Building steel pipe straightening and grinding device

Abstract

The utility model discloses a building steel pipe straightening and polishing device which comprises a bearing frame and a bottom plate, a straightening mechanism and a polishing mechanism are arranged on the bottom plate, the straightening mechanism comprises a vertical base plate seat, a synchronous straightening roller I and a synchronous straightening roller II, a longitudinal sliding groove I is formed in the vertical base plate seat, a sliding seat is arranged in the longitudinal sliding groove I in a sliding mode, and a roller shaft I is arranged on the sliding seat in a rotating mode. The grinding mechanism comprises a grinding motor, the grinding motor is provided with a driving belt wheel, a rotating seat is arranged at the top of the bearing frame, a left rotating disc body and a right rotating disc body are arranged on the rotating seat, a driven belt wheel is arranged on the left rotating disc body, and a driven belt wheel is arranged on the right rotating disc body. A transmission belt is installed between the driving belt wheel and the driven belt wheel, a grinding cylinder is installed between the left rotating disc body and the right rotating disc body, and through holes are formed in the left rotating disc body and the right rotating disc body. The straightening and polishing integrated machine has the advantages of integrating straightening and polishing functions, being good in straightening effect and saving time and labor.

Description

Technical Field

[0001] The utility model relates to the technical field of construction devices, in particular to a straightening and grinding device for construction steel pipes. Background Art

[0002] In construction projects, various steel pipes are used on construction sites, such as the scaffolding for building construction, the upper chord and lower chord of the truss, and the columns of the greenhouse, etc. in many occasions.

[0003] Construction steel pipes are generally reused and can be removed later for use in other construction projects. After long-term use, some steel pipes will inevitably bend. Secondly, in addition to the bending situation, due to the long-term exposure of the steel pipes, there are also rust on the outer wall and adhesion of soil and dust. At present, for such steel pipes, the existing method is to first use a straightening machine to straighten them, and then manually polish and grind them. The separate operations are very time-consuming and laborious, increasing the processing procedures and unnecessary labor costs. Therefore, it is necessary to improve. Summary of the Utility Model

[0004] To solve the problems raised in the above background art. The utility model provides a straightening and grinding device for construction steel pipes, which has the characteristics of integrated straightening and grinding functions, better straightening effect, and time-saving and labor-saving operation.

[0005] To achieve the above object, the utility model provides the following technical solution: A straightening and grinding device for construction steel pipes, including a bearing frame and a bottom plate. A straightening mechanism and a grinding mechanism are arranged on the bottom plate. The straightening mechanism includes a vertical base plate seat, a synchronous straightening roller I and a synchronous straightening roller II. A longitudinal chute I is arranged on the vertical base plate seat. A sliding seat is slidably arranged in the longitudinal chute I. A roller shaft I is rotatably arranged on the sliding seat. The synchronous straightening roller I is arranged on the roller shaft I. A roller shaft II is arranged on the vertical base plate seat. The synchronous straightening roller II is arranged on the roller shaft II. A gear I is arranged at the rear of the roller shaft I. A gear II which is in transmission cooperation with the gear I is arranged at the rear of the roller shaft II. A driving motor is connected to the gear II. An upper and lower limit guiding wheel set is arranged on the vertical base plate seat. A front and rear limit guiding wheel set is arranged on the bottom plate. The grinding mechanism includes a grinding motor. The grinding motor drives and is provided with a main belt pulley. A rotating seat is arranged at the top of the bearing frame. A left-handed disc body and a right-handed disc body are arranged on the rotating seat. A driven belt pulley is arranged on the left-handed disc body. A transmission belt is installed between the main belt pulley and the driven belt pulley. A grinding cylinder is installed between the left-handed disc body and the right-handed disc body. A grinding gap is arranged between the grinding cylinders. The left-handed disc body and the right-handed disc body are provided with through holes communicating with the grinding gap.

[0006] Preferably, a motor support plate is provided on the carrier frame, and the grinding motor is fixedly installed on the motor support plate.

[0007] Preferably, an inlet pipe fitting and an outlet pipe fitting are provided on the vertical base plate seat. A conveying inlet is provided on the inlet pipe fitting, and a conveying outlet is provided on the outlet pipe fitting.

[0008] Preferably, a sealing plate I is fixedly provided at the top of the longitudinal sliding groove I. Adjusting nuts I are provided at the upper and lower parts of the sealing plate I. An adjusting screw I is provided on the sliding seat, and the adjusting screw I is threadedly installed with the adjusting nut I.

[0009] Preferably, a coupling is provided on the gear II, the driving motor is provided with a driving shaft, and the driving shaft is fixedly installed with the coupling.

[0010] Preferably, the up-and-down limit guide wheel set includes an arc guide wheel I and an arc guide wheel II. The vertical base plate seat is provided with a cross plate I and a longitudinal sliding groove II. The arc guide wheel I is rotatably provided on the cross plate I. A guide wheel seat I is slidably provided on the longitudinal sliding groove II. The arc guide wheel II is rotatably provided on the guide wheel seat I. A sealing plate II is fixedly provided at the top of the longitudinal sliding groove II. An adjusting screw II is provided on the guide wheel seat I. An adjusting nut II that cooperates with the adjusting screw II is provided on the sealing plate II. An abutting disc I is provided on the adjusting screw II, and a spring I is provided between the abutting disc I and the guide wheel seat I.

[0011] Preferably, the front-and-back limit guide wheel set includes a support plate seat, an arc guide wheel III and an arc guide wheel IV. The support plate seat is provided with a cross plate II and a vertical sliding groove. The arc guide wheel III is rotatably provided on the cross plate II. A guide wheel seat II is slidably provided on the vertical sliding groove. The arc guide wheel IV is rotatably provided on the guide wheel seat II. A sealing plate III is fixedly provided at the port of the vertical sliding groove. An adjusting screw III is provided on the guide wheel seat II. An adjusting nut III that cooperates with the adjusting screw III is provided on the sealing plate III. An abutting disc II is provided on the adjusting screw III, and a spring II is provided between the abutting disc II and the guide wheel seat II.

[0012] Preferably, a rotating part I is provided on the left-handed disc body, a bearing I that cooperates with the rotating part I is provided on the rotating seat, a rotating part II is provided on the right-handed disc body, and a bearing II that cooperates with the rotating part II is provided on the rotating seat.

[0013] Preferably, a grinding sandpaper layer is provided on the surface of the grinding cylinder.

[0014] By adopting the above technical solutions, the advantages of the present utility model compared with the prior art are as follows:

[0015] The structure of the present utility model is simple and reasonable. It adopts a semi-automatic straightening and grinding method. The steel pipe is conveyed between the synchronous straightening roller I and the synchronous straightening roller II. The driving motor drives the gear II, which drives the gear I to rotate synchronously, and then makes the roller shaft II and the roller shaft I rotate synchronously. As a result, the synchronous straightening roller I and the synchronous straightening roller II rotate synchronously and perform a relative rolling pressure action, which can well roll and straighten the steel pipe, and the straightening effect is better. The sliding structure of the sliding seat and the longitudinal chute I is convenient for adjusting the relative distance between the synchronous straightening roller I and the synchronous straightening roller II according to the diameter of the steel pipe. The steel pipe can be further guided and output through the upper and lower limit guiding wheel group and the front and rear limit guiding wheel group, and then guided and output into the grinding mechanism. In the grinding mechanism, the grinding motor drives the main pulley, and the transmission belt drives the driven pulley to rotate synchronously, and then makes the left-handed disk body rotate. Since the grinding cylinder is installed between the left-handed disk body and the right-handed disk body, the right-handed disk body also rotates synchronously, and then makes the grinding cylinder rotate around the center points of the left-handed disk body and the right-handed disk body. When the steel pipe enters the grinding gap through the through hole, the grinding cylinder rotates and grinds along the steel pipe, and the whole grinding is uniform, and the working efficiency is better. The above structure has the function of integrating straightening and grinding. The integrated operation saves time and effort, reduces the processing procedures and labor costs, and the operation is time-saving and labor-saving. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is the structural schematic diagram of the present utility model;

[0018] Figure 2 is the installation structural schematic diagram on the vertical substrate seat of the present utility model;

[0019] Figure 3 is the installation structural schematic diagram at the rear part of the sliding seat of the present utility model;

[0020] Figure 4 is the structural schematic diagram of the front and rear limit guiding wheel group of the present utility model;

[0021] Figure 5 is the structural schematic diagram of the grinding mechanism of the present utility model;

[0022] Figure 6 is the structural schematic diagram of the pipe inlet of the present utility model;

[0023] In the figure: 1, bearing frame; 2, bottom plate; 3, vertical substrate seat; 4, synchronous straightening roller I; 5, synchronous straightening roller II; 6, longitudinal chute I; 7, sliding seat; 8, roller shaft I; 9, roller shaft II; 10, gear I; 11, gear II; 12, drive motor; 13, grinding motor; 14, main pulley; 15, rotating seat; 16, left-handed disc body; 17, right-handed disc body; 18, driven pulley; 19, transmission belt; 20, grinding cylinder; 21, grinding gap; 22, through hole; 23, motor support plate; 24, inlet pipe fitting; 25, outlet pipe fitting; 26, conveying inlet; 27, conveying outlet; 28, sealing plate I; 29, adjusting nut I; 30, adjusting screw I; 31, coupling; 32, drive shaft; 33, arc guide wheel I; 34, arc guide wheel II; 35, cross plate I; 36, longitudinal chute II; 37, guide wheel seat I; 38, sealing plate II; 39, adjusting screw II; 40, adjusting nut II; 41, abutting disc I; 42, spring I; 43, support plate seat; 44, arc guide wheel III; 45, arc guide wheel IV; 46, cross plate II; 47, vertical chute; 48, guide wheel seat II; 49, sealing plate III; 50, adjusting screw III; 51, adjusting nut III; 52, abutting disc II; 53, spring II; 54, rotating part I; 55, bearing I; 56, rotating part II; 57, bearing II; 58, grinding sandpaper layer. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment

[0026] Please refer to Figure 1-6, the present utility model provides a technical solution: a straightening and grinding device for building steel pipes, including a bearing frame 1 and a bottom plate 2. A straightening mechanism and a grinding mechanism are arranged on the bottom plate 2. The straightening mechanism includes a vertical base plate seat 3, a synchronous straightening roller I 4 and a synchronous straightening roller II 5. A longitudinal chute I 6 is arranged on the vertical base plate seat 3. A sliding seat 7 is slidably arranged in the longitudinal chute I 6. A roller shaft I 8 is rotatably arranged on the sliding seat 7. The synchronous straightening roller I 4 is arranged on the roller shaft I 8. A roller shaft II 9 is arranged on the vertical base plate seat 3. The synchronous straightening roller II 5 is arranged on the roller shaft II 9. A gear I 10 is arranged at the rear of the roller shaft I 8. A gear II 11 which is in transmission cooperation with the gear I 10 is arranged at the rear of the roller shaft II 9. A driving motor 12 is connected to the gear II 11. An upper and lower limit guiding wheel set is arranged on the vertical base plate seat 3. A front and rear limit guiding wheel set is arranged on the bottom plate 2. The grinding mechanism includes a grinding motor 13. The grinding motor 13 drives a main pulley 14. A rotating seat 15 is arranged at the top of the bearing frame 1. A left-handed disc body 16 and a right-handed disc body 17 are arranged on the rotating seat 15. A driven pulley 18 is arranged on the left-handed disc body 16. A transmission belt 19 is installed between the main pulley 14 and the driven pulley 18. A grinding cylinder 20 is installed between the left-handed disc body 16 and the right-handed disc body 17. A grinding gap 21 is arranged between the grinding cylinders 20. Through holes 22 which communicate with the grinding gap 21 are arranged on the left-handed disc body 16 and the right-handed disc body 17.

[0027] In this implementation scheme, the structure of the present utility model is simple and reasonable. It adopts a semi-automatic method for straightening and grinding. The steel pipe is conveyed between the synchronous straightening roller I 4 and the synchronous straightening roller II 5. The driving motor 12 drives the gear II 11, driving the gear I 10 to rotate synchronously, and then making the roller shaft II 9 and the roller shaft I 8 rotate synchronously, so that the synchronous straightening roller I 4 and the synchronous straightening roller II 5 rotate synchronously and perform a relative rolling pressure action, which can well roll and straighten the steel pipe, and the straightening effect is better. The sliding structure of the sliding seat 7 and the longitudinal chute I 6 facilitates adjusting the relative distance between the synchronous straightening roller I 4 and the synchronous straightening roller II 5 according to the diameter of the steel pipe, and the steel pipe can be further guided and output through the upper and lower limit guiding wheel set and the front and rear limit guiding wheel set, and then guided and output into the grinding mechanism. Among them, the grinding motor 13 drives the main pulley 14, making the transmission belt 19 drive the driven pulley 18 to rotate synchronously, and then making the left-handed disc body 16 rotate. Since the grinding cylinder 20 is installed between the left-handed disc body 16 and the right-handed disc body 17, the right-handed disc body 17 also rotates synchronously, and then making the grinding cylinder 20 rotate around the center points of the left-handed disc body 16 and the right-handed disc body 17. When the steel pipe enters the grinding gap 21 through the through hole 22, the grinding cylinder 20 rotates and grinds against the steel pipe. The whole grinding is uniform and the working efficiency is better. The above structure has the function of integrating straightening and grinding. The integrated operation saves time and effort, reduces the processing procedures and reduces the labor cost, and the operation is time-saving and labor-saving.

[0028] Specifically, the steel pipe is fed in by manual pushing, which is convenient for control. During the grinding process, the steel pipe also needs to be controlled manually to make the grinding cylinder 20 grind more stably. The length of the steel pipe is greater than the length of the grinding cylinder 20. During operation, when grinding the left part of the steel pipe, the right part of the steel pipe is manually controlled. The right part of the steel pipe is located outside the right rotating disk body 17. When grinding the right part of the steel pipe, the left part of the already ground steel pipe is manually controlled, and the left part of the steel pipe is located outside the left rotating disk body 16.

[0029] Furthermore, a motor support plate 23 is provided on the carrier frame 1, and the grinding motor 13 is fixedly installed on the motor support plate 23.

[0030] In this embodiment, the motor support plate 23 can well support the grinding motor 13.

[0031] Furthermore, a pipe inlet 24 and a pipe outlet 25 are provided on the vertical substrate base 3. A conveying inlet 26 is provided on the pipe inlet 24, and a conveying outlet 27 is provided on the pipe outlet 25.

[0032] In this embodiment, the pipe inlet 24 functions to guide the conveying and entry, the pipe outlet 25 functions to guide the output, and the conveying inlet 26 and the conveying outlet 27 are larger than the diameter of the steel pipe to facilitate entry.

[0033] Furthermore, a sealing plate I 28 is fixedly provided at the top of the longitudinal sliding groove I 6. Adjusting nuts I 29 are provided on the upper and lower parts of the sealing plate I 28. An adjusting screw I 30 is provided on the sliding seat 7, and the adjusting screw I 30 is threadedly installed with the adjusting nut I 29.

[0034] In this embodiment, by the threaded installation of the adjusting screw I 30 and the adjusting nut I 29, the position of the sliding seat 7 can be adjusted and positioned.

[0035] Furthermore, a coupling 31 is provided on the gear II 11, and the driving motor 12 is provided with a driving shaft 32. The driving shaft 32 is fixedly installed with the coupling 31.

[0036] In this embodiment, the use of the coupling 31 facilitates the stable driving of the driving motor 12.

[0037] Further, the upper and lower limit guide wheel set includes an arc guide wheel I33 and an arc guide wheel II34. The vertical substrate seat 3 is provided with a cross plate I35 and a longitudinal chute II36. The arc guide wheel I33 is rotatably arranged on the cross plate I35. A guide wheel seat I37 is slidably arranged on the longitudinal chute II36. The arc guide wheel II34 is rotatably arranged on the guide wheel seat I37. A sealing plate II38 is fixedly arranged at the top of the longitudinal chute II36. An adjusting screw II39 is arranged on the guide wheel seat I37. An adjusting nut II40 matched with the adjusting screw II39 is arranged on the sealing plate II38. An abutting disc I41 is arranged on the adjusting screw II39. A spring I42 is arranged between the abutting disc I41 and the guide wheel seat I37.

[0038] In this embodiment, through the mutual cooperation of the arc guide wheel I33 and the arc guide wheel II34, adopting an arc structure, it can match the shape of the steel pipe, and use the rotating structure for guiding and conveying. Among them, the thread structure of the adjusting screw II39 and the adjusting nut II40 can adjust the initial position of the guide wheel seat I37. A spring I42 is arranged between the abutting disc I41 and the guide wheel seat I37, which can cooperate with the initial position adjusted by the guide wheel seat I37 to form a spatially floating steel pipe conveying gap. The acting force of the spring I42 makes the arc guide wheel II34 press against the steel pipe. At the same time, due to the floating steel pipe conveying gap and the fixed arc guide wheel I33, it is convenient for guiding and conveying, with better guiding and conveying performance and achieving upper and lower limits.

[0039] Further, the front and rear limit guide wheel set includes a support plate seat 43, an arc guide wheel III44 and an arc guide wheel IV45. The support plate seat 43 is provided with a cross plate II46 and a vertical chute 47. The arc guide wheel III44 is rotatably arranged on the cross plate II46. A guide wheel seat II48 is slidably arranged on the vertical chute 47. The arc guide wheel IV45 is rotatably arranged on the guide wheel seat II48. A sealing plate III49 is fixedly arranged at the port of the vertical chute 47. An adjusting screw III50 is arranged on the guide wheel seat II48. An adjusting nut III51 matched with the adjusting screw III50 is arranged on the sealing plate III49. An abutting disc II52 is arranged on the adjusting screw III50. A spring II53 is arranged between the abutting disc II52 and the guide wheel seat II48.

[0040] In this embodiment, through the mutual cooperation of the arc-shaped guide wheel III 44 and the arc-shaped guide wheel IV 45, an arc-shaped structure is adopted, which can match the shape of the steel pipe and guide and convey it by means of a rotating structure. Among them, the threaded structure of the adjusting screw III 50 and the adjusting nut III 51 can adjust the initial position of the guide wheel seat II 48. A spring II 53 is arranged between the abutting disc II 52 and the guide wheel seat II 48, which can cooperate with the initial position adjusted by the guide wheel seat II 48 to form a spatially floating steel pipe conveying gap. The acting force of the spring II 53 makes the arc-shaped guide wheel IV 45 press against the steel pipe. At the same time, due to the floating steel pipe conveying gap and the cooperation with the fixed arc-shaped guide wheel III 44, it is convenient for guiding and conveying, with better guiding and conveying performance and achieving front and rear limiting.

[0041] Further, a rotating part I 54 is arranged on the left-handed disc body 16, a bearing I 55 matched with the rotating part I 54 is arranged on the rotating seat 15, a rotating part II 56 is arranged on the right-handed disc body 17, and a bearing II 57 matched with the rotating part II 56 is arranged on the rotating seat 15.

[0042] In this embodiment, through the arrangement of the bearing I 55 and the bearing II 57, the left-handed disc body 16 can rotate normally by means of the rotating part I 54, and the right-handed disc body 17 can rotate normally by means of the rotating part II 56.

[0043] Further, a polishing sandpaper layer 58 is arranged on the surface of the polishing cylinder 20.

[0044] In this embodiment, the polishing sandpaper layer 58 has a better polishing effect on the steel pipe, and different-precision polishing sandpaper layers 58 can be replaced according to the use requirements.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0046] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A construction steel pipe straightening and grinding device, characterized in that: The invention comprises a carrier frame (1) and a base plate (2), wherein the base plate (2) is provided with a straightening mechanism and a grinding mechanism, wherein the straightening mechanism comprises a vertical base plate seat (3), a synchronous straightening roller I (4) and a synchronous straightening roller II (5), wherein the vertical base plate seat (3) is provided with a longitudinal slide groove I (6), wherein a sliding seat (7) is slidably provided in the longitudinal slide groove I (6), wherein a roller shaft I (8) is rotatably provided on the sliding seat (7), wherein the synchronous straightening roller I (4) is provided on the roller shaft I (8), wherein a roller shaft II (9) is provided on the vertical base plate seat (3), wherein the synchronous straightening roller II (5) is provided on the roller shaft II (9), wherein a gear I (10) is provided at the rear of the roller shaft I (8), wherein a gear II (11) which is in transmission cooperation with the gear I (10) is provided at the rear of the roller shaft II (9), wherein a driving motor (12) is connected to the gear II (11) ), the vertical base seat (3) is provided with an upper and lower limit guide wheel group, the bottom plate (2) is provided with a front and rear limit guide wheel group, the grinding mechanism comprises a grinding motor (13), the grinding motor (13) is driven by a main pulley (14), the top of the carrier (1) is provided with a rotating seat (15), the rotating seat (15) is provided with a left-hand rotating disc body (16) and a right-hand rotating disc body (17), the left-hand rotating disc body (16) is provided with a slave pulley (18), a transmission belt (19) is installed between the main pulley (14) and the slave pulley (18), a grinding cylinder (20) is installed between the left-hand rotating disc body (16) and the right-hand rotating disc body (17), a grinding gap (21) is provided between the grinding cylinders (20), and the left-hand rotating disc body (16) and the right-hand rotating disc body (17) are provided with a through hole (22) that communicates with the grinding gap (21).

2. A construction steel pipe straightening and grinding device according to claim 1, characterized in that: The carrier frame (1) is provided with a motor support plate (23), and the grinding motor (13) is fixedly mounted on the motor support plate (23).

3. A construction steel pipe straightening and grinding device according to claim 1, characterized in that: The vertical base plate seat (3) is provided with an inlet pipe member (24) and an outlet pipe member (25); the inlet pipe member (24) is provided with a conveying inlet (26); and the outlet pipe member (25) is provided with a conveying outlet (27).

4. A construction steel pipe straightening and grinding device according to claim 1, characterized in that: A sealing plate I (28) is fixedly provided on the top of the longitudinal slide groove I (6), and an adjusting nut I (29) is provided on the upper and lower parts of the sealing plate I (28). An adjusting screw rod I (30) is provided on the sliding seat (7), and the adjusting screw rod I (30) is threadedly installed with the adjusting nut I (29).

5. The construction steel pipe straightening and grinding device according to claim 1, characterized in that: The gear II (11) is provided with a coupling (31), the drive motor (12) is provided with a drive shaft (32), and the drive shaft (32) is fixedly mounted on the coupling (31).

6. A construction steel pipe straightening and grinding device according to claim 1, characterized in that: The upper and lower limit guide wheel group comprises an arc guide wheel I (33) and an arc guide wheel II (34); the vertical base plate seat (3) is provided with a transverse plate I (35) and a longitudinal slide groove II (36); the arc guide wheel I (33) is rotatably arranged on the transverse plate I (35); a guide wheel seat I (37) is slidably arranged on the longitudinal slide groove II (36); the arc guide wheel II (34) is rotatably arranged on the guide wheel seat I (37); a sealing plate II (38) is fixedly arranged on the top of the longitudinal slide groove II (36); an adjusting screw II (39) is arranged on the guide wheel seat I (37); an adjusting nut II (40) cooperating with the adjusting screw II (39) is arranged on the sealing plate II (38); an abutting plate I (41) is arranged on the adjusting screw II (39); a spring I (42) is arranged between the abutting plate I (41) and the guide wheel seat I (37).

7. The construction steel pipe straightening and grinding device according to claim 1, characterized in that: The front and rear limiting guide wheel group comprises a support plate seat (43), an arc-shaped guide wheel III (44) and an arc-shaped guide wheel IV (45); the support plate seat (43) is provided with a transverse plate II (46) and a vertical slide groove (47); the arc-shaped guide wheel III (44) is rotatably arranged on the transverse plate II (46); a guide wheel seat II (48) is slidably arranged on the vertical slide groove (47); the arc-shaped guide wheel IV (45) is rotatably arranged on the guide wheel seat II (48) A sealing plate III (49) is fixedly provided at the end of the vertical slide groove (47), an adjusting screw III (50) is provided on the guide wheel seat II (48), an adjusting nut III (51) cooperating with the adjusting screw III (50) is provided on the sealing plate III (49), an abutment plate II (52) is provided on the adjusting screw III (51), and a spring II (53) is provided between the abutment plate II (52) and the guide wheel seat II (48).

8. The construction steel pipe straightening and grinding device according to claim 1, characterized in that: The left-handed disk body (16) is provided with a rotating part I (54), and the rotating seat (15) is provided with a bearing I (55) matched with the rotating part I (54). The right-handed disk body (17) is provided with a rotating part II (56), and the rotating seat (15) is provided with a bearing II (57) matched with the rotating part II (56).

9. A construction steel pipe straightening and grinding device according to claim 1, characterized in that: The surface of the grinding cylinder (20) is provided with a grinding sandpaper layer (58).

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