Butt joint device for pipeline installation

Abstract

The utility model relates to a butt joint device for pipeline installation, which comprises an installation base, a centering clamping assembly, an auxiliary limiting assembly and an annular welding driving assembly capable of circumferentially moving around the butt joint end faces of two pipe bodies are supported on the installation base through a supporting assembly, the two centering clamping assemblies are detachably arranged on the outer sides of the pipe walls, close to the butt joint end faces, of the two pipe bodies in a sleeving mode, and the two auxiliary limiting assemblies are inserted into pipe cavities, away from the centering clamping assemblies, of the pipe bodies in an aligned mode. A reducing pipe sleeve is coaxially connected to a positioning ring sleeve of the centering clamping assembly in an inserted mode, and radial positioning pieces capable of being in linkage with the reducing pipe sleeve for limiting adjustment are arranged on the inner wall of the positioning ring sleeve in the circumferential direction at intervals in an inserted mode. According to the utility model, coaxial butt joint of pipe bodies with different sizes can be automatically realized, so that the butt joint precision is ensured, and meanwhile, a welding machine can be adjustably driven to perform controllable circular motion, so that the welding quality and effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection equipment, in particular to a butt joint device for pipeline installation. Background Art

[0002] A pipeline is a device composed of multiple parts such as pipes, pipe connectors, and valves, and is mainly used to transport gas, liquid, or liquid media with solid particles. In my country's petroleum, chemical, electric power, construction and other industries, pipeline docking technology is a very important link. When laying pipelines, the pipelines need to be spliced ​​and docked. When docking the pipelines, the pipe ends of the two pipes need to be aligned before welding. At present, conventional docking operations are usually based on manual control with the assistance of supporting equipment. The coaxial accuracy of the docking is limited by manual errors, and due to the limitations of the support structure and the obstruction of the weight of the pipe body, manual operation is difficult, the adjustment operation is cumbersome, and it is difficult to effectively eliminate the centering error.

[0003] When docking pipes, due to the limited accuracy of manual operation and the inability of traditional support structures to automatically complete coaxial centering and limiting, the pipe docking ports are misaligned, resulting in poor welding quality. Especially when docking pipes of different sizes, the large error in docking misalignment further increases the difficulty of docking, requiring more cumbersome height adjustment operations, making it difficult to achieve coaxial docking, resulting in a long pipeline welding cycle and reduced pipeline welding efficiency. In addition, the existing welding method requires the operator to continuously change the position of the handheld welding gun to achieve welding of the entire circumferential end face. During the circular rotation movement, displacement and shaking are very likely to occur, affecting the welding quality. Circumferential welding cannot be completed efficiently and continuously. The welding operation is difficult and requires the cooperation of multiple people, which increases labor costs. Utility Model Content

[0004] The purpose of the utility model is to provide a pipe installation docking device that can automatically achieve coaxial docking of pipes of different sizes to ensure docking accuracy, and can also adjustably drive a welding machine to perform controllable circular motion to improve welding quality and effect, so as to solve the problems that the existing docking support structure requires manual adjustment, has low centering accuracy and is prone to centering errors, requiring cumbersome adjustment operations, greatly reducing docking efficiency and docking quality, and the existing docking end face welding operation adopts a manual method, and the welding accuracy and accuracy are prone to fluctuations with circumferential welding movement, thereby reducing welding quality and welding effect.

[0005] The technical solution adopted by the present invention is: a docking device for pipeline installation, including a mounting base, on which a centering clamping assembly, an auxiliary limiting assembly and a circumferential welding drive assembly capable of circumferential movement around the end faces of two pipe bodies are supported by a support assembly, wherein the two centering clamping assemblies are detachably sleeved on the outer sides of the pipe walls of the two pipe bodies close to the docking end faces, and the two auxiliary limiting assemblies are inserted in the pipe cavities of the pipe bodies away from the centering clamping assemblies; a reducing pipe sleeve is coaxially inserted on the positioning ring sleeve of the centering clamping assembly, and radial positioning members that can be limited and adjusted in conjunction with the reducing pipe sleeve are inserted circumferentially at intervals on the inner wall of the positioning ring sleeve.

[0006] According to a preferred embodiment, the centering clamping assembly includes the positioning ring sleeve, the reducing tube sleeve, the radial positioning member, the first support base plate, the support block and the translation drive mechanism, wherein the positioning ring sleeve is supported on the first support base plate through the support block, and one end of the positioning ring sleeve is also inserted with the reducing tube sleeve installed on the first support base plate through the translation drive mechanism.

[0007] According to a preferred embodiment, first radial slots are circumferentially spaced apart on the inner annular surface of the sleeve body of the positioning ring sleeve, and second axial slots are circumferentially spaced apart on the outer annular surface of the sleeve body; the first radial slots are connected to the second axial slots through a through groove.

[0008] According to a preferred embodiment, on the inner wall of the outer sleeve of the reducer sleeve, there are circumferentially spaced limiting bevel plates that coincide with the plane defined by its axial and radial directions and at least part of the plate body is inserted into the second axial slot, and a guide connecting groove is provided on the side of the limiting bevel plate body close to the edge of its inclined plate wall.

[0009] According to a preferred embodiment, the guide rod of the radial positioning member is inserted into the second axial slot in a manner perpendicular to the limiting bevel plate body, and both ends of the rod body of the guide rod pass through the through slot and extend into the first radial slot, thereby being connected to the positioning rod coaxially inserted in the first radial slot, and the end of the positioning rod extending from the first radial slot to the inner cavity of the sleeve body is also connected to a positioning block that can abut against the outer wall of the tube body.

[0010] According to a preferred embodiment, the translation drive mechanism includes a first guide groove embedded in the first support base plate, a first rotating screw passing through the first guide groove, two translation plates threadedly connected to the first rotating screw, and a first translation drive motor transmission-connected to the end of the rod body of the first rotating screw passing through the groove wall of the first guide groove, wherein the top surface of the translation plate is connected to the bottom of the outer sleeve body of the reducer sleeve.

[0011] According to a preferred embodiment, the circumferential welding drive assembly includes a second support base plate supported on a third lifting support rod, a support column, a ring body, ring teeth, a rotation drive mechanism and a welding unit, wherein the ring body is supported on the second support base plate by two symmetrically arranged support columns, and ring teeth are provided on the inner ring surface of the ring body, and a rotation drive mechanism capable of circumferential rotation along its ring wall is also penetrated on the ring body, and the welding unit is connected to one end of the rotation drive mechanism inside the ring body.

[0012] According to a preferred embodiment, a ring groove is provided on the ring body to divide it into two parallel circular ring bodies, and the rotary drive mechanism is slidably inserted into the ring groove.

[0013] According to a preferred embodiment, the sliding arc plate of the rotary drive mechanism is positioned and inserted in the annular groove in a manner that allows for circumferential sliding, and a transmission shaft is rotatably inserted on the sliding arc plate through a rotating bearing, the radial inner end of the transmission shaft is connected to an engaging bevel tooth engaged with the annular tooth, and the end of the engaging bevel tooth away from the transmission shaft is connected to the welding unit through a telescopic adjustment rod; the radial outer end of the transmission shaft is also connected to a rotating motor.

[0014] According to a preferred embodiment, a plurality of retractable inner support rods are circumferentially spaced apart on the transverse insertion column of the auxiliary limiting assembly, so that the abutment blocks connected to the ends of the retractable inner support rods can be adjusted to press against the inner wall of the tube body.

[0015] The beneficial effects of the utility model are:

[0016] The reducer sleeve 32 provided in the present application can be adjusted to translate axially and change the overlapping length between it and the positioning ring sleeve, so that it can simultaneously push the radial positioning members inserted in the circumferential space on the positioning ring sleeve to radially expand and contract by the same distance and change the length extended into the positioning ring sleeve, thereby realizing the centering clamping and limiting of pipe bodies of different sizes in the positioning ring sleeve, so as to ensure that when pipe bodies of different sizes are effectively clamped, their axes coincide with the axes of the positioning ring sleeve, so as to accurately locate the centering state of the pipe body, and then the two coaxial centering clamping components can effectively limit the coaxial state of two pipe bodies of the same or different sizes, so as to ensure the accuracy and centering precision of docking. The auxiliary limiting component provided in the present application can internally support and limit the end of the pipe body away from the centering clamping component, so that the auxiliary limiting component can cooperate with the centering clamping component to support the pipe body in the air, so as to ensure the stability and accuracy of the coaxial docking of the two pipe bodies. The circumferential welding drive assembly provided in the present application can define a circular motion path, so that the welding unit can be adjusted to perform circular motion, and then the circumferential welding of the entire butt end face can be completed smoothly and continuously, thereby ensuring the completeness and effectiveness of the welding, avoiding abnormal problems such as welding breakpoints and welding dislocations, improving welding quality and welding efficiency, and reducing welding difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a preferred pipe installation docking device proposed by the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the overlapping area of ​​a positioning ring sleeve and a reducer sleeve of a preferred pipe installation docking device proposed by the present invention;

[0019] Figure 3 This is a partial structural diagram of a circumferential welding drive assembly of a preferred pipe installation butt-jointing device proposed by the present invention;

[0020] Figure 4 It is a partial plan view of a circumferential welding drive assembly of a preferred butt joint device for pipe installation proposed by the present invention.

[0021] Reference Signs List

[0022] 1: Mounting base; 2: Support assembly; 3: Centering clamping assembly; 4: Auxiliary limiting assembly; 5: Circumferential welding drive assembly; 21: First lifting support rod; 22: Second lifting support rod; 23: Third lifting support rod; 31: Positioning ring sleeve; 32: Reducer sleeve; 33: Radial positioning member; 34: First supporting base plate; 35: Support block; 36: Translation drive mechanism; 41: Second guide groove; 42: Translation block; 43: Second rotating screw; 44: Second translation drive motor; 45: Support column; 46: Horizontal insertion column; 47: Telescopic inner support rod; 48: Abutment block; 51: Second supporting base plate; 52: Support column; 53: Ring body; 54: Ring gear; 55: Rotation drive mechanism; 56: Welding unit; 311: Sleeve body; 312: First radial slot; 313: Second axial slot; 314: Through slot; 321: Outer sleeve body; 322: Limiting bevel plate; 323: Guide connection slot; 331: Guide rod; 332: Positioning rod; 333: Positioning block; 361: First guide slot; 362: Translation plate; 363: First rotating screw; 364: First translation drive motor; 531: Ring groove; 551: Transmission shaft; 552: Engaging bevel gear; 553: Sliding arc plate; 554: Rotating bearing; 555: Rotating motor; 556: Telescopic adjustment rod. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] The following will describe in detail the technical solutions provided by the present invention by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In some cases, some implementations are not described or are not described in detail because they belong to existing or conventional technologies.

[0025] In addition, the technical features described herein, or the steps of all methods or processes disclosed herein, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the order of steps or operations of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is for illustrative purposes only and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0026] The serial numbers assigned to components herein, such as "first" and "second," are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" in this application, where reasonable (and not self-contradictory), include both direct and indirect connections (couplings).

[0027] The following is a detailed description with reference to the accompanying drawings.

[0028] Example 1

[0029] The present application provides a docking device for pipeline installation, which includes a mounting base 1, a support assembly 2, a centering clamping assembly 3, an auxiliary limiting assembly 4 and a circumferential welding drive assembly 5.

[0030] according to Figure 1-4In a specific embodiment shown, a centering clamping assembly 3, an auxiliary limiting assembly 4, and a circumferential welding drive assembly 5 capable of circumferential movement around the opposing end faces of two pipe bodies are supported on a mounting base 1 via a support assembly 2. The two centering clamping assemblies 3 are detachably mounted on the outer sides of the pipe walls of the two pipe bodies near the butting end faces. The two auxiliary limiting assemblies 4 are inserted into the lumen of the pipe bodies away from the centering clamping assemblies 3. A reducing sleeve 32 is coaxially inserted into the positioning ring 31 of the centering clamping assembly 3. Radial locating members 33 capable of position adjustment in conjunction with the reducing sleeve 32 are inserted circumferentially at intervals on the inner wall of the positioning ring 31. The reducing sleeve 32 drives the radial locating members 33 to move radially within the positioning ring 31 by changing the overlapping length between the reducing sleeve 32 and the positioning ring 31, thereby selectively centering, clamping, and limiting pipe bodies of different diameters. The reducer sleeve 32 provided in the present application can be adjusted to perform axial translation and change the overlapping length between it and the positioning ring sleeve 31, so that it can simultaneously push the radial positioning members 33 inserted in the circumferential space on the positioning ring sleeve 31 to radially expand and contract by the same distance and change the length extended into the positioning ring sleeve 31, thereby realizing the centering clamping and limiting of pipe bodies of different sizes in the positioning ring sleeve 31, so as to ensure that when pipe bodies of different sizes are effectively clamped, their axes coincide with the axes of the positioning ring sleeve 31, so as to accurately locate the centering state of the pipe body, and then the two coaxial centering clamping assemblies 3 can effectively limit the coaxial state of two pipe bodies of the same or different sizes, so as to ensure the accuracy and centering precision of docking. The auxiliary limiting assembly 4 provided in the present application can internally support and limit the end of the pipe body away from the centering clamping assembly 3, so that the auxiliary limiting assembly 4 can cooperate with the centering clamping assembly 3 to support the pipe body in the air, so as to ensure the stability and accuracy of the coaxial docking of the two pipe bodies. The circumferential welding drive assembly 5 provided in the present application can define a circular motion path, so that the welding unit 56 can be adjusted to perform circular motion, and then the circumferential welding of the entire butt end face can be completed smoothly and continuously, thereby ensuring the completeness and effectiveness of the welding, avoiding abnormal problems such as welding breakpoints and welding dislocations, improving welding quality and welding efficiency, and reducing welding difficulty.

[0031] Preferably, the support assembly 2 includes a first lifting support rod 21, a second lifting support rod 22, and a third lifting support rod 23, each of which can adjust the height of the centering clamping assembly 3, the auxiliary limiting assembly 4, and the circumferential welding drive assembly 5. The second lifting support rod 22 can adjustably change the height of the auxiliary limiting assembly 4 so that the auxiliary limiting assembly 4 can maintain a coaxial state with pipes of different sizes.

[0032] Preferably, the centering clamping assembly 3 includes a positioning ring 31, a reducing sleeve 32, a radial positioning member 33, a first supporting base plate 34, a support block 35, and a translation drive mechanism 36. Preferably, the positioning ring 31 is supported on the first supporting base plate 34 via the support block 35. Preferably, one end of the positioning ring 31 is further inserted with a reducing sleeve 32 mounted on the first supporting base plate 34 via the translation drive mechanism 36, so that the reducing sleeve 32, driven by the translation drive mechanism 36, changes the overlapping length between the reducing sleeve 32 and the positioning ring 31, thereby adjusting the length of the radial positioning member 33 inserted into the inner cavity of the positioning ring 31. This allows the pipe to be adjustedly clamped and positioned at multiple points in an annular direction, allowing pipes of different diameters to be coaxially clamped within the positioning ring 31. The reducing sleeve 32 provided in the present application can be driven by the translation drive mechanism 36 to undergo axial translation, thereby changing the length of its sleeve on the positioning ring 31. This allows it to change the length of the radial positioning member 33 extending into the inner cavity of the positioning ring 31 during the above-mentioned translation process, thereby effectively abutting against the outer wall of tubes of different sizes to clamp the tubes coaxially with the positioning ring 31 and position them in the positioning ring 31. The first support base 34 provided in the present application is supported on the first lifting support rod 21.

[0033] Preferably, first radial slots 312 are circumferentially spaced apart on the inner annular surface of the sleeve body 311 of the positioning ring 31. Preferably, second axial slots 313 are also circumferentially spaced apart on the outer annular surface of the sleeve body 311. Preferably, the first radial slots 312 communicate with the second axial slots 313 via a through-groove 314. Preferably, a group of first radial slots 312 includes two parallel grooves symmetrically arranged on either side of the second axial slot 313. Further preferably, multiple groups of first radial slots 312 are circumferentially spaced apart. The first radial slots 312 provided in the present application can accommodate the positioning rod 332, thereby defining the translational direction of the positioning rod 332. This allows the positioning rod 332 to be synchronously driven by the translational movement of the reducer sleeve 32, thereby undergoing directional translation within the constraints of the first radial slots 312, thereby varying the length of the positioning rod extending from the first radial slot 312 to effectively abut against the surfaces of pipes of different sizes. The second axial slot 313 can be used to accommodate the limiting bevel plate 322 and part of the guide rod 331, so that the guide rod 331 movably inserted in the guide connection groove 323 of the limiting bevel plate 322 can, when the limiting bevel plate 322 is translated, pull the guide rod 331 in the guide connection groove 323 in the inclined state to perform vertical lifting and lowering movements only in the direction limited by the first radial slot 312. This is because both ends of the guide rod 331 are connected to the positioning rod 332, so that its movement direction is limited by the movable direction of the positioning rod 332.

[0034] Preferably, on the inner wall of the outer sleeve body 321 of the reducer sleeve 32, there are circumferentially spaced apart positioning bevel plates 322, which coincide with the plane defined by the axial and radial directions thereof and at least partially insert into the second axial slot 313. Further preferably, a guide connection groove 323 is provided on one side of the positioning bevel plates 322 near the edge of the inclined plate wall. Specifically, the guide rod 331 of the radial positioning member 33 is movably inserted into the guide connection groove 323, so that when the outer sleeve body 321 drives the positioning bevel plates 322 to undergo axial translation and change the axial length of the positioning bevel plates 322 in the guide connection groove 323, the guide rod 331 is restricted by the guide connection groove 323 and undergoes radial translation, thereby changing the length of the radial positioning member 33 inserted into the sleeve body 311.

[0035] Preferably, the guide rod 331 of the radial positioning member 33 is inserted into the second axial slot 313 perpendicularly to the limiting bevel plate 322. Preferably, both ends of the guide rod 331 extend through the through slot 314 into the first radial slot 312, thereby connecting with the positioning rod 332 coaxially inserted in the first radial slot 312. Preferably, the end of the positioning rod 332 extending from the first radial slot 312 into the inner cavity of the sleeve body 311 is further connected to a positioning block 333 capable of abutting against the outer wall of the tube body. Preferably, when the guide rod 331 translates radially along the sleeve body 311 driven by the limiting bevel plate 322, the positioning rod 332 also translates synchronously within the first radial slot 312, causing the positioning block 333 to synchronously change its radial position within the inner cavity of the sleeve body 311 and adjustably abut against the outer wall of tubes of different diameters, thereby achieving adjustable tube abutment and limiting.

[0036] Preferably, the translation drive mechanism 36 includes a first guide slot 361 embedded in the first support base plate 34, a first rotating screw 363 extending through the first guide slot 361, two translation plates 362 threadedly connected to the first rotating screw 363, and a first translation drive motor 364 drivingly connected to the end of the first rotating screw 363 extending through the slot wall of the first guide slot 361. Preferably, the top surface of the translation plate 362 is connected to the bottom of the outer sleeve 321 of the reducer sleeve 32. Therefore, the translation plate 362, with its movement direction restricted by the first guide slot 361, undergoes directional translation as the first rotating screw 363 rotates, thereby varying the length of the outer sleeve 321 within the sleeve body 311.

[0037] Preferably, the auxiliary limiting assembly 4 includes a second guide groove 41, a translation block 42, a second rotating screw 43, a second translation drive motor 44, a support column 45, a transverse column 46, a telescopic inner support rod 47 and a stop block 48. Preferably, the second guide groove 41 is supported on the second lifting support rod 22. A second rotating screw 43 coinciding with its slotting direction is inserted into the groove cavity of the second guide groove 41. Preferably, a translation block 42 is threadedly sleeved on the rod body of the second rotating screw 43. One end of the second rotating screw 43 passes through the second guide groove 41 and is transmission-connected to the second translation drive motor 44 located outside the second guide groove 41, so that the rotation of the second rotating screw 43 can drive the translation block 42 whose movement direction is limited by the second guide groove 41 to perform directional translation. Preferably, a support column 45 is supported on the translation block 42. Further preferably, the top of the support column 45 is connected to a transverse insertion column 46 that can be coaxially inserted into the tube body. Preferably, a plurality of retractable telescopic inner support rods 47 are circumferentially spaced apart on the transverse insertion column 46, so that the abutment blocks 48 connected to the ends of the telescopic inner support rods 47 can be adjusted to press against the inner wall of the tube body.

[0038] Preferably, the annular welding drive assembly 5 includes a second support base 51 supported on the third lifting support rod 23, support columns 52, a ring body 53, ring gears 54, a rotary drive mechanism 55, and a welding unit 56. Preferably, the ring body 53 is supported on the second support base 51 by two symmetrically arranged support columns 52. Preferably, the inner surface of the ring body 53 is provided with ring gears 54. Preferably, the ring body 53 is also provided with a rotary drive mechanism 55 capable of circumferential rotation along its annular wall. Preferably, one end of the rotary drive mechanism 55 within the ring body 53 is connected to the welding unit 56. Preferably, an annular groove 531 is defined in the ring body 53, dividing it into two parallel circular rings, and the rotary drive mechanism 55 is slidably inserted into the annular groove 531. Preferably, the sliding arc plate 553 of the rotary drive mechanism 55 is inserted into the annular groove 531 so as to be circumferentially slidable. Preferably, a transmission shaft 551 is rotatably inserted into the sliding arc plate 553 via a rotating bearing 554. Preferably, the radially inner end of the transmission shaft 551 is connected to meshing bevel gears 552 that mesh with the ring gears 54. Preferably, the end of the meshing bevel gears away from the transmission shaft 551 is connected to the welding unit 56 via a telescopic adjustment rod 556. Preferably, a rotary motor 555 is also connected to the radially outer end of the transmission shaft 551. Preferably, the rotary motor 555 is fixedly supported on the sliding arc plate 553, so that the rotary motor 555 can drive the transmission shaft 551 to rotate relative to the ring gear 54.

[0039] The present utility model is not limited to the above-mentioned optional implementation methods. Anyone can derive other forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, any technical solution that falls within the scope defined by the claims of the present utility model falls within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A pipe installation docking device, comprising a mounting base (1), characterized in that: A centering clamping assembly (3), an auxiliary limiting assembly (4), and a circumferential welding drive assembly (5) capable of circumferential movement around the end faces of two opposing pipe bodies are supported on the mounting base (1) via a supporting assembly (2), wherein: The two centering clamping assemblies (3) are detachably sleeved on the outer sides of the tube walls of the two tube bodies close to the butting end faces, and the two auxiliary limiting assemblies (4) are aligned and inserted into the tube cavities of the tube bodies away from the centering clamping assemblies (3); A reducing sleeve (32) is coaxially inserted into the positioning ring sleeve (31) of the centering clamping assembly (3), and radial positioning members (33) capable of performing position limiting adjustment in conjunction with the reducing sleeve (32) are circumferentially inserted at intervals on the inner wall of the positioning ring sleeve (31).

2. The pipe installation docking device according to claim 1, wherein: The centering clamping assembly (3) comprises the positioning ring sleeve (31), the reducing sleeve (32), the radial positioning member (33), a first supporting base plate (34), a supporting block (35) and a translation drive mechanism (36), wherein: The positioning ring sleeve (31) is supported on the first supporting base plate (34) through a supporting block (35), and one end of the positioning ring sleeve (31) is also sleeved with the reducing pipe sleeve (32) installed on the first supporting base plate (34) through the translation drive mechanism (36).

3. The pipe installation docking device according to claim 2, wherein: First radial slots (312) are circumferentially spaced apart on the inner annular surface of the sleeve body (311) of the positioning ring sleeve (31), and second axial slots (313) are circumferentially spaced apart on the outer annular surface of the sleeve body (311); The first radial slot (312) is connected to the second axial slot (313) through a through slot (314).

4. The pipe installation docking device according to claim 3, characterized in that: On the inner wall of the outer sleeve (321) of the reducer sleeve (32), there are circumferentially spaced apart limiting bevel plates (322) which coincide with the plane defined by the axial and radial directions thereof and at least part of which is inserted into the second axial slot (313), and a guide connection groove (323) is provided on one side of the limiting bevel plate (322) close to the edge of its inclined plate wall.

5. The pipe installation docking device according to claim 4, characterized in that: The guide rod (331) of the radial positioning member (33) is inserted into the second axial slot (313) in a manner perpendicular to the limiting bevel plate (322). Both ends of the guide rod (331) pass through the through slot (314) and extend into the first radial slot (312), thereby being connected to the positioning rod (332) coaxially inserted into the first radial slot (312). The end of the positioning rod (332) extending from the first radial slot (312) to the inner cavity of the sleeve body (311) is also connected to a positioning block (333) capable of resting on the outer wall of the sleeve body.

6. The pipe installation docking device according to claim 5, characterized in that: The translation drive mechanism (36) comprises a first guide groove (361) embedded in a first supporting base plate (34), a first rotating screw (363) passing through the first guide groove (361), two translation plates (362) threadedly connected to the first rotating screw (363), and a first translation drive motor (364) drivingly connected to the end of the rod body of the first rotating screw (363) passing through the groove wall of the first guide groove (361), wherein: The top surface of the translation plate (362) is connected to the bottom of the outer sleeve body (321) of the reducer sleeve (32).

7. The pipe installation docking device according to claim 6, characterized in that: The annular welding drive assembly (5) comprises a second support base plate (51) supported on a third lifting support rod (23), a support column (52), a ring body (53), annular teeth (54), a rotation drive mechanism (55) and a welding unit (56), wherein: The ring body (53) is supported on the second supporting base plate (51) by two symmetrically arranged supporting columns (52), and annular teeth (54) are provided on the inner annular surface of the ring body (53). A rotating drive mechanism (55) capable of performing circumferential rotation along its annular wall is also provided on the ring body (53), and one end of the rotating drive mechanism (55) located inside the ring body (53) is connected to a welding unit (56).

8. The pipe installation docking device according to claim 7, wherein: The ring body (53) is provided with a ring groove (531) for dividing the ring body into two parallel circular ring bodies, and the rotary drive mechanism (55) is slidably inserted into the ring groove (531).

9. The pipe installation docking device according to claim 8, characterized in that: The sliding arc plate (553) of the rotary drive mechanism (55) is inserted into the annular groove (531) in a manner capable of circumferential sliding, and a transmission shaft (551) is rotatably inserted into the sliding arc plate (553) via a rotating bearing (554). The radial inner end of the transmission shaft (551) is connected to an engaging bevel tooth (552) engaged with the ring tooth (54), and the end of the engaging bevel tooth away from the transmission shaft (551) is connected to the welding unit (56) via a telescopic adjustment rod (556); The radial outer end of the transmission shaft (551) is also connected to a rotating motor (555).

10. The pipe installation docking device according to claim 9, wherein: A plurality of retractable inner support rods (47) are arranged at intervals in an annular direction on the transverse insertion column (46) of the auxiliary limiting assembly (4), so that the abutment blocks (48) connected to the ends of the retractable inner support rods (47) can be adjusted to press against the inner wall of the tube body.

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