JP2006037455A - Drain structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly and surely drain water, in a siphon type drain system. <P>SOLUTION: This drain structure uses the action of a siphon having a vertical drain pipe connected to a drain apparatus, by using a small diameter drain pipe; and is characterized by arranging a water sealing trap on the downstream side on and after the lower end of the vertical drain pipe for exhibiting suction force. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drainage structure that realizes smooth drainage using the action of a siphon.

  Currently, the most common indoor drainage system in buildings uses drainage pipes with a diameter of 50 mm to 150 mm. The drainage is free-falling to move the drainage vertically, and the drainage pipe is used to move the drainage in a substantially horizontal direction. A gradient is used. The gradient for moving in a substantially horizontal direction is about 1/50 to 1/200. Hereinafter, in the present invention, this is referred to as a natural flow drainage system.

  Usually, in a drainage system, it is necessary to provide a trap that prevents sewage odors, pests, and the like from entering the indoors through drainage pipes and drainage equipment. As a trap, there is a mechanical trap that opens only when drainage passes, but a so-called water-sealed trap that blocks the middle of the drainage path with water (sealed water) is most popular because it is inexpensive and has few failures. With some exceptions, water seal traps are provided near the drains of drainage devices such as sinks, vanities, unit baths and toilets, and drain pipes are connected to the outlets of the water seal traps. The

  In order to maintain the function of the water-sealed trap, it is required to keep the pressure inside the drain pipe as atmospheric as possible and to prevent the sealed water from flowing out. For this reason, in a natural-flow drainage system, a vent pipe that communicates with the atmosphere is provided, or a drain pipe that is sufficiently thick so that the pressure in the pipe from the upstream to the downstream can be maintained continuously. ing.

  On the other hand, recently, a drainage system using the action of a siphon has been proposed (see, for example, Patent Documents 1 to 4), and has a merit not found in a natural flow-down drainage system, as will be described later. Hereinafter, in the present invention, this is referred to as a siphon drainage system.

  A siphon is a bent pipe that is used to raise a liquid to a high place and move it to a low place. In the present invention, when the liquid falls in a substantially full state in the pipe, the liquid is sucked to the upstream side of the liquid. The action causing the action is referred to as “siphon action”, and the force generated by the siphon action is referred to as “suction force”.

  In the siphon drainage system, the drainage stand is configured by a small-diameter pipe, and when drainage is generated from the drainage device on the upstream side of the drainage standpipe, the drainage flows down in the drainage stand in a substantially full state. Then, in the upper part of the drainage standpipe, the volume of the drained wastewater becomes negative pressure, and the suction action is exerted upstream of the drainage standpipe. As a result, the subsequent drainage in the drainage apparatus moves to the upper part of the drainage standpipe, and flows down the drainage standpipe to create a negative pressure in the upper part of the drainage standpipe. Therefore, the suction action is continuously generated until the drainage device has no drainage, and the drainage can flow smoothly.

Note that the drainage stand here does not have to be completely vertical, but may be any angle that generates the suction force.

  Since the siphon drainage system uses a small-diameter drainage pipe, the pipe space occupied by the drainage pipe can be reduced. For this reason, there exists an advantage that the internal space of a wall and an underfloor space can be utilized effectively.

  Here, the diameter of the drain pipe is not particularly limited as long as substantially full water can be achieved, but is set to a sufficiently small value as compared with the diameter of the natural flow drainage system. That is, the drainage horizontal branch pipe and drainage main pipe of a natural flow drainage system usually use a pipe with a diameter of about 50 mm to 150 mm, but the siphon type drainage system has a pipe with a diameter of about 15 mm to 30 mm. Is preferably employed, and a particularly desirable aperture range is 15 mm to 25 mm.

  The siphon drainage system uses the suction force of the siphon action rather than the pipe gradient for the lateral movement of the drainage, so there is a slight reverse between the drainage device and the atmospheric pressure part at a sufficiently low position. It is possible to allow a gradient, and it is possible to use a flexible pipe in addition to a rigid pipe material typified by a hard PVC pipe or the like.

  When the drainage pipe is configured using a flexible pipe, it is possible to perform piping without connecting the pipe between the drainage device and the joining portion, and the workability can be greatly improved. In addition, by using a flexible tube, the flexible tube can be routed through the inside of the sheath tube, and when there is a need for renewal, work can be done without breaking the walls, floor, and ceiling. There is also an advantage. Furthermore, the bent portion of the flexible tube has a smaller pipe resistance than a joint such as an elbow used for a rigid tube, and it is possible to eliminate the possibility of foreign matter being caught.

  As mentioned above, in the drainage system using the siphon principle, the restriction of the gradient and the piping space are small, so it is easy to avoid obstacles on the piping route and move the drainage equipment after completion. It is possible to use a flexible tube that has advantages in renewal and the like. These advantages are advantageous in considering the construction plan, construction cost, and ease of use after construction.

Japanese Patent Laid-Open No. 06-042019 JP 2000-074260 A JP 2001-271406 A JP 2002-121792 A

  Even with siphon drainage systems, traps are necessary to prevent sewage odors and pests from entering the house, but if cost and resistance to failure are considered, A trap is desirable. However, the suction force that is generated when drainage falls in the drainage stand in a substantially full state acts on the inside of the pipe from the upstream side of the drainage to the drainage device, and the sealing water of the water seal trap is also downstream. A phenomenon called so-called breakage in which the sealed water does not remain after being sucked into the water occurs.

  This will be described with reference to the drawings. FIG. 1A shows an example of a siphon drainage system, in which 52 is a drainage device, 53 is a water seal trap, and 100 is a drainage pipe. 51 is a small-diameter drain pipe. When drainage falls down the standpipe 100, the inside of the standpipe is easily filled with water because of its small diameter, and when the drainage moves down, a suction force is generated by the action of the siphon as described above, and the drainage in the drainage device is sucked ( FIG. 1 (b)). And even when the drainage in the drainage device 52 is exhausted, the drainage is falling in the vertical pipe 100, so the suction force continues to be generated in the upper part of the vertical pipe and the trapped water of the trap 53 is sucked. (FIG. 1C) occurs. As a result, the function as a water-sealed trap is impaired, and there is a problem that odors and pests may enter the room.

  In each of the above-mentioned patent documents, a trap having a large leg cross-sectional area ratio is provided as a countermeasure against breakage, or a flow rate adjusting valve is provided to restrict the flow rate. However, when a trap with a large leg cross-sectional area ratio is used, there is a problem that it is necessary to properly handle the drainage device, and when a flow control valve is provided, there is a problem that the drainage time becomes long. .

  Further, in the siphon drainage system, once the pipe is filled with drainage, drainage continues without any trouble even if there is a reverse slope in part. However, if the previous drainage remains on the reverse slope, the siphon action may not start and the drainage may not flow well.

  For example, as shown in FIG. 2 (a), in order for the drainage 55 between the highest part 54 of the reverse slope portion in the drainage pipe 51 and the drainage device 52 to flow downstream, the height H1 of the highest part 54 is shown. It is necessary to get over. However, since the drain pipe has a small diameter, drainage and air are not easily replaced in the pipe. Therefore, if the head pressure generated in the drainage device 52 is H2, and H2 is smaller than H1, the drainage 55 rises by H2 toward the highest part 54 as shown in FIG. In this case, continuous drainage cannot be realized. Therefore, as shown in FIG. 5C, when drainage occurs in the drainage device 52, the air in the drainage pipe and the drainage are replaced little by little, the drainage pipe is filled with drainage, and the siphon action is overcome by overcoming the reverse gradient. I had to wait for it to be demonstrated.

  In Patent Document 2, a pump that is driven by power is required as means for pushing the drainage to the top of the reverse gradient, and in other Patent Documents, the above-described drainage failure due to residual water is not considered.

  Furthermore, in the siphon drainage system, the suction force causes air to be sucked into the drainage port together with the drainage, and the flow of the drainage and air in the drainage pipe is greatly disturbed, which may become a noise source. As described above, the fact that the flexible drain pipe can be used in the siphon drainage system is an advantage of improving the workability. However, if a sound insulation measure is to be taken after the pipe construction, the bent flexible drain pipe is difficult to wind because of the sound insulation material, and there is a possibility that the above-mentioned merit may be spoiled due to poor workability.

  The first object of the present invention is that in the siphon-type drainage system, even if a high suction force acts on the inside of the drainage pipe as the drainage flows without requiring special equipment, An object of the present invention is to provide a drainage structure in which a sealing trap does not break.

  The second object of the present invention is to provide a drainage structure that can quickly generate a suction force in the drainage pipe when drainage occurs from the drainage device.

  A third object of the present invention is to provide a drainage structure that prevents drainage noise in the drainage pipe due to the suction force of the siphon while maintaining improvement in workability by using a flexible drainage pipe.

  A first drainage structure according to the present invention for solving the above-described problem is a drainage structure that uses a siphon having a drainage stand connected to a drainage device using a small-diameter drainage pipe, and has a suction The drainage structure is characterized in that a water seal trap is provided downstream from the lower end of the drainage standpipe that exerts power.

  A second drainage structure according to the present invention for solving the second problem is a drainage structure that uses a siphon having a drainage standpipe connected to a drainage device using a small-diameter drainage pipe. The drainage structure is characterized in that a head pressure acquisition means for obtaining head pressure is provided on the most upstream side of the small-diameter drain pipe.

  A third drainage structure according to the present invention for solving the above third problem is a drainage structure that utilizes the action of a siphon that uses a small-diameter drainage pipe and has a drainage stand connected to a drainage device. The drainage pipe is a drainage structure characterized in that it is a flexible pipe integrally formed with a pipe line material, a vibration absorbing material outside the pipe line material, and a sound insulation material outside the vibration absorbing material.

  Moreover, the 4th drainage structure which concerns on this invention is a drainage structure provided with two or more drainage structures as described in Claims 1-3.

  The effect about the 1st drainage structure is explained. FIG. 3 is a diagram schematically showing the first drainage structure. Unlike FIG. 1, a water seal trap 2 is provided downstream of the drainage stand 1.

  In the above drainage structure, the drainage flowing from the drainage device 4 causes a suction force to act on the upstream side when the drainage stand 1 falls, and the suction force positively sucks the drainage in the drainage device 4 by the action of this suction force. Drain. And when the waste water which distribute | circulated the drain pipe 6 arrives at the water seal trap 2, this waste water will pass the water seal trap 2 in a full state, and will be open | released by the drainage trough etc. which are atmospheric pressure. When the drainage of the drainage device 4 is exhausted, the drainage pipe 6 filled with drainage gradually becomes empty from the upstream, but as the drainage stand 1 becomes empty, the driving force due to the siphon action is gradually lost. Due to the resistance to water flow, the water-sealed trap 2 is stopped while leaving the drainage to be sealed water.

  In addition, in FIG. 3, even if the flow rate of the drainage is large with respect to the resistance to water flow, even if a part of the drainage that should become sealed water flows out and the seal is broken, It is possible for the waste water adhering to the upstream 2 pipe wall to gradually flow in and recover the amount of water sealed in the water-sealed trap. The flow rate of the drainage that affects the sealing water loss is faster as the head of the drainage is larger. At this time, the drainage pipe 6 is also longer, so that the amount of drainage is also increased when it flows down after adhering to the pipe wall.

  Therefore, according to the configuration of the present invention, it is possible to prevent breakage regardless of the magnitude of the suction force due to the action of the siphon, and to surely prevent odor blocking and invasion of harmful insects and the like into the room.

  In addition, “providing a water seal trap downstream of the lower end of the drainage stand that exhibits suction” of the first drainage structure means “providing a drainage stand that acts on the suction downstream of the water seal trap” The drainage vertical pipe that should not be provided downstream of the water-sealed trap is a vertical pipe having a vertical difference from the depth of the water-sealed trap 2.

  The effect about the 2nd drainage structure is explained. In the drainage structure, the drainage accumulated in the head pressure acquisition means generates head pressure. For this reason, even if there is a reverse slope in the drain pipe and a part of the drainage remains here, the drainage quickly flows from the head pressure acquisition means to the drain pipe due to the head pressure, and the residual drainage in the drain pipe At the same time, it can be pushed downstream to get over the reverse gradient portion. When drainage passes through the reverse slope part and reaches the drainage standpipe, a siphon effect is produced, and rapid drainage of the upstream drainage pipe can be realized.

  The above will be described with reference to the drawings. In FIG. 4A, a drain chamber 23 as a head pressure acquisition means is provided at the drain port of the drainage device 4, and a drain pipe 6 is connected to the bottom thereof. The depth H3 of the drain chamber 23 is the height H1 of the reverse gradient portion 20 (if there are multiple reverse gradient portions in the drain pipe 6, H1 is the sum of the heights of the respective reverse gradient portions. , Including a water-sealed trap).

  As described with reference to FIG. 2, the drainage hardly flows into the small-diameter drainage pipe, but easily flows into the drainage chamber 23 having a thickness that allows easy replacement of air and drainage. For this reason, the drainage flowed to the drainage device 4 immediately accumulates in the drainage chamber 23 to form a water head H4.

  If the amount of drainage is sufficiently large, the water head H4 formed in the drainage chamber 23 exceeds the water head H1 necessary for pushing the wastewater and air accumulated in the reverse gradient downstream (FIG. 4 (b)). The drainage of the drainage chamber 23 can flow into the drainage pipe 6 at once (FIG. 4C). When the drainage reaches the vertical pipe 1 over the reverse slope and flows down, suction force is generated by the action of the siphon, and smooth drainage is started.

  When the amount of drainage flowed to the drainage device 4 is small (H4 <H1), the drainage and air accumulated in the reverse gradient cannot be pushed in, and the air and drainage are gradually replaced and flow into the drain pipe 6 (FIG. 4 (d)). However, unlike FIG. 2 (b) in which there is no drainage chamber and the wastewater stays temporarily in the drainage device 4, in FIG. This is the same as having completed draining in a short time. Thus, the drainage chamber also serves as a temporary storage of drainage.

  The function of temporarily storing the drainage can be used when the distance between the drainage device and the standpipe for siphon action is long and a time lag from the start of drainage to the generation of suction force occurs.

  The effect about the 3rd drainage structure is explained. With this structure, it is not necessary to perform troublesome sound insulation work for flexible pipes after the end of piping, and it is possible to reduce the construction time and cost associated therewith.

  Furthermore, there was a product with a sound insulation material wrapped around a straight pipe for use in a natural flow drainage system, but there is a gap in the sound insulation material at the boundary between the straight pipe and the joint. It was necessary to close the gap during piping work. However, according to the present invention, since the sound insulation measures are taken over the entire length of the drain pipe, it is possible to save time and effort for clearance processing.

  The effect about the 4th drainage structure is explained. As a result, the optimum siphon drainage system required by the designer can be provided.

  Preferred embodiments of the invention will be described below with reference to the drawings.

  FIG. 5 is a detailed cross-sectional view of the first floor portion of the building according to the embodiment of the first drainage structure, and FIG. 6 is an elevation view of FIG. 5 viewed from the front.

  The drainage standpipe 1 is disposed in an inner space 7a formed in the outer wall 7, and a drainage device such as a bathtub, a wash bowl or a kitchen sink (not shown) is connected to the upstream end of the drainage standpipe 1 via a connecting pipe 5. ing. Further, the lower end of the drainage vertical pipe 1 is connected to an external pipe 9 that is led to the drainage basin 3 after passing through the outer wall 7 at the upper end portion of the foundation 8 and going outside. A water seal trap 2 is provided in 3. In the figure, 12 is underground piping in the site.

  Here, the pipe material constituting the drain pipe 6 composed of the connecting pipe 5 and the drainage vertical pipe 1 may be a straight pipe such as a vinyl chloride pipe or a steel pipe, but in this embodiment, it is a long and flexible composite. A resin pipe is used, and the synthetic resin pipe is cut into a predetermined length and used according to a preset route from the drainage device 4 to the external pipe 9. For this reason, the path from the drainage device 4 to the external pipe 9 can be formed by one drain pipe 6, and even if there is a bent part in the middle, a joint such as an elbow is not required, and the pipe resistance It is possible to reduce the risk of foreign objects being caught.

  Moreover, the diameter of the drain pipe 6 is 20 mm, and taking advantage of its flexible characteristic, it is housed in the sheath pipe 11 having an outer diameter of 40 mm to facilitate the renewal of the pipe material 61.

  The connecting pipe 5 is a pipe connecting the drainage device and the upper end of the drainage vertical pipe 1, and obstructs an obstacle (for example, the beam 10 of the frame under the floor or the beam 10 of the foundation) according to the installation position and height of the drainage device. It is a piping made appropriately while avoiding. This connecting pipe 5 does not have a configuration that actively exerts a siphon effect, and does not require a drainage gradient of 1/50 to 1/200 that is required in a natural flow drainage system. Furthermore, if the water head pressure acquisition means (drainage chamber) which is the 2nd drainage structure which concerns on this invention is provided, the connecting pipe 5 can also make a reverse gradient.

  The drainage stand 1 does not necessarily need to be installed in the vertical direction in the wall space 7a, and when the drainage falls down the drainage stand 1, the suction is sufficient to suck the drainage upstream of the drainage. It only needs to be able to generate force. That is, any of the drainage stand 1 installed in the vertical direction shown in the center of FIG. 3 and the drainage stand 1 bent with a relatively strong curve shown on the right side and the left side of FIG. A sufficient suction force can be applied to the drainage device 4 connected to the. For this reason, when the position of the drainage device installed indoors and the location of the drainage drain installed outdoors are slightly shifted, it is possible to incline the drainage standpipe that generates suction force and place it inside the wall. It is.

  As described above, since the water seal trap 2 is provided downstream from the lower end of the drainage vertical pipe 1 on which the suction force acts, as described above, the suction force generated in the drainage vertical pipe 1 It does not reach the sealed trap 2 and is difficult to break. Furthermore, since the waste water adhering to the inner surface of the drain pipe 6 gradually flows down to the water seal trap 2 after the siphon is finished and refills the seal water, the function of the water seal trap 2 is maintained.

  And one of the preferable installation positions of a water seal trap is the inside of the drainage basin 3 as shown in FIG. This is because the installation space for the water seal trap is shared with the drainage basin, so that the installation space can be reduced and the maintenance of the water seal trap can be easily performed by opening the lid of the drainage basin.

  By the way, there has been a case where a water-sealed trap has been installed in or near a drainage basin. For example, when installing a bathtub embedded in concrete, install a water-sealed trap inside the drainage basin that is the discharge destination, or embed a water-sealed trap underground to prevent freezing of the sealed water in cold regions. There was a thing.

  However, these are similar to the embodiment of the present invention, but for the purpose of construction and anti-freezing, a water-sealed trap is installed in or near the drainage basin, and a natural downflow drainage system is adopted. Therefore, it does not include the “drainage standpipe that exerts suction”, which is a condition of the present invention. Of course, the purpose is not to prevent breakage.

  FIG. 7 shows an example in which a plurality of drain pipes 6 are concentrated on one water-sealed trap 2. In this case, the water-sealed trap 2 is not a trap made of a U-shaped tube, but is constructed by inserting the end portion of the drain pipe 6 into a trough in which water is stored so that the function as a trap can be exhibited. . In this case, since the sealed water is restored by using any one drainage device connected even if it is broken, the trap function can be more reliably maintained.

  Next, an embodiment of the second drainage structure, that is, an embodiment in which a drainage chamber serving as a head pressure acquisition means is provided at the most upstream part of the drainage pipe having a reverse slope portion will be described.

  In FIG. 8, the drainage chamber 23 is provided at the drainage port of the drainage device 4 which is the most upstream part of the drainage pipe 6. The water seal trap is not located between the drain chamber 23 and the drain port, and a part of the drain pipe 6 has a reverse slope portion 20 to form a water seal trap.

  The depth of the drainage chamber 23 is set to be a value larger than the height of the reverse gradient portion 20. For example, when the height of the reverse gradient portion 20 existing in the drain pipe 6 is 120 mm, the depth of the drain chamber 23 may be 120 mm or more, but the depth is set to 300 mm or more. In addition, when the reverse slope part which is not shown in figure in the drain pipe 6 exists in multiple places, a drainage chamber must be higher than the sum total of the height of each reverse slope part also including a water seal trap.

  Further, the cross section of the drainage chamber 23 needs to have an area and shape that can be easily replaced with the drained water flowing down and the rising air in the pipe, and in the case of a circular shape, the diameter is required to be 30 mm or more. However, if the cross-sectional area of the drain chamber 23 is too large, it will be difficult to obtain the necessary head pressure inside the drain chamber, and if the vent pipe described later is not installed, the cross-sectional area of the drain chamber will be enlarged. As a result, the drainage port of the drainage device 4 becomes larger, but a drainage port that is larger than necessary makes the usability of the drainage device worse. Therefore, in reality, the inner diameter of the drain chamber is selectively used between 30 mm and 200 mm. In this embodiment, the diameter of the drain pipe 6 (flexible synthetic resin pipe) is set to 20 mm, and the inner diameter of the drain chamber 23 is set to 50 mm.

  By adopting such a configuration, the drainage drained from the drainage device 4 immediately 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 accumulated in the drain chamber 23 is larger than the height of the reverse gradient portion 20 in the drain pipe 6. When it becomes, it flows into the drainage pipe 6 from the drainage chamber 23, gets over the reverse gradient part 20 at a stretch, and distribute | circulates downstream. For this reason, the inside of the drain pipe 6 is filled with water, a suction force is generated in the vertical gradient downstream pipe, and thereafter drainage continues until there is no water remaining in the drainage device 4. Therefore, the siphon effect can be reliably generated, and quick drainage upstream of the reverse gradient portion can be realized.

  As shown in FIG. 8, when the target drainage device 4 is arranged on the first floor, the standpipe that applies suction to the drainage is shortened, and thus the driving force for moving the drainage may be insufficient. Even in such a case, the water head formed in the drain chamber 23 is advantageous because it adds a driving force to the drain as a pushing pressure.

  The purpose of the drainage chamber is to smoothly replace drained water and rising pipe air, and to obtain water head pressure inside the drainage chamber, so the drainage port that is connected to the drainage device is also suitable for replacement. However, if this does not come true due to various circumstances, a route for ventilation is secured in the drainage chamber.

  FIG. 9 shows an example of the drainage device 4 (basin) in which the drain pipe is connected sideways in order to make a large storage space below the vanity counter, and a vent pipe 26 is attached to the drain chamber 21. The vent pipe 26 is open to the atmosphere in a state where the end portion is disposed at a position higher than the upper surface of the drainage device 4. In this example, the drainage device 4 cannot drain the water without the vent pipe 26. This is because the drainage of the drainage device 4 has a water level higher than that of the reverse gradient portion 20 due to the presence of air sandwiched between the wastewater stored in the drainage device 4 and the wastewater staying in the reverse gradient portion 20. This is because it can hardly move downstream unless the water level exceeds that.

  However, if the vent pipe 26 is attached, the air existing between the drainage device 4 and the reverse gradient portion 20 can move to the atmosphere through the vent tube 26. Since it can flow into the drainage chamber 21 and the head pressure is generated in the drainage chamber 21, it flows over the reverse gradient portion 20 at a stretch and flows downstream. In this process, the siphon effect is exhibited and the upstream side of the reverse gradient portion 20 It becomes possible to apply a suction force to. This suction force acts in the drainage chamber 21, and the drainage flowing from the drainage device 4 can be sucked and drained quickly.

  FIG. 10A is a diagram for explaining an example in which a drain chamber 23 is provided at the drain outlet of a washbasin as the drain device 4. In the figure, a pocket 24 a is 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 washbasin 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 an air discharge passage (vent pipe) existing in the drain chamber 23. For this reason, even when the drainage port of the drainage device 4 is small, the air in the drainage chamber 23 can be expelled efficiently, and the necessary head pressure can be obtained quickly (FIGS. 10B, 10C, and 10D). )).

  The drain chamber also has a function of temporarily collecting drainage and effectively sucking it. As shown in FIG. 10E, even if there is no drainage chamber, the siphon is started and a suction force is generated if conditions such as the level of drainage in the drainage device 4 rises. 4 reaches not only the waste water accumulated in 4 but also the indoor air through the overflow port 24b. As a result, the wastewater and the air that has entered from the overflow port flow alternately or mixed, generating noise and draining time.

  If a drainage chamber is provided as shown in FIG. 10D, the suction force acts only on the drainage in the chamber 23, and air is not sucked. Even when wastewater is further accumulated in the drainage device 4, the wastewater accumulates in the drainage chamber while expelling air from the overflow port 24b, so that smooth drainage can be continued.

  As described above, if the drainage chamber according to the present invention is provided in the drainage device, not only can the head pressure required for starting siphon be obtained, but also after the siphon start, the overflow port that prevents drainage suction is reversed in the drainage chamber. It can also be used as a vent for effectively dropping the drainage.

  The drainage chamber 23 is a mechanism that acquires the head pressure against the drained water accumulated in the reverse gradient and pushes the air in the pipe downstream, so if the head pressure can be secured, other functions are built in it. There is no problem. For example, a net cage that does not allow the kite to flow may be incorporated.

  In FIG. 11A, a drain chamber 23 is provided at the drain port of the drain device 4 as a washbasin, and a barrier cylinder 25 having wings for preventing the generation of vortices is disposed in the drain chamber 23. When the barrier cylinder 25 is not provided, as shown in FIG. 11B, a vortex 57 is generated at the drain outlet, and a part of the suction force is used for suction of air. Since the amount of drainage falling through the drainpipe 51 is also reduced, the suction force itself generated in the drainpipe 51 is weakened and the drainage capacity is reduced. If the barrier cylinder 25 is built in the drain chamber 23 as shown in FIG. 11A, it is difficult for vortices to be generated, and it is possible to continue to exert a strong siphon effect until there is no drainage.

  As described above, the head pressure acquisition means provided on the uppermost stream side of the small-diameter drain pipe 6 according to the present invention has a reverse slope portion in the drain pipe when the drain pipe has a reverse slope. The function of substituting the air staying in the upstream side with the waste water is exerted, and a water head pressure larger than the height of the reverse slope portion is applied to the waste water drained from the drainage device to get over the reverse slope portion.

  In particular, a great effect is exhibited when a flexible pipe having a merit in improving workability is used as a drain pipe. In other words, the flexible tube is likely to have a reverse slope portion between the support portions, and the siphon function may not be obtained. However, the depth of the drainage chamber which is the hydraulic head pressure acquisition means according to the present invention may have occurred. If enough is taken, this problem can be easily overcome.

  FIG. 12 is an example of a third drainage structure according to the present invention. The drain pipe 60 of the present embodiment has a vibration absorbing material 62 made of glass wool on the outside of a flexible pipe material 61, and is made of a high specific gravity rubber sheet that is flexible and dense on the outside. A sound insulating material 63 is arranged. This structure is preferably formed integrally in a factory. This is because according to the above drainage structure, drainage noise caused by drainage disturbance can be reduced without troublesome sound insulation work after completion of piping.

  As the vibration absorbing material 62, a material in which fibers such as rock wool and non-woven fabric are entangled in addition to glass wool, or a foamed material such as sponge or foamed polyethylene can be used. As the sound insulating material 63, butyl rubber or the like can be used. In addition to high specific gravity rubber sheets, modified asphalt composites, flexible metal tubes, and the like can be used.

  As described above, in the siphon drainage system, the drainage is sucked by the action of the siphon, but when the drainage amount does not meet the drainage amount or just before the end of drainage, air is sucked into the drainage pipe together with the drainage, and the drainage flow is It may be greatly disturbed to vibrate the drain pipe and become a noise source. However, according to this structure, the vibration absorbing material absorbs the vibration of the pipe and prevents the vibration from being transmitted to the building side, and further, the noise generated inside the pipe line material 61 of the drain pipe 60 can be contained by the sound insulating material. be able to.

  In order to achieve such a structure after completion of piping work, a vibration absorbing material or a sound insulating material is wound around the flexible drain pipe so that it does not escape, so that it does not become a trap or a gap at the bent part. In addition, it is necessary to wind a vibration absorbing material and a sound insulating material, which is troublesome. According to the present structure, such labor can be saved, and the construction improvement which is a merit of the flexible drain pipe can be sufficiently achieved.

  Further, when the siphon drainage system is applied to rainwater drainage and concealed indoors, the winter interior is warm and the rainwater flowing in the drainage pipe is cold, which may cause condensation on the outer surface of the pipe. In order to prevent this, the pipe needs to be heat-insulated, but the vibration absorbing material is a material containing a lot of air, and these also have a heat-insulating function. Further, since the sound insulating material is made of a dense material so as not to leak sound, it has a high moisture resistance and blocks water vapor that causes condensation. Therefore, the drainage pipe with this structure will also have the feature that it is difficult to condense, and when the rainwater drainage is flowed indoors by the siphon drainage system, it will demonstrate its performance in both sound insulation and heat insulation. I can do it.

  FIG. 13 is a schematic view of an embodiment of the fourth drainage structure according to the present invention. Specifically, the first and second drainage structures are combined, and the drainage chamber 23 is provided on the uppermost stream side of the drainage pipe 6 and the water seal trap 2 is provided at a level below the lower end of the drainage vertical pipe 1. It is a figure explaining the drainage structure which prevents the breakage of a water seal trap, and can implement | achieve quick drainage even if it is a case where a reverse gradient exists in a drain pipe.

  In FIG. 13, a substance having a specific gravity greater than that of water is present in the drainage drained from the drainage device 4 by setting the connection portion of the drainage pipe 6 to the drainage chamber 23 to the position of the side surface 23b separated from the bottom 23a. In this case, this substance can be precipitated in the bottom 23a of the drainage chamber 23.

  As described above, the drainage system using the conventional siphon has various merits as described in the “Prior art” section at the beginning, but it has the disadvantage that it is easy to break due to the use of the siphon. had. In addition, once suction force is generated, water can be drained even if there is a reverse gradient, but because of the small diameter, if wastewater accumulates in the reverse gradient part, the upstream air can be easily drained with new drainage. There was also a disadvantage that drainage did not start because it was not replaced with. In addition, there was a problem of noise generation due to siphon action.

  However, the drainage structure according to the present invention solves these problems, enables the space saving of the siphon drainage system, enables the use of flexible pipes, and facilitates the planning of the construction plan, thereby reducing the construction cost. Furthermore, since pipe space etc. become small, only the merit that the effective space after construction can be taken widely can be utilized now.

  As an application example of the present invention, the present invention can be used for all drainage structures that realize smooth drainage by utilizing the action of siphons.

It is a figure explaining the drainage structure which provided the water seal trap in the vicinity of the upstream edge part of a drainage pipe. It is a figure explaining the subject at the time of a reverse slope part existing in a drain pipe. It is a figure which illustrates typically the drainage structure which provided the water seal trap in the level below the lower end of a drainage standpipe. It is a figure which illustrates typically the example which provided the drainage chamber as a water head pressure acquisition means. It is a figure explaining the relationship between a drainage standpipe and a water seal trap. It is the figure which looked at FIG. 5 from the front, and is a figure explaining the example of installation of a drain stand. It is a figure explaining the example which connected the some drainage pipe to one water seal trap. It is a figure explaining the composition of the drainage chamber in the 1st floor kitchen. It is the figure which provided the ventilation means to the drainage chamber. It is a figure explaining the structural example of the drainage chamber in (a)-(d) washbasin. (E) It is a figure explaining the case where it drains, without attaching a drainage chamber to a toilet bowl. (A) It is a figure explaining the example which has arrange | positioned the barrier cylinder to the drainage chamber installed in the washbasin. (B) It is a figure explaining a mode that a vortex generate | occur | produces in a toilet bowl and air is attracted | sucked. It is a figure explaining the 3rd drainage structure of the present invention. It is a figure explaining the example which provided the drainage chamber in the uppermost stream side of the drainage pipe, and provided the water seal trap in the level below the lower end of a drainage standpipe.

Explanation of symbols

1 ... drainage standpipe, 2 ... water seal trap, 3 ... drainage basin,
4 ... Drainage device, 5 ... Connecting pipe, 6 ... Drainage pipe, 7 ... Outer wall, 7a ... Wall space,
8… foundation, 9… external piping, 10… beam, 11… sheath tube, 12… underground underground piping,
13… floor finish, 14… floor board (slab),
20 ... reverse slope part, 21 ... drainage chamber, 23 ... drainage chamber,
23a ... bottom, 23b ... side, 24a ... pocket, 24b ... overflow port,
25… Barrier tube, 26… Vent pipe,
51… Drain pipe, 52… Drainage device, 53… Water seal trap,
54… highest part, 55… drainage, 57… vortex,
60… drain pipe, 61… pipe material, 62… vibration absorber, 63… sound insulation,
100… Drainage pipe

Claims (4)

A drainage structure utilizing the action of a siphon that uses a small-diameter drainage pipe and has a drainage stand connected to a drainage device,
A drainage structure characterized in that a water-sealed trap is provided downstream from the lower end of a drainage standpipe that exhibits suction power. A drainage structure utilizing the action of a siphon that uses a small-diameter drainage pipe and has a drainage stand connected to a drainage device,
A drainage structure characterized by providing a head pressure acquisition means for obtaining head pressure at the most upstream side of the small-diameter drain pipe. A drainage structure utilizing the action of a siphon that uses a small-diameter drainage pipe and has a drainage stand connected to a drainage device,
The drainage structure according to claim 1, wherein the drainage pipe is a flexible pipe integrally formed with a pipe line material, a vibration absorbing material outside the pipe line material, and a sound insulating material outside the vibration absorbing material. A drainage structure comprising two or more drainage structures according to any one of claims 1 to 3.

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