Metering equipment for corrosive liquid

Abstract

The invention discloses corrosive liquid metering equipment, and relates to the field of metering sampling device application, the corrosive liquid metering equipment comprises a box body and a liquid conveying pipeline, a tray is arranged in the box body, a fixing assembly used for fixing a measuring cup is movably installed at the top of the tray, and a lifting table is movably installed at the top of the tray by forming a through groove; the side face of the tray is rotationally connected with a lead screw, one end of the lead screw is connected with a driving assembly, the exterior of the lead screw is in threaded connection with a moving assembly used for driving the fixing assembly to move, and one side of the tray is movably provided with a drip-proof assembly by arranging a sliding frame. The measuring cup is indirectly pushed by the moving assembly to move, so that the situation that an operator makes contact with a dangerous source can be reduced, the moving assembly can drive the drip-proof assembly and the measuring cup to move synchronously, the measuring cup and the collecting disc cover the space where a liquid conveying opening of the liquid conveying pipeline is located, and when the liquid conveying pipeline is aged or residual liquid exists, leaked corrosive liquid can be collected; and corrosive liquid is prevented from corroding and damaging equipment.

Description

Technical Field

[0001] The invention relates to the field of metering sampling devices, in particular to a metering device for corrosive liquids. Background Art

[0002] Corrosive liquids refer to liquids that can damage or destroy the structure of substances (such as metals, skin, tissues, etc.). These liquids have strong chemical reactivity and can react with other substances, causing changes in their physical or chemical properties. Common corrosive liquids include strong acids (such as sulfuric acid, hydrochloric acid, nitric acid) and strong alkalis (such as sodium hydroxide, potassium hydroxide).

[0003] The metering work of corrosive liquids mainly includes flow metering, liquid level metering, pressure metering, temperature metering, quantitative metering, weighing metering and sampling analysis. Different metering work involves different working principles. For example, flow metering usually uses electromagnetic flowmeter to monitor the flow of metered liquid, which is suitable for transporting corrosive liquids in industrial pipelines. Quantitative metering usually uses measuring cylinders, measuring cups and other tools to measure a fixed volume of liquid, which is suitable for small amounts of sampling analysis or experimental purposes. Weighing metering determines the amount of liquid by weighing the mass of the weighing container and the liquid, which is suitable for weight quality inspection in the procurement process.

[0004] In practical applications, such as corrosive liquid transport vehicles or measuring a certain volume of corrosive liquid in experiments, quantitative sampling is involved. The quantitative sampling of corrosive liquids must consider the corrosive characteristics of the corrosive liquids and select appropriate tools and equipment to ensure the safety of personnel and equipment during quantitative sampling. Minimizing touch and preventing liquid splashing during quantitative sampling of corrosive liquids can effectively improve the safety of the measuring work. Summary of the invention

[0005] Based on this, the object of the present invention is to provide a metering device for corrosive liquids to solve the technical problems mentioned in the above background.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a metering device for corrosive liquids, comprising a box body, a liquid infusion pipeline is arranged through the top of the box body, and a tray is arranged inside the box body, and a fixing component for fixing a measuring cup is movably installed on the top of the tray, a lifting platform is movably installed on the top of the tray by opening a through groove, and a telescopic cylinder is arranged at the bottom of the lifting platform, a screw rod is rotatably connected to the side of the tray, and one end of the screw rod is connected to a driving component, and the external thread of the screw rod is connected to a moving component for driving the fixed component to move, and a drip-proof component is movably installed on one side of the tray by setting a sliding frame.

[0007] By adopting the above technical solution, a moving component is set to push the fixed component to move, thereby achieving the purpose of moving the measuring cup. The use of the moving component to indirectly push the measuring cup to move can reduce the operator's contact with dangerous sources and improve the safety of the measuring work. When the moving component pushes the measuring cup to move until it is just docked with the collecting plate, the moving component will drive the anti-drip component as a whole and the measuring cup to move synchronously, so that the measuring cup and the collecting plate cover the space where the infusion port of the infusion pipeline is located. When the infusion pipeline is aging or has liquid dripping after measuring work, the corrosive liquid dripping will be collected by the measuring cup or the collecting plate to prevent the corrosive liquid from causing corrosion damage to the equipment.

[0008] The present invention is further configured as follows: the fixing assembly includes a base, and a first limit block is provided at the bottom of the base, and a protrusion is provided on one side of the base, a plurality of groups of second guide rods are provided inside the base, and the outsides of the plurality of groups of second guide rods are sleeved with fixing blocks and second springs, and the bottoms of the plurality of groups of fixing blocks are provided with fixing rods, a plurality of groups of strip grooves matching the fixing rods are provided at the top of the base, and a movable plate is rotatably connected to the top of the base, and a plurality of groups of arc grooves matching the fixing rods are provided at the top of the movable plate.

[0009] Preferably, a fixing component can be provided to engage a measuring cup, and driving the fixing component to move can drive the measuring cup to move inside the box, so that the operator can place the measuring cup at a certain distance from the infusion pipeline, thereby improving the safety of the measuring work.

[0010] The present invention is further configured such that the tops of the tray and the lifting platform are both provided with a first limiting groove matching the first limiting block.

[0011] Preferably, the first limiting block and the first limiting groove are provided so that the fixing assembly can slide between the tray and the lifting platform.

[0012] The present invention is further configured such that the moving assembly includes a moving seat threadedly connected to the screw rod, and the bottom of the moving seat is provided with an engaging groove matching the protrusion, and the top of the engaging groove is configured as an inclined surface, the bottom of the moving seat is provided with a second limit block, and the side of the moving seat is provided with a pushing block for pushing the anti-drip assembly, and one side of the tray is provided with a second limit groove matching the second limit block.

[0013] Preferably, the movable component is provided to not only push the fixed component to move, but also push the anti-drip component to move, thereby reducing the manual operation of the operator and improving the safety of measuring.

[0014] The present invention is further configured such that the anti-drip assembly includes a shell movably mounted inside the sliding frame, and the bottom of the shell is rotatably connected to a connecting rod, and a collecting plate is provided at the bottom of the connecting rod, and the bottom of the connecting rod is connected to a gear set.

[0015] Preferably, an anti-drip component is provided to collect the corrosive liquid remaining in the infusion pipeline, thereby preventing the corrosive liquid remaining in the infusion pipeline from dripping into the inside of the equipment and causing equipment corrosion. A gear set is provided at the bottom of the connecting rod of the anti-drip component. The gear set has multiple gear assemblies with different parameters for changing the gear ratio, thereby ensuring that the anti-drip component is displaced a shorter distance to enable the collection plate to rotate a certain angle to avoid other equipment.

[0016] The present invention is further configured such that a third guide rod is provided on one side of the shell, and a third spring is sleeved on the outside of the third guide rod, and the third guide rod and the sliding frame are movably interwoven, a rack is provided inside the sliding frame, and the rack and the gear set are meshed with each other, and a semi-arc groove matching the pushing block is provided at one end of the sliding frame.

[0017] Preferably, the anti-drip assembly can be automatically reset by providing a third guide rod and a third spring, and a rack is provided to drive the gear train to work.

[0018] The present invention is further configured such that an outer convex ring is provided on the outside of the infusion pipeline, and a splash-proof cover is provided on the outside of the infusion pipeline, a plurality of groups of first guide rods are provided on the top of the splash-proof cover, and a first spring is provided on the outside of the plurality of groups of first guide rods, and the plurality of groups of first guide rods and the outer convex ring are movably penetrated, and an inclined exhaust hole is provided on the bottom of the splash-proof cover.

[0019] Preferably, by providing a splash-proof cover plate to fit the measuring cup, the splashing of the corrosive liquid can be reduced, and the splash-proof cover plate is provided with inclined exhaust holes, which can also prevent the corrosive liquid from splashing from the inclined exhaust holes.

[0020] The present invention is further configured such that a distance sensor for measuring the distance between the outer convex ring and the splash-proof cover is provided at the bottom of the outer convex ring, and an electromagnetic valve is provided on the side of the infusion pipeline.

[0021] Preferably, a distance sensor is provided to monitor the distance between the outer convex ring and the splash-proof cover plate, and the distance is used as electrical signal data to control the extension and retraction of the telescopic cylinder, thereby achieving the purpose of quantitative measurement.

[0022] The present invention is further configured such that the splash-proof cover plate and the collecting tray are both made of corrosion-resistant materials.

[0023] Preferably, the splash-proof cover and the collection tray are made of corrosion-resistant materials to avoid damage to the equipment, and an openable door is provided on the side of the box body to facilitate maintenance of the equipment and regular maintenance and cleaning of the collection tray.

[0024] In summary, the present invention mainly has the following beneficial effects: The present invention can reduce the splashing of corrosive liquid by arranging a movable and retractable splash-proof cover plate on the outside of the infusion pipeline. The measuring cup is movably installed in the tray by using a fixed component. The fixed component drives the measuring cup to move from the station where the measuring cup is placed to the station for quantitative liquid sampling, so that the operator is still a certain distance away from the danger source when taking the measuring cup, thereby improving the safety of quantitative sampling. When quantitatively measuring the corrosive liquid, the telescopic cylinder pushes the measuring cup to rise so that the infusion pipeline passes through the bottom of the measuring cup. At this time, since the bottom of the measuring cup and the infusion port of the infusion pipeline are close, the splashing of the liquid can be effectively reduced, and the top of the measuring cup is blocked by the splash-proof cover plate, which can further prevent the splashing of the corrosive liquid when measuring, thereby improving the safety of the corrosive liquid when measuring.

[0025] The present invention achieves the purpose of moving the measuring cup by arranging a moving component to push the fixed component to move. The use of the moving component to indirectly push the measuring cup to move can reduce the operator's contact with dangerous sources and improve the safety of the measuring work. When the moving component pushes the measuring cup to move until it is just docked with the collecting plate, the moving component will drive the anti-drip component as a whole and the measuring cup to move synchronously, so that the measuring cup and the collecting plate cover the space where the infusion port of the infusion pipeline is located. When the infusion pipeline is aged or has liquid dripping after measuring work, the corrosive liquid dripping will be collected by the measuring cup or the collecting plate to prevent the corrosive liquid from causing corrosion damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the box of the present invention; Figure 3 It is a schematic diagram of the installation of the infusion pipeline, the outer convex ring, the splash-proof cover plate and the distance sensor of the present invention; Figure 4 A schematic diagram of the distribution of the splash-proof cover plate and the inclined exhaust holes of the present invention; Figure 5 It is a schematic diagram of the distribution of the tray, the fixing assembly, the lifting platform and the anti-drip assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the fixing assembly of the present invention; Figure 7 It is a schematic diagram of the internal structure of the fixing assembly of the present invention; Figure 8 It is a schematic diagram of the structure of the mobile component of the present invention; Fig. 9 It is a schematic diagram of the internal structure of the anti-drip assembly of the present invention; Fig.10 It is a schematic diagram of the housing of the movable component of the present invention being attached to the anti-drip component; Fig.11 This is a schematic diagram of the measuring cup of the present invention being moved to be flush with the side of the infusion pipeline; Fig.12 This is a schematic diagram showing that the collecting plate has completed its rotation when the measuring cup of the present invention moves to just below the infusion pipeline.

[0027] Description of reference numerals: 1. Box; 2. Infusion pipeline; 3. External convex ring; 4. Splash-proof cover; 5. First guide rod; 6. First spring; 7. Inclined exhaust hole; 8. Solenoid valve; 9. Distance sensor; 10. Tray; 11. Lifting platform; 12. Telescopic cylinder; 13. First limit groove; 14. Fixing assembly; 1401. Base; 1402. First limit block; 1403. Convex block; 1404. Second guide rod; 1405. Fixing block; 1406. Second spring; 1407. Fixing rod; 1408. Strip groove; 140 9. movable plate; 1410. arc groove; 15. screw rod; 16. driving assembly; 17. moving assembly; 1701. moving seat; 1702. fitting groove; 1703. inclined plane; 1704. second limit block; 1705. pushing block; 18. second limit groove; 19. sliding frame; 20. anti-drip assembly; 2001. shell; 2002. connecting rod; 2003. collecting plate; 2004. gear set; 21. third guide rod; 22. third spring; 23. rack; 24. semi-arc groove; 25. hatch. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] The following describes an embodiment of the present invention based on its overall structure.

[0030] See also Figure 1 - Fig.12A corrosive liquid metering device includes a box body 1, a liquid infusion pipeline 2 is provided through the top of the box body 1, the liquid infusion pipeline 2 extends to the inside of the box body 1, and a tray 10 is provided inside the box body 1, and a fixing component 14 for fixing a measuring cup is movably installed on the top of the tray 10, and the fixing component 14 can be located at the bottom of the tray 10 and slide, and a lifting platform 11 is movably installed on the top of the tray 10 through a through groove, and a telescopic cylinder 12 is provided at the bottom of the lifting platform 11, and a screw rod 15 is rotatably connected to the side of the tray 10, and the screw rod 15 One end of the tray 10 is connected to a driving component 16, and the external thread of the screw rod 15 is connected to a moving component 17 for driving the fixed component 14 to move. The driving component 16 drives the screw rod 15 to rotate, thereby driving the moving component 17 to move. The movement of the moving component 17 can drive the fixed component 14 to slide between the tray 10 and the lifting platform 11. The lifting platform 11 is located directly below the infusion pipeline 2. A sliding frame 19 is provided on one side of the tray 10 to movably install an anti-drip component 20. The anti-drip component 20 can collect the residual corrosive liquid in the infusion pipeline 2.

[0031] In the above embodiments, please refer to Figure 6 - Figure 7 The fixing assembly 14 includes a base 1401, and a first limiting block 1402 is provided at the bottom of the base 1401, and a protrusion 1403 is provided on one side of the base 1401, and multiple groups of second guide rods 1404 are provided inside the base 1401, and the outer parts of the multiple groups of second guide rods 1404 are sleeved with fixing blocks 1405 and second springs 1406, and the tops of the multiple groups of fixing blocks 1405 are provided with fixing rods 1407, and multiple groups of strip grooves 1408 matching the fixing rods 1407 are provided on the top of the base 1401, and a movable plate 1409 is rotatably connected to the top of the base 1401, and multiple groups of arc grooves 1410 matching the fixing rods 1407 are provided at the bottom of the movable plate 1409, and the fixing assembly 14 can be used to engage the measuring cup, and then driving the fixing assembly 14 to move can drive the measuring cup to move into the box body 1, so that the operator has a certain safety distance from the infusion pipeline 2 when placing the measuring cup, thereby improving the safety of the measuring work.

[0032] In the above embodiments, please refer to Figure 5 The tops of the tray 10 and the lifting platform 11 are both provided with a first limiting groove 13 that matches the first limiting block 1402 . By setting the first limiting block 1402 and the first limiting groove 13 , the fixing component 14 can slide between the tray 10 and the lifting platform 11 .

[0033] In the above embodiments, please refer to Figure 8The moving assembly 17 includes a moving seat 1701 threadedly connected to the screw rod 15, and the bottom of the moving seat 1701 is provided with an engaging groove 1702 matching the protrusion 1403, and the top of the engaging groove 1702 is set as an inclined surface 1703, and the bottom of the moving seat 1701 is provided with a second limiting block 1704, and the side of the moving seat 1701 is provided with a pushing block 1705 for pushing the anti-drip assembly 20, and one side of the tray 10 is provided with a second limiting groove 18 matching the second limiting block 1704. By setting the moving assembly 17, not only the fixed assembly 14 can be pushed to move, but also the anti-drip assembly 20 can be pushed to move, thereby reducing the manual operation of the operator and improving the safety of measuring.

[0034] In the above embodiments, please refer to Fig. 9 The anti-drip component 20 includes a shell 2001 movably installed inside the sliding frame 19, and the bottom of the shell 2001 is rotatably connected to a connecting rod 2002, and a collecting plate 2003 is arranged at the bottom of the connecting rod 2002, and a gear set 2004 is connected to the bottom of the connecting rod 2002. By setting the anti-drip component 20, the corrosive liquid remaining in the infusion pipeline 2 can be collected to prevent the corrosive liquid remaining in the infusion pipeline 2 from dripping into the interior of the equipment and causing equipment corrosion. The gear set 2004 is arranged at the bottom of the connecting rod 2002 of the anti-drip component 20. The gear set 2004 is composed of a plurality of gears with different parameters, which is used to change the gear ratio to ensure that the anti-drip component 20 moves a shorter distance to realize the collection plate 2003 rotating a certain angle to avoid other equipment.

[0035] In the above embodiments, please refer to Figure 5 A third guide rod 21 is provided on one side of the shell 2001, and a third spring 22 is sleeved on the outside of the third guide rod 21, and the third guide rod 21 and the sliding frame 19 are movably arranged to penetrate each other, a rack 23 is provided inside the sliding frame 19, and the rack 23 and the gear set 2004 are meshed with each other, and a semi-arc groove 24 matching the pushing block 1705 is provided at one end of the sliding frame 19. The anti-drip assembly 20 can be automatically reset by arranging the third guide rod 21 and the third spring 22, and the rack 23 is provided to drive the gear set 2004 to rotate.

[0036] In the above embodiments, please refer to Figure 2 and Figure 3An outer convex ring 3 is provided on the outside of the infusion pipeline 2, and a splash-proof cover 4 is sleeved on the outside of the infusion pipeline 2. A plurality of groups of first guide rods 5 are provided on the top of the splash-proof cover 4, and a first spring 6 is sleeved on the outside of the plurality of groups of first guide rods 5, and the plurality of groups of first guide rods 5 and the outer convex ring 3 are movably penetrated, and an inclined exhaust hole 7 is provided on the bottom of the splash-proof cover 4. By arranging the splash-proof cover 4 to fit the measuring cup, the splashing of corrosive liquid can be reduced, and the splash-proof cover 4 is provided with the inclined exhaust hole 7, which can also prevent the corrosive liquid from splashing from the inclined exhaust hole 7.

[0037] In the above embodiments, please refer to Figure 3 A distance sensor 9 for measuring the distance between the outer convex ring 3 and the splash-proof cover 4 is provided at the bottom of the outer convex ring 3, and an electromagnetic valve 8 is provided on the side of the infusion pipeline 2. The distance sensor 9 is set to monitor the distance between the outer convex ring 3 and the splash-proof cover 4, and the distance is used as electrical signal data to control the telescopic formation of the telescopic cylinder 12, thereby achieving the purpose of quantitative measurement.

[0038] In the above embodiments, please refer to Figure 1 The splash-proof cover plate 4 and the collection tray 2003 are both made of corrosion-resistant materials. By using corrosion-resistant materials to make the splash-proof cover plate 4 and the collection tray 2003, damage to the equipment can be avoided. An openable hatch 25 is provided on the side of the box body 1 to facilitate maintenance of the equipment and regular maintenance and cleaning of the collection tray 2003.

[0039] When the present invention is in specific operation: first, the operator takes a suitable measuring cup, rotates the movable plate 1409, and uses the multiple groups of arc grooves 1410 on the top of the movable plate 1409 to squeeze the multiple groups of fixed rods 1407, so that the fixed rods 1407 slide along the strip grooves 1408, thereby causing the multiple groups of fixed blocks 1405 to compress the second springs 1406 and shrink them into the inside of the base 1401, and then the measuring cup is snapped into the fixed assembly 14, and the movable plate 1409 is released. Under the resetting action of the multiple groups of second springs 1406, the fixed blocks 1405 are reset to limit and fix the measuring cup.

[0040] Then, according to the volume to be measured, press the button for the specified volume, such as 10ML, 15ML or 30ML, and then press the start button. The control program in the device starts the driving component 16 to drive the screw rod 15 to rotate, and then the moving component 17 moves along the screw rod 15 and pushes the fixed component 14 to move. The fixed component 14 will drive the measuring cup into the interior of the box body 1. When the pushing block 1705 of the moving component 17 moves to the semi-arc groove 24 and the shell 2001 of the anti-drip component 20 is attached, the movement of the moving component 17 will not only drive The movement of the fixed component 14 will also push the anti-drip component 20 to move synchronously. When the pushing block 1705 of the moving component 17 is in contact with the shell 2001, the edge of the measuring cup passes over the edge of the collecting plate 2003 for a distance, and then the measuring cup and the collecting plate 2003 are synchronously moved to the bottom of the infusion pipe 2. As the collecting plate 2003 gradually moves away from directly below the infusion pipe 2, since the edge of the measuring cup and the edge of the collecting plate 2003 overlap for a short distance, both the measuring cup and the collecting plate 2003 can cover the space where the infusion pipe 2 is located.

[0041] As the measuring cup and the anti-drip assembly 20 continue to move, when the measuring cup is moved to the bottom of the infusion pipe 2, that is, the axis of the measuring cup is aligned with the axis of the infusion pipe 2, the measuring cup and the collection plate 2003 are still kept close to each other. The large volume of the collection plate 2003 affects the normal operation of the device. Fig.11 When the displacement of point B of the measuring cup coincides with point A of the infusion pipe 2, the gear set 2004 and the rack 23 in the anti-drip component 20 begin to mesh. The gear set 2004 is composed of a plurality of gears with different gear ratio parameters. By setting the gear set 2004, the anti-drip component 20 is displaced a shorter distance to realize the rotation of the connecting rod 2002 by a certain angle, so that the collecting plate 2003 is rotated by a certain angle away from the bottom of the infusion pipe 2, thereby ensuring the normal operation of the equipment.

[0042] The moving assembly 17 continuously moves to drive the fixed assembly 14 to move to the top of the lifting platform 11, that is, the measuring cup moves to the bottom of the infusion pipe 2, and then the telescopic cylinder 12 works to push the fixed assembly 14 up, so that the measuring cup rises and fits the splash-proof cover 4, and pushes the splash-proof cover 4 to rise. The splash-proof cover 4 will compress the first spring 6 when it rises. When the equipment is running, the measuring cup will first rise to the maximum value, so that the infusion pipe 2 completely penetrates into the inside of the measuring cup, and then the control program of the equipment starts the solenoid valve 8 to make the corrosive liquid in the infusion pipe 2 begin to be injected into the inside of the measuring cup. As the corrosive liquid in the measuring cup is slowly injected, the telescopic cylinder 12 will synchronously drive the measuring cup to lower its height. Since the operator chooses to measure a specified volume of corrosive liquid, the distance sensor 9 monitors the distance between the outer convex ring 3 and the splash-proof cover 4 and controls the switch of the solenoid valve 8 according to the corresponding electrical signal data. When the measuring cup completes the measurement of the corrosive liquid, for example, when measuring 30ML, the corresponding telescopic cylinder 12 will also drive the measuring cup to descend to the specified height, and the distance sensor 9 controls the solenoid valve 8 to close through data feedback.

[0043] Next, according to the above steps, the measuring cup can be withdrawn from the box body 1 after the measurement is completed, and the operator can take the measuring cup wearing protective gloves.

[0044] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A corrosive liquid metering device, comprising a housing (1), characterized in that: A liquid infusion pipeline (2) is provided through the top of the box body (1), and a tray (10) is provided inside the box body (1), and a fixing component (14) for fixing a measuring cup is movably installed on the top of the tray (10), a lifting platform (11) is movably installed on the top of the tray (10) by opening a through slot, and a telescopic cylinder (12) is provided at the bottom of the lifting platform (11), a screw rod (15) is rotatably connected to the side of the tray (10), and one end of the screw rod (15) is connected to a driving component (16), and the external thread of the screw rod (15) is connected to a moving component (17) for driving the fixing component (14) to move, and a sliding frame (19) is movably installed on one side of the tray (10).

2. A corrosive liquid metering device according to claim 1, characterized in that: The fixing assembly (14) comprises a base (1401), and a first limiting block (1402) is arranged at the bottom of the base (1401), and a protrusion (1403) is arranged on one side of the base (1401); a plurality of groups of second guide rods (1404) are arranged inside the base (1401), and a fixing block (1405) and a second spring (1406) are sleeved on the outside of the plurality of groups of second guide rods (1404), and a fixing rod (1407) is arranged on the top of the plurality of groups of fixing blocks (1405); a plurality of groups of strip grooves (1408) matching the fixing rod (1407) are provided on the top of the base (1401), and a movable plate (1409) is rotatably connected to the top of the base (1401), and a plurality of groups of arc grooves (1410) matching the fixing rod (1407) are provided on the bottom of the movable plate (1409).

3. A corrosive liquid metering device according to claim 2, characterized in that: The tops of the tray (10) and the lifting platform (11) are both provided with a first limiting groove (13) matching the first limiting block (1402).

4. A corrosive liquid metering device according to claim 3, characterized in that: The moving assembly (17) comprises a moving seat (1701) threadedly connected to the screw rod (15), and a fitting groove (1702) matching the protrusion (1403) is provided at the bottom of the moving seat (1701), and the top of the fitting groove (1702) is arranged as an inclined surface (1703), a second limiting block (1704) is arranged at the bottom of the moving seat (1701), and a pushing block (1705) for pushing the anti-drip assembly (20) is arranged on the side of the moving seat (1701), and a second limiting groove (18) matching the second limiting block (1704) is arranged on one side of the tray (10).

5. A corrosive liquid metering device according to claim 4, characterized in that: The anti-drip assembly (20) comprises a shell (2001) movably mounted inside the sliding frame (19), the bottom of the shell (2001) is rotatably connected to a connecting rod (2002), a collecting plate (2003) is arranged at the bottom of the connecting rod (2002), and the bottom of the connecting rod (2002) is connected to a gear set (2004).

6. A corrosive liquid metering device according to claim 5, characterized in that: A third guide rod (21) is provided on one side of the housing (2001), and a third spring (22) is sleeved on the outside of the third guide rod (21), and the third guide rod (21) and the sliding frame (19) are movably inter-connected, a rack (23) is provided inside the sliding frame (19), and the rack (23) and the gear set (2004) are meshed with each other, and a semi-arc groove (24) matching the push block (1705) is provided at one end of the sliding frame (19).

7. A corrosive liquid metering device according to claim 6, characterized in that: The infusion pipeline (2) is provided with an outer convex ring (3) on the outside, and the infusion pipeline (2) is sleeved with a splash-proof cover plate (4) on the outside, a plurality of groups of first guide rods (5) are provided on the top of the splash-proof cover plate (4), and a first spring (6) is sleeved on the outside of the plurality of groups of first guide rods (5), and the plurality of groups of first guide rods (5) and the outer convex ring (3) are movably arranged to penetrate each other, and an inclined exhaust hole (7) is opened at the bottom of the splash-proof cover plate (4).

8. A corrosive liquid metering device according to claim 7, characterized in that: A distance sensor (9) for measuring the distance between the outer convex ring (3) and the splash-proof cover plate (4) is arranged at the bottom of the outer convex ring (3), and a solenoid valve (8) is arranged on the side of the infusion pipeline (2).

9. A corrosive liquid metering device according to claim 8, characterized in that: The splash-proof cover plate (4) and the collecting plate (2003) are both made of corrosion-resistant materials.

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