JP2005207550A - Pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint having improved connecting workability between a connection cylinder portion of a joint pipe coating material and a connection pipe while fitting and connecting the connection cylinder portion of the joint to a connection port of the connection pipe in a good fashion. <P>SOLUTION: The outer peripheral face of the joint pipe having the plurality of connection ports is encircled by the coating material. The coating material, which encircles the connection cylinder portion on the side of at least the connection port of the connection ports having a smaller protruded allowance or the connection cylinder portion on the side of the connection port adjacent to the connection cylinder portion on the side of the other connection port, cylindrically extends outward from the end of the connection port in the state of covering part of the connection pipe. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pipe joint in which an outer peripheral surface of a joint pipe having a plurality of connection ports is surrounded by a covering material.

In general, in sewage fluid piping systems in kitchens, toilets, baths, washbasins, etc., there is piping noise associated with fluid movement, and in order to improve the living environment in buildings such as houses, condominiums, buildings, public facilities, In recent years, efforts have been made to reduce the noise of fluid piping systems.
Specifically, there is a technology for reducing noise in a fluid piping system by surrounding a soundproof layer in which a sound insulation layer, a vibration damping layer, and a sound absorption layer are laminated on the outer peripheral surface of the pipe (for example, Patent Documents). 1).

JP-A-10-96496 (page 2-3, FIGS. 1 to 4)

In piping with this type of soundproof layer, there are connections in the actual piping system that use a substantially Y-shaped pipe joint and the branch piping has a shallow angle with respect to the main piping. ing.
This type of pipe joint has a structure in which the branch connection cylinder part fitted and connected to the branch pipe has an extremely short protruding length from the straight pipe joint body part, and is Thus, the branch connecting tube portion is integrally formed at a shallow angle, and the soundproof layer is surrounded by the entire pipe joint.
Moreover, in the pipe joint, as post-processing after the connection in which the branch connection cylinder part and the connection pipe are fitted and connected, the tube end of the covering material on the branch connection cylinder part side and the covering material on the connection pipe side An adhesive tape is wound around the butted portion of the tube end to bring the tube ends made of the covering material into a joined state.
However, the portion where the adhesive tape is wound across the butted portion of the tube end of the covering material on the branch connecting tube side and the tube end of the connecting material on the side of the connecting tube is not able to take up sufficient tape allowance. Since the tape cannot be wound smoothly because it interferes with the pipe end of the joint body and the connecting pipe, it is difficult to wind the tape, and it takes time and effort to wind the tape carefully. There is a problem that the workability is poor.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a joint pipe covering material while satisfactorily engaging and connecting the connection tube portion of the joint and the connection port of the connection pipe. The point is to provide a pipe joint capable of improving the connection workability between the connecting tube portion and the connecting pipe side.

  The characteristic configuration of the first pipe joint according to the present invention is a connection port in which at least a protrusion margin is small among the connection ports in a configuration in which an outer peripheral surface of a joint pipe having a plurality of connection ports is surrounded by a covering material. The cover material surrounding the connection tube portion on the connection port side adjacent to the connection tube portion on the other connection port side or the connection tube portion on the other connection port side, in a state of covering a part of the connection tube, the tube outside the connection port end It is in the point extended in the shape.

  According to the above-mentioned characteristic configuration, in a state where the connecting pipe is fitted and connected to the connecting tube portion that extends the covering material outward from the connection port end, the tube end of the covering material is separated from the pipe joint by the protrusion amount. At a position on the side of the connecting pipe that is far away, that is, at a position away from the connecting cylinder on the side of the connecting port adjacent to the connecting cylinder on the side of the connecting port or the connecting cylinder on the side of the other connecting port with a small protrusion margin in the pipe joint, The tube end of the covering material and the connecting pipe side, for example, in a state where the winding allowance of the tape is sufficiently secured, the tape is not difficult across the tube end of the covering material on the pipe joint side and the connecting tube side, In addition, the tape can be wound without interfering with the joint body.

  Therefore, it is possible to carry out the connection work between the tube end of the covering material and the connection pipe side with good workability while achieving the fitting connection between the connection port of the pipe joint and the connection pipe, thereby improving workability in pipe connection. Can be achieved.

  As a characteristic configuration of the second pipe joint of the present invention, in the configuration in which the outer peripheral surface of the joint pipe provided with a plurality of connection ports is surrounded by a coating material, Covering the connection tube part on the connection port side with a factor that hinders the winding operation of the tape covering the joint with the cover material on the connection pipe side. Is also in the form of a cylindrical extension outward.

  According to the above-mentioned characteristic configuration, in a state where the connecting pipe is fitted and connected to the connecting tube portion that extends the covering material outward from the connection port end, the tube end of the covering material is separated from the pipe joint by the protrusion amount. In a state of being located on the side of the connecting pipe that is far away, that is, on the side of the connecting port having a factor that hinders the winding operation of the tape covering the abutting portion of the pipe joint side covering material and the connecting pipe side covering material in the pipe joint. At a position away from the connecting tube portion, the tube end of the covering material and the connecting tube side, for example, in a state in which the winding margin of the tape is sufficiently secured, the tube end of the covering material on the pipe joint side and the connecting tube side Thus, the tape can be wound without any difficulty and without interfering with the joint body side.

Therefore, it is possible to easily perform the connection work between the tube end of the covering material and the connection pipe side while fitting and connecting the connection port of the pipe joint and the connection pipe, thereby improving the workability in the pipe connection. Can be planned.
In addition, with a sufficient tape winding allowance, the tube end of the coating material on the pipe joint side and the connecting pipe side can be tightly wound to obtain a stable joined state. However, there is no variation in the performance of the coating material due to the piping work, compared to a joint state in which winding is unstable and winding is unstable.
Here, the factor that hinders the winding operation of the tape that covers the abutting portion of the covering material on the pipe joint side and the covering material on the connection pipe side is the tape, such as the connection tube portion on the connection port side where the protrusion margin is small. If there is not enough winding allowance, the connection cylinder part interferes with the winding of the tape and is difficult to wind like the connection cylinder part on the connection port side close to the connection cylinder part on the other connection port side. In this case, there is a connection cylinder part on the connection port side having a small protrusion allowance, and in addition, the winding allowance of the tape is reduced like the connection cylinder part on the connection port side close to the connection cylinder part on the other connection port side This refers to the case where it cannot be removed sufficiently and the connecting cylinder part is difficult to wind due to interference with winding of the tape.

  The third feature of the pipe joint of the present invention is that the covering material covering the outer peripheral surface of the connecting pipe is peeled off from the pipe end by the sum of the fitting connection allowance of the pipe joint and the protrusion allowance of the covering material. There is a point.

  According to the above characteristic configuration, in a state where the connecting pipe is fitted and connected to the connecting tube portion of the pipe joint that extends the covering material outward from the connecting port end, in the portion peeled from the pipe end of the connecting pipe. The protruding connecting tube portion on the pipe joint side is in a state of covering the outer fitting state, so that the connecting tube end in the pipe joint and the peeling start end on the connecting tube side can be brought into a butted state. Both the covering material portions can be connected by tape winding.

  Accordingly, since the connecting pipe that forms the peeling structure of the corresponding covering material can be fitted and connected to the pipe joint from which the covering material is extended, quick pipe connection is possible, and piping workability and piping The workability can be improved.

  The characteristic configuration of the fourth pipe joint of the present invention is that the covering material is composed of a plurality of layers of at least a vibration damping sound insulation layer and a sound absorption layer.

  According to the above characteristic configuration, in general use piping, the sound of fluid flowing in the pipe, so-called air vibration sound, and the sound generated by the vibration of the pipe itself when the liquid flow hits the pipe, so-called solid vibration sound For such a generated sound source, the air vibration sound can be absorbed by the sound absorption layer, the solid vibration sound can be absorbed by the vibration suppression and sound insulation layer, and the air vibration sound can be reflected to the inner side of the pipe.

  Therefore, the sound transmitted to the outside from the covering material can be surely attenuated, and the sound insulation quality can be improved.

  The characteristic configuration of the fifth pipe joint of the present invention is that the vibration-damping and sound-insulating layer of the covering material is disposed inward of the sound-absorbing layer.

According to the above characteristic configuration, the air vibration sound that has not been absorbed by the air layer by the vibration suppression and sound insulation layer is reflected again to the sound absorption layer on the inner side, thereby efficiently attenuating the air vibration sound generated from the pipe side. Can do.
Therefore, the noise reduction effect of the fluid piping system can be improved.

  The characteristic configuration of the sixth pipe joint of the present invention is that the sound absorbing layer of the covering material is made of non-combustible inorganic fiber felt.

  According to the above-described feature configuration, it has been experimentally known that the inorganic fiber felt has a better absorption effect on the high frequency component (about 1000 Hz to about 4000 Hz) than the low frequency component (about several Hz to about 1000 Hz) in the audio frequency component. . Here, for example, in the case of a drain pipe or the like, it is known that the noise level becomes higher as the frequency becomes higher.

  Therefore, since the noise reduction effect in the audible frequency range that is easy to hear is good, the piping noise can be effectively attenuated, and the noise reduction effect of the fluid piping system can be improved.

Hereinafter, a pipe joint to which the present invention is applied will be described with reference to the drawings.
Embodiment
This embodiment demonstrates the example which applied this invention to the substantially Y-shaped pipe joint A by which the connection cylinder part by which a connection pipe is branched-connected with respect to a straight tubular main piping is integrally formed.
Specifically, pipe joints used in fluid piping systems such as hard vinyl chloride pipe joints for drainage, hard vinyl chloride pipe joints for water supply, heat-resistant hard vinyl chloride pipe joints, and hard vinyl chloride pipes for drainage, for water supply It is applied to pipes used in fluid piping systems such as hard vinyl chloride pipes and heat-resistant hard vinyl chloride pipes.
As shown in FIGS. 1 and 2, the pipe joint A has a branch connection tube portion 2 having the same inner diameter at a 45 degree angle with respect to the straight tubular joint body portion 1. It is integrally formed with a small projecting allowance (length), and is formed in a branching state in which the branching connecting cylinder part 2 is close to the connecting cylinder part 1A of one of the joint body parts 1 and the joint. The covering material 3 is surrounded by the entire outer surface of the main body 1 and the branch connection cylinder.

  The pipe joint A includes a plurality of connection ports such as connection ports 1C and 1D at both ends of the joint main body 1 and a connection port 2A at the pipe end of the branch connection cylinder portion 2. Corresponding to the connection port 1 </ b> C and the branch connection tube portion 2 </ b> A that is a connection tube portion, the covering material is extended in a cylindrical shape outward from the connection port end. In this embodiment, the cylinder allowance of the covering cylinder portions 3A and 3B is formed to be about 20 mm, for example, to ensure a sufficient adhesive allowance for the tape.

  The connection ports 1C, 1D, and 2A of the pipe joint A are formed in connection inner allowances 1E, 1F, and 2B having an inner diameter corresponding to the outer diameter of the pipe end portion of the connection pipe 4 that is a connection partner. Connected to the ports 1C, 1D, and 2A in a state where at least the adhesive 5 is applied to the outer peripheral surface 4A of the pipe end portion of the connecting pipe 4 or the adhesive 5 is applied to the inner peripheral surface of the connection inner wall. By inserting the tube end portion of the tube 4, both can be fitted and connected.

  On the other hand, the connecting pipe 4 which is a connection partner is surrounded by the covering material 6 similarly to the pipe joint A except for the pipe end portion 4A. That is, in the connecting pipe 4, the covering material 6 is formed in a peeled state from the pipe end by the sum of the connecting inner allowances 1E, 1F, 2B of the pipe joint and the protruding allowances of the covering tube portions 3A, 3B. In a state in which the connection pipe 4 is fitted and connected to the connection ports 1C, 1D, and 2A of the pipe joint A, as shown in FIG. The covering material 3 on the pipe joint A side and the covering material 6 on the connection pipe 4 side are in a butted state at a position separated by the length of the allowance, and the covering material 3 on the pipe joint A side and the connecting pipe straddling this butted portion The covering material 6 on the 4th side is wound with the adhesive tape 7 so that the covering material portion of the pipe joint A and the connecting pipe 4 can be brought into a joined state.

  As shown in FIG. 1, the covering material 3 surrounded by the pipe joint A has a two-layer structure in which a sound absorbing layer 3A is provided on the inner side and a vibration damping and sound insulating layer 3B is provided on the outer side. In the embodiment, the sound absorbing layer 3A is made of rock wool felt, which is rock wool processed into a felt shape, which is an inorganic fiber having a thickness of about 5 mm, for example, and the vibration damping and sound insulating layer 3B Modified asphalt mixed material forming layer 3Ba mixed with high specific gravity ferrule (alumina, calcium carbonate, titanium oxide, magnesium oxide, zinc oxide, iron oxide, talc, barite, graphite, etc.) and outer The synthetic resin nonwoven fabric forming layer 3Bb is composed of a laminated layer of about 2.5 mm. Here, the rock wool felt used for the sound absorbing layer 3A and the modified asphalt composite material used for the vibration damping sound insulating layer 3B are nonflammable materials.

  As shown in FIG. 1, the covering material 6 surrounded by the connecting pipe 4 has a two-layer structure in which a sound absorbing layer 6A is provided on the inner side and a vibration damping and sound insulating layer 6B is provided on the outer side as in the case of the pipe joint A. In this embodiment, the sound absorbing layer 6A includes, for example, a glass wool felt layer 6Aa using glass wool processed into a felt shape which is an inorganic fiber having a thickness of about 5 mm, and an outer synthetic layer. The resin nonwoven fabric forming layer 6Ab is composed of a laminated layer having a thickness of about 5 mm. , Zinc oxide, iron oxide, talc, barite, graphite, etc.) and a modified asphalt mixture forming layer 6Ba and an outer synthetic resin nonwoven fabric forming layer 6Bb of about 2.5 mm. It is composed of laminated layers. Here, the glass wool felt used for the sound absorbing layer 6A and the modified asphalt composite material used for the vibration damping sound insulating layer 6B are nonflammable materials.

  The sound absorbing layers 3A and 6A of the covering material 3 in the pipe joint A and the connecting pipe 4 use inorganic fiber felt as a material structure, and the sound absorption performance increases as the audible frequency component increases. have.

  As the adhesive tape 7, a tape base mainly composed of a refractory material and a pressure sensitive adhesive such as butyl rubber applied thereto is preferably used.

If it is such a structure, after apply | coating the adhesive agent 5 to the pipe end outer peripheral part of the connection pipe 4 with respect to the connection ports 1A and 1B of the joint main-body part 1, the connection pipe 4 to 1A and 1B to these connection ports After applying the adhesive 5 to the outer peripheral portion of the connecting pipe 4 for the fitting connection and the connecting port 2A of the branch connecting cylinder part 2, the pipe end portion is connected to the connecting port 2A. The pipe end portion of the connecting pipe 4 is inserted and fitted and connected.
Next, each butted portion of the coating material 3 on the pipe joint A side and the peeling end of the coating material 6 on the connection pipe 4 side is straddled across the coating material 3 on the pipe joint side and the coating material 6 on the connection pipe 4 side. The adhesive tape 7 is wound to bring the cylindrical ends made of the covering materials 3 and 6 into a joined state.

  In the branch connection cylinder portion 2 branched from the joint main body portion 1, the abutting portion with the covering material 3 on the side of the contact pipe 4 is the extension of the covering material from the tube end of the branch connection cylinder portion 2. However, since it is at a position away from the joint main body 1, that is, at a position away from about 20 mm in this embodiment, the width capable of satisfactorily bonding the covering materials 3, 6 is about 65 mm. The tape 7 can be used, and the tape can be wound at a position where there is no obstacle that hinders the tape winding operation.

[Another embodiment]
1) In each of the above-described embodiments, the branch connecting tube portion 2 having the same inner diameter as the joint main body portion 1 and having a small projecting margin with an angle of 45 degrees with respect to the straight pipe joint main body portion is divided. The example in which the present invention is applied to the branch pipe joint A has been described. However, the present invention is not limited to this, and the projection allowance of a branch pipe with an angle of 45 degrees with respect to the straight tubular joint main body is provided. A small number of pipe joints A may be used in which the branch connecting cylinder part 2 having an inner diameter different from that of the joint body part 1 is branched.
Further, as shown in FIG. 3, the branch pipes 2 and 2 have a branching angle of 45 degrees with respect to the straight pipe joint main body 1 and have a small projecting allowance and the same inner diameter as the joint main body 1. Different from the pipe joint A in which the cylindrical parts 2 and 2 are branched, and the two pipes 2 and 2 having a 45 ° angle with respect to the straight pipe joint main body 1 and having a small projection allowance, and different from the joint main body 1 You may apply to the pipe joint A where the branch connection cylinder parts 2 and 2 of an internal diameter branch.

2) As shown in FIG. 4, the branch connecting tube portion 2 having the same inner diameter as the joint main body portion 1, with a branching tube having a 90 ° angle with respect to the straight tubular joint main body portion 1 and having a small projection allowance. A pipe joint A that branches off, and a joint main body having a small projecting margin at an angle of 90 degrees with respect to the straight pipe joint main body 1 as shown in FIG. The present invention may be applied to a pipe joint A in which the branch connection cylinder portion 2 having the same inner diameter as the portion 1 branches.
In this case, the present invention is applied to the branch connection cylinder part 2 of the joint body part 1 and the connection pipe 4 and the fitting part corresponding thereto.
Further, in the present invention, the branch connecting tube portion 2 having an inner diameter different from that of the joint body portion 1 and having a small projecting margin with a 90 ° angle of one branch pipe with respect to the straight tubular joint body portion 1 is divided. Branch connection of the inner diameter different from that of the joint main body part 1 with a branch margin of 90 degrees and a small projecting margin with respect to the branch pipe joint A and the straight pipe joint main body part 1 You may apply this invention to the pipe joint A from which the cylinder part 2 branches.

3) Further, as shown in FIG. 6, the present invention may be applied to a pipe joint A in which connection ports are close to each other with an elbow of 90 degrees.
In this case, the present invention is applied to the fitting portion between the connecting tube portions 1G, 1H at both ends and the connecting pipe 4, and in the connected state with the connecting pipe 4, the covering material 3 on the pipe joint body 1 side and the connecting pipe 4 is located on the side of the connecting pipe 4 that is spaced outward from the connection ports 1I and 1J by the amount of protrusion of the covering cylinder portions 3G and 3H. 7 in a state in which the winding allowance of 7 is sufficiently secured, the tape 7 is not difficult to straddle both the covering materials 3 and 6, and the tape 7 is not interfered with the connection ports 1G and 1H of the adjacent joint body 1 The winding work can be done.
In addition, in each said another embodiment, the same code | symbol is attached | subjected to the same component as the said embodiment, and the detail is abbreviate | omitted.

Exploded sectional view showing a state before fitting in a substantially Y-shaped pipe joint and connecting pipe to which the present invention is applied Sectional drawing which shows the state which connected the connecting pipe to the pipe joint Sectional drawing which shows the pipe joint of another embodiment to which this invention is applied in a fitting state with a connecting pipe Sectional drawing which shows the pipe joint of another different embodiment to which this invention is applied in a fitting state with a connection pipe Sectional drawing which shows the pipe joint of another different another embodiment to which this invention is applied in a fitting state with a connecting pipe. Sectional drawing which shows the pipe joint of another different embodiment which applied this invention in another fitting state with a connection pipe.

Explanation of symbols

A Pipe joint 1 Pipe joint 1A, 1B Connection cylinder part 1G, 1H Connection cylinder part 1I, 1J Connection port 2 Connection pipe 2A Connection cylinder part 2B Connection port 3 Coating material 6 Coating material 7 Tape

Claims (6)

A pipe joint in which the outer peripheral surface of a joint pipe provided with a plurality of connection ports is surrounded by a covering material,
Among the connection ports, a covering material surrounding the connection tube portion on the connection port side adjacent to the connection tube portion on the connection port side or the connection tube portion on the other connection port side having at least a small projection allowance is part of the connection tube. A pipe joint that extends in a cylindrical shape outward from the connection port end in a state of covering. A pipe joint in which the outer peripheral surface of a joint pipe provided with a plurality of connection ports is surrounded by a covering material,
Of the connection port, a covering material that surrounds the connection tube portion on the connection port side having a factor that hinders the winding operation of the tape that covers the abutting portion between the covering material on the pipe joint side and the covering material on the connection pipe side A pipe joint that extends in a cylindrical shape outward from the connection port in a state of covering a part of the connection pipe.   The connecting pipe used for the pipe joint according to claim 1 or 2, wherein the covering material covering the outer peripheral surface of the connecting pipe is the sum of the fitting connection allowance of the pipe joint and the protrusion allowance of the covering material. A pipe joint peeled off from the end.   The pipe joint according to claim 1 or 2, wherein the covering material is composed of a plurality of layers of at least a vibration damping sound insulation layer and a sound absorption layer.   The pipe joint according to claim 4, wherein the vibration-damping and sound-insulating layer of the covering material is disposed inward of the sound-absorbing layer. The pipe joint according to claim 4 or 5, wherein the sound-absorbing layer of the covering material is composed of an incombustible inorganic fiber felt.

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