CN214789548U

CN214789548U - Butt joint pipeline

Info

Publication number: CN214789548U
Application number: CN202120905362.0U
Authority: CN
Inventors: 王立全
Original assignee: Sinopec Lubricating Oil Beijing Co ltd
Current assignee: Sinopec Lubricating Oil Beijing Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-19
Anticipated expiration: 2031-04-28

Abstract

The utility model relates to a butt joint pipeline belongs to pipeline butt joint technical field, and butt joint department to adjacent pipeline forms the weld beading problem easily in the pipeline is inside provides following technical scheme, the technical essential of this application include first pipeline, with the second pipeline and the pipe box of first pipeline butt joint, the outside of first official's way and second pipeline butt joint department is located to the pipe box cover, pipe box and first pipeline, pipe box and second pipeline fixed connection. This application has and makes the difficult inside that forms at first pipeline and second pipeline butt joint of beading for the difficult card of advantage at first pipeline and second pipeline butt joint of line ball is swept.

Description

Butt joint pipeline

Technical Field

The application relates to the technical field of pipeline butt joint, in particular to a butt joint pipeline.

Background

At present, oil pipelines are transported by transferring a section of pipeline produced in a factory to a construction site, butting the section of pipeline with a section of pipeline on the construction site, and fixedly connecting the section of pipeline with a section of pipeline by adopting argon arc welding or electric welding at the butt joint position of adjacent pipelines to form an oil pipeline.

After the oil pipeline transports oil for a long time, the oil is easy to adhere to the inner wall of the oil pipeline, so that the oil pipeline is blocked, and therefore the oil pipeline needs to be swept. Because the butt joint of adjacent pipeline adopts argon arc welding or electric welding mode butt joint together, electric arc welding or electric welding puncture the butt joint seam of adjacent pipeline easily and form the beading inside the pipeline, when carrying out the pipeline and lead to the ball and sweep the line operation, the existence of beading hinders the line ball in the inside line sweeping operation of oil pipeline easily, sweeps the line ball and blocks the butt joint department at the pipeline easily, is unfavorable for oil pipeline and leads to the ball and sweep the line operation.

SUMMERY OF THE UTILITY MODEL

In order to make the difficult inside that forms at first pipeline and second pipeline butt joint of flash for the difficult card of sweeping the line ball is in first pipeline and second pipeline butt joint department, this application provides a butt joint pipeline, adopts following technical means:

a butt joint pipeline comprises a first pipeline, a second pipeline and a pipe sleeve, wherein the second pipeline is in butt joint with the first pipeline, the pipe sleeve is sleeved outside the butt joint position of the first pipeline and the second pipeline, and the pipe sleeve is fixedly connected with the first pipeline, the pipe sleeve and the second pipeline.

By adopting the technical scheme, the pipe sleeve is sleeved outside the first pipeline or the second pipeline, so that the pipe sleeve does not interfere with the butt joint of the first pipeline and the second pipeline, then the first pipeline and the second pipeline are aligned, the first pipeline and the second pipeline are butted together, then the pipe sleeve is moved to the butt joint of the first pipeline and the second pipeline, so that the pipe sleeve can cover the butt joint of the first pipeline and the second pipeline, then the pipe sleeve is fixedly connected with the first pipeline and the second pipeline, the positions of the first pipeline and the second pipeline are fixed under the action of the pipe sleeve, and the butt joint state of the first pipeline and the second pipeline is kept; because the pipe sleeve respectively with first pipeline, second pipeline fixed connection, need not to weld at the butt joint department of first pipeline and second pipeline for the difficult inside that forms at first pipeline and second pipeline butt joint department of weld beading, the butt joint department of being convenient for sweep the line ball through first pipeline and second pipeline smoothly makes and sweeps the line ball and is difficult for blocking in first pipeline and second pipeline butt joint department.

Optionally, a plurality of welding spots are fixedly arranged at the butt joint of the first pipeline and the second pipeline, and the plurality of welding spots are uniformly distributed along the circumferential direction of the first pipeline.

Through adopting above-mentioned technical scheme, through setting up a plurality of solder joints, be in the same place first pipeline and second pipeline fixed connection, can realize the preliminary fixed to first pipeline and second pipeline, be convenient for remove the pipe box to the butt joint department of first pipeline and second pipeline.

Optionally, the outer end face of the welding spot is an arc face, and the radian of the arc face is equal to that of the inner wall of the pipe sleeve.

By adopting the technical scheme, the joint degree between the welding points and the pipe sleeves is improved, the gaps between the welding points and the pipe sleeves can be reduced, and the fixed connection between the pipe sleeves and the first pipeline and the second pipeline is further improved.

Optionally, the butt joint end of the first pipeline is provided with a first slope surface, the butt joint end of the second pipeline is provided with a second slope surface, the inclination directions of the first slope surface and the second slope surface are opposite, and the welding spot is arranged at the butt joint position of the first slope surface and the second slope surface.

Through adopting above-mentioned technical scheme, through setting up first domatic and the second is domatic, when first pipeline and second pipeline butt joint are together, set up the solder joint in the first domatic butt joint department with the domatic butt joint of second for the solder joint is difficult for through the butt joint department welding transition of first pipeline and second pipeline, is difficult for forming the flash in first pipeline and second pipeline butt joint department inner wall, further reduces the formation of flash.

Optionally, the inner diameter of the first slope surface butt joint end is greater than or equal to the inner diameter of the first pipeline, and the inner diameter of the second slope surface butt joint end is greater than or equal to the inner diameter of the second pipeline.

Through adopting above-mentioned technical scheme, can guarantee the structural thickness of first pipeline and second pipeline butt joint end, avoid first pipeline and second pipeline butt joint end wall thickness too thin, cause the inside beading that forms of first pipeline and second pipeline butt joint department when the solder joint sets up the transition.

Optionally, the outer end face of the welding spot is flush with the outer end face of the first pipeline.

By adopting the technical scheme, on one hand, the flatness of the butt joint of the first pipeline and the second pipeline can be ensured; on the other hand, the distance between the inner wall of the pipe sleeve and the outer walls of the first pipeline and the second pipeline can be reduced, and the fitting degree of the pipe sleeve and the first pipeline and the second pipeline is improved.

Optionally, the connecting end of the pipe sleeve and the first pipeline and the connecting end of the pipe sleeve and the second pipeline are continuously welded.

By adopting the technical scheme, two ends of the pipe sleeve are fixedly connected with the first pipeline and the second pipeline respectively in a continuous welding mode, on one hand, the fixed connection between the pipe sleeve and the first pipeline and the second pipeline can be realized, and the butt joint state of the first pipeline and the second pipeline can be maintained; on the other hand, the sealing state of the pipe sleeve to the butt joint of the first pipeline and the second pipeline can be kept, and the spot welding position is sealed, so that oil inside the oil pipeline is not easy to overflow through the butt joint of the first pipeline and the second pipeline.

Optionally, the pipe sleeve includes two half pipes arranged oppositely, and the two half pipes are connected end to enclose an annular cavity matched with the outer wall of the first pipeline.

By adopting the technical scheme, when the pipeline joint is installed, the first pipeline and the second pipeline are butted together, then one of the half pipes is buckled above the butt joint of the first pipeline and the second pipeline, and the two ends of the half pipe are respectively fixedly connected with the first pipeline and the second pipeline, so that the primary fixing of the positions of the first pipeline and the second pipeline is realized; then buckle another half pipe and locate the below of first pipeline and second pipeline butt joint department, fix two pipelines together from the both sides of first pipeline and second pipeline respectively through two half pipes, fix the butt joint department of two half pipes again, realize the butt joint of first pipeline and second pipeline fixedly.

Optionally, a clamping groove is formed in the inner wall of the half pipe, a first inclined plane and a second inclined plane are arranged on the inner wall of the clamping groove, the first inclined plane and the first slope surface are attached to each other, and the second inclined plane and the second slope surface are attached to each other.

Through adopting above-mentioned technical scheme, through setting up the joint groove, can realize stepping down first domatic and the domatic of second, will half a pipe lock during the installation and locate the outside of first pipeline and second pipeline butt joint department for first inclined plane and first domatic laminating each other, the second inclined plane and the domatic laminating each other of second can ensure that the middle part of half a pipe aligns with the butt joint department of first pipeline and second pipeline.

Optionally, the length of the first slope surface is smaller than that of the first slope surface; the length of the second slope surface is smaller than that of the second slope surface.

Through adopting above-mentioned technical scheme, first domatic and the domatic length of second is longer, can ensure that half pipe has stable application of force area, and when half pipe cover was located first pipeline and second pipeline butt joint department, half pipe can be followed first domatic or the domatic first pipeline that is close to of second or keep away from, and the butt joint department of the tight first pipeline of half pipe clamp of being convenient for and second pipeline.

In summary, the present application has the following beneficial effects:

firstly, a pipe sleeve is arranged at the butt joint of a first pipeline and a second pipeline, so that the positions of the first pipeline and the second pipeline are fixed, and the butt joint state of the first pipeline and the second pipeline is kept; the pipe sleeve is fixedly connected with the first pipeline and the second pipeline respectively, so that welding beading is not required to be welded at the butt joint of the first pipeline and the second pipeline, a line sweeping ball can pass through the butt joint of the first pipeline and the second pipeline smoothly, and the line sweeping ball is not clamped at the butt joint of the pipelines easily;

second, set up a plurality of solder joints through the butt joint department at first pipeline and second pipeline, can realize the preliminary fixed to first pipeline and second pipeline, through mutually supporting of solder joint and pipe box, can improve the joint strength of the butt joint department of first pipeline and second pipeline, be convenient for keep the alignment of first pipeline and second pipeline.

Drawings

FIG. 1 is a top view of a docking conduit according to example 1 of the present application;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 2;

FIG. 4 is a top view of the docking conduit of example 2 of the present application;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 4;

FIG. 6 is a top view of the docking conduit of example 3 of the present application;

FIG. 7 is a cross-sectional view taken along line D-D of FIG. 6;

fig. 8 is an enlarged view of a portion E in fig. 7.

In the figure, 1, a first pipeline; 11. a first slope surface; 12. a first straight face; 2. a second conduit; 21. a straight tube portion; 211. a second slope surface; 212. a second straight face; 22. a bent pipe portion; 3. pipe sleeve; 31. a half pipe; 32. a clamping groove; 321. a first inclined plane; 322. a second inclined plane; 4. a V-shaped groove; 5. welding spots; 51. a cambered surface; 6. and (4) welding flash.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The application discloses a butt joint pipeline.

Example 1

A butt joint pipe, referring to fig. 1, includes a first pipe 1, a second pipe 2 butt-jointed with the first pipe 1, and a pipe sleeve 3.

With reference to fig. 1 and 2, the first pipeline 1 is a straight pipe with two open ends, the second pipeline 2 is a straight pipe with the same size as the first pipeline 1, when the first pipeline 1 and the second pipeline 2 are aligned, the axis of the first pipeline 1 coincides with the axis of the second pipeline 2, and the open end of the first pipeline 1 and the open end of the second pipeline 2 are attached to each other.

Referring to fig. 2 and 3, the butt end of the first pipeline 1 is provided with a first slope surface 11, the first slope surface 11 is inclined from outside to inside to one side close to the axis of the first pipeline 1, and the slope of the first slope surface 11 is preferably 45 °. The lower end of the first slope 11 is arranged at one side close to the second pipeline 2, and the inner diameter of the lower end of the first slope 11 is larger than that of the first pipeline 1, so that the structural thickness of the butt joint of the first pipeline 1 is increased; the higher end of the first slope surface 11 is flush with the outer side surface of the first pipeline 1.

Referring to fig. 2 and 3, the butt end of the second pipeline 2 is provided with a second slope surface 211, the inclination direction of the second slope surface 211 is opposite to that of the first slope surface 11, the second slope surface 211 is inclined from outside to inside to one side close to the axis of the second pipeline 2, and the slope of the second slope surface 211 is preferably 45 °. The lower end of the second surface is arranged at one side close to the first pipeline 1, the inner diameter of the lower end of the second slope surface 211 is larger than that of the second pipeline 2, and the structural thickness of the butt joint of the second pipeline 2 is increased; the higher end of the second slope surface 211 is flush with the outer side surface of the second pipeline 2.

Referring to fig. 2 and 3, when the first pipe 1 and the second pipe 2 are butted together, the lower end of the first slope 11 and the lower end of the second slope 211 enclose a V-shaped groove 4, and the open end of the V-shaped groove 4 faces outwards. V type groove 4's inside is provided with a plurality of solder joints 5, solder joint 5 penetration breakdown V type groove 4, a plurality of solder joints 5 are circumference array distribution along V type groove 4 circumferential direction, partial solder joint 5 and the first domatic 11 contact, the domatic 211 contact of part and second, this application does not do the injecing to solder joint 5's quantity, this embodiment uses four solder joints 5 as an example, not only can realize the initial joint to first pipeline 1 and second pipeline 2, and solder joint 5 is difficult for puncturing the butt joint of adjacent pipeline, thereby be difficult for forming weld beading 6 in first pipeline 1 and the inside butt joint of second pipeline 2.

Combine fig. 2 and 3, the outer terminal surface of solder joint 5 sets up to cambered surface 51, and the radian of cambered surface 51 equals the radian of first pipeline 1 outer wall, and the outer terminal surface of solder joint 5 and the outer terminal surface parallel and level of first pipeline 1 not only can realize the packing to V type groove 4, can keep the holistic roughness of butt joint back butt joint pipeline moreover.

Referring to fig. 2 and 3, the pipe sleeve 3 is a circular pipe with openings at two ends, the inner diameter of the pipe sleeve 3 is equal to the outer diameter of the first pipeline 1, before the first pipeline 1 and the second pipeline 2 are aligned, the pipe sleeve 3 is firstly sleeved outside the first pipeline 1, and the friction force between the pipe sleeve 3 and the first pipeline 1 is greater than the gravity of the pipe sleeve 3, so that the pipe sleeve 3 is not easy to move along the axis direction of the first pipeline 1 under the action of non-external force. When the first pipeline 1 and the second pipeline 2 are aligned, the pipe sleeve 3 is driven by an external tool to move towards one side close to the second pipeline 2, so that the pipe sleeve 3 is sleeved outside the joint of the first pipeline 1 and the second pipeline 2, at the moment, the inner wall of the pipe sleeve 3 is contacted with the cambered surface 51 of the welding point 5, and part of the pipe sleeve 3 is overlapped with the first pipeline 1 and part of the pipe sleeve is overlapped with the second pipeline 2.

Referring to fig. 2 and 3, the connection end of the pipe sleeve 3 and the first pipeline 1 and the connection end of the pipe sleeve 3 and the second pipeline 2 are continuously welded to realize the fixed connection between the pipe sleeve 3 and the first pipeline 1 and between the pipe sleeve 3 and the second pipeline 2, and at this time, a weld beading 6 is formed at the connection positions of the pipe sleeve 3 and the first pipeline 1 and between the pipe sleeve 3 and the second pipeline 2. The pipe sleeve 3 can fix the positions of the first pipeline 1 and the second pipeline 2 and keep the first pipeline 1 and the second pipeline 2 aligned.

The implementation principle of the embodiment is as follows: firstly, the pipe sleeve 3 is sleeved outside the first pipeline 1, and the friction force between the pipe sleeve 3 and the first pipeline 1 is larger than the gravity of the pipe sleeve 3, so that the pipe sleeve 3 is not easy to move along the axis direction of the first pipeline 1 under the action of non-external force; then aim at first pipeline 1 and second pipeline 2, first domatic 11 encloses into the V type groove 4 that vertical cross-section is the V type with the domatic 211 of second this moment, set up four solder joints 5 along the circumferential direction of V type groove 4, the mode of the spot welding that adopts in solder joint 5 department is in the same place first pipeline 1 with second pipeline 2 preliminary connection, then order about pipe box 3 through external instrument and move to the butt joint department of first pipeline 1 and second pipeline 2, the both ends of pipe box 3 adopt continuous welding's mode welding together with first pipeline 1 and second pipeline 2 respectively, realize the butt joint to first pipeline 1 and second pipeline 2. The welding spots 5 and the pipe sleeves 3 are matched with each other, so that the connection strength of the butt joint of the first pipeline 1 and the second pipeline 2 can be improved, and the alignment of the first pipeline 1 and the second pipeline 2 is convenient to maintain; connect first pipeline 1 and second pipeline 2 together through the mode of spot welding, the spot welding is difficult for puncturing first pipeline 1 and second pipeline 2's butt joint seam, link together pipe box 3 and first pipeline 1 and second pipeline 2 through continuous welding, realize the fixed connection between first pipeline 1 and the second pipeline 2, need not to adopt electric arc welding or the mode of electric welding at the butt joint department of first pipeline 1 and second pipeline 2 and connect, make the beading 6 difficult formation in the inside of first pipeline 1 and second pipeline 2, be convenient for sweep the butt joint department that the line ball passes through first pipeline 1 and second pipeline 2 smoothly, make the difficult card of line ball at pipeline butt joint department.

Example 2

The difference between this embodiment and embodiment 1 is that, in conjunction with fig. 4 and 5, the second pipeline 2 includes a straight pipe portion 21 and an elbow portion 22, the straight pipe portion 21 and the elbow portion 22 are integrally formed, the straight pipe portion 21 is disposed on a side close to the first pipeline 1, and the straight pipe portion 21 can be aligned with the first pipeline 1 and can accommodate the butt joint between the adjacent pipelines at the bend.

The implementation principle of the embodiment is as follows: because the second pipeline 2 is provided with the bent pipe part 22, the butt joint between adjacent pipelines at the bent part of the oil pipeline can be realized, and the application range of the butt joint pipeline is enlarged.

Example 3

The difference between this embodiment and embodiment 1 is that, in connection with fig. 6, 7 and 8, the butt end of the first pipe 1 has a first ramp 11 extending in its radial direction, the slope of the first ramp 11 preferably being 45 °. First domatic 11 higher one end sets up in the one side that is close to second pipeline 2, the lower one end of first domatic 11 and the lateral surface parallel and level of first pipeline 1, and first domatic 11 sets up to first straight face 12 towards one side of second pipeline 2, can strengthen the structural thickness of first pipeline 1 butt joint department.

With reference to fig. 7 and 8, the butt end of the second pipe 2 is extended in its radial direction with a second slope surface 211, the slope of the second slope surface 211 preferably being 45 °. The higher one end of the domatic 211 of second sets up in the one side that is close to first pipeline 1, the lower one end of the domatic 211 of second and the lateral surface parallel and level of second pipeline 2, and the domatic 211 of second sets up to the straight face 212 of second towards one side of first pipeline 1, can strengthen the structural thickness of second pipeline 2 butt joint department, and when first pipeline 1 and second pipeline 2 butt joint, first straight face 12 and the laminating of the straight face 212 of second.

Combine fig. 7 and fig. 8, first domatic 11 and the domatic 211 of second butt joint department welding have a plurality of solder joints 5, solder joint 5 is not welded thoroughly and punctures domaticly, a plurality of solder joints 5 are circumference array distribution along domatic circumferential direction, partial solder joint 5 and the first domatic 11 contact, the domatic 211 contact of part and second, this application does not do the injecing to solder joint 5's quantity, this embodiment uses four solder joints 5 as an example, not only can realize the initial joint to first pipeline 1 and second pipeline 2, and solder joint 5 is difficult for puncturing the butt joint of adjacent pipeline, thereby be difficult for forming weld beading 6 in first pipeline 1 and the inside butt joint of second pipeline 2.

Combine fig. 7 and fig. 8, pipe box 3 includes two half pipes 31 of relative setting, two half pipes 31 use 1 axis of first pipeline as central symmetry setting, two half pipes 31 are detained respectively and are located the outside of first pipeline 1 and 2 butt joints of second pipeline, two half pipes 31 end to end enclose into the annular die cavity with 1 outer wall looks adaptation of first pipeline, the junction of two half pipes 31 adopts continuous welding together, the laminating of annular die cavity part and 1 outer wall of first pipeline, the laminating of part and 2 outer walls of second pipeline.

Referring to fig. 7 and 8, the annular cavity cover is disposed outside the first slope 11 and the second slope 211, the annular cavity is correspondingly provided with a clamping groove 32 for accommodating the first slope 11 and the second slope 211, an inner wall of the clamping groove 32 is provided with a first inclined surface 321 and a second inclined surface 322, when the annular cavity cover is disposed outside the first slope 11 and the second slope 211, the first inclined surface 321 and the first slope 11 are attached to each other, and the length of the first inclined surface 321 is smaller than that of the first slope 11; the second inclined plane 322 and the second slope surface 211 are attached to each other, and the length of the second inclined plane 322 is smaller than that of the second slope surface 211.

The implementation principle of the embodiment is as follows: the method comprises the steps that first pipelines 1 and second pipelines 2 are aligned, at the moment, first straight surfaces 12 and second straight surfaces 212 are attached to each other, then four welding spots 5 are selected at the joint of a first slope surface 11 and a second slope surface 211 in a spot welding mode, the four welding spots 5 are distributed in a circumferential array along the circumferential direction of the joint of the first slope surface 11 and the second slope surface 211, and preliminary fixing of the first pipelines 1 and the second pipelines 2 is achieved; then one of the half pipes 31 is buckled at one side of the butt joint, so that the first inclined surface 321 of the half pipe 31 is attached to the first sloping surface 11, the second inclined surface 322 is attached to the second sloping surface 211, fixing the half pipe 31 at the outer parts of the first pipeline 1 and the second pipeline 2 by continuously welding the two ends of the half pipe 31, repeating the above operation, buckling the other half pipe 31 at the other side of the butt joint part, abutting the end parts of the two half pipes 31 against each other, and the two half pipes 31 are fixedly connected together by adopting a continuous welding mode at the butt joint of the two half pipes 31 without adopting an arc welding or electric welding mode at the butt joint of the first pipeline 1 and the second pipeline 2, make the difficult inside that forms at first pipeline 1 and second pipeline 2 of beading 6, the butt joint department of being convenient for sweep the line ball through first pipeline 1 and second pipeline 2 smoothly for it is difficult for the card in pipeline butt joint department to sweep the line ball.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The butt joint pipeline is characterized by comprising a first pipeline (1), a second pipeline (2) and a pipe sleeve (3), wherein the second pipeline (2) is in butt joint with the first pipeline (1), the pipe sleeve (3) is sleeved outside the butt joint position of the first pipeline and the second pipeline (2), and the pipe sleeve (3) is fixedly connected with the first pipeline (1), the pipe sleeve (3) and the second pipeline (2).

2. A butt-jointed pipe according to claim 1, wherein a plurality of welding spots (5) are fixedly arranged at the butt-joint position of the first pipe (1) and the second pipe (2), and the plurality of welding spots (5) are uniformly distributed along the circumferential direction of the first pipe (1).

3. A butt-jointed pipe according to claim 2, characterised in that the outer end surface of the welding spot (5) is provided as a cambered surface (51), and the radian of the cambered surface (51) is equal to the radian of the inner wall of the pipe sleeve (3).

4. The butt joint pipeline according to claim 2, wherein a butt joint end of the first pipeline (1) is provided with a first slope surface (11), a butt joint end of the second pipeline (2) is provided with a second slope surface (211), the first slope surface (11) and the second slope surface (211) are opposite in inclination direction, and the welding point (5) is arranged at the butt joint position of the first slope surface (11) and the second slope surface (211).

5. A docking station according to claim 4 wherein the first ramp (11) has a docking end internal diameter greater than or equal to the first pipe (1) internal diameter and the second ramp (211) has a docking end internal diameter greater than or equal to the second pipe (2) internal diameter.

6. A docking channel according to claim 4, characterized in that the outer end face of the welding spot (5) is flush with the outer end face of the first channel (1).

7. A butt-joint pipe according to claim 1, characterized in that the connection end of the pipe sleeve (3) to the first pipe (1) and the connection end of the pipe sleeve (3) to the second pipe (2) are continuously welded.

8. A butt-jointed pipe according to claim 4, characterised in that the pipe sleeve (3) comprises two oppositely arranged half-pipes (31), and the two half-pipes (31) are connected end to form an annular cavity matched with the outer wall of the first pipe (1).

9. The butt joint pipeline according to claim 8, wherein a clamping groove (32) is formed in the inner wall of the half pipe (31), a first inclined surface (321) and a second inclined surface (322) are arranged on the inner wall of the clamping groove (32), the first inclined surface (321) and the first slope surface (11) are attached to each other, and the second inclined surface (322) and the second slope surface (211) are attached to each other.

10. A docking conduit according to claim 9, characterized in that the length of the first ramp (321) is less than the length of the first ramp (11); the length of the second inclined plane (322) is less than that of the second slope plane (211).