3) is disclosed.

  Further, Patent Document 4 includes an inner pipe through which drainage flows and an outer pipe formed of an inorganic material such as mortar and cement that covers the inner pipe, and the outer side of the inner pipe. Is provided with a sound absorbing layer formed of a felt or foam porous material, and on the outside of the sound absorbing layer, a sound insulating layer formed by adding an asphalt material to a rubber-based material is provided. There is disclosed a soundproofing pipe for drainage of building equipment, characterized in that a soundproofing layer comprising two layers of the sound absorbing layer and the sound insulating layer is provided between the outer pipe and the outer pipe.

  Furthermore, in Patent Document 5, it is composed of an inner tube made of synthetic resin, an intermediate layer having soundproof performance on the outer periphery of the inner tube, and an outer tube made of a nonflammable material that covers the intermediate layer. Refractory three-layer pipe (Claim 1); The refractory three-layer pipe provided with an air layer by a gap between at least one of the inner pipe and the intermediate layer or between the intermediate layer and the outer pipe (Claim). 2) is disclosed.

Japanese Patent Application Laid-Open No. 60-30887 Claims JP 63-225782 A Claims Japanese Patent Laid-Open No. 10-252952 Claims Japanese Patent Application Laid-Open No. 11-230470 JP, 2001-74191, A Claims

  However, the refractory pipe disclosed in Patent Document 1 cannot be used as a drain pipe, and the refractory pipes disclosed in Patent Documents 2 and 4 have a frequency that is said to be the region most audible to the human ear. What has a certain effect on suppressing the sound pressure level of 1000 to 4000 Hz is not satisfactory in terms of cost. Moreover, the fireproof tube disclosed in Patent Document 3 cannot sufficiently absorb the sound pressure level of 1000 to 4000 Hz, and further improvement is desired. Further, in the fireproof three-layer pipe disclosed in Patent Document 5, an air layer is provided between the inner pipe and the intermediate layer, or at least one of the intermediate layer and the outer pipe. It is technically difficult to provide an air layer between the intermediate layer and the intermediate layer or between the intermediate layer and the outer tube, which not only causes an increase in cost, but also increases the volume of the tube itself.

  Therefore, the object of the present invention can sufficiently absorb the sound pressure level of frequency 1000 to 4000 Hz, can suppress the propagation of vibrations generated when drainage passes through the inner pipe to the outer pipe, An object of the present invention is to provide a soundproof and fireproof double-layered tube that can minimize the volume of the tube itself and can be manufactured at low cost.

  That is, the present invention relates to an outer peripheral surface of an inner pipe in a fireproof two-layer pipe composed of an outer pipe made of a fiber-reinforced mortar molded pipe and a synthetic resin straight pipe or an inner pipe made of a pipe joint. The band-shaped sound absorbing material is disposed on the outer tube so that the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube do not come into contact with each other, and the band surrounded by the outer peripheral surface of the inner tube, the band-shaped sound absorber and the inner peripheral surface of the outer tube is a space. The present invention relates to a sound insulation and fireproof two-layer pipe.

  Moreover, the sound insulation fireproof two-layer pipe of the present invention is characterized in that two or three or more belt-like sound absorbing materials are arranged in the pipe axis direction on the outer peripheral surface of the inner pipe.

  Furthermore, the sound insulation fireproof two-layer pipe of the present invention is characterized in that two or three or more belt-like sound absorbing materials are arranged at equal intervals on the outer peripheral surface of the inner pipe.

  Moreover, the sound insulation fireproof two-layer pipe of the present invention is characterized in that one or two or more belt-like sound absorbing materials are spirally wound on the outer peripheral surface of the inner pipe.

  Furthermore, the sound insulation fireproof two-layer pipe of the present invention is characterized in that two or more belt-like sound absorbing materials are spirally wound on the outer peripheral surface of the inner pipe at equal intervals.

  Furthermore, the sound insulation and fireproof two-layer pipe of the present invention includes the inner pipe and the band-shaped sound absorbing material in a state in which the outer pipe is freely swingable with the outer peripheral surface of the band-shaped sound absorbing material disposed on the outer peripheral surface of the inner pipe. It is characterized by being.

  Moreover, the sound insulation fireproof two-layer pipe of the present invention is characterized in that the ratio of the volume of the band-shaped sound absorbing material to the total volume of the volume of the band-shaped sound absorbing material + the volume of the space is 12 to 35%.

  Furthermore, the sound insulation fireproof two-layer pipe of the present invention is characterized in that the band-shaped sound absorbing material is rock wool.

  According to the sound insulation fireproof double-layer pipe of the present invention, a low-volume fireproof double-layer pipe capable of effectively absorbing a sound pressure level of a frequency of 1000 to 4000 Hz and suppressing vibration can be provided at low cost. This is an effect.

  The sound insulation and fireproof two-layer pipe of the present invention has a belt-like sound absorbing material on the outer peripheral surface of an inner pipe made of a synthetic resin straight pipe or a pipe joint, and an inner pipe of an outer pipe made of a fiber reinforced mortar molded pipe The inner tube is disposed so as not to contact the peripheral surface and the band-shaped sound absorbing material is disposed in the outer tube, and the outer surface of the inner tube, the band-shaped sound absorbing material, and the inner of the outer tube are included. The band surrounded by the peripheral surface forms a space, and by providing a layer made of a band-shaped sound absorbing material and air between the inner tube and the outer tube, the increase in the volume of the soundproof and fireproof two-layer tube is suppressed, and the frequency A sound pressure level of 1000 to 4000 Hz can be effectively absorbed.

  Examples of the inner pipe made of a synthetic resin straight pipe or pipe joint used for the sound insulation and fireproof double-layer pipe of the present invention include a hard vinyl chloride pipe (JIS K 6741), a hard polyvinyl chloride pipe for water supply (JIS K 6742), List heat-resistant rigid polyvinyl chloride pipe (JIS K 6776), recycled foam three-layer pipe (AS59), recycled three-layer pipe (AS62), REP pipe (AS58), polyethylene pipe, polybutene pipe, and pipe joints of these materials However, it is not limited to these.

  Next, in the sound insulation and fireproof two-layer pipe of the present invention, the material of the belt-like sound absorbing material installed on the outer peripheral surface of the inner pipe is rock wool, glass wool, felt made of ceramic wool, mat, blanket, natural rubber, synthetic rubber Rubber, recycled rubber, paper (cardboard), urethane foam, polyethylene foam, phenol foam, needle felt, resin felt, foam material (urethane, styrene, urea, other thermoplastic resins, thermosetting resin homopolymers, Polymer), fiber filler using synthetic resin as a binder, glass fiber, asphalt and the like can be exemplified. Among these materials, the band-like sound absorbing material is preferably made of rock wool.

  The thickness of the band-shaped sound absorbing material is in the range of 1 to 10 mm, preferably 3 to 7 mm. Here, if the thickness of the band-shaped sound absorbing material is less than 1 mm, it is not preferable because the sound pressure level at a frequency of 1000 to 4000 Hz cannot be sufficiently absorbed, and if the thickness of the band-shaped absorbing material exceeds 10 mm. This is not preferable because the volume of the soundproof and fireproof double-layer pipe becomes too large. Note that the width of the band-shaped sound absorbing material can be appropriately set in consideration of the number of band-shaped sound absorbing materials to be installed, the volume ratio of a space described later, and the like.

  The band-shaped sound absorbing material can be attached to the outer peripheral surface of the inner tube by using a double-sided tape or the like. Here, the method of disposing the band-shaped sound absorbing material so that the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube do not contact with each other is not particularly limited. For example, the band-shaped sound absorbing material is disposed on the outer peripheral surface of the inner tube. Two or more belt-like sound absorbing materials can be arranged in the tube axis direction. In this case, it is preferable that two or three or more band-shaped sound absorbing materials are arranged at equal intervals on the outer peripheral surface of the inner tube. For example, when two belt-shaped sound absorbing materials are installed, three are installed at intervals of 180 ° in the cross-sectional direction of the inner tube, and when three are installed at intervals of 120 °, 90 are used. When six are installed at intervals of °, they can be installed at intervals of 60 °. Moreover, when winding a strip | belt-shaped sound-absorbing material helically in a pipe-axis direction, the 1 or 2 or more strip | belt-shaped sound absorbing material can be wound with a predetermined pitch. As another aspect, one or two or more belt-like sound absorbing materials can be spirally wound on the outer peripheral surface of the inner tube. When two or more belt-like sound absorbing materials are wound spirally, they can be spirally wound on the outer peripheral surface of the inner tube at equal intervals. For example, when two belt-like sound absorbing materials are wound spirally Can be wound at intervals of 180 ° in the cross-sectional direction of the inner tube.

  Next, in the sound insulation fireproof two-layer pipe of the present invention, the inner pipe and the outer pipe that encloses the band-shaped sound absorbing material disposed on the outer peripheral surface of the inner pipe are formed of a fiber-reinforced mortar molded pipe. The composition and the like of the fiber-reinforced mortar molded tube are not particularly limited. For example, cement is 50 to 90% by mass, preferably 60 to 70% by mass, inorganic fiber is 2 to 10% by mass, preferably 5 to 6% by mass. The organic fiber has a composition of 1 to 8% by mass, preferably 4 to 5% by mass, and the filler / filler 0 to 40% by mass, preferably 0 to 30% by mass. The outer tube encloses the inner tube and the band-shaped sound absorbing material in a state in which the inner peripheral surface of the outer tube is freely swingable with the outer surface of the band-shaped sound absorbing material disposed on the outer surface of the inner tube. It is desirable.

  The sound insulation fireproof two-layer pipe of the present invention is characterized in that a space surrounded by the outer peripheral surface of the inner tube, the band-shaped sound absorbing material, and the inner peripheral surface of the outer tube is a space. By providing the band-shaped sound absorbing material and the space, it is possible to sufficiently absorb the radiated sound from the inner tube and to suppress the propagation of vibration from the inner tube wall to the outer tube. In addition, it is preferable that the ratio of the volume of the band-shaped sound absorbing material to the total volume of the volume of the band-shaped sound absorbing material + the volume of the space is in the range of 12 to 35%, preferably 15 to 30%. Here, if the volume of the band-shaped sound absorbing material is less than 12%, it is not preferable because noise from the inside of the inner tube cannot be sufficiently absorbed, and if the volume of the band-shaped sound absorbing material exceeds 35%, This is not preferable because propagation of vibration from the tube wall cannot be sufficiently suppressed.

  Next, one embodiment of the sound insulation fireproof two-layer pipe of the present invention will be described with reference to FIG. FIG. 1 shows an example in which three strip-shaped sound absorbing materials are arranged on the outer peripheral surface of the inner tube in parallel with the tube axis direction. Three strip-shaped sound absorbing materials (2) are arranged on the outer peripheral surface of the inner tube (1) at equal intervals parallel to the tube axis direction of the inner tube (1), that is, at intervals of 120 ° in the cross-sectional direction. . In addition, the strip | belt-shaped sound-absorbing material (2) is adhere | attached on the outer peripheral surface of the inner pipe (1) with the double-sided tape. Next, on the outer peripheral surface of the band-shaped sound absorbing material (2), an outer tube (3) made of a fiber mortar molded tube is provided so as to be freely swingable with the band-shaped sound absorbing material (2).

  Another embodiment of the soundproof and fireproof double-layer pipe of the present invention will be described with reference to FIG. FIG. 2 shows an example in which one band-shaped sound absorbing material is spirally disposed on the outer peripheral surface of the inner tube. A belt-like sound absorbing material (1) is spirally wound around the outer peripheral surface of the inner tube (1). In addition, the strip | belt-shaped sound-absorbing material (2) is adhere | attached on the outer peripheral surface of the inner pipe (1) with the double-sided tape. Next, on the outer peripheral surface of the band-shaped sound absorbing material (2), an outer tube (3) made of a fiber mortar molded tube is provided so as to be freely swingable with the band-shaped sound absorbing material (2).

  In addition, the arrangement | positioning position of the strip | belt-shaped sound-absorbing material on the outer peripheral surface of an inner tube should just be an arrangement | positioning which the outer peripheral surface of an inner tube and the inner peripheral surface of an outer tube do not contact, and is arrangement | positioning shown in FIG. Of course, there is no particular limitation.

Next, the sound insulation fireproof two-layer pipe of the present invention will be further described with reference to examples.
A JIS K 6741 hard vinyl chloride pipe with an outer diameter of 114 mm and a length of 1900 mm is covered with a rock wool mat material with a thickness of 5 mm and a length of 1800 mm on the outer circumference of the hard vinyl chloride pipe in the direction of the pipe axis using double-sided tape. Pasted. The width and number of rock wool mats used are listed in Table 1 below.
Next, a fiber reinforced mortar molded tube having an inner diameter of 124 mm, an outer diameter of 140 mm, and a length of 1800 mm [cement 65% by mass, pulverized powder (product pulverized product) 10% by mass, inorganic admixture (calcium carbonate) 8% by mass, fire-resistant lightweight bone Hard chlorinated material with rock wool mat attached to 7% by mass of material (perlite), 5.5% of inorganic fiber (silicic fiber), 4.5% by mass of organic fiber (pulp and synthetic fiber)] Sound insulation and fireproof two-layer pipes were prepared by inserting vinyl pipes.
In addition, a rock wool mat material having a width of 25 mm, a thickness of 5 mm, and a length of 5400 mm is formed on a hard vinyl chloride pipe similar to the above, and spirally formed on the outer peripheral surface of the hard vinyl chloride pipe with a pitch length of 120 mm using a double-sided tape. Pasted on.
Next, a sound-proof fireproof two-layer pipe was produced by inserting a hard vinyl chloride pipe with a rock wool mat material pasted into a fiber-reinforced mortar molded pipe similar to the above.

The sound insulation properties of the drainage sound of the obtained sound insulation fireproof double-layer pipe-like sound absorbing material were tested as follows:
FIG. 3 shows an apparatus in which a sound insulation test of a sound insulation fireproof two-layer pipe is performed. The equipment shown in Fig. 3 is a piping model simulating a 9-story apartment house with a piping configuration. A special drainage joint (7) made of cast water is placed on the floor of each floor, and the test floor is used for replacement of test specimens. The SA joint (8) is installed, and a test piece (4) of a soundproof and fireproof two-layer tube is arranged through the SA joint (8). Then, two 9.5 mm thick gypsum boards (JISA6901) are stacked on the third floor of the piping model to produce a measuring room (5) with a height of 1800 mm and a width of 300 mm, and a precision sound level meter (microphone: Rion) NA-20, data recorder: TEAC RD135T, frequency analyzer: Lion SA-30), sound pressure level generated from sound insulation fire-resistant double-layer pipe and comparative product when draining water from elevated water tank (9) Was measured. The drainage method is based on SHASE-S218 (Air Conditioning and Sanitary Engineering Society Standard “Drainage Capacity Testing Method for Drainage Standpipe System for Apartment Houses”) from the 9th floor to 2.5 liters / second, the 8th floor. The water was drained at a rate of 0.83 liters / second to a total amount of 200 liters / minute.
At this time, sound pressure levels (dB) at frequencies of 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, and 4000 Hz were measured. The obtained results are also shown in Table 1.

  From the above results, the sound insulation and fireproof double-layer tube of the present invention in which the volume of the band-shaped sound absorbing material is within the range of 15 to 30% is within the frequency range of 1000 to 4000 Hz, which is said to be best heard by human ears. It can be seen that the sound pressure level generated during drainage can be absorbed efficiently. In addition, it was confirmed that the sound insulation and fireproof two-layer pipe of the present invention did not propagate vibration to the outer pipe during drainage, and the vibration was also suppressed.

  The soundproof and fireproof double-layer pipe of the present invention can be suitably used as a drain pipe for an apartment house such as an apartment or a building.

It is a figure which shows one embodiment of the sound-insulation fireproof two-layer pipe of this invention. It is a figure which shows the other embodiment of the sound insulation fireproof two-layer pipe of this invention. In an Example, it is a figure which shows the apparatus for measuring the sound absorption effect of the sound insulation fireproof two-layer pipe of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner pipe 2 Band-shaped sound-absorbing material 3 Outer pipe 4 Test body 5 Measurement room 6 Precision sound level meter 7 Special joint for drainage 8 SA joint 9 High water tank

Claims (8)

  In a fireproof two-layer pipe composed of an outer pipe made of a fiber-reinforced mortar molded pipe and a synthetic resin straight pipe or an inner pipe made of a pipe joint, a belt-like sound absorbing material is placed on the outer peripheral surface of the inner pipe. It is arranged so that the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube are not in contact with each other, and the zone surrounded by the outer peripheral surface of the inner tube, the band-shaped sound absorbing material and the inner peripheral surface of the outer tube is a space. Sound insulation fireproof double layer pipe.   The sound insulation fireproof two-layer pipe according to claim 1, wherein two or three or more belt-like sound absorbing materials are disposed in the pipe axis direction on the outer peripheral surface of the inner pipe.   The sound insulation fireproof two-layer pipe according to claim 2, wherein two or three or more belt-like sound absorbing materials are arranged at equal intervals on the outer peripheral surface of the inner pipe.   The sound insulation fireproof two-layer pipe according to claim 1, wherein one or two or more strip-shaped sound absorbing materials are spirally wound around the outer peripheral surface of the inner pipe.   The sound insulation fireproof two-layer pipe according to claim 4, wherein two or more belt-like sound absorbing materials are spirally wound around the outer peripheral surface of the inner pipe at equal intervals.   6. The outer tube includes the inner tube and the band-shaped sound absorbing material in a state in which the outer tube can swing with the outer surface of the band-shaped sound absorbing material disposed on the outer surface of the inner tube. Sound insulation and fireproof double-layer pipe as described.   The sound insulation fireproof two-layer pipe according to any one of claims 1 to 6, wherein a ratio of the volume of the band-shaped sound absorbing material to the total volume of the volume of the band-shaped sound absorbing material + the volume of the space is 12 to 35%.   The sound insulation fireproof two-layer pipe according to any one of claims 1 to 7, wherein the band-shaped sound absorbing material is rock wool.

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