Measuring device for measuring internal and external contours of pipe fitting

Abstract

The invention belongs to the technical field of pipe fitting production and measuring equipment, and provides a measuring device for measuring the internal and external profiles of a pipe fitting, the measuring device comprises a measuring table, a support, a 3D scanner and an X-axis adjusting motor, a supporting table is arranged in the middle of the measuring table, the supporting table is controlled by a Y-axis adjusting motor to overturn, and a plurality of clamping mechanisms are arranged on the side face of the supporting table. The clamping mechanism is controlled by a transmission rope, a spring, a rope winding rod and a clamping driving motor to complete clamping action, a square lifting opening is formed in the middle of the supporting table, a lifting table is arranged in the lifting opening, the lifting table is controlled by a lifting cylinder, a transmission plate and a lifting driving cylinder to complete lifting action, and a rotating opening is formed in the center of the lifting table. And a rotating table is arranged in the rotating opening, and the rotating table completes the rotating action through a rotating shaft, a gear set and a Z-axis adjusting motor. The device can automatically turn over the test piece, is high in comprehensive measurement capability, is high in automation degree, facilitates the improvement of the measurement efficiency, and is suitable for large-scale popularization.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe fitting production and measuring equipment, and in particular relates to a measuring device for measuring the inner and outer contours of a pipe fitting. Background Art

[0002] Pipe fittings are a general term for parts that play the role of connection, control, direction change, diversion, sealing, support, etc. in pipeline systems. Pipe fittings can be classified according to the connection method into: welded pipe fittings, threaded pipe fittings, necked butt-welded steel pipe flanges, ferrule pipe fittings, clamp pipe fittings, socket pipe fittings, adhesive pipe fittings, hot-melt pipe fittings, curved elastic double-melt pipe fittings and rubber ring connection pipe fittings. If the traditional method is used to measure pipe fittings, it is directly measured by contact measuring tools, which has the problem of low efficiency. 3D laser scanning measurement technology is a non-contact measurement technology with the advantages of high measurement accuracy, high measurement efficiency, avoidance of contact damage, wide measurement range, and high degree of digitization and visualization. Many workshops have begun to use 3D laser scanning equipment to complete measurement operations.

[0003] At present, 3D laser scanning equipment generally includes a projection unit and at least two camera units, such as the existing patent CN219181569U discloses a dual-projection 3D scanning camera that is easy to install, and the existing patent CN201811230078.7 discloses a structured light projection three-dimensional measurement system and method with automatic shadow compensation. Although this 3D scanning and measuring equipment can complete 3D measurement, it has certain deficiencies in viewing angle adjustment, requiring staff to adjust the projection direction or workers to manually adjust the placement angle of the test piece, and its automatic performance needs to be improved.

[0004] The existing patent CN202010641003.9 discloses a three-dimensional measurement device and measurement method based on binocular camera imaging and structured light technology. The equipment has lifting and rotation adjustment functions, which can improve the comprehensiveness of the measurement, but it lacks the function of turning over the pipe fittings, especially the hidden nature of the internal contours of some pipe fittings in different orientations, which will result in the final collected data being insufficient to support the complete data of the entire specimen. Therefore, in many cases, the operator is required to participate in the measurement process throughout, and even requires increasing the number of measurements of a single piece to further improve the comprehensiveness of the measurement. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned 3D measuring equipment, the present invention proposes a measuring device for measuring the inner and outer contours of pipe fittings, which has a reasonable design, can automatically turn over the test piece, has a strong comprehensive measurement capability, a high degree of automation and is conducive to improving measurement efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the present invention provides a measuring device for measuring the inner and outer contours of pipe fittings, including a measuring table, a bracket is arranged on the top of the measuring table and near the rear side thereof, a 3D scanner is arranged on the bracket, and the 3D scanner includes a projection unit and a camera unit, T-shaped flanges are arranged at both ends of the 3D scanner, a horizontal adjustment shaft is arranged at the center of the T-shaped flange, the adjustment shaft is supported and matched with the bracket, an X-axis adjustment motor is arranged at one end of the adjustment shaft, a mounting opening is arranged in the middle of the measuring table, a support table is arranged in the mounting opening, a pair of flipping shafts are arranged on the side of the support table, a Y-axis adjustment motor is arranged on the end of the flipping shaft, a plurality of flower openings are arranged on the side of the support table, a key-shaped hole inclined upward is arranged in the flower opening, A clamping mechanism that moves along the flower mouth and the key-shaped hole is provided in the flower mouth, all of the clamping mechanisms are connected by a transmission rope, and a spring that cooperates with the transmission rope sleeve is provided between adjacent clamping mechanisms, a rope winding rod is provided at the power end of the transmission rope, and the rope winding rod is provided below the support platform and connected to the measuring platform, a clamping drive motor is provided at one end of the rope winding rod, a square lifting opening is provided in the middle of the support platform, a lifting platform is provided in the lifting opening, a lifting cylinder is provided at the bottom of the lifting platform, a transmission plate is provided at the bottom of the lifting cylinder, lifting drive cylinders are provided at both ends of the transmission plate, a rotating opening is provided in the center of the lifting platform, a rotating platform is provided in the rotating opening, a rotating shaft is provided at the bottom of the rotating platform, a gear set is provided at the bottom of the rotating shaft, and a Z-axis adjustment motor is provided at the power input end of the gear set.

[0007] Preferably, the clamping mechanism includes a top clamping plate matching the shape of the flower mouth, a vertically extending side plate is provided at one end of the top clamping plate away from the center of the support platform, a rib clamping plate is provided at the transition position between the side plate and the top clamping plate, a sliding shaft head matching the key-shaped hole is provided on the side of the side plate, two transmission tubes spaced apart vertically are provided on the outer side of the side plate, the transmission tubes are used to connect the transmission rope, a bottom clamping plate is provided on the inner side of the side plate and near the bottom thereof, the bottom clamping plate extends toward the sliding direction of the clamping mechanism and its radial length is greater than the radial length of the top clamping plate.

[0008] Preferably, a plurality of push rods corresponding to the clamping mechanism are provided at the bottom of the support platform, the bottom surface of the push rods is an inclined surface and contacts and cooperates with the extended surface of the bottom clamping plate, and the bottom clamping plate is an elastic plate.

[0009] Preferably, the width of the side plate is smaller than the minimum width of the flower mouth.

[0010] Preferably, a pair of fin plates are provided at both sides of the bottom of the flower mouth, and the key-shaped holes are provided on the fin plates.

[0011] Preferably, the number of the clamping mechanisms is 12 and they are evenly divided into four groups, and each group of clamping mechanisms corresponds to one side of the lifting opening.

[0012] Preferably, the lifting platform is a groove-shaped structure with an opening facing downward, and the lifting platform is provided with radiation openings corresponding to the clamping mechanisms one by one, and the radiation openings allow the bottom clamping plate to slide through the supporting surface of the lifting platform from bottom to top.

[0013] Preferably, a pair of hollow fork rods are provided on the side of the support platform, and the fork rods are provided with transmission holes for the transmission rope to pass through, and one of the fork rods is connected to the Y-axis adjustment motor.

[0014] Preferably, the gear group includes a driven gear, which is arranged below the lifting cylinder. A support spring connected to the inner bottom of the measuring platform is arranged below the driven gear. A transition gear column is arranged on the transmission side of the driven gear. The height of the transition gear column is greater than the driving stroke of the lifting drive cylinder. A driving gear meshing with the transition gear column is arranged on the transmission side of the transition gear column, and the power input end of the driving gear is connected to the Z-axis adjustment motor.

[0015] Preferably, two pairs of bearing seats are provided on the bracket, and ball bearings cooperating with the adjusting shaft are provided inside the bearing seats.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] The present invention provides a measuring device for measuring the inner and outer contours of pipe fittings. The pipe fitting test piece is placed at the center of a support table. The scanning angle of the 3D scanner is controlled by an X-axis adjustment motor to perform multi-angle measurement on the pipe fitting. The gear set, the rotating shaft and the rotating table are driven by a Z-axis adjustment motor to enable the pipe fitting to rotate on its own, thereby increasing the scanning range of the 3D scanner. The pipe fitting can be clamped by a clamping mechanism. After the lifting table is lowered to a certain height by a lifting drive cylinder, the clamping mechanism is controlled by a Y-axis adjustment motor to turn the pipe fitting over and place it on the lifting table. After the clamping mechanism and the lifting table are reset, the measurement operation can be continued, thereby further increasing the comprehensiveness of the measurement data. Therefore, the device can automatically turn over the test piece, has a strong comprehensive measurement capability, a high degree of automation and is conducive to improving measurement efficiency, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1An axonometric diagram of a measuring device for measuring the inner and outer contours of a pipe fitting provided in an embodiment;

[0020] Figure 2 A front view of a measuring device for measuring the inner and outer contours of a pipe provided in an embodiment;

[0021] Figure 3 A side view of a measuring device for measuring the inner and outer profiles of a pipe provided in an embodiment;

[0022] Figure 4 for Figure 2 A cross-sectional view of a measuring device for measuring the inner and outer contours of a pipe fitting in the HH direction;

[0023] Figure 5 A front view of a clamping mechanism provided in an embodiment;

[0024] Figure 6 A three-dimensional diagram of a clamping mechanism provided in an embodiment;

[0025] Figure 7 It is a stereoscopic diagram of a measuring device for measuring the inner and outer contours of a pipe fitting in its original state;

[0026] Figure 8 It is a front view of a measuring device for measuring the inner and outer contours of a pipe fitting in its original state;

[0027] Fig. 9 A diagram of a measuring device for measuring the inner and outer contours of a pipe fitting in a clamping operation state in preparation for turning over;

[0028] Fig.10 It is a schematic diagram of a measuring device for measuring the inner and outer contours of a pipe fitting after the test piece is turned over;

[0029] Fig.11 A perspective view of a transmission rope provided for an embodiment;

[0030] In the above figures:

[0031] 1. Measuring table; 2. Bracket; 3. 3D scanner; 31. Projection unit; 32. Camera unit; 33. T-flange; 4. X-axis adjustment motor; 5. Support table; 51. Flip axis; 52. Flower mouth; 53. Key hole; 54. Lifting mouth; 55. Wing plate; 56. Fork rod; 6. Y-axis adjustment motor; 7. Clamping mechanism; 71. Top clamping plate; 72. Side plate; 73. Rib clamping plate; 74. Sliding shaft head; 75. Transmission tube; 76 , bottom clamping plate; 77, top rod; 8, transmission rope; 9, spring; 10, rope winding rod; 11, clamping drive motor; 12, lifting platform; 121, radiation port; 13, lifting cylinder; 14, transmission plate; 15, lifting drive cylinder; 16, rotating port; 17, rotating platform; 18, rotating shaft; 19, gear set; 191, driven gear; 192, transition gear column; 193, driving gear; 20, Z-axis adjustment motor; 21, supporting spring. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0034] Examples, such as Figure 1-Figure 11As shown, the present invention provides a measuring device for measuring the inner and outer contours of a pipe fitting, comprising a measuring table 1, a bracket 2 is arranged on the top of the measuring table 1 and near the rear side thereof, a 3D scanner 3 is arranged on the bracket 2, the 3D scanner 3 comprises a projection unit 31 and a camera unit 32, and a transmission terminal of the 3D scanner 3 is provided with a computer with a display screen, and the computer performs corresponding image processing and data calculation operations on the scanned data. Furthermore, the present invention provides a 3D scanner 3 with T-shaped flanges 33 at both ends, a horizontal adjustment shaft is provided at the center of the T-shaped flange 33, the adjustment shaft is supported and matched with the bracket 2, an X-axis adjustment motor 4 is provided at one end of the adjustment shaft, a mounting opening is provided in the middle of the measuring table 1, a support table 5 is provided in the mounting opening, a pair of flip shafts 51 are provided on the side of the support table 5, a Y-axis adjustment motor 6 is provided at the end of the flip shaft 51, a plurality of flower openings 52 are provided on the side of the support table 5, a key-shaped hole 53 inclined upward is provided in the flower opening 52, a clamping mechanism 7 that moves along the flower opening 52 and the key-shaped hole 53 is provided in the flower opening 52, all of the clamping mechanisms 7 are connected by a transmission rope 8, and a spring 9 that is sleeved and matched with the transmission rope 8 is provided between adjacent clamping mechanisms 7, and the spring 8 is used for the clamping mechanism 7 caliber recovery accumulates recovery potential energy and has a certain buffering effect. The power end of the transmission rope 8 is provided with a rope rod 10, which is arranged below the support platform 5 and connected to the measuring platform 1. One end of the rope rod 10 is provided with a clamping drive motor 11. A square lifting port 54 is provided in the middle of the support platform 5. A lifting platform 12 is provided in the lifting port 54. A lifting cylinder 13 is provided at the bottom of the lifting platform 12. A transmission plate 14 is provided at the bottom of the lifting cylinder 13. Lifting drive cylinders 15 are provided at both ends of the transmission plate 14. A rotating port 16 is provided at the center of the lifting platform 12. A rotating platform 17 is provided in the rotating port 16. A rotating shaft 18 is provided at the bottom of the rotating platform 17. A gear set 19 is provided at the bottom of the rotating shaft 18. A Z-axis adjustment motor 20 is provided at the power input end of the gear set 19. If the clamping mechanism 7 is kept in the original position, its top surface just compensates for the flower port 52, so the measuring platform 1 maintains a relatively complete support surface, which is conducive to reducing the error of 3D projection measurement.

[0035] Specifically, the support platform 5, the lifting platform 12 and the rotating platform 17 are all in direct contact with the pipe test piece, the maximum plane of the pipe is smaller than the horizontal area of ​​the lifting port 54, and the center of gravity of the pipe falls on the rotating platform 17, so the pipe can be carried by the lifting platform 12 to move from bottom to top, and the rotating platform 17 is used to meet the self-rotation requirements of the pipe. More specifically, the pipe test piece is placed at the center of the support platform 5, and the scanning angle of the 3D scanner 3 can be controlled by the X-axis adjustment motor 4 to measure the pipe at multiple angles; the gear set 19, the rotating shaft 18 and the rotating platform 17 driven by the Z-axis adjustment motor 20 can make the pipe rotate, thereby increasing the scanning range of the 3D scanner 3.

[0036] The mechanical action for automatically turning over the pipe fitting is as follows: the clamping drive motor 11 is used to drive the rope winding rod 10 to rotate to control the working length of the transmission rope 8, thereby controlling the clamping diameter formed by all the clamping mechanisms 7. While the diameters of all the clamping mechanisms 7 change, a single clamping mechanism 7 can move along the path provided by the key hole 53 and the flower mouth 52 to obtain a corresponding opening to limit the free movement of the pipe fitting; in this way, the clamping mechanism 7 can clamp the pipe fitting, and the lifting platform 12 is controlled by the lifting drive cylinder 15 to descend to a certain height, and the lifting platform 12 and the rotating platform 17 are simultaneously When the pipe is turned over, it leaves the supporting plane of the pipe, and the Y-axis adjustment motor 6 controls the clamping mechanism 7 to flip, so that the pipe is turned over. After the clamping mechanism 7 is released, the turned pipe falls steadily on the lifting platform 12, the clamping mechanism 7 is reset, and the lifting platform 12 is also raised and kept horizontally aligned with the support platform 5. The test piece is displayed on the measuring table 1 with a new test surface, and the measurement operation can be continued, further increasing the comprehensiveness of the measurement data. Therefore, the equipment can automatically flip the test piece, has a strong comprehensive measurement capability, and a high degree of automation, which is conducive to improving the measurement efficiency and has a high comprehensive utilization rate.

[0037] like Figure 4 -As shown in the figure, the clamping mechanism 7 includes a top clamping plate 71 that matches the shape of the flower mouth 52. The top clamping plate 71 is provided with a vertically extending side plate 72 at one end away from the center of the support platform 5. A rib clamping plate 73 is provided at the transition position between the side plate 72 and the top clamping plate 71. The side of the side plate 72 is provided with a sliding shaft head 74 that matches the key-shaped hole 53. The outer side of the side plate 72 is provided with two transmission tubes 75 that are spaced apart up and down. The transmission tube 75 is used to connect the transmission rope 8. The inner side of the side plate 72 and near its bottom is provided with a bottom clamping plate 76. The bottom clamping plate 76 extends in the sliding direction of the clamping mechanism 7 and its radial length is greater than the radial length of the top clamping plate 71. Among them, the two transmission tubes 75 on the side plate 72 can provide the transmission rope 8 with at least one circle of the transmission path connection, such as Fig.11 As shown, on the second transmission path, the transmission rope 8 may not completely pass through all the transmission tubes 75, but may be connected downward from the transmission tube 75 near the rope winding rod 10 to the rope winding rod 10, so as to satisfy the synchronous control effect of the rope winding rod 10 on both ends of the transmission rope 8. The side plate 72 not only provides a transmission node for the transmission tube 75 and the transmission rope 8, but also provides a basic clamping distance for the top clamping plate 71 and the bottom clamping plate 76; when the clamping mechanism 7 moves along the flower mouth 52 and the key-shaped hole 53, the bottom clamping plate 76 may contact the pipe fitting from below, while the top clamping plate 71 and the rib clamping plate 73 respectively limit the range of movement of the pipe fitting from above and from the side, thereby limiting the free movement of the pipe fitting, thereby ensuring the clamping effect of the device before the pipe fitting is ready to be turned over, which is conducive to improving the stability of the subsequent turning action.

[0038] like Figure 4As shown, the bottom of the support platform 5 is provided with a plurality of top rods 77 corresponding to the clamping mechanism 7, the bottom surface of the top rod 77 is an inclined surface and contacts and cooperates with the extended surface of the bottom clamping plate 76, and the bottom clamping plate 76 is an elastic plate. In this way, when the clamping mechanism 7 is in the original position, the opening of the top clamping plate 71 and the bottom clamping plate 76 can be kept small to improve its integrity with the support platform 5 and the concealment of the bottom clamping plate 76 under the support platform 5; when the clamping mechanism 7 moves along the flower mouth 52 and the key-shaped hole 53, the bottom clamping plate 76 can be gradually opened under the sliding braking action of the top rod 77, and the top clamping plate 71 and the bottom clamping plate 76 have corresponding openings, and the bottom clamping plate 76 can contact the bottom of the pipe to be tested in advance, and contact the support of the lifting platform 12 and the rotating platform 17 for the pipe to be tested.

[0039] In order to prevent the clamping diameter of the clamping mechanism 7 from being stuck at the waist of the flower mouth 52 during the controlled contraction process, the width of the side plate 72 is designed to be smaller than the minimum width of the flower mouth 52, so that the side plate 72 can flexibly pass through the maximum radial position and the minimum radial position of the flower mouth 52, thereby ensuring that the clamping mechanism 7 has a clamping ability that meets the clamping requirements for the pipe fitting.

[0040] In order to meet the clamping requirements of the clamping mechanism 7 for the pipe fitting, a pair of fin plates 55 are provided on both sides of the bottom of the flower mouth 52 provided by the present invention, and the key-shaped hole 53 is provided on the fin plates 55. The fin plates 55 provide a certain extension length, so that the key-shaped hole 53 has a longer length to meet the rising height and radial translation length of the clamping mechanism 7, so that all the clamping mechanisms 7 can obtain sufficient clamping height and clamping caliber when they are retracted to a certain extent; in addition, after the clamping mechanism 7 returns to its original position, the top surface of the top clamping plate 71 can remain flush with the surface of the support platform 5, reducing unnecessary interference for the 3D scanner 3 to obtain the internal and external contour data of the pipe fitting.

[0041] Furthermore, the number of the clamping mechanisms 7 provided by the present invention is 12 and they are evenly divided into four groups. Each group of clamping mechanisms 7 corresponds radially to one side of the lifting port 54. The 12 clamping mechanisms 7 not only have more clamping restriction nodes to clamp the pipe test pieces, but also after 4 groups, every three clamping mechanisms 7 can maintain a good coordination relationship in space. Especially considering the square design of the lifting platform 12, such a grouping design can improve the space utilization rate of all clamping mechanisms 7; when the clamping mechanisms 7 of adjacent groups are shrunk to the minimum clamping diameter, the adjacent top clamping plates 71 basically contact each other to fully limit the free movable surface of the pipe, thereby ensuring the clamping quality of the equipment for the pipe to be tested.

[0042] like Figure 4 , Fig. 9 and Fig.10As shown, the lifting platform 12 is a groove-shaped structure with an opening facing downward, and the lifting platform 12 is provided with radial openings 121 corresponding to the clamping mechanisms 7 one by one. The radial openings 121 are narrow and slightly larger than the width of the bottom clamping plate, and the radial openings 121 allow the bottom clamping plate 76 to slide from bottom to top through the supporting surface of the lifting platform 12. The radial openings 121 provided on the lifting platform 12 can provide a structural condition for the bottom clamping plate 76 to contact the pipe fittings in advance, which is conducive to releasing the supporting relationship of the lifting platform 12 to the pipe fittings in advance, and is convenient for lowering the lifting platform 12 to a reasonable position before turning over the pipe fittings, so as to give sufficient rotation space to the clamping mechanism 7 and the entire support platform 5.

[0043] In order to improve the spatial coordination performance of the internal structure of the measuring platform 1, the present invention provides a pair of hollow fork rods 56 on the side of the support platform 5, and the fork rods 56 provide a flipping center, and the fork rods 56 are provided with a transmission hole for the transmission rope 8 to pass through, so that the rotation of the fork rods 56 and the entire support platform 5 will not excessively affect the actual working length of the transmission rope 8. In the process of the support platform 5 and the clamping mechanism 7 carrying the pipe to flip, the slight movement of the clamping diameter of the clamping mechanism 7 will not excessively affect the stability of the pipe; one of the fork rods 56 is connected to the flip shaft 51, and the Y-axis adjustment motor 6 is used to provide the flipping driving force for the flip shaft 51, the fork rod 56 and the support platform 5.

[0044] like Figure 4 and Figure 8 As shown, the gear set 19 includes a driven gear 191, which is arranged below the lifting cylinder 13, and a support spring 21 connected to the inner bottom of the measuring platform 1 is arranged below the driven gear 191. A transition gear column 192 is arranged on the transmission side of the driven gear 191, and the height of the transition gear column 192 is greater than the driving stroke of the lifting drive cylinder 15. A driving gear 193 meshing with the transition gear column 192 is arranged on the transmission side of the transition gear column 192, and the power input end of the driving gear 193 is connected to the Z-axis adjustment motor 20. Among them, the support spring 21 is used to ensure the stability of the driven gear 191 in the vertical direction, and the driven gear 191 can complete the lifting action under the joint drive of the transmission rod and the lifting cylinder 13, and the driven gear 191 always keeps meshing with the transition gear set 19 during the lifting process, so the gear set 19 always maintains a reliable and stable transmission path and transmission relationship, so that after the lifting platform 12 and the rotating platform 17 are reset, the Z-axis adjustment motor 20 can effectively control the angle of the pipe on its supported plane.

[0045] like Figure 1-Figure 3 As shown, two pairs of bearing seats are arranged on the bracket 2, and ball bearings cooperating with the adjustment shaft are arranged inside the bearing seats. The ball bearings can reduce the rotation resistance of the 3D scanner 3; the two pairs of bearing seats can provide different base heights, which can be used to complete multi-angle adjustment with a better base height when measuring different pipes, which is conducive to improving the comprehensive utilization rate of the equipment.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A measuring device for measuring the inner and outer contours of a pipe, comprising a measuring table, a bracket is arranged on the top of the measuring table and near the rear side thereof, a 3D scanner is arranged on the bracket, and the 3D scanner comprises a projection unit and a camera unit, characterized in that: Both ends of the 3D scanner are provided with T-shaped flanges, the center of the T-shaped flange is provided with a horizontal adjustment shaft, the adjustment shaft is supported and matched with the bracket, one end of the adjustment shaft is provided with an X-axis adjustment motor, the middle of the measuring table is provided with a mounting opening, a support table is provided in the mounting opening, a pair of flip shafts are provided on the side of the support table, a Y-axis adjustment motor is provided on the end of the flip shaft, a plurality of flower openings are provided on the side of the support table, a key-shaped hole inclined upward is provided in the flower opening, a clamping mechanism that moves along the flower opening and the key-shaped hole is provided in the flower opening, all the clamping mechanisms are connected by transmission ropes, and a transmission rope loop is provided between adjacent clamping mechanisms. A matching spring is provided, a rope winding rod is provided at the power end of the transmission rope, the rope winding rod is arranged below the support platform and connected to the measuring platform, a clamping drive motor is provided at one end of the rope winding rod, a square lifting opening is provided in the middle of the support platform, a lifting platform is provided in the lifting opening, a lifting cylinder is provided at the bottom of the lifting platform, a transmission plate is provided at the bottom of the lifting cylinder, lifting drive cylinders are provided at both ends of the transmission plate, a rotating opening is provided at the center of the lifting platform, a rotating platform is provided in the rotating opening, a rotating shaft is provided at the bottom of the rotating platform, a gear set is provided at the bottom of the rotating shaft, and a Z-axis adjustment motor is provided at the power input end of the gear set.

2. A measuring device for measuring the inner and outer contours of a pipe according to claim 1, characterized in that: The clamping mechanism includes a top clamping plate matching the shape of the flower mouth, a vertically extending side plate is provided at one end of the top clamping plate away from the center of the support platform, a rib clamping plate is provided at the transition position between the side plate and the top clamping plate, a sliding shaft head matching the key-shaped hole is provided on the side of the side plate, two transmission tubes spaced apart up and down are provided on the outer side of the side plate, the transmission tubes are used to connect the transmission rope, a bottom clamping plate is provided on the inner side of the side plate and near its bottom, the bottom clamping plate extends toward the sliding direction of the clamping mechanism and its radial length is greater than the radial length of the top clamping plate.

3. A measuring device for measuring the inner and outer contours of a pipe according to claim 2, characterized in that: The bottom of the support platform is provided with a plurality of push rods corresponding to the clamping mechanism. The bottom surface of the push rod is an inclined surface and contacts and cooperates with the extended surface of the bottom clamping plate. The bottom clamping plate is an elastic plate.

4. A measuring device for measuring the inner and outer contours of a pipe according to claim 3, characterized in that: The width of the side plate is smaller than the minimum width of the flower mouth.

5. A measuring device for measuring the inner and outer contours of a pipe according to claim 4, characterized in that: A pair of fin plates are arranged at both sides of the bottom of the flower mouth, and the key-shaped holes are arranged on the fin plates.

6. A measuring device for measuring the inner and outer contours of a pipe according to any one of claims 1 to 5, characterized in that: The number of the clamping mechanisms is 12 and they are evenly divided into four groups, and each group of clamping mechanisms corresponds to one side of the lifting opening.

7. A measuring device for measuring the inner and outer contours of a pipe according to claim 6, characterized in that: The lifting platform is a groove-shaped structure with an opening facing downwards. The lifting platform is provided with radiation openings corresponding to the clamping mechanisms one by one. The radiation openings allow the bottom clamping plate to slide through the supporting surface of the lifting platform from bottom to top.

8. A measuring device for measuring the inner and outer contours of a pipe according to claim 1, characterized in that: A pair of hollow fork rods are arranged on the side of the support platform, and the fork rods are provided with transmission holes for the transmission rope to pass through, and one of the fork rods is connected to the Y-axis adjustment motor in a transmission manner.

9. A measuring device for measuring the inner and outer contours of a pipe according to claim 1, characterized in that: The gear set includes a driven gear, which is arranged below the lifting cylinder. A supporting spring connected to the inner bottom of the measuring platform is arranged below the driven gear. A transition gear column is arranged on the transmission side of the driven gear. The height of the transition gear column is greater than the driving stroke of the lifting drive cylinder. A driving gear meshing with the transition gear column is arranged on the transmission side of the transition gear column. The power input end of the driving gear is connected to the Z-axis adjustment motor.

10. A measuring device for measuring the inner and outer contours of a pipe according to claim 1, characterized in that: Two pairs of bearing seats are arranged on the bracket, and ball bearings matched with the adjusting shaft are arranged inside the bearing seats.

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