A swirl-type in-floor drainage system

Abstract

The present invention discloses a swirl-type same-floor drainage system, which relates to the technical field of building drainage systems and includes: a drainage collector having a first drainage port and a second drainage port on its side wall; a drainage riser respectively connected to the upper end and the lower end of the drainage collector; a toilet drainage pipe whose water inlet end is communicated with a toilet; a water seal protection device for the toilet drainage port, whose water inlet end is communicated with the water outlet end of the toilet drainage pipe, and the water outlet end is communicated with the first drainage port through an arc-shaped pipe; a floor drain drainage pipe whose water inlet end is connected with a same-floor drainage floor drain; a water trap, whose water inlet end is communicated with the water outlet end of the floor drain drainage pipe, and the water outlet end is communicated with the second drainage port. The beneficial effects of the present invention are that swirl drainage is adopted, which has little interference with the air pressure in the riser, low noise, large drainage flow rate, and water seal protection measures are adopted to ensure the safety of the water seal. The use of flat pipes and flat pipe fittings for floor drain drainage can effectively solve the conflict between the thickness of the cushion layer and the size of the pipe diameter, which is convenient for popularization and application.

Description

Technical Field

[0001] The present invention relates to the technical field of building drainage systems, and particularly to a swirl-type same-floor drainage system. Background Art

[0002] For a long time in China, traditional inter-floor drainage methods have been adopted in residential buildings. With the rapid development of the national economy, people no longer solely focus on functionality and cost factors, but have increasingly higher requirements for the hygiene, design, convenience, comfort, and personalization of residences. This poses new requirements for the construction of traditional residences. In recent years, urban planning departments and architectural design departments have placed more emphasis on the design concept of "people-oriented", paid more attention to creating a more user-friendly design space, shown increasing concern for people, respect for people, and paid more attention to people's emotional and cultural needs for buildings. Against this background, many problems of inter-floor drainage have gradually become prominent and can no longer meet people's requirements for building drainage, and same-floor drainage has emerged as the times require.

[0003] China's regulations on residential buildings encourage the same-floor drainage method: Article 8.2.8 of the "Code for Residential Design" (GB50096-2011) stipulates that the waste and wastewater drainage horizontal pipes in a residence should preferably be installed within the suite on this floor; Article 4.3.8 of the "Code for Design of Building Water Supply and Drainage" (2009 Edition of GB50015-2003) stipulates that the drainage horizontal branch pipes of sanitary appliances should be provided with same-floor drainage under the following circumstances, and Article 4.3.8A stipulates that the same-floor drainage form of a residential bathroom should be determined through technical and economic comparison based on factors such as the bathroom space, the layout of sanitary appliances, and the outdoor ambient temperature, and Article 4.3.8B stipulates that the same-floor drainage design should meet the following requirements; Article 2.7.4 of the "Technical Essentials for Healthy Residential Construction" (2004 Edition) stipulates that the drainage branch pipes should be bounded by this household. Some of the above provisions use "preferably", and some use "should". However, they all express the same concept that the drainage design of a residential bathroom should adopt the same-floor drainage method.

[0004] Same-floor drainage refers to a building drainage system in which the drainage pipes (including the sewage drainage horizontal pipe and the drainage branch pipe) of sanitary appliances (including those in the kitchen, balcony, etc.) in the bathroom do not penetrate the floor slab of this floor and enter the lower space, but are laid on the same floor as the sanitary appliances and are connected to the drainage riser within this floor. Compared with the traditional inter-floor drainage treatment method, the most fundamental concept change in the same-floor drainage scheme is to completely get rid of the constraints between adjacent floors through the reasonable layout of pipes within this floor, avoid a series of troubles and potential hazards caused by the occupation of the lower space by the drainage horizontal pipe, and users can, according to their own preferences and wishes, individually arrange the positions of bathroom fixtures.

[0005] The current in-slab drainage installation method aims to rationally lay pipes based on in-slab drainage according to different bathroom layouts to meet the effective drainage and sewage discharge standards. It can be divided into four different methods from the perspective of wall structure installation methods: ① Drop panel: that is, the method of sinking the bathroom floor slab (or partial floor slab); ② Wall drainage (characterized by a pipeline concealed installation system); ③ Cushion type; ④ Non-drop panel.

[0006] In engineering practice, different in-slab drainage methods have their own characteristics and application scopes. The wall drainage type of in-slab drainage technology is relatively mature, but it has many disadvantages; the drop panel type of in-slab drainage is a Chinese in-slab drainage technology that is prone to water accumulation and difficult for maintenance workers; the cushion type is only suitable for renovation of old buildings. The characteristics of non-drop panel in-slab drainage are: (1) Realize in-slab drainage without dropping the floor slab for floor drains in bathrooms / kitchens / balconies. (2) Improve drainage safety: By sharing the water seal for drainage facilities such as washbasins, floor drains, and showers, it ensures the long-term effectiveness of the water seal function of each drainage appliance in the system, and a check valve device that slows down the evaporation of the water seal greatly improves drainage safety. At the same time, it also blocks the cross-layer transmission of viruses and bacteria. (3) Improve space utilization efficiency: The traditional drop panel in-slab drainage has a large drop height of the floor slab and a small net height between floors, especially more obvious after installing an electric water heater. People feel depressed when entering the bathroom, while the non-drop panel in-slab drainage has high space utilization efficiency. (4) Save building materials and reduce project costs: Compared with the waterproof materials and backfill materials consumed by the traditional drop panel in-slab drainage, the non-drop panel drainage system greatly reduces the usage of these materials, reduces the construction difficulty and project costs, and has the prerequisite for large-scale promotion and application in engineering. The non-drop panel in-slab drainage is a current advanced drainage system, but it also has its limitations. Imperfect products and standards have hindered its promotion and application.

[0007] The existing non-drop panel in-slab drainage systems on the market have the following problems: First, the drainage system adopts a split design, and the sealant or rubber ring at the lap joint will age after long-term use, resulting in a risk of leakage; second, with or without a centralized water seal with a filter net, there is a risk of cross-layer transmission of viruses and bacteria in the drainage pipeline, posing a safety risk; third, the sewage in the water seal directly drains into the riser, causing large air disturbances in the riser, large changes in the air pressure in the riser, which easily destroys the water seal of the water seal and reduces the airtightness, and is prone to "bad smell" in the bathroom and cross-layer transmission of bacteria and viruses; fourth, the connecting pipes and pipe fittings of the floor drain all use circular pipes and fittings, resulting in a conflict between the pipe size and the thickness of the cushion layer on the floor slab. Summary of the Invention

[0008] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and provide a swirl type in-slab drainage system.

[0009] The technical solution of the present invention is as follows:

[0010] A swirl-type same-floor drainage system, comprising:

[0011] A drainage collector, having a first drainage port and a second drainage port on its side wall;

[0012] A drainage riser, respectively connected to the upper end and the lower end of the drainage collector;

[0013] A toilet drainage pipe, the water inlet end of which is communicated with a toilet;

[0014] A water seal protection device for the toilet drainage port, the water inlet end of which is communicated with the water outlet end of the toilet drainage pipe, and the water outlet end is communicated with the first drainage port through an arc-shaped pipe;

[0015] A floor drain drainage pipe, a same-floor drainage floor drain being connected to the water inlet end thereof;

[0016] A water seal bend, the water inlet end of which is communicated with the water outlet end of the floor drain drainage pipe, and the water outlet end is communicated with the second drainage port.

[0017] Preferably, the water seal bend is a curved pipe, the water seal bend is arranged around the side wall of the drainage collector, and the water inlet end of the water seal bend is higher than its water outlet end.

[0018] Preferably, the drainage collector and the water seal bend are of an integral structure.

[0019] Preferably, one end of the water seal bend close to the floor drain drainage pipe further has a water inlet for replenishing water into the water seal bend.

[0020] Preferably, a water inlet pipe is connected to the water inlet, and a controller for controlling the on-off of the water inlet pipe is connected to the water inlet pipe.

[0021] Preferably, the water seal protection device for the toilet drainage port comprises a housing with both ends open and a movable plate for separating the two open ends of the housing, the movable plate is movably arranged in the housing, and the movable plate can rotate along the inner wall of the housing under the action of water pressure to communicate the two ends of the housing.

[0022] Preferably, the movable plate is inclined relative to the horizontal direction and arranged in the housing, the upper end of the movable plate is hinged to the inner wall of the housing, and the lower end can rotate towards the direction close to the drainage collector along the hinged end.

[0023] Preferably, a baffle is arranged on the bottom wall of the housing, and the baffle abuts against the lower end of the movable plate to limit the rotation of the movable plate towards the direction close to the toilet drainage pipe.

[0024] Preferably, swirling vanes protruding laterally are provided on both the inner walls of the drainage collector and the drainage riser, and the swirling vanes are obliquely arranged on the inner walls of the drainage collector and the drainage riser.

[0025] Preferably, the floor drain drain pipe is an oval pipe, and the minor axis of the oval pipe is arranged in the vertical direction.

[0026] The present invention has at least one of the following beneficial effects:

[0027] 1. By providing a curved water seal bend, the present invention not only realizes centralized water sealing in the floor drain part, avoiding the entry of odors, bacteria, viruses, etc. in the drainage riser into the room through the same-floor drainage floor drain and causing pollution, but also realizes swirling drainage through the water seal bend, with little interference to the air pressure fluctuation in the drainage riser, low noise, and large drainage flow rate.

[0028] 2. By providing a water inlet on the water seal bend, the present invention replenishes and dredges the water seal bend through the water inlet, improving the water seal safety and drainage smoothness of the water seal bend, avoiding blockage, and controlling the timing of water replenishment and closing of the water seal bend through a controller, which is more convenient for control.

[0029] 3. By providing a water seal protection device for the toilet drain outlet, the present invention can prevent the entry of odors, bacteria, viruses, etc. in the drainage riser into the toilet, and can also prevent rats, insects, etc. from climbing into the toilet from the drainage riser. Moreover, the toilet drain pipe drains through the tangential drainage of the arc pipe, which can reduce the eddy current phenomenon, make the drainage smoother, and reduce the air pressure fluctuation in the drainage riser.

[0030] 4. The water seal bend and the drainage collector of the present invention are of an integral structure, which not only improves the structural stability but also reduces the risk of leakage compared with the split structure.

[0031] 5. The floor drain drainage system of the present invention uses flat pipes and their pipe fittings to solve the contradiction between the pipe diameter size and the cushion size. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of a preferred embodiment of the present invention Figure 1 ;

[0033] Figure 2 is a schematic structural diagram of a preferred embodiment of the present invention Figure 2 ;

[0034] Figure 3 is a schematic diagram of a partial structure in a preferred embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of the internal structure of the drainage riser and the drainage collector in a preferred embodiment of the present invention;

[0036] Figure 5 This is a top - view structural schematic diagram of the drainage collector and the water seal bend in the preferred embodiment of the present invention;

[0037] Figure 6 This is a structural schematic diagram of the water - seal protection device for the toilet drainage outlet in the preferred embodiment of the present invention;

[0038] Figure 7 This is an internal structural schematic diagram of the water - seal protection device for the toilet drainage outlet in the preferred embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the usage state in the preferred embodiment of the present invention;

[0040] Reference numerals: 1, drainage riser; 2, drainage collector; 3, water - seal protection device for toilet drainage outlet; 4, square - round adapter; 5, toilet drain pipe; 6, water inlet pipe; 7, controller; 8, floor drain pipe; 9, connecting pipe clamp; 10, drainage tee; 11, elbow pipe; 12, same - floor drainage floor drain; 13, floor slab layer; 14, cushion layer; 15, finishing layer; 21, arc - shaped pipe; 22, water seal bend; 23, water inlet; 31, movable plate; 32, outer shell; 33, baffle. Detailed implementation manners

[0041] The following uses specific embodiments to further elaborate on the present invention in detail, but the present invention is not limited to the following specific embodiments.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] As Figures 1-7 shown, this embodiment provides a swirl-type same-floor drainage system, which is suitable for installation without lowering the floor in the bathroom and is used for the drainage of floor drains and toilets. The drainage system includes a drainage riser 1, a drainage collector 2, a toilet drain pipe 5, a water seal protection device 3 for the toilet drainage outlet, a floor drain pipe 8, and a trap 22.

[0045] The number of drainage risers 1 is two, which are respectively connected to the upper end and the lower end of the drainage collector 2. The inner wall of the drainage riser 1 is provided with swirl vanes 16 protruding laterally. The swirl vanes 16 are inclined, so that when sewage passes through the inside of the drainage riser 1, it will hit the swirl vanes 16 to form a swirl. In this embodiment, the number of swirl vanes 16 is 3, and the 3 swirl vanes 16 are evenly spaced. In practical applications, the number of swirl vanes 16 can be 1, 2, or more, which can be determined according to actual situations.

[0046] The upper end and the lower end of the drainage collector 2 are open to communicate with the drainage riser 1. The side wall of the drainage collector 2 has a first drainage port and a second drainage port; the inner wall of the drainage collector 2 is also provided with swirl vanes 16 protruding laterally. The swirl vanes 16 are inclined, so that when sewage passes through the inside of the drainage collector 2, it will hit the swirl vanes 16 to form a swirl. In this embodiment, the number of swirl vanes 16 is 3, and the 3 swirl vanes 16 are evenly spaced. In practical applications, the number of swirl vanes 16 can be 1, 2, or more, which can be determined according to actual situations.

[0047] The water inlet end of the toilet drain pipe 5 is connected to the toilet, and the water outlet end is connected to the water seal protection device 3 for the toilet drainage outlet. The water outlet end of the water seal protection device 3 for the toilet drainage outlet is connected to the first drainage port through an arc-shaped pipe 21, that is, connected to the drainage collector 2. The function of the water seal protection device 3 for the toilet drainage outlet is to realize the water seal of the toilet drain pipe 5, prevent the odors, bacteria, viruses, etc. in the drainage collector 2 and the drainage riser 1 from entering the toilet, and at the same time prevent rats, insects, etc. from climbing into the toilet from the drainage riser 1.

[0048] In this embodiment, the toilet drain outlet water seal protection device 3 includes a movable plate 31 and a shell 32 with openings at both ends. One end of the openings at both ends of the shell 32 is connected to the toilet drain pipe 5 through the square-circle adapter 4, and the other end is connected to the arc tube 21 through the square-circle adapter 4. A sealing structure is provided between the two ends of the shell 32 and the square-circle adapter 4 to prevent water leakage. The movable plate 31 is provided in the shell 32 to block the openings at both ends of the shell 32, and the movable plate 31 can move in the shell 32, so that under the action of a certain water pressure, the movable plate 31 can rotate along the inner wall of the shell 32 to connect the two ends of the shell 32. Specifically, the movable plate 31 is tilted toward the toilet drain pipe 5 and is arranged in the shell 32. The upper end of the movable plate 31 is hinged on the inner wall of the shell 32, and the lower end is abutted against the bottom end of the shell 32. Therefore, under the action of a certain water pressure, the lower end of the movable plate 31 can rotate along the hinged end toward the drainage collector 2 to connect the two ends of the shell 32, so that the water discharged from the toilet drain pipe 5 can enter the drainage collector 2 through the toilet drain outlet water seal protection device 6. At the same time, a bottom wall of the shell 32 is provided. There is a baffle 33 The baffle plate 33 abuts against the lower end of the movable plate 31 to limit the movable plate 31 from rotating toward the toilet drain pipe 5, so that the movable plate 31 can only rotate toward the drain collector 2, but cannot rotate in the opposite direction, thereby preventing odors, bacteria, viruses, etc. from the drain collector 2 and the drain riser 1 from entering the toilet, and also preventing rats, insects, etc. from crawling into the toilet from the drain riser 1. In this embodiment, The baffle 33 and the outer shell 32 are of an integral structure The arc tube 21 is arranged horizontally. Since the arc tube 21 has a certain curvature, the water discharged from the toilet bowl flows horizontally through the arc tube 21 to form tangential drainage, and then swirls into the drainage collector 2 under the action of gravity. The tangential drainage can reduce the vortex phenomenon, make the drainage smoother, and reduce the pressure fluctuation in the drainage riser 1.

[0049] The floor drain drainage pipe 8 is horizontally arranged, that is, horizontally along the floor slab layer. In this embodiment, the number of floor drain drainage pipes 8 is two, and the two floor drain drainage pipes 8 are connected through a drainage tee 10. The floor drain drainage pipe 8 and the drainage tee 10 are connected through a connecting pipe clamp 9. The other inlet end of the drainage tee 10 is connected with a same-floor drainage floor drain 12. The inlet end of the floor drain drainage pipe 8 is connected with another same-floor drainage floor drain 12 through an elbow pipe 11. The elbow pipe 11 and the floor drain drainage pipe 8, the same-floor drainage floor drain 12 are both connected through a connecting pipe clamp 9. The outlet end of the floor drain drainage pipe 8 is connected with a water seal bend 22, and the outlet end of the water seal bend 22 is communicated with the second drainage port, that is, communicated with the drainage collector 2. In this embodiment, the floor drain drainage pipe 8, the connecting pipe clamp 9, the drainage tee 10 and the elbow pipe 11 are all flat pipes, specifically, they can be oval pipes, and the short axis of the oval pipe is arranged vertically. Thus, when the pipes are horizontally distributed, the height of the flat pipe is lower, and when installed on the same floor, the conflict with the thickness of the cushion layer on the floor slab layer is reduced.

[0050] In this embodiment, the water seal bend 22 is a curved pipe, specifically, it can be approximately S-shaped or approximately W-shaped, etc. The water seal bend 22 is arranged around the side wall of the drainage collector 2, and the inlet end of the water seal bend 22 is higher than its outlet end. Since the water seal bend 22 is curved and arranged around the side wall of the drainage collector 2, the water discharged from the floor drain drainage pipe 8 forms a swirling flow and tangentially discharges into the drainage collector 2 through the water seal bend 22, making the drainage smoother, with better self-cleaning and swirling effects, a larger water seal ratio, better water seal stability, capable of reducing the air pressure fluctuation in the drainage riser 1, and because the water seal bend 22 is curved, that is, the height of its bottom wall is different, thus a water seal can be formed, and the odor, bacteria, virus, etc. in the drainage collector 2 and the drainage riser 1 can be prevented from entering the room through the same-floor drainage floor drain 12, causing pollution. In this embodiment, the drainage collector 2 and the water seal bend 22 are of an integral structure, thus eliminating the need to use sealant or rubber rings, reducing the risk of water leakage caused by the aging of the sealant or rubber rings after long-term use.

[0051] An inlet 23 for replenishing water into the water seal bend 22 is also provided on the water seal bend 22. Specifically, the inlet 23 is arranged at one end close to the floor drain drainage pipe 8, so as to replenish tap water into the water seal bend 22 through the inlet 23, and use the tap water pressure to dredge the water seal bend 22, which not only ensures the safety of the water seal of the water seal bend 22 and the smooth drainage of the water seal bend 22, but also prevents blockage. A water inlet pipe 6 is connected to the inlet 23. The inlet end of the water inlet pipe 6 can be communicated with tap water. A controller 7 for controlling the on-off of the water inlet pipe 6 is connected to the water inlet pipe 6. The controller 7 automatically controls the dredging or closing of the water seal bend 22, or the controller 7 can be set to dredge and close the water seal bend 22 regularly, enabling timely dredging of the water seal bend 22 and convenient control.

[0052] As Figure 8 shown, when the drainage system in this embodiment is installed, the floor drain drainage pipe 8, the connecting pipe clamp 9, the drainage tee 10, the elbow pipe 11 and the same-floor drainage floor drain 12 are all laid on the cushion layer 14, and then the finishing layer 15 is laid on the cushion layer 14, that is, the same-floor drainage of the system is realized. In actual application, the positions of the floor drain water inlet and the toilet water inlet can be adjusted according to specific requirements.

[0053] In this embodiment, by setting the curved water seal 22, it not only realizes the centralized water seal for the floor drain part, avoiding the entry of odors, bacteria, viruses, etc. from the drainage collector 2 and the drainage riser 1 into the room through the same-floor drainage floor drain 12 and causing pollution, but also realizes swirl drainage through the water seal 22, making the drainage smoother. By setting the toilet drain water seal protection device 3, it can prevent the entry of odors, bacteria, viruses, etc. from the drainage collector 2 and the drainage riser 1 into the toilet, and can also prevent rats, insects, etc. from climbing into the toilet from the drainage riser 1. The toilet drainage pipe 5 drains water tangentially through the arc-shaped pipe 21, which can reduce the eddy current phenomenon, make the drainage smoother, and can reduce the air pressure fluctuation in the drainage riser 1. The water seal 22 and the drainage collector 2 are of an integral structure, which not only improves the structural stability of the water seal 22, but also reduces the leakage risk compared with the split structure. The water seal 22 is provided with a water inlet, and the water seal 22 is replenished and dredged through the water inlet, improving the water seal safety and drainage smoothness. The floor drain drainage system uses flat pipes and their fittings to solve the contradiction between the pipe diameter size and the cushion layer size.

[0054] The above are only the characteristic implementation examples of the present invention, and do not constitute any limitation to the protection scope of the present invention. Any technical solutions formed by equivalent exchange or equivalent substitution fall within the scope of the protection of the present invention.

Claims

1. A swirl-type same-floor drainage system, characterized in that, Comprising: A drainage collector (2) having a first drain outlet and a second drain outlet on its side wall; a drain riser (1) connected to the upper end and the lower end of the drainage collector (2) respectively; a toilet drain pipe (5) whose water inlet end is communicated with a toilet; a toilet drain water seal protection device (3) whose water inlet end is communicated with the water outlet end of the toilet drain pipe (5), and the water outlet end is communicated with the first drain outlet through a curved pipe (21); a floor drain pipe (8) whose water inlet end is connected with a same-floor drainage floor drain (12); a water seal bend (22) whose water inlet end is communicated with the water outlet end of the floor drain pipe (8), and the water outlet end is communicated with the second drain outlet. The water seal bend (22) is a curved pipe, the water seal bend (22) is arranged around the side wall of the drainage collector (2), and the water inlet end of the water seal bend (22) is higher than its water outlet end. The drainage collector (2) and the water seal bend (22) are of an integral structure. The water seal bend (22) further has a water inlet (23) for replenishing water into the water seal bend (22) at one end close to the floor drain pipe (8). A water inlet pipe (6) is connected to the water inlet (23), and a controller (7) for controlling the on-off of the water inlet pipe (6) is connected to the water inlet pipe (6). The toilet drain water seal protection device (3) includes a housing (32) with openings at both ends and a movable plate (31) for blocking the openings at both ends of the housing (32). The movable plate (31) is movably arranged in the housing (32), and the movable plate (31) can rotate along the inner wall of the housing (32) under the action of water pressure to communicate the two ends of the housing (32). The movable plate (31) is inclined relative to the horizontal direction in the housing (32), and the upper end of the movable plate (31) is hinged to the inner wall of the housing (32), and the lower end can rotate along the hinge end towards the direction close to the drainage collector (2). A baffle (33) is arranged on the bottom wall of the housing (32), and the baffle (33) abuts against the lower end of the movable plate (31) to limit the rotation of the movable plate (31) towards the direction close to the toilet drain pipe (5). Laterally protruding swirl vanes (16) are arranged on the inner walls of the drainage collector (2) and the drain riser (1), and the swirl vanes (16) are inclined on the inner walls of the drainage collector (2) and the drain riser (1).

2. The swirl-type in-floor drainage system according to claim 1, wherein The floor drain pipe (8) is an oval pipe, and the minor axis of the oval pipe is arranged in the vertical direction.

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