Drainage pipeline connecting structure

Abstract

The utility model relates to the technical field of medical auxiliary instruments, in particular to a drainage pipeline connecting structure which comprises a connecting pipe fixedly communicated with a drainage bottle, a fixing ring is fixedly connected to the feeding end of the connecting pipe in a sleeved mode, an elastic washer is tightly attached to the outer side wall, away from the connecting pipe, of the fixing ring, and a deep pipe is fixedly arranged in the elastic washer in a sleeved mode. One end of the deep pipe penetrates into the connecting pipe, the outer side wall of the deep pipe is in sliding fit with the inner side wall of the connecting pipe, the other end of the deep pipe is integrally communicated with a drainage pipe, the outer sides of the elastic gasket and the fixing ring are symmetrically sleeved with two arc-shaped clamping sleeves, and outer threads are arranged on the outer side walls of the two arc-shaped clamping sleeves; a fastening sleeve is connected to the deep pipe in a sliding mode, an internal thread is arranged on the inner side wall of the fastening sleeve, and the internal thread of the fastening sleeve is matched with the external thread of the arc-shaped clamping sleeve; the drainage bottle is simple in structure, convenient to operate and capable of effectively improving firmness and sealing performance of connection between the drainage tube and the drainage bottle.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, specifically to a drainage tube connection structure. Background Technology

[0002] Chest drainage is a widely used clinical treatment technique that uses gravity drainage to drain fluid, blood, and air from the chest cavity. After performing closed chest drainage, medical staff leave a chest drainage tube in the patient's chest cavity and then connect the chest drainage tube to the drainage bottle to facilitate the removal of fluid, blood, and air from the patient's chest cavity.

[0003] Currently, in clinical hospital procedures, the connection between chest drainage tubes and drainage bottles is always a splice. This leads to two problems during the connection: First, the connection is not very secure, resulting in a certain rate of tube dislodgement. Once dislodgement occurs, it not only increases the workload of medical staff but also extends treatment time and reduces medical efficiency. Second, the seal is not good, which may allow air or bacteria to enter the chest drainage tube through the connection gaps, increasing the patient's risk of infection and seriously threatening the patient's life and health. Utility Model Content

[0004] The main technical problem to be solved by this utility model is to provide a drainage tube connection structure that is simple in structure, easy to operate, and can effectively improve the firmness and sealing of the connection between the drainage tube and the drainage bottle.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A drainage tube connection structure includes a connecting tube fixedly connected to a drainage bottle. A retaining ring is fixedly sleeved on the inlet end of the connecting tube. An elastic washer is tightly fitted to the outer side wall of the retaining ring away from the connecting tube. A penetration tube is fixedly sleeved inside the elastic washer. One end of the penetration tube penetrates into the connecting tube, and the outer side wall of the penetration tube slides against the inner side wall of the connecting tube. The other end of the penetration tube is integrally connected to a drainage tube. Two arc-shaped sleeves are symmetrically sleeved on the outer sides of the elastic washer and the retaining ring. Both arc-shaped sleeves have external threads on their outer side walls. A fastening sleeve is slidably connected to the penetration tube. The inner side wall of the fastening sleeve has internal threads, and the internal threads of the fastening sleeve match the external threads of the arc-shaped sleeves.

[0007] The following are further optimizations of the above technical solution by this utility model:

[0008] Further optimization: The outer diameter of the elastic washer is a certain size larger than the outer diameter of the fixed ring.

[0009] Further optimization: The inlet end of the connecting tube is integrally injection molded with the drainage bottle, and the outlet end of the connecting tube is integrally injection molded with the fixing ring.

[0010] Further optimization: The infiltration tube and drainage tube are integrally injection molded.

[0011] Further optimization: The elastic washer is made of rubber material.

[0012] Further optimization: The sliding fit gap between the outer diameter of the infeed tube and the inner diameter of the connecting tube is between 0.1mm and 0.5mm.

[0013] Further optimization: The end of the insertion tube into the connecting tube is rounded, and the surface roughness reaches Ra0.8 or less.

[0014] Further optimization: The arc of the arc-shaped sleeve is 5°-10° greater than the arc of the fixing ring.

[0015] Further optimization: The cross-section of the arc-shaped jacket is C-shaped.

[0016] Further optimization: The top inner wall of the arc-shaped sleeve contacts the top of the elastic washer, and the bottom inner wall of the arc-shaped sleeve contacts the bottom of the fixing ring.

[0017] This invention uses an elastic washer that fits tightly between the fixing ring and the infiltration tube. The washer itself is elastic and, after being clamped by the arc-shaped sleeve, it can fill the tiny gaps between the components, forming a reliable sealing barrier. Thus, whether in a static state or during drainage, it can effectively prevent liquid from leaking from the connection between the connecting tube and the infiltration tube under the pressure of the liquid, ensuring the sealing of the drainage.

[0018] This invention ensures a sealing effect from multiple angles through the cooperation of components such as a fixing ring, an elastic washer, an arc-shaped clamp, and a fastening sleeve. The fixing ring plays a role in initial positioning and auxiliary fixation, providing a stable support base for the elastic washer. The arc-shaped clamp and the fastening sleeve apply uniform clamping force through threaded engagement, enabling the elastic washer to better perform its sealing function. The cooperation of these components forms a stable and well-sealed connection structure, greatly reducing the risk of leakage.

[0019] This invention uses the matching of the external thread on the outer side of the arc-shaped jacket with the internal thread on the inner side of the fastening sleeve. This threaded connection method allows the operator to precisely control the clamping degree of components such as elastic washers and fixing rings by tightening the fastening sleeve. As the fastening sleeve is screwed in, the clamping force is evenly applied to the arc-shaped jacket and then transmitted to the wrapped components, tightly fixing them together. This ensures that the connection between the connecting tube and the insertion tube remains stable even when faced with various external forces, such as the pipeline being pulled, and is not prone to loosening or disconnection, thus guaranteeing the long-term stable operation of the drainage pipeline.

[0020] This invention features a design where one end of the insertion tube extends into the connecting tube, and the two slide together. This design ensures a tight connection and can accommodate different installation angles and minor position adjustments to a certain extent. In addition, the fixing effect of other components makes the entire connection structure both stable and flexible, further enhancing the reliability of the connection and reducing the occurrence of liquid delivery interruptions due to unstable connections.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the usage state structure of an embodiment of this utility model.

[0025] In the diagram: 1-Connecting tube; 2-Fixing ring; 3-Elastic washer; 4-Deep tube; 5-Drainage tube; 6-Arc-shaped sleeve; 7-Fastening sleeve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-2 As shown, a drainage pipe connection structure includes a connecting pipe 1 fixedly connected to a drainage bottle. A fixing ring 2 is sleeved on the inlet end of the connecting pipe 1. An elastic washer 3 is tightly fitted on the outer side wall of the fixing ring 2 away from the connecting pipe 1. A penetration tube 4 is fixedly sleeved inside the elastic washer 3. One end of the penetration tube 4 penetrates into the connecting pipe 1, and the outer side wall of the penetration tube 4 slides against the inner side wall of the connecting pipe 1. The other end of the penetration tube 4 is fixedly connected to a drainage pipe 5. Two arc-shaped sleeves 6 are symmetrically sleeved on the outer sides of the elastic washer 3 and the fixing ring 2. Both arc-shaped sleeves 6 have external threads on their outer side walls. A fastening sleeve 7 is slidably connected to the penetration tube 4. The inner side wall of the fastening sleeve 7 has internal threads, and the internal threads of the fastening sleeve 7 match the external threads of the arc-shaped sleeves 6.

[0028] With this design, firstly, the elastic gasket 3 fits tightly between the fixing ring 2 and the infiltration tube 4. It is elastic and, after being clamped by the arc-shaped sleeve 6, can fill the tiny gaps between the components to form a reliable sealing barrier. Thus, whether in a static state or during drainage, it can effectively prevent liquid from leaking from the connection between the connecting tube 1 and the infiltration tube 4 under the pressure of the liquid, ensuring the sealing of the drainage.

[0029] Secondly, the sealing effect is ensured from multiple angles through the cooperation of components such as the fixing ring 2, the elastic washer 3, the arc-shaped clamp 6, and the fastening sleeve 7. The fixing ring 2 plays a role in initial positioning and auxiliary fixation, providing a stable support base for the elastic washer 3. The arc-shaped clamp 6 and the fastening sleeve 7 apply uniform clamping force through threaded engagement, enabling the elastic washer 3 to better perform its sealing function. The cooperation of each component forms a stable and well-sealed connection structure, which greatly reduces the risk of leakage.

[0030] Furthermore, the external thread on the outer side of the arc-shaped sleeve 6 matches the internal thread on the inner side of the fastening sleeve 7. This threaded connection allows the operator to precisely control the clamping degree of components such as the elastic washer 3 and the fixing ring 2 by tightening the fastening sleeve 7. As the fastening sleeve 7 is screwed in, the clamping force is evenly applied to the arc-shaped sleeve 6 and then transmitted to the wrapped components, tightly fixing them together. This ensures that the connection between the connecting pipe 1 and the in-depth pipe 4 remains stable even when faced with various external forces, such as the pipe being pulled, and is not prone to loosening or disconnection, thus guaranteeing the long-term stable operation of the drainage pipe.

[0031] Finally, one end of the insertion tube 4 is inserted into the connecting tube 1 and the two slide together. This design not only ensures the tightness of the connection between the two, but also adapts to different installation angles and slight position adjustment requirements to a certain extent. At the same time, in conjunction with the fixing effect of other components, the entire connection structure is stable and flexible, further enhancing the reliability of the connection and reducing the occurrence of liquid delivery interruptions due to unstable connection.

[0032] The drainage bottle used in this embodiment is a drainage bottle from the prior art, so it will not be described in detail in this embodiment.

[0033] The outer diameter of the elastic washer 3 is larger than the outer diameter of the fixed ring 2 by a certain amount.

[0034] In this embodiment, the outer diameter of the elastic washer 3 is 0.5mm-2mm larger than the outer diameter of the fixing ring 2.

[0035] With this design, firstly, when the arc-shaped jacket 6 is clamped, the elastic washer 3 can use its extra outer diameter to expand and fill the gap, and after compression, it fits the inner side of the arc-shaped jacket 6 to form a reliable sealing interface, ensuring the sealing of the drainage pipeline.

[0036] Secondly, when faced with changes in conditions such as temperature, the extra outer diameter of the elastic gasket 3 provides room for deformation, which can adaptively adjust the shape and sealing state, reduce the risk of leakage, and improve sealing stability.

[0037] Furthermore, when subjected to external impact during use, the larger outer diameter part of the elastic washer 3 acts as a "buffer pad," absorbing and dispersing the external force, protecting the connection parts, reducing the probability of component damage due to vibration, and extending service life.

[0038] In addition, during installation, the outer diameter of the elastic washer 3 is designed to facilitate its positioning on the fixing ring 2. After placement, it is not easy to slip or shift. When tightened, it can deform evenly, making the installation smoother, reducing difficulty and improving efficiency. It is suitable for quick connection of pipelines.

[0039] Finally, this outer diameter difference range can compensate for assembly problems such as differences in pipe size. The elastic washer 3 can adapt to various situations by deformation with this allowance, enhancing the versatility and adaptability of the connection structure and meeting the drainage needs of different scenarios.

[0040] The feed end of the connecting tube 1 is integrally injection molded with the diversion bottle.

[0041] With this design, firstly, the connecting tube 1 and the drainage bottle are integrally injection molded, so that there are no gaps or interfaces that may occur in traditional connection methods between the connecting tube 1 and the drainage bottle. As a result, during the drainage process, the liquid will not leak due to poor sealing at the interface, providing a reliable sealing guarantee for the collection and storage of liquid.

[0042] Secondly, during the injection molding process, the materials of the connecting tube 1 and the drainage bottle are fused together to form a continuous whole, with uniform stress distribution and reduced stress concentration, thus better able to withstand pressure and temperature changes and enhance sealing stability.

[0043] Furthermore, one-piece injection molding eliminates the need for separate manufacturing of multiple parts and subsequent assembly processes, greatly simplifying the production process, saving time and labor costs, and reducing scrap rates and production costs.

[0044] Finally, the one-piece injection-molded connecting tube 1 has no gaps between it and the drainage bottle, which prevents dirt and grime from accumulating as easily as traditional connection methods, making it convenient for cleaning and disinfection.

[0045] The discharge end of the connecting pipe 1 is integrally injection molded with the fixing ring 2.

[0046] This design, firstly, eliminates the connection gap between the two by integrally injection molding the discharge end of the connecting pipe 1 and the fixing ring 2, making the stress distribution more uniform, enhancing the bonding strength, preventing loosening and separation under stress, and ensuring the stable operation of the drainage system.

[0047] Secondly, the discharge end of the connecting pipe 1 and the fixing ring 2 are integrally injection molded, which effectively eliminates the risk of leakage at the connection and provides reliable sealing. Its sealing performance is not affected by factors such as time, temperature, and pressure, and it is durable.

[0048] Furthermore, one-piece injection molding eliminates the need for separate manufacturing of multiple parts and subsequent assembly processes, greatly simplifying the production process, saving time and labor costs, and reducing scrap rates and production costs.

[0049] The infiltration tube 4 and the drainage tube 5 are integrally injection molded.

[0050] The elastic washer 3 is made of rubber material.

[0051] This design offers several advantages. First, the rubber has excellent elasticity, allowing it to deform significantly under clamping force and fit tightly against the gaps between components, preventing leaks even if there are tolerances or installation defects in the components. Second, it can adapt to vibrations and dimensional changes in the pipeline caused by liquid flow and temperature variations, maintaining a dynamic seal.

[0052] Secondly, the rubber elastic gasket 3 will not release harmful substances into biological samples or drug solutions, ensuring the safety and reliability of the medical process.

[0053] Secondly, the relatively smooth surface of rubber makes it less prone to absorbing dirt and bacteria, facilitating cleaning and disinfection.

[0054] Finally, rubber has a wide range of applications and low cost, and mass production allows for cost control, enhancing product competitiveness; it is also easy to mold and injection mold, which can meet the needs of different pipe specifications, and production is efficient, which is conducive to large-scale production and rapid supply.

[0055] The sliding fit gap between the outer diameter of the infiltration tube 4 and the inner diameter of the connecting tube 1 is between 0.1mm and 0.5mm.

[0056] This design ensures that the gap range allows the in-depth tube 4 to slide smoothly within the connecting tube 1, while also achieving a good seal through the cooperation of components such as the elastic gasket 3. Thus, when the elastic gasket 3 is deformed by the arc-shaped jacket 6, the smaller gap makes it easier for the elastic gasket 3 to fill the gap, forming an effective sealing barrier and preventing liquid leakage from the connection between the in-depth tube 4 and the connecting tube 1.

[0057] Secondly, in actual use, due to factors such as temperature changes and liquid pressure, the connecting pipe 1 and the inlet pipe 4 may undergo slight thermal expansion and contraction or deformation. A gap of 0.1mm-0.5mm can accommodate these slight changes to a certain extent, avoiding leakage due to excessive gap caused by component deformation, or jamming due to insufficient gap, thereby maintaining the stability of sealing performance.

[0058] Furthermore, this gap range can generate moderate friction, ensuring that the insertion tube 4 will not easily fall off within the connecting tube 1, and can slide relative to it when needed. The friction generated by this gap also ensures that the insertion tube 4 is both stable and slidable within the connecting tube 1, maintaining a stable relative position during equipment operation and reducing loosening of the connection caused by shaking or vibration.

[0059] Finally, the 0.1mm-0.5mm gap allows the insertion tube 4 to be easily inserted into the connecting tube 1, and it is also easy to make fine adjustments to the position during installation. Compared with the difficulty of insertion or inaccurate positioning caused by improper gap, it greatly improves the installation efficiency and facilitates on-site installation.

[0060] The end of the insertion tube 4 into the connecting tube 1 is rounded, and the surface roughness reaches Ra0.8 or less.

[0061] This design, firstly, uses rounded corners to guide the insertion of the deep tube 4, reducing angle deviation and jamming, and improving installation efficiency; combined with low roughness, it ensures accurate positioning during insertion, guarantees concentricity with the connecting tube 1, and facilitates subsequent sealing and connection stability.

[0062] Secondly, smooth surfaces and rounded corners reduce fluid resistance and turbulence, improve drainage efficiency, and reduce the risk of seal failure due to fluid impact.

[0063] Furthermore, the low roughness reduces wear on the inner walls of the in-depth tube 4 and the connecting tube 1, maintains the dimensional accuracy and fit clearance of the connection parts, and extends the service life of the drainage pipeline system.

[0064] The arc of the arc-shaped sleeve 6 is 5°-10° greater than the arc of the fixing ring 2.

[0065] This design, firstly, allows for a more complete wrapping of the fixing ring 2 and the elastic washer 3 with a larger arc, ensuring a more even distribution of the clamping force applied by the fastening sleeve 7. This avoids uneven local force distribution that could lead to poor sealing or component damage. It also allows for more efficient transmission of clamping force, compressing the elastic washer 3 and enhancing the sealing and stability of the connection.

[0066] Secondly, in actual use, due to factors such as temperature, the fixing ring 2 and the elastic washer 3 may undergo slight deformation or displacement. The large curvature of the arc-shaped jacket 6 can compensate for these changes, continuously and effectively clamp, maintain good sealing performance, prevent liquid leakage, and reduce maintenance and replacement costs.

[0067] Furthermore, during installation, the curvature difference acts as a guide, making it easier for operators to accurately place the curved sleeve 6 and improving installation efficiency; at the same time, it provides fine-tuning flexibility to accommodate minor position adjustments during the installation of the fixing ring 2, elastic washer 3, or deep tube 4.

[0068] Finally, a larger arc can disperse the clamping force, avoid stress concentration, and extend the service life of the fixing ring 2, the elastic washer 3, and the entire connection structure.

[0069] The cross-section of the arc-shaped jacket 6 is C-shaped.

[0070] This design allows the C-shaped structure to fit onto the fixing ring 2 and the elastic washer 3 from the side, eliminating the need to pass through one end of the pipe. This makes installation easier even in spaces with limited space, improving efficiency.

[0071] Secondly, when maintaining, inspecting, or replacing parts, they can be removed from the side without extensive disassembly, thus shortening maintenance time and reducing costs.

[0072] Furthermore, when subjected to the force of the fastening sleeve 7, the C-type sleeve contracts inward evenly. Its open design allows it to deform elastically, conform to the shape of the component, distribute the clamping force evenly, and improve the connection stability.

[0073] The top inner wall of the arc-shaped sleeve 6 is in contact with the top of the elastic washer 3, and the bottom inner wall of the arc-shaped sleeve 6 is in contact with the bottom of the fixing ring 2.

[0074] This design has several advantages. First, the top of the arc-shaped sleeve 6 contacts the top of the elastic gasket 3, preventing the elastic gasket 3 from shifting or misaligning during installation and use. This ensures that the elastic gasket 3 deforms evenly under the clamping force of the sleeve, effectively filling the gaps between components. In medical drainage, this helps prevent infection and maintain the effectiveness of the procedure. At the same time, the bottom of the arc-shaped sleeve 6 contacts the bottom of the fixing ring 2, providing support for the fixing ring 2 and keeping it stable under pressure and vibration, thereby ensuring a good seal for the elastic gasket 3.

[0075] Secondly, the top of the arc-shaped sleeve 6 contacts the elastic washer 3, and the bottom of the arc-shaped sleeve 6 contacts the fixing ring 2, so that the clamping force of the fastening sleeve 7 can be evenly transmitted to both, avoiding local deformation and damage, enhancing the stability of the connection, and the three form a mutually supporting structure, enhancing the ability to resist external forces, reducing the risk of loosening and disconnection, and ensuring the long-term stable operation of the drainage pipeline.

[0076] Furthermore, clear installation instructions are provided for installers. Simply ensure that the top of the arc-shaped sleeve 6 is aligned with the top of the elastic washer 3 and the bottom of the arc-shaped sleeve 6 is aligned with the bottom of the fixing ring 2 to ensure accurate installation.

[0077] The outer wall of the fastening sleeve 7 is provided with anti-slip texture.

[0078] This design, with its anti-slip texture, significantly enhances the friction between the hand and the fastening components, allowing for a firm grip and precise rotation of the fastening sleeve 7.

[0079] When in use, first insert the end of the indenter tube 4 with rounded corners and a smooth surface, aligning it with the feed end of the connecting tube 1. As the indenter tube 4 is inserted, the elastic washer 3 comes into contact with the fixing ring 2. At this point, stop inserting the indenter tube 4.

[0080] Subsequently, two C-shaped arc-shaped sleeves 6 are symmetrically fitted onto the outer sides of the elastic washer 3 and the fixing ring 2 from the side, so that the top inner wall of the arc-shaped sleeve 6 contacts the top of the elastic washer 3 and the bottom inner wall of the arc-shaped sleeve 6 contacts the bottom of the fixing ring 2.

[0081] Then, the fastening sleeve 7 is placed on the in-depth tube 4 and aligned with the external thread of the arc-shaped clamp 6. By rotating the fastening sleeve 7, its internal thread, which matches the arc-shaped clamp 6, is used to make the fastening sleeve 7 slide along the in-depth tube 4 and gradually tighten, thereby causing the arc-shaped clamp 6 to contract inward, applying a uniform clamping force to the elastic washer 3 and the fixing ring 2, and enhancing the sealing and firmness of the connection.

[0082] For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. A drainage tube connection structure, comprising a connecting tube (1) fixedly connected to a drainage bottle, characterized in that: A fixing ring (2) is fixedly sleeved on the feed end of the connecting pipe (1). An elastic washer (3) is tightly fitted on the outer wall of the fixing ring (2) away from the connecting pipe (1). A deep tube (4) is fixedly sleeved inside the elastic washer (3). One end of the deep tube (4) is inserted into the connecting pipe (1), and the outer wall of the deep tube (4) slides against the inner wall of the connecting pipe (1). The other end of the deep tube (4) is integrally connected to a drainage tube (5). Two arc-shaped sleeves (6) are symmetrically sleeved on the outer side of the elastic washer (3) and the fixing ring (2). External threads are provided on the outer walls of the two arc-shaped sleeves (6). A fastening sleeve (7) is slidably connected on the deep tube (4). Internal threads are provided on the inner wall of the fastening sleeve (7), and the internal threads of the fastening sleeve (7) match the external threads of the arc-shaped sleeve (6).

2. The drainage pipe connection structure according to claim 1, characterized in that: The outer diameter of the elastic washer (3) is a certain size larger than the outer diameter of the fixed ring (2).

3. The drainage pipe connection structure according to claim 1, characterized in that: The feed end of the connecting tube (1) is integrally injection molded with the diversion bottle, and the discharge end of the connecting tube (1) is integrally injection molded with the fixing ring (2).

4. The drainage pipe connection structure according to claim 3, characterized in that: The in-depth tube (4) and the drainage tube (5) are integrally injection molded.

5. The drainage pipe connection structure according to claim 1, characterized in that: The elastic washer (3) is made of rubber material.

6. The drainage pipe connection structure according to claim 1, characterized in that: The sliding fit gap between the outer diameter of the in-depth tube (4) and the inner diameter of the connecting tube (1) is between 0.1mm and 0.5mm.

7. The drainage pipe connection structure according to claim 6, characterized in that: The end of the insertion tube (4) into the connecting tube (1) is rounded, and the surface roughness reaches Ra0.8 or less.

8. The drainage pipe connection structure according to claim 7, characterized in that: The arc of the arc-shaped sleeve (6) is 5°-10° greater than the arc of the fixed ring (2).

9. A drainage pipe connection structure according to claim 8, characterized in that: The cross-section of the arc-shaped jacket (6) is C-shaped.

10. A drainage pipe connection structure according to claim 9, characterized in that: The top inner wall of the arc-shaped sleeve (6) is in contact with the top of the elastic washer (3), and the bottom inner wall of the arc-shaped sleeve (6) is in contact with the bottom of the fixing ring (2).

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