A glassware verification apparatus

Abstract

A glass volumetric instrument calibration device is characterized by comprising: a cleaning chamber with a cleaning chamber cover installed on its top surface; a calibration chamber with a calibration chamber cover installed on one side of the cleaning chamber; a cleaning component installed inside the cleaning chamber; a fixing component installed inside the calibration chamber; and a liquid injection component installed inside the calibration chamber. This technical solution offers high cleaning efficiency and integrates a drying function. A detachable cleaning basket is installed inside the cleaning chamber for efficient ultrasonic cleaning of the inner and outer walls of the glass volumetric instruments placed within it. Multiple dual-purpose nozzles are installed on the bottom of the cleaning basket; when placing the glassware, the open end faces downwards and is placed over the dual-purpose nozzles. After ultrasonic cleaning, a water pump supplies water to the dual-purpose nozzles and the top spray plate for high-pressure rinsing, followed by compressed air from an air pump for drying. This achieves integrated automatic operation of "cleaning-rinsing-drying," eliminating the need for manual transfer and significantly improving cleaning efficiency.

Description

Technical Field

[0001] This invention relates to a calibration device, and more particularly to a calibration device for glass measuring instruments. Background Technology

[0002] Glass volumetric instruments (volume flasks, graduated cylinders) are commonly used measuring instruments in laboratories, and their accuracy directly affects the reliability of analytical test results. According to national metrological verification regulations, glass volumetric instruments must undergo periodic capacity verification. A commonly used and highly accurate method is the weighing method, which involves weighing the mass of pure water contained in or released from the instrument, and then calculating the actual capacity by combining correction factors such as water temperature and air buoyancy.

[0003] Currently, the calibration of glass measuring instruments largely relies on manual, step-by-step operations, which presents the following technical problems: First, the cleaning process is inefficient. Existing technologies mostly employ manual brushing, followed by manual rinsing and drying, making the process cumbersome. Second, measuring instruments are prone to positional shifts or tipping during calibration. Traditionally, the measuring instruments are placed directly on the weighing pan or held in place using simple clamps. When the bottom of the measuring instrument is uneven or the platform is not level, it is impossible to level it, leading to deviations in the calibration results. Third, the liquid injection process is prone to air bubbles and splashing. The weighing method requires pure water to be accurately injected to the graduation mark of the measuring instrument, but during manual injection, the flow rate and landing point are difficult to control consistently. Direct impact of the liquid flow on the bottom or wall of the instrument can easily generate air bubbles and splashing, leading to incorrect liquid level readings.

[0004] To address the above issues, we provide a glass volumetric instrument calibration device. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a glass volumetric instrument calibration device.

[0006] The objective of this invention is achieved as follows:

[0007] A glass volumetric instrument calibration device includes a cleaning box, the top surface of which is fitted with a cleaning box cover;

[0008] A calibration box is provided on one side of the cleaning box, and a calibration box cover is installed on one side of the calibration box;

[0009] Cleaning components are installed inside the cleaning chamber;

[0010] The fixing component is installed inside the calibration box;

[0011] The liquid injection assembly is installed inside the calibration chamber.

[0012] Furthermore, a cleaning basket is detachably installed on the upper part of the inner cavity of the cleaning box.

[0013] Furthermore, the cleaning basket includes a grid base plate, side uprights, horizontal rails, and connecting frames. Side uprights are provided at each corner of the top surface of the grid base plate, and several horizontal rails are provided between two adjacent side uprights. Connecting frames are provided on the top surfaces of two uprights on the left, right, front, and back sides, and the other end of the connecting frames is detachably connected to the side wall of the cleaning basket.

[0014] Furthermore, an electrical box is installed on one side of the cleaning box, and an electrical box door is installed on one side of the electrical box. A controller is installed inside the electrical box to control various electrical components.

[0015] Furthermore, the cleaning assembly includes an ultrasonic generator, an ultrasonic transducer, a dual-purpose nozzle, a water pump, an air pump, an inlet pipe, and a T-connector. The ultrasonic generator is installed inside the electrical box, and the ultrasonic transducer is installed on the bottom surface of the cleaning box. The ultrasonic generator and the ultrasonic transducer are connected by a circuit. A water pump and an air pump are installed on one side of the cleaning box. Several channels are opened inside the bottom surface of the cleaning basket, and these channels are interconnected. Several dual-purpose nozzles are installed on the bottom surface of the cleaning basket, and these dual-purpose nozzles are connected to the channels. An inlet pipe is installed through the side wall of the cleaning box. One end of the inlet pipe is connected to the channel via a pipe, and one end of the inlet pipe is connected to a T-connector. The other two ends of the T-connector are respectively connected to the outlet ends of the water pump and the air pump via pipes.

[0016] Furthermore, the cleaning component includes a top spray plate, which is provided on the bottom surface of the cleaning box cover. The top spray plate has a hollow structure and is connected to one end of the inlet pipe via a pipe.

[0017] Furthermore, an outlet pipe is provided at the bottom of the side wall of the cleaning box, and an outlet valve is provided inside the outlet pipe.

[0018] Furthermore, two calibration boxes are provided.

[0019] Furthermore, the fixing assembly includes a base slide rail, a sliding base, a base push rod, a lower end plate, an upper end plate, a ball joint connector, a telescopic push rod, an upper end plate, a weighing sensor, and a placement frame. A set of base slide rails is provided on the bottom surface of the inner cavity of the calibration box, and a sliding base is slidably connected to the base slide rails. A base push rod is installed at the bottom of the inner cavity of the calibration box, and the output end of the base push rod is fixedly connected to one side of the sliding base.

[0020] The sliding base has a lower end plate on its top surface. There are three sets of telescopic push rods, two in each set. The upper and lower ends of the six telescopic push rods are connected to the upper end plate and the lower end plate respectively through ball joint connectors. The upper end of the telescopic push rod is fixedly connected to the movable end of the ball joint connector. The base of the six ball joint connectors is fixedly installed on the bottom surface of the upper end plate. The lower end of the telescopic push rod is fixedly connected to the movable end of the ball joint connector. The base of the six ball joint connectors is fixedly installed on the top surface of the lower end plate. A weighing sensor is installed on the top surface of the upper end plate. The detection end of the weighing sensor is provided with a placement frame.

[0021] Furthermore, the fixing assembly also includes a flexible belt, a fixing bladder, a mounting frame, a fixing push rod, a fixing push plate, and a vacuum pump. The placement frame includes a fixed base plate and fixed side plates. Fixed side plates are respectively provided on both sides of the top surface of the fixed base plate. The interval between the edges of the two fixed side plates is an observation window. A flexible belt is provided between the two ends of the fixed side plates. A fixing bladder is fixedly connected to the inner side of the flexible belt. The bottom of the fixing bladder is fixedly connected to the fixed base plate. Mounting frames are respectively provided on both sides of the fixed base plate. A fixing push rod is installed at the top of the mounting frame. The output end of the fixing push rod faces the fixed base plate and is provided with a fixing push plate. The fixing push rod drives the fixing push plate to press against the fixing bladder. A vacuum pump is installed on the outer side of the mounting frame. The inlet end of the vacuum pump is connected to the inner cavity of the fixing bladder through a pipe.

[0022] Furthermore, the injection assembly includes an injection slide rail, an injection platform, an injection moving push rod, an injection moving buckle, an injection mounting base, an injection telescopic push rod, an injection head, and an injection pump. A set of injection slide rails is provided on the top surface of the inner cavity of the calibration chamber. The injection platform is slidably connected to the bottom surface of the injection slide rails. An injection moving push rod is installed on one side of the inner cavity of the calibration chamber. An injection moving buckle is provided at the output end of the injection moving push rod. The injection moving buckle is detachably connected to one side of the injection platform. An injection mounting base is installed on the bottom surface of the injection platform. An injection telescopic rod is installed on the bottom surface of the injection mounting base. An injection head is installed at the movable end of the injection telescopic rod. An injection pump is installed on the top surface of the calibration chamber. The injection pump and the injection head are connected by a pipeline.

[0023] Furthermore, the injection head has an inverted conical structure, and the injection head is divided into three injection ends, which are fixedly connected to each other. Each injection end has an injection hole, and the three injection holes are respectively connected to the injection pump through pipes.

[0024] Furthermore, a splash-proof guide sleeve is provided on the outside of the injection head.

[0025] Advantages of this invention:

[0026] 1. The technical solution of this application offers high cleaning efficiency and integrates a drying function. A detachable cleaning basket is installed inside the cleaning chamber for efficient ultrasonic cleaning of the inner and outer walls of glass containers placed within. Multiple dual-purpose nozzles are installed on the bottom of the cleaning basket; when placing glassware, the open end faces downwards, covering the nozzles. After ultrasonic cleaning, a water pump supplies high-pressure water to the nozzles and top spray plate for rinsing, followed by compressed air drying via an air pump. This achieves integrated automatic operation of "cleaning-rinsing-drying," eliminating the need for manual handling and significantly improving cleaning efficiency.

[0027] 2. The technical solution of this application can achieve precise leveling and stable clamping. The fixing component adopts six sets of spatially distributed telescopic push rods. Each push rod is connected to the upper and lower end plates by ball joint connectors at both ends, forming a leveling structure. By independently controlling the extension and retraction of each telescopic push rod, the orientation of the placement frame can be finely adjusted in six degrees of freedom, ensuring the verticality of the measuring instrument axis and eliminating weighing errors caused by uneven table surface or uneven bottom of the instrument. At the same time, flexible belts and fixing bladders are set on both sides of the placement frame. The fixing push plate driven by the fixing push rods squeezes the fixing bladder, making it tightly press against the flexible belt, and then tightly fits the outer wall of the glass measuring instrument. Then, a vacuum pump is used to evacuate the fixing bladder, causing the particles inside to squeeze and block each other and solidify, transforming the fixing bladder into a high-rigidity rigid body, thereby achieving a firm clamping of the glass measuring instrument. This effectively prevents the measuring instrument from tipping over or shifting during the verification process and does not damage the glass surface.

[0028] 3. The liquid injection solution of this application avoids bubbles and splashing. The liquid injection assembly can automatically center and extend to the appropriate depth according to the diameter and height of the glass volumetric vessel. The injection head has an inverted conical structure and is divided into three equal injection ends, with each of the three injection holes supplying liquid independently. Different injection flow rates are achieved by using different injection hole diameters. The entire liquid injection process is divided into three stages: a fast injection stage, a slow injection stage, and a dripping stage, to precisely control the liquid injection process. At the same time, the injection head gradually moves upward during the liquid injection process, significantly reducing the liquid's falling distance, thereby reducing phenomena such as bubbles and splashing. Attached Figure Description

[0029] Figure 1 A schematic diagram of the structure of a glass volumetric instrument calibration device. Figure 1 .

[0030] Figure 2 A schematic diagram of the structure of a glass volumetric instrument calibration device. Figure 2 .

[0031] Figure 3 This is a diagram showing the electrical box being opened.

[0032] Figure 4 Schematic diagram of the cross-sectional structure of a glass volumetric instrument calibration device Figure 1 .

[0033] Figure 5 This is a diagram showing how to open the cleaning box.

[0034] Figure 6 This is a diagram showing the calibration box being opened.

[0035] Figure 7 Schematic diagram of the cross-sectional structure of the calibration box Figure 1 .

[0036] Figure 8 Schematic diagram of the cross-sectional structure of the calibration box Figure 2 .

[0037] Figure 9 Schematic diagram of the injection head structure Figure 1 .

[0038] Figure 10 Schematic diagram of the injection head structure Figure 2 .

[0039] Figure 11 Schematic diagram of the cross-sectional structure of a glass volumetric instrument calibration device Figure 2 .

[0040] In the picture:

[0041] 1. Cleaning box; 11. Cleaning box lid; 12. Cleaning basket; 121. Grid base plate; 122. Side uprights; 123. Horizontal rail; 124. Connecting frame; 13. Electrical box; 131. Controller; 14. Outlet pipe; 15. Outlet valve;

[0042] 2. Cleaning components; 21. Ultrasonic generator; 22. Ultrasonic transducer; 23. Dual-purpose nozzle; 24. Water pump; 25. Air pump; 26. Inlet pipe; 27. T-connector; 28. Top spray plate;

[0043] 3. Calibration box; 31. Calibration box lid;

[0044] 4. Fixing components; 41. Base slide rail; 42. Sliding base; 43. Base push rod; 44. Lower end plate; 45. Upper end plate; 46. Ball joint connector; 47. Telescopic push rod; 48. Weighing sensor; 49. Placement frame; 4901. Fixing base plate; 4902. Fixing side plate; 4903. Observation window; 491. Flexible belt; 492. Fixing bladder; 493. Mounting bracket; 494. Fixing push rod; 495. Fixing push plate; 496. Vacuum pump;

[0045] 5. Injection assembly; 51. Injection slide rail; 52. Injection platform; 53. Injection moving push rod; 54. Injection moving buckle; 55. Injection mounting base; 56. Injection telescopic push rod; 57. Injection head; 571. Injection end; 572. Injection hole; 58. Injection pump; 59. Anti-splash guide sleeve;

[0046] 6. Industrial cameras. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0048] This application provides a glass volumetric instrument calibration device.

[0049] Example 1, as Figure 1-11 As shown.

[0050] A glass volumetric instrument calibration device includes a cleaning chamber 1, in which the glass volumetric instrument is cleaned to prevent waste liquid from splashing.

[0051] The top surface of the cleaning box 1 is equipped with a cleaning box cover 11. After opening the cleaning box cover 11, the glass measuring instrument is placed inside.

[0052] A cleaning basket 12 is detachably installed on the upper part of the inner cavity of the cleaning box 1, into which glass measuring instruments are placed for cleaning.

[0053] The cleaning basket 12 includes a grid base plate 121, side uprights 122, horizontal rails 123, and connecting frames 124. Side uprights 122 are provided at each corner of the top surface of the grid base plate 121. Several horizontal rails 123 are provided between adjacent side uprights 122. Connecting frames 124 are provided on the top surface of two uprights on the left, right, front, or back sides. The other end of each connecting frame 124 is detachably connected to the side wall of the cleaning box 1. The inner wall of the cleaning box 1 has multiple mounting positions for the connecting frames 124, allowing adjustment of the height of the cleaning basket 12 to accommodate glass measuring instruments of different heights and sizes. This ensures that all glass measuring instruments can be cleaned.

[0054] An electrical box 13 is installed on one side of the cleaning box 1, and an electrical box 13 door is installed on the same side. A controller 131 is installed inside the electrical box 13. The controller 131 is connected to each electrical component via circuitry to control the various electrical components. The controller 131 is preferably a PLC controller 131. However, those skilled in the art can select other controllers 131 depending on the control method used in the implementation. The specific model can be selected by those skilled in the art.

[0055] A glass volumetric instrument calibration device includes a cleaning component 2 installed inside the cleaning chamber 1. The cleaning component 2 performs an integrated automatic operation of "cleaning-rinsing-drying" on the glass volumetric instrument, eliminating the need for manual transfer and significantly improving cleaning efficiency.

[0056] The cleaning assembly 2 includes an ultrasonic generator 21, an ultrasonic transducer 22, a dual-purpose nozzle 23, a water pump 24, an air pump 25, an inlet pipe 26, and a three-way pipe 27. The ultrasonic generator 21 is installed inside the electrical box 13, and the ultrasonic transducer 22 is installed on the bottom surface of the cleaning box 1. The ultrasonic generator 21 and the ultrasonic transducer 22 are connected by a circuit. The models of the ultrasonic generator 21 and the ultrasonic transducer 22 can be selected by those skilled in the art. The ultrasonic generator 21 and the ultrasonic transducer 22 are used to ultrasonically clean the glass containers in the cleaning basket 12.

[0057] A water pump 24 and an air pump 25 are installed on one side of the cleaning box 1. Several channels are opened inside the bottom of the cleaning basket 12, and these channels are interconnected. Several dual-purpose nozzles 23 are installed on the bottom of the cleaning basket 12, and these nozzles are connected to the channels. When placing a glass volumetric instrument in the cleaning basket 12, it is placed upside down, ensuring that the opening of the glass volumetric instrument is below the several dual-purpose nozzles 23 so that the nozzles can spray water for rinsing and blow air for drying.

[0058] An inlet pipe 26 is installed through the side wall of the cleaning box 1. One end of the inlet pipe 26 is connected to the channel through a pipe. One end of the inlet pipe 26 is connected to a three-way pipe 27. The other two ends of the three-way pipe 27 are connected to the outlet ends of the water pump 24 and the air pump 25 through pipes, respectively.

[0059] The cleaning assembly 2 includes a top spray plate 28, which is disposed on the bottom surface of the cleaning chamber cover 11. The top spray plate 28 has a hollow structure and is connected to one end of the inlet pipe 26 via a pipe. The bottom surface of the top spray plate 28 is provided with a plurality of dual-purpose nozzles, which rinse and dry the glass volumetric instruments from the top of the cleaning chamber downwards.

[0060] The water pump 24 is connected to an external water source through a pipe, and water is pumped into the channel in the grid base plate 121 and the top spray plate 28 through the inlet pipe 26. The water is then sprayed out through the dual-purpose nozzle 23 to rinse the glass volumetric vessel from both the top and bottom sides, ensuring that both the inner and outer sides of the glass volumetric vessel are thoroughly rinsed.

[0061] After rinsing, the air pump 25 pumps air through the inlet pipe 26 into the channel in the grid base plate 121 and the top spray plate 28, and then sprays it out through the dual-purpose nozzle 23, blowing it from the top and bottom sides onto the glass volumetric vessel to ensure that both the inside and outside sides of the glass volumetric vessel can be thoroughly dried.

[0062] After drying is complete, open the cleaning box cover 11 and take out the glass measuring instrument. This completes the integrated automatic operation of "cleaning-rinsing-drying" of the glass measuring instrument.

[0063] The bottom of the side wall of the cleaning tank 1 is provided with a discharge pipe 14, and a discharge valve 15 is provided inside the discharge pipe 14. Wastewater generated during the cleaning process is discharged through the discharge pipe 14. An external pipe is connected to the discharge pipe 14 for drainage.

[0064] A glass volumetric instrument calibration device includes a calibration chamber 3. The calibration chamber 3 is located on one side of the cleaning chamber 1, and a calibration chamber cover 31 is installed on one side of the calibration chamber 3. Two calibration chambers 3 are provided, which can calibrate two glass volumetric instruments simultaneously, or the two calibration chambers 3 can be used alternately.

[0065] The calibration chamber cover 31 is an automatic swing door structure that moves outward along the opening on the outside of the calibration chamber 3. The calibration chamber cover 31 is an automatic swing door driven by an electric cylinder. The specific model can be selected by those skilled in the art. The calibration chamber cover 31 is controlled by the controller 131 to open and close. After cleaning, the glass volumetric instruments are calibrated inside the calibration chamber 3.

[0066] A glass measuring instrument calibration device includes a fixing component 4, which is installed inside the calibration box 3 to fix the glass measuring instrument to be calibrated so as to calibrate the glass measuring instrument by means of a measuring method.

[0067] The fixing assembly 4 includes a base slide rail 41, a sliding base 42, a base push rod 43, a lower end plate 44, an upper end plate 45, a ball joint connector 46, a telescopic push rod 47, a weighing sensor 48, and a placement frame 49. A set of base slide rails 41 is provided on the bottom surface of the inner cavity of the calibration box 3. The sliding base 42 is slidably connected to the base slide rails 41. A base push rod 43 is installed at the bottom of the inner cavity of the calibration box 3. The output end of the base push rod 43 is fixedly connected to one side of the sliding base 42. The base push rod 43 is an electric push rod; any model can be selected by those skilled in the art. The base push rod 43 extends and retracts, thereby driving the sliding base 42 to slide along the base slide rails 41. When the lid of the calibration box 3 is opened, the base push rod 43 extends, causing one side of the sliding base 42 to extend outside the calibration box 3, allowing personnel to retrieve and place glass measuring instruments.

[0068] The sliding base 42 has a lower end plate 44 on its top surface. There are three sets of telescopic push rods 47, with two rods in each set, arranged in a V-shape. The telescopic push rods 47 are electrically operated, and those skilled in the art can choose accordingly.

[0069] The upper and lower ends of the six telescopic push rods 47 are respectively connected to the upper end plate 45 and the lower end plate 44 via ball joint connectors 46. The upper end of the telescopic push rod 47 is fixedly connected to the movable end of the ball joint connector 46. The bases of the six ball joint connectors 46 are fixedly installed on the bottom surface of the upper end plate 45. The lower end of the telescopic push rod 47 is fixedly connected to the movable end of the ball joint connector 46. The bases of the six ball joint connectors 46 are fixedly installed on the top surface of the lower end plate 44.

[0070] The six telescopic push rods 47 are spatially distributed, forming a six-degree-of-freedom parallel structure together with the upper end plate 45, the lower end plate 44, and the ball joint connector 46. The controller 131 can independently control the extension and retraction of each telescopic push rod 47, thereby enabling multi-degree-of-freedom attitude adjustment of the upper end plate 45, ensuring that the axis of the glass measuring instrument within the placement frame 49 is perpendicular, and eliminating errors caused by unevenness of the placement platform of the calibration box 3 or unevenness of the bottom of the measuring instrument.

[0071] A load cell 48 is mounted on the top surface of the upper end plate 45, and a placement frame 49 is provided at the detection end of the load cell 48. The glass volumetric instrument to be calibrated is placed inside the placement frame 49. The weight of the glass volumetric instrument placed inside the placement frame 49 is measured by the load cell 48, and then calibrated by a weighing method. The model of the load cell 48 can be selected by those skilled in the art.

[0072] The fixing component 4 further includes a flexible belt 491, a fixing bladder 492, a mounting bracket 493, a fixing push rod 494, a fixing push plate 495, and a vacuum pump 496. The placement frame 49 includes a fixing base plate 4901 and fixing side plates 4902. Fixing side plates 4902 are respectively provided on both sides of the top surface of the fixing base plate 4901. The interval between the edges of the two fixing side plates 4902 is an observation window 4903. The liquid injection process and the liquid level detection structure are observed and detected through the observation window 4903. When placing the glass volumetric instrument, the scale of the volumetric instrument is positioned within the observation window 4903.

[0073] A flexible band 491 is provided between the two ends of the fixed side plate 4902. A fixing bladder 492 is fixedly connected to the inner side of the flexible band 491. The bottom of the fixing bladder 492 is fixedly connected to the fixed base plate 4901. The fixing bladder 492 is filled with solid particles. The solid particles can be spherical ceramic beads or steel balls. Three diameter specifications are preferred: large particles: 0.8~1.0 mm, accounting for 50%; medium particles: 0.3~0.4 mm, accounting for 30%; small particles: 0.05~0.1 mm, accounting for 20%. Mounting brackets 493 are provided on both sides of the fixed base plate 4901. A fixing push rod 494 is mounted on the top of the mounting bracket 493. The output end of the fixing push rod 494 faces the fixed base plate 4901 and is provided with a fixing push plate 495. The fixing push rod 494 is an electric push rod, and its model can be selected by those skilled in the art.

[0074] The fixed push rod 494 drives the fixed push plate 495 to press against the fixed bladder 492. A vacuum pump 496 is installed on the outside of the mounting bracket 493. The inlet end of the vacuum pump 496 is connected to the inner cavity of the fixed bladder 492 through a pipe.

[0075] The fixing capsule 492 is filled with multiple solid particles and is flexible under normal conditions. When the glass volumetric instrument is placed on the fixing base plate 4901 and located between the two flexible strips 491, the controller 131 first activates the fixing push rod 494, which drives the fixing push plate 495 to press the fixing capsule 492 away from the flexible strip 491, so that the other side of the fixing capsule 492 tightly squeezes the flexible strip 491, making the fixing capsule 492 and the flexible strip 491 closely fit the outer wall of the glass volumetric instrument.

[0076] Then, the vacuum pump 496 is activated to evacuate the inner cavity of the fixing capsule 492. Under negative pressure, the solid particles inside the fixing capsule 492 are squeezed, blocked, and solidified, transforming the fixing capsule 492 into a high-rigidity rigid body, thereby achieving a firm clamping of the glass measuring instrument. This clamping method can prevent the measuring instrument from tipping over or shifting during the calibration process without damaging the glass surface. After the calibration is completed, the vacuum pump 496 releases the vacuum, the fixing capsule 492 returns to its flexibility, and the fixing push rod 494 retracts, allowing the measuring instrument to be easily removed.

[0077] A glass volumetric instrument calibration device includes a liquid injection assembly 5, installed inside the calibration chamber 3, to perform liquid injection operations. The entire liquid injection process is divided into three stages: a fast injection stage, a slow injection stage, and a dripping stage, allowing for precise control of the injection process.

[0078] The liquid injection assembly 5 includes a liquid injection slide rail 51, a liquid injection platform 52, a liquid injection moving push rod 53, a liquid injection moving buckle 54, a liquid injection mounting base 55, a liquid injection telescopic push rod 56, a liquid injection head 57, and a liquid injection pump 58. A set of liquid injection slide rails 51 is provided on the top surface of the inner cavity of the calibration chamber 3. The bottom surface of the liquid injection slide rails 51 is slidably connected to the liquid injection platform 52. A liquid injection moving push rod 53 is installed on one side of the inner cavity of the calibration chamber 3. The output end of the liquid injection moving push rod 53 is provided with a liquid injection moving buckle 54, which is detachably connected to one side of the liquid injection platform 52. The liquid injection moving push rod 53 is an electric push rod that can push the liquid injection platform 52 along the liquid injection slide rail 51 to move it directly above the glass volumetric vessel for liquid injection into the vessel.

[0079] The bottom surface of the liquid injection platform 52 is equipped with a liquid injection mounting base 55, and the bottom surface of the liquid injection mounting base 55 is equipped with a liquid injection telescopic rod. The movable end of the liquid injection telescopic rod is equipped with a liquid injection head 57. The liquid injection telescopic rod is an electric push rod, which can drive the liquid injection head 57 to penetrate deeper into the glass volumetric vessel for liquid injection, thereby reducing the drip height of the liquid and reducing bubbles and splashes generated during the liquid injection process.

[0080] A liquid injection pump 58 is installed on the top surface of the calibration box 3, and the liquid injection pump 58 is connected to the liquid injection head 57 via a pipe. The liquid injection pump 58 is connected to an external water source, and pumps water 24 into the liquid injection head 57, which then injects the liquid into the glass volumetric container. During the entire liquid injection process, the controller 131 controls the liquid injection telescopic rod to gradually move upward, so that the liquid injection head 57 is always kept about 5mm above the liquid surface, reducing the liquid drop distance and avoiding the generation of bubbles and splashing caused by liquid flow impact.

[0081] The injection head 57 has an inverted conical structure and is divided into three injection ends 571, which are fixedly connected. Each injection end 571 has an injection hole 572, and the three injection holes 572 are respectively connected to the injection pump 58 through pipes. Each of the three injection holes 572 is equipped with a solenoid valve at its upper end, which controls the opening and closing of the injection hole 572, so that injection is performed through a different injection hole 572 at each stage.

[0082] The injection holes 572 on the three injection tips 571 are set to have different diameters, corresponding to three flow rates: fast injection, slow injection, and dripping. The flow rate difference among the three independent injections is achieved through the physical dimensions of the inner diameter of the injection holes 572, rather than through multiple pumps. The combination of pumps and valves enables a wide range and high precision three-stage injection.

[0083] The controller 131 adjusts the horizontal position of the injection platform 52 via the injection movement push rod 53, aligning the injection head 57 with the mouth of the glass volumetric container. Then, the injection head 57 is lowered to a position near the bottom inside the glass volumetric container via the injection telescopic rod. During injection, the controller 131 controls the injection pump 58 according to a three-stage procedure: first, it opens the pipe corresponding to the large-diameter injection hole 572 for rapid injection to near the graduation mark; then it switches to the medium-diameter injection hole 572 for slow injection; finally, it switches to the small-diameter injection hole 572 for drop-by-drop injection to precisely reach the graduation mark. Throughout the injection process, the controller 131 controls the injection telescopic rod to gradually move upwards, keeping the injection head 57 approximately 5mm above the liquid surface to reduce the liquid's falling distance and prevent air bubbles and splashing caused by liquid flow impact.

[0084] A splash-proof guide sleeve 59 is provided on the outside of the injection head 57. The splash-proof guide sleeve 59 is saucer-shaped and is fitted onto the outside of the injection head 57. Splashed liquid is blocked by the splash-proof guide sleeve 59, and the liquid is guided along its bottom wall into the glass volumetric container to ensure accurate injection quality.

[0085] After the liquid injection is completed, the weight of the injected liquid is detected by the weighing sensor 48, and the volume is calculated. Finally, its qualification is determined according to the tolerance standard of the glass volumetric instrument calibration standard.

[0086] An industrial camera is installed on one side of the inner cavity of the calibration chamber 3 to detect the alignment of the liquid level in the glass volumetric vessel with the graduation lines. Two industrial cameras 6 are installed to ensure clear identification. High-resolution models of industrial cameras 6 are selected. The industrial cameras 6 acquire images of the graduation area of ​​the glass volumetric vessel, and through image processing algorithms, identify the position of the graduation lines and the lowest point of the meniscus of the liquid surface to determine whether they are aligned, thus meeting the requirements of high-precision calibration.

[0087] Both the cleaning box and the testing box are equipped with viewing windows on their side walls so that staff can observe the internal conditions.

[0088] When using this invention:

[0089] First, open the cleaning box and invert the glass volumetric instrument onto the dual-purpose spray head inside the cleaning basket to complete cleaning, rinsing, and drying. Then, transfer the dried volumetric instrument to the placement frame inside the calibration box, where it is leveled and clamped by the fixing component. Next, the liquid injection component automatically centers and extends into the glass volumetric instrument, injecting pure water to the graduation mark according to a three-stage procedure. The weighing sensor measures the mass before and after liquid injection in real time, then calculates the actual capacity. Finally, it determines whether the volumetric instrument is qualified according to the tolerance standard of the glass volumetric instrument calibration standard.

[0090] It should be noted that, in this document, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0091] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims. It should be understood that this application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A glass volumetric instrument calibration device, characterized in that: Includes a cleaning box, the top surface of which is fitted with a cleaning box cover; A calibration box is provided on one side of the cleaning box, and a calibration box cover is installed on one side of the calibration box; Cleaning components are installed inside the cleaning chamber; The fixing component is installed inside the calibration box; The liquid injection assembly is installed inside the calibration chamber.

2. The glass volumetric instrument calibration device according to claim 1, characterized in that: A cleaning basket is detachably installed on the upper part of the inner cavity of the cleaning box.

3. The glass volumetric instrument calibration device according to claim 2, characterized in that: The cleaning basket includes a grid base plate, side uprights, horizontal rails, and connecting frames. Side uprights are provided at each corner of the top surface of the grid base plate, and several horizontal rails are provided between two adjacent side uprights. Connecting frames are provided on the top surfaces of two uprights on the left, right, front, and back sides, and the other end of the connecting frames is detachably connected to the side wall of the cleaning basket.

4. The glass volumetric instrument calibration device according to claim 1, characterized in that: An electrical box is installed on one side of the cleaning box, and an electrical box door is installed on the other side of the electrical box. A controller is installed inside the electrical box to control various electrical components.

5. The glass volumetric instrument calibration device according to claim 1, characterized in that: The cleaning assembly includes an ultrasonic generator, an ultrasonic transducer, a dual-purpose nozzle, a water pump, an air pump, an inlet pipe, and a T-connector. The ultrasonic generator is installed inside the electrical box, and the ultrasonic transducer is installed on the bottom of the cleaning box. The ultrasonic generator and the ultrasonic transducer are connected by an electrical circuit. The water pump and the air pump are installed on one side of the cleaning box. Several channels are opened inside the bottom of the cleaning basket, and these channels are interconnected. Several dual-purpose nozzles are installed on the bottom of the cleaning basket, and these dual-purpose nozzles are connected to the channels. An inlet pipe is installed through the side wall of the cleaning box. One end of the inlet pipe is connected to the channel via a pipe, and one end of the inlet pipe is connected to a T-connector. The other two ends of the T-connector are connected to the outlet ends of the water pump and the air pump, respectively, via pipes.

6. The glass volumetric instrument calibration device according to claim 5, characterized in that: The cleaning assembly includes a top spray plate, which is provided on the bottom surface of the cleaning box cover. The top spray plate has a hollow structure and is connected to one end of the inlet pipe via a pipe.

7. A glass volumetric instrument calibration device according to claim 1, characterized in that: The bottom of the side wall of the cleaning box is provided with an outlet pipe, and an outlet valve is provided inside the outlet pipe.

8. A glass volumetric instrument calibration device according to claim 1, characterized in that: Two calibration boxes are provided.

9. A glass volumetric instrument calibration device according to claim 1, characterized in that: The fixing assembly includes a base slide rail, a sliding base, a base push rod, a lower end plate, an upper end plate, a ball joint connector, a telescopic push rod, an upper end plate, a weighing sensor, and a placement frame. A set of base slide rails is provided on the bottom surface of the inner cavity of the calibration chamber. A sliding base is slidably connected to the base slide rails. A lower end plate is provided on the top surface of the sliding base. There are three sets of telescopic push rods, two in each set. The upper and lower ends of the six telescopic push rods are respectively connected to the upper end plate and the lower end plate via ball joint connectors. The upper end of each telescopic push rod is fixedly connected to the movable end of the ball joint connector. The bases of the six ball joint connectors are fixedly installed on the bottom surface of the upper end plate. The lower end of each telescopic push rod is fixedly connected to the movable end of the ball joint connector. The bases of the six ball joint connectors are fixedly installed on the top surface of the lower end plate. A weighing sensor is installed on the top surface of the upper end plate, and a placement frame is provided on the detection end of the weighing sensor.

10. A glass volumetric instrument calibration device according to claim 9, characterized in that: The fixing assembly also includes a flexible belt, a fixing bladder, a mounting frame, a fixing push rod, a fixing push plate, and a vacuum pump. The placement frame includes a fixing base plate and fixing side plates. Fixing side plates are respectively provided on both sides of the top surface of the fixing base plate. The interval between the edges of the two fixing side plates is an observation window. A flexible belt is provided between the two ends of the fixing side plates. A fixing bladder is fixedly connected to the inner side of the flexible belt. The bottom of the fixing bladder is fixedly connected to the fixing base plate. The inner cavity of the fixing bladder is filled with several solid particles. Mounting brackets are provided on both sides of the fixed base plate. A fixed push rod is installed at the top of the mounting bracket. The output end of the fixed push rod faces the fixed base plate and is provided with a fixed push plate. The fixed push rod drives the fixed push plate to press against the fixed bladder. A vacuum pump is installed on the outside of the mounting bracket. The inlet end of the vacuum pump is connected to the inner cavity of the fixed bladder through a pipe.

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