A kinematic viscosity automatic measuring device and method based on a multi-axis coordination unit

Abstract

The application relates to the technical field of power oil detection, and discloses a kinematic viscosity automatic measuring device and method based on a multi-axis coordination unit, which comprises a kinematic viscosity measuring instrument and an automatic sampling device; the automatic sampling device comprises a coordination unit, a sample stage, a cover opening and closing device, a sampling needle device, and a connecting pipeline and a syringe pump; the sampling needle and the syringe pump are connected through the connecting pipeline; the sample stage and the syringe pump are arranged below the coordination unit; the sample stage is driven to move back and forth by a Y-axis; the X-axis of the coordination unit drives the cover opening and closing device and the sampling needle to move left and right; the sampling needle is sucked and pushed by the syringe pump to realize quantitative suction and injection of an oil sample.

Description

Technical Field

[0001] This invention relates to the field of power oil testing technology, and in particular to an automatic kinematic viscosity measuring device and method based on a multi-axis coordination unit. Background Technology

[0002] In power systems, the kinematic viscosity of insulating oil and turbine oil is a core indicator for evaluating the fluidity, lubricity, and performance of these oils. Currently, the most common methods for testing the kinematic viscosity of insulating and turbine oils are capillary viscometer and rotational viscometer methods. While these kinematic viscometers meet basic accuracy requirements, processes such as sample injection, data recording, and post-test cleaning and drying all rely on manual operation. For example, after manually preparing and numbering each sample, the oil sample is manually injected into the kinematic viscometer, and the temperature, rotation speed, and other parameters are adjusted and initialized. After each sample test, the data is manually recorded, and the oil is automatically cleaned, dried, and then re-injected into the next set of samples. This process is repeated until all samples have been tested. The entire process, including sample changing, cleaning, and data recording, requires manual intervention.

[0003] Existing measuring instruments lack automatic sample changing and batch processing capabilities. In batch testing scenarios, manual operation leads to high labor intensity, long testing time, and is prone to introducing human error that affects data consistency, making continuous high-throughput testing impossible. To promote the construction of smart laboratories for power oil and address the inherent shortcomings of existing testing methods, such as low automation, cumbersome manual sample changing, and inability to achieve high-throughput testing, research on the automation of kinematic viscosity testing is needed. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an automatic kinematic viscosity measuring device and method based on a multi-axis coordination unit, solving the issues of low automation, cumbersome manual sample changing, low detection efficiency, and inability to achieve high-throughput detection in existing insulating oil and turbine oil kinematic viscosity testing.

[0005] This invention is achieved through the following scheme: An automatic kinematic viscosity measuring device based on a multi-axis coordinating unit includes: Kinematic viscosity meter and automatic sampler; The automatic sample injection device includes a coordination unit, a sample position, a cap opening and closing device, and a sample injection needle device, as well as connecting tubing and an injection pump; the sample injection needle and the injection pump are connected via connecting tubing. The sample position and the injection pump are both located below the coordination unit; the sample position is driven to move back and forth by the Y-axis; the coordination unit also has Z1 and Z2 axes arranged side by side on the X-axis, and the X-axis drives the Z1 and Z2 axes to move left and right; the Z1 and Z2 axes drive the switch cover device and the injection needle device to move up and down.

[0006] Furthermore, the cover opening and closing device includes an automatic cover opening and closing gripper mounted at the end of the Z1 axis; the automatic injection needle device includes an injection needle mounted at the end of the Z2 axis.

[0007] Furthermore, the central control system is electrically connected to and controls the kinematic viscosity meter, coordination unit, sample position, opening and closing cover device, injection needle device, and injection pump, and controls the injection needle to perform suction and push actions through the injection pump to achieve quantitative absorption and injection of oil sample.

[0008] Furthermore, a carrier is set on the Y-axis, with sampling and cleaning stations on the carrier.

[0009] Furthermore, the cleaning station is used to place containers containing cleaning agents. The central control system controls the injection pump and injection needle to perform aspiration and evacuation cycles at the cleaning station to clean the connecting tubing and injection needle.

[0010] Furthermore, it also includes safety warning lights connected to the central control system. The central control system controls the on / off state of the safety warning lights according to a preset program to indicate the initialization, standby, measurement, or completion status of the device.

[0011] An automatic method for measuring kinematic viscosity, employing an automatic kinematic viscosity measuring device based on a multi-axis coordinated unit, includes the following steps: S1: The central control system sends an initialization command to the kinematic viscosity meter, starts and calibrates the constant temperature bath, and initializes the photoelectric sensor and timing module at the same time. S2: Place the sample cup to be tested on the carrier at the sample position. The central control system controls the Y-axis to move the carrier and position the first sample cup to be tested to the preset sampling position. S3: The central control system control coordination unit drives the automatic opening and closing lid gripper to the top of the first sample cup, controls Z1 to move down to grip and remove the cup lid, and then Z1 moves up to complete the opening of the lid; S4: The central control system control coordination unit drives the injection needle to move above the opened sample cup, controls the Z2 axis to move down to immerse the needle tip into the liquid surface at a preset depth, and starts the injection pump to extract the set volume of oil sample in reverse. S5: The central control system control and coordination unit transfers the injection needle device carrying the oil sample to the injection port of the kinematic viscosity meter, controls the Z2 axis to move downward to insert the injection needle into the injection port, and starts the injection pump to push the oil sample into the kinematic viscosity meter in the forward direction. S6: The central control system sends a start measurement command to the kinematic viscosity meter, and the kinematic viscosity meter executes the capillary viscosity measurement process. S7: The central control system control coordination unit moves the injection needle to the top of the cleaning station, controls the Z2 axis to move down to immerse the needle tip in the cleaning agent, and controls the injection pump to perform suction and emptying circulation to clean the tubing. S8: The central control system controls the automatic opening and closing gripper to close the lid of the tested sample cup and controls the Y-axis to move the next sample cup to be tested. Repeat steps S3 to S7 until all samples are tested.

[0012] Furthermore, steps S6 and S7 are executed simultaneously.

[0013] Furthermore, in step S7, the injection pump performs multiple suction and evacuation cycles, causing the cleaning agent to form turbulent cleaning within the connecting pipeline, and the waste liquid is discharged into a dedicated waste liquid cup.

[0014] Furthermore, after step S1, the central control system controls the safety warning light to switch to standby indication state; in step S6, the central control system controls the safety warning light to switch to measurement indication state; after step S8, the central control system controls the safety warning light to switch to completion indication state.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By replacing manual labor with a multi-axis coordination unit, the entire sample change process—including waste oil disposal, viscometer cleaning, and new sample injection—is automatically completed after a single test. Combined with the instrument's core testing components, this enables continuous automatic testing of multiple samples. The multi-axis coordination unit autonomously completes sample change and auxiliary operations according to a preset program, eliminating the need for continuous monitoring and dedicated personnel, effectively reducing manpower. The multi-axis coordination unit's sample change process is standardized and rapid, avoiding the tediousness and operational errors of manual sample change, achieving high-throughput batch testing, and improving the overall efficiency of kinematic viscosity testing for power-related oils. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the fully automated kinematic viscosity measuring device based on a multi-axis coordination unit according to the present invention; Figure 2 This is a schematic diagram of the sample position of the present invention; Figure 3 This is a schematic diagram of the multi-axis coordination unit of the transfer unit of the present invention; Figure label: 1-Kinematic viscometer; 2-Warning light; 3-Coordination unit; 4-Sample position; 5-Connecting tubing; 6-Automatic sample feeder; 7-Injection needle; 8-X-axis; 10-Z1-axis; 11-Z2-axis; 12-Z3-axis; 14-Cover clamp; 15-Y-axis; 17-Sample cup; 18-Support frame; 19-Injection pump. Detailed Implementation

[0017] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0018] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0021] like Figures 1-3 As shown, this embodiment provides an automatic kinematic viscosity measuring device based on a multi-axis coordination unit, including: a kinematic viscometer 1 and an automatic sample injection device 6; the automatic sample injection device 6 includes a coordination unit 3, a sample position 4, an automatic cover opening and closing device, and an automatic injection needle device; the coordination unit 3 drives the cover opening and closing device and the injection needle device to operate. A central control system connects to and controls the kinematic viscometer 1, the coordination unit 3, the sample position, the cover opening and closing device, and the injection needle device.

[0022] Specifically, the automatic sample feeding device 6 includes a coordination unit 3, which includes an X-axis 8, a Z1-axis 10, a Z2-axis 11, and a Z3-axis. The cover opening and closing device includes a cover opening and closing gripper 14 installed at the end of the Z1-axis 10. The injection needle device includes an injection needle installed at the end of the Z2-axis 11. The sample position 4 includes a Y-axis 15 and a carrier 18. The carrier 18 is equipped with a sampling station and a cleaning station. The Z3-axis is used for auxiliary positioning and serves as a coordination and transfer unit responsible for the trajectory travel within the device. The device adopts a gantry-type X-axis combined with multiple Z-axis structures, resulting in high space utilization.

[0023] The kinematic viscometer 1 is connected to the injection needle via connecting tubing 5. The connecting tubing connects to the injection pump and the kinematic viscometer. The injection pump is located on the connecting tubing, and the central control system controls the injection pump to perform suction and push actions, enabling quantitative aspiration and injection of the oil sample from the injection needle. The cleaning station is used to place a container filled with cleaning agent. The central control system controls the injection pump and injection needle to perform suction and evacuation cycles at the cleaning station to clean the connecting tubing 5 and the injection needle.

[0024] The device also includes a safety warning light connected to a central control system. The central control system controls the on / off state of the safety warning light according to a preset program to indicate the initialization, standby, measurement, or completion status of the device.

[0025] This embodiment provides an automatic method for measuring kinematic viscosity. Based on the device described in the above embodiment, the specific operating procedure is as follows: Step 1: The central control system sends an initialization command to the kinematic viscosity meter 1, starts and calibrates the constant temperature bath to the target test temperature, initializes the photoelectric sensor and high-precision timing module, and performs an instrument self-test. After the self-test passes, the control safety warning light switches to the standby indication state, for example, a flashing green indicator shows that the system is in standby ready state.

[0026] Step 2: The operator places multiple sample cups 17 containing the oil samples to be tested and containers containing cleaning agents on the carrier 18 at sample position 4 in a preset order. The Y-axis 15 drives the carrier 18 to move horizontally according to the control command of the central control system, moving the sample cups 17 to be tested to the sampling position, waiting for the sampling operation.

[0027] Step 3: According to the test sequence, the central control system controls the coordination unit 3 to drive the X-axis 8 to move horizontally above the target sample cup 17, while the Z1 axis 10 carries the lid-opening gripper 14 vertically downward to a preset height. The gripper 14 performs a closing action to hold the cup lid, and then the Z1 axis 10 moves upward to complete the opening. After opening, the gripper 14 carries the cup lid and moves horizontally to a avoidance position to hover, avoiding interference with subsequent operations.

[0028] Step 4: After opening the cap, the coordination unit 3 moves the injection needle installed at the end of the Z2 axis 11 to above the center of the opened sample cup 17. The Z2 axis 11 descends until the needle tip is immersed to a preset depth below the liquid surface. At this time, the central control system starts the injection pump 19 to draw a set volume of oil sample in reverse. The oil sample enters the injection needle and tubing system through the connecting pipe 5.

[0029] Step 5: After sampling, the Z2 axis 11 moves upward to lift the injection needle out of the sample cup. Then, the coordination unit 3 plans an interference-free path to transport the injection needle to directly above the capillary inlet of the kinematic viscometer 1. The Z2 axis 11 moves downward again to insert the injection needle into the inlet, and the injection pump 19 switches to forward push mode to inject the oil sample into the capillary.

[0030] Step Six: After the oil sample is injected, the Z2 axis 11 drives the injection needle to rise and exit the injection port. The central control system sends a start measurement command to the kinematic viscometer 1, and the instrument automatically executes the capillary viscosity measurement procedure. During the measurement process, the central control system controls the safety warning light to switch to the measurement indication state, such as a solid yellow light indicating that the system is in a critical measurement stage. The measurement status is monitored in real time, and if any abnormal flow or temperature fluctuation exceeds the threshold, an alarm or retest logic is triggered.

[0031] Step 7: While the kinematic viscometer 1 is performing the measurement, the central control system's coordination unit 3 moves the injection needle to the cleaning station above the cleaning station, where a cleaning solvent cup is stored. The Z2 axis 11 descends, immersing the needle tip in the cleaning agent. The injection pump 19 performs multiple suction and emptying cycles, creating turbulent cleaning within the connecting pipe 5. Waste liquid is discharged into a dedicated waste liquid cup. After cleaning, the coordination unit 3 controls the cap clamp 14 to return, performing a cap-closing operation on the measured sample cup.

[0032] Step 8: The central control system updates the test sequence, controls the movement of sample position 4 along the Y-axis 15, and positions the next sample cup to be tested at the sampling station.

[0033] The system automatically repeats steps three through eight until all sample tests are completed. After all tests are finished, safety warning light 2 switches to a completion indication state, such as a solid green light indicating task completion. Steps six and seven can be performed simultaneously.

[0034] The automatic sample introduction device of this invention, connected to a kinematic viscometer, enables automatic sample introduction and automatic cleaning. A programmable continuous action sequence, led by a coordination unit, allows for parallel processing of cap opening and sample introduction, as well as measurement and cleaning. A horizontal moving axis on the sample holder facilitates automatic sample positioning and integration with external automation systems. The central control system coordinates the timing and logical judgments of each unit according to a preset program, achieving fully unmanned operation from sample loading, cap opening, precise quantitative sampling, automatic sample introduction, viscosity measurement, cleaning to result output.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic kinematic viscosity measuring device based on a multi-axis coordinating unit, characterized in that, include: Kinematic viscosity meter (1) and automatic sample feeding device (6); The automatic sample injection device (6) includes a coordination unit (3), a sample position (4), a cover opening and closing device, and a sample injection needle device, as well as a connecting line (5) and an injection pump (19); the sample injection needle (7) and the injection pump (19) are connected through the connecting line (5); The sample position (4) and the injection pump are both located below the coordination unit (3); the sample position (4) is driven to move back and forth by the Y-axis (15); the coordination unit (3) also has Z1 axis (10) and Z2 axis (11) arranged side by side on the X-axis (8), and the X-axis (8) drives the Z1 axis (10) and Z2 axis (11) to move left and right; the Z1 axis (10) and Z2 axis (11) drive the opening and closing cover device and the injection needle device to move up and down.

2. The automatic kinematic viscosity measuring device based on a multi-axis coordination unit according to claim 1, characterized in that, The cover opening and closing device includes an automatic cover opening and closing gripper (14) mounted at the end of the Z1 axis (10); the automatic injection needle device includes an injection needle mounted at the end of the Z2 axis (11).

3. The automatic kinematic viscosity measuring device based on a multi-axis coordination unit according to claim 2, characterized in that, The central control system is electrically connected to and controls the kinematic viscosity meter (1), the coordination unit (3), the sample position (4), the opening and closing cover device, the injection needle device, and the injection pump (19). It controls the injection needle to perform suction and push actions through the injection pump (19) to achieve quantitative absorption and injection of oil samples.

4. The automatic kinematic viscosity measuring device based on a multi-axis coordination unit according to claim 3, characterized in that, A carrier (18) is provided on the Y-axis (15), and a sampling station and a cleaning station are provided on the carrier (18).

5. The automatic kinematic viscosity measuring device based on a multi-axis coordination unit according to claim 4, characterized in that, The cleaning station is used to place containers containing cleaning agents. The central control system controls the injection pump and the injection needle to perform aspiration and evacuation cycles at the cleaning station to clean the connecting tubing (5) and the injection needle.

6. The automatic kinematic viscosity measuring device based on a multi-axis coordination unit according to claim 1, characterized in that, It also includes a safety warning light connected to a central control system, which controls the on / off state of the safety warning light according to a preset program to indicate the initialization, standby, measurement, or completion status of the device.

7. An automatic method for measuring kinematic viscosity, employing the automatic kinematic viscosity measuring device based on a multi-axis coordinating unit as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: The central control system sends an initialization command to the kinematic viscosity meter to start and calibrate the constant temperature bath, and at the same time initializes the photoelectric sensor and timing module. S2: Place the sample cup (17) to be tested on the carrier (18) of the sample position (4), and the central control system controls the Y-axis (15) to move the carrier (18) to position the first sample cup (17) to be tested to the preset sampling position. S3: The central control system control coordination unit (3) drives the automatic opening and closing cover gripper (14) to the top of the first sample cup (17), controls the Z1 axis (10) to move down to grip and remove the cup cover, and then the Z1 axis (10) moves up to complete the opening of the cover; S4: The central control system controls the coordination unit (3) to drive the injection needle to move above the opened sample cup (17), controls the Z2 axis (11) to move downward to immerse the needle tip into the liquid surface at a preset depth, and starts the injection pump to extract the set volume of oil sample in reverse. S5: The central control system controls the coordination unit (3) to transfer the injection needle device carrying the oil sample to the injection port of the kinematic viscosity meter (1), controls the Z2 axis (11) to move downward to insert the injection needle into the injection port, and starts the injection pump to push the oil sample into the kinematic viscosity meter (1) in the forward direction. S6: The central control system sends a start measurement command to the kinematic viscosity meter (1), and the kinematic viscosity meter executes the capillary viscosity measurement process; S7: The central control system controls the coordination unit (3) to move the injection needle above the cleaning station, controls the Z2 axis (11) to move downward to immerse the needle tip in the cleaning agent, and controls the injection pump to perform suction and emptying circulation to clean the pipeline. S8: The central control system controls the automatic opening and closing gripper (14) to perform the closing operation on the tested sample cup (17), and controls the Y-axis (15) to move the next sample cup to be tested, repeating steps S3 to S7 until all sample tests are completed.

8. The automatic method for determining kinematic viscosity according to claim 7, characterized in that, Steps S6 and S7 are executed simultaneously.

9. The automatic method for determining kinematic viscosity according to claim 8, characterized in that, In step S7, the injection pump performs multiple suction and evacuation cycles, causing the cleaning agent to form turbulent cleaning in the connecting pipe (5), and the waste liquid is discharged into a dedicated waste liquid cup.

10. The automatic method for determining kinematic viscosity according to claim 9, characterized in that, After step S1, the central control system controls the safety warning light to switch to standby indication state; in step S6, the central control system controls the safety warning light to switch to measurement indication state; after step S8, the central control system controls the safety warning light to switch to completion indication state.

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