Glass tube thickness measuring device and method

Abstract

The application belongs to the technical field of glass tube thickness measurement, and particularly relates to a glass tube thickness measurement device and method, which comprises a supporting mechanism, a clamping mechanism for glass tube measurement positioning is arranged on the supporting mechanism, a detection mechanism for glass tube measurement is arranged on one side of the supporting mechanism, and a cleaning mechanism for removing dust from the outer wall of the glass tube is arranged on the detection mechanism; the supporting mechanism comprises a supporting table, two same-specification adjusting plates and a positioning plate are arranged above the supporting table respectively. The servo motor one drives the threaded rod to rotate, drives the adjusting plate and the rubber roller to translate along the supporting table, cooperates with the positioning plate of the fixed end, can flexibly adapt to the support span of glass tubes with different lengths, the servo motor two drives the rubber roller to rotate, relies on friction to drive the pipeline to rotate around the axis of the pipeline, is convenient for circumferential multi-point measurement, and the baffle limits the pipeline in the axial direction to prevent deviation.

Description

Technical Field

[0001] This invention belongs to the field of glass tube thickness measurement technology, specifically a glass tube thickness measurement device and method. Background Technology

[0002] As a basic industrial component, glass tubes are widely used in many fields such as medical, chemical, optical instruments, laboratory equipment and lighting equipment. The uniformity of their wall thickness directly affects the mechanical strength, pressure resistance and service life of the product, and is one of the core indicators for measuring the quality of glass tubes. With the continuous improvement of product quality requirements in various downstream industries, the demand for online detection and precise control of wall thickness parameters in the glass tube production process is increasing.

[0003] Existing methods for measuring glass tube thickness are mainly divided into two categories: contact measurement and non-contact measurement. Contact measurement often uses calipers, micrometers, or contact displacement sensors. This method requires the probe to be in direct contact with the surface of the glass tube during the measurement process. Not only is it easy for the measurement results to deviate due to fluctuations in operating pressure, but it may also scratch the glass surface and affect the appearance quality of the product. Among non-contact measurements, optical measurement methods are more common, but they have high requirements for the cleanliness of the glass tube surface. Dust, oil, and other impurities attached to the surface will significantly affect the measurement accuracy.

[0004] Most equipment uses manual clamping or simple V-block positioning, which makes it difficult to ensure the axial stability of the glass tube during the measurement process. Especially for slender or thin-walled glass tubes, uneven clamping force can easily cause deformation, leading to distorted measurement data. At the same time, existing equipment generally lacks the function of pre-cleaning impurities on the surface of the glass tube, requiring manual wiping before measurement, which is inefficient and the cleaning effect is unstable. Summary of the Invention

[0005] The purpose of this invention is to provide a glass tube thickness measuring device and method to solve the above-mentioned problems, which can solve the problems of unstable positioning, surface impurities interfering with measurement accuracy, and low measurement efficiency when measuring the wall thickness of glass tubes.

[0006] To address the aforementioned problems, the present invention provides a technical solution: a glass tube thickness measuring device, comprising a support mechanism, a clamping mechanism for measuring and positioning the glass tube on the support mechanism, a detection mechanism for measuring the glass tube on one side of the support mechanism, and a cleaning mechanism for removing dust from the outer wall of the glass tube on the detection mechanism. The support mechanism includes a support platform. Two adjustment plates and a positioning plate of the same specifications are respectively arranged on the upper part of the support platform. Rubber rollers are symmetrically arranged on the upper end of the adjustment plate and the upper end of the positioning plate. The surface of the rubber rollers makes rolling contact with the pipe body to be tested. The clamping mechanism includes a side platform. The side platform is fixedly installed on one side of the adjusting plate by a bracket. Clamping plates are symmetrically distributed above the side platform. The clamping plates are arc-shaped rubber plates. The two clamping plates are attached to the outer wall of the pipe body being tested. The detection mechanism includes a movable frame, which is an L-shaped structure. A servo cylinder is embedded in the upper horizontal end of the movable frame. The servo cylinder has a piston rod for driving extension and retraction inside, and a probe is fixedly installed at the end of the piston rod.

[0007] Preferably, the lower end of the support platform is equipped with a support leg, and the support platform has an inner cavity. Both sides of the inner wall of the inner cavity are fixed with rod sleeves, and a threaded rod is rotatably installed between the two rod sleeves. One end of the support platform is fixedly installed with a servo motor through a bracket. The servo motor has a rotating shaft for driving inside, and the connection position between the end of the rotating shaft and the threaded rod is set by a coupling.

[0008] Preferably, a threaded cylinder is threaded onto the surface of the threaded rod, and a limit block is fixedly installed on the outer wall of the threaded cylinder. The upper end of the limit block is fixed to the lower end of the adjusting plate. A limit hole is opened at the upper end of the inner wall of the inner cavity. The surface of the limit block is slidably attached to the inner wall of the limit hole. A connecting platform is also fixedly installed at the upper end of the support platform. The upper end of the connecting platform is fixed to the lower end of the positioning plate.

[0009] Preferably, rollers are symmetrically installed at the lower end of the adjusting plate, and the rollers are in rolling contact with the surface of the support platform. Side plates are symmetrically installed at the upper end of the adjusting plate and the upper end of the positioning plate, and a bushing is embedded in the side plate.

[0010] Preferably, the two bushings located on one side are rotatably mounted with the same shaft, and a rubber roller is fixedly sleeved on the surface of the shaft. A servo motor is also fixedly mounted on the surface of the side plate by a bracket. The servo motor has a rotating shaft for driving inside, and the end of the rotating shaft is connected to the shaft via a coupling. A baffle is fixedly mounted on one side of the positioning plate, and one side of the baffle is tightly attached to the end face of the pipe body being measured.

[0011] Preferably, the side platform has an inner cavity II, and bushing II is embedded on both sides of the inner cavity II. The same shaft II is rotatably installed inside the two bushing II. A servo motor III is fixedly installed at the outer end of the side platform by a bracket. The servo motor III has a rotating shaft III for driving inside. The end of the rotating shaft III is connected to the shaft II by a coupling. The surface of the shaft II has two sections of external threads of the same specification symmetrically arranged. A threaded sleeve is threadedly installed on any section of the external threads. A limit rod is fixedly installed on the surface of the threaded sleeve. A limit hole II is opened at the upper end of the inner wall of the inner cavity II, penetrating its interior. The surface of the limit rod is slidably and tightly attached to the inner wall of the limit hole II. A clamping plate is fixedly installed at the upper end of the limit rod.

[0012] Preferably, a guide rail sub-rail is fixedly installed on one side of the support platform. Reinforcing ribs are installed at both ends of one side of the guide rail sub-rail, and the other end of the reinforcing ribs is fixed to the end face of the support platform. Anti-detachment blocks are fixedly installed at both ends of the guide rail sub-rail. A guide rail sub-slide is slidably arranged on the surface of the guide rail sub-rail. The guide rail sub-rail and the guide rail sub-slide form a linear guide rail pair. A movable frame is fixedly mounted on the surface of the guide rail sub-slide. An ultrasonic testing instrument for detecting the thickness of the pipe body under test is fixedly installed at the lower horizontal end of the movable frame. The ultrasonic testing instrument is electrically connected to the probe through a data cable.

[0013] Preferably, the cleaning mechanism includes an air pump, with an air supply pipe connected to the air outlet flange of the air pump, and an air blowing pipe connected to the other end flange of the air supply pipe. The end of the air blowing pipe is inclined, and a high-pressure air nozzle is fixedly connected to the end of the air blowing pipe. The high-pressure air nozzle is fitted to the surface of the pipe body being tested. A sleeve is fixedly fixed through the surface of the movable frame. The air blowing pipe and the sleeve are slidably connected through the sleeve. A filter cartridge is covered at the air inlet of the air pump. A filter screen is embedded inside the filter cartridge. Pin sleeves are symmetrically fixed to the air inlet of the air pump by a bracket. A pin is slidably sleeved inside the pin sleeve. A spring is wound around the surface of the pin. The two ends of the spring are fixedly installed to the end face of the pin sleeve and the end of the pin, respectively. A pin seat is fixedly installed on the surface of the filter cartridge. The end of the pin away from the spring is inserted and connected to the inside of the pin seat.

[0014] Preferably, a servo cylinder two is fixedly mounted on the surface of the mobile frame. The servo cylinder two has a piston rod two for driving extension and retraction inside. A servo motor four is fixedly mounted on the end of the piston rod two. A rotating shaft four for driving is inside the servo motor four. A flexible brush is fixedly mounted on the end of the rotating shaft four.

[0015] A method for measuring the thickness of a glass tube includes: S1, the system is powered on and performs a self-test to confirm that the communication of each electrical component is normal. Then, a servo motor drives a threaded rod to rotate, which drives an adjustment plate to slide linearly through a threaded cylinder. Based on the length parameters of the pipe body being measured, the adjustment plate is automatically adjusted to a spacing position that is compatible with the positioning plate, thus completing the initial adjustment of the measurement platform. S2. The pipe body to be measured is hoisted onto the rubber roller and pushed axially so that its end face is in close contact with the baffle. The sensor on the baffle sends a positioning signal to the control system to determine the zero point of the axial measurement reference. S3. The control system starts the servo motor three, drives the shaft two to rotate, and the two external threads drive the two threaded sleeves to move in opposite directions, so that the arc-shaped rubber clamps clamp the outer wall of the pipe from both sides simultaneously. When the driving current reaches the clamping torque threshold, the motor self-locks, and completes radial centering clamping. S4. The control system starts the air pump, and the high-pressure air nozzle blows the surface of the pipe. At the same time, the servo cylinder two pushes the flexible brush to contact the pipe wall, and the servo motor four drives the brush to rotate and brush. After brushing is completed, the brush returns to its original position, and the high-pressure air nozzle continues to spray air for 2-3 seconds to completely blow away the residual debris. S5. The guide rail slide moves precisely along the guide rail under the electric control drive, positioning the moving frame to the preset measurement section. Servo cylinder one pushes the probe to fit against the pipe wall, and servo motor two drives the rubber roller to rotate, causing the pipe to rotate at a uniform speed for one revolution. The ultrasonic detector continuously collects the 360° circumferential wall thickness data of this section through the probe. S6. The probe retracts and lifts, and the guide rail slide is electrically driven to move to the next preset section. Repeat step S5 to complete the measurement of all points. After all tasks are completed, all actuators automatically reset, the clamps expand and loosen, the pipe is removed, and the measurement ends.

[0016] The beneficial effects of this invention are: 1. This invention uses a servo motor to drive the threaded rod to rotate, which in turn drives the adjusting plate and rubber roller to move along the support platform. With the positioning plate at the fixed end, it can flexibly adapt to the support span of glass tubes of different lengths. At the same time, a servo motor drives the rubber roller to rotate, which drives the pipe to rotate around its own axis by friction, which is convenient for multi-point measurement in the circumference. The baffle limits the axial movement of the pipe to prevent it from deviating. 2. This invention uses two external threads with opposite directions on the two drive shafts of the servo motor to drive two threaded sleeves and arc-shaped rubber clamps to move synchronously towards or away from each other, so as to realize the rapid centering, clamping and release of the pipe, ensure that the pipe axis position remains unchanged during measurement, improve positioning consistency, and the arc-shaped rubber plate fits against the outer wall of the pipe to provide uniform radial clamping force without scratching the glass surface. 3. This invention uses an air pump to guide high-pressure air through an air pipe and a high-pressure nozzle to the front of the measurement position, tilting and blowing away dust particles from the surface of the pipe. In conjunction with a retractable servo cylinder, a flexible brush is rotated to assist in removing stubborn deposits. This dual cleaning ensures good coupling between the probe and the outer wall of the pipe. Attached Figure Description

[0017] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram showing the distribution of the various mechanisms in this invention; Figure 2 This is a schematic diagram of the overall front structure of the present invention; Figure 3 This is a schematic diagram of the overall side structure of the present invention; Figure 4 This is a schematic diagram of the interior of the cavity of the present invention; Figure 5 This is a schematic diagram of the connection of the rubber roller portion of the present invention; Figure 6 This is a schematic diagram of the internal structure of the inner cavity of the present invention; Figure 7 This is a bottom view of the detection mechanism of the present invention; Figure 8 This is a top view of the cleaning mechanism of the present invention; Figure 9 This is a schematic diagram showing the installation of the filter cartridge, filter screen, and pin portion of the present invention. Figure 10 This is a schematic diagram of the flexible brush portion of the present invention.

[0019] In the diagram: 1. Support mechanism; 10. Support platform; 11. Support leg; 111. Inner cavity one; 12. Rod sleeve; 13. Threaded rod; 14. Threaded cylinder; 15. Limiting hole one; 16. Limiting block; 17. Servo motor one; 18. Adjusting plate; 19. Connecting platform; 110. Positioning plate; 1001. Roller; 1002. Side plate; 1003. Bushing one; 1004. Shaft one; 1005. Rubber roller; 1006. Servo motor two; 1007. Tested pipe body; 1008. Baffle. 2. Clamping mechanism; 20. Side platform; 21. Inner cavity two; 22. Bushing two; 23. Shaft two; 24. External thread; 25. Servo motor three; 26. Threaded sleeve; 27. Limiting rod; 28. Clamping plate; 29. ​​Limiting hole two; 3. Testing mechanism; 30. Guide rail pair; 31. Reinforcing rib; 32. Anti-detachment block; 33. Guide rail pair slide; 34. Moving frame; 35. Servo cylinder one; 36. Probe; 37. Ultrasonic testing instrument; 4. Cleaning mechanism; 40. Air pump; 41. Air supply pipe; 42. Air blowing pipe; 43. High-pressure air nozzle; 44. Tube sleeve; 45. Filter cartridge; 46. Filter screen; 47. Pin sleeve; 48. Pin; 49. Spring; 410. Pin seat; 4001. Servo cylinder two; 4002. Servo motor four; 4003. Flexible brush. Detailed Implementation

[0020] like Figures 1-10 As shown, the specific implementation adopts the following technical solution: Example: A glass tube thickness measuring device includes a support mechanism 1, a clamping mechanism 2 for measuring and positioning the glass tube on the support mechanism 1, a detection mechanism 3 for measuring the glass tube on one side of the support mechanism 1, and a cleaning mechanism 4 for removing dust from the outer wall of the glass tube on the detection mechanism 3. The support mechanism 1 supports and axially transports the pipe body 1007 to be measured. The clamping mechanism 2 radially positions the pipe during measurement. The detection mechanism 3 moves the probe 36 to the measurement position. The cleaning mechanism 4 blows and removes dust from the outer wall of the pipe before measurement to ensure the coupling effect of ultrasonic testing.

[0021] The support mechanism 1 includes a support platform 10. Two identical adjustment plates 18 and positioning plates 110 are respectively arranged on the upper part of the support platform 10. Rubber rollers 1005 are symmetrically arranged on the upper end of the adjustment plate 18 and the upper end of the positioning plate 110. The surface of the rubber rollers 1005 rolls in contact with the surface of the pipe body 1007 to be measured. The adjustment plate 18 can move laterally relative to the support platform 10 to adapt to glass tubes of different lengths. The positioning plate 110 is fixed to the other end of the support platform 10. The two work together to form a stable rolling support structure. The rubber rollers 1005 roll in contact with the surface of the pipe body 1007 to be measured, which can not only support the weight of the pipe, but also drive the pipe to rotate around its own axis when rotating, which is convenient for multi-point measurement in the circumference.

[0022] The clamping mechanism 2 includes a side platform 20. The side platform 20 is fixedly installed on one side of the adjusting plate 18 by a bracket. Clamping plates 28 are symmetrically distributed above the side platform 20. The clamping plates 28 are arc-shaped rubber plates. The two clamping plates 28 are set to fit against the outer wall of the pipe body 1007 being measured. The inner arc surface of the arc-shaped rubber plate is adapted to the outer wall of the pipe. It will not scratch the glass surface when clamping and has a certain elastic deformation capacity. It can provide uniform radial clamping force to prevent the pipe from shaking or axially moving during the measurement process.

[0023] The testing mechanism 3 includes a movable frame 34, which has an L-shaped structure. A servo cylinder 35 is embedded in the upper horizontal end of the movable frame 34. The servo cylinder 35 has a piston rod for driving extension and retraction inside, and a probe 36 is fixedly installed at the end of the piston rod. The probe 36 is an ultrasonic probe, which can move perpendicular to the outer wall of the pipe under the push of the servo cylinder 35, so that the working end face of the probe 36 is in close contact with the outer wall of the pipe body 1007 under test, ensuring the effective transmission and reception of ultrasonic signals.

[0024] The support platform 10 is equipped with a support leg 11 at its lower end. The support platform 10 has an inner cavity 111 inside. Both sides of the inner wall of the inner cavity 111 are fixed with rod sleeves 12. A threaded rod 13 is rotatably installed between the two rod sleeves 12. A servo motor 17 is fixedly installed at one end of the support platform 10 by a bracket. The servo motor 17 has a drive shaft inside. The end of the drive shaft is connected to the threaded rod 13 by a coupling. The servo motor 17 serves as a drive source and can drive the threaded rod 13 to rotate in both directions under the support of the rod sleeves 12.

[0025] The threaded rod 13 has a threaded cylinder 14 threaded onto its surface. A limit block 16 is fixedly installed on the outer wall of the threaded cylinder 14. The upper end of the limit block 16 is fixed to the lower end of the adjusting plate 18. A limit hole 15 is opened on the upper end of the inner wall of the inner cavity 111. The surface of the limit block 16 slides and fits tightly against the inner wall of the limit hole 15. A connecting platform 19 is also fixedly installed on the upper end of the support platform 10. The upper end of the connecting platform 19 is fixed to the lower end of the positioning plate 110. When the threaded rod 13 rotates, the threaded cylinder 14 cannot rotate due to the sliding fit between the limit block 16 and the limit hole 15. As a result, it moves along the axial direction of the threaded rod 13, thereby driving the adjusting plate 18 to translate relative to the support platform 10, realizing the adjustment and positioning function in the length direction to adapt to the support span of glass tubes of different specifications.

[0026] Among them, rollers 1001 are symmetrically installed at the lower end of the adjusting plate 18. The rollers 1001 are in rolling contact with the surface of the support platform 10. The rollers 1001 provide rolling support when the adjusting plate 18 moves, reduce frictional resistance, and ensure that the adjusting plate 18 runs smoothly. Side plates 1002 are symmetrically installed at the upper end of the adjusting plate 18 and the upper end of the positioning plate 110. A bushing 1003 is embedded in the side plate 1002.

[0027] The two bushings 1003 located on one side are rotatably mounted with the same shaft 1004. A rubber roller 1005 is fixedly sleeved on the surface of the shaft 1004. A servo motor 1006 is also fixedly mounted on the surface of the side plate 1002 through a bracket. The servo motor 1006 has a rotating shaft 2 for driving inside. The end of the rotating shaft 2 is connected to the shaft 1004 through a coupling. A baffle 1008 is fixedly mounted on one side of the positioning plate 110. One side of the baffle 1008 is tightly attached to the end face of the pipe body 1007 being measured. After the servo motor 1006 is started, it drives the rubber roller 1005 to rotate through the shaft 1004. The friction between the rubber roller 1005 and the surface of the pipe body 1007 being measured drives the pipe to rotate around its own axis, realizing the switching of the circumferential measurement position. The baffle 1008 limits the axial position of the pipe to prevent it from shifting axially during rotation.

[0028] The side platform 20 has an inner cavity 21, with bushings 22 embedded on both sides of the inner cavity 21. A single shaft 23 is rotatably mounted inside both bushings 22. A servo motor 25 is fixedly mounted on the outer end of the side platform 20 via a bracket. A drive shaft 3 is located inside the servo motor 25, and the end of the drive shaft 3 is connected to the shaft 23 via a coupling. Two equal-sized external threads 24 are symmetrically arranged on the surface of the shaft 23. A threaded sleeve 26 is threaded onto either of the external threads 24, and a limit rod 2 is fixedly mounted on the surface of the threaded sleeve 26. 7. A limiting hole 29 is provided at the upper end of the inner wall of the inner cavity 21, which penetrates the interior. The surface of the limiting rod 27 is slidably attached to the inner wall of the limiting hole 29. A clamping plate 28 is fixedly installed at the upper end of the limiting rod 27. When the servo motor 25 drives the shaft 23 to rotate, the two threaded sleeves 26 move synchronously towards or away from each other under the guidance of the limiting rod 27 and the limiting hole 29 due to the opposite rotation directions of the two external threads 24. This causes the two clamping plates 28 to move synchronously closer to or away from the center of the pipe, thereby achieving rapid centering, clamping and releasing. This ensures that the axial position of the pipe remains unchanged when it is clamped, improving the consistency of measurement and positioning.

[0029] Among them, a guide rail sub-rail 30 is fixedly installed on one side of the support platform 10. Reinforcing ribs 31 are installed at both ends of one side of the guide rail sub-rail 30, and the other end of the reinforcing ribs 31 is fixed to the end face of the support platform 10. The reinforcing ribs 31 enhance the connection rigidity between the guide rail sub-rail 30 and the support platform 10, preventing vibration or displacement during the testing process. Anti-detachment blocks 32 are fixedly installed at both ends of the guide rail sub-rail 30. The anti-detachment blocks 32 limit the limit stroke of the guide rail sub-slide 33, preventing the slide from accidentally detaching. A guide rail sub-slide 33 is slidably disposed on the surface of the guide rail sub-rail 30. The guide rail sub-rail 30 and the guide rail sub-slide 33 form a linear guide rail pair. A movable frame 34 is fixedly mounted on the surface. The linear guide rail pair is an electric linear slide table, model TSAxx-B series. By electrically controlling the movable frame 34, the guide rail pair slide 33 can slide smoothly along the guide rail pair guide rail 30, realizing the adjustment of the overall position of the detection mechanism 3 along the pipeline axis. An ultrasonic detector 37 for detecting the thickness of the pipeline body 1007 is fixedly installed at the lower horizontal end of the movable frame 34. The ultrasonic detector 37 is electrically connected to the probe 36 through a data cable. The ultrasonic detector 37 is used to transmit and receive ultrasonic signals and convert the signals into thickness values. The data cable connection between it and the probe 36 ensures the stability of signal transmission.

[0030] The cleaning mechanism 4 includes an air pump 40. An air supply pipe 41 is connected to the air outlet flange of the air pump 40, and a blowing pipe 42 is connected to the other end flange of the air supply pipe 41. The end of the blowing pipe 42 is inclined, and a high-pressure nozzle 43 is fixedly connected to the end of the blowing pipe 42. The high-pressure nozzle 43 is fitted to the surface of the pipe body 1007 being tested. The inclined blowing pipe 42 allows the high-pressure nozzle 43 to be aligned with the outer wall of the pipe at a certain angle, guiding the airflow to the area in front of the measurement position of the probe 36, effectively blowing away dust and particles adhering to the pipe surface. A sleeve 44 is fixedly fixed through the surface of the moving frame 34. The blowing pipe 42 slides through the sleeve 44, allowing the blowing pipe 42 to move synchronously with the moving frame 34 and to be finely adjusted axially within the sleeve 44 to align with the surface of pipes of different diameters. The air inlet of the air pump 40 is covered with... A filter cartridge 45 is provided, and a filter screen 46 is embedded inside the filter cartridge 45. The filter screen 46 can filter large particulate impurities in the intake air, preventing dust from entering the air pump 40 and causing wear or contamination of the pipe surface. A pin sleeve 47 is symmetrically fixed on the air inlet end of the air pump 40 by a bracket. A pin 48 is slidably sleeved inside the pin sleeve 47. A spring 49 is wound around the surface of the pin 48. The two ends of the spring 49 are fixedly installed with the end face of the pin sleeve 47 and the end of the pin 48, respectively. A pin seat 410 is fixedly installed on the surface of the filter cartridge 45. The end of the pin 48 away from the spring 49 is inserted and connected to the inside of the pin seat 410. By pulling the pin 48, the filter cartridge 45 can be quickly disassembled and assembled from the air inlet end of the air pump 40, which is convenient for periodic replacement or cleaning of the filter screen 46. The spring 49 provides preload force to ensure that the pin 48 will not come out of the pin seat 410 during normal use.

[0031] The movable frame 34 has a servo cylinder 4001 fixedly mounted on its surface. The servo cylinder 4001 has a piston rod 2 for driving extension and retraction inside, and a servo motor 4002 is fixedly mounted at the end of the piston rod 2. The servo motor 4002 has a rotating shaft 4 for driving, and a flexible brush 4003 is fixedly mounted at the end of the rotating shaft 4. When pneumatic blowing cannot completely remove stubborn deposits, the servo cylinder 4001 can push the flexible brush 4003 towards the outer wall of the pipe. The servo motor 4002 drives the flexible brush 4003 to rotate, gently brushing the surface of the pipe to help remove stubborn stains, further improve surface cleanliness, and create good coupling conditions for ultrasonic testing.

[0032] A method for measuring the thickness of a glass tube includes: S1, power-on self-test and adaptive adjustment of the measuring platform. The main power supply of the device is started, and the control system executes the power-on self-test program to confirm that all electrical components of the support mechanism 1, clamping mechanism 2, detection mechanism 3 and cleaning mechanism 4 are in normal communication and reset. After the self-test is passed, the control system issues a command to start the servo motor 17 in the support mechanism 1. The servo motor 17 drives the threaded rod 13 to rotate in the rod sleeve 12 through the coupling. The rotation of the threaded rod 13 is converted into the linear sliding of the adjustment plate 18 on the support platform 10 through the cooperation of the threaded cylinder 14 and the limit block 16. According to the actual length parameters of the pipe body 1007 to be measured, the control system automatically moves the adjustment plate 18 to a distance position adapted to the positioning plate 110. At the same time, the roller 1001 rolls on the surface of the support platform 10 to assist the movement, so that the bearing span of the device is precisely matched with the length of the pipe body 1007 to be measured, and the adaptive initial adjustment of the measuring platform is completed. S2. Glass tube hoisting and axial reference positioning: Through external hoisting or manual assistance, the pipe body 1007 to be tested is stably hoisted onto the rubber roller 1005 on the upper end of the adjusting plate 18 and the positioning plate 110. The pipe body 1007 to be tested is slowly pushed to move along the axial direction, so that one end face of it is in close contact with the surface of the baffle 1008 fixedly installed on one side of the positioning plate 110. The contact sensor installed on the baffle 1008 feeds back the signal that the pipe has been in position to the control system. Relying on the limiting effect of the baffle 1008, the measurement reference zero point of the pipe body 1007 to be tested in the axial direction is determined, so as to ensure that the axial coordinates of all subsequent test sections are consistent and accurate. S3. Automatic radial centering and clamping of the pipeline: The control system starts the clamping mechanism 2. The servo motor 25 on the side platform 20 drives the shaft 23 to rotate in the two bushings 22 according to the preset torque value. The two sections of external threads 24 of the same specification on the surface of the shaft 23 rotate synchronously, driving the two threaded bushings 26 to drive the limit rod 27 to move in opposite directions along the limit hole 29. The arc-shaped rubber clamp 28 fixedly installed on the upper end of the limit rod 27 moves synchronously from both sides toward the central axis of the pipeline body 1007 under test until the inner arc surfaces of the two clamps 28 are tightly attached to the outer wall of the pipeline. When the drive current of the servo motor 25 reaches the preset clamping torque threshold, the control system determines that the clamping is in place. The servo motor 25 immediately enters the self-locking state, completing the radial centering and firm clamping of the pipeline body 1007 under test, ensuring that the pipeline does not become eccentric or move during subsequent rotation measurement. S4. Multi-stage composite cleaning treatment of the outer wall of the pipeline. The control system starts the cleaning mechanism 4. First, the air pump 40 is turned on. After the external air is filtered and purified by the filter screen 46 in the filter cartridge 45, it is delivered to the blowing pipe 42 through the air supply pipe 41 and finally sprayed out from the inclined high-pressure air nozzle 43 to blow the surface of the pipeline body 1007 under high pressure to remove floating dust. At the same time, the servo cylinder 2 4001 on the moving frame 34 receives the command and drives the piston rod 2 to extend according to the preset stroke, pushing the servo motor 4002 forward, so that the flexible brush 4003 at the end presses lightly on the outer wall of the pipeline with the set contact force. The servo motor 4002 then starts and drives the flexible brush 4003 to rotate at the preset speed to brush and clean the surface of the pipeline. After the blowing and brushing work together for a preset time, the control system issues a command, and the servo cylinder 2 4001 drives the flexible brush 4003 to reset and retract. The high-pressure air nozzle 43 continues to spray air for 2-3 seconds until the residual debris is completely blown away, ensuring that the measurement surface is clean and free of interference. S5. Electrically controlled transverse positioning and cross-sectional circumferential wall thickness acquisition of the detection mechanism: After cleaning, the control system sends a transverse command to the guide rail drive unit of the detection mechanism 3. Under electrical control, the guide rail slide 33 moves precisely in a straight line along the guide rail 30. Through the built-in magnetic grating or optical grating ruler closed-loop feedback, the moving frame 34 is precisely positioned at the first preset measurement cross-section position on the pipe body 1007 being tested. The positioning accuracy is controlled within ±0.02mm. After reaching the specified coordinates, the control system activates the servo cylinder 35, the piston rod extends vertically, and the probe 36 descends until its detection end face is tightly closed. The device stably adheres to the outer wall of the pipe. The adhesion pressure is fed back in real time and maintained constant by the pressure sensor built into the servo cylinder 35. Subsequently, the control system starts the servo motor 1006, which drives the rubber roller 1005 to rotate at a set speed through the shaft 1004. Using friction, the pipe body 1007 under test rotates uniformly around its own axis for one full revolution under the clamping and limiting position of the clamping plate 28. During this period, the ultrasonic detector 37 continuously emits and receives ultrasonic signals through the probe 36, and collects the 360° circumferential wall thickness of the cross-section in real time. The data is automatically uploaded and stored in the memory of the control system. S6. After the electronically controlled axial displacement completes multi-point scanning and material retraction, and the current cross-sectional circumference measurement is finished, the control system issues a command. Servo cylinder 35 drives probe 36 to retract and lift to a safe height. Subsequently, the guide rail drive unit restarts, and the guide rail slide 33, under electronic control, precisely slides along the guide rail 30 to the next preset axial measurement cross-sectional coordinate position. Upon arrival, it automatically repeats the probe contact, pipe rotation, and data acquisition actions in step S5. Following the system's preset measurement scheme, it sequentially completes the wall thickness measurement of all marked points. After all measurement tasks are completed, the control system... The control system issues a reset command: servo cylinder 35 drives probe 36 to reset to the initial safe height, servo motor 1006 stops, servo cylinder 4001 and flexible brush 4003 remain in the retracted state, air pump 40 is turned off, servo motor 25 of clamping mechanism 2 rotates in the opposite direction a set number of times according to the control system command, driving clamping plate 28 to expand outward synchronously to the initial release position, the control system generates a complete measurement report on the display screen, prompting the operator that the measurement is complete, the operator lifts or rolls the measured pipe body 1007 off the rubber roller 1005, and the measurement work is completely finished.

[0033] The invention is used as follows: When in use, the servo motor 17 drives the threaded rod 13 to rotate under the support of the sleeve 12. The threaded cylinder 14 is restricted by the sliding fit between the limiting block 16 and the limiting hole 15 and cannot rotate. It moves axially along the threaded rod 13, which drives the adjusting plate 18 to translate relative to the support platform 10. The roller 1001 rolls on the surface of the support platform 10 to provide stable support and reduce frictional resistance. The adjusting plate 18 and the positioning plate 110 fixed on the connecting platform 19 together form a variable span rolling support structure. The rubber rollers 1005 symmetrically arranged at the upper ends of the two rollers roll in contact with the surface of the pipe body 1007 being measured to support the weight of the pipe. The baffle 1008 on one side of the positioning plate 110 is in close contact with the pipe end face to achieve axial limitation, preventing the pipe from shifting axially during subsequent rotation and ensuring the stability of the pipe position during the measurement process. After the servo motor 1006 is started, the rotating shaft 1 drives the shaft 1004 to rotate through the coupling. The rubber roller 1005 fixedly sleeved on the surface of the shaft 1004 rotates synchronously. The rubber roller 1005 rolls in contact with the surface of the pipe body 1007 being measured. The friction between the two drives the pipe to rotate around its own axis. The operator controls the rotation angle of the servo motor 1006 to make the pipe rotate intermittently at a set angle, thereby realizing the sequential positioning of multiple measurement points on the outer wall of the pipe. This rotation drive method does not require direct clamping of the pipe, avoiding scratches or stress concentration on the surface of the glass tube, while ensuring accurate switching of the circumferential measurement position, providing conditions for a comprehensive evaluation of the pipe wall thickness uniformity. Servo motor 25 drives shaft 23 to rotate under the support of bushing 22. Two sections of external threads 24 with opposite directions of rotation on the surface of shaft 23 engage with two threaded sleeves 26 respectively. The threaded sleeves 26 are restricted by the sliding fit between the limiting rod 27 and the limiting hole 29 and cannot rotate. They move axially along shaft 23. Since the two sections of external threads 24 have opposite directions of rotation, the two threaded sleeves 26 move synchronously towards or away from each other. Through the limiting rod 27, the upper clamping plate 28 moves synchronously closer to or away from the center of the pipe. The clamping plate 28 is an arc-shaped rubber plate with an inner arc surface that fits the outer wall of the pipe. When clamping, it fits the pipe surface evenly and uses the elastic deformation of the rubber to provide a uniform radial clamping force. This ensures that the pipe does not shake or move axially during the measurement process and avoids scratching the glass surface, achieving rapid centering clamping and release. Air pump 40 pressurizes clean air filtered by filter screen 46 inside filter cartridge 45 and sends it to air blowing pipe 42 through air delivery pipe 41. High-pressure air nozzle 43, which is inclined at the end of air blowing pipe 42, sprays high-pressure airflow at a certain angle to the area in front of the measurement position of probe 36, effectively blowing away dust and particulate matter on the surface of the pipe. Air blowing pipe 42 slides through the sleeve 44 on the surface of moving frame 34 and can move synchronously with moving frame 34 and be finely adjusted axially to align with pipes of different diameters. When stubborn deposits cannot be pneumatically blown away, servo cylinder 4001 pushes servo motor 4002 and flexible brush 4 003 moves towards the outer wall of the pipe, and the servo motor 4002 drives the flexible brush 4003 to rotate and gently brush. The electric linear slide TSAxx-B series drives the guide rail slide 33 to slide along the guide rail 30, realizing the overall axial position adjustment of the detection mechanism 3. The servo cylinder 35 pushes the probe 36 to move perpendicular to the outer wall of the pipe and fit tightly. The ultrasonic detector 37 emits and receives ultrasonic signals through the probe 36 and converts them into thickness values ​​to achieve high-precision measurement. The filter cartridge 45 is quickly disassembled and assembled with the pin 48 and the pin seat 410, which is convenient for regular replacement or cleaning of the filter screen 46.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A glass tube thickness measuring device, comprising a support mechanism (1), characterized in that: The support mechanism (1) is provided with a clamping mechanism (2) for measuring and positioning the glass tube, and a detection mechanism (3) for measuring the glass tube is provided on one side of the support mechanism (1). The detection mechanism (3) is provided with a cleaning mechanism (4) for removing dust from the outer wall of the glass tube. The support mechanism (1) includes a support platform (10). Two adjustment plates (18) and a positioning plate (110) of the same specifications are respectively arranged above the support platform (10). Rubber rollers (1005) are symmetrically arranged at the upper end of the adjustment plate (18) and the upper end of the positioning plate (110). The surface of the rubber roller (1005) is in rolling contact with the pipe body (1007) to be tested. The clamping mechanism (2) includes a side platform (20). The side platform (20) is fixedly installed on one side of the adjusting plate (18) by a bracket. Clamping plates (28) are symmetrically distributed above the side platform (20). The clamping plates (28) are arc-shaped rubber plates. The two clamping plates (28) are attached to the outer wall of the pipe body (1007) to be tested. The detection mechanism (3) includes a movable frame (34), which is an L-shaped structure. A servo cylinder (35) is embedded in the upper horizontal end of the movable frame (34). A piston rod for driving extension and retraction is provided inside the servo cylinder (35), and a probe (36) is fixedly installed at the end of the piston rod.

2. The glass tube thickness measuring device according to claim 1, characterized in that: The lower end of the support platform (10) is equipped with a support leg (11). The support platform (10) has an inner cavity (111) inside. Both sides of the inner wall of the inner cavity (111) are fixed with rod sleeves (12). A threaded rod (13) is rotatably installed between the two rod sleeves (12). One end of the support platform (10) is fixedly installed with a servo motor (17) through a bracket. The servo motor (17) has a rotating shaft for driving inside. The end of the rotating shaft and the threaded rod (13) are connected by a coupling.

3. The glass tube thickness measuring device according to claim 2, characterized in that: The threaded rod (13) is threaded with a threaded cylinder (14). A limit block (16) is fixedly installed on the outer wall of the threaded cylinder (14). The upper end of the limit block (16) is fixed to the lower end of the adjusting plate (18). A limit hole (15) is opened at the upper end of the inner wall of the inner cavity (111). The surface of the limit block (16) is slidably attached to the inner wall of the limit hole (15). A connecting platform (19) is also fixedly installed at the upper end of the support platform (10). The upper end of the connecting platform (19) is fixed to the lower end of the positioning plate (110).

4. The glass tube thickness measuring device according to claim 1, characterized in that: Rollers (1001) are symmetrically installed at the lower end of the adjusting plate (18). The rollers (1001) are in rolling contact with the surface of the support platform (10). Side plates (1002) are symmetrically installed at the upper end of the adjusting plate (18) and the upper end of the positioning plate (110). A bushing (1003) is embedded in the side plate (1002).

5. The glass tube thickness measuring device according to claim 4, characterized in that: The two bushings (1003) located on one side are rotatably mounted with the same shaft (1004). A rubber roller (1005) is fixedly sleeved on the surface of the shaft (1004). A servo motor (1006) is also fixedly mounted on the surface of the side plate (1002) by a bracket. The servo motor (1006) has a rotating shaft (2) for driving inside. The end of the rotating shaft (2) is connected to the shaft (1004) by a coupling. A baffle (1008) is fixedly mounted on one side of the positioning plate (110). One side of the baffle (1008) is tightly attached to the end face of the pipe body (1007) being measured.

6. The glass tube thickness measuring device according to claim 1, characterized in that: The side platform (20) has an inner cavity two (21) inside. Both sides of the inner cavity two (21) are fitted with bushing two (22). The same shaft two (23) is rotatably installed inside the two bushing two (22). The outer end of the side platform (20) is fixedly installed with a servo motor three (25) through a bracket. The servo motor three (25) has a rotating shaft three for driving inside. The end of the rotating shaft three is connected to the shaft two (23) through a coupling. The surface of the shaft two (23) is symmetrically provided with two sections of external threads (24) of the same specification. A threaded sleeve (26) is threaded on any section of the external thread (24). A limit rod (27) is fixedly installed on the surface of the threaded sleeve (26). A limit hole two (29) is opened at the upper end of the inner wall of the inner cavity two (21) and penetrates it. The surface of the limit rod (27) slides and fits tightly against the inner wall of the limit hole two (29). A clamping plate (28) is fixedly installed at the upper end of the limit rod (27).

7. The glass tube thickness measuring device according to claim 1, characterized in that: A guide rail sub-rail (30) is fixedly installed on one side of the support platform (10). A reinforcing rib (31) is installed at both ends of one side of the guide rail sub-rail (30). The other end of the reinforcing rib (31) is fixed to the end face of the support platform (10). Anti-detachment blocks (32) are fixedly installed at both ends of the guide rail sub-rail (30). A guide rail sub-slide (33) is slidably provided on the surface of the guide rail sub-rail (30). The guide rail sub-rail (30) and the guide rail sub-slide (33) form a linear guide rail pair. A movable frame (34) is fixedly mounted on the surface of the guide rail sub-slide (33). An ultrasonic detector (37) for detecting the thickness of the pipe body (1007) under test is fixedly installed at the lower horizontal end of the movable frame (34). The ultrasonic detector (37) is electrically connected to the probe (36) through a data cable.

8. The glass tube thickness measuring device according to claim 1, characterized in that: The cleaning mechanism (4) includes an air pump (40). The air pump (40) has an air supply pipe (41) connected to its outlet flange, and an air blowing pipe (42) connected to the other end flange of the air supply pipe (41). The end of the air blowing pipe (42) is inclined, and a high-pressure air nozzle (43) is fixedly connected to the end of the air blowing pipe (42). The high-pressure air nozzle (43) fits into the surface of the pipe body (1007) being tested. A sleeve (44) is fixedly fixed through the surface of the moving frame (34). The air blowing pipe (42) slides through the sleeve (44). The air inlet end of the air pump (40) is covered with... The cover is provided with a filter cartridge (45), and a filter screen (46) is embedded inside the filter cartridge (45). A pin sleeve (47) is symmetrically fixed on the air inlet end of the air pump (40) by a bracket. A pin (48) is slidably sleeved inside the pin sleeve (47). A spring (49) is wound around the surface of the pin (48). The two ends of the spring (49) are fixedly installed with the end face of the pin sleeve (47) and the end of the pin (48) respectively. A pin seat (410) is fixedly installed on the surface of the filter cartridge (45). The end of the pin (48) away from the spring (49) is inserted and connected to the inside of the pin seat (410).

9. The glass tube thickness measuring device according to claim 1, characterized in that: The surface of the movable frame (34) is fixedly mounted with a servo cylinder two (4001). The servo cylinder two (4001) is provided with a piston rod two for driving extension and retraction, and a servo motor four (4002) is fixedly mounted at the end of the piston rod two. The servo motor four (4002) is provided with a rotating shaft four for driving, and a flexible brush (4003) is fixedly mounted at the end of the rotating shaft four.

10. A method for measuring the thickness of a glass tube according to any one of claims 1-9, characterized in that, include: S1. The system performs a power-on self-test to confirm that all electrical components are communicating normally. Then, the servo motor (17) drives the threaded rod (13) to rotate, and drives the adjusting plate (18) to slide linearly through the threaded cylinder (14). According to the length parameters of the pipe body (1007) being measured, the adjusting plate (18) is automatically adjusted to the distance position that is compatible with the positioning plate (110) to complete the initial adjustment of the measurement platform. S2. The pipe body (1007) to be measured is suspended on the rubber roller (1005) and pushed axially so that its end face is in close contact with the baffle (1008). The sensor on the baffle feeds back the positioning signal to the control system to determine the axial measurement reference zero point. S3. The control system starts the servo motor three (25), drives the shaft two (23) to rotate, and the two external threads (24) drive the two threaded sleeves (26) to move towards each other, so that the arc-shaped rubber clamp (28) clamps the outer wall of the pipe from both sides simultaneously. When the driving current reaches the clamping torque threshold, the motor self-locks and completes the radial centering clamping. S4. The control system starts the air pump (40), and the high-pressure air nozzle (43) blows the surface of the pipe. At the same time, the servo cylinder two (4001) pushes the flexible brush (4003) to contact the pipe wall, and the servo motor four (4002) drives the brush to rotate and brush. After brushing is completed, the brush is reset, and the high-pressure air nozzle continues to spray air for 2-3 seconds to completely blow away the residual debris. S5. The guide rail slide (33) moves precisely along the guide rail (30) under the electric control drive, positioning the moving frame (34) to the preset measurement section. Servo cylinder one (35) pushes the probe (36) to fit against the pipe wall. Servo motor two (1006) drives the rubber roller (1005) to rotate, causing the pipe to rotate at a uniform speed for one revolution. The ultrasonic detector (37) continuously collects the 360° circumferential wall thickness data of the section through the probe. S6. The probe retracts and lifts, and the guide rail slide is electrically driven to move to the next preset section. Repeat step S5 to complete all point measurements. After all tasks are completed, all actuators automatically reset, the clamp (28) expands and loosens, the pipe is removed, and the measurement ends.

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