Interface posture adaptive urban underground drainage pipeline connecting structure

Abstract

The utility model discloses an interface attitude self -adaptation's city underground drainage pipeline connecting structure, including drainage pipeline, interface seat, sealing assembly, the inside of interface seat has the spherical ball joint cavity, the both sides symmetry of interface seat notch make ball joint cavity both sides form horizontal through's communicating port, the drainage pipeline includes the deformation pipe of bending and telescopic, and the prefabricated pipe of connecting in the both ends of deformation pipe, the one end of prefabricated pipe away from deformation pipe is provided with the ball joint, the outer surface of ball joint is outward convex and forms the partial spherical surface structure of adapting with the ball joint cavity inside interface seat, and ball joint is inlayed in ball joint cavity from communicating port, and the movable seam is left between the end face of mutual inlaying ball joint, the sealing assembly is filled in movable seam.

Description

Technical Field

[0001] This utility model belongs to the field of drainage engineering technology, and specifically discloses an interface attitude adaptive connection structure for urban underground drainage pipelines. Background Technology

[0002] Urban underground drainage pipes are an important component of urban infrastructure, and their operation directly affects the function of urban drainage pipes and environmental sanitation.

[0003] Typically, urban underground drainage pipes are made up of multiple sections of concrete drainage pipes connected together. During use, due to uneven settlement of the foundation, external loads such as vehicle rolling or excessive soil lateral pressure, the joints of the drainage pipes may develop defects such as cracking, misalignment, or disconnection, which can cause leakage at the joints.

[0004] In existing technologies, the interfaces of urban underground drainage pipes typically include three types: plain-end interfaces, tongue-and-groove interfaces, and socket interfaces. Plain-end interfaces primarily rely on wire mesh concrete connections. They are simple to manufacture, have high production efficiency, and relatively low cost, and were widely used in the early days. However, their sealing effect and seismic performance are not ideal, and they are prone to misalignment or disconnection and leakage in the event of uneven foundation settlement. Socket interfaces have a protruding tenon at one end and a corresponding groove at the other. During installation, the tenon is inserted into the groove, and a rubber ring is used for sealing and waterproofing, achieving a flexible connection. The insertion depth is controlled between 80-100mm, allowing for axial displacement of the pipe (rotation angle ≤1.5°), and has a certain resistance to settlement. However, for large-diameter concrete drainage pipes, socket interfaces are prone to stress concentration, leading to circumferential cracks at the interface. The tongue and groove joint has a flared socket on one end and a spigot on the other. During installation, the spigot is inserted into the socket and the middle is filled with sealing material. It not only inherits the advantages of the socket joint, but also can meet the needs of large-diameter pipes.

[0005] Of the three interface connection methods mentioned above, the flat-mouth interface is a rigid connection and lacks self-adjustment capability. Both the flat-mouth and tongue-and-groove interfaces are flexible connections. Although both have a certain degree of resistance to settlement, their self-adjustment capability is still insufficient when faced with conditions such as high groundwater levels, weak soil layers, and heavy road surface loads, which can easily lead to uneven settlement. The risk of interface cracking, misalignment, and disconnection remains relatively high. Utility Model Content

[0006] In response to the problems mentioned in the background art, this utility model provides an interface posture adaptive connection structure for urban underground drainage pipes, so as to solve the problem that the existing urban underground drainage pipe interfaces have insufficient adaptive adjustment capabilities and are prone to defects such as cracking, misalignment, and disconnection, which lead to water leakage at the interfaces.

[0007] This utility model is achieved through the following technical solution.

[0008] An interface attitude adaptive urban underground drainage pipe connection structure, characterized in that it includes a drainage pipe, an interface seat, and a sealing component.

[0009] The interface seat has a spherical ball-connecting cavity inside, and the interface seat has symmetrical cuts on both sides to form a horizontally through-hole on both sides of the ball-connecting cavity;

[0010] The drainage pipe includes a flexible and expandable deformable pipe and prefabricated pipes connected to both ends of the deformable pipe; a ball joint is provided at the end of the prefabricated pipe away from the deformable pipe, and the outer surface of the ball joint bulges outward to form a partially spherical structure that is adapted to the ball joint cavity inside the joint seat.

[0011] The ball joints of the drainage pipes located on the left and right sides of the interface seat are respectively inserted into the ball joint cavity from the corresponding side connection port, and there is a movable gap between the end faces of the ball joints that are inserted into each other. The sealing component fills the movable gap, thereby sealing and connecting the drainage pipes on the left and right sides of the interface seat.

[0012] Preferably, the sealing assembly includes a rubber sealing ring with a circular cross-section that is filled in the movable joint, the rubber sealing ring having a circumferentially through deformation cavity filled with a flowing medium.

[0013] More preferably, the end face of the ball interface is provided with a sealing groove adapted to the rubber sealing ring, and the two sides of the rubber sealing ring are embedded and abut against the sealing groove.

[0014] In a further preferred embodiment, the present invention also includes a sealing rubber sheet, which overlaps circumferentially between the inner walls of the interlocking ball joints to cover the movable seam and the rubber sealing ring filling the movable seam.

[0015] More preferably, the sealing assembly further includes a medium delivery pipe, which is sealed through the rubber sealing ring and communicates with the deformation cavity, and a valve is provided on the medium delivery pipe.

[0016] Preferably, a circumferentially continuous grouting groove is provided on the outer spherical surface of the ball interface, and a grouting pipe that penetrates the wall of the ball interface and extends into the drainage pipe is connected to the bottom of the grouting groove.

[0017] More preferably, the ball joint cavity has two circumferentially continuous grout-stopping grooves on the cavity wall that is fitted with the ball joint, the grouting groove is located between the two grout-stopping grooves, and an annular rubber grout-stopping strip is provided in the grout-stopping groove.

[0018] Preferably, the interface seat includes an upper ring seat and an upper ring seat arranged symmetrically. A connecting plate is provided on the outer side of the ring end of the upper ring seat and the upper ring seat. Bolt holes are provided on the connecting plate. The upper ring seat and the upper ring seat are spliced ​​together with bolts through the bolt holes on the connecting plate to form a ring-shaped interface seat.

[0019] Preferably, the deformable tube is a plastic coil or a rubber tube, and the precast tube and the interface seat are precast with concrete; when processing the precast tube, the ends of the deformable tube are embedded in the wall of the precast tube, and the ball interface is precast integrally with the precast tube.

[0020] Preferably, the length of the deformable tube is 0.5-0.8m, and the length of the precast tube is 2-5m.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model, by setting a deformation pipe in the drainage pipe, setting a ball interface to cooperate with the ball cavity and leaving a movable gap, and filling the movable gap with a sealing component, enables the drainage pipe to not only have a strong posture adjustment capability, but also to ensure the sealed connection of each drainage pipe. It can avoid the phenomenon of leakage at the interface of the drainage pipe due to defects such as cracking, misalignment, and disconnection. Moreover, since the ball interface is covered by the interface seat, the interface seat can resist the stress concentration generated by the outside on the ball interface, so as to avoid cracking at the pipe interface.

[0023] 2. This utility model, by setting up a grouting groove, a grout-stopping groove, an annular rubber grout-stopping strip, and a grouting pipe in combination, allows grout to be injected into the grouting groove through the grouting pipe when the seal between the ball joints fails. This causes the grout to fill and solidify in the grouting groove and the joint between the ball joint and the joint seat, thereby permanently sealing the ball joint and the joint seat and solving the problem of water leakage at the joint.

[0024] 3. This utility model has an ingenious structural design, requiring no complex modifications to conventional urban underground drainage pipes. The construction and installation methods are simple, making it highly valuable for promotion and practical application. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0026] Figure 2 This is the front view of the present invention;

[0027] Figure 3 This is a schematic diagram of the main structure of the drainage pipe.

[0028] Figure 4 This is a sectional view of the interface connector;

[0029] Figure 5This is a schematic diagram showing the ball joint being embedded in the interface socket.

[0030] Figure 6 for Figure 5 Cross-sectional view at point AA;

[0031] Figure 7 This is a schematic diagram of the structure in which the left ball joint rotates relative to the joint seat;

[0032] Figure 8 This is a schematic diagram of grouting into the grouting trench;

[0033] Figure 9 A three-dimensional structural diagram of the interface socket and ball joint;

[0034] Figure 10 This is a diagram showing the usage state of this utility model;

[0035] Figure 11 This is a construction flowchart of this utility model;

[0036] The meanings of the labels in the above figures are as follows: Drainage pipe 1, Deformation pipe 101, Precast pipe 102, Ball joint 103, Grouting groove 1031, Grouting pipe 1032, Sealing channel 1033, Interface seat 2, Ball joint cavity 201, Grout stop groove 2011, Annular rubber grout stop strip 2012, Connecting port 202, Movable joint 203, Sealing component 3, Rubber sealing ring 301, Deformation cavity 302, Flowing medium 303, Medium conveying pipe 304, Valve 305, Sealing rubber plate 4, Lower ring seat 5, Connecting plate 6, Upper ring seat 7, Sand and gravel cushion layer 8, Concrete pillow base 9, Grout 10. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are merely illustrative examples of the present invention, but the scope of protection of the present invention is not limited thereto. The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] This embodiment provides an interface attitude adaptive connection structure for urban underground drainage pipes. Please refer to [link / reference]. Figures 1 to 9 It includes a drainage pipe 1, an interface seat 2, and a sealing assembly 3;

[0040] The interface seat 2 has a spherical ball cavity 201 inside, and the interface seat 2 has symmetrical cuts on both sides so that the ball cavity 201 forms a horizontally through-hole 202 on both sides.

[0041] The drainage pipe 1 includes a bendable and telescopic deformable pipe 101 and prefabricated pipes 102 connected to both ends of the deformable pipe 101; a ball interface 103 is provided at one end of the prefabricated pipe 102 away from the deformable pipe 101, and the outer surface of the ball interface 103 protrudes outward to form a partially spherical structure that is adapted to the ball cavity 201 inside the interface seat 2.

[0042] The ball joints 103 of the drainage pipes 1 located on the left and right sides of the interface seat 2 are respectively inserted into the ball joint cavity 201 from the corresponding side connection port 202, and a movable gap 203 is left between the end faces of the ball joints 103 that are inserted into each other. The sealing component 3 fills the movable gap 203, thereby sealing and connecting the drainage pipes 1 on the left and right sides of the interface seat 2.

[0043] In the above structure of this embodiment:

[0044] Because one end of the prefabricated pipe 102 is provided with a ball joint 103, and the outer surface of the ball joint 103 protrudes outward to form a partially spherical structure that is adapted to the ball cavity 201 inside the interface seat 2, when the ball joint 103 is embedded in the ball cavity 201, the ball joint 103 and the interface seat 2 can rotate relative to each other within a certain range. In this way, the drainage pipe 1 can adjust its posture with the interface seat 2 as the fulcrum. In addition, since the ball joint 103 is covered by the interface seat 2, the interface seat 2 can resist the stress concentration generated by the outside on the ball joint 103 to avoid cracking at the pipe joint.

[0045] Because the deformation tube 101 can stretch and bend, the deformation tubes 101 at both ends are flexibly connected through the deformation tube 101, and the prefabricated pipes 102 can deflect, so that the drainage pipe 1 itself also has a certain posture adjustment capability, and at the same time, the drainage pipe 1 can adapt to the angle rotation of the ball interface 103 relative to the interface seat 2.

[0046] Since there is a movable gap 203 between the end faces of the interlocking ball interfaces 103, firstly, the ball interfaces 103 on both sides have room to rotate within the ball interface cavity 201, and secondly, the sealing component 3 can be filled in the movable gap 203 to keep the interlocking ball interfaces 103 sealed.

[0047] Based on the above, in this utility model, by setting a deformation pipe 101 in the drainage pipe 1, setting a ball interface 103 to cooperate with the ball cavity 201 and leaving a movable gap 203, and filling the movable gap 203 with a sealing component 3, the drainage pipe 1 can not only have a strong interface posture adjustment capability, but also ensure the sealed connection of each drainage pipe 1, and avoid the phenomenon of leakage at the interface position caused by defects such as cracking, misalignment, and disconnection of the drainage pipe interface.

[0048] Furthermore, in a preferred embodiment, please refer to Figure 1 , Figure 5 and Figure 6 The sealing assembly 3 includes a rubber sealing ring 301 with a circular cross-section that is filled in the movable joint 203. The rubber sealing ring 301 has a circumferentially through deformation cavity 302 inside, and the deformation cavity 302 is filled with a flowing medium 303.

[0049] This structure allows for the filling of a suitable amount of flowing medium 303 into the deformation cavity 302, causing the rubber sealing ring 301 to expand to a suitable volume and fill the movable joint 203. The flowing medium 303 can be gaseous or liquid, for example, it can be air, water, paraffin oil, etc. When the interface seat 2 and the ball interfaces 103 on both sides do not rotate relative to each other, the movable joint 203 is a regular annular space. The rubber sealing ring 301 is filled in the movable joint 203 in a regular annular shape, and its two sides abut against the end faces of the ball interfaces 103, thereby keeping the interlocking ball interfaces 103 sealed. When the interface seat 2 rotates relative to one or both ball interfaces 103, the spatial shape of the movable joint 203 changes, and the movable joint 203 restricts the shape of the rubber sealing ring 301. The flowing medium in the deformation cavity 302 causes the shape of the rubber sealing ring 301 to change synchronously and fill the movable joint 203, thereby keeping the interlocking ball interfaces 103 sealed.

[0050] Furthermore, in a preferred embodiment, please refer to Figure 4 and Figure 5 The end face of the ball joint 103 is provided with a sealing groove 1033 adapted to the rubber sealing ring 301, and the two sides of the rubber sealing ring 301 are embedded and abut against the sealing groove 1033. With this structure, the contact area between the rubber sealing ring 301 and the end face of the ball joint 103 is larger and the sealing effect is better. In addition, the sealing groove 1033 limits the rubber sealing ring 301 from detaching from the end face of the ball joint 103.

[0051] Furthermore, in a preferred embodiment, please refer to Figure 1 , Figure 5 and Figure 6The present invention also includes a sealing rubber plate 4, which overlaps circumferentially between the inner walls of the interlocking ball joints 103 to shield the movable joint 203 and the rubber sealing ring 301 filled in the movable joint 203. With this structure, the shielding protection of the sealing rubber plate 4 can prevent the rubber sealing ring 301 from being washed away by the water flow or impurities in the water flow and thus breaking, and can prevent impurities in the water flow from entering the movable joint 203 and affecting the seal. In addition, the sealing rubber plate 4 is made of rubber and has a certain degree of elasticity, which can adapt to the changes in the spacing between the inner walls of the interlocking ball joints 103.

[0052] Furthermore, in a preferred embodiment, please refer to Figure 5 The sealing assembly 3 further includes a medium delivery pipe 304, which seals through the rubber sealing ring 301 and communicates with the deformation cavity 302. A valve 305 is provided on the medium delivery pipe 304. With this structure, when installing the sealing assembly 3, a small amount of flowing medium is injected into the rubber sealing ring 301 or no flowing medium is injected to reduce the volume of the rubber sealing ring 301. Then, the rubber sealing ring 301 is installed into the movable joint 203. After that, an appropriate amount of flowing medium is injected into the deformation cavity 302 through the medium delivery pipe 304 so that the rubber sealing ring 301 expands and fills the movable joint 203, so that the interlocking ball interfaces 103 are sealed, thereby completing the installation of the sealing assembly 3. When the flowing medium in the deformation cavity 302 is lost during the use of the drainage pipe, an appropriate amount of flowing medium can be injected into the deformation cavity 302 through the medium delivery pipe 304 to replenish it, so as to ensure the sealing function of the rubber sealing ring 301.

[0053] Furthermore, in a preferred embodiment, please refer to Figure 3 and Figure 5 The outer spherical surface of the ball joint 103 is provided with a circumferentially penetrating grouting groove 1031, and the bottom of the grouting groove 1031 is connected to a grouting pipe 1032 that penetrates the wall of the ball joint 103 and extends into the interior of the drainage pipe; with this structure, as Figure 8 As shown, when necessary, for example, when leakage occurs at the connection between the ball joint 103 and the interface seat 2, grout can be injected into the grouting groove 1031 through the grouting pipe 1032 so that the grout 10 fills and solidifies in the grouting groove 1031 and the joint between the ball joint 103 and the interface seat 2, thereby permanently sealing the ball joint 103 and the interface seat 2 to solve the problem of water leakage at the joint.

[0054] Furthermore, in a preferred embodiment, please refer to Figure 3 and Figure 5The ball joint cavity 201 has two circumferentially continuous grout-stopping grooves 2011 on the cavity wall that is fitted with the ball joint 103. The grouting groove 1031 is located between the two grout-stopping grooves 2011, and an annular rubber grout-stopping strip 2012 is provided in the grout-stopping groove 2011. With this structure, the main function of the annular rubber grout-stopping strip 2012 and the grout-stopping groove 2011 is to prevent grout from overflowing when grouting is performed in the grouting groove 1031, so as to ensure that the grout fills the joint between the ball joint 103 and the joint seat 2. In addition, when the grouting groove 1031 is not grouted, the ball joint 103 and the joint seat 2 can also be sealed. That is, when the sealing component 3 fails, the cooperation between the annular rubber grout-stopping strip 2012 and the grout-stopping groove 2011 can play a secondary sealing role to prevent leakage at the joint.

[0055] To facilitate the installation of the interface socket 2 and the insertion of the ball interface 103, further, in a preferred embodiment, please refer to... Figure 6 and Figure 9 The interface seat 2 includes an upper ring seat 7 and a lower ring seat 5 arranged symmetrically. A connecting plate 6 is provided on the outer side of the ring end of the upper ring seat 7 and the lower ring seat 5. Bolt holes are provided on the connecting plate 6. The upper ring seat 7 and the lower ring seat 5 are spliced ​​together with bolts through the bolt holes on the connecting plate 6 to form a ring-shaped interface seat 2.

[0056] Furthermore, in a preferred embodiment, the deformable pipe 101 is a plastic coil or a rubber pipe, and the precast pipe 102 and the interface seat 2 are uniformly precast using concrete; when processing the precast pipe 102, the pipe ends of the deformable pipe 101 are embedded in the pipe wall of the precast pipe 102, and the ball interface 103 is precast integrally with the precast pipe 102; wherein, the precasting method of the precast pipe 102 adopts the conventional processing method of concrete drainage pipes in the art, and this utility model will not be further described.

[0057] Furthermore, in a preferred embodiment, the length of the deformable tube 101 is 0.5-0.8m, and the length of the prefabricated tube 102 is 2-5m.

[0058] Example 2

[0059] Based on the interface attitude adaptive urban underground drainage pipe connection structure provided in Embodiment 1, this embodiment illustrates its effectiveness in dealing with uneven foundation settlement.

[0060] like Figure 10As shown, after uneven settlement of the foundation, the connection structure of the urban underground drainage pipe undergoes adaptive attitude adjustment. Specifically, the right end ball joint 103 of drainage pipe G2 rotates within the joint seat J3, the right precast pipe 102 in drainage pipe G2 deflects downward relative to the deformation pipe 101, the left end ball joint 103 of drainage pipe G5 rotates within the joint seat J5, and the left precast pipe 102 in drainage pipe G5 deflects downward relative to the deformation pipe 101. The positions of drainage pipes G3 and G4 corresponding to the foundation settlement area sink, thereby avoiding defects such as cracking, misalignment, and disconnection of pipe joints in joint seats J2, J3, J4, J5, and J6 in the foundation settlement area.

[0061] Example 3

[0062] Based on Embodiment 1, this embodiment provides a construction method for an interface attitude-adaptive urban underground drainage pipeline connection structure, such as... Figure 11 As shown, the details are as follows:

[0063] S1, Measurement and Setting Out

[0064] According to the design, pipeline center stakes should be installed every 10-20m. Additional center stakes should be installed at inspection wells and pipe diameter changes, and longitudinal profile diagrams should be drawn to record elevation data.

[0065] S2, Trench Excavation

[0066] When excavating mechanically, the slope ratio should be controlled, and the bearing capacity of the foundation at the bottom of the trench should be tested. If the bearing capacity does not meet the standard, a crushed stone cushion layer should be backfilled and the test should be repeated.

[0067] S3, Basic Processing

[0068] After the bottom of the trench is compacted, a sand and gravel cushion layer 8 is laid to ensure the stability of the pipeline foundation. A concrete pillow base 9 is poured at the position of the deformation pipe 101. The width of the concrete pillow base 9 is greater than the length of the deformation pipe 101 to ensure that the concrete pillow base 9 has an overlap length of 10-20cm with the precast pipes on both sides. A lower ring seat 5 is installed at the pipeline interface position.

[0069] S4. Pipeline laying

[0070] S41. Lift the next section of the drainage pipe, loop the annular rubber grout stop 2012 around the outside of part of the spherical structure of the ball joint 103, lower the drainage pipe, and when the ball joint 103 approaches the lower ring seat 5, adjust the position of the annular rubber grout stop 2012 so that the annular rubber grout stop 2012 is aligned with the grout stop groove 2011 on the lower ring seat 5. Continue to slowly lower the drainage pipe so that the ball joints 103 at both ends of the drainage pipe are lowered and installed in the lower ring seat 5. At this time, the annular rubber grout stop 2012 is embedded in the grout stop groove 2011 on the lower ring seat 5, while the deformation pipe 101 is supported by the concrete pillow base 9.

[0071] S42. Install the upper ring seat 7 onto the lower ring seat 5 through the bolt holes on the connecting plate 6 and the bolts, and align the annular rubber grout stop strip 2012 with the grout stop groove 2011 of the upper ring seat 7. At this time, the upper ring seat 7 and the lower ring seat 5 are spliced ​​together to form the interface seat 2. The ball interface 103 of the next section of the drainage pipe and the ball interface 103 of the previous section of the drainage pipe are respectively embedded in the ball interface cavity 201 from the corresponding side of the connecting port 202, and a movable gap 203 is left between the end faces of the ball interfaces 103 that are embedded in each other.

[0072] S43. Insert a rubber sealing ring 301 with only a small amount of flowing medium or no flowing medium into the movable joint 203 from inside the pipeline. Then, slowly inject flowing medium into the deformation cavity 302 of the rubber sealing ring 301 through the medium delivery pipe 304. During this process, the rubber sealing ring 301 should always be kept in the movable joint 203 to prevent it from slipping out. After a suitable amount of flowing medium is injected into the deformation cavity 302, close the valve 305 on the medium delivery pipe 304. The rubber sealing ring 301 will expand and fill the movable joint 203 between the end faces of the ball joints 103. The rubber sealing ring 301 will be embedded and abut against the sealing grooves 1033 on both sides of the ball joint 103 end faces to keep the interlocking ball joints 103 sealed. During this process, the expansion degree of the rubber sealing ring 301 can be controlled by real-time monitoring of the pressure of the flowing medium in the deformation cavity 302 of the rubber sealing ring 301 or real-time monitoring of the injection volume of the flowing medium.

[0073] S44. The sealing rubber sheet 4 is circumferentially overlapped between the inner walls of the interlocking ball joint 103 from the inside of the pipe to cover the movable joint 203 and the rubber sealing ring 301 filled in the movable joint 203.

[0074] The drainage pipes are hoisted and laid section by section in a cyclical manner, following steps S41-S44.

Claims

1. An interface attitude adaptive urban underground drainage pipe connection structure, characterized in that, Includes drainage pipes, interface seats, and sealing components; The interface seat has a spherical ball-connecting cavity inside, and the interface seat has symmetrical cuts on both sides to form a horizontally through-hole on both sides of the ball-connecting cavity; The drainage pipe includes a flexible and expandable deformable pipe and prefabricated pipes connected to both ends of the deformable pipe; a ball joint is provided at the end of the prefabricated pipe away from the deformable pipe, and the outer surface of the ball joint bulges outward to form a partially spherical structure that is adapted to the ball joint cavity inside the joint seat. The ball joints of the drainage pipes located on the left and right sides of the interface seat are respectively inserted into the ball joint cavity from the corresponding side connection port, and there is a movable gap between the end faces of the ball joints that are inserted into each other. The sealing component fills the movable gap, thereby sealing and connecting the drainage pipes on the left and right sides of the interface seat.

2. The interface attitude adaptive urban underground drainage pipeline connection structure as described in claim 1, characterized in that, The sealing assembly includes a rubber sealing ring with a circular cross-section that is filled in the movable joint. The rubber sealing ring has a circumferentially through deformation cavity inside, and the deformation cavity is filled with a flowing medium.

3. The interface attitude adaptive urban underground drainage pipeline connection structure as described in claim 2, characterized in that, The end face of the ball interface is provided with a sealing groove adapted to the rubber sealing ring, and the two sides of the rubber sealing ring are embedded and abut against the sealing groove.

4. The interface attitude adaptive urban underground drainage pipeline connection structure as described in claim 3, characterized in that, It also includes a sealing rubber sheet, which overlaps circumferentially between the inner walls of the interlocking ball joints to cover the movable seam and the rubber sealing ring filling the movable seam.

5. The interface attitude adaptive urban underground drainage pipeline connection structure as described in claim 3, characterized in that, The sealing assembly also includes a medium delivery pipe, which is sealed through a rubber sealing ring and communicates with the deformation cavity. A valve is provided on the medium delivery pipe.

6. The interface attitude adaptive urban underground drainage pipeline connection structure as described in claim 1, characterized in that, A circumferentially continuous grouting groove is provided on the outer spherical surface of the ball joint, and a grouting pipe that penetrates the wall of the ball joint and extends into the drainage pipe is connected to the bottom of the grouting groove.

7. The interface attitude adaptive urban underground drainage pipeline connection structure as described in claim 6, characterized in that, The ball joint cavity has two circumferential through-grooves on the cavity wall that is fitted with the ball joint. The grouting groove is located between the two grouting grooves, and an annular rubber grouting strip is installed in the grouting groove.

8. The interface attitude adaptive urban underground drainage pipeline connection structure as described in claim 1, characterized in that, The interface seat includes an upper ring seat and a lower ring seat arranged symmetrically. A connecting plate is provided on the outer side of the ring end of the upper ring seat and the lower ring seat. Bolt holes are provided on the connecting plate. The upper ring seat and the lower ring seat are spliced ​​together with bolts through the bolt holes on the connecting plate to form a ring-shaped interface seat.

9. The interface attitude adaptive urban underground drainage pipeline connection structure as described in claim 1, characterized in that, The deformable tube is a plastic coil or a rubber tube, and the precast tube and the interface seat are made of precast concrete. When processing the precast tube, the ends of the deformable tube are embedded in the wall of the precast tube, and the ball interface is precast integrally with the precast tube.

10. A city underground drainage pipeline connection structure with adaptive interface posture as described in any one of claims 1-9, characterized in that, The length of the deformable tube is 0.5-0.8m, and the length of the prefabricated tube is 2-5m.

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