Closestool blow-off pipe

Abstract

The utility model relates to the technical field of sanitary ware accessories, in particular to a toilet bowl blow-off pipe which comprises a blow-off pipe body, the blow-off pipe body comprises a water inlet connector, a bent pipe and a water drainage connector, the bent pipe spirally extends from the outer edge to the center, the horizontal height of the bent pipe in the spiral direction changes in a fluctuating mode, and the water drainage connector is connected with the water inlet connector. The end, located on the outer edge, of the bent pipe is communicated with the water inlet connector, and the end, located in the center, of the bent pipe is communicated with the water drainage connector. By the adoption of the toilet bowl blow-off pipe, the water-saving effect is obvious, and the application requirement of a first-stage water effect urinal is met.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary ware accessories, in particular to a toilet sewage pipe. Background Art

[0002] Ceramic urinals widely use external pipes for drainage in the market. This design not only simplifies the ceramic structure and reduces production costs, but also meets the installation requirements of various scenarios. Specifically, this drainage method is to connect a plastic drainage pipe to the drainage outlet of the urinal, and then connect this plastic drainage pipe to the pipe reserved on the wall or ground, so as to achieve smooth drainage. Plastic pipes have the advantages of strong versatility and can be cut according to actual installation requirements, which is convenient for construction.

[0003] At present, saving water resources and protecting the environment have formed a broad social consensus, and government departments are also actively promoting the implementation of relevant policies. Class 1 water-efficient urinals with excellent water-saving performance and environmental protection characteristics have become the mainstream of development.

[0004] However, the sewage pipe in the prior art usually adopts an inclined U-shaped design, mainly through the curved structure inside the pipe, forming a U-shaped elbow, which plays a role in preventing sewage backflow, ensuring the cleanliness of the bathroom environment to a certain extent, and avoiding the spread of odor and sewage backflow. Although the sewage pipe of this structure has a certain siphon function, it is restricted by structural factors such as the shape and length of the pipe, and its siphon effect is not very ideal. Under a certain pipe length, if the pipe shape is too straight, the liquid flow rate is too fast, and it is difficult to produce a stable vortex; conversely, if the pipe shape is too curved, the liquid flow rate is limited, which is also not conducive to the siphon effect. Due to certain limitations in sewage replacement capacity, most plastic wall sewage pipes need to meet the sewage replacement capacity standards, which requires water consumption of level 2 or 3 water efficiency, and cannot meet the application requirements of level 1 water efficiency urinals, which is not conducive to saving water resources and environmental protection. Utility Model Content

[0005] In order to improve the flushing efficiency, the embodiment of the utility model provides a toilet sewage pipe, which has obvious water-saving effect and meets the application requirements of a level 1 water-efficiency urinal.

[0006] In order to solve the above-mentioned technical problems, an embodiment of the utility model provides a toilet sewage pipe, including a sewage pipe body, wherein the sewage pipe body includes a water inlet joint, a bend pipe and a drain joint, the bend pipe is spirally extended from the outer edge to the center, and the horizontal height of the bend pipe fluctuates along the spiral direction, the end of the bend pipe at the outer edge is connected to the water inlet joint, and the end of the bend pipe at the center is connected to the drain joint.

[0007] As an improvement of the above scheme, the bent pipe includes a falling section, a first U-shaped section, a second U-shaped section and a turning section, the falling section is connected to the first U-shaped section, the second U-shaped section is arranged opposite to the first U-shaped section, and the second U-shaped section is arranged above the first U-shaped section, and the turning section connects the second U-shaped section and the drainage joint.

[0008] As an improvement of the above solution, the falling section is arranged obliquely downward from the water inlet joint, and the slope of the central axis of the falling section gradually increases from top to bottom.

[0009] As an improvement of the above solution, the first U-shaped section includes a first arc tube, and a first straight tube and a second straight tube respectively arranged at two ends of the first arc tube, the second U-shaped section includes a second arc tube, the first straight tube connects the falling section and the first arc tube, the second straight tube connects the first arc tube and the second arc tube, and the second arc tube is connected to the turning section through a third straight tube;

[0010] The first straight tube, the second straight tube and the third straight tube are all arranged vertically.

[0011] As an improvement of the above solution, the central axes of the first U-shaped segment and the second U-shaped segment are both located on the facade.

[0012] As an improvement of the above solution, the drainage joint extends in a horizontal direction, and the central axis of the drainage joint is located on the symmetry plane of the first U-shaped segment.

[0013] As an improvement of the above solution, it further comprises a fixed pipe, the drainage connector extends into the fixed pipe and is sealed with the fixed pipe, and the length of the drainage connector extending into the fixed pipe is adjustable; or

[0014] The fixed connecting pipe extends into the drainage joint and is sealed with the drainage joint. The length of the fixed connecting pipe extending into the drainage joint is adjustable.

[0015] As an improvement of the above-mentioned scheme, the fixed connecting pipe includes a connecting pipe body and a connecting head arranged at one end of the connecting pipe body, the connecting head is provided with an external thread and an interface whose diameter gradually decreases on the side away from the end, the drainage joint extends into the connecting pipe body from the interface, and the drainage joint is provided with a sealing rubber ring and a sleeve, the distance between the outer wall surface of the sealing rubber ring and the drainage joint gradually increases toward the side away from the end of the drainage joint, and the sleeve is locked on the connecting head by an internal thread adapted to the external thread, so that the sealing rubber ring abuts against the circumferential inner wall of the connecting head.

[0016] As an improvement of the above solution, a sealing sheet is further provided on the drainage joint, and opposite sides of the sealing sheet are respectively in contact with the sealing rubber ring and the sleeve.

[0017] As an improvement of the above-mentioned solution, the fixed connecting pipe also includes a boss and a flange formed at the other end of the connecting pipe body, the boss and the connecting pipe body form an assembly opening, the assembly opening is used to accommodate a reserved pipe extending out of the wall, and a threaded sealing ring is provided in the assembly opening and is mounted on the connecting pipe body, and the threaded sealing ring is sealed with the reserved pipe.

[0018] The implementation of this utility model has the following beneficial effects:

[0019] The utility model adopts a spiral siphon pipe as the main body of the sewage pipe of the toilet, wherein the curved pipe is spirally extended from the outer edge to the center, and the horizontal height of the curved pipe fluctuates along the spiral direction. The end of the curved pipe at the outer edge is connected to the water inlet joint, and the end of the curved pipe at the center is connected to the drainage joint. The water flowing in through the water inlet joint is stored at the bottom of the curved pipe, and a vacuum environment is formed in the inner part of the curved pipe. The water inlet joint only needs to flow in a small amount of water again to form a siphon effect.

[0020] The spiral pipe structure extends the pipe length under the premise of the same diameter, thereby increasing the flow path of the flushing water flow and further strengthening the siphon effect;

[0021] In addition, thanks to the spiral shape of the pipe, the internal fluid flows more smoothly and the resistance is reduced. This smaller resistance is conducive to maintaining the fluid speed, thereby achieving a better siphon effect than the existing technology;

[0022] The toilet sewage pipe can discharge sewage efficiently and quickly, reduce the amount of sewage residue in the pipe, thereby improving the replacement capacity, reducing water consumption, and making the urinal meet the first-level water efficiency standard;

[0023] At the same time, the spiral pipe design reduces the length of space occupied, thereby reducing the reserved space for urinal installation. This feature is conducive to optimizing the size design of the urinal. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of an embodiment of a toilet sewage pipe of the utility model;

[0025] Figure 2 yes Figure 1 Side view of

[0026] Figure 3 yes Figure 2 Schematic diagram of the Ⅰ-Ⅰ cross-section structure;

[0027] Figure 4 yes Figure 1 Schematic diagram of the decomposition structure;

[0028] Figure 5 yes Figure 1 A front view of

[0029] Figure 6 When the reserved pipe on the wall is an unconventional pipe Figure 5 Schematic diagram of the II-II cross-sectional structure;

[0030] Figure 7 When the reserved pipe on the wall is a conventional pipe Figure 5 Schematic diagram of the II-II cross-sectional structure;

[0031] Figure 8 yes Figure 7 Schematic diagram of the enlarged structure of part E. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0033] like Figures 1 to 6 The utility model provides an embodiment of a toilet sewage pipe, comprising a U-shaped sealing ring 1 and a sewage pipe body 2, wherein the sewage pipe body 2 comprises a water inlet joint 21, an elbow 22 and a drainage joint 23. The U-shaped sealing ring 1 is installed on the water inlet joint 21, and is used to connect with the sewage outlet of the urinal A. The elbow 22 is spirally extended from the outer edge to the center, and the horizontal height of the elbow 22 fluctuates along the spiral direction. The end of the elbow 22 at the outer edge is connected to the water inlet joint 21, and the end of the elbow 22 at the center is connected to the drainage joint 23.

[0034] The main body of the sewage pipe of the toilet in this embodiment adopts a spiral siphon pipe, and the elbow 22 is spirally extended from the outer edge to the center, and the horizontal height of the elbow 22 fluctuates along the spiral direction. The end of the elbow 22 at the outer edge is connected to the water inlet joint 21, and the end of the elbow 22 at the center is connected to the drainage joint 23. The water flowing in through the water inlet joint 21 exists at the bottom of the elbow 22, and a vacuum environment is formed in the inner part of the elbow 22. The water inlet joint 21 only needs to flow in a small amount of water again to form a siphon effect; the spiral pipe structure extends the pipe length under the premise of the same diameter, thereby increasing the flow of flushing water. path, further strengthening the siphon effect; in addition, thanks to the spiral shape of the pipe, the internal fluid flows more smoothly and the resistance is reduced. This smaller resistance is conducive to maintaining the fluid speed, thereby achieving a better siphon effect than the existing technology; the toilet sewage pipe realizes efficient and rapid discharge of sewage, reduces the residual sewage in the pipe, thereby improving the replacement capacity, reducing water consumption, and enabling the urinal to meet the first-level water efficiency standard; at the same time, the design of the spiral pipe reduces the length of the space occupied, thereby reducing the reserved space for the installation of the urinal. This feature is conducive to optimizing the size design of the urinal.

[0035] like Figure 3 As shown, the elbow 22 of the sewage pipe body 2 of the present embodiment specifically includes a falling section 221, a first U-shaped section 222, a second U-shaped section 223 and a turning section 224, the falling section 221 is connected to the first U-shaped section 222, the second U-shaped section 223 is arranged opposite to the first U-shaped section 222, and the second U-shaped section 223 is arranged above the first U-shaped section 222, and the turning section 224 connects the second U-shaped section 223 and the drainage joint 23.

[0036] The falling section 221 is the first section of the sewage entering the elbow 22 from the water inlet joint 21. It is arranged to be inclined downward from the water inlet joint 21 to ensure that the sewage can flow smoothly underground. The angle between the central axis of the falling section 221 and the horizontal plane is 45 to 90 degrees, and the slope gradually increases from top to bottom. The fluid in the falling section 221 will experience an accelerated falling process with gradually increasing acceleration.

[0037] The first U-shaped section 222, as the core part of the curved tube 22, presents a capital U shape, and specifically includes a first arc tube 222a at the bottom, and a first straight tube 222b and a second straight tube 222c respectively arranged at both ends of the first arc tube 222a. The second U-shaped section 223 specifically includes a second arc tube 223a, the first straight tube 222b connects the falling section 221 and the first arc tube 222a, the second straight tube 222c connects the first arc tube 222a and the second arc tube 223a, and the second arc tube 223a is connected to the turning section 224 through a third straight tube 223b. When the fluid flows through the first U-shaped section 222, the fluid flows at a reduced speed.

[0038] When the fluid passes through the first arc tube 222a, due to the bending of the pipeline, an interaction force is generated between the fluid molecules, and this force reduces the fluid speed. Specifically, the fluid enters the curved section from the straight section in the first arc tube 222a. Due to the effect of inertia, the collision frequency between the fluid molecules increases, resulting in a decrease in the fluid speed. When the fluid enters the second arc tube 223a, due to the short length of the second U-shaped section 223 pipeline, and the horizontal flow channel width increases sharply after entering the second arc tube 223a, the number of collisions between the fluid molecules decreases, and the interaction force between the fluid molecules also decreases accordingly, so that the speed is restored. Finally, the turning section 224, as the tail of the elbow 22, is mainly responsible for changing the flow direction of the fluid, so that the vertical water flow naturally turns to horizontal flow, and is connected to the drain joint 23, providing feasibility for adjusting the length of the pipeline. By adjusting the position of the drain joint 23 in the fixed pipe 6, the length of the entire pipeline system can be fine-tuned to meet the needs of different installation scenarios.

[0039] Among them, in this embodiment, the first straight pipe 222b, the second straight pipe 222c and the third straight pipe 223b are all vertically arranged, the first straight pipe 222b and the second straight pipe 222c are symmetrically arranged, the curvature of the first arc pipe 222a reaches 180°, and it is a semicircular ring, and the curvature of the second arc pipe 223a reaches 180°, and it is a semicircular shape. On the one hand, the first straight pipe 222b, the second straight pipe 222c and the first arc pipe 222a are tangent, and the second straight pipe 222c and the third straight pipe 223b are tangent to the second arc pipe 223a, so that the fluid flow is smoother and the siphon effect is more obvious. On the other hand, the volume of the curved pipe 22 can be reduced as much as possible, and the structure is more compact. In addition, compared with the prior art in which the toilet sewage pipe adopts an inclined U-shaped design, the residual sewage in the pipeline can be reduced, the replacement capacity can be improved, and the water consumption can be reduced.

[0040] The ratio of the pipe radius of the second arc pipe 223a to the outer ring radius of the first arc pipe 222a is preferably 1 / 3 to 2 / 3. In this embodiment, the ratio of the pipe radius of the second arc pipe 223a to the outer ring radius of the first arc pipe 222a is 1:2, which can obtain a better siphon effect and greatly reduce the water consumption of starting the siphon phenomenon.

[0041] In the first U-shaped section 222, there is already water C. When a new water flow flows into the falling section 221, the liquid levels of the first straight tube 222b and the second straight tube 222c of the first U-shaped section 222 gradually rise, and the pressure in the pipeline gradually increases during the rising process of the liquid level. When the pressure in the pipeline increases to a certain extent, the liquid in the first U-shaped section 222 undergoes a siphon phenomenon, flows upward along the pipeline, and absorbs the new water flow that continues to flow into the falling section 221 into the second U-shaped section 223. The siphon effect enables the liquid to be stably transmitted in the pipeline, avoiding the problem of liquid backflow. The unique design of the elbow 22 reduces the flow rate of the siphon effect in the first U-shaped section 222, which is not only conducive to reducing the friction loss of the fluid and improving the transmission efficiency, but also reduces energy loss, making the entire sewage discharge process more efficient and energy-saving. The design of the sewage pipe body 2 is to reduce the residual amount of sewage in the pipeline, thereby improving the replacement capacity. At the same time, only a small amount of new water flow needs to flow in to trigger the siphon effect of the toilet sewage pipe, reducing the water consumption, so that the urinal A meets the level 1 water efficiency standard. In addition, the spiral pipe design effectively suppresses the spread of odor and sewage backflow, and has excellent anti-odor performance.

[0042] The central axes of the first U-shaped section 222 and the second U-shaped section 223 are both on the vertical plane, so that the overall length of the toilet sewage pipe is reduced, making it more compact. Therefore, the required installation space is correspondingly reduced, which helps to reduce the installation reserved space of the urinal or provide more space for other accessories. This feature helps to optimize the size design of the urinal.

[0043] The drainage joint 23 extends in the horizontal direction, and the central axis of the drainage joint 23 is located on the symmetry plane of the first U-shaped section 222, so that the transverse dimension of the sewage pipe body 2 is more compact.

[0044] The pipe cross section of the elbow 22 of the present embodiment can be circular, and the cross-sectional area is equal at each place. However, this design is not unique, and a racetrack shape or other shapes can also be selected. At the same time, the design of a variable diameter pipe is also available.

[0045] The end of the wall drainage pipe in the prior art is directly inserted into the pipe reserved on the wall during the installation process. However, the length of the toilet sewage pipe in the prior art is fixed, and a longer length is usually preset during the design. During the installation process, the excess part is cut off according to the actual requirements of the urinal size. The operation process is relatively cumbersome, and there is an irregularity in the diameter of the end of the wall drainage pipe. If the diameter is too large or too small, it will cause installation difficulties and poor sealing performance.

[0046] refer to Figure 4 In order to adjust the length of the toilet sewage pipe and adapt to the assembly of urinals of various sizes, the toilet sewage pipe of this embodiment is designed as a double sleeve design. Specifically, the toilet sewage pipe of this embodiment also includes a fixed pipe 6 that is sealed and connected to the drainage joint 23 of the sewage pipe body 2. The end of the drainage joint 23 of this embodiment is provided with a wedge-shaped opening, which can play a guiding role and facilitate the drainage joint 23 to extend into the fixed pipe 6. By moving the sewage pipe body 2, the drainage joint 23 slides relative to the fixed pipe 6, and the length of the drainage joint 23 extending into the fixed pipe 6 is adjusted, so as to adjust the length of the toilet sewage pipe. During the installation process, there is no need to measure the size and cut the pipe, thereby simplifying the installation process, avoiding installation errors, and making the installation of the urinal sewage pipe more convenient.

[0047] Specifically, refer to Figures 5 to 8 The fixed pipe 6 of this embodiment includes a connector 61 and a pipe body 62, and the connector 61 is arranged at one end of the pipe body 62. The connector 61 is provided with an external thread, and the sewage pipe body 2 and the fixed pipe 6 are tightly locked with the connector 61 through a sleeve 3 with an internal thread to ensure a stable connection. The connector 61 is also provided with an interface whose diameter gradually decreases on the side away from the end, that is, the interface is open to the outside, and the drainage joint 23 extends into the pipe body 62 through the interface. The sleeve 3 is arranged on the drainage joint 23, and the drainage joint 23 is also provided with a sealing rubber ring 5. The distance between the outer wall surface of the sealing rubber ring 5 and the drainage joint 23 gradually increases toward the side away from the end of the drainage joint 23. The sleeve 3 is locked on the connector 61 through an internal thread adapted to the external thread, so that the sealing rubber ring 5 abuts against the inner wall of the circumferential direction of the connector 61. The sleeve 3 tightly wraps the connector 61, the sealing sheet 4 and the sealing rubber ring 5, and achieves a firm locking through a threaded connection, thereby ensuring an excellent sealing effect. The inner surface of the connector 61 and the outer surface of the sealing rubber ring 5 are designed as matching bevels, which improves the convenience of installation and can also ensure the safety and stability of the connector. With the cooperation of the bevel design, the connector 61 can better adapt to the deformation of the sealing rubber ring 5 and always maintain a good sealing effect. In addition, this design makes the root of the connector 61 connected to the pipe body 62 relatively thick, thereby avoiding the risk of breakage.

[0048] The sealing rubber ring 5 of this embodiment is made of soft rubber, has good flexibility and elasticity, and achieves interference fit with the drainage joint 23 and the connector 61. During installation, the sealing rubber ring 5 can withstand extrusion and rebound, tightly connect the drainage joint 23 and the connector 61, and effectively prevent leakage of liquid or other substances.

[0049] In addition, a sealing sheet 4 is provided on the drainage joint 23, and opposite sides of the sealing sheet 4 are respectively in contact with the sealing rubber ring 5 and the sleeve 3 to ensure the sealing performance of the toilet sewage pipe and prevent leakage at the connection part.

[0050] In this embodiment, the wedge-shaped opening at the end of the drain joint 23 protrudes toward the outer wall of the drain joint 23, which can prevent the sealing rubber ring 5 and the sealing sheet 4 from slipping out of the drain joint 23, thereby achieving position limiting and ensuring the effectiveness of the seal.

[0051] In addition to the toilet sewage pipe connection method given in this embodiment, the fixed connecting pipe of the toilet sewage pipe can also be arranged to extend into the drainage joint and be sealed with the drainage joint. The length of the fixed connecting pipe extending into the drainage joint is adjustable.

[0052] Existing plastic toilet sewage pipes generally design the pipe and flange separately, and the two exist independently. During the installation process, first use wood screws to firmly fix the flange to the wall, then pass the toilet sewage pipe through the hole in the center of the flange and connect it to the pipe reserved on the wall. To ensure that leakage is prevented, glass glue is usually applied to the back of the flange, inside the hole, and on the outer surface of the toilet sewage pipe to enhance the sealing performance. Glass glue has excellent bonding properties and good corrosion resistance, and is easy to construct, but the curing cycle is relatively long. It takes some time to achieve the expected bonding effect, and it is difficult to remove after curing. In a humid environment, glass glue easily absorbs moisture, thereby reducing the bonding force. The elasticity is relatively weak and it is easy to break when subjected to external force.

[0053] In order to facilitate the connection between the toilet sewage pipe and the reserved pipe B on the wall D, the flange 64 and the pipe body 62 on the fixed pipe 6 are integrated into an integral structure. A connector 61 is formed at one end of the pipe body 62, and a boss 63 is formed at the other end in addition to the flange 64. The end of the pipe body 62 is flush with the end of the boss. The boss 63 and the pipe body 62 form an annular assembly opening that opens to the end of the pipe body 62. The assembly opening is used to accommodate the reserved pipe B extending out of the wall D. A threaded sealing ring 7 is provided in the assembly opening and is fitted on the end of the pipe body 62. The threaded sealing ring 7 is sealed with the reserved pipe B. The fixed pipe and flange of the toilet sewage pipe are designed as an integrated structure. The end of the fixed pipe is equipped with a threaded sealing ring 7, which is more tightly connected to the reserved pipe B on the wall, thereby improving the sealing performance.

[0054] Since the threaded sealing ring 7 is made of a material with good elasticity and tensile strength, it is more tightly connected to the wall reserved pipe B reserved on the wall D, so that the pipe can produce a certain deformation when subjected to external force without destroying the stability of the connection, thereby improving the sealing performance. In addition, the elastic connection can make the tolerance range of the pipe diameter of the pipe body 622 wider, avoiding the problem of installation difficulties and poor sealing performance caused by excessive or too small pipe diameter, and can still maintain the stability and sealing performance of the connection when the pipe diameter changes to a certain extent.

[0055] During assembly, the threaded sealing ring 7 is sleeved on the end of the pipe body 62, and then it is inserted into the reserved wall pipe B, and the fixed pipe 6 is firmly fixed on the wall D by combining the cross wood screw 8 with the expansion glue particles 9. No glass glue is needed during the assembly process, which shortens the assembly cycle.

[0056] The specific wall installation process of the fixed pipe 6 is as follows: after drilling a hole in the wall D, embed the expansion rubber particles 9 into the hole, and after positioning the fixed pipe 6, pass the cross wood screw 8 through the screw hole 641 on the flange 64, and finally tighten the cross wood screw 8 to ensure firmness.

[0057] In general, the reserved pipe B on the wall will extend outside the wall, such as Figure 7 The conventional pipe B1 shown in the figure can achieve the sealing effect by using glass glue sealing and the structure of this embodiment under such installation conditions. However, in some cases, such as Figure 6 The unconventional pipe B2 shown is only equipped with an elbow, and no extra straight pipe is reserved, so the sealing effect of glass glue cannot be guaranteed. In this embodiment, due to the provision of the concave mounting boss 63, the formed annular assembly opening has sufficient space to accommodate the threaded sealing ring 7 inside which can connect the straight pipe, thereby still maintaining good sealing performance.

[0058] This embodiment uses a threaded sealing ring 7 for sealing, which simplifies the installation process. Compared with the glass glue sealing method used in the prior art, this embodiment does not require complicated processing, and only needs to install the sealing ring to the corresponding position to achieve an excellent sealing effect. This greatly shortens the installation time and improves work efficiency. The sealing ring has excellent elasticity and pressure resistance, which can effectively prevent the leakage of liquids, gases and other substances, ensuring the safe and stable use of the urinal. At the same time, the material of the sealing ring has good wear resistance, corrosion resistance and high temperature resistance, so that it can still maintain a long service life in harsh environments.

[0059] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A toilet sewage pipe, characterized in that: The sewage pipe body includes a water inlet joint, an elbow and a drainage joint, wherein the elbow is spirally extended from the outer edge to the center, and the horizontal height of the elbow fluctuates along the spiral direction, and the end of the elbow at the outer edge is connected to the water inlet joint, and the end of the elbow at the center is connected to the drainage joint; The bent pipe includes a falling section, a first U-shaped section, a second U-shaped section and a turning section, the falling section is connected to the first U-shaped section, the second U-shaped section is arranged opposite to the first U-shaped section, and the second U-shaped section is arranged above the first U-shaped section, and the turning section connects the second U-shaped section and the drainage joint.

2. The toilet sewage pipe according to claim 1, characterized in that: The falling section is arranged obliquely downward from the water inlet joint, and the slope of the central axis of the falling section gradually increases from top to bottom.

3. The toilet sewage pipe according to claim 1 or 2, characterized in that: The first U-shaped section includes a first arc tube, and a first straight tube and a second straight tube respectively arranged at two ends of the first arc tube, the second U-shaped section includes a second arc tube, the first straight tube connects the falling section and the first arc tube, the second straight tube connects the first arc tube and the second arc tube, and the second arc tube is connected to the turning section through a third straight tube; The first straight tube, the second straight tube and the third straight tube are all arranged vertically.

4. The toilet sewage pipe according to claim 1 or 2, characterized in that: Central axes of the first U-shaped segment and the second U-shaped segment are both located on the facade.

5. The toilet sewage pipe according to claim 1 or 2, characterized in that: The drainage joint extends in a horizontal direction, and a central axis of the drainage joint is located on a symmetry plane of the first U-shaped segment.

6. The toilet sewage pipe according to claim 1, characterized in that: It also includes a fixed pipe, the drainage connector extends into the fixed pipe and is sealed with the fixed pipe, and the length of the drainage connector extending into the fixed pipe is adjustable; or The fixed connecting pipe extends into the drainage joint and is sealed with the drainage joint. The length of the fixed connecting pipe extending into the drainage joint is adjustable.

7. The toilet sewage pipe according to claim 6, characterized in that: The fixed connecting pipe includes a connecting pipe body and a connecting head arranged at one end of the connecting pipe body, the connecting head is provided with an external thread and an interface whose diameter gradually decreases on the side away from the end, the drainage joint extends into the connecting pipe body through the interface, and the drainage joint is provided with a sealing rubber ring and a sleeve, the distance between the outer wall surface of the sealing rubber ring and the drainage joint gradually increases toward the side away from the end of the drainage joint, and the sleeve is locked on the connecting head by an internal thread adapted to the external thread, so that the sealing rubber ring abuts against the circumferential inner wall of the connecting head.

8. The toilet sewage pipe according to claim 7, characterized in that: The drainage joint is also provided with a sealing sheet, and opposite sides of the sealing sheet are respectively in contact with the sealing rubber ring and the sleeve.

9. The toilet sewage pipe according to claim 7, characterized in that: The fixed connecting pipe also includes a boss and a flange formed at the other end of the connecting pipe body, the boss and the connecting pipe body form an assembly opening, the assembly opening is used to accommodate a reserved pipe extending out of the wall, and a threaded sealing ring is provided in the assembly opening and is sleeved on the connecting pipe body, and the threaded sealing ring is sealed with the reserved pipe.

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