Anti-falling and anti-deflection self-anchoring connector of pipe

Abstract

The utility model discloses an anti-drop and anti-deflection self-anchored interface of tubular product, including spigot, pipe body, bellmouth, flange and connecting piece, the spigot is coaxially and fixedly connected with one end of pipe body, flange is fixed on the outer surface of pipe body, the spigot is inserted into the bellmouth, flange and bellmouth end face attach and are fixedly connected together through connecting piece. The two adjacent pipes are fixedly connected together through the self-anchoring connector, relative movement and relative deflection of the two adjacent pipes are avoided, needed parts are simple, installation is easy, the overall cost is low, the connector strength is high, the requirement for the technical level of installation equipment and personnel is low, and the self-anchoring connector is suitable for installation on a construction site.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipe technology field, concretely is a kind of pipe's anti-off anti-deflection self-anchoring interface. BACKGROUND

[0002] When installing pipe network system such as water pipe in factory park and other occasions, overhead installation is often needed, that is, pipe material for conveying gas, liquid or loose solid is erected above ground or water surface, and the corresponding pipe material is overhead pipe material. The connecting interface of adjacent two overhead pipe materials requires forming a self-anchoring interface and cannot be disconnected, in addition, adjacent two overhead pipe materials cannot be relatively deflected. In order to improve the strength of the connecting interface, some existing self-anchoring interfaces are relatively complex. However, the connection of adjacent pipe materials is carried out and completed at the construction site, and the on-site equipment and the technical level of construction personnel are limited, so it is best to make the connecting interface of adjacent pipe materials have high strength while being simple to connect. SUMMARY

[0003] In view of the above problems existing in the prior art, the utility model aims to provide a self-anchoring interface for pipe material, which can prevent disconnection and deflection. Adjacent two pipes are fixedly connected together through the self-anchoring interface, and adjacent two pipes will not move and deflect relatively. The self-anchoring interface is suitable for overhead pipe, flange and socket end surface contact and force transmission. The flange and socket end surface have a large contact area and bear force uniformly. The flange is welded on the pipe body, and the overall strength and reliability are high. The self-anchoring interface has a reinforcing rib, which connects the pipe body and the flange at the same time, so that the overall strength of the flange and the self-anchoring interface is greater. The self-anchoring interface needs simple components and is easy to install, has low overall cost, high interface strength, low requirement for installation equipment and personnel technical level, and is suitable for installation at the construction site.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A self-anchoring interface for pipe material, comprising a socket, a pipe body, a socket, a flange and a connecting piece. The socket is coaxially fixedly connected to one end of the pipe body. The flange is fixed to the outer surface of the pipe body. The socket is inserted into the socket. The flange and the socket end surface are in contact and fixedly connected together through the connecting piece. The outer diameter of the socket is equal to or greater than the outer diameter of the pipe body. When the outer diameter of the socket is greater than the outer diameter of the pipe body, the flange end surface contacts the step surface parallel to the radial direction of the socket formed by the protrusion of the socket from the pipe body.

[0006] As a further improvement of the above technical scheme:

[0007] The outer diameter of the socket is equal to or greater than the outer diameter of the pipe body. When the outer diameter of the socket is greater than the outer diameter of the pipe body, the flange end surface contacts the step surface parallel to the radial direction of the socket formed by the protrusion of the socket from the pipe body.

[0008] The connecting pieces are inserted into the sockets from the end surface of the sockets after passing through the flanges, and the connecting pieces are arranged on the same circle in intervals.

[0009] The self-anchoring connector further comprises reinforcing ribs, the reinforcing ribs are located on the side of the flange away from the socket, the reinforcing ribs connect the flange and the pipe body, the reinforcing ribs are arranged in intervals along the circumference of the pipe body.

[0010] The socket is provided with fastening holes for the insertion of the connecting pieces, the fastening holes are blind holes or through holes, when the fastening holes are blind holes, the fastening holes are formed in the end surface of the socket, when the fastening holes are through holes, the socket is provided with a section with an outer diameter larger than that of other sections, and the connecting pieces are locked by nuts after passing through the flanges and the fastening holes.

[0011] The connecting pieces are bolts, the bolts comprise bolt heads and shanks which are connected integrally, the shanks can pass through the flanges, the bolt heads cannot pass through the flanges, the flanges are clamped between the bolt heads of the connecting pieces and the end surface of the socket, when the fastening holes are blind holes, the fastening holes are provided with internal threads, and the connecting pieces and the fastening holes are screwed and locked.

[0012] The outer diameter of the flange is equal to the maximum outer diameter of the socket.

[0013] The self-anchoring connector further comprises a first sealing ring, the first sealing ring is compressed between the socket and the socket.

[0014] The self-anchoring connector further comprises a second sealing ring, the socket is provided with a second sealing groove for the installation of the second sealing ring, the second sealing ring contacts the flange, the socket and the socket, and the end surface of the socket contacts the flange.

[0015] The self-anchoring connector further comprises a third sealing ring, the third sealing ring is located between the flange and the end surface of the socket.

[0016] The self-anchoring connector has the advantages that: adjacent two pipes are fixed and connected together through the self-anchoring connector, the adjacent two pipes will not move and deflect relative to each other, the self-anchoring connector is suitable for overhead pipes and comprehensive pipe corridors and the like, the flange and the end surface of the socket contact and transmit force, the contact area of the flange and the end surface of the socket is large, the force is uniformly distributed, the flange is welded on the pipe body, the overall strength and reliability are high, the reinforcing ribs are arranged, the reinforcing ribs connect the pipe body and the flange, the overall strength of the flange and the self-anchoring connector is larger, the self-anchoring connector needs simple components and is easy to install, the overall cost is low, the strength of the connector is high, the requirements for installation equipment and personnel technical level are low, the self-anchoring connector is suitable for installation on construction sites, double sealing can be arranged, the sealing effect of the pipe is improved without affecting other components of the self-anchoring connector, the outer diameter of the socket can be greater than or equal to that of the pipe body, when the outer diameter of the socket is greater than that of the pipe body, the strength of the self-anchoring connector is larger, and the self-anchoring connector is more suitable for large-diameter pipes. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1It is the pipe structure schematic diagram of the embodiment one of the utility model.

[0018] Figure 2 It is the schematic diagram of the self anchoring interface of the embodiment one of the utility model.

[0019] Figure 3 It is Figure 2 A-A section schematic diagram.

[0020] Figure 4 It is the pipe structure schematic diagram of the embodiment two of the utility model.

[0021] Figure 5 It is the schematic diagram of the self anchoring interface of the embodiment two of the utility model.

[0022] Figure 6 It is the schematic diagram of the self anchoring interface of the embodiment three of the utility model.

[0023] Figure 7 It is the pipe structure schematic diagram of the embodiment four of the utility model.

[0024] Figure 8 It is the schematic diagram of the self anchoring interface of the embodiment four of the utility model.

[0025] Figure 9 It is the pipe structure schematic diagram of the embodiment five of the utility model.

[0026] Figure 10 It is the schematic diagram of the self anchoring interface of the embodiment five of the utility model.

[0027] Figure 11 It is the schematic diagram of the self anchoring interface of the embodiment six of the utility model.

[0028] Figure 12 It is the pipe structure schematic diagram of the embodiment seven of the utility model.

[0029] Figure 13 It is the schematic diagram of the self anchoring interface of the embodiment seven of the utility model.

[0030] Figure 14 It is the pipe structure schematic diagram of the embodiment eight of the utility model.

[0031] Figure 15 It is the schematic diagram of the self anchoring interface of the embodiment eight of the utility model.

[0032] Figure 16 It is the schematic diagram of the self anchoring interface of the embodiment nine of the utility model.

[0033] Figure 17 It is the pipe structure schematic diagram of the embodiment ten of the utility model.

[0034] Figure 18It is a schematic diagram of the self-anchoring interface of the tenth embodiment of the present utility model.

[0035] Figure 19 This is a schematic diagram of the pipe structure of Example 11 of the present utility model.

[0036] Figure 20 This is a schematic diagram of the self-anchoring interface of the eleventh embodiment of the present utility model.

[0037] Figure 21 It is a schematic diagram of the self-anchoring interface of the twelfth embodiment of the present utility model.

[0038] Figure markings: 1. socket, 101. socket reinforcement ring, 2. socket, 21. first sealing groove, 22. fastening hole, 23. second sealing groove, 24. blocking part, 3. pipe body, 4. flange, 5. reinforcing rib, 6. connecting part, 7. first sealing ring, 8. second sealing ring, 9. third sealing ring, 10. nut. DETAILED DESCRIPTION

[0039] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0040] For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "upper" may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in a drawing is inverted, a device described as "above" or "on top of" another device or structure would then be positioned as "below" or "below" the other device or structure. Thus, the exemplary term "above" can include both the "above" and "below" orientations. The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0041] Example 1:

[0042] A self-anchoring interface for preventing pipes from falling off and deflecting, such as Figure 1 As shown, the pipe comprises a socket 1, a pipe body 3 and a socket 2 which are coaxially connected in sequence, and the socket 1 and the pipe body 3 are both cylindrical structures.

[0043] In this embodiment, the inner diameter and outer diameter of the socket 1 are respectively equal to the inner diameter and outer diameter of the pipe body 3 , and the outer diameter of the socket 2 is larger than the outer diameter of the pipe body 3 .

[0044] The flange 4 is arranged on the outer surface of the pipe body 3, and the reinforcing rib 5 is arranged on the outer surface of the pipe body 3.

[0045] In the embodiment, the flange 4 is annular and made of metal.

[0046] In the embodiment, the flange 4 and the reinforcing rib 5 are welded to the pipe body 3.

[0047] The first sealing groove 21 is arranged in the middle of the inner wall of the socket 2, and is a groove arranged on the inner wall of the socket 2.

[0048] The pipe material can be a socket pipe material, a straight pipe or other special-shaped pipe material.

[0049] In the embodiment, the pipe material is a socket pipe material.

[0050] When two adjacent pipe materials are connected, the spigot 1 of one pipe material is inserted into the socket 2 of the other pipe material, and the self-anchored joint is formed by cooperation of other auxiliary parts.

[0051] The self-anchored joint comprises a spigot 1, a socket 2, a pipe body 3, a flange 4, a reinforcing rib 5, a connecting part 6 and a first sealing ring 7. Figure 2 3 The spigot 1 is inserted into the socket 2, and the spigot 1 and the socket 2 of the self-anchored joint are the spigot 1 and the socket 2 of two adjacent pipe materials, respectively.

[0052] The outer diameter of the spigot 1 of the self-anchored joint is smaller than the inner diameter of the socket 2.

[0053] The flange 4 does not extend into the socket 2, and the flange 4 is fixedly connected to the end face of the socket 2. Specifically, the flange 4 is fixed to the socket 2 through the connecting part 6, and the connecting part 6 is inserted into the socket 2 from the end face of the socket 2 after penetrating through the flange 4.

[0054] The outer diameter of the flange 4 is equal to the maximum outer diameter of the socket 2, and the maximum outer diameter of the socket 2 is the outer diameter of the end face of the socket 2. That is, the outer walls of the flange 4 and the end face of the socket 2 are flush.

[0055] ​There are multiple connectors 6, which are spaced apart and arranged on the same circular ring. Correspondingly, the socket 2 is provided with a blind fastening hole 22 for inserting the connector 6, and the fastening hole 22 is formed by being concave from the end surface of the socket 2.

[0056] In this embodiment, the connectors 6 and the reinforcement ribs 5 are alternately arranged along the circumference of the tube body 3 , that is, each connector 6 is located between two adjacent reinforcement ribs 5 , and each reinforcement rib 5 is located between two adjacent connectors 6 .

[0057] In this embodiment, connector 6 is a bolt comprising an integrally connected bolt head and shank. The shank passes through flange 4, but the bolt head cannot. Specifically, flange 4 is provided with a through-hole through which the shank of connector 6 can pass, but the bolt head cannot. Fastening hole 22 is internally threaded, and connector 6 and fastening hole 22 are screwed together and locked, clamping flange 4 between the bolt head of connector 6 and the end face of socket 2.

[0058] The first sealing groove 21 is used to install the first sealing ring 7 to achieve sealing after the two adjacent pipes are connected. The first sealing ring 7 is compressed between the socket 1 and the socket 2.

[0059] Based on the above structure, the working principle and method of connecting adjacent pipes are as follows:

[0060] The first step is to Figure 2 Install the first sealing ring 7 in the first sealing groove 21 of the pipe where the middle socket 2 is located. Figure 2 Insert the socket 1 of the pipe (where the middle socket 1 is located) into the socket 2 until the 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 flange 4 with the fastening holes 22 on the end face of the socket 2. Insert the connector 6 through the flange 4 and into the fastening holes 22. This connects the first and second pipes to form a self-anchoring joint.

[0061] The socket 1 and the socket 2 of the self-anchoring interface formed after connection cannot move or deflect relative to each other.

[0062] Example 2:

[0063] Different from the first embodiment, in this embodiment, a second sealing groove 23 is further provided on the inner wall of the socket 2. Figure 4 、 5 The second sealing groove 23 is used to install the second sealing ring 8, which contacts the flange 4, the socket 2 and the plug 1 to prevent external sewage or other impurities from penetrating into the pipe through the contact surface of the flange 4 and the socket 2.

[0064] Specifically, the inner wall of the socket 2 is provided with a second sealing groove 23, a blocking part 24 and a first sealing groove 21 in sequence from the end face to the direction away from the end face of the socket 2. The second sealing groove 23 and the first sealing groove 21 are both grooves provided on the inner wall of the socket 2, and the blocking part 24 is a part without concave.

[0065] The second sealing ring 8 is compressed between the outer wall of the spigot 1 and the inner wall of the socket 2 at the second sealing groove 23. The second sealing ring 8 contacts the flange 4 without affecting the contact between the flange 4 and the end face of the socket 2.

[0066] In this embodiment, a double sealing setting corresponding to the first sealing ring 7 and the second sealing ring 8 is provided, further improving the sealing effect of the two pipe materials.

[0067] Embodiment three:

[0068] Different from the first embodiment, in this embodiment, the third sealing ring 9 is provided between the flange 4 and the end face of the socket 2, as shown in Figure 6 . That is, the flange 4 and the end face of the socket 2 are not in direct contact, but the third sealing ring 9 is sandwiched therebetween.

[0069] In this embodiment, a double sealing setting corresponding to the first sealing ring 7 and the third sealing ring 9 is provided, further improving the sealing effect of the two pipe materials.

[0070] Embodiment four:

[0071] In this embodiment, different from the first embodiment, the spigot 1 and the flange 4 in this embodiment are different. Specifically, the outer diameter of the spigot 1 is greater than the outer diameter of the pipe body 3 and less than the inner diameter of the socket 2, as shown in Figure 7 , 8 The spigot 1 protrudes from the outer surface of the pipe body 3 to form a stepped structure. The end face of the spigot 1 away from the pipe body 3 is the end face of the spigot 1, and the end face or the side face of the spigot 1 connected to the pipe body 3 is a stepped face, that is, the stepped face is formed by the spigot 1 protruding from the surface of the pipe body 3, and the plane where the stepped face is located is parallel to the radial direction of the spigot 1.

[0072] A socket reinforcement ring 101 is sleeved inside the socket 1 to enhance the strength of the socket 1. The socket reinforcement ring 101 can be set as an integral part of the socket 1, which is equivalent to the socket 1 and the socket reinforcement ring 101 being two metal layers of the same or different materials. The socket reinforcement ring 101 can also be set separately. When the socket reinforcement ring 101 is set separately, the socket reinforcement ring 101 is annular and is generally made of stainless steel with certain ductility and rigidity. The initial outer diameter of the socket reinforcement ring 101 is smaller than the inner diameter of the socket 1. When installing the socket reinforcement ring 101, the socket reinforcement ring 101 is placed in the socket 1, and then the socket reinforcement ring 101 is expanded using a diameter expansion device to expand the diameter of the socket reinforcement ring 101 until the socket reinforcement ring 101 is tightly pressed against the inner wall of the socket 1. The reason why the socket reinforcement ring 101 can be tightly pressed against the inner wall of the socket 1 is that during the diameter expansion, the inner wall of the socket 1 will be subjected to radial pressure from the diameter expansion device. After the pressure is removed (the expansion is completed), the socket 1 and the socket reinforcement ring 101 will produce a certain elastic recovery. Since the wall thickness of the socket 1 is large and it is connected to the pipe body, the elastic recovery generated is greater than that of the socket reinforcement ring 101. After the recovery, the socket reinforcement ring 101 is pressed tightly against the inner wall of the socket.

[0073] In this embodiment, the flange 4 is coaxially fixedly sleeved on the outer surface of the tube body 3 and contacts the stepped surface of the socket 1 protruding from the tube body 3 .

[0074] Based on the above structure, when the socket 2 applies tension to the flange 4 through the connector 6, the flange 4 can transmit the thrust to the pipe body 3 and the socket 1 in contact with it, thereby greatly improving the strength of the flange 4 and the entire self-anchoring interface, and is more suitable for large-diameter pipes.

[0075] Embodiment 5:

[0076] Different from the fourth embodiment, in this embodiment, a second sealing groove 23 is further provided on the inner wall of the socket 2. Figure 9 、 10 The second sealing groove 23 is used to install the second sealing ring 8, which contacts the flange 4, the socket 2 and the plug 1 to prevent external sewage or other impurities from penetrating into the pipe through the contact surface of the flange 4 and the socket 2.

[0077] The second sealing groove 23 and the second sealing ring 8 are the same as those in the second embodiment, and are not described again here.

[0078] Example 6:

[0079] Different from the fourth embodiment, in this embodiment, a third sealing ring 9 is provided between the flange 4 and the end face of the socket 2. Figure 11 That is, the flange 4 and the end face of the socket 2 are not in direct contact, but are sandwiched by a third sealing ring 9.

[0080] Embodiment seven:

[0081] Different from embodiment one, the fastening hole 22 in this embodiment is a through hole instead of a blind hole, as shown in Figure 12 and 13 . Correspondingly, the socket 2 is provided with a fastening section with the fastening hole 22 and a main section, and the outer diameter of the fastening section is greater than that of the main section. The fastening hole 22 is arranged on the section of the fastening section with a diameter exceeding the outer diameter of the main section.

[0082] The connecting piece 6 is locked by the nut 10 after passing through the flange 4 and the fastening hole 22.

[0083] Embodiment eight:

[0084] Different from embodiment seven, in this embodiment, the inner wall of the socket 2 is further provided with a second sealing groove 23, as shown in Figure 14 , 15 . The second sealing groove 23 is used for installing the second sealing ring 8, and the second sealing ring 8 contacts the flange 4, the socket 2 and the spigot 1 to prevent external sewage or other impurities from penetrating into the pipe material through the contact surface of the flange 4 and the socket 2.

[0085] The second sealing groove 23 and the second sealing ring 8 are the same as those in embodiment two, and will not be described here again.

[0086] Embodiment nine:

[0087] Different from embodiment seven, in this embodiment, the flange 4 and the socket 2 end face are provided with a third sealing ring 9, as shown in Figure 16 . That is, the flange 4 and the socket 2 end face are not in direct contact, but are sandwiched with the third sealing ring 9.

[0088] Embodiment ten:

[0089] In this embodiment, different from embodiment seven, the spigot 1 and the flange 4 in this embodiment. Specifically, the outer diameter of the spigot 1 is greater than the outer diameter of the pipe body 3 and less than the inner diameter of the socket 2. As shown in Figure 17 , 18 , the spigot 1 protrudes from the outer surface of the pipe body 3 to form a stepped structure, that is, the stepped surface is formed by the spigot 1 protruding from the surface of the pipe body 3, and the plane where the stepped surface is located is parallel to the radial direction of the spigot 1.

[0090] The spigot 1 is sleeved with a spigot reinforcing ring 101 for enhancing the strength of the spigot 1.

[0091] In this embodiment, the flange 4 is coaxially fixedly sleeved on the outer surface of the pipe body 3 and contacts the stepped surface of the spigot 1 protruding from the pipe body 3.

[0092] Embodiment eleven:

[0093] Different from embodiment ten, in this embodiment, the inner wall of the socket 2 is further provided with a second sealing groove 23, as shown in Figure 19 ,20 The second sealing groove 23 is used for installing the second sealing ring 8, which contacts the flange 4, the socket 2 and the spigot 1, preventing the outside sewage or other impurities from penetrating into the pipe material through the contact surface of the flange 4 and the socket 2.

[0094] The second sealing groove 23 and the second sealing ring 8 are the same as those in the second embodiment, which will not be described here again.

[0095] Embodiment Twelve:

[0096] Different from the tenth embodiment, in this embodiment, the third sealing ring 9 is arranged between the flange 4 and the end surface of the socket 2, as shown in the figure. Figure 21 That is, the flange 4 and the end surface of the socket 2 are not directly contacted, but the third sealing ring 9 is sandwiched therebetween.

[0097] Finally, it is necessary to point out that: the above embodiments are only used for further detailed description of the technical scheme of the utility model, and cannot be understood as the limitation of the protection scope of the utility model, and some non-essential improvements and adjustments made by the skilled in the art according to the above content of the utility model belong to the protection scope of the utility model.

Claims

1. A self-anchoring connector for preventing the pipe from being pulled out and deviated, characterized in that, The self-anchoring joint comprises a spigot (1), a pipe body (3), a socket (2), a flange (4) and a connecting piece (6), the spigot (1) is coaxially fixedly connected to one end of the pipe body (3), the flange (4) is fixed to the outer surface of the pipe body (3), the spigot (1) is inserted into the socket (2), the flange (4) and the socket (2) are fixedly connected together through the connecting piece (6), the outer diameter of the spigot (1) is equal to or greater than the outer diameter of the pipe body (3), when the outer diameter of the spigot (1) is greater than the outer diameter of the pipe body (3), the end surface of the flange (4) contacts the stepped surface parallel to the radial direction of the spigot (1) formed by the spigot (1) protruding from the pipe body (3).

2. The self-anchoring interface of claim 1, wherein: The connecting piece (6) is inserted into the socket (2) from the end surface of the socket (2) after penetrating through the flange (4), and a plurality of connecting pieces (6) are arranged on the same circular ring at intervals.

3. The self-anchoring interface of claim 2, wherein: The self-anchoring joint further comprises a reinforcing rib (5) located on the side of the flange (4) away from the spigot (1), the reinforcing rib (5) connects the flange (4) and the pipe body (3), and a plurality of reinforcing ribs (5) are arranged on the same circular ring at intervals.

4. The self-anchoring interface of claim 1, wherein: The socket (2) is provided with a fastening hole (22) for inserting the connecting piece (6), the fastening hole (22) is a blind hole or a through hole, when the fastening hole (22) is a blind hole, the fastening hole (22) is formed in the end surface of the socket (2) and is recessed inward, when the fastening hole (22) is a through hole, the outer diameter of the socket (2) at the section provided with the fastening hole (22) is greater than the outer diameter of other parts, and the connecting piece (6) is locked by a nut (10) after penetrating through the flange (4) and the fastening hole (22).

5. The self-anchoring interface of claim 4, wherein: The connecting piece (6) is a bolt comprising a bolt head and a screw rod integrally connected, the screw rod can penetrate through the flange (4), the bolt head cannot penetrate through the flange (4), the flange (4) is clamped between the bolt head of the connecting piece (6) and the end surface of the socket (2), when the fastening hole (22) is a blind hole, the fastening hole (22) is provided with an internal thread, and the connecting piece (6) and the fastening hole (22) are screwed and locked.

6. The self-anchoring interface of any of claims 1-5, wherein: The outer diameter of the flange (4) is equal to the maximum outer diameter of the socket (2).

7. The self-anchoring interface of any of claims 1-5, wherein: The self-anchoring joint further comprises a first sealing ring (7) compressed between the spigot (1) and the socket (2).

8. The self-anchoring interface of claim 7, wherein: The self-anchoring joint further comprises a second sealing ring (8), the socket (2) is provided with a second sealing groove (23) for installing the second sealing ring (8) on the inner wall, the second sealing ring (8) contacts the flange (4), the socket (2) and the spigot (1), and the end surface of the socket (2) contacts the flange (4).

9. The self-anchoring interface of claim 7, wherein: The self-anchoring joint further comprises a third sealing ring (9) located between the end surface of the flange (4) and the socket (2).

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