JP2016040446A - Drain piping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent flame and smoke from passing through a pipe conduit by closing the same when fire occurs.SOLUTION: A drain pipe joint is made of a non-fireproof material. For the purpose of being used in a building, the drain pipe joint has: a pipe body 11 which is arranged in a through hole 7 on a floor slab 2; an upper vertical pipe connection section 6a which is extended above the floor slab and connected to a vertical drain pipe 5 where wastewater from an upper floor inflows therethrough; a lower vertical pipe connection section 6b which is extended beneath the floor slab and connected to the vertical drain pipe 5 where the wastewater flows down therethrough; and a horizontal branch pipe connection section 12 which is connected to a horizontal branch drain pipe above the floor slab. For the purpose of being used in the building, the drain pipe joint is provided with a thermally expandable fireproof material 9 at a portion of the pipe body to be embedded in the through hole on the floor slab.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a drainage pipe joint provided through a floor slab of a building.

  Conventionally, as a drainage pipe structure in a building, there is one in which a resin drainage pipe is used as a drainage pipe joint and a resin drainage pipe or the like is connected (for example, see Patent Document 1).

JP-A-2-272118

For example, if the resin drainage pipe joint as described above is installed in the penetration part of the floor slab of a building, and the resin drainage pipe and the resin drainage pipe joint burn in the event of a fire, they will be lower than the floor slab. There is a risk that flames, smoke, gas, etc. of the first floor will flow out to the upper floor through the resin drainage pipe joint and cause fire spread.
The present invention has been made in view of the above circumstances, and is provided with a heat-expandable refractory material, so that the pipe line is closed in the event of a fire and the flow of flame, smoke, etc. can be blocked. The purpose is to provide.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the drainage pipe joint according to the present invention is formed of a non-refractory material, and when constructed in a building, the pipe body disposed in the through hole of the floor slab, protrudes above the floor slab and projects from the upper floor. An upper pipe connecting portion for connecting a drainage vertical pipe for allowing the waste water to flow in, a lower pipe connecting portion for connecting to a drainage vertical pipe projecting below the floor slab and allowing the drainage to flow down to the lower floor, and above the floor slab A horizontal branch pipe connection portion connected to the drainage horizontal branch pipe, between the horizontal branch pipe connection and the lower pipe connection portion, and when positioned on a building, the lower position than the floor slab A swirl vane is formed on the inner surface of the pipe body, and a thermally expandable refractory material is embedded in a portion of the pipe body that will be located in the through hole of the floor slab when constructed in a building. .

  Preferably, the thermally expandable refractory material is buried over the vertical width located in the through hole of the floor slab in the pipe body when applied to a building. More preferably, the thermally expandable refractory material is embedded over the entire circumference of the pipe body.

  According to the present invention, by providing a heat-expandable refractory material, it is possible to close the pipeline in the event of a fire and block the flow of flame, smoke, and the like.

It is a fragmentary sectional view showing the form of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the form of FIG. 1, the drainage pipe structure 1 is connected to a non-fire-resistant resin drainage pipe joint 4 provided in a through-hole 3 that vertically penetrates a floor slab 2 in a building, and the resin drainage pipe joint 4. And a drainage pipe 5 made of resin. Here, “non-fire resistance” means a property that can be deformed, melted or burned by heat caused by a fire in a building, for example, resin.

The resin drainage pipe joint 4 and the drainage standpipe 5 are formed of, for example, vinyl chloride, polyethylene, polybudene, polypropylene or nylon. In addition, you may use what is called a fireproof two-layer pipe for the drainage standpipe 5, for example.
The resin drainage pipe joint 4 is configured in a straight tube shape, and a vertical pipe connection part 6 (upper pipe connection part 6a, lower pipe connection part for connecting a drainage vertical pipe 5 to each of upper and lower ends thereof. 6b) is provided. The drainage pipe joint 4 made of resin is inserted into a through hole 7 formed in the floor slab 2, and an upper portion of the resin drainage pipe joint 4 protrudes upward from the upper surface 2 a of the floor slab 2, and an upper drainage is connected to the upper pipe connecting portion 6 a. A vertical pipe 5 is connected. Further, the lower part of the resin drainage pipe joint 4 protrudes downward from the lower surface 2b of the floor slab 2, and the lower drainage pipe 5 is connected to the lower pipe connection portion 6b.

The midway part of the resin drainage pipe joint 4 is fixed to the through part 3 by filling the through hole 7 with mortar 8 or the like while being inserted into the through hole 7 of the floor slab 2.
A heat-expandable refractory material 9 is provided on the outer peripheral surface of the middle portion of the resin drainage pipe joint 4. This heat-expandable refractory material 9 is, for example, a resin composition containing a resin component containing butyl rubber as a main component, a phosphorus compound, neutralized heat-expandable graphite, a water-containing inorganic substance, and a metal carbonate, or an epoxy resin. , A phosphorus compound, neutralized heat-expandable graphite, and a resin composition containing an inorganic filler. As the thermally expandable refractory material 9, for example, Sekisui Chemical Co., Ltd. trade name “Fibloc” (expanded 5 to 40 times at a reaction temperature of 200 ° C.) is used. In addition, the product name “thermally expandable heat-resistant sealing material IP” manufactured by Inaba Electric Industry Co., Ltd. The name “Permoflex (thermally expandable sheet)” (850 ° C., foamed after 30 minutes of heating and expands 4 times or more), and the product name “Heat Mel” (Furukawa Techno Material Co., Ltd.) (expansion start temperature 120 ° C., A remarkable expansion temperature of 260 ° C., which expands 4 to 8 times) can be used as the thermal expansion refractory material 9. In addition, the heat-expandable refractory material 9 is not limited to the above, and other various materials can be used.

As described above, the heat-expandable refractory material 9 can use a wide variety of materials having different reaction temperatures and expansion coefficients. Therefore, various conditions such as the reaction temperature and the pipe diameter required according to the construction place in the building are set. You can select and use the most suitable one.
This thermally expandable refractory material 9 is formed in a sheet shape, and is wound around the outer peripheral surface of the midway part of the resin drainage pipe joint 4.

In this embodiment, the heat-expandable refractory material 9 is wound around all the portions where the resin drainage pipe joint 4 is embedded in the through-hole 3, so that the vertical width of the heat-expandable refractory material 9 is the slab thickness. It is almost the same.
As shown in FIG. 1, the thermally expandable refractory material 9 is interposed between the outer peripheral surface of the resin drainage pipe joint 4 and the mortar 8 filled in the through hole 7 of the floor slab 2. Sometimes when the resin drainage pipe joint 4 or the drainage vertical pipe 5 burns, the heat expands inward in the radial direction of the resin drainage pipe joint 4, and the resin drainage pipe joint 4 is crushed from the outside to drain the pipe. Is supposed to block. As a result, the drainage pipe structure 1 can block the pipeline so that flames, smoke and the like do not circulate in the event of a fire.

In the other form of FIG. 2, the position or width of the thermally expandable refractory material 9 provided on the outer peripheral surface of the resin drainage pipe joint 4 is different from that described above.
In the drainage pipe structure described above, the heat-expandable refractory material 9 is provided on the resin drainage pipe joint 4 with substantially the same width as the slab thickness, but in this embodiment, it is provided on the outer peripheral surface of the resin drainage pipe joint 4. The obtained heat-expandable refractory material 9 has a vertical width smaller than the slab thickness. And this thermally expansible refractory material 9 is provided in the lower part of the resin drainage piping joint 4 so that it may be located under the penetration part 3 of the floor slab 2, ie, near the lower surface 2b of the floor slab 2. .

Thus, by disposing the thermally expandable refractory material 9 below the through portion 3 of the floor slab 2, the resin drainage pipe joint 4 and the lower drainage pipe 5 are melted or burned by a downstairs fire. When this occurs, the heat-expandable refractory material 9 rapidly reacts to the heat and expands, so that the pipe line of the resin drainage pipe joint 4 can be closed.
Other configurations and materials of the drainage piping structure 1 are the same as those of the above-described drainage piping structure, and common portions are denoted by common reference numerals and description thereof is omitted (hereinafter the same in other embodiments).

In the form of another drainage pipe structure shown in FIG. 3, a drainage collecting pipe is used as the resin drainage pipe joint 4, and this point is different from the two forms described above.
The resin drainage pipe joint 4 (drainage collecting pipe) includes a pipe body 11, and a vertical pipe to which a drainage pipe 5 (standing main pipe in the illustrated example) is connected to the upper and lower ends of the pipe body 11. Connection portions 6 (upper pipe connection portions 6a and lower pipe connection portions 6b) are formed. Further, a horizontal branch pipe connection portion 13 to which the drainage horizontal branch pipe 12 is connected is formed in the middle portion of the pipe main body 11.

In the drainage pipe structure 1 according to this embodiment, a drainage pipe 5 (drainage pipe) made of resin or the like is connected to each of the vertical pipe connection portions 6 a and 6 b of the resin drainage pipe joint 4, and a resin is connected to the side branch pipe connection portion 13. It is configured by connecting a drainage horizontal branch pipe 12 (drainage pipe) such as a product.
The resin drainage pipe joint 4 is fixed to the penetrating part 3 of the floor slab 2 in the middle part of the resin drainage pipe joint 4 in the same manner as described first, and the upright pipe connecting part 6a and the side branch pipe connecting part 13 are connected to the floor. The slab 2 is disposed so as to protrude upward (or exposed) from the upper surface 2a of the slab 2. On the other hand, the lower part of the resin drainage pipe joint 4 protrudes downward from the lower surface 2 b of the floor slab 2.

A swirl vane 14 is provided on the inner surface of the middle part of the tube body 11 to turn the drainage flowing through the drainage conduit into a swirling flow along the inner surface of the conduit. The swirl vane 14 is formed at a position lower than the horizontal branch pipe connecting portion 13.
A heat-expandable refractory material 9 similar to that of the drain piping structure in FIG. 1 is provided on the outer peripheral surface of the middle part of the pipe body 11 between the side branch pipe connecting part 13 and the swirl vane 14. An intermediate portion between the side branch pipe connecting portion 13 and the swirl vane 14 is cylindrical, and the shape is simpler than that of the portion where the side branch pipe connecting portion 13 and the swirl vane 14 are provided.

  Therefore, the strength of the intermediate portion is relatively low. By providing the heat-expandable refractory material 9 at the intermediate portion, the heat-expandable refractory material 9 expands in the event of a fire and closes the pipeline. In this case, the intermediate portion can be easily crushed, and the drainage pipe line can be reliably and quickly closed without obstructing the side branch pipe connecting portion 13 and the swirl vane 14.

In the form of FIG. 4, a drainage collecting pipe is used for the resin drainage pipe joint 4 as in the form shown in FIG. 3, but a thermally expandable refractory material 9 is embedded in the wall of the drainage collecting pipe. The point differs from the form in FIG.
In this form, the heat-expandable refractory material 9 is formed in a cylindrical shape and is buried over the entire circumference of the resin drainage pipe joint 4. Moreover, this thermally expansible refractory material 9 is embed | buried corresponding to the penetration part 3 of the floor slab 2, and the vertical width of this expansible refractory material 9 is substantially the same as the slab thickness.

Thus, by burying the thermally expandable refractory material 9 in the wall portion of the resin drainage pipe joint 4, the thermally expandable refractory material 9 expands due to the heat generated by the resin drainage pipe joint 4 during a fire, The pipe body 11 can be closed while being crushed and deformed inward.
In addition, the vertical width of the thermally expandable refractory material 9 may be made smaller than the width in the longitudinal direction of the resin drainage pipe joint 4, and may be partially embedded in the resin drainage pipe joint 4, In this case, a plurality of thermally expandable refractory materials 9 can be embedded in the resin drainage pipe joint 4.

Although the heat-expandable refractory material 9 can be embedded in an arbitrary position of the pipe body 11, when the swirl vane 14 is formed in the pipe body 11, the pipe between the swirl vane 14 and the side branch pipe connecting portion 13 is used. It is desirable to embed in the middle part of the main body. Further, the heat-expandable refractory material 9 may be provided so as to be exposed on the inner surface side of the resin drainage pipe joint 4.
In the form shown in FIG. 5, the lower part of the resin drainage pipe joint 4 (drainage collecting pipe) provided in the penetration part 3 of the floor slab 2 protrudes downward from the lower surface 2 b of the floor slab 2, so The material 9 is provided on the outer peripheral surface of the lower part of the resin drainage pipe joint 4 via a fireproof holding member 16, and this point is different from other forms.

Here, “fire resistance” means that it does not burn or melt even if it is exposed to a predetermined condition for a predetermined time (for example, at 210 ° C. for 2 hours) in a fire site or the like. The material is applicable.
The holding member 16 is formed in an annular shape (ring shape) having a U-shaped cross section, and an annular thermally expandable refractory material 9 is provided on the inner surface side thereof.

As shown in FIG. 5, the holding member is fixed in close contact with the lower surface 2 b of the floor slab 2, and is provided close to the through portion 3 of the floor slab 2. Therefore, the heat-expandable refractory material 9 expands in the vicinity of the lower surface 2b of the floor slab 2 at the time of a fire, and can block the pipe line of the resin drainage pipe joint 4.
In addition, the outer periphery of the thermally expandable refractory material 9 is covered with the holding member 16, and therefore, when expanded due to heat at the time of a fire, it does not expand outward in the radial direction of the tube body 11, It expands only inward in the radial direction. Thereby, the heat-expandable refractory material 9 can close the drain pipe quickly and reliably.

In the form shown in FIG. 6, the structure of the fire-resistant holding member 16 is different from the form shown in FIG.
That is, the holding member 16 in this embodiment includes a fixing portion 17 that fixes the holding member 16 to the floor slab 2 and a holding portion 18 that holds the thermally expandable refractory material 9.
The fixing portion 17 is constituted by an anchor bolt, and one end thereof is fixed to the lower surface 2a side of the floor slab 2.

The holding part 18 is constituted by a pair of long metal plate members, and a curved part 19 on an arc is formed in the middle part of the pair of plate members. A sheet-like thermally expandable refractory material 9 is fixed to the inner surface of the curved portion 19 along the curved shape of the curved portion 19.
The pair of plate members are attached to the lower part of the resin drainage pipe joint 4 in a state of facing each other. At this time, the lower portion of the resin drainage pipe joint 4 is sandwiched between the curved portions 19 of the pair of plate members. In this state, the thermally expandable refractory material 9 is located between the plate material and the outer peripheral surface of the lower part of the resin drainage pipe joint 4.

An end portion of the plate member is fixed to an anchor bolt as a fixing portion 17 via a nut 20. The holding part 18 can change the vertical position by changing the position of the nut 20 screwed into the anchor bolt. Moreover, the holding part 18 is arrange | positioned so that it may contact or closely_contact | adhere to the lower surface 2b of the floor slab 2 as much as possible.
The thermally expandable refractory material 9 according to this embodiment can expand near the lower surface 2b of the floor slab 2 in the event of a fire and close the pipe line of the resin drainage pipe joint 4 as in the embodiment shown in FIG. It is like that.

The drainage pipe structure is not limited to the above-described form, and various modifications and changes can be made as follows.
The heat-expandable refractory material 9 may be provided at the junction between the vertical pipe connecting portions 6 a and 6 b of the resin drainage pipe joint 4 and the drainage vertical pipe 5. In this case, it is good also as a structure which comprises the thermally expansible fireproof material 9 with the member which has a water stop, this is provided between the connection part of the vertical pipe connection part 6 and the drainage vertical pipe 5, and is shared as packing.

  The heat-expandable refractory material 9 may be provided on the outer peripheral surface and inner peripheral surface of the horizontal branch pipe connecting portion 13 of the resin drainage pipe joint 4 or embedded in the horizontal branch pipe connecting portion 13. A plurality of side branch pipe connecting portions 13 can be formed in the resin drainage pipe joint 4.

  INDUSTRIAL APPLICATION This invention can be utilized for the drainage pipe joint which penetrates the floor slab of a building.

2 Floor slab 4 Resin drainage pipe joint (drainage pipe joint)
5 Drainage pipe 6 Vertical pipe connection part 9 Thermal expansion refractory material 11 Pipe body 12 Drainage horizontal branch pipe 13 Horizontal branch pipe connection part

The present invention relates to a drainage pipe structure including a drainage pipe joint provided through a floor slab of a building.

  Conventionally, as a drainage pipe structure in a building, there is one in which a resin drainage pipe is used as a drainage pipe joint and a resin drainage pipe or the like is connected (for example, see Patent Document 1).

JP-A-2-272118

For example, if the resin drainage pipe joint as described above is installed in the penetration part of the floor slab of a building, and the resin drainage pipe and the resin drainage pipe joint burn in the event of a fire, they will be lower than the floor slab. There is a risk that flames, smoke, gas, etc. of the first floor will flow out to the upper floor through the resin drainage pipe joint and cause fire spread.
The present invention has been made in view of the above circumstances, and is provided with a heat-expandable refractory material, so that the pipe line is closed in the event of a fire and the flow of flame, smoke, etc. can be blocked. It aims at providing the drainage piping structure containing .

In order to solve the above problems, the present invention has taken the following technical means.
That is, the drainage pipe structure according to the present invention is a non-refractory resin drainage pipe joint, a drainage stand pipe, and a thermal expansibility that expands at a predetermined temperature or more provided in a penetrating portion that penetrates a floor slab in a building. The drainage pipe structure is made of a refractory material, and the resin drainage pipe joint is connected to the pipe main body, the pipe main body and the lower part of the floor slab. A vertical pipe connecting portion, and a horizontal branch pipe connecting portion located across a cylindrical intermediate portion provided in the pipe main body for connecting a horizontal branch pipe arranged on the upper floor of the floor slab, The lower part of the resin drainage pipe joint protrudes downward from the lower surface of the floor slab, and the thermally expandable refractory material is disposed in the lower part.

(1) The thermally expandable refractory material is wound around an outer peripheral surface of the lower pipe connecting portion, and the outer periphery thereof is covered and held by a refractory holding member. Is disposed on the outer peripheral surface of the lower pipe connection portion so as not to overlap the drainage vertical pipe, only the lower pipe connection portion protrudes downward from the lower surface of the floor slab, and the holding member is The floor slab is fixed in close contact with the lower surface of the floor slab without anchoring. More preferably, (2) the thermally expandable refractory material is disposed on an outer peripheral surface of the lower pipe connecting portion at a position not overlapping the drain vertical pipe, and the lower pipe connecting portion and the pipe main body The lower part protrudes downward from the lower surface of the floor slab, and the holding member has a mechanism capable of changing the vertical position, and is anchored to the lower surface of the floor slab, and by adjusting the mechanism, The holding member is connected to the lower pipe so as to be close to the lower surface of the floor slab while being spaced apart from the lower surface of the slab by the height of the lower portion of the pipe body protruding from the lower surface of the floor slab. It is arrange | positioned at the outer peripheral surface of a part. More preferably, (3) the heat-expandable refractory material is located between a joint portion between the lower pipe connecting portion of the resin drainage pipe joint and the drainage pipe. More preferably, in addition to (3), (4) the heat-expandable refractory material is configured with a water-proof member and is used as a packing. More preferably, (5) the resin drainage pipe joint further has an upright pipe connecting portion in which the drainage vertical pipe is continuously connected to the pipe body in the upper direction, and the thermally expandable refractory material is The drainage pipe joint of the resin is provided at a joint portion between the lower pipe connecting portion and the drainage vertical pipe, and is also provided at a joint portion between the upper pipe connecting portion and the drainage vertical pipe. It is characterized by that. More preferably, in addition to (5), (6) the thermally expandable refractory material is further embedded in the outer peripheral surface, inner peripheral surface, or inside of the horizontal pipe connecting portion of the resin drainage pipe joint. It is characterized by being.

  According to the present invention, by providing a heat-expandable refractory material, it is possible to close the pipeline in the event of a fire and block the flow of flame, smoke, and the like.

It is a fragmentary sectional view showing the form of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure. It is a fragmentary sectional view showing other forms of drainage piping structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the form of FIG. 1, the drainage pipe structure 1 is connected to a non-fire-resistant resin drainage pipe joint 4 provided in a through-hole 3 that vertically penetrates a floor slab 2 in a building, and the resin drainage pipe joint 4. And a drainage pipe 5 made of resin. Here, “non-fire resistance” means a property that can be deformed, melted or burned by heat caused by a fire in a building, for example, resin.

The resin drainage pipe joint 4 and the drainage standpipe 5 are formed of, for example, vinyl chloride, polyethylene, polybudene, polypropylene or nylon. In addition, you may use what is called a fireproof two-layer pipe for the drainage standpipe 5, for example.
The resin drainage pipe joint 4 is configured in a straight tube shape, and a vertical pipe connection part 6 (upper pipe connection part 6a, lower pipe connection part for connecting a drainage vertical pipe 5 to each of upper and lower ends thereof. 6b) is provided. The drainage pipe joint 4 made of resin is inserted into a through hole 7 formed in the floor slab 2, and an upper portion of the resin drainage pipe joint 4 protrudes upward from the upper surface 2 a of the floor slab 2, and an upper drainage is connected to the upper pipe connecting portion 6 a. A vertical pipe 5 is connected. Further, the lower part of the resin drainage pipe joint 4 protrudes downward from the lower surface 2b of the floor slab 2, and the lower drainage pipe 5 is connected to the lower pipe connection portion 6b.

The midway part of the resin drainage pipe joint 4 is fixed to the through part 3 by filling the through hole 7 with mortar 8 or the like while being inserted into the through hole 7 of the floor slab 2.
A heat-expandable refractory material 9 is provided on the outer peripheral surface of the middle portion of the resin drainage pipe joint 4. This heat-expandable refractory material 9 is, for example, a resin composition containing a resin component containing butyl rubber as a main component, a phosphorus compound, neutralized heat-expandable graphite, a water-containing inorganic substance, and a metal carbonate, or an epoxy resin. , A phosphorus compound, neutralized heat-expandable graphite, and a resin composition containing an inorganic filler. As the thermally expandable refractory material 9, for example, Sekisui Chemical Co., Ltd. trade name “Fibloc” (expanded 5 to 40 times at a reaction temperature of 200 ° C.) is used. In addition, the product name “thermally expandable heat-resistant sealing material IP” manufactured by Inaba Electric Industry Co., Ltd. The name “Permoflex (thermally expandable sheet)” (850 ° C., foamed after 30 minutes of heating and expands 4 times or more), and the product name “Heat Mel” (Furukawa Techno Material Co., Ltd.) (expansion start temperature 120 ° C., A remarkable expansion temperature of 260 ° C., which expands 4 to 8 times) can be used as the thermal expansion refractory material 9. In addition, the heat-expandable refractory material 9 is not limited to the above, and other various materials can be used.

As described above, the heat-expandable refractory material 9 can use a wide variety of materials having different reaction temperatures and expansion coefficients. Therefore, various conditions such as the reaction temperature and the pipe diameter required according to the construction place in the building are set. You can select and use the most suitable one.
This thermally expandable refractory material 9 is formed in a sheet shape, and is wound around the outer peripheral surface of the midway part of the resin drainage pipe joint 4.

In this embodiment, the heat-expandable refractory material 9 is wound around all the portions where the resin drainage pipe joint 4 is embedded in the through-hole 3, so that the vertical width of the heat-expandable refractory material 9 is the slab thickness. It is almost the same.
As shown in FIG. 1, the thermally expandable refractory material 9 is interposed between the outer peripheral surface of the resin drainage pipe joint 4 and the mortar 8 filled in the through hole 7 of the floor slab 2. Sometimes when the resin drainage pipe joint 4 or the drainage vertical pipe 5 burns, the heat expands inward in the radial direction of the resin drainage pipe joint 4, and the resin drainage pipe joint 4 is crushed from the outside to drain the pipe. Is supposed to block. As a result, the drainage pipe structure 1 can block the pipeline so that flames, smoke and the like do not circulate in the event of a fire.

In the other form of FIG. 2, the position or width of the thermally expandable refractory material 9 provided on the outer peripheral surface of the resin drainage pipe joint 4 is different from that described above.
In the drainage pipe structure described above, the heat-expandable refractory material 9 is provided on the resin drainage pipe joint 4 with substantially the same width as the slab thickness, but in this embodiment, it is provided on the outer peripheral surface of the resin drainage pipe joint 4. The obtained heat-expandable refractory material 9 has a vertical width smaller than the slab thickness. And this thermally expansible refractory material 9 is provided in the lower part of the resin drainage piping joint 4 so that it may be located under the penetration part 3 of the floor slab 2, ie, near the lower surface 2b of the floor slab 2. .

Thus, by disposing the thermally expandable refractory material 9 below the through portion 3 of the floor slab 2, the resin drainage pipe joint 4 and the lower drainage pipe 5 are melted or burned by a downstairs fire. When this occurs, the heat-expandable refractory material 9 rapidly reacts to the heat and expands, so that the pipe line of the resin drainage pipe joint 4 can be closed.
Other configurations and materials of the drainage piping structure 1 are the same as those of the above-described drainage piping structure, and common portions are denoted by common reference numerals and description thereof is omitted (hereinafter the same in other embodiments).

In the form of another drainage pipe structure shown in FIG. 3, a drainage collecting pipe is used as the resin drainage pipe joint 4, and this point is different from the two forms described above.
The resin drainage pipe joint 4 (drainage collecting pipe) includes a pipe body 11, and a vertical pipe to which a drainage pipe 5 (standing main pipe in the illustrated example) is connected to the upper and lower ends of the pipe body 11. Connection portions 6 (upper pipe connection portions 6a and lower pipe connection portions 6b) are formed. Further, a horizontal branch pipe connection portion 13 to which the drainage horizontal branch pipe 12 is connected is formed in the middle portion of the pipe main body 11.

In the drainage pipe structure 1 according to this embodiment, a drainage pipe 5 (drainage pipe) made of resin or the like is connected to each of the vertical pipe connection portions 6 a and 6 b of the resin drainage pipe joint 4, and a resin is connected to the side branch pipe connection portion 13. It is configured by connecting a drainage horizontal branch pipe 12 (drainage pipe) such as a product.
The resin drainage pipe joint 4 is fixed to the penetrating part 3 of the floor slab 2 in the middle part of the resin drainage pipe joint 4 in the same manner as described first, and the upright pipe connecting part 6a and the side branch pipe connecting part 13 are connected to the floor. The slab 2 is disposed so as to protrude upward (or exposed) from the upper surface 2a of the slab 2. On the other hand, the lower part of the resin drainage pipe joint 4 protrudes downward from the lower surface 2 b of the floor slab 2.

A swirl vane 14 is provided on the inner surface of the middle part of the tube body 11 to turn the drainage flowing through the drainage conduit into a swirling flow along the inner surface of the conduit. The swirl vane 14 is formed at a position lower than the horizontal branch pipe connecting portion 13.
A heat-expandable refractory material 9 similar to that of the drain piping structure in FIG. 1 is provided on the outer peripheral surface of the middle part of the pipe body 11 between the side branch pipe connecting part 13 and the swirl vane 14. An intermediate portion between the side branch pipe connecting portion 13 and the swirl vane 14 is cylindrical, and the shape is simpler than that of the portion where the side branch pipe connecting portion 13 and the swirl vane 14 are provided.

  Therefore, the strength of the intermediate portion is relatively low. By providing the heat-expandable refractory material 9 at the intermediate portion, the heat-expandable refractory material 9 expands in the event of a fire and closes the pipeline. In this case, the intermediate portion can be easily crushed, and the drainage pipe line can be reliably and quickly closed without obstructing the side branch pipe connecting portion 13 and the swirl vane 14.

In the form of FIG. 4, a drainage collecting pipe is used for the resin drainage pipe joint 4 as in the form shown in FIG. 3, but a thermally expandable refractory material 9 is embedded in the wall of the drainage collecting pipe. The point differs from the form in FIG.
In this form, the heat-expandable refractory material 9 is formed in a cylindrical shape and is buried over the entire circumference of the resin drainage pipe joint 4. Moreover, this thermally expansible refractory material 9 is embed | buried corresponding to the penetration part 3 of the floor slab 2, and the vertical width of this expansible refractory material 9 is substantially the same as the slab thickness.

Thus, by burying the thermally expandable refractory material 9 in the wall portion of the resin drainage pipe joint 4, the thermally expandable refractory material 9 expands due to the heat generated by the resin drainage pipe joint 4 during a fire, The pipe body 11 can be closed while being crushed and deformed inward.
In addition, the vertical width of the thermally expandable refractory material 9 may be made smaller than the width in the longitudinal direction of the resin drainage pipe joint 4, and may be partially embedded in the resin drainage pipe joint 4, In this case, a plurality of thermally expandable refractory materials 9 can be embedded in the resin drainage pipe joint 4.

Although the heat-expandable refractory material 9 can be embedded in an arbitrary position of the pipe body 11, when the swirl vane 14 is formed in the pipe body 11, the pipe between the swirl vane 14 and the side branch pipe connecting portion 13 is used. It is desirable to embed in the middle part of the main body. Further, the heat-expandable refractory material 9 may be provided so as to be exposed on the inner surface side of the resin drainage pipe joint 4.
In the form shown in FIG. 5, the lower part of the resin drainage pipe joint 4 (drainage collecting pipe) provided in the penetration part 3 of the floor slab 2 protrudes downward from the lower surface 2 b of the floor slab 2, so The material 9 is provided on the outer peripheral surface of the lower part of the resin drainage pipe joint 4 via a fireproof holding member 16, and this point is different from other forms.

Here, “fire resistance” means that it does not burn or melt even if it is exposed to a predetermined condition for a predetermined time (for example, at 210 ° C. for 2 hours) in a fire site or the like. The material is applicable.
The holding member 16 is formed in an annular shape (ring shape) having a U-shaped cross section, and an annular thermally expandable refractory material 9 is provided on the inner surface side thereof.

As shown in FIG. 5, the holding member is fixed in close contact with the lower surface 2 b of the floor slab 2, and is provided close to the through portion 3 of the floor slab 2. Therefore, the heat-expandable refractory material 9 expands in the vicinity of the lower surface 2b of the floor slab 2 at the time of a fire, and can block the pipe line of the resin drainage pipe joint 4.
In addition, the outer periphery of the thermally expandable refractory material 9 is covered with the holding member 16, and therefore, when expanded due to heat at the time of a fire, it does not expand outward in the radial direction of the tube body 11, It expands only inward in the radial direction. Thereby, the heat-expandable refractory material 9 can close the drain pipe quickly and reliably.

In the form shown in FIG. 6, the structure of the fire-resistant holding member 16 is different from the form shown in FIG.
That is, the holding member 16 in this embodiment includes a fixing portion 17 that fixes the holding member 16 to the floor slab 2 and a holding portion 18 that holds the thermally expandable refractory material 9.
The fixing portion 17 is constituted by an anchor bolt, and one end thereof is fixed to the lower surface 2a side of the floor slab 2.

The holding part 18 is constituted by a pair of long metal plate members, and a curved part 19 on an arc is formed in the middle part of the pair of plate members. A sheet-like thermally expandable refractory material 9 is fixed to the inner surface of the curved portion 19 along the curved shape of the curved portion 19.
The pair of plate members are attached to the lower part of the resin drainage pipe joint 4 in a state of facing each other. At this time, the lower portion of the resin drainage pipe joint 4 is sandwiched between the curved portions 19 of the pair of plate members. In this state, the thermally expandable refractory material 9 is located between the plate material and the outer peripheral surface of the lower part of the resin drainage pipe joint 4.

An end portion of the plate member is fixed to an anchor bolt as a fixing portion 17 via a nut 20. The holding part 18 can change the vertical position by changing the position of the nut 20 screwed into the anchor bolt. Moreover, the holding part 18 is arrange | positioned so that it may contact or closely_contact | adhere to the lower surface 2b of the floor slab 2 as much as possible.
The thermally expandable refractory material 9 according to this embodiment can expand near the lower surface 2b of the floor slab 2 in the event of a fire and close the pipe line of the resin drainage pipe joint 4 as in the embodiment shown in FIG. It is like that.

The drainage pipe structure is not limited to the above-described form, and various modifications and changes can be made as follows.
The heat-expandable refractory material 9 may be provided at the junction between the vertical pipe connecting portions 6 a and 6 b of the resin drainage pipe joint 4 and the drainage vertical pipe 5. In this case, it is good also as a structure which comprises the thermally expansible fireproof material 9 with the member which has a water stop, this is provided between the connection part of the vertical pipe connection part 6 and the drainage vertical pipe 5, and is shared as packing.

  The heat-expandable refractory material 9 may be provided on the outer peripheral surface and inner peripheral surface of the horizontal branch pipe connecting portion 13 of the resin drainage pipe joint 4 or embedded in the horizontal branch pipe connecting portion 13. A plurality of side branch pipe connecting portions 13 can be formed in the resin drainage pipe joint 4.

INDUSTRIAL APPLICATION This invention can be utilized for the drainage piping structure containing the drainage piping joint which penetrates the floor slab of a building.

2 Floor slab 4 Resin drainage pipe joint (drainage pipe joint)
5 Drainage pipe 6 Vertical pipe connection part 9 Thermal expansion refractory material 11 Pipe body 12 Drainage horizontal branch pipe 13 Horizontal branch pipe connection part

Claims (3)

Formed of non-refractory material,
A pipe body arranged in a through-hole of a floor slab when installed in a building, an upright pipe connecting portion for connecting a drainage vertical pipe that protrudes above the floor slab and allows drainage from an upper floor to flow, and the floor A lower pipe connecting portion that protrudes below the slab and connects to a drainage vertical pipe that causes drainage to flow down to the lower floor, and a side branch pipe connecting portion that is connected to the drainage horizontal branch pipe above the floor slab,
A swirl vane is formed between the side branch pipe connection and the vertical pipe connection part, and the inner surface of the pipe body that is positioned below the floor slab when constructed in a building,
A drainage pipe joint, wherein a thermally expandable refractory material is embedded in a portion of the pipe body that will be located in a through hole of the floor slab when constructed in a building. The drainage pipe joint according to claim 1, wherein the thermally expandable refractory material is buried over a vertical width located in a through-hole of the floor slab in the pipe body when applied to a building. The drainage pipe joint according to claim 1 or 2, wherein the thermally expandable refractory material is embedded over the entire circumference of the pipe body.

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