A beveling and chamfering machine for welding joints of thick-walled pipes

Abstract

The present invention belongs to the technical field of pipeline processing, and discloses a chamfering and beveling machine for welding welds of thick-walled pipelines, including a supporting mechanism, an installation mechanism, a control mechanism, a beveling mechanism and a fixing mechanism. In the present invention, after the thick pipeline is fixed on the support plate of the sliding frame, the fixing mechanism in a folded state is extended into the interior of the thick pipeline, and then the liquid pump is turned on to inject hydraulic oil into the multi-stage cylinder and the telescopic rod. After that, the thick pipeline is fixed relative to the installation mechanism with the cooperation of the support block and the telescopic rod, so as to prevent the thick pipeline from shaking when the beveling cutter cuts the thick pipeline, resulting in poor bevel shape. At the same time, after the support frame completes the support of the thick pipeline from the inside, the axis of the middle ring automatically coincides with the axis of the thick pipeline, so as to ensure that the moving seat rotates around the axis of the thick pipeline, thereby ensuring the forming effect of the bevel and preventing the bevel from being offset, resulting in the inability to weld.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline processing, in particular to a chamfering and beveling machine for welding joints of thick-walled pipelines. Background Art

[0002] Thick-walled pipes usually refer to pipes with thicker walls. They are used in petroleum, chemical industry, urban construction, etc. Because of their thick walls, they have higher pressure and temperature than ordinary pipes. When welding thick-walled pipes, in order to enhance the connection strength of the pipes after welding and improve the welding quality, it is necessary to groove one end of the pipe to facilitate subsequent welding by welders or automatic welders. In order to ensure that the length of the pipe reaches the designed length after grooved, pipes longer than the required length will be used. Most of the existing thick-walled pipe beveling machines are externally mounted pipe cutting and beveling machines, and their main structure is a circular bracket. After the bracket is sleeved on the outside of the pipe, bolts and other devices are used to make the bracket coaxial with the pipe, and the beveling knife moves around the center of the bracket on the bracket to cut the pipe.

[0003] As the beveling machine cuts the pipe, when the beveling is about to be formed, the part connecting the fixed end and the removal end of the pipe becomes very thin. Because the pipe is a thick-walled pipe, the removal end will tilt outward and fall under the combined effect of the vibration generated by the movement of the cutting end of the beveling machine and gravity. At this time, the part of the pipe bevel end close to the inner wall will be torn, resulting in the need to trim the bevel. Once the tear mark extends to the bevel forming surface or the inner wall of the pipe, it needs to be carefully inspected and repaired after the bevel is formed, which undoubtedly increases the maintenance cost and time. At the same time, if there are defects that are not easy to distinguish with the naked eye, as the welding is completed, defects such as pores and slag inclusions will appear inside the weld, resulting in a decrease in weld strength. At this time, this part will be damaged first under long-term use, resulting in a decrease in the service life of the pipeline. Summary of the invention

[0004] The purpose of the present invention is to provide a thick-walled pipe welding weld chamfering and beveling machine to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a thick-walled pipe welding weld chamfering and beveling machine, comprising a support mechanism and a thick pipe, wherein the thick pipe is fixedly installed in the support mechanism, and further comprising:

[0006] The support mechanism comprises a base, the top surface of the base is fixedly connected with a vertical bracket, and the inner side surface of the vertical bracket is provided with two groups of symmetrical first sliding grooves;

[0007] A mounting mechanism, the mounting mechanism comprising two mounting rings slidably connected in a set of first sliding grooves, and a plurality of first connecting columns and second connecting columns are fixedly connected between the two mounting rings;

[0008] A control mechanism, the control mechanism comprising a first oil tank and a second oil tank fixedly connected to the top surface of the base, the first oil tank and the second oil tank being connected via a liquid pump fixed to the top surface of the base;

[0009] A beveling mechanism, the beveling mechanism comprises a sliding ring and a fixed ring, the fixed ring is fixedly connected to a middle ring on the side facing the sliding ring, a moving seat is installed on the middle ring, a tool holder is slidably installed on the moving seat, a beveling knife is fixedly installed on the tool holder, and the moving seat moves around the center of the middle ring;

[0010] The fixing mechanism comprises a fixing column fixedly sleeved on the center of the mounting ring close to the control mechanism, one end of the fixing column is fixedly connected to a fixing seat, a plurality of sliding seats are slidably connected thereon, and the sliding seat is hinged to a support block through a connecting rod.

[0011] Preferably, the first connecting column and the second connecting column are arranged at intervals on the concentric circumference of the mounting ring, the inner side surface of the first connecting column is provided with a third sliding groove extending to the outer side surface, and the inner side surfaces of the upper and lower second connecting columns are both provided with limiting grooves.

[0012] Preferably, the inner sides of the sliding ring and the fixed ring are fixedly connected with a plurality of centrosymmetric telescopic rods, the telescopic rods on the sliding ring and the fixed ring are staggered with each other, and the input and output ports of the telescopic rods are connected to the second oil tank.

[0013] Preferably, the sliding ring is slidably connected in the third sliding groove, and the distance between the sliding ring and the fixed ring is adjusted according to actual needs.

[0014] Preferably, a plurality of guide columns are fixedly connected to the side of the fixed seat facing the sliding ring, the guide columns penetrate the sliding seat, a spring is sleeved on the guide columns, and the spring is elastically connected to the opposite sides of the two sliding seats and the opposite sides of one of the sliding seats and the fixed seat.

[0015] Preferably, a push block is slidably sleeved on the fixed column, and the push block is fixedly connected to a side of the sliding seat away from the fixed seat.

[0016] Preferably, a plurality of support columns are slidably connected in the limiting groove, and two support columns symmetrically arranged up and down are movably clamped on the outer side surface of the fixing column.

[0017] Preferably, the inner side surface of the mounting ring is fixedly connected with a multi-stage cylinder with its telescopic end facing the fixed seat, the telescopic end of the multi-stage cylinder is fixedly connected to one side of the push block, and the input and output ports of the multi-stage cylinder are connected to the second oil tank.

[0018] Preferably, the length of the pipeline connecting the multi-stage cylinder and the second oil tank is shorter than the length of the pipeline connecting the telescopic rod and the second oil tank.

[0019] Preferably, a symmetrical second slide groove is provided on the top surface of the base, a sliding frame is slidably connected in the second slide groove, and a support plate is slidably connected to the two sliding frames, and the top surface of the support plate is in a concave arc shape.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. In the present invention, through the cooperation of the installation mechanism, the groove mechanism and the fixing mechanism, after the thick pipe is fixed on the support plate of the sliding frame, the fixing mechanism in the folded state is extended into the interior of the thick pipe, and then the liquid pump is turned on to inject hydraulic oil into the multi-stage cylinder and the telescopic rod. Then, the thick pipe is fixed relative to the installation mechanism with the cooperation of the support block and the telescopic rod, so as to prevent the thick pipe from shaking when the groove cutter cuts the thick pipe, resulting in poor groove shape. At the same time, after the support frame completes supporting the thick pipe from the inside, the axis of the middle ring automatically coincides with the axis of the thick pipe, so as to ensure that the moving seat rotates around the axis of the thick pipe, thereby ensuring the forming effect of the groove and preventing the groove from being offset, resulting in welding failure.

[0022] 2. Secondly, by sliding the sliding ring set in the third slide groove, during the installation process, the position of the sliding ring in the third slide groove is controlled according to the length of the removal end, thereby preventing the telescopic rod in the sliding ring from contacting the outer wall of the thick pipe. As the beveling cutter cuts, the thickness of the cut part becomes thinner. At this time, if the position of the telescopic rod in the sliding ring is just between the two support blocks, the removal end will be slightly tilted due to the lever principle, so that the removal end contacts the beveling cutter, thereby damaging the beveling cutter. The beveling cutter will also leave scratches on the beveling of the fixed end, requiring the staff to repair the beveling later.

[0023] 3. Finally, by using pipes of different lengths to connect the multi-stage cylinder and the telescopic rod, as the multi-stage cylinder extends, the support block contacts the inner wall of the thick pipe, and the pressure prevents the multi-stage cylinder from being injected with hydraulic oil. At this time, the hydraulic oil continues to enter the telescopic rod through a longer pipe, so that the contact time between the support block and the telescopic rod and the thick pipe is different, preventing the vibrations generated during the two contacts from mixing and causing the installation mechanism to shake up and down in the first slide groove, reducing the service life of the fixing parts of the fixing mechanism, and also preventing the up and down shaking of the installation mechanism from affecting the fixed column, causing the fixed column to be slightly bent and unable to work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0026] Figure 3This is a schematic diagram of the structure of the present invention after the support mechanism and the control mechanism are removed;

[0027] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 It is a schematic cross-sectional view of the mounting mechanism of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the groove mechanism of the present invention;

[0030] Figure 7 It is a schematic diagram of the fixing mechanism structure of the present invention.

[0031] In the figure: 1. supporting mechanism; 11. base; 12. vertical bracket; 13. first slide; 14. second slide; 15. sliding frame; 16. support plate; 2. mounting mechanism; 21. mounting ring; 22. first connecting column; 23. second connecting column; 24. third slide; 25. limiting groove; 26. multi-stage cylinder; 27. supporting column; 3. control mechanism; 31. first oil tank; 32. liquid pump; 33. second oil tank; 4. groove mechanism; 41. sliding ring; 42. fixed ring; 43. middle ring; 44. telescopic rod; 45. movable seat; 46. knife seat; 47. groove knife; 5. fixing mechanism; 51. fixing column; 52. fixing seat; 53. sliding seat; 54. connecting rod; 55. supporting block; 56. guide column; 57. spring; 58. push block; 6. thick pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 7 As shown, an embodiment of the present invention provides a thick-walled pipe welding weld chamfering and beveling machine, comprising a support mechanism 1 and a thick pipe 6, wherein the thick pipe 6 is fixedly installed in the support mechanism 1, and further comprising:

[0034] The support mechanism 1 comprises a base 11, a vertical bracket 12 is fixedly connected to the top surface of the base 11, and two groups of symmetrical first sliding grooves 13 are formed on the inner side surface of the vertical bracket 12;

[0035] The mounting mechanism 2 includes two mounting rings 21 slidably connected in a set of first slide grooves 13, and a plurality of first connecting columns 22 and second connecting columns 23 are fixedly connected between the two mounting rings 21;

[0036] The control mechanism 3 includes a first oil tank 31 and a second oil tank 33 fixedly connected to the top surface of the base 11, and the first oil tank 31 and the second oil tank 33 are connected via a liquid pump 32 fixed to the top surface of the base 11;

[0037] The beveling mechanism 4 includes a sliding ring 41 and a fixed ring 42. The fixed ring 42 is fixedly connected to a middle ring 43 on the side of the sliding ring 41. A moving seat 45 is installed on the middle ring 43. A knife seat 46 is slidably installed on the moving seat 45. A beveling knife 47 is fixedly installed on the knife seat 46. The moving seat 45 moves around the center of the middle ring 43.

[0038] The fixing mechanism 5 includes a fixing column 51 fixedly sleeved on the center of the mounting ring 21 close to the control mechanism 3, one end of the fixing column 51 is fixedly connected to a fixing seat 52, on which a plurality of sliding seats 53 are slidably connected, and the sliding seat 53 is hinged to a support block 55 through a connecting rod 54.

[0039] In the present invention, by the cooperation of the installation mechanism 2, the groove mechanism 4 and the fixing mechanism 5, after the thick pipe 6 is fixed on the support plate 16 of the sliding frame 15, the fixing mechanism 5 in the folded state is extended into the interior of the thick pipe 6, and then the liquid pump 32 is turned on to inject hydraulic oil into the multi-stage cylinder 26 and the telescopic rod 44. Then, with the cooperation of the support block 55 and the telescopic rod 44, the thick pipe 6 is fixed relative to the installation mechanism 2, thereby preventing the thick pipe 6 from shaking when the groove cutter 47 cuts the thick pipe 6, resulting in a poor groove shape. At the same time, after the support block 55 completes the support of the thick pipe 6 from the inside, the axis of the middle ring 43 automatically coincides with the axis of the thick pipe 6, thereby ensuring that the movable seat 45 rotates around the axis of the thick pipe 6, thereby ensuring the forming effect of the groove and preventing the groove from being offset, resulting in the inability to weld.

[0040] Secondly, by sliding the sliding ring 41 set in the third slide groove 24, during the installation process, the position of the sliding ring 41 in the third slide groove 24 is controlled according to the length of the removal end, thereby preventing the telescopic rod 44 in the sliding ring 41 from contacting the outer wall of the thick pipe 6. As the beveling cutter 47 cuts, the thickness of the cut part becomes thinner. At this time, if the position of the telescopic rod 44 in the sliding ring 41 is just between the two support blocks 55, the removal end will be slightly tilted due to the lever principle, so that the removal end will contact the beveling cutter 47, thereby damaging the beveling cutter 47. The beveling cutter 47 will also leave scratches on the bevel of the fixed end, requiring the staff to repair the bevel later.

[0041] Finally, by using pipes of different lengths to connect the multi-stage cylinder 26 and the telescopic rod 44, as the multi-stage cylinder 26 is extended, after the support block 55 contacts the inner wall of the thick pipe 6, the pressure prevents the multi-stage cylinder 26 from being further injected with hydraulic oil. At this time, the hydraulic oil continues to enter the telescopic rod 44 through a longer pipe, so that the contact time between the support block 55 and the telescopic rod 44 and the thick pipe 6 is different, thereby preventing the vibrations generated during the two contacts from mixing and causing the installation mechanism 2 to shake up and down in the first slide groove 13, thereby reducing the service life of the fixing parts of the installation mechanism 2. At the same time, it also prevents the up and down shaking of the installation mechanism 2 from affecting the fixing column 51, causing the fixing column 51 to be slightly bent and unable to work normally.

[0042] Among them, the first connecting column 22 and the second connecting column 23 are arranged at intervals on the concentric circle of the mounting ring 21, the inner side surface of the first connecting column 22 is provided with a third slide groove 24 that penetrates to the outer side surface, and the inner sides of the upper and lower second connecting columns 23 are provided with limiting grooves 25, and the inner sides of the sliding ring 41 and the fixed ring 42 are fixedly connected with a plurality of centrally symmetrical telescopic rods 44, the telescopic rods 44 on the sliding ring 41 and the fixed ring 42 are staggered with each other, the input and output ports of the telescopic rods 44 are connected to the second oil tank 33, the sliding ring 41 is slidably connected in the third slide groove 24, and the distance between it and the fixed ring 42 is adjusted according to actual needs.

[0043] like Figures 3 to 6 As shown, when the telescopic rod 44 is extended, the thick pipe 6 is clamped. At this time, with the synchronous extension of the telescopic rods 44 on both sides and the limitation of the mounting mechanism 2, the axis of the middle ring 43 will coincide with the axis of the thick pipe 6, so that the tool holder 46 of the beveling mechanism 4 is kept vertical to the outer wall of the thick pipe 6, thereby ensuring that the actual beveling angle of the beveling cutter 47 after turning is the same as the designed angle; when the telescopic rod 44 on the sliding ring 41 is used to fix the removal end, the position of the sliding ring 41 is adjusted according to the actual length of the removal end to ensure that no shaking occurs when the removal end is about to be separated from the fixed end, thereby preventing poor beveling forming effect.

[0044] Among them, the fixed seat 52 is fixedly connected with a plurality of guide columns 56 on the side facing the sliding ring 41, the guide columns 56 penetrate the sliding seat 53, and a spring 57 is sleeved on the guide column 56. The spring 57 is elastically connected to the opposite sides of the two sliding seats 53 and the opposite sides of one of the sliding seats 53 and the fixed seat 52. A push block 58 is slidably sleeved on the fixed column 51, and the push block 58 is fixedly connected to a side of the sliding seat 53 away from the fixed seat 52. A plurality of support columns 27 are slidably connected in the limiting groove 25, and two support columns 27 symmetrically arranged above and below are movably clamped on the outer side surface of the fixed column 51.

[0045] like Figures 1 to 4 and Figure 7As shown, as the multi-stage cylinder 26 is driven to extend, the telescopic end of the multi-stage cylinder 26 pushes the push block 58 to move forward. At this time, under the push of the push block 58 and the action of the spring 57, the two sliding seats 53 move toward the fixed seat 52, and then the connecting rod 54 drives the support block 55 to move toward the inner wall of the thick pipe 6. After the support block 55 abuts against the inner wall of the thick pipe 6, the multiple support blocks 55 cooperate to make the axis of the thick pipe 6 coincide with the axis of the fixed column 51, so that when the groove is subsequently turned, the groove and the thick pipe 6 remain concentric. , to prevent the problem of misalignment of the welded thick pipe 6 caused by irregular grooves; at the same time, because the two groups of support blocks 55 are located on both sides of the groove cutter 47, as the groove cutter 47 cuts the thick pipe 6, when the wall thickness of the cut part is too thin to connect to the removal end, the internal support block 55 still supports the removal end to prevent the removal end from tilting and falling and tearing the groove. At the same time, fixing the removal end also ensures the stability of the removal end when it is separated and cut in the final stage of the groove, thereby ensuring the forming effect of the groove.

[0046] Among them, the inner side surface of the mounting ring 21 is fixedly connected with a multi-stage cylinder 26 with the telescopic end facing the fixed seat 52, the telescopic end of the multi-stage cylinder 26 is fixedly connected to one side of the push block 58, the input and output ports of the multi-stage cylinder 26 are connected to the second oil tank 33, and the length of the pipe connecting the multi-stage cylinder 26 and the second oil tank 33 is shorter than the length of the pipe connecting the telescopic rod 44 and the second oil tank 33.

[0047] like Figures 2 to 7 As shown, when the liquid pump 32 pumps hydraulic oil into the second oil tank 33, as the second oil tank 33 is filled, excess hydraulic oil enters the multi-stage cylinder 26 and the telescopic rod 44. Because the connecting pipe of the multi-stage cylinder 26 is shorter, when the multi-stage cylinder 26 is completely extended, the fixing mechanism 5 is opened to fix the thick pipe 6 from the inside, thereby preventing the thick pipe 6 from rotating. As the hydraulic oil continues to be pumped in, the telescopic end of the telescopic rod 44 abuts against the outer side of the thick pipe 6. At this time, under the push of the telescopic rods 44 located on both sides of the middle ring 43, the axis of the mounting mechanism 2 and the middle ring 43 coincides with the axis of the thick pipe 6, thereby ensuring that the beveling cutter 47 has the same cutting depth when cutting the pipe, thereby ensuring the accuracy of the beveling angle.

[0048] A symmetrical second slide groove 14 is provided on the top surface of the base 11 , a sliding frame 15 is slidably connected in the second slide groove 14 , and a support plate 16 is slidably connected to the two sliding frames 15 , and the top surface of the support plate 16 is in a concave arc shape.

[0049] like Figure 1 and Figure 2As shown, when the thick pipe 6 starts to be installed, the sliding frame 15 is controlled to move away from the vertical bracket 12. After the thick pipe 6 is hoisted onto the support plate 16, as the thick pipe 6 stops shaking on the support plate 16, the axis of the thick pipe 6 and the axis of the fixing mechanism 5 are in the same vertical plane. Then, the height of the support plate 16 and the distance between the sliding frame 15 and the vertical bracket 12 are adjusted to make the axis of the thick pipe 6 coincide with the axis of the fixing mechanism 5, ensuring that the thick pipe 6 does not shake left and right after the fixing mechanism 5 is opened, preventing the fixing column 51 from bending and causing damage to the fixing mechanism 5.

[0050] Working principle:

[0051] After the thick pipe 6 is hoisted onto the support plate 16, as the thick pipe 6 stops shaking, the thick pipe 6 is in the middle of the support plate 16, and then the thick pipe 6 and the support plate 16 are fixed, and then the height of the support plate 16 on the sliding frame 15 is adjusted according to the actual data, and then the height of the installation mechanism 2 is synchronously adjusted, so that the axis of the fixing column 51 of the fixing mechanism 5 is in line with the axis of the thick pipe 6, and then the sliding frame 15 is controlled to move in the direction of the installation mechanism 2, so that the fixing mechanism 5 is inserted into the thick pipe 6, and then the liquid pump of the control mechanism 3 is turned on. 32, so that the liquid pump 32 injects the hydraulic oil from the first oil tank 31 into the second oil tank 33. At this time, the hydraulic oil in the second oil tank 33 will enter the multi-stage cylinder 26 and the telescopic rod 44 through the pipeline. After the multi-stage cylinder 26 is extended, the support block 55 abuts against the inner wall of the thick pipe 6. As the liquid pump 32 continues to work, the extended end of the telescopic rod 44 abuts against the outer wall of the thick pipe 6, thereby fixing the thick pipe 6. Then, the working motor of the moving seat 45 is turned on to make the moving seat 45 rotate around the thick pipe 6, thereby cutting the thick pipe 6.

[0052] As the cutting proceeds, the removal end is fixed by a set of support blocks 55 and the telescopic rod 44 in the sliding ring 41, thereby preventing the removal end from falling after the remaining wall thickness cannot support the removal end, causing the cutting part to tear.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thick-walled pipe welding weld chamfering machine, comprising a support mechanism (1) and a thick pipe (6), wherein the thick pipe (6) is fixedly installed in the support mechanism (1), characterized in that: Also includes: The support mechanism (1) comprises a base (11), the top surface of the base (11) is fixedly connected to a vertical bracket (12), and the inner side surface of the vertical bracket (12) is provided with two groups of symmetrical first sliding grooves (13); A mounting mechanism (2), the mounting mechanism (2) comprising two mounting rings (21) slidably connected in a set of first sliding grooves (13), a plurality of first connecting columns (22) and second connecting columns (23) being fixedly connected between the two mounting rings (21); A control mechanism (3), the control mechanism (3) comprising a first oil tank (31) and a second oil tank (33) fixedly connected to the top surface of the base (11), the first oil tank (31) and the second oil tank (33) being connected via a liquid pump (32) fixed to the top surface of the base (11); A beveling mechanism (4), the beveling mechanism (4) comprising a sliding ring (41) and a fixed ring (42), the fixed ring (42) being fixedly connected to a middle ring (43) on a side facing the sliding ring (41), the middle ring (43) being mounted with a moving seat (45), the moving seat (45) being slidably mounted with a knife seat (46), the knife seat (46) being fixedly mounted with a beveling knife (47), the moving seat (45) moving around the center of the middle ring (43); A fixing mechanism (5), the fixing mechanism (5) comprising a fixing column (51) fixedly sleeved on the center of a mounting ring (21) close to the control mechanism (3), one end of the fixing column (51) being fixedly connected to a fixing seat (52), a plurality of sliding seats (53) being slidably connected thereto, the sliding seats (53) being hingedly connected to a support block (55) via a connecting rod (54).

2. A thick-walled pipe welding weld chamfering machine according to claim 1, characterized in that: The first connecting column (22) and the second connecting column (23) are arranged at intervals on a concentric circle with the mounting ring (21); the inner side surface of the first connecting column (22) is provided with a third sliding groove (24) extending to the outer side surface; and the inner side surfaces of the upper and lower second connecting columns (23) are both provided with limiting grooves (25).

3. A thick-walled pipe welding weld chamfering machine according to claim 2, characterized in that: A plurality of centrally symmetrical telescopic rods (44) are fixedly connected to the inner side surfaces of the sliding ring (41) and the fixed ring (42); the telescopic rods (44) on the sliding ring (41) and the fixed ring (42) are staggered with each other; and the input and output ports of the telescopic rods (44) are connected to the second oil tank (33).

4. A thick-walled pipe welding weld chamfering machine according to claim 3, characterized in that: The sliding ring (41) is slidably connected in the third sliding groove (24), and the distance between the sliding ring (41) and the fixed ring (42) is adjusted according to actual needs.

5. A thick-walled pipe welding weld chamfering and beveling machine according to claim 4, characterized in that: A plurality of guide columns (56) are fixedly connected to the side of the fixed seat (52) facing the sliding ring (41), the guide columns (56) passing through the sliding seat (53), and springs (57) are sleeved on the guide columns (56). The springs (57) are elastically connected to the opposite sides of the two sliding seats (53) and the opposite sides of one of the sliding seats (53) and the fixed seat (52).

6. A thick-walled pipe welding weld chamfering and beveling machine according to claim 5, characterized in that: A push block (58) is slidably sleeved on the fixed column (51), and the push block (58) is fixedly connected to a side of the sliding seat (53) away from the fixed seat (52).

7. A thick-walled pipe welding weld chamfering and beveling machine according to claim 6, characterized in that: A plurality of support columns (27) are slidably connected in the limiting groove (25), and two support columns (27) symmetrically disposed up and down are movably clamped on the outer side surface of the fixing column (51).

8. The thick-walled pipe welding weld chamfering and beveling machine according to claim 7, characterized in that: A multi-stage cylinder (26) with a telescopic end facing the fixed seat (52) is fixedly connected to the inner side surface of the mounting ring (21), the telescopic end of the multi-stage cylinder (26) is fixedly connected to one side of the push block (58), and the input and output ports of the multi-stage cylinder (26) are connected to the second oil tank (33).

9. A thick-walled pipe welding weld chamfering and beveling machine according to claim 8, characterized in that: The length of the pipeline connecting the multi-stage cylinder (26) and the second oil tank (33) is shorter than the length of the pipeline connecting the telescopic rod (44) and the second oil tank (33).

10. A thick-walled pipe welding weld chamfering and beveling machine according to claim 9, characterized in that: A symmetrical second slide groove (14) is provided on the top surface of the base (11), a slide frame (15) is slidably connected in the second slide groove (14), and a support plate (16) is slidably connected to the two slide frames (15), and the top surface of the support plate (16) is in a concave arc shape.

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