Self-anchoring joint for top or side pipe

Abstract

This utility model discloses a self-anchoring interface for a dual-purpose (top-and-pull) pipe, including a spigot, a pipe body, a socket, a push flange, and a push retaining ring. The spigot is coaxially fixed to one end of the pipe body. The push flange and push retaining ring are fixed to the outer surface of the pipe body, with the push flange closer to the spigot than the push retaining ring. The spigot is inserted into the socket, and the outer diameter of the spigot is equal to or greater than the outer diameter of the pipe body. The push flange and the socket end faces are fitted together and connected. This utility model can be inserted into the installation hole by either pushing or pulling. The self-anchoring interface requires simple components, is easy to install, has low overall cost, and high interface strength.

Description

Technical Field

[0001] This utility model belongs to the field of pipe technology, specifically a self-anchoring interface for a top-and-tow dual-purpose pipe. Background Technology

[0002] Trenchless construction refers to a new technology for laying, replacing, and repairing various underground pipelines with minimal surface excavation (generally referring to small-area excavation at the entrance and exit). In trenchless engineering, pipe jacking and pipe pulling are two commonly used techniques for laying pipes. Pipe jacking uses hydraulic jacks or other jacking equipment to push prefabricated pipes section by section from the starting shaft into the soil layer until reaching the receiving shaft, ultimately forming the underground pipeline. Pipe pulling requires connecting adjacent pipes, with the connection joint forming a self-anchoring interface, thus pulling the pipes sequentially into the installation hole. Pipe jacking products generally do not have self-anchoring capabilities and cannot be used as pull-out pipes. For pull-out pipes, if the self-anchoring interface fails during pulling, causing adjacent pipes to detach, the pipes already pulled into the hole must be pulled out, reconnected, and the pulling process restarted. This significantly reduces construction efficiency and increases costs. To improve the strength of the connection interface, some existing self-anchoring interfaces are quite complex. However, the connection of adjacent pipes is carried out and completed on the construction site, where the equipment and technical level of the construction personnel are limited. Therefore, it is best to make the connection interface of adjacent pipes strong and simple. Utility Model Content

[0003] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide a self-anchoring interface for a dual-purpose top-and-pull pipe, which can be inserted into the installation hole by either pushing or pulling. The self-anchoring interface requires simple components, is easy to install, has low overall cost, and high interface strength.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A self-anchoring interface for a dual-purpose pipe includes a spigot, a pipe body, a socket, a push flange, and a push retaining ring. The spigot is coaxially fixed to one end of the pipe body. The push flange and the push retaining ring are fixed to the outer surface of the pipe body. The push flange is closer to the spigot than the push retaining ring. The spigot is inserted into the socket, and the end faces of the push flange and the socket are fitted together and connected.

[0006] As a further improvement to the above technical solution:

[0007] The outer diameter of the spigot is equal to or greater than the outer diameter of the pipe body. When the outer diameter of the spigot is greater than the outer diameter of the pipe body, the end face of one end of the push flange contacts the stepped surface of the spigot that protrudes from the pipe body and is parallel to the radial direction of the spigot.

[0008] The self-anchoring interface also includes a connector. The push flange is fixed to the socket through the connector. The connector passes through the push flange and is inserted into the socket from the end face of the socket.

[0009] There are multiple connectors, which are arranged at intervals on the same ring.

[0010] The socket is provided with a blind fastening hole for inserting the connector. The fastening hole is formed by recessing from the end face of the socket.

[0011] The self-anchoring interface also includes multiple connecting ribs, which are fixed to the outer surface of the pipe body. The two ends of the connecting ribs are respectively connected to the push flange and the push retaining ring. The connecting parts and connecting ribs are arranged alternately along the circumference of the pipe body.

[0012] The outer diameters of the socket are not completely equal at different points, but the outer diameters of the push flange, the push retaining ring, and the outer diameter at the point where the socket has the largest outer diameter are all equal.

[0013] The outer wall of the socket is a protrusion from the end face of the socket to the middle of the outer wall. The outer diameter of the socket at the protrusion is equal to the outer diameter of the push flange. A concrete sleeve is provided between the outer wall protrusion and the push ring of the same pipe material. The outer diameter of the concrete sleeve is equal to the outer diameter of the push ring.

[0014] The self-anchoring interface further includes a first sealing ring, which is pressed between the spigot and the socket; or it includes a first sealing ring and a second sealing ring, which are pressed between the spigot and the socket, with the first and second sealing rings spaced apart along the axial direction of the spigot, and the second sealing ring also contacting the push flange.

[0015] A reinforcing rib is also fixedly installed on the outer surface of the tube body. The reinforcing rib is located on the side of the push-stop ring away from the socket, and the reinforcing rib connects the push-stop ring and the tube body.

[0016] The beneficial effects of this utility model are:

[0017] (1) In trenchless engineering, the pipe can be entered into the installation hole by jacking and dragging, and can be used as a jacking pipe and a dragging pipe, which improves the adaptability of the pipe to different construction environments and occasions.

[0018] (2) The connection interface of two adjacent pipes forms a self-anchoring interface, which allows the pipes to be used as drag pipes during construction. The self-anchoring interface prevents the two adjacent pipes from separating due to external forces during use.

[0019] (3) The push flange and the socket end face contact and transmit the force to realize the sequential push of the pipe. The push flange and the socket end face have a large contact area and uniform force. The push flange is welded to the pipe body, resulting in high overall strength and reliability.

[0020] (4) The push flange, connectors and socket contact and transmit force to realize the sequential dragging of the pipe. Multiple connectors are evenly spaced on the end face of the socket, so the force is uniform and the dragging is stable.

[0021] (5) The outer diameter of the spigot can be set to be the same as that of the pipe body or larger than that of the pipe body. When the outer diameter of the spigot is larger than that of the pipe body, the inner wall of the push flange contacts the pipe body, and one end face contacts the pipe body. The spigot and the pipe body are each part of the main body of the pipe, which increases their strength. This improves the overall strength and reliability of the self-anchoring interface and is suitable for large-diameter pipes. In addition, when the outer diameter of the spigot is larger than that of the pipe body, the outer diameter of the spigot is smaller than that of the push flange. This is equivalent to the spigot contacting a part of the push flange's end face near the central axis, which is equivalent to adding a counterweight to the part of the push flange near the central axis. The above setting makes the torque required for the push flange to rotate greater, thereby making the push flange more stable and less likely to come off from the set position.

[0022] (6) The jacking flange and the jacking retaining ring are connected by a connecting rib, which is also connected to the pipe body, making the overall strength of the jacking flange, the jacking retaining ring and the self-anchoring interface greater.

[0023] (7) The first and second sealing rings form a double seal, which does not affect the construction and use of the pipe and improves the sealing reliability of the pipe.

[0024] (8) The self-anchored interface requires simple components and is easy to install. The overall cost is low and the interface strength is high, which greatly reduces the probability of rework due to interface detachment during construction. It has low requirements for installation equipment and personnel technical level and is suitable for on-site installation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the pipe structure according to Embodiment 1 of this utility model.

[0026] Figure 2 This is a schematic diagram of the self-anchoring interface of Embodiment 1 of this utility model.

[0027] Figure 3 yes Figure 2 A schematic diagram of the AA cross-section.

[0028] Figure 4 This is a schematic diagram of the pipe structure according to Embodiment 2 of this utility model.

[0029] Figure 5 This is a schematic diagram of the self-anchoring interface of Embodiment 2 of this utility model.

[0030] Figure 6 This is a schematic diagram of the pipe structure according to Embodiment 3 of this utility model.

[0031] Figure 7This is a schematic diagram of the self-anchoring interface of Embodiment 3 of this utility model.

[0032] Figure 8 This is a schematic diagram of the pipe structure of Embodiment 4 of this utility model.

[0033] Figure 9 This is a schematic diagram of the self-anchoring interface of Embodiment 4 of this utility model.

[0034] Reference numerals: 1. Socket; 101. Socket reinforcing ring; 2. Socket; 21. First sealing groove; 22. Fastening hole; 23. Outer wall protrusion; 24. Second sealing groove; 25. Blocking part; 3. Pipe body; 4. Push flange; 5. Push retaining ring; 6. Connecting rib; 7. Reinforcing rib; 8. Concrete sleeve; 9. Connecting piece; 10. First sealing ring; 11. Second sealing ring. Detailed Implementation

[0035] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] Example 1

[0038] A self-anchoring interface for a top-and-tow dual-purpose pipe, such as Figure 1 As shown, the pipe includes a spigot 1, a pipe body 3, and a socket 2 connected coaxially in sequence. Both the spigot 1 and the pipe body 3 are cylindrical structures.

[0039] In this embodiment, the inner and outer diameters of the socket 1 are equal to the inner and outer diameters of the tube body 3, respectively, and the outer diameter of the socket 2 is greater than the outer diameter of the tube body 3.

[0040] The outer surface of the pipe body 3 is fixedly installed with a push flange 4, a push retaining ring 5, a connecting rib 6, a reinforcing rib 7, and a concrete sleeve 8.

[0041] The push flange 4 and the push retaining ring 5 are arranged at intervals, with the push flange 4 being closer to the socket 1 than the push retaining ring 5.

[0042] In this embodiment, both the push flange 4 and the push retaining ring 5 are annular structures made of metal. The push flange 4 and the push retaining ring 5 are coaxially fixedly sleeved on the outer surface of the pipe body 3, that is, the inner surfaces of the push flange 4 and the push retaining ring 5 are in contact with the outer surface of the pipe body 3.

[0043] The outer diameter of the push flange 4 is equal to the outer diameter of the push retaining ring 5. The width of the push retaining ring 5 is approximately equal to the width of the push flange 4. The width of the push retaining ring 5 refers to its axial dimension, and the width of the push flange 4 refers to its axial dimension.

[0044] In this embodiment, the push flange 4 and the push retaining ring 5 are welded to the pipe body 3.

[0045] Connecting rib 6 is connected to the pipe body 3. Connecting rib 6 is located between the jacking flange 4 and the jacking retaining ring 5, with its two ends connected to the jacking flange 4 and the jacking retaining ring 5 respectively. Connecting rib 6 has a plate-like or frame-like structure, and multiple connecting ribs 6 are provided, arranged at intervals along the circumference of the pipe body 3, such as... Figure 2 and 3 As shown.

[0046] A concrete sleeve 8 is fitted onto a portion of the pipe body 3 and a portion of the socket 2. Specifically, the outer wall of the socket 2, from its end face to its middle, is a protrusion 23. The outer diameter of this protrusion 23 is larger than the outer diameter of the socket 2 elsewhere. The outer diameter of the push-resist ring 5 is equal to the outer diameter of the socket 2 at the protrusion 23. This creates a recessed space between the protrusion 23 and the push-resist ring 5 for the concrete sleeve 8. The concrete sleeve 8 fits between the protrusion 23 and the push-resist ring 5, and its outer diameter is equal to either the push-resist ring 5 or the protrusion 23. The main material of the concrete sleeve 8 is cement mortar.

[0047] The reinforcing rib 7 is used to improve the installation strength of the push-pull retaining ring 5. The reinforcing rib 7 is located on the side of the push-pull retaining ring 5 away from the spigot 1. The reinforcing rib 7 is a plate-like structure or a frame structure, and it connects the push-pull retaining ring 5 and the pipe body 3. There are multiple reinforcing ribs 7, which are arranged at intervals along the circumference of the pipe body 3. Cement mortar can be filled between adjacent reinforcing ribs 7, meaning that the reinforcing ribs 7 do not affect the installation of the concrete sleeve 8.

[0048] The middle part of the inner wall of the socket 2 is provided with a first sealing groove 21. The first sealing groove 21 is equivalent to a groove provided on the inner wall of the socket 2, that is, it is formed by recessing from the inner wall of the socket 2. Specifically, it is a groove that runs around the circumference of the inner wall of the socket 2.

[0049] The pipe can be a socket-type pipe, a straight pipe, or other irregularly shaped pipe.

[0050] In this embodiment, the pipe is a socket-type pipe.

[0051] When two adjacent pipes are connected, the spigot 1 of one pipe is inserted into the socket 2 of the other pipe, and with the cooperation of other auxiliary parts, the self-anchoring interface is formed.

[0052] The self-anchoring interface is as follows: Figure 2 and 3 As shown, it includes a spigot 1, a socket 2, a pipe body 3, a push flange 4, a push retaining ring 5, a connecting rib 6, a connector 9, and a first sealing ring 10. The spigot 1 is inserted into the socket 2. The spigot 1 and socket 2 of the self-anchoring interface are the spigot 1 and socket 2 of two adjacent pipes, respectively. The spigot 1 and pipe body 3 belong to the spigot 1 and pipe body 3 of the same pipe.

[0053] The outer diameter of the socket 1 of the self-anchoring interface is smaller than the inner diameter of the socket 2.

[0054] The push flange 4 is fixedly connected to the end face of the socket 2. Specifically, the push flange 4 is fixed to the socket 2 by the connector 9. The connector 9 passes through the push flange 4 and is inserted into the socket 2 from the end face of the socket 2.

[0055] Multiple connectors 9 are provided, and the multiple connectors 9 are arranged at intervals on the same ring. Correspondingly, the socket 2 is provided with a blind fastening hole 22 for the connectors 9 to be inserted, and the fastening hole 22 is formed recessed from the end face of the socket 2.

[0056] In this embodiment, the connector 9 and the connecting rib 6 are arranged alternately along the circumference of the pipe body 3, that is, each connector 9 is located between two adjacent connecting ribs 6, and each connecting rib 6 is located between two adjacent connectors 9.

[0057] In this embodiment, the connector 9 is a bolt, including an integrally connected bolt head and threaded rod. The threaded rod passes through the push flange 4, but the bolt head cannot pass through the push flange 4. That is, the push flange 4 has a through hole, through which the threaded rod of the connector 9 can pass, but the bolt head cannot pass through the through hole.

[0058] The distance between the push-back ring 5 and the push-back flange 4 shall not be less than the length of the connector 9, so that the connector 9 can be installed smoothly.

[0059] The first sealing groove 21 is used to install the first sealing ring 10 to achieve sealing after the connection of two adjacent pipes. The first sealing ring 10 is pressed between the spigot 1 and the socket 2.

[0060] Based on the above structure, the working principle and method for connecting adjacent pipes are as follows:

[0061] The first step is in the first tube ( Figure 2The first sealing ring 10 is installed in the first sealing groove 21 of the pipe where the middle socket 2 is located. The second step is to install the second pipe ( Figure 2 The spigot 1 of the pipe containing the spigot 1 is inserted into the socket 2 until the push flange 4 of the second pipe contacts the end face of the socket 2 of the first pipe. Third, align the through holes on the push flange 4 with the fastening holes 22 on the end face of the socket 2, and insert the connector 9 between the push flange 4 and the push retaining ring 5, then pass it through the push flange 4 and insert it into the fastening hole 22. Thus, the first and second pipes are connected to form a self-anchoring interface.

[0062] Based on the aforementioned self-anchoring interface and pipe connection method, when the pipe is used for pipe jacking construction, the first pipe is first pushed into the installation hole, and then the second pipe is connected to the first pipe according to the first and second steps of the connection method described above. Then, the second pipe is pushed, at which point the pushing flange 4 applies a thrust to the end face of the socket 2 that contacts it. In other words, when used as a pipe jacking system, the connector 9 does not need to be installed. If the connector 9 is installed, adjacent pipes will be locked together by the self-anchoring interface during use and will not separate.

[0063] When the pipe is used as a drag pipe in construction, adjacent pipes are connected according to the above connection method to form a structure as shown. Figure 3 As shown in the diagram, the self-anchoring interface is then used. Pulling the first pipe to the right will cause the first pipe to pull the second pipe to move to the right, or pulling the second pipe to the left will cause the second pipe to pull the first pipe to move to the left. In this way, multiple pipes connected in sequence are pulled into the installation holes.

[0064] During the above construction process, due to the presence of the concrete sleeve 8, except between two adjacent connecting bars 6, the outer diameter of each pipe after connection is equal everywhere, which greatly reduces the forward resistance of the pipe in the installation hole.

[0065] Example 2

[0066] Unlike Embodiment 1, this embodiment features a spigot 1 and a push flange 4. Specifically, the outer diameter of the spigot 1 is larger than the outer diameter of the pipe body 3 and smaller than the inner diameter of the socket 2. For example... Figure 4 , 5 As shown. The socket 1 protrudes from the outer surface of the tube body 3 to form a stepped structure. The end face of the socket 1 away from the tube body 3 is the end face of the socket 1, and the end face or side face of the socket 1 connected to the tube body 3 is the stepped surface. That is, the stepped surface is formed by the socket 1 protruding from the surface of the tube body 3, and the plane on which the stepped surface is located is parallel to the radial direction of the socket 1.

[0067] A reinforcing ring 101 is fitted inside the socket 1 to enhance its strength. The reinforcing ring 101 can be integrally formed with the socket 1, essentially making them two layers of the same or different metal materials. Alternatively, the reinforcing ring 101 can be installed separately. When installed separately, the reinforcing ring 101 is annular, typically made of stainless steel, and possesses a certain degree of ductility and rigidity. The initial outer diameter of the reinforcing ring 101 is smaller than the inner diameter of the socket 1. During installation, the reinforcing ring 101 is placed inside the socket 1, and then its diameter is expanded using an expanding device until it is tightly pressed against the inner wall of the socket 1. The reason why the spigot reinforcing ring 101 can be pressed tightly against the inner wall of spigot 1 is that during the expansion process, the inner wall of spigot 1 will be subjected to radial pressure from the expansion equipment. After the pressure is removed (the expansion is completed), spigot 1 and spigot reinforcing ring 101 will have a certain elastic recovery. Since the wall of spigot 1 is thick and connected to the pipe body, the elastic recovery is greater than that of spigot reinforcing ring 101. After the recovery, spigot reinforcing ring 101 is pressed tightly against the inner wall of spigot.

[0068] In this embodiment, the push flange 4 is coaxially fixedly sleeved on the outer surface of the pipe body 3 and contacts the stepped surface of the socket 1 protruding from the pipe body 3.

[0069] Based on the above structure, when used as a drag pipe, the socket 2 applies a pulling force to the push flange 4 through the connector 9. The push flange 4 can transfer this pushing force to the pipe body 3 and the socket 1 that are in contact with it, which greatly improves the strength of the push flange 4 and the entire self-anchoring interface, making it more suitable for large-diameter pipes.

[0070] Example 3

[0071] Unlike Embodiment 1, in this embodiment, a second sealing groove 24 is also provided on the inner wall of the socket 2, such as... Figure 6 , 7 As shown. The second sealing groove 24 is used to install the second sealing ring 11. The second sealing ring 11 contacts the push flange 4, the socket 2 and the spigot 1 to prevent external sewage or other impurities from seeping into the pipe through the contact surface of the push flange 4 and the socket 2.

[0072] Specifically, the inner wall of the socket 2 is provided with a second sealing groove 24, a blocking portion 25, and a first sealing groove 21 sequentially from the end face away from the end face of the socket 2. The second sealing groove 24 and the first sealing groove 21 are equivalent to grooves provided in the inner wall of the socket 2, and the blocking portion 25 is equivalent to the part that is not recessed. That is, the inner diameter of the socket 2 at the second sealing groove 24 and the inner diameter of the first sealing groove 21 are both larger than the inner diameter of the socket 2 at the blocking portion 25.

[0073] The second sealing ring 11 is pressed between the outer wall of the spigot 1 and the inner wall of the socket 2 at the second sealing groove 24. The second sealing ring 11 contacts the push flange 4 without affecting the contact between the end faces of the push flange 4 and the socket 2.

[0074] Example 4

[0075] Unlike Embodiment 2, in this embodiment, a second sealing groove 24 is also provided on the inner wall of the socket 2, such as... Figure 8 , 9 As shown. The second sealing groove 24 is used to install the second sealing ring 11. The second sealing ring 11 contacts the push flange 4, the socket 2 and the spigot 1 to prevent external sewage or other impurities from seeping into the pipe through the contact surface of the push flange 4 and the socket 2.

[0076] Similar to Embodiment 3, the inner wall of the socket 2 is provided with a second sealing groove 24, a blocking part 25 and a first sealing groove 21 in sequence from the end face away from the end face of the socket 2. The inner diameter of the socket 2 at the second sealing groove 24 and the inner diameter of the first sealing groove 21 are both larger than the inner diameter of the socket 2 at the blocking part 25.

[0077] The second sealing ring 11 is pressed between the outer wall of the spigot 1 and the inner wall of the socket 2 at the second sealing groove 24. The second sealing ring 11 contacts the push flange 4 without affecting the contact between the end faces of the push flange 4 and the socket 2.

[0078] Finally, it is necessary to state that the above embodiments are only used to further illustrate the technical solution of this utility model in detail, and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made by those skilled in the art based on the above content of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A self-anchoring interface for a top-and-tow dual-purpose pipe, characterized in that, Includes a spigot (1), a pipe body (3), a socket (2), a push flange (4), and a push retaining ring (5). The spigot (1) is coaxially fixedly connected to one end of the pipe body (3). The outer diameter of the spigot (1) is equal to or greater than the outer diameter of the pipe body (3). The push flange (4) and the push retaining ring (5) are fixed on the outer surface of the pipe body (3). The push flange (4) is closer to the spigot (1) than the push retaining ring (5). The spigot (1) is inserted into the socket (2). The end faces of the push flange (4) and the socket (2) are attached and connected together.

2. The self-anchoring interface according to claim 1, characterized in that: When the outer diameter of the socket (1) is greater than the outer diameter of the pipe body (3), one end face of the push flange (4) contacts the step surface formed by the socket (1) protruding from the pipe body (3) and parallel to the radial direction of the socket (1).

3. The self-anchoring interface according to claim 1 or 2, characterized in that: The self-anchoring interface also includes a connector (9). The push flange (4) is fixed to the socket (2) through the connector (9). The connector (9) passes through the push flange (4) and is inserted into the socket (2) from the end face of the socket (2).

4. The self-anchoring interface according to claim 3, characterized in that: Multiple connectors (9) are provided, and multiple connectors (9) are arranged at intervals on the same ring.

5. The self-anchoring interface according to claim 3, characterized in that: The socket (2) is provided with a fastening hole (22) which is a blind hole for inserting the connector (9). The fastening hole (22) is formed by recessing from the end face of the socket (2).

6. The self-anchoring interface according to claim 3, characterized in that: The self-anchoring interface also includes multiple connecting ribs (6), which are fixed on the outer surface of the pipe body (3). The two ends of the connecting ribs (6) are respectively connected to the push flange (4) and the push retaining ring (5). The connector (9) and the connecting ribs (6) are arranged alternately along the circumference of the pipe body (3).

7. The self-anchoring interface according to claim 1 or 2, characterized in that: The outer diameters of the socket (2) are not completely equal at different points, but the outer diameters of the push flange (4), the push retaining ring (5), and the outer diameter of the socket (2) at its largest point are equal.

8. The self-anchoring interface according to claim 7, characterized in that: The outer wall of the socket (2) from the end face of the socket (2) to the middle of the outer wall is the outer wall protrusion (23). The outer diameter of the socket (2) at the outer wall protrusion (23) is equal to the outer diameter of the push flange (4). A concrete sleeve (8) is provided between the outer wall protrusion (23) and the push retaining ring (5) of the same pipe material. The outer diameter of the concrete sleeve (8) is equal to the outer diameter of the push retaining ring (5).

9. The self-anchoring interface according to claim 1 or 2, characterized in that: The self-anchoring interface also includes a first sealing ring (10), which is pressed between the socket (1) and the socket (2); or it includes a first sealing ring (10) and a second sealing ring (11), which are pressed between the socket (1) and the socket (2), and the first sealing ring (10) and the second sealing ring (11) are arranged axially along the socket (1), and the second sealing ring (11) also contacts the push flange (4).

10. The self-anchoring interface according to claim 1 or 2, characterized in that: A reinforcing rib (7) is also fixedly installed on the outer surface of the tube body (3). The reinforcing rib (7) is located on the side of the push-stop ring (5) away from the socket (1). The reinforcing rib (7) connects the push-stop ring (5) and the tube body (3).

Images