An instrument for detecting residual sulfur dioxide in traditional Chinese medicine

Abstract

The application discloses a kind of instruments for traditional Chinese medicine sulfur dioxide residual detection, it is related to traditional Chinese medicinal material detection technical field, including host computer, still including distilling flask, it is set to the top of host computer, for containing sample to be measured;Condensing component is set to the top of distilling flask, including condenser and sleeve, the sleeve is fixedly arranged in the inside of condenser and condenser is divided into water cavity and condensing cavity.The condensing cavity is divided into upper condensing section and lower condensing section by separating portion, can effectively block heat spread to entire condensing cavity, make upper condensing section and lower condensing section maintain certain temperature difference, ensure that after once condensation gas in upper condensing section can be effectively condensed, to improve the condensing effect of distillation gas, and by twice condensation can further reduce the hydrochloric acid component doped in gas, avoid hydrochloric acid component follow nitrogen and sulfur dioxide into absorption bottle to cause influence to absorption liquid, improve the accuracy of detection.

Description

Technical Field

[0001] This invention relates to the field of traditional Chinese medicine testing technology, and in particular to an instrument for detecting sulfur dioxide residues in traditional Chinese medicine. Background Technology

[0002] In existing technologies, the acid-base titration method is one of the main methods for detecting sulfur dioxide. Its detection principle is as follows: the sample is treated by nitrogen distillation. After acidification, the sample releases sulfur dioxide from a series of substances such as sulfites under heating conditions. The distillate is absorbed by hydrogen peroxide solution, and the sulfur dioxide in the gas is oxidized to sulfate ions. The sample is then titrated with a sodium hydroxide standard solution, and the sulfur dioxide content in the sample is calculated based on the amount of sodium hydroxide standard solution consumed.

[0003] A fully automated sulfur dioxide analyzer, disclosed in CN115684465A, includes several pretreatment units and a supply unit. Each pretreatment unit comprises a distillation flask and a heat source. The distillation flask holds the sample, and the heat source heats it. Each pretreatment unit corresponds to a sample cup, and the output of each pretreatment unit extends to its corresponding sample cup. The supply unit includes a pretreatment supply unit and a sample cup supply unit. The advantages of this design are: precise control of nitrogen input flow using a proportional valve ensures accurate and reliable experimental results; far-infrared radiation heating technology provides energy saving, waterproofing, and resistance to acid and alkali corrosion; high distillation efficiency and good condensation effect; and the use of a gas separator, multi-port valve, and titration arm allows for sample testing from multiple distillation flasks. The instrument boasts a high degree of automation, eliminating the need for manual monitoring and reducing labor costs.

[0004] In the aforementioned patent, during the condensation of distilled gas, heat easily spreads upwards along the condenser tube, causing the overall temperature within the condensation chamber to rise and tend to be uniform. Since the condensation section lacks temperature variation, the distilled gas can only undergo single-stage condensation within the condensation chamber, resulting in incomplete condensation. Furthermore, during the acidification process, some organic acids may volatilize, and if the hydrochloric acid reaction is incomplete, it will also volatilize. If these organic acids or hydrochloric acid vapors cannot be completely condensed and refluxed, they will follow the distilled gas into the absorption liquid, affecting the accuracy of the detection. Moreover, the condensed liquid will be re-recirculated back into the distillation flask for repeated distillation and volatilization, thus reducing distillation efficiency and hindering the efficient and stable operation of the distillation process.

[0005] Therefore, it is necessary to invent an instrument for detecting sulfur dioxide residues in traditional Chinese medicine to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an instrument for detecting sulfur dioxide residues in traditional Chinese medicine, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an instrument for detecting sulfur dioxide residues in traditional Chinese medicine, comprising a main unit, and further comprising: a distillation flask disposed on the top of the main unit for holding the sample to be tested; a condensation assembly disposed on the top of the distillation flask, comprising a condenser tube and a sleeve, the sleeve being fixedly disposed inside the condenser tube and dividing the condenser tube into a water passage chamber and a condensation chamber; a partition disposed inside the condensation chamber and dividing the condensation chamber into an upper condensation section and a lower condensation section, the partition comprising a fixed seat and a movable seat, the fixed seat and the movable seat being mutually engaged and disengaged, capable of adjusting the on / off state between the upper condensation section and the lower condensation section; a nitrogen blowing assembly disposed on the side of the distillation flask for filling the distillation flask with nitrogen; and an absorption bottle disposed on the top of the main unit for absorbing sulfur dioxide gas.

[0008] Preferably, the condensation assembly further includes: an air inlet and an air outlet, wherein the air inlet is located at the bottom of the condenser tube and is connected to the top of the distillation flask, and the air outlet is located at the top of the condenser tube, and both the air inlet and the air outlet are connected to the condensation chamber; and a water inlet and a water outlet, wherein the water inlet is located at the bottom side of the condenser tube, and the water outlet is located at the top side of the condenser tube, and both the water inlet and the water outlet are connected to the water passage chamber.

[0009] Preferably, the condensation assembly further includes: a circulating water inlet located on one side of the top of the main unit; a circulating water outlet located on the other side of the top of the main unit; the circulating water outlet and the water outlet, and the circulating water inlet and the water inlet are connected by water guide pipes; and a collection pipe, one end of which is connected to the air outlet, and the other end of which is placed inside the absorption bottle.

[0010] Preferably, the partition further includes: an air passage that extends through the interior of the fixed seat; both the fixed seat and the movable seat are disposed inside the sleeve, with the movable seat located above the fixed seat; and a reset member that is fixedly disposed between the fixed seat and the movable seat, the reset member being used to provide a pulling force that brings the fixed seat and the movable seat closer to each other.

[0011] Preferably, the partition further includes: an expansion portion fixedly disposed on the outer periphery of the movable seat; a cavity formed inside the movable seat, wherein the expansion portion and the cavity are connected by a through groove; an elastic compression member fixedly disposed at the bottom of the cavity; a guide rod fixedly disposed at the bottom of the elastic compression member and extending through to the bottom of the movable seat; and a guide groove formed at the top of the fixed seat, wherein the bottom of the guide rod is slidably disposed within the guide groove.

[0012] Preferably, the partition further includes a guide groove, which is formed on the side of the movable seat and corresponds to the position of the air passage, and the guide groove is used to guide the gas ejected from the air passage.

[0013] Preferably, the partition further includes: a sealing ring, which is fixedly sleeved on the outside of the fixing seat and maintains a sliding seal with the inner wall of the sleeve; a receiving groove, which is opened on the top of the fixing seat, and the bottom end of the reset member is fixedly disposed at the bottom of the receiving groove, the receiving groove being used to store the reset member; and a hanging ring, which is fixedly disposed at the bottom of the fixing seat.

[0014] Preferably, the nitrogen blowing assembly includes: a nitrogen blowing tube, which is connected to the side of the distillation flask; a nitrogen inlet, which is located on the top of the main unit; the nitrogen blowing tube and the nitrogen inlet are connected by a gas guide tube.

[0015] Preferably, it further includes: a heating unit disposed on the top of the main unit, with the distillation flask placed inside the heating unit; and a separating funnel fixedly disposed on the top of the nitrogen blowing tube, with the bottom of the separating funnel penetrating the nitrogen blowing tube and extending into the interior of the distillation flask.

[0016] Preferably, the top of the host is provided with a mounting bracket, and a clamping hoop is fixedly provided on the mounting bracket.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. This invention divides the condensation chamber into an upper condensation section and a lower condensation section through a partition, which can effectively prevent heat from spreading to the entire condensation chamber and maintain a certain temperature difference between the upper and lower condensation sections. This ensures that the gas after one condensation is effectively condensed in the upper condensation section, thereby improving the condensation effect on the distilled gas. Furthermore, the double condensation can further reduce the hydrochloric acid content in the gas, preventing hydrochloric acid from entering the absorption bottle along with nitrogen and sulfur dioxide and affecting the absorption liquid, thus improving the accuracy of detection. When the expansion section expands, it can fit tightly against the inner wall of the sleeve, so that the upper and lower condensation sections are in an independent state, effectively preventing external impurities from entering the distillation bottle through the condensation chamber and ensuring the cleanliness of the detection instrument.

[0019] 2. The present invention separates the expansion part from the inner wall of the sleeve and forms an annular gap, so that the distilled gas after primary condensation moves upward along the inner wall of the sleeve in a thin annular airflow shape when passing through the annular gap, thereby improving the condensation efficiency between the distilled gas and the upper condensation section and enhancing the secondary condensation effect of the distilled gas.

[0020] 3. By setting the fixing seat to a "convex" structure and forming a space for containing liquid between it and the inner wall of the sleeve, the liquid formed after secondary condensation is stored in the space, which avoids the condensate containing hydrochloric acid from flowing back into the distillation flask for repeated distillation and evaporation. At the same time, it can prevent the temperature inside the distillation flask from changing due to the condensate flowing back, thus ensuring the efficient and stable operation of the distillation process.

[0021] 4. By setting an adjustable partition inside the sleeve, the present invention allows the operator to pre-adjust the position of the partition according to the condensation of each sample, thereby setting the distribution of the upper and lower condensation sections and meeting the different needs when testing different samples. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0024] Figure 3 This is a schematic diagram of the distillation flask and condenser of the present invention.

[0025] Figure 4 This is a schematic cross-sectional view of the condenser tube of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the fixed seat and the movable seat of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure of the movable seat of the present invention.

[0028] Figure 7 This is a cross-sectional structural diagram of the movable seat of the present invention.

[0029] Figure 8 For the present invention Figure 4 A magnified structural diagram of point A in the middle.

[0030] Figure 9 This is a schematic diagram showing the state when the fixed seat and the movable seat of the present invention are in contact.

[0031] Figure 10 This is a schematic diagram showing the state when the fixed seat and the movable seat of the present invention are detached.

[0032] In the diagram: 1. Main unit; 2. Distillation flask; 3. Condensation assembly; 301. Condenser tube; 302. Sleeve; 303. Water passage chamber; 304. Condensation chamber; 305. Air inlet; 306. Air outlet; 307. Water inlet; 308. Water outlet; 309. Circulating water inlet; 310. Circulating water outlet; 311. Water guide pipe; 312. Collection pipe; 4. Divider; 401. Fixed base; 402. Movable base; 403. Gas passage; 404. Reset component; 405. Expansion section; 406. Cavity; 407. Through groove; 408. Elastic extrusion component; 409. Guide rod; 410. Guide groove; 411. Flow guide groove; 412. Sealing ring; 413. Receiving groove; 414. Hanging ring; 5. Nitrogen blowing assembly; 501. Nitrogen blowing pipe; 502. Nitrogen inlet; 503. Gas guide pipe; 6. Absorption bottle; 7. Heating section; 8. Separating funnel; 9. Mounting bracket; 10. Clamping clamp. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] This invention provides, for example Figures 1 to 10 The instrument shown is for detecting sulfur dioxide residues in traditional Chinese medicine. It includes a main unit 1, with a mounting frame 9 on top. The height of the mounting frame 9 is adjustable according to actual usage requirements. A clamping hoop 10 is fixedly mounted on the mounting frame 9. A heating element 7 is located on top of the main unit 1. The heating element 7 can be a far-infrared ceramic heating jacket or a fiberglass electric heating jacket, possessing characteristics of flamelessness, corrosion resistance, and acid and alkali resistance. Its heating power can be adjusted according to actual needs. The instrument also includes:

[0035] Distillation flask 2 is located on top of main unit 1 and is placed inside heating unit 7; it is used to hold the sample to be tested, and heating unit 7 is adjusted to heat distillation flask 2.

[0036] The condenser assembly 3 is located at the top of the distillation flask 2.

[0037] Specifically, the condenser assembly 3 includes: a condenser tube 301 and a sleeve 302. The condenser tube 301 is snapped into the inside of the clamping clamp 10, and the sleeve 302 is fixedly installed inside the condenser tube 301, dividing the condenser tube 301 into a water passage chamber 303 and a condensation chamber 304. The water passage chamber 303 and the condensation chamber 304 are independent of each other. The water passage chamber 303 is used to contain condensate, and the condensation chamber 304 is used to condense distilled gases. Gases other than sulfur dioxide are condensed into liquid in the condensation chamber 304. An inlet 305 and an outlet 306 are also included. The inlet 305 is located at the bottom of the condenser tube 301 and is connected to the top of the distillation flask 2. The outlet 306 is located at the top of the condenser tube 301. Both the inlet 305 and the outlet 306 are connected to the condensation chamber 304. Finally, a water inlet 307 and an outlet 308 are included. The water inlet 307 is located at the bottom side of the condenser tube 301. The outlet 308 is located on the top side of the condenser tube 301. Both the inlet 307 and the outlet 308 are connected to the water passage chamber 303. The circulating water inlet 309 is located on one side of the top of the main unit 1. The circulating water outlet 310 is located on the other side of the top of the main unit 1. The circulating water outlet 310 and the outlet 308, and the circulating water inlet 309 and the inlet 307 are connected by a water guide pipe 311. Both the circulating water inlet 309 and the circulating water outlet 310 are connected to the water circulation system to achieve a continuous supply of condensate. The circulating water system includes a circulating water tank and a water pump. The circulating water system is existing technology and will not be described in detail here, nor is it shown in the figure. The collection pipe 312 is connected at one end to the gas outlet 306 and at the other end inside the absorption bottle 6. After passing through the condenser chamber 304, sulfur dioxide gas enters the absorption bottle 6 through the collection pipe 312.

[0038] The partition 4 is disposed inside the condensing cavity 304 and divides the condensing cavity 304 into an upper condensing section and a lower condensing section.

[0039] Specifically, the partition 4 includes: a fixed seat 401 and a movable seat 402. The portion below the fixed seat 401 is the lower condensing section, and the portion above the movable seat 402 is the upper condensing section. The fixed seat 401 and the movable seat 402 are mutually fitted and separated, allowing adjustment of the on / off state between the upper and lower condensing sections. The fixed seat 401 has a convex structure, and the fixed seat 401 and the inner wall of the sleeve 302 cooperate to form a space for containing liquid; and an air passage 403, which is opened through the fixed seat 401. Inside the sleeve 302, multiple air passages 403 can be evenly arranged according to actual needs; both the fixed seat 401 and the movable seat 402 are located inside the sleeve 302, with the movable seat 402 positioned above the fixed seat 401. When the movable seat 402 and the fixed seat 401 are in contact, the contact surfaces between them are sealed; the reset member 404 is fixedly disposed between the fixed seat 401 and the movable seat 402, and the reset member 404 is used to provide a pulling force that brings the fixed seat 401 and the movable seat 402 closer together; the expansion part 405... It is fixedly disposed on the outer periphery of the movable seat 402. When the expansion part 405 expands outward, it can fit tightly against the inner wall of the sleeve 302. When the expansion part 405 contracts, it disengages from the inner wall of the sleeve 302, forming an annular gap between the inner wall of the sleeve 302 and the movable seat 402. The cavity 406 is opened inside the movable seat 402 and is pre-filled with gas. The expansion part 405 and the cavity 406 are connected by a through groove 407. The elastic extrusion member 408 is fixedly disposed at the bottom of the cavity 406. When the elastic extrusion member 408 protrudes upward, it will compress the gas in the cavity 406, thereby causing the expansion part 405 to expand. The elastic extrusion member 408 itself is elastic, and when it is not subjected to external force, the elastic extrusion member 408 will automatically return to the horizontal state and no longer protrude upward. The guide rod 409 is fixedly set at the bottom of the elastic extrusion member 408 and extends through to the bottom of the movable seat 402. The guide groove 410 is opened at the top of the fixed seat 401, and the bottom of the guide rod 409 is slidably set in the guide groove 410.

[0040] More specifically, the partition 4 also includes: a guide groove 411, which is opened on the side of the movable seat 402 and corresponds to the position of the air passage 403. The guide groove 411 is used to guide the gas ejected from the air passage 403. The gas preferentially moves upward along the guide groove 411. After being guided by the guide groove 411, the distilled gas enters the upper condensing section along the inner wall of the sleeve 302 in an intermittent airflow. The gas blowing force received by the part of the sleeve 302 corresponding to the guide groove 411 is greater than that of other parts. With this arrangement, when the distilled gas condenses into liquid in the upper condensing section, it can smoothly leave along the inner wall of the sleeve 302 from the airflow interval, so that the condensate can flow back downward; a sealing ring 412, which is fixedly sleeved on the outside of the fixed seat 401 and corresponds to the sleeve 302. The inner walls of the two parts maintain a sliding seal, and the sealing ring 412 and the sleeve 302 are in an interference fit state. During the test, the sealing ring 412 will not change position due to the impact of gas pressure. The receiving groove 413 is opened on the top of the fixed seat 401. The bottom end of the reset part 404 is fixedly set at the bottom of the receiving groove 413. The receiving groove 413 is used to store the reset part 404. When the fixed seat 401 and the movable seat 402 are tightly fitted, the reset part 404 is completely hidden in the receiving groove 413. The hanging ring 414 is fixedly set at the bottom of the fixed seat 401. The operator can insert the tool from the air inlet 305 into the condensation chamber 304 and hang it on the hanging ring 414 to adjust the position of the fixed seat 401.

[0041] The nitrogen blowing assembly 5 is located on the side of the distillation flask 2 and is used to fill the distillation flask 2 with nitrogen.

[0042] Specifically, the nitrogen blowing assembly 5 includes: a nitrogen blowing pipe 501, which is connected to the side of the distillation flask 2; a nitrogen inlet 502, which is located on the top of the main unit 1; the nitrogen blowing pipe 501 and the nitrogen inlet 502 are connected by a gas guide pipe 503, and the nitrogen inlet 502 is connected to a nitrogen generator to achieve a continuous supply of nitrogen. The nitrogen generator is existing technology and will not be described in detail here, nor is it shown in the figure.

[0043] Absorption bottle 6, which is located on top of main unit 1, is used to absorb sulfur dioxide gas.

[0044] Separating funnel 8 is fixedly installed at the top of nitrogen blow-off tube 501, and the bottom of separating funnel 8 penetrates nitrogen blow-off tube 501 and extends into the interior of distillation flask 2.

[0045] In summary, when using this instrument, the sample to be tested is placed in distillation flask 2, hydrochloric acid is added to distillation flask 2 through separatory funnel 8, nitrogen gas is simultaneously introduced into distillation flask 2 through nitrogen blowing tube 501, and circulating water is continuously introduced into water passage chamber 303 through water inlet 307 and water outlet 308. The sample in distillation flask 2 is heated to boiling, and the distilled gas enters condensation chamber 304 through gas inlet 305. Distilled gases other than sulfur dioxide are converted into liquid state in condensation chamber 304. Under the guidance of nitrogen gas, sulfur dioxide enters absorption bottle 6 through gas outlet 306 and collection tube 312, so that sulfur dioxide dissolves in absorption liquid. Then, titration is performed through absorption liquid to detect the sulfur dioxide content.

[0046] It should be noted that the above is a description of testing a set of samples. Staff can set up multiple sets of distillation flasks 2, condenser components 3, nitrogen blowing components 5, and absorption bottles 6 according to actual needs to test multiple sets of samples simultaneously. In use, the outlet 308 of one condenser tube 301 is connected to the inlet 307 of the adjacent condenser tube 301 through the water guide pipe 311, and so on. The inlet 307 of the condenser tube 301 near the circulating water inlet 309 is connected to the circulating water inlet 309 through the water guide pipe 311, and the outlet 308 of the condenser tube 301 near the circulating water outlet 310 is connected to the circulating water outlet 310 through the water guide pipe 311, thereby completing the condensate circulation between multiple condenser tubes 301. Each nitrogen blowing pipe 501 is connected to the corresponding nitrogen inlet 502 through the gas guide pipe 503.

[0047] Separator 4 has two different states during instrument use:

[0048] like Figure 9 As shown, when distillation has not been performed and nitrogen has not been blown into the distillation flask 2, under the pulling force of the reset member 404, the fixed seat 401 and the movable seat 402 are in a tightly fitted state. At this time, the bottom end of the guide rod 409 abuts against the bottom of the guide groove 410. Under the abutting action of the guide groove 410, the guide rod 409 drives the elastic extrusion member 408 to move upward in the cavity 406, causing the elastic extrusion member 408 to bulge upward and extrude the gas in the cavity 406, thereby causing the expansion part 405 to expand outward and fit tightly against the inner wall of the sleeve 302. At this time, the expansion part 405 and the inner wall of the sleeve 302 are in a closed state.

[0049] like Figure 10As shown, during the distillation process, while nitrogen is being blown into the distillation flask 2, the distilled gas below the fixed seat 401 first undergoes condensation in the lower condensing section. A portion of the distilled gas condenses into a liquid state and flows back into the distillation flask 2 along the inner wall of the sleeve 302. The remaining fully condensed distilled gas follows the nitrogen and moves upward through the gas passage 403, overcoming the pulling force of the reset member 404, and pushes the movable seat 402 upward, separating it from the fixed seat 401. At this time, the guide groove 410 no longer pushes against the guide rod 409, the elastic extrusion member 408 automatically returns to the horizontal state, the gas pressure in the expansion part 405 decreases and contracts, causing the expansion part 405 to disengage from the inner wall of the sleeve 302, and an annular gap is formed between the inner wall of the sleeve 302 and the movable seat 402. The uncondensed distilled gas follows the nitrogen into the upper condensing section for secondary condensation.

[0050] The condensing chamber 304 is divided into an upper condensing section and a lower condensing section by the partition 4. The upper condensing section and the lower condensing section perform primary condensation and secondary condensation on the distilled gas, respectively. Since the temperature of the distilled gas has been reduced to a certain extent after primary condensation, this setting can effectively prevent heat from spreading to the entire condensing chamber 304, maintain a certain temperature difference between the upper condensing section and the lower condensing section, thereby improving the condensation effect on the distilled gas. Furthermore, the distilled gas can be further reduced by undergoing two condensations in the upper and lower condensing sections, preventing the volatile hydrochloric acid from entering the absorption bottle 6 along with nitrogen and sulfur dioxide. The partition 4 can also impede the upward movement of the distilled gas, prolonging the residence time of the distilled gas in the condensing chamber 304, thereby improving the condensation effect on the distilled gas.

[0051] When the expansion section 405 expands outward, it can fit tightly against the inner wall of the sleeve 302, thus disconnecting the passage between the upper and lower condensing sections. The two sections are in an independent state, which can effectively prevent external impurities from entering the distillation flask 2 downward through the condensing chamber 304, ensuring the cleanliness of the testing instrument.

[0052] When the expansion section 405 contracts, it disengages from the inner wall of the sleeve 302, forming an annular gap between the inner wall of the sleeve 302 and the movable seat 402. The distilled gas, after primary condensation, enters the upper condensation section through the annular gap. During this process, the distilled gas, constrained by the annular gap, moves upward along the inner wall of the sleeve 302 in a thin annular airflow pattern, thereby improving the condensation efficiency between the distilled gas and the upper condensation section and enhancing the secondary condensation effect on the distilled gas.

[0053] By setting the fixing seat 401 as a "convex" structure, the fixing seat 401 and the inner wall of the sleeve 302 cooperate to form a space to contain liquid. The liquid formed after secondary condensation is stored in the above space, thereby preventing the condensate containing hydrochloric acid from flowing back into the distillation flask 2 for repeated distillation and evaporation. At the same time, it can prevent the temperature change inside the distillation flask 2 caused by the condensate flowing back into the distillation flask 2, ensuring the efficient and stable operation of the distillation process.

[0054] By setting an adjustable partition 4 inside the sleeve 302, when multiple samples are tested simultaneously, the required distillation temperature and condensation conditions of different samples are different. The staff can adjust the position of the partition 4 in advance according to the condensation conditions of each sample, thereby setting the distribution of the upper and lower condensation sections and meeting the different needs when testing different samples.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An instrument for detecting sulfur dioxide residues in traditional Chinese medicine, comprising a main unit (1), characterized in that, Also includes: A distillation flask (2), which is located on top of the main unit (1), is used to hold the sample to be tested; A condenser assembly (3) is disposed on the top of the distillation flask (2), including a condenser tube (301) and a sleeve (302). The sleeve (302) is fixedly disposed inside the condenser tube (301) and divides the condenser tube (301) into a water passage chamber (303) and a condensation chamber (304). The partition (4) is disposed inside the condensing cavity (304) and divides the condensing cavity (304) into an upper condensing section and a lower condensing section. The partition (4) includes a fixed seat (401) and a movable seat (402). The fixed seat (401) and the movable seat (402) are fitted together and separated from each other, and the on / off state between the upper condensing section and the lower condensing section can be adjusted. The partition (4) further includes: An air passage (403) extends through the interior of the fixed base (401); The fixed seat (401) and the movable seat (402) are both disposed inside the sleeve (302), and the movable seat (402) is located above the fixed seat (401); A reset member (404) is fixedly disposed between the fixed seat (401) and the movable seat (402). The reset member (404) is used to provide a pulling force that brings the fixed seat (401) and the movable seat (402) closer to each other. An expansion portion (405) is fixedly disposed on the outer periphery of the movable seat (402); A cavity (406) is formed inside the movable seat (402), and the expansion part (405) and the cavity (406) are connected by a through groove (407); An elastic compression member (408) is fixedly disposed at the bottom of the cavity (406); A guide rod (409) is fixedly disposed at the bottom of the elastic extrusion member (408) and extends through to the bottom of the movable seat (402); A guide groove (410) is provided on the top of the fixed seat (401), and the bottom of the guide rod (409) is slidably disposed in the guide groove (410); A flow guide (411) is provided on the side of the movable seat (402) and corresponds to the position of the air passage (403). The flow guide (411) is used to guide the gas ejected from the air passage (403). A sealing ring (412) is fixedly sleeved on the outside of the fixing seat (401) and maintains a sliding seal with the inner wall of the sleeve (302); A receiving groove (413) is provided on the top of the fixed base (401), and the bottom end of the reset member (404) is fixedly provided on the bottom of the receiving groove (413). The receiving groove (413) is used to store the reset member (404). The hanging ring (414) is fixedly installed at the bottom of the fixing base (401); A nitrogen blowing assembly (5) is disposed on the side of the distillation flask (2) for filling the distillation flask (2) with nitrogen; An absorption bottle (6) is disposed on top of the main unit (1) for absorbing sulfur dioxide gas.

2. The instrument for detecting sulfur dioxide residues in traditional Chinese medicine according to claim 1, characterized in that, The condensation assembly (3) further includes: An air inlet (305) and an air outlet (306) are provided. The air inlet (305) is located at the bottom of the condenser tube (301) and is connected to the top of the distillation flask (2). The air outlet (306) is located at the top of the condenser tube (301). Both the air inlet (305) and the air outlet (306) are connected to the condensation chamber (304). The inlet (307) and outlet (308) are provided. The inlet (307) is located at the bottom side of the condenser tube (301), and the outlet (308) is located at the top side of the condenser tube (301). Both the inlet (307) and outlet (308) are connected to the water passage cavity (303).

3. The instrument for detecting sulfur dioxide residues in traditional Chinese medicine according to claim 2, characterized in that, The condensation assembly (3) further includes: A circulating water inlet (309) is located on one side of the top of the main unit (1); A circulating water outlet (310) is located on the other side of the top of the main unit (1); The circulating water outlet (310) and the outlet (308), and the circulating water inlet (309) and the inlet (307) are all connected by a water guide pipe (311); The collecting tube (312) is connected at one end to the gas outlet (306) and at the other end to the inside of the absorption bottle (6).

4. The instrument for detecting sulfur dioxide residues in traditional Chinese medicine according to claim 1, characterized in that, The nitrogen blowing assembly (5) includes: A nitrogen blowing tube (501) is connected to the side of the distillation flask (2); Nitrogen inlet (502) is located on the top of the main unit (1); The nitrogen blowing pipe (501) and the nitrogen inlet (502) are connected by a gas guide pipe (503).

5. An instrument for detecting sulfur dioxide residues in traditional Chinese medicine according to claim 4, characterized in that, Also includes: A heating element (7) is disposed on the top of the main unit (1), and the distillation flask (2) is placed inside the heating element (7); The separating funnel (8) is fixedly installed at the top of the nitrogen blowing tube (501), and the bottom of the separating funnel (8) passes through the nitrogen blowing tube (501) and extends into the interior of the distillation flask (2).

6. The instrument for detecting sulfur dioxide residues in traditional Chinese medicine according to claim 1, characterized in that, The top of the host (1) is provided with a mounting bracket (9), and a clamping hoop (10) is fixedly provided on the mounting bracket (9).

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