Diameter detection device and detection method for quartz glass tube expansion based on accurate positioning

Abstract

The application discloses a diameter detection device and method for quartz glass pipe expansion based on accurate positioning, and relates to the technical field of pipe diameter detection.The application comprises a conveying belt, an expansion pipe push-pull mechanism, an expansion pipe fixing mechanism, an expansion pipe inner diameter detection mechanism and a detection push-pull mechanism; the expansion pipe push-pull mechanism is installed on one side of the output end of the conveying belt, and the expansion pipe fixing mechanism is installed on the other side; the tail end of the expansion pipe inner diameter detection mechanism is installed on the front end of the detection push-pull mechanism, and the expansion pipe inner diameter detection mechanism and the detection push-pull mechanism are on the same straight line; the expansion pipe inner diameter detection mechanism comprises a heat preservation outer sleeve, a gas exchange pipeline combination, an adjusting mounting column and a plurality of inner diameter detection components.The application adjusts the extension of the detection thimble against the quartz glass expansion pipe through air pressure, and the extension length is different, and the internal air pressure is different, so that the extension length is judged through the air pressure, the inner diameter is judged, and the detection is carried out, thereby solving the problems of the existing pipe inner diameter detection, such as trouble, complicated operation and low detection precision.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipeline diameter detection, and particularly relates to a diameter detection device and method for quartz glass pipe expansion based on accurate positioning. BACKGROUND

[0002] Quartz glass pipe expansion is a process of widening one end of a quartz glass pipe after treatment, and the principle is that the high-temperature expansion coefficient of quartz glass is much smaller than that of ordinary glass, so that the quartz glass pipe can be deformed by heating to achieve pipe expansion. However, after pipe expansion, whether the diameter meets the standard needs to be detected, and diameter detection is mainly inner diameter detection. When the inner diameter is determined, the wall thickness will be determined. However, pipe inner diameter detection is relatively troublesome. Using laser detection will result in low detection precision and large error due to pipe light transmission refraction and other reasons. Using a caliper for detection is troublesome and the reading is not accurate. SUMMARY

[0003] The application aims to provide a diameter detection device and method for quartz glass pipe expansion based on accurate positioning, which can detect the inner diameter by adjusting the detection thimble to extend against the quartz glass pipe expansion, judging the extension length according to the air pressure, and judging the inner diameter size according to the air pressure, thereby solving the problems of existing pipe inner diameter detection, such as being troublesome, complicated, and low in detection precision.

[0004] To solve the above technical problems, the application is achieved by the following technical scheme: a diameter detection device for quartz glass pipe expansion based on accurate positioning, comprising a conveying belt, an expansion push-pull mechanism, an expansion fixing mechanism, an expansion inner diameter detection mechanism, and a detection push-pull mechanism.

[0005] The expansion push-pull mechanism is installed on one side of the output end of the conveying belt, and the expansion fixing mechanism is installed on the other side.

[0006] The tail end of the expansion inner diameter detection mechanism is installed on the front end of the detection push-pull mechanism, and the expansion inner diameter detection mechanism and the detection push-pull mechanism are on the same straight line.

[0007] The expansion pipe inner diameter detection mechanism comprises a heat preservation sleeve pipe, a ventilation pipeline combination, an adjusting mounting column and a plurality of inner diameter detection components, the plurality of inner diameter detection components are sequentially fixedly connected to form a straight line arrangement, the adjusting mounting column is a convex cylinder, the tail end of the last inner diameter detection component is fixed at the front end of the convex cylinder, the heat preservation sleeve pipe is sleeved outside the convex cylinder, an air inlet pipe and two air outlet pipes are inserted into the adjusting mounting column, the air inlet pipe is inserted into the tail end position in the heat preservation sleeve pipe, the two air outlet pipes are arranged along the inner wall of the heat preservation sleeve pipe to the front end position, and a plug is arranged at the front end of the heat preservation sleeve pipe.

[0008] The inner diameter detection component comprises a gas pressure cylinder, a precision piston, a hydraulic cylinder, an adjusting bolt column, a detection thimble and a precision pressure gauge, a stage mounting column frame is arranged at the left side end of the gas pressure cylinder, the adjusting bolt column is embedded with the hydraulic cylinder, the telescopic shaft end of the hydraulic cylinder is fixed with the precision piston, the gas pressure cylinder is sequentially provided with a piston cavity and a gas pressure cavity from the left side end to the right side, the precision piston is movably inserted into the piston cavity, a plurality of thimble holes are evenly arranged on the one side wall of the gas pressure cavity, a pressure gauge insertion hole is arranged at the right side end of the gas pressure cylinder and communicates with the gas pressure cavity, one detection thimble is inserted into each thimble hole, and the precision pressure gauge is sealingly inserted into the pressure gauge insertion hole and the probe part is arranged in the gas pressure cavity.

[0009] The lower half of the detection thimble is a precision cylinder, and the upper half is a thin cylinder, and the heat preservation sleeve pipe is provided with a thin hole matched with the thin cylinder.

[0010] Before detection, 1 / 3 of the precision piston is inserted into the piston cavity, and 2 / 3 of the piston cavity is not inserted into the precision piston, the volume of the 2 / 3 section of the piston cavity is twice the volume of the gas pressure cavity, and the detection thimble is limited by the heat preservation sleeve pipe and cannot completely come out of the thimble hole.

[0011] The connecting assembly is connected between the detection push-pull mechanism and the adjusting mounting column, the connecting assembly comprises a connecting sleeve, a rotating servo motor and two bearings, four connecting columns are arranged on the outer wall of the rear side end of the connecting sleeve, two bearings are sleeved on the rear half of the cylinder of the adjusting mounting column and inserted into the connecting sleeve, the rotating servo motor is embedded in the front end of the detection push-pull mechanism, the rotating shaft of the rotating servo motor is inserted into the axis position of the rear side end of the adjusting mounting column, and the connecting columns are fixed on the outer wall of the front end of the detection push-pull mechanism.

[0012] The application is further provided with the pipe expanding push-pull mechanism, which comprises a push-pull structure and a fixed plug part, the push-pull structure comprises a square sleeve, a square telescopic rod, a telescopic servo motor and a telescopic screw rod, the telescopic servo motor is embedded in the bottom of the square sleeve, the telescopic screw rod is connected to the rotating shaft of the telescopic servo motor, the telescopic screw rod is inserted into the square telescopic rod from the center of the rear end of the square telescopic rod, the rear end of the square telescopic rod is movably inserted into the square sleeve, and the fixed plug part comprises a circular plug column and four extrusion cylinders, the extrusion cylinders are evenly embedded in the wall of the circular plug column, the extrusion sponges are mounted on the shaft ends of the extrusion cylinders, and one end of the circular plug column is fixed on the front end of the square telescopic rod.

[0013] The application is further provided with the pipe expanding fixing mechanism, which comprises a sleeve and a plurality of extrusion positioning parts, the sleeve is provided with three circles of equidistantly arranged mounting holes, the extrusion positioning part comprises an extrusion sleeve, a cylindrical telescopic rod and a roller, two slide rails are arranged on the side walls of the cylindrical telescopic rod, two slide grooves matched with the slide rails are arranged on the inner wall of the extrusion sleeve, an extrusion motor is arranged on the bottom of the extrusion sleeve, an extrusion screw rod is connected to the rotating shaft of the extrusion motor, the extrusion screw rod is spirally penetrated into the cylindrical telescopic rod from the tail end of the cylindrical telescopic rod, and the roller is mounted on the front end of the cylindrical telescopic rod.

[0014] The application is further provided with the pipe expanding push-pull mechanism, which comprises a push-pull structure and a fixed plug part, the push-pull structure comprises a square sleeve, a square telescopic rod, a telescopic servo motor and a telescopic screw rod, the telescopic servo motor is embedded in the bottom of the square sleeve, the telescopic screw rod is connected to the rotating shaft of the telescopic servo motor, the telescopic screw rod is inserted into the square telescopic rod from the center of the rear end of the square telescopic rod, the rear end of the square telescopic rod is movably inserted into the square sleeve, and the fixed plug part comprises a circular plug column and four extrusion cylinders, the extrusion cylinders are evenly embedded in the wall of the circular plug column, the extrusion sponges are mounted on the shaft ends of the extrusion cylinders, and one end of the circular plug column is fixed on the front end of the square telescopic rod.

[0015] The application is further provided with the pipe expanding push-pull mechanism, which comprises a push-pull structure and a fixed plug part, the push-pull structure comprises a square sleeve, a square telescopic rod, a telescopic servo motor and a telescopic screw rod, the telescopic servo motor is embedded in the bottom of the square sleeve, the telescopic screw rod is connected to the rotating shaft of the telescopic servo motor, the telescopic screw rod is inserted into the square telescopic rod from the center of the rear end of the square telescopic rod, the rear end of the square telescopic rod is movably inserted into the square sleeve, and the fixed plug part comprises a circular plug column and four extrusion cylinders, the extrusion cylinders are evenly embedded in the wall of the circular plug column, the extrusion sponges are mounted on the shaft ends of the extrusion cylinders, and one end of the circular plug column is fixed on the front end of the square telescopic rod.

[0016] S1: the quartz glass expanding pipes are placed on the conveying belt one by one, when the quartz glass expanding pipes reach the position of the pipe expanding push-pull mechanism and are detected, the conveying belt is immediately stopped, the pipe expanding push-pull mechanism fixes one end of the quartz glass expanding pipe and slowly pushes the other end into the pipe expanding fixing mechanism for fixing;

[0017] S2: before detection, constant temperature gas is introduced into the heat preservation sleeve to preserve heat, the pipe expanding inner diameter detection mechanism is inserted into the quartz glass expanding pipe from one end, so that a plurality of inner diameter detection assemblies are arranged in the quartz glass expanding pipe, the inner diameter detection assemblies are started to detect, each inner diameter detection assembly detects a group of data at different positions of the quartz glass expanding pipe, a plurality of groups of data are formed, the detection is stopped, the pipe expanding inner diameter detection mechanism is rotated to move an angle, and detection is performed again to form two groups of detection data;

[0018] S3: after detection, the data are uploaded to the computer for analysis, whether the diameter of the detected quartz glass expanding pipe meets the requirements is judged, and the quartz glass expanding pipe is marked;

[0019] S4: the expansion tube push-pull mechanism pulls the detected quartz glass expansion tube back to the conveying belt, and then outputs, and the next quartz glass expansion tube continues to be conveyed to the expansion tube push-pull mechanism position for detection preparation.

[0020] The present application is further provided that the inner diameter detection assembly adopts the above 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 cavity into the gas pressure cavity, the gas pressure cavity is pressurized to slowly eject the detection thimble outward; S2, during the slow outward ejection process of the detection thimble, when the top of all the thin cylinders touches the inner wall of the quartz glass expansion tube, at this time, when the gas pressure in the gas pressure cavity is stable, the precision pressure gauge will detect a stable gas pressure; S3, since the average ejection length of the detection thimble determines the gas pressure in the gas pressure cavity, the average ejection length of the detection thimble is judged by detecting the gas pressure by the precision pressure gauge, so as to determine the inner diameter of the quartz glass expansion tube, so as to achieve the detection purpose.

[0021] The present application has the following beneficial effects:

[0022] 1, the present application can accurately send the quartz glass expansion tube into the expansion tube fixing mechanism one by one for fixing, at this time, the expansion tube inner diameter detection mechanism is inserted into the quartz glass expansion tube for tube inner diameter detection, without laser detection and caliper detection, the detection precision is high, and the automatic detection can complete efficient and accurate diameter detection.

[0023] 2, the present application utilizes the different gas volume and different gas pressure under the cavity change to detect, when the same volume gas (inert gas, nitrogen) is filled into the gas pressure cavity, due to the different ejection distance of the detection thimble, the space change after the thimble hole (equivalent to the increase of the gas cavity) makes the gas pressure change, the ejection length (average value) of the detection thimble is determined by the gas pressure value, so as to determine the inner diameter, through the precise setting structure, higher precision can be achieved, and the precision can reach millimeter level.

[0024] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0026] Figure 1 The structure diagram of the diameter detection device for quartz glass expansion tube based on accurate positioning.

[0027] Figure 2This is a schematic diagram of the exploded structure of a diameter detection device for quartz glass tube expansion based on precise positioning.

[0028] Figure 3 This is a schematic diagram of the exploded structure of a pipe expansion inner diameter testing mechanism.

[0029] Figure 4 This is a schematic diagram of the exploded structure of the extrusion positioning component.

[0030] Figure 5 This is a schematic diagram of the pneumatic cylinder structure.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 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

[0033] 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.

[0034] Please see Figures 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;

[0035] 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.

[0036] The tail end of the expansion tube inner diameter detection mechanism 4 is mounted on the front end of the detection push-pull mechanism 6, the expansion tube inner diameter detection mechanism 4 is in the same straight line with the detection push-pull mechanism 6, and the detection push-pull mechanism 6 can push and pull the expansion tube inner diameter detection mechanism 4 into and out of the inside of the quartz glass expansion tube;

[0037] The expansion tube inner diameter detection mechanism 4 comprises a heat preservation outer sleeve tube 41, a gas exchange pipeline combination, an adjusting mounting column 51 and a plurality of inner diameter detection components 7, the plurality of inner diameter detection components 7 are sequentially fixedly connected to form a straight line arrangement, the adjusting mounting column 51 is a convex cylinder, the tail end of the last inner diameter detection component 7 is fixed on the front end of the convex cylinder, the heat preservation outer sleeve tube 41 is sleeved on the outside of the convex cylinder, an air inlet pipe 412 and two air outlet pipes 411 are inserted into the adjusting mounting column 51, the air inlet pipe 412 is inserted into the tail end position in the heat preservation outer sleeve tube 41, the two air outlet pipes 411 are arranged along the inner wall of the heat preservation outer sleeve tube 41 to the front end position, and the front end of the heat preservation outer sleeve tube 41 is provided with a plug 42.

[0038] The expansion tube push-pull mechanism 2 can insert the end into the end of the quartz glass expansion tube, fix the end of the quartz glass expansion tube through the outer support of the end of the expansion tube push-pull mechanism 2, then push the end of the quartz glass expansion tube into the expansion tube fixing mechanism 3, the expansion tube 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 expansion tube inner diameter detection mechanism 4, at this time, the expansion tube inner diameter detection mechanism 4 is started to detect, before detection, constant temperature gas (25℃) is introduced to make the temperature in the heat preservation outer sleeve tube 41 constant, so as to reduce the influence of temperature on detection. The air inlet pipe 412 introduces air, the air flows to the tail end position in the heat preservation outer sleeve tube 41, and then flows from the two air outlet pipes 411 at the front end position to the rear end position and is discharged, so that the whole inner diameter detection component 7 is at a constant temperature (temperature error is less than 1℃).

[0039] The inner diameter detection component 7 comprises a gas pressure cylinder 71, a precise piston 74, a hydraulic cylinder 751, an adjusting bolt column 75, a detection thimble 73 and a precise pressure gauge 72, the left end of the gas pressure cylinder 71 is provided with a stage mounting column grid, the adjusting bolt column 75 is embedded with the hydraulic cylinder 751, the telescopic shaft end of the hydraulic cylinder 751 is fixed with the precise piston 74, the gas pressure cylinder 71 is sequentially provided with a piston cavity 711 and a gas pressure cavity 712 from the left end to the right side, the precise piston 74 is movably inserted into the piston cavity 711, a plurality of thimble holes 713 are evenly arranged on the one side wall of the gas pressure cavity 712 of the gas pressure cylinder 71, the right end of the gas pressure cylinder 71 is provided with a pressure gauge insertion hole 714 in communication with the gas pressure cavity 712, one detection thimble 73 is inserted into each thimble hole 713, and the precise pressure gauge 72 is sealingly inserted into the pressure gauge insertion hole 714 and the probe part is located in the gas pressure cavity 712;

[0040] The detection plunger 73 has a precise cylinder lower part and a thin cylinder upper part, and the heat preservation sleeve tube 41 is provided with a thin hole matched with the thin cylinder.

[0041] The inner diameter detection assembly 7 specifically detects as follows: S1, the precise piston 74 slowly and completely pushes the gas in the piston cavity 711 into the gas pressure cavity 712, and the gas pressure cavity 712 is pressurized to slowly push the detection plunger 73 outwards; S2, during the process of slowly pushing the detection plunger 73 outwards, when the top of all the thin cylinders touches the inner wall of the quartz glass expansion tube, at this time, when the gas pressure in the gas pressure cavity 712 is stable, the precise pressure gauge 72 will detect a stable gas pressure; S3, since the average pushing length of the detection plunger 73 determines the gas pressure in the gas pressure cavity 712, the average pushing length of the detection plunger 73 is judged by detecting the gas pressure through the precise pressure gauge 72, so as to determine the size of the inner diameter of the quartz glass expansion tube, so as to achieve the detection purpose.

[0042] Before detection, the precise piston 74 has 1 / 3 segment inserted into the piston cavity 711, and 2 / 3 segment of the piston cavity 711 is not inserted into the precise piston 74, the volume of the 2 / 3 segment of the piston cavity 711 is 2 times the volume of the gas pressure cavity 712, and the detection plunger 73 is limited by the heat preservation sleeve tube 41 and cannot be completely pushed out of the plunger hole 713.

[0043] The whole process is slowly pushed to prevent the detection plunger 73 from being pushed out too fast and damaging the quartz glass expansion tube, and after the gas is completely pushed out, the gas pressure cavity 712 is equivalent to being increased by 3 times (before being pushed out, the inside is in an atmospheric pressure state), but since the detection plunger 73 is pushed outwards by a distance, the plunger hole 713 will increase the gas cavity to increase the gas capacity, so the gas pressure value is 1.5-2.0 times the standard atmospheric pressure, and since the temperature is constant, the gas pressure is the sum of the sizes of the gas pressure cavity 712 and all the plunger holes 713 (communicating with the inside of the gas pressure cavity 712 and containing the gas part). Since the size of the gas pressure cavity 712 is constant, the total distance of the movement of all the detection plungers 73 outwards is determined by the gas pressure value, so as to determine the inner diameter. The precision of the precise pressure gauge 72 can reach an error of 2-5%, and the total distance error of the detection plunger 73 is about 1mm, which will cause a gas pressure change of more than 5%, the gas pressure cavity 712 is relatively small, and the lower part of the detection plunger 73 is relatively thick, so the displacement will obviously affect the gas pressure change.

[0044] The detection push-pull mechanism 6 is connected with the adjusting mounting column 51 by a connecting assembly 5, the connecting assembly 5 comprises a connecting sleeve 52, a rotating servo motor 60 and two bearings, four connecting columns are arranged on the outer wall of the rear end of the connecting sleeve 52, two bearings are sleeved on the rear half of the cylindrical column of the adjusting mounting column 51 and are inserted into the connecting sleeve 52, the rotating servo motor 60 is embedded in the front end of the detection push-pull mechanism 6, the rotating shaft of the rotating servo motor 60 is inserted into the rear end axis position of the adjusting mounting column 51, and the connecting columns are fixed on the outer wall of the front end of the detection push-pull mechanism 6.

[0045] The rotating servo motor 60 can make the adjusting mounting column 51 rotate by a certain angle, so that the whole pipe expanding inner diameter detection mechanism 4 rotates by a certain angle (less than 90°), and re-detection is carried out, so as to improve the detection precision.

[0046] The pipe expanding push-pull mechanism 2 comprises a push-pull structure and a fixed plug part, the push-pull structure is the same as that of the detection push-pull mechanism 6, the push-pull structure comprises a square sleeve 21, a square telescopic rod 23, a telescopic servo motor 22 and a telescopic screw rod, the telescopic servo motor 22 is embedded in the inner bottom of the square sleeve 21, the rotating shaft of the telescopic servo motor 22 is connected with the telescopic screw rod, the telescopic screw rod is spirally inserted into the rear end center position of the square telescopic rod 23, the rear end of the square telescopic rod 23 is movably inserted into the square sleeve 21, and the fixed plug part comprises a circular insertion column 24 and four extrusion cylinders 25.

[0047] The push and pull are both realized by rotating the telescopic screw rod driven by the telescopic servo motor 22 to push the square telescopic rod 23 to move back and forth. When the four extrusion cylinders 25 are synchronously extruded outward, the extrusion sponge block is extruded against the inner wall of the quartz glass expanding pipe to fix the end of the quartz glass expanding pipe. When the quartz glass expanding pipe is gradually inserted into the pipe expanding fixing mechanism 3, the extrusion sponge block is always in the extrusion state.

[0048] The pipe expanding fixing mechanism 3 comprises a fixed sleeve 31 and a plurality of extrusion positioning parts 30, the fixed sleeve 31 is provided with three circles of equidistantly arranged mounting holes, the extrusion positioning part 30 comprises an extrusion sleeve 32, a cylindrical telescopic rod 34 and a roller 35, two slide rails 341 are arranged on the side walls of the cylindrical telescopic rod 34, two slide grooves matched with the slide rails 341 are arranged on the inner wall of the extrusion sleeve 32, an extrusion motor is arranged on the inner bottom of the extrusion sleeve 32, an extrusion screw rod 33 is connected with the rotating shaft of the extrusion motor, the extrusion screw rod 33 is spirally penetrated into the inside of the cylindrical telescopic rod 34 from the tail end of the cylindrical telescopic rod 34, the roller 35 is arranged on the front end of the cylindrical telescopic rod 34, and the rolling direction of the roller 35 is parallel to the axis of the fixed sleeve 31.

[0049] In the first circle extrusion positioning member 30 start extrusion, in the roller 35 contact and extrusion, that is, fixed effect, but also along the roller 35 displacement, then, into the second and third circle, using the same operation, complete the fixed, because after the push, the conveyor belt no longer play a supporting role, need to be fixed, can't wait for all the push fixed.

[0050] The belt surface of the conveyor belt 1 is provided with an expansion tube placing groove 11 at equal intervals. It is convenient for conveying without rolling and can effectively position.

[0051] The diameter detection method for quartz glass expansion tube based on accurate positioning adopts a diameter detection device for quartz glass expansion tube based on accurate positioning, and the specific detection steps are as follows:

[0052] S1: Put the quartz glass expansion tube on the conveyor belt 1 one by one, when the quartz glass expansion tube reaches the expansion tube push-pull mechanism 2 position is detected, immediately stop the conveyor belt 1 operation, the expansion tube push-pull mechanism 2 will one end of the quartz glass expansion tube fixed, the other end slowly pushed into the expansion tube fixing mechanism 3 for fixing;

[0053] S2: Before detection, the constant temperature gas is introduced into the heat preservation outer sleeve tube 41 to keep warm, the expansion tube inner diameter detection mechanism 4 is inserted into the inside from one end of the quartz glass expansion tube, so that the plurality of inner diameter detection assemblies 7 are all in the quartz glass expansion tube, the inner diameter detection assembly 7 is started to detect, each inner diameter detection assembly 7 detects a group of data at different positions of the quartz glass expansion tube, forms a plurality of groups of data, stops detection, rotates the expansion tube inner diameter detection mechanism 4 to move the angle, and then detects again to form two groups of detection data;

[0054] S3: After detection, the data is uploaded to the computer for analysis to determine whether the diameter of the just detected quartz glass expansion tube meets the requirements and is marked;

[0055] S4: The expansion tube push-pull mechanism 2 pulls the quartz glass expansion tube back to the conveyor belt 1 after detection, and then outputs, and then the next quartz glass expansion tube continues to be conveyed to the expansion tube push-pull mechanism 2 position for detection preparation.

[0056] In the case of abnormal quartz glass expansion tube, the system is marked, or above the conveyor belt (an easy-to-clean spraying device is arranged above the output end to mark).

[0057] In the description of the specification, reference to "one embodiment", "an example", "a specific example" or the like means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "an example", "a specific example" or the like in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0058] The preferred embodiments of the application disclosed above are only to help explain the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments described. Obviously, many modifications and variations can be made in light of the contents of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical application of the application, so that those skilled in the art can well understand and utilize the application. The application 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 sleeved on 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. 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. 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.

2. The diameter detection device for quartz glass tube expansion based on precise positioning according to claim 1, 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.

3. The diameter detection device for quartz glass tube expansion based on precise positioning according to claim 1, 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.

4. The diameter detection device for quartz glass tube expansion based on precise positioning according to claim 1 or 3, 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.

5. 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.

6. 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.

7. 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 1-6, is used for detection. The specific detection steps are as follows: S1: Place the quartz glass expanders one by one onto the conveyor belt. When the quartz glass expander reaches the position of the expander push-pull mechanism and is detected, immediately stop the conveyor belt. The expander push-pull mechanism fixes one end of the quartz glass expander and slowly pushes the other end of the quartz glass expander into the expander 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.

8. The diameter detection method for quartz glass tube expanders based on precise positioning according to claim 7, characterized in that, The specific detection operation of the inner diameter detection component 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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