JP2004225480A - Drain structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain structure capable of quickly substituting an air inside a drain with soil water when seal destruction occurring in a water seal trap is prevented and when drainage occurs in a drain fitting even if strong suction force acts on the inside of the drain with the flowing-down of the soil water in a siphon type drain. <P>SOLUTION: In the drain 6 including a drainage vertical pipe 1 of a small calibered pipe connected to the drain fitting 4, the water seal trap 2 is provided on a level below the lower end of the drainage vertical pipe 1 to which siphonage is applied. A drainage chamber 23 is provided on the uppermost stream side of the drain 6. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a drainage pipe structure capable of realizing smooth drainage by using the principle of a siphon and preventing an odor and insects from entering a room.
[0002]
[Prior art]
The drainage structure in a general building is configured by placing a water seal trap for each drainage device or in the middle of the drainage channel, and is configured to prevent the invasion of odors and pests from indoor sewage. ing. In addition, in order to maintain the function of the water seal trap, it is considered that the internal pressure of the drain pipe under natural flow should be close to the atmospheric pressure (avoid full water).
[0003]
Recently, drainage systems using the principle of siphon have been proposed (for example, see Patent Documents 1 to 4). This technology is designed to be able to suck the wastewater on the upstream side by the suction force generated behind the circulating wastewater when the wastewater flows down the drainage standing pipe constituting the pipeline in a full state, It is possible to realize smooth drainage and downsizing of the drain pipe to a diameter of about 15 mm to 40 mm.
[0004]
A siphon refers to a bent pipe used to raise a liquid once to a high place and transfer it to a low place.In the present invention described below, when the liquid falls in a substantially full state in the pipe, the siphon is upstream of the liquid. The principle of causing the suction action on the side is called "siphon principle", and the force generated by this siphon principle is called "suction force" or "siphon force".
[0005]
In the above drainage pipe structure, the drainage stack is constituted by a small-diameter pipe, so that when drainage occurs from a drainage device provided at the upstream end of the drainage stack, the drained drainage fills the drainage stack. As the water flows down in this state, a suction force is generated inside the drainage pipe at the upstream of the drainage. This suction force acts on the drainage and the drainage present in the drainage pipe downstream of the drainage, and allows these to flow smoothly.
[0006]
Since the drainage system using the siphon principle uses a small-diameter drainage pipe, the pipe space occupied by the drainage pipe can be reduced when the drainage pipe is housed inside a wall or under a floor. For this reason, there is an advantage that the internal space of the wall and the space under the floor can be effectively utilized. In addition, it is possible to allow a slight reverse gradient from the drainage device to the junction where it is sufficiently low, and use flexible pipes in addition to general piping materials represented by rigid PVC pipes. Becomes possible.
[0007]
In particular, when the drainage pipe is configured using a flexible pipe, piping can be performed without providing a seam between the drainage device and the junction, and the workability can be significantly improved. In addition, by using a flexible pipe, the flexible pipe can be passed through the inside of the sheath and piped, and when it is necessary to renew the pipe, it is possible to work without breaking walls, floors, and ceilings. There is also.
[0008]
As described above, in the drainage system using the siphon principle, since there is little restriction on the gradient, there is an advantage that obstacles on the piping route can be avoided and the drainage device after completion can be moved. These advantages are advantageous in considering building plans, building costs, and ease of use after building.
[0009]
[Patent Document 1]
JP-A-06-042019
[Patent Document 2]
JP-A-2000-07260
[Patent Document 3]
JP 2000-271406 A
[Patent Document 4]
JP-A-2002-121792.
[0010]
[Problems to be solved by the invention]
Even in the case of a drainage system using the principle of the siphon, it is necessary to provide a trap in order to prevent odor and pests of sewage from entering a room through drainage pipes and drainage equipment. As this trap, there is a so-called water seal trap or a mechanical trap that blocks the middle of the drainage path with water. For example, as shown in FIG. 10, a bathtub or a toilet provided at the upstream end of the drainage pipe 51 is used. It is common practice to provide a water seal trap 53 near the drain of the drainage device 52.
[0011]
However, the suction force generated when the drainage falls down the drainage stack in a full state acts on the inside of the pipe from the upstream side of the drainage to the drainage device. Is sucked to the downstream side, and a phenomenon called so-called unsealing in which no water remains remains. In this case, the function as a water seal trap is impaired, and there is a problem that odors may enter the room and pests may enter.
[0012]
In each of the above patent documents, a trap with a large leg cross-sectional area ratio is provided or a flow rate regulating valve is provided to reduce the flow rate and lengthen the drainage time as a measure against breakage. However, when a trap having a large leg cross-sectional area ratio is used, there is a problem that it is necessary to properly handle a drainage device, and when a flow rate control valve is provided, there is a problem that drainage time becomes long.
[0013]
Also, if the drain pipe is formed with a reverse slope, it is necessary to move the drainage drained from the drainage device to the top of the reverse slope once by some means before exerting the siphon force. Pumps are used or the height difference between the drainage device and the top of the reverse slope is used. In the former case, electric energy is required, and devices such as a motor and a pump, wiring, and the like are required.
[0014]
Further, when the height difference is used, since the drain pipe has a small diameter, it is not easy to replace the air staying in the drain pipe with the drain water to flow into the drain pipe. Residual drainage between the instrument and the highest point of the drainpipe may not be able to be pushed downstream. For example, as shown in FIG. 11A, the height H of the highest portion 54 is required for the drainage 55 between the highest portion 54 and the drainage device 52 in the drain pipe 51 to flow downstream. ₁ Need to get over. However, as shown in FIG. ₂ (H ₁ Is H ₂ Effluent 55 is directed toward the highest part 54 by H ₂ Although the water only rises, it equilibrates on the way, and continuous drainage cannot be realized. That is, as shown in FIG. 3C, when drainage occurs in the drainage device 52, it is necessary to quickly replace the air existing in the drainage pipe 51 with air.
[0015]
An object of the present invention is to provide a siphon-type drainage pipe in which a high suction force (siphon force) acts on the inside of the drainage pipe along with the flow of drainage without requiring special equipment. It is another object of the present invention to provide a drainage pipe structure in which the water seal trap does not break.
[0016]
Another object of the present invention is to provide a drainage pipe structure capable of quickly generating siphon force in a drainage pipe when drainage occurs from a drainage device.
[0017]
[Means for Solving the Problems]
In order to solve the above problems, a drainage pipe structure according to the present invention uses a small-diameter drainage pipe and drainage using the principle of a siphon having a drainage standpipe normally connected to a drainage device via a horizontal branch pipe. It has a pipe structure, in which a water seal trap is provided downstream from the lower end of the drainage stack on which the siphon force acts.
[0018]
In the present invention, there is no danger of breaking the water seal trap even if a large siphon force is generated when the drainage from the drainage device flows down the drainage stack in a full state. That is, while the drainage continues to the drainpipe, all the drainage passes through the water seal trap and does not break. Then, when the siphon power is weakened immediately before the drainage ends, since the water seal trap is provided downstream from the lower end of the drainage riser, the wastewater flowing out of the water seal trap is released to the atmosphere, No large suction force acts on the water seal trap.
[0019]
In particular, the height of the water ring trap provided downstream from the lower end of the drainage riser, which is opened to the atmosphere, is set so that the water is not drained by the siphon force generated at the tip of the water ring trap, The preferred range of this height is above the lower level of the water ring trap.
[0020]
For this reason, it is possible to secure the water sealing existing in the water sealing trap and prevent breakage. Further, even in the event of breakage, the drainage flowing along the wall of the drainage riser accumulates in the water seal trap, and the water seal of the water seal trap can be secured.
[0021]
Another drainage pipe structure is a drainage pipe structure using a small-diameter drainage pipe and utilizing the principle of a siphon having a drainage riser connected to a drainage device, wherein a water head is provided at the most upstream side of the small-diameter drainage pipe. A head pressure obtaining means for obtaining a pressure is provided.
[0022]
In the above drainage pipe structure, the accumulated drainage generates a head pressure by providing a head pressure acquiring means on the most upstream side of the small diameter drainage pipe. For this reason, prompt drainage can be realized regardless of the presence or absence of air inside the drainage pipe connected to the head pressure acquiring means.
[0023]
That is, even when the drain pipe has a reverse slope, drainage having the head pressure by the head pressure acquiring means quickly flows into the reverse slope part, and replaces or pushes out the air existing in the drain pipe. , It is possible to get over the reverse slope. The drainage passes through the reverse slope of the drainpipe, and when it reaches the drainpipe, a siphon effect is generated, so that the drainage officer on the upstream side can quickly drain.
[0024]
Further, another drainage pipe structure is a drainage pipe structure utilizing the principle of a siphon that uses a small-diameter drainage pipe and has a drainage riser connected to a drainage device. A water seal trap is provided downstream from the lower end, and a water head pressure acquiring means for obtaining a water head pressure is provided at the most upstream side of the small-diameter drain pipe.
[0025]
The drainage pipe structure can prevent the water seal trap from being breached, and can realize smooth and prompt drainage even when the drainage pipe has an inverse gradient.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the drain pipe structure according to the present invention will be described. The present invention relates to a drainage method of dropping a drain pipe in a full state by using a small-diameter drain pipe at the time of draining from a drainage device so as to exert siphon power. By providing a water seal trap downstream thereafter, it is configured to prevent breakage regardless of the action of the siphon force, thereby reliably blocking odor and preventing invasion of pests and the like indoors. .
[0027]
In addition, by providing a head pressure acquisition means upstream of the drain pipe, air existing upstream of the reverse slope part of the drain pipe is replaced with drainage despite the presence of a reverse slope part in a small-diameter drain pipe. Alternatively, the water can be pushed out by the drainage, and the drainage flowing into the reverse slope portion of the drainage pipe can be quickly passed, and the siphon effect can be surely generated to realize the quick drainage upstream of the reverse slope portion. It is like that.
[0028]
The diameter of the drainage pipe is not particularly limited, but is set to a value sufficiently smaller than the diameter of the conventional drainage pipe. That is, the drainage horizontal branch pipe and the drainage vertical main pipe in the conventional middle and low-rise houses generally use a pipe having a nominal diameter of about 100 mm, but in the present invention, a pipe having a nominal diameter of about 15 mm to 40 mm. Can be preferably adopted. A particularly desirable range of the pipe diameter is 15 mm to 25 mm.
[0029]
The drainage pipe used in the present invention does not limit the material and configuration of the pipe, and uses a rigid fixed-length straight pipe such as a PVC pipe or a metal pipe, or a flexible flexible pipe. It is possible to do.
[0030]
One drainage riser is connected to one drainage device. That is, in the piping structure according to the present invention, one drainage pipe is connected to each bathtub, washbasin, kitchen sink, or other drainage device, and a drainpipe is provided for each drainage pipe. The drainage pipe having the drainage riser is connected to a drainage basin at the end of the drainage riser and is opened to the atmosphere. Therefore, it is advantageous to connect the water seal trap to the drainage basin and to open the downstream end of the water seal trap in the drainage basin. By providing the water seal trap in this way, the installation place of the water seal trap can be shared with the drainage basin.
[0031]
The lower end of the drainpipe does not mean the lower end of the vertically disposed drainpipe, but the suction force acting on the drainage device located on the most upstream side of the vertically disposed drainpipe. Means a position that can secure a sufficient height to generate Therefore, the position of the water seal trap is lower than the position where the vertically disposed drain pipe can secure the height, and even if suction force due to drainage flowing out of the water seal trap acts, the water seal trap is closed. It is a level that can be secured.
[0032]
As described above, by setting the position of the water seal trap in the drainage riser, it is possible to secure the amount of water seal and prevent rupture even if any amount of wastewater flows. It becomes. As described above, the preferred location of the water seal trap in the drainage riser is at the lower end of the drainage riser and around the portion where the drainage pipe is connected to the drainage basin.
[0033]
The drainage pipe does not necessarily need to be formed by vertically standing the drainage pipe, but may be any one that is guided downward from above. That is, if it is possible to generate a siphon force sufficient to realize quick drainage by drainage flowing down the inside of the drainage stack, the drainage stack may not be installed vertically, and may be inclined. There is no problem.
[0034]
Therefore, even when the position of the drainage device installed indoors and the position of the drainage basin installed outdoors are misaligned, the drainage pipe is formed by inclining the drainage pipe and piping it inside the wall. It is possible. As described above, since a sufficient siphon force can be generated even if the drainage stack is not installed in a straight pipe and in a vertical direction, even when a flexible pipe is used for an indoor drainage pipe and a drainage stack, a siphon-type pipe is used. It is possible to construct a drainage system.
[0035]
The water seal trap provided below the drainage pipe has a function of water sealing the odor generated from the drainage basin to prevent entry into the room and also prevent pests from entering the room. The water seal trap is composed of a U-shaped pipe capable of constantly holding water having a height (water level) of about 50 mm or more. By providing the U-shaped pipe below the drainage pipe, the water seal trap is formed. A trap is formed so that a drain pipe between the water seal trap and the drainage device can be isolated from an outdoor drainage basin.
[0036]
By providing a water seal trap at the above position, when drainage flows down the drainage stack, the drainage passes through the water seal trap, the siphon power disappears, and the flow stops due to water flow resistance. Drainage remaining in the standing pipe (for example, drainage adhering to the pipe wall) flows in, and it is possible to secure water sealing in the water sealing trap.
[0037]
Conventionally, for example, when installing a bathtub embedded in concrete, a water seal trap is installed near the drainage basin where the water is discharged, or in cold regions, a water seal trap is placed underground to prevent freezing of the sealed water. However, in any of these cases, a siphon type drainage system is not adopted, but a natural flow type drainage system is adopted.
[0038]
Further, in the configuration of the present invention described above, since the extension distance of the drainage pipe including the drainage standpipe between the drainage device and the water seal trap increases, there is a concern that odor may be generated inside the drainage pipe. However, according to the knowledge of the present inventor, in the drainage using the siphon principle, since the flow velocity is higher than that in the gravity-flow drainage, dirt hardly adheres to the pipe, and the drain pipe has a small diameter. Compared with drain pipes, the surface area where dirt that generates foul odor is likely to adhere is small, and because the drain pipe is thin, the air inside the pipe upstream of the water seal trap is difficult to replace with indoor air. There is no risk of entering the room.
[0039]
The head pressure acquiring means provided on the most upstream side of the small-diameter drainage pipe in the present invention is configured such that when a reverse slope is generated in the drainage pipe, the head stays on the upstream side of the reverse slope part in the drainage pipe. It exerts a function of replacing the existing air with drainage, and applies a head pressure greater than the height of the reverse slope portion to the drainage drained from the drainage device to get over the reverse slope portion. In particular, when a flexible pipe is used as the drain pipe, the flexible pipe can easily form a reverse slope portion, so that this problem can be easily overcome.
[0040]
The head pressure greater than the height of the reverse slope part means a head pressure greater than the sum of the heights of the reverse slope parts present in the drainage pipe. That is, when there are a plurality of reverse slopes in the drainage pipe, the water head pressure is greater than the height obtained by adding the heights of the individual reverse slopes.
[0041]
As the head pressure acquiring means capable of exhibiting the above function, a drain chamber having a sufficient depth with respect to the height of the reverse slope portion assumed in the drain pipe and a sufficient thickness with respect to the diameter of the drain pipe, or drainage There is a ventilation means provided on the upstream side of the assumed reverse slope in the pipeline, and any of them can be used.
[0042]
In the case of the drain chamber, even if there are a plurality of reverse slope parts in the drain pipe, the depth only needs to be greater than the sum of these reverse slope parts, and this drain chamber may be provided at the drain outlet of the drainage device. .
[0043]
When a drain chamber is used as the head pressure acquiring means, it is preferable that the sectional area of the drain chamber is set sufficiently larger than the sectional area of the drain pipe. According to the knowledge of the present inventor, it was possible to realize reliable and quick replacement by setting the diameter of the drain chamber to about 1.5 times or more the diameter of the drain pipe.
[0044]
In addition, the depth of the drain chamber is set such that a water head pressure sufficiently larger than the height of the reverse slope portion assumed when the drain pipe is provided (when there are a plurality of reverse slope portions, the total height thereof) can be generated. With such a configuration, the drainage flowing into the drainage chamber from the drainage device can surely cross the reverse slope portion of the drainage pipe and exhibit the siphon effect.
[0045]
Next, a preferred embodiment of the drain pipe structure will be described with reference to the drawings. FIG. 1 is a diagram schematically illustrating a drainage pipe structure in which a water seal trap is provided at a level lower than the lower end of a drainage pipe. FIG. 2 is a view for explaining the relationship between the drainage riser and the water seal trap. FIG. 3 is a diagram of FIG. 2 as viewed from the front, and is a diagram illustrating an example of installation of a drainage riser. FIG. 4 is a diagram illustrating an example in which a plurality of drain pipes are connected to one water seal trap. FIG. 5 is a diagram schematically illustrating an example in which a drain chamber is provided as a water head pressure acquiring unit. FIG. 6 is a diagram illustrating a configuration of a drain chamber in a kitchen. FIG. 7 is a diagram illustrating a configuration example of a drainage chamber in a toilet fixture. FIG. 8 is a view in which ventilation means is provided to the drainage chamber. FIG. 9 is a view for explaining an example in which a drain chamber is provided at the most upstream side of the drain pipe and a water seal trap is provided at a level lower than the lower end of the drain pipe.
[0046]
1 to 3, a water seal trap 2 is provided downstream from the lower end of a drainage pipe 1 and an open end of the water seal trap 2 is opened to a drainage basin 3 buried underground. It is configured so that the discharged wastewater can be directly discharged to the drainage basin 3. A drainage device 4 such as a bathtub, a washbasin, or a kitchen sink is connected to the upstream end of the drainage riser 1. In addition, connecting pipes 5 from the drainage device 4 to the drainage riser 1 are arranged vertically and horizontally in a space inside a wall of a building or a space under the floor.
[0047]
The drainage riser 1 and the connecting pipe 5 from the drainage device 4 to the water seal trap 2 are substantially one. That is, a drainage pipe 6 composed of one connecting pipe 5 and drainage riser 1 is provided for each drainage device 4.
[0048]
When the drainage device 4 is installed on the second floor or the third floor, the drainage riser 1 is arranged in a space 7 a formed in the outer wall 7. The lower end of the drainage riser 1 is connected to an external pipe 9 guided to the drainage tub 3 after passing through the outer wall 7 at the upper end portion of the foundation 8 and exiting outside. Is provided with a water seal trap 2. In addition, 12 in the figure is a pipe in the premises.
[0049]
Also, in the case where the intended drainage device 4 is arranged on the first floor, for example, as shown in FIGS. The reverse slope portion 20 functions as the water seal trap 2. That is, when the pipe downstream of the reverse slope portion 20 passes under the floor in a substantially horizontal state, and then penetrates through the foundation and the head to the drainage basin 3 is small, the drainage chambers 23 and 21 apply a driving force to drainage. It will function as a drainage stack.
[0050]
As described above, even when the drainage device 4 is installed on the first floor, or when it is installed on two or more floors, the water seal trap 2 is provided downstream of the drainage stack 1. Become.
[0051]
Further, the drainage stack 1 does not necessarily need to be installed in the vertical direction in the space 7a in the wall, and when drainage falls down the drainage stack 1, sufficient drainage upstream of the drainage is sucked. What is necessary is just to be able to generate a siphon force. That is, the drainage riser 1 installed in the vertical direction shown in the center of FIG. 3 and the drainage riser 1 bent with a relatively strong curve shown on the right and left sides in FIG. It is possible to apply a sufficient suction force to the drainage device 4 connected to the drainage device.
[0052]
The connecting pipe 5 is a pipe connecting the drainage device 4 and the upper end of the drainage riser 1, and is appropriately formed depending on the installation position and height of the drainage device 4. With this connecting pipe 5, it is possible to freely install the underfloor space 10 for each floor without using a configuration that actively exerts the siphon effect.
[0053]
The pipe material constituting the drainage riser 1 and the connecting pipe 5 may be a straight pipe such as a PVC pipe or a steel pipe, but in this embodiment, a long synthetic resin pipe having flexibility is used. The resin pipe is cut and used by setting its length according to a preset route from the drainage device 4 to the drainage basin 1. For this reason, the path from the drainage device 4 to the water seal trap 2 can be formed by a single drainage pipe 6, and even if there is a bent portion in the middle, a joint such as an elbow is not required, and piping can be performed. It is possible to reduce the resistance and eliminate the possibility that the dirt is caught.
[0054]
Further, in this embodiment, a flexible synthetic resin pipe is inserted into the inside of the sheath 11 fixed to a column or a beam at a predetermined position while being installed along a preset pipe route, and a drain pipe 6 is formed. The pod construction method is adopted.
[0055]
In the above configuration, the diameter of the synthetic resin pipe constituting the drain pipe 6 capable of exerting a sufficient siphon force may be about 20 mm. The outer diameter of the sheath for accommodating the synthetic resin tube is about 40 mm.
[0056]
In the above drain pipe structure, the drainage flowing from the drainage device 4 can apply a suction force to the upstream side when falling down the drainage riser 1, and the drainage in the drainage device 4 can be performed by the action of the suction force. It is possible to actively suck and drain. When the wastewater flowing through the drainage pipe 6 reaches the water seal trap 2, the wastewater passes through the water seal trap 2 in a full state and is opened to the drainage basin 3. Then, it merges with another drainage basin 3 through the drainage pipe 12 connected to the drainage basin 3.
[0057]
FIG. 4 shows an example in which a plurality of drain pipes 6 are concentrated on one water seal trap 2. In this case, the water seal trap 2 is not a trap formed of a U-shaped pipe, but is configured such that the end of the drain pipe 6 is inserted into a bowl in which water is stored so as to have a depth capable of exhibiting a function as a trap. . In this case, even if the package is broken, the sealed water is restored by using any one of the connected drainage devices, so that it can be stored immediately.
[0058]
Next, an example in which a drainage chamber 23 serving as a water head pressure acquiring means is provided at the most upstream portion of the drainage pipe 6 having the reverse slope portion 20 will be described with reference to FIGS.
[0059]
In the figure, a drain chamber 23 is provided at the drain port of the drainage device 4 which is the most upstream part of the drain pipe 6 and has a depth equal to the height of the reverse slope part 20 (a plurality of reverse slope parts are present). In this case, the sum is set to be larger than the sum of the heights of the respective reverse slope portions and the water seal trap. For example, when the height of the reverse slope portion existing in the drain pipe 6 is 120 mm, the depth of the drain chamber 23 may be 120 mm or more, but is set to a sufficient depth of 300 mm or more.
[0060]
The cross-sectional area of the drain chamber 23 is set to be about 1.5 times or more the cross-sectional area of a pipe (a flexible synthetic resin pipe) constituting the drain pipe 6. In this embodiment, the diameter of the drain pipe 6 is set to 20 mm, and the diameter of the drain chamber 23 is set to 50 mm. However, the drainage chamber 23 is not limited to the above diameter, and can be selectively used in a range of about 40 mm to 75 mm.
[0061]
In the drainage pipe 6 configured as described above, the drainage drained from the drainage device 4 accumulates in the drainage chamber 23, and a head pressure corresponding to the accumulated depth is generated. Therefore, even when air and water are alternately present in the drain pipe 6 due to the reverse gradient, the head pressure of the drainage collected in the drain chamber 23 is a value larger than the height of the reverse gradient portion 20 in the drain pipe 6. When it becomes, it flows into the drain pipe 6 from the drain chamber 23 and flows over the reverse slope part 20 at a stretch and flows downstream. For this reason, the inside of the drainage pipe 6 is filled with water, a siphon force is generated, and thereafter, drainage continues until there is no more water remaining in the drainage device 4.
[0062]
FIG. 7 is a diagram illustrating an example in which a drainage chamber 23 is provided at a drainage port of a wash bowl as the drainage device 4. FIG. 2A shows a pocket 24 a formed at a connection portion between the drainage device 4 and the drainage chamber 23, and the pocket 24 a and the overflow port 24 b of the basin 4 are connected. In this configuration, when drainage occurs from the drainage device 4, the pocket 24 a and the overflow port 24 b function as a discharge passage for air existing in the drainage chamber 23. For this reason, even when the entrance of the drainage chamber 23 is small, the air in the drainage chamber 23 can be efficiently expelled, and the required head pressure can be quickly obtained. By the way, when there is no drain chamber, if the siphon power is strong, the drain and the air entering from the overflow port alternately flow as shown in FIG. 12 (a) to generate noise, and the drain time is long.
[0063]
FIG. 7B shows a configuration in which a drainage chamber 23 is provided at a drainage port of the drainage device 4 as a wash bowl, and a barrier tube 25 for preventing generation of a vortex is disposed in the drainage chamber 23. In this case, even if the water is drained from the drainage device 4, as shown in FIG. 12B, no vortex is generated in the drain outlet, and the air that weakens the siphon force is not entrained in the draining water that flows down. Therefore, it is possible to continuously exert a strong siphon effect until drainage is exhausted.
[0064]
FIG. 8 shows an example in which a vent pipe 26 is provided in the drain chamber 21. The vent pipe 26 is open to the atmosphere with its end positioned higher than the upper surface of the drainage device 4. If the ventilation pipe 26 is not provided, the drainage accumulated in the drainage device 4 and the drainage accumulated in the drainage device 4 due to the existence of the air between the drainage and the drainage device 4 increase the height of the reverse slope portion. Unless the water level exceeds the level, it can hardly move downstream. That is, it cannot be drained.
[0065]
However, in the drainage pipe structure configured as shown in FIG. 8, the air existing between the drainage tool 4 and the reverse slope 20 can move to the atmosphere via the ventilation pipe 26, Can flow into the drain chamber 21 and generate a water head pressure in the drain chamber 21, so that it can flow over the reverse slope portion 20 at a stretch and flow downstream, and in this process, exerts a siphon effect and is more effective than the reverse slope portion 20. It becomes possible to apply a suction force to the upstream side. This suction force acts on the drainage device 4, and when the drainage is retained in the drainage device 4, the retained drainage can be sucked and drained quickly.
[0066]
FIG. 9 shows that the drainage chamber 23 is provided on the most upstream side of the drainage pipe 6 and the water seal trap 2 is provided at a level lower than the lower end of the drainage pipe 1 to prevent the water seal trap from being breached. It is a figure explaining a drainage pipe structure which can realize quick drainage even when there is a gradient.
[0067]
In this figure, when the connection portion of the drain pipe 6 to the drain chamber 23 is located at the side surface 23b separated from the bottom portion 23a, the waste water drained from the drain device 4 contains a substance having a specific gravity larger than water. It is also possible to precipitate this substance at the bottom 23a of the drain chamber 23.
[0068]
【The invention's effect】
Although the drainage method using a siphon has various advantages as described in the section of "Background Art" at the beginning, it has a disadvantage that the siphon is used to easily break the package. Also, once the siphon force is generated, drainage can be performed even if there is a reverse slope. There was also a drawback that the drainage did not start because it was not replaced. However, in the drainage pipe structure according to the present invention, since the water seal trap is provided downstream from the lower end of the drainage stack, a large siphon force is generated when the drainage from the drainage equipment flows down the drainage stack in a full state. Even so, there is no danger of breaking. For this reason, the odor can be blocked and the invasion of the pests can be reliably prevented.
[0069]
Further, in another drainage pipe structure, by providing a head pressure acquiring means on the most upstream side of the small-diameter drainage pipe, even if the drainage pipe has a reverse slope, this air is replaced with drainage. The drainage flows quickly and can get over the reverse slope. For this reason, it is possible to realize a quick drainage by applying a suction force to the drainage pipe on the upstream side of the drainage.
[0070]
Further, in another drainage pipe structure, it is possible to prevent the water seal trap from being breached, and to realize smooth and prompt drainage even when the drainage pipe has a reverse slope.
[Brief description of the drawings]
FIG. 1 is a diagram schematically illustrating a drainage pipe structure in which a water seal trap is provided at a level lower than a lower end of a drainage pipe.
FIG. 2 is a diagram illustrating a relationship between a drainage pipe and a water seal trap.
FIG. 3 is a diagram of FIG. 2 as viewed from the front, and is a diagram illustrating an example of installation of a drainage pipe.
FIG. 4 is a diagram illustrating an example in which a plurality of drain pipes are connected to one water seal trap.
FIG. 5 is a diagram schematically illustrating an example in which a drain chamber is provided as a water head pressure acquiring unit.
FIG. 6 is a diagram illustrating a configuration of a drain chamber in a kitchen.
FIG. 7 is a diagram illustrating a configuration example of a drainage chamber in a toilet fixture.
FIG. 8 is a diagram in which ventilation means is provided to a drain chamber.
FIG. 9 is a diagram illustrating an example in which a drain chamber is provided at the most upstream side of the drain pipe and a water seal trap is provided at a level lower than the lower end of the drain pipe.
FIG. 10 is a diagram illustrating a drain pipe structure provided with a water seal trap near an upstream end of the drain pipe.
FIG. 11 is a diagram illustrating a problem when a reverse slope is present in a drain pipe.
FIG. 12 is a diagram illustrating a problem when draining water from a washbasin.
[Explanation of symbols]
1 Drainage standpipe
2 Water seal trap
3 drainage basin
4 drainage equipment
5 Connecting piping
6 drainage pipe
7 Outer wall
7a Wall space
8 Basics
9 External piping
10 Under the floor
11 sheath tube
20 Reverse slope
21 Drainage chamber
23 Drainage chamber
23a bottom
23b side
24a pocket
24b overflow port
25 Barrier tube
26 Vent pipe

Claims (3)

A drain pipe structure using a small-diameter drain pipe and a siphon principle having a drain pipe connected to a drainage device, wherein a water seal trap is provided downstream from the lower end of the drain pipe on which siphon force acts. Drainage pipe structure characterized by being provided. A drainage pipe structure utilizing a siphon principle having a drainage pipe connected to a drainage device using a small-diameter drainage pipe, and obtaining a head pressure for obtaining a head pressure at the most upstream side of the small-diameter drainage pipe. A drainage pipe structure comprising means. A drain pipe structure comprising the drain pipe structure according to claim 1 and the drain pipe structure according to claim 2.

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