WO2003106773A1

WO2003106773A1 - Special joint for drain collecting pipe, draining system, and draining method

Info

Publication number: WO2003106773A1
Application number: PCT/JP2003/007343
Authority: WO
Inventors: 塚越　信行
Original assignee: 株式会社ブリヂストン; 大村勝行
Priority date: 2002-06-18
Filing date: 2003-06-10
Publication date: 2003-12-24
Also published as: JP2004019297A; AU2003242194A1; AU2003242194A8

Abstract

A special joint for a drain collecting pipe formed of normal pipes, allowing quality control and installation to be easily performed, and providing a long-term reliability, a draining system, and a draining method, the draining system wherein when drains from equipment in kitchen and sanitary space on floors are merged through a rise drain pipe vertically passing through the floors of a multi-story building at merging parts provided in the rise drain pipe on the floors, the merging parts are formed on the undersides of the levels of floor slabs to accelerate the flows of the drains from the equipment in the kitchen and sanitary space by height differences between the levels of the floor slabs and the merging parts and forming cranks in the rise drain pipe on the upper sides of the merging parts to collide the flow of the drains from the upper sides of the cranks against the inside walls of the cranks so as to decelerate the flows of the drains.

Description

Description Special fitting for drainage pipe, drainage system and drainage method

TECHNICAL FIELD The present invention relates to a drainage special joint for drainage applied to a multi-story building, a drainage system, and a drainage method.

BACKGROUND ART Conventionally, drainage systems for multi-story buildings such as condominiums combine drainage for each floor with a single drainage riser that traverses each floor, drop it to the ground or the ground floor, and discharge it to the outside of the multi-story building. We take the method to do. Regarding the drainage merging method for each floor, more specifically, the instrument drainage pipes horizontally arranged on the underfloor floor for each floor or for each dwelling unit on each floor are connected at right angles to the drainage riser via drainage horizontal branch pipes The drainage collected from plumbing fixtures such as kitchens and wash basins joined the drainage stack via the instrument drainage pipe and drain horizontal branch pipe.

However, in this merging method, the trap of the plumbing fixture and the problem of abnormal noise occurred due to the following mechanism.

(1) The drainage from the floor merges with the drainage accelerated by free fall from the upper floor at a low speed close to zero.

(2) Due to the large speed difference between the drainage from the upper floor and the drainage from that floor, the drainage is prevented from dropping at the junction and a drainage lump is formed.

(3) An unusually high water filling rate occurs partially in the pipe at the junction.

(4) Since the drainage in that part falls as a lump or falls, the pressure fluctuations increase below the junction of the drainage riser, and the minimum negative pressure in the system decreases. grow up.

(5) The pressure fluctuation affects the instrument drainpipe.

As one of the methods to solve the congestion phenomenon at the confluence, which is the cause of the above problem, special drainage joints represented by the Sovent system have been developed.

This is to reduce the congestion phenomenon and reduce the cause of negative pressure even if waste water is formed by increasing the horizontal cross-sectional area of the confluence area and taking up space.

Also, in Japanese Patent Application Laid-Open No. 2001-1773866, by providing a blade for receiving drainage at a junction, a swirling flow of drainage is formed in the pipe, and the pipe is forcibly moved to the center of the pipe. A method is disclosed in which an air layer is formed to prevent a full state.

However, all of the above methods have the effect of reducing the congestion phenomenon of drainage, but have the following problems.

(1) Special drainage fittings represented by the Sovent system

This special joint becomes large because it takes up the space at the junction, and it becomes heavy because it is made of solid materials. Therefore, handling during construction was inconvenient. In addition, in order to penetrate and hold the concrete slab under the floor (hereinafter referred to as floor slab), it was necessary to reinforce the holding part in some cases.

(2) The invention disclosed in Japanese Patent Application Laid-Open No. 2000-017-1736

Processing to provide swirling vanes in the piping is required, and quality control takes more time than in ordinary piping. Also, it was difficult to predict the change in drainage efficiency due to corrosion and foreign matter adhesion during long-term use because the condition inside the piping could not be observed.

The present invention has been made in view of the above-described problems in the prior art, and is composed of ordinary piping. It is easy to perform quality control and construction, and has long-term reliability. The purpose is to provide a drainage method.

DISCLOSURE OF THE INVENTION The drainage pipe special joint of the present application provided to solve the above problems A main pipe having an inflow end from the drainage stack and an outflow end to the drainage stack, a drainage inflow end and a drainage outflow end connected to the main pipe. A crank is formed in the main pipe, and an opening is formed in an outer peripheral portion between a central portion of the crank and an outflow end of the main pipe, and an outflow end of the merge pipe is provided. Is connected to the main pipe through its opening, and connected to the drainage riser, the connection of the outflow end of the merge pipe to the main pipe is the inflow end of the merge pipe. It is characterized in that it is arranged so as to be more deviated in the direction of the outflow side end of the main pipe portion than the position.

The main pipe part of the drainage special pipe joint having the above configuration is connected to the drainage riser, and the merged pipe part is connected to the appliance drainage pipe from the plumbing device, so that it flows from the drainage riser above this joint The drainage is decelerated by colliding with the inner wall of the crank formed above the connection. Drainage from the plumbing equipment is accelerated by the head before reaching the connection. Such acceleration and deceleration reduce the relative velocity difference in the flow velocity near the junction of the main pipe where the two wastewaters join, making local drainage less likely to occur. Therefore, the use of such a joint makes it difficult for negative pressure to be generated below the confluence in the drainage riser, so that problems such as trap opening and abnormal noise do not occur.

Also, in the drainage special joint for drainage of the present application, the center of the inner diameter of the connection portion and the center of the opening of the outflow side end of the main pipe portion are arranged substantially on the same perpendicular.

By further providing such a configuration, drainage flowing into the main pipe from the junction through the connection may cause a situation where the drainage collides with the inner wall of the main pipe from the connection to the outflow end and is decelerated. Unfortunately. For this reason, the possibility of local wastewater clumping near the connection of the main pipe is further reduced.

In the special joint for drainage pipes of the present application, the merging pipe section has a vertical pipe section near the connection section, and the center of the opening of the outflow end of the main pipe section is on the center axis of the inner diameter of the vertical pipe section. It is practically located.

By further providing such a configuration, it is difficult for the drainage flowing into the main pipe portion from the junction pipe portion through the connection portion to collide with the inner wall near the connection portion of the junction pipe portion and to be decelerated. For this reason, the possibility of the occurrence of local drainage lump near the connection of the main pipe is further reduced.

Also, in the special joint for drainage pipe of the present application, the outflow side and the inflow side of the main pipe portion are used. The center of the opening at the end is substantially co-linear.

By further providing such a configuration, the drainage riser disposed above the joint and the drainage riser disposed below the joint are arranged such that the central axes of the inner diameters thereof substantially coincide with each other. For this reason, the position of the drainage stack does not change for each floor, and this joint can be easily applied to the junction between the existing drainage stack and the instrument drainage pipe.

Also, in the drainage special joint for drainage of the present application, a second crank is provided between the crank and the outflow-side end of the merging pipe portion, and a connection portion is provided on an outer peripheral portion of the second crank.

By further providing such a configuration, the drainage flowing through the junction tube to the connection portion is further decelerated by colliding with the inner wall of the second crank. For this reason, the possibility of the occurrence of local drainage lump near the connecting portion of the main pipe is further reduced. Further, it is possible to form a substantial offset portion of the drainage riser between the inflow side end and the outflow side end of the main pipe by the two cranks. By arranging the vertical pipe portion of the merging pipe section at this offset portion, the drainage that is accelerated by the merging pipe section and flows into the main pipe section through the connection section is not easily decelerated in the main pipe section, and the main pipe section is not easily decelerated. The joint that realizes that the wastewater flowing from the inflow end of the pipe is decelerated and guided to the vicinity of the connection part of the main pipe is realized with a particularly space-saving structure.

Also, in the drainage special joint for drainage of the present application, the merging pipe portion has a bent portion, and a part of the pipe at the bent portion is closer to the inflow side end of the main pipe portion than to the drainage inflow side end of the merging tube portion. It is arranged so as to be deviated in the part direction.

By further providing such a configuration, the drainage flowing from the plumbing device to the junction pipe portion is once sealed at the bent portion. After that, it is accelerated by the pressure generated by the own weight of the drainage water upstream of the sealed part, flows into the main pipe through the connection part, and accelerated by the siphon phenomenon. For this reason, the possibility of the occurrence of local drainage lump near the connection of the main pipe is further reduced.

Further, in the drainage special joint for drainage of the present application, a plurality of merging pipe portions are connected to the connection portion.

Connecting multiple junctions to the connection is effective from the viewpoint of space saving, but increases the possibility of local drainage blockage near the connection of the main pipe. There is a risk. However, by providing the above configuration, the possibility of occurrence of such a blockage of drainage is particularly low, and a space-saving joint is realized. In addition, in the drainage system of the present application provided to solve the above-mentioned problems, a drainage riser that penetrates each floor in the vertical direction of a multi-story building, and a drainage from a plumbing device on that floor for each floor. And a drainage pipe that guides the drainage to the drainage stack, a crank is formed in the drainage stack, and a junction corresponding to the instrument drainage pipe is formed in the drainage stack, and the junction is located at the center of the crank. Below, and below the level of the floor slab on the floor corresponding to the appliance drain.

In the drainage system having such a configuration, the drainage flowing from the upper drainage stack is decelerated by colliding with the inner wall of a crank formed above the junction. Drainage from plumbing equipment is accelerated by the head before reaching the junction. Such acceleration and deceleration reduce the relative velocity difference between the flow velocities near the junction where the two wastewaters join, making local drainage less likely to occur. Therefore, the use of such a drainage system makes it difficult for negative pressure to be generated below the junction in the drainage riser, and it is unlikely that the trap will open and the problem of abnormal noise will occur.

Also, in the drainage system of the present application, a vertical pipe portion is formed in the vicinity of the junction in the appliance drainage pipe, and the vertical pipe portion has an inner diameter center axis which is the inner diameter center axis of the drainage pipe below the junction portion. Are arranged so as to substantially match

By further providing such a configuration, the drainage from the instrument drainpipe is accelerated by the vertical pipe and flows into the junction. In addition, it is unlikely that the flow of the drained water collides with the inner wall of the pipe in the drainage stack and is decelerated. For this reason, the possibility that local drainage lumps occur near the junction is further reduced.

In the drainage system of the present application, the vertical pipe is formed such that the upper end is at the level of the floor slab and the lower end is the junction.

By further providing such a configuration, the vertical tube portion is formed as long as possible in terms of structure. For this reason, the flow velocity of the drainage near the junction is particularly likely to increase, and the possibility of the occurrence of local drainage lump is further reduced. In addition, in this structure, the instrument drainage pipe placed on the floor slab is substantially horizontal, but the drainage flowing through the vertical pipe is fast, so negative pressure is generated in the horizontal part of the instrument drainage pipe. Drainage in horizontal areas The problem of stagnation is more unlikely.

Further, in the drainage system of the present application, the central axis of the inner diameter of the drainage riser above the crank and the drainage riser below the junction are substantially coincident.

By further providing such a configuration, the arrangement position of the drainage stack does not change for each floor, and the system according to the present invention can be easily applied to the junction of the existing drainage stack and the instrument drainage pipe. Is possible.

In the drainage system of the present application, a second crank is formed below the crank, and the junction is formed at a part of the second crank.

By further providing such a configuration, the drainage flowing through the drainage riser to the junction is further decelerated by colliding with the inner wall of the second crank. For this reason, the flow velocity of the drainage in the vicinity of the junction is further reduced, and the possibility of occurrence of local drainage lump is further reduced. Further, it is possible to form a substantial offset portion of the drainage riser with the two cranks. By arranging the vertical part of the instrument drainage pipe at this offset part, the drainage that is accelerated by this vertical pipe and flows into the junction is not easily decelerated in the drainage riser, and is located above the drainage riser. The drainage system that reduces the speed of the drainage and flows into the junction is realized with a particularly space-saving structure.

Further, in the drainage system of the present application, the appliance drainage pipe is arranged almost horizontally on the floor slab and is connected to the plumbing equipment, and a bend formed between the horizontal portion and the junction. And a part of the pipe at the bent portion is disposed above the horizontal portion.

By further providing such a configuration, the drainage flowing from the plumbing device to the junction is once sealed at the bent portion. After that, it flows into the confluence while being accelerated by the pressure generated by the weight of the drainage water upstream of the sealed part, and is further accelerated by the siphon phenomenon. For this reason, the possibility that local drainage lump occurs near the junction is further reduced.

Further, in the drainage system of the present application, a plurality of appliance drainage pipes are connected to one junction.

Connecting multiple instrument drainage pipes to one junction is effective from the viewpoint of saving space, but local drainage occurs near the one junction to be connected. There is a risk of increasing the likelihood of doing so. However, with the above configuration, the possibility of the occurrence of blockage of the wastewater is particularly low, so that a space-saving drainage system is realized.

Further, the drainage method of the present application provided to solve the above-mentioned problem is as follows. This is a drainage method in which each floor is joined at the junction provided at the floor, where the junction is formed below the level of the floor slab, and the flow of drainage from the water-related equipment flows between the level of the floor slab and the junction. It is characterized by accelerating due to the difference in elevation, forming a crank in the drain riser above the junction, and reducing the flow of drain water from above the crank by the crank.

By employing such a drainage method, the relative velocity difference between the flow velocities near the junction where the two wastewaters join is reduced, and local solidification of the drainage is less likely to occur. Therefore, according to the drainage method, negative pressure is less likely to be generated below the junction in the drainage stack, and problems such as trap opening and abnormal noise are unlikely to occur.

Further, in the drainage method of the present application, the plumbing device and the junction are connected by an instrument drainage pipe, and drainage from the plumbing device is drained near the junction of the instrument drainage pipe below the junction. Acceleration is achieved by a vertical tube formed so that the central axis of the inner diameter substantially coincides with the inner diameter.

By adopting this drainage method, drainage from the instrument drainpipe is accelerated by the vertical pipe and flows into the junction. In addition, it is unlikely that the flow of the drained water collides with the inner wall of the pipe in the drainage stack and is decelerated. For this reason, the possibility that local drainage lumps occur near the junction is further reduced.

Further, in the drainage method of the present application, the vertical pipe portion is formed such that the upper end is the level of the floor slab and the lower end is the junction.

By employing such a drainage method, the vertical pipe portion is formed as long as possible in terms of structure. For this reason, the flow velocity of the drainage near the junction is particularly likely to increase, and the possibility of the occurrence of local drainage lump is further reduced. In addition, in this structure, the instrument drainage pipe placed on the floor slab is substantially horizontal, but the drainage flowing through the vertical pipe is fast, so negative pressure is generated in the horizontal part of the instrument drainage pipe. Drainage in horizontal areas The problem of stagnation is more unlikely.

Further, in the drainage method of the present application, the central axes of the inner diameters of the drainage riser above the crank and the drainage riser below the junction are substantially aligned.

By providing such a configuration, the position of the drainage stack does not change for each floor, and the structure of the junction between the existing drainage stack and the instrument drainage pipe is changed to drainage according to the present invention. Adopting the method is easily realized.

Further, in the drainage method of the present application, the drainage that has passed through the crank is decelerated by a second crank formed below the crank, and is reduced to a junction formed in a part of the second crank. Lead.

By colliding with the inner wall of the second crank, the drainage flowing through the drainage stack to the junction is further decelerated. For this reason, the flow velocity of the drainage near the junction becomes particularly low, and the possibility of occurrence of local drainage lump further decreases. Further, it is possible to form a substantial offset portion of the drainage stack by using two cranks. By arranging the vertical pipe section of the instrument drainage pipe at this offset part, the drainage accelerated by this vertical pipe section and flowing into the junction is difficult to be decelerated in the drainage stack, and from above the drainage stack. A drainage method that allows the drainage to slow down and flow into the junction is realized, especially in a space-saving structure.

Further, in the drainage method of the present application, a horizontal portion which is disposed substantially horizontally on a floor slab and is connected to a water circulating device, and a bent portion formed between the horizontal portion and a junction portion are formed. The drainage pipe is formed in the equipment, and a part of the pipe at the bent part is placed above the horizontal part, and the drainage flowing from the water circulating equipment to the junction is temporarily sealed with a part of the pipe. The wastewater temporarily sealed at the bent portion is accelerated by the pressure generated by the weight of the wastewater upstream of the sealed portion, flows into the junction, and is further accelerated by the siphon phenomenon. For this reason, the possibility that local drainage lump occurs near the junction is further reduced.

In the drainage method of the present application, drainage from a plurality of appliance drainage pipes is joined at one junction.

A plurality of instrument drainage pipes are connected to one junction, and it is effective from the viewpoint of space saving to join drainage from multiple instrument drainage pipes to this one junction. There is a risk of increasing the possibility of local drainage blockage near the junction where one is connected. However, with the above configuration, the possibility of the occurrence of such wastewater blockage is particularly low, so that a space-saving drainage system is realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a multi-layer structure near a floor slab of a floor to which the present invention is applied, in one embodiment of a drainage system according to the present invention.

FIG. 2 is a front view showing a configuration of a first embodiment of a drainage pipe special joint provided for a drainage system according to the present invention.

FIG. 3 is a front view showing a configuration of a second embodiment of the drainage pipe special joint provided in the drainage system according to the present invention.

FIG. 4 is a sectional view showing a configuration of a third embodiment of a drainage collecting pipe special joint provided for the drainage system according to the present invention.

FIG. 5 is a cross-sectional configuration diagram of a multi-layer structure near a floor slab of a floor to which the present invention is applied, in another embodiment of the drainage system according to the present invention.

FIG. 6 is a front view showing a configuration of a fourth embodiment of a drainage pipe special joint provided for the drainage system according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a configuration of a drainage system according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional configuration diagram of the vicinity of a floor slab of a floor to which the present invention is applied, in one embodiment of a drainage system for a multilayer structure according to the present invention.

As shown in Fig. 1, the drainage pipe special fitting 1 installed on the floor is Predetermined position of the multi-layered structure so that the drainage falls freely by gravity due to the action of gravity C

(Hereinafter referred to as the standing pipe flow position.) A vertical connection is made between the drainage standing pipe 61 from the upper floor and the drainage standing pipe 62 on the lower floor, which is vertically installed. This special joint 1 is installed in the area penetrating the floor slab 91 of the floor, connected to the upper and lower drainage pipes 61, 62, and connecting the drainage from the upper floor to the lower floor 1 1 And a merging pipe section 12 that introduces the instrument drainage on that floor into its main pipe section 11.

The main pipe section 11 of the special joint 1 has an upper end 11 A connected to a drainage pipe 61 from the upper floor, and a lower end 11 B connected to a drainage pipe 62 to the lower floor. And an offset portion 111 in the intermediate region.

In addition, one end 12 A of the merging pipe section 12 of the special joint 1 and the floor slab 91 below the floor 81 on that floor with a gradient of about 1-2 cni / m The instrument drain pipe 71 is connected to one end. The merging pipe section 12 is bent downward by 90 ° at the position of the drainage riser pipe 11 and is vertically piped through the floor slab 91, and the merging pipe section is formed below the floor slab 91. The pipe section 12 is connected to the opening section 112 of the main pipe 11.

(Features of each part of special fitting 1)

(1) Main pipe section 1 1

The main pipe part 11 is a cylindrical pipe, and the cross-sectional inner diameter of each part from the upper end 11 A to the lower end 11 B is the same. Normally, a stainless steel pipe of SUS304TPA having a thickness of 100 A and a thickness of 2 mm specified by JISG3448 is used.

The longitudinal shape of the main pipe 11 is as follows. The center of the inner diameter of the main pipe section 11 is shifted by a predetermined offset amount from the center of the inner diameter of the upper end 11 A by the crank 1 13 from the lower part of the upper end 11 A to form the offset section 1 1 1 . The offset portion 111 is a straight pipe, and then the center of the inner diameter of the main pipe portion 11 is shifted by the crank 114 from the center of the inner diameter of the offset portion by the offset amount. At this time, the center line of the inner diameter near the upper end 11 A coincides with the center line of the inner diameter near the lower end 11 B.

The height H of the offset portion 111 including the cranks 113 and 114 is higher than the height h of the vertical portion 122 of the merging tube portion 12 described later.

Also, the center line of the inner diameter is located on the outer periphery of the crank 1 14 with the center line of the inner diameter near the lower end 1 1 B. Openings 112 are formed so as to match.

(2) Confluence pipe section 1 2

The merging pipe section 12 is an L-shaped cylindrical pipe, and has an elbow section 121 bent at 90 ° downward and a vertical cylindrical straight pipe having a predetermined length connected to one end of the elbow section 121. Part 1 2 2 In the special joint 1, the other end 12A of the elbow section 1 2 1 is connected to the instrument drain pipe 71, and one end of the vertical section 122 is below the floor slab 8 and the opening 1 1 2 of the main pipe 1 1 2 And are joined. At this time, the vertical portion 122 is arranged so that its inner diameter center line is parallel to the inner diameter center line of the offset portion 111 of the main pipe portion 11. The vertical section 122 is to be arranged in the space formed by the offset section 111 of the main pipe section 111, and the penetrating area of the floor slab 91 is compact. For the joining pipe section 12, a stainless steel pipe of SUS304TP—A having a standard of 75 to 80 A and a wall thickness of 2 mm specified by JISG34448 is usually used.

(Effect)

With the configuration of the special joint 1, the following operation and effect can be obtained.

(1) Reduction of drainage from upper floor

Drainage that is accelerated by free fall through the drainage pipe 61 from the upper floor and flows down is decelerated by colliding with the inner wall of the pipe at the crank 11 of the main pipe 11. Further, the drainage flows through the offset portion 111, and is decelerated again by colliding with the inner wall of the pipe at the crank 114.

(2) Acceleration of drainage from the floor

The instrument drainage flowing into one end 12 A of the merging pipe section 12 along the pipe gradient in the instrument drainage pipe 6 passes through the elbow section 121, then falls freely on the vertical section 122, and is accelerated.

(3) Combined deceleration of drainage from the upper floor and accelerated drainage of equipment

At the junction 1 15 of the main pipe section 11 where the above-mentioned decelerated drainage from the upper floor and the above-mentioned accelerated appliance drainage merge, the congestion phenomenon of the drainage is reduced because the difference in flow velocity between the two is small. You. This solves the problem of opening traps and abnormal sounds of plumbing fixtures.

Here, the offset amount of the main pipe part 11 with respect to the offset part 111 is such that the center of the pipe inner diameter is shifted to the extent that the drainage from the upper floor collides with the inner wall of the pipe at the cranks 113 and 114. It should just be.

In addition, the height h of the vertical section 1 2 2 of the merging pipe section 1 2 related to the acceleration of instrument drainage is the height in the vertical direction from the upper surface of the floor slab, and if the height is secured even a little, The drainage is accelerated, and the effect of the present invention is obtained. Specifically, the height h may be more than 0 mm and not more than 1 000 mm. Considering the space downstairs, it is preferable that the thickness be 50 Omm or less.

Here, the state where the special joint of the present invention is applied to one floor is described.However, it may be applied to all floors or each dwelling unit of a multi-layer structure such as an apartment, or may be appropriately selected. The drainage system may be applied only to floors or units.

Hereinafter, an embodiment of a drainage system to which a special joint for drainage pipe having the above-described features of the present invention is applied will be described with reference to the drawings.

(Example 1)

FIG. 2 is a front view showing the configuration of the first embodiment of the drainage collecting pipe special joint provided for the drainage system according to the present invention.

(1) Configuration

The special joint 2 is composed of a main pipe 21 and a junction pipe 22 and both are cylindrical pipes. The main pipe part 21 is an offset formed by bending a stainless steel pipe of SU S 304 TP-A with a thickness of 100 A and a thickness of 2 mm specified by JISG3448 to form a crank 213. Part 2 11, a crank 2 14 formed by bending using the same stainless steel pipe, and a straight pipe 2 1 formed by using the same stainless steel pipe to open the side wall and form a confluence 2 15 2

The confluence pipe section 22 is made of SUS304TP-A stainless steel pipe with a wall thickness of 2 mm and a standard of 80 A specified in JISG 3448, and is bent at 90 ° to the 22 A side at one end. And an elbow portion 22 1 formed by the above-mentioned method and a vertical portion 22 2 having a predetermined length. The other end 22B is subjected to a pipe expansion process in accordance with the standard 10OA. The height h of the vertical part 222 of the merging pipe part 222 was set to 500 mm.

(2) Joining each part

The upper end 2 1 1A of the offset section 2 1 1 of the main pipe section 2 1 The other end 2 11 B is connected to one end 2 14 A of the crank 2 14 by TIG welding. In addition, the other end 2 14 B of the crank 2 14 is joined to the open end of the merging section 2 15 of the straight pipe 2 12 by TIG welding. One end 2 1 2 A of the straight pipe 2 1 2 is joined by TIG welding to the expanded pipe end 2 2 B of the joining pipe section 22, and the other end 2 1 2 B of the joining pipe section 2 2 It is connected to a drainage riser (not shown) to the lower floor by TIG welding.

One end 22 A of the merging pipe portion 22 is connected to an instrument drainage pipe (not shown) by a one-touch clamp jig having an O-ring sealing function.

All of the above TIG welding can be reliably performed by one-pass welding, and their joints are joined without gaps.

(3) Action and effect

With the configuration of the special joint 2, the following operation and effect can be obtained.

① Deceleration of drainage from upper floor

Drainage that is accelerated by free fall from the upper floor through the inside of the drainage pipe and flows down is decelerated by colliding with the inner wall of the pipe at the crank 2 13 of the main pipe section 21. Further, the drainage flows through the offset portion 211 and collides with the inner wall of the pipe at the crank 214 to be decelerated again.

② Acceleration of appliance drainage from the floor

The instrument drainage flowing into one end 22A of the merging pipe section 22 along the pipe gradient in the instrument drainage pipe passes through the elbow section 221 and then falls freely on the vertical section 222 to be accelerated.

(3) Merging of decelerated drainage from the upper floor and accelerated drainage of equipment

The congestion phenomenon of the drainage is reduced because the difference in the flow velocity between the drainage from the decompressed upper floor and the converging pipe part 22 where the accelerated appliance drainage merges is small because the difference between the two flow rates is small. You. This solves the problem of opening traps and abnormal noise in plumbing equipment.

(4) Implementation results

This special joint 2 was actually applied to each floor of an experimental tower equivalent to a 30-story multi-story structure, and the state of drainage from each floor was observed. There was no. In addition, the entire drainage system of a multi-layer structure has no problem with drainage. It was confirmed that it could be discharged outside the water system.

(Example 2)

FIG. 3 is a front view showing a configuration of a second embodiment of the drainage pipe special joint provided for the drainage system according to the present invention.

(1) Configuration

The special joint 3 includes a main pipe section 31 and a junction pipe section 32, both of which are cylindrical pipes. The main pipe section 31 was formed by bending a stainless steel pipe of SU S304 TP-A with a thickness of 100 mm and a thickness of 2 mm specified in JISG3448 to form a crank 313. It is composed of an offset section 311 and an expanded section 312 formed by using a similar stainless steel pipe and expanding the end of the section 312A so that the cross-sectional shape becomes elliptical.

The merging pipe section 32 is made of SUS304TP-A stainless steel pipe with a wall thickness of 2 mm and a standard of 80 A specified in JISG3448. An elbow portion 3221 formed by a shaving process and a vertical portion 3222 having a predetermined length are provided.

In addition, the height h of the vertical part 32 2 of the merging pipe part 32 was set to 350 mm.

(2) Joining each part

The upper end 311A of the offset section 311 of the main pipe section 311 is connected to a drainage riser (not shown) from the upper floor by TIG welding, and the other end 311B is the expanded section 311. It is joined by TIG welding to a part of the ellipse cross section of 3A on the pipe end 2 on the expansion side. Further, the remaining area of the elliptical cross section of the pipe end 312A on the pipe expansion side of the pipe expansion section 312 is joined to the one end 32B of the junction pipe section 32 by TIG welding. Further, the other end 3 12 B of the expanded section 3 12 is connected to a drainage riser (not shown) to the lower floor by TIG welding.

The other end 32 A of the merging pipe section 32 is connected to an instrument drain pipe (not shown) by a one-touch clamp jig.

All of the above TIG welding can be reliably performed by one-pass welding, and their joints are joined without gaps. At the pipe end 3 12 A on the pipe expansion side of the pipe expansion section 3 12, the pipe end 3 11 B of the offset section 3 11 1 of the main pipe section 3 1 and one end 3 2 B of the junction pipe section 3 2 are connected. Although TIG welding is performed, the gap between the pipe ends 311B and 32B is also filled during welding. (3) Action and effect

With the configuration of the special joint 3, the following operation and effect can be obtained.

① Deceleration of drainage from upper floor

Drainage that is accelerated by free fall from the upper floor in the drainage pipe and flows down is decelerated by colliding with the inner wall of the pipe at the crank 3 13 of the main pipe section 31. Further, the drainage flows through the offset part 311 and collides with the inner wall of the pipe at the expanded part 312, so that the speed is reduced again.

② Acceleration of appliance drainage from the floor

The instrument drainage flowing into one end 32A of the merging pipe part 32 along the pipe gradient in the instrument drainage pipe passes through the elbow part 321 and then falls freely on the vertical part 322 to be accelerated.

In the expanded pipe section 312 where the decelerated drainage from the upper floor and the accelerated appliance drainage merge, the difference in flow velocity between the two is small, so that the phenomenon of congestion of drainage is reduced. This eliminates the problems of opening traps and abnormal sounds of plumbing fixtures.

(4) Implementation results

This special joint 3 was actually applied to each floor of an experimental tower equivalent to a 30-story multi-story structure, and the state of drainage from each floor was observed. There was no. In addition, it was confirmed that the entire multi-story drainage system could be discharged outside the drainage system without hindering drainage.

(Example 3)

FIG. 4 is a cross-sectional view showing a configuration of a third embodiment of the drainage pipe special joint provided in the drainage system according to the present invention.

(1) Configuration

The special joint 4 includes a cylindrical pipe of a main pipe section 41, a joining pipe section 42, and a fixing bracket cutout 45.

The main pipe part 41 is an offset set by bending a stainless steel pipe of SUS304TP-A with a thickness of 100 A and a thickness of 2 mm specified in JISG3448 to form the crank 413. Tube section 4 11, an expanded section 4 1 2 formed by using a similar stainless steel pipe so that one end has an elliptical cross-sectional shape, and a rubber packing seal function 2 And a sealing plate 4 15 with a hole.

The converging pipe section 42 has a standard of 80 A and a wall thickness of 2 mm specified by JISG3 448.

5 US304TP—A stainless steel pipe is used, and an elbow section 421, formed by bending at 90 ° on one end 42A side, and a vertical section 4222 having a predetermined length. X.

The fixing fitting unit 45 is a sleeve that is fitted into the through portion of the floor slab 92, and has a fixing fitting fixed to the floor slab 92.

The height h of the vertical portion 422 of the merging pipe portion 422 was set at 100 mm.

(2) Joining each part

The upper end 4 1 1A of the offset section 4 1 1 of the main pipe section 4 1 is connected to the drainage vertical pipe 63 from the upper floor by a one-touch clamp jig 43 with an O-ring seal function. 4 11 B penetrates through one of the holes of the rubber packing of the seal plate 4 15 and enters the inside from the pipe end 4 12 A on the expansion side of the expansion section 4 12. Also, in the remaining area of the elliptical cross section of the pipe end 4 12 A of the pipe expansion section 4 12 on the expansion side, one end 4 2 B of the junction pipe section 4 2 is provided with a hole in the rubber packing of the seal plate 4 15. Is penetrated into the inside through the other side. Further, the other end 4 12 B of the expanded section 4 12 is connected to a drainage standing pipe 64 to the lower floor by a telescopic displacement absorbing joint 44 which can be connected with a one touch having an O-ring seal function.

The other end 42 A of the merging pipe section 42 is connected to an instrument drain pipe (not shown) by a one-touch clamp jig.

All of the above connection parts are connected in a sealed state by a sealing function of rubber or the like, not by welding. Further, the special joint 4 itself is fixed by a fixing bracket unit 45, and is supported by the floor slab 92 while penetrating the floor slab 92. Because of these, the connection can be easily attached and detached.

It becomes possible to easily update 64.

(3) Action and effect

With the configuration of the special joint 4, the following operation and effect can be obtained.

① Deceleration of drainage from upper floor

Drainage accelerated by free fall from the upper floor in the drainage pipe and flowing down collides with the inner wall of the pipe at the crank 4 13 of the main pipe section 41 to be decelerated. Furthermore, the The drainage flows through the offset section 411 and collides with the inner wall of the pipe at the expanded section 412, so that it is decelerated again.

② Acceleration of appliance drainage from the floor

The instrument drainage flowing into one end 42A of the merging pipe part 42 along the pipe gradient in the instrument drainage pipe passes through the elbow part 421, then falls freely on the vertical part 422, and is accelerated.

Since the difference between the flow rates of the decelerated upper floor and the accelerated appliance drainage is small in the expansion section 412 where the drainage congestion phenomenon occurs, the phenomenon of drainage congestion is reduced. This solves the problem of opening traps and abnormal sounds of plumbing fixtures.

(4) Implementation results

This special joint 4 was actually applied to each floor of an experimental stage equivalent to a 30-story multi-story structure, and the drainage status from each floor was observed. There was no phenomenon. In addition, it was confirmed that the entire drainage system with a multi-layer structure could be discharged outside the drainage system without hindering drainage.

The present invention can be applied to the case where the drainage system for each floor is a new drainage system other than the above-mentioned conventional confluent pipe system. The configuration of a drainage system according to another embodiment of the present invention that incorporates the drainage method will be described with reference to the drawings.

FIG. 5 is a cross-sectional configuration diagram near the floor slab of the floor to which the present invention is applied, in the embodiment of the drainage system for a multilayer structure according to the present invention.

The configuration of FIG. 5 is the same as that of the embodiment shown in FIG. 1 except that the main pipe portion 51 is located at a height where the main pipe portion 51 is disposed. This is a mode in which the pressure feed / siphon flow method is adopted. That is, drainage manifold pipe special fittings 5 installed on the floor, between the drainage standing tube 6 6 of the drain stand pipe ⁶ 5 and the lower floor from the upper floor which is the pipe perpendicular to the standpipe flow position C Connected vertically. This special joint 5 is installed under the floor slab 93 of the relevant floor, connected to the upper and lower drainage pipes 65, 66, and connects the main pipe section 51 connecting the drainage from the upper floor to the lower floor and the floor. And a merging pipe section 52 composed of a bundle of flexible pipes 52 for respectively introducing instrument drainage into the main pipe section 51 from the plurality of instruments. (Features of each part of special joint 5)

(1) Main pipe section 5 1

The main pipe section 51 is a cylindrical pipe having an offset section 511 in the middle area, and the cross-sectional inside diameter of each part from the upper end 51A to the lower end 51B is the same, and the upper end 51A is the upper end. The lower end 5 1 B is connected to the drainage riser 66 to the lower floor. Normally, a stainless steel pipe of SU S304 TPA—A having a standard of 100 A and a wall thickness of 2 mm specified by JISG34448 is used.

The shape of the main pipe 51 in the longitudinal direction is as follows. The center of the inner diameter of the main pipe part 51 is shifted from the center of the inner diameter of the upper end 51 A by a predetermined offset amount by the crank 5 13 from the lower part of the upper end 51 A, and the offset part 5 11 is formed. . The offset portion 511 is a straight pipe, and the center of the inner diameter of the main pipe portion 51 is shifted by the crank 514 from the center of the inner diameter of the offset portion by the offset amount. At this time, the inner diameter center line near the upper end 51A and the inner diameter center line near the lower end 51B coincide.

The height H of the offset portion 511 including the cranks 5 13 and 5 14 may be more than Omm and 100 mm or less.

Further, an opening portion 512 and a branch portion 516 are formed on the outer periphery of the crank 514 so that the center line of the inside diameter coincides with the center line of the inside diameter near the lower end 51B.

(2) Confluence pipe section 5 2

The drainage method of the confluent pipe section 52 is a pressure-feed / siphon flow method disclosed in Japanese Patent Application Laid-Open No. 2000-2974447, in which the flow of the fluid in the drain pipe is full. By applying it to a part of the wastewater, the efficiency of drainage is further improved.

The merging pipe section 52 is formed of a bundle of a plurality of cylindrical flexible pipes 52. One end (not shown) of each is connected to the drain of each fixture on that floor, and is installed under the floor 83 and on the floor slab 93 without any gradient. In order to secure water sealing in the vicinity, it is bent at one end above the floor 83, then bent downward again, penetrates the floor 83 again, and furthermore, penetrates vertically through the floor slab 93. . The other end of the flexible pipe 522 is connected to one end of the branch portion 516 of the main pipe 51 below the floor slab 93.

As the height position, from the position above the floor 8 3 to the connection position with one end of the branch portion 5 16 The flexible pipe 5 2 2 is located near the outer periphery of the drainage pipe 6 5 on the floor 8 3 at the height position, and is straight and at the connecting position with one end of the branch portion 5 16 so as to be at the vertical pipe flow position C. The pipe is inclined.

It should be noted that the flexible pipes 522 are arranged near the outer periphery of the drainage riser 65, so that the penetration area of the floor slab 93 is compact.

As the flexible pipe 522, a polybutene pipe, which is a resin pipe having a diameter of 20 mm, is used. In addition, a flexible tube of SUS304 stainless steel of standard 2OA may be used.

(Effect)

With the configuration of the special joint 5, the following operation and effect can be obtained.

(1) Reduction of drainage from upper floor

Drainage flowing from the upper floor through the drainage pipe 65 accelerated by free fall is decelerated by colliding with the inner wall of the pipe at the crank 5 13 of the main pipe part 51. Further, the drainage flows through the offset portion 511 and collides with the inner wall of the pipe at the crank 5 14 to be decelerated again.

(2) Acceleration of drainage from the floor

The drainage of each appliance is sucked by the principle of siphon, and further accelerated by the action of gravity acceleration in a region from a position above the floor 83 as a height position to a connection position with one end of the branch portion 516. The degree of acceleration is larger than that of the conventional merging pipe system.

At the junction 5 15 of the main pipe section 51 where the above-mentioned decelerated drainage from the upper floor and the above-mentioned accelerated equipment drain merge, the difference in flow velocity between the two is reduced, so that the congestion phenomenon of drainage is reduced. You. As a result, the pumping and siphon flow systems disclosed in Japanese Patent Application Laid-Open Publication No. 2000-297447 that make the flow of the fluid in the drainage pipe full are not sufficient. The problem of trap opening and abnormal sound is eliminated.

Here, the offset amount of the offset part 5111 of the main pipe part 51 is such that the center of the pipe inner diameter is shifted to the extent that the drainage from the upper floor collides with the inner wall of the pipe at the cranks 513 and 514. I just need.

In addition, from the position on the floor 83 involved in the acceleration of instrument drainage, If the height h2 to the connection position is at least as high as possible, the instrument drainage is accelerated, and the effects of the present invention can be obtained. Specifically, the length h2 is more than Omm, and preferably, is not less than 2000 mm.

The present invention can be implemented by replacing the merging pipe section in the above-described Embodiments 1 to 3 with a pressure feed / siphon flow system in which the flow of the fluid in the drain pipe is full. Among them, an embodiment of a drainage system in which the configuration of the first embodiment is replaced will be described below with reference to the drawings.

(Example 4)

FIG. 6 is a front view showing a configuration of a fourth embodiment of the drainage pipe special joint provided for the drainage system according to the present invention.

(1) Configuration

The special joint 100 includes a main tube portion 101 of a cylindrical tube and a merging tube portion 102 which is a bundle of a cylindrical flexible tube 102.

The main pipe part 101 was formed by bending a stainless steel pipe of SU S 304 TP-A with a thickness of 2 mm and a standard of 100 A specified by JISG34448 to form a crank 103. Offset portion 101, crank 110 14 formed by bending using the same stainless steel tube, and using the same stainless steel tube to open the side wall to form junction 105 And the formed straight pipe 110 2.

As the flexible pipe 102 of the merging pipe section 102, a polybutene pipe having a diameter of 20 mm is used. One end (not shown) has a terminal finish corresponding to the drain of the appliance, and the other end 1022B has a connection collar (not shown) fitted inside the end. .

The height h2 of the vertical portion of the junction tube section 102 was set to 2000 mm.

(2) Joining each part

Offset section of main pipe section 101 Upper end of 101 1 A 1 1 1 A is drainage riser from upper floor (Not shown) by TIG welding, and the other end 11011B is joined to one end 1014A of the crank 1014 by TIG welding. The other end 1014B of the crank 1014 is joined by TIG welding to the open end of the converging portion 101 of the straight pipe 11012. One end 1 0 1 2 A of the straight pipe 1 0 1 2 is closed with a predetermined number of one-touch push locks 10 16 provided, and the flexible pipe 10 0 2 2 is attached to the push lock 10 16. The other end 1022B into which the connecting collar of the above is fitted is inserted, and both are connected. The other end 10 12 B is also connected by TIG welding to a drainage riser (not shown) to the lower floor.

(3) Action and effect

With the configuration of the special joint 100, the following operation and effect can be obtained.

① Deceleration of drainage from upper floor

Drainage that is accelerated by free fall from the upper floor in the drainage pipe and flows down is decelerated by colliding with the inner wall of the pipe at the crank 101 of the main pipe 101. Further, the drainage flows through the offset portion 1101, and collides with the inner wall of the pipe at the crank 11014, so that the speed is reduced again.

② Acceleration of appliance drainage from the floor

The drainage of each appliance is sucked by the principle of siphon, and the gravity in the area from the above-floor position on the floor to the connecting position with the end 110 A of the straight pipe 110 A as the height position It is accelerated by the action of acceleration. The degree of acceleration is greater than that of the conventional merging pipe method.

The congestion phenomenon of the drainage is reduced because the difference in flow velocity between the main pipe part 101 and the main pipe part 101 where the above-mentioned decelerated drainage from the upper floor and the accelerated equipment drainage merge is small because the two flow rates are small. Is done. As a result, the pressure feed that makes the flow of the fluid in the drainage pipe full as disclosed in Japanese Patent Application Laid-Open No. 2000-29747447 is not sufficient. The problem of trap opening and abnormal sound is eliminated.

(4) Implementation results This special joint 100 was actually applied to each floor of an experimental tower equivalent to a 30-story multi-story structure, and the drainage status from each floor was observed. There was no phenomenon. In addition, it was confirmed that the entire drainage system with a multi-layered structure could be discharged outside the drainage system without interfering with drainage.

INDUSTRIAL APPLICABILITY As described above, by applying the drainage special joint for drainage of the present invention to a drainage system having a multi-layered structure, the problems of breakage of traps and abnormal noise of plumbing fixtures are eliminated. This is possible.

In addition, since the products of the present invention are all formed by processing ordinary pipes, quality control and construction are easy. Since there is no special processing inside the pipe, reliability regarding drainage efficiency is ensured for a long time.

Further, the drainage system having a multilayer structure according to the present invention can efficiently discharge wastewater to the outside of the drainage system as a whole system.

Claims

The scope of the claims

1. A main pipe having an inflow end from a drainage stack and an outflow end to the drainage stack, a drainage inflow end and a drainage outflow end connected to the main pipe. With a merging pipe section,

A crank is formed in the main pipe portion,

An opening is formed in an outer peripheral portion between a central portion of the crank and an outflow side end of the main pipe portion,

The outflow end of the merging pipe is connected to the main pipe through the opening, and is connected to the drainage riser. The connecting portion is arranged so as to be more deviated toward the outflow side end of the main pipe portion than the position of the inflow side end portion of the merging tube portion.

A special joint for drainage pipes characterized by the following.

2. The center of the inner diameter of the connection portion and the center of the opening of the outflow end of the main pipe portion are arranged substantially on the same perpendicular.

The drainage pipe special joint according to claim 1.

3. The merging pipe section has a vertical pipe section near the connection section, and the opening center of the outlet side end of the main pipe section is substantially arranged on the inner diameter center axis of the vertical pipe section. Collective pipe special fitting for drainage described in 2.

4. The drainage collecting pipe special joint according to any one of claims 1 to 3, wherein the opening centers of the outflow-side and inflow-side ends of the main pipe portion are arranged substantially on the same perpendicular.

5. The method according to any one of claims 1 to 4, further comprising a second crank between the crank and an outflow-side end of the merging pipe portion, wherein the connection portion is provided on an outer peripheral portion of the second crank. Special fitting for drainage pipe.

6. The merging pipe portion has a bent portion, and a part of the pipe at the bent portion is arranged closer to the inflow side end portion of the main pipe portion than the drainage inflow side end portion of the merging tube portion. 6. The drainage collecting pipe special joint according to any one of claims 1 to 5, wherein

7. The drainage collecting pipe special joint according to any one of claims 1 to 6, wherein a plurality of the merging pipe sections are connected to the connection section.

8. Drainage risers that penetrate each floor in the vertical direction of the multi-story building, and, for each floor, an instrument drainage pipe that guides drainage from the plumbing equipment on that floor to the drainage riser,

A crank is formed in the drainage riser,

A junction corresponding to the appliance drainpipe is formed in the drainpipe,

The junction is formed below the center of the crank and below the level of the floor slab on the floor corresponding to the appliance drainpipe.

Drainage system characterized by that.

9. A vertical pipe portion is formed near the junction in the appliance drain pipe,

The vertical pipe portion is disposed such that its inner diameter central axis substantially coincides with the inner diameter central axis of the drainage standing pipe below the junction.

The drainage system according to claim 8.

10. The vertical pipe section is formed such that the upper end is at the level of the floor slab and the lower end is the confluence section.

The drainage system according to claim 9.

1 1. The inner diameter center axes of the drainage riser above the crank and the drainage riser below the junction substantially coincide.

The drainage system according to any one of claims 8 to 10.

1 2. A second crank is formed below the crank,

The junction is formed at a part of the second crank.

The drainage system according to any one of claims 8 to 11.

13. The appliance drainpipe has a horizontal portion that is disposed substantially horizontally on the floor slab and is connected to the plumbing device, and a bent portion formed between the horizontal portion and the junction. And

Part of the pipe of the bent portion is disposed above the horizontal portion.

The drainage system according to any one of claims 8 to 12.

14. The drainage system according to any one of claims 8 to 13, wherein a plurality of the appliance drainage pipes are connected to one junction.

1 5. Drainage method where the drainage from the plumbing equipment for each floor is merged into the drainage riser that penetrates each floor in the vertical direction of the multi-story building at each junction at the drainage riser. Law,

The merging section is formed below the level of the floor slab, and the flow of drainage from the plumbing device is accelerated by the height difference between the level of the floor slab and the merging section, A crank is formed in the drainage riser, and the flow of drainage from above the crank is decelerated by the crank.

A drainage method characterized by that:

16. The plumbing device and the junction are connected by an instrument drainage pipe, and drainage from the plumbing device is formed near the junction of the instrument drainage pipe, and a drainage pipe below the junction is formed. Is accelerated by a vertical pipe arranged so that the central axis of

The drainage method according to claim 15.

17. The vertical pipe section is formed such that the upper end is at the level of the floor slab and the lower end is the confluence section.

17. The drainage method according to claim 16.

18. The central axis of the inner diameter of the drainage riser above the crank and the drainage riser below the junction are substantially aligned.

The drainage method according to any one of claims 15 to 17.

19. The drainage that has passed through the crank is decelerated by a second crank formed below the crank, and is guided to the junction formed in a part of the second crank.

The drainage method according to any one of claims 15 to 18.

20. A horizontal portion which is disposed substantially horizontally on the floor slab and is connected to the plumbing device, and a bent portion formed between the horizontal portion and the junction portion are formed in the appliance drainage pipe. And

A part of the pipe of the bent portion is disposed above the horizontal portion,

The drainage flowing from the plumbing device to the junction is temporarily sealed at a part of the pipe.

A drainage method according to any one of claims 15 to 19.

2 1. The drainage from the plurality of appliance drainage pipes is merged at one junction. The drainage method according to any one of claims 15 to 20.

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