Quantitative automatic sampler for lubricating oil used in chemical analysis

Abstract

The present application relates to the technical fields of chemical analysis and detection, and discloses a lubricating oil quantitative automatic sampler for chemical analysis, which comprises a mounting disc, a plurality of through fixing holes are formed in the upper surface of the mounting disc, an adjusting mechanism is arranged on the upper surface of the mounting disc, a fixing plate is fixedly connected to the top end of the adjusting mechanism, and sampling mechanisms are arranged on the two sides of the fixing plate. In the present application, the adjusting mechanism adopts an electric telescopic rod combined with a gear rotary transmission structure, so that the working height and the rotary position of the sampling mechanism can be freely adjusted. A closed-loop automatic control system is formed by combining a position sensor and a control box, which can real-time feedback position information and accurately correct deviation, ensure that the sampling tube quickly aligns with the sampling point, and can be accurately rotated above the gas chromatography sample inlet in the subsequent process. The position error caused by manual adjustment is fundamentally avoided, and the positioning accuracy and the automation degree of the whole sampling and sampling process are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of chemical analysis and testing technology, and in particular to an automatic quantitative sampler for lubricating oil used in chemical analysis. Background Technology

[0002] In the process of chemical production and equipment operation and maintenance, component analysis, impurity detection and performance evaluation of lubricating oil are key links to ensure production safety, improve product quality and extend equipment service life. As the core equipment for the separation and quantitative analysis of lubricating oil components, the accuracy and repeatability of the analysis results of gas chromatograph directly depend on the sampling quality of lubricating oil samples in the pretreatment stage. Currently, in the field of chemical analysis, sampling of lubricating oils still commonly employs manual sampling or simple manual sampling devices in conjunction with gas chromatographs. Manual sampling is not only labor-intensive and inefficient, but the subjectivity of manual operation can easily lead to inconsistent sample volumes and sampling timing, failing to meet the stringent quantitative accuracy requirements of gas chromatography analysis. This results in deviations in chromatographic analysis results, affecting the accurate assessment of lubricating oil components, additive content, and impurities. Furthermore, while existing simple manual sampling devices can achieve preliminary quantification, the oil sample must be manually transferred to the chromatographic inlet after sampling. During this transfer, oil leakage, contamination, or component volatilization can easily occur, disrupting the original state of the oil sample. This leads to discrepancies between the component information detected by the gas chromatograph and the actual state of the lubricating oil. Moreover, the quantitative structure of such sampling devices is often fixed, making it impossible to adjust the quantitative volume according to the gas chromatographic analysis requirements of lubricating oil samples with different concentrations. This results in poor applicability and difficulty in meeting the diverse detection needs of lubricating oils under different operating conditions. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic quantitative sampler for lubricating oil in chemical analysis. This device is capable of accurate quantitative sampling and automatic sampling of lubricating oil, thus solving the problems of insufficient quantitative accuracy, low sampling efficiency, and easy oil sample contamination in existing sampling methods.

[0004] To achieve the above objectives, the present invention provides the following technical solution: An automatic quantitative sampler for lubricating oil used in chemical analysis includes a mounting circular plate. The upper surface of the mounting circular plate has multiple through-holes for fixing. An adjustment mechanism is provided on the upper surface of the mounting circular plate. A fixing plate is fixedly connected to the top of the adjustment mechanism. Sampling mechanisms are provided on both sides of the fixing plate. The adjustment mechanism includes a movable block, the lower surface of which is rotatably connected to the upper surface of the mounting circular plate via a rotating shaft, and an electric telescopic rod is fixedly connected to the upper surface of the movable block. The top end of the output shaft of the electric telescopic rod is fixedly connected to the lower surface of the fixed plate. The sampling mechanism includes sampling bottles. The lower surfaces of the two sampling bottles are rotatably connected to movable nozzles via rotating shafts. Sampling tubes are fixedly connected to the lower surfaces of the two movable nozzles. Piston circular plates are slidably connected inside the two sampling bottles. Movable plates are fixedly connected to the upper surfaces of the two sampling bottles. Electric telescopic rods are provided on the left and right sides of the fixed plates. The bottom ends of the output shafts of the two electric telescopic rods are fixedly connected to the upper surfaces of the two movable plates, respectively. An operating box is fixedly connected to the upper surfaces of the two movable plates. An L-shaped stabilizing plate is fixedly connected to the outer walls of the two electric telescopic rods together with the upper surface of the fixed plate. Furthermore, the upper inner surface of the sampling bottle and the lower inner surface of the operation box are both provided with movable vertical grooves. The upper surfaces of the two piston plates are fixedly connected with adjusting vertical rods. The top ends of the two adjusting vertical rods pass through the two movable vertical grooves and are fixedly connected with sliding plates. The outer side walls of the two sliding plates are slidably connected to the interior of the two operation boxes. The rear surfaces of the two adjusting vertical rods are provided with multiple toothed grooves. The lower opposite sides of the two operation boxes are fixedly connected with motors. The output shafts of the two motors are fixedly connected with rotating rods at opposite ends. The opposite ends of the two rotating rods are rotatably connected to the interior opposite sides of the two operation boxes through rotating shafts. The outer side walls of the two rotating rods are fixedly connected with actuating gears. The outer side walls of the two actuating gears are meshed with the inner side walls of the multiple toothed grooves. Furthermore, a driven gear is fixedly connected to the outer wall of the movable block, and a main gear is rotatably connected to the upper surface of the mounting circular plate and located to the right of the driven gear via a rotating shaft. A second motor is arranged above the main gear, and the bottom end of the output shaft of the second motor is fixedly connected to the center of the upper surface of the main gear. An L-shaped support plate is fixedly connected to the upper surface of the second motor and the upper surface of the mounting circular plate. Furthermore, limiting rods are slidably connected inside the two sliding plates and in front of and behind the two adjusting rods, and the two ends of the multiple limiting rods are fixedly connected to the upper and lower inner surfaces of the two operating boxes, respectively. Furthermore, the sampling bottle has a through-hole on its lower inner surface, and a fixed circular plate is fixedly connected inside the through-hole. The inside of the through-hole is connected to the inside of the movable nozzle. The lower surface of the fixed circular plate is rotatably connected to a movable circular plate via a rotating shaft. The upper surface of the fixed circular plate has symmetrical through-hole suction holes one and the upper surface of the movable circular plate has symmetrical through-hole suction holes two. The inside of each of the two suction holes one is connected to the inside of each of the two suction holes two. The outer wall of the movable circular plate is fixedly connected to the inner wall of the movable nozzle. Furthermore, both sampling bottles have graduation markings on the front surface of their outer side walls; Furthermore, the lower surfaces of the two movable plates are respectively fixedly connected to the lower surfaces of the two sampling bottles with L-shaped support plates two. The upper surfaces of the two L-shaped support plates two are fixedly connected with motors three. The lower surfaces of the two L-shaped support plates two are each provided with pulleys one. The bottom ends of the output shafts of the two motors three are respectively fixedly connected to the upper surfaces of the two pulleys one. The outer walls of the two movable nozzles and located below the two L-shaped support plates two are each fixedly connected with pulleys two. The outer walls of the two pulleys one and the outer walls of the two pulleys two are respectively connected to a transmission belt for transmission. Furthermore, a control box is fixedly connected to the center of the upper surface of the fixed plate, and orientation sensors are fixedly connected to the lower surfaces of the two movable plates and to the opposite sides of the two L-shaped support plates. Furthermore, each of the two pulleys has a limiting ring groove on its lower surface, and each of the two limiting ring grooves has a limiting post slidably connected inside. The lower surfaces of the two limiting posts are respectively fixedly connected to the lower surfaces of the two L-shaped support plates.

[0005] The present invention has the following beneficial effects: In this invention, the adjustment mechanism adopts an electric telescopic rod combined with a gear rotation transmission structure, which can freely adjust the working height and rotation position of the sampling mechanism. Combined with the orientation sensor and the control box, it forms a closed-loop automatic control system that can provide real-time feedback of position information and accurately correct deviations, ensuring that the sampling tube is quickly aligned with the sampling point. Subsequently, it can also be accurately rotated above the gas chromatograph injection port, fundamentally avoiding orientation errors caused by manual adjustment and significantly improving the positioning accuracy and automation of the entire sampling and injection process. This invention employs a dual sampling mechanism with synchronous configuration, enabling sequential alternating sampling and injection. It allows for continuous operation without waiting for reset after each sampling, significantly improving the sampling efficiency of lubricating oil in chemical analysis scenarios. It is particularly suitable for batch sample testing. The sampling mechanism uses a motor to drive a gear and an adjusting rod, which in turn drive a piston plate to smoothly rise and fall, completing liquid aspiration and dispensing. Combined with clear graduations on the outer wall of the sampling bottle, the sampling volume can be intuitively monitored and precisely controlled, achieving quantitative extraction and injection of lubricating oil. This ensures highly consistent sampling volume each time, effectively eliminating volume deviations caused by manual sampling. It provides a stable and standard sample volume for subsequent gas chromatography analysis, significantly improving the accuracy, repeatability, and reliability of the test results. The sampling bottle of this invention features a controllable opening and closing flow path structure at the bottom, consisting of a fixed circular plate and a movable circular plate. A motor drives a pulley and a transmission belt to rotate the movable nozzle, thereby controlling the connection and misalignment of the first and second suction holes. When suctioning lubricating oil, the flow path is automatically opened to ensure smooth sampling. During the transfer of the sample to the inlet, the flow path is closed to form a reliable seal. Simultaneously, the limiting ring groove and limiting post structure below the pulley effectively limit the maximum rotation angle of the movable nozzle, preventing excessive rotation that could lead to seal failure. Structurally, this design avoids leakage, dripping, or evaporation of lubricating oil during transfer, ensuring the integrity of the sample volume and reducing the risk of external impurities contaminating the sample, further guaranteeing detection accuracy. This invention features fully automated operation from orientation positioning, quantitative sampling, sealing protection to automatic sample introduction, completely replacing manual operation, significantly reducing human error, simplifying the chemical analysis sampling process, and possessing advantages such as accurate positioning, precise quantification, high efficiency, and good sealing performance. It can fully meet the high-precision and high-stability testing requirements of the chemical industry for lubricating oil samples. Attached Figure Description

[0006] Figure 1 This is a perspective view of an automatic quantitative sampler for lubricating oil used in chemical analysis proposed in this invention. Figure 2 This is a schematic diagram of the sampling bottle of an automatic quantitative sampler for lubricating oil used in chemical analysis proposed in this invention; Figure 3 This is a schematic diagram of the adjusting vertical rod of an automatic sampler for quantitative analysis of lubricating oil proposed in this invention; Figure 4 This is a schematic diagram of the toothed groove structure of an automatic sampler for quantitative analysis of lubricating oil proposed in this invention. Figure 5 This is a schematic diagram of the fixed circular plate of an automatic sampler for quantitative analysis of lubricating oil proposed in this invention; Figure 6 This is a schematic diagram of the limiting ring groove of an automatic sampler for quantitative analysis of lubricating oil proposed in this invention. Figure 7 This invention proposes an automatic quantitative sampler for lubricating oil used in chemical analysis. Figure 3 A magnified structural diagram of point A in the middle.

[0007] Legend: 1. Mounting circular plate; 2. Fixing hole; 3. Adjustment mechanism; 301. Movable block; 302. Electric telescopic rod one; 303. Driven gear; 304. Main gear; 305. Motor two; 306. L-shaped support plate one; 4. Fixing plate; 5. Sampling mechanism; 501. Sampling bottle; 502. Movable nozzle; 503. Sampling tube; 504. Piston circular plate; 505. Moving plate; 506. Electric telescopic rod two; 507. Control box; 508. Movable vertical groove; 509. Adjusting vertical rod; 510. Sliding plate; 511. Gear groove; 512. 513. Motor 1; 514. Rotating rod; 515. Actuating gear; 516. Limiting vertical rod; 517. Connecting circular hole; 518. Fixed circular plate; 519. Movable circular plate; 520. Suction circular hole 1; 521. Suction circular hole 2; 522. L-shaped stabilizing plate 1; 523. Scale marking; 524. L-shaped support plate 2; 525. Motor 3; 526. Belt pulley 1; 527. Belt pulley 2; 528. Transmission belt; 529. Limiting ring groove; 530. Limiting post; 54. L-shaped stabilizing plate 2; 6. Control box; 7. Orientation sensor. Detailed Implementation

[0008] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0009] Reference Figure 1-7 An embodiment of the present invention provides an automatic quantitative sampler for lubricating oil used in chemical analysis, comprising a mounting circular plate 1, a plurality of through-holes 2 on the upper surface of the mounting circular plate 1, an adjustment mechanism 3 on the upper surface of the mounting circular plate 1, a fixed plate 4 fixedly connected to the top of the adjustment mechanism 3, and sampling mechanisms 5 on both sides of the fixed plate 4; the adjustment mechanism 3 includes a movable block 301, the lower surface of the movable block 301 is rotatably connected to the upper surface of the mounting circular plate 1 via a rotating shaft, an electric telescopic rod 302 is fixedly connected to the upper surface of the movable block 301, and the top of the output shaft of the electric telescopic rod 302 is fixedly connected to the lower surface of the fixed plate 4; The sampling mechanism 5 includes sampling bottles 501. The lower surfaces of both sampling bottles 501 are rotatably connected to movable nozzles 502 via rotating shafts. Sampling tubes 503 are fixedly connected to the lower surfaces of both movable nozzles 502. Piston plates 504 are slidably connected inside both sampling bottles 501. Moving plates 505 are fixedly connected to the upper surfaces of both sampling bottles 501. Electric telescopic rods 506 are provided on the left and right sides of the fixed plate 505. The bottom ends of the output shafts of the two electric telescopic rods 506 are fixedly connected to the upper surfaces of the two moving plates 505, respectively. An operating box 507 is fixedly connected to the upper surfaces of both moving plates 505. L-shaped stabilizing plates 521 are fixedly connected to the outer walls of both electric telescopic rods 506 and the upper surface of the fixed plate 505. Movable vertical joints are provided on the inner upper surfaces of the sampling bottles 501 and the inner lower surfaces of the operating box 507. The upper surfaces of the two piston plates 504 are fixedly connected to the groove 508, and the top ends of the two adjusting vertical rods 509 pass through the two movable vertical grooves 508 respectively. They are also fixedly connected to the sliding plates 510. The outer side walls of the two sliding plates 510 are slidably connected to the interior of the two operating boxes 507 respectively. The rear surfaces of the two adjusting vertical rods 509 are provided with multiple toothed grooves 511. The lower sides of the opposite sides of the two operating boxes 507 are fixedly connected to the motor 512. The output shafts of the two motors 512 are fixedly connected to the opposite ends of the output shafts of the two motors 512. The opposite ends of the two rotating rods 513 are rotatably connected to the interior opposite sides of the two operating boxes 507 through rotating shafts. The outer side walls of the two rotating rods 513 are fixedly connected to the actuating gears 514. The outer side walls of the two actuating gears 514 are meshed with the inner side walls of the multiple toothed grooves 511 respectively. By using multiple through-holes 2 on the mounting plate 1, the device can be stably installed in different working scenarios, ensuring that the device will not shift during sampling and guaranteeing sampling accuracy. The movable block 301 in the adjustment mechanism 3 is rotatably connected to the mounting plate 1 via a rotating shaft. With the help of the electric telescopic rod 302, the height and horizontal angle of the fixing plate 4 can be flexibly adjusted, thereby driving the sampling mechanisms 5 on both sides to adjust to the appropriate sampling position, adapting to the lubricating oil sampling needs at different heights and positions, and solving the problem of difficulty in accurately controlling the sampling position manually. The sampling tube 503 can penetrate deep into the lubricating oil to achieve precise sampling. The piston plate 504 inside the sampling bottle 501 is connected to the sliding plate 510 via the adjusting vertical rod 509. The motor 512 drives the rotating rod 513 and the actuating gear 514 to rotate. The actuating gear 514 meshes with the tooth groove 511 on the rear surface of the adjusting vertical rod 509, which can drive the adjusting vertical rod 509 to move the piston plate 504 upward. The sliding mechanism allows for the quantitative extraction of lubricating oil. Simultaneously, the electric telescopic rod 506 moves the moving plate 505 and sampling bottle 501 up and down, assisting in adjusting the sampling height. The L-shaped stabilizing plate 521 enhances the installation stability of the electric telescopic rod 506, preventing shaking during operation and ensuring sampling accuracy. The control box 507 provides protection for components such as the motor 512 and sliding plate 510, extending their service life. The movable vertical groove 508 guides the movement of the adjusting vertical rod 509, ensuring smooth sliding of the piston plate 504. The two sampling mechanisms 5 sequentially absorb the oil, increasing extraction efficiency. Simultaneously, the sampling mechanism 5 allows for the quantitative extraction of lubricating oil as needed. The entire device achieves precise control of sampling location and quantity, replacing manual sampling, reducing human error, and improving sampling efficiency and quality. It meets the precise requirements for lubricating oil sampling in chemical analysis, and its reasonable structural design, tight component fit, convenient operation, and strong stability make it highly stable.

[0010] like Figure 1 As shown, a driven gear 303 is fixedly connected to the outer wall of the movable block 301. A main gear 304 is rotatably connected to the upper surface of the mounting circular plate 1 and located to the right of the driven gear 303 via a rotating shaft. A second motor 305 is provided above the main gear 304. The bottom end of the output shaft of the second motor 305 is fixedly connected to the center of the upper surface of the main gear 304. An L-shaped support plate 306 is fixedly connected to the upper surface of the second motor 305 and the upper surface of the mounting circular plate 1. The motor 305 starts and drives the main gear 304 to rotate. The main gear 304 meshes with the driven gear 303 to drive the movable block 301 to rotate. This allows the sampling mechanism 5, which has completed the lubricating oil absorption, to be smoothly and accurately rotated and transferred to the corresponding position of the gas chromatograph inlet. After the sampling tube 503 is aligned with the inlet, the motor 512 rotates in the opposite direction, driving the rotating rod 513 and the actuating gear 514 to rotate synchronously in reverse. The actuating gear 514, in conjunction with the tooth groove 511, drives the adjusting vertical rod 509 to move downward, thereby controlling the piston plate 504 to slide downward. This smoothly squeezes the lubricating oil quantitatively extracted from the sampling bottle 501 into the chromatograph inlet, completing the automatic injection operation. The entire process does not require manual transfer, which avoids lubricating oil sample contamination and evaporation loss, and ensures that the sampling and injection volume are consistent, thus improving the accuracy and stability of chemical analysis and testing results.

[0011] like Figure 3 As shown, the two sliding plates 510 are slidably connected to limit rods 515 inside and in front of and behind the two adjusting rods 509. The two ends of the multiple limit rods 515 are fixedly connected to the upper and lower inner surfaces of the two operating boxes 507, respectively. The limiting vertical rod 515 can guide and limit the up and down movement of the sliding plate 510, preventing the sliding plate 510 from shifting left or right or shaking during the movement. This ensures that the adjusting vertical rod 509 and the piston plate 504 always move smoothly in the vertical direction, preventing deviations in lubricating oil sampling and extrusion volume caused by component misalignment, and further improving the stability and accuracy of quantitative sampling and automatic injection processes.

[0012] like Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, a through-hole 516 is provided on the lower inner surface of the sampling bottle 501. A fixed circular plate 517 is fixedly connected inside the through-hole 516. The inside of the through-hole 516 is connected to the inside of the movable nozzle 502. A movable circular plate 518 is rotatably connected to the lower surface of the fixed circular plate 517 via a rotating shaft. A through-hole first suction hole 519 is symmetrically provided on the upper surface of the fixed circular plate 517. A through-hole second suction hole 520 is symmetrically provided on the upper surface of the movable circular plate 518. The inside of the two suction holes 519 is connected to the inside of the two suction holes 520 respectively. The outer side wall of the movable circular plate 518 is fixedly connected to the inner side wall of the movable nozzle 502. The lower surfaces of the two movable plates 505 are fixedly connected to the lower surfaces of the two sampling bottles 501 with L-shaped support plates 523. The upper surfaces of the two L-shaped support plates 523 are fixedly connected to motors 524. The lower surfaces of the two L-shaped support plates 523 are provided with pulleys 525. The bottom ends of the output shafts of the two motors 524 are fixedly connected to the upper surfaces of the two pulleys 525. The outer walls of the two movable nozzles 502, located below the two L-shaped support plates 523, are fixedly connected to pulleys 526. The outer walls of the two pulleys 525 and the outer walls of the two pulleys 526 are connected to a transmission belt 527. L-shaped support plate 2 523 provides stable mounting support for motor 3 524 and pulley 1 525, preventing them from shaking during operation and affecting transmission accuracy. When motor 3 524 starts, it drives pulley 1 525 to rotate, which in turn drives pulley 2 526 to rotate synchronously via transmission belt 527. This, in turn, drives the movable nozzle 502 to rotate. When the movable nozzle 502 rotates, it drives the movable circular plate 518 fixedly connected to it to rotate synchronously. Motor 3 524 can control the rotation of the movable nozzle 502, and in turn, control the rotation of the movable circular plate 518, so that the two suction holes 1 519 and the two suction holes 2 520 are misaligned. At this time, the fixed circular plate 517 and the movable circular plate 518 cooperate to block the connecting hole 516, preventing sampling errors. During the transfer to the chromatographic injection port, the lubricating oil inside the sampling bottle 501 leaks. To ensure the accuracy of the detection and avoid insufficient sampling or contamination due to leakage, when the lubricating oil needs to be aspirated, the motor 3 524 rotates in the reverse direction, which drives the movable circular plate 518 to rotate in the reverse direction, reconnecting the two aspiration holes 1 519 and 2 520. At this time, the inside of the sampling bottle 501 can be connected to the sampling tube 503 through the connecting hole 516, aspiration hole 1 519, and aspiration hole 2 520, thus successfully completing the lubricating oil aspiration operation. This achieves leakage prevention control during the sampling and transfer process, further ensuring the accuracy of quantitative sampling and the integrity of the sample, and meeting the strict requirements for lubricating oil samples in chemical analysis.

[0013] like Figure 2 and Figure 4 As shown, the outer side wall front surface of both sampling bottles 501 is provided with scale markings 522; The scale marking 522 clearly indicates the volume scale inside the sampling bottle 501, which can intuitively display the actual volume of lubricating oil extracted from the sampling bottle 501. This allows operators to observe the sampling amount in real time. At the same time, it can cooperate with the quantitative extraction mechanism driven by motor 512 for double verification, ensuring that the extracted lubricating oil volume strictly meets the testing requirements of chemical analysis, avoiding quantitative deviations. It can also detect abnormalities in a timely manner during the sampling process, facilitating rapid adjustments to the operation, further improving the accuracy and convenience of sampling, and providing a basic guarantee for the accuracy of subsequent gas chromatography detection.

[0014] like Figure 1 and Figure 2 As shown, a control box 6 is fixedly connected to the center of the upper surface of the fixed plate 4, and orientation sensors 7 are fixedly connected to the lower surfaces of the two movable plates 505 and to the opposite sides of the two L-shaped support plates 523. The control box 6 can centrally receive the real-time angle and position signals from the orientation sensor 7, and simultaneously control the start, stop, and operation parameters of motor 305, motor 512, motor 524, and each electric telescopic rod, realizing the automated control of the entire sampling and injection process. The orientation sensor 7 can monitor the rotation orientation, tilt angle, and spatial position of the sampling mechanism 5 in real time, and feed back the accurate orientation data to the control box 6. With the closed-loop control logic of the control box 6, it ensures that the sampling tube 503 is accurately aligned with the sampling point and the subsequent chromatographic injection port, effectively avoiding sampling difficulties, inaccurate injection, or sample spillage caused by orientation deviation. At the same time, it can accurately determine the rotation position, ensuring that the rotation angle of the device is accurate and reliable, further improving the positioning accuracy and operational stability of the entire process of quantitative sampling and automatic injection of lubricating oil.

[0015] like Figure 6 As shown, the lower surfaces of the two pulleys 525 are provided with limiting ring grooves 528, and the interiors of the two limiting ring grooves 528 are slidably connected with limiting posts 529. The lower surfaces of the two limiting posts 529 are respectively fixedly connected to the lower surfaces of the two L-shaped support plates 523 with L-shaped stabilizing plates 530. The L-shaped stabilizing plate 530 provides stable support for the limiting column 529. The limiting column 529 and the limiting ring groove 528 work together to effectively limit the maximum rotation angle of the movable nozzle 502, avoiding excessive rotation when driven by the motor 524. This prevents leakage during the transfer of samples to the chromatographic injection port due to excessive misalignment or incomplete reset of the movable circular plate 518 and the fixed circular plate 517. At the same time, it ensures that the first suction hole 519 and the second suction hole 520 can be accurately aligned or closed, further improving the reliability of the device operation and the accuracy of sampling and injection.

[0016] Working Principle: This invention consists of a mounting base, an orientation and height adjustment mechanism, a dual-path independent quantitative sampling mechanism, a flow path sealing and opening / closing mechanism, and a sensor control system working together to complete a fully automated process of positioning, sample aspiration, sealing and transport, and precise sample injection under the unified scheduling of the control box. The complete working principle is as follows: First, the entire machine is fixed to the designated position next to the gas chromatograph using multiple sets of fixing holes 2 on the surface of the mounting plate 1 and bolts, completing the hardware installation. The operator presets the target sampling volume, sampling point coordinates, chromatographic inlet coordinates, motor speeds, and telescopic rod stroke parameters in the control box 6. The entire machine is powered on and initialized. The orientation sensor 7, each motor, and the electric telescopic rod complete the origin reset calibration. The limit vertical rod 515, limit column 529, and limit ring groove 52 are then activated. 8. After synchronously verifying the limit travel and confirming that there is no jamming in any transmission or sliding component, the system enters standby mode. Subsequently, the control box 6 sends a rotation command to motor 2 305. Motor 2 305 drives the main gear 304 to rotate at a constant speed. The main gear 304 meshes with and drives the driven gear 303 to rotate synchronously. The driven gear 303 is fixed to the movable block 301 and drives the movable block 301 to rotate horizontally around the axis of the mounting plate 1. The orientation sensor 7 below the moving plate 505 collects the angle and position data of the sampling mechanism 5 in real time and sends it back to the control box 6 to form a closed-loop feedback. When the sampling tube 503 is aligned with the sampling port of the lubricating oil storage tank / equipment, the control box 6 issues a stop command to lock motor 2 305 to complete the horizontal orientation positioning. At the same time, the electric telescopic rod 1 302 in the adjustment mechanism 3 extends and retracts. The top fixed plate 4 is raised and lowered as a whole, and the overall working height of the left and right sampling mechanisms 5 is adjusted synchronously to adapt to different liquid levels and sampling ports of different heights. The L-shaped support plate 306 provides support and reinforcement for the motor 305 to ensure stable operation of the rotary transmission structure without shaking. The electric telescopic rods 506 on both sides of the fixed plate 4 extend downward to push the moving plate 505 and the sampling bottle 501 down as a whole, so that the sampling tube 503 is immersed to a specified depth below the lubricating oil surface. The L-shaped stabilizing plate 521 reinforces the electric telescopic rod 506 to counteract the lateral force generated during the oil suction and discharge process and prevent the sampling bottle 501 from shifting. After the sampling tube 503 is in place, the control box 6 starts the motor 524. The output shaft of the motor 524 drives the pulley 525 to rotate, which drives the pulley 525 through the transmission belt 527. 526 synchronously drives the movable nozzle 502 to rotate slightly around the rotating shaft. The movable circular plate 518, which is fixed to the inner side of the movable nozzle 502, rotates synchronously, so that the second suction hole 520 on the movable circular plate 518 completely coincides with the first suction hole 519 on the fixed circular plate 517. This connects the circular hole 516, the inner cavity of the sampling bottle 501, the movable nozzle 502, and the sampling tube 503 to form a through oil channel. The bottom limiting ring groove 528 of the pulley 525 and the limiting post 529 supported by the L-shaped stabilizing plate 530 cooperate to limit the maximum rotation angle of the pulley 525, preventing the movable nozzle 502 from rotating excessively and causing the circular hole to misalign and become unobstructed, thus ensuring that the flow path is completely unobstructed. Afterwards, the motor 512 inside the control box 507 starts in the forward direction, driving the rotating rod 513 and the actuating gear 514 to rotate synchronously.The gear 514 engages with the evenly distributed toothed grooves 511 on the rear side of the adjusting rod 509, driving the adjusting rod 509 upward. The adjusting rod 509 passes through the movable vertical groove 508 and its top is connected to the sliding plate 510. The sliding plate 510 is sleeved on the outside of the two front and rear limiting vertical rods 515, which vertically guide the sliding plate 510 to prevent lateral deviation, ensuring that the adjusting rod 509 rises and falls vertically and smoothly. The bottom of the adjusting rod 509 is connected to the piston plate 504 inside the sampling bottle 501. As the adjusting rod 509 moves upward, the piston plate 504 moves upward synchronously, creating a negative pressure inside the sampling bottle 501. Lubricating oil is drawn into the sampling bottle 501 through the sampling tube 503, the aligned suction hole 2 520, and the suction hole 1 519. The operator... The real-time oil absorption volume can be visually observed through the scale markings 522 on the outer wall of the sampling bottle 501. When the piston rises to the scale corresponding to the preset quantitative stroke, the control box 6 receives the stroke signal from the encoder of motor 1 512 and controls motor 1 512 to immediately stop and lock, thus stopping the oil absorption. This achieves precise and controllable single sampling volume, eliminating the volume error of manual sampling. After the oil absorption is completed, the control box 6 reverses the start of motor 3 524, driving pulley 1 525, transmission belt 527, and pulley 2 526 to rotate in reverse. This drives the movable nozzle 502 and movable circular plate 518 to rotate in the opposite direction, causing suction holes 1 519 and 2 520 to be misaligned and blocked. The fixed circular plate 517 and the movable circular plate 518 form a double-layer sealed partition, separating the oil inside the sampling bottle 501 from the external sampling tube 503 channel. Complete isolation is achieved through the use of the limiting column 529 and the limiting ring groove 529 to limit the maximum angle of reversal, ensuring a complete misalignment and seal of the circular hole. This prevents lubricating oil dripping and leakage during transport, as well as the evaporation of light components. Simultaneously, it isolates the sample from airborne impurities, preserving the original composition of the lubricating oil. After sealing, the electric telescopic rod 506 retracts, lifting the sampling bottle 501 and detaching the sampling tube 503 from the lubricating oil surface. Subsequently, the control box 6 restarts the motor 305, causing the movable block 301 and the fixed plate 4 to rotate horizontally. The orientation sensor 7 provides real-time feedback of the position signal, correcting the rotation angle in a closed-loop manner until the sampling mechanism is precisely positioned directly above the gas chromatograph inlet. The electric telescopic rod 302 then finely adjusts the machine height, and the electric telescopic rod 506 slightly lowers to retrieve the sample. Sample vial 501 is positioned so that the end of sampling tube 503 is aligned with the chromatographic inlet, completing the pre-injection positioning. Then, control box 6 controls motor 3 524 to rotate forward, realigning the circular hole of movable plate 518 with the circular hole of fixed plate 518, thus reopening the oil channel. Motor 1 512 starts in reverse, driving gear 514 to reverse and push adjusting rod 509 downwards, causing piston plate 504 to press down at a constant speed, squeezing a quantitative amount of lubricating oil inside sample vial 501. The oil is then uniformly discharged into the gas chromatograph inlet through the connecting hole, movable nozzle 502, and sampling tube 503. Relying on precise gear and rack transmission and a preset piston stroke, the discharged oil volume is completely consistent with the absorbed volume, achieving quantitative injection, ensuring uniform sample volume for chromatographic analysis, and improving the repeatability and accuracy of detection data.This device features two symmetrically arranged, completely independent sampling mechanisms 5. The control box 6 can be configured with alternating operation logic. After a single sampling mechanism completes oil suction, transfer, and sample discharge, there is no need for a complete machine reset. Motor 2 305 directly rotates to switch to the other empty sampling mechanism to simultaneously execute the next set of lubricating oil sampling processes. The alternating operation of the two sampling mechanisms eliminates the waiting time for a complete machine reset after each sampling, significantly improving the efficiency of batch sample testing. It is suitable for large-scale lubricating oil component analysis in chemical laboratories. After all samples in a single batch have been sampled and injected, the control box 6 issues a reset command, and motors 1 512, 2 305, and 3 524 all rotate back to their initial origin. All electric telescopic rods are fully retracted, and the movable circular plate 518... Maintaining a sealed, closed state, the entire machine returns to its initial standby position, awaiting the next batch of sampling instructions. All actions throughout the process are automatically controlled in a closed loop by the control box and orientation sensor, requiring no manual intervention and completely replacing manual sampling, transfer, and injection operations. Simultaneously, various auxiliary support structures work together to ensure the stability of the entire machine. L-shaped stabilizing plate 1 (521) reinforces the electric telescopic rod 2 (506) to prevent swaying during lifting operations. L-shaped support plate 2 (523) provides a mounting base for motor 3 (524) and the belt drive assembly. L-shaped stabilizing plate 2 (530) fixes the limiting post 529 to ensure the long-term stability of the rotation limiting structure. The operating box 507 encloses motor 1 (512) and the gear and rack sliding assembly, isolating them from lubricating oil dust and contaminants, extending the service life of the transmission components.

[0017] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 quantitative sampler for lubricating oil used in chemical analysis, comprising a mounting circular plate (1), characterized in that: The upper surface of the mounting circular plate (1) is provided with multiple through-hole fixing holes (2), and the upper surface of the mounting circular plate (1) is provided with an adjustment mechanism (3). The top of the adjustment mechanism (3) is fixedly connected to a fixing plate (4), and sampling mechanisms (5) are provided on both sides of the fixing plate (4). The adjustment mechanism (3) includes a movable block (301), the lower surface of the movable block (301) is rotatably connected to the upper surface of the mounting circular plate (1) via a rotating shaft, and an electric telescopic rod (302) is fixedly connected to the upper surface of the movable block (301). The top end of the output shaft of the electric telescopic rod (302) is fixedly connected to the lower surface of the fixed plate (4). The sampling mechanism (5) includes sampling bottles (501). The lower surfaces of the two sampling bottles (501) are rotatably connected to movable nozzles (502) via rotating shafts. The lower surfaces of the two movable nozzles (502) are fixedly connected to sampling tubes (503). The interiors of the two sampling bottles (501) are slidably connected to piston discs (504). The upper surfaces of the two sampling bottles (501) are fixedly connected to moving plates (505). The left and right sides of the fixed plate (4) are provided with electric telescopic rods (506). The bottom ends of the output shafts of the two electric telescopic rods (506) are fixedly connected to the upper surfaces of the two moving plates (505). The upper surfaces of the two moving plates (505) are fixedly connected to operating boxes (507). The outer walls of the two electric telescopic rods (506) are fixedly connected to L-shaped stabilizing plates (521) together with the upper surface of the fixed plate (4).

2. The automatic quantitative sampler for lubricating oil used in chemical analysis according to claim 1, characterized in that: The upper inner surface of the sampling bottle (501) and the lower inner surface of the operating box (507) are both provided with movable vertical grooves (508). Adjusting vertical rods (509) are fixedly connected to the upper surfaces of the two piston discs (504). The top ends of the two adjusting vertical rods (509) pass through the two movable vertical grooves (508) respectively, and are fixedly connected to sliding plates (510). The outer walls of the two sliding plates (510) are slidably connected to the interior of the two operating boxes (507). Multiple [unclear text - possibly related to the rear surfaces of the two adjusting vertical rods (509)] are provided. Each gear slot (511) has a motor (512) fixedly connected to the lower side of each of the two operating boxes (507). The output shafts of the two motors (512) are fixedly connected to the opposite ends of each of the two motors (513). The opposite ends of the two rotating rods (513) are rotatably connected to the inner opposite sides of the two operating boxes (507) via rotating shafts. The outer walls of the two rotating rods (513) are fixedly connected to a toggle gear (514). The outer walls of the two toggle gears (514) are respectively meshed with the inner walls of the multiple gear slots (511).

3. The automatic quantitative sampler for lubricating oil used in chemical analysis according to claim 1, characterized in that: The outer wall of the movable block (301) is fixedly connected to a driven gear (303). The upper surface of the mounting plate (1) and located to the right of the driven gear (303) is rotatably connected to a main gear (304) via a rotating shaft. A second motor (305) is provided above the main gear (304). The bottom end of the output shaft of the second motor (305) is fixedly connected to the center of the upper surface of the main gear (304). The upper surface of the second motor (305) and the upper surface of the mounting plate (1) are jointly fixedly connected to an L-shaped support plate (306).

4. The automatic quantitative sampler for lubricating oil used in chemical analysis according to claim 2, characterized in that: Limiting rods (515) are slidably connected inside the two sliding plates (510) and in front of and behind the two adjusting rods (509). The two ends of the multiple limiting rods (515) are fixedly connected to the upper and lower inner surfaces of the two operating boxes (507), respectively.

5. The automatic quantitative sampler for lubricating oil used in chemical analysis according to claim 1, characterized in that: The sampling bottle (501) has a through-hole (516) on its lower inner surface. A fixed circular plate (517) is fixedly connected inside the through-hole (516). The inside of the through-hole (516) is connected to the inside of the movable nozzle (502). A movable circular plate (518) is rotatably connected to the lower surface of the fixed circular plate (517) via a rotating shaft. A through-hole (519) is symmetrically opened on the upper surface of the fixed circular plate (517). A through-hole (520) is symmetrically opened on the upper surface of the movable circular plate (518). The inside of the two through-holes (519) is connected to the inside of the two through-holes (520) respectively. The outer sidewall of the movable circular plate (518) is fixedly connected to the inner sidewall of the movable nozzle (502).

6. The automatic quantitative sampler for lubricating oil used in chemical analysis according to claim 1, characterized in that: Both of the sampling bottles (501) have graduation markings (522) on the front surface of their outer walls.

7. The automatic quantitative sampler for lubricating oil used in chemical analysis according to claim 1, characterized in that: The lower surfaces of the two movable plates (505) are fixedly connected to the lower surfaces of the two sampling bottles (501) with L-shaped support plates (523). The upper surfaces of the two L-shaped support plates (523) are fixedly connected with motors (524). The lower surfaces of the two L-shaped support plates (523) are provided with pulleys (525). The bottom ends of the output shafts of the two motors (524) are fixedly connected to the upper surfaces of the two pulleys (525). The outer walls of the two movable nozzles (502) and below the two L-shaped support plates (523) are fixedly connected with pulleys (526). The outer walls of the two pulleys (525) and the outer walls of the two pulleys (526) are connected by a transmission belt (527).

8. The automatic quantitative sampler for lubricating oil in chemical analysis according to claim 7, characterized in that: A control box (6) is fixedly connected to the center of the upper surface of the fixed plate (4), and orientation sensors (7) are fixedly connected to the lower surfaces of the two movable plates (505) and to the opposite sides of the two L-shaped support plates (523).

9. The automatic quantitative sampler for lubricating oil in chemical analysis according to claim 7, characterized in that: The lower surfaces of the two pulleys (525) are provided with limiting ring grooves (528), and the interiors of the two limiting ring grooves (528) are slidably connected with limiting posts (529). The lower surfaces of the two limiting posts (529) are respectively fixedly connected with the lower surfaces of the two L-shaped support plates (523) to L-shaped stabilizing plates (530).

Images