A high temperature furnace mouth diameter measuring device used in optical fiber production

Abstract

The present invention provides a high-temperature furnace mouth diameter measuring device applied to optical fiber production, which can solve the problem that the existing diameter measuring device is not suitable for diameter measuring of calibrated products. The device comprises a bracket arranged outside the high-temperature furnace mouth and a diameter measuring instrument on the bracket; the bracket comprises an annular fixing frame and a rotating bottom plate, the annular fixing frame is fixedly arranged on the top outer peripheral side of the high-temperature furnace mouth, the rotating bottom plate is rotatably arranged in the inner ring of the annular fixing frame through a rotating driving mechanism, a central through hole is opened in the center of the rotating bottom plate, the central through hole is directly opposite to the high-temperature furnace mouth, an adjusting mechanism is arranged on the rotating bottom plate and on the outer peripheral side of the central through hole, the adjusting mechanism comprises a linear translation component and a vertical lifting component, the linear translation component is arranged along the radial direction of the rotating bottom plate, the diameter measuring instrument is installed on the vertical lifting component, the vertical lifting component is installed on the linear translation component, and the rotating driving mechanism, the linear translation component, the vertical lifting component and the diameter measuring instrument are all electrically connected to the diameter measuring control system PLC.

Description

Technical Field

[0001] The invention relates to the field of optical fiber production, and in particular to a high-temperature furnace mouth diameter measuring device used in optical fiber production. Background Art

[0002] High-temperature furnaces are essential production equipment in optical fiber production and are widely used in the preparation of optical fiber preforms and optical fiber drawing processes. At different stages of optical fiber production, the outer diameter of the product needs to be measured in order to monitor the changes in the outer diameter of the product to determine and control the quality of the overall product. In the current preparation of optical fiber preform rods and optical fiber drawing processes, a diameter gauge is installed at the furnace mouth of the high-temperature furnace to detect the outer diameter of the products coming out of the furnace; most of the existing diameter gauges are fixed on a bracket arranged on the side of the furnace mouth of the high-temperature furnace, and they can often only effectively measure products with fixed outer diameters. When measuring products with variable diameters, it is necessary to manually adjust the position of the diameter gauge on the bracket, and in the process of adjusting the position of the diameter gauge, due to production safety factors and measurement accuracy requirements, continuous production often needs to be interrupted, resulting in low production efficiency; although there are also diameter measuring devices in the field that can adjustably install the diameter gauge on the bracket through a transmission structure of gears and racks, since the diameter measuring device is applied to the outside of the furnace mouth of the high-temperature furnace, the transmission structure of the gears and racks is affected by the long-term high temperature of the furnace mouth and there is a risk of deformation, which leads to a short service life of the entire device and cannot guarantee accurate measurement. Summary of the invention

[0003] In view of the above problems, the present invention provides a high-temperature furnace mouth diameter measuring device applied to optical fiber production, which can solve the problem that the existing high-temperature furnace mouth diameter measuring device is not suitable for diameter measurement of calibrated products.

[0004] The technical solution is a high-temperature furnace mouth diameter measuring device used in optical fiber production, which includes a bracket arranged on the outside of the high-temperature furnace mouth and a diameter gauge arranged on the bracket, characterized in that: the bracket includes an annular fixing frame and a rotating base plate, the annular fixing frame is fixedly arranged on the top outer peripheral side of the high-temperature furnace mouth, the rotating base plate is rotatably arranged in the inner ring of the annular fixing frame through a rotating drive mechanism, a central through hole is opened in the center of the rotating base plate, and the central through hole is directly opposite to the high-temperature furnace mouth, an adjusting mechanism is arranged on the rotating base plate and on the outer peripheral side of the central through hole, the adjusting mechanism includes a linear translation component and a vertical lifting component, the linear translation component is arranged along the radial direction of the rotating base plate, the diameter gauge is installed on the vertical lifting component, and the vertical lifting component is installed on the linear translation component, and the rotating drive mechanism, the linear translation component, the vertical lifting component and the diameter gauge are all electrically connected to the diameter measurement control system PLC.

[0005] Furthermore, the adjustment mechanism is provided with four groups, and the four groups of adjustment mechanisms are evenly distributed along the outer circumference of the central through hole of the rotating base plate and are arranged opposite to each other in pairs, and each group of the adjustment mechanism is equipped with a diameter gauge.

[0006] Furthermore, the linear translation assembly includes a linear guide, a translation slide, and a translation drive motor. The linear guide is installed on the outside of the central through hole of the rotating base plate and extends radially along the rotating base plate. The bottom of the translation slide is slidably connected to the linear guide through a sliding block. The power output end of the translation drive motor is transmission-connected to the translation slide, and the translation drive motor is electronically connected to the diameter measurement control system PLC.

[0007] Furthermore, the vertical lifting assembly includes a lifting guide rail, a lifting slide and a lifting drive motor. The translation slide is vertically connected to a vertical plate. The lifting guide rail is arranged on a side surface of the vertical plate facing the central through hole. The back side of the lifting slide is slidably connected to the lifting guide rail through a lifting slide. The power output end of the lifting drive motor is transmission-connected to the lifting slide. The diameter gauge is arranged on the lifting slide. The lifting drive motor is electronically connected to the diameter measuring control system PLC.

[0008] Furthermore, the rotary drive mechanism includes a rotary shaft and a rotary drive motor. The rotary shaft is a hollow shaft, which is embedded in the central through hole of the rotary base plate and has a protruding portion with an axial bottom protruding from the bottom surface of the rotary base plate. The inner hole of the hollow shaft faces the furnace mouth of the high-temperature furnace. A gear ring is installed on the outer periphery of the protruding portion of the rotary shaft. A driving gear is installed on the power output end of the rotary drive motor. The driving gear and the gear ring are connected by a transmission chain. The rotary drive motor is electronically connected to the diameter measurement control system PLC.

[0009] Furthermore, there is no temperature sensor on the lifting slide plate and below the diameter gauge, and the temperature sensor is connected to the electrical control signal of the diameter measurement control system.

[0010] Furthermore, safety gratings are respectively arranged on the left and right sides of the lifting slide, and the safety gratings are connected to the electrical control signals of the diameter measurement control system.

[0011] Furthermore, the caliper adopts a visual caliper device.

[0012] Furthermore, the annular fixing frame is installed on the outer side of the high-temperature furnace opening through the supporting feet at the bottom.

[0013] The beneficial effects of the present invention are as follows: its bracket comprises an annular fixing frame and a rotating base plate, and the rotating base plate is rotatably installed in the inner ring of the annular fixing frame through a rotating drive mechanism, and a central through hole is opened on the rotating base plate, and an adjusting mechanism for installing a diameter gauge is arranged on the outer peripheral side of the central through hole, so that the diameter gauge can make circumferential rotation along with the rotating base plate on the one hand, and can make linear translation and vertical lifting movement along the radial direction of the rotating base plate driven by the linear translation component and the vertical lifting component of the adjusting mechanism on the other hand, so that the diameter gauge can be adjusted according to the actual measurement position requirements of the product extending from the furnace mouth of the high-temperature furnace and passing through the central through hole, especially the different position test requirements of the variable diameter product, so as to improve the detection accuracy; in addition, its rotating drive mechanism, the adjusting mechanism, and the diameter gauge are all electrically connected to the diameter measurement control system through the PLC, so that the adjustment and detection of the position of the diameter gauge do not require manual operation, and the phenomenon of interruption of continuous production due to adjustment can be avoided, so that the production efficiency can be greatly improved, the labor cost of production can be reduced, and the safety hazards caused by manual operation can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a first viewing direction of a device for measuring the diameter of a furnace opening of a high-temperature furnace used in optical fiber production according to the present invention;

[0015] Figure 2 It is a structural schematic diagram of a second viewing direction of a high-temperature furnace mouth diameter measuring device used in optical fiber production according to the present invention.

[0016] Figure markings: 10-bracket, 11-annular fixing frame, 12-rotating base plate, 13-central through hole, 14-supporting foot, 20-diameter gauge, 30-rotation drive mechanism, 31-rotation axis, 32-rotation drive motor, 33-gear ring, 34-drive gear, 35-transmission chain, 40-adjusting mechanism, 41-linear translation assembly, 411-linear guide rail, 412-translational slide plate, 413-translational drive motor, 414-sliding block, 42-vertical lifting assembly, 421-lifting guide rail, 422-lifting slide plate, 423-lifting drive motor, 424-vertical plate, 425-lifting slider, 50-temperature sensor, 60-safety grating. DETAILED DESCRIPTION

[0017] See Figure 1 and Figure 2The present invention discloses a device for measuring the diameter of a furnace mouth of a high-temperature furnace used in the production of optical fibers, which comprises a bracket 10 arranged outside the furnace mouth of the high-temperature furnace and a diameter gauge 20 arranged on the bracket. The bracket 10 comprises an annular fixing frame 11 and a rotating bottom plate 12. The annular fixing frame 11 is fixedly arranged on the top outer peripheral side of the furnace mouth of the high-temperature furnace. The rotating bottom plate 12 is rotatably arranged in the inner ring of the annular fixing frame 11 through a rotating driving mechanism 30. A central through hole 13 is opened at the center of the rotating bottom plate 12. The central through hole 13 faces the furnace mouth of the high-temperature furnace. An adjusting mechanism 40 is arranged on the rotating bottom plate 12 and on the outer peripheral side of the central through hole 13. The adjusting mechanism 40 comprises a linear translation component 41 and a vertical lifting component 42. The linear translation component 41 moves along the vertical axis of the rotating bottom plate 12. The rotating base plate is radially arranged, and the diameter gauge 20 is installed on the vertical lifting assembly 42, the vertical lifting assembly 42 is installed on the linear translation assembly 41, and the rotary drive mechanism 30, the linear translation assembly 41, the vertical lifting assembly 42 and the diameter gauge 20 are all electrically connected to the diameter measurement control system PLC; through the above scheme, the diameter measurement control system controls the rotation drive mechanism 30, the linear translation assembly 41, and the vertical lifting assembly 42 through the PLC according to the actual product detection position requirements to adjust the position of the diameter gauge 20, and after the product processed in the high-temperature furnace is extended through the furnace mouth and can pass through the central through hole 13 of the rotating base plate 12, the diameter gauge 20 adjusted in place detects the outer diameter of the product.

[0018] As a preferred implementation scheme, in this embodiment, four groups of adjusting mechanisms 40 are provided, and the four groups of adjusting mechanisms 40 are evenly distributed along the outer circumference of the central through hole 13 of the rotating base plate 12 and are arranged opposite to each other in pairs, and a diameter gauge 20 is installed on each group of adjusting mechanisms 40; in actual application, the diameter measurement control system can control the four groups of adjusting mechanisms 40 to operate separately through PLC, so that the four diameter gauges 20 are respectively located at different heights, thereby realizing the simultaneous diameter measurement of four different cross-sectional positions of the product, making the diameter measurement method more diverse, thereby further improving production efficiency and reducing production costs.

[0019] A further specific technical solution is that the linear translation assembly 41 includes a linear guide rail 411, a translation slide 412, and a translation drive motor 413. The linear guide rail 411 is installed on the outside of the central through hole 13 of the rotating base plate 12 and extends radially along the rotating base plate 12. The bottom of the translation slide 412 is slidably connected to the linear guide rail 411 through a sliding block 414. The power output end of the translation drive motor 413 is transmission-connected to the translation slide 412, and the translation drive motor 413 is electronically connected to the diameter measurement control system PLC; thus, the translation drive motor can drive the translation slide 412 to move linearly along the linear guide rail 411 along the radial direction of the rotating base plate 12.

[0020] A further specific technical solution is that the vertical lifting component 42 includes a lifting guide rail 421, a lifting slide 422 and a lifting drive motor 423. The translation slide 422 is vertically connected to a vertical plate 424. The vertical plate 424 is provided with a lifting guide rail 421 on one side facing the central through hole 13. The back of the lifting slide 422 is slidably connected to the lifting guide rail 421 through a lifting slider 425. The power output end of the lifting drive motor 423 is transmission-connected to the lifting slide 422. A diameter gauge 20 is provided on the lifting slide 422. The lifting drive motor 423 is electronically connected to the diameter measuring control system PLC; thus, the lifting drive motor 423 can drive the translation slide 422 to carry the diameter gauge 20 together to perform vertical lifting and lowering movements along the lifting guide rail 421 as a whole.

[0021] In a further specific solution, the rotary drive mechanism 30 includes a rotary shaft 31 and a rotary drive motor 32. The rotary shaft 31 is a hollow shaft. The rotary shaft 31 is embedded in the central through hole 13 of the rotary bottom plate 12 and has a protruding portion whose axial bottom protrudes from the bottom surface of the rotary bottom plate 12. The inner hole of the hollow shaft faces the high-temperature furnace port. A gear ring 33 is installed on the outer periphery of the protruding portion of the rotary shaft 31. A driving gear 34 is installed on the power output end of the rotary drive motor 32. The driving gear 34 and the gear ring 33 are transmitted through a transmission chain 35. The rotary drive motor 32 is dynamically connected to the diameter measuring control system PLC electronically connected; thus, the diameter measuring control system can control the rotation of the rotary drive motor 32 through the PLC, and drive the gear ring 33 and the rotating shaft 31 to rotate through the driving gear 34 and the transmission chain 35, and then the rotating shaft 31 drives the entire rotating base plate 12 and the adjusting mechanism 40 on which the diameter gauge 20 is installed to rotate as a whole, so as to realize the detection of different positions of the product by the diameter gauge 20, thereby improving the detection accuracy.

[0022] As a further preferred technical solution of the device of the present invention, there is no temperature sensor 50 on the lifting slide 422 and below the diameter gauge 20, and the temperature sensor 50 is connected to the electrical control signal of the diameter measuring control system; each temperature sensor 50 can detect the temperature of the corresponding position of the diameter gauge 20 in real time. If the temperature measured by any temperature sensor 50 exceeds the preset temperature value in the diameter measuring control system, the diameter measuring control system controls the linear translation components 41 of all adjustment mechanisms 40 to move radially outward from the rotating base plate 12 through PLC, so that the diameter gauge 20 is located away from the central through hole 13, that is, the diameter gauge 20 is located away from the furnace mouth of the high-temperature furnace, thereby protecting the diameter gauge 20 from the high temperature invasion of the furnace mouth of the high-temperature furnace to extend its service life.

[0023] A further preferred technical solution of the present embodiment is that safety gratings 60 are respectively arranged on the left and right sides of the lifting slide 422, and the safety gratings 60 are connected with the electrical control signal of the diameter measuring control system; the safety gratings 60 respectively arranged on the left and right sides of each lifting slide 422 form a corresponding working area, and when an object or a person enters or touches the working area formed by the safety gratings 60 during the diameter measuring process, the diameter measuring control system will send a signal to trigger the emergency stop function of the entire diameter measuring device and cut off the power to the entire device until there is no object in the working area and the staff confirms that the diameter measuring task can be continued, and then the corresponding diameter measuring task can be continued; thereby, the application safety of the entire diameter measuring device can be improved.

[0024] In the device of the present invention, the diameter gauge 20 adopts a visual diameter measuring device already available in the art. In this embodiment, the diameter gauge 20 adopts the MV-CA050-20GC purchased from Hikvision Robotics. The use of a visual diameter measuring device can effectively improve the diameter measurement accuracy. At the same time, its visual function can also detect whether the product is in a stationary state, so as to further improve the detection accuracy.

[0025] In addition, the annular fixing frame 11 is installed on the outside of the high-temperature furnace mouth through the supporting feet 14 at the bottom; thereby, the entire bracket 10 maintains a certain safety distance from the high-temperature furnace mouth, avoiding the adverse effects of long-term high temperature on the various adjustment mechanisms 40, the diameter gauge 30, and the temperature sensor 50 arranged on the rotating bottom plate 12, thereby extending the service life of the entire diameter measuring device.

[0026] The above detailed description of the specific implementation of the present invention is only a preferred implementation of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A device for measuring the diameter of a high-temperature furnace mouth used in optical fiber production, comprising a bracket arranged outside the high-temperature furnace mouth and a diameter measuring instrument arranged on the bracket, characterized in that: The bracket includes an annular fixing frame and a rotating base plate, the annular fixing frame is fixedly arranged on the top outer peripheral side of the high-temperature furnace mouth, the rotating base plate is rotatably arranged in the inner ring of the annular fixing frame through a rotating drive mechanism, a central through hole is opened in the center of the rotating base plate, and the central through hole is directly opposite to the high-temperature furnace mouth, an adjusting mechanism is arranged on the rotating base plate and on the outer peripheral side of the central through hole, the adjusting mechanism includes a linear translation component and a vertical lifting component, the linear translation component is arranged along the radial direction of the rotating base plate, the diameter gauge is installed on the vertical lifting component, and the vertical lifting component is installed on the linear translation component, and the rotating drive mechanism, the linear translation component, the vertical lifting component and the diameter gauge are all electrically connected to the diameter measuring control system PLC; The adjusting mechanism is provided with four groups, and the four groups of adjusting mechanisms are evenly distributed along the outer circumference of the central through hole of the rotating base plate and are arranged opposite to each other in pairs, and a diameter gauge is installed on each group of the adjusting mechanisms; the diameter measurement control system controls the four groups of the adjusting mechanisms to operate separately through PLC, so that the four diameter gauges are respectively located at different heights to realize simultaneous diameter measurement of four different cross-sectional positions of the product.

2. The device for measuring the diameter of a high-temperature furnace mouth used in optical fiber production according to claim 1, characterized in that: The linear translation assembly includes a linear guide, a translation slide, and a translation drive motor. The linear guide is installed on the outside of the central through hole of the rotating base plate and extends radially along the rotating base plate. The bottom of the translation slide is slidably connected to the linear guide through a sliding block. The power output end of the translation drive motor is transmission-connected to the translation slide. The translation drive motor is electrically connected to the diameter measurement control system PLC.

3. The device for measuring the diameter of a high-temperature furnace mouth used in optical fiber production according to claim 2, characterized in that: The vertical lifting assembly includes a lifting guide rail, a lifting slide and a lifting drive motor. The translation slide is vertically connected to a vertical plate. The lifting guide rail is arranged on a side surface of the vertical plate facing the central through hole. The back side of the lifting slide is slidably connected to the lifting guide rail through a lifting slider. The power output end of the lifting drive motor is transmission-connected to the lifting slide. The lifting slide is provided with the diameter gauge. The lifting drive motor is electronically connected to the diameter measuring control system PLC.

4. The device for measuring the diameter of a high-temperature furnace mouth used in optical fiber production according to claim 1, characterized in that: The rotary drive mechanism includes a rotary shaft and a rotary drive motor. The rotary shaft is a hollow shaft, which is embedded in the central through hole of the rotary base plate and has a protruding portion with an axial bottom protruding from the bottom surface of the rotary base plate. The inner hole of the hollow shaft faces the furnace mouth of the high-temperature furnace. A gear ring is installed on the outer periphery of the protruding portion of the rotary shaft. A driving gear is installed on the power output end of the rotary drive motor. The driving gear and the gear ring are connected by a transmission chain. The rotary drive motor is electronically connected to the diameter measurement control system PLC.

5. The device for measuring the diameter of a high-temperature furnace mouth used in optical fiber production according to claim 3, characterized in that: There is no temperature sensor on the lifting slide plate and below the diameter gauge, and the temperature sensor is connected to the electrical control signal of the diameter measuring control system.

6. The device for measuring the diameter of a high-temperature furnace mouth used in optical fiber production according to claim 3, characterized in that: Safety gratings are respectively arranged on the left and right sides of the lifting slide plate, and the safety gratings are connected with the electrical control signal of the diameter measuring control system.

7. A device for measuring the diameter of a high-temperature furnace mouth used in optical fiber production according to any one of claims 1, 3, 5 or 6, characterized in that: The caliper adopts a visual caliper device.

8. The device for measuring the diameter of a high-temperature furnace mouth used in optical fiber production according to claim 1, characterized in that: The annular fixing frame is installed on the outer side of the high-temperature furnace opening through the supporting feet at the bottom.

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