Liquid level measuring device and measuring method for liquid crystal glass substrate production

Abstract

The invention provides a liquid level measuring device for liquid crystal glass substrate production and a measuring method, the liquid level measuring device comprises a support frame mounted on one side of a glass liquid container, the top of the glass liquid container is provided with a through hole communicated with the interior of the glass liquid container, and one end of the support frame extends to the upper part of the through hole. Through the design of the telescopic mechanism, the cleaning mechanism and the limiting mechanism, the cleaning mechanism extends into the molten glass container through the telescopic mechanism, so that the cleaning mechanism is in contact with the bottom of the outer side wall of the detection floating ball, and at the moment, the limiting mechanism limits the upward sliding of the measuring rod on the supporting frame; the bottom position of the outer side wall of the detection floating ball can be scraped and cleaned through the cleaning mechanism, so that the situation that in the long-term monitoring process of the glass liquid level, attachments are attached to the surface of the detection floating ball, the weight of the detection floating ball is changed, and the buoyancy of the detection floating ball is changed is effectively avoided; therefore, the detection precision of the glass liquid level is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal glass processing equipment, and in particular to a liquid level measuring device and a measuring method for producing liquid crystal glass substrates. Background Art

[0002] Liquid crystal glass substrates are the core basic materials of the flat panel display industry. Their manufacturing process requires ultra-precision control. In the production of liquid crystal glass substrates, controlling the liquid glass level is crucial. Accurately measuring the liquid level ensures the thickness uniformity of the glass substrate and the stability of the production process.

[0003] Traditional liquid level measurement methods, such as mechanical probes, suffer from issues such as wear and tear and a significant impact on measurement accuracy due to contact. Currently, float-type level gauges are commonly used for glass liquid level measurement. These are characterized by high temperature resistance, anti-interference, and low maintenance, and have become a standard feature in LCD glass substrate production.

[0004] However, the use of float level gauges in the long-term monitoring of glass liquid levels still has the following defects:

[0005] The surface of the float is prone to attachments such as photoresist residues and metal oxides, which can cause the weight of the float to change, resulting in changes in the buoyancy of the float, thereby reducing the accuracy of glass liquid level detection;

[0006] Therefore, the present application proposes a liquid level measuring device and a measuring method for liquid crystal glass substrate production. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides a liquid level measuring device and a measuring method for liquid crystal glass substrate production, which solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A liquid level measuring device for producing liquid crystal glass substrates includes a support frame mounted on one side of a glass liquid container. The top of the glass liquid container is provided with a through hole communicating with the interior of the container, and one end of the support frame extends above the through hole.

[0010] The end of the support frame is located directly above the through hole and is vertically movable and extends through a measuring rod that can be extended into the glass liquid container. A scale line is provided on one side of the measuring rod. The bottom of the measuring rod extends into the glass liquid container and is installed with a detection float. A laser rangefinder is fixedly installed on the top of the support frame and on one side of the measuring rod. A measuring plate is fixedly installed on the top of the measuring rod, and one side of the measuring plate extends above the laser rangefinder.

[0011] A telescopic mechanism is installed on the support frame and on one side of the measuring rod. The telescopic rod of the telescopic mechanism can pass through the through hole and extend into the glass liquid container, and a connecting column is installed at the telescopic end of the telescopic mechanism. A cleaning mechanism acting on the detection float is installed on the connecting column, which is used to scrape and clean the bottom position of the outer side wall of the detection float. A limiting mechanism acting on the measuring rod is installed on the support frame, which is used to limit the measuring rod from sliding upward on the support frame.

[0012] Further: the telescopic mechanism includes a fixed block fixedly installed at the bottom of the support frame and located on one side of the measuring rod, a vertical telescopic rod is symmetrically fixed to the bottom of the fixed block, the bottoms of the two telescopic rods are fixedly connected with a connecting plate, a driving rod fixedly installed at the bottom of the fixed block is fixedly connected to the connecting plate, and a connecting column is fixedly installed at the bottom of the connecting plate.

[0013] Further: the cleaning mechanism includes an annular mounting plate fixedly mounted on the bottom of the connecting column, the detection float can movably pass through the inner side of the annular mounting plate, an annular rotating plate is rotatably mounted on the bottom of the annular mounting plate, a driving assembly for driving the annular rotating plate is mounted on the annular mounting plate, a connecting frame is fixedly mounted on the bottom of the annular rotating plate and located on one side of the detection float, a rotating plate is rotatably mounted on the bottom of the connecting frame, an arc-shaped scraper is mounted on the end of the rotating plate close to the detection float, the inner concave surface of the arc-shaped scraper can be fitted with the bottom position of the outer side wall of the detection float, and a driving rod 2 for driving the rotating plate to rotate is hinged on the side of the connecting frame away from the detection float.

[0014] Further: the limiting mechanism includes a telescopic rod 2, a connecting seat and a driving rod 3. The bottom of the support frame and both sides of the measuring rod are fixedly installed with a vertical telescopic rod 2, the bottom of the telescopic rod 2 is fixedly installed with a connecting seat, and the bottom of the support frame is fixedly installed with a driving rod 3 fixedly connected to the connecting seat. The bottom positions on both sides of the measuring rod and below the connecting seat are integrally formed with a limiting frame.

[0015] Further: the connecting seat includes a base fixedly connected to the telescopic rod 2 and the driving rod 3, a spring telescopic rod 1 is symmetrically fixedly installed on the bottom of the base, a contact plate is fixedly installed on the bottom of the two spring telescopic rods 1, and a pressure sensor 1 in contact with the contact plate is fixedly installed on the bottom of the base and located between the two spring telescopic rods 1.

[0016] Further: an auxiliary measuring component is installed on the connecting plate and on the side of the connecting frame away from the detection float, and the auxiliary measuring component includes a fixing frame fixedly installed on the top of the connecting plate and away from the side of the measuring rod, a vertical telescopic rod three is fixedly installed on the fixing frame and located on the outside of the connecting plate, a mounting seat is fixedly installed at the bottom of the telescopic rod three, a measuring float is fixedly installed at the bottom of the mounting seat, a vertical driving rod four is fixedly installed at the bottom of the fixing frame, the piston rod of the driving rod four is fixedly installed with a fixing plate, and a pressure sensor two that can contact the mounting seat is fixedly installed at the bottom of the fixing plate.

[0017] Furthermore, the detection float is detachably mounted on the bottom of the measuring rod, and a fixing seat is integrally formed on the top of the detection float. A clamping mechanism is symmetrically mounted on the fixing seat, and the fixing seat is clamped with the two limiting frames through two sets of clamping mechanisms.

[0018] The clamping mechanism includes a clamping block fixedly mounted on the top of the fixing seat, a through-hole is provided at the bottom of the limiting frame, and two clamping blocks can movably pass through the two through-holes respectively. Mounting grooves are symmetrically provided on both sides of the clamping block. When the fixing seat is in contact with the bottom of the limiting frame, the bottom wall of the mounting groove is flush with the bottom wall of the limiting frame. Two spring telescopic rods are symmetrically fixedly mounted on the clamping block and located in the mounting groove. The two spring telescopic rods are fixedly mounted with a clamping block that can extend to the outside of the mounting groove.

[0019] Further: the support frame includes a base plate installed on one side of the glass liquid container, a vertical stand is fixedly installed on the base plate, a sliding seat is slidably installed on the stand in the vertical direction, a driving member for driving the sliding seat to slide is installed on the stand, four horizontal telescopic rods are symmetrically fixedly installed on one side of the sliding seat, the telescopic ends of the two telescopic rods four are fixedly installed with a cross plate, a driving rod five connected to the cross plate is fixedly installed on the sliding seat, the measuring rod moves vertically through the cross plate, and the fixed block, telescopic rod two and driving rod three are all fixedly installed on the bottom of the cross plate.

[0020] Furthermore: the driving member includes a threaded rod that is vertically and rotatably mounted on the stand, the threaded rod is threadedly connected to the sliding seat, and a motor is fixedly mounted on the top of the stand for driving the threaded rod to rotate;

[0021] The driving assembly includes an outer gear ring coaxially fixed to the annular rotating plate, a second motor is fixedly mounted on the annular mounting plate, and an output shaft of the second motor is coaxially fixed to a gear meshing with the outer gear ring.

[0022] A measuring method for a liquid level measuring device for producing liquid crystal glass substrates, the measuring method comprising the following steps:

[0023] S1: Fix the bottom plate to one side of the glass liquid container and place the measuring rod directly above the through hole;

[0024] S2: Adjust the position of the measuring rod so that the detection float is close to the liquid surface in the glass liquid container but does not touch it;

[0025] S3: Slide the measuring rod downward so that the detection float contacts the glass liquid surface and floats on the liquid surface, so that the position of the scale line on the measuring rod that is flush with the bottom of the horizontal plate changes, and the laser rangefinder is controlled to work. The laser rangefinder emits laser, measures the distance between the laser rangefinder and the bottom of the measuring plate, and records it;

[0026] S4: Control the laser rangefinder to keep emitting laser, measure the distance between the laser rangefinder and the bottom of the measuring plate, measure the sliding distance of the measuring rod on the horizontal plate, and measure the liquid level height in the glass liquid container.

[0027] The present invention provides a liquid level measuring device and method for liquid crystal glass substrate production. Compared with the prior art, it has the following advantages:

[0028] 1. Through the design of the telescopic mechanism, cleaning mechanism, and limiting mechanism, the telescopic mechanism extends the cleaning mechanism into the interior of the glass liquid container, allowing the cleaning mechanism to contact the bottom of the outer wall of the detection float. At this time, the limiting mechanism restricts the measuring rod from sliding upward on the support frame, and the cleaning mechanism can scrape and clean the bottom of the outer wall of the detection float. This effectively prevents the detection float from being attached to the surface of the detection float during long-term monitoring of the glass liquid level, resulting in changes in the detection float's own weight and thus changes in the detection float's buoyancy, thereby improving the detection accuracy of the glass liquid level.

[0029] 2. A connecting base including a base, a spring telescopic rod (1), a contact plate, and a pressure sensor (1) is provided. During the scraping and cleaning of the bottom of the outer wall of the detection float by the cleaning mechanism, when the liquid level in the glass liquid container rises, the PLC control system controls the driving rod (3) to move the connecting base upward along the telescopic rod (2) without contacting the limit frame, thereby removing the restriction on the upward sliding of the measuring rod on the support frame. This does not affect the cleaning of the attachments at the bottom of the outer wall of the detection float. The detection float rises with the rising glass liquid level, thereby improving detection accuracy.

[0030] 3. By designing an auxiliary measuring assembly, when the cleaning mechanism is used to scrape and clean the attachments at the bottom of the outer wall of the detection float, when the liquid level in the glass liquid container drops, the PLC control system controls the drive rod to cause the connecting plate to move downward along the two telescopic rods, driving the arc-shaped scraper to move downward without contacting the bottom of the detection float. At this time, the measuring rod can be moved downward on the support frame under the action of the gravity of the detection float. This does not affect the cleaning of the attachments at the bottom of the outer wall of the detection float. The detection float drops as the glass liquid level drops, further improving detection accuracy.

[0031] 4. By setting the detection float to be detachably installed at the bottom of the measuring rod, when the detection float needs to be replaced, the two sets of clamping mechanisms between the fixing seat and the two limit frames are cancelled, and the positioning between the fixing seat and the two limit frames can be adjusted, thereby realizing the disassembly effect of the detection float, which is convenient for disassembly and replacement of the detection float. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 Shows a schematic diagram of the working state structure of the present invention;

[0034] Figure 2 A schematic diagram of the installation structure of the laser rangefinder of the present invention is shown;

[0035] Figure 3 A schematic diagram of the installation structure of the limiting mechanism of the present invention is shown;

[0036] Figure 4 A schematic diagram of the installation structure of the cleaning mechanism of the present invention is shown;

[0037] Figure 5 A schematic diagram of the installation structure of the auxiliary measurement component of the present invention is shown;

[0038] Figure 6 The present invention shows Figure 5 Enlarged view of point A in the middle;

[0039] Figure 7 Shows a schematic diagram of the installation structure of the detection float of the present invention;

[0040] Figure 8 A schematic diagram of the installation structure of the clamping mechanism of the present invention is shown;

[0041] Figure 9 Shows a schematic structural diagram of the connecting base of the present invention;

[0042] As shown in the figure: 1. Glass liquid container; 11. Through hole; 2. Support frame; 21. Bottom plate; 22. Stand; 23. Sliding seat; 24. Driving member; 241. Threaded rod; 242. Motor 1; 25. Telescopic rod 4; 26. Horizontal plate; 27. Driving rod 5; 3. Measuring rod; 31. Detection float; 311. Fixed seat; 32. Laser rangefinder; 33. Measuring plate; 34. Telescopic mechanism; 341. Fixed block; 342. Telescopic rod 1; 343. Connecting plate; 344. Driving rod 1; 35. Connecting column; 36. Limiting frame; 361. Perforation; 4. Cleaning mechanism; 41. Annular mounting plate; 42. Annular rotating plate; 43. Driving assembly ;431. Outer gear ring;432. Motor 2;433. Gear;44. Connecting frame;45. Rotating plate;46. Arc scraper;47. Drive rod 2;5. Limiting mechanism;51. Telescopic rod 2;52. Connecting seat;521. Base;522. Spring telescopic rod 1;523. Contact plate;524. Pressure sensor 1;53. Drive rod 3;6. Auxiliary measuring component;61. Fixed frame;62. Telescopic rod 3;63. Mounting seat;64. Measuring float;65. Drive rod 4;66. Fixed plate;67. Pressure sensor 2;7. Clamping mechanism;71. Clamping block;711. Mounting slot;72. Spring telescopic rod 2;73. Clamping block. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] Example 1

[0045] Combine Figures 1-9 As shown, the present invention provides a liquid crystal glass substrate liquid level measuring device for production, comprising a support frame 2 for installation on one side of a glass liquid container 1. The top of the glass liquid container 1 is provided with a through hole 11 communicating with the interior thereof, and one end of the support frame 2 extends above the through hole 11.

[0046] The end of the support frame 2 is located directly above the through hole 11 and is vertically movable and penetrates a measuring rod 3 that can be extended into the glass liquid container 1. A scale line is provided on one side of the measuring rod 3. The bottom of the measuring rod 3 extends into the glass liquid container 1 and is installed with a detection float 31. A laser rangefinder 32 is fixedly installed on the top of the support frame 2 and on one side of the measuring rod 3. The laser rangefinder 32 is connected to a PLC control system. A measuring plate 33 is fixedly installed on the top of the measuring rod 3, and one side of the measuring plate 33 extends above the laser rangefinder 32.

[0047] A telescopic mechanism 34 is installed on the support frame 2 and on one side of the measuring rod 3. The telescopic rod of the telescopic mechanism 34 can pass through the through hole 11 and extend into the glass liquid container 1, and a connecting column 35 is installed at the telescopic end of the telescopic mechanism 34. A cleaning mechanism 4 acting on the detection float 31 is installed on the connecting column 35, which is used to scrape and clean the bottom position of the outer wall of the detection float 31. A limiting mechanism 5 acting on the measuring rod 3 is installed on the support frame 2, which is used to limit the measuring rod 3 from sliding upward on the support frame 2. The telescopic mechanism 34, the cleaning mechanism 4 and the limiting mechanism 5 are all communicatively connected to the PLC control system.

[0048] When installing the device, the support frame 2 is installed on one side of the glass liquid container 1 so that the measuring rod 3 is located above the through hole 11. A force is applied to the measuring rod 3 to make it slide downward on the support frame 2, so that the detection float 31 approaches the liquid level in the glass liquid container 1. The measuring rod 3 is then slid downward so that the detection float 31 contacts the glass liquid surface and floats on the liquid surface. The laser rangefinder 32 is controlled to work, and the laser rangefinder 32 emits a laser to measure and record the distance between the laser rangefinder 32 and the bottom of the measuring plate 33. When the liquid level in the glass liquid container 1 changes, the measuring rod 3 slides on the horizontal plate 26, causing the height position of the measuring plate 33 to change, and the distance between the laser rangefinder 32 and the bottom of the measuring plate 33 changes. , thereby realizing the real-time detection effect of the liquid level height in the glass liquid container 1; through the design of the telescopic mechanism 34, the cleaning mechanism 4 and the limiting mechanism 5, the telescopic mechanism 34 is used to extend the cleaning mechanism 4 into the glass liquid container 1, so that the cleaning mechanism 4 contacts the bottom position of the outer side wall of the detection float 31. At this time, the limiting mechanism 5 limits the measuring rod 3 from sliding upward on the support frame 2, and the cleaning mechanism 4 can scrape and clean the bottom position of the outer side wall of the detection float 31, thereby effectively avoiding the situation in which the detection float 31 is attached with attachments during the long-term monitoring of the glass liquid level, resulting in a change in the weight of the detection float 31 itself, thereby causing a change in the buoyancy of the detection float 31, thereby improving the detection accuracy of the glass liquid level.

[0049] A measuring method for a liquid level measuring device for producing liquid crystal glass substrates, the measuring method comprising the following steps:

[0050] S1: Fix the bottom plate 21 to one side of the glass liquid container 1, and make the measuring rod 3 be located directly above the through hole 11;

[0051] S2: Adjust the position of the measuring rod 3 so that the detection float 31 is close to the liquid surface in the glass liquid container 1 but does not touch it;

[0052] S3: The measuring rod 3 is slid downward so that the detection float 31 contacts the surface of the glass liquid and floats on the surface. This causes the position of the scale line on the measuring rod 3 that is flush with the bottom of the horizontal plate 26 to change. The laser rangefinder 32 is controlled to operate. The laser rangefinder 32 emits a laser to measure and record the distance between the laser rangefinder 32 and the bottom of the measuring plate 33.

[0053] S4: Control the laser rangefinder 32 to keep emitting laser, measure the distance between the laser rangefinder 32 and the bottom of the measuring plate 33, measure the sliding distance of the measuring rod 3 on the horizontal plate 26, and measure the liquid level height in the glass liquid container 1.

[0054] In this embodiment, the telescopic mechanism 34 includes a fixed block 341 fixedly mounted on the bottom of the support frame 2 and located on one side of the measuring rod 3, and a vertical telescopic rod 342 is symmetrically fixed to the bottom of the fixed block 341, and the bottoms of the two telescopic rods 342 are fixedly connected with a connecting plate 343, and a driving rod 344 fixedly mounted on the bottom of the fixed block 341 and fixedly connected to the connecting plate 343, and a connecting column 35 is fixedly mounted on the bottom of the connecting plate 343. When in use, the connecting plate 343 is displaced closer to or away from the fixed block 341 along the two telescopic rods 342 through the driving rod 344, thereby driving the connecting column 35 to move, thereby driving the cleaning mechanism 4 to move to the outside or inside of the glass liquid container 1 through the through hole 11.

[0055] In this embodiment, the cleaning mechanism 4 includes an annular mounting plate 41 fixedly mounted on the bottom of the connecting column 35, and the detection float 31 can movably pass through the inner side of the annular mounting plate 41. Specifically, when the measuring rod 3 and the detection float 31 are installed, the measuring rod 3 and the detection float 31 are both vertically passed through the inner side of the annular mounting plate 41, and an annular rotating plate 42 is rotatably mounted on the bottom of the annular mounting plate 41. A driving assembly 43 for driving the annular rotating plate 42 is mounted on the annular mounting plate 41. A connecting frame 44 is fixedly mounted on the bottom of the annular rotating plate 42 and located on one side of the detection float 31. A rotating plate 45 is rotatably mounted on the bottom of the connecting frame 44. An arc-shaped scraper 46 is mounted on one end of the rotating plate 45 close to the detection float 31. The inner concave surface of the arc-shaped scraper 46 can fit into the bottom position of the outer side wall of the detection float 31. Specifically, when the rotating plate 45 is horizontal, the inner concave surface of the arc-shaped scraper 46 fits into the outer side wall of the detection float 31. The bottom position of the side wall is in contact with each other, and the side of the connecting frame 44 away from the detection float 31 is hinged with a driving rod 2 47 for driving the rotating plate 45 to rotate. When scraping and cleaning the attachments at the bottom position of the outer wall of the detection float 31, the connecting plate 343 is moved into the glass liquid container 1 along the two telescopic rods 1 342 by driving rod 1 344, and the connecting column 35 can be driven to move into the glass liquid container 1. At this time, the annular mounting plate 41 is displaced outside the measuring rod 3 toward the detection float 31. At this time, the rotating plate 45 is rotated horizontally at the bottom of the connecting frame 44 by driving rod 2 47, and the inner concave surface of the arc scraper 46 is in contact with the bottom position of the outer wall of the detection float 31. At this time, the annular rotating plate 42 is rotated at the bottom of the annular mounting plate 41 by the driving component 43, so that the arc scraper 46 is driven to rotate around the annular mounting plate 41 by the connecting frame 44, thereby achieving the effect of scraping and cleaning the attachments at the bottom position of the outer wall of the detection float 31.

[0056] Example 2

[0057] like Figures 1-9 As shown, based on the above embodiment, this embodiment further provides the following content:

[0058] In this embodiment, the limiting mechanism 5 includes a telescopic rod 2 51, a connecting seat 52 and a driving rod 3 53. The bottom of the support frame 2 and on both sides of the measuring rod 3 are fixedly installed with a vertical telescopic rod 2 51, the bottom of the telescopic rod 2 51 is fixedly installed with a connecting seat 52, and the bottom of the support frame 2 is fixedly installed with a driving rod 3 53 fixedly connected to the connecting seat 52. The bottom positions on both sides of the measuring rod 3 and below the connecting seat 52 are integrally formed with a limiting frame 36. During use, when it is necessary to limit the measuring rod 3 from sliding upward on the support frame 2, the connecting seat 52 is displaced along the telescopic rod 2 51 away from the support frame 2 through the driving rod 3 53, so that the connecting seat 52 contacts the limiting frame 36, thereby limiting the position of the limiting frame 36, and limiting the measuring rod 3 from sliding upward on the support frame 2, which is convenient for control.

[0059] In this embodiment, the connecting seat 52 includes a base 521 fixedly connected to the telescopic rod 2 51 and the driving rod 3 53, a spring telescopic rod 1 522 is symmetrically fixedly installed on the bottom of the base 521, and a contact plate 523 is fixedly installed on the bottom of the two spring telescopic rods 1 522, and a pressure sensor 1 524 in contact with the contact plate 523 is fixedly installed on the bottom of the base 521 and located between the two spring telescopic rods 1 522. The pressure sensor 1 524 is communicatively connected to the PLC control system. By setting the connecting seat 52 including the base 521, the spring telescopic rod 1 522, the contact plate 523 and the pressure sensor 1 524, when the measuring rod 3 is restricted from sliding upward on the support frame 2 by the restriction mechanism 5, when the liquid in the glass liquid container 1 When the surface rises, the detection float 31 rises, and the measuring rod 3 with it slides upward on the support frame 2, causing the two limit frames 36 to move upward. The two contact plates 523 apply a resisting force to the two pressure sensors 524 respectively. The force detection signals of the two pressure sensors 524 change, and the detection signals are fed back to the PLC control system. At this time, the PLC control system controls the driving rod 3 53 to make the connecting seat 52 move upward along the telescopic rod 2 51 without contacting the limit frame 36, thereby canceling the restriction on the measuring rod 3 sliding upward on the support frame 2, and does not affect the cleaning of the attachments at the bottom position of the outer wall of the detection float 31, and the detection float 31 floats up with the rising glass liquid level, thereby improving the detection accuracy.

[0060] In this embodiment, an auxiliary measuring assembly 6 is installed on the connecting plate 343 and on the side of the connecting frame 44 away from the detection float 31. The auxiliary measuring assembly 6 includes a fixing frame 61 fixedly installed on the top of the connecting plate 343 and away from the side of the measuring rod 3. A vertical telescopic rod 3 62 is fixedly installed on the fixing frame 61 and located on the outside of the connecting plate 343. A mounting seat 63 is fixedly installed at the bottom of the telescopic rod 3 62. A measuring float 64 is fixedly installed at the bottom of the mounting seat 63. A vertical telescopic rod 3 62 is fixedly installed at the bottom of the fixing frame 61. The driving rod 4 65, the piston rod of the driving rod 4 65 is fixedly installed with a fixing plate 66, and the bottom of the fixing plate 66 is fixedly installed with a pressure sensor 2 67 that can contact the mounting seat 63. The pressure sensor 2 67 and the driving rod 4 65 are both connected to the PLC control system for communication. By setting the design of the auxiliary measurement component 6, when the cleaning mechanism 4 is used to scrape and clean the attachments at the bottom position of the outer wall of the detection float 31, the connecting plate 343 is moved into the glass liquid container 1 by the driving rod 1 344, and the fixing frame 61 is driven to move to the glass liquid container 1. In the liquid container 1, under the action of the gravity of the measuring float 64, the mounting seat 63 is driven to move downward along the telescopic rod 3 62, so that the measuring float 64 contacts the glass liquid surface, and then the fixing plate 66 is moved downward by the driving rod 4 65, driving the pressure sensor 2 67 to move downward and conflict with the mounting seat 63. When the liquid level in the glass liquid container 1 drops, under the action of the gravity of the measuring float 64, the mounting seat 63 is driven to move downward along the telescopic rod 3 62, so that the pressure sensor 2 67 is no longer in contact with the mounting seat 63, and the pressure sensor 2 67 detects the liquid level. The detection signal changes and the detection signal is fed back to the PLC control system. At this time, the driving rod 344 is controlled by the PLC control system to make the connecting plate 343 move downward along the two telescopic rods 342, driving the arc scraper 46 to move downward without contacting the bottom of the detection float 31. At this time, the measuring rod 3 can be moved downward on the support frame 2 under the action of the gravity of the detection float 31, without affecting the cleaning of the attachments at the bottom position of the outer wall of the detection float 31. The detection float 31 drops as the glass liquid level drops, further improving the detection accuracy.

[0061] Example 3

[0062] like Figures 1-9 As shown, based on the above embodiment, this embodiment further provides the following content:

[0063] In this embodiment, the detection float 31 is detachably mounted on the bottom of the measuring rod 3, and a fixing seat 311 is integrally formed on the top of the detection float 31. A clamping mechanism 7 is symmetrically mounted on the fixing seat 311. The fixing seat 311 is clamped with the two limiting frames 36 by two sets of clamping mechanisms 7. By setting the detection float 31 to be detachably mounted on the bottom of the measuring rod 3, when the detection float 31 needs to be replaced, the clamping between the fixing seat 311 and the two limiting frames 36 by the two sets of clamping mechanisms 7 is canceled, and the positioning between the fixing seat 311 and the two limiting frames 36 can be corrected, thereby achieving the disassembly effect of the detection float 31, and facilitating the disassembly and replacement of the detection float 31.

[0064] The shown clamping mechanism 7 includes a clamping block 71 fixedly mounted on the top of the fixing seat 311, a through-hole 361 is provided at the bottom of the limiting frame 36, and the two clamping blocks 71 can respectively movably pass through the two through-holes 361, and mounting grooves 711 are symmetrically provided on both sides of the clamping block 71. When the fixing seat 311 is in contact with the bottom of the limiting frame 36, the inner bottom wall of the mounting groove 711 is flush with the inner bottom wall of the limiting frame 36, and a spring telescopic rod 2 72 is symmetrically fixedly mounted on the clamping block 71 and located in the mounting groove 711. The two spring telescopic rods 2 72 are fixedly mounted with a clamping block 73 that can extend to the outside of the mounting groove 711. When in use, when the fixing seat 311 and the two limiting frames 36 are clamped and fixed, the two clamping blocks 71 are respectively inserted into the through-holes 361 on the two limiting frames 36, and a force is applied to the two clamping blocks 71, so that the two clamping blocks 73 are respectively moved along the spring telescopic rod 2 7 When the locking cam 72 is unlocked, the locking cam 72 is unlocked and the locking cam 72 is unlocked, so that the two locking cams 72 can be unlocked when the locking cam 72 is unlocked.

[0065] In this embodiment, the support frame 2 includes a bottom plate 21 mounted on one side of the glass liquid container 1, a vertical stand 22 is fixedly mounted on the bottom plate 21, a sliding seat 23 is slidably mounted on the stand 22 in the vertical direction, a driving member 24 for driving the sliding seat 23 to slide is mounted on the stand 22, a horizontal telescopic rod four 25 is symmetrically fixedly mounted on one side of the sliding seat 23, a cross plate 26 is fixedly mounted on the telescopic ends of the two telescopic rods four 25, a driving rod five 27 connected to the cross plate 26 is fixedly mounted on the sliding seat 23, the measuring rod 3 is movable in the vertical direction and passes through the cross plate 26, and the fixed block 341, the telescopic rod two 51 and The driving rods 3 53 are all fixedly installed at the bottom of the horizontal plate 26. The support frame 2 includes a vertical frame 22, a sliding seat 23, a driving member 24, and a horizontal plate 26. During use, when it is necessary to perform maintenance work on the various components installed on the horizontal plate 26, the sliding seat 23 is made to slide on the vertical frame 22 through the driving member 24, and then the horizontal plate 26 is made to slide along the two telescopic rods 4 25 through the driving rod 3 53, so that the horizontal plate 26 can be located on the side of the glass liquid container 1 close to the bottom plate 21, and then the sliding seat 23 is made to slide downward on the vertical frame 22 through the driving member 24, thereby lowering the height position of the horizontal plate 26, thereby facilitating the maintenance work of the staff.

[0066] In this embodiment, the driving member 24 includes a threaded rod 241 that is vertically and rotatably mounted on the stand 22. The threaded rod 241 is threadedly connected to the sliding seat 23. A motor 242 is fixedly mounted on the top of the stand 22 for driving the threaded rod 241 to rotate. When in use, the motor 242 is controlled to be turned on, and the motor 242 drives the threaded rod 241 to rotate on the stand 22, thereby driving the sliding seat 23 to slide on the stand 22, which is convenient for control.

[0067] The driving assembly 43 includes an outer gear ring 431 coaxially fixed to the annular rotating plate 42, and a second motor 432 is fixedly mounted on the annular mounting plate 41. The output shaft of the second motor 432 is coaxially fixed to a gear 433 meshing with the outer gear ring 431. When in use, the second motor 432 is controlled to be turned on, and the output shaft of the second motor 432 rotates to drive the gear 433 to rotate, thereby driving the annular rotating plate 42 to rotate at the bottom of the annular mounting plate 41 through the outer gear ring 431, which is convenient for control.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. 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 various embodiments of the present invention.

Claims

1. A liquid level measuring device for liquid crystal glass substrate production, characterized in that: The invention comprises a support frame for being installed on one side of a glass liquid container, wherein a through hole communicating with the interior of the glass liquid container is formed on the top of the glass liquid container, and one end of the support frame extends above the through hole; The end of the support frame is located directly above the through hole and is vertically movable and extends through a measuring rod that can be extended into the glass liquid container. A scale line is provided on one side of the measuring rod. The bottom of the measuring rod extends into the glass liquid container and is installed with a detection float. A laser rangefinder is fixedly installed on the top of the support frame and on one side of the measuring rod. A measuring plate is fixedly installed on the top of the measuring rod, and one side of the measuring plate extends above the laser rangefinder. A telescopic mechanism is installed on the support frame and on one side of the measuring rod. The telescopic rod of the telescopic mechanism can pass through the through hole and extend into the glass liquid container, and a connecting column is installed at the telescopic end of the telescopic mechanism. A cleaning mechanism acting on the detection float is installed on the connecting column, which is used to scrape and clean the bottom position of the outer side wall of the detection float. A limiting mechanism acting on the measuring rod is installed on the support frame, which is used to limit the measuring rod from sliding upward on the support frame.

2. The liquid level measuring device for liquid crystal glass substrate production according to claim 1, characterized in that: The telescopic mechanism includes a fixed block fixedly installed at the bottom of the support frame and located on one side of the measuring rod. A vertical telescopic rod is symmetrically fixed to the bottom of the fixed block. The bottoms of the two telescopic rods are fixedly connected to a connecting plate. A driving rod is fixedly installed at the bottom of the fixed block and is fixedly connected to the connecting plate. The connecting column is fixedly installed at the bottom of the connecting plate.

3. The liquid level measuring device for producing liquid crystal glass substrates according to claim 2, characterized in that: The cleaning mechanism includes an annular mounting plate fixedly mounted on the bottom of the connecting column, the detection float can movably pass through the inner side of the annular mounting plate, an annular rotating plate is rotatably mounted on the bottom of the annular mounting plate, a driving assembly for driving the annular rotating plate is mounted on the annular mounting plate, a connecting frame is fixedly mounted on the bottom of the annular rotating plate and on one side of the detection float, a rotating plate is rotatably mounted on the bottom of the connecting frame, an arc-shaped scraper is mounted on the end of the rotating plate close to the detection float, the inner concave surface of the arc-shaped scraper can be fitted with the bottom position of the outer side wall of the detection float, and a driving rod 2 for driving the rotating plate to rotate is hinged on the side of the connecting frame away from the detection float.

4. The liquid level measuring device for producing liquid crystal glass substrates according to claim 3, characterized in that: The limiting mechanism includes a telescopic rod 2, a connecting seat and a driving rod 3. The bottom of the support frame and on both sides of the measuring rod are fixedly installed with a vertical telescopic rod 2, the bottom of the telescopic rod 2 is fixedly installed with a connecting seat, and the bottom of the support frame is fixedly installed with a driving rod 3 fixedly connected to the connecting seat. The bottom positions on both sides of the measuring rod and below the connecting seat are integrally formed with a limiting frame.

5. The liquid level measuring device for producing liquid crystal glass substrates according to claim 4, characterized in that: The connecting seat includes a base fixedly connected to the telescopic rod 2 and the driving rod 3, a spring telescopic rod 1 is symmetrically fixedly installed on the bottom of the base, a contact plate is fixedly installed on the bottom of the two spring telescopic rods 1, and a pressure sensor 1 in contact with the contact plate is fixedly installed on the bottom of the base and located between the two spring telescopic rods 1.

6. The liquid level measuring device for producing liquid crystal glass substrates according to claim 3, characterized in that: An auxiliary measuring assembly is installed on the connecting plate and on the side of the connecting frame away from the detection float. The auxiliary measuring assembly includes a fixing frame fixedly installed on the top of the connecting plate and away from the side of the measuring rod. A vertical telescopic rod three is fixedly installed on the fixing frame and located on the outside of the connecting plate. A mounting seat is fixedly installed at the bottom of the telescopic rod three. A measuring float is fixedly installed at the bottom of the mounting seat. A vertical driving rod four is fixedly installed at the bottom of the fixing frame. The piston rod of the driving rod four is fixedly installed with a fixing plate. A pressure sensor two that can contact the mounting seat is fixedly installed at the bottom of the fixing plate.

7. The liquid level measuring device for producing liquid crystal glass substrates according to claim 4, characterized in that: The detection float is detachably mounted on the bottom of the measuring rod, and a fixing seat is integrally formed on the top of the detection float. A clamping mechanism is symmetrically mounted on the fixing seat, and the fixing seat is clamped with the two limiting frames through two sets of clamping mechanisms. The clamping mechanism includes a clamping block fixedly mounted on the top of the fixing seat, a through-hole is provided at the bottom of the limiting frame, and two clamping blocks can movably pass through the two through-holes respectively. Mounting grooves are symmetrically provided on both sides of the clamping block. When the fixing seat is in contact with the bottom of the limiting frame, the bottom wall of the mounting groove is flush with the bottom wall of the limiting frame. Two spring telescopic rods are symmetrically fixedly mounted on the clamping block and located in the mounting groove. The two spring telescopic rods are fixedly mounted with a clamping block that can extend to the outside of the mounting groove.

8. The liquid level measuring device for producing liquid crystal glass substrates according to claim 4, characterized in that: The support frame includes a base plate installed on one side of the glass liquid container, a vertical stand fixedly installed on the base plate, a sliding seat slidably installed on the stand in the vertical direction, a driving member for driving the sliding seat to slide is installed on the stand, four horizontal telescopic rods are symmetrically fixedly installed on one side of the sliding seat, the telescopic ends of the two telescopic rods four are fixedly installed with a cross plate, a driving rod five connected to the cross plate is fixedly installed on the sliding seat, the measuring rod moves vertically and passes through the cross plate, and the fixed block, the telescopic rod two and the driving rod three are all fixedly installed on the bottom of the cross plate.

9. The liquid level measuring device for producing liquid crystal glass substrates according to claim 8, characterized in that: The driving member includes a threaded rod that is vertically and rotatably mounted on the stand, the threaded rod is threadedly connected to the sliding seat, and a motor is fixedly mounted on the top of the stand for driving the threaded rod to rotate; The driving assembly includes an outer gear ring coaxially fixed to the annular rotating plate, a second motor is fixedly mounted on the annular mounting plate, and an output shaft of the second motor is coaxially fixed to a gear meshing with the outer gear ring.

10. The measuring method of the liquid level measuring device for producing liquid crystal glass substrates according to claim 9, characterized in that: The measuring method comprises the following steps: S1: Fix the bottom plate to one side of the glass liquid container and place the measuring rod directly above the through hole; S2: Adjust the position of the measuring rod so that the detection float is close to the liquid surface in the glass liquid container but does not touch it; S3: Slide the measuring rod downward so that the detection float contacts the glass liquid surface and floats on the liquid surface, so that the position of the scale line on the measuring rod that is flush with the bottom of the horizontal plate changes, and the laser rangefinder is controlled to work. The laser rangefinder emits laser, measures the distance between the laser rangefinder and the bottom of the measuring plate, and records it; S4: Control the laser rangefinder to keep emitting laser, measure the distance between the laser rangefinder and the bottom of the measuring plate, measure the sliding distance of the measuring rod on the horizontal plate, and measure the liquid level height in the glass liquid container.

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