A sealing connecting mechanism for rural sewage reconstruction pipeline

Abstract

The present application belongs to the technical field of sewage pipeline connection, and particularly relates to a sealing connection mechanism for rural sewage reconstruction pipeline, which comprises a connecting pipe, the rear end of the connecting pipe is movably sleeved with an inner sealing gasket and an inner compression gasket, and the rear end of the connecting pipe is further provided with an inner locking piece; the surface of the connecting pipe close to the front end is movably sleeved with an outer sealing gasket, and the front surface of the connecting pipe and located in front of the outer sealing gasket is further fixedly provided with an outer compression gasket. The supporting columns on the inner and outer compression gaskets are distributed in the circumferential direction of the connecting pipe and rigidly abut against the wall of the wellbore pipe after being fixed, and the corresponding supporting columns on the inner and outer sides act on the same position of the wall, which balances the wall pressure and forms a circumferential rigid support, the design changes the traditional fixing mode relying on the flexible contact of the sealing gasket, can resist the deviation of the connecting pipe caused by the stress transmission or external load of the sewage pipe, and further improves the sealing performance of the inner and outer sealing gaskets in connection with the wellbore pipe.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage pipeline connection, and particularly relates to a sealing connection mechanism for rural sewage reconstruction pipeline. BACKGROUND

[0002] In rural sewage pipeline reconstruction, the well shaft pipe is a key component for connecting the underground sewage pipeline and the ground inspection well cover, cleaning port and other facilities, is usually a vertically installed tubular structure, and is mostly made of PVC or plastic.

[0003] In the installation of the well shaft pipe in rural sewage pipeline reconstruction, the connection between the well shaft pipe and the sewage pipeline usually adopts a method of opening a hole and connecting a saddle joint: a mounting hole is first opened at the corresponding position of the well shaft pipe, and then the end of the sewage pipeline is sealed and fixed in the hole through the saddle joint; the typical structure and installation method of the existing saddle joint are as follows: the main structure of the saddle joint includes a connecting pipe embedded in the mounting hole of the well shaft pipe, and the two ends of the connecting pipe are respectively attached to the inner and outer pipe walls of the well shaft pipe through sealing gaskets; each of the outer sides of the sealing gaskets has a piece of hard plastic sheet for pressing, and an external locking ring is connected with the connecting pipe through threads, and the locking ring is moved along the connecting pipe by rotating, and the hard plastic sheet is pushed to press the sealing gaskets, so as to finally realize the fixation and sealing of the connecting pipe and the well shaft pipe; however, the above connection method of the sewage pipeline and the well shaft pipe still has the following disadvantages: 1) when the hard plastic sheet is pushed by the locking ring, the force is concentrated in the middle part of the sheet body, so that the pressure of the edge on the outer side of the sealing gasket is insufficient, the attachment tightness of the sealing gasket and the well shaft pipe wall is greatly reduced, especially when the water flow in the pipeline is impacted or the ground is slightly subsided, a gap is easily formed at the sealing edge, sewage leakage is caused, and the surrounding soil or underground water is further polluted.

[0004] 2) the fixation of the connecting pipe and the well shaft pipe mainly depends on the flexible contact of the two sealing gaskets, and lacks a rigid support structure; when the water flow pressure in the sewage pipeline fluctuates or there is a slight load outside, the stress transmitted by the sewage pipeline will directly act on the connecting pipe, so that the connecting pipe is slightly deviated relative to the well shaft pipe; after long-term accumulation, cracks may be generated at the interface between the connecting pipe and the sewage pipeline, and the overall sealing performance is further reduced. SUMMARY

[0005] In order to solve the above problems, the application provides a sealing connection mechanism for rural sewage reconstruction pipeline, which is used to solve the problems mentioned in the background.

[0006] To achieve the above objectives, this application provides the following technical solution: The present invention provides a sealing connection mechanism for rural sewage renovation pipelines, including a connecting pipe. An inner sealing gasket and an inner clamping gasket are movably fitted at the rear end of the connecting pipe, and an inner locking element is also provided at the rear end of the connecting pipe. An outer sealing gasket is movably fitted on the surface of the connecting pipe near its front end, and an outer clamping gasket is fixedly provided on the front surface of the connecting pipe, located in front of the outer sealing gasket. An outer locking element is provided at the front end of the connecting pipe. Multiple top support columns are fixedly provided on the sides of the outer and inner clamping gaskets that are close to each other, distributed circumferentially along the connecting pipe. One end of each top support column abuts against the wall of the external well pipe. A U-shaped slot is formed between the inner walls of the connecting pipe, the inner clamping gasket, and the outer clamping gasket. Multiple sets of U-shaped slots are provided and distributed circumferentially along the connecting pipe. A U-shaped buckle is fitted inside the U-shaped slot by an interference fit, and protrusions are provided on the inner sides of both arms of the U-shaped buckle. The U-shaped buckle is inserted into the corresponding U-shaped slot, causing the edges of the outer and inner pressure gaskets to generate inward pressure, controlling the outer and inner pressure gaskets to further compress the outer and inner sealing gaskets; the top support column achieves a rigid connection between the inner and outer pressure gaskets and the well casing.

[0007] According to an advantageous embodiment, the inner locking member includes an annular sealing groove on one side of the inner locking sleeve, the outer wall of the rear end of the connecting pipe being threadedly connected to the inner wall of the outer ring of the sealing groove, and an O-ring sealing strip being fixedly disposed in the sealing groove.

[0008] According to an advantageous embodiment, an extension sleeve is integrally provided on the rear side of the inner compression gasket, and an O-ring seal strip II is provided between the front side of the inner locking sleeve and the rear side of the extension sleeve, the O-ring seal strip II being movably sleeved on the surface of the connecting pipe.

[0009] According to an advantageous embodiment, a guide seat is fixedly provided on the surface of the extension sleeve, and a locking rod is slidably inserted between the inner locking sleeve and the guide seat, with one end of the locking rod threadedly connected to one side of the inner pressure pad.

[0010] According to an advantageous embodiment, the outer locking member includes an outer locking sleeve that is threaded to the front end surface of the connecting pipe. A rubber compression pad is fixedly disposed on the inner ring of the outer locking sleeve near the front side, and the side of the compression pad facing the inside of the connecting pipe is configured as a slope.

[0011] According to an advantageous embodiment, a notch extending in the circumferential direction is provided on the inner wall of the front port of the connecting pipe, and an O-ring sealing strip is provided in the notch.

[0012] According to an advantageous embodiment, a guide seat two is fixedly provided on the surface of the connecting pipe, and a locking rod two is slidably inserted between the outer locking sleeve and the guide seat two, with one end of the locking rod two being threadedly connected to one side of the outer pressure pad.

[0013] According to an advantageous embodiment, both the inner and outer sealing gaskets are provided with multiple positioning holes distributed along the circumference of the connecting pipe, and the top support column moves through the corresponding positioning hole and abuts against the pipe wall of the well casing.

[0014] Compared with the prior art, the sealing connection mechanism for rural sewage renovation pipelines provided by the present invention has the following beneficial effects: 1. In the present invention, the traditional rigid plastic sheet has insufficient edge pressure due to concentrated force, while this mechanism, through the synergistic compression of the inner and outer pressure pads, and the additional clamping force on the edges of the inner and outer pressure pads by the U-shaped buckle, makes the inner and outer sealing pads uniformly adhere to the inner wall of the well pipe along the circumference of the connecting pipe, completely eliminating the gaps at the sealing edges. Even when water flow impacts or the ground settles, the inner and outer sealing pads can maintain close contact with the well pipe wall, thus preventing sewage leakage from polluting the soil or groundwater at the source.

[0015] 2. In this invention, the top support columns on the inner and outer pressure gaskets are distributed along the circumference of the connecting pipe and, after being fixed, rigidly abut against the pipe wall of the well shaft. The corresponding top support columns on the inner and outer sides act on the same position of the pipe wall, which not only balances the pipe wall pressure but also forms a circumferential rigid support. This design changes the traditional fixing method that relies on the flexible contact of the sealing gasket. It can resist the displacement of the connecting pipe caused by stress transmission in the sewage pipe or external loads, further improve the sealing performance of the inner and outer sealing gaskets and the well shaft pipe connection, and greatly reduce the risk of sewage leakage caused by cracks in the inner and outer sealing gaskets. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a side view, cross-sectional view, and three-dimensional structural diagram of the entire assembly of the present invention.

[0018] Figure 3 This is a side sectional plan view of the overall structure of the present invention after installation.

[0019] Figure 4 This is a schematic diagram of the overall exploded structure of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the connecting pipe and the external compression gasket in this invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the outer locking sleeve in this invention.

[0022] Figure 7 This is a diagram showing the external structure of the inner pressure gasket in this invention.

[0023] Figure 8This is a schematic diagram showing the relative positions of the inner locking sleeve and the O-ring sealing strip in this invention.

[0024] Figure 9 This is a three-dimensional structural diagram of the U-shaped buckle in this invention.

[0025] The attached diagram shows the following symbols: 1. Connecting pipe; 2. Inner sealing gasket; 3. Inner compression gasket; 31. Extension sleeve; 4. Inner locking element; 41. Inner locking sleeve; 42. Sealing groove; 43. O-ring seal one; 44. O-ring seal two; 5. Outer sealing gasket; 6. Outer compression gasket; 7. Outer locking element; 71. Outer locking sleeve; 72. Extrusion pad; 8. Top support column; 9. U-shaped slot; 10. U-shaped buckle; 11. Protrusion; 12. Guide seat one; 13. Locking rod one; 14. O-ring seal three; 15. Guide seat two; 16. Locking rod two; 17. Well shaft pipe; 18. Sewage pipe. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 -Appendix Figure 9 This application will now be described in further detail.

[0027] Please refer to the following: Figure 1 , Figure 2 and Figure 4 A sealing connection mechanism for rural sewage renovation pipelines is disclosed, used to connect a sewage pipe 18 to a well pipe 17. The upper end of the well pipe 17 is equipped with a corresponding sealing cap for easy operation, used for initial installation and subsequent maintenance. The connection mechanism includes a connecting pipe 1. An inner sealing gasket 2 and an inner clamping gasket 3 are movably fitted at the rear end of the connecting pipe 1, and an inner locking element 4 is also provided at the rear end of the connecting pipe 1. An outer sealing gasket 5 is movably fitted on the surface of the connecting pipe 1 near its front end, and an outer clamping gasket 6 is fixedly installed on the front surface of the connecting pipe 1, located in front of the outer sealing gasket 5. An outer locking element 7 is provided at the front end of the connecting pipe 1. The connecting pipe 1, the outer clamping gasket 6, and the inner clamping gasket 3 are all made of PVC. The inner sealing gasket 2 and the outer sealing gasket 5 are both made of rubber.

[0028] In practice, the connecting pipe 1 is fixed and sealed on the well casing 17 with the installation hole. First, the outer sealing gasket 5 is placed on the connecting pipe 1, so that the outer sealing gasket 5 fits against the outer compression gasket 6 fixed on the connecting pipe 1. Then, the rear end of the connecting pipe 1 is inserted into the external installation hole port of the well casing 17. Then, inside the well casing 17, the inner sealing gasket 2 and the inner compression gasket 3 are successively placed on the rear end of the connecting pipe 1. Then, the inner locking member 4 is used to squeeze the inner compression gasket 3, so that the inner compression gasket 3 and the outer compression gasket 6 are simultaneously subjected to pressure, pressing the inner sealing gasket 2 and the outer sealing gasket 5 tightly against the inner and outer pipe walls of the well casing 17, thereby initially fixing the connecting pipe 1 to the well casing 17.

[0029] See Figure 2 , Figure 3 , Figure 5 and Figure 7 Multiple top support columns 8 are fixedly installed on the side of the outer pressure gasket 6 and the inner pressure gasket 3 that are close to each other, distributed around the circumference of the connecting pipe 1. Multiple positioning holes are opened on the inner sealing gasket 2 and the outer sealing gasket 5, distributed around the circumference of the connecting pipe 1. The top support column 8 moves through the corresponding positioning hole and abuts against the pipe wall of the well tube 17.

[0030] In actual operation, the inner pressure gasket 3 and the outer pressure gasket 6 can simultaneously approach the wall of the well casing 17, squeezing the corresponding inner sealing gasket 2 and outer sealing gasket 5. After being squeezed to a certain extent, the top support columns 8 on the inner pressure gasket 3 and the outer pressure gasket 6 are rigidly supported by the wall of the well casing 17, so that the connecting pipe 1 and the well casing 17 form a rigid connection, improving the stability and sealing quality after the connection. The corresponding front and rear top support columns 8 act one-to-one on the inner and outer walls of the well casing 17, ensuring that the pressure application points of the front and rear top support columns 8 are at the same position on the wall of the well casing 17, and ensuring the pressure balance of the well casing 17 wall.

[0031] See Figure 2 , Figure 3 and Figure 9 A U-shaped slot 9 is formed between the inner walls of the connecting pipe 1, the inner pressure gasket 3, and the outer pressure gasket 6. The U-shaped slot 9 is formed on the inner wall of the assembly formed by the connecting pipe 1, the inner pressure gasket 3, and the outer pressure gasket 6. Multiple sets of U-shaped slots 9 are provided and distributed along the circumference of the connecting pipe 1. A U-shaped buckle 10 is assembled in the U-shaped slot 9 by interference fit. The inner sides of the two arms of the U-shaped buckle 10 are provided with protrusions 11.

[0032] In practice, after fixing the connecting pipe 1 to the well pipe 17, the operator inserts the U-shaped buckle 10 into the corresponding U-shaped slot 9 from the inside of the connecting pipe 1. The two ends of the U-shaped buckle 10 are respectively inside the inner pressure gasket 3 and the outer pressure gasket 6, so that the edge areas of the outer pressure gasket 6 and the inner pressure gasket 3 generate additional pressure towards the pipe wall of the well pipe 17, ensuring that the outer sealing gasket 5 and the inner sealing gasket 2 can fit more fully against the inner and outer pipe walls of the well pipe 17. After the external sewage pipe 18 is inserted into the connecting pipe 1, the sewage pipe 18 can limit the U-shaped buckle 10.

[0033] It should be noted that, since the curvature and length of the inner clamping pad 3 and the outer clamping pad 6 are different at different positions, the length of the top support column 8, the depth and curvature of the U-shaped slot 9, and the depth and curvature of the U-shaped buckle 10 at different positions are adapted accordingly to ensure that each top support column 8 can contact the wall of the well tube 17, and to ensure that after the U-shaped buckle 10 is inserted into the U-shaped slot 9, it can extend as naturally as possible to the edge of the inner clamping pad 3 and the outer clamping pad 6 for clamping.

[0034] See Figure 3 , Figure 7 and Figure 8 The inner locking component 4 includes an inner locking sleeve 41. An annular sealing groove 42 is provided on one side of the inner locking sleeve 41. The outer wall of the rear end of the connecting pipe 1 is threadedly connected to the inner wall of the outer ring of the sealing groove 42. An O-ring sealing strip 43 is also fixedly provided in the sealing groove 42. An extension sleeve 31 is integrally provided on the rear side of the inner pressure gasket 3. An O-ring sealing strip 44 is provided between the front side of the inner locking sleeve 41 and the rear side of the extension sleeve 31. The O-ring sealing strip 44 is movably sleeved on the surface of the connecting pipe 1.

[0035] In practice, the workers sequentially place the inner sealing gasket 2, the inner pressing gasket 3 (including the extension sleeve 31), and the O-ring sealing strip 44 onto the rear end surface of the connecting pipe 1. Then, the inner locking sleeve 41 is rotated and placed onto the rear end surface of the connecting pipe 1, and the end face of the extension sleeve 31 is pushed by the O-ring sealing strip 44, so that the inner pressing gasket 3 and the inner sealing gasket 2 are close to the inner wall of the well casing 17. The process continues until the front side of the inner locking sleeve 41 squeezes the O-ring sealing strip 44 to a certain extent, thus ensuring that the inner sealing gasket 2 and the outer sealing gasket 5 are tightly fitted to the inner and outer walls of the well casing 17.

[0036] See Figure 3 , Figure 7 and Figure 8To limit the inner locking sleeve 41, a guide seat 12 is fixedly installed on the surface of the extension casing 31. Both the guide seat 12 and the inner locking sleeve 41 have corresponding insertion holes. A locking rod 13 is slidably inserted between the inner locking sleeve 41 and each guide seat 12 through the insertion hole, and one end of the locking rod 13 is threaded to one side of the inner pressure gasket 3. When the inner locking sleeve 41 rotates and drives the inner sealing gasket 2 to tightly fit against the inner wall of the well casing 17, the insertion hole on the inner locking sleeve 41 is not engaged with the guide seat 12. When the insertion hole on the inner locking sleeve 41 is aligned with the extension sleeve 31, the inner locking sleeve 41 can be further rotated. Since the inner locking sleeve 41 and the extension sleeve 31 are flexibly in contact through the O-ring seal strip 44, the inner locking sleeve 41 can be further rotated to compress the O-ring seal strip 44 so that the insertion hole on the inner locking sleeve 41 aligns with the insertion hole on the guide seat 12. Then, the locking rod 13 is inserted through the insertion hole and rotated to connect with the corresponding inner pressure pad 3 by thread, thereby limiting the subsequent rotation of the locking sleeve due to water flow vibration and other reasons.

[0037] See Figure 2 , Figure 3 and Figure 6 The outer locking component 7 includes an outer locking sleeve 71 that is threaded to the front end surface of the connecting pipe 1. A rubber compression pad 72 is fixedly installed on the inner ring of the outer locking sleeve 71 near the front side. The side of the compression pad 72 facing the inside of the connecting pipe 1 is set as a slope. A notch extending along its circumference is opened on the inner wall of the front port of the connecting pipe 1. An O-ring sealing strip 314 is installed in the notch.

[0038] In practice, after fixing the connecting pipe 1 to the well pipe 17, the external sewage pipe 18 is inserted into the connecting pipe 1, so that the port of the sewage pipe 18 is inserted into the sealing groove 42 on the side of the inner locking sleeve 41 and sealed by the O-ring sealing strip 43. Then, the outer locking sleeve 71 is rotated into the front end of the connecting pipe 1. As the outer locking sleeve 71 moves, the slope of the compression pad 72 on the outer locking sleeve 71 will gradually approach the front port of the connecting pipe 1. Finally, the slope of the compression pad 72 abuts against the front port of the connecting pipe 1 and applies pressure, so that the front port of the connecting pipe 1 is subjected to inward compression force, thereby forcing the O-ring sealing strip 14 inside to fit more tightly against the outer wall of the sewage pipe 18, sealing the connection between the sewage pipe 18 and the front port of the connecting pipe 1.

[0039] See Figure 3To limit the movement of the outer locking sleeve 71, a guide seat 2 15 is fixedly provided on the surface of the connecting tube 1. Both the outer locking sleeve 71 and the guide seat 2 15 have corresponding insertion holes 2. A locking rod 2 16 is slidably inserted between the outer locking sleeve 71 and the guide seat 2 15. One end of the locking rod 2 16 is threadedly connected to one side of the outer pressure pad 6. Since the compression pad 72 flexibly abuts against the port of the connecting tube 1, when the outer locking sleeve 71 moves to a suitable position on the connecting tube 1, if the insertion hole 2 on the outer locking sleeve 71 is not aligned with the insertion hole 2 on the guide seat 2 15, the outer locking sleeve 71 is further rotated to adjust the insertion hole 2 on its surface to align with the insertion hole 2 on the guide seat 2 15. Then the locking rod 2 16 is passed through the insertion hole and threadedly connected to the outer pressure pad 6.

[0040] The specific installation process of the connection mechanism in this scheme is as follows: First, fix the connecting pipe 1 on the well casing 17: First, put the outer sealing gasket 5 on the connecting pipe 1 so that the outer sealing gasket 5 and the outer pressure gasket 6 fit together. Then, insert the rear end of the connecting pipe 1 into the external mounting hole port of the well casing 17. After that, inside the well casing 17, put the inner sealing gasket 2, the inner pressure gasket 3 (including the extension sleeve 31) and the O-ring sealing strip 44 on the rear end surface of the connecting pipe 1 in sequence, and lock them by rotating the inner locking sleeve 41 to fix the connecting pipe 1 on the well casing 17.

[0041] The second step is to insert multiple U-shaped clips 10 into the corresponding U-shaped slots 9 in sequence: the worker inserts the U-shaped clips 10 into the connecting tube 1, and then inserts the U-shaped clips 10 into the U-shaped slots 9.

[0042] The third step is to fix the sewage pipe 18 to the connecting pipe 1: First, rotate the outer locking sleeve 71 to pre-fit the front end of the connecting pipe 1, then insert one end of the sewage pipe 18 into the connecting pipe 1, so that one end of the sewage pipe 18 is inserted into the sealing groove 42 on the side wall of the inner locking sleeve 41, and then rotate the outer locking sleeve 71 again to apply pressure to the front end of the connecting pipe 1, so that the front end of the connecting pipe 1 is tightly fitted onto the surface of the sewage pipe 18, thus completing the installation of the sewage pipe 18 and the well pipe 17.

[0043] Through the coordinated compression of the inner pressure gasket 3 and the outer pressure gasket 6, and the additional clamping force of the U-shaped buckle 10 on the edges of the inner pressure gasket 3 and the outer pressure gasket 6, the inner sealing gasket 2 and the outer sealing gasket 5 are arranged as a group, and multiple groups are evenly attached to the inner wall of the well pipe 17 along the circumference of the connecting pipe 1. This completely eliminates the sealing edge gaps of the inner sealing gasket 2 and the outer sealing gasket 5, and improves the ability of the connecting pipe 1 to maintain tight contact with the pipe wall of the well pipe 17 when water flow impacts or ground subsidence occurs. This fundamentally prevents sewage leakage from polluting the soil or groundwater. At the same time, the connecting pipe 1 and the well pipe 17 are rigidly supported by the top support column 8 to ensure sealing. This can resist the displacement of the connecting pipe 1 caused by stress transmission from the sewage pipe 18 or external loads, greatly reducing the risk of sewage leakage caused by cracks in the inner sealing gasket 2 and the outer sealing gasket 5.

[0044] It should be noted that the diameters of the well casing 17 and the connecting pipe 1 are usually large enough to allow workers to reach their hands into the connecting pipe 1 and the well casing 17 for installation.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sealing connection mechanism for rural sewage treatment pipeline renovation, comprising a connecting pipe, characterized in that: The rear end of the connecting tube is movably fitted with an inner sealing gasket and an inner clamping gasket, and the rear end of the connecting tube is also provided with an inner locking component; the surface of the connecting tube near the front end is movably fitted with an outer sealing gasket, and the front surface of the connecting tube and located in front of the outer sealing gasket is also fixedly provided with an outer clamping gasket, and the front end of the connecting tube is provided with an outer locking component. Multiple support columns are fixedly installed on the side of the outer and inner pressure gaskets that are close to each other, distributed along the circumference of the connecting pipe. Multiple positioning holes are opened on the inner and outer sealing gaskets, distributed along the circumference of the connecting pipe. The support columns move through the corresponding positioning holes and abut against the pipe wall of the well pipe. The support columns on the inner and outer pressure gaskets are distributed along the circumference of the connecting pipe and, after being fixed, rigidly abut against the pipe wall of the well pipe. The corresponding inner and outer support columns act on the same position of the pipe wall, which not only balances the pipe wall pressure but also forms a ring-shaped rigid support. A U-shaped slot is opened between the inner walls of the connecting pipe, the inner pressure gasket, and the outer pressure gasket. Multiple sets of U-shaped slots are provided and distributed along the circumference of the connecting pipe. U-shaped buckles are assembled in the U-shaped slots by interference fit. The inner sides of the two arms of the U-shaped buckle are provided with protrusions. The U-shaped buckle is inserted into the corresponding U-shaped slot, causing the edges of the outer and inner pressure gaskets to generate inward pressure, controlling the outer and inner pressure gaskets to further compress the outer and inner sealing gaskets; the top support column achieves a rigid connection between the inner and outer pressure gaskets and the well casing.

2. The sealing connection mechanism for rural sewage renovation pipelines according to claim 1, characterized in that, The inner locking component includes an inner locking sleeve, and an annular sealing groove is provided on one side of the inner locking sleeve. The outer wall of the rear end of the connecting pipe is threadedly connected to the inner wall of the outer ring of the sealing groove. An O-ring sealing strip is also fixedly installed in the sealing groove.

3. The sealing connection mechanism for rural sewage renovation pipelines according to claim 2, characterized in that, An extension sleeve is integrally provided on the rear side of the inner compression gasket, and an O-ring seal strip is provided between the front side of the inner locking sleeve and the rear side of the extension sleeve. The O-ring seal strip is movably sleeved on the surface of the connecting pipe.

4. The sealing connection mechanism for rural sewage renovation pipelines according to claim 3, characterized in that, A guide seat is fixedly provided on the surface of the extension sleeve. A locking rod is slidably inserted between the inner locking sleeve and the guide seat, and one end of the locking rod is threadedly connected to one side of the inner pressure pad.

5. The sealing connection mechanism for rural sewage renovation pipelines according to claim 1, characterized in that, The external locking component includes an external locking sleeve that is threaded to the front end surface of the connecting pipe. A rubber compression pad is fixedly installed on the inner ring of the external locking sleeve near the front side, and the side of the compression pad facing the inside of the connecting pipe is set as a slope.

6. The sealing connection mechanism for rural sewage renovation pipelines according to claim 1, characterized in that, The inner wall of the front port of the connecting pipe is provided with a notch extending in the circumferential direction, and an O-ring sealing strip is provided in the notch.

7. The sealing connection mechanism for rural sewage renovation pipelines according to claim 5, characterized in that, A guide seat 2 is fixedly provided on the surface of the connecting pipe. A locking rod 2 is slidably inserted between the outer locking sleeve and the guide seat 2. One end of the locking rod 2 is threadedly connected to one side of the outer pressure pad.

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