Round tube straightness measuring and detecting device

Abstract

The invention provides a round pipe straightness measuring and detecting device, and relates to the technical field of pipeline measuring and detecting, the round pipe straightness measuring and detecting device comprises a machine table, a measuring and detecting mechanism and a round pipe fixing and rotating mechanism are arranged on the machine table, the measuring and detecting mechanism is arranged on the machine table in a sliding mode, and the round pipe fixing and rotating mechanism is fixedly connected to the machine table and arranged on one side of the measuring and detecting mechanism. The round tube fixing and rotating mechanism comprises round tube rotation driving mechanisms, a detection mechanism centering auxiliary mechanism and a translation type round tube fixing mechanism, the round tube rotation driving mechanisms are fixedly connected to the machine table, are symmetrically arranged and are used for supporting round tubes, and the translation type round tube fixing mechanism is used for fixing the round tubes; the two ends of the detection mechanism centering auxiliary mechanism are connected with the two round pipe rotation driving mechanisms respectively, the middle of the detection mechanism centering auxiliary mechanism is attached to a round pipe, one end of the translation type round pipe fixing mechanism is coaxially and fixedly connected with the detection mechanism centering auxiliary mechanism, and the other end of the translation type round pipe fixing mechanism is attached to the round pipe in a pressing mode. The diameter detection of the circular tube is facilitated, and the detection precision is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline measurement and detection, and in particular to a round pipe straightness measurement and detection device. Background Art

[0002] Straightness is a form tolerance that limits the variation of an actual straight line from an ideal straight line. It consists of four elements: shape, size, direction, and position.

[0003] The existing round tube straightness detection mechanism consists of a machine platform, a measuring and detecting instrument, and a round tube driving mechanism that drives the round tube to rotate. During use, the round tube is placed on the round tube driving mechanism, and the detection head of the measuring and detecting instrument is adjusted by an adjusting arm so that the detection head contacts the round tube and the extension line of the detection head passes through the cross-sectional plane of the round tube.

[0004] Through the above-mentioned use process, there are the above-mentioned problems: 1. The measuring and testing instrument is adjusted manually, which makes it difficult to make the extension line of the end of the measuring and testing instrument pass through the cross-sectional plane of the round tube, thus affecting the detection accuracy; Second, directly placing the round tube on the driving mechanism, when the driving mechanism drives the round tube to rotate, it is inevitable that the round tube will be displaced horizontally, so that the round tube will not be detected at the cross-section circle during the inspection; In view of the above problems, we propose a round tube straightness measurement and detection device. Summary of the invention

[0005] In view of the problem that the extension line of the detection head of the measuring and detecting instrument in the above-mentioned prior art is difficult to pass through the center of the round tube and position deviation occurs when the round tube rotates, we propose a round tube straightness measuring and detecting device.

[0006] The present invention provides a round tube straightness measuring and detecting device, comprising a machine platform, on which a measuring and detecting mechanism and a round tube fixing and rotating mechanism are arranged, the measuring and detecting mechanism is slidably arranged on the machine platform, and the round tube fixing and rotating mechanism is fixedly connected to the machine platform and arranged on one side of the measuring and detecting mechanism; The round tube fixing and rotating mechanism includes a round tube rotation driving mechanism, a detection mechanism centering auxiliary mechanism, and a translational round tube fixing mechanism. The round tube rotation driving mechanism is fixedly connected to the machine platform, and two groups are symmetrically provided for supporting the round tube. The two ends of the detection mechanism centering auxiliary mechanism are respectively connected to the two round tube rotation driving mechanisms, and the middle part of the detection mechanism centering auxiliary mechanism is in contact with the round tube. One end of the translational round tube fixing mechanism is coaxially fixed to the detection mechanism centering auxiliary mechanism, and the other end is pressed against the round tube.

[0007] A further improvement scheme of the present invention is that the measuring and detecting mechanism includes a slide bar, a slide table, an adjustment arm mechanism, and a measuring and detecting instrument. The slide bar is fixedly connected to the machine platform, the slide table is slidably arranged on the slide bar, the adjustment arm mechanism is arranged on the slide table, and the measuring and detecting instrument is arranged on the adjustment arm mechanism.

[0008] A further improvement scheme of the present invention is that the circular tube rotation drive mechanism includes a support platform, a support seat, and a driving wheel. The support platform is fixedly connected to the machine platform, and the support seat is fixedly connected to the support platform. The support seat is provided with four groups, which are symmetrically distributed in the directions of the X-axis and the Y-axis. The driving wheel is rotatable on two adjacent support seats in the direction of the X-axis through a rotating shaft, and the driving wheel is in contact with the circular tube.

[0009] According to a further improvement of the present invention, a driving motor is fixedly connected to one of the support platforms, an output end of the driving motor is connected to an end of one of the rotating shafts, two adjacent rotating shafts are coaxially fixed with pulleys, and the two pulleys are connected by a belt.

[0010] A further improvement scheme of the present invention, the centering auxiliary mechanism of the detection mechanism includes a bevel gear mechanism, a connecting plate 1, a connecting plate 2, a centering plate 1, and a centering plate 2, the bevel gear mechanism is fixedly connected to the support platform, the connecting plate 1 and the connecting plate 2 are respectively coaxially fixedly connected to the bevel gear mechanism, the centering plate 1 is fixedly connected to the connecting plate 1, the centering plate 2 is fixedly connected to the connecting plate 2, the opposite end faces of the centering plate 1 and the centering plate 2 are fitted, the centering plate 1 and the centering plate 2 are fitted to the outer surface of the circular tube, the centering plate 1 and the centering plate 2 are respectively provided with interconnected centering grooves, the detection head of the measuring detector is arranged in the centering groove and in contact with the circular tube; An arc handle is fixedly connected to the end surface of the centering plate 1 away from the centering plate 2.

[0011] A further improvement of the present invention is that the bevel gear mechanism comprises bevel gear 1, bevel gear 2 and bevel gear 3, the support platform is fixedly connected with support vertical plate 1 and support vertical plate 2, the bevel gear 1 is coaxially fixedly connected with a connecting shaft rotatably connected with support vertical plate 1, the connecting shaft is concentric with the circular tube, and the two ends of the connecting shaft pass through bevel gear 1 and bevel gear 3 respectively, the bevel gear 2 is meshed with bevel gear 1, the bevel gear 2 is rotatably connected with support vertical plate 2, the bevel gear 3 is meshed with bevel gear 2, and the bevel gear 3 is coaxially rotatably sleeved on the connecting shaft; The connecting plate 1 is fixedly connected to the bevel gear 1, and the connecting plate 2 is fixedly connected to the bevel gear 3.

[0012] A further improvement scheme of the present invention is that the translational circular tube fixing mechanism includes an end pressure plate and a pushing member, the end pressure plate is attached to the end of the circular tube, one end of the pushing member is coaxially connected to the end of the end pressure plate away from the circular tube, and the other end is coaxially fixedly connected to the connecting shaft, and the pushing member is fixedly connected to the support platform.

[0013] A further improvement scheme of the present invention, the pushing member includes a fixed vertical plate, a threaded sleeve, a threaded rod, and a guide mechanism, the fixed vertical plate is fixedly connected to the support platform, the threaded sleeve movably passes through the fixed vertical plate and is rotatably connected to the end pressure plate, one end of the threaded rod is coaxially fixedly connected to the connecting shaft, and the other end is threadedly connected to the threaded sleeve, and the guide mechanism is fixedly connected to the threaded sleeve and movably passes through the fixed vertical plate.

[0014] According to a further improvement of the present invention, the guide mechanism comprises a connecting block and a guide rod, wherein the connecting block is fixedly connected to the threaded sleeve, the guide rod is fixedly connected to the connecting block, and the guide rod movably passes through the fixed vertical plate.

[0015] Beneficial effects of the present invention: The present invention provides a round tube straightness measurement and detection device: 1. The centering plate 1 and the centering plate 2 are rotated so that the opposite surfaces of the centering plate 1 and the centering plate 2 are fitted together, and the two centering grooves are connected together. The detection head of the measuring and detecting instrument is placed between the two centering grooves and contacts the round tube, ensuring that the end of the measuring and detecting instrument passes through the cross-sectional plane of the round tube, thereby ensuring the detection accuracy; Second, both the first and second return plates are arranged on the bevel gear mechanism. Under the action of the bevel gear mechanism, only the first return plate needs to be rotated to drive the second return plate to approach or move away from the first return plate, thereby reducing the amount of operation; 3. When the return plate rotates, it drives the bevel gear mechanism to operate, thereby driving the pusher to move, and then pushing the two end pressure plates closer to each other, restricting the round tube from moving horizontally, ensuring the detection accuracy; Fourth, the rotation of the centering plate provides power for the lateral movement of the end pressure plate, which reduces the use of the power mechanism and thus reduces the waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of a round tube straightness measuring and detecting device of the present invention is Figure 1 .

[0017] Figure 2 The structure of a round tube straightness measuring and detecting device of the present invention is Figure 2 .

[0018] Figure 3 The present invention is a structural diagram of a measuring and detecting mechanism of a round tube straightness measuring and detecting device.

[0019] Figure 4 The structure of the round tube rotation driving mechanism of the round tube straightness measuring and detecting device of the present invention is Figure 1 .

[0020] Figure 5 The structure of the round tube rotation driving mechanism of the round tube straightness measuring and detecting device of the present invention is Figure 2 .

[0021] Figure 6 The present invention is a structural diagram of a centering auxiliary mechanism of a detection mechanism of a round tube straightness measurement and detection device.

[0022] Figure 7 The present invention provides a top view of a centering groove of a round tube straightness measuring and detecting device.

[0023] Figure 8 The present invention is a structural diagram of a bevel gear mechanism of a round tube straightness measuring and detecting device.

[0024] Fig. 9 The present invention is a structural diagram of a bevel gear mechanism and a pusher of a round tube straightness measuring and detecting device.

[0025] Fig.10 A round tube straightness measuring and detecting device according to the present invention Fig. 9 Enlarged view of point A in the middle.

[0026] In the attached figure: 1, machine; 2, measuring and detecting mechanism; 3, round tube fixing and rotating mechanism; 4, round tube rotating driving mechanism; 5, detecting mechanism centering auxiliary mechanism; 6, translational round tube fixing mechanism; 7, slide bar; 8, slide table; 9, adjusting arm mechanism; 10, measuring and detecting instrument; 11, supporting table; 12, supporting seat; 13, driving wheel; 14, driving motor; 15, pulley; 16, belt; 17, bevel gear mechanism; 18, connecting Plate 1; 19, connecting plate 2; 20, centering plate 1; 21, centering plate 2; 22, centering groove; 23, bevel gear 1; 24, bevel gear 2; 25, bevel gear 3; 26, supporting vertical plate 1; 27, supporting vertical plate 2; 28, connecting shaft; 29, end pressure plate; 30, pushing member; 31, fixed vertical plate; 32, threaded sleeve; 33, threaded rod; 34, guide mechanism; 35, connecting block; 36, guide rod; 37, arc handle. DETAILED DESCRIPTION

[0027] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0028] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] according to Figure 1 , Figure 2 A round tube straightness measuring and detecting device is shown, comprising a machine platform 1, on which a measuring and detecting mechanism 2 and a round tube fixing and rotating mechanism 3 are provided. The diameter of the round tube is detected by the measuring and detecting mechanism 2, and the round tube fixing and rotating mechanism 3 assists the use of the measuring and detecting mechanism 2 and drives the round tube to rotate after limiting the position of the round tube in the direction of the X-axis. The measuring and detecting mechanism 2 is slidably arranged on the machine platform 1, which is convenient for adjusting the position of the measuring and detecting mechanism 2, so as to detect multiple positions of the round tube. The round tube fixing and rotating mechanism 3 is fixedly connected to the machine platform 1 and arranged on one side of the measuring and detecting mechanism 2; according to Figure 1 , Figure 2 The round tube fixing and rotating mechanism 3 includes a round tube rotating drive mechanism 4, a detection mechanism centering auxiliary mechanism 5, and a translational round tube fixing mechanism 6. The round tube rotating drive mechanism 4 is fixedly connected to the machine table 1, and two groups are symmetrically provided for supporting the round tube. The two ends of the detection mechanism centering auxiliary mechanism 5 are respectively connected to the two round tube rotating drive mechanisms 4, and the middle part of the detection mechanism centering auxiliary mechanism 5 is in contact with the round tube. One end of the translational round tube fixing mechanism 6 is coaxially fixed to the detection mechanism centering auxiliary mechanism 5, and the other end is pressed against the round tube, which is used to limit the position of the round tube in the direction of the X-axis. The detection mechanism centering auxiliary mechanism 5 ensures that the detection head of the measuring and detection mechanism 2 is at the cross-sectional plane of the round tube.

[0031] The present invention is based on Figure 1 , Figure 3 The measuring and detecting mechanism 2 includes a slide bar 7, a slide table 8, an adjustment arm mechanism 9, and a measuring and detecting instrument 10. The slide bar 7 is fixedly connected to the machine table 1. The slide table 8 is slidably arranged on the slide bar 7 and is used to adjust the position of the measuring and detecting instrument 10. The adjustment arm mechanism 9 is arranged on the slide table 8. The measuring and detecting instrument 10 is arranged on the adjustment arm mechanism 9. The measuring and detecting instrument 10 is adjusted by the adjustment arm mechanism 9.

[0032] The present invention is based on Figure 2, Figure 4 , Figure 5 The circular tube rotation driving mechanism 4 comprises a support platform 11, a support seat 12, and a driving wheel 13. The support platform 11 is fixedly connected to the machine platform 1, and the support seat 12 is fixedly connected to the support platform 11. The support seat 12 is provided with four groups, which are symmetrically distributed in the directions of the X-axis and the Y-axis. The driving wheel 13 is arranged on two adjacent support seats 12 in the direction of the X-axis through the rotation of the rotating shaft. The driving wheel 13 fits the circular tube. A driving motor 14 is fixedly connected to one of the support platforms 11, and the output end of the driving motor 14 is connected to the end of one of the rotating shafts. Pulleys 15 are coaxially fixedly provided on two adjacent rotating shafts, and the two pulleys 15 are connected by a belt 16. When the driving motor 14 is started, the rotating shaft is driven to rotate, thereby driving one of the driving wheels 13 to rotate. At the same time, when the rotating shaft rotates, the pulley 15 thereon is driven to rotate, and the adjacent pulley 15 is driven to rotate through the belt 16, thereby driving the adjacent driving wheel 13 to rotate, thereby driving the circular tube to rotate through the two driving wheels 13 in the same direction.

[0033] The present invention is based on Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 The detection mechanism centering auxiliary mechanism 5 includes a bevel gear mechanism 17, a connecting plate 18, a connecting plate 2 19, a centering plate 1 20, and a centering plate 21. The bevel gear mechanism 17 is fixedly connected to the support platform 11, and the connecting plate 18 and the connecting plate 2 19 are respectively coaxially fixed to the bevel gear mechanism 17. The centering plate 1 20 is fixedly connected to the connecting plate 18, and the outer end surface of the upper end of the connecting plate 18 is arc-fitted with the inner end surface of the centering plate 2 21. The centering plate 21 is fixedly connected to the connecting plate 2 19, and the outer end surface of the upper end of the connecting plate 2 19 is arc-fitted with the inner end surface of the centering plate 2 The inner end surface of the first plate 20 is in arc-shaped contact, the opposite end surfaces of the first plate 20 and the second plate 21 are in contact, the first plate 20 and the second plate 21 are in contact with the outer surface of the circular tube, the first plate 20 and the second plate 21 are respectively provided with communicating centering grooves 22, the detection head of the measuring and detecting instrument 10 is arranged in the centering groove 22 and contacts the circular tube, and the connecting plate 18 can drive the connecting plate 2 19 to rotate when rotating through the bevel gear mechanism 17, so that the first plate 20 and the second plate 21 can be close to each other or away from each other at the same time; according to Figure 6 An arc handle 37 is fixedly connected to the end surface of the centering plate 1 20 away from the centering plate 2 21 , and the arc handle 37 is used to facilitate the rotation of the centering plate 1 20 .

[0034] The present invention is based on Figure 5 , Figure 6 , Figure 7 , Figure 8 The bevel gear mechanism 17 includes a bevel gear 1 23, a bevel gear 24, and a bevel gear 3 25. The support platform 11 is fixedly connected with a support vertical plate 1 26 and a support vertical plate 27. The bevel gear 1 23 is coaxially fixedly connected with a connecting shaft 28 that is rotatably connected to the support vertical plate 1 26. The connecting shaft 28 is concentric with the circular tube. Both ends of the connecting shaft 28 pass through the bevel gear 1 23 and the bevel gear 3 25 respectively. The bevel gear 24 is meshed with the bevel gear 1 23. The bevel gear 24 is rotatably connected with the support vertical plate 27. The bevel gear 3 25 is meshed with the bevel gear 2 24. The bevel gear 3 2 The connecting plate 1 18 is coaxially rotatably sleeved on the connecting shaft 28, the connecting plate 1 18 is fixedly connected to the bevel gear 1 23, and the connecting plate 2 19 is fixedly connected to the bevel gear 3 25. When the bevel gear 1 23 rotates, the bevel gear 2 24 is driven to rotate, and the bevel gear 3 25 is mobilized to rotate, thereby driving the centering plate 2 21 to rotate. Since the bevel gear 3 25 rotates in opposite directions to the bevel gear 1 23, the centering plate 1 20 rotates in opposite directions to the centering plate 2 21. At this time, the centering plate 1 20 and the centering plate 2 21 rotate relatively close to each other, ensuring that the two centering grooves 22 are connected together.

[0035] The present invention is based on Figure 2 , Figure 5 , Figure 8 , Fig. 9 The translational circular tube fixing mechanism 6 includes an end pressure plate 29 and a pushing member 30. The end pressure plate 29 is attached to the end of the circular tube. One end of the pushing member 30 is coaxially connected to the end of the end pressure plate 29 away from the circular tube, and the other end is coaxially fixedly connected to the connecting shaft 28. The pushing member 30 is fixedly connected to the support platform 11. When the connecting shaft 28 rotates, it drives the pushing member 30 to run, thereby pushing the end pressure plate 29 to approach the end of the circular tube to limit the circular tube.

[0036] The present invention is based on Figure 5 , Figure 8 , Fig. 9 The pushing member 30 includes a fixed vertical plate 31, a threaded sleeve 32, a threaded rod 33, and a guide mechanism 34. The fixed vertical plate 31 is fixedly connected to the support platform 11. The threaded sleeve 32 movably passes through the fixed vertical plate 31 and is rotatably connected to the end pressure plate 29. One end of the threaded rod 33 is coaxially fixedly connected to the connecting shaft 28, and the other end is threadedly connected to the threaded sleeve 32. When the threaded rod 33 rotates, it will drive the threaded sleeve 32 to move, thereby allowing the end pressure plate 29 to move. The guide mechanism 34 is fixedly connected to the threaded sleeve 32 and movably passes through the fixed vertical plate 31. The rotation of the threaded sleeve 32 is prevented by the guide mechanism 34.

[0037] The present invention is based on Fig. 9 , Fig.10The guide mechanism 34 includes a connecting block 35 and a guide rod 36. The connecting block 35 is fixedly connected to the threaded sleeve 32. The guide rod 36 is fixedly connected to the connecting block 35. The guide rod 36 movably passes through the fixed vertical plate 31. The guide rod 36 passes through the connecting block 35, so that the guide rod 36 can only be displaced horizontally, thereby avoiding the rotation of the threaded sleeve 32.

[0038] Principle of the present invention: When in use, the round tube is placed on the driving wheel 13, and the arc handle 37 is pulled to drive the centering plate 20 to rotate around the connecting shaft 28. When the centering plate 20 rotates, the connecting shaft 28 is driven to rotate through the connecting plate 18, thereby driving the bevel gear 1 23 to rotate, and then driving the bevel gear 2 24 to rotate, and then mobilizing the bevel gear 3 25 to rotate, thereby driving the centering plate 21 to rotate. Since the rotation direction of the bevel gear 3 25 is opposite to that of the bevel gear 1 23, the rotation direction of the centering plate 1 20 and the centering plate 2 21 are opposite. At this time, the centering plate 1 20 and the centering plate 2 21 rotate relative to each other, and the two centering grooves 22 are connected together. The detection probe of the measuring detector 10 is placed in the centering groove 22 and fits the round tube. At this time, the end of the detection probe is disposed on the cross-sectional plane of the round tube to ensure the detection accuracy. When the centering plate 20 drives the bevel gear 23 and the connecting shaft 28 to rotate, the threaded rod 33 is driven to rotate. The rotating threaded rod 33 drives the threaded sleeve 32 to move, and drives the end pressure plate 29 rotatably connected to the threaded sleeve 32 to move. The two end pressure plates 29 are close to each other. When the two centering grooves 22 are connected together, the two end pressure plates 29 restrict the round tube to prevent its lateral movement. The driving motor 14 is started, driving the rotating shaft to rotate, thereby driving one of the driving wheels 13 to rotate. At the same time, when the rotating shaft rotates, it drives the pulley 15 thereon to rotate, and through the belt 16, drives the adjacent pulley 15 to rotate, thereby driving the adjacent driving wheel 13 to rotate, and the round tube is driven to rotate through the two driving wheels 13 in the same direction, and the diameter of the round tube is detected by the measuring detector 10.

[0039] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the authorization requirements.

Claims

1. A round tube straightness measurement and detection device, characterized in that: The machine comprises a platform (1), wherein the platform (1) is provided with a measuring and detecting mechanism (2) and a round tube fixing and rotating mechanism (3), wherein the measuring and detecting mechanism (2) is slidably arranged on the platform (1), and the round tube fixing and rotating mechanism (3) is fixedly connected to the platform (1) and arranged on one side of the measuring and detecting mechanism (2); The round tube fixing and rotating mechanism (3) comprises a round tube rotating drive mechanism (4), a detection mechanism centering auxiliary mechanism (5), and a translational round tube fixing mechanism (6). The round tube rotating drive mechanism (4) is fixedly connected to the machine platform (1), and two groups are symmetrically provided for supporting the round tube. The two ends of the detection mechanism centering auxiliary mechanism (5) are respectively connected to the two round tube rotating drive mechanisms (4), and the middle part of the detection mechanism centering auxiliary mechanism (5) is in contact with the round tube. One end of the translational round tube fixing mechanism (6) is coaxially fixedly connected to the detection mechanism centering auxiliary mechanism (5), and the other end is pressed against the round tube.

2. The device for measuring and detecting the straightness of a round tube according to claim 1, characterized in that: The measuring and detecting mechanism (2) comprises a slide bar (7), a slide table (8), an adjusting arm mechanism (9), and a measuring and detecting instrument (10); the slide bar (7) is fixedly connected to the machine table (1); the slide table (8) is slidably arranged on the slide bar (7); the adjusting arm mechanism (9) is arranged on the slide table (8); and the measuring and detecting instrument (10) is arranged on the adjusting arm mechanism (9).

3. The device for measuring and detecting the straightness of a round tube according to claim 1, characterized in that: The circular tube rotation driving mechanism (4) comprises a support platform (11), a support seat (12), and a driving wheel (13); the support platform (11) is fixedly connected to the machine platform (1); the support seat (12) is fixedly connected to the support platform (11); four groups of the support seats (12) are provided, and are symmetrically distributed in the directions of the X-axis and the Y-axis; the driving wheel (13) is rotatably arranged on two adjacent supporting seats (12) in the direction of the X-axis via a rotating shaft; and the driving wheel (13) is in contact with the circular tube.

4. The device for measuring and detecting the straightness of a round tube according to claim 3, characterized in that: A drive motor (14) is fixedly connected to one of the support platforms (11), and an output end of the drive motor (14) is connected to an end of one of the rotating shafts. Pulleys (15) are coaxially fixedly sleeved on two adjacent rotating shafts, and the two pulleys (15) are connected via a belt (16).

5. The device for measuring and detecting the straightness of a round tube according to claim 3, characterized in that: The detection mechanism centering auxiliary mechanism (5) comprises a bevel gear mechanism (17), a connecting plate 1 (18), a connecting plate 2 (19), a centering plate 1 (20), and a centering plate 2 (21); the bevel gear mechanism (17) is fixedly connected to the support platform (11); the connecting plate 1 (18) and the connecting plate 2 (19) are respectively coaxially fixedly connected to the bevel gear mechanism (17); the centering plate 1 (20) is fixedly connected to the connecting plate 1 (18); the centering plate 2 (21) is fixedly connected to the connecting plate 2 (19); the opposite end surfaces of the centering plate 1 (20) and the centering plate 2 (21) are in contact with each other; the centering plate 1 (20) and the centering plate 2 (21) are in contact with the outer surface of the circular tube; the centering plate 1 (20) and the centering plate 2 (21) are respectively provided with interconnected centering grooves (22); and the detection head of the measuring and detecting instrument (10) is arranged in the centering groove (22); An arc-shaped handle (37) is fixedly connected to the end surface of the first centering plate (20) away from the second centering plate (21).

6. A round tube straightness measuring and detecting device according to claim 5, characterized in that: The bevel gear mechanism (17) comprises a bevel gear 1 (23), a bevel gear 2 (24), and a bevel gear 3 (25); the support platform (11) is fixedly connected with a support vertical plate 1 (26) and a support vertical plate 2 (27); the bevel gear 1 (23) is coaxially fixedly connected with a connecting shaft (28) rotatably connected to the support vertical plate 1 (26); the connecting shaft (28) is concentric with the circular tube; two ends of the connecting shaft (28) respectively pass through the bevel gear 1 (23) and the bevel gear 3 (25); the bevel gear 2 (24) is meshed with the bevel gear 1 (23); the bevel gear 2 (24) is rotatably connected with the support vertical plate 2 (27); the bevel gear 3 (25) is meshed with the bevel gear 2 (24); the bevel gear 3 (25) is coaxially rotatably sleeved on the connecting shaft (28); The connecting plate 1 (18) is fixedly connected to the bevel gear 1 (23), and the connecting plate 2 (19) is fixedly connected to the bevel gear 3 (25).

7. A round tube straightness measuring and detecting device according to claim 6, characterized in that: The translational circular tube fixing mechanism (6) comprises an end pressure plate (29) and a pushing member (30). The end pressure plate (29) is fitted to the end of the circular tube. One end of the pushing member (30) is coaxially connected to the end of the end pressure plate (29) away from the circular tube, and the other end is coaxially fixedly connected to the connecting shaft (28). The pushing member (30) is fixedly connected to the support platform (11).

8. The device for measuring and detecting the straightness of a round tube according to claim 7, characterized in that: The pushing member (30) comprises a fixed vertical plate (31), a threaded sleeve (32), a threaded rod (33), and a guide mechanism (34); the fixed vertical plate (31) is fixedly connected to the support platform (11); the threaded sleeve (32) movably passes through the fixed vertical plate (31) and is rotatably connected to the end pressure plate (29); one end of the threaded rod (33) is coaxially fixedly connected to the connecting shaft (28), and the other end is threadedly connected to the threaded sleeve (32); the guide mechanism (34) is fixedly connected to the threaded sleeve (32) and movably passes through the fixed vertical plate (31).

9. A round tube straightness measuring and detecting device according to claim 8, characterized in that: The guide mechanism (34) comprises a connecting block (35) and a guide rod (36); the connecting block (35) is fixedly connected to the threaded sleeve (32); the guide rod (36) is fixedly connected to the connecting block (35); and the guide rod (36) movably passes through the fixed vertical plate (31).

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