An etching apparatus and method for controlling the diameter of a glass rod

Abstract

The present application relates to the technical field of optical fiber manufacturing, and provides an etching device and method for controlling the diameter of a glass rod. The etching device comprises 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 for fixing the glass rod and containing the glass rod in the etching container. The liquid storage tank is connected to the etching container through the pumping device, and the monitoring platform is electrically connected to the weighing platform and the pumping device. Before etching the glass rod, the monitoring platform controls the pumping device to pump the hydrofluoric acid solution in the liquid storage tank into the etching container, and the weighing platform collects first weighing data when the hydrofluoric acid solution in the etching container reaches an etching height. After the etching of the glass rod is completed, the weighing platform collects second weighing data, and the monitoring platform controls the pumping device to pump the solution in the etching container into the liquid storage tank. The present application can accurately etch the glass rod and ensure the etching efficiency of the glass rod.

Description

Technical Field

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

[0002] In optical fiber production, when the diameter of the produced glass rod (a cylindrical rod primarily composed of silicon dioxide) is larger than the target diameter, hydrofluoric acid solution is used to etch the glass rod, reducing its diameter until the target diameter is reached. Hydrofluoric acid (HF) reacts with the silicon dioxide (SiO2) in the glass to produce gaseous silicon tetrafluoride (SiF4) and water (H2O). This reaction process utilizes the strong corrosiveness of hydrofluoric acid to etch the glass rod.

[0003] However, in practical applications, to strictly control the diameter of the glass rod, operators need to manually remove the glass rod from the hydrofluoric acid solution during the corrosion process and measure its diameter using calipers. Because the concentration of the hydrofluoric acid solution gradually decreases during use, the corrosion efficiency of the glass rod decreases, requiring an increased corrosion time. Furthermore, since the concentration of hydrofluoric acid changes dynamically with use, the corrosion time cannot be determined precisely. Therefore, the number of tests and the duration of the entire testing process are uncertain, requiring operators to perform repeated tests. Given the safety hazards posed by frequent contact with hydrofluoric acid during multiple measurements, protective clothing must be changed after each operation. This process consumes a significant amount of time, increasing workload and impacting the corrosion efficiency of the glass rod. Summary of the Invention

[0004] This invention provides a corrosion device and method for controlling the diameter of a glass rod, which at least solves or improves the problems of time-consuming and labor-intensive corrosion operations on glass rods in the prior art, and makes it difficult to ensure the corrosion efficiency of the glass rod.

[0005] The present invention provides a corrosion device for controlling the diameter of a glass rod, comprising: a corrosion container, a bracket, a weighing platform, a pumping device, a storage tank, and a monitoring platform;

[0006] The bracket is mounted on the weighing platform and is used to fix the glass rod, which is placed in the corrosion container; the liquid storage tank is connected to the corrosion container through the pumping equipment, and the monitoring platform is electrically connected to the weighing platform and the pumping equipment respectively.

[0007] Before corroding the glass rod, the monitoring platform controls the pumping equipment to pump the hydrofluoric acid solution in the storage tank to the corrosion container, and the weighing platform collects the first weighing data when the hydrofluoric acid solution in the corrosion container reaches the corrosion height.

[0008] After the glass rod has been etched, the weighing platform collects second weighing data, and the monitoring platform controls the pumping equipment to pump the solution in the etching container to the storage tank.

[0009] 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.

[0010] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, wherein the bracket includes a first frame, a second frame, and a polytetrafluoroethylene liner;

[0011] The first frame is mounted on the weighing platform, and the second frame is connected to the first frame and extends into the corrosion container;

[0012] The second frame is used to house the vertically distributed glass rods, and the polytetrafluoroethylene liner is provided in the second frame and supports the bottom surface of the glass rods.

[0013] According to the corrosion device for controlling the diameter of a glass rod provided by the present invention, the bracket further includes a clamping assembly for clamping the glass rod to the peripheral wall.

[0014] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, wherein the clamping assembly includes two clamping units;

[0015] Two clamping units are distributed on opposite sides of the glass rod. Each clamping unit includes an adjusting handle and a clamping head. The adjusting handle is rotatably disposed on the first frame and threadedly connected to the clamping head. The clamping head is movably disposed on the second frame in the horizontal direction.

[0016] The adjusting handle is used to control the clamping head to move closer to or away from the glass rod by rotating it. The clamping heads of the two clamping units cooperate to clamp the glass rod.

[0017] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, the corrosion device further includes a support frame;

[0018] The weighing platform is located on the lower side of the support frame, and the corrosion container is located on the support frame; a receiving space is formed inside the first frame, and the corrosion container and part of the support frame are located in the receiving space.

[0019] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, the corrosion device further includes a waste liquid tank;

[0020] The corrosion container is connected to the waste liquid tank via the pumping equipment, and the storage tank is connected to the waste liquid tank via the pumping equipment.

[0021] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, wherein the corrosion container is provided with a first overflow port, the first overflow port being connected to the waste liquid tank through a first overflow pipe; and / or, the waste liquid tank is provided with a second overflow port, the second overflow port being connected to the waste liquid tank through a second overflow pipe.

[0022] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, the corrosion device further comprising a filling area, and a pumping device for pumping hydrofluoric acid solution in the filling area to the storage tank.

[0023] According to the present invention, a corrosion device for controlling the diameter of a glass rod is provided, wherein the monitoring platform includes a control module, a display module, and an indicator module;

[0024] The weighing platform and the control module are electrically connected, and the control module is electrically connected to the pumping equipment, the display module and the indicator module respectively.

[0025] The display module is used to display the weighing data collected by the weighing platform, and the control module is used to control the indicator module to issue an indication message when the weighing data collected by the weighing platform reaches the second weighing data.

[0026] The present invention also provides a control method for the corrosion device for controlling the diameter of the glass rod as described above, comprising: controlling a pumping device to pump the hydrofluoric acid solution in the storage tank to the corrosion container;

[0027] When the hydrofluoric acid solution in the corrosion container reaches the corrosion height, the pumping equipment 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.

[0028] When the weighing data collected by the weighing platform reaches the second weighing data, the pumping equipment is controlled to pump the solution in the corrosion container into the storage tank.

[0029] 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.

[0030] The corrosion device and method for controlling the diameter of a glass rod provided by this invention, by setting up a corrosion container, a bracket, a weighing platform, a pumping device, a storage tank, and a monitoring platform, allows the monitoring platform to control the pumping device to pump the hydrofluoric acid solution stored in the storage tank into the corrosion container before corrosion of the glass rod. After corrosion of the glass rod is completed, the monitoring platform controls the pumping device to pump the solution in the corrosion container into the storage tank. During the corrosion operation of the glass rod, based on the morphology of the corroded part of the glass rod, the weighing platform weighs the glass rod before and after corrosion to accurately control the corrosion process. This design enables automatic corrosion of the glass rod, eliminating the need for operators to repeatedly remove and measure the glass rod, ensuring that the glass rod accurately reaches the actual target diameter, avoiding repeated contact with hazardous chemicals by operators, and ensuring the corrosion efficiency of the glass rod. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural schematic diagram of the corrosion device for controlling the diameter of a glass rod provided by the present invention;

[0033] Figure 2 This is a top view schematic diagram of the corrosion device for controlling the diameter of a glass rod provided by the present invention;

[0034] Figure 3 This is a schematic diagram of the corrosion container, weighing platform, support frame and bracket provided by the present invention, arranged in a relative manner;

[0035] Figure 4 This is a schematic diagram of the weighing platform, support frame, and bracket provided by the present invention, arranged in a relative manner;

[0036] Figure 5 This is a schematic flowchart of the control method for the corrosion device for controlling the diameter of a glass rod provided by the present invention;

[0037] Figure label:

[0038] 1. Corrosion-prone containers; 2. Weighing platforms; 3. Support frames;

[0039] 4. Bracket; 41. First frame; 42. Second frame; 43. PTFE liner; 44. Clamping assembly; 441. Clamping unit; 4411. Adjusting handle; 4412. Clamping head;

[0040] 5. Pumping equipment; 6. Storage tank; 7. Monitoring platform; 8. Control cabinet; 9. Filling area;

[0041] 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;

[0042] 101. First control valve; 102. Second control valve; 103. Third control valve; 104. Fourth control valve; 105. Fifth control valve; 106. Sixth control valve;

[0043] 1000, glass rod. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0045] The following is combined Figures 1-5 The corrosion device and method for controlling the diameter of a glass rod provided in the present invention will be described in detail through specific embodiments and application scenarios.

[0046] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a corrosion device for controlling the diameter of a glass rod, comprising: a corrosion container 1, a bracket 4, a weighing platform 2, a pumping device 5, a storage tank 6, and a monitoring platform 7;

[0047] The bracket 4 is set on the weighing platform 2. The bracket 4 is used to fix the glass rod 1000 and place the glass rod 1000 in the corrosion container 1. The storage tank 6 is connected to the corrosion container 1 through the pumping equipment 5. The monitoring platform 7 is electrically connected to the weighing platform 2 and the pumping equipment 5 respectively.

[0048] Before corroding the glass rod 1000, the monitoring platform 7 controls the pumping equipment 5 to pump the hydrofluoric acid solution in the storage tank 6 to 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.

[0049] After the glass rod 1000 completes the corrosion, the weighing platform 2 collects the second weighing data, and the monitoring platform 7 controls the pumping equipment 5 to pump the solution in the corrosion container 1 to the storage tank 6.

[0050] 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.

[0051] Understandably, the main material of the glass rod 1000 is silicon dioxide. This invention can use hydrofluoric acid solution to corrode the glass rod 1000, and the chemical reaction equation is as follows:

[0052] SiO2 + 4HF = SiF4 + 2H2O;

[0053] Since the silicon tetrafluoride (SiF4) generated by the above reaction is in a gaseous state, the corroded part on the glass rod 1000 is cylindrical during the corrosion process.

[0054] Let m1 be the weight of glass rod 1000 before corrosion and m2 be the weight of glass rod 1000 after corrosion. The first weighing data is the sum of the weight of glass rod 1000 before corrosion (m1) and the weight of bracket 4. The second weighing data is the sum of the weight of glass rod 1000 after corrosion (m2) and the weight of bracket 4.

[0055] As shown above, the weight of the corroded part on the glass rod 1000 is m1-m2. Geometric calculations can be used to obtain the weight of the corroded part on the glass rod 1000.

[0056] Let the density of glass rod 1000 be ρ, the corrosion height of glass rod 1000 be h, the diameter of glass rod 1000 before corrosion be d1, and the diameter of glass rod 1000 after corrosion be d2, where d2 is also the target diameter that glass rod 1000 should achieve after corrosion. Since the corroded part of glass rod 1000 is cylindrical, we can obtain the following calculation formula:

[0057] [π*(d1 / 2)] 2 -π*(d2 / 2) 2 [h*ρ=m1-m2;]

[0058] Thus, by substituting the target diameter d2 of the glass rod 1000 into the above formula, the weight of the glass rod 1000 after corrosion, m2, can be obtained. Since the weight of the bracket 4 remains unchanged and can be obtained by pre-weighing, the target weight that the weighing platform 2 should weigh can be obtained based on the weight m2 of the glass rod 1000 after corrosion and the weight of the bracket 4 during the corrosion operation of the glass rod 1000. When the second weighing data collected by the weighing platform 2 reaches the target weight, the corrosion operation of the glass rod 1000 can be considered to be completed.

[0059] Since hydrofluoric acid is a highly corrosive acid that corrodes glass rod 1000, metals, etc., the bracket 4, corrosion container 1, storage tank 6, and pipelines between corrosion container 1 and storage tank 6 can all be made of polytetrafluoroethylene (PTFE). Furthermore, the pumping equipment 5 uses a fluoroplastic chemical pump to ensure the normal operation of the pumping equipment 5.

[0060] Meanwhile, the monitoring platform 7 is equipped with a touch screen and / or electronic control buttons. The weighing platform 2 and the monitoring platform 7 are electrically connected. The monitoring platform 7 is electrically connected to the microcontroller, PLC controller and other control modules in the control cabinet 8. The control modules in the control cabinet 8 are electrically connected to the pumping equipment 5.

[0061] The corrosion device of this invention, by setting up a corrosion container 1, a bracket 4, a weighing platform 2, a pumping device 5, a storage tank 6, and a monitoring platform 7, allows the monitoring platform 7 to control the pumping device 5 to pump the hydrofluoric acid solution stored in the storage tank 6 into the corrosion container 1 before corrosion of the glass rod 1000. After corrosion of the glass rod 1000 is completed, the monitoring platform 7 controls the pumping device 5 to pump the solution in the corrosion container 1 into the storage tank 6. During the corrosion operation of the glass rod 1000, based on the morphology of the corroded part of the glass rod 1000, the weighing platform 2 weighs the glass rod 1000 before and after corrosion, thereby accurately controlling the corrosion process of the glass rod 1000. This design enables automatic corrosion of the glass rod 1000, eliminating the need for operators to repeatedly remove and measure the glass rod 1000, ensuring that the glass rod 1000 accurately reaches the actual target diameter, avoiding repeated contact with hazardous chemicals by operators, and ensuring the corrosion efficiency of the glass rod 1000.

[0062] In some embodiments, such as Figure 3 and Figure 4 As shown, the bracket 4 includes a first frame 41, a second frame 42, and a polytetrafluoroethylene liner 43;

[0063] The first frame 41 is mounted on the weighing platform 2. 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 mount vertically distributed glass rods 1000. A polytetrafluoroethylene gasket 43 is mounted on the second frame 42 and supports the bottom surface of the glass rods 1000.

[0064] Understandably, both the first frame 41 and the second frame 42 are vertically arranged, with the bottom of the first frame 41 placed on the weighing platform 2, and the top of the first frame 41 connected to the top of the second frame 42.

[0065] 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 gasket 43 is horizontally disposed at the bottom end of the second frame 42.

[0066] In practical applications, the glass rods 1000 are arranged vertically within the space defined by the second frame 42. Since the bottom surface of the glass rods 1000 is in contact with the upper surface of the polytetrafluoroethylene gasket 43, the hydrofluoric acid solution will not come into excessive contact with the bottom surface of the glass rods 1000 during the corrosion process. This ensures that only the sidewalls of the glass rods 1000 are corroded by the hydrofluoric acid solution, thereby ensuring the corrosion forming quality of the glass rods 1000.

[0067] In some embodiments, such as Figure 3 As shown, in order to ensure that the glass rod 1000 is stably arranged within the space defined by the second frame 42, the bracket 4 also includes a clamping component 44, which is used to clamp the peripheral wall of the glass rod 1000.

[0068] The clamping component 44 is configured to clamp the peripheral wall of the top end of the glass rod 1000. The clamped part of the glass rod 1000 will not be corroded by the hydrofluoric acid solution. The clamping component 44 can be an electric clamping mechanism, a pneumatic clamping mechanism, or a manual clamping mechanism.

[0069] Furthermore, such as 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 threadedly connected to the clamping head 4412; the clamping head 4412 is movably disposed on the second frame 42 in the horizontal direction; wherein, the adjusting handle 4411 is used to control the clamping head 4412 to move closer to or away from the glass rod 1000 by rotation, and the clamping heads 4412 of the two clamping units 441 cooperate to clamp the glass rod 1000.

[0070] Specifically, the adjusting handle 4411 includes a handle and a screw. One end of the handle and the screw are connected. The screw is rotatably mounted on the first frame 41 and is threadedly connected to the clamping head 4412. Since the clamping head 4412 is movably mounted on the second frame 42 in the horizontal direction, when the handle is turned, the screw and the clamping head 4412 can be moved horizontally relative to the second frame 42 by means of the threaded transmission between the screw and the clamping head 4412, so as to move closer to or away from the glass rod 1000.

[0071] In order to ensure the reliability of clamping the glass rod 1000, the end of the clamping head 4412 facing the glass rod 1000 can be provided with a notch that fits the peripheral wall of the glass rod 1000, such as an arc-shaped notch or a "V"-shaped notch.

[0072] In some embodiments, such as Figure 3 As shown, the corrosion device also includes a support frame 3; a weighing platform 2 is located on the lower side of the support frame 3, and the corrosion container 1 is located on the support frame 3; a receiving space is formed within the first frame 41, and the corrosion container 1 and part of the support frame 3 are located in the receiving space. This design allows the entire device to be compactly arranged without affecting the weighing of the glass rod 1000 by the weighing platform 2, thus reducing the space occupied.

[0073] In some embodiments, such as Figure 2 As shown, the 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 provided on the first pipeline 10, and a second control valve 102 is provided 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.

[0074] Thus, before corroding the glass rod 1000, when it is necessary to pump hydrofluoric acid solution into the corrosion container 1, the operator can send control commands to the control cabinet 8 through the monitoring platform 7. The control cabinet 8 controls the opening of the first control valve 101 and the second control valve 102 according to the received control commands, and controls the pumping equipment 5 to start working. The hydrofluoric acid solution in the storage tank 6 will enter the corrosion container 1 under the pumping of the pumping equipment 5.

[0075] In some embodiments, such as 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 storage tank 6 through the fourth pipeline 40. A third control valve 103 is installed on the third pipeline 30, and a fourth control valve 104 is installed on the fourth pipeline 40. The control cabinet 8 is electrically connected to the third control valve 103 and the fourth control valve 104 respectively.

[0076] Thus, when the glass rod 1000 is etched and the solution in the corrosion container 1 needs to be emptied, the operator can send control commands 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 commands, and controls the pumping equipment 5 to start working. The reacted solution stored in the corrosion container 1 will enter the storage tank 6 under the pumping of the pumping equipment 5.

[0077] In some embodiments, such as Figure 2 As shown, the corrosion device also includes a waste liquid tank; the corrosion container 1 is connected to the waste liquid tank via a pumping device 5, and the storage tank 6 is connected to the waste liquid tank via a pumping device 5.

[0078] Understandably, during the corrosion of glass rod 1000, the concentration of hydrofluoric acid solution in corrosion container 1 gradually decreases as the corrosion progresses, thus reducing the corrosion efficiency of glass rod 1000. The lower the concentration of hydrofluoric acid solution, the longer the corrosion time for glass rod 1000. When the mass change of glass rod 1000 during the corrosion process is very slow (the unit mass exceeds the specified lower limit time), the hydrofluoric acid solution needs to be replaced. For example, the solution in corrosion container 1 can be pumped to the waste liquid tank using pumping equipment 5, or the solution in storage tank 6 can be pumped to the waste liquid tank using pumping equipment 5.

[0079] For example, the 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, 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.

[0080] Thus, when it is determined that there is no remaining solution in the corrosion container 1, the operator can send a control command to the control cabinet 8 through the monitoring platform 7. The control cabinet 8 controls the opening of the first control valve 101 and the fifth control valve 105 according to the received control command, and controls the pumping equipment 5 to start working. The solution in the storage tank 6 will enter the waste liquid tank under the pumping of the pumping equipment 5.

[0081] Of course, if there is a solution remaining in the corrosion container 1, the third control valve 103 and the fifth control valve 105 can be opened through the monitoring platform 7, and the pumping equipment 5 can be started. The solution stored in the corrosion container 1 will be pumped into the waste liquid tank by the pumping equipment 5.

[0082] Furthermore, such as Figure 2 As shown, the corrosion device also includes a filling area 9, and a pumping device 5 is used to pump the hydrofluoric acid solution from the filling area 9 to the storage tank 6.

[0083] Understandably, after the solution in the corrosion container 1 and the storage tank 6 has been emptied, the unused hydrofluoric acid solution in the filling area 9 can be pumped to the storage tank 6 using the pumping equipment 5.

[0084] For example, the filling area 9 is provided with multiple finished product tanks, each of which stores unused hydrofluoric acid solution; the finished product tanks are connected to the inlet end of the pumping device 5 via a sixth pipeline 60, and the outlet end of the pumping device 5 is connected to the storage tank 6 via a 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 the 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.

[0085] Thus, when it is necessary to replenish the storage tank 6 with new hydrofluoric acid solution, the operator can send a control command 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 and the pumping equipment 5 to start working, so as to pump the hydrofluoric acid solution from the filling area 9 into the storage tank 6.

[0086] In the above embodiments, 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 can all be solenoid valves resistant to hydrofluoric acid solution corrosion.

[0087] In some embodiments, such as 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.

[0088] Understandably, since hydrofluoric acid solution is a hazardous chemical, in practical applications, in order to prevent safety accidents due to the failure of the liquid level sensor's warning, 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, so as to achieve overflow protection for the corrosion container 1 and the waste liquid tank.

[0089] In some embodiments, the monitoring platform 7 includes a control module, a display module, and an indicator module;

[0090] 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 indicator 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 indicator module to issue an indication message when the weighing data collected by the weighing platform 2 reaches the second weighing data.

[0091] The control module can be a PLC controller or a microcontroller, the display module can be an LCD screen, and the indicator module can be a buzzer or an audible and visual alarm.

[0092] Thus, when the weighing data collected by the weighing platform 2 reaches the second weighing data, the control module controls the control indicator module to issue an instruction message to notify the operator to stop the corrosion operation on the glass rod 1000 in time.

[0093] like Figure 5 As shown, this embodiment of the invention also provides a control method for the corrosion device for controlling the diameter of a glass rod as described above, comprising the following steps:

[0094] Step 510: Control the pumping equipment to pump the hydrofluoric acid solution in the storage tank to the corrosion container;

[0095] Step 520: When the hydrofluoric acid solution in the corrosion container reaches the corrosion height, control the pumping equipment to stop working, obtain the first weighing data collected by the weighing platform, and corrode the glass rod based on the hydrofluoric acid solution in the corrosion container.

[0096] Step 530: When the weighing data collected by the weighing platform reaches the second weighing data, control the pumping equipment to pump the solution in the corrosion container to the 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.

[0097] Understandably, when etching the glass rod, the glass rod is first transferred to the space defined by the second frame, ensuring that the PTFE liner supports the bottom of the glass rod, and the upper end of the glass rod is fixed by a clamping assembly.

[0098] Next, the operator inputs operating instructions into the monitoring platform. The monitoring platform controls the pumping equipment to start working according to the operating instructions, and controls the opening of the first control valve and the second control valve so that the hydrofluoric acid solution in the storage tank enters the corrosion container under the pumping of the pumping equipment. During this process, the liquid level sensor collects the liquid level height of the hydrofluoric acid solution in the corrosion container.

[0099] Next, when 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, m1, and the weight of the bracket.

[0100] Next, when the weighing platform detects that the collected weighing data has reached the second weighing data, the monitoring platform controls the pumping equipment to start working and controls the third and fourth control valves to open, so as to use the pumping equipment to pump the solution in the corrosion container to the storage tank; wherein, the second weighing data is the sum of the weight of the glass rod after corrosion (m2) and the weight of the bracket.

[0101] Since the corroded part on the glass rod is cylindrical, the following calculation formula can be obtained:

[0102] [π*(d1 / 2)] 2 -π*(d2 / 2) 2 [h*ρ=m1-m2;]

[0103] Thus, by substituting the target diameter d2 of the glass rod into the above formula, the weight of the glass rod after corrosion, m2, can be obtained. Since the weight of the bracket remains unchanged and can be obtained by pre-weighing, 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 during the glass rod corrosion operation. When the second weighing data collected by the weighing platform reaches the target weight, the glass rod corrosion operation can be considered to be completed.

[0104] Since the corrosion operation of the glass rod usually takes more than six hours, while the liquid loading process before corrosion and the liquid draining process after corrosion are usually completed within 2-3 minutes, it can be assumed that the corrosion of the glass rod during the liquid loading and draining processes will not affect the actual target diameter of the glass rod, or this effect can be ignored.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An etching apparatus for controlling the diameter of a glass rod, characterized by, The corrosion device comprises a corrosion container, a bracket, a weighing platform, a pumping device, a storage tank and a monitoring platform. The bracket is arranged on the weighing platform and used for fixing a glass rod and containing the glass rod in the corrosion container. The storage tank is communicated with the corrosion container through the pumping device, and the monitoring platform is electrically connected with the weighing platform and the pumping device respectively. Before the glass rod is corroded, the monitoring platform controls the pumping device to pump hydrofluoric acid solution in the storage tank into the corrosion container, and the weighing platform collects first weighing data when the hydrofluoric acid solution in the corrosion container reaches a corrosion height. After the glass rod is 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 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. 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 storage tank is communicated with the waste liquid tank through the pumping device. The monitoring platform comprises a control module, a display module and an indication module, the weighing platform is electrically connected with the control module, the control module is electrically connected with the pumping device, the display module and the indication module respectively, the display module is used for displaying the weighing data collected by the weighing platform, and the control module is used for controlling the indication module to send indication information when the weighing data collected by the weighing platform reaches the second weighing data. The bracket comprises a first bracket body, a second bracket body and a polytetrafluoroethylene gasket.

2. The etching apparatus for controlling the diameter of a glass rod according to claim 1, wherein The first bracket body is arranged on the weighing platform, the second bracket body is connected with the first bracket body and extends into the corrosion container, and the polytetrafluoroethylene gasket is arranged in the second bracket body and bears on the bottom surface of the glass rod. The bracket further comprises a clamping assembly used for clamping the circumferential wall of the glass rod. The clamping assembly comprises two clamping units.

3. The etching apparatus for controlling the diameter of a glass rod according to claim 2, wherein The two clamping units are arranged on opposite sides of the glass rod, each clamping unit comprises an adjusting handle and a clamping head, the adjusting handle is rotatably arranged on the first bracket body and is threadedly connected with the clamping head, and the clamping head is movably arranged on the second bracket body in the horizontal direction.

4. The etching apparatus for controlling the diameter of a glass rod according to claim 3, wherein The adjusting handle is used for controlling the clamping head to approach or move away from the glass rod by rotating, and the clamping heads of the two clamping units are matched to clamp the glass rod. The corrosion device further comprises a support frame. The weighing platform is arranged on the lower side of the support frame, the corrosion container is arranged on the support frame, the first bracket body forms a containing space, and the corrosion container and part of the support frame are arranged in the containing space.

5. The etching apparatus for controlling the diameter of a glass rod according to claim 2, wherein ​ ​ 6. The etching apparatus for controlling the diameter of a glass rod according to claim 1, wherein The corrosion container is provided with a first overflow port communicated with the waste liquid tank through a first overflow pipeline; and / or the waste liquid tank is provided with a second overflow port communicated with the waste liquid tank through a second overflow pipeline.

7. The apparatus according to any one of claims 1 to 4, wherein The corrosion device is also provided with a filling area, and the pumping device is used for pumping the hydrofluoric acid solution in the filling area into the storage tank.

8. A control method of a control apparatus of a glass rod diameter etching device according to any one of claims 1 to 7, characterized by, The method comprises: controlling the pumping device 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, controlling the pumping device to stop working, acquiring first weighing data collected by the weighing platform, and corroding the glass rod based on the hydrofluoric acid solution in the corrosion container; when the weighing data collected by the weighing platform reaches second weighing data, controlling the pumping device to pump the solution in the corrosion container into the 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 diameters of the glass rod before and after corrosion.

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