A quartz glass tube wall thickness measuring device based on laser measurement

Abstract

The present invention relates to the field of quartz tube measurement technology and discloses a quartz glass tube wall thickness measurement device based on laser measurement, comprising a housing and a support assembly disposed on the housing, the housing comprising an upper shell and a lower shell disposed below the upper shell and integrally connected to the upper shell, the support assembly disposed in the gap between the upper and lower shells, and a laser detection assembly disposed at one end between the upper and lower shells; an upper rotating roller is rotatably disposed on the inner side of the upper shell, and a lower rotating roller is rotatably disposed on the inner side of the lower shell. The present invention can form a spiral trajectory covering the entire surface of the tube wall during measurement, performing three-dimensional scanning, and capturing the circumferential wall thickness distribution and axial taper changes in one go, significantly improving detection efficiency and data integrity. The quartz glass tube is stabilized by its own weight and the support of the rollers, making positioning simple, and can be automatically lowered and unloaded after detection, thereby improving detection continuity and efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of quartz tube measurement, and in particular to a quartz glass tube wall thickness measuring device based on laser measurement. Background Art

[0002] Quartz glass tubes are widely used in semiconductors, photovoltaics, optical communications, high-end lighting, and other fields due to their excellent optical properties, thermal stability, and chemical inertness. The uniformity and accuracy of their wall thickness are key parameters to ensure product performance, so accurate wall thickness measurement is crucial. Currently, non-contact laser measurement is the mainstream industrial method, mainly achieved through laser displacement sensors: sensors are arranged separately or in combination on the inside and outside of the quartz tube, and the position of the inner and outer walls at the laser beam projection point is measured using the laser triangulation principle or time-of-flight method. The local wall thickness value at that point is obtained by calculating the difference between the two.

[0003] However, existing laser measurement devices have certain limitations in application. First, their measurement method is usually based on a single point or a limited fixed point. A single measurement can only obtain the wall thickness information of the quartz tube in the circumferential direction and a specific axial position. It is difficult to fully reflect the uniformity of the overall wall thickness distribution of the tube and cannot effectively identify locally too thin or too thick areas; second, in order to achieve accurate measurement, the quartz tube often needs to be precisely positioned and clamped before testing, and may need to be disassembled after testing. These auxiliary operation steps not only increase the complexity of testing, but also seriously damage the continuity of the testing process. Therefore, in batch testing scenarios, frequent positioning, clamping and disassembly operations significantly reduce the overall testing efficiency, becoming a bottleneck restricting the improvement of the production line automation level. A more efficient and comprehensive online measurement solution is urgently needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing technology has the disadvantages of single measuring point and low measurement efficiency. For this reason, we propose a quartz glass tube wall thickness measuring device based on laser measurement.

[0005] To achieve the above objectives, the present application adopts the following technical solution: a quartz glass tube wall thickness measuring device based on laser measurement, comprising a housing and a support assembly disposed on the housing, the housing comprising an upper shell and a lower shell disposed below the upper shell and integrally connected to the upper shell, the support assembly being disposed in a gap between the upper shell and the lower shell, and a laser detection assembly being disposed at one end between the upper shell and the lower shell;

[0006] The laser detection assembly includes a detection frame arranged at one end between the upper shell and the lower shell, a screw rod is rotatably arranged on the detection frame, a movable frame is threadedly connected to the screw rod, and coaxial micro laser sensors are arranged on the upper and lower sides of one end of the movable frame;

[0007] The support assembly includes a pair of drive shafts disposed between the upper shell and the lower shell, the drive shafts being provided with rollers, the ends of the drive shafts being rotatably provided with swing arms, the upper ends of the swing arms being fixed with swing shafts rotatably connected to the inner wall of the end of the shell, and one of the swing arms being provided with a driving mechanism for driving the screw rod and the drive shaft to rotate;

[0008] An upper roller is rotatably provided inside the upper shell, and a lower roller is rotatably provided inside the lower shell. The peripheries of the upper and lower rollers are both provided with accommodating grooves, and one end of the lower roller is linked with a linkage mechanism for driving the swing shaft to rotate.

[0009] Preferably, the driving mechanism includes a third gear arranged at one end of the screw rod, and one of the swing arms corresponding to the detection frame is a hollow structure. Sprockets are rotatably arranged at both ends of the inner side of the swing arm, and a synchronous chain is engaged with the two sprockets. A second driving source for driving the sprocket to rotate is provided on one side of the swing arm, and the driving shaft corresponding to the swing arm is coaxially arranged with one of the sprockets, and a fourth gear extending to the outside of the swing arm and corresponding to the third gear is provided on one side of the sprocket at the upper end.

[0010] Preferably, one end of the movable frame passes through one end of the detection frame and cooperates with the movable guide of the detection frame, and the movable direction of the movable frame is parallel to the axis of the driving shaft.

[0011] Preferably, the linkage mechanism includes a first gear arranged at one end of the swing shaft, a lifting frame located between the two swing shafts at the same end is vertically movably provided on the inner wall of the end portion of the shell, racks meshing with the first gear are provided on both sides of the upper end of the lifting frame, a linkage ring is fixed to the outer side of the end portion of the lower rotating roller, the outer side wall of the linkage ring is evenly provided with an arc-shaped outer groove, the inner side wall of the linkage ring is evenly provided with an arc-shaped inner groove spaced apart from the outer groove, and the ends of adjacent outer grooves and inner grooves are connected by a connecting groove, and the lower end side wall of the lifting frame is provided with a guide member that cooperates with the outer groove, inner groove and connecting groove for movable guidance.

[0012] Preferably, the guide member is cylindrical and rotatably arranged on the side wall of the lower end of the lifting frame.

[0013] Preferably, the inner wall of the end portion of the shell is provided with a support plate corresponding to the swing arm one-to-one and used to support the bottom of the swing arm, and the support plate is arranged at an angle.

[0014] Preferably, a fixing frame located above the lifting frame is provided on the inner wall of the end portion of the shell, and an elastic member is provided between the fixing frame and the lifting frame.

[0015] Preferably, the tops of the upper ends of the upper shell and the lower shell are both provided with inlets, the bottoms of the upper shell and the lower shell are both provided with outlets, and the inlets and the outlets both correspond to the accommodating slots.

[0016] Preferably, the end of the driving shaft is provided with a limiting plate having a diameter larger than that of the roller and used to limit the position of the quartz glass tube.

[0017] Preferably, a gear drive assembly for driving the upper roller and the lower roller to rotate alternately is provided at the end of the housing.

[0018] Technical effects and advantages of the present invention:

[0019] In the present invention, through the mutual cooperation of the support assembly, laser detection assembly, drive mechanism, linkage mechanism, rotatable upper roller, lower roller and receiving groove, the measurement points can be made to cover the entire surface of the tube wall in a spiral trajectory during measurement, and three-dimensional scanning can be captured at one time, thereby significantly improving the detection efficiency and data integrity. The quartz glass tube is stabilized by its own weight and the support of the roller, and is synchronously driven to rotate by the roller, which makes positioning simple. After detection, the linkage mechanism is linked to the rotation of the lower roller to realize automatic dropping and unloading of the quartz glass tube, thereby improving the continuity and efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components:

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 A structural diagram of another perspective of the present invention;

[0023] Figure 3 This is a schematic structural diagram of the present invention with the upper shell, lower shell, upper rotating roller, and lower rotating roller disassembled;

[0024] Figure 4 For the present invention Figure 3 A structural diagram from another perspective based on the above;

[0025] Figure 5 This is a structural diagram of the present invention in which the lower roller, linkage ring, and drive shaft are in a coordinated state;

[0026] Figure 6 This is a schematic structural diagram of the linkage ring and the lifting frame at the end of the drive shaft of the present invention in a disassembled state;

[0027] Figure 7 This is a schematic diagram of the structure of the lifting frame and the end of the drive shaft of the present invention in a separated state;

[0028] Figure 8 This is a schematic structural diagram of the fourth gear, the third gear and the corresponding swing arm of the present invention in a disassembled state;

[0029] Figure 9 This is a schematic structural diagram of the second gear, incomplete gear, locking plate, and locking arc of the present invention in a disassembled state.

[0030] Legend: 1. Upper shell; 2. Lower shell; 3. Discharge port; 4. Inlet; 5. Rack; 6. Swing arm; 7. Support plate; 8. Swing shaft; 9. Lifting frame; 10. Drive shaft; 11. First gear; 12. First drive source; 13. Upper roller; 14. Lower roller; 15. Accommodating groove; 16. Linkage ring; 17. Roller; 18. Second gear; 19. Incomplete gear; 20. Roller; 21. Limiting piece; 22. Detection frame; 23. Outer groove; 24. Inner groove; 25. Connecting groove; 26. Fixed frame; 27. Pin; 28. Elastic member; 29. ​​Guide member; 30. Second drive source; 31. Screw; 32. Moving frame; 33. Micro laser sensor; 34. Third gear; 35. Fourth gear; 36. Synchronous chain; 37. Sprocket; 38. Locking plate; 39. Locking arc. DETAILED DESCRIPTION

[0031] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0032] Reference Figures 1-8 As shown, a quartz glass tube wall thickness measuring device based on laser measurement includes a housing and a support assembly disposed on the housing. The housing includes an upper shell 1 and a lower shell 2 disposed below the upper shell 1 and integrally connected to the upper shell 1. The upper shell 1 and the lower shell 2 are both cylindrical with closed ends. The support assembly is disposed in the gap between the upper shell 1 and the lower shell 2, and a laser detection assembly is disposed at one end between the upper shell 1 and the lower shell 2.

[0033] As a preferred embodiment, the laser detection assembly includes a detection frame 22 installed at one end between the upper shell 1 and the lower shell 2. A screw rod 31 is rotatably provided on the detection frame 22 through a bearing. A movable frame 32 is threadedly connected to the screw rod 31. One end of the movable frame 32 passes through one end of the detection frame 22 and is movable and guided with the detection frame 22 through a linear bearing. The movable direction of the movable frame 32 is parallel to the axis of the drive shaft 10. Coaxial micro laser sensors 33 are provided on the upper and lower sides of one end of the movable frame 32.

[0034] As a preferred embodiment, the support assembly includes a pair of drive shafts 10 arranged between the upper shell 1 and the lower shell 2, and a plurality of rollers 20 for supporting the quartz glass tube are provided on the drive shaft 10. The end of the drive shaft 10 is provided with a limit plate 21 with a diameter larger than the roller 20 and used to limit the quartz glass tube. The limit plate 21 is used to limit the end of the quartz glass tube to avoid axial displacement. The end of the drive shaft 10 is provided with a swing arm 6, and the drive shaft 10 and the swing arm 6 are rotatably connected. The upper end of the swing arm 6 is fixed to the swing shaft 8, and the other end of the swing shaft 8 is connected to the swing arm 6. The inner wall of the end of the shell is rotatably connected, and the specific position is the inner wall of the end where the upper shell 1 and the lower shell 2 are connected. A driving mechanism for driving the screw 31 and the drive shaft 10 to rotate is provided on one of the swing arms 6. The driving mechanism includes a third gear 34 provided at one end of the screw 31. One of the swing arms 6 corresponding to the detection frame 22 is a hollow structure. Both ends of the inner side of the hollow swing arm 6 are rotatably provided with a sprocket 37. The two sprockets 37 are engaged with a synchronous chain 36. The synchronous chain 36 and the sprocket 37 can also be replaced by a synchronous belt and a synchronous wheel. A second driving source 30 for driving the sprocket 37 to rotate is provided on one side of the arm 6. The second driving source 30 is a double-shaft motor or a single-shaft motor. If it is a single-shaft motor, the motor is arranged at the lower end of one side of the hollow swing arm 6, and one end of the driving shaft 10 corresponding to the swing arm 6 is fixedly connected to the sprocket 37 at the lower end, and one end of the sprocket 37 at the lower end is connected to the output shaft of the motor, so that the motor can drive the driving shaft 10 and the sprocket 37 to rotate synchronously. If it is a double-shaft motor, the motor is installed on the other side of the lower end of the swing arm 6, and the output shafts at both ends of the motor are respectively It is fixedly connected to the end of the lower sprocket 37 and the end of the drive shaft 10, so as to synchronously realize the rotation of the drive shaft 10 and the sprocket 37. The sprockets 37 at the upper and lower ends are rotated in the swing arm 6 through the rotating shaft, that is, the sprocket 37 is fixed on the rotating shaft, and the rotating shaft rotates in the swing arm 6. One end of the rotating shaft corresponding to the upper sprocket 37 extends to the outside of the swing arm 6 and is provided with a fourth gear 35 corresponding to the third gear 34. Initially, the third gear 34 and the fourth gear 35 are in a meshing state. When the two drive shafts 10 are opened, the fourth gear 35 is separated from the third gear 34.

[0035] In order to facilitate the loading and unloading of the quartz glass tube, a roller shaft 17 is rotatably provided on the inner side of the upper shell 1 and the lower shell 2, and an upper roller 13 and a lower roller 14 are fixed on the upper and lower roller shafts 17 respectively. The periphery of the upper roller 13 and the lower roller 14 are provided with a receiving groove 15, and the number of the receiving grooves 15 on the upper roller 13 and the lower roller 14 is the same, and they are all evenly arranged around, and the receiving groove 15 is adapted to the quartz glass tube. The top of the upper end of the upper shell 1 and the lower shell 2 are provided with an inlet 4, and the bottom of the upper shell 1 and the lower shell 2 are provided with an outlet 3, and the inlet The opening 4 and the discharge opening 3 both correspond to the receiving groove 15. In order to realize the opening of the two drive shafts 10 when the lower roller 14 rotates, a linkage mechanism for driving the swing shaft 8 to rotate is provided at one end of the lower roller 14. As a preferred embodiment, the linkage mechanism includes a first gear 11 provided at one end of the swing shaft 8. The inner wall of the end of the shell is vertically movable and is provided with a lifting frame 9 located between the two swing shafts 8 at the same end. Specifically, the lifting frame 9 is provided on the inner wall of the end where the upper shell 1 and the lower shell 2 are connected, and a vertical linear guide is provided on the inner wall. The lifting frame 9 is fixedly connected to the linear guide rail to ensure stability. Racks 5 meshing with the first gear 11 are provided on both sides of the upper end of the lifting frame 9. A linkage ring 16 is fixed to the outer side of the end of the lower rotating roller 14. The outer side wall of the linkage ring 16 is evenly provided with an arc-shaped outer groove 23. The inner side wall of the linkage ring 16 is evenly provided with an arc-shaped inner groove 24 spaced apart from the outer groove 23. The ends of the adjacent outer grooves 23 and the inner grooves 24 are connected by a connecting groove 25. The lower end side wall of the lifting frame 9 is provided with a movable guide with the outer groove 23, the inner groove 24, and the connecting groove 25. The matching guide member 29 is cylindrical in shape to reduce friction and is rotatably arranged on the side wall of the lower end of the lifting frame 9. The configuration is as follows: when the guide member 29 is located inside the outer groove 23, the rollers 20 on the two drive shafts 10 can support the quartz glass tube. When the guide member 29 is located inside the inner groove 24, the two drive shafts 10 are unfolded. At this time, the distance between the two sets of rollers 20 on the two drive shafts 10 is not less than the diameter of the quartz glass tube, and at this time, a receiving groove 15 on the lower roller 14 just faces upward and corresponds to the gap between the two drive shafts 10.

[0036] like Figure 1 、 Figure 6-Figure 7As shown, in order to increase the stability of the swing arm 6 during measurement, a support plate 7 corresponding to the swing arm 6 and used to support the bottom of the swing arm 6 is provided on the inner wall of the end of the shell. The support plate 7 is inclined. In the initial state, the top inclined surface of the swing arm 6 is in contact with one side of the support plate 7. In order to further reduce the overall stability of the swing shaft 8, the swing arm 6, and the drive shaft 10 during detection, a fixing frame 26 is provided on the inner wall of the end where the upper shell 1 and the lower shell 2 are connected, and an elastic member 28 is provided between the fixing frame 26 and the lifting frame 9. A pin 27 is vertically movably connected to the fixing frame 26. The bottom of the pin 27 is fixed to the top of the lifting frame 9. The elastic member 28 is preferably a spring, and the spring is sleeved on the outside of the pin 27 to increase the stability of the spring. Initially, the spring is in a contracted state, so that the spring provides a reverse force to the lifting frame 9, thereby increasing the stability of the lifting frame 9, thereby improving the overall stability of the first gear 11, the swing shaft 8, the swing arm 6, and the drive shaft 10, and reducing the possibility of loosening.

[0037] In addition, if Figure 2 、 Figure 4 、 Figure 9As shown, in order to realize the rotation of the upper rotating roller 13 and the lower rotating roller 14, a gear drive assembly for driving the upper rotating roller 13 and the lower rotating roller 14 to rotate alternately is provided at the end of the shell, and the gear drive assembly includes a second gear 18 provided at one end of the upper shell 1 and the lower shell 2, one end of the two roller shafts 17 extends outward and is fixedly connected to the middle of the two second gears 18 respectively, and a protective cover is provided on the outside of the two second gears 18, and an incomplete gear 19 located between the two second gears 18 and adapted to the second gear 18 is rotatably provided in the middle of the inner cavity of the protective cover, and a first driving source 12 for driving the incomplete gear 19 to rotate is provided on the outside of one end of the protective cover. The first driving source 12 is preferably a motor. In order to increase the stability of the second gear 18 in the non-meshing state with the incomplete gear 19, a locking member for alternately locking the two second gears 18 is also provided, and the locking member includes a locking plate 3 provided on one side of the second gear 18 8. The periphery of the locking plate 38 is evenly provided with arc-shaped grooves corresponding to the accommodating grooves 15. A locking arc 39 is provided on one side of the incomplete gear 19 in a fan shape and adapted to the arc-shaped groove on the locking plate 38. The locking arc 39 enters the arc-shaped groove to realize the locking of the lower locking plate 38, and is configured as follows: when the incomplete gear 19 is separated from the upper second gear 18, the locking arc 39 enters one of the arc-shaped grooves on the upper locking plate 38; when the incomplete gear 19 is separated from the lower second gear 18, the locking arc 39 enters one of the arc-shaped grooves on the locking plate 38; during the engagement of the incomplete gear 19 with the second gear 18, the rotation amplitude of the second gear 18 is driven to be the distance between the two accommodating grooves 15, so that during the engagement of the incomplete gear 19 with one of the second gears 18, one of the accommodating grooves 15 on the upper rotating roller 13 and the lower rotating roller 14 can correspond to the gap between the two drive shafts 10.

[0038] Working principle: When in use, the quartz glass tube to be tested falls into the receiving groove 15 on the upper rotating roller 13 through the inlet 4 at the upper end of the upper shell 1 for storage, and the first driving source 12 drives the incomplete gear 19 to rotate, and the incomplete gear 19 drives the second gear 18 at the upper end to rotate, and then the second gear 18 at the upper end drives the upper rotating roller 13 to rotate, thereby transporting the quartz glass tube to be tested downward. When the quartz glass tube corresponds to the discharge port 3 at the bottom of the upper shell 1, it can fall onto the two sets of rollers 20 through the discharge port 3, and initially the fourth gear 35 and the third gear 34 are in meshing state, and the second driving source 30 is started to drive one of the driving shafts 10 and a sprocket 37 to rotate, and then the driving shaft 10 drives a group of rollers 20 to rotate, and the group of rollers 20 drives the quartz glass As the tube rotates, the other set of rollers 20 rotates passively. During this period, under the action of the synchronous chain 36 and the other sprocket 37, the fourth gear 35 drives the screw 31 to rotate through the third gear 34, and then the screw 31 drives the movable frame 32 to move toward the direction of the quartz glass tube, so that the two micro laser sensors 33 move to the quartz glass tube. The micro laser sensor 33 at the upper end moves to the outside of the quartz glass tube, and the micro laser sensor 33 at the lower end moves to the inside of the quartz glass tube. Since the quartz glass tube is in a rotating state, the measuring points are formed in a spiral trajectory to cover the entire surface of the tube wall. The external micro laser sensor 33 emits a laser beam vertically to penetrate the transparent tube wall. Part of the light is reflected on the outer surface and captured by the external probe, and the other part of the light is refracted into the interior of the glass. After being reflected by the inner wall, it returns to the external sensor, or the inner wall position is directly detected by the internal micro laser sensor 33. The system calculates the pipe wall thickness in real time by distinguishing the optical path difference of the reflected light from the inner and outer walls and combining it with the preset fixed distance between the sensors. Alternatively, in order to improve the measurement accuracy, the second driving source 30 can be controlled to operate intermittently and stop briefly when measuring each point to improve the accuracy. After the measurement is completed, the second driving source 30 controls the driving shaft 10 and the sprocket 37 to reverse, and then the screw 31 reverses, the detection frame 22 drives the micro laser sensor 33 to retract and reset, and then controls the first driving source 12 to continue to drive the incomplete gear 19 to rotate. At this time, the incomplete gear 19 is engaged with the second gear 18 at the lower end, and the locking arc 39 is separated from the locking disk 38 at the lower end. The locking plate 38 at the upper end is locked, and the second gear 18 at the lower end drives the lower roller 14 to rotate through the roller shaft 17. The lower roller 14 drives the linkage ring 16 at the end to rotate synchronously. Initially, the guide member 29 is located in one of the outer grooves 23. When the linkage ring 16 rotates following the lower roller 14, the guide member 29 gradually enters the inner groove 24 through the connecting groove 25, and then the lifting frame 9 drives the rack 5 to move downward. The rack 5 drives the swing shaft 8 to rotate through the first gear 11. The swing shaft 8 drives the two drive shafts 10 to gradually open through the swing arm 6. When opening, one of the receiving grooves 15 on the lower roller 14 is just facing upward and coincides with the inlet 4 at the upper end of the lower shell 2. Then, the quartz glass tube after measurement falls into the receiving groove 15, and then the lower roller 14 continues to rotate a certain amplitude.After the measurement, the quartz glass tube is transferred to the interior of the lower shell 2. As the linkage ring 16 rotates, the guide member 29 gradually returns to the other outer groove 23 through the connecting groove 25. Then, the lifting frame 9 drives the rack 5 to rise, and the two drive shafts 10 swing down and merge. The swing arm 6 is supported by the support plate 7 to increase stability, and the elastic member 28 is in a contracted state, further increasing stability and reducing looseness. Then, the incomplete gear 19 separates from the second gear 18 at the lower end and meshes with the second gear 18 at the upper end again, thereby driving the upper roller 13 to rotate. The quartz glass tube to be inspected continues to fall onto the two sets of rollers 20 on the two drive shafts 10, and then continues to control the second drive source 30 to realize the measurement and inspection operation. In this device, loading and unloading are carried out alternately. The upper roller 13 rotates to load the material and then performs inspection. After the inspection, the lower roller 14 rotates and automatically realizes the unloading operation. The inspection continuity is high, the power source is small, and the manual participation is small. It is suitable for the wall thickness measurement of batch quartz glass tubes.

[0039] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A quartz glass tube wall thickness measuring device based on laser measurement, characterized in that: The invention comprises a housing and a support assembly arranged on the housing, wherein the housing comprises an upper housing (1) and a lower housing (2) arranged below the upper housing (1) and connected to the upper housing (1) as a whole, the support assembly being arranged in a gap between the upper housing (1) and the lower housing (2), and a laser detection assembly being arranged at one end between the upper housing (1) and the lower housing (2); The laser detection assembly comprises a detection frame (22) disposed at one end between the upper shell (1) and the lower shell (2); a screw rod (31) is rotatably disposed on the detection frame (22); a movable frame (32) is threadedly connected to the screw rod (31); and coaxial micro laser sensors (33) are disposed on upper and lower sides of one end of the movable frame (32); The support assembly comprises a pair of drive shafts (10) arranged between the upper shell (1) and the lower shell (2), a roller (20) being provided on the drive shaft (10), a swing arm (6) being rotatably provided at the end of the drive shaft (10), a swing shaft (8) being fixed at the upper end of the swing arm (6) and being rotatably connected to the inner wall of the end of the shell, and a driving mechanism for driving the screw rod (31) and the drive shaft (10) to rotate being provided on one of the swing arms (6); The driving mechanism includes a third gear (34) provided at one end of the screw rod (31), one of the swing arms (6) corresponding to the detection frame (22) is a hollow structure, sprockets (37) are rotatably provided at both ends of the inner side of the swing arm (6), and a synchronous chain (36) is engaged with the two sprockets (37), a second driving source (30) for driving the sprockets (37) to rotate is provided on one side of the swing arm (6), and a driving shaft (10) corresponding to the swing arm (6) is coaxially provided with one of the sprockets (37), and a fourth gear (35) extending to the outside of the swing arm (6) and corresponding to the third gear (34) is provided on one side of the sprocket (37) at the upper end; An upper rotating roller (13) is rotatably provided on the inner side of the upper shell (1), and a lower rotating roller (14) is rotatably provided on the inner side of the lower shell (2). The outer peripheries of the upper rotating roller (13) and the lower rotating roller (14) are both provided with a receiving groove (15), and one end of the lower rotating roller (14) is linked with a linkage mechanism for driving the swing shaft (8) to rotate. The linkage mechanism includes a first gear (11) arranged at one end of the swing shaft (8); a lifting frame (9) is vertically movably arranged on the inner wall of the end of the shell between the two swing shafts (8) located at the same end; racks (5) meshing with the first gear (11) are arranged on both sides of the upper end of the lifting frame (9); a linkage ring (16) is fixed to the outer side of the end of the lower rotating roller (14); an outer arc-shaped outer groove (23) is uniformly provided on the outer side wall of the linkage ring (16); an inner arc-shaped inner groove (24) is uniformly provided on the inner side wall of the linkage ring (16) and is spaced apart from the outer groove (23); and the ends of adjacent outer grooves (23) and inner grooves (24) are connected through a connecting groove (25); and a guide member (29) is provided on the lower side wall of the lifting frame (9) for movably guiding the outer groove (23), the inner groove (24) and the connecting groove (25).

2. The quartz glass tube wall thickness measuring device based on laser measurement according to claim 1, characterized in that: One end of the movable frame (32) passes through one end of the detection frame (22) and cooperates with the movable guide of the detection frame (22), and the movable direction of the movable frame (32) is parallel to the axis of the driving shaft (10).

3. The quartz glass tube wall thickness measuring device based on laser measurement according to claim 1, characterized in that: The guide member (29) is cylindrical and is rotatably arranged on the lower end side wall of the lifting frame (9).

4. The quartz glass tube wall thickness measuring device based on laser measurement according to claim 1, characterized in that: The inner wall of the end portion of the housing is provided with a support plate (7) corresponding one-to-one to the swing arm (6) and used to support the bottom of the swing arm (6), and the support plate (7) is arranged at an angle.

5. The quartz glass tube wall thickness measuring device based on laser measurement according to claim 1, characterized in that: A fixing frame (26) located above the lifting frame (9) is provided on the inner wall of the end portion of the shell, and an elastic member (28) is provided between the fixing frame (26) and the lifting frame (9).

6. The quartz glass tube wall thickness measuring device based on laser measurement according to claim 1, characterized in that: The top of the upper end of the upper shell (1) and the lower shell (2) are both provided with an inlet (4), and the bottom of the upper shell (1) and the lower shell (2) are both provided with a discharge port (3), and the inlet (4) and the discharge port (3) both correspond to the accommodating groove (15).

7. The quartz glass tube wall thickness measuring device based on laser measurement according to claim 1, characterized in that: The end of the driving shaft (10) is provided with a limiting piece (21) having a diameter greater than that of the roller (20) and used for limiting the position of the quartz glass tube.

8. The quartz glass tube wall thickness measuring device based on laser measurement according to any one of claims 1 to 7, characterized in that: The end of the housing is provided with a gear drive assembly for driving the upper rotating roller (13) and the lower rotating roller (14) to rotate alternately.

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