Attitude adjustment mechanism for in-pipe welding machine and in-pipe welding machine

Abstract

The invention discloses a posture adjustment mechanism for an in-pipeline welder, which comprises: a posture adjustment plate, which is arranged in a vertical direction; a plurality of moving wheel mounting brackets, which are symmetrically and obliquely arranged on the front end surface of the posture adjustment plate, the rear end of the moving wheel mounting bracket is rotatably connected to the posture adjustment plate, and the moving wheels of the plurality of in-pipeline welders are respectively arranged at the front end of each moving wheel mounting bracket; a driving component, which is used to drive the moving wheel mounting bracket to rotate around the rotating connection end of the moving wheel mounting bracket, and the moving wheel mounting bracket drives the moving wheel to move obliquely, so that when the in-pipeline welder passes through a curved pipe section of a pipeline, the plurality of moving wheels can adjust their respective distances relative to the central axis of the in-pipeline welder, so as to ensure that the body posture of the in-pipeline welder remains unchanged, thereby avoiding affecting the position of the welding head and causing a decrease in welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of in-pipeline welding machines, and in particular to a posture adjustment mechanism for an in-pipeline welding machine and the in-pipeline welding machine. Background Art

[0002] At present, in the process of long-distance pipeline construction at home and abroad, most of them need to use automatic welding equipment to carry out automatic construction welding of pipelines, and the use of automatic welding construction technology for long-distance pipelines has been widely recognized by construction companies, especially the use of pipeline internal welding machines for automatic construction welding of pipelines, which not only improves the welding quality, but also improves the welding efficiency, creating good pipe conditions for later pipeline maintenance and inspection. However, the existing pipeline internal welding machines are mostly used in plain terrain, and have strict scene requirements for the bending radius of the pipeline. The terrain scene adaptability of mountainous areas with multiple bends (the minimum bend is 6D, D is the outer diameter of the pipeline) is low, resulting in strict scene requirements for the bending radius of the pipeline and low penetration rate of automatic welding technology for long-distance pipelines in mountainous areas. In addition, the operating posture of the existing pipeline internal welding machine in the pipeline is manually adjusted without quantitative adjustment, and the controllable accuracy of the operating posture is low, which will affect the initial welding position of multiple welding heads, thereby reducing the weld lap quality and construction efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a posture adjustment mechanism for an in-pipeline welder and an in-pipeline welder, which are beneficial to improving movement stability, welding quality and welding construction efficiency.

[0004] In order to achieve the above-mentioned object, the first aspect of the present invention provides a posture adjustment mechanism for a pipeline in-line welding machine, the posture adjustment mechanism comprising:

[0005] An attitude adjustment plate is arranged in a vertical direction;

[0006] A plurality of moving wheel mounting brackets, the plurality of moving wheel mounting brackets are symmetrically and obliquely arranged on the front end surface of the posture adjustment plate, the rear end of the moving wheel mounting brackets is rotatably connected to the posture adjustment plate, and the moving wheels of the plurality of in-pipe welding machines are respectively arranged at the front end of each moving wheel mounting bracket;

[0007] The driving component is used to drive the moving wheel mounting bracket to rotate around the rotating connection end of the moving wheel mounting bracket, so that the moving wheel mounting bracket drives the moving wheel to move tiltedly.

[0008] In an embodiment of the present invention, there are multiple driving components, and the multiple driving components are driven and connected to the multiple moving wheel mounting brackets in a one-to-one correspondence. The driving components include a driving part and a telescopic part. The telescopic part includes a first axis, a second axis and a telescopic rod connected to the moving wheel mounting bracket at the lower end. The first axis and the second axis are arranged opposite to each other and fixedly connected up and down. The upper end of the first axis is connected to the posture adjustment plate. A moving channel is formed inside the second axis. The telescopic rod is arranged in the moving channel and moves up and down along the moving channel under the drive of the driving part.

[0009] In an embodiment of the present invention, a first mounting column extending forward is provided on the front end surface of the posture adjustment plate, the upper end of the first shaft is rotatably connected to the first mounting column, a second mounting column is provided on the moving wheel mounting bracket, and the lower end of the telescopic rod is rotatably connected to the second mounting column.

[0010] In an embodiment of the present invention, the driving part includes a motor, a driving wheel and a driven wheel. The driving wheel and the motor are driven and connected to form an external meshing with the driven wheel. The interiors of the first shaft and the second shaft jointly form a driven wheel mounting cavity. The driven wheel is arranged in the driven wheel mounting cavity. The telescopic rod passes through the interior of the driven wheel and forms an internal meshing with the driven wheel.

[0011] In an embodiment of the present invention, the posture adjustment mechanism further includes a shock absorbing assembly arranged on the moving wheel mounting bracket.

[0012] In an embodiment of the present invention, the shock absorbing assembly includes an upper connecting body, a lower connecting body, a connecting column and an elastic member, the upper connecting body is connected to the posture adjustment plate, the lower connecting body is connected to the movable wheel mounting bracket, the connecting column includes a rod portion and a limiting end portion arranged at the top end of the rod portion, the bottom end of the rod portion passes through the upper connecting body and forms a threaded connection with the lower connecting body, the elastic member is sleeved on the rod portion and the upper end of the elastic member is connected to the upper connecting body, and the lower end of the elastic member rests on the lower connecting body.

[0013] In an embodiment of the present invention, a third mounting post extending forward is provided on the front end surface of the posture adjustment plate, the upper end of the upper connector is rotatably connected to the third mounting post, and the lower end of the lower connector is rotatably connected to the second mounting post.

[0014] In an embodiment of the present invention, the pipeline in-line welding machine includes a front body and a rear body, the posture adjustment plate is arranged at the rear end of the front body, the front end of the rear body is provided with a connecting plate, and the posture adjustment mechanism also includes a flexible connection component with the posture adjustment plate and the connecting plate respectively connected at both ends.

[0015] In an embodiment of the present invention, the flexible connection assembly includes a universal joint connection part, a left elastic support part and a right elastic support part. The front and rear ends of the universal joint connection part are respectively located on the vertical center axis of the posture adjustment plate and the connecting plate. The left elastic support part and the right elastic support part are symmetrically arranged on the left and right sides of the universal joint connection part.

[0016] A second aspect of the present invention provides an in-pipeline welder, which includes the above-mentioned posture adjustment mechanism for the in-pipeline welder.

[0017] Through the above technical solution, multiple moving wheel mounting brackets are symmetrically and obliquely arranged on the front end surface of the posture adjustment plate, the rear end of the moving wheel mounting bracket is rotatably connected to the posture adjustment plate, and the moving wheels of multiple in-pipe welders are respectively arranged at the front end of each moving wheel mounting bracket; the driving component drives the moving wheel mounting bracket to rotate around the rotating connection end of the moving wheel mounting bracket, and the moving wheel mounting bracket drives the moving wheel to move obliquely, so that when the in-pipe welder passes through the curved pipe section of the pipeline, the multiple moving wheels can adjust their respective distances relative to the central axis of the in-pipe welder to ensure that the body posture of the in-pipe welder remains unchanged, thereby avoiding affecting the position of the welding head and causing a decrease in welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0019] Figure 1 is a schematic diagram of the first viewing angle structure of the posture adjustment mechanism in an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the second viewing angle structure of the posture adjustment mechanism in an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the cross-sectional view of the driving component in an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the oblique viewing angle structure of the driving component in an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the structure of a shock absorbing assembly from a cross-sectional perspective in an embodiment of the present invention;

[0024] Figure 6 is a schematic diagram of the oblique viewing angle structure of the shock absorbing assembly in an embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of the partial structure of the posture adjustment mechanism in an embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the flexible connection component in an embodiment of the present invention.

[0027] Description of Reference Numerals

[0028] 1 Attitude adjustment plate 101 First mounting column

[0029] 102 Third mounting column 2 Moving wheel mounting bracket

[0030] 201 Second mounting column 3 Moving wheel

[0031] 4 Driving component 401 driving part

[0032] 402 telescopic part 403 first shaft

[0033] 404 second axis 405 telescopic rod

[0034] 406 Motor 407 Driven wheel

[0035] 5 Shock absorber assembly 501 upper connector

[0036] 5011 First column 5012 First ring

[0037] 502 lower connecting body 5021 second column

[0038] 5022 second annular body 503 connecting column

[0039] 5031 Rod 5032 Limiting end

[0040] 504 elastic member 6 connecting plate

[0041] 7 Flexible connection assembly 701 Universal joint connection

[0042] 702 left elastic support portion 703 right elastic support portion

[0043] 8 First fisheye bearing 9 Second fisheye bearing

[0044] 10 Speed ​​reducer 11 Housing

[0045] 12 Stop screw 13 Stop washer

[0046] 14 Third fisheye bearing 15 Fourth fisheye bearing DETAILED DESCRIPTION

[0047] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0048] The embodiment of the present invention provides a posture adjustment mechanism for a pipeline welding machine, which is suitable for a pipeline welding machine, such as Figure 1-8As shown, the posture adjustment mechanism includes a posture adjustment plate 1, a plurality of moving wheel mounting brackets 2 and a driving component 4. The in-pipe welder in this embodiment includes a plurality of moving wheels 3, wherein the plurality of moving wheels 3 include a left front wheel and a right front wheel of the in-pipe welder. The posture adjustment plate 1 is arranged in the vertical direction, and the plurality of moving wheel mounting brackets 2 are symmetrically and obliquely arranged on the front end surface of the posture adjustment plate 1. The plurality of moving wheel mounting brackets 2 in this embodiment include a left front wheel mounting bracket and a right front wheel mounting bracket, and the left front wheel mounting bracket and the right front wheel mounting bracket are respectively obliquely arranged on the left and right sides of the front end surface of the posture adjustment plate 1, and the rear end of the moving wheel mounting bracket 2 is rotatably connected to the posture adjustment plate 1, and the plurality of moving wheels 3 are respectively arranged at the front ends of the respective moving wheel mounting brackets 2, that is, the left front wheel is obliquely arranged at the front end of the left front wheel mounting bracket, and the right front wheel is obliquely arranged at the front end of the right front wheel mounting bracket, so that when the in-pipe welder moves in the pipeline, the rolling surface of the moving wheel 3 is as close to the inner wall surface of the pipeline as possible.

[0049] When the in-pipe welder in the prior art passes through a curved section of a pipeline, only the moving wheel 3 on one side can be in close contact with the inner wall surface of the pipeline, while the moving wheel 3 on the other side will be in a suspended state. The moving wheel 3 in the suspended state has no supporting force, which will cause the in-pipe welder to tilt. In addition, there is a situation where even if the moving wheels 3 on both sides of the in-pipe welder are in close contact with the inner wall surface of the pipeline, the body posture of the in-pipe welder still changes. Once the body posture of the in-pipe welder changes, the position of the welding head installed on the body will change. After the position of the welding head changes, the welding process of the in-pipe welder will be affected, and the welding quality of the weld will be reduced. Therefore, in the present embodiment, the driving component 4 is used to drive the moving wheel mounting bracket 2 to rotate around the rotating connection end of the moving wheel mounting bracket 2, so that the moving wheel mounting bracket 2 drives the moving wheel 3 to move tiltedly, that is, the moving wheel mounting bracket 2 can be driven by the driving component 4 to deflect upward or downward tilted around the rear end of the moving wheel mounting bracket 2, and the plurality of moving wheels 3 move with the movement of the moving wheel mounting bracket 2, so that when the in-pipe welder passes through the curved section of the pipeline, the left front wheel and the right front wheel can adjust their respective distances relative to the central axis of the in-pipe welder to ensure that the body posture of the in-pipe welder remains unchanged, thereby avoiding affecting the position of the welding head and causing a decrease in welding quality. For example, when the in-pipe welder passes through the curved section of the pipeline that turns left, the driving component 4 drives the left front wheel to deflect upward tiltedly and drives the right front wheel to deflect downward tiltedly, so that the left front wheel and the right front wheel can both fit against the inner wall of the pipeline, and the inner wall of the pipeline can support the left front wheel and the right front wheel.

[0050] In one embodiment of the present invention, there are multiple driving components 4, and the multiple driving components 4 are driven and connected to the multiple moving wheel mounting brackets 2 in a one-to-one correspondence. The driving component 4 includes a driving part 401 and a telescopic part 402. The telescopic part 402 includes a first shaft 403, a second shaft 404 and a telescopic rod 405 whose lower end is connected to the moving wheel mounting bracket 2. The first shaft 403 and the second shaft 404 are arranged opposite to each other and fixedly connected up and down. The upper end of the first shaft 403 is connected to the posture adjustment plate 1, and a moving channel is formed inside the second shaft 404. The telescopic rod 405 is arranged in the moving channel and moves up and down along the moving channel under the drive of the driving part 401. Specifically, in the present embodiment, there are two driving components 4, and the two driving components 4 drive the left front wheel mounting bracket and the right front wheel mounting bracket respectively; the first shaft 403 and the second shaft 404 (the first shaft 403 and the second shaft 404 are both stepped shafts) are arranged in the vertical direction, and the lower end of the first shaft 403 and the upper end of the second shaft 404 are connected together, the upper end of the telescopic rod 405 is drivingly connected to the driving part 401, and the lower end of the telescopic rod 405 is connected to the corresponding moving wheel mounting bracket 2. When the driving part 401 is actuated, the telescopic rod 405 moves up and down in the moving channel, thereby driving the moving wheel mounting bracket 2 connected thereto to deflect, and the position of the moving wheel 3 and the body posture of the welding machine in the pipeline are also adjusted accordingly.

[0051] In one embodiment of the present invention, a first mounting column 101 extending forward is provided on the front end surface of the posture adjustment plate 1, the upper end of the first shaft body 403 is rotatably connected to the first mounting column 101, a second mounting column 201 is provided on the moving wheel mounting bracket 2, and the lower end of the telescopic rod 405 is rotatably connected to the second mounting column 201. Specifically, the posture adjustment mechanism also includes a first fisheye bearing 8 and a second fisheye bearing 9, the upper end of the first fisheye bearing 8 is rotatably arranged at the front end of the first mounting column 101, and the lower end of the first fisheye bearing 8 is threadedly connected to the upper end of the first shaft body 403; the moving wheel mounting bracket 2 includes a first support plate and a second support plate arranged in parallel and spaced apart, the moving wheel 3 is pivotally arranged at the front ends of the first support plate and the second support plate and in the gap therebetween, and the moving wheel 3 is preferably a high-hardness rubber cast wheel installed with a support bearing; the moving wheel mounting bracket 2 also includes a second mounting column 201, the second mounting column 201 is located between the first support plate and the second support plate and its two ends are connected to the first support plate and the second support plate. The support plates are fixed together, the setting direction of the second mounting column 201 is consistent with the setting direction of the first support plate and the second support plate, the upper end of the second fisheye bearing 9 is threadedly connected to the lower end of the telescopic rod 405, and the lower end of the second fisheye bearing 9 is rotatably set on the second mounting column 201, wherein the first mounting column 101 and the second mounting column 201 are both fisheye bearing screws. The above structural design neither affects the driving action of the driving component 4, but also increases the overall movement flexibility of the driving component 4, that is, when the telescopic rod 405 is extended and retracted, the first fisheye bearing 8, the second fisheye bearing 9, each of which can achieve deflection within a certain angle range at the connection position with the attitude adjustment plate 1 and the moving wheel mounting bracket 2.

[0052] In one embodiment of the present invention, the driving unit 401 includes a motor 406, a driving wheel (not shown in the figure) and a driven wheel 407. The driving wheel and the motor 406 are driven and connected and form an external engagement with the driven wheel 407. The interiors of the first shaft 403 and the second shaft 404 jointly form a driven wheel mounting cavity. The driven wheel 407 is arranged in the driven wheel mounting cavity. The telescopic rod 405 passes through the interior of the driven wheel 407 and forms an internal engagement with the driven wheel 407. Specifically, the driving part 401 also includes a reducer 10 and a housing 11, the input end of the reducer 10 is drivingly connected to the driving end of the motor 406, the driving wheel is arranged at the output end of the reducer 10, and the driving wheel and the driven wheel 407 are provided with external teeth that form an external meshing between the two, the telescopic rod 405 is a screw and is passed through the driven wheel 407, and the driven wheel 407 is also provided with internal teeth that form an internal meshing with the above-mentioned screw. The above-mentioned structural design enables the axial movement of the telescopic rod 405 to be realized after the motor 406 is rotated; further, the motor 406, the reducer 10, and the driving wheel are all arranged on the driven wheel 407 (or the first On one side of a shaft body 403 and a second shaft body 404, the interior of the lower end of the first shaft body 403 and the interior of the upper end of the second shaft body 404 jointly form a driven wheel installation cavity for installing the driven wheel 407, and a accommodating cavity is formed inside the shell 11, and the driving wheel and the driven wheel 407 are arranged side by side in the accommodating cavity. The upper end of the shell 11 is connected with the reducer 10 and the first shaft body 403, and a circular hole is formed on the bottom surface of the shell 11 for part of the second shaft body 404 to pass downward. This design does not affect the driving performance of the driving component 4 and can shorten the overall length of the driving component 4, making the structure of the posture adjustment mechanism more compact.

[0053] In one embodiment of the present invention, the posture adjustment mechanism also includes a stop screw 12 and a stop gasket 13 arranged at the top of the telescopic rod 405. The stop screw 12 passes through the stop gasket 13 and is threadedly connected to the telescopic rod 405. The outer diameter of the stop gasket 13 is larger than the outer diameter of the telescopic rod 405. The above two can limit the axial movement of the telescopic rod 405, preventing the telescopic rod 405 from moving too much downward and separating from the driven wheel 407.

[0054] In one embodiment of the present invention, the posture adjustment mechanism further includes a guide key (not shown in the figure) disposed in the moving channel and used to guide the telescopic rod 405 .

[0055] In one embodiment of the present invention, the posture adjustment mechanism also includes a shock absorbing assembly 5 arranged on the moving wheel mounting bracket 2, and the deceleration assembly is inclined and its inclination direction is consistent with the inclination direction of the moving path, which is used to buffer and shock the moving wheel 3 when it passes through the undulating pipe wall; further, the shock absorbing assembly 5 in this embodiment is arranged between the moving wheel 3 and the driving component 4. Since there is a certain time interval between the controller of the in-pipe welding machine issuing a control instruction and the driving component 4 starting to execute the driving action, the above-mentioned structural design enables the moving wheel 3 to pass through the undulating pipe wall or pass through the curved pipe section. The shock absorbing assembly 5 takes effect before the driving component 4, which is conducive to the smooth adjustment of the position of the moving wheel 3.

[0056] In one embodiment of the present invention, the shock absorbing assembly 5 includes an upper connector 501, a lower connector 502, a connecting column 503 and an elastic member 504. The upper connector 501 is connected to the posture adjustment plate 1, and the lower connector 502 is connected to the movable wheel mounting bracket 2. The connecting column 503 includes a rod portion 5031 and a limiting end portion 5032 arranged at the top of the rod portion 5031. The bottom end of the rod portion 5031 passes through the upper connector 501 and forms a threaded connection with the lower connector 502. The elastic member 504 is sleeved on the rod portion 5031 and the upper end of the elastic member 504 is connected to the upper connector 501, and the lower end of the elastic member 504 rests on the lower connector 502. Specifically, the upper connecting body 501 includes a first column 5011 and a first annular body 5012 arranged on the outside of the first column 5011, the top of the first column 5011 is connected to the posture adjustment plate 1, and the bottom of the first column 5011 is formed with a concave cavity; the lower connecting body 502 includes a second column 5021 and a second annular body 5022 arranged on the outside of the second column 5021, the top of the second column 5021 is formed with a convex column protruding upward and extending into the concave cavity, and the bottom of the second column 5021 is connected to the moving wheel mounting bracket 2; a plurality of first through holes uniformly spaced circumferentially are formed on the first annular body 5012, and a plurality of second through holes uniformly spaced circumferentially are formed on the second annular body 5022, and the positions of the first through holes and the second through holes are aligned. The number of connecting columns 503 corresponds to the number of the first through hole and the second through hole, the bottom end of the rod 5031 passes through the first through hole and extends into the second through hole, the bottom end of the rod 5031 is provided with an external thread, and the second through hole is provided with an internal thread, so that a threaded connection is formed between the rod 5031 and the lower connecting body 502, and the limiting end 5032 is located above the first annular body 5012 to prevent the upper connecting body 501 and the lower connecting body 502 from being completely separated; the elastic member 504 in this embodiment is a spring, which is sleeved on the outer periphery of the rod 5031 and its upper end is connected to the first annular body 5012, and the lower end of the spring is against the second annular body 5022, and the buffering and shock-absorbing effects on the moving wheel 3 are achieved by the extension or compression of the spring.

[0057] In one embodiment of the present invention, a third mounting column 102 extending forward is provided on the front end surface of the posture adjustment plate 1, the upper end of the upper connecting body 501 is rotatably connected to the third mounting column 102, and the lower end of the lower connecting body 502 is rotatably connected to the second mounting column 201. Specifically, the posture adjustment mechanism also includes a third fisheye bearing 14 and a fourth fisheye bearing 15. The upper end of the third fisheye bearing 14 is rotatably arranged at the front end of the third mounting column 102, and the lower end of the third fisheye bearing 14 is threadedly connected to the upper end of the first column 5011; the upper end of the fourth fisheye bearing 15 is threadedly connected to the lower end of the second column 5021, and the lower end of the fourth fisheye bearing 15 is rotatably arranged on the second mounting column 201, wherein the third mounting column 102 is a fisheye bearing screw. The above structural design neither affects the buffering and shock absorbing effect of the shock absorbing assembly 5, nor increases the overall movement flexibility of the shock absorbing assembly 5, that is, when the shock absorbing assembly 5 is subjected to shock absorbing adjustment, the third fisheye bearing 14 and the fourth fisheye bearing 15 can achieve deflection within a certain angle range at the connection positions with the posture adjustment plate 1 and the moving wheel mounting bracket 2, respectively.

[0058] In one embodiment of the present invention, the pipeline in-line welder includes a front body and a rear body, a posture adjustment plate 1 is arranged at the rear end of the front body, a connecting plate 6 is arranged at the front end of the rear body, and the posture adjustment mechanism also includes a flexible connection component 7 whose two ends are respectively connected to the posture adjustment plate 1 and the connecting plate 6. Specifically, since the posture adjustment plate 1 is arranged at the rear end of the front body, all components arranged on the front side of the posture adjustment plate 1 (such as the left front wheel, the right front wheel, the shock absorbing component 5 and the driving component 4, etc.) belong to the front body, the connecting plate 6 is located at the rear side of the posture adjustment plate 1 and is arranged at a distance from the posture adjustment plate 1, and a flexible connection component 7 is arranged in the interval between the connecting plate 6 and the posture adjustment plate 1, which increases the movement flexibility of the pipeline in-line welder, that is, the front body and the rear body can be in different movement postures, such as when the pipeline in-line welder passes through the curved pipe section of the pipeline, the front body can deflect before the rear body, so that the bending ability of the pipeline in-line welder is improved.

[0059] In one embodiment of the present invention, the flexible connection assembly 7 includes a universal joint connection part 701, a left elastic support part 702 and a right elastic support part 703. The front and rear ends of the universal joint connection part 701 are respectively located on the vertical center axis of the posture adjustment plate 1 and the connecting plate 6. The left elastic support part 702 and the right elastic support part 703 are symmetrically arranged on the left and right sides of the universal joint connection part 701. Specifically, the universal joint connection part 701 includes a first connection part and a second connection part. The front end of the first connection part is fixed to the posture adjustment plate 1, the rear end of the first connection part and the front end of the second connection part are rotationally connected in the form of a universal joint (the second connection part can be rotated in any direction relative to the first connection part), and the rear end of the second connection part is fixed to the connecting plate 6. This connection method can prevent the front vehicle body from affecting the rear vehicle body when changing its motion posture; the left elastic support part 702 and the right elastic support part 703 are both multiple springs. The multiple springs belonging to the left elastic support part 702 are arranged on the left side of the universal joint connection part 701, and the multiple springs belonging to the right elastic support part 703 are arranged on the left side of the universal joint connection part 701. Multiple springs of the elastic support part 703 are arranged on the right side of the universal joint connection part 701, one end of each of the above springs is connected to the posture adjustment plate 1, and the other end is connected to the connecting plate 6, which is used to connect and support the front body and the rear body when they rotate relative to each other, and to increase the movement stability of the front body and the rear body when turning; in this embodiment, the left elastic support part 702 and the right elastic support part 703 each include four springs, one of which is arranged above the universal joint connection part 701, and the other three springs are arranged in a triangular shape below the universal joint connection part 701, so as to expand the connection and support action point.

[0060] A second aspect of the present invention provides an in-pipeline welder, which includes the above-mentioned posture adjustment mechanism for the in-pipeline welder.

[0061] The present invention provides a posture adjustment mechanism for an in-pipeline welder and an in-pipeline welder. A plurality of moving wheel mounting brackets are symmetrically and obliquely arranged on the front end surface of a posture adjustment plate. The rear end of the moving wheel mounting bracket is rotatably connected to the posture adjustment plate. The moving wheels of the plurality of in-pipeline welders are respectively arranged at the front end of each moving wheel mounting bracket. A driving component drives the moving wheel mounting bracket to rotate around the rotating connection end of the moving wheel mounting bracket. The moving wheel mounting bracket drives the moving wheel to move obliquely, so that when the in-pipeline welder passes through a curved pipe section of a pipeline, the plurality of moving wheels can adjust their respective distances relative to the central axis of the in-pipeline welder to ensure that the body posture of the in-pipeline welder remains unchanged, thereby avoiding affecting the position of the welding head and causing a decrease in welding quality.

[0062] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A posture adjustment mechanism for a pipeline welding machine, characterized in that: The posture adjustment mechanism comprises: The posture adjustment plate (1) is arranged in the vertical direction; A plurality of moving wheel mounting brackets (2), the plurality of moving wheel mounting brackets (2) being arranged on the front end surface of the posture adjustment plate (1) in a bilaterally symmetrical and inclined manner, the rear end of the moving wheel mounting bracket (2) being rotatably connected to the posture adjustment plate (1), and the plurality of moving wheels (3) of the in-pipe welding machine being arranged on the front end of each of the moving wheel mounting brackets (2); The driving component (4) is used to drive the moving wheel mounting bracket (2) to rotate around the rotating connection end of the moving wheel mounting bracket (2), so that the moving wheel mounting bracket (2) drives the moving wheel (3) to tilt and move; the driving component (4) comprises a driving part (401) and a telescopic part (402), the telescopic part (402) comprises a first shaft (403), a second shaft (404) and a telescopic rod (405) whose lower end is connected to the moving wheel mounting bracket (2), the first shaft (403) and the second shaft (404) are arranged opposite to each other and fixedly connected, the upper end of the first shaft (403) is connected to the posture adjustment plate (1), the interior of the second shaft (404) is formed with a moving channel, and the telescopic rod (405) is provided with a The movable wheel (407) is disposed in the movable channel and moves up and down along the movable channel under the drive of the driving unit (401), the driving unit (401) comprising a motor (406), a driving wheel and a driven wheel (407), the driving wheel and the motor (406) are drivingly connected and form an external meshing with the driven wheel (407), the interior of the first shaft (403) and the second shaft (404) together form a driven wheel installation cavity, the driven wheel (407) is disposed in the driven wheel installation cavity, the telescopic rod (405) passes through the interior of the driven wheel (407) and forms an internal meshing with the driven wheel (407); the number of the driving components (4) is plural, and the plural driving components (4) are drivingly connected to the plural movable wheel installation brackets (2) in a one-to-one correspondence; A first mounting column (101) extending forward is provided on the front end surface of the posture adjustment plate (1), the upper end of the first shaft (403) is rotatably connected to the first mounting column (101), a second mounting column (201) is provided on the moving wheel mounting bracket (2), and the lower end of the telescopic rod (405) is rotatably connected to the second mounting column (201); A shock absorbing assembly (5) is arranged on the moving wheel mounting bracket (2) and comprises an upper connecting body (501), a lower connecting body (502), a connecting column (503) and an elastic member (504); the upper connecting body (501) is connected to the posture adjustment plate (1); the lower connecting body (502) is connected to the moving wheel mounting bracket (2); the connecting column (503) comprises a rod portion (5031) and a limiting end portion (5032) arranged at the top end of the rod portion (5031); the bottom end of the rod portion (5031) passes through the upper connecting body (501) and forms a threaded connection with the lower connecting body (502); the elastic member (504) is sleeved on the rod portion (5031) and the upper end of the elastic member (504) is connected to the upper connecting body (501); the lower end of the elastic member (504) abuts against the lower connecting body (502).

2. The posture adjustment mechanism for a pipeline welding machine according to claim 1, characterized in that: A third mounting post (102) extending forward is provided on the front end surface of the posture adjustment plate (1); the upper end of the upper connecting body (501) is rotatably connected to the third mounting post (102); and the lower end of the lower connecting body (502) is rotatably connected to the second mounting post (201).

3. The posture adjustment mechanism for a pipeline welding machine according to claim 1, characterized in that: The in-pipe welding machine further comprises a front body and a rear body, the posture adjustment plate (1) is arranged at the rear end of the front body, the front end of the rear body is provided with a connecting plate (6), and the posture adjustment mechanism further comprises a flexible connecting component (7) whose two ends are respectively connected to the posture adjustment plate (1) and the connecting plate (6).

4. The posture adjustment mechanism for a pipeline welding machine according to claim 3, characterized in that: The flexible connection assembly (7) comprises a universal joint connection portion (701), a left elastic support portion (702) and a right elastic support portion (703); the front and rear ends of the universal joint connection portion (701) are respectively located on the vertical center axis of the posture adjustment plate (1) and the connection plate (6); the left elastic support portion (702) and the right elastic support portion (703) are symmetrically arranged on the left and right sides of the universal joint connection portion (701).

5. A pipeline internal welding machine, characterized in that: The in-pipeline welding machine comprises a posture adjustment mechanism for the in-pipeline welding machine according to any one of claims 1-4.

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