Steel pipe internal grinding machine capable of adapting to multi-angle grinding of steel pipe

Abstract

The steel pipe internal grinding machine comprises a clamping and fixing structure, an adjusting and grinding structure is fixedly installed on the clamping and fixing structure, and the clamping and fixing structure comprises a straight pipe fixing assembly for fixedly installing a bent pipe assembly. The straight pipe fixing assembly comprises a mounting base with a connecting groove in the bottom, a concave frame box with a hollow structure inside is fixedly mounted above the mounting base, through grooves facilitating fixed mounting of the pipe bending assembly are formed in the two sides of the concave frame box in a penetrating mode, and an adjusting air cylinder with one end extending to the inner side of the concave frame box is fixed to the upper portion in the concave frame box. And meanwhile, an arc-shaped clamping plate is fixedly installed at the output end of the adjusting air cylinder, the pipe bending assembly comprises an opening frame with a guide sliding groove formed in the inner side, and multiple sections of adjusting air cylinders are fixedly installed at one end of the opening frame.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe internal grinding machines, in particular to an internal grinding machine for steel pipes which can be adapted to multi-angle grinding of steel pipes. Background Art

[0002] During the processing of seamless steel pipes, due to various factors, many defects such as scratches, burrs or impurities will appear on the inner wall, which will affect the use effect of the steel pipe. Therefore, the inner wall of the steel pipe needs to be polished. After searching, it was found that the publication number of the existing public technology is: CN211760292U, an internal grinding machine for steel pipes, including a workbench, a moving trolley is provided on one side of the workbench, and a grinding mechanism is provided on the moving trolley. A driving mechanism for driving it to reciprocate toward the workbench is installed at the bottom of the moving trolley; an installation groove is provided on the workbench, a lower clamping plate is slidably arranged in the installation groove, a lifting mechanism is provided under the lower clamping plate, and an upper clamping plate is slidably installed above the upper plate; the upper clamping plate can cooperate with the lower clamping plate to clamp and fix the steel pipe under the action of the telescopic spring; when grinding steel pipes of different diameters, the lower clamping plate can be driven to rise or fall by the lifting mechanism, thereby ensuring that the steel pipe is always coaxially arranged with the grinding rod, thereby ensuring the grinding quality.

[0003] In summary: although the steel pipe internal grinder provided in the above scheme solves the problem of grinding and fixing the steel pipe, the steel pipe internal grinder provided in the above scheme can only grind the inner wall of the straight pipe, but cannot grind the inner wall of the curved pipe. Summary of the invention

[0004] The purpose of the present invention is to address the shortcomings of the prior art and provide a steel pipe internal grinder that can adapt to multi-angle grinding of steel pipes, so as to solve the problem that the steel pipe internal grinder set in the above-mentioned scheme proposed in the above-mentioned background technology can only grind the inner wall of the straight pipe, but cannot grind the inner wall of the curved pipe.

[0005] To achieve the above object, the present invention provides the following technical solutions: an internal grinding machine for steel pipes that can adapt to multi-angle grinding of steel pipes, comprising a clamping and fixing structure, on which an adjusting and grinding structure is fixedly installed;

[0006] The clamping and fixing structure includes a straight pipe fixing assembly fixedly installed on the bent pipe assembly, and the straight pipe fixing assembly includes a mounting seat with a connecting groove at the bottom, and a concave frame box with a hollow structure inside is fixedly installed above the mounting seat;

[0007] Through grooves are provided on both sides of the concave frame box for convenient fixing and installation of the bent pipe assembly, and an adjusting cylinder with one end extending inside the concave frame box is fixed on the upper part of the concave frame box, and an arc-shaped clamping plate is fixedly installed on the output end of the adjusting cylinder.

[0008] By adopting the above technical solution, the provided mounting seat can achieve fixed installation and installation support.

[0009] Preferably, the bending pipe assembly includes an opening frame with a guide groove on the inner side, and a multi-section adjusting cylinder is fixedly installed on one end of the opening frame. At the same time, the inside of the opening frame is slidingly connected to the concave plate through the guide groove and the sliding strip, and one side of the concave plate is fixedly connected to the output end of the multi-section adjusting cylinder.

[0010] By adopting the above technical solution, the opening frame is provided to achieve fixation and inner opening.

[0011] Preferably, an electromagnetic guide rail is fixed on the concave plate, and a card slot matching with the card block is opened at one end of the electromagnetic guide rail. At the same time, the upper part of the electromagnetic guide rail is connected to the adjustment seat by sliding adsorption through an adsorption guide block, and the adsorption guide block is fixedly installed under the adjustment seat through a fixed groove.

[0012] By adopting the above technical solution, the sliding adjustment is promoted by the arranged concave strips.

[0013] Preferably, a bidirectional electric guide rail group is also fixedly installed above the adjustment seat through a fixing groove, and a template group is fixedly installed above the bidirectional electric guide rail group. At the same time, concave block plates are fixed on both sides of the template group. The template group directly clamps and fixes the bent pipe through a fixing nut group and a concave block plate.

[0014] By adopting the above technical solution, the recessed block plate is provided to achieve snap-fit ​​installation.

[0015] Preferably, the adjusting and grinding structure includes an adjusting component fixedly installed on the grinding component, and the adjusting component includes a concave column fixed above the concave frame box, and a sliding column is installed inside the concave column. One side of the sliding column is fixedly connected to the control cylinder, and the driving motor is fixedly installed above the sliding column through a fixed connecting plate.

[0016] By adopting the above technical solution, the sliding supporting installation is achieved through the provision of the concave column.

[0017] Preferably, the grinding assembly includes a pendulum chain with a connecting threaded hole above the surface, and a spline shaft is fixedly installed at the bottom of the pendulum chain. At the same time, the spline shaft is matched with the flexible corrugated cover through a spline sleeve. A through-hole plate is fixed above the flexible corrugated cover, and the through-hole plate is fixed to the top of the pendulum chain through a fixing nut and a connecting threaded hole.

[0018] By adopting the above technical solution, the swing chain is provided to adjust the rotation angle.

[0019] Preferably, the flexible corrugated cover includes a mounting plate with a fixing hole on its surface, and a spring rod is fixed inside the mounting plate through the fixing hole. At the same time, one end of the spring rod is provided with an external thread for convenient threaded connection with a grinding plate, and another connecting threaded hole is also provided at the bottom of the grinding plate.

[0020] By adopting the above technical solution, the spring rod is arranged to achieve elastic adjustment of the force.

[0021] Preferably, two groups of electromagnetic guide rails are provided, and a single group of electromagnetic guide rails is symmetrically fixed about a single concave strip plate.

[0022] By adopting the above technical solution, the electromagnetic guide rail is provided to achieve installation connection.

[0023] Preferably, the mounting plates are fixed at equal distances, and spring rods are fixedly mounted in an annular array on the surface of a single mounting plate.

[0024] By adopting the above technical solution, the provided installation plate can achieve through-fitting and surface fixed installation.

[0025] Compared with the prior art, the invention has the following beneficial effects: the steel pipe internal grinding machine which can adapt to multi-angle grinding of steel pipes,

[0026] (1) In this case, by adjusting the grinding assembly set in the grinding structure, the problem that the steel pipe internal grinder set in the above scheme can only grind the inner wall of the straight pipe, but cannot grind the inner wall of the curved pipe is solved. When the inner wall of the straight pipe or the curved pipe needs to be polished, the operator places the flexible corrugated cover and the mounting plate inside the straight pipe or the curved pipe. At this time, the swing chain is forced to rotate and drive the flexible corrugated cover and the mounting plate to rotate synchronously. When the flexible corrugated cover and the mounting plate are forced to move downward, when the straight pipe is used, the movement trajectory of the flexible corrugated cover and the mounting plate is vertically downward. When the curved pipe is used, the flexible corrugated cover and the mounting plate are rotated by the swing chain. When the swing chain is forced to adjust the angle, the flexible corrugated cover and the mounting plate are driven to adjust the angle synchronously to grind the inner wall of the curved pipe with different angles.

[0027] (2) By adjusting the adjustment component set in the grinding structure, the problem that the driving motor cannot be raised and lowered, resulting in the inability to adapt to the inner wall grinding of straight pipes of different lengths, is solved. When the inner wall of straight pipes of different lengths needs to be ground, the operator drives the control cylinder to drive the sliding column to move. When the sliding column moves under force, it drives the driving motor to move synchronously. When the lifting interval distance of the driving motor is changed, it is not only convenient to grind the inner wall of straight pipes of different lengths, but also convenient to grind the inner wall of curved pipes of different heights;

[0028] (3) By setting a straight pipe fixing assembly in the clamping and fixing structure, the problem that the outer wall of the straight pipe cannot be clamped and fixed when the inner wall of the straight pipe needs to be polished is solved. When the straight pipe needs to be polished, the straight pipe is vertically erected through the mounting seat and the concave frame box and the inner side of the concave frame box and the mounting seat. At this time, the control and adjustment cylinder works to make the arc clamping plate clamp and fix the straight pipe, and the waste chips generated during the grinding process when the straight pipe is vertically clamped can all fall under the straight pipe for subsequent collection;

[0029] (4) The bending pipe assembly is provided in the clamping and fixing structure to solve the problem that the bending pipe cannot be clamped, adjusted and polished. When the inner wall of the bending pipe needs to be polished, the operator uses the template group to clamp and fix the two sides of the bending pipe, and uses the connecting pin or the fixing nut group to limit the connection of the concave block plate. At this time, the multi-section adjustment cylinder is controlled to work. During the operation of the multi-section adjustment cylinder, the electromagnetic guide rail on the concave strip plate is pushed to dock. At this time, the operator pushes the adjustment seat to push the bending pipe directly under the flexible corrugated cover. The electromagnetic guide rail adsorbs and fixes the adjustment seat, thereby facilitating the inner wall polishing of the bending pipe;

[0030] (5) The concave strips provided in the bending pipe assembly can effectively clamp and fix the lower part of the straight pipe. The concave strips can be used to clamp and fix the lower part of the straight pipe, which not only improves the stability of the straight pipe during the clamping process, but also prevents the lower part of the straight pipe from swinging or shaking during the grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the clamping and fixing structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the mounting seat, the connecting groove, the concave frame box, the adjusting cylinder and the arc-shaped clamping plate of the present invention;

[0034] Figure 4 This is a schematic diagram of the concave frame box and the through slot structure of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the opening frame, multi-section regulating cylinder, electromagnetic guide rail, regulating seat, bidirectional electric guide rail group, template group and concave block plate of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the opening frame, the guide slide groove and the multi-section regulating cylinder of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the slide bar, the concave strip plate, the electromagnetic guide rail, the card block and the card slot of the present invention;

[0038] Figure 8It is a schematic diagram of the structure of the adsorption guide block, the adjustment seat and the bidirectional electric guide rail assembly of the present invention;

[0039] Fig. 9 This is a schematic diagram of the adjustment and polishing structure of the present invention;

[0040] Fig.10 This is a schematic diagram of the structure of the concave column, the regulating cylinder and the driving motor of the present invention;

[0041] Fig.11 It is a schematic diagram of the local structure of the concave column and the sliding column of the present invention;

[0042] Fig.12 It is a schematic diagram of the structure of the pendulum chain, spline shaft, spline sleeve, flexible corrugated cover, through-hole plate, mounting plate and polishing plate of the present invention;

[0043] Fig.13 It is a schematic diagram of the local structure of the mounting plate, spring rod and grinding plate of the present invention.

[0044] In the figure: 1. Clamping and fixing structure; 101. Straight pipe fixing assembly; 1011. Mounting seat; 1012. Connecting groove; 1013. Concave frame box; 1014. Through groove; 1015. Adjusting cylinder; 1016. Arc clamping plate; 102. Bend pipe assembly; 1021. Opening frame; 1022. Guide slide; 1023. Multi-section adjusting cylinder; 1024. Slide; 1025. Concave strip plate; 1026. Electromagnetic guide rail; 1027. Block; 1028. Slot; 1029. Adsorption guide block; 1021 0. Adjustment seat; 10211. Bidirectional electric guide rail group; 10212. Template group; 10213. Concave block plate; 2. Adjustment and grinding structure; 201. Adjustment assembly; 2011. Concave column; 2012. Sliding column; 2013. Control cylinder; 2014. Drive motor; 202. Grinding assembly; 2021. Pendulum chain; 2022. Spline shaft; 2023. Spline sleeve; 2024. Flexible corrugated cover; 2025. Through-hole plate; 2026. Mounting plate; 2027. Spring rod; 2028. Grinding plate. DETAILED DESCRIPTION

[0045] 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.

[0046] See also Figure 1-13 The present invention provides a technical solution: a steel pipe internal grinding machine that can adapt to multi-angle grinding of steel pipes, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a clamping and fixing structure 1, which includes a straight pipe fixing component 101 fixedly installed on the bent pipe component 102, and the straight pipe fixing component 101 includes a mounting seat 1011 with a connecting groove 1012 at the bottom, and a concave frame box 1013 with a hollow structure inside is fixedly installed above the mounting seat 1011, and through grooves 1014 are opened on both sides of the concave frame box 1013 to facilitate the fixed installation of the bent pipe component 102, and one end extending from the concave frame box 101 is fixed on the top of the concave frame box 1013. 3, and an arc-shaped clamping plate 1016 is fixedly installed on the output end of the adjusting cylinder 1015, wherein the above-mentioned parts constitute a synchronous drive clamping structure, and when the synchronous drive clamping structure constituted by the above-mentioned parts is used, the upper end of the straight pipe is effectively clamped and fixed, and the overall structure of the mounting seat 1011 and the concave frame box 1013 in the top view is a concave block structure, and when the overall structure of the above-mentioned parts in the top view is a concave block structure, it is effective to facilitate the vertical clamping, fixing and grinding processing of the straight pipe.

[0047] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the bending pipe assembly 102 includes an opening frame 1021 with a guide groove 1022 on the inner side, and a multi-section adjusting cylinder 1023 is fixedly installed at one end of the opening frame 1021. At the same time, the interior of the opening frame 1021 is slidingly connected to the concave plate 1025 through the guide groove 1022 and the slide bar 1024, and one side of the concave plate 1025 is fixedly connected to the output end of the multi-section adjusting cylinder 1023. The above-mentioned components are all fixedly installed in a symmetrical manner, and when the above-mentioned components are fixedly installed in a symmetrical manner, the symmetrical concave plates 1025 can be effectively and conveniently adjusted relative to each other in a synchronous manner.

[0048] In the above scheme, an electromagnetic guide rail 1026 is fixed on the concave strip plate 1025, and two groups of electromagnetic guide rails 1026 are provided, and a single group of electromagnetic guide rails 1026 is symmetrically fixed about a single concave strip plate 1025. When the above components are provided with two groups of four, this not only reflects the symmetry of the installation and setting of the above components, but also reflects the opening and inlay fixation of one end of the above components. When the above components are provided with two groups of four, the practicality and guide sliding adjustability of the installation and setting of the above components are reflected at the same time. When 4 roots are assembled, the control adjustment limit adsorption of the above-mentioned components is reflected, and a card slot 1028 which is matched with the card block 1027 is opened at one end of the electromagnetic guide rail 1026. At the same time, the upper part of the electromagnetic guide rail 1026 is connected to the adjustment seat 10210 by sliding adsorption through an adsorption guide block 1029, and the adsorption guide block 1029 is fixedly installed under the adjustment seat 10210 through a fixed groove. Among them, the above-mentioned components constitute a sliding matching engagement structure, and the sliding matching structure constituted by the above-mentioned components is effectively facilitated The sliding matching docking between the electromagnetic guide rails 1026.

[0049] Furthermore, in the above scheme, a bidirectional electric guide rail group 10211 is also fixedly installed on the top of the adjustment seat 10210 through a fixing groove, and a template group 10212 is fixedly installed on the top of the bidirectional electric guide rail group 10211, and recessed blocks 10213 are fixed on both sides of the template group 10212. The template group 10212 directly clamps and fixes the bent pipe through the fixing nut group and the recessed blocks 10213, wherein one template group 10212 is provided, and a "universal sleeve structure" as in the prior art is fixedly installed on the inner side of the template group 10212. When the "universal sleeve structure" in the prior art is utilized, it can effectively achieve an elastic fitting, clamping and fixing effect on bent pipes of different shapes.

[0050] like Fig. 9 , Fig.10 and Fig.11 As shown, an adjusting and grinding structure 2 is fixedly installed on the clamping and fixing structure 1, and the adjusting and grinding structure 2 includes an adjusting component 201 fixedly installed on the grinding component 202, and the adjusting component 201 includes a concave column 2011 fixed above the concave frame box 1013, and a sliding column 2012 is installed inside the concave column 2011, one side of the sliding column 2012 is fixedly connected to the control cylinder 2013, and the driving motor 2014 is fixedly installed above the sliding column 2012 through a fixed connecting plate, wherein the above-mentioned components constitute a lifting and lowering adjustment structure, and the lifting and lowering interval distance of the driving motor 2014 is effectively changed by utilizing the lifting and lowering adjustment structure constituted by the above-mentioned components, and the lifting and lowering interval distance of the driving motor 2014 is changed to adapt to the clamping and fixing of straight pipes of different lengths.

[0051] like Fig.12 and Fig.13As shown, the grinding assembly 202 includes a pendulum chain 2021 with connecting threaded holes on the surface, and a spline shaft 2022 is fixedly installed on the bottom of the pendulum chain 2021, and the spline shaft 2022 is matched with the flexible corrugated cover 2024 through a spline sleeve 2023, and a through-hole plate 2025 is fixed on the top of the flexible corrugated cover 2024, and the through-hole plate 2025 is fixed to the top of the pendulum chain 2021 through a fixing nut and a connecting threaded hole, wherein the above-mentioned components constitute a matching installation structure, and the matching installation structure constituted by the above-mentioned components is effectively facilitated The rapid installation and disassembly effect between the flexible corrugated cover 2024 and the pendulum chain 2021, and the subsequent disassembly, repair and maintenance of the flexible corrugated cover 2024 is facilitated by the rapid installation and disassembly of the above-mentioned two.

[0052] In the above scheme, the flexible corrugated cover 2024 includes a mounting plate 2026 with fixing holes on the surface, the mounting plate 2026 is fixed at an equal distance, and a spring rod 2027 is fixedly installed in an annular array on the surface of a single mounting plate 2026. When the above components are fixed at an equal distance, it not only reflects the aesthetics of the equal distance installation of the above components, but also reflects the practicality and equal distance distribution of the equal distance installation and fixation of the above components. In addition, when the spring rod 2027 is fixedly installed in an annular array on the surface of a single mounting plate 2026, it is effectively convenient for multiple grinding plates 28 to be fixed. The equidistantly distributed fixed installation is performed by using the above-mentioned components to effectively grind the inner walls of pipes with different diameters, and a spring rod 2027 is fixed inside the mounting plate 2026 through a fixing hole, and at the same time, an external thread is provided at one end of the spring rod 2027 for convenient threaded connection with a grinding plate 2028, and another connecting threaded hole is also provided at the bottom of the grinding plate 2028, wherein the above-mentioned components constitute an elastic adjustment structure, and when the elastic adjustment structure constituted by the above-mentioned components is used, the inner walls of pipes with different diameters can be effectively and conveniently automatically adjusted and fitted for grinding.

[0053] In the above scheme, when the inner wall of the straight pipe needs to be polished, the operator first drives the control cylinder 2013 to work. During the operation of the control cylinder 2013, the sliding column 2012 and the driving motor 2014 are driven to move synchronously. When the driving motor 2014 moves synchronously, the swing chain 2021 and the flexible corrugated cover 2024 are driven to rise and fall synchronously. When the flexible corrugated cover 2024 is adjusted to the corresponding height, the driving control cylinder 2013 stops working. At this time, the operator puts the pipe upright close to the mounting seat 1011 and the concave frame box 1013, and then controls the adjusting cylinder 1015 to work. The adjusting cylinder 1 015 During the working process, after the arc clamping plate 1016 clamps and fixes one end of the straight pipe, the operator controls the multi-section regulating cylinder 1023 to work again. During the working process of the multi-section regulating cylinder 1023, the concave strip plate 1025 is driven to slide under force. When the concave strip plate 1025 is slid under force, it drives the electromagnetic guide rail 1026 to dock and match, thereby clamping and fixing the bottom of the straight pipe. After the straight pipe is clamped and fixed, the operator manually places the flexible corrugated cover 2024, the mounting plate 2026 and the grinding plate 2028 inside the straight pipe, thereby driving the control cylinder 2013 to reverse. When the working and driving motor 2014 is in operation, it drives the flexible corrugated cover 2024, the mounting plate 2026 and the grinding plate 2028 to rotate downward step by step, so as to grind the inner wall of the straight pipe. When the inner wall of the bent pipe needs to be polished, the operator manually places the bent pipe between the template group 10212 and controls the two-way electric guide rail group 10211 to move. During the operation of the two-way electric guide rail group 10211, it drives the template group 10212 to fit and clamp the bent pipe, and then uses the connecting pin or the fixing nut group to engage with the concave block plate 10213 to limit the position, and then the operator pushes the adjustment seat When 10210 slides along the electromagnetic guide rail 1026 just below the flexible corrugated cover 2024, the electromagnetic guide rail 1026 is controlled to work to adsorb and fix the adjustment seat 10210. When the bent pipe is adjusted to the corresponding position, the operator repeats the above steps to grind the inner wall of the bent pipe. When the flexible corrugated cover 2024 grinds the inner wall of the bent pipe, the flexible corrugated cover 2024 will facilitate the grinding plate 2028 to rotate and adjust the grinding process along the inner wall of the bent pipe due to the curvature of the bent pipe, the downward pushing force driven by the control cylinder 2013 and the swinging rotation force of the swing chain 2021.

[0054] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0055] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal grinding machine for steel pipes that can be used for multi-angle grinding of steel pipes, characterized in that: It comprises a clamping and fixing structure (1), on which an adjusting and polishing structure (2) is fixedly mounted; The clamping and fixing structure (1) comprises a straight pipe fixing assembly (101) fixedly mounted on the bent pipe assembly (102), and the straight pipe fixing assembly (101) comprises a mounting seat (1011) with a connecting groove (1012) at the bottom, and a concave frame box (1013) with a hollow structure inside is fixedly mounted above the mounting seat (1011); Through grooves (1014) are provided on both sides of the concave frame box (1013) for convenient fixed installation of the bent pipe assembly (102), and an adjusting cylinder (1015) with one end extending inside the concave frame box (1013) is fixed on the upper part of the concave frame box (1013), and an arc-shaped clamping plate (1016) is fixedly installed on the output end of the adjusting cylinder (1015).

2. The steel pipe internal grinding machine capable of adapting to multi-angle grinding of steel pipes according to claim 1 is characterized in that: The bending pipe assembly (102) comprises an opening frame (1021) with a guide slot (1022) provided inside, and a multi-section regulating cylinder (1023) is fixedly mounted on one end of the opening frame (1021), and the inside of the opening frame (1021) is slidingly connected to a concave strip plate (1025) via the guide slot (1022) and a slide bar (1024), and one side of the concave strip plate (1025) is fixedly connected to the output end of the multi-section regulating cylinder (1023).

3. According to claim 2, the internal grinding machine for steel pipes capable of multi-angle grinding of steel pipes is characterized in that: An electromagnetic guide rail (1026) is fixed on the concave strip plate (1025), and a card slot (1028) is provided at one end of the electromagnetic guide rail (1026) to be engaged with a card block (1027). At the same time, the upper part of the electromagnetic guide rail (1026) is connected to the adjustment seat (10210) by sliding adsorption through an adsorption guide block (1029), and the adsorption guide block (1029) is fixedly installed below the adjustment seat (10210) through a fixing groove.

4. The internal grinding machine for steel pipes capable of multi-angle grinding of steel pipes according to claim 3, characterized in that: A bidirectional electric guide rail group (10211) is also fixedly installed above the adjustment seat (10210) through a fixing groove, and a template group (10212) is fixedly installed above the bidirectional electric guide rail group (10211). At the same time, concave blocks (10213) are fixed on both sides of the template group (10212). The template group (10212) is directly clamped and fixed to the bent pipe through a fixing nut group and the concave block plate (10213).

5. The steel pipe internal grinding machine capable of adapting to multi-angle grinding of steel pipes according to claim 1, characterized in that: The adjusting and polishing structure (2) comprises an adjusting component (201) fixedly mounted on the polishing component (202), and the adjusting component (201) comprises a concave column (2011) fixed above the concave frame box (1013), and a sliding column (2012) is matchedly mounted inside the concave column (2011), one side of the sliding column (2012) is fixedly connected to the control cylinder (2013), and a driving motor (2014) is fixedly mounted above the sliding column (2012) via a fixed connecting plate.

6. The internal grinding machine for steel pipes capable of multi-angle grinding of steel pipes according to claim 5, characterized in that: The polishing assembly (202) includes a pendulum chain (2021) with a connecting threaded hole on the surface, and a spline shaft (2022) is fixedly installed at the bottom of the pendulum chain (2021), and the spline shaft (2022) is matched with a flexible corrugated cover (2024) through a spline sleeve (2023), and a through-hole plate (2025) is fixed above the flexible corrugated cover (2024), and the through-hole plate (2025) is fixedly installed above the pendulum chain (2021) through a fixing nut and a connecting threaded hole.

7. The steel pipe internal grinding machine capable of adapting to multi-angle grinding of steel pipes according to claim 6, characterized in that: The flexible bellows (2024) includes a mounting plate (2026) having a fixing hole on its surface, and a spring rod (2027) is fixed inside the mounting plate (2026) through the fixing hole, and one end of the spring rod (2027) is provided with an external thread for convenient threaded connection with a grinding plate (2028), and another connecting threaded hole is also provided at the bottom of the grinding plate (2028).

8. The internal grinding machine for steel pipes capable of multi-angle grinding of steel pipes according to claim 3, characterized in that: The electromagnetic guide rails (1026) are provided in two groups, and a single group of electromagnetic guide rails (1026) is symmetrically fixed with respect to a single concave strip plate (1025).

9. The steel pipe internal grinding machine capable of adapting to multi-angle grinding of steel pipes according to claim 7, characterized in that: The mounting plates (2026) are fixed at equal distances, and spring rods (2027) are fixedly mounted in an annular array on the surface of a single mounting plate (2026).

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