CN110397123B

CN110397123B - Piping construction method for siphon drainage system

Info

Publication number: CN110397123B
Application number: CN201910335783.1A
Authority: CN
Inventors: 佐佐木敏
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2018-04-25
Filing date: 2019-04-24
Publication date: 2022-06-24
Anticipated expiration: 2039-04-24
Also published as: JP2019190123A; CN110397123A; TW201945632A; JP7070851B2

Abstract

The invention provides a piping construction method of a siphon drainage system, which can horizontally support a horizontal pipe even if the ground is uneven. The piping construction method is a piping construction method of a siphon drainage system including a horizontal pipe (22) disposed along a floor surface for flowing drainage water from a water using appliance, a downpipe connected to a downstream side in a drainage direction of the horizontal pipe (22) and bent downward, and a vertical pipe connected to a downstream side of the downpipe and extending downward, wherein the piping construction method includes the steps of: the cross pipe (22) is kept horizontal by supporting at least one of the cross pipe (22) and the downpipe from the ground by means of a support member (32) for suspending the at least one pipe from the ground.

Description

Piping construction method for siphon drainage system

Technical Field

The invention relates to a piping construction method of a siphon drainage system.

Background

The siphon drainage system is provided with a siphon drainage pipe, and the siphon drainage pipe comprises: a horizontal pipe disposed on the ground and used for enabling the drainage from the water using appliance to flow in the horizontal direction; a vertical pipe arranged on the downstream side of the horizontal pipe along the vertical direction and used for generating siphon force; and a downpipe for connecting the horizontal pipe and the vertical pipe.

In the siphon drainage system, when water is drained from a water-using appliance, the cross pipe is first in a full-flow state, then the inside of the vertical pipe is in a full-flow state, and the drained water in the vertical pipe in the full-flow state falls to generate siphon force, thereby performing efficient drainage (see, for example, japanese patent application laid-open No. 2012 and 216910).

However, in collective housing such as an apartment house, a horizontal pipe is disposed on the ground (referred to as a floor in the case of concrete). Here, if the floor surface is uneven (uneven surface), for example, if the cross pipe disposed on the floor surface is inclined downward toward the downstream direction, more time is required until the flow in the cross pipe becomes full than in the case of being horizontal. As a result, more time is required until the flow in the standpipe becomes full, and more time is required until the standpipe generates siphon force.

This is because, if a gradient is provided on the upstream side of the cross pipe, when the drain starts to flow out of the water-consuming appliance, the upstream air in the pipe is on the upper side and the drain is on the lower side, and the air in the pipe flows backward toward the upstream side, so that it takes a long time until the upstream side of the cross pipe becomes full flow. Therefore, it is necessary to horizontally arrange the cross pipe by some method.

Disclosure of Invention

Problems to be solved by the invention

However, the work of adjusting unevenness of the finished floor is extremely complicated, and time and cost are required. Further, since a drain pipe of a toilet, a hot and cold water pipe of a bathroom and a kitchen, a gas pipe, and the like are laid on the floor, the horizontal pipe must be disposed so as to avoid the above-mentioned pipes, and there is room for improvement.

In view of the above circumstances, an object of the present invention is to provide a pipe installation method for a siphon drainage system capable of horizontally supporting a horizontal pipe even when the floor surface is uneven.

Means for solving the problems

A method of constructing a siphon drain system according to claim 1, the siphon drain system including a horizontal pipe disposed along a floor surface for allowing drain water from a water-using appliance to flow, a downpipe connected to a downstream side in a drainage direction of the horizontal pipe and bent downward, and a vertical pipe connected to a downstream side of the downpipe and extending downward, the method comprising: the horizontal pipe is maintained horizontally by supporting at least one of the horizontal pipe and the downpipe from the ground using a buoyant member for suspending the at least one pipe.

In this piping construction method, at least one of the horizontal pipe and the downpipe is suspended from the ground by the floating member in the step of holding the horizontal pipe horizontal. Therefore, the cross pipe can be horizontally supported regardless of the unevenness of the ground.

By supporting the cross pipe horizontally in this manner, siphon suction can be generated earlier than in a siphon drainage system in which the cross pipe is disposed on an uneven floor surface.

Further, in the conventional piping construction method, when the floor surface on which the horizontal pipe is disposed is uneven, the horizontal pipe is required to be leveled over the entire length of the horizontal pipe, and therefore the construction work is complicated, but in the piping construction method according to claim 1, the horizontal pipe can be easily leveled only by supporting the horizontal pipe at appropriate intervals by the floating members.

In this piping construction method, the cross pipe can be suspended from the ground, and therefore, the cross pipe can be passed over another piping.

A method of constructing a siphon drain system pipe according to claim 1, wherein in claim 2, the floating member suspends the horizontal pipe from the floor surface by a holding mechanism including at least 1 leg portion provided on the floor surface and a pipe holding portion provided on a side portion of one side of the leg portion and holding the horizontal pipe.

In the pipe construction method, the floating member has at least 1 leg portion, and the leg portion is provided on the ground. A pipe holding part is provided on one side of the leg part, and the horizontal pipe is suspended from the ground by holding the horizontal pipe on the pipe holding part. Since the pipe holding portion is provided on one side of the leg portion, for example, the pipe holding portion is disposed at a corner, in other words, near the wall, and the leg portion is disposed on the opposite side of the pipe holding portion from the wall, whereby the cross pipe can be disposed near the wall. Therefore, the cross pipe can be horizontally arranged without being affected by various floor conditions.

According to the siphon drainage system piping construction method of claim 2, in claim 3, the height of the pipe holding portion from the floor surface can be adjusted by changing a connection portion where the pipe holding portion is connected to the leg portion.

In this piping construction method, the connection position where the piping holding portion is connected to the leg portion, in other words, the height position of the piping holding portion can be changed, and adjustment for leveling the horizontal pipe is facilitated.

In the method of constructing a siphon drain system according to claim 2, according to claim 4, the leg portion has an anchor portion to be buried in the ground and a rod member having an external thread portion that is screwed into an internal thread portion of the anchor portion.

In this pipe construction method, the anchor portion is buried and fixed in the ground, and the leg portion is fixed to the ground by screwing the external thread portion of the leg portion into the internal thread portion of the anchor portion fixed to the ground.

In the method of constructing a siphon drain system according to claim 3, according to claim 5, the leg portion has an anchor portion to be buried in the ground and a rod member having an external thread portion that is screwed into an internal thread portion of the anchor portion.

The method of constructing a siphon drain system according to any one of claims 1 to 5, according to claim 6, comprises the steps of: a fixing step of fixing the horizontal portion of the downpipe to the floor in an instrument box provided outside the living room of the resident by inserting the vertical portion of the downpipe or the standpipe into a hole formed in the floor in the instrument box; a cement curing step of filling a gap between the vertical portion of the downpipe or the vertical pipe and the hole with a cement to cure the cement; and a surface finishing step of performing surface finishing by allowing cement to flow onto the ground surface in the instrument box after the fixing step.

In this piping installation method, in the fixing step, the vertical portion or the standpipe of the drop pipe is inserted through a hole formed in the floor surface in an instrument box provided outside the living room of the resident, and the horizontal portion of the drop pipe is fixed to the floor surface in the instrument box by the floating member.

In the cement curing step, the cement is cured by filling the gap between the vertical portion of the downcomer or the riser and the hole in the ground with the cement.

In addition, in the surface finishing step, since the surface finishing is performed by allowing the cement to flow into the ground surface in the instrument box after the fixing step, the ground surface in the instrument box can be made beautiful.

ADVANTAGEOUS EFFECTS OF INVENTION

As described above, according to the pipe construction method of the siphon drainage system of the present invention, the horizontal pipe can be horizontally supported even when the floor surface is uneven.

Drawings

Fig. 1 is a side view showing a siphon drainage system constructed by a pipe construction method of a siphon drainage system according to an embodiment of the present invention.

Fig. 2 is a side view showing a main part of a siphon drainage system, in which a supporting state of a cross pipe is shown.

Fig. 3 is a perspective view showing a support member used in a method for constructing a pipe of a siphon drainage system according to an embodiment of the present invention.

Fig. 4 is a perspective view showing a support member according to another embodiment.

Fig. 5 is a plan view of a kitchen system to which a piping construction method of a siphon drainage system according to an embodiment of the present invention can be applied.

Fig. 6 (a) is a sectional view showing a siphon drainage system. Fig. 6 (B) is an enlarged cross-sectional view taken along line 6B-6B in fig. 6 (a) showing the positional relationship between the pipe and the cross pipe.

Description of the reference numerals

10. A siphon drainage system; 14. floor (ground); 14A, step floor (ground); 15. a living room; 16. a water-using appliance; 22. a transverse tube; 24. an instrument box; 26. a downpipe; 26A, a horizontal part; 26B, a vertical part; 32. a support member (floating member); 34. a vertical tube; 46. an anchor portion (leg portion); 48. a lever member (leg, holding mechanism); 52. a pipe holder (pipe holding part, holding mechanism).

Detailed Description

One embodiment of a siphonic drainage system is illustrated with reference to figure 1. Fig. 1 schematically shows the overall configuration of a siphon drainage system 10 according to the present embodiment. The siphon drainage system 10 of the present embodiment is a drainage system that efficiently discharges drainage from a water-using appliance by utilizing siphon force.

As shown in fig. 1, the siphon drainage system 10 of the present embodiment is applied to a collective housing made up of a plurality of floors (only predetermined floors are shown in fig. 1). The collective housing includes a vertical drain pipe 12 for allowing drain water to flow downward. The vertical drainage pipe 12 extends in the vertical direction of the collective housing and penetrates through concrete floors 14 of each floor of the collective housing. Further, the siphon drainage system of the present invention is suitably applied to collective housing, but may be applied to independent housing, factory, and the like other than collective housing.

In each household of the collective housing, a water-using appliance 16 as an example of the water-using appliance of the present invention is provided on a floor member 17 of a living room 15 (the right side of a wall DL shown by a two-dot chain line in fig. 1), and a drain trap 18 is connected to the downstream side of the water-using appliance 16 in the drainage direction.

As shown in fig. 1 and 2, a region below a place where a water-using appliance 16 is disposed in a floor 14 below a living room 15 is a recessed step floor 14A that is lowered by one step to allow various pipes to pass therethrough. As an example, the height H1 from the upper surface of the floor slab 14 to the upper surface of the floor member 17 is about 130mm, the height H2 from the upper surface of the stepped floor 14A to the upper surface of the floor member 17 is about 240mm, and the thickness t of the floor member 17 is about 30 mm.

As shown in fig. 1, an L-letter shaped piping member 20 bent into an L-letter shape is disposed on the downstream side in the drainage direction of the drainage trap 18. The L-letter shaped piping member 20 includes: a vertical portion 20A connected to the drain trap 18 and extending in the vertical direction; a horizontal portion 20B arranged above the step floor 14A in the horizontal direction and extending in the horizontal direction; and a bent portion 20C connecting the vertical portion 20A and the horizontal portion 20B. For example, a product (also referred to as an elbow) made of a synthetic resin such as a hard vinyl chloride resin can be used as the L-letter shaped piping member 20.

A horizontal pipe 22 constituting a part of the siphon drain pipe 21 is disposed on the downstream side in the drainage direction of the L-letter shaped piping member 20. In the cross pipe 22 of the present embodiment, flexible synthetic resin pipes having a nominal diameter of 20, which are defined by JISK6778 and JISK6792, are used. As the synthetic resin piping used for the horizontal pipe 22, for example, a flexible polybutylene pipe can be used, but other types of synthetic resin piping can be used. The cross pipe 22 is not limited to a pipe having a nominal diameter of 20, and a pipe having a nominal diameter of 25 may be used.

Instrument boxes 24 are provided outside the living room 15 on the downstream side of the cross pipes 22 in the drainage direction. In the present embodiment, the floor 14B of the instrument box 24 and the step floor 14A below the living room 15 are continuously connected in the horizontal direction.

A downpipe 26 bent in an L shape, which constitutes a part of the siphon drain pipe 21, is disposed in the instrument box 24. The downpipe 26 includes: a horizontal portion 26A arranged above the step floor 14A and extending in the horizontal direction; a vertical portion 26B extending in the vertical direction; and a bent portion 26C connecting the horizontal portion 26A and the vertical portion 26B. As the downpipe 26, for example, a product (for example, also referred to as an elbow) made of a synthetic resin such as a hard vinyl chloride resin can be used.

A vertical pipe 34 extending in the vertical direction and constituting a part of the siphon drain pipe 21 is disposed on the downstream side in the drainage direction of the downpipe 26. The standpipe 34 is connected to the plumb portion 26B of the downspout 26 by a fitting 36. The end portion on the downstream side in the drainage direction of the standpipe 34 is connected to a confluence joint 38 attached to the middle portion of the drainage standpipe 12. In addition, the standpipe 34 of the present embodiment may use the same piping as the cross pipe 22.

(supporting structure of horizontal pipe Member)

The upstream end of the cross pipe 22 is connected to the horizontal portion 20B of the L-letter shaped piping member 20 via a joint 28, and the downstream end of the cross pipe 22 is connected to the horizontal portion 26A of the downpipe 26 via a joint 30.

The cross tubes 22 are horizontally supported at a plurality of locations at the lengthwise intermediate portions thereof by a plurality of floating members, for example, support members 32, which are vertically provided on the step floor 14A, and thus the cross tubes 22 are disposed above the step floor 14A separately from the step floor 14A. In other words, cross tube 22 is suspended from step floor 14A.

(Structure of supporting Member)

Next, the supporting member 32 as an example of the floating member will be described with reference to fig. 2 and 3.

The support member 32 includes an anchor portion 46 and a rod member 48 as an example of a leg portion, and a hexagonal nut 50 and a pipe holder 52 as an example of a pipe holder.

The rod member 48 has a male thread 48A formed over the entire range from one end side to the other end side in the longitudinal direction, and the rod member 48 is also referred to as a full-thread screw, a thread, or a harness. In the present embodiment, the rod member 48 having a diameter of 10mm is used as an example, but the diameter of the rod member 48 is not limited to 10 mm.

The anchor portion 46 is a so-called mandrel driving type anchor portion that is inserted into and fixed to a hole 64 (see fig. 2) formed in the stepped floor 14A, and is formed with a female thread 46A (see fig. 3) to which the male thread 48A of the rod member 48 is screwed.

As shown in fig. 3, the pipe holder 52 has a pipe receiving portion 56 and a pipe receiving portion 58, whose ends are pivotally supported by the hinge portion 54 in a semicircular shape so as to be rotatable. A clamping piece 56A extends from an end of the pipe receiving portion 56 opposite to the hinge portion, and a clamping piece 58A extends from an end of the pipe receiving portion 58 opposite to the hinge portion. The clamping pieces 56A and 58B are formed with through-holes 60 through which the lever members 48 can be inserted.

The pipe holder 52 can be set in two states, i.e., a 1 st state in which the pipe holder 52 is closed, in which the semicircular pipe receiving portions 56 and the pipe receiving portions 58 face each other as indicated by solid lines in fig. 3 to form a substantially circular cross section and support the horizontal pipe 22, and a 2 nd state in which the pipe holder 52 is opened, in which the pipe receiving portions 58 are rotated about the hinge portions 54 to open the pipe holder 52 as indicated by two-dot chain lines in fig. 3, for example.

The pipe holder 52 can be fixed to the rod member 48 by disposing and clamping the clamping piece 56A and the clamping piece 58A between the pair of hexagonal nuts 50 screwed to the male screw 48A of the rod member 48. Further, the height position of the lateral tube 22 from the stepped floor 14A can be changed by changing the attachment position of the hexagonal nut 50 to the rod member 48.

As described above, the support member 32 of the present embodiment has a structure in which the lateral tube 22 can be easily held by opening and closing the pipe holder 52 in the vertical direction, and the height of the held lateral tube 22 can be easily adjusted by extending the rod member 48 in the vertical direction.

(construction Process)

Next, the construction process of the siphon drainage system 10 of the present embodiment will be described.

(1) The plurality of support members 32 are disposed on the upper surface of the step floor 14A at intervals along a drainage path (in other words, a disposition path of the cross pipes 22) from the through holes 62 formed in advance in the step floor 14A to the L-letter shaped piping member 20 on the downstream side of the water-using tool 16. Here, as an example, first, a hole 64 is bored in the stepped floor 14A, the anchor portion 46 is fixed to the stepped floor 14A by inserting the anchor portion 46 into the hole 64, and the male screw 48A on one end side of the rod member 48 is screwed into the female screw 46A of the anchor portion 46. The 1 st hexagon nut 50 is screwed to the male screw 48A of the rod member 48, and the portion of the rod member 48 on the upper side of the hexagon nut 50 is inserted into the through hole 60 formed in the clamping piece 56A and the through hole 60 formed in the clamping piece 58A of the pipe holder 52, thereby temporarily supporting the pipe holder 52 on the rod member 48. Further, the 1 st hexagon nut 50 may be screwed to the rod member 48 in advance.

(2) The vertical portion 26B of the downpipe 26 is inserted into the through hole 62 formed in the step floor 14A, the pipe holder 52 of the support member 32 disposed in the instrument box 24 is opened, the horizontal portion 26A is placed on the clamping piece 56A, the position of the hexagonal nut 50 is adjusted so that the horizontal portion 26A is at a preset height position (the same height as the horizontal portion 20B of the L-letter shaped pipe member 20 (the absolute height is not the height from the upper surface of the step floor 14A)), and then the pipe holder 52 is closed, the 2 nd hexagonal nut 50 is screwed to the rod member 48, and the clamping piece 56A and the clamping piece 58A are clamped by the two hexagonal nuts 50 (an example of a fixing step). Thereby, the downpipe 26 is fixed by the pipe holder 52, and the pipe holder 52 is fixed to the rod member 48.

(3) After the downspout 26 is fixed, the cement 66 is filled in the gap between the through hole 62 and the vertical portion 26B of the downspout 26 and cured (see fig. 1, an example of the cement curing step). The binder may be mortar, cement, or the like.

It is also preferable that the support member 32 for fixing the downpipe 26 is installed in the vicinity of the drop portion separated from the wall penetration portion. This is because the height of the portion separated from the wall penetrating portion needs to be adjusted, and thus the portion separated from the wall penetrating portion is supported to facilitate adjustment. The vicinity of the drop portion is a portion on the horizontal side of a portion where the downpipe 26 changes from horizontal to vertical.

(4) The cross pipe 22 is connected to the letter L-shaped piping member 20 and the downpipe 26, and at the remaining piping holder 52 except for fixing the downpipe 26, the lengthwise intermediate portion of the cross pipe 22 is placed on the clamping pieces 56A and the piping holder 52 is closed.

(5) The height position of each pipe holder 52 is adjusted by turning the hexagonal nut 50 of each rod member 48 with a wrench or the like so that the entire cross pipe 22 becomes horizontal.

(6) After the horizontal tube 22 is leveled, the 2 nd hexagon nut 50 is screwed to the rod member 48, and the two hexagon nuts 50 grip the gripping piece 56A and the gripping piece 58A of the pipe holder 52. In this way, the pipe holder 52 fixes the cross pipe 22 and the pipe holder 52 to the rod member 48 (an example of a step of holding the cross pipe horizontally).

(6) Surface finishing is smoothed by flowing finishing cement (also referred to as slag concrete) 68 to the upper surface of the step floor 14A (an example of a surface finishing process). The thickness of the cement 68 for dressing is preferably small, and is, for example, about 5mm to 10 mm. This enables the step floor 14A to be finished to have a good appearance. Similarly to the upper surface of the step floor 14A below the living room 15, the surface of the floor 14B may be smoothed by applying the finishing cement 68 to the upper surface of the floor 14B of the instrument box 24.

In the present embodiment, the floor 14B of the instrument box 24 and the step floor 14A below the living room 15 are continuously connected in the horizontal direction, but the floor 14B may be formed higher than the step floor 14A like the floor 14 (the portion other than the step floor 14A) of the living room 15.

In accordance with the above operation, the construction of the siphon drainage system 10 of the present embodiment is completed.

(action, Effect)

Depending on the room layout, the structure of the floor 14, the arrangement of other pipes, and the like, the cross pipes 22 may have to be arranged near the wall corners or the side surfaces of the stepped portion of the stepped floor 14A. In the vicinity of the side surface of the step portion of the floor slab 14 at the corner or the step floor 14A, the surface unevenness may be large.

However, by supporting the cross pipe 22 in a suspended manner from the step floor 14A by the support members 32 as in the present embodiment, the cross pipe 22 can be supported horizontally even when the step floor 14A is not flat.

Further, the height of the horizontal tube 22 can be easily adjusted by adjusting the height position of the hexagonal nut 50 using a wrench or the like, and the complicated work of adjusting the unevenness of the concrete step floor 14A is not necessary, and the work for constructing the piping can be simplified.

Further, in the support member 32 of the present embodiment, since the pipe holder 52 is disposed on one side of the lever member 48, even if another pipe 70 is disposed on the step floor 14A as shown in fig. 2, the pipe holder 52 can be disposed on the step side of the step floor 14A, and the cross pipe 22 can be disposed horizontally so as to avoid the other pipe 70 by being brought close to the side surface of the step floor 14A.

In addition, the floor 14 and the stepped portion of the stepped floor 14A are often liable to become uneven due to the difficulty of construction. When the piping must pass through such a portion, the conventional support member may be difficult to mount due to the positional relationship with the raised step, but the support member 32 of the present embodiment can be easily constructed even in such a case.

Although not shown, the horizontal tube 22 may be passed over another pipe 70 by extending each rod member 48 to raise the mounting position of the pipe holder 52 as a whole.

In addition, when the support member 32 is removed due to a change in the layout of the cross pipe 22 or the like, the lever member 48 may be removed from the anchor portion 46 by rotating the lever member 48 after the pipe retainer 52 is removed from the lever member 48. The lower portion of the rod member 48 is fixed by being partially buried in the cement 68 for trimming, but the length of the fixed portion between the rod member 48 and the cement 68 for trimming is short (for example, about 5mm to 10 mm), and the rod member 48 can be easily detached by turning the rod member 48.

The cement 68 for refurbishment after the removal of the rod member 48 leaves a hole having substantially the same diameter (for example, about 10 mm) as the rod member 48, but the hole can be easily filled with cement, mortar, a cement material, or the like. Further, the anchor portion 46 of the stepped floor 14A after the removal of the lever member 48 does not have to be removed intentionally, and there is no problem even in a state of remaining on the stepped floor 14A.

In the siphon drainage system 10 of the present embodiment, the drainage discharged from the water using tool 16 is merged into the drainage riser pipe 12 via the drainage trap 18, the L-shaped piping member 20, the siphon drainage pipe 21, and the merging joint 38.

When the drain water flows into the siphon drain pipe 21 from the water using equipment 16, the upstream side of the horizontal pipe 22 is filled with the drain water, and the drain water kept in the filled state flows downstream and flows into the vertical pipe 34. When the drain water that becomes full falls within the standpipe 34 under the force of gravity, a siphon force is created within the standpipe 34. Then, the drain water inside the horizontal pipe 22 is drawn by the siphon force toward the vertical pipe 34 and flows down, and the drain water is efficiently drained.

In the siphon drainage system 10 of the present embodiment, since the horizontal tubes 22 are arranged horizontally, the flow in the horizontal tubes can be made full flow more quickly than in the case where the horizontal tubes 22 are arranged obliquely, and the siphon suction force can be generated quickly.

(kitchen system)

In fig. 5, a drainage structure 110 according to the present embodiment is used to drain water from a part of a siphon drainage system 112, for example, a kitchen system 113.

The galley system 113 has a gas station 118, a dishwasher 121 as an example of a water-using appliance, and a sink 122 of a galley wash station as an example of another water-using appliance. The galley system 113 is a so-called L-shaped galley, the direction of the sink 122 being arranged at right angles to the direction of the gas station 118 and the dishwasher 121. In other words, the gas stand 118 and the dishwasher 121 are disposed along the wall 111, and the water tank 122 is disposed at a position separated from the wall 111. Thereby, the tub 122 and the dishwasher 121 are separated by a distance, compared to the case where the tub 122 and the dishwasher 121 are disposed adjacently.

As shown in fig. 6 (a), in each floor of the building 115, a dishwasher 121 and a sink 122 are provided on an upper side of a floor 124. Siphon drain system 112 has a drain stand pipe 114, a drain structure 110, and a standpipe 116.

The vertical drainage pipe 114 is disposed vertically in the building and penetrates through a through hole 125 of a floor slab 124 of the building 115. The vertical drain pipe 114 is provided with a drain joint 126 for connecting the vertical pipe 116.

The vertical pipe 116 is a pipe connected to the drain stand pipe 114 for flowing drain water from the cross pipe 128 downward, and has an upper end connected to a downstream end of the cross pipe 128. The lower end of the standpipe 116 is connected to a drain fitting 126. Accordingly, the drain water discharged from the water-using equipment such as the dishwasher 121 and the sink 122 and flowing into the standpipe 116 through the cross pipe 128 is configured to merge with the drain standpipe 114.

In the drawings, the structure of the connection portion of each pipe such as a pipe joint is appropriately omitted or simplified.

In fig. 6 (a), the drain structure 110 includes two dishwashers 121 as water-consuming devices, a water tank 122,

pipes

131 and 132, a horizontal pipe 128, and a water seal structure 134 as an air accumulation suppressing unit.

The

pipes

131 and 132 are connected to downstream sides of

drain elbows

141 and 142 provided in the dishwasher 121 and the water tub 122, respectively. Specifically, the pipe 131 is connected to the downstream side of the drain trap 141 provided in the dishwasher 121. The pipe 132 is connected to a downstream side of a drain elbow 142 provided in the water tank 122 and extends downward.

The

drain trap pipes

141 and 142 are so-called water-sealed trap pipes for preventing reverse flow of foul smell, gas, and the like. The drain trap 141 is built into the dishwasher 121, for example. The drain elbow 142 is, for example, an S-letter shaped elbow connected to the drain opening of the sink 122. The

drain trap pipes

141 and 142 may be of any form, and a cup-shaped trap pipe or the like may be used.

A vent valve 144 is attached to, for example, an upper end portion (above the pipe 132) of the drain trap 142. The vent valve 144 is a member for allowing air from the outside to pass through the drain trap 142 and preventing drain and air from passing through the drain trap 142 to the outside.

The cross pipe 128 is a pipe in which

pipes

131 and 132 are connected to the upstream end 128A, respectively, and which is used to flow the drain water flowing from the water-using equipment through the

pipes

131 and 132 in the lateral direction. Specifically, a downstream end of the pipe 131 and a downstream end of the pipe 132 are connected to the upstream end 128A of the cross pipe 128, respectively. In the example shown in fig. 6 (a), a connection portion 131A of the pipe 131 is connected to the vicinity of the downstream side of a connection portion 132A of the pipe 132 at an upstream end portion 128A of the horizontal pipe 128. As an example, the connection portion 131A is disposed below the pressure buffer portion 36 described later. It is desirable that the flow path length between the connecting

portions

131A, 132A of the upstream end 128A of the cross pipe 128 be as short as possible. This is because the shorter the flow path length, the more the formation of air pockets between the

connection portions

131A, 132A can be suppressed.

Further, the connection portion 131A of the pipe 131 may be disposed upstream of the connection portion 132A of the pipe 132. Although not shown, for example, the connection portion 131A of the pipe 131 may be connected to the upstream side of the connection portion 132A of the pipe 132 and to the downstream side of the pressure buffer portion 136, which will be described later.

The pipe 132 on the water tank 122 side is provided with a pressure buffer 136. The pressure buffer 136 is a member for relieving the pressure applied to the drain elbow 142 via the pipe 132. A bag (not shown) that communicates with the pipe 132 and can be elastically expanded and contracted is provided inside the pipe. The bag body is configured to elastically deform and swell when a positive pressure is received from the downstream end of the pipe 132, and can alleviate the pressure generated on the downstream side.

The water seal structure 134 is provided in the pipe 131 on the dishwasher 121 side, and suppresses air accumulation in the pipe 131. Here, the flow path length in the lateral direction from the drain trap 141 to the connection portion 131A to the cross pipe 128 of the pipe 131 is longer than the flow path length in the lateral direction from the drain trap 142 to the connection portion 132A to the cross pipe 128 of the pipe 132. Since the relatively long pipe 131 is likely to form an air pocket, the pipe 131 is provided with the water seal structure 134 to suppress the formation of the air pocket in the pipe 131.

The water seal structure 134 is configured such that the inside of the pipe 131 is filled with water when the water is not drained from the dishwasher 121. The water may be a residual of the drain water from the dishwasher 121 or may be water supplied from the outside into the pipe 131.

Specifically, the water seal structure 134 is configured such that the flow path passing through the pipe 131 first descends, then ascends, and descends again between the dishwasher 121 and the connection portion 131A. Here, a portion where the flow path descends obliquely downward from the drain trap 141 is referred to as a descending portion 134A, a portion where the flow path ascends is referred to as an ascending portion 134C, and a portion where the flow path descends again is referred to as a descending portion 134E. In the water seal structure 134, for example, a horizontal portion 134B is provided between a portion where the flow path of the pipe 131 first descends to a portion where the flow path thereof ascends again, that is, between the descending portion 134A and the ascending portion 134C. Thus, the water seal structure 134 is formed in a U-letter bent pipe shape. If the pipe 131 does not rise and then descends again, the descending portion 134E directly merges with the downstream pipe, and the pipe 131 merges with the pipe 132 on the water tank 122 side extending in the vertical direction, but in this case, the drain from the water tank 122 side easily flows into the pipe 131. In particular, when pressure fluctuation occurs in the pipe 131, the fluid is likely to flow in. By causing the piping 131 to merge with the horizontal pipe 128 from above by the re-descending portion 134E, the drain water from the horizontal pipe 128 does not flow into the piping 131, and the drain water from the water tank 122 side does not flow into the piping 131, so that the pressure fluctuation in the piping 131 on the dishwasher 21 side is less likely to occur.

Since the horizontal portion 134B is filled with water, when the connection portion 131A is brought close to the connection portion 132A and the range of the horizontal portion 134B is set large, the area in which air pools are formed in the pipe 131 can be reduced. Therefore, the connecting

portions

131A, 132A are disposed at the upstream end 128A of the cross tube 128.

Further, a horizontal portion 134D is also provided between the portion where the flow path rises and the portion where the flow path falls again, that is, between the rising portion 134C and the re-falling portion 134E. The horizontal portion 134D may be shortened or deleted so that the drain flows directly from the rising portion 134C to the further falling portion 134E. This can eliminate air in the pipe of the horizontal portion 134D.

As shown in fig. 6 (B), the horizontal portion 134B is disposed to overlap the cross tube 128 and extends along the cross tube 128. The horizontal portion 134B is disposed above the cross pipe 128 at an appropriate interval by a support member not shown. The pipe construction method of the siphon drainage system according to the present embodiment can be used not only for horizontally supporting the horizontal pipe 128 but also for horizontally supporting the horizontal portion 134B.

[ other embodiments ]

While one embodiment of the present invention has been described above, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

In the above embodiment, the example in which the support member 32 is attached to the step floor 14A has been described, but the support member 32 may be attached to a portion other than the step floor 14A. Further, in the support member 32 of the above-described embodiment, the rod member 48 is attached to the anchor portion 46, but the object to which the rod member 48 is attached is not limited to the anchor portion 46, and may be an object other than the anchor portion 46 as long as an internal thread is formed.

The support member 32 of the above embodiment supports the pipe holder 52 by 1 rod member 48, but may be configured to support the pipe holder 52 by two rod members 48 as shown in fig. 4.

In the above embodiment, the leg portion is constituted by the rod member 48 formed with the male screw 48A and the anchor portion 46 formed with the female screw 46A, but the leg portion may be constituted by the anchor portion formed with the male screw and the rod member formed with the female screw, in contrast thereto.

Examples of the water-using tool 16 include a washbasin, a washing machine, a kitchen sink, a bathtub, and a dishwasher, but the type thereof is not particularly limited as long as the water-using tool discharges water, and other devices may be used.

Claims

1. A piping construction method of a siphon drainage system including a horizontal pipe disposed along a floor surface for flowing drainage from a water using appliance, a downpipe connected to a downstream side in a drainage direction of the horizontal pipe and bent downward, and a vertical pipe connected to a downstream side of the downpipe and extending downward,

the piping construction method includes the steps of:

maintaining the horizontal pipe horizontal by supporting at least one pipe of the horizontal pipe and the downpipe from the ground using a buoyant member for suspending the at least one pipe;

a fixing step of fixing the horizontal portion of the downpipe to the floor in an instrument box provided outside the living room of the resident by the floating member by inserting the vertical portion of the downpipe or the vertical pipe through a hole formed in the floor in the instrument box;

a cement curing step of filling a vertical portion of the downpipe or a gap between the vertical pipe and the hole with a cement to cure the cement; and

a surface finishing step of performing surface finishing by allowing cement to flow onto the ground surface in the instrument box after the fixing step,

the support member is installed in the vicinity of a drop portion separated from the wall penetration portion, the vicinity of the drop portion being a portion on the horizontal side of a portion where the downpipe changes from horizontal to vertical.

2. The piping construction method of a siphon drainage system according to claim 1,

the floating member suspends the horizontal tube from the floor by a holding mechanism, and the holding mechanism includes at least 1 leg provided on the floor and a pipe holding portion provided on a side portion of one side of the leg and holding the horizontal tube.

3. The piping construction method of a siphon drainage system according to claim 2,

the height of the pipe holding portion from the floor surface can be adjusted by changing the connecting portion of the pipe holding portion to the leg portion.

4. The piping construction method of a siphon drainage system according to claim 2,

the leg portion has an anchor portion that is fixed to the ground by being buried therein, and a rod member having an external thread portion that is capable of being screwed into an internal thread portion of the anchor portion.

5. The piping construction method of a siphon drainage system according to claim 3,