JP2018127766A - Pipe joint and leg joint - Google Patents

Abstract

CONSTITUTION: A pipe joint 10 includes a joint body 20 and is used in a drain piping(100) penetrating a fire compartment(102) of a building. An opening portion 22 penetrating in a thickness direction is formed on a side wall of the joint body, and the opening portion is provided with a housing portion 24 housing a thermal expansion material 66 inside. An outward expansion restricting portion 52 restricting outward expansion of the thermal expansion material is provided on an outer face side of the housing portion.EFFECT: A drain pipeline can be properly closed even when diameter of a drain pipeline is large because a pipe member is not crushed from the outside.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a pipe joint and a leg joint, and more particularly to a pipe joint and a leg joint used for drainage piping penetrating a fire prevention section of a building, for example.

An example of a conventional drainage pipe structure that penetrates a fire prevention section of a building is disclosed in Patent Document 1. In the technique of Patent Document 1, a non-combustible pipe material is provided so as to penetrate the upper floor and the lower floor of a floor slab (fire prevention section), and a combustible pipe material (synthetic resin stand pipe) is provided at the lower end portion of the non-combustible pipe material. Member) is connected. And the member for drain piping is attached to the connection part of a nonflammable pipe material and a combustible pipe material. This drain piping member includes a non-flammable member main body that surrounds the outside of the pipe end of the combustible pipe material, and a thermally expandable refractory material (thermal expansion material) provided on the inner peripheral side of the member main body. In the event of a fire, the thermal expansion material expands to close the drain pipe, thereby blocking flames, smoke, toxic gases, and the like to prevent the spread of fire.
JP 2008-112413 A

  In the technique of Patent Document 1, a drain pipe is closed by crushing a synthetic resin standing pipe member from the outside using a thermal expansion material. For this reason, when the diameter of a standing tube member becomes large, it will become difficult to crush a standing tube member, and there exists a possibility that a drainage pipe line cannot be closed appropriately. That is, when the diameter of the riser member is large, the space to be closed increases and the amount of the synthetic resin inside the thermal expansion material increases. Moreover, the burning residue of the synthetic resin becomes a resistance when closing the drain pipe. Therefore, in the configuration in which the standing pipe member is crushed from the outside by the thermal expansion material, the drainage pipe may be incompletely blocked.

  Moreover, in the technique of patent document 1, since the standing pipe member connected to the lower end part of the nonflammable pipe material which protrudes below from a fire prevention division is crushed, a predetermined height dimension (longitudinal pipe length) is required. In some cases, the space under the floor on the lowest floor, where the height is restricted, cannot be used due to poor fit.

  Therefore, the main object of the present invention is to provide a novel pipe joint and leg joint.

  Another object of the present invention is to provide a pipe joint and a leg joint that can appropriately close a drain pipe.

  1st invention is a pipe joint used for the drainage piping which penetrates the fire prevention division of a building, Comprising: It forms in the side wall of a joint main body and a joint main body, and is provided in the opening part and opening part which penetrate a side wall in the thickness direction. The pipe joint includes a housing part in which the thermal expansion material is housed, and an outer expansion regulating part that is provided on the outer surface side of the housing part and regulates the outward expansion of the thermal expansion material.

  In the first invention, the pipe joint includes a joint main body and is used for a drain pipe penetrating a fire prevention section of a building to constitute a part of the drain pipe. An opening that penetrates in the thickness direction is formed in the side wall of the joint body. The opening is provided with an accommodating portion in which the thermal expansion material is accommodated, and an outer expansion regulating portion for restricting the outward expansion of the thermal expansion material is provided on the outer surface side of the accommodating portion.

  According to the first aspect of the invention, the internal pipe line of the joint body is closed without crushing the pipe member from the outside. Therefore, even when the diameter of the drain pipe is large, the drain pipe can be appropriately closed. . Further, since the vertical pipe member for crushing is unnecessary, the length of the pipe in the vertical direction can be suppressed, and it can be used well in a floor space on the lowest floor with a height restriction.

  A second invention is dependent on the first invention, and the accommodating portion is constituted by a lid body detachably attached to the opening.

  According to the second invention, even if there is some trouble in the storage unit including the thermal expansion material, it can be dealt with only by replacing the cover without replacing the joint body.

  A third invention is dependent on the second invention, the joint body has a cleaning port, and the cleaning port is used as the opening.

  According to the third aspect of the invention, the main part of a commercially available leg joint with a cleaning port can be used as it is, so that the manufacturing cost of the pipe joint can be reduced. In addition, it is possible to inspect and clean the drain piping.

  A fourth invention is a leg joint for connecting a drainage stack and a drainage horizontal pipe, which is used for drainage pipes penetrating a fire prevention section of a building, and is attachable to and detachable from a joint body having a cleaning port and a cleaning port Leg joint including a cleaning mouth cover to be attached, a thermal expansion material housed inside the cleaning mouth lid, and an outer expansion restriction portion that is provided on the outer surface side of the cleaning mouth lid and restricts the outward expansion of the thermal expansion material It is.

  In the fourth invention, the leg joint includes a joint main body and is used for drainage piping penetrating the fire prevention section of the building to connect the drainage stack and the drainage horizontal pipe. The joint body is formed with a cleaning port that penetrates the side wall in the thickness direction. A cleaning mouth lid is detachably attached to the cleaning mouth. And a thermal expansion material is accommodated in the inside of a cleaning mouth cover, and the outer expansion regulation part which controls expansion | swelling to the outward of a thermal expansion material is provided in the outer surface side of a cleaning mouth cover.

  According to the fourth invention, the same effect as the first invention can be achieved, and the drainage pipe can be appropriately closed even when the diameter of the drainage pipe is large. In addition, since the length of the pipe in the vertical direction can be suppressed, it can be used in a well-understood space on the lowest floor with a height restriction.

  Moreover, even if there is some trouble with the cleaning mouth cover provided with the thermal expansion material, it can be dealt with by simply replacing the cleaning mouth cover without replacing the joint body. Furthermore, since the main-body part of a commercially available leg joint with a cleaning port can be used as it is, the manufacturing cost of a pipe joint can be reduced.

  According to the present invention, the internal pipe line of the joint body is closed without crushing the pipe member from the outside, so that the drain pipe can be appropriately closed even when the diameter of the drain pipe is large. Further, since the vertical pipe member for crushing is unnecessary, the length of the pipe in the vertical direction can be suppressed, and it can be used well in a floor space on the lowest floor with a height restriction.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is an illustration figure which shows a mode that drainage piping which penetrates a fire prevention division was piped using the pipe joint which is one Example of this invention. It is a front view which shows the pipe joint of FIG. It is a side view which shows the pipe joint of FIG. It is sectional drawing which shows the cross section in the IV-IV line of FIG. 2 of the pipe joint of FIG. It is sectional drawing which shows the cleaning mouth cover with which the pipe joint of FIG. 1 is provided. It is sectional drawing which shows typically a mode that the pipe line in a pipe joint was obstruct | occluded with the thermal expansion material. It is sectional drawing which shows the pipe joint which is another Example of this invention. It is sectional drawing which shows the pipe joint which is further another Example of this invention. It is an illustration figure which shows a mode that drainage piping which penetrates a fire prevention division was piped using the pipe joint which is further another Example of this invention. It is a front view which shows the pipe joint of FIG. It is an illustration figure which shows a mode that drainage piping which penetrates a fire prevention division was piped using the pipe joint which is further another Example of this invention. It is an illustration figure which shows a mode that drainage piping which penetrates a fire prevention division was piped using the pipe joint which is further another Example of this invention. It is an illustration figure which shows a mode that drainage piping which penetrates a fire prevention division was piped using the pipe joint which is further another Example of this invention. It is an illustration figure which shows a mode that drainage piping which penetrates a fire prevention division was piped using the pipe joint which is further another Example of this invention.

  Referring to FIG. 1, a pipe joint 10 according to an embodiment of the present invention is used for a drain pipe 100 penetrating a fire prevention section 102 of a building such as a condominium, a hotel, and an office building, and a part of the drain pipe 100. Configure. In this embodiment, the pipe joint 10 is a neck-type leg joint that connects the lower end of the drainage standpipe 104 and the upstream end of the drainage horizontal main pipe 106, and is a fireproof compartment (floor slab on the lowest floor). A pipe is provided so as to penetrate through a through hole 102 a formed in 102.

  The drainage standpipe 104 and the drainage horizontal main pipe 106 are made of a synthetic resin such as hard vinyl chloride, and a nonflammable material such as mortar is provided between the outer peripheral surface of the pipe joint 10 and the inner peripheral surface of the through hole 102a. Filler 108 is filled. Moreover, although illustration is abbreviate | omitted, the drainage piping 100 is fixed to the fire prevention compartment 102 etc. using a support metal fitting as needed. Furthermore, the outer surface of the drain pipe 100 may be covered with a sound insulating material or a heat insulating material.

  As shown in FIGS. 2 to 4, the pipe joint 10 includes a joint body 20 having a cleaning port 22, and a cleaning port lid 24 which is a lid body detachably attached to the cleaning port 22.

  The joint body 20 is formed of a metal (noncombustible material) such as cast iron, and includes a curved pipe portion 26 that is bent at 90 degrees and a vertical pipe portion 28 that extends upward from an upstream end of the curved pipe portion 26. Further, both ends of the joint body 20 are provided with mechanical pipe connection portions 30 having a receiving port 32, a flange portion 34, a push ring 36, a fastening bolt 38, and the like. A vertical pipe 104 or a horizontal drain main pipe 106 is connected. However, the structure or type of the pipe connecting portion 30 can be changed as appropriate. The inner diameter of the curved pipe portion 26 is set according to the inner diameter of the drainage horizontal main pipe 106, and is, for example, 146 mm. Moreover, the internal diameter of the vertical pipe part 28 is set according to the internal diameter of the drainage stack 104, and is 107 mm, for example.

  The cleaning port 22 is a short cylindrical opening formed in the side wall of the curved pipe portion 26 of the joint body 20, and is formed so as to penetrate the side wall of the curved pipe portion 26 in the thickness direction. In this embodiment, the two cleaning ports 22 are arranged opposite to the side portion of the curved pipe portion 26 and open in directions orthogonal to the axial directions of the drainage stack 104 and the drainage horizontal main pipe 106. The inner diameter of the cleaning port 22 is, for example, 75 mm. A plurality of bolt holes (not shown) into which mounting bolts 40 to be described later are screwed are formed on the end face of the cleaning port 22 so as to be arranged in the circumferential direction.

  As such a joint main body 20, a main body portion of a commercially available leg joint with a cleaning port (for example, “CO neck length L bend (trade name)” manufactured and sold by the applicant of the present application) can be used as it is.

  Referring to FIG. 5 together with FIGS. 2 to 4, the cleaning mouth cap 24 includes an inner lid portion 50 made of a synthetic resin such as hard vinyl chloride and an outer lid portion 52 made of a metal such as cast iron. The inner lid portion 50 is provided on the inner surface side of the cleaning port lid 24, and the outer lid portion 52 is provided on the outer surface side of the cleaning port lid 24.

  The inner lid part 50 has an insertion cylinder part 54 formed in a short cylindrical shape. The insertion cylinder portion 54 has an outer diameter slightly smaller than the inner diameter of the cleaning port 22 and can be inserted into the cleaning port 22. An annular flange portion 56 is formed at the end on the rear end side (outer surface side) in the insertion direction of the insertion cylinder portion 54 so as to expand outward. The outer diameter of the flange portion 56 is set to be approximately the same as the outer diameter of the cleaning port 22. The flange portion 56 has an insertion hole (not shown) for inserting the mounting bolt 40 in the cleaning port 22. It is formed at a position corresponding to the bolt hole to be formed.

  A closing portion 58 that closes the insertion tube portion 54 is provided at the end of the insertion tube portion 54 on the distal end side (inner surface side) in the insertion direction. The blocking portion 58 is formed in a curved plate shape so as to be continuous with the inner surface of the curved pipe portion 26 of the joint body 20 when the cleaning port lid 24 is attached to the cleaning port 22. Note that the shape of the end portion on the distal end side in the insertion direction of the insertion tube portion 54 is formed along the outer peripheral portion of the closing portion 58. The thickness of the blocking portion 58 may be a minimum thickness that can withstand erosion due to drainage flowing down the drainage pipe 100 or wear during cleaning in the pipe, for example, 2 to 4 mm.

  The outer lid portion 52 is a portion that seals the opening on the outer surface side of the inner lid portion 50. In this embodiment, the outer lid portion 52 is also an outer expansion regulating portion that regulates outward expansion of a thermal expansion material 66 described later. . The outer lid portion 52 includes a sealing portion 60 formed in a bottomed short cylindrical shape, and an annular flange portion 62 that extends outward from the inner surface side end portion of the sealing portion 60. In the flange portion 62, an insertion hole (not shown) for inserting the mounting bolt 40 is formed at a position corresponding to the bolt hole formed in the cleaning port 22. The thickness of the outer lid portion 52 is set to a thickness having a strength capable of reliably restricting the outward expansion of the thermal expansion material 66, and is, for example, 4 to 8 mm.

  The substantially cylindrical thermal expansion material 66 is accommodated in the cleaning port lid 24, that is, in a space formed by the inner lid portion 50 and the outer lid portion 52. That is, in this embodiment, the accommodating portion in which the thermal expansion material 66 is accommodated is constituted by the cleaning port lid 24, and the cleaning port 22 is used as an opening for providing the accommodating portion.

  The thermal expansion material 66 is made of a rubber-based material or a resin material containing thermal expansion graphite. For example, the thermal expansion material 66 is thermally expanded when its temperature reaches 200 ° C. or more, and its volume expands 5 to 40 times. Is used. In this embodiment, as the thermal expansion material 66, a thermal expansion refractory material manufactured by CRK Co., Ltd. is used.

  The cleaning port lid 24 as described above passes through the insertion holes formed in the flange portions 56 and 62 of the inner lid portion 50 and the outer lid portion 52, and screws the mounting bolts 40 into the bolt holes of the cleaning port 22. By fitting them, they are attached to the cleaning port 22. At this time, an annular seal member 68 formed of an elastic material such as rubber is provided between the end face of the cleaning port 22 and the flange portion 56 of the inner lid portion 50. Thereby, the watertightness between the cleaning port 22 and the cleaning port lid 24 is ensured. In addition, the inner cover part 50 and the outer cover part 52 of the cleaning mouth cover 24 may be integrated by adhering the flange parts 56 and 62 to each other, or when attached to the cleaning mouth 22 using the mounting bolt 40. In addition, the flange portions 56 and 62 may be integrated by being crimped together.

  In such a pipe joint 10, for example, when a fire occurs in an underfloor space, as shown in FIG. 6, the thermal expansion material 66 expands due to the heat of the fire, and the internal pipe line of the metal joint body 20 that remains unburned. Occlude. As a result, heat, flame, smoke, toxic gas, and the like generated in the underfloor space are prevented from reaching the upper space through the drain pipe 100 (drain pipe), thereby preventing the spread of fire. At this time, the thermal expansion material 66 only breaks through the thin closed portion 58 softened by the heat at the time of the fire, and the outward expansion is regulated by the outer lid portion (external expansion regulating portion) 52. Therefore, the inner pipe line of the joint body 20 can be quickly closed by spreading easily and quickly in the joint body 20.

  When the inspection or cleaning of the drain pipe 100 is performed, the cleaning port lid 24 is removed and the cleaning port 22 is opened.

  As described above, according to this embodiment, the inner pipe of the joint body 20 is closed without crushing a pipe member such as the drainage standpipe 104 from the outside, so even when the diameter of the drain pipe is large, The drainage pipe can be properly blocked, and the fire spread prevention function is properly exhibited. Further, since the vertical pipe member for crushing is unnecessary, the length of the pipe in the vertical direction can be suppressed, and it can be used well in a floor space on the lowest floor with a height restriction.

  Further, according to this embodiment, the main body part of a commercially available leg joint with a cleaning port can be used as it is, and it has a function to prevent the spread of fire by simply replacing the conventional cleaning port cover with the cleaning port cover 24 containing the thermal expansion material 66. Can be made. That is, since the joint main body 20 of the pipe joint 10 can be shared with the main body part of the joint with a cleaning port that does not have a fire spread prevention function, the manufacturing cost of the pipe joint 10 can be reduced. Further, even if there is some trouble with the cleaning mouth cover 24 provided with the thermal expansion material 66, it can be dealt with only by replacing the cleaning mouth cover 24 without replacing the joint body 20. Furthermore, since the pipe joint 10 has the cleaning port 22, the drainage pipe 100 can be inspected and cleaned.

  Furthermore, according to this embodiment, since it is possible to prevent the spread of fire at the portion of the pipe joint 10, it is necessary to pipe within 1 meter from the pipe portion penetrating the fire prevention section 102 in the building with a fireproof double-layer pipe or a metal pipe. Thus, the piping members such as the drainage stack 104 and the drainage horizontal main pipe 106 can be made of combustible synthetic resin. Therefore, the construction cost of the drainage pipe 100 can be reduced. However, the materials of the piping members such as the drainage stack 104 and the drainage horizontal main pipe 106 are not limited to those made of synthetic resin.

  In the above-described embodiment, the joint body 20 is provided with the two cleaning ports (openings) 22 and the cleaning port lid (accommodating unit) 24. However, the number and arrangement positions of the cleaning ports 22 and the cleaning port lids 24 are as follows. These can be changed as appropriate. For example, only one cleaning port 22 and cleaning port lid 24 may be provided on the joint body 20 according to the diameter of the joint body 20, or three or more may be provided so as to be aligned in the circumferential direction. Good. Further, for example, the cleaning port lid 24 containing the thermal expansion material 66 may be attached to only one of the two cleaning ports 22.

  In the above-described embodiment, in order to increase the capacity of the thermal expansion material 66, the outer lid portion 52 is formed in a bottomed cylindrical shape. However, as shown in FIG. May be formed.

  Furthermore, in the above-described embodiment, the cleaning port lid 24 is attached to the cleaning port 22 using the mounting bolt 40, but the present invention is not limited to this. For example, as shown in FIG. 8, a screw groove 70 may be formed on the outer surface of the insertion tube portion 54 of the inner lid portion 50, and the cleaning port lid 24 may be attached to the cleaning port 22 using a screw method. Moreover, the bayonet system which completes mounting | wearing and positioning of the cleaning mouth cover 24 by inserting the cleaning mouth cover 24 in the cleaning mouth 22 and twisting can also be used.

  Furthermore, in the above-described embodiment, the outer lid portion 52 of the cleaning port lid 24 is made of metal. However, as shown in FIG. 8, the outer lid portion 52 may be made of synthetic resin. In this case, for example, a metal flat plate member 72 may be provided on the inner surface side of the outer lid portion 52 as an outer expansion regulating portion that regulates the outward expansion of the thermal expansion material 66.

  Moreover, in the above-mentioned Example, although the cleaning port 22 was used as an opening part for providing an accommodating part, the opening part formed in the coupling main body 20 does not necessarily need to be a cleaning port. When the opening is not a cleaning port, the housing provided in the opening does not necessarily need to be detachable from the opening, and may be fixed so as not to be removed. Moreover, the shape of the opening is not necessarily cylindrical.

  Furthermore, in the above-described embodiment, as the pipe joint 10, the neck type leg joint that is piped so as to pass through the through hole 102a of the fire prevention section 102 is illustrated, but the type or specific shape of the pipe joint 10 is as follows. There is no particular limitation. For example, the curved pipe portion 26 of the joint body 20 may have a shape that gradually increases in diameter toward the drainage horizontal main pipe 106 side. For example, as shown in FIG. 9 and FIG. 10, the pipe joint 10 may be a leg joint having a joint body 20 formed in a curved pipe that is bent at 90 degrees, and another pipe joint 110 and It may be piped in combination. In the example shown in FIG. 9, another pipe joint 110 is a metal collective joint having a branch pipe part 110 b to which a drain side branch pipe 112 is connected, and the main pipe part 110 a is a through-hole of the fire prevention compartment 102. Piped so as to penetrate 102a. And the pipe connection part 30 of the pipe joint 10 is connected with the lower end part of the pipe joint 110 which protrudes below from the fire prevention division 102. FIG.

  Moreover, the pipe joint 10 does not necessarily need to be formed in a curved tubular shape. For example, as shown in FIG. 11, the pipe joint 10 may have a straight tubular joint body 20, which is piped in the vertical direction so as to pass through the through hole 102 a of the fire prevention section 102, and is a drainage stack. 104 may be connected. Moreover, as shown in FIG. 12, the pipe joint 10 may be piped in the horizontal direction so as to penetrate the through hole 102a of the fire prevention section (wall) 102, and the drainage horizontal pipes 114 may be connected to each other. Furthermore, as shown in FIG. 13, the pipe joint 10 may be a special joint such as a collective joint having a branch pipe portion 76.

  Moreover, in the above-mentioned Example, the outer cover part 52 which is an external expansion control part comprised the outer part of the cleaning-mouth cover 24 which is an accommodating part. That is, the housing portion has the outer expansion regulating portion on the outer surface side, but is not limited to this. The external expansion restricting portion is not necessarily a part of the accommodating portion, and the external expansion restricting portion may be configured by a separate member provided on the outer surface side of the accommodating portion.

  For example, as shown in FIG. 14, as an external expansion regulating portion that regulates the outward expansion of the thermal expansion material 66, a cylindrical covering is provided so as to cover a portion that protrudes downward from the fireproof section 102 of the pipe joint 10. The member 80 can also be provided. Although illustration is omitted, the covering member 80 is fixed to the fireproof compartment 102 or the like using a support fitting or the like. As a material of the covering member 80, a non-combustible material having a predetermined strength such as glass wool, rock wool, mortar and metal is used. In the embodiment shown in FIG. 14, the covering member 80 covers the lower part of the pipe joint 10, so that the expansion of the thermal expansion material 66 is restricted in the event of a fire, and the joint body 20 is prevented from falling off. The Therefore, the joint body 20 and the outer lid portion 52 can be made of a synthetic resin such as hard vinyl chloride.

  It should be noted that the specific numerical values such as the dimensions given above are merely examples, and can be appropriately changed according to necessity such as product specifications.

10 ... Pipe fitting (leg joint)
20 ... Fitting body 22 ... Cleaning port (opening)
24 ... Cleaning palate (container)
50 ... Inner lid portion 52 ... Outer lid portion (outer expansion regulating portion)
66 ... Thermal expansion material 80 ... Cover member (outside expansion regulating part)
DESCRIPTION OF SYMBOLS 100 ... Drain piping 102 ... Fire prevention compartment 104 ... Drainage stand pipe 106 ... Drainage horizontal main pipe (drainage horizontal pipe)

Claims (4)

A pipe joint used for drainage piping that penetrates a fire prevention section of a building,
Fitting body,
An opening formed in the side wall of the joint body and penetrating the side wall in the thickness direction;
A housing part that is provided in the opening and in which a thermal expansion material is housed; and an external expansion regulating part that is provided on an outer surface side of the housing part and regulates the outward expansion of the thermal expansion material, Pipe fittings.   The pipe joint according to claim 1, wherein the housing portion is configured by a lid body that is detachably attached to the opening.   The pipe joint according to claim 2, wherein the joint body has a cleaning port, and the cleaning port is used as the opening. It is used for drainage piping that penetrates the fire prevention section of the building, and is a leg joint that connects the drainage standpipe and drainage horizontal pipe,
A joint body having a cleaning port,
A cleaning mouth lid detachably attached to the cleaning mouth;
A leg joint, comprising: a thermal expansion material housed inside the cleaning port lid; and an external expansion regulating unit that is provided on an outer surface side of the cleaning port lid and regulates outward expansion of the thermal expansion material.

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