Full-automatic salinity analysis system

Abstract

The invention provides a full-automatic salinity analysis system and relates to the technical field of ocean detection, the full-automatic salinity analysis system comprises a rack and a salinity meter mounted at the bottom of an inner cavity of the rack, a touch panel is obliquely mounted on the right side of the top end of the rack, and a sampling assembly is arranged at the upper end of the inner cavity of the rack and comprises a rotary sample disc; a plurality of groups of sample cups and a sampling needle for extracting samples in the sample cups are arranged in the middle of the upper end of the rotary sample disc, and the sampling needle is connected with a sampling pump through a hose. By arranging the rotary sample disc, the movable sampling needle and the two independent preheating barrels including the first preheating barrel and the second preheating barrel and cooperating with the control system, efficient, full-automatic and continuous operation of salinity analysis is achieved, a salinity meter almost does not need to wait, multiple samples can be continuously analyzed and detected, and the detection efficiency is improved. The seawater sample salinity analysis and detection efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of marine detection technology, specifically a fully automated salinity analysis system. Background Technology

[0002] In marine surveys, temperature, salinity, and depth are the most basic and core observation elements. Their accurate measurement has a significant impact on other physical elements in the ocean, such as seawater density, chemical and biological characteristics. Measurement errors may affect other ocean-related research and cause serious economic losses.

[0003] Currently, traditional laboratory salinity analysis, comparison, and salinity sensor calibration experiments mostly rely on manual sampling, manual sample injection, and conductivity measurement, which are cumbersome, inefficient, prone to cross-contamination between samples, and have high labor costs. Although some automated analytical instruments exist, continuous, large-scale sample analysis often suffers from long waiting times between analyses, incomplete sampling and tubing cleaning affecting the accuracy of subsequent samples, and time-consuming preheating processes impacting the overall analysis speed.

[0004] To address the aforementioned issues, we propose a fully automated salinity analysis system. Summary of the Invention

[0005] To address the problems in the background art, this invention provides a fully automated salinity analysis system. This system achieves automation, continuity, and high efficiency in salinity analysis through an integrated sampling, cleaning, preheating, and analysis process design, especially the alternating operation mode of the dual preheating tanks, while effectively avoiding cross-contamination between samples.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A fully automated salinity analysis system includes a frame and a salinity meter installed at the bottom of the frame's inner cavity. A touch panel is obliquely mounted on the top right side of the frame. A sampling assembly is provided at the upper end of the frame's inner cavity. The sampling assembly includes a rotating sample disk. Multiple sample cups are provided at the upper center of the rotating sample disk, and a sampling needle is used to extract samples from the sample cups. The sampling needle is connected to a sampling pump via a flexible tube. The output end of the sampling pump is connected to a first preheating tank and a second preheating tank via a first pipeline and a second pipeline, respectively. Both the first and second preheating tanks are connected to the salinity meter via pipelines. A cleaning assembly is located on the left side of the back of the frame. The cleaning assembly includes an ultrasonic cleaning cylinder located at the left end of the rotating sample disk. A drying assembly is located at the top center of the ultrasonic cleaning cylinder. The drying assembly includes a hot dryer with an annular exhaust duct at the air outlet. An inlet is located on the right side of the exhaust duct, which is fixedly installed at the top center of the ultrasonic cleaning cylinder. The cleaning assembly also includes two sets of inner wall stirrers, which are movably installed in the inner cavities of the first and second preheating tanks, respectively. The inner wall stirrers are driven by a cleaning motor. Preferably, the driving mechanism is used to adjust the horizontal displacement and vertical movement of the sampling needle. The driving mechanism includes a lifting component and a horizontal adjustment component. The lifting component includes an electric push rod, and the sampling needle is fixedly installed at the bottom of the output end of the electric push rod by a fixing bracket. The horizontal adjustment component includes a ball screw and a sliding block slidably installed on the surface of the ball screw. The electric push rod is fixedly installed at the middle of the left end of the sliding block by a fixing sleeve. The ball screw is movably installed in the inner cavity of the frame and is driven by a drive motor.

[0007] Preferably, the liquid outlet pipes at the bottom of the first preheating tank and the second preheating tank are both equipped with a second three-way valve, and the outlet end of the second three-way valve is respectively equipped with a drain pipe and a sample inlet pipe, and the sample inlet pipe is connected to the salinity meter.

[0008] Preferably, the outlet of the sampling pump is provided with a delivery pipe, and the end of the delivery pipe is connected to the first pipeline and the second pipeline respectively through a first three-way valve.

[0009] Preferably, the rotating sample disk is movably installed in the inner cavity of the frame. The rotating sample disk is driven by a rotary motor. The upper surface of the rotating sample disk has multiple sets of placement slots for placing sample cups in a circular array. The top of the rotating sample disk is provided with a pressure cap. The pressure cap is raised and lowered by a cylinder. Multiple sets of through holes corresponding to the placement slots are provided in the middle of the inner side of the pressure cap.

[0010] Preferably, the top opening of the sample cup is equipped with a sealing cap, and a sealing ring is provided in the middle of the inner side of the sealing cap, and a cross-shaped cut is provided in the middle of the inner side of the sealing ring.

[0011] Preferably, a limiting sliding component is provided at the middle of the right end of the sliding block. The limiting sliding component includes a limiting slide rail and a limiting slider. The limiting slide rail is fixedly installed on the support frame inside the machine frame cavity. The limiting slider is fixedly connected to the sliding block, and the limiting slider is slidably connected to the limiting slide rail.

[0012] Preferably, a liquid storage tank is provided on one side of the bottom of the frame. The liquid storage tank is located on the side of the salinity meter, and the liquid storage tank is connected to the ultrasonic cleaning cylinder through a supply pump and a supply pipeline.

[0013] Preferably, a protective cover is provided on the top left side of the frame. The protective cover is made of transparent material and is hinged to the frame via a hinge.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention features high efficiency and continuity: During the analysis process, by setting up a rotating sample tray, a movable sampling needle, and two independent preheating tanks (including a first preheating tank and a second preheating tank), along with a control system, a streamlined working mode of "analyzing one, preheating one, and preparing the next" is realized. Throughout the process, the rotating sample tray, driven by a rotating motor, sequentially rotates the sample cups to be tested to the sampling station, realizing the automatic sequential processing of batch samples. Through the alternating use of the two preheating tanks and strictly interleaved cleaning steps, the system achieves efficient, fully automatic, and continuous operation of salinity analysis while ensuring zero cross-contamination. The salinity meter requires almost no waiting time and can continuously analyze and detect multiple samples, greatly improving the efficiency of salinity analysis and detection of seawater samples. This invention utilizes a combination of a cleaning component and a sampling component. Before and after each sampling, the sampling needle can be driven into the ultrasonic cleaning chamber for thorough cleaning and drying. Simultaneously, a sampling pump extracts cleaning fluid to alternately clean the sampling pipeline, the two preheating tanks, and the salinity meter's inlet pipeline. The inclusion of an inner wall stirrer enhances the cleaning effect of the preheating tank. This series of cleaning steps effectively eliminates sample residue, preventing cross-contamination between samples and ensuring the accuracy of the analytical results. Attached Figure Description

[0015] Figure 1 This is a side view of the structure of the present invention; Figure 2 This is a schematic diagram of the sampling component in this invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the liquid storage tank in this invention; Figure 5 This is a schematic diagram of the drive mechanism in this invention; Figure 6 This is a schematic diagram of the rotating sample disk in this invention; Figure 7 This is a top view schematic diagram of the structure of each component in this invention; Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle; Figure 9 This is a schematic diagram of the drying component in this invention.

[0016] In the diagram: 1. Frame; 2. Salinity meter; 3. Touch panel; 4. Sample cup; 5. Sealing cap; 51. Sealing ring; 6. Rotary motor; 7. Rotating sample tray; 8. Storage slot; 9. Pressure cap; 91. Through hole; 10. Cylinder; 11. Sampling needle; 12. Fixing sleeve; 13. Electric push rod; 14. Sliding block; 15. Ball screw; 16. Drive motor; 17. Limit slider; 18. Limit slide rail; 19. Support frame; 20. Sampling pump ; 21. Delivery pipe; 22. First three-way valve; 23. First pipeline; 24. Second pipeline; 25. First preheating tank; 26. Second preheating tank; 27. Inner wall stirrer; 28. Cleaning motor; 29. ​​Second three-way valve; 30. Drain pipe; 31. Sample inlet pipe; 32. Ultrasonic cleaning cylinder; 33. Supply pipeline; 34. Supply pump; 35. Storage tank; 36. Hot dryer; 37. Exhaust duct; 38. Inlet; 39. Protective cover. Detailed Implementation

[0017] The technical solution in this application embodiment is to solve the problems of the background technology mentioned above. The overall idea is as follows: The system of the present invention achieves automation, continuity and high efficiency of salinity analysis through the integrated sampling, cleaning, preheating and analysis process design, especially the alternating working mode of the dual preheating tanks, while effectively avoiding cross-contamination between samples, thereby enhancing the accuracy of the analysis structure. The dual preheating tank structure allows the next sample to be preheated while one sample is being analyzed. Specifically, while the salinity meter 2 is analyzing the first sample, the second preheating tank 26 is preheating the second sample. Once the salinity meter 2 is ready, the second sample is immediately sent for analysis. At the same time, the sampling needle 11 can begin processing the third sample and inject it into the cleaned first preheating tank 25. This cycle repeats, forming a parallel pipeline operation of "preheating-analysis-cleaning", which realizes seamless connection and continuous operation of the salinity meter 2 and significantly improves detection efficiency.

[0018] Furthermore, the entire sample injection and cleaning process is fully automated, eliminating human error. The rigorous automated cleaning process, including ultrasonic cleaning, hot air drying, and internal wall stirring cleaning, completely eliminates cross-contamination of samples, ensuring the independence and accuracy of each test data.

[0019] Example: Refer to Figure 1 - Figure 9As shown, a fully automated salinity analysis system in this embodiment includes a frame 1 and a salinity meter 2 installed at the bottom of the inner cavity of the frame 1. A touch panel 3 is installed obliquely on the top right side of the frame 1. The touch panel 3 is equipped with a programming system, which enables all components to work together in a programmed manner. This programming system adopts existing mature technology and will not be described in detail again.

[0020] A sampling assembly is provided at the upper end of the inner cavity of the frame 1. The sampling assembly includes a rotating sample disk 7. Multiple sample cups 4 are provided at the middle of the upper end of the rotating sample disk 7, and a sampling needle 11 for extracting samples from the sample cups 4. The sampling needle 11 is connected to a sampling pump 20 through a hose. The output end of the sampling pump 20 is connected to a first preheating tank 25 and a second preheating tank 26 through a first pipe 23 and a second pipe 24, respectively. Both the first preheating tank 25 and the second preheating tank 26 are connected to the salinity meter 2 through pipes. A cleaning assembly is located on the left side of the back of the frame 1. The cleaning assembly includes an ultrasonic cleaning cylinder 32, which is located at the left end of the rotating sample plate 7. A drying assembly is located at the top center of the ultrasonic cleaning cylinder 32. The drying assembly includes a hot dryer 36. The air outlet of the hot dryer 36 is equipped with an annular exhaust duct 37. An inlet 38 is opened on the right side of the exhaust duct 37. The exhaust duct 37 is fixedly installed at the top center of the ultrasonic cleaning cylinder 32. The inlet 38 facilitates the insertion of the sampling needle 11 into the exhaust duct 37, which then descends into the ultrasonic cleaning cylinder 32 for cleaning. After cleaning, the needle rises back into the exhaust duct 37, at which point the hot dryer 36 can be started to dry the sampling needle 11 in a circular manner.

[0021] The cleaning assembly also includes two sets of inner wall agitators 27, which are movably installed in the inner cavities of the first preheating tank 25 and the second preheating tank 26, respectively. The inner wall agitators 27 are driven by the cleaning motor 28. A drive mechanism is used to adjust the horizontal displacement and vertical movement of the sampling needle 11. The drive mechanism includes a lifting component and a horizontal adjustment component. The lifting assembly includes an electric push rod 13, and the sampling needle 11 is fixedly installed at the bottom of the output end of the electric push rod 13 by a fixing bracket; the horizontal adjustment assembly includes a ball screw 15 and a sliding block 14 slidably installed on the surface of the ball screw 15. The electric push rod 13 is fixedly installed at the middle of the left end of the sliding block 14 by a fixing sleeve 12. The ball screw 15 is movably installed in the inner cavity of the frame 1 and is driven by a drive motor 16. The right end of the sliding block 14 is provided with a limiting sliding component, which includes a limiting slide rail 18 and a limiting slider 17. The limiting slide rail 18 is fixedly installed on the support frame 19 in the inner cavity of the frame 1. The limiting slider 17 is fixedly connected to the sliding block 14, and the limiting slider 17 is slidably connected to the limiting slide rail 18.

[0022] When the ball screw 15 drives the sliding block 14 to move, the limiting sliding assembly can effectively prevent the sliding block 14 from rotating or shifting, ensuring the straightness and stability of the horizontal movement of the sampling needle 11, so that the sampling needle 11 can move accurately. The ball screw 15 rotates, thereby driving the sliding block 14 to move horizontally along the direction of the limiting slide rail 18, thereby realizing the reciprocating switching of the position of the sampling needle 11 between sampling or cleaning. Furthermore, the setting of the ball screw 15 and the sliding block 14 can effectively improve the accuracy of the position adjustment of the sampling needle 11.

[0023] In some examples, the liquid outlet pipes at the bottom of the first preheating tank 25 and the second preheating tank 26 are both equipped with a second three-way valve 29. The outlet end of the second three-way valve 29 is respectively equipped with a drain pipe 30 and a sample inlet pipe 31. The sample inlet pipe 31 is connected to the salinity meter 2. By controlling the second three-way valve 29, the cleaning liquid in the tank can be discharged as waste liquid from the drain pipe 30, or the preheated sample can be transported to the salinity meter 2 through the sample inlet pipe 31.

[0024] In some examples, the outlet of the sampling pump 20 is provided with a delivery pipe 21. The end of the delivery pipe 21 is connected to the first pipeline 23 and the second pipeline 24 respectively through the first three-way valve 22. By controlling the first three-way valve 22, the fluid path can be switched so that the liquid pumped out from the sampling pump 20, which can be a sample or a cleaning solution, can selectively flow to the first pipeline 23 or the second pipeline 24, and thus enter the corresponding preheating tank.

[0025] In some examples, the rotating sample disk 7 is movably installed in the inner cavity of the frame 1. The rotating sample disk 7 is driven by the rotating motor 6. The upper surface of the rotating sample disk 7 has multiple sets of placement slots 8 for placing sample cups 4 in a circular array. The top of the rotating sample disk 7 is provided with a pressure cap 9. The pressure cap 9 is raised and lowered by a cylinder 10. Multiple sets of through holes 91 corresponding to the placement slots 8 are provided in the middle of the inner side of the pressure cap 9. When the pressure cap 9 is lowered, its bottom surface applies downward pressure to the sample cup 4 to keep it stable during the sampling process. Then, by rotating the rotating sample disk 7, the corresponding sample cups 4 can be rotated to the position directly below the sampling needle 11 in sequence to wait for sampling.

[0026] In some examples, the top opening of the sample cup 4 is equipped with a sealing cap 5, and a sealing ring 51 is provided in the middle of the inner side of the sealing cap 5. A cross-shaped cut is provided in the middle of the inner side of the sealing ring 51, so that the sampling needle 11 can easily pierce through the sealing cap 5 to take a sample. At the same time, due to the elasticity of the ring, the cut can automatically close after the sampling needle 11 is pulled out, which plays a good role in sealing, dust prevention and evaporation prevention.

[0027] In some examples, a liquid storage tank 35 is provided on one side of the bottom of the frame 1. The liquid storage tank 35 is located on the side of the salinity meter 2. The liquid storage tank 35 is connected to the ultrasonic cleaning cylinder 32 through a replenishment pump 34 and a replenishment pipe 33. In use, the ultrasonic cleaning cylinder 32 is equipped with a water level detection module. Once the water level drops to the set threshold, the replenishment pump 34 will start to replenish the ultrasonic cleaning cylinder 32 with cleaning fluid, thereby improving the smooth operation of the cleaning component.

[0028] In some examples, a protective cover 39 is provided on the top left side of the frame 1. The protective cover 39 is made of transparent material and is hinged to the frame 1. The transparent material allows the operator to observe the inside of the system, such as the operation status of the rotating sample tray 7 and the sampling needle 11, without opening the cover. The hinged design makes it convenient to open the protective cover 39 when maintenance or sample placement is required.

[0029] The working principle of this invention is: When multiple samples need to be analyzed and tested, the operator first puts the samples into multiple sample cups 4 and covers them with sealing caps 5 to achieve separate and sealed storage. Then, the protective cover 39 is lifted and the multiple sample cups 4 are placed into the storage slots 8 in the rotating sample tray 7 in sequence. Then, the cylinder 10 drives the pressure cap 9 to descend, so that the top of the sample cups 4 is pressed down and limited. Then the protective cover 39 is closed. At this point, the operator can start the system via the touch panel 3 to perform sampling, cleaning, preheating, and salinity analysis of the sample.

[0030] Initial Cleaning: The control system first controls the drive mechanism to operate. In the horizontal adjustment assembly, the drive motor 16 drives the ball screw 15 to rotate, thereby driving the sliding block 14 to move along the limit slide rail 18, so that the sampling needle 11 is moved horizontally above the ultrasonic cleaning cylinder 32. Then, the electric push rod 13 in the lifting assembly is activated to push the sampling needle 11 down, immersing the sampling needle 11 in the cleaning solution. The ultrasonic cleaning cylinder 32 starts cleaning. After the sampling needle 11 is cleaned, the control system can start the sampling pump 20 to extract the contents of the ultrasonic cleaning cylinder 32. The cleaning solution is guided to the first pipeline 23 via the first three-way valve 22 to clean the first preheating tank 25 and its connecting pipeline. The waste liquid is guided to be discharged from the drain pipe 30 via the second three-way valve 29. It can also be connected to the salinity meter 2 to clean the pipeline inside the salinity meter 2. After all pipelines are cleaned, the sampling pump 20 stops running. At this time, the sampling needle 11 is driven to rise by the electric push rod 13 until it stops in the middle of the exhaust pipe 37. At this time, the hot dryer 36 can be started to blow hot air through the annular exhaust pipe 37 to dry the sampling needle 11.

[0031] First sample processing cycle: Sampling and injection: After cleaning, the drive mechanism moves the sampling needle 11 above the first sample cup 4. The electric push rod 13 drives the sampling needle 11 to descend, pierce the cross-shaped incision of the sealing cap 5, and insert it below the sample liquid surface. The sampling pump 20 starts to extract a quantitative sample. Subsequently, the first three-way valve 22 switches the passage, and the sample is transported to the first preheating tank 25 through the first pipeline 23. The first preheating tank 25 begins to heat the sample to the set temperature.

[0032] Parallel cleaning and preparation: During the preheating of the first sample, the drive mechanism immediately moves the sampling needle 11 back to the ultrasonic cleaning cylinder 32 for cleaning and drying. At the same time, the control system can control the sampling pump 20 to draw cleaning fluid and switch to the second pipeline 24 through the first three-way valve 22 to clean the second preheating tank 26 and its pipeline, in preparation for the next sample.

[0033] Second sample processing and first sample analysis cycle: Second sample sampling: When the sample in the first preheating tank 25 is being heated, the drive mechanism controls the sampling needle 11 to move to the second sample cup 4 to extract the second sample. The second sample is transported to the cleaned second preheating tank 26 through the first three-way valve 22 and the second pipeline 24, and preheating begins.

[0034] First sample analysis: At this time, the first sample in the first preheating tank 25 has reached the analysis temperature. The control system controls the second three-way valve 29 at the bottom to switch and transport the preheated sample to the salinity meter 2 through the sample inlet tube 31 for analysis.

[0035] Post-analysis cleaning: After the first sample analysis is completed, the salinity meter 2 discharges waste liquid, and the system can restart the cleaning program to clean the first preheating tank 25, related pipelines, and the sample inlet flow path of the salinity meter 2 that were just used.

[0036] Subsequent cycle: After the salinity meter 2 completes the analysis and cleaning of the first sample, the second sample has been preheated in the second preheating tank 26 and can be immediately sent to the salinity meter 2 for analysis. At the same time, the sampling needle 11 can start to extract the third sample and send it to the first preheating tank 25, which has been cleaned, for preheating. This cycle is repeated to achieve parallel operation of analysis, preheating, and sampling / cleaning.

[0037] Throughout the process, the inner wall agitator 27 is activated during cleaning and preheating of the preheating tank to enhance the cleaning effect or heating efficiency, while the liquid storage tank 35 replenishes the cleaning fluid to the ultrasonic cleaning cylinder 32 through the replenishment pump 34 and the replenishment pipe 33 to ensure the smoothness of the cleaning process.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A fully automated salinity analysis system, comprising a frame (1) and a salinity meter (2) installed at the bottom of the inner cavity of the frame (1), wherein a touch panel (3) is obliquely installed on the right side of the top of the frame (1), characterized in that: The upper end of the inner cavity of the frame (1) is provided with a sampling component, which includes a rotating sample disk (7). The upper middle part of the rotating sample disk (7) is provided with multiple sets of sample cups (4) and a sampling needle (11) for extracting samples from the sample cups (4). The sampling needle (11) is connected to a sampling pump (20) through a hose. The output end of the sampling pump (20) is connected to a first preheating tank (25) and a second preheating tank (26) through a first pipeline (23) and a second pipeline (24), respectively. The first preheating tank (25) and the second preheating tank (26) are both connected to a salinity meter (2) through pipes. A cleaning assembly is provided on the left side of the back of the frame (1). The cleaning assembly includes an ultrasonic cleaning cylinder (32). The ultrasonic cleaning cylinder (32) is located at the left end of the rotating sample plate (7). A drying assembly is provided at the top center of the ultrasonic cleaning cylinder (32). The drying assembly includes a hot dryer (36). The air outlet of the hot dryer (36) is provided with an annular exhaust pipe (37). An inlet (38) is opened on the right side of the exhaust pipe (37). The exhaust pipe (37) is fixedly installed at the top center of the ultrasonic cleaning cylinder (32). The cleaning assembly also includes two sets of inner wall agitators (27), which are movably installed in the inner cavities of the first preheating tank (25) and the second preheating tank (26), respectively. The inner wall agitators (27) are driven by the cleaning motor (28). A driving mechanism is used to adjust the horizontal displacement and vertical movement of the sampling needle (11), and the driving mechanism includes a lifting component and a horizontal adjustment component; The lifting assembly includes an electric push rod (13), and the sampling needle (11) is fixedly installed at the bottom of the output end of the electric push rod (13) by a fixing bracket; the horizontal adjustment assembly includes a ball screw (15) and a sliding block (14) slidably installed on the surface of the ball screw (15). The electric push rod (13) is fixedly installed at the middle of the left end of the sliding block (14) by a fixing sleeve (12). The ball screw (15) is movably installed in the inner cavity of the frame (1) and is driven by a drive motor (16).

2. The fully automated salinity analysis system according to claim 1, characterized in that, The first preheating tank (25) and the second preheating tank (26) are equipped with a second three-way valve (29) at the bottom of the liquid outlet pipe. The outlet end of the second three-way valve (29) is equipped with a drain pipe (30) and a sample inlet pipe (31), respectively. The sample inlet pipe (31) is connected to the salinity meter (2).

3. The fully automated salinity analysis system according to claim 2, characterized in that, The sampling pump (20) has a delivery pipe (21) at its outlet port. The end of the delivery pipe (21) is connected to the first pipeline (23) and the second pipeline (24) respectively through the first three-way valve (22).

4. The fully automated salinity analysis system according to claim 3, characterized in that, The rotating sample disk (7) is movably installed in the inner cavity of the frame (1). The rotating sample disk (7) is driven by a rotating motor (6). The upper surface of the rotating sample disk (7) has multiple sets of placement slots (8) for placing sample cups (4) in a ring array. The top of the rotating sample disk (7) is provided with a pressure cap (9). The pressure cap (9) is raised and lowered by a cylinder (10). The inner center of the pressure cap (9) has multiple sets of through holes (91) corresponding to the placement slots (8).

5. The fully automated salinity analysis system according to claim 4, characterized in that, The sample cup (4) is equipped with a sealing cap (5) at the top opening. A sealing ring (51) is provided in the middle of the inner side of the sealing cap (5). A cross-shaped cut is provided in the middle of the inner side of the sealing ring (51).

6. The fully automated salinity analysis system according to claim 5, characterized in that, A limiting sliding assembly is provided at the middle of the right end of the sliding block (14). The limiting sliding assembly includes a limiting slide rail (18) and a limiting slider (17). The limiting slide rail (18) is fixedly installed on the support frame (19) inside the machine frame (1). The limiting slider (17) is fixedly connected to the sliding block (14), and the limiting slider (17) is slidably connected to the limiting slide rail (18).

7. The fully automated salinity analysis system according to claim 6, characterized in that, A liquid storage tank (35) is provided on one side of the bottom of the frame (1). The liquid storage tank (35) is located on the side of the salinity meter (2). The liquid storage tank (35) is connected to the ultrasonic cleaning cylinder (32) through a supply pump (34) and a supply pipe (33).

8. The fully automated salinity analysis system according to claim 7, characterized in that, A protective cover (39) is provided on the top left side of the frame (1). The protective cover (39) is made of transparent material and is hinged to the frame (1) by a hinge.

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