JP2004019297A - Drainage system and drainage method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drainage system, a drainage method and a drainage collecting pipe special joint of long-term reliability composed of normal piping to facilitate quality control and construction. <P>SOLUTION: In the drainage method of collecting drain from the kitchen and sanitary equipment of each floor to join in a vertical drain pipe which passes through each floor in the vertical direction of a multistoried building for drainage, the drain from the kitchen and sanitary equipment of each floor is dropped by a prescribed length from the level of a floor slab of each floor to accelerate vertical flow, and the drain from the kitchen and sanitary equipment of each floor is made to join to drain in the vertical drain pipe slowed down by an offset part of the vertical drain pipe directly above the junction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drainage collecting pipe special fitting, a drainage system, and a drainage method applied to a multi-story building.
[0002]
[Prior art]
Conventionally, a drainage system for a multi-story building such as an apartment house is a method in which the drainage for each floor is merged into a single drainage vertical pipe that runs down each floor, dropped to the ground or the basement, and discharged out of the multi-story building. Has taken. For more details on the drainage consolidation method for each floor, the instrument drainage pipe, which is installed horizontally on the underfloor floor for each floor or for each dwelling unit on each floor, is connected at right angles to the drainage riser, and is used for kitchens, wash basins, etc. The drainage collected from the plumbing fixtures joined the drainage stack via the fixture drainage pipe.
[0003]
However, in this merging method, the trap of the plumbing device and the problem of abnormal noise have 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) Since the speed difference between the drainage from the upper floor and the drainage from that floor is large, the fall of the drainage at the junction is inhibited, and the drainage lump is formed.
(3) The inside of the pipe at the junction becomes partially full (terminal state, a so-called drainage congestion phenomenon).
(4) Since the drainage in that part falls in a lump, the pressure fluctuates to the negative pressure side in the upper part of the drainpipe.
(5) The pressure fluctuation affects the instrument drain pipe.
[0004]
As one of the methods for solving the congestion phenomenon at the junction where the above problem is caused, a special drainage joint represented by a sovent system has been developed.
This is to reduce the congestion phenomenon and reduce the cause of negative pressure even if a drainage lump is formed by increasing the horizontal cross-sectional area of the confluence area to take up space.
[0005]
Japanese Patent Application Laid-Open No. 2001-173866 discloses a water-filled state in which a swirl flow of drainage is formed in a pipe by forcibly forming an air layer in the center of the pipe by providing a blade for receiving drainage at a junction. There is disclosed a method for preventing such a situation.
[0006]
[Problems to be solved by the invention]
However, all of the above methods have the effect of reducing the phenomenon of congestion 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 space at the junction, and it becomes heavy because it is made by casting. Therefore, handling during construction was inconvenient. Further, in order to penetrate and hold a concrete slab (hereinafter, referred to as a floor slab) as a floor under the floor, it is necessary to reinforce the holding portion in some cases.
[0007]
(2) Invention disclosed in JP-A-2001-173866
Processing for providing swirling blades in the pipe is required, and quality control is more troublesome than normal pipe. In addition, it is difficult to predict the change in drainage efficiency due to corrosion or foreign matter adhesion during long-term use because the condition inside the pipe cannot be seen.
[0008]
The present invention has been made in view of the above-described problems in the prior art, and is configured with ordinary piping, quality control and construction are easy, and a long-term reliable drainage collecting pipe special fitting, drainage system and The purpose is to provide a drainage method.
[0009]
[Means for Solving the Problems]
The drainage collecting pipe special joint according to the first invention of the present application provided to solve the above-mentioned problem has a cylindrical shape in which the center of the inner diameter of both ends is matched, and has an offset portion having a predetermined length formed by a crank. A main pipe portion having an intermediate portion and an opening formed in the outer peripheral portion of the crank at the center of the inner diameter of the both ends so as to match the center of the inner diameter, and a portion near one end bent at 90 ° and the other end side offset with the offset An L-shaped cylindrical converging pipe portion serving as a vertical pipe portion having a length smaller than the length of the portion, wherein the vertical pipe portion of the converging pipe portion is disposed in parallel with the offset portion, and The tube end of the tube portion is connected to the opening.
[0010]
In the special joint according to the present invention, the following drainage effects can be obtained depending on the shape when the appliance drainage from each floor is introduced from the elbow pipe and merges at the opening.
That is, regarding the drainage from the upper floor flowing through the drainage riser, the position of the offset portion above the offset portion of the main pipe portion from the original position where the drainage flows down in the direction of gravitational acceleration (hereinafter, referred to as a riser flow position). When the position flowing to (hereinafter referred to as an offset position) is offset in the horizontal direction, the flow of the drainage is reduced because it hits the pipe wall of the main pipe portion. Then, at the lower part of the offset portion of the main pipe portion, when the flow returns from the offset position to the standing pipe flow position, the flow of the drainage is decelerated by hitting the pipe wall again.
On the other hand, the instrument drainage from that floor is accelerated by freely falling down the vertical pipe portion via the elbow.
Then, the drainage from the upper floor that has been decelerated at the opening and the accelerated appliance drainage of that floor merge, and the difference in flow velocity between the two is small, so that the congestion phenomenon of the drainage is reduced. Therefore, the problems of opening the trap of the plumbing appliance and the abnormal sound are solved.
Further, since the products of the present invention are all formed by processing ordinary pipes, quality control and construction are easy. In addition, since there is no special processing inside the pipe, long-term reliability regarding drainage efficiency is secured. If a stainless steel pipe such as SUS304TP-A is used as a pipe material, more excellent workability and long-term reliability can be obtained.
[0011]
Here, the offset portion means a portion of the main pipe portion in which the position of drainage is shifted in the horizontal direction from the standing pipe flow position. At this time, the offset amount, that is, the distance deviating from the standing flow position may be determined within a range where the drainage from the upper floor hits the pipe wall by offsetting.
In addition, the straight length of the vertical pipe portion is a length necessary for accelerating the drainage of equipment from the floor. There is an effect as long as there is a straight line portion, and it is preferably 500 mm or less in consideration of the influence on the downstairs.
[0012]
A drainage system according to the second invention of the present application provided to solve the above-mentioned problem is a drainage riser that penetrates each floor in a vertical direction of a multi-story building, and collects, for each floor, drainage from a plumbing device on that floor. A drain slab of a floor corresponding to the instrument drain pipe, wherein the junction section corresponding to the instrument drain pipe is formed in the drain pipe. And an offset part of the drainage riser is formed by a crank immediately above the junction, and the appliance drainage pipe is vertically plumbed with a predetermined length immediately above the junction, and The inner diameter center of the drainpipe and the inner diameter center of the drainage standpipe at the junction are connected so as to coincide with each other.
[0013]
With this system, when the instrument drainage merges at the junction of the drainage riser for each floor, the following drainage effects can be obtained depending on the shape.
That is, when seeing the merging of the appliance drainage on a certain floor, regarding the drainage from the upper floor flowing through the drainage riser, first, at the upper part of the offset part of the drainage riser, the wastewater flows from the riser flow position to the offset position. The drainage flow is decelerated to hit the pipe wall of the drainage riser as the position is offset horizontally. Next, at the lower part of the offset portion of the drainage standing pipe, when the flow returns from the offset position to the standing pipe flow position, the flow of the drainage is decelerated by hitting the pipe wall again.
On the other hand, the instrument drainage from that floor is accelerated by freely falling down the instrument drainage pipe to the junction.
Then, the drainage from the upper floor that has been decelerated at the junction and the accelerated appliance drainage of that floor are merged. Since the difference between the two velocities is small, the congestion phenomenon of the drainage is reduced. Since this effect can be obtained for each floor, the problems of opening the trap of the plumbing fixture and abnormal noise in the entire multi-story building, that is, the drainage system as a whole are solved.
Here, the portion vertically piped at a predetermined length immediately above the junction of the appliance drainage pipe means a portion bent from directly above the floor slab of that floor and vertically piped downwardly of the floor slab. means.
In addition, the “formation of the offset part of the drainage riser and the formation of the drainage accelerating area of the instrument drainage pipe” of the present invention may be applied to all floors of the multi-story building, but may be applied only to appropriately selected floors. It may be.
[0014]
Further, the present invention shows an aspect in which the special joint according to the first invention is applied to a drainage system for a multi-story building. Therefore, quality control and construction are easy because the entire drainage system is composed of all processed ordinary pipes. In addition, since there is no special processing inside the pipe, long-term reliability regarding drainage efficiency is secured. If a stainless steel pipe such as SUS304TP-A is used as a pipe material, more excellent workability and long-term reliability can be obtained.
[0015]
The drainage system according to the third invention of the present application, which is provided to solve the above-described problem, is characterized in that, in the second invention, a predetermined length of the appliance drainage pipe is determined from a level of a floor slab of a floor corresponding to the appliance drainage pipe. The length is the length up to the junction.
[0016]
This ensures the necessary length to accelerate instrument drainage from that floor. The length is effective as long as it is a little as a vertical straight line portion, and is preferably 500 mm or less in consideration of the effect on downstairs.
[0017]
A drainage system according to a fourth aspect of the present invention provided to solve the above-described problem is the drainage system according to the second or third aspect, wherein a predetermined length of the appliance drainage pipe is longer than a pipe length of an offset part of the drainage riser. Is also small.
[0018]
Accordingly, the portion of the appliance drain pipe bent from directly above the floor slab on that floor and vertically piped downward in the floor slab can be arranged at the drain flow position in parallel with the offset portion of the drainage riser. Thereby, the piping in the area from immediately above the floor slab for each floor to the junction of the drainage riser at the bottom of the floor slab becomes compact.
[0019]
The drainage method according to the fifth invention of the present application, which is provided to solve the above problem, collects drainage from the plumbing equipment for each floor to a drainage riser that penetrates each floor in the vertical direction of the multi-story building, and collects the water for each floor In the drainage method of merging and draining, the drainage from the plumbing equipment for each floor is dropped by a predetermined length from the level of the floor slab of each floor to accelerate the flow in the vertical direction, and the water from the plumbing equipment for each floor is accelerated. Immediately above where the drainage merges, the drainage merges with the drainage in the drainage riser decelerated by the offset portion of the drainage riser formed by a crank.
[0020]
By this method, the drainage from the upper floor decelerated at the junction and the accelerated appliance drainage at that floor are merged, and the difference in flow velocity between the two is small, so that the congestion phenomenon of the drainage is reduced. . Since this effect can be obtained for each floor, the problems of opening the trap of the plumbing fixture and abnormal noise in the entire multi-story building, that is, the drainage system as a whole are solved.
[0021]
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 view of a floor slab near 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 collecting pipe special joint 1 installed on the floor has a predetermined position C (hereinafter, referred to as a “C” hereinafter) of the multi-layered structure such that the drainage falls freely in the pipe by the action of gravity. A vertical drain pipe 61 from the upper floor and a vertical drain pipe 62 on the lower floor, which are vertically connected to a vertical pipe flow position, are vertically connected. The special joint 1 is installed in a region penetrating the floor slab 91 of the floor, connected to upper and lower drainage pipes 61 and 62, and a main pipe portion 11 for connecting drainage from an upper floor to a lower floor and a device on the floor. And a merging pipe section 12 for introducing drainage into the main pipe section 11.
The main pipe portion 11 of the special joint 1 has an upper end 11A connected to a drainage riser 61 from an upper floor, a lower end 11B connected to a drainage riser 62 to a lower floor, and an offset portion 111 in an intermediate region. Having.
In addition, one end 12A of the merging pipe portion 12 of the special joint 1 and one end of an instrument drain pipe 71 piped with a gradient of about 1 to 2 cm per meter on the floor slab 91 under the floor 81 of the floor. Are linked. The merging tube portion 12 is bent downward at 90 ° at the position C of the drainage riser 11 and is vertically piped through the floor slab 91. Below the floor slab 91, the merging tube portion 12 is connected to the main pipe. 11 opening portions 112.
[0022]
(Features of each part of special joint 1)
(1) Main pipe section 11
The main pipe part 11 is a cylindrical pipe, and the cross-sectional inner diameter of each part from the upper end 11A to the lower end 11B is the same. Normally, a SUS304TP-A stainless steel pipe having a thickness of 2 mm and a standard of 100A specified in JIS G3448 is used.
The shape of the main pipe 11 in the longitudinal direction is as follows. The center of the inner diameter of the main pipe portion 11 is shifted by a predetermined offset amount from the center of the inner diameter of the upper end 11A by the crank 113 from below the upper end 11A, and the offset portion 111 is formed. The offset section 111 is a straight pipe, and the center of the inner diameter of the main pipe section 11 is shifted by the crank 114 from the center of the inner diameter of the offset section by the offset amount. At this time, the center line of the inner diameter near the upper end 11A coincides with the center line of the inner diameter near the lower end 11B.
Note that the height H of the offset portion 111 including the cranks 113 and 114 is higher than the height h of a vertical portion 122 of the merging tube portion 12 described later.
An opening 112 is formed on the outer periphery of the crank 114 such that the center line of the inner diameter matches the center line of the inner diameter near the lower end 11B.
[0023]
(2) Confluence pipe section 12
The joining pipe section 12 is an L-shaped cylindrical pipe, and includes an elbow section 121 bent downward by 90 ° and a vertical section 122 of a cylindrical straight pipe having a predetermined length connected to one end of the elbow section 121. In the special joint 1, the other end 12A of the elbow portion 121 is connected to the appliance drainage pipe 71, and one end of the vertical portion 122 is joined to the opening 112 of the main pipe 11 below the floor slab 8. 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. In addition, the vertical part 122 will be arrange | positioned in the space formed of the offset part 111 of the main pipe part 11, and the penetration area of the floor slab 91 will be compact.
The joining pipe section 12 is usually a stainless steel pipe of SUS304TP-A having a thickness of 2 mm and a standard of 75 to 80 A specified by JIS G3448.
[0024]
(Effect)
With the configuration of the special joint 1, the following operation and effect can be obtained.
(1) Deceleration of drainage from upper floors
Drainage which is accelerated by free fall from the upper floor and flows through the inside of the drainage pipe 61 is decelerated by colliding with the inner wall of the pipe by the crank 113 of the main pipe part 11. Further, the drainage flows through the offset portion 111 and collides with the inner wall of the pipe at the crank 114 to be decelerated again.
(2) Acceleration of drainage from the floor
The instrument drainage flowing into the one end 12A of the merging pipe section 12 in the instrument drainage pipe 6 according to the pipe gradient passes through the elbow section 121 and then falls freely on the vertical section 122 to be accelerated. (3) Merging of decelerated drainage from the upper floor and accelerated drainage of equipment
At the junction 115 of the main pipe portion 11 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 congestion phenomenon of the drainage is reduced. This solves the problem of opening the trap of the plumbing fixture and the abnormal sound.
[0025]
Here, the offset amount of the main pipe portion 11 with respect to the offset portion 111 may be such that the center of the pipe inner diameter is shifted to such an extent that the drainage from the upper floor collides with the inner wall of the pipe at the cranks 113 and 114.
In addition, the height h of the vertical portion 122 of the merging pipe portion 12 relating to the acceleration of the instrument drainage is the height in the vertical direction from the upper surface of the floor slab, and the instrument drainage is accelerated if the height is secured even a little. Thus, the effects of the present invention can be obtained. Specifically, the height h may be more than 0 mm and 1000 mm or less. In consideration of the space downstairs, it is preferable that the thickness be 500 mm or less.
Although the state where the special joint of the present invention is applied to one floor is described here, the present invention may be applied to all floors or each dwelling unit of a multi-layer structure such as an apartment, or may be appropriately selected. It may be a drainage system applied only to floors or units.
[0026]
Hereinafter, an embodiment of a drainage system to which a special joint for drainage 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 pipe special joint provided for the drainage system according to the present invention.
(1) Configuration
The special joint 2 includes a main pipe part 21 and a merging pipe part 22, both of which are cylindrical pipes.
The main pipe part 21 is formed by bending a stainless steel pipe of SUS304TP-A having a thickness of 2 mm and forming a crank 213 by bending a stainless steel pipe of SUS304TP-A having a thickness of 100 mm specified by JIS G3448 and a similar stainless steel pipe. It is composed of a molded crank 214 and a straight pipe 212 having a side wall opened to form a junction 215 using a similar stainless steel pipe.
The merging tube portion 22 is a stainless steel tube of SUS304TP-A having a thickness of 2 mm and a thickness of 2 mm specified by JIS G3448, and has a predetermined length with an elbow portion 221 formed at one end 22A side by 90 ° bending. And a vertical portion 222 having the same. In addition, the other end 22B is subjected to a pipe expansion process conforming to the standard 100A.
In addition, the height h of the vertical part 222 of the merging pipe part 22 was set to 500 mm.
[0027]
(2) Joining each part
The upper end 211A of the offset portion 211 of the main pipe portion 21 is connected to a drainage standing pipe (not shown) from the upper floor by TIG welding, and the other end 211B is joined to one end 214A of the crank 214 by TIG welding. The other end 214B of the crank 214 is joined to the open end of the junction 215 of the straight pipe 212 by TIG welding. One end 212A of the straight pipe 212 is joined by TIG welding to the expanded pipe end 22B of the joining pipe section 22, and the other end 212B of the joining pipe section 22 is also a drainage riser (not shown) to the lower floor. Are connected by TIG welding.
Further, one end 22A of the merging pipe portion 22 is connected to an instrument drain 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.
[0028]
(3) Effects
With the configuration of the special joint 2, the following operation and effect can be obtained.
(1) Deceleration of drainage from upper floors
Drainage, which is accelerated by free fall from the upper floor and flows through the inside of the drainage pipe, is decelerated by colliding with the inner wall of the pipe by the crank 213 of the main pipe part 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 the one end 22A of the merging pipe part 22 in the instrument drainage pipe according to the pipe gradient passes through the elbow part 221 and then falls freely down the vertical part 222 to be accelerated.
(3) Merging of decelerated drainage from the upper floor and accelerated drainage of equipment
At the junction 215 of the junction 22 where the decelerated drainage from the upper floor and the accelerated instrument drainage merge, the difference in flow velocity between the two is small, so that the congestion phenomenon of the drainage is reduced. This solves the problem of opening the trap of the plumbing fixture and the abnormal sound.
[0029]
(4) Implementation results
This special joint 2 was actually applied to each floor of a 30-story experimental tower equivalent to a multi-story structure, and the state of drainage from each floor was observed. However, there was no traffic jam at the junction of drainage for each floor. . In addition, it was confirmed that the entire drainage system with a multi-layer structure could be discharged outside the drainage system without any problem in drainage.
[0030]
(Example 2)
FIG. 3 is a front view showing the configuration of a second embodiment of the drainage pipe special joint provided in the drainage system according to the present invention.
(1) Configuration
The special joint 3 includes a main pipe part 31 and a merging pipe part 32, and both are cylindrical pipes.
The main tube part 31 is a cross section of one end 312A using the same stainless steel pipe as an offset part 311 formed by bending a SUS304TP-A stainless steel pipe having a thickness of 2 mm and forming a crank 313 by a standard 100A specified by JIS G3448. And an expanded portion 312 that has been expanded so as to have an elliptical shape.
The merging tube portion 32 is a SUS304TP-A stainless steel tube having a thickness of 2 mm and a standard length of 80A specified by JIS G3448, and has a predetermined length with an elbow portion 321 formed by bending 90 ° on one end 32A side. And a vertical portion 322 having the same.
In addition, the height h of the vertical part 322 of the merging pipe part 32 was set to 350 mm.
[0031]
(2) Joining each part
The upper end 311A of the offset part 311 of the main pipe part 31 is connected to a drainage standing pipe (not shown) from the upper floor by TIG welding, and the other end 311B has an elliptical cross section of the pipe end 312A on the expanding side of the expanding part 312. It is joined to a part by TIG welding. 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 one end 32B of the junction pipe section 32 by TIG welding. Further, the other end 312B of the expanded portion 312 is connected to a drainage riser (not shown) to the lower floor by TIG welding.
Further, the other end 32A of the merging pipe portion 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 312A on the pipe expansion side of the pipe expansion part 312, the pipe end 311B of the offset part 311 of the main pipe part 31 and one end 32B of the junction pipe part 32 are TIG-welded, but the pipe end 311B and the pipe end 32B are welded. The gap between them is filled during welding.
[0032]
(3) Effects
With the configuration of the special joint 3, the following operation and effect can be obtained.
(1) Deceleration of drainage from upper floors
Drainage that is accelerated by free fall from the upper floor and flows through the inside of the drainage vertical pipe is decelerated by colliding with the inner wall of the pipe at the crank 313 of the main pipe part 31. Further, the drainage flows through the offset part 311 and collides with the inner wall of the pipe at the expanded part 312 to be decelerated again.
(2) Acceleration of appliance drainage from the floor
The instrument drainage flowing into the one end 32A of the merging pipe section 32 in the instrument drainage pipe according to the pipe gradient passes through the elbow section 321 and then falls freely on the vertical section 322 to be accelerated.
(3) Merging of decelerated drainage from the upper floor and accelerated drainage of equipment
In the expanded pipe section 312 where the decelerated drainage from the upper floor and the accelerated instrument drainage merge, the difference in flow velocity between the two is small, so that the traffic jam phenomenon of the drainage is reduced. This solves the problem of opening the trap of the plumbing fixture and the abnormal sound.
[0033]
(4) Implementation results
This special joint 3 was actually applied to each floor of a 30-story experimental tower equivalent to a multi-story structure, and the state of drainage from each floor was observed, but there was no traffic jam at the junction of the drainage for each floor. . In addition, it was confirmed that the entire drainage system with a multi-layer structure could be discharged outside the drainage system without any problem in drainage.
[0034]
(Example 3)
FIG. 4 is a sectional view showing the configuration of a third embodiment of the drainage collecting 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 fixture unit 45.
The main pipe portion 41 is formed by bending a SUS304TP-A stainless steel pipe having a thickness of 2 mm and a thickness of 2 mm to form a crank 413 by forming a crank 413, and a cross-sectional shape of one end using a similar stainless steel pipe. A pipe expansion section 412 formed by expanding a pipe so as to form an ellipse, and a seal plate 415 having two holes having a rubber packing sealing function.
The merging tube portion 42 is a SUS304TP-A stainless steel tube with a thickness of 2 mm and a standard length of 80A specified by JIS G3448, and has a predetermined length with an elbow portion 421 formed by bending 90 ° on one end 42A side. And a vertical portion 422 having the same.
The fixing bracket unit 45 is a sleeve that is fitted into the through portion of the floor slab 92, and includes a fixing bracket that is fixed to the floor slab 92.
In addition, the height h of the vertical part 422 of the merging pipe part 42 was set to 100 mm.
[0035]
(2) Joining each part
The upper end 411A of the offset portion 411 of the main pipe portion 41 is connected to the drainage riser 63 from the upper floor by a one-touch clamp jig 43 having an O-ring sealing function, and the other end 411B is formed of a rubber packing of the seal plate 415. The tube is inserted into one of the holes from the tube end 412A on the tube expanding side of the tube expanding portion 412. One end 42B of the merging pipe portion 42 is inserted into the remaining portion of the elliptical cross section of the pipe end 412A on the expanding side of the expanding portion 412 through the other of the rubber packing holes of the seal plate 415. Further, the other end 412B of the expanded pipe section 412 is connected to the drainage standing pipe 64 to the lower floor by a telescopic displacement absorbing joint 44 which has an O-ring seal function and can be connected with one touch.
The other end 42A of the merging pipe portion 42 is connected to an instrument drain pipe (not shown) by a one-touch clamp jig.
All the connecting portions 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 the fixing bracket unit 45, and is supported by the floor slab 92 while penetrating the floor slab 92. Because of these, the connection and detachment of the connecting portion can be easily performed, so that it is possible to easily update the special joint 4 or update the drainage standing pipes 63, 64.
[0036]
(3) Effects
With the configuration of the special joint 4, the following operation and effect can be obtained.
(1) Deceleration of drainage from upper floors
Drainage that is accelerated by free fall from the upper floor and flows through the inside of the drainage stack is decelerated by colliding with the inner wall of the pipe at the crank 413 of the main pipe section 41. Further, the drainage flows through the offset section 411 and collides with the inner wall of the pipe at the expanded section 412, so that the speed is reduced again.
(2) Acceleration of appliance drainage from the floor
The instrument drainage flowing into the one end 42A of the merging pipe part 42 in the instrument drainage pipe according to the pipe gradient passes through the elbow part 421 and then falls freely down the vertical part 422 to be accelerated.
(3) Merging of decelerated drainage from the upper floor and accelerated drainage of equipment
In the expanded pipe section 412 where the decelerated drainage from the upper floor and the accelerated instrument drainage merge, the difference in flow velocity between the two is small, so that the traffic jam phenomenon of the drainage is reduced. This solves the problem of opening the trap of the plumbing fixture and the abnormal sound.
[0037]
(4) Implementation results
This special joint 4 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. However, there was no traffic jam at the junction of the drainage for each floor. . In addition, it was confirmed that the entire drainage system with a multi-layer structure could be discharged outside the drainage system without any problem in drainage.
[0038]
The present invention can be applied to a case where the drainage system for each floor is a new drainage system other than the conventional merged pipe system described above. The configuration of another embodiment of the drainage system according to 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 for the height position at which the main pipe portion 51 is arranged, and the merging pipe portion 52 is a pressure feed / siphon that makes the flow of the fluid in the drain pipe full. This is a mode in which a flow method is adopted. That is, the drainage collecting pipe special joint 5 installed on the floor is vertically connected between the drainage riser 65 from the upper floor and the drainage riser 66 on the lower floor, which is piped vertically to the riser flow position C. Connected to The special joint 5 is installed below the floor slab 93 of the floor, connected to the upper and lower drainage risers 65, 66, and connects the drainage from the upper floor to the lower floor with a plurality of instruments on the floor. And a merging pipe section 52 composed of a bundle of flexible pipes 522 for independently introducing instrument drainage into the main pipe section 51.
[0039]
(Features of each part of special joint 5)
(1) Main pipe part 51
The main pipe part 51 is a cylindrical pipe having an offset part 511 in an intermediate region, and has the same sectional inner diameter from the upper end 51A to the lower end 51B, and the upper end 51A is connected to a drainage pipe 65 from the upper floor. , Lower end 51B is connected to a drainage riser 66 to the lower floor. Normally, a SUS304TP-A stainless steel pipe having a thickness of 2 mm and a standard of 100A specified in JIS G3448 is used.
The shape of the main pipe portion 51 in the longitudinal direction is as follows. The center of the inner diameter of the main pipe portion 51 is shifted by a predetermined offset amount from the center of the inner diameter of the upper end 51A by the crank 513 from the lower portion of the upper end 51A, and the offset portion 511 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 center line of the inner diameter near the upper end 51A coincides with the center line of the inner diameter near the lower end 51B.
The height H of the offset portion 511 including the cranks 513 and 514 may be more than 0 mm and 1000 mm or less.
An opening 512 and a branch 516 are formed on the outer periphery of the crank 514 so that the center line of the inner diameter coincides with the center line of the inner diameter near the lower end 51B.
[0040]
(2) Confluence pipe part 52
The drainage method of the merged pipe section 52 is a pressure feed / siphon flow method disclosed in Japanese Patent Application Laid-Open No. 2000-297449, in which the flow of the fluid in the drainage pipe is full, and is applied to a part of the present invention. It also improves drainage efficiency.
The merging pipe section 52 is formed by a bundle of a plurality of cylindrical flexible pipes 522. One end (not shown) of each is connected to the drain of each appliance on that floor, is piped under the floor 83 on the floor slab 93 without gradient, and is sealed near the position C of the drainage vertical pipe 65. In order to secure water, it is bent once above the floor 83, bent downward again, penetrates the floor 83 again, and further penetrates through the floor slab 93, and is piped vertically downward. The other end of the flexible pipe 522 is connected to one end of the branch 516 of the main pipe 51 below the floor slab 93.
The flexible pipe 522 from the position above the floor 83 as the height position to the connection position with one end of the branch portion 516 is located near the outer periphery of the drainage pipe 65 on the height position floor 83, and is connected to one end of the branch portion 516. At the connection position, the pipe is linearly and obliquely arranged so as to be at the standing pipe flow position C.
In addition, the flexible pipe 522 is disposed near the outer periphery of the drainage riser 65, and 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 having a standard of 20A may be used.
[0041]
(Effect)
With the configuration of the special joint 5, the following operation and effect can be obtained.
(1) Deceleration of drainage from upper floors
Drainage which is accelerated by free fall from the upper floor and flows through the inside of the drainage pipe 65 is decelerated by colliding with the inner wall of the pipe at the crank 513 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 514 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 gravitational 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.
(3) Merging of decelerated drainage from the upper floor and accelerated drainage of equipment
At the junction 515 of the main pipe portion 51 where the decelerated drainage from the upper floor and the accelerated appliance drainage merge, the difference in flow velocity between the two is reduced, so that the congestion phenomenon of the drainage is reduced. As a result, the trapping and abnormal sound of a plumbing device that was insufficient with the pressure-feeding / siphon flow system that makes the flow of the fluid in the drainage pipe full as disclosed in Japanese Patent Application Laid-Open No. 2000-297747 were insufficient. Problem is solved.
[0042]
Here, the offset amount of the offset portion 511 of the main pipe portion 51 may be such that the center of the pipe inner diameter is shifted to such an extent that the drainage from the upper floor collides with the inner wall of the pipe at the cranks 513 and 514.
Further, the height h2 from the position on the floor 83 related to the acceleration of the instrument drainage to the connection position with one end of the branch portion 516 is accelerated as far as the height is secured, and the instrument drainage is accelerated. The effect is obtained. Specifically, the height h2 is more than 0 mm, preferably 2000 mm or more.
Although the state where the special joint of the present invention is applied to one floor is described here, the present invention may be applied to all floors or each dwelling unit of a multi-layer structure such as an apartment, or may be appropriately selected. It may be a drainage system applied only to floors or units.
[0043]
The present invention can be all implemented by replacing the merging pipe section in the above-described first to third embodiments with a pumping / siphon flow system in which the flow of the fluid in the drain pipe is full. Among them, an embodiment of the 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 the configuration of the fourth embodiment of the drainage pipe special joint provided in the drainage system according to the present invention.
(1) Configuration
The special joint 100 includes a main pipe part 101 of a cylindrical pipe and a merging pipe part 102 which is a bundle of a cylindrical flexible pipe 1022.
The main pipe part 101 is formed by bending a stainless steel pipe of SUS304TP-A having a thickness of 2 mm and forming a crank 1013 by bending a stainless steel pipe of SUS304TP-A having a thickness of 100 mm and the same stainless steel pipe as specified in JIS G3448. It is composed of a molded crank 1014 and a straight pipe 1012 formed by using a similar stainless steel pipe and opening its side wall to form a junction 1015.
As the flexible pipe 1022 of the merging pipe section 102, a polybutene pipe having a diameter of 20 mm is used. One end (not shown) is subjected to terminal processing corresponding to the drain port of the appliance, and a collar (not shown) for connection is fitted inside the other end of the other end 1022B.
In addition, the height h2 of the vertical part of the merging pipe part 1022 was set to 2000 mm.
[0044]
(2) Joining each part
The upper end 1011A of the offset portion 1011 of the main pipe portion 101 is connected to a drainage standing pipe (not shown) from the upper floor by TIG welding, and the other end 1011B is joined to one end 1014A of the crank 1014 by TIG welding. The other end 1014B of the crank 1014 is joined to the open end of the junction 1015 of the straight pipe 1012 by TIG welding. One end 1012A of the straight pipe 1012 is closed after providing a predetermined number of one-touch type push locks 1016, and the other end 1022B in which the connection collar of the flexible pipe 1022 is fitted is inserted into the push lock 1016. Are connected. The other end 1012B is also connected by TIG welding to a drainage riser (not shown) to the lower floor.
All of the above TIG welding can be reliably performed by one-pass welding, and their joints are joined without gaps.
[0045]
(3) Effects
With the configuration of the special joint 100, the following operation and effect can be obtained.
(1) Deceleration of drainage from upper floors
Drainage that is accelerated by free fall from the upper floor and flows through the inside of the drainage stack is decelerated by colliding with the inner wall of the pipe at the crank 1013 of the main pipe 101. Further, the drainage flows through the offset portion 1011 and collides with the inner wall of the pipe at the crank 1014 to be decelerated again.
(2) Acceleration of appliance drainage from the floor
The drainage of each appliance is sucked by the principle of siphon, and further accelerated by the action of gravitational acceleration in the region from the above-floor position on the floor to the connection position with one end 1012A of the straight pipe 1012 as the height position. The degree of acceleration is larger than that of the conventional merging pipe system.
(3) Merging of decelerated drainage from the upper floor and accelerated drainage of equipment
At the junction 1015 of the main pipe section 101 where the decelerated drainage from the upper floor and the accelerated instrument drainage merge, the difference in flow velocity between the two is reduced, so that the congestion phenomenon of the drainage is reduced. As a result, the trapping and abnormal sound of a plumbing fixture that was insufficient with the pressure-feed / siphon flow system that makes the flow of the fluid in the drain pipe full as disclosed in JP-A-2000-297747 was insufficient. Problem is solved.
[0046]
(4) Implementation results
This special joint 100 was actually applied to each floor of a 30-story experimental tower equivalent to a multi-story structure, and the state of drainage from each floor was observed, but there was no traffic jam at the junction of the drainage for each floor. . In addition, it was confirmed that the entire drainage system with a multi-layer structure could be discharged outside the drainage system without any problem in drainage.
[0047]
【The invention's effect】
As described above, by applying the drainage special joint for drainage of the present invention to a drainage system having a multi-layer structure, the problems of opening the trap of the plumbing fixture and abnormal noise can be solved. 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, long-term reliability regarding drainage efficiency is also ensured.
Further, with the drainage system for a multi-layer structure of the present invention, the entire system can be efficiently discharged to the outside of the drainage system without hindrance to drainage.
[Brief description of the drawings]
FIG. 1 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 one embodiment of a drainage system according to the present invention.
FIG. 2 is a front view showing the configuration of a first embodiment of a drainage collecting pipe special joint provided in the drainage system according to the present invention.
FIG. 3 is a front view showing the configuration of a second embodiment of the drainage collecting pipe special joint provided for the drainage system according to the present invention.
FIG. 4 is a cross-sectional view showing a configuration of a third embodiment of a drainage pipe special joint provided in a drainage system according to the present invention.
FIG. 5 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 another embodiment of the drainage system according to the present invention.
FIG. 6 is a front view showing the configuration of a fourth embodiment of a drainage pipe special joint provided in the drainage system according to the present invention.
[Explanation of symbols]
1-5, 100 ... Special fitting for drainage pipe
11, 21, 31, 41, 51, 101 ... main pipe section
12, 22, 32, 42, 52, 102 ... Confluence pipe section
43… Clamp jig
44… Telescopic displacement absorption joint
45… Fixing unit
61-66… Drainage standpipe
71 ... Instrument drain pipe
81, 83… floor
91, 92, 93 ... Floor slab
111, 211, 311, 411, 511, 1011 ... offset part
112, 512 ... opening
113, 114, 213, 214, 313, 413, 513, 514, 1013, 1014 ... crank
121, 221, 321, 421 ... Elbow part
122, 222, 322, 422 ... vertical part
212, 1012… straight pipe
115, 215, 515, 1015 ... junction
312, 412 ... expansion part
415… Seal plate
11A, 51A: Upper end of main pipe
11B, 51B ... lower end of main pipe
12A, 22A, 32A ... one end of the merging tube
12B, 22B, 32B ... the other end of the junction tube
211A, 311A, 1011A ... upper end of offset portion
211B, 311B, 1011B ... The other end of the offset portion
214A, 1014A ... one end of the crank
214B, 1014B ... the other end of the crank
212A, 1012A ... one end of a straight pipe
212B, 1012B ... the other end of the straight pipe
312A: End of pipe on expansion side of expansion section
312B ... the other end of the expanded section
C ... Standing pipe flow position
H: Offset height
h1, h2: height of the vertical part of the merging pipe

Claims (5)

It has a cylindrical shape in which the center of the inner diameter of both ends is matched, has an offset portion of a predetermined length formed by the crank in the middle, and matches the center of the inner diameter with the center of the inner diameter of both ends to the outer peripheral portion of the crank. A main pipe portion having an opening formed therein,
An L-shaped cylindrical converging pipe portion that is bent at 90 ° near one end and the other end side is a vertical pipe portion having a length smaller than the length of the offset portion;
A special joint for drainage drainage, wherein a vertical pipe portion of the merging pipe portion is arranged in parallel with the offset portion, and a pipe end of the vertical pipe portion is connected to the opening. Equipped with a drainage plumbing that penetrates each floor in the vertical direction of the multi-story building, and an instrument drainage pipe that collects the drainage from the plumbing equipment on that floor for each floor and guides it to the drainage plumbing. In a drainage system in which the junction is formed in the drainage stack,
The junction is located below the level of the floor slab on the floor corresponding to the appliance drainpipe, and an offset part of the drainage riser is formed by a crank immediately above the junction,
The appliance drain pipe is vertically piped at a predetermined length immediately above the junction, and the center of the inner diameter of the appliance drain pipe and the center of the inner diameter of the drainage riser at the junction are connected and connected. Drainage system. The drainage system according to claim 2, wherein the predetermined length of the appliance drainage pipe is a length from a level of a floor slab of a floor corresponding to the appliance drainage pipe to the junction. The drainage system according to claim 2, wherein a predetermined length of the appliance drainage pipe is smaller than a pipe length of an offset portion of the drainage riser. In the drainage method of collecting drainage from the plumbing equipment for each floor and merging each floor to drainage stacks that penetrate each floor in the vertical direction of the multi-story building,
By accelerating the vertical flow by dropping the drainage from the plumbing equipment for each floor from the level of the floor slab of each floor for a predetermined length,
A drainage method, wherein the drainage from a drainage device in each floor is joined immediately above the drainage in the drainage standpipe decelerated by an offset portion of the drainage standpipe formed by a crank immediately above the drainage join.

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