CN113432958B - A extraction element for pretreatment in pesticide residue detects - Google Patents
A extraction element for pretreatment in pesticide residue detects Download PDFInfo
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- CN113432958B CN113432958B CN202110585988.2A CN202110585988A CN113432958B CN 113432958 B CN113432958 B CN 113432958B CN 202110585988 A CN202110585988 A CN 202110585988A CN 113432958 B CN113432958 B CN 113432958B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The invention relates to an extraction device for pretreatment in pesticide residue detection, which comprises a device bedplate with a rectangular shape, a grabbing and transferring mechanism arranged at the gravity center position of the device bedplate, a sample input end and a weighing mechanism arranged at one side edge of the device bedplate, a homogenizing mechanism arranged at the other side edge of the device bedplate, a filtering and vibrating mechanism arranged opposite to the sample input end of the device bedplate, and a program control box arranged in the device bedplate. According to the extraction device for pretreatment in pesticide residue detection, multiple processes in extraction operation are combined together in a pipeline mode, particularly the vibration mechanism is filtered, the two processes which are most time-consuming and labor-consuming are combined together and completed in the same mechanism, secondary transfer is omitted, multiple groups of processes can be performed simultaneously, the time efficiency of filtering is improved, and the hands of experimenters are completely released.
Description
Technical Field
The invention belongs to the technical field of food and agricultural product detection, and particularly relates to an extraction device for pretreatment in pesticide residue detection.
Background
In the determination of the organochlorine and pyrethroid pesticide residue in vegetables and fruits, the extraction part has multiple working steps, much time consumption and large workload, the traditional extraction process needs experimenters to operate, particularly, the filtration after homogenization is very time-consuming, and taking a sample with moderate sugar content as an example, the filtration is carried out by filtering 50g, and the traditional natural gravity filtration needs about 40 minutes.
The notice number is: CN111855344A name: a pretreatment device for pesticide residue detection is provided, wherein negative pressure suction is mentioned, tests show that although the method can accelerate the filtration time, after a period of filtration, the filter paper absorbs more water, and the suction of the negative pressure still directly acts on the filter paper, so that the filter paper is easy to break, and the sample is damaged.
On the other hand, after the filtration is finished, a laboratory technician is required to press the plug cover by hand and tightly hold the plug measuring cylinder to continuously vibrate up and down for one minute, so that the physical influence on the laboratory technician is great and the efficiency is low during batch detection.
Disclosure of Invention
Aiming at the problems, the invention provides the extraction device which adopts the assembly line extraction operation, can accelerate the filtration time, simulates the manual oscillation mode to carry out batch oscillation and is used for pretreatment in pesticide residue detection.
The purpose of the invention is realized by the following technical scheme: an extraction device for pretreatment in pesticide residue detection comprises a device bedplate with a rectangular shape, a grabbing and transferring mechanism arranged at the gravity center position of the device bedplate, a sample input end and a weighing mechanism arranged at one side edge of the device bedplate, a homogenizing mechanism arranged at the other side edge of the device bedplate, a filtering and vibrating mechanism arranged at the device bedplate and opposite to the sample input end, a sample output end arranged at the device bedplate and opposite to the homogenizing mechanism, and a program control box arranged in the device bedplate;
a circular chain plate conveying assembly taking the gravity center of the device as an axis is arranged on the device bedplate;
through program control case control, snatch transfer mechanism and can take the sample container who is equipped with the sample to weighing mechanism from sample input ration extraction, sample container again from weighing mechanism through link joint conveying component flow to homogenate mechanism, homogenate mechanism adds quantitative acetonitrile to the sample, homogenizes afterwards, and sample container continues the circulation after accomplishing the homogenate, pours into the utensil stopper graduated flask of placing the funnel in filtering and shaking the mechanism into through snatching transfer mechanism, filtering and shaking the mechanism and have the function that high frequency low amplitude vibrations and upper and lower high amplitude vibrate, and the sample accomplishes the filtration in filtering and shaking the mechanism and vibrate the back, through snatching transfer mechanism and transfer to the sample output, and the sample accomplishes acetonitrile looks and aqueous phase layering after standing still in utensil stopper graduated flask.
The filtering and oscillating mechanism further comprises a measuring cylinder accommodating device, an oscillating assembly connected below the measuring cylinder accommodating device, a sliding bearing seat connected to the measuring cylinder accommodating device and close to one side of the center of gravity of the device bedplate, an oscillating driving assembly connected to the measuring cylinder accommodating device and far away from one side of the center of gravity of the device bedplate, an input end of the measuring cylinder with the plug positioned on one side of the measuring cylinder accommodating device and an input end of the plug cover positioned on the other side of the measuring cylinder accommodating device.
A section of flexible sheath is arranged at the middle lower part of the straight section of the funnel, and a section of flexible encapsulation is arranged at the part where the straight section is connected with the conical section.
The homogenizing mechanism comprises a mechanism base body, an acetonitrile adding assembly, a homogenizing assembly, a cleaning bin, a sliding pressing assembly and a right-angle movable backer, wherein the acetonitrile adding assembly is installed on one side of the mechanism base body;
mechanism's pedestal barycenter position sets up the stand, and the stand tip sets up the crossbeam, and acetonitrile interpolation subassembly and homogenate subassembly set up respectively in one of them one end of crossbeam, and the stand can be followed self axis and gone up and down and rotate.
The plug measuring cylinder accommodating device comprises a crankshaft, a shell for accommodating and mounting the crankshaft, a plurality of connecting rods arranged on the crankshaft, a plug measuring cylinder accommodating cavity arranged at the end part of each connecting rod, and a pneumatic clamping block arranged at the upper part of the shell;
the shell consists of an upper circular ring, a lower circular ring and end covers at two sides, wherein the upper circular ring is provided with a plurality of pore channels for accommodating the up-and-down movement of the connecting rod;
the pneumatic clamping block comprises a clamping block seat body at the lower part and a clamping block at the upper part, wherein the clamping block seat body is provided with a through hole corresponding to a circular hole at the upper part of the shell, the through hole has outward inclination in the radial direction of the shell, and the inclination is used for providing certain degree of freedom in the front-back direction when the accommodating cavity of the measuring cylinder is moved up and down.
The vibration driving assembly comprises a main shaft driving assembly, a plurality of sliding blocks arranged at the bottom of the main shaft driving assembly, two rails matched with the sliding blocks, a moving driving assembly used for moving the main shaft driving assembly along the rails, and an installation frame body used for supporting the rails and installing the moving driving assembly.
The sliding compression assembly comprises a sliding seat body part, a pneumatic disc seat arranged at the upper part of the sliding seat body part, and a rotating disc arranged in the pneumatic disc seat;
the sliding seat part is provided with a sliding rail groove, the pneumatic disc seat is matched with the sliding rail groove, the rotating disc can be driven to slide, and meanwhile, the rotating disc can rotate around the axis of the rotating disc. An infrared sensor is arranged in the right-angle movable backer, and a plurality of rollers which are vertically arranged are arranged on two vertical arms of the right-angle movable backer.
The bottom of the containing cavity of the measuring cylinder with the plug is provided with a compression spring, the end part of the containing cavity is provided with an anti-loosening buckle thread, and the upper part of the compression spring is provided with a gasket.
The vibration assembly includes: a vibration assembly frame body; the vibration assembly frame body is fixedly connected with the installation frame body.
Preferably, the extraction device for pretreatment in pesticide residue detection sets up the weighing mechanism, the homogenizing mechanism and the filtering and vibrating mechanism on the same assembly line, especially the filtering and vibrating mechanism by adopting an assembly line mode, combines two processes together and completes the two processes in the same mechanism, so that secondary transfer is omitted, multiple groups of processes can be carried out simultaneously, high-frequency low-amplitude vibration and large-amplitude up-and-down swinging during vibration are added during filtering, the time efficiency of filtering is improved, and both hands of an experimenter are completely released.
Preferably, the extraction element for pretreatment among pesticide residue detection, its filtration vibrate the high frequency low amplitude vibrations in the mechanism and vibrate from top to bottom by a wide margin, set up vibrations subassembly and vibration drive assembly respectively and come to correspond the vibrations of carrying out utensil stopper graduated flask accommodate device and vibrate with rocking, when vibrations subassembly during operation, vibrate the drive assembly and break away from utensil stopper graduated flask accommodate device, make its vibrations filter the degree of freedom not influenced, when rocking and vibrate, vibrations subassembly stop work, avoid the mutual interference influence.
Preferably, the funnel of the extraction device for pretreatment in pesticide residue detection is provided with a section of flexible sheath at the straight section, and a section of flexible encapsulation is arranged at the joint part of the straight section and the conical section, so that when the extraction device is placed in a measuring cylinder with a plug for filtering and vibrating, the extraction device can not cause direct collision at the contact position.
Preferably, an extraction element for pretreatment in pesticide residue detects, its homogenate mechanism adds the subassembly with the acetonitrile and homogenizes the subassembly setting in same mechanism, the convenient to use switches, and prepares the washing storehouse to stirring tool bit in the homogenate subassembly to ensure that stirring at every turn is accomplished and is in time washd, does not cause the influence to the stirring next time, in addition, the slip that sets up compresses tightly the subassembly cooperation right angle activity backer, can be general to the container of different diameters.
Preferably, the extraction device for pretreatment in pesticide residue detection comprises a plug measuring cylinder accommodating device, the core of the plug measuring cylinder accommodating device is a motion mode of a crankshaft connecting rod mechanism of an engine, the motion mode is stable, the amplitude is large, the effect is good, the size is small, a pneumatic clamping block is arranged on the upper portion of a shell, the plug measuring cylinder accommodating cavity is clamped by the pneumatic clamping block when filtering and vibrating is carried out, resonance with the device is achieved, the pneumatic clamping block is loosened when swinging and vibrating is carried out, and the plug measuring cylinder accommodating cavity can swing up and down along with the motion of a crankshaft connecting rod.
Preferably, the extraction device for pretreatment in pesticide residue detection has the oscillation driving assembly provided with the moving driving assembly, the sliding block and the track, so that the oscillation driving assembly can be connected with and separated from the measuring cylinder accommodating device with the plug at any time according to requirements.
Preferably, the extraction device for pretreatment in pesticide residue detection is characterized in that the sliding pressing assembly is provided with a rotating disc, and after the sample container is pressed, the rotating disc rotates at a slow speed to drive the sample container to rotate, so that the requirement that the container needs to rotate when acetonitrile is added is met.
Preferably, the extraction device for pretreatment in pesticide residue detection is provided with an infrared sensor in a right-angle movable backer, and the infrared sensor is used for detecting the entrance and exit of a sample container and sending a signal to a program control box.
Preferably, the extraction device for pretreatment in pesticide residue detection has the structure that the compression spring is arranged at the bottom of the accommodating cavity of the measuring cylinder with the plug, the anti-loosening screw is arranged at the end part of the accommodating cavity of the measuring cylinder with the plug, the plug cover is locked with the anti-loosening screw after the measuring cylinder with the plug is placed in the accommodating cavity, and the upward acting force of the compression spring at the bottom ensures that the measuring cylinder with the plug and the plug cover are completely sealed and do not leak when vibrating.
In summary, compared with the prior art, the invention has the following advantages:
according to the extraction device for pretreatment in pesticide residue detection, multiple processes in extraction operation are combined together in a pipeline mode, particularly the vibration mechanism is filtered, the two processes which are most time-consuming and labor-consuming are combined together and completed in the same mechanism, secondary transfer is omitted, multiple groups of processes can be performed simultaneously, the time efficiency of filtering is improved, and the hands of experimenters are completely released.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the present invention, and notes: the housing is hidden from view;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
FIG. 5 is a front view of the present invention;
FIG. 6 is a full sectional view taken at A-A of FIG. 5;
fig. 7 is a partially enlarged view at C in fig. 6.
The labels in the figure are:
1. an apparatus platen; 11. a chain plate conveying assembly; 2. a grabbing and transferring mechanism; 3. a sample input end; 4. a weighing mechanism; 5. a homogenizing mechanism; 51. a mechanism base; 52. an acetonitrile addition component; 53. a homogenizing assembly; 54. cleaning the bin; 55. sliding the compression assembly; 551. a sliding seat member; 552. a pneumatic disc seat; 553. rotating the disc; 56. a right-angle movable backer; 6. a filtering and vibrating mechanism; 61. a funnel; 611. a flexible sheath; 612. flexible encapsulation; 62. a measuring cylinder with a plug; 63. a measuring cylinder accommodating device with a plug; 631. a crankshaft; 632. a housing; 633. a connecting rod; 634. a measuring cylinder accommodating cavity is plugged; 635. a pneumatic clamping block; 64. a vibration assembly; 65. a sliding bearing seat; 66. A vibration driving component; 661. a spindle drive assembly; 662. a movement drive assembly; 663. installing a frame body; 664. start and scram switches; 67. the input end of the measuring cylinder is plugged; 68. a plug cover input end; 7. a sample output end; 8. a program control box; 9. a limiting mechanism.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which:
example 1:
as shown in fig. 1 to 7, an extraction device for pretreatment in pesticide residue detection comprises a rectangular device platen 1, a grabbing and transferring mechanism 2 installed at the gravity center position of the device platen 1, a sample input end 3 and a weighing mechanism 4 installed at one side of the device platen 1, a homogenizing mechanism 5 installed at the other side of the device platen 1, a filtering and vibrating mechanism 6 installed at the device platen 1 and the sample input end 3, a sample output end 7 installed at the device platen 1 and the homogenizing mechanism 5, and a program control box 8 installed in the device platen 1;
a circular chain plate conveying assembly 11 taking the gravity center as an axis is arranged on the device bedplate 1;
through 8 control of program control case, snatch transfer mechanism 2 and can take the sample container of being equipped with the sample from 3 ration extractions of sample input to weighing mechanism 4, the sample container again from weighing mechanism 4 through 11 flows to homogenate mechanism 5 of chain board conveying component, homogenate mechanism 5 adds quantitative acetonitrile to the sample, homogenize afterwards, sample container continues to circulate after accomplishing the homogenate, pour into the utensil stopper graduated flask 62 of placing funnel 61 in filtering and oscillating mechanism 6 through snatching transfer mechanism 2, filtering and oscillating mechanism 6 has the function that the low amplitude of high frequency shakes and the high amplitude of top and bottom vibrates, and the sample accomplishes the filtration in filtering and oscillating mechanism 6 and vibrates the back, shifts to sample output 7 through snatching transfer mechanism 2, and the sample is accomplished acetonitrile looks and water phase layering after standing in utensil stopper graduated flask 62.
The filtering and oscillating mechanism 6 further comprises a measuring cylinder accommodating device 63, an oscillating assembly 64 connected below the measuring cylinder accommodating device 63, a sliding bearing seat 65 connected to the measuring cylinder accommodating device 63 and close to one side of the center of gravity of the device bedplate 1, an oscillating driving assembly 66 connected to the measuring cylinder accommodating device 63 and far away from one side of the center of gravity of the device bedplate 1, a measuring cylinder input end 67 located at one side of the measuring cylinder accommodating device 63 and a plug cover input end 68 located at the other side of the measuring cylinder accommodating device 63.
A section of flexible sheath 611 is arranged at the middle lower part of the straight section of the funnel 61, and a section of flexible rubber coating 612 is arranged at the part where the straight section is connected with the conical section.
The homogenizing mechanism 5 comprises a mechanism seat body 51, an acetonitrile adding component 52 arranged on one side of the mechanism seat body 51, a homogenizing component 53 arranged on the other side of the mechanism seat body 51 and opposite to the acetonitrile adding component 52, a cleaning bin 54 arranged on the device bedplate 1 and used for cleaning a stirring tool bit in the homogenizing component 53, a sliding pressing component 55 arranged on the outer side of the chain plate conveying component 11 on the device bedplate 1, and a right-angle movable backer 56 arranged between the mechanism seat body 51 and the sliding pressing component 55;
an infrared sensor is arranged in the right-angle movable backrest 56, and a plurality of rollers which are vertically arranged are arranged on two vertical arms of the right-angle movable backrest 56.
A limiting mechanism 9 is arranged between the weighing mechanism 4 and the homogenizing mechanism 5 and used for controlling the sample container in the chain plate conveying assembly 11 to be transferred into the homogenizing mechanism 5, after the sample container in the right-angle movable backer 56 is removed, the limiting mechanism 9 rotates a quarter circle through a received signal instruction, and then the sample container is transferred into a new sample container again.
The piston and measuring cylinder accommodating device 63 comprises a crankshaft 631, a housing 632 for accommodating and mounting the crankshaft, a plurality of connecting rods 633 mounted on the crankshaft 631, a piston and measuring cylinder accommodating cavity 634 mounted at the end of the connecting rods 633, and a pneumatic clamping block 635 mounted at the upper part of the housing 632;
the housing 632 is composed of an upper circular ring and a lower circular ring and end covers at two sides, wherein the upper circular ring is provided with a plurality of pore channels for accommodating the up-and-down movement of the connecting rod 633;
the pneumatic clamping block 635 includes: a lower clamping block seat and an upper clamping block, wherein the clamping block seat is provided with a through hole corresponding to the circular hole at the upper part of the shell 632, and the through hole has an outward slope in the radial direction of the shell 632, and the slope is used for providing a certain degree of freedom in the front and back direction when the measuring cylinder accommodating cavity 634 is moved up and down.
The oscillating driving assembly 66 comprises a spindle driving assembly 661, a plurality of sliders mounted at the lower bottom of the spindle driving assembly 661, two rails matched with the sliders, a moving driving assembly 662 for moving the spindle driving assembly 661 along the rails, a mounting frame 663 for supporting the rails and mounting the moving driving assembly 662, and a start and emergency stop switch 664 for manual use. The spindle drive unit 661 can be connected to or disconnected from the crankshaft 631 in the cylinder holder 63 by driving the shift drive unit 662.
The sliding pressing assembly 55 comprises a sliding seat body member 551, a pneumatic disk seat 552 mounted on the upper part of the sliding seat body member 551, and a rotating disk 553 mounted in the pneumatic disk seat 552;
the sliding seat member 551 is provided with a sliding rail groove, and the pneumatic disk seat 552 is matched with the sliding rail groove to drive the rotating disk 553 to slide, and meanwhile, the rotating disk 553 can rotate around the axis of the rotating disk 553.
The bottom of the containing cavity 634 of the measuring cylinder with the plug is provided with a compression spring, the end part of the containing cavity is provided with a locking buckle wire, and the upper part of the compression spring is provided with a gasket.
The vibration assembly 64 includes: a vibration assembly frame body; the vibration assembly frame body is fixedly connected with the installation frame body 663.
Actual use simulation:
A. the position relation and the connection mode are ready;
B. inputting each action sequence and interval time into the program control box 8;
C. transferring a sample to be measured from a sample input end 3 to a station to be measured, quantitatively transferring the sample to a container in a weighing mechanism 4 through a grabbing and transferring mechanism 2, turning a bottom plate in the weighing mechanism 4 downwards after the weight of the sample in the container in the weighing mechanism 4 reaches the standard, enabling the bottom of the container to be in sliding contact with a chain plate conveying assembly 11 at the lower part, transferring the container filled with the sample to a limiting mechanism 9 through the chain plate conveying assembly 11, and at the moment, if no container filled with the sample exists in a sliding pressing assembly 55, enabling the limiting mechanism 9 to be in an unlocked state and transferring the container filled with the sample to the sliding pressing assembly 55;
D. according to a signal instruction, the sliding compression assembly 55 acts to compress a container filled with a sample, meanwhile, the rotating disc 553 rotates to drive the container to rotate, the acetonitrile adding assembly 52 in the homogenizing mechanism 5 is used, a pipe injection port is aligned to the center of the container, quantitative acetonitrile is injected, the homogenizing mechanism 5 is switched to the homogenizing assembly 53, a stirring head in the homogenizing assembly 53 extends into the container to be rotationally stirred, and after stirring is finished, the stirring head rotates to one side of the cleaning bin 54 to clean the stirring head;
E. after the stirring is finished, the sliding compaction component 55 is loosened, and the container filled with the sample continues to flow along with the chain plate conveying component 11;
F. the input end 67 of the measuring cylinder with the plug is used for rotating the measuring cylinder 62 with the plug, which contains a certain amount of sodium chloride, into the measuring cylinder 62 with the plug, the funnel 61 is inserted into the measuring cylinder 62 with the plug, the filter paper is placed in the funnel 61, the measuring cylinder 62 with the plug is rotated into the accommodating cavity 634 with the plug through the grabbing and transferring mechanism 2, and at the moment, the pneumatic clamping block 635 acts to clamp the accommodating cavity 634 with the plug;
G. the grabbing and transferring mechanism 2 pours the stirred sample into the funnel 61 in the step f, at the moment, the oscillating driving assembly 66 is separated from the measuring cylinder accommodating device 63 with the plug by moving the driving assembly 662, at the moment, the vibrating assembly 64 is started, and the filtering is accelerated;
H. after the filtration is finished, stopping the vibration, taking down the funnel 61 by the grabbing and transferring mechanism 2, pressing the plug cover in the plug cover input end 68 onto the plug measuring cylinder accommodating cavity 634, compacting and fastening the plug measuring cylinder 62 in the plug measuring cylinder accommodating cavity 634, starting the movable driving assembly 662 to complete the connection with the plug measuring cylinder accommodating device 63, starting the main shaft driving assembly 661, and rapidly oscillating and swinging the plug measuring cylinder 62 with the sample up and down along with the plug measuring cylinder accommodating cavity 634 through the matching of the crankshaft 631 and the connecting rod 633;
I. and after oscillation is finished, the grabbing and transferring mechanism 2 transfers the sample to a sample output end 7, and the sample is conveyed to a corresponding station and stands to finish the layering of the acetonitrile phase and the water phase.
When the batch test is not performed, the filtering and oscillating mechanism 6 can be manually operated.
The number of the arrangements of the crankshaft 631 and the connecting rods 633 can be designed according to actual needs.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. An extraction device for pretreatment in pesticide residue detection is characterized by comprising a rectangular device bedplate (1), a grabbing and transferring mechanism (2) arranged at the gravity center position of the device bedplate (1), a sample input end (3) and a weighing mechanism (4) arranged at one side of the device bedplate (1), a homogenizing mechanism (5) arranged at the other side of the device bedplate (1), a filtering and vibrating mechanism (6) arranged at the device bedplate (1) and opposite to the sample input end (3), a sample output end (7) arranged at the device bedplate (1) and opposite to the homogenizing mechanism (5), and a program control box (8) arranged in the device bedplate (1);
a circular chain plate conveying assembly (11) taking the gravity center of the device bedplate (1) as an axis is arranged on the device bedplate;
through the control of the program control box (8), the grabbing and transferring mechanism (2) can quantitatively extract a sample container filled with a sample from the sample input end (3) to the weighing mechanism (4), the sample container is transferred to the homogenizing mechanism (5) from the weighing mechanism (4) through the chain plate conveying assembly (11), the homogenizing mechanism (5) adds quantitative acetonitrile into the sample, then homogenate is carried out, the sample container continues to transfer after homogenate is completed, the mixture is poured into a measuring cylinder (62) with a plug, wherein the funnel (61) is placed in the filtering and vibrating mechanism (6) through a grabbing and transferring mechanism (2), the filtering and vibrating mechanism (6) has the functions of high-frequency low-amplitude vibration and high-amplitude vibration, after the sample is filtered and vibrated in the filtering and vibrating mechanism (6), transferring the sample to a sample output end (7) through a grabbing and transferring mechanism (2), and standing the sample in a measuring cylinder (62) with a plug to complete the layering of an acetonitrile phase and a water phase;
the filtering and oscillating mechanism (6) further comprises a measuring cylinder accommodating device (63), an oscillating assembly (64) connected below the measuring cylinder accommodating device (63), a sliding bearing seat (65) connected to the measuring cylinder accommodating device (63) and close to one side of the center of gravity of the device bedplate (1), an oscillating driving assembly (66) connected to the measuring cylinder accommodating device (63) and far away from one side of the center of gravity of the device bedplate (1), a measuring cylinder input end (67) positioned on one side of the measuring cylinder accommodating device (63) and a plug cover input end (68) positioned on the other side of the measuring cylinder accommodating device (63);
the plug measuring cylinder accommodating device (63) comprises a crankshaft (631), a shell (632) for accommodating and mounting the crankshaft, a plurality of connecting rods (633) mounted on the crankshaft (631), a plug measuring cylinder accommodating cavity (634) mounted at the end part of each connecting rod (633), and a pneumatic clamping block (635) mounted at the upper part of the shell (632);
the shell (632) consists of an upper circular ring and a lower circular ring and end covers at two sides, wherein the upper circular ring is provided with a plurality of pore channels for accommodating the up-and-down movement of the connecting rod (633);
the pneumatic clamping block (635) comprises a clamping block seat body at the lower part and a clamping block at the upper part, wherein the clamping block seat body is provided with a through hole corresponding to an annular duct at the upper part of the shell (632), and the through hole has an outward slope in the radial direction of the shell (632), and the slope is used for providing a certain degree of freedom in the front-back direction when the measuring cylinder accommodating cavity (634) moves up and down;
the oscillating driving assembly (66) comprises a main shaft driving assembly (661), a plurality of sliding blocks arranged at the lower bottom of the main shaft driving assembly (661), two rails matched with the sliding blocks, a moving driving assembly (662) used for moving the main shaft driving assembly (661) along the rails, and a mounting frame body (663) used for supporting the rails and mounting the moving driving assembly (662); the oscillating drive assembly 66 is disengaged or connected to the stoppered cylinder receiver 63 by moving the drive assembly 662.
2. The extraction device for the pretreatment in pesticide residue detection as claimed in claim 1, wherein the funnel (61) is provided with a flexible sheath (611) at the middle-lower part of the straight section part, and a flexible rubber coating (612) is arranged at the part where the straight section is connected with the conical section.
3. The extraction device for the pretreatment in the detection of pesticide residue according to claim 1, wherein the homogenizing mechanism (5) comprises a mechanism base (51), an acetonitrile adding component (52) arranged at one side of the mechanism base (51), a homogenizing component (53) arranged at the other side of the mechanism base (51) and opposite to the acetonitrile adding component (52), a cleaning bin (54) arranged on the device bedplate (1) and used for cleaning a stirring tool bit in the homogenizing component (53), a sliding pressing component (55) arranged on the device bedplate (1) and outside the chain plate conveying component (11);
a right-angle movable backer (56) is arranged between the mechanism base body (51) and the sliding pressing component (55);
mechanism pedestal (51) focus position sets up the stand, and the stand tip sets up the crossbeam, and acetonitrile interpolation subassembly (52) and homogenate subassembly (53) set up respectively in one of them one end of crossbeam, and the stand can be followed self axis and go up and down and rotate.
4. The extraction apparatus for pre-treatment in pesticide residue detection as claimed in claim 3, wherein the sliding pressing assembly (55) comprises a sliding base member (551), a pneumatic disc base (552) mounted on the upper part of the sliding base member (551), a rotating disc (553) mounted in the pneumatic disc base (552);
the sliding seat body (551) is provided with a sliding rail groove, the pneumatic disc seat (552) is matched with the sliding rail groove, the rotating disc (553) can be driven to slide, and meanwhile, the rotating disc (553) can rotate around the axis of the rotating disc (553).
5. The extraction device for the pretreatment in pesticide residue detection as claimed in claim 3, characterized in that an infrared sensor is arranged in the right-angle movable backrest (56), and a plurality of vertically arranged rollers are arranged on two vertical arms of the right-angle movable backrest (56).
6. The extraction device for the pretreatment in pesticide residue detection as recited in claim 1, wherein the bottom of the measuring cylinder containing cavity (634) with the plug is provided with a compression spring, the end part is provided with a check thread, and the upper part of the compression spring is provided with a gasket.
7. The extraction device for pretreatment in pesticide residue detection as claimed in claim 1, wherein the vibration assembly (64) comprises a vibration assembly frame body, and the vibration assembly frame body is fixedly connected with the installation frame body (663).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110585988.2A CN113432958B (en) | 2021-05-27 | 2021-05-27 | A extraction element for pretreatment in pesticide residue detects |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110585988.2A CN113432958B (en) | 2021-05-27 | 2021-05-27 | A extraction element for pretreatment in pesticide residue detects |
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| CN113432958A CN113432958A (en) | 2021-09-24 |
| CN113432958B true CN113432958B (en) | 2022-08-23 |
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| JP2007163189A (en) * | 2005-12-09 | 2007-06-28 | Yamaha Motor Engineering Kk | Weighing method, weighing device and preprocessing apparatus for sample analysis |
| CN108627661A (en) * | 2018-03-05 | 2018-10-09 | 武汉纳达康生物科技有限公司 | Sample pretreatment device and sample-pretreating method |
| CN210090139U (en) * | 2019-06-10 | 2020-02-18 | 品创检测(广西)有限公司 | Pesticide detects preceding processing apparatus |
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| WO2005111572A1 (en) * | 2004-05-18 | 2005-11-24 | Eisai R & D Management Co., Ltd. | Sample preparing device and sample preparing method |
| CN207248600U (en) * | 2017-10-16 | 2018-04-17 | 中国科学院、水利部成都山地灾害与环境研究所 | A kind of solid sample extracts pretreating device |
| CN208872581U (en) * | 2018-09-06 | 2019-05-17 | 中信湘雅生殖与遗传专科医院有限公司 | Peripheral blood chromosome liquid feeding blending instrument |
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| CN210090139U (en) * | 2019-06-10 | 2020-02-18 | 品创检测(广西)有限公司 | Pesticide detects preceding processing apparatus |
| CN211799151U (en) * | 2020-03-19 | 2020-10-30 | 江安县食品检验检测中心 | A filter mixing arrangement for incomplete detection of farming |
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