Three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars

Abstract

The utility model relates to the technical field of ultrasonic automatic flaw detection, in particular to a three-centering clamping transmission mechanism for ultrasonic flaw detection of tubes and bars. The device comprises a three-centering main body box body, wherein the box body is provided with a clamping device and a transmission device. The clamping device comprises a clamping driving assembly, a power transmission assembly and a centering roller. The clamping driving assembly reciprocates to drive the three centering rollers to extend or contract, so that the three centering rollers simultaneously correct the concentricity of the pipe bar from the left upper direction, the right upper direction and the lower direction; and meanwhile, the transmission device provides power to drive the three centering rollers to rotate and drive the pipe bar penetrating through the central hole to be conveyed forwards.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic automatic flaw detection, in particular to a three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars. Background Art

[0002] Pipes and bars are generally made from forging raw materials through stretching or extrusion through dies, which are prone to damage, affecting the quality of finished safety parts. With the development of society, various industries pay more and more attention to safety parts, and safety parts flaw detection has become an indispensable key process.

[0003] At present, in the industry, the pipes and bars are mainly transported into the flaw detector using V-shaped rollers and V-shaped pressure wheels, and the pipes and bars can only be clamped in the upper and lower directions to correct the concentricity. For example, the Chinese patent with the announcement number CN206740700U, a pipe and bar clamping drive device, records the use of V-shaped wheels to drive the pipes and bars to run in a straight line, and a pressure wheel is also installed in the upper part of the device body. The pressure wheel is installed under the cylinder. The pressure wheel is used to cooperate with the V-shaped wheel to clamp the pipe and bar, and a two-way centering clamping method is also adopted.

[0004] However, as the length of the tube and bar increases, the straightness decreases. The correction of the concentricity in two directions still cannot make the tube and bar be in a position concentric with the guide sleeve of the flaw detection host, resulting in the tube and bar being unable to pass through the flaw detection host smoothly, affecting the flaw detection effect. In order to solve similar problems, the patent CN206740700U continues to disclose the use of three-direction positioning to achieve clamping together, but another set of structures needs to be set up, including hand wheels, screw rods, nuts, contact shafts, rollers, pressure plates, clamping rollers, plug-ins, etc. to achieve the expansion or contraction of the tube and bar.

[0005] In short, the prior art generally adopts a solution of combining conveying with 2-way centering, or a solution of conveying with 3-way centering, and it is difficult to realize a solution of simultaneous 3-way clamping and transmission. In view of the shortcomings of the prior art, the utility model designs a three-centering clamping mechanism that can correct the concentricity from the upper left, upper right and lower directions and can convey the tube and bar at the same time, wherein the three centering rollers can play both the role of concentricity correction and the role of conveying. Utility Model Content

[0006] The utility model aims to provide a three-centering clamping mechanism for ultrasonic flaw detection tubes and bars to solve the problems existing in the prior art.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a three-centering main body box is provided with a clamping device and a transmission device; the clamping device includes a clamping drive assembly, a power transmission assembly and a centering roller; the three-centering main body box is provided with a vertical plate, a clamping drive assembly is installed on one side of the vertical plate, and three sets of power transmission assemblies and three centering rollers are installed on the other side. A central hole for the passage of pipes and rods is provided in the middle of the vertical plate, and three centering rollers are arranged around the central hole; the reciprocating motion of the clamping drive assembly drives the three centering rollers to extend or contract, so that the three clamping centering rollers simultaneously correct the concentricity of the pipes and rods from three directions: upper left, upper right and below; at the same time, the transmission device provides power to drive the three centering rollers to rotate, thereby driving the pipes and rods passing through the central hole to be conveyed forward.

[0008] Furthermore, the clamping drive assembly includes a cylinder, a rack, three small gears, and one large gear: the large gear is installed coaxially with the central hole, and the three small gears are distributed at the upper left, upper right and bottom of the large gear at 120° to each other, and are meshed with the large gear; the rack is meshed with one of the small gears; the cylinder drives the rack to reciprocate, thereby driving the meshed small gear to rotate forward or reverse, and the meshed small gear then drives the large gear to rotate forward or reverse, and the large gear then drives the other two small gears to rotate forward or reverse.

[0009] Furthermore, each set of the power transmission components includes a transmission shaft box, a transmission box, a transmission shaft, a bevel gear and a centering roller shaft: one end of the transmission shaft box rotates in conjunction with the pinion, and the other end is connected to the transmission box; a transmission shaft is installed in the transmission shaft box, and a centering roller shaft is installed in the transmission box. The ends of the transmission shaft and the centering roller shaft are respectively connected to a bevel gear, and the two bevel gears are meshed to achieve steering; a centering roller is installed at the other end of the centering roller shaft; the three sets of power transmission components are driven by the pinion to expand or contract synchronously, thereby driving the three centering rollers to clamp or loosen the pipe and rod.

[0010] Furthermore, the transmission device includes a transmission motor, a synchronous belt, a driving wheel and three driven wheels: the driving wheel is installed on the output shaft of the transmission motor; the other end of the transmission shaft of the three sets of power transmission components extends out through the inner ring of the pinion, and the driven wheel is installed on the extended shaft end; the synchronous belt is arranged between the driving wheel and the driven wheel; the transmission motor drives the three driven wheels to move through the synchronous belt, thereby driving the power transmission component and the centering rollers to rotate in sequence, so that the three centering rollers can convey the pipe and rod forward after clamping the pipe and rod.

[0011] Furthermore, a tensioning assembly is provided on one side of the vertical plate close to the driven wheel.

[0012] Furthermore, a linear guide rail group is installed on the vertical plate of the three-centering main body box, and the rack is detachably installed on the linear guide rail. The cylinder drives the linear guide rail to move and drives the rack to move forward and backward.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] 1. The utility model cancels the conventional scheme of using a cylinder in combination with a V-shaped roller and a V-shaped pressure wheel to realize transmission and clamping. The clamping device and the transmission device act together on the centering roller, so that the centering roller can correct the concentricity of the pipe and rod from three directions: the upper left, the upper right and the lower side, and transport the pipe and rod at the same time.

[0015] 2. Aiming at the problem that it is becoming increasingly difficult for long and heavy tubes and bars to pass through the flaw detection host, the clamping device of the utility model can achieve the purpose of placing the tube and bar in a concentric position with the guide sleeve of the flaw detection host, so that the tube and bar can pass through the flaw detection host smoothly.

[0016] 3. The transmission device and power transmission components of the utility model are all arranged inside the main box body or the transmission box, with concealed installation, simple and beautiful appearance, simple disassembly and assembly, and convenient maintenance.

[0017] 4. The utility model eliminates the V-shaped roller, V-shaped pressure wheel and multiple clamping rollers used in the past technology, and only uses three centering rollers to achieve clamping and transmission functions. The structure is simpler and more practical, and the equipment cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 It is a three-center main box three-dimensional structure of the utility model. Figure 1 ;

[0020] Figure 2 It is a three-center main box three-dimensional structure of the utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the box structure of the utility model for installing the transmission device;

[0022] Figure 4 It is a schematic diagram of the overall structure of the power transmission assembly of the utility model;

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the power transmission component of the utility model.

[0024] In the figure, 1. three-centering main body box; 2. cylinder; 3. rack; 4. linear guide; 5. small gear; 6. large gear; 7. centering roller; 8. transmission shaft box; 9. transmission box; 10. transmission motor; 11. driving wheel; 12. synchronous belt; 13. tensioning assembly; 14. driven wheel; 15. transmission shaft; 16. bevel gear; 17. centering roller shaft. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0026] This embodiment provides a three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars, which changes the traditional two-way centering clamping and conveying into three-way centering clamping and conveying, effectively solving the problem that long and heavy tubes and bars have difficulty passing through the flaw detector.

[0027] like Figure 1-5 As shown, the three-centering clamping mechanism includes a three-centering main body box 1, in which a clamping device, a transmission device, and a vertical plate for installing each device are arranged. The clamping device is used to drive the three centering rollers 7 to extend or contract, so that the three clamping centering rollers 7 can simultaneously correct the concentricity of the pipe and rod from the upper left, upper right and lower directions. The transmission device is used to provide power to drive the three centering rollers 7 to rotate, and drive the pipe and rod passing through the central hole to be transported forward.

[0028] The clamping device includes a clamping drive assembly, a power transmission assembly and a centering roller 7. The clamping drive assembly is installed on one side of the vertical plate, and three sets of power transmission assemblies and three centering rollers 7 are installed on the other side. A central hole for the pipe and rod to pass through is provided in the middle of the vertical plate, and three centering rollers 7 are arranged around the central hole. The clamping drive assembly includes a cylinder 2, a rack 3, three pinions 5, and a large gear 6. The large gear 6 is installed on the same central axis as the central hole, and the three pinions 5 are distributed on the upper left, upper right and lower part of the large gear 6 at 120° to each other, and mesh with the large gear 6. The rack meshes with one of the pinions 5. The cylinder 2 drives the rack to reciprocate, thereby driving the meshed pinion 5 to rotate forward or reverse, and the meshed pinion 5 then drives the large gear 6 to rotate forward or reverse, and then the large gear 6 drives the other two pinions 5 to rotate forward or reverse. In order to facilitate the replacement and maintenance of the rack 3, 4 groups of linear guides are installed on the vertical plate of the three-centering main body box 1, and the rack is detachably installed on the linear guide 4 of the 4 groups of linear guides by bolts. The power transmission assembly includes a transmission shaft box 8, a transmission box 9, a transmission shaft 15, a bevel gear 16 and a centering roller shaft 17. One end of the transmission shaft box 8 rotates in conjunction with the pinion 5, and the other end is connected to the transmission box 9. A transmission shaft 15 is installed in the transmission shaft box 8, and a centering roller 7 shaft is installed in the transmission box 9. The ends of the transmission shaft 15 and the centering roller shaft 17 are respectively connected to a bevel gear 16, and the two bevel gears 16 are engaged to achieve steering. A centering roller 7 is installed at the other end of the centering roller shaft 17. The three sets of power transmission assemblies are driven by the pinion 5 to expand or contract synchronously, thereby driving the three centering rollers 7 to clamp or loosen the pipe and rod.

[0029] The transmission device includes a transmission motor 10, a synchronous belt 12, a driving wheel 11 and three driven wheels 14. The driving wheel 11 is installed on the output shaft of the transmission motor 10. The other end of the transmission shaft 15 of the three sets of power transmission components extends through the inner ring of the pinion 5, and the driven wheel 14 is installed on the extended shaft end. The synchronous belt 12 is sleeved between the driving wheel 11 and the driven wheel 14. The transmission motor 10 drives the three driven wheels 14 to move through the synchronous belt 12, thereby driving the power transmission component and the centering roller 7 to rotate in sequence, so that the three centering rollers 7 can convey the pipe rod forward after clamping the pipe rod. In order to ensure the tension of the synchronous belt 12, a tensioning assembly 13 is also provided on the side of the vertical plate close to the driven wheel 14. The tensioning assembly 13 includes a tensioning wheel, an adjusting bolt and a mounting block. The mounting block is fixed to the vertical plate, and a plurality of mounting holes are provided on the mounting block for mounting the tensioning wheel.

[0030] The operating principle of this embodiment is as follows:

[0031] Clamping process: Cylinder 2 pushes drive rack 3 forward through linear guide 4, drive rack 3 drives pinion 5 to rotate, pinion 5 drives large gear 6 to rotate, large gear 6 drives other two pinions 5 to rotate. As three pinions 5 rotate, three centering rollers 7 simultaneously shrink toward the center of the central hole from the upper left, upper right and lower directions, clamp the pipe and rod passing through the central hole, and correct its concentricity in three directions.

[0032] Transmission process: The transmission motor 10 drives the three driven wheels 14 installed on the transmission shaft 15 to rotate through the driving wheel 11 and the synchronous belt 12. After the bevel gear 16 changes direction, the three centering rollers 7 installed on the centering roller shaft 17 start to rotate, driving the pipes and rods passing through the central hole of the three centering bodies to be transported forward.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any mark in a claim should not be regarded as limiting the claim involved.

Claims

1. A three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars, comprising a three-centering main body box (1), characterized in that: The three-centering main body box (1) is provided with a clamping device and a transmission device; the clamping device comprises a clamping drive assembly, a power transmission assembly and a centering roller (7); the three-centering main body box (1) is provided with a vertical plate, one side of the vertical plate is provided with a clamping drive assembly, and the other side is provided with three sets of power transmission assemblies and three centering rollers (7); a central hole for the pipe and rod to pass through is provided in the middle of the vertical plate, and the three centering rollers (7) are arranged around the central hole; the clamping drive assembly reciprocates to drive the three centering rollers (7) to extend or contract, so that the three clamping centering rollers (7) simultaneously correct the concentricity of the pipe and rod from three directions: upper left, upper right and lower; at the same time, the transmission device provides power to drive the three centering rollers (7) to rotate, so as to drive the pipe and rod passing through the central hole to be transported forward.

2. The three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars according to claim 1 is characterized in that: The clamping drive assembly comprises a cylinder (2), a rack (3), three pinion gears (5), and a large gear (6): the large gear (6) is installed coaxially with the central hole; the three pinion gears (5) are distributed at the upper left, upper right, and lower part of the large gear (6) at an angle of 120 degrees to each other and mesh with the large gear (6); the rack meshes with one of the pinion gears (5); the cylinder (2) drives the rack (3) to reciprocate, thereby driving the meshed pinion gear (5) to rotate forward or reverse, and the meshed pinion gear (5) further drives the large gear (6) to rotate forward or reverse, and the large gear (6) further drives the other two pinion gears (5) to rotate forward or reverse.

3. The three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars according to claim 2 is characterized in that: Each set of the power transmission components comprises a transmission shaft box (8), a transmission box (9), a transmission shaft (15), a bevel gear (16) and a centering roller shaft (17): one end of the transmission shaft box (8) rotates in conjunction with the pinion gear (5), and the other end is connected to the transmission box (9); a transmission shaft (15) is installed in the transmission shaft box (8), and a centering roller shaft (17) is installed in the transmission box (9); the ends of the transmission shaft (15) and the centering roller shaft (17) are respectively connected to a bevel gear (16), and the two bevel gears (16) are meshed to achieve steering; a centering roller (7) is installed at the other end of the centering roller shaft (17); the three sets of power transmission components are driven by the pinion gear (5) to expand or contract synchronously, thereby driving the three centering rollers (7) to clamp or release the pipe or rod.

4. The three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars according to claim 3 is characterized in that: The transmission device comprises a transmission motor (10), a synchronous belt (12), a driving wheel (11) and three driven wheels (14): the driving wheel (11) is mounted on the output shaft of the transmission motor (10); the other ends of the transmission shafts (15) of the three sets of power transmission components extend through the inner ring of the pinion (5), and the driven wheels (14) are mounted on the extended shaft ends; the synchronous belt (12) is sleeved between the driving wheel (11) and the driven wheels (14); the transmission motor (10) drives the three driven wheels (14) to move through the synchronous belt (12), thereby driving the power transmission components and the centering rollers (7) to rotate in sequence, so that the three centering rollers (7) can convey the pipes and rods forward after clamping the pipes and rods.

5. The three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars according to claim 4 is characterized in that: A tensioning assembly (13) is also provided on one side of the vertical plate close to the driven wheel (14).

6. The three-centering clamping transmission mechanism for ultrasonic flaw detection tubes and bars according to claim 2 is characterized in that: A linear guide rail (4) group is installed on the vertical plate of the three-centering main body box (1), and the rack is detachably installed on the linear guide rail (4) of the linear guide rail (4) group. The cylinder (2) drives the linear guide rail (4) to move, thereby driving the rack (3) to move forward and backward.

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