Automatic extraction device for pesticide sample pretreatment

Abstract

The utility model belongs to pesticide residue extraction technical field, concretely is a kind of automatic extraction device of pesticide sample pretreatment, a kind of automatic extraction device of pesticide sample pretreatment, including extraction column, color phase sensor, liquid level sensor, further include: feed pipe, first valve and guide pipe, there is waste liquid tank in guide pipe bottom, there is filter plate, support plate and sealing strip in waste liquid tank inside;Circulation component is set at one side of extraction column;Quick-release assembly is set at the lateral wall outside waste liquid tank;Raw material processing component is set at the top wall of first valve, and raw material processing component includes crushing barrel, discharge port and crushing component;Waste material processing component includes fixed plate, waste material collection component, reflux component and filter-pressing component;The utility model provides a kind of automatic extraction device of pesticide sample pretreatment, and the sediment is separated by waste material processing component filter-pressing precipitate;Collect precipitate, finally the solution after filtration is refluxed, improve the precision of extraction.

Description

Technical Field

[0001] This utility model relates to the field of pesticide residue extraction technology, and in particular to an automatic extraction device for pesticide sample pretreatment. Background Technology

[0002] The background technology for pesticide residue extraction stems from the widespread use of pesticides in modern agriculture. While ensuring crop yields, pesticide residue issues have raised concerns about food safety. With increasing public health awareness and the establishment of pesticide residue limits in various countries, the demand for pesticide residue testing in agricultural products is becoming increasingly urgent. The development of high-precision detection technologies such as gas chromatography and mass spectrometry necessitates the effective separation of pesticides from complex matrices in samples. This has driven the gradual development of pesticide residue extraction technology, making it a crucial step in the pretreatment process for pesticide residue detection.

[0003] A search revealed an existing patent (publication number: CN219941832U) disclosing a pesticide residue extraction device, belonging to the field of pesticide residue extraction technology. This patent addresses the problem that conventional extraction tanks, which mix samples and extraction agents, directly discharge the separated liquid, resulting in sediment in the discharged liquid. This sediment easily affects the device's collection efficiency after pesticide residue extraction. The original device included an extraction tank with a top plate fixed to its top. This new invention utilizes the mutual installation and cooperation of a concave column and a filter plate, allowing the outer wall of the filter plate to engage with the inner wall of the concave column. This facilitates the filtration of the separated liquid after extraction, preventing sediment from being discharged with the liquid. The mutual installation and cooperation of a fixing plate and a connecting block allows the outer wall of the connecting block to slide away from the inner wall of the connecting hole, facilitating the replacement of the filter plate engaged with the inner wall of the concave column and preventing the filter plate from degrading its surface filtration performance due to repeated use.

[0004] However, in actual use of the above solution, no specific treatment was given to the filtered precipitate, which caused the liquid attached to the precipitate to be discharged along with the precipitate, thus adversely affecting the extraction results. On the other hand, the filter plate was not convenient to clean or replace, which affected the overall operating efficiency of the equipment.

[0005] Therefore, this utility model provides a feeding and sorting device for an easy-open can wrapping machine. Utility Model Content

[0006] The purpose of this invention is to solve the problem in the prior art that the precipitate after filtration is not specifically treated, which affects the extraction results, and to propose an automatic extraction device for pesticide sample pretreatment.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An automated extraction device for pesticide sample pretreatment includes an extraction column, a colorimetric sensor fixedly connected to one outer wall of the extraction column, and a liquid level sensor fixedly connected to the other outer wall of the extraction column. The device also includes: A feed pipe is fixedly connected to the top wall of the extraction column, and a first valve is fixedly connected to the top of the feed pipe; A guide tube is fixedly connected to the bottom wall of the extraction column. A sealing plate is slidably connected to the bottom end of the guide tube. A waste liquid tank is bolted to the side wall of the sealing plate. A bottom plate is fixedly connected to the bottom wall of the waste liquid tank. A filter plate is slidably connected to the inner side wall of the waste liquid tank. A support plate is fixedly connected to the inner side wall of the waste liquid tank near the pulverizing tank. The support plate is symmetrically arranged about the filter plate. A sealing strip is slidably connected to the top of the filter plate on the side away from the color sensor. The circulation component is located on the side of the extraction column near the hue sensor; The quick-release assembly is located on the outer wall of the waste liquid tank near the feed pipe; A raw material processing component is disposed on the top wall of the first valve. The raw material processing component includes a crushing barrel fixedly connected to the top wall of the first valve. A discharge port is fixedly connected to the top wall of the crushing barrel. A crushing assembly is disposed in the middle section of the inner side of the crushing barrel. The waste treatment component includes a fixed plate fixedly connected to the bottom plate away from the top wall of the color sensor. The side wall of the fixed plate is provided with a waste collection component, a reflux component provided on the top wall of the bottom plate away from the conveying pipe, and a filter press component provided on the top wall of the filter plate near the conveying pipe.

[0008] As a preferred technical solution of this application, the circulation assembly includes a heating base fixedly connected to the top wall of the base plate, a solvent bottle fixedly connected to the top of the heating base, a first connecting pipe fixedly connected to the top side wall of the solvent bottle, a condenser fixedly connected to the end of the first connecting pipe away from the heating base, a second connecting pipe fixedly connected to the bottom wall of the condenser, the end of the second connecting pipe away from the condenser fixedly connected to the side wall of the extraction column, a first reflux pipe fixedly connected to the side wall of the extraction column away from the condenser, a second valve fixedly connected to the middle section of the first reflux pipe, the end of the first reflux pipe away from the extraction column fixedly connected to the top side wall of the solvent bottle, a siphon fixedly connected to the middle section of the first reflux pipe, the end of the siphon pipe near the liquid level sensor fixedly connected to the extraction column, a reaction cylinder fixedly connected to the inner top wall of the extraction column, a liquid extraction pipe fixedly connected to the side wall of the extraction column away from the pulverizing tank, a first water pump fixedly connected to the middle section of the liquid extraction pipe, and an extraction tank fixedly connected to the top of the liquid extraction pipe.

[0009] As a preferred technical solution of this application, the quick-release assembly includes two fixing blocks fixedly connected to the side wall of the filter plate near the crushing barrel, and three springs fixedly connected to the inner side wall of the waste liquid tank away from the crushing barrel. Two limiting grooves are fixedly connected to the side wall of the fixing blocks, and fixing pins are slidably connected inside the limiting grooves.

[0010] As a preferred technical solution of this application, the crushing assembly includes a first motor fixedly connected to the top wall of the crushing barrel, and a crushing rod is fixedly connected to the output end of the first motor.

[0011] As a preferred technical solution of this application, the waste collection assembly includes a first hydraulic rod fixedly connected to the middle section of the inner side of the fixed plate and a ball valve fixedly connected to the bottom of the reaction cylinder. The output end of the first hydraulic rod passes through one side wall of the waste liquid tank, and a push plate is fixedly connected to the output end of the first hydraulic rod. A waste trough is fixedly connected to the inner bottom wall of the waste liquid tank away from the push plate. A second hydraulic rod is fixedly connected to the middle section of the bottom wall of the waste liquid tank, and a vertical plate is fixedly connected to the output end of the second hydraulic rod.

[0012] As a preferred technical solution of this application, the reflux assembly includes a second reflux pipe fixedly connected to the side wall of the waste liquid tank away from the crushing barrel, a second water pump fixedly connected to the middle section of the second reflux pipe, and the liquid outlet end of the second reflux pipe fixedly connected to the top wall of the extraction column.

[0013] As a preferred technical solution of this application, the filter press assembly includes a hydraulic cylinder fixedly connected to the side wall of the waste liquid tank away from the second water pump. A piston rod is fixedly connected to the output end of the hydraulic cylinder. An extrusion plate is fixedly connected to the end of the piston rod away from the hydraulic cylinder. A limiting plate is fixedly connected to the top wall of the filter plate away from the extrusion plate.

[0014] Compared with the prior art, this utility model provides an automatic extraction device for pesticide sample pretreatment, which has the following beneficial effects: 1. The automatic extraction device for pesticide sample pretreatment described in this utility model treats the precipitate through a waste treatment component, separates the liquid from the extracted mixture by pressure filtration of the precipitate for reuse, collects the filtered precipitate through a waste collection component, and recirculates the filtered solution through a solution reflux component, thereby improving the accuracy of the extraction results.

[0015] 2. The automatic extraction device for pesticide sample pretreatment described in this utility model enables quick disassembly and assembly of the filter screen through a quick-release filter screen assembly, improving the convenience and efficiency of equipment maintenance. The operator only needs to pull the fixing pin that is slidably connected to the upper limit groove of the fixing block to release the locking state of the filter plate and the waste liquid tank. At this time, the spring on the inner side wall of the waste liquid tank will use its elastic potential energy to slightly push the filter plate, making it easier to pull the filter plate out from the support plate. The entire disassembly process does not require complicated tools and can be completed quickly by a single person. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ; Figure 4 This is a schematic cross-sectional view of the extraction column in this utility model; Figure 5 This is a partial structural diagram of the crushing rod in this utility model; Figure 6 This is a partial structural diagram of the waste liquid tank in this utility model; Figure 7 This is a partial structural diagram of the second hydraulic rod in this utility model; Figure 8 This is a partial structural schematic diagram and a partial enlarged view of the filter plate in this utility model.

[0017] In the picture: 1. Base plate; 2. Color sensor; 3. Liquid level sensor; 4. Waste liquid tank; 201. Discharge port; 202. Crushing barrel; 203. First motor; 204. Crushing rod; 205. First valve; 206. Feed pipe; 301. Heating base; 302. Solvent bottle; 303. First connecting pipe; 304. Condenser; 305. Second connecting pipe; 306. Extraction column; 307. Reaction cylinder; 308. Siphon tube; 309. First reflux pipe; 310. Second valve; 311. First water pump; 312. Suction pipe; 31 3. Extraction tank; 401. Guide tube; 402. Ball valve; 403. Sealing plate; 404. Filter plate; 405. Extrusion plate; 406. Hydraulic cylinder; 407. Piston rod; 408. Limiting plate; 409. Support plate; 410. Sealing strip; 411. Second water pump; 412. Second return pipe; 501. Fixing plate; 502. First hydraulic rod; 503. Push plate; 504. Vertical plate; 505. Second hydraulic rod; 506. Waste trough; 601. Fixing block; 602. Fixing pin; 603. Limiting groove; 604. Spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] Example: Reference Figure 1-8 An automated extraction device for pesticide sample pretreatment includes an extraction column 306, a color sensor 2 fixedly connected to one side of the outer wall of the extraction column 306, and a liquid level sensor 3 fixedly connected to the other side of the outer wall of the extraction column 306. It also includes: The feed pipe 206 is fixedly connected to the top wall of the extraction column 306, and the top end of the feed pipe 206 is fixedly connected to the first valve 205; A guide tube 401 is fixedly connected to the bottom wall of the extraction column 306. A sealing plate 403 is slidably connected to the bottom end of the guide tube 401. A waste liquid tank 4 is bolted to the side wall of the sealing plate 403. A bottom plate 1 is fixedly connected to the bottom wall of the waste liquid tank 4. A filter plate 404 is slidably connected to the inner side wall of the waste liquid tank 4. A support plate 409 is fixedly connected to the inner side wall of the waste liquid tank 4 near the pulverizing tank 202. The support plate 409 is symmetrically arranged about the filter plate 404. A sealing strip 410 is slidably connected to the top of the side of the filter plate 404 away from the color sensor 2. A circulation component is located on the side of the extraction column 306 near the hue sensor 2; The quick-release assembly is located on the outer wall of the waste liquid tank 4 near the feed pipe 206; A raw material processing component is provided on the top wall of the first valve 205. The raw material processing component includes a crushing barrel 202 fixedly connected to the top wall of the first valve 205. A discharge port 201 is fixedly connected to the top wall of the crushing barrel 202. A crushing component is provided in the middle section of the inner side of the crushing barrel 202. The waste treatment component includes a fixing plate 501 fixedly connected to the top wall of the base plate 1 away from the color sensor 2. The side wall of the fixing plate 501 is provided with a waste collection component, a reflux component provided on the top wall of the base plate 1 away from the conveying pipe 206, and a filter press component provided on the top wall of the filter plate 404 near the conveying pipe 206.

[0020] The circulation assembly includes a heating base 301 fixedly connected to the top wall of the base plate 1. A solvent bottle 302 is fixedly connected to the top of the heating base 301. A first connecting pipe 303 is fixedly connected to the top side wall of the solvent bottle 302. A condenser 304 is fixedly connected to the end of the first connecting pipe 303 away from the heating base 301. A second connecting pipe 305 is fixedly connected to the bottom wall of the condenser 304. The end of the second connecting pipe 305 away from the condenser 304 is fixedly connected to the side wall of the extraction column 306. A first reflux pipe 309 is fixedly connected to the side wall of the extraction column 306 away from the condenser 304. A second valve 310 is fixedly connected to the middle section of the first reflux pipe 309. The end of the first reflux pipe 309 away from the extraction column 306 is fixedly connected to the top side wall of the solvent bottle 302. A siphon pipe 308 is fixedly connected to the middle section of the first reflux pipe 309. The end of the siphon pipe 308 near the liquid level sensor 3 is fixedly connected to the extraction column 306. A reaction cylinder 307 is fixedly connected to the inner top wall of the extraction column 306. A liquid extraction pipe 312 is fixedly connected to the side wall of the extraction column 306 away from the pulverizing tank 202. A first water pump 311 is fixedly connected to the middle section of the liquid extraction pipe 312. An extraction tank 313 is fixedly connected to the top of the liquid extraction pipe 312.

[0021] The quick-release assembly includes two fixing blocks 601 fixedly connected to the side wall of the filter plate 404 near the crushing barrel 202, and three springs 604 fixedly connected to the inner side wall of the waste liquid tank 4 away from the crushing barrel 202. Two limiting grooves 603 are fixedly connected to the side wall of the fixing block 601, and a fixing pin 602 is slidably connected inside the limiting groove 603.

[0022] The crushing assembly includes a first motor 203 fixedly connected to the top wall of the crushing barrel 202, and a crushing rod 204 fixedly connected to the output end of the first motor 203.

[0023] The waste collection assembly includes a first hydraulic rod 502 fixedly connected to the middle section of the inner side of the fixed plate 501, and a ball valve 402 fixedly connected to the bottom of the reaction cylinder 307. The output end of the first hydraulic rod 502 passes through one side wall of the waste liquid tank 4, and a push plate 503 is fixedly connected to the output end of the first hydraulic rod 502. A waste trough 506 is fixedly connected to the inner bottom wall of the waste liquid tank 4 away from the push plate 503. A second hydraulic rod 505 is fixedly connected to the middle section of the bottom wall of the waste liquid tank 4, and a vertical plate 504 is fixedly connected to the output end of the second hydraulic rod 505.

[0024] The reflux assembly includes a second reflux pipe 412 fixedly connected to the side wall of the waste liquid tank 4 away from the crushing barrel 202. The middle section of the second reflux pipe 412 is fixedly connected to a second water pump 411. The liquid outlet end of the second reflux pipe 412 is fixedly connected to the top wall of the extraction column 306.

[0025] The filter press assembly includes a hydraulic cylinder 406 fixedly connected to the side wall of the waste liquid tank 4 away from the second water pump 411. A piston rod 407 is fixedly connected to the output end of the hydraulic cylinder 406. A squeezing plate 405 is fixedly connected to the end of the piston rod 407 away from the hydraulic cylinder 406. A limiting plate 408 is fixedly connected to the top wall of the filter plate 404 away from the squeezing plate 405.

[0026] Specifically, when using this automatic extraction device for pesticide sample pretreatment: firstly, the sample is processed through the feeding component. The sample to be extracted is put into the discharge port 201. The first motor 203 drives the crushing rod 204 to rotate, crushing the sample into small pieces. After crushing, the sample enters the reaction cylinder 307 through the conveying pipe 206 and the first valve 205. Then the extraction assembly starts working. The heating base 301 heats the solvent through the solvent bottle 302. The solvent temperature rises and evaporates into gas. The vapor enters the condenser 304 through the first connecting pipe 303 and condenses into liquid. It enters the extraction column 306 through the second connecting pipe 305 to react with the sample. During the reaction, the color sensor 2 and the liquid level sensor 3 monitor the reaction. When the liquid level sensor 3 detects that the liquid level in the extraction column 306 rises to the highest point of the siphon tube 308, the siphon effect is triggered and the second valve 310 is opened. The solvent in the extraction column 306 containing the target component flows back to the solvent bottle 302 below through the siphon tube 308 and the first reflux tube 309. After the reaction is completed, the first water pump 311 pumps the extract to the extraction tank 313 through the liquid extraction tube 312. Then, the ball valve 402 opens, and the extracted mixture enters the filter plate 404 of the waste liquid tank 4 through the ball valve 402. The mixture undergoes natural filtration on the filter plate 404 due to gravity. Subsequently, the hydraulic cylinder 406 drives the piston rod 407 to drive the extrusion plate 405 to push the mixture towards the limiting plate 408. When the extrusion plate 405 moves to the designated position, it completes the pressure filtration of the extracted mixture with the limiting plate 408. The filtered solution flows into the bottom of the waste liquid tank 4 through the holes of the filter plate 404. The filtered solution is pumped back to the extraction column 306 by the second water pump 411 through the second return pipe 412 for recycling. After filtration is completed, the second hydraulic rod 505 first drives the vertical plate 504 to descend to be flush with the filter plate 404, and then the first hydraulic rod 502 pushes the push plate 503 to move towards the waste trough 506, pushing the filtered solids on the surface of the filter plate 404 into the waste trough 506. When the filter plate 404 needs to be cleaned, move one end of the fixing pin 602 out of the limiting groove 603 to remove the limiting of the filter plate 404. At this time, since the limiting of the filter plate 404 is removed, the spring 604 will pop the filter plate 404 out, thus completing the disassembly of the filter plate 404.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automated extraction device for pesticide sample pretreatment, comprising an extraction column (306), characterized in that, A color sensor (2) is fixedly connected to one side of the outer wall of the extraction column (306), and a liquid level sensor (3) is fixedly connected to the other side of the outer wall of the extraction column (306). The column also includes: The feed pipe (206) is fixedly connected to the top wall of the extraction column (306), and a first valve (205) is fixedly connected to the top of the feed pipe (206). A guide tube (401) is fixedly connected to the bottom wall of the extraction column (306). A sealing plate (403) is slidably connected to the bottom end of the guide tube (401). A waste liquid tank (4) is bolted to the side wall of the sealing plate (403). A bottom plate (1) is fixedly connected to the bottom wall of the waste liquid tank (4). A filter plate (404) is slidably connected to the inner side wall of the waste liquid tank (4). A support plate (409) is fixedly connected to the inner side wall of the waste liquid tank (4) near the crushing barrel (202). The support plate (409) is symmetrically arranged about the filter plate (404). A sealing strip (410) is slidably connected to the top of the filter plate (404) on the side away from the color sensor (2). A circulation assembly is disposed on the side of the extraction column (306) near the hue sensor (2); The quick-release assembly is located on the outer wall of the waste liquid tank (4) near the feed pipe (206); A raw material processing component is provided on the top wall of the first valve (205). The raw material processing component includes a crushing barrel (202) fixedly connected to the top wall of the first valve (205) and a discharge port (201) fixedly connected to the top wall of the crushing barrel (202). A crushing component is provided in the middle section of the inner side of the crushing barrel (202). The waste treatment component includes a fixed plate (501) fixedly connected to the top wall of the base plate (1) away from the color sensor (2). The side wall of the fixed plate (501) is provided with a waste collection component, a reflux component provided on the top wall of the base plate (1) away from the conveying pipe (206), and a filter press component provided on the top wall of the filter plate (404) near the conveying pipe (206).

2. The automatic extraction device for pesticide sample pretreatment according to claim 1, characterized in that, The circulation assembly includes a heating base (301) fixedly connected to the top wall of the base plate (1). A solvent bottle (302) is fixedly connected to the top of the heating base (301). A first connecting pipe (303) is fixedly connected to the top side wall of the solvent bottle (302). A condenser (304) is fixedly connected to the end of the first connecting pipe (303) away from the heating base (301). A second connecting pipe (305) is fixedly connected to the bottom wall of the condenser (304). The end of the second connecting pipe (305) away from the condenser (304) is fixedly connected to the side wall of the extraction column (306). A first reflux pipe (309) is fixedly connected to the side wall of the extraction column (306) away from the condenser (304). 9) A second valve (310) is fixedly connected in the middle section. The end of the first reflux pipe (309) away from the extraction column (306) is fixedly connected to the top side wall of the solvent bottle (302). A siphon pipe (308) is fixedly connected in the middle section of the first reflux pipe (309). The end of the siphon pipe (308) near the liquid level sensor (3) is fixedly connected to the extraction column (306). A reaction cylinder (307) is fixedly connected to the inner top wall of the extraction column (306). A liquid extraction pipe (312) is fixedly connected to the side wall of the extraction column (306) away from the pulverizing tank (202). A first water pump (311) is fixedly connected in the middle section of the liquid extraction pipe (312). An extraction tank (313) is fixedly connected to the top of the liquid extraction pipe (312).

3. The automatic extraction device for pesticide sample pretreatment according to claim 2, characterized in that, The quick-release assembly includes two fixing blocks (601) fixedly connected to the side wall of the filter plate (404) near the crushing barrel (202), and three springs (604) fixedly connected to the side wall of the filter plate (404) near the crushing barrel (202). Two limiting grooves (603) are fixedly connected to the side wall of the fixing block (601), and a fixing pin (602) is slidably connected inside the limiting groove (603).

4. The automatic extraction device for pesticide sample pretreatment according to claim 3, characterized in that, The crushing assembly includes a first motor (203) fixedly connected to the top wall of the crushing barrel (202), and a crushing rod (204) is fixedly connected to the output end of the first motor (203).

5. The automatic extraction device for pesticide sample pretreatment according to claim 4, characterized in that, The waste collection assembly includes a first hydraulic rod (502) fixedly connected to the middle section of the inner side of the fixed plate (501) and a ball valve (402) fixedly connected to the bottom of the reaction cylinder (307). The output end of the first hydraulic rod (502) penetrates one side wall of the waste liquid tank (4), and a push plate (503) is fixedly connected to the output end of the first hydraulic rod (502). A waste trough (506) is fixedly connected to the inner bottom wall of the waste liquid tank (4) away from the push plate (503). A second hydraulic rod (505) is fixedly connected to the middle section of the bottom wall of the waste liquid tank (4), and a vertical plate (504) is fixedly connected to the output end of the second hydraulic rod (505).

6. The automatic extraction device for pesticide sample pretreatment according to claim 5, characterized in that, The reflux assembly includes a second reflux pipe (412) fixedly connected to the side wall of the waste liquid tank (4) away from the crushing barrel (202). The middle section of the second reflux pipe (412) is fixedly connected to a second water pump (411). The outlet end of the second reflux pipe (412) is fixedly connected to the top wall of the extraction column (306).

7. The automatic extraction device for pesticide sample pretreatment according to claim 1, characterized in that, The filter press assembly includes a hydraulic cylinder (406) fixedly connected to the side wall of the waste liquid tank (4) away from the second water pump (411). A piston rod (407) is fixedly connected to the output end of the hydraulic cylinder (406). A pressing plate (405) is fixedly connected to the end of the piston rod (407) away from the hydraulic cylinder (406). A limiting plate (408) is fixedly connected to the top wall of the filter plate (404) away from the pressing plate (405).

Images