Indoor drainage pipeline structure

Abstract

The utility model relates to the technical field of drainage pipes, and particularly discloses an indoor drainage pipeline structure which comprises a sleeve laid on the outer side, a combined pipe arranged in the inner side of the sleeve, connecting pieces installed at the two ends of the sleeve and used for combined connection, and butt joints connected with the two ends of the combined pipe in a sleeved mode and used for sealing. The casing pipe comprises an outer pipe body, positioning holes and positioning grooves are formed in the two ends of the outer pipe body, and the positioning holes and the positioning grooves are arranged at intervals. The combined pipe comprises an inner pipe body, the diameter of the inner pipe body is smaller than that of an outer pipe body, one or more ribs are arranged on the outer side of the inner pipe body in an annular array around the central axis, and the ribs make contact with the inner wall of the outer pipe body. Through the combination of the connecting piece, the combined pipe and the sleeve, the sleeve and the combined pipe can be combined together during use, and the butt joint is matched, so that the noise in the pipeline can be reduced during use.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage pipes, in particular to an indoor drainage pipeline structure. Background Art

[0002] Interior drains are typically pipes used to carry wastewater generated within a home or commercial building to an outside drainage system;

[0003] The most common ones are the sewer pipes in the balcony or bathroom. Generally, there is a sound of water hitting the inner wall when draining. The reason is generally due to the pipe material and the drainage rate. Therefore, sound-proof cotton will be wrapped on the outside during decoration. However, there are still various noise problems under the impact of water flow, and the pipe is a single-layer design. Once the outside is bumped and damaged, it is likely to cause hidden leakage points. Based on this, it needs to be improved. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides an indoor drainage pipe structure, which solves the problem that the pipe is designed in a single layer in the prior art and there is no noise suppression in installation and connection.

[0005] The indoor drainage pipe structure of the utility model comprises a sleeve pipe laid on the outside, a combined pipe arranged inside the sleeve pipe, connectors installed at both ends of the sleeve pipe for combined connection, and butt joints sleeved with both ends of the combined pipe for sealing;

[0006] The sleeve comprises an outer tube body, both ends of the outer tube body are provided with positioning holes and positioning grooves, and the positioning holes and positioning grooves are arranged at intervals;

[0007] The combined tube comprises an inner tube body, the diameter of the inner tube body is smaller than the diameter of the outer tube body, one or more ribs are arranged on the outer side of the inner tube body in a circular array with a central axis, and the ribs are in contact with the inner wall of the outer tube body.

[0008] As a further improvement of the utility model, a strip groove is provided on the outer side of the rib, and a rubber sheet is embedded in the strip groove to reduce the impact vibration of the water flow.

[0009] As a further improvement of the present invention, the connecting piece is arranged at one end of the sleeve, and the connecting piece includes a collar, and the inner side of the collar is adapted to the one end of the sleeve.

[0010] As a further improvement of the utility model, an inner convex ring is provided in the inner middle part of the ring, and docking protrusions adapted to the positioning holes and positioning grooves provided at the end of the sleeve are provided on both sides of the inner convex ring for docking with the sleeve.

[0011] As a further improvement of the present invention, an internal thread is provided on the inner side of the collar, and the internal thread is matched with a thread tightening area provided on the outer side of the sleeve end, so as to fix the sleeve.

[0012] As a further improvement of the utility model, there are at least two docking joints, whose cross-section is trapezoidal, and one or more grooves are arranged on the outside of the docking joints. The grooves are provided with sealing rings for sealing and adapting the docking joints to the inner side of the outer tube body of the sleeve.

[0013] As a further improvement of the utility model, a sleeve area is provided on the inner side of the butt joint, and the sleeve area is plug-connected with the end of the inner tube body of the combined tube for fixing the inner tube body to the inner middle part of the outer tube body.

[0014] As a further improvement of the utility model, the ribs arranged on the outer side of the inner tube body are smaller than the length of the inner tube body, the two ends of the inner tube body are located at the ends of the ribs and contact the docking joint, and the two ends of the ribs conflict with the bottom of the docking joint.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model can combine the sleeve and the combined pipe together through the combination of the connecting piece, the combined pipe and the sleeve, so that the sleeve and the combined pipe can be combined together when in use, and then cooperate with the provided butt joint to reduce the noise inside the pipeline when in use;

[0017] Moreover, when in use, ribs are provided on the outside of the combined pipe, and strip grooves are opened on the outside of the ribs. At this time, the rubber sheet installed on the strip groove not only plays a role in increasing the friction for positioning the combined pipe, but also when in use, the gap formed by the combination of the combined pipe and the sleeve can be filled by the rubber sheet. In combination with the butt joint, the stability of the connection between the pipes can be improved, the noise can be reduced, and the use effect can be improved. The double-layer pipe design can also provide convenience for later maintenance and reduce the appearance of hidden water outlets. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the casing, connector, combined pipe and butt joint combination of the utility model;

[0020] Figure 2 It is a schematic diagram of the three-dimensional front view structure of the casing, connecting piece, combined pipe and butt joint combination of the utility model;

[0021] Figure 3 This is a schematic diagram of the front view structure of the sleeve and connector combination of the utility model;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the combination of the sleeve, the connector, the combined pipe and the butt joint of the utility model from another angle;

[0023] Figure 5 It is a schematic diagram of the vertical front view structure of the casing, connector, combined pipe and butt joint combination of the utility model;

[0024] Figure 6 For this utility model Figure 5 Schematic diagram of the AA section structure;

[0025] Figure 7 This is a schematic diagram of the front view of one end of the casing, connector, combined pipe and butt joint combination of the utility model;

[0026] Figure 8 This is a schematic diagram of the front view of the other end of the casing, connector, combined pipe and butt joint combination of the utility model;

[0027] Fig. 9 For this utility model Figure 4 The enlarged structural diagram at A in the middle;

[0028] Fig.10 For this utility model Figure 6 Enlarged structural diagram at B in the middle.

[0029] In the figure: 1, casing; 2, connecting piece; 3, combined pipe; 4, butt joint;

[0030] 11. outer tube body; 12. positioning hole; 13. positioning groove; 14. thread tightening area;

[0031] 21. collar; 22. inner convex ring; 23. internal thread; 24. docking convex block;

[0032] 31. ribs; 32. inner tube body; 33. strip grooves;

[0033] 41. Sealing ring; 42. Socket area. DETAILED DESCRIPTION

[0034] The following will disclose multiple embodiments of the utility model with diagrams. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the utility model. In other words, in some embodiments of the utility model, these physical details are not necessary. In addition, for the purpose of simplifying the diagram, some conventional structures and components will be depicted in a simple schematic manner in the diagram.

[0035] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] Please participate Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 as well as Figure 8 , indoor drains are usually pipes used to carry wastewater generated within a home or commercial building to an outside drainage system;

[0037] The most common ones are the sewer pipes at the balcony or bathroom. Generally, when the water is discharged, it is easy to make a sound of water hitting the inner wall. The reason is generally caused by the pipe material and the speed of the water discharge. Therefore, during decoration, the outer side is wrapped with silent cotton, but there are still various noise problems under the impact of the water flow, and the pipe is a single-layer design. Once the outer side is damaged by collision, it is very likely to cause a hidden leakage point. Based on this, the present application provides an indoor drainage pipe structure, including a sleeve 1 laid on the outside, a combined pipe 3 arranged on the inner side of the sleeve 1, and a connector 2 installed at both ends of the sleeve 1 for combined connection, and a butt joint 4 sleeved with both ends of the combined pipe 3 for sealing;

[0038] The sleeve 1 comprises an outer tube body 11, both ends of the outer tube body 11 are provided with positioning holes 12 and positioning grooves 13, and the positioning holes 12 and the positioning grooves 13 are arranged at intervals;

[0039] The combined tube 3 includes an inner tube body 32 , the diameter of which is smaller than that of the outer tube body 11 , and one or more ribs 31 are arranged on the outer side of the inner tube body 32 in a circular array around the central axis, and the ribs 31 are in contact with the inner wall of the outer tube body 11 .

[0040] The outer tube body 11 is usually made of durable plastic or metal and plays a role of protection and support.

[0041] Positioning holes 12 and positioning grooves 13 are provided at both ends of the outer tube body 11, and these positioning holes 12 and grooves are arranged at intervals. The positioning holes 12 are used to engage the butt joint 4 or the connector 2 of the combined tube 3 to ensure that the sleeve 1 is stable during the connection process; the positioning grooves 13 are used to fix the combined tube 3 and prevent it from moving or rotating in the sleeve 1.

[0042] The inner tube body 32 has a smaller diameter than the pipe portion of the outer tube body 11 and is installed in the casing 1 . The inner tube body 32 is designed so that it can run smoothly inside the casing 1 and will not directly contact the outer tube body 11 .

[0043] One or more ribs 31 are evenly arranged on the outside of the inner tube body 32. These ribs 31 are arranged in a ring shape based on the central axis. The function of the ribs 31 is to increase the rigidity and strength of the inner tube body 32, and at the same time form a support point so that the inner tube body 32 contacts the inner wall of the outer tube body 11, further enhancing the stability of the pipeline.

[0044] Connectors 2 are provided at both ends of the casing 1 to connect two casing 1 sections or other pipeline components together. The connectors 2 ensure the continuity and stability of the pipeline.

[0045] The butt joints 4 are installed at both ends of the combined pipe 3 and closely match the inner wall of the sleeve 1 to provide a sealing effect to prevent water leakage or air penetration. The design of the butt joints 4 ensures the sealing between the combined pipe 3 and the sleeve 1.

[0046] Implementation steps:

[0047] The outer tube body 11 is laid to the designated position according to the design requirements to ensure that the positioning holes 12 and the positioning grooves 13 are positioned accurately.

[0048] Insert the inner tube body 32 into the sleeve 1, make it contact with the inner wall of the sleeve 1, and ensure that the ribs 31 are evenly distributed in the pipe. The design of the ribs 31 should form a suitable match with the contact surface of the inner wall of the sleeve 1 to reduce noise and vibration.

[0049] Use the connector 2 to connect the two ends of the sleeve 1 to other pipeline components to ensure the continuity and stability of the pipeline.

[0050] The butt joints 4 are installed to both ends of the combined pipe 3 to ensure sealing fit with the inner wall of the sleeve 1 .

[0051] Due to the contact between the ribs 31 and the inner wall of the sleeve 1, the direct impact of the water flow on the pipe wall is reduced, thereby reducing noise. The rubber sheet and double-layer pipe design further suppress noise. The design of the positioning hole 12 and the positioning groove 13 ensures the stable connection between the sleeve 1 and the combined pipe 3, avoiding the possible movement or vibration of the pipe during use. The double-layer pipe structure increases the overall strength and durability of the pipeline system, reduces hidden leakage points caused by bumps or external forces, and the sealing design of the joint 4 effectively prevents leakage problems, improves the overall sealing of the pipeline system, and reduces the risk of maintenance and leakage. The double-layer design makes the later maintenance work more convenient because it is easier to check and replace internal components without disassembling the entire system.

[0052] Please participate Figure 1 , Figure 2 , Figure 4 , Figure 5 , Fig. 9 as well as Fig.10 A strip groove 33 is provided on the outer side of the rib 31, and a rubber sheet is embedded in the strip groove 33 to reduce the impact vibration of the water flow.

[0053] Strip grooves 33 are provided on the outside of the ribs 31 of the inner tube body 32, and these grooves are distributed along the length direction of the ribs 31. The strip grooves 33 are designed to accommodate the rubber sheet and provide a groove structure for fixing the rubber sheet. The rubber sheet is embedded in the strip grooves 33 and is usually made of soft and elastic rubber material. The thickness and hardness of the rubber sheet can be adjusted according to specific usage requirements. The rubber sheet is usually installed in the strip grooves 33 by pressing, bonding or other methods to ensure that the rubber sheet can be firmly fixed in the groove and is not easy to fall off or shift.

[0054] The role of the rubber sheet in the strip groove 33 is to absorb and reduce the impact vibration of the water flow on the inner tube body 32. When the water flows through the pipe, the rubber sheet can effectively buffer the impact force of the water flow, thereby reducing the direct effect of the water flow on the inner wall of the pipe.

[0055] Due to the elasticity and softness of the rubber sheet, the noise caused by the water flow can be significantly reduced. This shock absorption effect helps to create a quieter indoor environment. The role of the rubber sheet in the strip groove 33 also includes providing additional sealing performance to prevent water or gas from leaking from the pipe gap. The enhanced sealing performance can effectively reduce the problem of water leakage or air infiltration. The presence of the rubber sheet not only provides a shock absorption effect, but also increases the stability of the inner pipe body 32 through contact with the outer pipe body 11. This can prevent the pipe from being displaced or vibrated during use, thereby improving the overall stability of the system. The rubber sheet's mitigation effect on the impact of water flow helps to reduce the wear and damage of the pipe in long-term use, thereby extending the overall service life of the pipe system.

[0056] Please participate Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 as well as Fig.10 The connecting member 2 is arranged at one end of the sleeve 1 , and the connecting member 2 includes a collar 21 , and the inner side of the collar 21 is adapted to one end of the sleeve 1 .

[0057] An inner convex ring 22 is provided at the inner middle of the collar 21 , and docking protrusions 24 matching the positioning holes 12 and the positioning grooves 13 provided at the end of the sleeve 1 are provided on both sides of the inner convex ring 22 for docking with the sleeve 1 .

[0058] An internal thread 23 is provided on the inner side of the collar 21 , and the internal thread 23 is matched with a thread tightening area 14 provided on the outer side of the end of the sleeve 1 , so as to fix the sleeve 1 .

[0059] The connector 2 is installed at one end of the casing 1 and is responsible for connecting the casing 1 to other pipelines or equipment.

[0060] The collar 21 is a part of the connector 2, and the inner side thereof is adapted to one end of the sleeve 1. The design of the collar 21 ensures good matching and fixation between the connector 2 and the sleeve 1.

[0061] The convex ring located at the middle of the inner side of the collar 21 plays a role in fixing and docking. The convex ring helps to position and align the sleeve 1 and the connector 2.

[0062] The inner convex ring 22 is provided with butt joint protrusions 24 on both sides, which are matched with the positioning holes 12 and the positioning grooves 13 at the end of the sleeve 1. The butt joint protrusions 24 ensure the stable butt joint between the collar 21 and the sleeve 1 to prevent displacement or rotation.

[0063] The inner side of the collar 21 is provided with threads, which are matched with the threaded tightening area 14 on the outer side of the end of the sleeve 1. The threaded connection is used to fix the sleeve 1 and provide a stable connection mode.

[0064] The threaded tightening area 14 on the outer side of the end of the sleeve 1 cooperates with the internal thread 23 of the collar 21 to achieve a stable connection through a rotation operation.

[0065] The collar 21 is mounted on one end of the sleeve 1 , ensuring that the convex ring and the docking protrusion 24 on the inner side of the collar 21 are properly docked with the positioning hole 12 and the groove at the end of the sleeve 1 .

[0066] First, the connector 2 is butted against the end of the sleeve 1 , ensuring that the inner convex ring 22 and the butt protrusion 24 are tightly matched with the positioning hole 12 and the groove at the end of the sleeve 1 .

[0067] Then, the threaded tightening area 14 is used to rotate the inner thread 23 of the collar 21 to match the outer threaded tightening area 14 of the sleeve 1 to fix the connection between the collar 21 and the sleeve 1.

[0068] Finally, after the connection is completed, check the stability between the connector 2 and the sleeve 1 to ensure that there is no looseness, the connection is firm and the seal is good.

[0069] The butt joint protrusion 24 is tightly matched with the positioning hole 12 and the groove of the sleeve 1 to ensure stable butt joint between the connector 2 and the sleeve 1. This design can prevent displacement or rotation of the connection and improve the stability of the pipeline system.

[0070] A stable and reliable fixing method is provided by the cooperation between the internal thread 23 and the thread tightening area 14. This threaded connection makes the connection between the sleeve 1 and the connector 2 more stable and avoids loosening due to external force.

[0071] The design of the inner convex ring 22 and the docking protrusion 24 not only provides structural docking support, but also enhances the sealing of the connection and reduces the risk of water leakage.

[0072] The design of the inner convex ring 22 and the docking protrusion 24 ensures the precise docking between the components, making the assembly of the pipeline system more accurate and reducing the problems caused by assembly errors.

[0073] The threaded connection design allows the piping system to be easily disassembled and reassembled, making subsequent maintenance and overhaul work easier.

[0074] By connecting the butt protrusion 24 and the threaded connection, the sealing effect of the connection part is enhanced, the risk of water leakage is reduced, and the overall reliability of the system is improved.

[0075] Please participate Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 There are at least two butt joints 4, whose cross-section is trapezoidal. One or more grooves are arranged on the outside of the butt joint 4, and a sealing ring 41 is sleeved on the groove to seal and fit the butt joint 4 with the inner side of the outer tube body 11 of the sleeve 1.

[0076] A sleeve area 42 is provided on the inner side of the joint 4 , and the sleeve area 42 is plug-connected with the end of the inner tube body 32 of the combined tube 3 , so as to fix the inner tube body 32 to the inner middle part of the outer tube body 11 .

[0077] The rib 31 disposed outside the inner tube body 32 is smaller than the length of the inner tube body 32 , and both ends of the inner tube body 32 are located at the ends of the rib 31 and contact the docking head 4 , and both ends of the rib 31 are in conflict with the bottom of the docking head 4 .

[0078] There are at least two butt joints 4, and the cross section is trapezoidal. The trapezoidal design enables the butt joints 4 to better meet the connection requirements of the pipelines and provide good structural support.

[0079] One or more slots are provided on the outside of the butt joint 4. A sealing ring 41 is sleeved in each slot for sealing and adapting the butt joint 4 to the inside of the outer tube body 11 of the sleeve 1. This design ensures that the butt joint 4 can fit tightly during installation and effectively prevents leakage.

[0080] The inner side of the butt joint 4 is provided with a sleeve area 42, which is used for plugging and connecting with the end of the inner tube body 32 of the combined tube 3. The design of the sleeve area 42 ensures that the inner tube body 32 can be firmly fixed to the inner middle part of the outer tube body 11, thereby stably supporting the combined tube 3.

[0081] The length of the ribs 31 arranged on the outer side of the inner tube body 32 is less than the total length of the inner tube body 32. The ribs 31 mainly play the role of supporting and increasing friction.

[0082] The two ends of the inner tube body 32 are located at the ends of the ribs 31 and contact the butt joint 4. The two ends of the ribs 31 collide with the bottom of the butt joint 4. Such a design can ensure the stable position of the inner tube body 32 in the butt joint 4 and reduce the impact and vibration of the water flow on the pipeline.

[0083] First, the sealing ring 41 is sleeved on the outer groove of the docking head 4 to ensure that the sealing ring 41 is completely wrapped in the groove.

[0084] Then, the trapezoidal cross-section of the butt joint 4 is aligned with the inner side of the outer tube body 11 of the sleeve 1 to ensure the sealing fit between the butt joint 4 and the sleeve 1 .

[0085] Then the end of the inner tube body 32 of the combined tube 3 is inserted into the sleeve area 42 of the joint 4. Ensure that the end of the inner tube body 32 is firmly inserted into the sleeve area 42, thereby fixing the inner tube body 32 to the inner middle part of the outer tube body 11.

[0086] Finally, ensure that the two ends of the ribs 31 of the inner tube body 32 are in contact with the bottom of the butt joint 4. Check whether the length of the ribs 31 is appropriate to ensure that it can effectively contact the butt joint 4 and provide necessary support, and ensure that the sealing ring 41 is completely fitted in the slot to prevent water leakage or gas penetration. Confirm that the connection between the butt joint 4 and the sleeve 1 is firm to avoid looseness at the connection.

[0087] The sealing ring 41 arranged at the groove can effectively seal and fit with the inner side of the outer tube body 11 of the sleeve 1, reducing the risk of water leakage or gas penetration and improving the sealing of the pipeline system. The trapezoidal cross-section joint 4 design provides a stable connection support, ensuring the stability of the pipeline system at the connection and preventing the pipeline from loosening due to external force or vibration.

[0088] The sleeve area 42 of the joint 4 ensures that the end of the inner tube body 32 of the combined tube 3 can be firmly fixed to the inner middle part of the outer tube body 11, thereby improving the stability and reliability of the pipeline system.

[0089] The ribs 31 on the inner tube body 32 are designed to reduce the impact and vibration of the water flow on the inner wall of the pipe. The two ends of the ribs 31 collide with the bottom of the butt joint 4, which can effectively disperse the impact force of the water flow, thereby reducing noise.

[0090] The trapezoidal design of the joint 4 and the length setting of the rib 31 ensure the precise docking between the components, making the assembly of the pipeline system more accurate and reducing assembly errors. The sealing design and fixing method of the joint 4 and the sleeve 1 make the subsequent disassembly and maintenance work more convenient, thereby improving the maintenance efficiency of the system.

[0091] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. An indoor drainage pipe structure, comprising a casing (1) laid on the outside, a combined pipe (3) arranged inside the casing (1), connectors (2) installed at both ends of the casing (1) for combined connection, and a butt joint (4) sleeved with both ends of the combined pipe (3) for sealing; Features: The sleeve (1) comprises an outer tube body (11), both ends of the outer tube body (11) are provided with positioning holes (12) and positioning grooves (13), and the positioning holes (12) and the positioning grooves (13) are arranged at intervals; The combined tube (3) comprises an inner tube body (32), the diameter of the inner tube body (32) being smaller than the diameter of the outer tube body (11), one or more ribs (31) being arranged on the outer side of the inner tube body (32) in a circular array around the central axis, the ribs (31) being in contact with the inner wall of the outer tube body (11).

2. An indoor drainage pipe structure according to claim 1, characterized in that: A strip groove (33) is provided on the outer side of the rib (31), and a rubber sheet is embedded in the strip groove (33) to reduce the impact vibration of the water flow.

3. An indoor drainage pipe structure according to claim 1, characterized in that: The connecting piece (2) is arranged at one end of the sleeve (1), and the connecting piece (2) comprises a collar (21), the inner side of the collar (21) being adapted to one end of the sleeve (1).

4. An indoor drainage pipe structure according to claim 3, characterized in that: An inner convex ring (22) is provided at the inner middle portion of the collar (21), and docking protrusions (24) adapted to the positioning holes (12) and positioning grooves (13) provided at the end of the sleeve (1) are provided on both sides of the inner convex ring (22) for docking with the sleeve (1).

5. An indoor drainage pipe structure according to claim 3, characterized in that: An internal thread (23) is provided on the inner side of the collar (21), and the internal thread (23) is adapted to a thread tightening area (14) provided on the outer side of the end of the sleeve (1) for fixing the sleeve (1).

6. An indoor drainage pipe structure according to claim 1, characterized in that: There are at least two butt joints (4) whose cross-section is arranged in a trapezoidal shape. One or more grooves are arranged on the outside of the butt joints (4). A sealing ring (41) is sleeved on the groove to seal and fit the butt joint (4) with the inside of the outer tube body (11) of the sleeve (1).

7. An indoor drainage pipe structure according to claim 1, characterized in that: The inner side of the butt joint (4) is provided with a sleeve area (42), which is plug-connected with the end of the inner tube body (32) of the combined tube (3) and is used to fix the inner tube body (32) to the inner middle part of the outer tube body (11).

8. An indoor drainage pipe structure according to claim 7, characterized in that: The rib (31) arranged on the outer side of the inner tube body (32) is smaller than the length of the inner tube body (32), and the two ends of the inner tube body (32) are located at the ends of the rib (31) and contact the docking joint (4), and the two ends of the rib (31) are in conflict with the bottom of the docking joint (4).

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