Corrosion device and method for controlling diameter of glass rod

Abstract

The invention relates to the technical field of optical fiber manufacturing, and provides a corrosion device and method for controlling the diameter of a glass rod. The corrosion device comprises a corrosion container, a bracket, a weighing platform, pumping equipment, a liquid storage tank and a monitoring platform, the bracket is arranged on the weighing platform and is used for fixing a glass rod and accommodating the glass rod in the corrosion container; the liquid storage tank is communicated with the corrosion container through the pumping equipment, and the monitoring platform is electrically connected with the weighing platform and the pumping equipment; before a glass rod is corroded, a monitoring platform controls a pumping device to pump a hydrofluoric acid solution in a liquid storage tank into a corrosion container, and a weighing platform collects first weighing data when the hydrofluoric acid solution in the corrosion container reaches the corrosion height; after corrosion of the glass rod is completed, the weighing platform collects second weighing data, and the monitoring platform controls the pumping equipment to pump the solution in the corrosion container into the liquid storage tank. According to the invention, corrosion operation can be accurately carried out on the glass rod, and the corrosion efficiency of the glass rod is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber manufacturing, and in particular to an etching device and method for controlling the diameter of a glass rod. Background Art

[0002] In optical fiber production, when the diameter of the produced glass rod (the glass rod is a cylinder, the main component is silicon dioxide) is larger than the target diameter, it is necessary to use hydrofluoric acid solution to corrode the glass rod to reduce the diameter of the glass rod until it reaches the target diameter. Hydrofluoric acid (HF) reacts with silicon dioxide (SiO2) in the glass to generate gaseous silicon tetrafluoride (SiF4) and water (H2O). This reaction process utilizes the strong corrosiveness of hydrofluoric acid to complete the corrosion of the glass rod.

[0003] However, in actual applications, in order to strictly control the diameter of the glass rod, during the process of corroding the glass rod, the operator is required to manually take out the glass rod from the hydrofluoric acid solution and use a vernier caliper to measure the diameter of the glass rod. Since the concentration of the hydrofluoric acid solution gradually decreases during use, the efficiency of corroding the glass rod will decrease, and the time for corroding the glass rod needs to be increased. Since the concentration of hydrofluoric acid changes dynamically with use, the corrosion time of the glass rod cannot be determined, and thus there is uncertainty in the number and time of tests in the entire test process, requiring the operator to perform test operations repeatedly. In addition, in view of the safety hazard of the operator frequently contacting hydrofluoric acid during multiple measurements, protective clothing needs to be changed for each operation, which consumes a lot of time during the measurement process, which not only increases the workload but also affects the corrosion efficiency of the glass rod. Summary of the invention

[0004] The present invention provides an etching device and method for controlling the diameter of a glass rod, which are used to at least solve or improve the problem that the etching operation of the glass rod in the prior art is time-consuming and labor-intensive, and it is difficult to ensure the etching efficiency of the glass rod.

[0005] The present invention provides an etching device for controlling the diameter of a glass rod, comprising: an etching container, a bracket, a weighing platform, a pumping device, a liquid storage tank and a monitoring platform; The bracket is arranged on the weighing platform, and is used to fix the glass rod, and the glass rod is placed in the corrosion container; the liquid storage tank is connected to the corrosion container through the pumping device, and the monitoring platform is electrically connected to the weighing platform and the pumping device respectively; Before corroding the glass rod, the monitoring platform controls the pumping device to pump the hydrofluoric acid solution in the liquid storage tank into the corrosion container, and the weighing platform collects first weighing data when the hydrofluoric acid solution in the corrosion container reaches the corrosion height; After the glass rod is completely corroded, the weighing platform collects second weighing data, and the monitoring platform controls the pumping device to pump the solution in the corrosion container into the liquid storage tank; The second weighing data is determined by the first weighing data, the corrosion height, the density of the glass rod, and the diameter of the glass rod before and after corrosion.

[0006] According to an etching device for controlling the diameter of a glass rod provided by the present invention, the bracket comprises a first frame body, a second frame body and a polytetrafluoroethylene liner; The first frame is disposed on the weighing platform, and the second frame is connected to the first frame and extends into the corrosion container; The second frame is used to arrange the vertically distributed glass rods, and the polytetrafluoroethylene pads are arranged on the second frame and supported on the bottom surfaces of the glass rods.

[0007] According to the etching device for controlling the diameter of a glass rod provided by the present invention, the bracket further comprises a clamping assembly, and the clamping assembly is used to clamp the peripheral wall of the glass rod.

[0008] According to an etching device for controlling the diameter of a glass rod provided by the present invention, the clamping assembly includes two clamping units; The two clamping units are distributed on opposite sides of the glass rod, and each clamping unit includes an adjustment handle and a clamping head; the adjustment handle is rotatably disposed on the first frame and is threadedly connected to the clamping head; the clamping head is movably disposed on the second frame along a horizontal direction; The adjusting handle is used to control the clamping head to approach or move away from the glass rod by rotating, and the clamping heads of the two clamping units cooperate with each other to clamp the glass rod.

[0009] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, wherein the corrosion device further comprises a support frame; The weighing platform is arranged at the lower side of the support frame, and the corrosion container is arranged on the support frame; an accommodating space is formed in the first frame body, and the corrosion container and part of the support frame are arranged in the accommodating space.

[0010] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, wherein the corrosion device further comprises a waste liquid tank; The corrosion container is communicated with the waste liquid tank through the pumping device, and the liquid storage tank is communicated with the waste liquid tank through the pumping device.

[0011] According to a corrosion device for controlling the diameter of a glass rod provided by the present invention, the corrosion container is provided with a first overflow port, and the first overflow port is connected to the waste liquid tank through a first overflow pipeline; and / or the waste liquid tank is provided with a second overflow port, and the second overflow port is connected to the waste liquid tank through a second overflow pipeline.

[0012] According to the etching device for controlling the diameter of a glass rod provided by the present invention, the etching device is further provided with a filling area, and the pumping equipment is used to pump the hydrofluoric acid solution in the filling area into the liquid storage tank.

[0013] According to a glass rod diameter control etching device provided by the present invention, the monitoring platform includes a control module, a display module and an indication module; The weighing platform is electrically connected to the control module, and the control module is electrically connected to the pumping device, the display module and the indication module respectively; The display module is used to display the weighing data collected by the weighing platform, and the control module is used to control the indication module to issue indication information when the weighing data collected by the weighing platform reaches the second weighing data.

[0014] The present invention also provides a control method for the etching device for controlling the diameter of a glass rod as described above, comprising: controlling a pumping device to pump the hydrofluoric acid solution in a liquid storage tank into an etching container; When the hydrofluoric acid solution in the corrosion container reaches a corrosion height, the pumping device is controlled to stop working, the first weighing data collected by the weighing platform is acquired, and the glass rod is corroded based on the hydrofluoric acid solution in the corrosion container; When the weighing data collected by the weighing platform reaches the second weighing data, controlling the pumping device to pump the solution in the corrosion container into the liquid storage tank; The second weighing data is determined by the first weighing data, the corrosion height, the density of the glass rod, and the diameter of the glass rod before and after corrosion.

[0015] The present invention provides a corrosion device and method for controlling the diameter of a glass rod. By setting a corrosion container, a bracket, a weighing platform, a pumping device, a liquid storage tank and a monitoring platform, before the glass rod is corroded, the monitoring platform controls the pumping device to pump the hydrofluoric acid solution stored in the liquid storage tank into the corrosion container; after the corrosion of the glass rod is completed, the monitoring platform controls the pumping device to pump the solution in the corrosion container into the liquid storage tank; during the corrosion operation of the glass rod, based on the shape of the corroded part of the glass rod, the weighing data of the glass rod before and after the corrosion are obtained by the weighing platform, so as to accurately control the corrosion process of the glass rod. This design realizes automatic corrosion operation of the glass rod, and does not require operators to take out and measure the glass rod multiple times, so as to ensure that the glass rod accurately reaches the target diameter actually required, avoids operators from repeatedly contacting hazardous chemicals, and ensures the corrosion efficiency of the glass rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the etching device for controlling the diameter of the glass rod provided by the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the etching device for controlling the diameter of the glass rod provided by the present invention; Figure 3 It is a schematic structural diagram of the relative arrangement of the corrosion container, the weighing platform, the support frame and the bracket provided by the present invention; Figure 4 It is a schematic structural diagram of the relative arrangement of the weighing platform, the support frame and the bracket provided by the present invention; Figure 5 It is a flow chart of a control method of an etching device for controlling the diameter of a glass rod provided by the present invention; Reference numerals: 1. Corrosion container; 2. Weighing platform; 3. Support frame; 4. bracket; 41. first frame; 42. second frame; 43. polytetrafluoroethylene pad; 44. clamping assembly; 441. clamping unit; 4411. adjustment handle; 4412. clamping head; 5. Pumping equipment; 6. Liquid storage tank; 7. Monitoring platform; 8. Control cabinet; 9. Filling area; 10, first pipeline; 20, second pipeline; 30, third pipeline; 40, fourth pipeline; 50, fifth pipeline; 60, sixth pipeline; 70, first overflow pipeline; 80, second overflow pipeline; 101, first control valve; 102, second control valve; 103, third control valve; 104, fourth control valve; 105, fifth control valve; 106, sixth control valve; 1000. Glass rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Combine the following Figure 1-Figure 5 , the etching device and method for controlling the diameter of a glass rod provided by an embodiment of the invention are described in detail through specific embodiments and application scenarios.

[0020] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an etching device for controlling the diameter of a glass rod, comprising: an etching container 1, a bracket 4, a weighing platform 2, a pumping device 5, a liquid storage tank 6 and a monitoring platform 7; The bracket 4 is arranged on the weighing platform 2, and is used to fix the glass rod 1000, and to accommodate the glass rod 1000 in the corrosion container 1; the liquid storage tank 6 is connected to the corrosion container 1 through the pumping device 5, and the monitoring platform 7 is electrically connected to the weighing platform 2 and the pumping device 5 respectively; Before the glass rod 1000 is corroded, the monitoring platform 7 controls the pumping device 5 to pump the hydrofluoric acid solution in the liquid storage tank 6 into the corrosion container 1, and the weighing platform 2 collects the first weighing data when the hydrofluoric acid solution in the corrosion container 1 reaches the corrosion height; After the glass rod 1000 is completely corroded, the weighing platform 2 collects the second weighing data, and the monitoring platform 7 controls the pumping device 5 to pump the solution in the corrosion container 1 into the liquid storage tank 6; The second weighing data is determined by the first weighing data, the corrosion height, the density of the glass rod, and the diameter of the glass rod before and after corrosion.

[0021] It is understandable that the main material of the glass rod 1000 is silicon dioxide. The present invention can use hydrofluoric acid solution to corrode the glass rod 1000. The chemical reaction equation is as follows: SiO2+4HF=SiF4+2H2O; Since the silicon tetrafluoride (SiF4) generated by the above reaction is in a gaseous state, during the process of etching the glass rod 1000, the etched portion of the glass rod 1000 is cylindrical.

[0022] Assume that the weight of the glass rod 1000 before corrosion is m1, and the weight of the glass rod 1000 after corrosion is m2; the first weighing data is the sum of the weight of the glass rod 1000 before corrosion, which is m1, and the weight of the bracket 4; the second weighing data is the sum of the weight of the glass rod 1000 after corrosion, which is m2 and the weight of the bracket 4.

[0023] It can be seen from the above that the weight of the corroded portion of the glass rod 1000 is m1-m2. The weight of the corroded portion of the glass rod 1000 can be obtained by geometric calculation.

[0024] The density of the glass rod 1000 is set as ρ, the etching height of the glass rod 1000 is set as h, the diameter of the glass rod 1000 before etching is set as d1, and the diameter of the glass rod 1000 after etching is set as d2, which is also the target diameter that the glass rod 1000 should reach after etching. Since the etched part of the glass rod 1000 is cylindrical, we can get the following calculation formula: [π*(d1 / 2) 2 -π*(d2 / 2) 2 ]*h*ρ=m1-m2; In this way, by substituting the target diameter d2 of the glass rod 1000 into the above formula, it can be obtained that the weight of the glass rod 1000 after corrosion is m2; since the weight of the bracket 4 remains unchanged, and the weight of the bracket 4 can be obtained in advance, during the corrosion operation of the glass rod 1000, the target weight that the weighing platform 2 should weigh can be obtained according to the weight m2 of the glass rod 1000 after corrosion and the weight of the bracket 4. When the second weighing data collected by the weighing platform 2 reaches the target weight, it can be considered that the corrosion operation on the glass rod 1000 has been completed.

[0025] Since hydrofluoric acid is a highly corrosive acid, it is corrosive to the glass rod 1000, metals, etc., so the bracket 4, the corrosion container 1, the liquid storage tank 6 and the pipeline between the corrosion container 1 and the liquid storage tank 6 can be made of polytetrafluoroethylene, and the pumping equipment 5 uses a fluoroplastic chemical pump to ensure the normal operation of the pumping equipment 5.

[0026] At the same time, the monitoring platform 7 is provided with a touch screen and / or electric control buttons, the weighing platform 2 and the monitoring platform 7 are electrically connected, the monitoring platform 7 and the control modules such as the single chip microcomputer and PLC controller in the control cabinet 8 are electrically connected, and the control module in the control cabinet 8 and the pumping equipment 5 are electrically connected.

[0027] The etching device shown in the present invention is provided with an etching container 1, a bracket 4, a weighing platform 2, a pumping device 5, a liquid storage tank 6 and a monitoring platform 7. Before etching the glass rod 1000, the monitoring platform 7 controls the pumping device 5 to pump the hydrofluoric acid solution stored in the liquid storage tank 6 into the etching container 1; after the etching of the glass rod 1000 is completed, the monitoring platform 7 controls the pumping device 5 to pump the solution in the etching container 1 into the liquid storage tank 6; in the process of etching the glass rod 1000, based on the shape of the corroded part of the glass rod 1000, the weighing data of the glass rod 1000 before and after the etching are weighed by the weighing platform 2, so as to accurately control the etching process of the glass rod 1000. This design realizes automatic etching operation on the glass rod 1000, without the need for the operator to take out and measure the glass rod 1000 many times, so as to ensure that the glass rod 1000 accurately reaches the target diameter actually required, avoids the operator from repeatedly contacting hazardous chemicals, and also ensures the etching efficiency of the glass rod 1000.

[0028] In some embodiments, Figure 3 and Figure 4 As shown, the bracket 4 includes a first frame body 41, a second frame body 42 and a polytetrafluoroethylene liner 43; The first frame 41 is arranged on the weighing platform 2, and the second frame 42 is connected to the first frame 41 and extends into the corrosion container 1; the second frame 42 is used to set the vertically distributed glass rods 1000, and the polytetrafluoroethylene pad 43 is arranged on the second frame 42 and supported on the bottom surface of the glass rods 1000.

[0029] It is understandable that the first frame 41 and the second frame 42 are both vertically distributed, the bottom end of the first frame 41 is placed on the weighing platform 2, and the top end of the first frame 41 is connected to the top end of the second frame 42.

[0030] The second frame 42 is disposed inside the first frame 41 , and the bottom end of the second frame 42 extends into the corrosion container 1 ; the polytetrafluoroethylene liner 43 is horizontally disposed at the bottom end of the second frame 42 .

[0031] In practical applications, the glass rods 1000 are arranged in a vertically distributed posture in the space defined by the second frame 42. Since the bottom surface of the glass rods 1000 and the upper surface of the polytetrafluoroethylene pad 43 are in contact with each other, during the etching process of the glass rods 1000, the hydrofluoric acid solution will not excessively contact the bottom surface of the glass rods 1000, ensuring that only the side walls of the glass rods 1000 are corroded by the hydrofluoric acid solution, thereby ensuring the etching molding quality of the glass rods 1000.

[0032] In some embodiments, Figure 3As shown, in order to ensure that the glass rod 1000 is stably arranged in the space defined by the second frame 42 , the bracket 4 further includes a clamping assembly 44 , which is used to clamp the peripheral wall of the glass rod 1000 .

[0033] The clamping assembly 44 is configured to clamp the peripheral wall of the top end of the glass rod 1000. The clamped portion of the glass rod 1000 will not be corroded by the hydrofluoric acid solution. The clamping assembly 44 can adopt an electric clamping mechanism, a pneumatic clamping mechanism or a manual clamping mechanism.

[0034] Furthermore, if Figure 3 and Figure 4 As shown, the clamping assembly 44 includes two clamping units 441; the two clamping units 441 are distributed on opposite sides of the glass rod 1000, and each clamping unit 441 includes an adjusting handle 4411 and a clamping head 4412; the adjusting handle 4411 is rotatably disposed on the first frame 41 and is threadedly connected to the clamping head 4412; the clamping head 4412 is movably disposed on the second frame 42 along the horizontal direction; wherein the adjusting handle 4411 is used to control the clamping head 4412 to approach or move away from the glass rod 1000 by rotating, and the clamping heads 4412 of the two clamping units 441 cooperate with each other to clamp the glass rod 1000.

[0035] Specifically, the adjustment handle 4411 includes a handle and a screw, the handle is connected to one end of the screw, the screw is rotatably provided on the first frame 41, and the screw is threadedly connected to the clamping head 4412; since the clamping head 4412 is movably provided on the second frame 42 along the horizontal direction, when the handle is rotated, according to the threaded transmission between the screw and the clamping head 4412, the clamping head 4412 can be driven to move horizontally relative to the second frame 42 to achieve approaching or moving away from the glass rod 1000.

[0036] In order to ensure the reliability of clamping the glass rod 1000 , a notch that fits the peripheral wall of the glass rod 1000 may be provided at one end of the clamping head 4412 facing the glass rod 1000 , for example, the notch is an arc notch or a “V”-shaped notch.

[0037] In some embodiments, Figure 3 As shown, the corrosion device further includes a support frame 3; a weighing platform 2 is arranged at the lower side of the support frame 3, and a corrosion container 1 is arranged on the support frame 3; a receiving space is formed in the first frame 41, and the corrosion container 1 and part of the support frame 3 are arranged in the receiving space. This design enables the entire device to be compactly arranged without affecting the weighing of the glass rod 1000 by the weighing platform 2, thereby reducing the occupation of the site space.

[0038] In some embodiments, Figure 2As shown, the liquid storage tank 6 is connected to the inlet end of the pumping device 5 through the first pipeline 10, and the outlet end of the pumping device 5 is connected to the corrosion container 1 through the second pipeline 20; wherein, a first control valve 101 is arranged on the first pipeline 10, and a second control valve 102 is arranged on the second pipeline 20, and the control cabinet 8 is electrically connected to the first control valve 101 and the second control valve 102 respectively.

[0039] In this way, before corroding the glass rod 1000, when it is necessary to pump hydrofluoric acid solution into the corrosion container 1, the operator can send a control instruction to the control cabinet 8 through the monitoring platform 7. The control cabinet 8 controls the first control valve 101 and the second control valve 102 to open according to the received control instruction, and controls the pumping device 5 to start working. The hydrofluoric acid solution in the liquid storage tank 6 will enter the corrosion container 1 under the pumping of the pumping device 5.

[0040] In some embodiments, Figure 2 As shown, the corrosion container 1 is connected to the inlet end of the pumping device 5 through the third pipeline 30, and the outlet end of the pumping device 5 is connected to the liquid storage tank 6 through the fourth pipeline 40; wherein, a third control valve 103 is arranged on the third pipeline 30, and a fourth control valve 104 is arranged on the fourth pipeline 40, and the control cabinet 8 is electrically connected to the third control valve 103 and the fourth control valve 104 respectively.

[0041] In this way, when the corrosion of the glass rod 1000 is completed and the solution in the corrosion container 1 needs to be emptied, the operator can send a control instruction to the control cabinet 8 through the monitoring platform 7. The control cabinet 8 controls the third control valve 103 and the fourth control valve 104 to open according to the received control instruction, and controls the pumping device 5 to start working. The reacted solution stored in the corrosion container 1 will enter the liquid storage tank 6 under the pumping of the pumping device 5.

[0042] In some embodiments, Figure 2 As shown, the corrosion device also includes a waste liquid tank; the corrosion container 1 is connected to the waste liquid tank through a pumping device 5, and the liquid storage tank 6 is connected to the waste liquid tank through the pumping device 5.

[0043] It is understandable that, during the process of corroding the glass rod 1000, the concentration of the hydrofluoric acid solution in the corrosion container 1 gradually decreases as the corrosion progresses, and the corrosion efficiency of the glass rod 1000 will decrease. The lower the concentration of the hydrofluoric acid solution, the longer the corrosion time of the glass rod 1000; when the mass of the glass rod 1000 changes very slowly during the corrosion process (the unit mass exceeds the specified lower limit time), the hydrofluoric acid solution needs to be replaced; for example, the solution in the corrosion container 1 is pumped to the waste liquid tank by the pumping device 5, or the solution in the liquid storage tank 6 is pumped to the waste liquid tank by the pumping device 5.

[0044] Exemplarily, the liquid storage tank 6 is connected to the inlet end of the pumping device 5 through the first pipeline 10, and the outlet end of the pumping device 5 is connected to the waste liquid tank through the fifth pipeline 50; wherein, a first control valve 101 is provided on the first pipeline 10, and a fifth control valve 105 is provided on the fifth pipeline 50, and the control cabinet 8 is electrically connected to the first control valve 101 and the fifth control valve 105, respectively.

[0045] In this way, when it is determined that there is no residual solution in the corrosion container 1, the operator can send a control instruction to the control cabinet 8 through the monitoring platform 7. The control cabinet 8 controls the first control valve 101 and the fifth control valve 105 to open according to the received control instruction, and controls the pumping equipment 5 to start working. The solution in the liquid storage tank 6 will enter the waste liquid tank under the pumping of the pumping equipment 5.

[0046] Of course, if there is solution left in the corrosion container 1, the third control valve 103 and the fifth control valve 105 can be controlled to open through the monitoring platform 7, and the pumping device 5 can be controlled to start working. The solution stored in the corrosion container 1 will be pumped into the waste liquid tank by the pumping device 5.

[0047] Furthermore, if Figure 2 As shown, the corrosion device is further provided with a filling area 9 , and the pumping device 5 is used to pump the hydrofluoric acid solution in the filling area 9 into the liquid storage tank 6 .

[0048] It is understandable that after the solution in the corrosion container 1 and the liquid storage tank 6 is emptied, the unused hydrofluoric acid solution in the filling area 9 can be pumped into the liquid storage tank 6 by the pumping device 5 .

[0049] Exemplarily, the filling area 9 is provided with a plurality of finished product tanks, each of which stores unused hydrofluoric acid solution; the finished product tank is connected to the inlet end of the pumping device 5 through the sixth pipeline 60, and the outlet end of the pumping device 5 is connected to the liquid storage tank 6 through the fourth pipeline 40; wherein, a fourth control valve 104 is provided on the fourth pipeline 40, and a sixth control valve 106 is provided on the sixth pipeline 60, and a hose is provided at one end of the sixth pipeline 60 away from the pumping device 5, which can be connected to each finished product tank through the hose; the control cabinet 8 is electrically connected to the fourth control valve 104 and the sixth control valve 106, respectively.

[0050] In this way, when it is necessary to add new hydrofluoric acid solution to the liquid storage tank 6, the operator can send a control instruction to the control cabinet 8 through the monitoring platform 7. The control cabinet 8 controls the fourth control valve 104 and the sixth control valve 106 to open according to the received control instruction, and controls the pumping equipment 5 to start working, so as to pump the hydrofluoric acid solution in the filling area 9 into the liquid storage tank 6.

[0051] The first control valve 101 , the second control valve 102 , the third control valve 103 , the fourth control valve 104 , the fifth control valve 105 and the sixth control valve 106 shown in the above embodiment may all be solenoid valves resistant to corrosion by hydrofluoric acid solution.

[0052] In some embodiments, Figure 1 and Figure 2 As shown, the corrosion container 1 is provided with a first overflow port, which is connected to the waste liquid tank through a first overflow pipe 70; and / or the waste liquid tank is provided with a second overflow port, which is connected to the waste liquid tank through a second overflow pipe 80.

[0053] It is understandable that since hydrofluoric acid solution is a hazardous chemical, in actual application, in order to prevent safety accidents caused by the failure of the early warning of the liquid level sensor, the corrosion container 1 is connected to the waste liquid tank through the first overflow pipe 70, and the waste liquid tank is connected to the waste liquid tank through the second overflow pipe 80, thereby realizing anti-overflow protection for the corrosion container 1 and the waste liquid tank.

[0054] In some embodiments, the monitoring platform 7 includes a control module, a display module and an indication module; The weighing platform 2 is electrically connected to the control module, and the control module is electrically connected to the pumping equipment 5, the display module and the indication module respectively; the display module is used to display the weighing data collected by the weighing platform 2, and the control module is used to control the indication module to issue an indication message when the weighing data collected by the weighing platform 2 reaches the second weighing data.

[0055] Among them, the control module can be a PLC controller or a single-chip microcomputer, the display module can be an LCD display screen, and the indication module can be a buzzer or an audible and visual alarm.

[0056] In this way, when the weighing data collected by the weighing platform 2 reaches the second weighing data, the control module controls the control indication module to issue indication information to notify the operator to stop the etching operation on the glass rod 1000 in time.

[0057] like Figure 5 As shown, the embodiment of the present invention also provides a control method of the etching device for controlling the diameter of the glass rod as described above, comprising the following steps: Step 510, controlling the pumping device to pump the hydrofluoric acid solution in the liquid storage tank into the corrosion container; Step 520, when the hydrofluoric acid solution in the corrosion container reaches the corrosion height, the pumping device is controlled to stop working, the first weighing data collected by the weighing platform is obtained, and the glass rod is corroded based on the hydrofluoric acid solution in the corrosion container; Step 530, when the weighing data collected by the weighing platform reaches the second weighing data, the pumping device is controlled to pump the solution in the corrosion container into the liquid storage tank; wherein the second weighing data is determined by the first weighing data, the corrosion height, the density of the glass rod and the diameter of the glass rod before and after corrosion.

[0058] It is understandable that when etching the glass rod, the glass rod is first transferred to the space defined by the second frame, the polytetrafluoroethylene pad is supported on the bottom surface of the glass rod, and the upper end of the glass rod is fixed by a clamping assembly.

[0059] Next, the operator inputs an operating instruction to the monitoring platform. The monitoring platform controls the pumping equipment to start working according to the operating instruction, and controls the first control valve and the second control valve to open, so that the hydrofluoric acid solution in the liquid storage tank enters the corrosion container under the pumping of the pumping equipment. In this process, a liquid level sensor is used to collect the liquid level height of the hydrofluoric acid solution in the corrosion container.

[0060] Next, when the liquid level of the hydrofluoric acid solution in the corrosion container reaches the corrosion height, the monitoring platform controls the pumping equipment to stop working, and the monitoring platform displays the first weighing data collected by the weighing platform. At this time, the glass rod is corroded based on the hydrofluoric acid solution in the corrosion container; wherein, the first weighing data is the sum of the weight of the glass rod before corrosion, which is m1 and the weight of the bracket.

[0061] Then, when the weighing platform detects that the collected weighing data reaches the second weighing data, the monitoring platform controls the pumping equipment to start working, and controls the third control valve and the fourth control valve to open, so as to use the pumping equipment to pump the solution in the corrosion container into the liquid storage tank; wherein, the second weighing data is the weight of the glass rod after corrosion, which is the sum of m2 and the weight of the bracket.

[0062] Since the corroded part of the glass rod is cylindrical, the following calculation formula can be obtained: [π*(d1 / 2) 2 -π*(d2 / 2) 2 ]*h*ρ=m1-m2; In this way, by substituting the target diameter d2 of the glass rod into the above formula, the weight of the glass rod after corrosion is obtained as m2; since the weight of the bracket remains unchanged and the weight of the bracket can be obtained in advance, during the corrosion operation of the glass rod, the target weight that the weighing platform should weigh can be obtained based on the weight after corrosion m2 and the weight of the bracket. When the second weighing data collected by the weighing platform reaches the target weight, it can be considered that the corrosion operation on the glass rod has been completed.

[0063] Since the etching operation of the glass rod usually takes more than six hours, and the liquid application process before the etching of the glass rod and the liquid drainage process after the etching of the glass rod are usually completed within 2-3 minutes, it can be considered that the corrosion of the glass rod by these two processes will not affect the target diameter actually controlled by the glass rod, or this part of the impact can be ignored.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An etching device for controlling the diameter of a glass rod, characterized in that: include: Corrosion vessels, racks, weighing platforms, pumping equipment, storage tanks and monitoring platforms; The bracket is arranged on the weighing platform, and the bracket is used to fix the glass rod, and the glass rod is placed in the corrosion container; The liquid storage tank is connected to the corrosion container through the pumping device, and the monitoring platform is electrically connected to the weighing platform and the pumping device respectively; Before corroding the glass rod, the monitoring platform controls the pumping device to pump the hydrofluoric acid solution in the liquid storage tank into the corrosion container, and the weighing platform collects first weighing data when the hydrofluoric acid solution in the corrosion container reaches the corrosion height; After the glass rod is completely corroded, the weighing platform collects second weighing data, and the monitoring platform controls the pumping device to pump the solution in the corrosion container into the liquid storage tank; The second weighing data is determined by the first weighing data, the corrosion height, the density of the glass rod, and the diameter of the glass rod before and after corrosion.

2. The etching device for controlling the diameter of a glass rod according to claim 1, characterized in that: The bracket includes a first frame body, a second frame body and a polytetrafluoroethylene liner; The first frame is disposed on the weighing platform, and the second frame is connected to the first frame and extends into the corrosion container; The second frame is used to arrange the vertically distributed glass rods, and the polytetrafluoroethylene pads are arranged on the second frame and supported on the bottom surfaces of the glass rods.

3. The etching device for controlling the diameter of a glass rod according to claim 2, characterized in that: The bracket further comprises a clamping assembly, and the clamping assembly is used for clamping the peripheral wall of the glass rod.

4. The etching device for controlling the diameter of a glass rod according to claim 3, characterized in that: The clamping assembly includes two clamping units; The two clamping units are distributed on opposite sides of the glass rod, and each clamping unit includes an adjustment handle and a clamping head; the adjustment handle is rotatably disposed on the first frame and is threadedly connected to the clamping head; the clamping head is movably disposed on the second frame along a horizontal direction; The adjusting handle is used to control the clamping head to approach or move away from the glass rod by rotating, and the clamping heads of the two clamping units cooperate with each other to clamp the glass rod.

5. The etching device for controlling the diameter of a glass rod according to claim 2, characterized in that: The corrosion device also includes a support frame; The weighing platform is arranged at the lower side of the support frame, and the corrosion container is arranged on the support frame; an accommodating space is formed in the first frame body, and the corrosion container and part of the support frame are arranged in the accommodating space.

6. The etching device for controlling the diameter of a glass rod according to any one of claims 1 to 5, characterized in that: The corrosion device also includes a waste liquid tank; The corrosion container is communicated with the waste liquid tank through the pumping device, and the liquid storage tank is communicated with the waste liquid tank through the pumping device.

7. The etching device for controlling the diameter of a glass rod according to claim 6, characterized in that: The corrosion container is provided with a first overflow port, which is connected to the waste liquid tank through a first overflow pipeline; and / or the waste liquid tank is provided with a second overflow port, which is connected to the waste liquid tank through a second overflow pipeline.

8. The etching device for controlling the diameter of a glass rod according to any one of claims 1 to 5, characterized in that: The corrosion device is also provided with a filling area, and the pumping equipment is used to pump the hydrofluoric acid solution in the filling area into the liquid storage tank.

9. The etching device for controlling the diameter of a glass rod according to any one of claims 1 to 5, characterized in that: The monitoring platform includes a control module, a display module and an indication module; The weighing platform is electrically connected to the control module, and the control module is electrically connected to the pumping device, the display module and the indication module respectively; The display module is used to display the weighing data collected by the weighing platform, and the control module is used to control the indication module to issue indication information when the weighing data collected by the weighing platform reaches the second weighing data.

10. A control method for an etching device for controlling the diameter of a glass rod according to any one of claims 1 to 9, characterized in that: include: Control the pumping equipment to pump the hydrofluoric acid solution in the storage tank into the corrosion container; When the hydrofluoric acid solution in the corrosion container reaches a corrosion height, the pumping device is controlled to stop working, the first weighing data collected by the weighing platform is acquired, and the glass rod is corroded based on the hydrofluoric acid solution in the corrosion container; When the weighing data collected by the weighing platform reaches the second weighing data, controlling the pumping device to pump the solution in the corrosion container into the liquid storage tank; The second weighing data is determined by the first weighing data, the corrosion height, the density of the glass rod, and the diameter of the glass rod before and after corrosion.

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