System and method for measuring kinematic viscosity of sample oil

Abstract

The invention discloses a system and a method for measuring kinematic viscosity of sample oil, the system comprises a kinematic viscometer arranged on a workbench, one side of the kinematic viscometer is also provided with a mechanical arm and a reagent bottle rack which are located on the workbench, a reagent bottle is placed in the reagent bottle rack, and the mechanical arm and the reagent bottle rack are arranged on the workbench. A liquid injection head and a gripper are further mounted on the mechanical arm, the gripper and the liquid injection head do not interfere with each other, the kinematic viscometer, the mechanical arm and the reagent bottle rack respectively form independent modules, and an AGV dolly capable of moving back and forth is arranged among the modules. The liquid injection head is connected with the mechanical arm through a liquid injection gun capable of performing piston motion, and the gripper is provided with a clamping jaw for taking and placing a reagent bottle. Automatic equipment is additionally arranged in the front and back flow paths of the kinematic viscosity detector, so that automatic operation of kinematic viscosity detection of the sample oil is realized, the determination flow is highly consistent, the determination efficiency is improved, and the data consistency is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of laboratory automation equipment, and in particular relates to a system and method for measuring the kinematic viscosity of a sample oil. Background Art

[0002] The quality of lubricants used in power plant equipment directly affects the normal operation of power plant equipment. The kinematic viscosity characteristics of lubricants are an important part of lubricant performance testing and a key parameter for measuring their lubrication performance. Correctly selecting and maintaining viscosity grades can significantly extend equipment life and improve energy efficiency.

[0003] Currently, kinematic viscosity testers are often used to test the kinematic viscosity characteristics of lubricating oils. Kinematic viscosity testers are independent instruments. When used in the laboratory, operators need to perform operations such as plugging and unplugging the input tube, injecting sample reagents, and suctioning the vacuum pump during cleaning. Since chemical agents such as petroleum ether are used during use, there are certain safety risks for operators. Manual operation is not only inefficient, but also prone to poor consistency, strong subjectivity, and obvious deviations. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a sample oil kinematic viscosity measurement system and method. Automated equipment is added to the front and back process paths of the kinematic viscosity tester to realize the automated operation of the sample oil kinematic viscosity detection, so that the measurement process is highly consistent, the measurement efficiency is improved, and the consistency of the data is ensured.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A sample oil kinematic viscosity measurement system includes a kinematic viscometer disposed on a workbench, a robotic arm and a reagent bottle rack located on the workbench further disposed on one side of the kinematic viscometer, reagent bottles placed in the reagent bottle rack, an injection head and a gripper mounted on the robotic arm, the gripper and the injection head not interfering with each other, the kinematic viscometer, the robotic arm, and the reagent bottle rack each forming an independent module, an AGV trolley roving between the modules, the injection head connected to the robotic arm via an injection gun capable of piston motion, and the gripper having a gripper for taking and placing reagent bottles;

[0007] Through this embodiment, a liquid injection head and a gripper that do not interfere with each other are set on the robotic arm at the same time, that is, one robotic arm is used to grab different reagent bottles back and forth and directly inject the solutions inside them into the kinematic viscometer, which not only saves the cost of the entire system, but also improves the efficiency of detection.

[0008] In one embodiment, a cover opening and closing mechanism is further provided on one side of the reagent bottle rack, the cover opening and closing mechanism comprising a rotating claw and a clamping position provided on the rotating claw, the rotating claw is located above the workbench, and a driving mechanism connected to the rotating claw is located on the other side of the workbench;

[0009] Through this embodiment, the opening and closing cover mechanism provided on one side of the reagent bottle rack is used in conjunction with the robotic arm to complete the opening and closing cover operation of the reagent bottle during the process of the robotic arm grasping, thereby further improving the efficiency of detection.

[0010] In one embodiment, two rows of different reagent bottles are arranged on the reagent bottle rack.

[0011] In one embodiment, the kinematic viscometer is further provided with a plug-in / pull-out mechanism corresponding to the input tube to open and close the input plug of the input tube.

[0012] In one embodiment, the plug-in mechanism includes a plug-in frame and a motor arranged on the plug-in frame, a screw is provided on the output shaft of the motor, a nut is screwed on the screw, a sleeve is provided on the nut, and the sleeve is provided on the input plug of the input pipe.

[0013] In one embodiment, vertical slots are further provided on both sides of the plug-in frame, and guide columns that fit in the vertical slots are provided on both sides of the nut.

[0014] In one embodiment, the apparatus further comprises a vacuum pump and a vacuum tank disposed on a workbench, wherein the vacuum tank is connected to the vacuum pump and the kinematic viscometer, respectively.

[0015] In one embodiment, a control unit is further included, and the control unit is electrically connected to the kinematic viscometer, the robotic arm, and the plug-in mechanism respectively.

[0016] The present invention also provides a method for measuring the kinematic viscosity of a sample oil, which is based on the above-mentioned system for measuring the kinematic viscosity of a sample oil and comprises the following steps:

[0017] Use the robotic arm to grab the detergent bottle or sample bottle to the opening and closing cover mechanism and open the bottle cap;

[0018] Control the plug-in mechanism to open the input plug of the input pipe;

[0019] Use the robotic arm to draw the medium from the detergent bottle or sample bottle into the input tube and close the input plug;

[0020] The control unit is used to control the kinematic viscometer to perform cleaning or viscosity testing.

[0021] In one embodiment, it further includes:

[0022] After the kinematic viscometer is cleaned, the pipeline of the kinematic viscometer is sucked dry by a vacuum pump.

[0023] The beneficial effects of the present invention are:

[0024] (1) Adding automated equipment to the front and back process paths of the kinematic viscosity tester to realize the automated operation of the kinematic viscosity test of the sample oil, making the measurement process highly consistent, improving the measurement efficiency, and ensuring the consistency of the data.

[0025] (2) The robotic arm is provided with a liquid injection head and a gripper that do not interfere with each other. That is, a robotic arm is used to grab different reagent bottles back and forth and directly inject the solutions inside them into the kinematic viscometer. This not only saves the cost of the entire system, but also improves the efficiency of detection. At the same time, the opening and closing cover mechanism set on one side of the reagent bottle rack is used in conjunction with the robotic arm to complete the opening and closing of the reagent bottle during the process of the robotic arm grabbing, further improving the efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0027] Figure 1 Shows a schematic structural diagram of the present invention;

[0028] Figure 2 A partially enlarged schematic diagram of a reagent bottle rack of the present invention is shown;

[0029] Figure 3 A partially enlarged schematic diagram of the robotic arm of the present invention is shown;

[0030] Figure 4 A schematic structural diagram showing the opening and closing cover mechanism of the present invention is shown;

[0031] Figure 5 A schematic structural diagram showing the opening and closing cover mechanism of the present invention in another direction;

[0032] Figure 6 Shows a schematic structural diagram of the kinematic viscometer of the present invention;

[0033] Figure 7 A partially enlarged structural diagram of the plug-in mechanism is shown;

[0034] In the drawings, like reference numerals are used for like parts, but the drawings are not necessarily true to scale.

[0035] Reference numerals:

[0036] 1-Kinematic viscometer, 2-Workbench, 3-Robot arm, 4-Reagent bottle rack, 5-Reagent bottle, 6-Filling head, 7-Grip, 8-Opening and closing cover mechanism, 9-Clamping position, 10-Rotating clamp, 11-Input tube, 12-Plug-in mechanism, 13-Plug-in rack, 14-Screw, 15-Nut, 16-Pulley, 17-Input plug, 18-Vertical slot, 19-Guide column, 20-Vacuum pump, 21-Vacuum tank, 22-Tip rack. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] The present invention provides a system for measuring the kinematic viscosity of a sample oil. Figure 1 and Figure 2 As shown, the kinematic viscometer 1 is arranged on a workbench 2, and a plurality of automated modules are arranged on the workbench 2, and kinematic viscosity detection is one of them. An AGV trolley (not shown in the figure) is equipped to transfer samples between modules and realize other functions. A robotic arm 3 is installed in front of the kinematic viscometer 1 on the workbench 2. The robotic arm 3 can be a six-axis robotic arm. The operating radius of the robotic arm 3 can effectively operate the kinematic viscometer 1. A reagent bottle rack 4 is set in front of the kinematic viscometer 1 for placing reagent bottles 5. The reagents in the reagent bottles 5 are cleaning agents and oil samples according to the process requirements. Two rows of reagent bottles 5 are set on the reagent bottle rack 4, which are used to place different reagents respectively. A liquid injection head 6 and a gripper 7 are provided on the robotic arm 3. The liquid injection head 6 is realized by a liquid injection gun fixed to the front end of the robotic arm 3. The liquid injection gun realizes liquid extraction and liquid injection in the form of an electric piston. The tips of the injection gun can be provided by a tip rack 22. The tip rack 22 can be set on the work surface 2 to provide supply and recovery of tips. The gripper 7 is set below the injection head 6 and does not interfere with the injection head 6. The gripper 7 uses an electric gripper to take and place the reagent bottle 5;

[0039] It should be noted that in this embodiment, automated equipment is added to the front and rear process paths of the kinematic viscosity tester to realize the automated operation of the kinematic viscosity test of the sample oil, so that the measurement process is highly consistent, the measurement efficiency is improved, and the consistency of the data is ensured. In addition, non-interfering liquid injection heads and grippers are set on the robotic arm at the same time, that is, a robotic arm is used to grab different reagent bottles back and forth while directly injecting the solutions inside them into the kinematic viscometer, which not only saves the cost of the entire system, but also improves the efficiency of the test.

[0040] In one embodiment, Figure 2 、 Figure 4 as well as Figure 5As shown, a cover opening and closing mechanism 8 is provided on one side of the reagent bottle rack 4. The cover opening and closing mechanism 8 includes a clamping position 9 and a rotating clamping claw 10. The gripper 7 on the robotic arm 3 is used to grip the bottle cap. The rotating clamping claw 10 grips the reagent bottle 5 and then rotates to open and close the cover of the reagent bottle 5. The clamping claw of the rotating clamping claw 10 is located above the work surface 2, and the driving mechanism is located below the work surface 2.

[0041] It should be noted that, on the basis of setting up a robotic arm, the opening and closing cover mechanism set on one side of the reagent bottle rack is used in conjunction with the robotic arm to complete the opening and closing cover operations of the reagent bottle during the process of the robotic arm grabbing, thereby further improving the efficiency of detection.

[0042] In one embodiment, Figure 6 and Figure 7 As shown, a plug-in mechanism 12 is provided at the position of the input tube 11 of the kinematic viscometer 1. The plug-in mechanism 12 includes a plug-in frame 13 installed on the kinematic viscometer 1, a motor is provided on the plug-in frame 13, a screw rod 14 is vertically provided on the motor shaft, a nut 15 is screwed on the screw rod 14, a sleeve 16 is provided on the nut 15, and the sleeve 16 is provided on the input plug 17 of the input tube 11. The motor drives the screw rod 14 to rotate, so that the nut 15 drives the sleeve 16 to rise and fall, thereby realizing the opening and closing of the input plug 17 of the input tube 11. Vertical slots 18 are provided on both sides of the plug-in frame 13, and guide posts 19 are provided on both sides of the nut 15. The guide posts 19 are fitted in the vertical slots 18.

[0043] It should be noted that the applicant found that the input plug 17 on the input tube 11 needs to be opened and closed frequently during the detection process, and its position needs to be relatively precise, which affects its automation development. In this embodiment, an insertion and extraction mechanism 12 is set along the position of the input tube 11 on the kinematic viscometer 1, and its guide column 19 cooperates with the vertical slot 18. The motor drives the screw 14 to rotate, so that the nut 15 drives the sleeve 16 to rise and fall, ensuring the stability of the process of automatically inserting and removing the input tube 11, and avoiding the deviation of the position of the input tube 11 and affecting the automated operation.

[0044] In one embodiment, Figure 1 As shown, a vacuum pump 20 and a vacuum tank 21 are provided at the rear of the kinematic viscometer 1. The vacuum tank 21 is connected to the vacuum pump 20. The vacuum tank 21 is connected to the pipeline of the kinematic viscometer 1 through a pipeline (not shown in the figure) for vacuuming.

[0045] In one embodiment, the kinematic viscometer 1, the robotic arm, the cover opening and closing mechanism 8, the plugging and unplugging mechanism 12, and the vacuum tank 21 are all controlled by a control unit. The operating bottom layer of the kinematic viscometer 1 is connected to the control unit and communicates with the kinematic viscometer 1 through the host computer.

[0046] Specifically, the control unit controls the kinematic viscometer 1, performing operations equivalent to those performed by the user on the panel, such as start-up and shutdown, parameter setting, function operation, data feedback, etc. The control unit controls the start-up, shutdown, positioning, travel, and other functions and parameter settings of the robotic arm, the lid opening and closing mechanism 8, the plugging and unplugging mechanism 12, and the vacuum tank 21.

[0047] The control unit controls each mechanism module, including the deployment of the AGV, to complete reagent input, opening and closing the reagent bottle 5 lid, liquid extraction and injection, and opening and closing the input plug 17 of the kinematic viscometer 1, thereby controlling the kinematic viscometer 1 process and realizing the kinematic viscosity detection of the oil sample.

[0048] In one embodiment, the present invention further provides a method for measuring the kinematic viscosity of a sample oil, comprising the following steps:

[0049] Use the robotic arm to grab the detergent bottle or sample bottle to the opening and closing cover mechanism and open the bottle cap;

[0050] Control the plug-in mechanism to open the input plug of the input pipe;

[0051] Use the robotic arm to draw the medium from the detergent bottle or sample bottle into the input tube and close the input plug;

[0052] Use the control unit to control the kinematic viscometer to clean or perform viscosity testing;

[0053] It should be noted that each time a viscosity test is performed, a cleaning process must be performed first to ensure accuracy, or after the test is completed on the same day, a cleaning process must be performed so that the test work can be carried out quickly the next day;

[0054] When entering the kinematic viscosity test process, the reagent bottles 5 of the cleaning agent and sample are first delivered to the reagent bottle rack 4 by the AGV, and then the cleaning process and the test process are carried out;

[0055] The cleaning process includes the following steps:

[0056] Control the robotic arm 3 to grab the detergent bottle and place it on the cover opening and closing mechanism 8. Control the cover opening and closing mechanism 8 and the robotic arm 3 to cooperate to open the detergent bottle cap. Then control the plugging and unplugging mechanism 12 to open the input plug 17 of the input tube 11, exposing the liquid injection port of the input tube 11. Depending on the liquid injection method and the characteristics of the detergent, the pipelines of different kinematic viscometers 1 may be different.

[0057] The robot arm 3 is controlled to draw cleaning fluid from the cleaning agent bottle into the input pipe 11 and close the input plug 17. The control unit then operates the viscometer 1 to activate its cleaning function and begin the cleaning process. Finally, the vacuum pump 20 is used to dry the viscometer 1 pipeline. Specifically, the tube of the vacuum tank 21 is inserted into the input pipe 11 to draw or dry the internal liquid through negative pressure.

[0058] After the cleaning is completed, the robot arm 3 closes the lid of the cleaning agent bottle and returns to the reagent bottle rack 4. After completing the above cleaning work, the oil sample detection process is carried out. After the kinematic viscometer is controlled to be cleaned, the pipeline of the kinematic viscometer is dried by the vacuum pump 20;

[0059] The previous steps are essentially the same as the cleaning steps. The robotic arm 3 is controlled to grab the sample bottle and place it on the lid opening and closing mechanism 8. The lid opening and closing mechanism 8 and the robotic arm 3 are controlled to cooperate to open the sample bottle cap. The plugging and unplugging mechanism 12 is then controlled to open the input plug 17 of the input tube 11. The robotic arm 3 draws the sample reagent from the sample bottle into the input tube 11 and closes the sample bottle cap, sealing the input plug 17.

[0060] The control unit controls the kinematic viscometer 1 to perform viscosity testing. The control unit receives the detection structure of the kinematic viscometer 1 and completes the detection process. The data generated after the detection is fed back by the kinematic viscometer 1 to the control unit and then sent to the host computer for storage for subsequent analysis and processing.

[0061] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0062] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. A system for measuring the kinematic viscosity of a sample oil, characterized in that: It includes a kinematic viscometer arranged on a workbench, and a robotic arm and a reagent bottle rack located on the workbench are also arranged on one side of the kinematic viscometer. Reagent bottles are placed in the reagent bottle rack. The robotic arm is also equipped with an injection head and a gripper. The gripper and the injection head do not interfere with each other. The kinematic viscometer, the robotic arm and the reagent bottle rack respectively form independent modules, and there is an AGV trolley that travels between the modules. The injection head is connected to the robotic arm through an injection gun that can perform piston motion, and the gripper has a clamping claw for taking and placing reagent bottles.

2. A sample oil kinematic viscosity measuring system according to claim 1, characterized in that: A cover opening and closing mechanism is also provided on one side of the reagent bottle rack. The cover opening and closing mechanism includes a rotating claw and a clamping position provided on the rotating claw. The rotating claw is located above the workbench, and a driving mechanism connected to the rotating claw is located on the other side of the workbench.

3. A sample oil kinematic viscosity measuring system according to claim 1, characterized in that: Two rows of different reagent bottles are arranged on the reagent bottle rack.

4. A sample oil kinematic viscosity measuring system according to claim 1, characterized in that: The kinematic viscometer is also provided with a plug-in / pull-out mechanism corresponding to the input tube to open and close the input plug of the input tube.

5. A sample oil kinematic viscosity measuring system according to claim 4, characterized in that: The plug-in mechanism includes a plug-in frame and a motor arranged on the plug-in frame. A screw is arranged on the output shaft of the motor. A nut is screwed on the screw. A sleeve is arranged on the nut. The sleeve is arranged on the input plug of the input pipe.

6. A sample oil kinematic viscosity measuring system according to claim 5, characterized in that: Vertical slots are further provided on both sides of the plug-in rack, and guide columns matched in the vertical slots are provided on both sides of the nut.

7. A sample oil kinematic viscosity measuring system according to claim 1, characterized in that: It also includes a vacuum pump and a vacuum tank arranged on the workbench, and the vacuum tank is connected to the vacuum pump and the kinematic viscometer respectively.

8. A sample oil kinematic viscosity measuring system according to claim 4, characterized in that: It also includes a control unit, which is electrically connected to the kinematic viscometer, the robotic arm, and the plug-in mechanism respectively.

9. A method for measuring the kinematic viscosity of a sample oil, based on the system for measuring the kinematic viscosity of a sample oil according to any one of claims 1 to 8, characterized in that: The steps include: Use the robotic arm to grab the detergent bottle or sample bottle to the opening and closing cover mechanism and open the bottle cap; Control the plug-in mechanism to open the input plug of the input pipe; Use the robotic arm to draw the medium from the detergent bottle or sample bottle into the input tube and close the input plug; The control unit is used to control the kinematic viscometer to perform cleaning or viscosity testing.

10. The method for measuring the kinematic viscosity of a sample oil according to claim 9, wherein: Also includes: After the kinematic viscometer is cleaned, the pipeline of the kinematic viscometer is sucked dry by a vacuum pump.

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