An automated demulsification testing device

Abstract

This utility model discloses an automatic sample-feeding demulsification testing device, including a housing, a control system, a constant-temperature water bath, a transfer and positioning device, and a mixture stirring device. The constant-temperature water bath is equipped with a constant-temperature water bath, a heating rod, and a stirrer to provide a constant-temperature environment. The transfer and positioning device automatically positions the measuring cylinder via a sliding guide rail and an optical coupler. The mixture stirring device stirs the oil-water mixture using a paddle lift and a stirring motor. This device can automatically control the heating of the constant-temperature water bath, the positioning of the measuring cylinder, the stirring, and the testing process, sequentially performing demulsification tests on oil samples in multiple measuring cylinders. It is easy to operate, has high measurement accuracy, and effectively improves the automation level and work efficiency of demulsification testing.

Description

Technical Field

[0001] This utility model relates to the field of petroleum product testing instruments, specifically to a demulsification testing device capable of automatic sample injection. Background Technology

[0002] In the process of oil quality testing, demulsification performance is one of the important indicators for evaluating the performance of lubricating oils, hydraulic oils, and other oils. Traditional demulsification testers generally rely on manual operation when testing multiple samples. This means that after each sample test, the operator must manually change the measuring cylinder containing the sample to the testing position in the constant temperature water bath. This method has many drawbacks. On the one hand, frequent manual sample changes easily introduce operational errors, leading to inconsistent testing conditions for different samples and affecting the accuracy and repeatability of the test results. On the other hand, manual operation is inefficient, consuming significant manpower and time costs, and cannot meet the needs of rapid batch sample testing. Existing automated demulsification testers often use complex robotic arms or multi-station turntable structures for sample switching, resulting in complex structures, high manufacturing costs, poor operational stability, and difficult maintenance. Therefore, there is a need to design a simple, precisely controlled, and stable automated demulsification testing device to solve the aforementioned problems of existing technologies. Summary of the Invention

[0003] This utility model addresses the aforementioned shortcomings of existing technologies by providing an automatic sample injection demulsification testing device, comprising: a housing, a constant temperature water bath, a control system, a transfer and positioning device, and a mixing device. The constant temperature water bath includes a U-shaped heating rod, a measuring cylinder support frame, a measuring cylinder fixing ring, an underwater stirrer, a constant temperature water bath, a constant temperature water bath cover, and a constant temperature water bath support. The transfer and positioning device includes a slide guide rail, a slide transport platform, an optical coupler bracket, a limiting optical coupler, a detection optical coupler, a limiting optical coupler trigger rod, and a detection optical coupler trigger rod. The mixing device includes impellers, an impeller stirring motor, and an impeller lift.

[0004] The constant-temperature water bath is made of high-transmittance, heat-resistant glass and is secured to the bathtub lid and bathtub support by four stainless steel double-threaded posts. The measuring cylinder support frame is fixedly connected to the bathtub lid and suspended inside the bathtub. The measuring cylinder fixing ring is installed on the bathtub lid. The measuring cylinder support frame and the measuring cylinder fixing ring work together to securely hold the measuring cylinder containing the oil-water mixture sample, ensuring that the measuring cylinder will not shift due to external forces and that the sample is completely submerged in the water within the bathtub, placing it within the uniform water flow area generated by the underwater stirrer, thus ensuring uniform heating of the sample. The U-shaped heating rod passes through the bathtub lid and is inserted into the bathtub to heat the water, raising and maintaining the water temperature to accelerate the oil-water separation process. There are two underwater stirrers, which are installed and fixed on both sides of the bottom of the constant temperature water bath. When the U-shaped heating rod heats the water, the underwater stirrer is responsible for stirring the heated water to promote the uniform distribution of heat in the water and ensure that the temperature of the entire water environment where the sample is located is consistent, so as to avoid local overheating or uneven temperature affecting the measurement results.

[0005] The sliding stage in the transfer positioning device is responsible for supporting, installing, and moving the entire constant temperature water bath device. The movement of the sliding stage allows for precise movement of the measuring cylinder containing the sample to be measured within the constant temperature water bath to the designated position. The optical coupler bracket, limiting optical coupler, detection optical coupler, and their trigger rod constitute the positioning system. The optical coupler bracket is used to fix the limiting and detection optical couplers. The limiting optical coupler is used to set the starting and ending positions of the sliding stage movement, preventing it from exceeding the range. The detection optical coupler is used to confirm whether the sliding stage has accurately reached the preset measurement position. The control system precisely controls the movement of the sliding stage based on the signals from the optical couplers, ensuring accurate positioning at each step.

[0006] The impeller motor drives the impeller to rotate, thoroughly stirring the oil-water mixture in the measuring cylinder and accelerating the formation of a uniform emulsion system. The impeller lift can, as needed, immerse the impeller into the measuring cylinder to stir the oil-water sample to be tested and accelerate emulsification, or remove the impeller from the measuring cylinder after emulsification to avoid interference when observing the demulsification process.

[0007] The control system is responsible for coordinating and controlling the operation of each component according to a preset program, accurately managing the temperature in the constant temperature bath, the lifting and stirring of the paddles, the transfer and positioning of the slide, and the storage of the measurement results, thus realizing the automation and standardization of the entire testing process.

[0008] In summary, this device effectively solves the problems of frequent sample changes in traditional processes that easily introduce operational errors, leading to inconsistent detection conditions for different samples and affecting the accuracy and repeatability of detection results. At the same time, it improves upon the existing demulsification testers, which suffer from complex structural design, high manufacturing costs, poor operational stability, and difficult maintenance. It is a more practical and efficient automatic sample feeding demulsification test device. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0010] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0011] Figure 2 This is a schematic diagram of the constant temperature water device according to an embodiment of the present invention.

[0012] Figure 3 This is a schematic diagram of the transfer positioning device according to an embodiment of the present invention.

[0013] Figure 4 This is a schematic diagram of the mixing device structure according to an embodiment of the present invention.

[0014] Among them, 1. Housing, 2. Control system, 3. Constant temperature water device, 4. Transfer and positioning device, 5. Mixing liquid stirring device, 301. Constant temperature water bath cover, 302. Constant temperature water bath, 303. Constant temperature water bath support, 304. Measuring cylinder fixing ring, 305. Measuring cylinder support frame, 306. U-shaped heating rod, 307. Underwater stirrer, 308. End point limit optical coupler trigger rod, 309. Start point limit optical coupler trigger rod, 310. Detection optical coupler trigger rod, 401. Slide table transport platform, 402. Slide table guide rail, 403. Optical coupler bracket, 404. End point limit optical coupler, 405. Detection optical coupler, 406. Start point limit optical coupler, 501. Paddle lift, 502. Paddle stirring motor, 503. Paddle. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention, and the present invention is not limited to the specific embodiments disclosed below.

[0016] Please see Figure 1 , Figure 2, Figure 3 , Figure 4 This utility model provides an automatic sample injection demulsification testing device, comprising: a housing 1, a control system 2, a constant temperature water bath device 3, a transfer and positioning device 4, and a mixing device 5. The constant temperature water bath device 3 includes: a constant temperature water bath cover 301, a constant temperature water bath 302, a constant temperature water bath support 303, a measuring cylinder fixing ring 304, a measuring cylinder support frame 305, a U-shaped heating rod 306, an underwater stirrer 307, an endpoint limit optical coupler trigger rod 308, a starting limit optical coupler trigger rod 309, and a detection optical coupler trigger rod 310. The transfer and positioning device 4 includes: a sliding table transport platform 401, a sliding table guide rail 402, an optical coupler bracket 403, an endpoint limit optical coupler 404, a detection optical coupler 405, and a starting limit optical coupler 406. The mixing device 5 includes: a paddle lift 501, a paddle stirring motor 502, and paddles 503.

[0017] After the experiment begins, the experimenter uses the control system 2 to activate the U-shaped heating rod 306 and the underwater stirrer 307 to uniformly heat the water in the constant temperature bath 302 to 54℃±1℃ and maintain it constant. Then, 40ml of purified water and 40ml of oil sample are added to three clean and dry 100ml graduated cylinders to the 80ml mark. The three graduated cylinders are then placed into the graduated cylinder support frame 305 suspended in the constant temperature bath 302 through the three sample inlets on the constant temperature bath cover 301, and the three graduated cylinders are clamped and fixed in place with the graduated cylinder fixing ring 304. After the measuring cylinder is installed, the control system 2 controls the slide platform 401 to carry the constant temperature water device 3 and move along the slide guide rail 402 in a preset direction and distance. When the slide platform 401 sends the mouth of the first measuring cylinder to the underside of the paddle, the detection optical coupler trigger rod 310 corresponding to the first measuring cylinder also reaches the detection optical coupler 405. The detection optical coupler 405 transmits the signal to the control system 2, and the control system 2 immediately stops the slide operation.

[0018] Next, the control system 2 lowers the paddle lift 501 a preset distance, inserting the paddle 503 into the first measuring cylinder. The paddle 503 is lowered to 6mm from the bottom of the measuring cylinder and left to stand at a constant temperature for 20 minutes to ensure the temperature of the measuring cylinder, the oil-water mixture, and the paddle 503 is consistent with the temperature of the water in the constant temperature bath 302. Once the temperatures are consistent, the control system 2 starts the paddle stirring motor 502, which drives the paddle 503 to stir the oil-water mixture in the first measuring cylinder, accelerating the emulsification process for 5 minutes. Simultaneously with starting the paddle stirring motor 502, the control system 2 begins timing. After stirring, the control system 2 immediately resets the paddle stirring motor 502 and the paddle lift 501. The experimenter uses a glass rod coated with oil-resistant rubber to scrape the oil-water mixture adhering to the paddle 503 back into the first measuring cylinder.

[0019] The experimenters then observed the separation of the oil-water mixture in the first graduated cylinder. When the emulsion layer at the oil-water interface decreased to less than or equal to 3 ml, the oil-water separation was considered complete. The experimenters immediately pressed the stop timing button, and the control system 2 stopped timing and stored the data obtained. The experimenters then cleaned or replaced the paddle 503, and the control system 2 disconnected the detection optocoupler 405. The control slide platform 401, carrying the constant-temperature water device 3, moved along the slide guide rail 402 in a preset direction and distance. After the detection optocoupler trigger rod 310 corresponding to the first graduated cylinder passed the detection optocoupler 405, the control system 2 restarted the detection optocoupler 405. When the slide platform 401 brought the mouth of the second graduated cylinder directly below the paddle, the detection optocoupler trigger rod 310 corresponding to the second graduated cylinder also reached the detection optocoupler 405. The detection optocoupler 405 transmitted a signal to the control system 2, and the control system 2 immediately stopped the slide operation, repeating the emulsification and detection process. The control system 2 stored the data obtained the second time.

[0020] The test personnel clean or replace the propeller 503 again, and the control system 2 disconnects the detection optocoupler 405. The control slide platform 401, carrying the constant temperature water device 3, continues to move along the slide guide rail 402 in a preset direction and distance. After the detection optocoupler trigger rod 310 corresponding to the third measuring cylinder passes the detection optocoupler 405, the control system 2 restarts the detection optocoupler 405. When the slide platform 401 sends the mouth of the third measuring cylinder directly below the propeller, the detection optocoupler trigger rod 310 corresponding to the third measuring cylinder also reaches the detection optocoupler 405. The detection optocoupler 405 transmits a signal to the control system 2, and the control system 2 immediately stops the slide operation and repeats the above emulsification and detection process. The control system 2 stores the data obtained the third time.

[0021] After all the oil samples in the three measuring cylinders have been measured, the control system 2 resets the slide platform 401, carrying the constant temperature water device 3 back to its initial position. In this embodiment, the endpoint limit optocoupler 404 and the starting limit optocoupler 406 are normally open to ensure that the movement range of the constant temperature water device 3 does not exceed the set safety range, thus preventing damage to the device.

Claims

1. A demulsification measuring device capable of automatic sample injection, characterized in that, include: The system comprises a housing, a control system, a constant-temperature water bath device, a transfer and positioning device, and a mixing device. The constant-temperature water bath device includes a constant-temperature water bath cover, a constant-temperature water bath, a constant-temperature water bath support, a measuring cylinder fixing ring, a measuring cylinder support frame, a U-shaped heating rod, an underwater stirrer, an end-point limit optical coupler trigger rod, a start-point limit optical coupler trigger rod, and a detection optical coupler trigger rod. The transfer and positioning device includes a sliding platform, a sliding guide rail, an optical coupler bracket, an end-point limit optical coupler, a detection optical coupler, and a start-point limit optical coupler. The mixing device includes a paddle lift, a paddle stirring motor, and paddles.

2. The demulsification measuring device capable of automatic sample injection according to claim 1, characterized in that, The control system is used to control the operation of the U-shaped heating rod and the underwater stirrer to heat the water in the constant temperature bath to 54℃±1℃ and keep it constant.

3. The demulsification measuring device capable of automatic sample injection according to claim 1, characterized in that, The control system is used to control the slide platform carrying the constant temperature water device to move along the slide guide rail. By cooperating with the detection optocoupler trigger rod, the slide platform can accurately deliver the measuring cylinder mouth directly below the blade.

4. The demulsification measuring device capable of automatic sample injection according to claim 1, characterized in that, The endpoint limiting optocoupler and the starting limiting optocoupler are normally open and are used to limit the movement range of the constant temperature water device within the set safety range.

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