CN110694775B

CN110694775B - Sample preparation system

Info

Publication number: CN110694775B
Application number: CN201911254058.8A
Authority: CN
Inventors: 邢春超; 孟岩; 张桂玲; 徐金帅
Original assignee: Ant Source Scientific Instrument (beijing) Co Ltd
Current assignee: Ant Source Scientific Instrument (beijing) Co Ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-03-27
Anticipated expiration: 2039-12-10
Also published as: CN110694775A

Abstract

The present invention relates to a sample preparation system, comprising: the grinding mechanism is used for grinding a sample to be processed; the screening and weighing mechanism is used for screening qualified samples and weighing the qualified samples, and returning unqualified samples to the grinding mechanism; and the division mechanism is used for carrying out division processing on the qualified samples according to a set division proportion. The sample preparation system integrates grinding, screening, weighing and division, and can realize automatic sample preparation.

Description

Sample preparation system

Technical Field

The invention relates to the technical field of sample preparation, in particular to a sample preparation system integrating grinding, screening, weighing and division.

Background

At present, most of existing equipment is independent working equipment, then a workflow system is formed manually, and all links need manual feeding and material taking. For example, grinding devices, sieving devices, reduction devices. In addition, in the existing grinding equipment (such as a disc grinder), a sample enters a grinding disc from a feeding funnel, the granularity of the discharged sample is controlled by manually adjusting the gap between two grinding discs, the gap between the two grinding discs is manually adjusted, and the defects that the grinding disc gap is required to be manually adjusted, the material storage condition occurs in a grinding cavity and the like exist. In the existing dividing equipment, a motor drives a dividing pipe to do circular motion, a sample enters the dividing pipe from a static funnel, a dividing pipe opening corresponds to a conical divider, and a plurality of discharging collecting openings with certain angles are reserved on the conical surface of the conical divider, so that the sample accounting for a certain proportion of the total sample can be divided, and the defects that the dividing proportion needs to be manually adjusted, the divided sample cannot be automatically bagged and the like exist.

Disclosure of Invention

The invention aims to solve the technical problem of providing a sample preparation system integrating grinding, screening, weighing and division into a whole.

The invention is realized by the following technical scheme:

a sample preparation system, the system comprising:

the grinding mechanism is used for grinding a sample to be processed;

the screening and weighing mechanism is used for screening qualified samples and weighing the qualified samples, and returning unqualified samples to the grinding mechanism;

the division mechanism is used for carrying out division processing on the qualified sample according to a set division proportion;

the plastic packaging bag conveying and marking mechanism is used for spraying the required information on the plastic packaging bag and conveying the information to a specified position;

the plastic packaging bag clamping and conveying mechanism is used for clamping the sprayed plastic packaging bag from the specified position to a division discharge port of the division mechanism for loading; and

and the plastic package bag sealing mechanism is used for sealing the plastic package bag after being charged. Further, in the sample preparation system, the grinding mechanism comprises a static grinding disc, a movable grinding disc and a grinding cavity formed between the static grinding disc and the movable grinding disc; the first driving motor controls the movable grinding disc to rotate through the main shaft; the first driving motor is arranged on the sliding table, and the first adjusting motor controls the sliding table to drive the movable grinding disc to move along a guide rail fixedly connected to the bottom plate.

Further, the sample preparation system, grind the chamber with grind the feed inlet of grinding mechanism with grind the discharge gate intercommunication, the top of grinding the chamber sets up the mouth of blowing, grind feed inlet department and set up the induction port.

Further, a sample preparation system, screening and weighing mechanism include the casing, set up in multilayer screen cloth in the casing, set up in one side top of multilayer screen cloth the screening feed inlet set up in the guide plate of the opposite side below of multilayer screen cloth, set up in the collecting vessel of weighing of multilayer screen cloth below, and set up in the screening feed back mouth of guide plate below, the screening feed back mouth with grinding mechanism's grinding feed inlet intercommunication.

Further, in the sample preparation system, the guide plate comprises a main plate rotating with one end as a circle center, and an auxiliary plate arranged at the other end of the main plate; according to the set requirement, the guide plate rotates to the side edge of one of the screens of the multiple layers of screens, the auxiliary plate guides the qualified samples to the weighing and collecting barrel, and the main plate guides the unqualified samples to the screening feed back port.

Furthermore, in the sample preparation system, the division mechanism comprises an upper cone shell, a lower cone shell, an adjusting cone plate and a spreading pipe, wherein the bottom surface of the upper cone shell is opposite to the bottom surface of the upper cone shell; the adjusting cone plate is provided with a discharging adjusting opening, and the lower cone shell is provided with a lower cone discharging opening corresponding to the discharging adjusting opening.

Further, a sample preparation system, plastic envelope bag conveying marking mechanism include transport mechanism, set up in the plastic envelope bag box of transport mechanism one end, set up in the ink jet numbering device of plastic envelope bag box top with set up in the spacing clamp of transport mechanism other end below.

Further, a sample preparation system, plastic envelope bag centre gripping transmission device set up in the below of division mechanism, its include with the coaxial carousel of division mechanism, outwards set up along its circumference on the carousel and follow the big mechanical clamp that the tangential direction of carousel opened and shut, the outer end of a pair of big mechanical arm of big mechanical clamp sets up a pair of after being used for the centre gripping spraying the little mechanical clamp of plastic envelope bag relatively.

Further, in the sample preparation system, the plastic bag sealing mechanism is arranged on a transmission track of the plastic bag clamping and transmitting mechanism, and comprises a rack, a linear bearing which linearly moves along the rack, and a pair of pressing wheels arranged on the linear bearing.

The invention has the advantages and effects that:

1. the sample preparation system provided by the invention comprises a grinding mechanism, a screening and weighing mechanism and a division mechanism, integrates grinding, screening, weighing and division into a whole, and can realize automatic sample preparation.

2. The grinding mechanism of the sample preparation system provided by the invention adopts the adjusting motor to control the movable grinding disc to move, and the automatic adjustment of the grinding cavity gap is realized. A cyclone separator can be adopted in a feeding hopper arranged at a grinding feeding hole of the grinding mechanism, so that the purposes of automatic feeding and circular grinding are realized.

3. The air blowing port and the air suction port can be arranged in the grinding cavity of the grinding mechanism of the sample preparation system, after the grinding work is finished, the blowing and dust collection operation can be automatically carried out, and the excess material collection and the automatic cleaning of the grinding cavity are realized.

4. The screening and weighing mechanism of the sample preparation system provided by the invention adopts a plurality of layers of screens, so that the problem of collecting samples with different particle sizes is solved.

5. The division mechanism of the sample preparation system provided by the invention is provided with the adjusting conical plate, the adjusting motor controls the adjusting conical plate to rotate, and the division proportion can be automatically adjusted according to setting.

6. The sample preparation system provided by the invention comprises a grinding mechanism, a screening and weighing mechanism, a shrinking and separating mechanism, a plastic package conveying and marking mechanism, a plastic package clamping and transmitting mechanism and a plastic package sealing mechanism, and integrates grinding, screening, weighing, shrinking and separating, marking and packaging into a whole, so that automatic sample preparation can be realized. An operator only needs to add a certain amount of sample into the equipment and set parameters (sample weight, sample granularity and the like) to obtain a packaged qualified sample.

7. The sample preparation system provided by the invention can simultaneously grind the mechanism, the screening and weighing mechanism and the dividing mechanism, and is provided with an air blowing port and an air suction port, wherein air blowing is provided by an air compressor, and air suction is provided by a dust collector. After the system is finished, high-pressure gas can be blown in to form turbulent flow to blow and suck away the stored materials, so that the aims of collecting and cleaning excess materials are fulfilled. When the system does not need purging, the blowing pipeline and the suction pipeline are in a closed state, and when purging is needed, the two pipelines are simultaneously opened.

Drawings

FIGS. 1 to 3 show schematic structural views of a sample preparation system provided by the present invention;

FIGS. 4 and 5 are schematic structural views of a grinding mechanism of a sample preparation system provided by the present invention;

FIGS. 6 and 7 are schematic structural views of a screening and weighing mechanism of the sample preparation system provided by the present invention;

FIGS. 8 and 9 are schematic structural diagrams of a first embodiment of the division mechanism of the sample preparation system provided by the present invention;

FIG. 10 is a schematic diagram showing the disassembly of the upper cone housing and the lower cone housing of a first embodiment of the reduction mechanism of the sample preparation system provided by the present invention;

FIGS. 11 and 12 are schematic structural views showing a second embodiment of the division mechanism of the sample preparation system according to the present invention;

FIG. 13 is a schematic view showing a connection structure between a lower cone housing and an adjustment cone plate of a second embodiment of the division mechanism of the sample preparation system according to the present invention;

FIG. 14 is a schematic view of the structure of an adjustment cone plate of a second embodiment of the reduction mechanism of the sample preparation system according to the present invention;

fig. 15 to 17 are schematic structural diagrams illustrating a plastic bag conveying and marking mechanism of the sample preparation system provided by the present invention;

fig. 18 is a schematic structural view of a plastic bag holding and conveying mechanism of the sample preparation system provided by the present invention;

fig. 19 to 21 are schematic structural diagrams illustrating a plastic bag sealing mechanism of the sample preparation system according to the present invention;

FIG. 22 shows a schematic flow diagram of a sample in a sample preparation system provided by the present invention.

Description of reference numerals: 1-grinding mechanism, 101-static grinding disc, 102-movable grinding disc, 103-grinding cavity, 104-main shaft, 105-first driving motor, 106-sliding table, 107-first adjusting motor, 108-bottom plate, 109-guide rail, 110-first fixing plate, 111-vertical plate, 112-grinding feed inlet, 113-air blowing port, 114-coupler, 115-self-aligning bearing, 116-needle bearing, 117-grinding discharge port, 118-limiting connecting column, 119-feed hopper and 120-air suction port; 2-screening and weighing mechanism, 201-shell, 202-multilayer screen, 203-screening feed inlet, 204-guide plate, 205-main plate, 206-auxiliary plate, 207-weighing collecting barrel, 208-screening feed back port, 209-quick hold-down device, 210-spring, 211-vibration motor, 212-screening frame, 213-screening discharge port; 3-division mechanism, 301-lower cone shell, 302 a-upper cone shell, 303 a-adjusting cone plate, 304 a-discharging adjusting port, 305-lower cone discharging port, 306-discharging pipe, 307-second driving motor, 308 a-second adjusting motor, 309-division returning port, 310-division feeding port, 311-division discharging port, 312-hasp, 313-arc rack, 314-first gear and 315-strip groove; 4-plastic package bag conveying and marking mechanism, 401-conveying mechanism, 402-plastic package bag box, 403-code spraying device, 404-limiting clamp, 405-connecting rod, 406-conveying wheel, 407-tooth-shaped conveying wheel, 408-conveying belt group and 409-spring; 5-plastic bag clamping and conveying mechanism, 501-turntable, 502-rotating shaft, 503-large mechanical clamp, 504-large mechanical arm, 505-small mechanical clamp and 506-small mechanical arm; 6-plastic package bag sealing mechanism, 601-rack, 602-linear bearing, 603-pinch roller, 604-second gear, 605-sensor, 606-second fixed plate, 607-motor; 7-a waste material recycling bin; 8-a sample collection tank; 9-plastic bag, 9 a-open plastic bag.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention are described in detail below with reference to the accompanying drawings:

in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

Fig. 1 to 3 are schematic views showing the structure of a sample preparation system provided by the present invention, and fig. 22 is a schematic view showing the flow direction of a sample in the sample preparation system provided by the present invention. The sample preparation system comprises a grinding mechanism 1, a screening and weighing mechanism 2 and a division mechanism 3. The grinding mechanism 1 is used for grinding a sample to be processed. The screening and weighing mechanism 2 is used for screening qualified samples and weighing, and unqualified samples are returned to the grinding mechanism 1. The division mechanism 3 is used for dividing acceptable samples according to a set division ratio. The grinding mechanism 1 is provided with a grinding feed inlet, a feed hopper 119 is arranged at the grinding feed inlet, and a cyclone separator can be arranged in the feed hopper 119. Screening and weighing machine constructs 2 screening feed inlet and grinding mechanism 1's grinding discharge gate intercommunication, and screening and weighing machine constructs 2 and still sets up the screening feed back, and screening feed back and grinding feed inlet intercommunication, unqualified sample returns through the screening feed back and grinds the mechanism after the screening. Screening and weighing mechanism 2's screening discharge gate and division mechanism 3's division feed inlet intercommunication, division mechanism 3 still sets up division feed back mouth, and division feed back mouth and screening feed back mouth intercommunication, the sample that does not divide the processing fall into division feed back mouth and flow back to screening feed back mouth and return grinding mechanism 1. The screening feed back mouth still communicates with abandon material recycling bin 7, abandons material recycling bin 7 and sets up the induction port. After the sample preparation system finishes working, the air suction port of the waste material recycling bin 7 is opened, and all waste materials are sucked into the waste material recycling bin 7 through the screening material return port for recycling. Then, the sample preparation system enters a purging program, each air blowing port and each air suction port are opened simultaneously to work to form turbulent flow, and residual samples are blown and sucked away by a dust suction device. The air blowing port and the air suction port can also be simultaneously arranged in the grinding cavity, the screening and weighing mechanism and the division mechanism of the grinding mechanism.

The sample preparation system further comprises a plastic package conveying and marking mechanism 4, a plastic package clamping and transmitting mechanism 5 and a plastic package sealing mechanism 6. The plastic packaging bag conveying and marking mechanism 4 is used for spraying required information on the plastic packaging bag 9 and conveying the information to a specified position. The plastic packaging bag clamping and conveying mechanism 5 is used for clamping the plastic packaging bag 9 subjected to spraying from the designated position to the division discharge port of the division mechanism 3 for loading. The plastic bag sealing mechanism 6 is used for sealing the plastic bag 9 after charging, and then the plastic bag clamping and transmitting mechanism 5 loosens the sealed plastic bag 9 and drops the sealed plastic bag into the sample collecting tank 8.

Fig. 4 and 5 are schematic structural diagrams illustrating a grinding mechanism of a sample preparation system provided by the invention. The grinding mechanism 1 comprises a static grinding disc 101, a movable grinding disc 102 and a grinding cavity 103 formed between the static grinding disc 101 and the movable grinding disc 102. Specifically, the static grinding disc 101 and the movable grinding disc 102 form a recess from the periphery to the center, and the recesses of the static grinding disc 101 and the movable grinding disc 102 are oppositely arranged, that is, the grinding cavity 103 is shaped like a shell, the middle gap is large, the peripheral gap of the circumference is small, and the middle gap can store a sample to be ground. The first driving motor 105 is connected to the movable grinding disc 102 through the main shaft 104, that is, the first driving motor 105 controls the movable grinding disc 102 to rotate through the main shaft 104, so as to grind the sample between the static grinding disc 101 and the movable grinding disc 102. Specifically, the static grinding disc 101 is fixed to the first fixing plate 110, and the first fixing plate 110 is fixed to the vertical plate 111 by the connecting limiting column 118. The static grinding disc 101 and the moving grinding disc 102, the first fixed plate 110 and the vertical plate 111 are parallel and opposite. The main shaft 104 penetrates through the vertical plate 111 through a needle bearing 116, and one end of the main shaft is connected with the movable grinding disc 102, and the other end of the main shaft is connected with the output end of the driving motor 105 through a coupling 114. The first driving motor 105 is arranged on the sliding table 106, and the first adjusting motor 107 controls the sliding table 106 to drive the movable grinding disc 102 to move along a guide rail 109 perpendicular to the movable grinding disc 102, so as to adjust the size of the gap between the static grinding disc 101 and the movable grinding disc 102, and samples with different particle sizes can be obtained by grinding. Specifically, the guide rail 109 is disposed on the bottom plate 108, the bottom plate 108 is vertically and fixedly connected to the vertical plate 111, the sliding table 106 is slidably disposed on the guide rail 109, and the main shaft 104 is disposed on the sliding table 106 through the self-aligning bearing 115, so as to compensate for small errors of the first driving motor 105 and the main shaft 104. The first adjustment motor 107 drives the sliding table 106 to move on the guide rail 109 through the lead screw, and drives the first drive motor 105, the main shaft 104, the self-aligning bearing 115 and the movable grinding disc 102 to move relative to the needle roller bearing 116.

The grinding cavity 103 is communicated with a grinding feed port 112 and a grinding discharge port 117 of the grinding mechanism, an air blowing port 113 is arranged above the grinding cavity, and an air suction port 120 is arranged at the grinding feed port 112 or the grinding feed port is simultaneously used as the air suction port. Specifically, the grinding feed port 112 is provided with a feed hopper 119, a cyclone separator is arranged in the feed hopper 119, and a suction port 120 is arranged above the feed hopper 119.

Fig. 6 and 7 show schematic structural diagrams of the screening and weighing mechanism of the sample preparation system provided by the invention. The screening and weighing mechanism 2 includes a housing 201, multiple layers of screens 202, a deflector 204, a screening feed inlet 203, a weigh bin 207, and a screening feed back 208. The housing 201 is disposed on the sieving frame 212 by a spring 210, and a vibration motor 211 is disposed outside the housing 201. The multi-layer screen 202 is installed at the upper part in the shell 201 through a quick-pressing device 209, a screening feed opening 203 is arranged above one side of the multi-layer screen 202, and the multi-layer screen 202 inclines towards the other side. After the sample falls into the multi-layered screen 202, a portion falls from the upper screen to the lower screen due to vibration, and another portion gradually moves toward the other side of the multi-layered screen 202. A guide plate 204 is arranged below the other side of the multilayer screen 202, a screening feed back hole 208 is arranged below the guide plate 204, the screening feed back hole 208 is communicated with the grinding feed inlet 112 of the grinding mechanism 1, a weighing and collecting barrel 207 is arranged below the multilayer screen 202, and a screening feed outlet 213 is arranged at the bottom of the weighing and collecting barrel 207. The sieving feed back port 208 is positioned below the weighing and collecting barrel 207, and samples which do not accurately fall into the weighing and collecting barrel 207 can fall into the sieving feed back port 208 to continue the next process. The screening feed inlet 203 can be used as an air blowing port, the screening feed back port 208 can be used as an air suction port, air blowing is provided by an air compressor, air suction is provided by a dust collector, blowing and dust collection operation can be automatically carried out, and excess material collection and automatic cleaning in the shell are realized.

The baffle 204 includes a main plate 205 rotating around one end as a center of a circle, and a sub-plate 206 disposed at the other end of the main plate 205. The main plate 205 is at an acute angle to the secondary plate 206, the main plate 205 pointing to the sifting return 208 and the secondary plate 206 pointing to the weigh bin 207. The mesh openings of each screen in the multi-layer screen 202 are gradually reduced from top to bottom. The deflector 204 is rotated to the side of one of the screens 202 in the plurality of screens depending on the desired sample diameter. The sample passing through the screen is qualified, and a part of the qualified sample moves to the auxiliary plate 206 in an inclined direction on the next screen, and the auxiliary plate 206 guides the part of the qualified sample to the weighing and collecting barrel 207; the other part passes through the next screen and directly falls into the weighing and collecting barrel 207, or moves to the auxiliary plate 206 in an inclined direction on the next screen, and the qualified sample is guided to the weighing and collecting barrel 207, and the like. The sample that does not pass through the screen is a reject sample, which is moved in an inclined direction on the screen of the layer to the main plate 205, and the main plate 205 guides the reject sample to the sifting feed-back opening 208.

FIGS. 8, 9, 10, 11, 12, 13 and 14 are schematic structural diagrams illustrating the division mechanism of the sample preparation system provided by the present invention. The dividing mechanism 3 comprises an upper cone shell 302, a lower cone shell 301, an adjusting cone plate 303 and a material spreading pipe 306. The bottom surface of the upper cone shell 302 is opposite to the bottom surface of the lower cone shell 301 and is arranged in a sealing manner, and the adjusting cone plate 303 is arranged in the lower cone shell 301 and can rotate relative to the lower cone shell 301. The material scattering pipe 306 is communicated with the division feeding hole 310 of the division mechanism 3 and rotates, specifically, one end of the material scattering pipe 306 is used as a rotation circle center, the other end of the material scattering pipe points to the circumference of the lower cone discharging hole 305, the second driving motor 307 controls the material scattering pipe 306 to rotate, and a sample slides to the circumference of the lower cone discharging hole 305 from the division feeding hole 310 through the rotating material scattering pipe 306. The adjusting conical plate 303 is provided with a discharging adjusting opening 304, the lower conical discharging opening 305 corresponding to the discharging adjusting opening 304 is arranged on the lower conical shell 301, and the adjusting conical plate 303 rotates to enable the discharging adjusting opening 304 and the lower conical discharging opening 305 to form an opening with variable size in a staggered mode, so that the discharging amount of the division discharging opening 311 is changed, namely the opening can be understood as the division discharging opening. The bottom of the lower cone shell 301 is provided with a division return port 309, the division return port 309 is communicated with the screening return port 208, and a sample which does not participate in division flows back to the grinding mechanism 1 from the division return port 309 through the screening return port 208. The division feed inlet 310 can be used as an air blowing port, the division feed back port 309 can be used as an air suction port, air blowing is provided by an air compressor, air suction is provided by a dust collector, blowing and dust collection operation can be automatically carried out, and excess material collection and automatic cleaning are realized. The division mechanism 3 can be provided with a plurality of discharge adjusting ports and a plurality of lower cone discharge ports corresponding to the discharge adjusting ports so as to form simultaneous discharge of the plurality of division discharge ports.

As shown in fig. 8, 9 and 10, the adjusting cone plate 303 can rotate relative to the lower cone shell 301. The upper cone housing 302 rotates relative to the lower cone housing 301, and the bottom surface of the upper cone housing 302 opposes and contacts the seal with the bottom surface of the lower cone housing 301. The adjusting cone plate 303 is connected with the lower end of the upper cone shell 302. Specifically, the second adjustment motor 308 controls the upper cone shell 302 to rotate around the height of the cone, and the upper cone shell 302 rotates to drive the adjustment cone plate 303 to rotate. The rotation of the adjusting cone plate 303 can make the discharging adjusting port 304 and the lower cone discharging port 305 form an opening with variable size in a staggered manner, so that the discharging amount of the division discharging port 311 is changed.

As shown in fig. 11, 12, 13 and 14, the adjusting conical plate 303a can rotate relative to the lower cone shell 301, option two. In contrast to the first embodiment, the bottom surface of the upper cone housing 302a is opposite to the bottom surface of the lower cone housing 301 and is fixedly and sealingly connected with the snap 312, and the upper cone housing 302a is stationary relative to the lower cone housing 301. The outer side surface of the upper end of the adjusting conical plate 303a is provided with an arc-shaped rack 313, a strip-shaped groove 315 is formed in the corresponding position of the lower conical shell 301, the arc-shaped rack 313 penetrates through the strip-shaped groove 315 to be meshed with the first gear 314, the first gear 314 is connected to the output end of the second adjusting motor 308a, the second adjusting motor 308a controls the first gear 314 to rotate, the adjusting conical plate 303a is driven to rotate, so that the discharging adjusting port 304a and the lower conical discharging port 305 are staggered to form an opening with variable size, and the discharging amount of the reduction discharging port 311 is changed.

A sample mixing barrel (not shown in the figure) is arranged between the screening and weighing mechanism and the division mechanism, or a stirrer (not shown in the figure) is arranged in the weighing and collecting barrel, and samples before entering the division mechanism are uniformly mixed and stirred to ensure the uniformity of the samples.

Fig. 15 to 17 are schematic structural diagrams illustrating a plastic bag conveying and marking mechanism of the sample preparation system provided by the present invention. The plastic package bag conveying and marking mechanism 4 comprises a conveying mechanism 401, a plastic package bag box 402 arranged at one end of the conveying mechanism 401, a code spraying device 403 arranged above the plastic package bag box 402, and a limiting clamp 404 arranged below the other end of the conveying mechanism 401. The plastic package bag 9 is drawn out from the plastic package bag box 402 and moves, meanwhile, the roller of the code spraying device 403 is driven to rotate, required information is sprayed on the plastic package bag 9, and the plastic package bag 9 is conveyed into the limiting clamp 404 through the conveying mechanism 401. The conveying mechanism 401 sequentially comprises a conveying wheel 406 for drawing out the plastic package bag 9 and conveying the plastic package bag to the subsequent conveying, a tooth-shaped conveying wheel 407 for matching with the conveying wheel 406 to convey, and a conveying belt group 408 for conveying the plastic package bag 9 to the limiting clamp 404 from front to back. Specifically, a plurality of plastic bags are stacked in a plastic bag box 402, and a spring 409 is arranged below one end of the plastic bag box 402 close to the conveying mechanism 401. When the plastic bag packaging machine starts to work, the transmission wheel 406 rotates, the spring 409 is released to lift one end of the plastic bag box 402, and the transmission wheel 406 contacts the plastic bag 9 placed on the uppermost layer in the plastic bag box 402. Since the friction between the transfer wheel 406 and the plastic bags is greater than the friction between two plastic bags, when the transfer wheel 406 rotates, the plastic bag on the uppermost layer is brought into the transfer mechanism and the plastic bag on the next layer is not moved in place. Meanwhile, the code sprayer 403 sprays the surface of the plastic package bag. After the plastic bags are conveyed to the conveyor belt group 408, the conveyor wheel 406 stops rotating, and the plastic bags are pushed forward by the conveyor belt group 408 to fall into the limiting clamp 404. The retaining clip 404 is a U-shaped member with two ends extending outward to facilitate the plastic bag to drop into the clip accurately.

Fig. 18 shows a schematic structural diagram of a plastic bag clamping and conveying mechanism of the sample preparation system provided by the invention. The plastic packaging bag clamping and transmitting mechanism 5 is arranged below the dividing mechanism 3 and comprises a turntable 501 coaxial with the dividing mechanism 3. Specifically, the rotary disc 501 can rotate around the rotating shaft 502, and the central axis of the rotating shaft 502 coincides with the height of the cone of the lower cone shell 301, that is, the rotary disc 501 rotates below the lower cone shell 301. The turntable 501 is provided with a large mechanical clamp 503 along the circumferential direction thereof, and the large mechanical clamp 503 can be opened and closed along the tangential direction of the turntable 501. Specifically, the large mechanical clamp 503 is U-shaped, and includes a pair of large mechanical arms 504 symmetrically arranged, and the pair of large mechanical arms 504 form a U-shaped large mechanical clamp with a variable opening. The outer ends of the pair of large mechanical arms 504 are oppositely provided with a pair of small mechanical clamps 505 for clamping two ends of the plastic package bag after spraying. Specifically, a small mechanical clamp 505 is respectively arranged on the outer ends of the two large mechanical arms 504 in the opening of the U-shaped large mechanical clamp, and the two small mechanical clamps 505 are oppositely arranged and respectively clamp two ends of the plastic packaging bag. A small mechanical clamp 505 comprises two symmetrically arranged small mechanical arms 506 which are controlled to open and close by another motor, and the opening and closing directions of the small mechanical clamp 505 are perpendicular to the opening and closing direction of the large mechanical clamp 503. The two small mechanical clamps are used for clamping two sides of the plastic package bag, and the pair of large mechanical arms of the large mechanical clamp draw close inwards to control the opening of the plastic package bag to open and form a state of the plastic package bag 9 a. When the plastic package bag conveying and marking mechanism 4 starts to work, the turntable 501 rotates to transmit the large mechanical clamp and the small mechanical clamp to the preset positions, namely above the limiting clamp 404, and waits for the plastic package bag to fall into the small mechanical clamp through the conveying belt group. After the lower end of the plastic package bag is limited by the limiting clamp 404, the small mechanical clamp clamps two ends of the plastic package bag, the rotary disc 501 continues to rotate, the plastic package bag is conveyed to the division discharge port to wait for discharging and bagging, and the rotary disc continues to rotate after bagging, so that the next procedure is carried out. The spindle 502 is controlled by a stepper motor to ensure accurate positioning of the large and small mechanical clamps. The two motors respectively control the opening and closing of the large mechanical clamp and the small mechanical clamp.

The turntable 501 of the plastic bag clamping and transmitting mechanism 5 can be provided with a plurality of large mechanical clamps 503 along the circumferential direction, and the number and the adjacent position relation of the large mechanical clamps correspond to the number and the position of the division discharge holes arranged on the division mechanism 3.

Fig. 19 to 21 are schematic structural diagrams illustrating a plastic bag sealing mechanism of the sample preparation system according to the present invention. The plastic bag sealing mechanism 6 is arranged on the transmission track of the plastic bag clamping and transmitting mechanism 5 through a second fixing plate 606, and the plastic bag clamping and transmitting mechanism 5 transmits the plastic bags 9a to the contraction and separation discharge port for charging, and then transmits the plastic bags to the plastic bag sealing mechanism 6 for sealing. The plastic bag sealing mechanism 6 comprises a rack 601, a linear bearing 602 which moves linearly along the rack 601, and a pair of pressing wheels 603 arranged on the linear bearing 602, wherein when the plastic bag after being charged reaches the plastic bag sealing mechanism 6, the linear bearing 602 drives the pressing wheels 603 along the rack 601 to seal the plastic bag. Specifically, the motor 607 controls the linear bearing 602 on the rack 601 to drive the pair of pressing wheels 603 to move and rotate relatively through the second gear 604 on the rack 601, the sensors 605 are arranged at both ends of the rack 601, when the plastic package bag arrives, the motor starts to work, the pressing wheels seal the plastic package bag, and after the pressing wheels pass through, the motor stops working.

The above examples are only for illustrating the technical solutions of the present invention, and are not intended to limit the scope of the present invention. But all equivalent changes and modifications within the scope of the present invention should be considered as falling within the scope of the present invention.

Claims

1. A sample preparation system, the system comprising:

the grinding mechanism (1) is used for grinding a sample to be processed;

the screening and weighing mechanism (2) is communicated with the grinding discharge port (117) of the grinding mechanism (1) through a screening feed port (203) and is used for screening qualified samples and weighing the qualified samples, and unqualified samples are returned to the grinding mechanism (1); and

the division mechanism (3) is used for carrying out division processing on the qualified sample according to a set division proportion;

characterized in that, the system also includes:

the plastic packaging bag conveying and marking mechanism (4) is used for spraying required information on the plastic packaging bag (9) and conveying the information to a specified position;

the plastic packaging bag clamping and conveying mechanism (5) is used for clamping the sprayed plastic packaging bag (9) from the specified position to a division discharge hole (311) of the division mechanism (3) for loading; and

and the plastic package bag sealing mechanism (6) is used for sealing the plastic package bag (9) after being charged.

2. A sample preparation system as claimed in claim 1, wherein the grinding mechanism comprises:

a static grinding disc (101),

a moving grinding disc (102), and

a grinding cavity (103) formed between the static grinding disc (101) and the movable grinding disc (102);

a first driving motor (105) controls the movable grinding disc (102) to rotate through a main shaft (104); the first driving motor (105) is arranged on the sliding table (106), and the first adjusting motor (107) controls the sliding table (106) to drive the movable grinding disc (102) to move along a guide rail (109) which is perpendicular to the movable grinding disc (102).

3. A sample preparation system as claimed in claim 2, wherein said grinding chamber (103) is in communication with a grinding feed inlet (112) and said grinding discharge outlet (117) of said grinding means (1), a gas blowing port (113) is provided above said grinding chamber (103), and a suction port (120) is provided at said grinding feed inlet (112).

4. A sample preparation system according to claim 1, wherein said sieving and weighing means (2) comprises:

a shell (201),

a multi-layered screen (202) disposed within the housing (201),

the screening feed inlet (203) disposed above one side of the multi-layered screen (202),

a baffle (204) disposed below the other side of the multi-layered screen (202),

a weigh collection bucket (207) disposed below the multi-layered screen (202), an

A screening feed back port (208) arranged below the guide plate (204);

and the screening feed back port (208) is communicated with the grinding feed inlet (112) of the grinding mechanism (1).

5. A sample preparation system according to claim 4, wherein the flow guide (204) comprises:

a main plate (205) rotating with one end as a center, an

A sub-board (206) provided at the other end of the main board (205);

according to set requirements, the flow guide plate (204) rotates to the side edge of one screen of the multiple layers of screens (202), the auxiliary plate (206) guides the qualified sample to the weighing and collecting barrel (207), and the main plate (205) guides the unqualified sample to the screening and returning port (208).

6. A sample preparation system according to claim 1, wherein said fractionating mechanism (3) comprises:

an upper cone shell (302),

a lower cone shell (301) whose bottom surface is arranged opposite to the bottom surface of the upper cone shell (302),

an adjustment cone plate (303) disposed within the lower cone shell (301) and rotating relative to the lower cone shell (301), an

The material spreading pipe (306) is communicated with a division feeding hole (310) of the division mechanism (3) and rotates;

the adjusting conical plate (303) is provided with a discharging adjusting opening (304), and the lower conical shell (301) is provided with a lower conical discharging opening (305) corresponding to the discharging adjusting opening (304).

7. The sample preparation system of claim 1, wherein the plastic bag transfer marking mechanism comprises:

a transfer mechanism (401) for transferring the object,

a plastic bag box (402) arranged at one end of the conveying mechanism (401),

a code sprayer (403) arranged above the plastic packaging bag box (402), an

And the limiting clamp (404) is arranged below the other end of the conveying mechanism (401).

8. A sample preparation system according to claim 1, wherein said plastic bag holding and transporting means (5) is arranged below said dividing means (3) and comprises:

a turntable (501) coaxial with the dividing mechanism (3),

the rotary disc (501) is externally provided with a large mechanical clamp (503) which is opened and closed along the tangential direction of the rotary disc (501) along the circumferential direction of the rotary disc, and the outer ends of a pair of large mechanical arms (504) of the large mechanical clamp (503) are oppositely provided with a pair of small mechanical clamps (505) which are used for clamping the plastic package bag (9) after spraying.

9. A sample preparation system as claimed in claim 1, wherein said plastic bag sealing mechanism (6) is disposed on a transmission track of said plastic bag holding and transmitting mechanism (5), and comprises:

a rack (601) which is provided with a plurality of teeth,

a linear bearing (602) linearly moving along the rack (601), and

a pair of pinch rollers (603) disposed on the linear bearing (602).