Glass floating meter calibrating device

Abstract

The utility model discloses a glass floating meter calibrating device which comprises a calibrating vessel assembly, the calibrating vessel assembly comprises a plurality of solution cylinders used for containing calibrating solutions, and the upper ends of the solution cylinders are provided with openings used for placing glass floating meters. And an overflow port for the internal solution to flow out is formed in the peripheral wall of the solution cylinder at a set height. According to the utility model, the automatic calibrating device is adopted, the real-time blending of the calibrating solution in the calibrating vessel is realized through the magnetic pump system and the magnetic stirrer, on the basis of the high precision of the solution prepared by the machine, the instant preparation and instant detection of the calibrating solution are also realized, the influence of long storage time and temperature on the solution is avoided, and the accuracy of the calibrating result is ensured; the arrangement of the plurality of verification vessels is matched with the automatic scheduling of the multi-axis manipulator clamping mechanism, so that the batch rapid verification work of the plurality of glass floating gauges is realized, and the verification efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass float gauge calibration, and relates to a glass float gauge calibration device. Background Art

[0002] Glass float, also known as hydrometer, density meter, concentration meter, is used to measure the specific gravity of various fluids, semi-fluids or mixtures, or to measure the percentage concentration of solutions or mixtures; after the glass float is completed, it is also necessary to be calibrated in accordance with the JJG42-2023 "Working Glass Float Calibration Procedure" formulated by the state, and it can only be put into use after passing the calibration.

[0003] Under the calibration method specified in the regulations, a qualified glass float needs to be calibrated and qualified in calibration solutions of different concentrations. Glass floats of different specifications and models correspond to different solutions and concentration ratios. According to existing regulations, manual liquid preparation is usually required, which is time-consuming and has large errors. In addition, some calibration solutions (such as alcohol aqueous solution, ethyl sulfate, and sulfuric acid aqueous solution) are easily affected by temperature and storage time and change. Therefore, in order to ensure the accuracy of the calibration results, it is necessary to adjust and test immediately. However, the low efficiency of manual calibration makes it impossible to achieve such an effect. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a glass float gauge calibration device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A glass float calibration device includes a calibration vessel assembly, the calibration vessel assembly includes a plurality of solution cylinders for accommodating calibration solutions, the upper ends of the solution cylinders are provided with openings for placing glass floats, and overflow ports for internal solutions to flow out are provided at a set height on the peripheral walls of the solution cylinders; a placement rack is provided at one side of the calibration vessel assembly, the placement rack is provided with a plurality of slots for inserting the thin end of the glass float upward; a multi-axis manipulator clamping mechanism for adjusting the glass float on the placement rack and the solution cylinders; and a camera is provided facing the solution cylinders.

[0007] Furthermore, the number of the solution cylinders is set to three, and they are arranged in a linear array.

[0008] Furthermore, an upper cover is arranged on the top of the solution cylinder, and two limiting holes for inserting the glass float are provided on the upper cover, and the two limiting holes are separated by a set interval.

[0009] Furthermore, the solution cylinder is made of transparent material.

[0010] Furthermore, it also includes a liquid receiving trough, which is arranged below the overflow port, the liquid receiving trough is inclined, and the lower end of the liquid receiving trough is connected to a waste liquid bucket.

[0011] Furthermore, the multi-axis manipulator clamping mechanism includes a transverse rail horizontally arranged above the placement rack and the solution cylinder, a lifting rail is vertically slidably provided on the transverse rail, a rotating motor is slidably provided on the lifting rail, and a main clamping jaw for clamping the glass float is connected to the output shaft of the rotating motor.

[0012] Furthermore, it also includes a secondary clamping jaw for clamping the thick end of the glass float, and the secondary clamping jaw is arranged on the lifting rail.

[0013] Furthermore, the camera includes a first camera and a second camera, both of which are arranged toward the solution cylinder, and also includes a slide rail, on which a mobile platform is slidably arranged, and both of the first camera and the second camera are arranged on the mobile platform, and the length direction of the slide rail is arranged along the arrangement direction of the solution cylinder.

[0014] Furthermore, it also includes a light source, which includes a background light source and a ring light source respectively arranged on both sides of the solution cylinder.

[0015] Furthermore, a magnetic pump system is provided below the solution cylinder, and the magnetic pump system includes a liquid storage barrel and a magnetic pump for pumping the liquid in the liquid storage barrel into the solution cylinder; and also includes a magnetic stirrer for stirring the solution in the solution cylinder, and the magnetic stirrer is provided at the bottom of the solution cylinder.

[0016] In summary, the utility model is beneficial in that:

[0017] The utility model adopts an automated calibration device, which realizes real-time preparation of the calibration solution in the calibration vessel through a magnetic pump system and a magnetic stirrer. On the basis of high-precision liquid preparation by the machine, it also realizes immediate preparation and testing of the calibration solution, avoids the influence of long storage time and temperature on the solution, and ensures the accuracy of the calibration result; the setting of multiple calibration vessels, in conjunction with the automated scheduling of the multi-axis manipulator clamping mechanism, realizes the batch rapid calibration of multiple glass float meters, and greatly improves the efficiency of the calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the glass float gauge calibration device of the utility model.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure inside the neutral cabinet.

[0020] Figure 3It is a schematic diagram of the structure of the solution cylinder.

[0021] Markings in the figure: 1. Vertical cabinet; 11. Partition; 2. Control unit; 3. Placement rack; 4. Calibration vessel assembly; 41. Solution cylinder; 42. Limit hole; 43. Overflow port; 44. Magnetic stirrer; 45. Liquid storage barrel; 46. Liquid receiving tank; 5. Image acquisition device; 51. First camera; 52. Second camera; 53. Slide rail; 6. Multi-axis manipulator clamping mechanism; 61. Transverse rail; 62. Lifting rail; 63. Main clamp; 64. Rotating motor; 65. Auxiliary clamp; 7. Light source. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0024] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0025] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0026] The utility model provides an automatic calibration device for calibrating a glass float meter, comprising a vertical cabinet 1, wherein the vertical cabinet 1 forms an internal space for accommodating various components of the device, and the calibration work is performed in the internal space, isolating the interference of the external environment.

[0027] The glass float described in the utility model, i.e., a hydrometer, has a thick end for immersing in liquid and a thin end for setting a scale line ruler on both sides. The scale line includes a plurality of scale lines neatly arranged along the axial direction of the thin end, and digital markings set on the sides of some scale lines. The numbers represent the reading values ​​of the scale lines at the corresponding positions. When the glass float is immersed in the solution, the reading of the liquid level position can be obtained by identifying the numbers closest to the liquid level position and the corresponding scale line through distance conversion.

[0028] The existing working glass float meter needs to be calibrated after production is completed. The calibration procedure is based on JJG 42-2023 "Calibration Procedure for Working Glass Float Meters". At least three calibration points are required (for example, 40%, 45%, and 50% solution concentration values). Only after passing the calibration can the glass float meter be put into use as a qualified working glass float meter.

[0029] Reference Figure 1 , Figure 2 and Figure 3 A glass float placement rack 3 is provided in the vertical cabinet 1, and a plurality of vertical slots for the glass floats to be inserted downward are provided on the placement rack 3, with the thick end of the glass float facing downward and the thin end facing upward, so that a plurality of glass floats can be placed side by side at one time. In a calibration process, a standard glass float and several working glass floats to be calibrated should be placed on the placement rack 3.

[0030] A test vessel assembly 4 is arranged adjacent to the placement rack 3. The test vessel assembly 4 includes a plurality of solution cylinders 41 arranged side by side. The solution cylinders 41 are vertical columnar hollow structures and are used to contain test solutions. A plurality of different solution cylinders 41 are used to contain solutions of different concentrations.

[0031] A base is provided below the solution cylinder 41 , and a magnetic stirrer 44 is provided in the base to drive a magnetic block provided at the bottom of the solution cylinder 41 to stir the solution in the cylinder. When the solution starts to be injected into the solution cylinder 41 , the stirring work starts at the same time.

[0032] A horizontal partition 11 is provided in the vertical cabinet 1, and the partition 11 divides the space inside the cabinet into two parts, the upper and lower parts. The placement rack 3 and the solution cylinder 41 are both arranged on the upper side of the partition 11, and two liquid storage barrels 45 are also provided under the partition 11, one of which stores water and the other stores ingredients. The solution can be obtained by mixing the ingredients with water in proportion. A magnetic pump system is also provided on the outside of the liquid storage barrel 45, which is used to pump the liquid in the liquid storage barrel 45 into any one of the solution cylinders 41 above, and each solution cylinder 41 is provided with a flow meter to obtain the solution flow in the cylinder in real time.

[0033] An overflow port 43 is provided on the top of the peripheral side of the solution cylinder 41 for the solution in the solution cylinder 41 to flow out. In this embodiment, the overflow port 43 is provided to control the highest liquid level in the solution cylinder 41 at the height of the overflow port 43 .

[0034] A liquid receiving tank 46 is further disposed at the rear side of the solution cylinder 41 to receive the liquid flowing out of the overflow port 43 . The liquid receiving tank 46 is disposed obliquely and is connected to a waste liquid cylinder at the lower end to recover the waste liquid.

[0035] The solution cylinder 41 is made of transparent material, including but not limited to plastic or glass, and the internal solution level and the glass float can be directly observed through the side wall.

[0036] An upper cover is provided on the top of the solution cylinder 41, and two circular limiting holes 42 are opened on the upper cover. The limiting hole 42 can be used for a single glass float to pass through and be inserted into the solution cylinder 41. By setting two limiting holes 42 on an upper cover, two glass floats can be inserted into a solution cylinder 41 at the same time, which can be a standard glass float and a glass float to be calibrated, so that data comparison is convenient for rapid calibration. The function of the two limiting holes 42 is to separate the two glass floats by a distance, ensure that the two floats are neatly arranged in parallel, avoid collision and entanglement with each other, and affect the calibration.

[0037] A multi-axis manipulator clamping mechanism 6 is also provided in the vertical cabinet 1, including a transverse rail 61 arranged laterally for the manipulator to move laterally and to dispatch the glass float back and forth between the area of ​​the placement rack 3 and the solution cylinder 41; including a vertically arranged lifting rail 62 for realizing the grabbing and lifting of the glass float, including taking and placing the glass float on the placement rack 3 and taking and placing it in the solution cylinder 41, the lifting rail 62 is slidably connected to the transverse rail 61 and can move laterally along the transverse rail 61; including a clamp for performing a clamping function, the clamp is clamped on the top of the thin end of the glass float, the clamp is slidably connected to the lifting rail 62, can be lifted and lowered along the lifting rail 62, and moves laterally on the transverse rail 61 together with the lifting rail 62.

[0038] The clamp includes a rotating motor 64 and two main clamping jaws 63 that are relatively opened and closed. The two jaws are jointly arranged on the bottom output shaft of the rotating motor 64, and can rotate synchronously under the action of the rotating motor 64. When the clamp clamps the glass float, it can drive the glass float to rotate along its axial direction.

[0039] A secondary clamp 65 is also provided on the lower side of the multi-axis manipulator clamping mechanism 6. The secondary clamp 65 can be set on the lifting rail 62. After the clamp clamps the glass float and leaves the placement rack 3 or the solution cylinder 41 upward, and drives the glass float to move horizontally, the secondary clamp 65 is used to clamp the surrounding side of the thick end of the glass float to stabilize the glass float as a whole and prevent the glass float from shaking or swaying during movement and causing breakage at the thin end.

[0040] An image acquisition device 5 is provided at the rear of the solution cylinder 41, which is used to collect images of the interaction between the liquid surface and the glass float when the glass float is placed in the solution cylinder 41. The image acquisition device 5 includes a first camera 51 and a second camera 52. The first camera 51 and the second camera 52 are both arranged on the same mobile platform, and the acquisition directions are both toward the solution cylinder 41. The mobile platform is arranged on a slide rail 53. The length direction of the slide rail 53 is arranged in parallel along the arrangement direction of multiple solution cylinders 41, so that the lateral spacing between the slide rail 53 and each solution cylinder 41 is the same. The mobile platform can move laterally on the slide rail 53 to be able to collect images in each solution cylinder 41. At the same time, an angle adjustment structure is also provided between the first camera 51 and / or the second camera 52 and the mobile platform to adjust the direction and inclination of the camera. The angle adjustment structure can adopt methods including but not limited to connecting the camera with a damping shaft of the mobile platform.

[0041] The first camera 51 is a wide-angle camera that captures a large range and is used to locate the actual position of the glass float and the solution surface, as well as to capture the posture image of the entire glass float. The second camera 52 is a small-field-of-view camera that is used to capture high-definition images of the scale of the glass float and the solution surface position. The positioning of the first camera 51 facilitates the second camera 52 to quickly determine the collection position.

[0042] In order to improve the image acquisition quality of the two cameras, a light source is further provided in the vertical cabinet 1, and the light source includes a background light source 7 and a ring light source.

[0043] Among them, the background light source 7 is arranged on the front side of the solution cylinder 41, and illuminates the solution cylinder 41 so that the solution cylinder 41 is located between the background light source 7 and the image acquisition device 5. The background light source 7 is set to be a square LED panel, and its width is suitable for the width setting of multiple solution cylinders 41, so that it can always serve as the background of the image in the acquired image. When the image is acquired by the first camera 51, the acquired image is mainly used to locate the position of the glass float and the liquid level. Therefore, using the back direction of the background light source 7 to illuminate can make the edge of the glass float and the liquid level position clearer.

[0044] The annular light source is arranged on the surrounding side of the second camera 52 and illuminates the solution cylinder 41. When the second camera 52 is used to collect images, the collected images are mainly used to identify the scale information on the glass float. The scale is facing the second camera 52, so the display of the scale can be clearer by illuminating the front direction with the annular light source; and when the annular light source is illuminated, the background light source 7 can be turned off, and its LED panel can serve as a clean background behind the solution cylinder when turned off.

[0045] A control cabinet is also provided on one side of the vertical cabinet 1, and a control unit 2 is provided in the cabinet. The control cabinet is connected to the vertical cabinet 1 via a data cable or wireless communication, and the control unit 2 is electrically connected to the magnetic pump system, the magnetic stirrer 44, the multi-axis manipulator clamping mechanism 6, and the image acquisition device 5, so that the control unit 2 can control the operation of the magnetic pump system, the magnetic stirrer 44, the multi-axis manipulator clamping mechanism 6, and the image acquisition device 5, and the image information collected by the image acquisition device 5 can be uploaded to the control unit 2 for image processing and analysis.

[0046] When the calibration device is working, a standard glass float and a plurality of working glass floats to be calibrated are first pre-placed in the placement rack 3, and the corresponding ingredients and water are injected into each solution cylinder 41 in turn through the magnetic pump system, and the calibration solutions with different concentration values ​​are fully stirred by the magnetic stirrer 44, wherein the preparation of the calibration solution can use the standard glass float as the preparation standard to accurately prepare the liquid; through the scheduling of the multi-axis manipulator clamping mechanism 6, the standard glass float and any one of the working glass floats to be calibrated are placed in one of the solution cylinders 41, and the image of the entire solution cylinder 41 and the two glass floats is collected by the first camera 51, and the position of the liquid surface in the image is obtained by machine or manual image processing and analysis, and the position of the top of each glass float scale in the field of view and the scale are located. The lateral position of the lower section of the liquid surface in the field of view, and then the enlarged image of the liquid surface is collected by the second camera 52, and the image processing and analysis of each liquid level reading position, the number of the glass float closest to the liquid level reading position and its position are obtained respectively, and then it is judged whether the arc surface of the glass float is the arc surface of the scale line at this time. When any of the above information cannot be recognized, the multi-axis manipulator clamping device can be controlled to clamp the glass float and rotate it by an angle, and the image is collected again. By rotating once or multiple times until all the above information can be recognized, the scale line closest to the liquid surface can be identified according to this information, and the reading indications of the standard glass float and the glass float to be calibrated are calculated respectively, and the reading indications of the two are directly compared to obtain the calibration result of the reading indication of the glass float to be calibrated under the current calibration solution concentration value.

[0047] Among them, multiple glass float meters to be calibrated need to be calibrated in different solution cylinders 41 in solutions of different concentrations;

[0048] In one embodiment, the calibration sequence of multiple glass floats to be calibrated is to select one of the glass floats to be calibrated, complete the calibration in solutions of different concentrations in turn, and then calibrate the next glass float to be calibrated. The calibration sequence of this embodiment effectively simplifies the movement stroke and complexity of the multi-axis manipulator clamping mechanism 6, avoids repeated placement of a glass float to be calibrated on the placement rack 3, and reduces the probability of breakage.

[0049] In another embodiment, the calibration order of multiple glass floats to be calibrated is to complete the calibration of all the glass floats to be calibrated in solutions of the same concentration in turn, and then proceed to calibration in solutions of the next concentration. The calibration order of this embodiment effectively avoids the mixing of solutions of different concentrations caused by the dispatch of the glass floats to be calibrated in solutions of different concentrations, thereby ensuring the stability and accuracy of the concentration of each solution during the calibration process.

[0050] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A glass float gauge calibration device, characterized in that: The calibration vessel assembly (4) includes a plurality of solution cylinders (41) for containing calibration solutions, the upper end of the solution cylinder (41) is provided with an opening for placing a glass float, and an overflow port (43) for the internal solution to flow out is provided at a set height on the peripheral wall of the solution cylinder (41); a placement rack (3) is provided on one side of the calibration vessel assembly (4), and a plurality of slots are provided on the placement rack (3) for inserting the thin end of the glass float upward; a multi-axis manipulator clamping mechanism (6) for adjusting the glass float on the placement rack (3) and the solution cylinder (41); and a camera is provided facing the solution cylinder (41).

2. A glass float gauge calibration device according to claim 1, characterized in that: The number of the solution cylinders (41) is set to three, and they are arranged in a linear array.

3. A glass float gauge calibration device according to claim 1, characterized in that: An upper cover is arranged on the top of the solution cylinder (41), and two limiting holes (42) are provided on the upper cover for inserting a glass float, and the two limiting holes (42) are spaced apart by a set distance.

4. A glass float gauge calibration device according to any one of claims 1 to 3, characterized in that: The solution cylinder (41) is made of transparent material.

5. A glass float gauge calibration device according to claim 1, characterized in that: It also comprises a liquid receiving trough (46), which is arranged below the overflow port (43), the liquid receiving trough (46) is arranged in an inclined manner, and the lower end of the liquid receiving trough (46) is connected to a waste liquid bucket.

6. A glass float gauge calibration device according to claim 1, characterized in that: The multi-axis manipulator clamping mechanism (6) includes a transverse rail (61) arranged horizontally above the placement rack (3) and the solution cylinder (41), a lifting rail (62) is vertically slidably arranged on the transverse rail (61), a rotating motor (64) is slidably arranged on the lifting rail (62), and a main clamping jaw (63) for clamping a glass float is connected to the output shaft of the rotating motor (64).

7. A glass float gauge calibration device according to claim 6, characterized in that: It also includes a secondary clamping jaw (65) for clamping the thick end of the glass float, and the secondary clamping jaw (65) is arranged on the lifting rail (62).

8. A glass float gauge calibration device according to claim 1, characterized in that: The camera comprises a first camera (51) and a second camera (52), wherein the first camera (51) and the second camera (52) are both arranged toward the solution cylinder (41), and further comprises a slide rail (53), wherein a movable platform is slidably arranged on the slide rail (53), wherein the first camera (51) and the second camera (52) are both arranged on the movable platform, and the length direction of the slide rail (53) is arranged along the arrangement direction of the solution cylinder (41).

9. A glass float gauge calibration device according to claim 8, characterized in that: It also comprises a light source, which comprises a background light source (7) and a ring light source respectively arranged on both sides of the solution cylinder (41).

10. A glass float gauge calibration device according to claim 1, characterized in that: A magnetic pump system is arranged below the solution cylinder (41), and the magnetic pump system comprises a liquid storage barrel (45) and a magnetic pump for pumping liquid in the liquid storage barrel (45) into the solution cylinder (41); and further comprises a magnetic stirrer (44) for stirring the solution in the solution cylinder (41), and the magnetic stirrer (44) is arranged at the bottom of the solution cylinder (41).

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