Online Karl Fischer coulometry water trace analyzer

Abstract

The invention relates to the technical field of moisture analyzers, and discloses an on-line Karl Fischer coulometry moisture micro-analyzer which comprises a machine body, an electrolytic tank is placed at the top of the machine body, a plurality of connectors are integrally formed on the outer wall of the top of the electrolytic tank, connecting rods are inserted into two of the connectors, and the connecting rods are connected with the electrolytic tank. Electrode bars are arranged at the bottom of the connecting bar through an adjusting mechanism, the two electrode bars are used for electrolysis and micromeasurement respectively, the adjusting mechanism is used for adjusting the height of the electrode bars, a wire electrically connected with the electrode bars is arranged at the top of the connecting bar, and the connecting bar and the connector are fixedly connected through a locking assembly. Through cooperative use of a plurality of components, an electrode bar can be detached for cleaning, the electrode bar can be fixed after being reinstalled, the electrode bar can be fixed more stably, silicone grease can be smeared more uniformly, and the trace detection accuracy of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of moisture analyzers, and particularly to an on-line Karl Fischer coulometric trace moisture analyzer. Background Art

[0002] A moisture analyzer is an instrument that separates or detects moisture in a sample by physical or chemical methods. The common detection methods include four types: Karl Fischer method, infrared drying method, microwave drying method, and resistance / capacitance method. Among them, the Karl Fischer method is suitable for trace moisture detection.

[0003] The electrode rod of the moisture analyzer needs to be cleaned regularly to ensure the measurement accuracy of the moisture analyzer. At present, the steps for cleaning the electrode rod include wiping the surface, soaking and cleaning with a cleaning solution, rinsing with pure water after cleaning, drying and activating after rinsing. At the same time, the steps of removing the silicone grease and reapplying the silicone grease to the connector at the top of the electrode rod are also required to reuse the electrode rod.

[0004] After retrieval, the Chinese patent with the publication number CN217484247U discloses an on-line coulometric trace moisture determination device, which can improve work efficiency, avoid the insecurity of offline analysis of special toxic and harmful samples and the harm to the physical health of laboratory personnel, and also save the labor cost and management cost brought by repeated experiments. However, there are still the following problems: 1. During the use of the electrode, especially after each use, organic substances are very likely to adhere to the electrode, which is not convenient for disassembling the electrode, resulting in inaccurate measurement data; 2. Since gases are generated during the use of the analyzer, sometimes due to the operator's misoperation, the gases accumulate in the electrolytic cell, which will increase the pressure of the electrolytic cell, easily push the electrode out, cause the position of the electrode to change, and easily damage the exchange membrane, resulting in the inability to use the electrolytic cell; 3. After cleaning the electrode, it is necessary to apply silicone grease at the connection between the electrode and the electrolytic cell. Manual application is prone to uneven application of the silicone grease, resulting in a poor sealing effect at the connection between the electrode and the electrolytic cell, thus affecting the measurement results. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides an on-line Karl Fischer coulometric trace moisture analyzer, mainly to solve the problems that during the use of the electrode, especially after each use, organic substances are very likely to adhere to the electrode, which is not convenient for disassembling the electrode, resulting in inaccurate measurement data, and after cleaning the electrode, it is necessary to apply silicone grease at the connection between the electrode and the electrolytic cell. Manual application is prone to uneven application of the silicone grease, resulting in a poor sealing effect at the connection between the electrode and the electrolytic cell, thus affecting the measurement results.

[0006] To achieve the above object, the present invention provides the following technical solutions: An on-line Karl Fischer coulometric trace moisture analyzer, comprising a body. An electrolytic cell is placed on the top of the body. A plurality of connectors are integrally formed on the outer wall of the top of the electrolytic cell. Two of the connectors are each inserted with a connecting rod. The bottom of the connecting rod is provided with an electrode rod through an adjusting mechanism. The two electrode rods are respectively used for electrolysis and trace measurement. The adjusting mechanism is used to adjust the height of the electrode rod. A wire electrically connected to the electrode rod is provided at the top of the connecting rod. The connecting rod and the connector are fixedly connected through a locking component, and the connection part thereof is a conical surface. A iron stand is fixed on one side of the body by bolts. The iron stand clamps a test tube. A fixing frame is fixed on the top of the body by bolts. A fixing tube is welded on the top of the fixing frame. A coating mechanism for coating silicone grease on the connection part of the connecting rod and the connector and a blocking component for sealing the test tube are provided on one side of the fixing tube. The coating mechanism and the blocking component are connected by a folding component.

[0007] Further, the adjusting mechanism includes a sliding hole opened at the bottom of the connecting rod. A sliding tube installed with the electrode rod is slidably connected in the sliding hole. A thread groove is opened at the top end of the circumferential outer wall of the sliding tube. A turning handle threadedly connected to the thread groove is rotatably connected to the middle part of the connecting rod. And a limiting component for enabling the sliding tube to only move up and down is provided in the sliding hole.

[0008] Based on the foregoing solution, the limiting component includes a limiting rod welded on the inner wall of the sliding hole. An avoidance groove is opened at the position where the limiting rod is flush with the turning handle. A guiding groove for placing the limiting rod is opened on the circumferential outer side of the sliding tube.

[0009] As a further solution of the present invention, the locking component includes a limiting ring adhered to the circumferential outer wall of the connecting rod. A groove is opened on the circumferential inner wall of the limiting ring. A fixing ring is adhered to the circumferential outer wall of the connector. A support frame inserted into the groove is adhered to the top of the fixing ring. An elastic cloth is adhered between the support frame and the fixing ring. Through holes are opened on the circumferential inner walls of the connector and the limiting ring. A sealing component for secondary sealing is provided between the connector and the connecting rod.

[0010] Further, the sealing component includes an installation groove opened on the circumferential inner wall of the connector. A sealing ring that can contact the connecting rod is placed in the installation groove.

[0011] On the basis of the foregoing solution, the smearing mechanism includes a carriage that slides on the outer wall of one side of the fixed tube. One end of the carriage is welded with a conical tube. A chute is opened on one side of the conical tube. A moving frame is slidably connected in the chute. One end of the moving frame is welded with a scraper. A pushing component for pushing the moving frame to move into the conical tube is arranged on the outer wall of one side of the conical tube. A rotating ring is rotatably connected to the top of the conical tube. A rubber ball that can contact the connecting rod is adhered to the inner circumferential wall of the rotating ring. A height-adjusting component for adjusting the height of the conical tube is arranged on the outer circumferential wall of the rotating ring. A nozzle for spraying silicone grease is fixed to the outer circumferential wall of the conical tube by bolts. A collecting groove is opened at the bottom end of the inner circumferential wall of the conical tube.

[0012] As a further solution of the present invention, the height-adjusting component includes a lead screw fixed to the inner wall of the bottom of the fixed tube by bolts. A sliding rod that slides in the fixed tube is sleeved on the outer circumferential wall of the lead screw. The top of the sliding rod is rotatably connected with a driven gear that is threadedly connected to the lead screw. A driving gear meshing with the driven gear and an annular block located above the driving gear are fixed to the outer circumferential wall of the rotating ring by bolts. A plurality of placing grooves are opened on the outer circumferential wall of the sliding rod. A ball is rolled in the placing groove.

[0013] Further, the pushing component includes a plurality of guide rods adhered to the outer wall of one side of the conical tube and slidably connected to the moving frame. A tension spring is fixed to the inner wall of one side of the moving frame by bolts, and the other end of the tension spring is fixed to the conical tube.

[0014] On the basis of the foregoing solution, the blocking component includes a rotating tube that rotates on the inner circumferential wall of the fixed tube. A sealing frame passing through the fixed tube is welded to the outer wall of one side of the rotating tube. An avoidance opening penetrating the sealing frame is opened at the top of the sealing frame. A plurality of arc-shaped grooves are opened on the inner circumferential wall of the rotating tube.

[0015] As a further solution of the present invention, the folding component includes a circular ring frame welded to one side of the fixed tube. A corrugated pipe is adhered to the top of the circular ring frame, and the other end of the corrugated pipe is fixed to the smearing mechanism.

[0016] Compared with the prior art, the present invention provides an on-line Karl Fischer coulometric moisture micro-analyzer, which has the following beneficial effects: 1. By the combined use of multiple components, the present invention can not only disassemble the electrode rod for cleaning, but also fix it after reinstalling the electrode rod, and make the fixing more stable. It can also smear silicone grease more evenly, improving the accuracy of the micro-detection of the device.

[0017] 2. By providing an adjusting mechanism, the present invention can adjust the height of the electrode rod, so that the electrode rod can be completely immersed in the electrolyte or cleaning solution, thereby achieving a better electrolysis effect or cleaning effect and improving the applicability of the device.

[0018] 3. The present invention is provided with a locking component. When the elastic cloth expands and deforms and enters the groove, the connecting rod is fixed, making it difficult for the connecting rod to be ejected from the joint, thereby improving the stability of the fixing of the electrode rod.

[0019] 4. The present invention is provided with a smearing mechanism. By rotating the rotating ring counterclockwise, the scraper can clean the remaining silicone grease from the previous time, and by rotating the rotating ring clockwise, the scraper can evenly smooth the silicone grease applied this time, thus realizing different functions.

[0020] 5. The present invention is provided with a height-adjusting component. The driven gear moves downward synchronously with the sliding rod and the conical tube, so that when the scraper scrapes the silicone grease, the electrode rod enters the cleaning liquid, improving the convenience of cleaning the device.

[0021] 6. The present invention is provided with a pushing component, so that the moving frame and the scraper are subjected to a continuous force moving into the conical tube, thereby cleaning the silicone grease at the connecting rod more cleanly and improving the cleaning degree of the silicone grease.

[0022] 7. The present invention is provided with a sealing component. The sealing frame can seal and store the cleaning liquid in the test tube, making it difficult for the cleaning liquid to volatilize and improving the service life of the cleaning liquid.

[0023] 8. The present invention is provided with a folding component, so that there is a protection between the test tube and the conical tube, preventing sundries from entering the cleaning liquid and improving the protection effect of the device.

[0024] 9. By the combined use of the smearing mechanism, the height-adjusting component, the pushing component and the folding component, after the connecting rod is inserted into the conical tube, only by rotating the rotating ring or the connecting rod forward and backward, the scraping, smearing and cleaning of the silicone grease on the connecting rod can be completed, reducing the workload of the staff and further reducing the risk of the connecting rod being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic three-dimensional structure diagram of an on-line Karl Fischer coulometric moisture micro-analyzer proposed by the present invention; Figure 2 is an enlarged structural diagram of the electrolytic cell of an on-line Karl Fischer coulometric moisture micro-analyzer proposed by the present invention; Figure 3 is an on-line Karl Fischer coulometric moisture micro-analyzer proposed by the present invention Figure 1 partial enlarged structural diagram; Figure 4 is a schematic cross-sectional view of the joint of an on-line Karl Fischer coulometric moisture micro-analyzer proposed by the present invention; Figure 5 is an on-line Karl Fischer coulometric moisture micro-analyzer proposed by the present invention Figure 4Schematic diagram of the enlarged structure of part A; Figure 6 Schematic diagram of the enlarged structure of the connecting rod of an on-line Karl Fischer coulometric micro water analyzer proposed by the present invention; Figure 7 An on-line Karl Fischer coulometric micro water analyzer proposed by the present invention Figure 6 Schematic diagram of the partial sectional structure; Figure 8 Schematic diagram of the enlarged structure of the corrugated pipe of an on-line Karl Fischer coulometric micro water analyzer proposed by the present invention; Figure 9 An on-line Karl Fischer coulometric micro water analyzer proposed by the present invention Figure 8 Schematic diagram of the partial enlarged structure; Figure 10 Schematic diagram of the sectional structure of the fixed tube of an on-line Karl Fischer coulometric micro water analyzer proposed by the present invention; Figure 11 Schematic diagram of the sectional structure of the rotating tube of an on-line Karl Fischer coulometric micro water analyzer proposed by the present invention; Figure 12 Schematic diagram of the enlarged structure of the conical tube of an on-line Karl Fischer coulometric micro water analyzer proposed by the present invention; Figure 13 Schematic diagram of the sectional structure of the conical tube of an on-line Karl Fischer coulometric micro water analyzer proposed by the present invention.

[0026] In the figure: 1, body; 2, electrolytic cell; 3, fixing bracket; 4, test tube; 5, iron stand; 6, joint; 7, connecting rod; 8, electric wire; 9, turning handle; 10, limiting ring; 11, fixing ring; 12, conical surface; 13, through hole; 14, support frame; 15, elastic cloth; 16, groove; 17, sealing ring; 18, installation groove; 19, sliding tube; 20, electrode rod; 21, limiting rod; 22, avoiding groove; 23, guiding groove; 24, thread groove; 25, sealing frame; 26, corrugated pipe; 27, conical tube; 28, fixed tube; 29, circular ring frame; 30, sliding frame; 31, sliding rod; 32, driven gear; 33, rotating tube; 34, avoiding port; 35, lead screw; 36, arc-shaped groove; 37, ball; 38, placing groove; 39, driving gear; 40, ring-shaped block; 41, rotating ring; 42, rubber ball; 43, sliding groove; 44, collecting groove; 45, moving frame; 46, tension spring; 47, guiding rod; 48, scraper; 49, spray head. Detailed implementation mode

[0027] In order to make the objectives, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0028] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any sequential or technical meaning. The terms "connection" and "coupling" as used in the present invention, unless otherwise specifically stated, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] Refer to Figures 1 - 13An online Karl Fischer coulometric moisture micro-analyzer includes a body 1, which is a common Karl Fischer coulometric moisture analyzer on the market. The Karl Fischer coulometric moisture analyzer is a prior art and will not be introduced in detail herein. The body 1 is electrically connected to an external control box to achieve online connection. The external control box is the control box mentioned in the cited patent document. An electrolytic cell 2 is placed on the top of the body 1. The top outer wall of the electrolytic cell 2 is integrally formed with a plurality of connectors 6. The plurality of connectors 6 are respectively connected to other connecting pipes on the analyzer, and two of the connectors 6 are inserted with connecting rods. 7, the bottom of the connecting rod 7 is provided with an electrode rod 20 through an adjustment mechanism, and the two electrode rods 20 are respectively an electrolysis electrode and a micro-measurement electrode, wherein the adjustment mechanism is used to adjust the height of the electrode rod 20, and the remaining joints 6 are respectively used to connect the liquid level electrode and the waste gas port, the balance liquid port, the reagent inlet, the waste liquid outlet, etc. of the sample inlet, the measuring electrolytic bottle, so that the electrolytic cell is called a complete measuring electrolytic bottle, and the top of the connecting rod 7 is provided with a wire 8 electrically connected to the electrode rod 20, and the wire 8 is electrically connected to the body 1, and the connecting rod 7 and the joint 6 are fixedly connected by a locking assembly, and the connection The joint is a conical surface 12. An iron frame 5 is fixed to one side of the body 1 by bolts. The iron frame 5 clamps a test tube 4. The test tube 4 contains a cleaning liquid dedicated to the electrode rod 20, such as the original electrode cleaning liquid of Mettler. A fixing frame 3 is fixed to the top of the body 1 by bolts. A fixing tube 28 is welded to the top of the fixing frame 3. A coating mechanism for coating the connection between the connecting rod 7 and the joint 6 with silicone grease and a sealing component for sealing the test tube 4 are provided on one side of the fixing tube 28. The coating mechanism and the sealing component are connected by a folding component. When the electrode rod 20 needs to be cleaned, the connecting rod is pulled out. 7, make the electrode rod 20 leave the electrolytic cell 2, then contact the sealing assembly to seal the test tube 4, put the electrode rod 20 into the test tube 4, and soak it for a period of time, use the coating mechanism to apply silicone grease to the connection between the connecting rod 7 and the joint 6, so as to realize automatic application of silicone grease, and the coating is more uniform, then reinsert the cleaned electrode rod 20 into the electrolytic cell 2, and use the locking assembly to fix the connecting rod 7, so that the connecting rod 7 will not be pushed out by the internal gas, thereby making the fixation of the electrode rod 20 more stable. Since the electrode rod 20 can be disassembled, it is more convenient to clean it.

[0031] In order to adjust the height of the electrode rod 20 in the test tube 4 or the electrolytic cell 2, in the present invention, the adjusting mechanism includes a sliding hole opened at the bottom of the connecting rod 7. A sliding tube 19 installed with the electrode rod 20 is slidably connected in the sliding hole. A threaded groove 24 is opened at the top of the outer circumference of the sliding tube 19. A rotating handle 9 threadedly connected to the threaded groove 24 is rotatably connected to the middle part of the connecting rod 7. And a limiting component for enabling the sliding tube 19 to only move up and down is arranged in the sliding hole. By rotating the rotating handle 9, under the action of the limiting component and the thread, the sliding tube 19 slides in the sliding hole, thereby adjusting the height of the electrode rod 20, enabling the electrode rod 20 to be completely immersed in the electrolyte or the cleaning liquid, and further achieving a better electrolysis effect or cleaning effect, and improving the applicability of the device.

[0032] In order to enable the sliding tube 19 to only slide up and down in the sliding hole, in the present invention, the limiting component includes a limiting rod 21 welded to the inner wall of the sliding hole. An avoidance groove 22 is opened at the position of the limiting rod 21 flush with the rotating handle 9. A guiding groove 23 for placing the limiting rod 21 is opened on the outer circumference of the sliding tube 19. Since the limiting rod 21 slides in the guiding groove 23, the sliding tube 19 cannot rotate, and thus the sliding tube 19 moves up and down during the rotation of the rotating handle 9, improving the adjustment stability of the device.

[0033] In order to fix the connecting rod 7 and the electrode rod 20, in the present invention, the locking component includes a limiting ring 10 adhesively bonded to the outer circumference of the connecting rod 7. A groove 16 is opened on the inner circumference of the limiting ring 10. A fixing ring 11 is adhesively bonded to the outer circumference of the joint 6. A support frame 14 inserted into the groove 16 is adhesively bonded to the top of the fixing ring 11. An elastic cloth 15 is adhesively bonded between the support frame 14 and the fixing ring 11. The elastic cloth 15 is latex or elastic rubber, preferably elastic rubber. Through holes 13 are opened on the inner circumferences of the joint 6 and the limiting ring 10. A sealing component for secondary sealing is arranged between the joint 6 and the connecting rod 7. When the connecting rod 7 is inserted into the joint 6, the support frame 14 will be inserted into the groove 16. At this time, the elastic cloth 15 is located in the groove 16. When the connecting rod 7 is inserted into the joint 6, the air between them will enter between the elastic cloth 15 and the connecting rod 7 through the through holes 13, thereby squeezing the elastic cloth 15 to expand and deform, and then entering the groove 16, thereby fixing the connecting rod 7 and making it difficult for the connecting rod 7 to be pushed out from the joint 6, improving the fixing stability of the electrode rod 20.

[0034] In order to perform secondary sealing on the connecting rod 7 and the joint 6, in the present invention, the sealing component includes a mounting groove 18 opened on the inner circumference of the joint 6. A sealing ring 17 that can contact the connecting rod 7 is placed in the mounting groove 18, further improving the sealing performance of the connection between the connecting rod 7 and the joint 6.

[0035] In order to apply silicone grease to the connecting rod 7, in the present invention, the applying mechanism includes a carriage 30 sliding on the outer wall of one side of the fixed tube 28. One end of the carriage 30 is welded with a conical tube 27. A chute 43 is opened on one side of the conical tube 27. A moving frame 45 is slidably connected in the chute 43. One end of the moving frame 45 is welded with a scraper 48. A pushing component for pushing the moving frame 45 into the conical tube 27 is provided on the outer wall of one side of the conical tube 27. A rotating ring 41 is rotatably connected to the top of the conical tube 27. A rubber ball 42 that can contact the connecting rod 7 is adhered to the inner circumferential wall of the rotating ring 41. A height-adjusting component for adjusting the height of the conical tube 27 is provided on the outer circumferential wall of the rotating ring 41. A nozzle 49 for spraying silicone grease is fixed to the outer circumferential wall of the conical tube 27 through bolts. The other end of the nozzle 49 is connected to a pneumatic dispenser. A collecting groove 44 is opened at the bottom end of the inner circumferential wall of the conical tube 27. The inner diameter of the collecting groove 44 is the same as the diameter of the connecting rod 7. When the connecting rod 7 is inserted into the conical tube 27, it will be squeezed and fixed by the rubber ball 42. At the same time, the scraper 48 contacts the connecting rod 7 under the action of the pushing component. The rotating ring 41 is rotated counterclockwise, and the rotating ring 41 drives the connecting rod 7 to rotate, cleaning the residual silicone grease on the surface of the connecting rod 7. Since the inner diameter of the collecting groove 44 is the same as the diameter of the connecting rod 7, the cleaned silicone grease will all fall into the collecting groove 44. Under the action of the height-adjusting component, the folding component will contract, so that the electrode rod 20 is inserted into the cleaning liquid, and then the electrode rod 20 is cleaned. After the cleaning is completed, the pneumatic dispenser is started, so that new silicone grease is sprayed from the nozzle 49 and falls on the connecting rod 7. The rotating ring 41 is rotated in reverse, and the scraper 48 levels the silicone grease, so that the application of the silicone grease is more uniform, improving the uniformity of the device application.

[0036] In order to realize the height adjustment of the conical tube 27, in the present invention, the height-adjusting component includes a lead screw 35 fixed to the inner wall of the bottom of the fixed tube 28 through bolts. A sliding rod 31 that slides in the fixed tube 28 is sleeved on the outer circumferential wall of the lead screw 35. The top of the sliding rod 31 is rotatably connected with a driven gear 32 that is threadedly connected to the lead screw 35. An active gear 39 meshing with the driven gear 32 and an annular block 40 located above the active gear 39 are fixed to the outer circumferential wall of the rotating ring 41 through bolts. A plurality of placing grooves 38 are opened on the outer circumferential wall of the sliding rod 31. A ball 37 rolls in the placing groove 38. When the rotating ring 41 rotates, it will drive the active gear 39 to rotate, thereby driving the driven gear 32 to rotate. Under the action of the thread, the driven gear 32 moves downward synchronously with the sliding rod 31 and the conical tube 27, so that the electrode rod 20 enters the cleaning liquid during the process of the scraper 48 scraping the silicone grease, improving the convenience of the device cleaning.

[0037] In order to move the moving frame 45 into the conical tube 27, in the present invention, the pushing assembly includes a plurality of guide rods 47 adhesively bonded to the outer wall on one side of the conical tube 27 and slidably connected to the moving frame 45. A tension spring 46 is fixed to the inner wall on one side of the moving frame 45 by bolts, and the other end of the tension spring 46 is fixed to the conical tube 27. When the connecting rod 7 enters the conical tube 27, the connecting rod 7 will squeeze the scraping plate 48 and the moving frame 45 to move outward, so that the tension spring 46 deforms to generate a pulling force, and further enables the moving frame 45 and the scraping plate 48 to receive a continuous force moving into the conical tube 27, thereby cleaning the silicone grease at the connecting rod 7 more thoroughly and improving the cleaning degree of the silicone grease.

[0038] In order to store the test tube 4, in the present invention, the sealing assembly includes a rotating tube 33 rotatably arranged on the inner circumference of the fixed tube 28. A sealing frame 25 passing through the fixed tube 28 is welded to the outer wall on one side of the rotating tube 33. An avoidance port 34 penetrating the sealing frame 25 is opened at the top of the sealing frame 25. A plurality of arc-shaped grooves 36 are formed in the inner circumference of the rotating tube 33, and the balls 37 are located in the arc-shaped grooves 36. During the downward movement of the sliding rod 31, the balls 37 will squeeze the arc-shaped grooves 36, causing the rotating tube 33 to rotate, and thus the sealing frame 25 to rotate, releasing the seal of the test tube 4, enabling the electrode rod 20 to pass through the avoidance port 34 and enter the cleaning liquid. After the cleaning liquid is used, the cleaning liquid is discharged from the test tube 4, and new cleaning liquid is refilled. The sealing frame 25 can seal and store the cleaning liquid in the test tube 4, making the cleaning liquid not easy to volatilize and improving the service life of the cleaning liquid.

[0039] In order to close between the coating mechanism and the sealing assembly, in the present invention, the folding assembly includes a circular ring frame 29 welded to one side of the fixed tube 28. A corrugated pipe 26 is adhesively bonded to the top of the circular ring frame 29, and the other end of the corrugated pipe 26 is fixed to the conical tube 27 in the coating mechanism. During the downward movement of the conical tube 27, the conical tube 27 will squeeze the corrugated pipe 26 to contract, and vice versa to extend, providing protection between the test tube 4 and the conical tube 27 to prevent foreign objects from entering the cleaning liquid and improving the protection effect of the device.

[0040] The present invention is used in the following steps: S1: When the electrode rod 20 needs to be cleaned, the connecting rod 7 is pulled out, the electrode rod 20 is removed from the electrolytic cell 2, and the visible contaminants on the surface of the electrode rod 20 are wiped with blotting paper. After wiping, the connecting rod 7 and the electrode rod 20 are inserted into the conical tube 27. The connecting rod 7 will be fixed by being squeezed by the rubber ball 42, and at the same time, the scraping plate 48 contacts the connecting rod 7. S2: Rotate the swivel ring 41 or the connecting rod 7 counterclockwise to synchronously rotate the swivel ring 41 and the connecting rod 7, thereby cleaning the residual silicone grease on the surface of the connecting rod 7. Since the inner diameter of the collection groove 44 is the same as the diameter of the connecting rod 7, the cleaned silicone grease will all fall into the collection groove 44. At the same time, the rotation of the swivel ring 41 will drive the rotation of the driving gear 39, thereby driving the rotation of the driven gear 32. Under the action of the thread, the driven gear 32, the slide rod 31, and the conical tube 27 move downward synchronously; S3: During the downward movement of the slide rod 31, the ball 37 will squeeze the arc-shaped groove 36, causing the rotating tube 33 to rotate, thereby causing the sealing frame 25 to rotate, releasing the seal on the test tube 4, enabling the electrode rod 20 to pass through the avoidance port 34 and enter the cleaning liquid, and completely covering the sensitive part of the electrode with the cleaning liquid; S4: After soaking for a period of time, start the pneumatic dispenser so that new silicone grease is sprayed from the nozzle 49 and lands on the connecting rod 7. Reverse the swivel ring 41, and the scraper 48 levels the silicone grease, thereby making the application of the silicone grease uniform; S5: At the same time, the rotation of the swivel ring 41 will drive the rotation of the driving gear 39, thereby driving the rotation of the driven gear 32. Under the action of the thread, the driven gear 32, the slide rod 31, and the conical tube 27 move upward synchronously; S6: During the downward movement of the slide rod 31, the ball 37 will squeeze the arc-shaped groove 36, causing the rotating tube 33 to rotate, thereby causing the sealing frame 25 to rotate. When the electrode rod 20 is above the sealing frame 25, the sealing frame 25 will seal the test tube 4; S7: Remove the connecting rod 7 and the electrode rod 20 from the conical tube 27. At the same time, pour out the cleaning liquid in the test tube 4, rinse the cleaning liquid on the surface of the electrode rod 20 with pure water, gently wipe the cleaned electrode rod 20 with a fiber-free soft cloth, then place it in pure water to activate for a period of time to restore the response ability of the sensitive membrane of the electrode rod 20, and reinsert the electrode rod 20 into the electrolytic cell 2; S8: After the electrode rod 20 is reinserted into the electrolytic cell 2, rinse the residue of the cleaning on the inner wall of the test tube 4 with pure water. Wipe the rinsed test tube 4 with a fiber-free soft cloth to make the inner wall free of residual water stains. Then add a sufficient amount of cleaning liquid to the test tube 4 and reinstall it for easy cleaning next time. It can replace the cleaning liquid in the test tube 4 without affecting the analyzer detection, reduce the exposure time of the electrode rod 20 outside, and further reduce the risk of contamination of the electrode rod 20; S9: When the connecting rod 7 is inserted into the joint 6, the support frame 14 will be inserted into the groove 16. At this time, the elastic cloth 15 is located in the groove 16. When the connecting rod 7 is inserted into the joint 6, the air between them will enter between the elastic cloth 15 and the connecting rod 7 through the through hole 13, thereby squeezing the elastic cloth 15 to expand and deform, and then enter the groove 16, thereby fixing the connecting rod 7 and making it difficult for the connecting rod 7 to be ejected from the joint 6; S10: After the installation is completed, the device can be used to continue with trace detection. Since the electrode rod 20 can be disassembled, it is more convenient to clean it, and at the same time, its sealing performance and cleanliness can be ensured.

[0041] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0042] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An online Karl Fischer coulometric moisture microanalyzer, comprising a body (1), an electrolytic cell (2) being placed on the top of the body (1), characterized in that: The top outer wall of the electrolytic cell (2) is integrally formed with a plurality of joints (6), wherein two joints (6) are inserted with connecting rods (7), and the bottom of the connecting rods (7) is provided with electrode rods (20) through an adjustment mechanism, and the two electrode rods (20) are used for electrolysis and micro-measurement respectively, wherein the adjustment mechanism is used to adjust the height of the electrode rods (20), and the top of the connecting rods (7) is provided with electric wires (8) electrically connected to the electrode rods (20), and the connecting rods (7) and the joints (6) are fixedly connected by a locking assembly, and The connection is a conical surface (12). An iron frame (5) is fixedly connected to one side of the machine body (1). The iron frame (5) holds a test tube (4). A fixed frame (3) is fixedly connected to the top of the machine body (1). A fixed tube (28) is fixedly connected to the top of the fixed frame (3). A coating mechanism for coating silicone grease at the connection between the connecting rod (7) and the joint (6) and a sealing component for sealing the test tube (4) are provided on one side of the fixed tube (28). The coating mechanism and the sealing component are connected via a folding component.

2. An online Karl Fischer coulometric moisture microanalyzer according to claim 1, characterized in that: The adjustment mechanism comprises a sliding hole formed at the bottom of the connecting rod (7), a sliding tube (19) on which the electrode rod (20) is mounted being slidably connected in the sliding hole, a threaded groove (24) being formed at the top of the circumferential outer wall of the sliding tube (19), a turning handle (9) threadedly connected to the threaded groove (24) being rotatably connected in the middle portion of the connecting rod (7), and a limit assembly for enabling the sliding tube (19) to move only up and down being provided in the sliding hole.

3. An online Karl Fischer coulometric moisture trace analyzer according to claim 2, characterized in that: The limit assembly comprises a limit rod (21) fixedly connected to the inner wall of the slide hole, a avoidance groove (22) is provided at a position where the limit rod (21) is flush with the turning handle (9), and a guide groove (23) for placing the limit rod (21) is provided on the outer side of the circumference of the slide tube (19).

4. An online Karl Fischer coulometric moisture microanalyzer according to claim 1, characterized in that: The locking assembly comprises a limiting ring (10) fixedly connected to the circumferential outer wall of the connecting rod (7); a groove (16) is provided on the circumferential inner wall of the limiting ring (10); a fixing ring (11) is fixedly connected to the circumferential outer wall of the joint (6); a support frame (14) inserted into the groove (16) is fixedly connected to the top of the fixing ring (11); an elastic cloth (15) is fixedly connected between the support frame (14) and the fixing ring (11); a through hole (13) is provided on the circumferential inner wall of the joint (6) and the limiting ring (10); and a sealing assembly for secondary sealing is provided between the joint (6) and the connecting rod (7).

5. An online Karl Fischer coulometric moisture trace analyzer according to claim 4, characterized in that: The sealing assembly comprises a mounting groove (18) formed on the inner circumferential wall of the joint (6), wherein a sealing ring (17) capable of contacting the connecting rod (7) is placed in the mounting groove (18).

6. An online Karl Fischer coulometric moisture microanalyzer according to claim 1, characterized in that: The smearing mechanism comprises a slide frame (30) which slides on the outer wall of one side of the fixed tube (28); one end of the slide frame (30) is fixedly connected to the conical tube (27); a slide groove (43) is provided on one side of the conical tube (27); a movable frame (45) is slidably connected in the slide groove (43); one end of the movable frame (45) is fixedly connected to a scraper (48); and a push member (45) is provided on the outer wall of one side of the conical tube (27) to push the movable frame (45) to move into the conical tube (27). The top of the conical tube (27) is rotatably connected to a swivel (41), the circumferential inner wall of the swivel (41) is fixedly connected to a rubber ball (42) that can contact the connecting rod (7), the circumferential outer wall of the swivel (41) is provided with a height adjustment component for adjusting the height of the conical tube (27), the circumferential outer wall of the conical tube (27) is fixedly connected to a nozzle (49) for spraying silicone grease, and the bottom end of the circumferential inner wall of the conical tube (27) is provided with a collecting groove (44).

7. An online Karl Fischer coulometric moisture microanalyzer according to claim 6, characterized in that: The height adjustment assembly comprises a screw rod (35) fixedly connected to the inner wall of the bottom of the fixed tube (28); a slide rod (31) sliding in the fixed tube (28) is sleeved on the circumferential outer wall of the screw rod (35); a driven gear (32) threadedly connected to the screw rod (35) is rotatably connected to the top of the slide rod (31); a driving gear (39) meshing with the driven gear (32) and a ring-shaped block (40) located above the driving gear (39) are fixedly connected to the circumferential outer wall of the rotating ring (41); a plurality of placement grooves (38) are formed on the circumferential outer wall of the slide rod (31), and balls (37) roll in the placement grooves (38).

8. An online Karl Fischer coulometric moisture microanalyzer according to claim 6, characterized in that: The pushing assembly comprises a plurality of guide rods (47) fixedly connected to the outer wall of one side of the conical tube (27) and slidably connected to the moving frame (45); a tension spring (46) is fixedly connected to the inner wall of one side of the moving frame (45), and the other end of the tension spring (46) is fixed to the conical tube (27).

9. An online Karl Fischer coulometric moisture microanalyzer according to claim 1, characterized in that: The blocking assembly comprises a rotating tube (33) rotating on the circumferential inner wall of a fixed tube (28); a sealing frame (25) passing through the fixed tube (28) is fixedly connected to an outer wall on one side of the rotating tube (33); a top of the sealing frame (25) is provided with an escape opening (34) passing through the sealing frame (25); and a plurality of arc-shaped grooves (36) are provided on the circumferential inner wall of the rotating tube (33).

10. An online Karl Fischer coulometric moisture microanalyzer according to claim 1, characterized in that: The folding assembly comprises a circular frame (29) fixedly connected to one side of a fixed tube (28); a bellows (26) is fixedly connected to the top of the circular frame (29); and the other end of the bellows (26) is fixed to the smearing mechanism.

Images