Quartz glass tube expanding diameter detection device and detection method based on precise positioning

Abstract

The invention discloses a quartz glass pipe expanding diameter detection device and detection method based on precise positioning, and relates to the technical field of pipeline diameter detection. The device comprises a conveying belt, a pipe expanding push-pull mechanism, a pipe expanding fixing mechanism, a pipe expanding inner diameter detection mechanism and a detection push-pull mechanism. A pipe expanding push-pull mechanism is mounted on one side of the output end of the conveying belt, and a pipe expanding fixing mechanism is mounted on the other side; the tail end of the pipe expanding inner diameter detection mechanism is installed at the front end of the detection push-pull mechanism, and the pipe expanding inner diameter detection mechanism and the detection push-pull mechanism are located on the same straight line. The pipe expanding inner diameter detection mechanism comprises a heat preservation outer sleeve, a ventilation pipeline combination, an adjusting installation column and a plurality of inner diameter detection assemblies. The air pressure adjusting detection ejector pin extends out to abut against the quartz glass expanded pipe, the extending lengths are different, and the internal air pressure is different, so that the extending lengths are judged according to the air pressure, the inner diameter is judged for detection, and the problems that existing pipeline inner diameter detection is troublesome, operation is tedious, and the detection precision is low are solved.

Description

Technical Field

[0001] This invention belongs to the field of pipe diameter detection technology, and in particular relates to a diameter detection device and method for quartz glass pipe expansion based on precise positioning. Background Technology

[0002] Quartz glass tube expansion is the process of widening one end of a quartz glass tube. The principle is that the coefficient of thermal expansion of quartz glass is much smaller than that of ordinary glass. Therefore, by heating the quartz glass tube, it can be deformed, achieving the purpose of tube expansion. However, after expansion, whether its diameter meets the standard requires diameter testing, primarily inner diameter testing. Once the inner diameter is determined, the wall thickness is also determined. However, inner diameter testing is relatively complicated. Using laser-based testing methods can lead to low accuracy and large errors due to light refraction within the tube. Using calipers is cumbersome to operate and the readings are often inaccurate. Summary of the Invention

[0003] The purpose of this invention is to provide a diameter detection device and method for quartz glass tube expanders based on precise positioning. By adjusting the air pressure, the detection pin extends and abuts against the quartz glass expander. Different extension lengths result in different internal air pressures. Therefore, the extension length is determined by the air pressure, thereby determining the inner diameter for detection. This solves the problems of cumbersome operation and low detection accuracy in existing pipe inner diameter detection methods.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a diameter detection device for quartz glass tube expansion based on precise positioning, comprising a conveyor belt, a tube expansion push-pull mechanism, a tube expansion fixing mechanism, a tube expansion inner diameter detection mechanism, and a detection push-pull mechanism; The conveyor belt has a tube expansion and push-pull mechanism installed on one side of its output end and a tube expansion and fixing mechanism installed on the other side. The tube expansion and push-pull mechanism and the tube expansion and fixing mechanism are on the same straight line. The tail end of the tube expansion inner diameter detection mechanism is installed on the front end of the detection push-pull mechanism. The tube expansion inner diameter detection mechanism and the detection push-pull mechanism are on the same straight line. The detection push-pull mechanism can push the tube expansion inner diameter detection mechanism into and pull it out of the quartz glass tube expansion. The pipe expansion inner diameter detection mechanism includes an insulation outer tube, a ventilation pipe assembly, an adjustment mounting column, and multiple inner diameter detection components. The multiple inner diameter detection components are sequentially fixedly connected to form a straight line arrangement. The adjustment mounting column is a convex cylinder. The tail end of the last inner diameter detection component is fixed to the front end of the convex cylinder. The tail end of the insulation outer tube is fitted over the convex cylinder. An air inlet pipe and two air outlet pipes are inserted into the adjustment mounting column. The air inlet pipe is inserted into the tail end of the insulation outer tube, and the two air outlet pipes run along the inner wall of the insulation outer tube to the front end. The front end of the insulation outer tube is provided with a plug.

[0005] The present invention is further configured such that the inner diameter detection assembly includes a pneumatic cylinder, a precision piston, a hydraulic cylinder, an adjusting bolt column, a detection pin, and a precision barometer. The left end of the pneumatic cylinder is provided with a staged mounting column frame. The adjusting bolt column is embedded with a hydraulic cylinder. The end of the telescopic shaft of the hydraulic cylinder is fixed with a precision piston. The pneumatic cylinder is provided with a piston chamber and a pneumatic chamber from the left end to the right end. The precision piston is movably inserted into the piston chamber. The pneumatic cylinder is provided with a plurality of pin holes evenly distributed on the circumferential side wall at the position of the pneumatic chamber. The right end of the pneumatic cylinder is provided with a barometer insertion hole communicating with the pneumatic chamber. A detection pin is inserted into each pin hole. The precision barometer is sealed and inserted into the barometer insertion hole, and the probe part is located in the pneumatic chamber. The lower half of the detection pin is a precision cylinder and the upper half is a thin cylinder. The heat-insulating outer sleeve is provided with fine holes that match the thin cylinder.

[0006] The invention is further configured such that, before detection, one-third of the precision piston is inserted into the piston cavity, while two-thirds of the piston cavity is not filled with the precision piston. The volume of the two-thirds section of the piston cavity is twice the volume of the air pressure chamber. The detection pin is restricted by the heat-insulating outer sleeve and will not completely come out of the pin hole.

[0007] The present invention is further configured such that the detection push-pull mechanism and the adjustment mounting column are connected by a connecting assembly, the connecting assembly including a connecting sleeve, a rotary servo motor and two bearings, four connecting columns are provided around the outer wall of the rear end of the connecting sleeve, two bearings are fitted on the cylindrical part of the rear half of the adjustment mounting column and the two bearings are inserted into the connecting sleeve, the rotary servo motor is embedded in the front end of the detection push-pull mechanism 6, the shaft of the rotary servo motor is inserted in the axial position of the rear end of the adjustment mounting column, and the connecting column is fixed on the outer wall of the front end of the detection push-pull mechanism.

[0008] The present invention is further configured such that the tube expansion push-pull mechanism includes a push-pull structure and a fixed plug component that are the same as the detection push-pull mechanism. The push-pull structure includes a square sleeve, a square telescopic rod, a telescopic servo motor, and a telescopic lead screw. The telescopic servo motor is embedded in the bottom of the square sleeve, and the telescopic lead screw is connected to the shaft of the telescopic servo motor. The telescopic lead screw is spirally inserted from the center of the rear end of the square telescopic rod, and the rear end of the square telescopic rod is movably inserted into the square sleeve. The fixed plug component includes a circular insert and four compression cylinders. Compression cylinders are evenly embedded in the circumference of the circular insert. Compression sponge blocks are installed at the shaft ends of the compression cylinders. One end of the circular insert is fixed to the front end of the square telescopic rod.

[0009] The invention is further configured such that the tube expansion fixing mechanism includes a sleeve and multiple extrusion positioning components. The sleeve has three rings of equally spaced mounting holes. The extrusion positioning components include an extrusion sleeve, a cylindrical telescopic rod, and rollers. The cylindrical telescopic rod has two slide rails on its two side walls. The extrusion sleeve has two sliding grooves that match the slide rails on its inner wall. An extrusion motor is located at the bottom of the extrusion sleeve. An extrusion screw is connected to the shaft of the extrusion motor. The extrusion screw spirals through the cylindrical telescopic rod from its tail end. A roller is installed at the front end of the cylindrical telescopic rod. The rolling direction of the roller is parallel to the axis of the sleeve.

[0010] The present invention is further configured such that the surface of the conveyor belt is provided with expansion tube placement grooves 11 at equal intervals.

[0011] The method for measuring the diameter of quartz glass tube expanders based on precise positioning employs a device for measuring the diameter of quartz glass tube expanders based on precise positioning. The specific measurement steps are as follows: S1: Place the quartz glass expander tubes one by one onto the conveyor belt. When the quartz glass expander tube reaches the position of the expander tube push-pull mechanism and is detected, immediately stop the operation of the conveyor belt. The expander tube push-pull mechanism fixes one end of the quartz glass expander tube and slowly pushes the other end into the expander tube fixing mechanism for fixing. S2: Before testing, constant temperature gas is introduced into the insulation outer tube for insulation. The tube expansion inner diameter testing mechanism is inserted into the inside from one end of the quartz glass tube expansion, so that multiple sets of inner diameter testing components are all inside the quartz glass tube expansion. The inner diameter testing components are started to test. Each inner diameter testing component detects a set of data at a different position in the quartz glass tube expansion, forming multiple sets of data. The testing is stopped. The tube expansion inner diameter testing mechanism is then rotated to move the angle, and the test is performed again, forming two sets of test data. S3: After the test is completed, the data is uploaded to the computer for analysis to determine whether the diameter of the quartz glass tube just tested meets the requirements and is marked. S4: The tube expansion push-pull mechanism pulls the inspected quartz glass tube back onto the conveyor belt and outputs it. Then, the next quartz glass tube continues to be transported to the tube expansion push-pull mechanism for inspection preparation.

[0012] The present invention is further configured such that the inner diameter detection component uses the aforementioned defined structure for detection, and the specific detection operation is as follows: S1, the precision piston slowly and completely pushes the gas in the piston chamber into the pressure chamber, pressurizing the pressure chamber to slowly push the detection pin outward; S2, during the process of the detection pin slowly pushing outward, when the tops of all the thin cylinders touch the inner wall of the quartz glass expansion tube, the pressure in the pressure chamber is stable, and the precision barometer will detect a stable pressure; S3, since the average ejection length of the detection pin determines the pressure in the pressure chamber, the average ejection length of the detection pin is determined by detecting the pressure with the precision barometer, thereby determining the inner diameter of the quartz glass expansion tube to achieve the detection purpose.

[0013] The present invention has the following beneficial effects: 1. This invention can accurately feed quartz glass tubes one by one into the tube expansion fixing mechanism for fixation. At this time, the tube expansion inner diameter detection mechanism is inserted into the quartz glass tube to detect the inner diameter of the tube. It does not require laser detection or caliper detection, has high detection accuracy, and is fully automated, which can complete the efficient and accurate diameter detection.

[0014] 2. This invention utilizes the difference in gas volume and pressure caused by changes in the cavity to perform detection. When the same volume of gas (inert gas, nitrogen) is filled into the pressure chamber, the pressure changes due to the different extension distances of the detection pins and the change in the space of the pin holes (equivalent to an increase in the gas chamber). The extension length (average value) of the detection pins is determined by the pressure value, thereby determining the inner diameter. Through a precisely designed structure, high accuracy can be achieved, down to the millimeter level.

[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a diameter detection device for quartz glass tube expansion based on precise positioning.

[0018] Figure 2 This is a schematic diagram of the exploded structure of a diameter detection device for quartz glass tube expansion based on precise positioning.

[0019] Figure 3 This is a schematic diagram of the exploded structure of a pipe expansion inner diameter testing mechanism.

[0020] Figure 4 This is a schematic diagram of the exploded structure of the extrusion positioning component.

[0021] Figure 5 This is a schematic diagram of the pneumatic cylinder structure.

[0022] The attached diagram lists the components represented by each number as follows: 1. Conveyor belt; 11. Pipe expansion placement groove; 2. Pipe expansion push-pull mechanism; 21. Square sleeve; 22. Telescopic servo motor; 23. Square telescopic rod; 24. Circular insert; 25. Extrusion cylinder; 3. Pipe expansion fixing mechanism; 30. Extrusion positioning component; 31. Fixing sleeve; 32. Extrusion sleeve; 33. Extrusion screw; 34. Cylindrical telescopic rod; 341. Slide rail; 35. Roller; 4. Pipe expansion inner diameter detection mechanism; 41. Insulated outer sleeve; 411 412. Air outlet pipe; 42. Air inlet pipe; 5. Blockage; 6. Connecting assembly; 71. Adjusting mounting post; 52. Connecting sleeve; 73. Detection push-pull mechanism; 64. Rotation servo motor; 75. Inner diameter detection assembly; 76. Air cylinder; 77. Piston chamber; 78. Air chamber; 79. Ejector pin hole; 70. Barometer insertion hole; 71. Precision barometer; 72. Detection ejector pin; 73. Precision piston; 74. Adjusting bolt post; 75. Hydraulic cylinder. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-5 The present invention is a diameter detection device for quartz glass tube expansion based on precise positioning, comprising a conveyor belt 1, a tube expansion push-pull mechanism 2, a tube expansion fixing mechanism 3, a tube expansion inner diameter detection mechanism 4, and a detection push-pull mechanism 6; The conveyor belt 1 is equipped with a tube expansion and push-pull mechanism 2 on one side of its output end and a tube expansion and fixing mechanism 3 on the other side. The tube expansion and push-pull mechanism 2 and the tube expansion and fixing mechanism 3 are on the same straight line. The tail end of the tube expansion inner diameter detection mechanism 4 is installed on the front end of the detection push-pull mechanism 6. The tube expansion inner diameter detection mechanism 4 and the detection push-pull mechanism 6 are on the same straight line. The detection push-pull mechanism 6 can push the tube expansion inner diameter detection mechanism 4 into and pull it out of the quartz glass tube expansion. The pipe expansion inner diameter detection mechanism 4 includes an insulation outer tube 41, a ventilation pipe assembly, an adjustment mounting column 51, and multiple inner diameter detection components 7. The multiple inner diameter detection components 7 are sequentially fixedly connected to form a straight line arrangement. The adjustment mounting column 51 is a convex cylinder. The tail end of the last inner diameter detection component 7 is fixed to the front end of the convex cylinder. The tail end of the insulation outer tube 41 is sleeved on the convex cylinder. An air inlet pipe 412 and two air outlet pipes 411 are inserted into the adjustment mounting column 51. The air inlet pipe 412 is inserted into the tail end of the insulation outer tube 41. The two air outlet pipes 411 run along the inner wall of the insulation outer tube 41 to the front end. A plug 42 is provided at the front end of the insulation outer tube 41.

[0025] The tube expansion push-pull mechanism 2 can insert the end into the end of the quartz glass expansion tube. The end of the quartz glass expansion tube is fixed by the external support of the end of the tube expansion push-pull mechanism 2. Then, the end of the quartz glass expansion tube is pushed into the tube expansion fixing mechanism 3. The tube expansion fixing mechanism 3 can fix the outer wall of the quartz glass expansion tube, and the axis of the quartz glass expansion tube is close to the axis of the tube expansion inner diameter detection mechanism 4. At this time, the tube expansion inner diameter detection mechanism 4 is started for detection. Before detection, constant temperature gas (25℃) is introduced to keep the internal temperature of the heat insulation outer tube 41 constant, so as to reduce the influence of temperature on the detection. Air enters through the air inlet pipe 412, flows to the tail end of the heat insulation outer tube 41, and then flows out from the front end to the rear end through the two air outlet pipes 411, so that the inner diameter detection component 7 is kept at a constant temperature (temperature error less than 1℃).

[0026] The inner diameter detection assembly 7 includes a pneumatic cylinder 71, a precision piston 74, a hydraulic cylinder 751, an adjusting bolt column 75, a detection pin 73, and a precision barometer 72. The pneumatic cylinder 71 has a staged mounting column frame at its left end. The hydraulic cylinder 75 is embedded in the adjusting bolt column 75. The precision piston 74 is fixed at the end of the telescopic shaft of the hydraulic cylinder 751. The pneumatic cylinder 71 has a piston chamber 711 and a pneumatic chamber 712 arranged sequentially from the left end to the right end. The precision piston 74 is movably inserted into the piston chamber 711. The pneumatic cylinder 71 has a plurality of pin holes 713 evenly distributed on the circumference of the side wall at the position of the pneumatic chamber 712. The right end of the pneumatic cylinder 71 has a barometer insertion hole 714 communicating with the pneumatic chamber 712. A detection pin 73 is inserted into each pin hole 713. The precision barometer 72 is sealed and inserted into the barometer insertion hole 714, with the probe part located in the pneumatic chamber 712. The lower half of the detection pin 73 is a precision cylinder and the upper half is a thin cylinder. The heat-insulating outer sleeve 41 is provided with a fine hole that matches the thin cylinder.

[0027] The specific detection operation of the inner diameter detection component 7 is as follows: S1, the precision piston 74 slowly and completely pushes the gas in the piston chamber 711 into the pressure chamber 712, pressurizing the pressure chamber 712 to slowly push the detection pin 73 outward; S2, during the process of the detection pin 73 slowly pushing outward, when the top of all the thin cylinders touches the inner wall of the quartz glass expander, the air pressure in the pressure chamber 712 is stable, and the precision barometer 72 will detect a stable air pressure; S3, since the average ejection length of the detection pin 73 determines the air pressure in the pressure chamber 712, the average ejection length of the detection pin 73 is determined by detecting the air pressure by the precision barometer 72, thereby determining the inner diameter of the quartz glass expander to achieve the detection purpose.

[0028] Before testing, one-third of the precision piston 74 is inserted into the piston chamber 711, while two-thirds of the piston chamber 711 is not filled with the precision piston 74. The volume of the two-thirds section of the piston chamber 711 is twice the volume of the air pressure chamber 712. The detection pin 73 is restricted by the heat insulation outer sleeve 41 and will not completely come out of the pin hole 713.

[0029] The entire process is pushed out slowly to prevent the detection pin 73 from being pushed out too quickly and damaging the quartz glass expansion tube. After the gas is completely expelled, the pressure chamber 712 increases by three times (before expulsion, the internal pressure is one atmosphere). However, because the detection pin 73 is pushed outward a certain distance, the pin hole 713 will increase the gas chamber, thus increasing the gas capacity. Therefore, the gas pressure value is 1.5-2.0 times the standard atmospheric pressure. Due to the constant temperature measurement, the gas pressure is the sum of the sizes of the pressure chamber 712 and all the pin holes 713 (the gas-containing parts that communicate with the inside of the pressure chamber 712). Since the size of the pressure chamber 712 is constant, the total distance that all the detection pins 73 move outward is determined by the gas pressure value, thereby determining the inner diameter. The precision barometer 72 can achieve an accuracy of 2-5%, while a total distance error of about 1mm for the detection pins 73 will cause a gas pressure change of more than 5%. The pressure chamber 712 is relatively small, and the lower half of the detection pin 73 is thicker; displacement will significantly affect the gas pressure change.

[0030] The detection push-pull mechanism 6 is connected to the adjustment mounting column 51 by a connecting assembly 5. The connecting assembly 5 includes a connecting sleeve 52, a rotary servo motor 60, and two bearings. Four connecting columns are provided around the outer wall of the rear end of the connecting sleeve 52. Two bearings are fitted on the cylindrical part of the rear half of the adjustment mounting column 51 and are inserted into the connecting sleeve 52. The rotary servo motor 60 is embedded in the front end of the detection push-pull mechanism 6. The shaft of the rotary servo motor 60 is inserted into the axial position of the rear end of the adjustment mounting column 51. The connecting columns are fixed on the outer wall of the front end of the detection push-pull mechanism 6.

[0031] Rotating the servo motor 60 can cause the adjusting mounting column 51 to rotate by a certain angle, thereby causing the entire expansion tube inner diameter detection mechanism 4 to rotate by a fixed angle (less than 90°) for re-detection, in order to improve detection accuracy.

[0032] The expansion tube push-pull mechanism 2 includes a push-pull structure and a fixed plug component that are the same as those of the detection push-pull mechanism 6. The push-pull structure includes a square sleeve 21, a square telescopic rod 23, a telescopic servo motor 22, and a telescopic lead screw. The telescopic servo motor 22 is embedded in the bottom of the square sleeve 21, and the telescopic lead screw is connected to the shaft of the telescopic servo motor 22. The telescopic lead screw is spirally inserted from the center of the rear end of the square telescopic rod 23, and the rear end of the square telescopic rod 23 is movably inserted into the square sleeve 21. The fixed plug component includes a circular insert 24 and four compression cylinders 25. The compression cylinders 25 are evenly embedded on the circumference of the circular insert 24. A compression sponge block is installed at the shaft end of the compression cylinder 25. One end of the circular insert 24 is fixed to the front end of the square telescopic rod 23.

[0033] Both pushing and pulling are achieved by the telescopic servo motor 22 driving the telescopic screw to rotate, thereby pushing the square telescopic rod 23 to move back and forth. When the four extrusion cylinders 25 extend and retract synchronously, the extrusion sponge block is pressed against the inner wall of the quartz glass expander tube, thereby fixing the end of the quartz glass expander tube. As the quartz glass expander tube is gradually inserted into the expander tube fixing mechanism 3, the extrusion sponge block remains in a compressed state.

[0034] The tube expansion and fixing mechanism 3 includes a fixing sleeve 31 and multiple extrusion positioning components 30. The fixing sleeve 31 has three rings of equally spaced mounting holes. The extrusion positioning component 30 includes an extrusion sleeve 32, a cylindrical telescopic rod 34, and a roller 35. The cylindrical telescopic rod 34 has two slide rails 341 on its two side walls. The extrusion sleeve 32 has two sliding grooves that match the slide rails 341 on its inner wall. An extrusion motor is installed at the bottom of the extrusion sleeve 32. An extrusion screw 33 is connected to the shaft of the extrusion motor. The extrusion screw 33 spirally passes through the cylindrical telescopic rod 34 from its tail end. A roller 35 is installed at the front end of the cylindrical telescopic rod 34. The rolling direction of the roller 35 is parallel to the axis of the fixing sleeve 31.

[0035] The extrusion is initiated near the first ring extrusion positioning member 30. When the roller 35 contacts and extrudes, it not only serves to fix the object but also allows it to move along the roller 35. Then, it enters the second and third rings one by one, using the same operation to complete the fixing. Because after being pushed out, the conveyor belt no longer serves as a support and needs to be fixed one by one. It cannot wait until all of them are pushed out before fixing.

[0036] The conveyor belt 1 has equally spaced expansion slots 11 on its surface. This prevents the belt from rolling during transport and also allows for effective positioning.

[0037] The method for measuring the diameter of quartz glass tube expanders based on precise positioning employs a device for measuring the diameter of quartz glass tube expanders based on precise positioning. The specific measurement steps are as follows: S1: Place the quartz glass expanders one by one onto the conveyor belt 1. When the quartz glass expander reaches the position of the expander push-pull mechanism 2 and is detected, immediately stop the operation of the conveyor belt 1. The expander push-pull mechanism 2 fixes one end of the quartz glass expander and slowly pushes the other end into the expander fixing mechanism 3 for fixing. S2: Before testing, constant temperature gas is introduced into the insulation outer tube 41 for insulation. The tube expansion inner diameter detection mechanism 4 is inserted into the interior from one end of the quartz glass tube expansion, so that multiple sets of inner diameter detection components 7 are all inside the quartz glass tube expansion. The inner diameter detection components 7 are started to detect. Each inner diameter detection component 7 detects a set of data at a different position of the quartz glass tube expansion, forming multiple sets of data. The detection is stopped, and the tube expansion inner diameter detection mechanism 4 is rotated to move the angle, and the detection is performed again, forming two sets of detection data. S3: After the test is completed, the data is uploaded to the computer for analysis to determine whether the diameter of the quartz glass tube just tested meets the requirements and is marked. S4: The tube expansion push-pull mechanism 2 pulls the inspected quartz glass tube back onto the conveyor belt 1 and outputs it. Then, the next quartz glass tube continues to be transported to the tube expansion push-pull mechanism 2 for inspection preparation.

[0038] When an abnormal quartz glass tube expander is found, the system should be marked, either above the conveyor belt (where an easy-to-clean spraying device is installed above the output end).

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A diameter detection device for quartz glass tube expansion based on precise positioning, characterized in that: This includes a conveyor belt, a pipe expansion push-pull mechanism, a pipe expansion fixing mechanism, a pipe expansion inner diameter detection mechanism, and a detection push-pull mechanism; The conveyor belt has a tube expansion and push-pull mechanism installed on one side of its output end and a tube expansion and fixing mechanism installed on the other side. The tube expansion and push-pull mechanism and the tube expansion and fixing mechanism are on the same straight line. The tail end of the tube expansion inner diameter detection mechanism is installed on the front end of the detection push-pull mechanism. The tube expansion inner diameter detection mechanism and the detection push-pull mechanism are on the same straight line. The detection push-pull mechanism can push the tube expansion inner diameter detection mechanism into and pull it out of the quartz glass tube expansion. The pipe expansion inner diameter detection mechanism includes an insulation outer tube, a ventilation pipe assembly, an adjustment mounting column, and multiple inner diameter detection components. The multiple inner diameter detection components are sequentially fixedly connected to form a straight line arrangement. The adjustment mounting column is a convex cylinder. The tail end of the last inner diameter detection component is fixed to the front end of the convex cylinder. The tail end of the insulation outer tube is fitted over the convex cylinder. An air inlet pipe and two air outlet pipes are inserted into the adjustment mounting column. The air inlet pipe is inserted into the tail end of the insulation outer tube, and the two air outlet pipes run along the inner wall of the insulation outer tube to the front end. The front end of the insulation outer tube is provided with a plug.

2. The diameter detection device for quartz glass tube expansion based on precise positioning according to claim 1, characterized in that, The inner diameter detection assembly includes a pneumatic cylinder, a precision piston, a hydraulic cylinder, an adjusting bolt column, a detection pin, and a precision barometer. The left end of the pneumatic cylinder is provided with a staged mounting column frame. The adjusting bolt column is embedded with a hydraulic cylinder. The end of the telescopic shaft of the hydraulic cylinder is fixed with a precision piston. The pneumatic cylinder has a piston chamber and a pneumatic chamber in sequence from the left end to the right end. The precision piston is movably inserted into the piston chamber. The pneumatic cylinder has multiple pin holes evenly distributed on the circumference side wall of the pneumatic chamber. The right end of the pneumatic cylinder has a barometer insertion hole communicating with the pneumatic chamber. A detection pin is inserted into each pin hole. The precision barometer is sealed and inserted into the barometer insertion hole, with the probe part located in the pneumatic chamber. The lower half of the detection pin is a precision cylinder and the upper half is a thin cylinder. The heat-insulating outer sleeve is provided with fine holes that match the thin cylinder.

3. The diameter detection device for quartz glass tube expansion based on precise positioning according to claim 2, characterized in that, Before testing, one-third of the precision piston is inserted into the piston chamber, while two-thirds of the piston chamber is not filled with the precision piston. The volume of the two-thirds section of the piston chamber is twice the volume of the air pressure chamber. The testing pin is restricted by the heat-insulating outer sleeve and will not completely come out of the pin hole.

4. The diameter detection device for quartz glass tube expansion based on precise positioning according to claim 2, characterized in that, The detection push-pull mechanism is connected to the adjustment mounting column by a connecting assembly, which includes a connecting sleeve, a rotary servo motor, and two bearings. Four connecting columns are provided around the outer wall of the rear end of the connecting sleeve. Two bearings are fitted on the cylindrical part of the rear half of the adjustment mounting column and inserted into the connecting sleeve. The rotary servo motor is embedded in the front end of the detection push-pull mechanism. The shaft of the rotary servo motor is inserted into the axial position of the rear end of the adjustment mounting column. The connecting column is fixed on the outer wall of the front end of the detection push-pull mechanism.

5. The diameter detection device for quartz glass tube expansion based on precise positioning according to any one of claims 1 or 4, characterized in that, The expansion tube push-pull mechanism includes a push-pull structure and a fixed plug. The push-pull structure includes a square sleeve, a square telescopic rod, a telescopic servo motor, and a telescopic lead screw. The telescopic servo motor is embedded in the bottom of the square sleeve, and the telescopic lead screw is connected to the shaft of the telescopic servo motor. The telescopic lead screw is spirally inserted from the center of the rear end of the square telescopic rod, and the rear end of the square telescopic rod is movably inserted into the square sleeve. The fixed plug includes a circular insert and four compression cylinders. Compression cylinders are evenly embedded in the circumference of the circular insert. Compression sponge blocks are installed at the shaft ends of the compression cylinders. One end of the circular insert is fixed to the front end of the square telescopic rod.

6. The diameter detection device for quartz glass tube expansion based on precise positioning according to claim 1, characterized in that, The tube expansion and fixing mechanism includes a fixing sleeve and multiple extrusion positioning components. The fixing sleeve has three rings of equally spaced mounting holes. The extrusion positioning components include an extrusion sleeve, a cylindrical telescopic rod, and rollers. The cylindrical telescopic rod has two slide rails on its two side walls. The inner wall of the extrusion sleeve has two slide grooves that match the slide rails. An extrusion motor is located at the bottom of the extrusion sleeve. An extrusion screw is connected to the shaft of the extrusion motor. The extrusion screw spirals through the cylindrical telescopic rod from its tail end. A roller is installed at the front end of the cylindrical telescopic rod. The rolling direction of the roller is parallel to the axis of the fixing sleeve.

7. The diameter detection device for quartz glass tube expansion based on precise positioning according to claim 1, characterized in that, The conveyor belt has expansion slots at equal intervals on its surface.

8. A method for detecting the diameter of quartz glass tubes based on precise positioning, characterized in that, The diameter detection device for quartz glass tube expansion based on precise positioning, as described in any one of claims 1-7, is used for detection. The specific detection steps are as follows: S1: Place the quartz glass expander tubes one by one onto the conveyor belt. When the quartz glass expander tube reaches the position of the expander tube push-pull mechanism and is detected, immediately stop the operation of the conveyor belt. The expander tube push-pull mechanism fixes one end of the quartz glass expander tube and slowly pushes the other end into the expander tube fixing mechanism for fixing. S2: Before testing, constant temperature gas is introduced into the insulation outer tube for insulation. The tube expansion inner diameter testing mechanism is inserted into the inside from one end of the quartz glass tube expansion, so that multiple sets of inner diameter testing components are all inside the quartz glass tube expansion. The inner diameter testing components are started to test. Each inner diameter testing component detects a set of data at a different position in the quartz glass tube expansion, forming multiple sets of data. The testing is stopped. The tube expansion inner diameter testing mechanism is then rotated to move the angle, and the test is performed again, forming two sets of test data. S3: After the test is completed, the data is uploaded to the computer for analysis to determine whether the diameter of the quartz glass tube just tested meets the requirements and is marked. S4: The tube expansion push-pull mechanism pulls the inspected quartz glass tube back onto the conveyor belt and outputs it. Then, the next quartz glass tube continues to be transported to the tube expansion push-pull mechanism for inspection preparation.

9. The diameter detection method for quartz glass tube expanders based on precise positioning according to claim 8, characterized in that, The inner diameter detection component uses the structure defined in claim 2 for detection. The specific detection operation is as follows: S1, the precision piston slowly and completely pushes the gas in the piston chamber into the pressure chamber, and the pressure chamber is pressurized to slowly push the detection pin outward; S2, during the process of the detection pin slowly pushing outward, when the top of all the thin cylinders touches the inner wall of the quartz glass expansion tube, at this time, when the air pressure in the pressure chamber is stable, the precision barometer will detect a stable air pressure; S3. Since the average ejection length of the detection pin determines the pressure in the air chamber, the average ejection length of the detection pin is determined by measuring the air pressure with a precision barometer, thereby determining the inner diameter of the quartz glass expansion tube to achieve the detection purpose.

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