CN114088896B - Detection device and detection method for heavy metals in agricultural products - Google Patents
Detection device and detection method for heavy metals in agricultural products Download PDFInfo
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- CN114088896B CN114088896B CN202210068449.6A CN202210068449A CN114088896B CN 114088896 B CN114088896 B CN 114088896B CN 202210068449 A CN202210068449 A CN 202210068449A CN 114088896 B CN114088896 B CN 114088896B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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Abstract
The invention discloses a device and a method for detecting heavy metals in agricultural products, relates to the technical field of heavy metal detection, and solves the problems that in the prior art, different agricultural products are different in juice amount after being crushed, when the juice after being crushed is detected, the added reagent is not quantified, and the added reagent cannot be added in proportion to the juice amount of the agricultural products under the condition that the quantitative metering is not carried out and the juice amount of the agricultural products is unknown. According to the device and the method for detecting the heavy metal in the agricultural product, the gear assembly drives the first rack and the second rack to move up and down, the first piston is controlled to quantitatively take liquid, the second piston is controlled to release the reagent in proportion, multiple sampling tests can be realized, the improper reagent feeding proportion is avoided, and the detection precision is improved; during the sample, agricultural product juice and reagent are at first mixed at the notch of arc stopper, flow to in detecting a section of thick bamboo again, improve reagent and mix the effect, convenient operation.
Description
Technical Field
The invention relates to the technical field of heavy metal detection, in particular to a device and a method for detecting heavy metal in agricultural products.
Background
Mode that agricultural product heavy metal detection commonly used is mostly drawing the agricultural product sample and stirs up, then toward wherein adding detect reagent, and the reaction is compared with the color comparison card after accomplishing, and whole process needs manpower manual operation, but specific detect reagent has corrosivity or other harm, can bring harm to the inspection personnel.
Chinese patent CN215263144U discloses an agricultural product heavy metal detection equipment, including detecting platform and color comparison carousel, the bottom mounting that detects the platform is provided with the support column, detect the first mount of top fixedly connected with of platform, the top of first mount is rotated and is connected with driving motor, driving motor's bottom is rotated and is connected with the transmission shaft, the bottom fixedly connected with hydraulic pressure cover of transmission shaft, the bottom of hydraulic pressure cover is rotated and is connected the stirring leaf, one side fixedly connected with second mount of first mount, the bottom mounting of second mount is provided with a reagent section of thick bamboo. The utility model discloses a through the setting of color comparison carousel, can become certain colour after the metallic substance in the agricultural product reacts with reagent production, through contrast color comparison carousel, can discern what kind of heavy metal this material is, through the setting of examining the test table, the mesa sets to the anticorrosion material and can prolong the life who examines the test table, has improved check out test set's practicality.
Chinese patent CN214668611U discloses an agricultural product heavy metal detection device, the power distribution box comprises a box body, separate into through the baffle in the box and smash chamber, stock solution chamber and detection chamber, smash the chamber and set up side by side with the stock solution chamber with the detection chamber, the stock solution chamber sets up with detecting the chamber side by side, and the stock solution chamber is located and detects directly over the chamber, the lateral wall is provided with feed inlet and the fluid infusion mouth with crushing chamber and stock solution chamber intercommunication respectively on the box, be provided with corresponding first fender material stopper and second fender material stopper in feed inlet and the fluid infusion mouth respectively, the fixed driving motor that is provided with of lateral wall on the first fender material stopper, the driving motor output shaft runs through first fender material stopper fixedly connected with puddler downwards, and first fender material stopper is provided with the bearing that matches with driving motor output shaft junction. The utility model discloses a compact structure can carry the scene to detect the heavy metal in the agricultural product, detects whole staff and can not contact with acid solution and detect reagent.
Although the application solves the problems in the background art to some extent, the following problems exist in the application: 1. the juice amount generated after different agricultural products are crushed is different, and quantitative measurement is not carried out when the juice generated after the agricultural products are crushed is detected; 2. under the condition that the quantity of the juice of the agricultural products is unknown, the added reagent is not quantitative, and cannot be added in proportion to the quantity of the juice of the agricultural products, so that errors are generated on the detection result.
Disclosure of Invention
The invention aims to provide a device and a method for detecting heavy metals in agricultural products, wherein the device is provided with a crushing device for crushing the agricultural products, a crushing barrel is meshed with a driving assembly, an extrusion rod penetrates through the inside of the crushing barrel, the driving assembly drives the crushing barrel to rotate, the extrusion rod is driven to intermittently move downwards while the agricultural products are crushed, and an extrusion plate extrudes the crushed agricultural products to accelerate residue and juice separation; the gear assembly drives the first rack and the second rack to move up and down, the first piston is controlled to quantitatively take liquid, the second piston is controlled to release a reagent in proportion, multiple sampling tests can be realized, the reagent is prevented from being put in an improper proportion, and the detection precision is improved; detect a section of thick bamboo and be close to the inside of backup pad one end and be provided with the sealing plug, during the sample, agricultural product juice and reagent mix at the notch of arc stopper earlier, flow to again in detecting a section of thick bamboo, improve reagent and mix the effect, do not need the people to rock mixed reagent again, go up the hand easily, convenient operation to solve the problem of proposing in the above-mentioned background art.
In order to achieve the purpose, the invention provides the following technical scheme: a heavy metal detection device in agricultural products comprises a device bracket, a crushing device and a detection barrel, wherein one end of the device bracket is fixedly connected with the crushing device, one side of the device bracket is provided with a supporting plate, the upper end of the supporting plate is fixedly connected with a limiting plate, a sampling assembly is movably connected on the limiting plate, the device bracket below the limiting plate is connected with the detection barrel,
a juice cylinder and a reagent cylinder are arranged outside one end of the detection cylinder close to the supporting plate, the lower end of the juice cylinder is fixedly connected with the lower end of the crushing device through a pipeline, a sealing plug is arranged inside one end of the detection cylinder close to the supporting plate,
the sampling assembly comprises a gear assembly, a first rack and a second rack, the gear assembly is movably connected with the limiting plate through a bearing, the two sides of the gear assembly are respectively provided with the first rack and the second rack, the first rack and the second rack are respectively clamped and connected with the limiting plate, the lower end of the first rack is fixedly connected with a first piston, the first piston is movably connected with the juice cylinder, the second rack is movably connected with a second piston, the second piston is movably connected with the reagent cylinder,
the upper end of the crushing device is provided with a cover body, the upper surface of the cover body is provided with a driving assembly, the center of the cover body is movably connected with a crushing barrel through a bearing, the crushing barrel is meshed with the driving assembly, and the inside of the crushing barrel is connected with an extrusion rod in a penetrating way.
Preferably, the position of the limiting plate close to the second rack is provided with symmetrically distributed electromagnets.
Preferably, one end of the detection cylinder, which is far away from the sealing plug, is provided with a liquid discharge port, an observation port is arranged at a position of the detection cylinder, which is close to the liquid discharge port, and one side of the observation port is provided with a colorimetric rotary drum.
Preferably, the sealing plug comprises a rotating disk, a connecting shaft, a mounting plate and an arc-shaped plug, the center of the rotating disk is fixedly connected with the connecting shaft, the connecting shaft penetrates through the end of the detection cylinder, the connecting shaft is arranged in the mounting plate fixedly connected with the inner end of the detection cylinder, and one end, far away from the connecting shaft, of the mounting plate is fixedly connected with the arc-shaped plug.
Preferably, the lower extreme of a juice section of thick bamboo and a reagent section of thick bamboo all is provided with the stand pipe, the lower extreme and the detection section of thick bamboo fixed connection of stand pipe, and the lower extreme of stand pipe draws close the setting, all is provided with the graduation apparatus on the outer wall of a juice section of thick bamboo and a reagent section of thick bamboo.
Preferably, the gear assembly comprises a driving gear, a speed regulating gear and a gear motor, the output end of the gear motor is connected with the driving gear, the driving gear is respectively meshed with the speed regulating gear and the second rack, and the speed regulating gear is meshed with the first rack.
Preferably, the movable groove has been seted up to the inside of second rack, the spacing groove has been seted up of equidistance on the lateral wall of movable groove, and the limiting groove is provided with iron plate, and the upper end and the limiting groove hinge of iron plate are connected, and the lower extreme of iron plate runs through the spacing groove, and the one end fixedly connected with supporting spring that the iron plate lower extreme is close to the spacing groove, supporting spring's one end and limiting groove fixed connection, movable groove and second piston swing joint, and the one end that the movable inslot portion was arranged in to the second piston is provided with spacing roof.
Preferably, drive assembly includes driving motor, drive gear and movable rod, and driving motor's output runs through drive gear's center to with the one end fixed connection of movable rod, drive gear and the upper end meshing of crushing barrel, the upper end of crushing barrel be provided with drive gear assorted control gear, be connected with the crushing sword of dislocation distribution on the outer wall of crushing barrel.
Preferably, the upper end of the extrusion rod is provided with an inclined block, the inclined block is positioned on a movable path of the movable rod, the lower end of the inclined block is provided with a return spring, the lower end of the return spring is abutted against the driving gear, the lower end of the extrusion rod is provided with an extrusion plate, and a filter screen is arranged in the crushing device below the extrusion plate.
The invention provides a detection method of a device for detecting heavy metals in agricultural products, which comprises the following steps:
s1: the agricultural products to be detected are put into the crushing device, the driving assembly drives the crushing barrel to rotate, the agricultural products are crushed, when the movable rod rotates, the movable rod can intermittently strike the inclined block, the reset spring is shortened, the extrusion rod sinks, the extrusion plate extrudes the crushed agricultural products, the separation of residues and juice is accelerated, and the juice of the agricultural products is collected below the filter screen;
s2: the gear assembly drives the second rack and the first rack to move upwards at the same time, the first piston moves upwards under the driving of the first rack, negative pressure is generated in the juice cylinder, juice of agricultural products is sucked into the juice cylinder through a pipeline, and the position of the second piston does not move upwards along with the second rack;
s3: when enough agricultural product juice is sucked into the juice cylinder, the sealing plug is rotated, the notch of the arc-shaped plug faces upwards, and the gear assembly rotates reversely;
s4: the second rack and the first rack move downwards simultaneously, the first piston and the second piston respectively apply pressure to the juice cylinder and the detection cylinder to squeeze the agricultural product juice and the reagent into the detection cylinder, and the agricultural product juice and the reagent are mixed in the notch of the arc plug and then flow into the detection cylinder;
s5: the agricultural product juice after having mixed the reagent flows to viewing aperture department in detecting a section of thick bamboo automatically, carries out the color through viewing aperture and color comparison rotary drum.
Compared with the prior art, the invention has the beneficial effects that: 1. the invention provides a device and a method for detecting heavy metals in agricultural products, wherein the device is provided with a crushing device for crushing the agricultural products, a crushing barrel is meshed with a driving assembly, an extrusion rod penetrates through the inside of the crushing barrel, the driving assembly drives the crushing barrel to rotate, the extrusion rod is driven to intermittently move downwards while the agricultural products are crushed, and an extrusion plate extrudes the crushed agricultural products to accelerate residue and juice separation;
2. according to the device and the method for detecting the heavy metal in the agricultural product, the gear assembly drives the first rack and the second rack to move up and down, the first piston is controlled to quantitatively take liquid, the second piston is controlled to release the reagent in proportion, multiple sampling tests can be realized, the improper reagent feeding proportion is avoided, and the detection precision is improved;
3. according to the device and the method for detecting the heavy metal in the agricultural product, the sealing plug is arranged in the detection cylinder close to one end of the supporting plate, when sampling is conducted, the agricultural product juice and the reagent are mixed in the notch of the arc-shaped plug firstly and then flow into the detection cylinder, the reagent mixing effect is improved, manual shaking for mixing the reagent is not needed, the operation is easy, and the operation is convenient.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a view showing an internal structure of the crushing apparatus according to the present invention;
FIG. 3 is a view of the crushing cylinder and the extrusion stem of the present invention;
FIG. 4 is a view showing the construction of the cartridge mounting structure of the present invention;
fig. 5 is a view of the seal plug of the present invention;
FIG. 6 is a block diagram of a sampling assembly of the present invention;
FIG. 7 is a view showing an internal structure of a second rack gear of the present invention;
fig. 8 is a structural view of an iron plate installation of the present invention.
In the figure: 1. a device holder; 11. a support plate; 12. a limiting plate; 121. an electromagnet; 2. a crushing device; 21. a cover body; 22. a drive assembly; 221. a movable rod; 23. a milling drum; 231. a control gear; 232. a crushing knife; 24. an extrusion stem; 241. a sloping block; 242. a return spring; 243. a pressing plate; 25. a filter screen; 3. a detection cylinder; 31. a juice cartridge; 311. a guide tube; 32. a reagent cartridge; 33. a sealing plug; 331. rotating the disc; 332. a connecting shaft; 333. mounting a plate; 334. an arc-shaped plug; 34. a colorimetric drum; 4. a sampling assembly; 41. a gear assembly; 42. a first rack; 421. a first piston; 43. a second rack; 431. a second piston; 4311. a limiting top plate; 432. a movable groove; 433. an iron plate; 434. supporting the spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Please refer to fig. 1, a heavy metal detection device in agricultural product, including device support 1, reducing mechanism 2 and detection section of thick bamboo 3, the one end fixedly connected with reducing mechanism 2 of device support 1, one side of device support 1 is provided with backup pad 11, the upper end fixedly connected with limiting plate 12 of backup pad 11, swing joint has sampling component 4 on the limiting plate 12, be connected with detection section of thick bamboo 3 on the device support 1 of limiting plate 12 below, limiting plate 12 is provided with symmetric distribution's electro-magnet 121 on being close to the position of second rack 43, the upper surface of device support 1 is the inclined plane, the position height at detection section of thick bamboo 3 both ends is inequality, make detection liquid can automatic flow to observe mouthful department.
Referring to fig. 2-3, a cover 21 is disposed at an upper end of the crushing device 2, a driving assembly 22 is disposed on an upper surface of the cover 21, a crushing cylinder 23 is movably connected to a central position of the cover 21 through a bearing, the crushing cylinder 23 is engaged with the driving assembly 22, an extrusion rod 24 is penetratingly connected to an inside of the crushing cylinder 23, the driving assembly 22 includes a driving motor, a driving gear and a movable rod 221, an output end of the driving motor penetrates through a center of the driving gear and is fixedly connected to one end of the movable rod 221, the driving gear is engaged with an upper end of the crushing cylinder 23, a control gear 231 matched with the driving gear is disposed at an upper end of the crushing cylinder 23, crushing knives 232 distributed in a staggered manner are connected to an outer wall of the crushing cylinder 23, an inclined block 241 is disposed at an upper end of the extrusion rod 24, the inclined block 241 is located on a movable path of the movable rod 221, when the movable rod 221 rotates, the inclined block 241 can be intermittently hit against the inclined block 241, the lower extreme of sloping block 241 is provided with reset spring 242, and reset spring 242's lower extreme offsets with drive gear, and the lower extreme of extrusion stem 24 is provided with stripper plate 243, and when movable rod 221 struck sloping block 241, reset spring 242 shortened, and the extrusion stem 24 sinks, and stripper plate 243 extrudees the agricultural product after smashing for the separation of sediment juice, is provided with filter screen 25 in the reducing mechanism 2 of stripper plate 243 below.
Referring to fig. 4-5, a juice cylinder 31 and a reagent cylinder 32 are arranged outside one end of the detection cylinder 3 close to the support plate 11, the lower end of the juice cylinder 31 is fixedly connected with the lower end of the crushing device 2 through a pipeline, a one-way valve is arranged in the pipeline, the juice of the agricultural products cannot flow backwards during sampling, a sealing plug 33 is arranged inside one end of the detection cylinder 3 close to the support plate 11, a liquid discharge port is arranged at one end of the detection cylinder 3 far away from the sealing plug 33, an observation port is arranged at the position of the detection cylinder 3 close to the liquid discharge port, a colorimetric drum 34 is arranged at one side of the observation port, the sealing plug 33 comprises a rotating disc 331, a connecting shaft 332, a mounting plate 333 and an arc-shaped plug 334, the center position of the rotating disc 331 is fixedly connected with the connecting shaft 332, the connecting shaft 332 penetrates through the end of the detection cylinder 3, the mounting plate 333 is fixedly connected with one end of the connecting shaft 332, the mounting plate 333 far away from the connecting shaft 332 is fixedly connected with the arc-shaped plug 334, a handle is arranged on one side of the rotating disc 331, when sampling is not carried out, the handle is positioned at the highest position of the rotating disc 331, the arc-shaped plug 334 is in an arch bridge shape and used for blocking the communication position of the juice cylinder 31 and the reagent cylinder 32 with the detection cylinder 3, when sampling is carried out, the rotating disc 331 is rotated through the handle to drive the mounting plate 333 to rotate, the notch of the arc-shaped plug 334 faces upwards, the juice cylinder 31 and the reagent cylinder 32 are communicated with the detection cylinder 3, the first piston 421 and the second piston 431 respectively apply pressure to the juice cylinder 31 and the detection cylinder 3 to extrude the juice of agricultural products and the reagents into the detection cylinder 3, the juice of the agricultural products and the reagents are firstly mixed in the notch of the arc-shaped plug 334 and then flow into the detection cylinder 3, the lower ends of the juice cylinder 31 and the reagent cylinder 32 are respectively provided with a guide pipe 311, the lower end of the guide pipe 311 is fixedly connected with the detection cylinder 3, the lower end of the guide pipe 311 is arranged close to each other, when sampling is carried out, the first piston 421 and the second piston 431 respectively apply pressure to the juice cylinder 31 and the detection cylinder 3, the agricultural product juice and the reagent can be mixed in the notch of the arc-shaped plug 334, the reagent mixing effect is improved, and the outer walls of the juice barrel 31 and the reagent barrel 32 are provided with graduations.
Referring to fig. 6 to 8, the sampling assembly 4 includes a gear assembly 41, a first rack 42 and a second rack 43, the gear assembly 41 is movably connected to the limiting plate 12 through a bearing, the two sides of the gear assembly 41 are respectively provided with the first rack 42 and the second rack 43, the first rack 42 and the second rack 43 are respectively connected to the limiting plate 12 in a clamping manner, the lower end of the first rack 42 is fixedly connected to a first piston 421, the first piston 421 is movably connected to the juice cylinder 31, the second rack 43 is movably connected to a second piston 431, the second piston 431 is movably connected to the reagent cylinder 32, the gear assembly 41 includes a driving gear, a speed-adjusting gear and a gear motor, the output end of the gear motor is connected to the driving gear, the driving gear is respectively engaged to the speed-adjusting gear and the second rack 43, the gear motor operates, the driving gear and the speed-adjusting gear drive the second rack 43 and the first rack 42 to move, the second piston 431 and the first piston 421 are pressed, a movable groove 432 is formed in the second rack 43, a limit groove is formed on the side wall of the movable groove 432 at equal distance, an iron plate 433 is arranged in the limit groove, the upper end of the iron plate 433 is hinged with the limit groove, the lower end of the iron plate 433 penetrates through the limit groove, a support spring 434 is fixedly connected with one end of the lower end of the iron plate 433, which is close to the limit groove, one end of the support spring 434 is fixedly connected with the limit groove, the movable groove 432 is movably connected with the second piston 431, a limit top plate 4311 is arranged at one end of the second piston 431, which is arranged in the movable groove 432, when the second rack 43 moves downwards, the iron plate 433 extrudes the limit top plate 4311 under the control of the limit groove, so that the second rack 43 drives the second piston 431 to move downwards to add the reagent into the detection cylinder 3, when the second rack 43 moves upwards, the limit top plate 4311 extrudes the iron plate 433, the support spring 434 contracts, the iron plate 433 is arranged in the limiting groove, the second rack 43 moves upwards, the second piston 431 cannot be driven to move upwards, the piston part of the second piston 431 is enabled to be attached to the upper liquid level of the reagent, when the lower end of the second piston 431 moves to the lowest end of the reagent barrel 32, the electromagnet 121 is electrified, the iron plate 433 is made to be accommodated in the limiting groove, and the position relation between the second rack 43 and the second piston 431 is readjusted.
In order to better show the detection process of the detection device for heavy metals in agricultural products, the embodiment provides a detection method of the detection device for heavy metals in agricultural products, which includes the following steps:
the method comprises the following steps: putting the agricultural product to be detected into the crushing device 2, driving the crushing barrel 23 to rotate by the driving assembly 22, crushing the agricultural product, intermittently striking the inclined block 241 when the movable rod 221 rotates, shortening the return spring 242, sinking the extrusion rod 24, extruding the crushed agricultural product by the extrusion plate 243 to accelerate the separation of dregs and juice, and collecting the juice of the agricultural product below the filter screen 25;
step two: the gear assembly 41 drives the second rack 43 and the first rack 42 to move upwards at the same time, the first piston 421 moves upwards under the driving of the first rack 42, negative pressure is generated in the juice cylinder 31, the juice of the agricultural product is sucked into the juice cylinder 31 through a pipeline, and the position of the second piston 431 does not move upwards along with the second rack 43;
step three: after a sufficient amount of agricultural product juice is sucked into the juice barrel 31, the sealing plug 33 is rotated, the notch of the arc-shaped plug 334 faces upwards, and the gear assembly 41 rotates reversely;
step four: the second rack 43 and the first rack 42 move downwards simultaneously, the first piston 421 and the second piston 431 respectively apply pressure to the juice cylinder 31 and the detection cylinder 3, the juice of the agricultural products and the reagent are squeezed into the detection cylinder 3, the juice of the agricultural products and the reagent are firstly mixed in the notch of the arc-shaped plug 334 and then flow into the detection cylinder 3;
step five: the agricultural product juice mixed with the reagent automatically flows to the observation port in the detection cylinder 3, and the color of the agricultural product juice is compared with that of the colorimetric rotary cylinder 34 through the observation port.
In summary, the following steps: the device and the method for detecting the heavy metals in the agricultural products are provided with a crushing device 2 for crushing the agricultural products, a crushing barrel 23 is meshed with a driving assembly 22, an extrusion rod 24 penetrates through the inside of the crushing barrel 23, the driving assembly 22 drives the crushing barrel 23 to rotate, the extrusion rod 24 is driven to intermittently move downwards while the agricultural products are crushed, and an extrusion plate 243 extrudes the crushed agricultural products to accelerate residue and juice separation; the gear assembly 41 drives the first rack 42 and the second rack 43 to move up and down, the first piston 421 is controlled to quantitatively take liquid, and the second piston 431 is controlled to release the reagent in proportion, so that multiple sampling tests can be realized, the reagent is prevented from being put in an improper proportion, and the detection precision is improved; detect a section of thick bamboo 3 and be close to the inside of backup pad 11 one end and be provided with sealing plug 33, during the sample, agricultural product juice and reagent mix at the notch of arc stopper 334 earlier, flow to in detecting a section of thick bamboo 3 again, improve reagent and mix the effect, do not need the people to rock mixed reagent again, go into the hand easily, convenient operation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (9)
1. The utility model provides a heavy metal detection device in agricultural product, includes device support (1), reducing mechanism (2) and detects a section of thick bamboo (3), its characterized in that: one end of the device support (1) is fixedly connected with a crushing device (2), one side of the device support (1) is provided with a supporting plate (11), the upper end of the supporting plate (11) is fixedly connected with a limiting plate (12), the limiting plate (12) is movably connected with a sampling assembly (4), and the device support (1) below the limiting plate (12) is connected with a detection barrel (3);
a juice cylinder (31) and a reagent cylinder (32) are arranged outside one end of the detection cylinder (3) close to the support plate (11), the lower end of the juice cylinder (31) is fixedly connected with the lower end of the crushing device (2) through a pipeline, and a sealing plug (33) is arranged inside one end of the detection cylinder (3) close to the support plate (11);
the sampling assembly (4) comprises a gear assembly (41), a first rack (42) and a second rack (43), the gear assembly (41) is movably connected with the limiting plate (12) through a bearing, the two sides of the gear assembly (41) are respectively provided with the first rack (42) and the second rack (43), the first rack (42) and the second rack (43) are respectively connected with the limiting plate (12) in a clamping manner, the lower end of the first rack (42) is fixedly connected with a first piston (421), the first piston (421) is movably connected with the juice barrel (31), the second rack (43) is movably connected with a second piston (431), the second piston (431) is movably connected with the reagent barrel (32), a movable groove (432) is formed inside the second rack (43), a limiting groove is formed on the side wall of the movable groove (432) at equal distance, an iron plate (433) is arranged in the limiting groove, and the upper end of the iron plate (433) is hinged with the limiting groove, the lower end of the iron plate (433) penetrates through the limiting groove, one end, close to the limiting groove, of the lower end of the iron plate (433) is fixedly connected with a supporting spring (434), one end of the supporting spring (434) is fixedly connected with the limiting groove, the movable groove (432) is movably connected with the second piston (431), and one end, placed inside the movable groove (432), of the second piston (431) is provided with a limiting top plate (4311);
the upper end of the smashing device (2) is provided with a cover body (21), the upper surface of the cover body (21) is provided with a driving assembly (22), the center of the cover body (21) is movably connected with a smashing barrel (23) through a bearing, the smashing barrel (23) is meshed with the driving assembly (22), and an extrusion rod (24) penetrates through the inside of the smashing barrel (23).
2. The apparatus for detecting heavy metals in agricultural products of claim 1, wherein: and electromagnets (121) which are symmetrically distributed are arranged at the position, close to the second rack (43), of the limiting plate (12).
3. The apparatus for detecting heavy metals in agricultural products of claim 1, wherein: one end of the detection cylinder (3) far away from the sealing plug (33) is provided with a liquid outlet, an observation port is arranged at the position of the detection cylinder (3) close to the liquid outlet, and one side of the observation port is provided with a colorimetric rotary cylinder (34).
4. The apparatus for detecting heavy metals in agricultural products of claim 1, wherein: the sealing plug (33) comprises a rotating disc (331), a connecting shaft (332), an installing plate (333) and an arc-shaped plug (334), the center of the rotating disc (331) is fixedly connected with the connecting shaft (332), the connecting shaft (332) penetrates through the end of the detection barrel (3), the connecting shaft (332) is arranged at one end of the interior of the detection barrel (3) and fixedly connected with the installing plate (333), and one end, far away from the connecting shaft (332), of the installing plate (333) is fixedly connected with the arc-shaped plug (334).
5. The apparatus for detecting heavy metals in agricultural products of claim 4, wherein: the lower extreme of a juice section of thick bamboo (31) and a reagent section of thick bamboo (32) all is provided with stand pipe (311), the lower extreme and the detection section of thick bamboo (3) fixed connection of stand pipe (311), and the lower extreme of stand pipe (311) sets up of drawing close, all is provided with the graduation apparatus on the outer wall of a juice section of thick bamboo (31) and a reagent section of thick bamboo (32).
6. The apparatus for detecting heavy metals in agricultural products of claim 1, wherein: the gear assembly (41) comprises a driving gear, a speed regulating gear and a gear motor, the output end of the gear motor is connected with the driving gear, the driving gear is respectively meshed with the speed regulating gear and a second rack (43), and the speed regulating gear is meshed with a first rack (42).
7. The apparatus for detecting heavy metals in agricultural products of claim 1, wherein: drive assembly (22) include driving motor, drive gear and movable rod (221), and driving motor's output runs through drive gear's center to with the one end fixed connection of movable rod (221), the upper end meshing of drive gear and crushing barrel (23), the upper end of crushing barrel (23) be provided with drive gear assorted control gear (231), be connected with dislocation distribution's crushing sword (232) on the outer wall of crushing barrel (23).
8. The apparatus for detecting heavy metals in agricultural products of claim 1, wherein: the upper end of the extrusion rod (24) is provided with an inclined block (241), the inclined block (241) is located on a movable path of the movable rod (221), the lower end of the inclined block (241) is provided with a return spring (242), the lower end of the return spring (242) is abutted to the driving gear, the lower end of the extrusion rod (24) is provided with an extrusion plate (243), and a filter screen (25) is arranged in the crushing device (2) below the extrusion plate (243).
9. A method of detecting a heavy metal in an agricultural product according to any one of claims 1 to 8, comprising the steps of:
s1: agricultural products needing to be detected are put into the crushing device (2), the driving assembly (22) drives the crushing barrel (23) to rotate, the agricultural products are crushed, when the movable rod (221) rotates, the movable rod can intermittently strike the inclined block (241), the return spring (242) is shortened, the extrusion rod (24) sinks, the extrusion plate (243) extrudes the crushed agricultural products, the separation of dregs and juice is accelerated, and the juice of the agricultural products is collected below the filter screen (25);
s2: the gear assembly (41) simultaneously drives the second rack (43) and the first rack (42) to move upwards, the first piston (421) moves upwards under the driving of the first rack (42), negative pressure is generated in the juice barrel (31), juice of agricultural products is sucked into the juice barrel (31) through a pipeline, and the position of the second piston (431) does not move upwards along with the second rack (43);
s3: when a sufficient amount of agricultural product juice is sucked into the juice barrel (31), the sealing plug (33) is rotated, the notch of the arc-shaped plug (334) faces upwards, and the gear assembly (41) rotates reversely;
s4: the second rack (43) and the first rack (42) move downwards simultaneously, the first piston (421) and the second piston (431) respectively press the juice cylinder (31) and the detection cylinder (3) to extrude the juice of the agricultural products and the reagent into the detection cylinder (3), and the juice of the agricultural products and the reagent are firstly mixed in the notch of the arc-shaped plug (334) and then flow into the detection cylinder (3);
s5: the agricultural product juice mixed with the reagent automatically flows to the observation opening in the detection cylinder (3) and is compared with the color of the colorimetric rotary cylinder (34) through the observation opening.
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| CN116500214B (en) * | 2023-06-06 | 2024-02-06 | 广东省标检产品检测认证有限公司 | Pesticide residue detection pretreatment system and method |
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