Full-automatic continuous distillation instrument

Abstract

The invention provides a full-automatic continuous distillation instrument and relates to the technical field of substance component analysis. The device specifically comprises a detection unit and a sample injector. The detection unit comprises a first frame body, and a distillation subassembly, a heating subassembly, an overturning subassembly, a cleaning subassembly, a receiving subassembly, a first liquid adding subassembly and a detection subassembly are arranged on the first frame body. A condenser and a distillation pipe of the distillation subassembly can move up and down, the overturning subassembly is used for driving the distillation flask to overturn, and the heating subassembly comprises a heating device capable of moving up and down. The receiving subassembly comprises a rotatable first workbench, a receiving bottle is arranged on the first workbench, and a receiving station of the receiving subassembly is located under the condenser. The sample injector comprises a rotatable second working table, and a sample bottle is arranged on the second working table. The sample injection part comprises a sample injection pipe capable of moving up and down and horizontally, and the sample injection pipe is connected with a sample injection pipe of the first liquid injection subassembly through a sample injection pump. The distillation instrument can meet the high-efficiency detection requirement of a large batch of samples.

Description

Technical Field

[0001] This invention relates to the field of material composition analysis technology, specifically a fully automatic continuous distillation apparatus. Background Technology

[0002] Distillation, as the most classic and reliable separation and purification technique, has long been widely used in chemical analysis, drug development, food safety, environmental monitoring and other related fields.

[0003] However, traditional distillation apparatus (such as a round-bottom flask + heating mantle + condenser combination) usually requires manual steps such as reagent addition, titration, volume adjustment, and flask cleaning. This not only has problems such as low automation and cumbersome operation procedures, but also easily introduces human error, resulting in poor repeatability of test results.

[0004] Furthermore, in certain specialized fields (such as monitoring deacidification effects and testing environmentally friendly foods), a large number of samples are generated with high frequency of testing. This characteristic directly amplifies the bottleneck of traditional manually operated distillation equipment. Faced with a large number of high-frequency samples, the inefficiency, uncontrollable errors, personnel workload, and safety risks of manual methods become particularly prominent. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a fully automated continuous distillation apparatus that can meet the high-efficiency distillation requirements for large batches of samples.

[0006] The technical solution adopted by this invention to solve its technical problem is: A fully automated continuous distillation apparatus, comprising a detection unit and a sample injector; The sampler includes a sample injection component and a second worktable. Multiple sample bottles are arranged on the second worktable, and the sample bottles can pass through the sample injection station in sequence and the sample to be tested is transported to the detection unit through the sample injection tube of the sample injection component. The detection unit includes a distillation section, a heating section, a tilting section, a cleaning section, a receiving section, a first liquid addition section, and a detection section; The first liquid addition section is used to receive the sample to be tested from the injector and add the sample to the distillation section for distillation. The heating section includes a heating device for heating the distillation flask of the distillation section. The aforementioned flipping assembly is used to drive the distillation flask to flip, thereby switching between the distillation station and the cleaning station. When the distillation flask is in the cleaning station, the mouth of the distillation flask faces downward, and the nozzle of the cleaning assembly cleans the inside of the distillation flask. The condenser, distillation tube, and heating device of the distillation assembly can move up and down, thereby providing space for the flipping of the distillation flask. The receiving unit includes a first workbench and a fifth driving component. Multiple receiving bottles are arranged on the first workbench. The receiving bottles pass through the receiving station and the testing station in sequence under the drive of the fifth driving component. The receiving bottle located at the receiving station is used to receive the condensed liquid produced by the distillation unit. The detection unit includes one or more of a titration component, a vision component, and a sampling component, used to detect the liquid at the detection station. During the detection process, the distillation flask is flipped to the cleaning station for cleaning in preparation for the distillation operation of the next sample, thus realizing continuous distillation.

[0007] Furthermore, the condenser is provided with a three-way valve at the condensate outlet, one outlet of which is a waste discharge port. The distillation tube includes a first connecting part, which is arranged obliquely downward along the direction close to the distillation flask. A flushing inlet is provided at the end of the first connecting part near the condenser.

[0008] Furthermore, the titration component includes a titration fixing rod and a fourth waste liquid tank. A burette is provided on the titration fixing rod. The tenth driving component is used to drive the titration fixing rod to move up and down and horizontally. The burette can be moved to the detection station or the fourth waste liquid tank under the drive of the tenth driving component. The vision component includes an industrial camera, and the lens of the industrial camera is oriented toward the inspection station; The sampling component includes a sampling fixing rod, on which a sampling tube is provided. The twelfth driving component is used to drive the sampling fixing rod to move up and down and horizontally. The sampling tube can move to the detection station under the drive of the twelfth driving component.

[0009] Furthermore, the injection tube includes an injection tube body, and an outer tube is provided around the injection tube body. A cavity interlayer is formed between the outer tube and the injection tube body. The upper part of the cavity interlayer is connected to a water inlet pipe, and the lower part is provided with an annular water outlet. The position of the annular water outlet is higher than the bottom end of the injection tube body during sampling. The sampling tube has the same structure as the injection tube.

[0010] Furthermore, the titration fixing rod is provided with a volume-fixing tube, which can be moved to the detection station or the fourth waste liquid tank under the drive of the tenth driving component. The vision component also includes an eleventh driving component for driving the industrial camera to move up and down.

[0011] Furthermore, a first weighing component is provided below the first workbench at the receiving station, and a first magnetic stirring component is provided below the first workbench at the testing station. The first magnetic stirring component includes a magnetic stirring motor, and a magnet fixing plate is provided on the power output shaft of the magnetic stirring motor. Magnets with opposite magnetic properties are respectively provided at both ends of the magnet fixing plate. A first magnetic rotor is provided inside the receiving bottle. A second magnetic stirring component with the same structure as the first magnetic stirring component is provided below the second workbench and upstream of the sample injection station. A second magnetic rotor is provided inside the sample bottle.

[0012] Furthermore, the injection component includes an injection fixing rod, and the injection tube is disposed on the injection fixing rod. The injection tube is connected to the injection tube of the first liquid addition unit through a pipeline and an injection pump. The injection component also includes an eleventh linear module. The upper end of the base of the eleventh linear module is provided with a mounting top plate. A bearing seat is rotatably disposed on the mounting top plate. A splined outer cylinder is disposed inside the bearing seat. A splined shaft that can move up and down relative to the splined outer cylinder is disposed inside the splined outer cylinder. The upper end of the splined shaft is connected to the injection fixing rod, and the lower end of the splined shaft is rotatably connected to a lifting fixing plate fixedly disposed on the slide table of the eleventh linear module. A third swing motor for driving the bearing seat to rotate is disposed on the mounting top plate. A second weighing component is disposed below the second worktable at the injection station.

[0013] Furthermore, the flipping assembly includes a rotating shaft and a second driving member for driving the rotating shaft to rotate, and the distillation flask is fixedly mounted on the rotating shaft by a connecting locking component; Below the heating device is a mounting slide that is slidably connected to the first frame of the detection unit. A drive screw is provided on the power output shaft of the lifting motor. A nut that cooperates with the drive screw is provided on the mounting slide. The heating device is slidably connected to the mounting slide. An elastic element is provided between the mounting slide and the heating device to prevent the heating device from moving downward relative to the mounting slide. The cleaning assembly includes a cleaning water tank and a nozzle bracket. The first end of the nozzle bracket is located inside the cleaning water tank, and the nozzle is disposed at the first end of the nozzle bracket. The second end of the nozzle bracket is located outside the cleaning water tank and is connected to the driving end of the fourth driving component. A drain outlet is provided at the bottom of the cleaning water tank, and a sensor is provided at the drain outlet of the cleaning water tank.

[0014] Furthermore, the heating unit also includes a steam generator. The distillation tube is connected to the mouth of the distillation flask via a flask conversion connector. The flask conversion connector includes a connecting body with a main channel extending through it. An air inlet pipe is provided on the connecting body. One end of the air inlet pipe extends to the outside of the connecting body and is connected to the steam outlet of the steam generator. The other end of the air inlet pipe extends into the distillation flask. The steam generator includes a heating tank and a water level cup. A heating rod is provided inside the heating tank, and a steam outlet is provided at the upper end of the heating tank. A liquid level sensor is provided inside the water level cup. The lower end of the water level cup is connected to the lower end of the heating tank, and the upper end of the water level cup is connected to the upper end of the heating tank.

[0015] Furthermore, the detection unit also includes a second liquid filling assembly, which includes a second liquid filling rod with a plurality of second liquid filling tubes. A ninth driving member is used to drive the second liquid filling rod to move up and down and horizontally. The second liquid filling tubes can move to the liquid filling station of the receiving assembly under the drive of the ninth driving member, and the liquid filling station is located upstream of the receiving station.

[0016] The beneficial effects of this invention are: 1. The fully automatic continuous distillation apparatus provided in this application embodiment can adapt to the high-efficiency distillation needs of large batches of samples in environmental food testing work related to ammonia nitrogen, cyanide, volatile phenols, alcohol content of wine, etc., and solves the bottleneck problem of traditional manual distillation devices. It can realize continuous, automatic and batch processing. This is not a simple efficiency improvement, but a necessary requirement to meet the testing and analysis needs of certain special fields.

[0017] 2. The fully automatic continuous distillation apparatus provided in this application integrates functions such as heating, distillation, condensation, receiving, endpoint determination, automatic cleaning of distillation tubes, automatic cleaning of distillation flasks, automatic sample addition, and automatic reagent addition into a single device, realizing "one-button start-up, unattended operation, data closed loop, and continuous process", becoming a standardized solution for the pretreatment process in modern automated laboratories.

[0018] 3. The fully automatic continuous distillation apparatus provided in this application embodiment can automatically complete the core steps such as sample and reagent addition, distillation, titration, and volume determination, eliminating subjective errors and deviations caused by manual operation, avoiding human interference from the source, greatly improving the repeatability and stability of test results, and solving the data fluctuation problem of traditional equipment.

[0019] 4. The fully automatic continuous distillation apparatus provided in this application embodiment has an automatic cleaning function, which can continuously process samples in batches. The processing efficiency is several times higher than that of the traditional manual mode, effectively breaking through the bottleneck of low sample processing efficiency, meeting the needs of high-frequency and large-scale screening, saving time for scientific evaluation and engineering management, and improving overall work efficiency.

[0020] 5. The application of a fully automatic continuous distillation apparatus provided in this application embodiment can free operators from tedious and repetitive work, reducing labor intensity and fatigue risk. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of a fully automatic continuous distillation apparatus provided in an embodiment of this application; Figure 2 This is a top view of the detection unit; Figure 3 This is a schematic diagram of the three-dimensional structure of the detection unit; Figure 4 An exploded view of the detection unit; Figure 5 for Figure 4 A magnified structural diagram of part A in the middle; Figure 6 This is a schematic diagram of the three-dimensional structure of the first frame; Figure 7 Schematic diagram of the installation structure of the distillation unit and the cleaning unit. Figure 1 ; Figure 8 Schematic diagram of the installation structure of the distillation unit and the cleaning unit. Figure 2 ; Figure 9 This is a structural diagram of the connecting locking components; Figure 10 This is a schematic diagram of the installation structure of the first waste liquid tank; Figure 11 Schematic diagram of the three-dimensional structure of the receiving unit Figure 1 ; Figure 12 Schematic diagram of the three-dimensional structure of the receiving unit Figure 2 ; Figure 13 This is a three-dimensional structural diagram of the first magnetic stirring component; Figure 14 A schematic diagram showing the positional relationship between the receiving bottle, the first worktable, and the first magnetic rotor; Figure 15 This is a schematic diagram of the installation structure of the sampling component and the titration component; Figure 16 A schematic diagram of the installation structure for the first liquid filling section; Figure 17A schematic diagram of the installation structure for the second liquid filling section; Figure 18 This is a cross-sectional view of the steam generator; Figure 19 This is a cross-sectional view of the injector; Figure 20 This is a schematic diagram of the internal structure of the sample injector. Figure 21 An exploded view of the sample injector; Figure 22 This is a cross-sectional view of the sample injection component.

[0022] In the diagram: 1. Detection unit; 111. First base plate; 1121. Lower crossbeam; 1122. Vertical beam; 1123. Upper crossbeam; 1124. First guide rail; 113. First connecting beam; 114. Second connecting beam; 1151. Cantilever beam; 1152. Longitudinal beam; 116. Mounting beam; 121. Distillation flask; 122. Condenser; 123. Distillation tube; 1231. First connecting part; 1232. Second connecting part; 1233. Third connecting part; 1234. Flushing inlet; 124. Condenser fixing plate; 125. First linear module; 126. Condenser mounting plate; 1261. Clamping plate; 1262. Second clamping seat; 127. Flask conversion connector; 1271. Connecting body; 1272. Gas inlet pipe; 128. Three-way valve; 1281. Extended connecting pipe; 1291. First waste liquid tank; 1292. First oscillating motor base; 1293. First oscillating motor; 131. Rotating shaft; 132. Connecting locking component; 1321. First clamping seat; 1322. First locking block; 1323. Second locking block; 13231. Limiting boss; 1324. Locking shaft; 13241. Baffle; 1325. Pressing block; 1326. First spring; 133. Tilting motor; 1331. Tilting motor base; 134. First transmission mechanism; 135. Tilting fixing plate; 141. Ceramic heating bowl; 1411. Guide post; 1412. First limiting plate; 142. Mounting slide; 1421. First slider; 1422. Nut; 143. Lifting motor; 1431. Drive screw; 144. Lifting motor base; 145. Second spring; 146. Steam generator; 1461. First mounting base; 1462. Heating tank; 1463. Water level cup; 1464. Heating rod; 1465. Liquid level sensor; 1466. First connecting pipe; 1467. Second connecting pipe; 151. Cleaning water tank; 1511. Water tank mounting base; 152. Nozzle; 153. Nozzle bracket; 1531. Second slider; 154. Mounting plate; 1541. Second guide rail; 155. Second linear module; 156. First connecting plate; 161. First worktable; 1611. First clearance hole; 162. Receiving bottle; 163. First electric rotary table; 164. First weighing component; 1641. First weighing sensor; 1642. Third linear module; 1643. First weighing mounting bracket; 1644. First weighing support; 171. First liquid filling unit; 1711. First liquid filling rod; 1712. Second waste liquid tank; 1713. Fourth linear module; 172. Second liquid filling unit; 1721. Second liquid filling rod; 1722. Fifth linear module; 1723. Sixth linear module; 1724. First extension rod; 1725. Third waste liquid tank; 181. Titration component; 1811. Titration fixing rod; 1812. Fourth waste liquid tank; 1813. Seventh linear module; 1814. Eighth linear module; 1815. Second extension rod; 1816. First magnetic stirring component; 18161. Magnetic stirring bracket; 18162. Magnetic stirring motor; 18163. Magnet fixing plate; 18164. Magnet; 18165. First magnetic rotor; 182. Vision component; 1821. Industrial camera; 1822. Ninth linear module; 183. Sampling component; 1831. Sampling fixing rod; 1832. Sampling tube; 1833. First cleaning tank; 1834. Tenth linear module; 1835. Second oscillating motor; 1836. Second oscillating motor base; 1837. Support frame; 191. Cooling water tank; 192. Refrigeration unit; 193. Second mounting base; 2. Injector; 21. Second worktable; 211. Second limiting plate; 212. Support plate; 2121. Second clearance hole; 213. Connecting column; 22. Sample vial; 23. Second electric rotary table; 24. Injection component; 241. Injection fixing rod; 242. Second cleaning tank; 243. Injection tube; 2431. Injection tube body; 2432. Outer tube; 2433. Cavity interlayer; 2434. Water inlet pipe; 244. Injection pump; 245. Eleventh linear module; 2451. Lifting fixing plate; 2461. Mounting top plate; 2462. Bearing seat; 2463. Splined outer cylinder; 2464. Splined shaft; 2465. Third swing motor; 2466. Second transmission mechanism; 2467. Bearing cover; 247. Third cleaning pump; 25. Second weighing component; 251. Second weighing sensor; 252. Twelfth linear module; 253. Second weighing mounting bracket; 254. Second weighing support; 26. Second magnetic stirring component; 271. Second base plate; 272. Outer shell; 2721. Third clearance hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings. The described embodiments are merely a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the protection scope of this application.

[0024] To facilitate understanding of the specific embodiments of this application, a coordinate system is now defined as follows: Figure 1 As shown, the left and right directions are horizontal, the front and back directions are vertical, and the up and down directions are vertical.

[0025] like Figure 1 As shown, a fully automated continuous distillation apparatus includes a detection unit 1 and a sample injector 2. A sample vial 22 containing the sample to be tested is located on the sample injector 2 and is transported to the detection unit 1 through the sample injector 2 for the corresponding detection process.

[0026] like Figure 2 , Figure 3 and Figure 4 As shown, the detection unit 1 includes a first frame, on which are arranged a distillation section, a heating section, a tilting section, a cleaning section, a receiving section, a first liquid addition section 171, and a detection section. The sample delivered to the detection unit 1 via the sampler 2 enters the distillation flask 121 of the distillation section through the first liquid addition section 171.

[0027] As one specific implementation method, such as Figure 6 As shown, in this embodiment (according to) Figure 1The first frame (in the coordinate system shown) includes a first base plate 111 and a structural frame mounted on the first base plate 111. The structural frame includes two uprights arranged front and rear, each upright including a lower crossbeam 1121 extending laterally. Two vertical beams 1122 extending vertically upwards are mounted on the lower crossbeam 1121, and an upper crossbeam 1123 is positioned between the two vertical beams 1122. For example, an upper crossbeam 1123 is positioned between the two vertical beams 1122, and the upper crossbeam 1123 of the rear upright is higher than that of the front upright. A first connecting beam 113 and a second connecting beam 114 are respectively positioned at the left and right ends of the two uprights. For example, two first connecting beams 113 are provided at the left end of the two uprights. The lower first connecting beam 113 is flush with the lower crossbeam 1121 of the upright, and the upper first connecting beam 113 is flush with the upper crossbeam 1123 of the front upright. A second connecting beam 114 is provided at the right end of the two uprights, and the second connecting beam 114 is located below the upper crossbeam 1123 of the front upright. The uprights, the first connecting beams 113 and the second connecting beam 114 together form the main frame of the structural frame, and a cantilever frame with a cantilever structure is provided on the left side of the main frame. For example, the cantilever frame includes two cantilever beams 1151 extending laterally. The rear cantilever beam 1151 is connected and fixed to the left vertical beam 1122 of the rear support, and the front cantilever beam 1151 is connected and fixed to the upper first connecting beam 113. A longitudinal beam 1152 is provided between the two cantilever beams 1151 at the cantilever end of the cantilever beam 1151, and both ends of the longitudinal beam 1152 are fixedly connected to the cantilever beam 1151. A mounting beam 116 extending downward perpendicularly to the longitudinal beam 1152 is provided at the middle position of the longitudinal beam 1152.

[0028] like Figure 4 , Figure 7 and Figure 8 As shown, the distillation unit includes a distillation flask 121, a condenser 122, and a distillation tube 123. One end of the distillation tube 123 is connected to the steam inlet of the condenser 122, and the other end of the distillation tube 123 is connected to the mouth of the distillation flask 121.

[0029] The condenser 122 is capable of moving up and down relative to the first frame, and the first frame is provided with a first driving member for driving the condenser 122 to move up and down relative to the first frame.

[0030] As one specific implementation method, according to Figure 1In this embodiment, a condenser fixing plate 124 is provided at the upper end of the rear upright of the first frame in the coordinate system shown. The first driving component is a first linear module 125. The base of the first linear module 125 is connected and fixed to the condenser fixing plate 124. A condenser mounting plate 126 is fixedly provided on the front side of the slide of the first linear module 125. The condenser 122 and the distillation tube 123 are both fixedly provided on the front side of the condenser mounting plate 126.

[0031] The aforementioned flipping assembly is used to flip the distillation flask 121. The flipping assembly includes a rotating shaft 131 rotatably mounted on the first frame and a second driving member for driving the rotating shaft 131 to rotate. The distillation flask 121 is fixedly mounted on the rotating shaft 131 via a connecting locking member 132. Driven by the rotating shaft 131, the distillation flask 121 has two working positions. When the distillation flask 121 is in the first working position, the mouth of the distillation flask 121 faces upwards and is aligned with the connecting end of the distillation tube 123. When the distillation flask 121 is in the second working position, the mouth of the distillation flask 121 faces downwards, and the nozzle 152 of the cleaning assembly extends into the distillation flask 121. Here, "downwards" can be directly below or diagonally below, as long as the water inside the distillation flask 121 can flow smoothly out through the mouth.

[0032] according to Figure 1 In the coordinate system shown, the first working position (distillation station) of the distillation flask 121 is located to the left of the second working position (cleaning station) of the distillation flask 121. The condenser 122 is located to the left of the distillation flask 121.

[0033] The second driving component includes a tilting motor 133 mounted on the first frame. The power output shaft of the tilting motor 133 is connected to one end of the rotating shaft 131 via a first transmission mechanism 134. For example, the first transmission mechanism 134 uses a synchronous belt drive. A driving pulley is mounted on the power output shaft of the tilting motor 133, and a driven pulley is mounted at the rear end of the rotating shaft 131. The driving pulley is connected to the driven pulley via a synchronous belt.

[0034] As one specific implementation method, according to Figure 1In this embodiment, the tilting assembly further includes a tilting fixing plate 135, and the front and rear ends of the tilting fixing plate 135 are respectively fixedly connected to the rear vertical beam 1122 of the support frame. The rotating shaft 131 is disposed on the left side of the tilting fixing plate 135, and the two ends of the rotating shaft 131 are respectively rotatably connected to the tilting fixing plate 135 through bearings. A tilting motor base 1331 is fixedly disposed on the right vertical beam 1122 of the rear support frame, and the tilting motor 133 is fixedly disposed on the tilting motor base 1331. A connecting locking component 132 for fixing the distillation flask 121 is located between the two supports. One end of the connecting locking component 132 is detachably fixedly connected to the rotating shaft 131, and the other end of the connecting locking component 132 is detachably fixedly connected to the distillation flask 121.

[0035] As one specific implementation method, such as Figure 9 As shown, the connecting locking component 132 in this embodiment includes a first clamping seat 1321 clamped and fixed on the rotating shaft 131. A first locking block 1322 is provided on the first clamping seat 1321, and a second locking block 1323 is hinged to the first locking block 1322. A locking assembly is provided between the first locking block 1322 and the second locking block 1323. Under the locking action of the locking assembly, the distillation flask 121 is clamped and fixed between the first locking block 1322 and the second locking block 1323.

[0036] In one specific embodiment, the locking assembly includes a locking shaft 1324, one end of which is hinged to the first locking block 1322, and the other end of which is provided with a baffle 13241. A pressing block 1325 and a first spring 1326 are sequentially sleeved on the locking shaft 1324 along the direction near the baffle 13241. The end of the second locking block 1323 is provided with a locking groove for accommodating the locking shaft 1324. In the locked state, the locking shaft 1324 is located within the locking groove, and the pressing block 1325 is pressed against the second locking block 1323 by the elastic force of the first spring 1326.

[0037] Furthermore, the second locking block 1323 is provided with limiting bosses 13231 on both the upper and lower sides of the opening end of the locking groove. In the locked state, the pressing block 1325 is restricted to the inner side of the limiting bosses 13231 (with the side closer to the distillation flask 121 as the inner side). By providing the limiting bosses 13231, the pressing block 1325 can be reliably restricted to the inner side of the limiting bosses 13231, thereby preventing the pressing block 1325 from slipping off the second locking block 1323.

[0038] The heating assembly includes a heating device located below the first working position of the distillation flask 121. The heating device contacts the distillation flask 121 and is used to heat the distillation flask 121. The heating device is slidably connected to the first frame via a sliding assembly, and a third driving member is provided between the heating device and the first frame for driving the heating device to move up and down.

[0039] As one specific implementation method, according to Figure 1 In this embodiment, a mounting slide 142 is provided below the heating device. A first guide rail 1124 is provided on the vertical beam 1122 on the right side of the upright. First sliders 1421, which cooperate with the corresponding first guide rails 1124, are provided at both the front and rear ends of the right side of the mounting slide 142. The third driving component includes a lifting motor 143 mounted on the first frame. A drive screw 1431 is fixedly mounted on the power output shaft of the lifting motor 143, and a nut 1422 cooperating with the drive screw 1431 is provided on the mounting slide 142. For example, a U-shaped lifting motor base 144 with an opening facing downwards is provided between the two uprights, and the lifting motor 143 is fixedly mounted on the web of the lifting motor base 144.

[0040] As one specific implementation, the heating device described in this embodiment is a ceramic heating bowl 141. The ceramic heating bowl 141 is existing technology and can be obtained directly by purchasing it. Its internal structure will not be described in detail here.

[0041] Furthermore, the heating device is slidably connected to the mounting slide 142, and an elastic element is provided between the mounting slide 142 and the heating device to prevent the heating device from moving downward relative to the mounting slide 142.

[0042] In one specific embodiment, the heating device in this embodiment is provided with downwardly extending guide posts 1411 at each of its four corners. The mounting slide 142 is provided with guide holes that cooperate with the guide posts 1411. A first limiting plate 1412 is provided on the guide post 1411 below the guide hole. The elastic element is a second spring 145 sleeved on the guide post 1411.

[0043] The cleaning unit is located below the second working position of the distillation flask 121. The cleaning unit includes a cleaning water tank 151, which is fixedly connected to the second connecting beam 114 of the first frame via a water tank fixing seat 1511. A nozzle 152 is installed inside the cleaning water tank 151, and the nozzle 152 is connected to a water source via a pipeline (not shown in the figure) and a first cleaning pump (not shown in the figure). Preferably, the nozzle 152 is a rotary nozzle. The rotary nozzle is prior art and can be directly obtained through external purchase; its specific structure will not be described in detail here.

[0044] Furthermore, the cleaning assembly also includes a nozzle bracket 153, the first end of which is located inside the cleaning water tank 151, the nozzle 152 is disposed at the first end of the nozzle bracket 153, and the second end of which is located outside the cleaning water tank 151 and connected to the driving end of the fourth driving member.

[0045] As one specific implementation method, according to Figure 1 In this embodiment, the fourth driving component is a second linear module 155. A mounting plate 154 is provided on the outer side of the right side wall of the cleaning water tank 151. The base of the second linear module 155 is connected and fixed to the mounting plate 154. The slide of the second linear module 155 is connected and fixed to the second end of the nozzle bracket 153 through a first connecting plate 156.

[0046] Furthermore, the mounting plate 154 is provided with a second guide rail 1541, and the nozzle bracket 153 is provided with a second slider 1531 that cooperates with the second guide rail 1541.

[0047] Furthermore, a drain outlet is provided at the bottom of the cleaning water tank 151.

[0048] Furthermore, a sensor (not shown in the figure) is installed at the drain outlet of the cleaning water tank 151. The sensor is used to detect the pH value and / or conductivity of the water discharged from the cleaning water tank 151. The cleaning status of the distillation flask 121 is determined by detecting the pH value or conductivity at the drain outlet. Specifically, one sensor for detecting the pH value can be installed at the drain outlet of the cleaning water tank 151, one sensor for detecting the conductivity can be installed, or two sensors can be installed at the drain outlet of the cleaning water tank 151, one for detecting the pH value and the other for detecting the conductivity.

[0049] Further, the distillation tube 123 includes a first connecting portion 1231, one end of which is provided with a downwardly extending second connecting portion 1232, which is connected to the steam inlet of the condenser 122. The other end of the first connecting portion 1231 is provided with a downwardly extending third connecting portion 1233, which is connected to the mouth of the distillation flask 121. The first connecting portion 1231 is arranged obliquely downward along the direction close to the distillation flask 121. A rinsing inlet 1234 is provided at the end of the first connecting portion 1231 near the condenser 122. The rinsing inlet 1234 is connected to a water source through a pipeline and a first cleaning pump. The outlet of the first cleaning pump is connected to the nozzle 152 and the rinsing inlet 1234 of the distillation tube 123 through a pipeline and a control valve (not shown in the figure).

[0050] Furthermore, such as Figure 4 , Figure 7 and Figure 18 As shown, the heating unit also includes a steam generator 146, and the distillation tube 123 is connected to the mouth of the distillation flask 121 via a flask conversion connector 127.

[0051] The flask conversion connector 127 includes a connecting body 1271, on which a main channel is provided axially through. During distillation, the vapor generated in the distillation flask 121 enters the distillation tube 123 through the main channel and then enters the condenser 122 through the distillation tube 123. The upper end of the main channel matches the shape of the connecting end of the distillation tube 123. When the end of the distillation tube 123 is inserted into the main channel, it fits tightly against the main channel, thus forming a sealed connection structure. The lower end of the outer side of the connecting body 1271 matches the shape of the mouth of the distillation flask 121. When the connecting body 1271 is inserted into the mouth of the distillation flask 121, it fits tightly against the mouth of the distillation flask 121, thus forming a sealed connection structure. The connecting body 1271 is provided with an air inlet pipe 1272. One end of the air inlet pipe 1272 extends to the outside of the connecting body 1271 and is connected to the steam outlet of the steam generator 146 through a pipeline (not shown in the figure) and a control valve (not shown in the figure). The other end of the air inlet pipe 1272 extends into the distillation flask 121. When steam heating is required, the control valve is opened, and the steam generated by the steam generator 146 flows into the distillation flask 121 through the air inlet pipe 1272. When steam heating is not required, the control valve is closed.

[0052] In one specific embodiment, the intake pipe 1272 in this embodiment includes a first pipe segment parallel to the connecting body 1271. The upper end of the first pipe segment is provided with a second pipe segment extending to one side perpendicular to the first pipe segment, and the second pipe segment extends through the side wall of the connecting body 1271 to the outside of the connecting body 1271.

[0053] In one specific embodiment, the condenser mounting plate 126 described in this embodiment is provided with two clamping plates 1261. The clamping plates 1261 are fixedly connected to the condenser mounting plate 126 by screws, and the connecting body 1271 of the flask conversion connector 127 is clamped and fixed between the two clamping plates 1261.

[0054] The steam generator 146 includes a first mounting base 1461, on which a heating tank 1462 and a water level cup 1463 are fixedly mounted. A heating rod 1464 is disposed inside the heating tank 1462, and a steam outlet is provided at the upper end of the heating tank 1462. A liquid level sensor 1465 is disposed inside the water level cup 1463. The lower end of the water level cup 1463 is connected to the lower end of the heating tank 1462 via a first connecting pipe 1466, and the upper end of the water level cup 1463 is connected to the upper end of the heating tank 1462 via a second connecting pipe 1467. The heating tank 1462 and the water level cup 1463 form a communicating vessel via a first connecting pipe 1466 and a second connecting pipe 1467. According to the principle of communicating vessels, the water level in the heating tank 1462 is level with the water level in the water level cup 1463. The water level in the heating tank 1462 can be obtained by detecting the water level in the water level cup 1463 using a liquid level sensor 1465. By using the water level cup 1463, not only can the water level in the heating tank 1462 be detected, but the high-temperature environment inside the heating tank 1462 can also prevent damage to the liquid level sensor 1465, extending its service life.

[0055] Furthermore, the bottom of the heating tank 1462 is provided with a drain outlet and a water inlet. The drain outlet is connected to the outside of the equipment through a pipeline and a control valve, and the water inlet is connected to a water source through a pipeline, a control valve, and a first water supply pump.

[0056] As one specific implementation method, according to Figure 1In this embodiment, the heating tank 1462 includes a tank body and a first cover plate. A first flange is provided at the upper end of the tank body, and the first cover plate is connected and fixed to the first flange. The water level cup 1463 includes a cup body and a second cover plate. A second flange is provided at the upper end of the cup body, and the second cover plate is connected and fixed to the second flange. The first mounting base 1461 includes a mounting portion, with downwardly extending support portions provided at its front and rear ends. Both the heating tank 1462 and the water level cup 1463 are mounted on the mounting portion, and the mounting portion is provided with seat holes for accommodating the heating tank 1462 and the water level cup 1463, respectively.

[0057] Furthermore, the first frame is also equipped with a cooling water tank 191 and a refrigeration unit 192 for heat exchange and cooling of the water in the cooling water tank 191. The cooling water tank 191 supplies cooling water to the condenser 122. A cooling coil (not shown in the figure) is installed inside the cooling water tank 191. The inlet and outlet of the refrigeration unit 192 are connected to the cooling coil, respectively. The refrigerant circulates between the refrigeration unit 192 and the cooling coil, and exchanges heat with and cools the water in the cooling water tank 191 through the cooling coil. The inlet and outlet of the cooling water tank 191 are connected to the cooling water outlet and cooling water inlet of the condenser 122 respectively through pipelines (not shown in the figure), and a circulation pump (not shown in the figure) circulates the cooling water between the cooling water tank 191 and the condenser 122.

[0058] In one specific embodiment, the cooling water tank 191 is located between the two uprights, and the left end of the cooling water tank 191 extends into the lifting motor base 144. The refrigeration unit 192 is located on the right side of the structural frame and is fixedly mounted on the first base plate 111. The first base plate 111 is provided with a second mounting seat 193 with a U-shaped structure and an opening facing downwards, and the second mounting seat 193 spans the refrigeration unit 192. The first mounting seat 1461 is fixedly mounted on the upper side of the web of the second mounting seat 193.

[0059] like Figure 4 , Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, the receiving part is installed at the left end of the first base plate 111 and is located below the cantilever frame.

[0060] The receiving unit includes a first worktable 161 and a fifth driving member for driving the first worktable 161 to rotate. A plurality of receiving bottles 162 are arranged circumferentially around the axis of rotation of the first worktable 161, and the mounting beam 116 is located within the circular area formed by the plurality of receiving bottles 162. Preferably, the plurality of receiving bottles 162 are evenly arranged circumferentially around the axis of rotation of the first worktable 161.

[0061] In one specific implementation, the fifth driving component in this embodiment is a first electric rotary table 163. The first electric rotary table 163 is fixedly mounted on the first base plate 111 via a rotary table mounting bracket. The first worktable 161 is fixedly mounted on the rotary table surface of the first electric rotary table 163 and can rotate at a fixed angle under the drive of the first electric rotary table 163. That is, the first worktable 161 rotates in a stepwise manner, and each rotation angle is 360° / N, where N is the number of receiving bottles 162.

[0062] The receiving station of the receiving unit is located directly below the condensate outlet of the condenser 122, and the receiving bottles 162 pass through the receiving station sequentially under the drive of the first electric rotary table 163. A first weighing component 164 is provided at the receiving station below the first workbench 161.

[0063] The first weighing component 164 includes a first weighing sensor 1641 and a sixth driving component for moving the first weighing sensor 1641 up and down. The weighing end of the first weighing sensor 1641 is located at the receiving station and below the first workbench 161. A first clearance hole 1611 is provided on the first workbench 161 below each receiving bottle 162. During distillation, the first weighing sensor 1641 moves upward under the drive of the sixth driving component, and the weighing end of the first weighing sensor 1641 lifts the receiving bottle 162 through the first clearance hole 1611, thereby weighing the condensate flowing into the receiving bottle 162 through the first weighing sensor 1641.

[0064] In one specific implementation, the sixth driving component in this embodiment is a third linear module 1642. The base of the third linear module 1642 is connected and fixed to the first connecting beam 113 located on the lower side via a first support. A first weighing mounting bracket 1643 is fixedly mounted on the slide of the third linear module 1642. The first weighing sensor 1641 is a cantilever beam sensor. The mounting end of the cantilever beam sensor is connected and fixed to the first weighing mounting bracket 1643, and the weighing end of the cantilever beam sensor is fixedly mounted with a first weighing support 1644. The first weighing sensor 1641 moves upward under the drive of the third linear module 1642, and the first weighing support 1644 extends upward into the first clearance hole 1611, thereby lifting the receiving bottle 162.

[0065] Furthermore, such as Figure 5 As shown, the condenser 122 has a three-way valve 128 at its condensate outlet, with the inlet of the three-way valve 128 connected to the condensate outlet of the condenser 122. The first outlet of the three-way valve 128 is connected to an extension pipe 1281. When the distillation tube 123 is connected to the distillation flask 121, the extension pipe 1281 is inserted into the receiving flask 162 located at the receiving station. The second outlet of the three-way valve 128 is connected to the outside of the equipment via a pipeline (not shown). During distillation, the condensate flows into the receiving flask 162 through the first outlet of the three-way valve 128 and the extension pipe 1281. When the first weighing component 164 detects that the weight in the receiving flask 162 reaches a set value, the three-way valve 128 switches to the second outlet, and the remaining condensate in the condenser 122 is discharged as waste through the second outlet and the pipeline. A second clamping seat 1262 for clamping the extension pipe 1281 is fixedly provided at the lower end of the condenser mounting plate 126.

[0066] Furthermore, to prevent condensate residue on the extended connecting pipe 1281 from dripping during the switching of receiving bottle 162, such as Figure 10As shown, the first frame is equipped with a first waste liquid tank 1291 and a seventh driving component for horizontally moving the first waste liquid tank 1291. Driven by the seventh driving component, the first waste liquid tank 1291 has two working positions: one at the receiving station and the other to one side of the receiving station. When switching receiving bottles 162, the condenser 122 moves upward under the drive of the first linear module 125, thereby pulling the extension tube 1281 out of the receiving bottle 162. After the extension tube 1281 is separated from the receiving bottle 162, the first waste liquid tank 1291 moves to the receiving station and is positioned below the extension tube 1281 to collect the condensed liquid dripping from the extension tube 1281. After the next receiving bottle 162 moves to the receiving station, the first waste liquid tank 1291 moves to the other working position, and then the condenser 122 moves downward.

[0067] In one specific embodiment, the seventh driving component in this embodiment includes a first swing motor base 1292, which is fixedly mounted on the left vertical beam 1122 of the rear support frame. A first swing motor 1293 is fixedly mounted on the first swing motor base 1292, and the first waste liquid tank 1291 is connected to the power output shaft of the first swing motor 1293.

[0068] like Figure 2 , Figure 3 , Figure 4 and Figure 15 As shown, the first liquid addition unit 171 is located behind the first working position of the distillation flask 121. The first liquid addition unit 171 includes a first liquid addition rod 1711, an eighth driving member for horizontally moving the first liquid addition rod 1711, and a second waste liquid tank 1712. A sample addition tube (not shown) is provided on the first liquid addition rod 1711, and the sample addition tube is connected to the injector 2. Driven by the eighth driving member, the sample addition tube can move to above the distillation flask 121 to add the sample to be tested into the distillation flask 121, or move to above the second waste liquid tank 1712 to empty the preceding sample in the pipeline. This avoids cross-contamination and ensures the reliability of the experimental results during sample switching.

[0069] In one specific implementation, the eighth driving component in this embodiment is a fourth linear module 1713. The base of the fourth linear module 1713 is connected and fixed to the upper crossbeam 1123 of the rear support through a second support. The rear end of the first liquid adding rod 1711 is connected and fixed to the slide of the fourth linear module 1713 through a second connecting plate. The sample adding tube is disposed on the front end of the first liquid adding rod 1711. The second waste liquid tank 1712 is fixedly disposed on the upper crossbeam 1123 of the rear support.

[0070] Furthermore, the front end of the first liquid dispensing rod 1711 is also provided with a plurality of first liquid dispensing tubes (not shown in the figure), and the plurality of first liquid dispensing tubes are respectively connected to the corresponding reagent bottles through pipelines (not shown in the figure) and first reagent pumps (not shown in the figure). The plurality of first liquid dispensing tubes do not share pipelines and first reagent pumps. The reason for this design is that in some experiments, it is necessary not only to add the sample to be tested into the distillation flask 121, but also to add the corresponding reagents. As a specific embodiment, in this embodiment, the front end of the first liquid dispensing rod 1711 is provided with a first liquid dispensing tube.

[0071] Furthermore, the first frame is also provided with a second liquid filling section 172, which is used to add reagents to the receiving bottle 162 at the liquid filling station of the receiving section. The liquid filling station is located upstream of the receiving station.

[0072] like Figure 2 , Figure 3 , Figure 4 and Figure 17 As shown, the second liquid addition unit 172 includes a second liquid addition rod 1721 and a ninth driving member. The ninth driving member is used to drive the second liquid addition rod 1721 to move up and down and horizontally. The second liquid addition rod 1721 is provided with several second liquid addition tubes (not shown in the figure). Each of these second liquid addition tubes can move to the liquid addition position under the drive of the ninth driving member and extend into the receiving bottle 162, thereby adding the corresponding reagent to the receiving bottle 162. Each of the several second liquid addition tubes is connected to the corresponding reagent bottle through a pipeline (not shown in the figure) and a second reagent pump (not shown in the figure). The several second liquid addition tubes do not share a pipeline or a second reagent pump. The reason for this design is that in some experiments, it is necessary to add an absorbent before receiving the condensate.

[0073] In one specific embodiment, the ninth driving component in this example includes a fifth linear module 1722 and a sixth linear module 1723. The fifth linear module 1722 is vertically arranged and used to drive the second liquid-filling rod 1721 to move up and down. The sixth linear module 1723 is horizontally arranged and used to drive the second liquid-filling rod 1721 to move horizontally. The base of the fifth linear module 1722 is connected and fixed to the left vertical beam 1122 of the rear support frame. The base of the sixth linear module 1723 is fixedly mounted on the slide of the fifth linear module 1722 via a third support. The rear end of the second liquid-filling rod 1721 is connected and fixed to the slide of the sixth linear module 1723 via a first extension rod 1724. The front end of the second liquid-filling rod 1721 is provided with two second liquid-filling pipes.

[0074] Furthermore, a third waste liquid tank 1725 is provided at the left end of the base of the sixth linear module 1723, and the second liquid inlet pipe can be moved above the third waste liquid tank 1725 under the drive of the sixth linear module 1723.

[0075] like Figure 2 , Figure 3 and Figure 4 As shown, the detection assembly includes a titration component 181, a vision component 182, and a sampling component 183.

[0076] The titration component 181 is used to add standard reagents to the receiving bottle 162 at the detection station of the receiving unit to carry out a titration experiment. The detection station is located downstream of the receiving station.

[0077] like Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, the titration component 181 includes a titration fixing rod 1811, a tenth driving member, and a fourth waste liquid tank 1812. A detachable burette (not shown in the figure) is fixedly mounted on the titration fixing rod 1811. The burette is connected to a standard reagent bottle (not shown in the figure) via a pipeline (not shown in the figure) and a titration pump (not shown in the figure). The tenth driving member is used to drive the titration fixing rod 1811 to move up and down and horizontally. The burette can move to the detection station under the drive of the tenth driving member and extend into the receiving bottle 162, thereby adding standard reagents to the receiving bottle 162 for titration experiments, or move to the top of the fourth waste liquid tank 1812.

[0078] In one specific embodiment, the tenth driving component in this example includes a seventh linear module 1813 and an eighth linear module 1814. The seventh linear module 1813 is vertically arranged to drive the titration fixing rod 1811 to move up and down. The eighth linear module 1814 is horizontally arranged to drive the titration fixing rod 1811 to move horizontally. The base of the seventh linear module 1813 is connected and fixed to the left vertical beam 1122 of the front support. The base of the eighth linear module 1814 is connected and fixed to the slide of the seventh linear module 1813 via a fourth support. The front end of the titration fixing rod 1811 is connected and fixed to the slide of the eighth linear module 1814 via a horizontally arranged second extension rod 1815. The burette is located at the rear end of the titration fixing rod 1811. The fourth waste liquid tank 1812 is fixedly located at the left end of the base of the eighth linear module 1814.

[0079] Furthermore, in order to ensure the accuracy of titration endpoint determination, a first magnetic stirring component 1816 is provided below the first workbench 161 at the detection station.

[0080] The first magnetic stirring component 1816 includes a magnetic stirring bracket 18161, on which a magnetic stirring motor 18162 is mounted. A detachable magnet fixing plate 18163 is fixedly mounted on the power output shaft of the magnetic stirring motor 18162. Magnets 18164 are respectively mounted at both ends of the magnet fixing plate 18163, and the magnetism of the two magnets 18164 is opposite. Each receiving bottle 162 is provided with a first magnetic rotor 18165, and the magnetism of the two ends of the first magnetic rotor 18165 is opposite. When the receiving bottle 162 rotates to the detection station, the first magnetic rotor 18165 in the receiving bottle 162 is fixed in position relative to the magnet fixing plate 18163 under the magnetic action of the two magnets 18164, and can rotate in the receiving bottle 162 under the drive of the magnetic stirring motor 18162, thereby stirring the liquid in the receiving bottle 162. By setting the first magnetic stirring component 1816 and stirring the liquid in the receiving bottle 162 during titration, the standard reagent dropped into the receiving bottle 162 can be quickly and evenly mixed with the liquid, thereby ensuring the accuracy of the titration endpoint determination.

[0081] like Figure 11 and Figure 12As shown, the vision component 182 includes an industrial camera 1821, with the lens of the industrial camera 1821 facing the receiving bottle 162 located at the detection station. During titration, the industrial camera 1821 observes the receiving bottle 162 in real time, capturing the sample state within the receiving bottle 162 and comparing it with the image of the titration endpoint stored in the control unit to determine the titration endpoint. This effectively improves the accuracy of titration endpoint determination and avoids errors caused by human operation.

[0082] Furthermore, a detachable volume-fixing tube (not shown in the figure) is fixedly installed at the rear end of the titration fixing rod 1811. The volume-fixing tube is connected to the volume-fixing reagent bottle (not shown in the figure) via a pipeline (not shown in the figure) and a volume-fixing pump (not shown in the figure). The volume-fixing tube can be moved to the detection station by the drive of the seventh linear module 1813 and the eighth linear module 1814, and extend into the receiving bottle 162, thereby adding volume-fixing reagent to the receiving bottle 162 for volume fixation, or move to the top of the fourth waste liquid tank 1812.

[0083] Furthermore, the vision component 182 also includes an eleventh driving component for moving the industrial camera 1821 up and down.

[0084] The eleventh driving component is provided for two reasons. First, if the receiving bottle 162 at the testing station is only included in the field of view using the wide-angle lens of the industrial camera 1821, the visual effect will vary depending on the angle, reducing the accuracy of the titration endpoint determination. The eleventh driving component adapts to receiving bottles 162 of different heights, ensuring that the height of the industrial camera 1821 is approximately consistent with the center position of the sample in the receiving bottle 162. Second, during volume determination, the center of the field of view of the industrial camera 1821 needs to be aligned with the target volume determination scale. The eleventh driving component moves the industrial camera 1821 up and down according to the target volume, thus achieving the volume determination function and ensuring accuracy.

[0085] In one specific implementation, the eleventh driving component in this embodiment is a ninth linear module 1822. The base of the ninth linear module 1822 is fixedly mounted on the mounting beam 116, and the slide of the ninth linear module 1822 faces forward. The industrial camera 1821 is connected and fixed to the slide of the ninth linear module 1822 via a third connecting plate.

[0086] like Figure 2 and Figure 15As shown, the sampling component 183 includes a sampling fixing rod 1831 and a twelfth driving member. A detachable sampling tube 1832 is fixedly mounted on the sampling fixing rod 1831. The sampling tube 1832 is connected to a sampling bottle (not shown) via a pipeline (not shown) and a sampling pump (not shown). The twelfth driving member is used to drive the sampling fixing rod 1831 to move up and down and horizontally. Under the drive of the twelfth driving member, the sampling tube 1832 can move to the detection station and extend into the receiving bottle 162 for sampling.

[0087] In one specific implementation, the twelfth driving component in this embodiment includes a tenth linear module 1834 and a second swing motor 1835. The tenth linear module 1834 is vertically arranged to drive the sampling fixing rod 1831 to move up and down, and the second swing motor 1835 is used to drive the sampling fixing rod 1831 to move horizontally. The base of the tenth linear module 1834 is connected and fixed to the left end of the front cantilever beam 1151 through a fifth support. The second swing motor 1835 is connected and fixed to the slide of the tenth linear module 1834 through a second swing motor seat 1836. One end of the sampling fixing rod 1831 is connected to the power output shaft of the second swing motor 1835, and the sampling tube 1832 is fixedly disposed at the other end of the sampling fixing rod 1831.

[0088] like Figure 19 , Figure 20 , Figure 21 and Figure 22 As shown, the sample injector 2 includes a second worktable 21 and a thirteenth driving member for driving the second worktable 21 to rotate. Multiple sample vials 22 for holding samples to be tested are arranged circumferentially around the rotation axis of the second worktable 21. Preferably, the multiple sample vials 22 are evenly arranged circumferentially around the rotation axis of the second worktable 21. Driven by the thirteenth driving member, the sample vials 22 can sequentially pass through the sample injection station.

[0089] In one specific implementation, the thirteenth driving component in this embodiment adopts a second electric rotary table 23. The second worktable 21 is fixedly disposed on the rotating surface of the second electric rotary table 23 and can rotate in a step manner under the drive of the second electric rotary table 23, and the angle of each rotation is 360° / N, where N is the number of sample bottles 22.

[0090] The front side of the second worktable 21 is provided with a sample feeding component 24.

[0091] The sample injection component 24 includes a sample injection fixing rod 241, a fourteenth driving member, and a second cleaning tank 242. A detachable sample injection tube 243 is fixedly mounted on the suspended end of the sample injection fixing rod 241. The sample injection tube 243 is connected to the sample addition tube of the detection unit 1 via a pipeline (not shown in the figure) and a sample injection pump 244. For example, the sample injection pump 244 is a peristaltic pump. The fourteenth driving member drives the sample injection fixing rod 241 to move vertically and horizontally. Under the drive of the fourteenth driving member, the sample injection tube 243 can move to the sample injection position of the injector 2 and extend into the sample vial 22 to extract the sample, or move above the second cleaning tank 242.

[0092] In one specific embodiment, the fourteenth driving component in this embodiment includes an eleventh linear module 245. A mounting top plate 2461 is fixedly mounted on the upper end of the base of the eleventh linear module 245. A bearing seat 2462 is mounted on the mounting top plate 2461, and the bearing seat 2462 is rotatably connected to the mounting top plate 2461 via a first bearing assembly. A splined outer cylinder 2463 is coaxially arranged within the bearing seat 2462, and the splined outer cylinder 2463 is detachably fixedly connected to the bearing seat 2462. The splined outer cylinder 2463 contains a splined shaft 2464 that can move up and down relative to the outer cylinder 2463. The upper end of the splined shaft 2464 is connected and fixed to the sample injection fixing rod 241, and the lower end of the splined shaft 2464 is rotatably connected to a lifting fixing plate 2451 fixed on the slide table of the eleventh linear module 245 via a second bearing assembly. The splined shaft 2464 has only one degree of freedom of rotation about its own axis relative to the lifting fixing plate 2451. A third swing motor 2465 is fixedly mounted on the mounting top plate 2461, and the power output shaft of the third swing motor 2465 is connected to the bearing seat 2462 via a second transmission mechanism 2466.

[0093] In one specific implementation, the second transmission mechanism 2466 described in this embodiment adopts synchronous belt drive. A drive pulley is provided on the power output shaft of the third swing motor 2465, and a detachable driven pulley is fixedly provided at the upper end of the bearing housing 2462. The drive pulley is connected to the driven pulley via a synchronous belt.

[0094] In one specific embodiment, the bearing housing 2462 described in this embodiment is a cylindrical structure with a closed upper end and an open lower end. The closed end of the bearing housing 2462 has a through hole allowing the splined shaft 2464 to pass through. The splined outer cylinder 2463 is located inside the bearing housing 2462 and is connected to the bearing housing 2462 via a flat key. A bearing cover 2467 is provided below the bearing housing 2462. The bearing cover 2467 is connected and fixed to the bearing housing 2462 by screws, and the bearing cover 2467 is pressed against the lower end face of the splined outer cylinder 2463. A mounting groove for accommodating the bearing housing 2462 is provided on the lower side of the driven pulley. The upper end of the bearing housing 2462 is inserted into the mounting groove and connected and fixed to the driven pulley by screws. The driven pulley has a through hole allowing the splined shaft 2464 to pass through.

[0095] In one specific implementation, the spline shaft 2464 and the third swing motor 2465 described in this embodiment are located on the left and right sides of the eleventh straight module 245, respectively.

[0096] Furthermore, to avoid cross-contamination of samples, the sample inlet tube 243 includes a sample inlet tube body 2431, with an outer tube 2432 surrounding the sample inlet tube body 2431. A cavity interlayer 2433 is formed between the outer tube 2432 and the sample inlet tube body 2431. A water inlet pipe 2434 is connected to the upper part of the cavity interlayer 2433, and an annular water outlet is provided at the lower part. The annular water outlet is positioned higher than the bottom end of the sample inlet tube body 2431 during sampling. The water inlet pipe 2434 is connected to a water source via a pipeline (not shown in the figure) and a third cleaning pump 247. By designing an outer tube 2432 on the outside of the sample inlet tube body 2431 and forming a cavity interlayer 2433, cleaning water can be easily introduced. The cleaning water thoroughly and evenly washes the outer wall of the sample inlet tube body 2431, which can quickly and thoroughly remove the liquid remaining on the outer wall of the tube body, thus eliminating the problem of cross-contamination from the source.

[0097] The sampling tube 1832 adopts the same structure as the inlet tube 243, and the structure of the sampling tube 1832 will not be described in detail here. The water inlet pipe of the sampling tube 1832 is connected to the water source through a pipeline (not shown in the figure) and a second cleaning pump (not shown in the figure). The sampling component 183 also includes a first cleaning tank 1833, and the sampling tube 1832 can move above the first cleaning tank 1833 under the drive of the twelfth driving member. As a specific embodiment, in this embodiment, the first cleaning tank 1833 is fixedly mounted on the first base plate 111 by a support frame 1837.

[0098] Furthermore, a second weighing component 25 is also provided below the second workbench 21 at the sample injection station. The second weighing component 25 includes a second weighing sensor 251 and a twelfth linear module 252 for moving the second weighing sensor 251 up and down. A second weighing mounting bracket 253 is fixedly mounted on the slide of the twelfth linear module 252. The second weighing sensor 251 is a cantilever beam sensor, with its mounting end connected and fixed to the second weighing mounting bracket 253. A second weighing support 254 is fixedly mounted on the weighing end of the cantilever beam sensor. A second clearance hole 2121 is provided below each sample vial 22 on the second workbench 21. When it is necessary to weigh the sample vial 22, the second weighing sensor 251 moves upward under the action of the twelfth linear module 252. The second weighing bracket 254 at the weighing end of the second weighing sensor 251 lifts the sample vial 22 through the second clearance hole 2121, thereby performing the weighing. During the sample injection process, the injection weight is controlled by reducing the weight of the detection reagent.

[0099] Furthermore, a second magnetic stirring component 26 is disposed below the second workbench 21 and upstream of the sample injection station, and each sample vial 22 is provided with a second magnetic rotor that cooperates with the second magnetic stirring component 26. The structure of the second magnetic stirring component 26 is the same as that of the first magnetic stirring component 1816, and the structure of the second magnetic stirring component 26 will not be described in detail here.

[0100] Furthermore, the second workbench 21 includes, from top to bottom, a second limiting plate 211 and a support plate 212, and the second limiting plate 211 and the support plate 212 are connected as a whole by a plurality of connecting posts 213. The second limiting plate 211 is provided with a limiting hole for accommodating the sample bottle 22, and the second clearance hole 2121 is provided on the support plate 212.

[0101] Furthermore, the sample injector 2 also includes a second base plate 271 and an outer shell 272. The second base plate 271 is connected and fixed to the outer shell 272, forming a cavity. The outer shell 272 includes a planar portion, and the second worktable 21 is located above the planar portion of the outer shell 272. The upper side wall of the planar portion is provided with a third clearance hole 2721 for avoiding the second magnetic stirring component 26 and the second weighing component 25. The front side of the planar portion is provided with a protrusion for accommodating the sample injector 24 and the twelfth linear module 252, and the upper side wall of the protrusion is provided with a through hole for accommodating the spline shaft 2464.

[0102] In one specific embodiment, the second cleaning tank 242 is fixedly mounted on the outer casing 272 and located on the left side of the protrusion. The sample injection pump 244 is fixedly mounted on the rear sidewall of the protrusion. The third cleaning pump 247 is fixedly mounted on the second base plate 271.

[0103] Furthermore, both the support plates 212 of the first workbench 161 and the second workbench 21 are provided with grooves, the first clearance hole 1611 is provided on the bottom surface of the groove of the first workbench 161, and the second clearance hole 2121 is provided on the bottom surface of the groove of the support plate 212.

[0104] Furthermore, a base support for supporting the receiving bottle 162 is provided in the groove of the first workbench 161, and a base support for supporting the sample bottle 22 is provided in the groove of the support plate 212. By providing base supports, it is possible to adapt to containers with different bottom shapes, thus expanding the applicability of this device.

[0105] As one specific implementation, in this embodiment, except for the eleventh linear module 245 which uses a synchronous belt linear module, all other linear modules use ball screw linear modules. Both synchronous belt linear modules and ball screw linear modules are existing technologies and can be obtained directly through external purchase; therefore, their internal structures will not be described in detail here.

[0106] The working process of a fully automatic continuous distillation apparatus is as follows: First, the sample vials 22 on the second workbench 21 pass through the injection station in sequence under the drive of the second electric rotary table 23, and the sample is transported to the injection tube of the first liquid addition section 171 by the injection pump 244, and the sample is added into the distillation flask 121 through the injection tube.

[0107] Second, as needed, the required reagents can be selectively added to the distillation flask 121 through the first adding tube, and at the same time, as needed, the required reagents can be selectively added to the receiving bottle 162 at the adding station through the second adding tube.

[0108] Third, the first liquid feeding rod 1711 retracts, and the condenser 122 and distillation tube 123 move downwards, connecting the flask conversion connector 127 to the distillation flask 121 on one hand, and extending the extension tube 1281 into the receiving bottle 162 at the receiving station on the other. Then, the distillation flask 121 can be selectively heated and distilled through the ceramic heating bowl 141 and / or the steam generator 146.

[0109] Fourth, after the condensate in the receiving bottle 162 reaches the preset weight, the remaining condensate in the condenser 122 is discharged through the second outlet of the three-way valve 128.

[0110] Fifth, cleaning water is injected into the distillation tube 123 through the flushing inlet 1234. Part of the water entering the distillation tube 123 flows into the condenser 122 to flush the condenser tube, and is finally discharged through the second outlet of the three-way valve 128. The other part flows into the distillation flask 121 along the first connecting part 1231, thereby flushing the distillation tube 123.

[0111] Sixth, after the condenser 122 and distillation tube 123 have been cleaned, move the condenser 122 and distillation tube 123 upwards together until the flask conversion connector 127 is disengaged from the distillation flask 121 and the extension tube 1281 is disengaged from the receiving flask 162. Then, perform the following two operations simultaneously: 6.1 The first workbench 161 rotates the receiving bottle 162 to the testing station and tests the liquid inside the receiving bottle 162. This testing process can select one or more of titration, volume determination, and sampling as needed.

[0112] 6.2 The heating device moves downwards, and the tilting assembly tilts the distillation flask 121 to the second working position. At this time, the water that flowed into the distillation flask 121 in step five is poured out into the cleaning water tank 151. Then, the nozzle 152 moves up and down to rinse and clean the inside of the distillation flask 121. After the distillation flask 121 is cleaned, it returns to the first working position. The heating device moves upwards to fit against the distillation flask 121. Then, the condenser 122 and the distillation tube 123 move downwards together, so that the flask conversion connector 127 is inserted into the distillation flask 121, and the extension tube 1281 is inserted into the receiving bottle 162 at the receiving station for the next sample experiment.

[0113] Other embodiments obtained by those skilled in the art based on the embodiments provided in this application by combining, splitting, or reorganizing the embodiments of this application do not exceed the protection scope of this application.

[0114] The above detailed embodiments have provided a detailed explanation of the purpose, technical solutions, and beneficial effects of the embodiments of this application. The above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. That is, any modifications, equivalent substitutions, improvements, etc., made on the basis of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A fully automatic continuous distillation apparatus, characterized in that: It includes a detection unit (1) and an injector (2); The injector (2) includes an injection component (24) and a second workbench (21). The second workbench (21) is provided with multiple sample bottles (22), and the sample bottles (22) can pass through the injection station in sequence and transport the sample to be tested to the detection unit (1) through the injection tube (243) of the injection component (24). The detection unit (1) includes a distillation section, a heating section, a tilting section, a cleaning section, a receiving section, a first liquid addition section (171), and a detection section; The first liquid addition unit (171) is used to receive the sample to be tested from the injector and add the sample to the distillation unit for distillation. The heating unit includes a heating device for heating the distillation flask (121) of the distillation unit. The aforementioned flipping assembly is used to drive the distillation flask (121) to flip, thereby switching between the distillation station and the cleaning station. When the distillation flask (121) is in the cleaning station, the mouth of the distillation flask (121) faces downward, and the nozzle (152) of the cleaning assembly cleans the inside of the distillation flask (121). The condenser (122) and distillation tube (123) of the distillation assembly, as well as the heating device, can move up and down, thereby providing space for the flipping of the distillation flask (121). The receiving unit includes a first workbench (161) and a fifth driving component. The first workbench (161) is provided with a plurality of receiving bottles (162). The receiving bottles (162) pass through the receiving station and the testing station in sequence under the drive of the fifth driving component. The receiving bottle (162) located at the receiving station is used to receive the condensed liquid produced by the distillation unit. The detection unit includes one or more of a titration component (181), a vision component (182), and a sampling component (183) for detecting the liquid at the detection station. During the detection process, the distillation flask (121) is flipped to the cleaning station for cleaning in preparation for the distillation operation of the next sample, thereby realizing continuous distillation.

2. The fully automatic continuous distillation apparatus according to claim 1, characterized in that: The condenser (122) is provided with a three-way valve (128) at the condensate outlet. One outlet of the three-way valve (128) is a waste discharge port. The distillation tube (123) includes a first connecting part (1231). The first connecting part (1231) is arranged obliquely downward along the direction close to the distillation flask (121). A flushing inlet (1234) is provided at the end of the first connecting part (1231) close to the condenser (122).

3. The fully automatic continuous distillation apparatus according to claim 1, characterized in that: The titration component (181) includes a titration fixing rod (1811) and a fourth waste liquid tank (1812). A burette is provided on the titration fixing rod (1811). The tenth driving component is used to drive the titration fixing rod (1811) to move up and down and horizontally. The burette can move to the detection station or the fourth waste liquid tank (1812) under the drive of the tenth driving component. The vision component (182) includes an industrial camera (1821), and the lens of the industrial camera (1821) is oriented toward the inspection station; The sampling component (183) includes a sampling fixing rod (1831), on which a sampling tube (1832) is provided. The twelfth driving component is used to drive the sampling fixing rod (1831) to move up and down and horizontally. The sampling tube (1832) can move to the detection station under the drive of the twelfth driving component.

4. The fully automatic continuous distillation apparatus according to claim 3, characterized in that: The sample inlet tube (243) includes a sample inlet tube body (2431), and an outer tube (2432) is provided around the sample inlet tube body (2431). A cavity interlayer (2433) is formed between the outer tube (2432) and the sample inlet tube body (2431). The upper part of the cavity interlayer (2433) is connected to a water inlet tube (2434), and the lower part is provided with an annular water outlet. The position of the annular water outlet is higher than the bottom end of the sample inlet tube body (2431) during sampling. The sampling tube (1832) has the same structure as the sample inlet tube (243).

5. The fully automatic continuous distillation apparatus according to claim 3, characterized in that: The titration fixing rod (1811) is provided with a volume-fixing tube, which can be moved to the detection station or the fourth waste liquid tank (1812) under the drive of the tenth driving component. The vision component (182) also includes an eleventh driving component for driving the industrial camera (1821) to move up and down.

6. The fully automatic continuous distillation apparatus according to claim 1, characterized in that: A first weighing component (164) is provided below the first workbench (161) at the receiving station. A first magnetic stirring component (1816) is provided below the first workbench (161) at the testing station. The first magnetic stirring component (1816) includes a magnetic stirring motor (18162). A magnet fixing plate (18163) is provided on the power output shaft of the magnetic stirring motor (18162). Magnets (18164) with opposite magnetic properties are provided at both ends of the magnet fixing plate (18163). A first magnetic rotor (18165) is provided inside the receiving bottle (162). A second magnetic stirring component (26) with the same structure as the first magnetic stirring component (1816) is provided below the second workbench (21) and upstream of the sample injection station. A second magnetic rotor is provided inside the sample bottle (22).

7. The fully automatic continuous distillation apparatus according to claim 1, characterized in that: The injection component (24) includes an injection fixing rod (241), and the injection tube (243) is disposed on the injection fixing rod (241). The injection tube (243) is connected to the injection tube of the first liquid addition unit (171) through a pipeline and an injection pump (244). The injection component (24) also includes an eleventh linear module (245). The upper end of the base of the eleventh linear module (245) is provided with a mounting top plate (2461). A bearing seat (2462) is rotatably disposed on the mounting top plate (2461). A splined outer cylinder (2463) is disposed inside the bearing seat (2462). A splined shaft (2464) capable of moving up and down relative to the splined outer cylinder (2463) is provided inside the splined outer cylinder (2463). The upper end of the splined shaft (2464) is connected to the sample injection fixing rod (241), and the lower end of the splined shaft (2464) is rotatably connected to the lifting fixing plate (2451) fixed on the slide table of the eleventh linear module (245). A third swing motor (2465) for driving the bearing seat (2462) to rotate is provided on the mounting top plate (2461). A second weighing component (25) is provided below the second worktable (21) on the sample injection station.

8. The fully automatic continuous distillation apparatus according to claim 1, characterized in that: The flipping assembly includes a rotating shaft (131) and a second driving member for driving the rotating shaft (131) to rotate. The distillation flask (121) is fixedly mounted on the rotating shaft (131) by a connecting locking member (132). Below the heating device is a mounting slide (142) that is slidably connected to the first frame of the detection unit. A drive screw (1431) is provided on the power output shaft of the lifting motor (143). A nut (1422) that cooperates with the drive screw (1431) is provided on the mounting slide (142). The heating device is slidably connected to the mounting slide (142), and an elastic element is provided between the mounting slide (142) and the heating device to prevent the heating device from moving downward relative to the mounting slide (142). The cleaning assembly includes a cleaning water tank (151) and a nozzle bracket (153). The first end of the nozzle bracket (153) is located inside the cleaning water tank (151), and the nozzle (152) is disposed at the first end of the nozzle bracket (153). The second end of the nozzle bracket (153) is located outside the cleaning water tank (151) and is connected to the driving end of the fourth driving component. A drain outlet is provided at the bottom of the cleaning water tank (151), and a sensor is provided at the drain outlet of the cleaning water tank (151).

9. The fully automatic continuous distillation apparatus according to claim 1, characterized in that: The heating unit also includes a steam generator (146). The distillation tube (123) is connected to the mouth of the distillation flask (121) via a flask conversion connector (127). The flask conversion connector (127) includes a connecting body (1271), on which a main channel is provided. An air inlet pipe (1272) is provided on the connecting body (1271). One end of the air inlet pipe (1272) extends to the outside of the connecting body (1271) and is connected to the steam outlet of the steam generator (146). The other end of 72) extends into the distillation flask (121). The steam generator (146) includes a heating tank (1462) and a water level cup (1463). A heating rod (1464) is provided inside the heating tank (1462). A steam outlet is provided at the upper end of the heating tank (1462). A liquid level sensor (1465) is provided inside the water level cup (1463). The lower end of the water level cup (1463) is connected to the lower end of the heating tank (1462), and the upper end of the water level cup (1463) is connected to the upper end of the heating tank (1462).

10. The fully automatic continuous distillation apparatus according to claim 1, characterized in that: The detection unit further includes a second liquid filling assembly (172), which includes a second liquid filling rod (1721). The second liquid filling rod (1721) is provided with a plurality of second liquid filling tubes. A ninth driving member is used to drive the second liquid filling rod (1721) to move up and down and horizontally. The second liquid filling tubes can move to the liquid filling station of the receiving assembly under the drive of the ninth driving member, and the liquid filling station is located upstream of the receiving station.

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