CN106441974B - Automatic sampling instrument for agricultural products - Google Patents
Automatic sampling instrument for agricultural products Download PDFInfo
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- CN106441974B CN106441974B CN201610659890.6A CN201610659890A CN106441974B CN 106441974 B CN106441974 B CN 106441974B CN 201610659890 A CN201610659890 A CN 201610659890A CN 106441974 B CN106441974 B CN 106441974B
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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
- G01N1/02—Devices for withdrawing 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
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
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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
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
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Abstract
The utility model relates to an automatic agricultural product sampling instrument which comprises a cup separating mechanism, a sampling mechanism, a liquid taking mechanism and a test tube feeding mechanism which are arranged on a workbench; the workbench is provided with four-station turntables, the four steps of cup falling, sampling, liquid taking and old cup recycling can be completed after the workbench rotates for one circle, and the workbench is compatible with the design of a sampling mechanism, so that the sampling of different agricultural products can be compatible, and the sampling process and difficulty are simplified; the liquid taking process also adopts four stations to respectively finish liquid taking, releasing, sucking nozzle withdrawing and new sucking nozzle loading, and is finished in an arc space, and the four stations are organically connected with a four-station turntable, so that the structure is more compact, the degree of automation is high, the detection process has the characteristic of no need of professional personnel operation, the liquid taking device can be widely applied to various links of agricultural product production, sales and processing, and the processes of sampling, liquid taking detection and the like are automatically finished by replacing manual detection by machinery.
Description
Technical field:
the utility model belongs to the field of detection sampling equipment, and particularly relates to an automatic agricultural product sampling instrument.
The background technology is as follows:
with the prominence of food safety issues, more and more people begin to appreciate dietary safety. In ordinary life, people first pay attention to whether fruits, vegetables and meats on dining tables have pesticide residues or not. However, as the method for detecting the pesticide residues on fruits and vegetables in the market is complicated, the detection flow is complex, the operation requirement is high, most professionals who require a certain operation level detect the pesticide residues, and the number of people meeting the operation standard in the market at present is small, so that the detection timeliness is not strong, the detection effect is not ideal, even human negligence is caused, and the like. How to provide a kind of automation degree is high, does not need professional inspector, adapts to the check out test set of various service environment, namely become the object of the study of the utility model.
The utility model comprises the following steps:
the utility model aims to invent an agricultural product automatic sampling instrument which automatically completes a sampling flow before fruit, vegetable and meat product detection by a machine.
The technical scheme of the utility model is realized as follows: an automatic sampling instrument for agricultural products comprises a workbench, a cup separating mechanism, a sampling mechanism, a liquid taking mechanism and a test tube feeding mechanism; the method is characterized in that:
a working table: the turntable is provided with an upper layer of table top, a middle layer of table top and a lower layer of table top, the middle layer of table top is positioned with a turntable with an annular structure through a bearing, a plurality of notches are uniformly distributed on the circumference of the turntable, and a supporting plate and a weighing sensor are arranged on each notch; an annular gear is fixed below the turntable; the lower table top is provided with a station motor and a sampling motor, a station motor shaft drives a first gear, the first gear is meshed with the annular gear, and the turntable is driven to rotate to a design station; the cup separating mechanism, the sampling mechanism, the liquid taking mechanism and the test tube feeding mechanism are distributed on the upper table top and the middle table top, and the upper table top is correspondingly provided with a cup falling hole, a sampling hole, a liquid taking hole and a tube falling hole which lead to the middle table top;
cup separating mechanism: comprises a cup separating seat, a cup separating cover, an outer gear ring, a cup separating gear and a stepping motor; the outer tooth wheel and the through hole are concentrically and rotatably positioned on the cup separating seat, and the plurality of cup separating gears are uniformly distributed on the periphery of the outer tooth wheel, meshed with the outer tooth wheel and restrained between the cup separating seat and the cup separating cover; a cup separating spiral wheel is fixed on the cup separating gear, a plurality of cup separating spiral wheels jointly support the sample cups which are nested together, the cup separating spiral wheel rotates for a circle to remove the support of one sample cup, and the sample cup falls from the through hole, the cup falling hole on the middle table surface and falls onto the supporting plate corresponding to the turntable; the output of the stepping motor is in transmission connection with the outer teeth;
sampling mechanism: comprises a feeding assembly arranged on the upper table top and a sampling cutter assembly arranged on the middle table top; the feeding assembly comprises a feeding seat, a feeding motor, a screw rod, a sliding block and a cup seat; the feeding motor and the screw rod are respectively positioned at two sides of the feeding seat and are in transmission connection through the gear pair; the sliding block is positioned on the cup seat guide rail in a sliding way, is matched with the screw rod through the screw nut, drives the sliding block to move up and down by the screw rod, and drives the cup seat fixed at the lower part of the sliding block to move up and down, and the cup seat can descend to pass through the sampling hole; the cup seat is provided with a cup cavity which can accommodate and position the collecting cup; the sampling cutter assembly comprises a sampling motor, a gearbox and a cutter, wherein a sampling motor shaft drives the cutter to rotate through the gearbox; the cutter is of a conical structure built by a plurality of triangular blades, the upper part of the cutter faces the collecting cup, and the lower part of the cutter faces the sampling cup on the supporting plate;
liquid taking mechanism: the liquid taking device comprises a liquid taking device seat and a suction pipe assembly, wherein the suction pipe assembly is movably positioned on the liquid taking device seat by virtue of a lifting seat, one side of the lifting seat is positioned on a guide post of the liquid taking device seat by virtue of a linear bearing, and the other side of the lifting seat is provided with a rack; the liquid taking device seat is provided with a liquid taking gear driven by a lifting steering engine, and the liquid taking gear is meshed with the rack to drive the lifting seat to reciprocate with the suction pipe assembly; the liquid taking device seat is positioned on the upper table top through a rotating shaft, a swing gear is fixed on the rotating shaft and meshed with a gear on an output shaft of a liquid taking motor fixed on the bottom surface of the upper table top, and the liquid taking motor drives a suction pipe assembly to finish the actions of sucking liquid, releasing and replacing a suction nozzle at different stations; a suction nozzle material seat is arranged on the middle table surface of the swing track of the suction pipe assembly;
test tube feed mechanism: the automatic sampling device comprises a bin assembly arranged on an upper table top and a test tube rotating seat movably positioned on a middle table top, wherein the bin assembly is embedded in a pipe falling hole of the upper table top, and directly-arranged test tubes discharged from the pipe outlet of the bin assembly fall into the test tube rotating seats right below one by one to wait for receiving sampling liquid released by the suction tube assembly.
The gearbox of sampling cutter assembly drives has a pair of cutter, and a pair of cutter symmetry distributes in sampling motor shaft both sides, and cutter and gearbox can rotate around the sampling motor shaft.
The gearbox in the sampling cutter assembly is positioned on a sampling motor shaft through a bearing, a gear fixed on the sampling motor shaft is meshed with cutter gears symmetrically distributed in the gearbox, the cutter gears are positioned on the gearbox through a hollow shaft, and the bottoms of cutters are locked on the upper end face of the hollow shaft; the sampling motor shaft is sleeved with a shaft sleeve, the upper end part of the shaft sleeve is locked on the upper end part and the lower end part of the gearbox, a large gear is fixed on the upper end part and the lower end part of the shaft sleeve, the large gear is meshed with a second driving gear arranged on the station motor shaft, and the station motor drives the turntable to shift and synchronously shift a pair of cutters.
The straw assembly comprises a straw, a pipe sleeve, a lifting seat and a liquid suction steering engine; the pipe sleeve is sleeved outside the suction pipe, the pipe sleeve and the suction pipe are respectively positioned on the lifting seat, the abduction part at the top end of the pipe sleeve can be contacted by the liquid extractor seat when the lifting seat is lifted to be close to the high position, the pipe sleeve is forced to downwards shift relative to the suction pipe, and the suction nozzle sleeved at the lower end part of the suction pipe can be ejected out to realize the action of replacing the suction nozzle; the liquid suction steering engine drives a cam which is abutted against the piston end of the suction pipe, and the cam rotates to drive the suction pipe to suck or release.
The bin assembly is provided with a feed hopper, a circular cavity, a rotary test tube fork and a discharge port; the thickness of the circular cavity can accommodate a test tube, the outlet pipe opening is positioned in the vertical downward direction tangential to the circular cavity, and the lower part of the feed hopper cuts into the circular cavity; the rotary test tube fork is arranged on the center of the circular cavity, the rotary test tube fork is provided with a plurality of radial fork handles, the front ends of the fork handles are provided with tangential fork rods, the plurality of fork rods face the same rotation direction, the inverted test tubes are hooked from the lower part of the feed hopper during rotation, and the test tubes are sent into the pipe opening after half a period of rotation and are discharged one by one into the test tube rotating seat which falls under the feed hopper; the test tube rotating seat is characterized in that a plurality of test tube jacks are uniformly distributed on the same circumference of the test tube rotating seat, and under the drive of a tube seat motor, the test tube jacks on the test tube rotating seat are located under the tube outlet one by one to accept the dropped test tubes.
Four notches are arranged on the rotary table and correspond to the cup falling, sampling, liquid taking and recycling stations respectively.
The rotating disk is provided with a baffle plate at the rotating rear edge of the notch; the recovery station is correspondingly provided with a sampling cup guide plate which is fixed at the bottom of the upper table top and extends to the outer edge of the turntable.
According to the utility model, manual detection is replaced by machinery, processes such as sampling, liquid taking detection and the like are automatically completed, in particular, four steps of cup falling, sampling, liquid taking and recycling of old cups can be completed by adopting a four-station turntable to rotate for one circle, and the sampling mechanism is matched, so that sampling of different agricultural products can be compatible, and the sampling process and difficulty are simplified; the liquid taking process also adopts four stations to respectively finish liquid taking, releasing, suction nozzle withdrawing and new suction nozzle feeding, and is finished in an arc space, and the four stations are organically connected with the rotary table, so that the structure is more compact, the degree of automation is high, and the detection process has the characteristic of no need of professional personnel operation, and can be widely applied to various links of agricultural product production, sales and processing.
Description of the drawings:
the utility model is further described with reference to the following specific drawings:
figure 1 is a schematic perspective view of a sampling instrument
Figure 2 is an exploded view of three layers of table tops of the sampling instrument workbench
FIG. 3 is an exploded view of the table top
FIG. 4 is an exploded view of the cup separating mechanism
FIG. 5 is a schematic view of the positional relationship between the feed assembly and the sampling tool assembly
FIG. 6 is a schematic cross-sectional view of a sampling tool assembly
FIG. 7 is a schematic perspective view of a liquid taking mechanism
FIG. 8 is a schematic view of a test tube feeding mechanism
Wherein the method comprises the steps of
11-upper table top 111-cup falling hole 112-sampling hole 113-liquid taking hole
114-pipe hole 12-middle table top 13-lower table top 2-turntable
21-notch 22-supporting plate 23-weighing sensor 24-annular gear
25-station motor 26-first gear 27-second gear 28-baffle
29-guide plate 31-cup separating seat 310-through hole 32-cup separating cover
33-outer gear ring 34-cup separating gear 341-cup separating spiral wheel 35-step motor
4-feeding assembly 41-feeding seat 42-feeding motor 43-screw rod
44-slide block 45-cup seat 46-gear pair 47-cup seat guide rail
5-sampling tool assembly 51-sampling motor 511-sampling motor shaft 52-gearbox
521-gear 522-cutter gear 523-hollow shaft 524-sleeve
525-large gear 53-cutter 6-suction pipe assembly 61-liquid taking device seat
611-guide post 612-liquid taking gear 613-swinging gear 62-lifting seat
621-linear bearing 622-rack 63-liquid taking motor 64-suction nozzle material seat
65-straw 66-pipe sleeve 67-cam 68-storage bucket
69-universal wheel 7-stock bin assembly 71-feed hopper 72-circular cavity
73-rotating test tube fork 731-fork handle 732-fork lever 74-outlet port
8-test tube rotating seat 81-test tube jack 82-tube seat motor 9-sampling cup
91-collection cup 92-suction nozzle 93-test tube
The specific embodiment is as follows:
referring to fig. 1, 2 and 3, the automatic agricultural product sampling instrument comprises a workbench, a cup separating mechanism, a sampling mechanism, a liquid taking mechanism and a test tube feeding mechanism; wherein:
a working table: the rotary table comprises an upper table top 11, a middle table top 12 and a lower table top 13, wherein the middle table top 12 is positioned with a rotary table 2 with an annular structure through a bearing, a plurality of notches 21 are uniformly distributed on the circumference of the rotary table 2, and a supporting plate 22 and a weighing sensor 23 are arranged on each notch 21; an inner gear ring 24 is fixed below the turntable 2; the lower table top 13 is provided with a station motor 25 and a sampling motor, and a station motor shaft drives a first gear 26 which is meshed with the annular gear 24 to drive the turntable 2 to rotate to a design station.
Specifically, four notches 21 are provided on the turntable 2, and the positions of cup falling, sampling, liquid taking and recovering are respectively corresponding to each other, that is, the turntable 2 rotates for one circle, and all the procedures can be completed by the sampling cups 9 on each supporting plate 22. In order to smoothly recycle the sampling cup 9, a baffle 28 is arranged on the rotating rear edge of the notch of the turntable 2; the recovery station is correspondingly provided with a sampling cup guide plate 29, and the guide plate 29 is fixed at the bottom of the upper table top 11 and extends to the outer edge of the rotary table 2, so that the used sampling cup is pushed out to the outer side of the rotary table and falls into the received collecting barrel.
Cup separating mechanism, sampling mechanism, liquid taking mechanism and test tube feeding mechanism are also distributed on the upper table top 11 and the middle table top 12, and the upper table top 11 is correspondingly provided with a cup falling hole 111, a sampling hole 112, a liquid taking hole 113 and a tube falling hole 114 which are communicated with the middle table top 12.
With reference to fig. 4, the cup separating mechanism: comprises a cup separating seat 31, a cup separating cover 32, an outer gear ring 33, a cup separating gear 34 and a stepping motor 35; the cup separating seat 31 and the cup separating cover 32 are provided with a cup falling through hole 310, the outer gear ring 33 and the through hole 310 are concentrically positioned on the cup separating seat 31 in a rotating way, a plurality of cup separating gears 34 are uniformly distributed on the periphery of the outer gear ring 33, meshed with the outer gear ring 33 and restrained between the cup separating seat 31 and the cup separating cover 32; a cup separating spiral wheel 341 is fixed on the cup separating gear 34, the sleeved sampling cups 9 are supported together by a plurality of cup separating spiral wheels 341, the cup separating spiral wheel 341 rotates for one circle to remove the support of one sampling cup 9, and the sampling cup falls onto the supporting plate 22 corresponding to the turntable 2 from the through hole 310, the cup falling hole 111 of the middle table top; the output of the stepping motor 35 is in transmission connection with the outer gear ring 33, and the stepping motor 35 drives the cup separating action.
With reference to fig. 5 and 6, the sampling mechanism: comprising a feeding assembly 4 arranged on an upper table top 11 and a sampling cutter assembly 5 arranged on a middle table top 12; the feed assembly 4 comprises a feed seat 41, a feed motor 42, a screw 43, a slide block 44 and a cup seat 45; the feed motor 42 and the screw 43 are respectively positioned at two sides of the feed seat 41 and are in transmission connection through a gear pair 46, and the feed motor 42 drives the screw 43 to rotate positively and negatively; the sliding block 44 is slidably positioned on the cup holder guide rail 47 and is matched with the screw rod 43 through the screw nut, the screw rod 43 drives the sliding block 44 to move up and down, and drives the cup holder 45 fixed at the lower part of the sliding block 44 to move up and down, and the cup holder 45 can gradually descend to pass through the sampling hole 112 to finish the sampling action; the cup holder 45 has a cup cavity that can receive and position the collection cup 91, the collection cup 91 being used to hold a bulk sample of agricultural product for removal.
The sampling cutter assembly 5 comprises a sampling motor 51, a gearbox 52 and a cutter 53, wherein the sampling motor shaft 511 drives the cutter 53 to rotate through the gearbox 52, and cuts the agricultural product block sample in the collection cup 91 into powder or a lake shape; the cutter 53 is in a conical structure built by a plurality of triangular blades 531, the upper part of the cutter 53 is opposite to the collecting cup 91, the lower part of the cutter 53 is opposite to the sampling cup 9 on the supporting plate, and the cut fragments directly fall into the sampling cup 9; further, the gearbox 52 of the sampling cutter assembly 5 is driven with a pair of cutters 53, the cutters 53 are symmetrically distributed on both sides of the sampling motor shaft, and the cutters 53 and the gearbox 52 can rotate around the sampling motor shaft 511, so that one cutter is in cutting operation, and the other cutter is in cleaning state, and the cutting operation are alternately performed, thereby ensuring sampling efficiency and avoiding cross contamination.
Specifically, the gearbox 52 in the sampling cutter assembly 5 is positioned on the sampling motor shaft 511 through a bearing, a gear 521 fixed on the sampling motor shaft 511 is meshed with a cutter gear 522 symmetrically distributed in the gearbox, the cutter gear 522 is positioned on the gearbox 52 through a hollow shaft 523, and the bottom of the cutter 53 is locked on the upper end face of the hollow shaft 523; a shaft sleeve 524 is sleeved on the sampling motor shaft 511, the upper end part of the shaft sleeve 524 is locked on the upper end part and the lower end part of the gearbox 52, a large gear 525 is fixed on the upper end part of the shaft sleeve, the large gear 525 is meshed with a second driving gear 27 arranged on the shaft of the station motor 25, and the station motor drives the turntable 2 to shift and synchronously shift a pair of cutters 53. The cutter gear 522 and the hollow shaft 523 may be of a one-piece structure as in the present example, or of a split structure.
Referring to fig. 7, the liquid taking mechanism: the liquid taking device comprises a suction pipe assembly 6 and a liquid taking device seat 61, wherein the suction pipe assembly 6 is movably positioned on the liquid taking device seat 61 by virtue of a lifting seat 62, one side of the lifting seat 62 is positioned on a guide post 611 of the liquid taking device seat 61 by virtue of a linear bearing 621, and the other side of the lifting seat 62 is provided with a rack 622; a liquid taking gear 612 driven by a lifting steering engine is arranged on the liquid taking device seat 61, the liquid taking gear 612 is meshed with a rack 622, and the lifting seat 62 is driven to reciprocate with the suction pipe assembly 6; the liquid taking device seat 61 is positioned on the upper table top 11 through a rotating shaft, a swing gear 613 is fixed on the rotating shaft, the swing gear 613 is meshed with a gear fixed on the output shaft of the liquid taking motor 63 on the bottom surface of the upper table top 11, and the liquid taking motor 63 drives the suction pipe assembly 6 to complete the actions of sucking liquid, releasing and replacing a suction nozzle at different stations; the suction nozzle material seat 64 is arranged on the middle table top 12 of the swing track of the suction pipe assembly 6, and a clean suction nozzle 92 is prepared in the suction nozzle material seat 64, so that after each extraction and release is finished, a new suction nozzle 92 is replaced, and cross contamination is avoided. In order to keep the operation of the extractor base 61 stable, a universal wheel 69 is arranged at the overhanging end, and the universal wheel 69 can roll on the upper table top 11 to support the swinging operation of the extractor base 61.
More specifically, the suction pipe assembly 6 includes a suction pipe 65, a pipe sleeve 66, a lifting seat 62 and a suction steering engine; the pipe sleeve 66 is sleeved outside the suction pipe 65, the pipe sleeve 66 and the suction pipe 65 are respectively positioned on the lifting seat 62, when the lifting seat 62 is lifted to be close to the high position, the abduction part at the top end of the pipe sleeve 66 can be abutted by the liquid extractor seat 61, the pipe sleeve 66 is forced to downwards shift relative to the suction pipe 65, and the suction nozzle 92 sleeved at the lower end part of the suction pipe 65 can be ejected out to realize the suction nozzle replacement action; the pipetting steering engine drives a cam 67, the cam 67 abuts against the piston end of the pipette 65, and the cam 67 rotates to drive the pipette 65 to aspirate or discharge the sample liquid.
As shown in fig. 2, the motion track of the straw assembly 6 is an arc line, so that the liquid taking hole 113 formed on the upper table top 11 is also arc-shaped, and the two ends of the stroke of the straw assembly 6 correspond to the position right above a test tube jack 81 of the test tube rotating seat 8 and a supporting plate 22 of the turntable 2 on the middle table top 12, so as to finish the liquid taking and the liquid sampling releasing actions; a suction nozzle holder 64 and a storage bucket 68 are provided on the intermediate table 12 between the test tube rotating holder 8 and the turntable 2, and the storage bucket 68 is used for collecting the suction nozzle 92 after replacement or guiding it into a storage bucket below. When the suction pipe assembly 6 moves to the two stations, the used suction nozzle 92 is completely retracted, a new suction nozzle is sleeved in the suction nozzle material seat 64, and then the suction pipe assembly moves to the position of the rotary table 2, and then the sampling liquid is sucked.
Referring to fig. 8, test tube feeding mechanism: comprises a bin assembly 7 arranged on the upper table top 11 and a test tube rotating seat 8 movably positioned on the middle table top 12, wherein the bin assembly 7 is embedded in a pipe dropping hole 114 of the upper table top 11.
The bin assembly 7 has a feed hopper 71, a circular cavity 72, a rotating test tube fork 73 and a discharge port 74; the thickness of the circular cavity 72 can accommodate a test tube, the outlet 74 is in the vertical downward direction tangential to the circular cavity 72, and the lower part of the feed hopper 71 cuts into the circular cavity 72; the rotary test tube fork 73 is arranged on the center of the circular cavity 72, the rotary test tube fork 73 is provided with a plurality of radial fork handles 731, tangential fork bars 732 are arranged at the front ends of the fork handles 731, the plurality of fork bars 732 face the same rotation direction, the inverted test tubes 93 are hooked from the lower part of the feed hopper 71 during rotation, the test tubes are sent into the outlet pipe orifice 74 after rotating for half a period, the upright test tubes 93 are discharged from the outlet pipe orifice 74, fall into the test tube rotating seat 8 under the suction pipe assembly 6 one by one, and wait for receiving sampling liquid released by the suction pipe assembly 6;
referring to fig. 3, a plurality of test tube jacks 81 are uniformly distributed on the same circumference of the test tube rotating seat 8, and under the drive of the tube seat motor 82, the test tube jacks 81 on the test tube rotating seat are located under the tube opening 74 one by one to accommodate the dropped test tubes 93. After the test tube 93 is filled with the sample liquid, the sample liquid is manually taken out and placed in a detection box for detection.
Claims (7)
1. An automatic sampling instrument for agricultural products comprises a workbench, a cup separating mechanism, a sampling mechanism, a liquid taking mechanism and a test tube feeding mechanism; the method is characterized in that:
a working table: the turntable is provided with an upper layer of table top, a middle layer of table top and a lower layer of table top, the middle layer of table top is positioned with a turntable with an annular structure through a bearing, a plurality of notches are uniformly distributed on the circumference of the turntable, and a supporting plate and a weighing sensor are arranged on each notch; an annular gear is fixed below the turntable; the lower table top is provided with a station motor and a sampling motor, a station motor shaft drives a first gear, the first gear is meshed with the annular gear, and the turntable is driven to rotate to a design station; the cup separating mechanism, the sampling mechanism, the liquid taking mechanism and the test tube feeding mechanism are distributed on the upper table top and the middle table top, and the upper table top is correspondingly provided with a cup falling hole, a sampling hole, a liquid taking hole and a tube falling hole which lead to the middle table top;
cup separating mechanism: comprises a cup separating seat, a cup separating cover, an outer gear ring, a cup separating gear and a stepping motor; the outer tooth wheel and the through hole are concentrically and rotatably positioned on the cup separating seat, and a plurality of cup separating gears are uniformly distributed on the periphery of the outer tooth wheel, meshed with the outer tooth wheel and restrained between the cup separating seat and the cup separating cover; a cup separating spiral wheel is fixed on the cup separating gear, a plurality of cup separating spiral wheels jointly support the sample cups which are nested together, the cup separating spiral wheel rotates for a circle to remove the support of one sample cup, and the sample cup falls from the through hole, the cup falling hole on the middle table surface and falls onto the supporting plate corresponding to the turntable; the output of the stepping motor is in transmission connection with the outer teeth;
sampling mechanism: comprises a feeding assembly arranged on the upper table top and a sampling cutter assembly arranged on the middle table top; the feeding assembly comprises a feeding seat, a feeding motor, a screw rod, a sliding block and a cup seat; the feeding motor and the screw rod are respectively positioned at two sides of the feeding seat and are in transmission connection through the gear pair; the sliding block is positioned on the cup seat guide rail in a sliding way, is matched with the screw rod through the screw nut, drives the sliding block to move up and down by the screw rod, and drives the cup seat fixed at the lower part of the sliding block to move up and down, and the cup seat can descend to pass through the sampling hole; the cup seat is provided with a cup cavity which can accommodate and position the collecting cup; the sampling cutter assembly comprises a sampling motor, a gearbox and a cutter, wherein a sampling motor shaft drives the cutter to rotate through the gearbox; the cutter is of a conical structure built by a plurality of triangular blades, the upper part of the cutter faces the collecting cup, and the lower part of the cutter faces the sampling cup on the supporting plate;
liquid taking mechanism: the liquid taking device comprises a liquid taking device seat and a suction pipe assembly, wherein the suction pipe assembly is movably positioned on the liquid taking device seat by virtue of a lifting seat, one side of the lifting seat is positioned on a guide post of the liquid taking device seat by virtue of a linear bearing, and the other side of the lifting seat is provided with a rack; the liquid taking device seat is provided with a liquid taking gear driven by a lifting steering engine, and the liquid taking gear is meshed with the rack to drive the lifting seat to reciprocate with the suction pipe assembly; the liquid taking device seat is positioned on the upper table top through a rotating shaft, a swing gear is fixed on the rotating shaft and meshed with a gear on an output shaft of a liquid taking motor fixed on the bottom surface of the upper table top, and the liquid taking motor drives a suction pipe assembly to finish the actions of sucking liquid, releasing and replacing a suction nozzle at different stations; a suction nozzle material seat is arranged on the middle table surface of the swing track of the suction pipe assembly;
test tube feed mechanism: the automatic sampling device comprises a bin assembly arranged on an upper table top and a test tube rotating seat movably positioned on a middle table top, wherein the bin assembly is embedded in a pipe falling hole of the upper table top, and directly-arranged test tubes discharged from the pipe outlet of the bin assembly fall into the test tube rotating seats right below one by one to wait for receiving sampling liquid released by the suction tube assembly.
2. The automatic agricultural product sampling instrument according to claim 1, characterized in that: the gearbox of sampling cutter assembly drives has a pair of cutter, and a pair of cutter symmetry distributes in sampling motor shaft both sides, and cutter and gearbox can rotate around the sampling motor shaft.
3. An automatic sampler for agricultural products according to claim 1 or 2, characterized in that: the gearbox in the sampling cutter assembly is positioned on a sampling motor shaft through a bearing, a gear fixed on the sampling motor shaft is meshed with a pair of symmetrically distributed cutter gears in the gearbox, the cutter gears are positioned on the gearbox through a hollow shaft, and the bottom of a cutter is locked on the upper end face of the hollow shaft; the sampling motor shaft is sleeved with a shaft sleeve, the upper end part of the shaft sleeve is locked on the upper end part and the lower end part of the gearbox, a large gear is fixed on the upper end part and the lower end part of the shaft sleeve, the large gear is meshed with a second driving gear arranged on the station motor shaft, and the station motor drives the turntable to shift and synchronously shift a pair of cutters.
4. The automatic agricultural product sampling instrument according to claim 1, characterized in that: the straw assembly comprises a straw, a pipe sleeve, a lifting seat and a liquid suction steering engine; the pipe sleeve is sleeved outside the suction pipe, the pipe sleeve and the suction pipe are respectively positioned on the lifting seat, the abduction part at the top end of the pipe sleeve can be contacted by the liquid extractor seat when the lifting seat is lifted to be close to the high position, the pipe sleeve is forced to downwards shift relative to the suction pipe, and the suction nozzle sleeved at the lower end part of the suction pipe can be ejected out to realize the action of replacing the suction nozzle; the liquid suction steering engine drives a cam which is abutted against the piston end of the suction pipe, and the cam rotates to drive the suction pipe to suck or release.
5. The automatic agricultural product sampling instrument according to claim 1, characterized in that: the feed bin assembly is provided with a feed hopper, a circular cavity, a rotary test tube fork and a discharge port; the thickness of the circular cavity can accommodate a test tube, the outlet pipe opening is positioned in the vertical downward direction tangential to the circular cavity, and the lower part of the feed hopper cuts into the circular cavity; the rotary test tube fork is arranged on the center of the circular cavity, the rotary test tube fork is provided with a plurality of radial fork handles, the front ends of the fork handles are provided with tangential fork rods, the plurality of fork rods face the same rotation direction, the inverted test tubes are hooked from the lower part of the feed hopper during rotation, and the test tubes are sent into the pipe opening after half a period of rotation and are discharged one by one into the test tube rotating seat which falls under the feed hopper; the test tube rotating seat is characterized in that a plurality of test tube jacks are uniformly distributed on the same circumference of the test tube rotating seat, and under the drive of a tube seat motor, the test tube jacks on the test tube rotating seat are located under the tube outlet one by one to accept the dropped test tubes.
6. The automatic agricultural product sampling instrument according to claim 1, characterized in that: four notches are arranged on the rotary table and correspond to the cup falling, sampling, liquid taking and recycling stations respectively.
7. An automatic sampler for agricultural products according to claim 1 or 6, characterized in that: the rotating disk is provided with a baffle plate at the rotating rear edge of the notch; the recovery station is correspondingly provided with a sampling cup guide plate which is fixed at the bottom of the upper table top and extends to the outer edge of the turntable.
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