Device for detecting heavy metals in agricultural products

Abstract

The invention discloses a device for detecting heavy metals in agricultural products, and belongs to the technical field of agricultural product detection equipment. The smashing mechanism comprises a smashing cylinder, the smashing cylinder is fixedly connected to the detection frame, the top of the smashing cylinder communicates with a feeding pipe, the bottom of the smashing cylinder communicates with a liquid discharging pipe, the smashing cylinder is fixedly connected to the detection frame, a cover body is connected to the top of the smashing cylinder in a sealed and clamped mode, and a rotating assembly is connected to the cover body; and an electric telescopic rod is mounted at the bottom of the crushing cylinder. According to the agricultural product crushing device, a rotating assembly is matched with an electric telescopic rod, so that a rotating sleeve can drive a spiral blade to rotate and move up and down, the spiral blade rotates to crush agricultural product blocks, and when the spiral blade rotates and moves downwards at the same time, the agricultural product blocks on a filter screen are crushed through an extrusion strip; the residue-juice separation effect of the agricultural product blocks is improved; and a matched crushing cylinder is matched, so that a juice conveying effect can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural product detection equipment, and in particular relates to a device for detecting heavy metals in agricultural products. Background Art

[0002] Agricultural product testing equipment includes agricultural product heavy metal detection devices, which are used to detect heavy metals in agricultural products. Heavy metal elements are easily absorbed by agricultural plants during growth through the soil, atmosphere and irrigation water sources, and enter the food chain with agricultural plants, which will eventually affect human health. Therefore, it is necessary to conduct heavy metal detection on agricultural products to avoid the enrichment of heavy metal elements in agricultural products and prevent unhealthy agricultural products from entering the market.

[0003] In traditional technology, agricultural products are tested for heavy metals using agricultural product heavy metal detection devices, which usually requires the agricultural products to be crushed to obtain the juice of the agricultural products, and then heavy metal detection reagents are added to the juice. After the agricultural product juice and the heavy metal detection reagent are mixed and reacted, the heavy metal detection of the agricultural products is completed by comparing the mixed reactants with a colorimetric card. However, this requires manual operation by inspectors, and the mixed reactants are easily spilled and come into contact with inspectors, causing harm to the inspectors.

[0004] In the prior art, a crushing device is provided to crush the agricultural product blocks and separate the residue and juice, and then the juice is extracted from the crushing device through an extraction mechanism to mix with reagents for heavy metal detection. In this method, an additional extraction mechanism is required to extract the juice, which increases the cost. The juice cannot be transported during the crushing of the agricultural product blocks, which reduces the efficiency of heavy metal detection of agricultural products. In addition, a stirring component is required to mix the juice and the reagent. The mixing operation of the juice and the reagent cannot be completed during the crushing of the agricultural product blocks, which reduces the efficiency of heavy metal detection of agricultural products. Summary of the invention

[0005] The purpose of the present invention is to propose a device for detecting heavy metals in agricultural products to solve the problem that in traditional technology, an additional extraction mechanism is required to extract juice, which increases the cost, fails to transport the juice during the process of crushing agricultural product blocks, and reduces the efficiency of heavy metal detection of agricultural products.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A device for detecting heavy metals in agricultural products, comprising:

[0008] Testing rack;

[0009] The pulverizing mechanism comprises a pulverizing barrel, the pulverizing barrel is fixedly connected to the detection frame, the top of the pulverizing barrel is connected to a feed pipe, and the bottom is connected to a drain pipe, the pulverizing barrel is fixedly connected to the detection frame, the top of the pulverizing barrel is sealed and clamped with a cover body, the cover body is connected with a rotating assembly, an electric telescopic rod is installed at the bottom of the pulverizing barrel, the output end of the electric telescopic rod is coaxially rotatably connected with a rotating sleeve, the rotating sleeve is sealed away from the end of the electric telescopic rod and penetrates the bottom of the pulverizing barrel, and coaxially extends into the pulverizing barrel, and is coaxially slidably connected with the output end of the rotating assembly, the rotating sleeve is fixedly connected with a plurality of pulverizing rods, and is coaxially fixedly connected with a spiral blade, the bottom diameter of the inner side wall of the pulverizing barrel is smaller than the top diameter of the inner side wall, the outer peripheral side of the spiral blade is coaxially gap-matched with the bottom of the inner side wall of the pulverizing barrel, a filter screen is connected in the pulverizing barrel, and the filter screen is located between the spiral blade and the drain pipe;

[0010] The detection mechanism comprises a detection barrel, the detection barrel is fixedly connected to the detection frame, the end of the discharge pipe away from the crushing tube is connected to the inside of the detection barrel, the top of the detection barrel is connected to a medicine pipe, and the bottom is connected to a waste liquid pipe.

[0011] Preferably, the rotating assembly includes a driving motor, which is mounted on the cover body. The output end of the driving motor is coaxially fixedly connected with a driving shaft. The driving shaft seals and passes through the cover body at one end away from the driving motor, and coaxially extends into the crushing barrel, and is coaxially slidably connected with the inside of the rotating sleeve. The end of the driving shaft extending into the crushing barrel is fixedly connected with a connecting strip, and the end of the connecting strip away from the driving shaft is fixedly connected with a scraper, and the scraper rests on the top of the inner wall of the crushing barrel.

[0012] Preferably, a feed valve is installed on the feed pipe, a drain valve and a check valve are installed on the drain pipe, and the check valve is close to the detection barrel.

[0013] Preferably, an extrusion strip is fixedly connected to the bottom of the spiral blade, and the extrusion strip is made of rubber. After the extrusion strip moves downward, it is in extrusion contact with the top of the filter screen.

[0014] Preferably, a plurality of return springs are fixedly connected to the bottom of the filter, and the bottom ends of the plurality of return springs are fixedly connected to the bottom of the crushing cylinder. The filter is initially located at the place where the diameter of the crushing cylinder changes, and a through opening is opened in the middle of the filter for the outer peripheral side of the rotating sleeve to slide through.

[0015] Preferably, the detection mechanism also includes a stirring assembly, the stirring assembly includes a rotary joint, the rotary joint is rotatably connected to the end of the discharge pipe extending into the detection barrel, the bottom of the rotary joint is fixedly connected to a rotating shaft, a plurality of stirring rods are fixedly connected to the rotating shaft, the bottom end of the rotating shaft is coaxially rotatably connected to the bottom of the detection barrel, the output end of the rotary joint is connected to a plurality of recoil pipes, the axial directions of the plurality of recoil pipes away from one end of the rotary joint are all along the same tangential direction of the barrel wall of the detection barrel, the top of the detection barrel is connected to an air outlet pipe, a filter assembly is installed in the air outlet pipe, the top of the pulverizing barrel is connected to an air inlet pipe, an air inlet valve is installed on the air inlet pipe, the air inlet valve adopts a one-way valve, and the one-way conduction direction is from the outside to the inside of the pulverizing barrel.

[0016] Preferably, an observation window is installed on the detection barrel, and the observation window is made of colorless and transparent material.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention provides a crushing mechanism. The rotating assembly cooperates with the electric telescopic rod to enable the rotating sleeve to drive the spiral blade to rotate and move up and down. The rotation of the spiral blade forms a crushing effect on the agricultural product blocks. When the spiral blade moves downward while rotating, the agricultural product blocks on the filter screen are crushed by the extrusion bar, thereby improving the separation effect of the residue and juice of the agricultural product blocks; and in combination with the matching crushing cylinder, it can form a conveying effect on the juice, without the need to additionally set up an extraction mechanism to extract the juice, thereby reducing the cost, and providing power for the subsequent stirring assembly during the process of conveying the juice, thereby improving the mixing and detection efficiency of the agricultural product juice and the heavy metal detection agent.

[0019] 2. In the present invention, a crushing mechanism and a stirring assembly are provided, and the output end of the electric telescopic rod is periodically extended and shortened, so that the increased air pressure at the bottom of the crushing cylinder caused by the rotation of the spiral blades fluctuates, thereby changing the rotation rate of the recoil tube, forming a more complex stirring operation in the detection barrel, and improving the stirring and mixing effect of agricultural product juice and heavy metal detection agents. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic structural diagram of a vertical cross-section state of a pulverizing cylinder and an air intake pipe of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of part of the liquid discharge pipe and the stirring assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the detection barrel of the present invention in a vertical cross-sectional state;

[0024] Figure 5 It is a schematic diagram of the working state structure of the pulverizing mechanism of the present invention.

[0025] In the figure: 1 detection frame, 2 crushing cylinder, 3 cover body, 4 driving motor, 5 driving shaft, 6 electric telescopic rod, 7 rotating sleeve, 8 crushing rod, 9 spiral blade, 10 extrusion bar, 11 filter screen, 111 return spring, 12 feed pipe, 13 feed valve, 14 air inlet pipe, 15 air inlet valve, 16 discharge pipe, 17 discharge valve, 18 check valve, 19 detection barrel, 20 rotary joint, 21 recoil pipe, 22 rotating shaft, 23 stirring rod, 24 medicine pipe, 25 medicine valve, 26 air outlet pipe, 27 observation window, 28 waste liquid pipe, 29 waste liquid valve, 30 connecting strip, 31 scraper. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Reference Figure 1-Figure 5 , a heavy metal detection device in agricultural products, comprising:

[0028] Detection rack 1.

[0029] The pulverizing mechanism comprises a pulverizing barrel 2, which is fixedly connected to the detection frame 1. The top of the pulverizing barrel 2 is connected to a feed pipe 12, and the bottom is connected to a drain pipe 16. The pulverizing barrel 2 is fixedly connected to the detection frame 1. The top of the pulverizing barrel 2 is sealed and clamped with a cover body 3, and a rotating assembly is connected to the cover body 3. An electric telescopic rod 6 is installed at the bottom of the pulverizing barrel 2. The output end of the electric telescopic rod 6 is coaxially rotatably connected with a rotating sleeve 7. The end of the rotating sleeve 7 away from the electric telescopic rod 6 is sealed and penetrates the bottom of the pulverizing barrel 2, and coaxially extends into the pulverizing barrel 2, and is coaxially slidably connected with the output end of the rotating assembly. The rotating sleeve 7 is fixedly connected with a plurality of pulverizing rods 8, and is coaxially fixedly connected with a spiral blade 9. The bottom diameter of the inner wall of the pulverizing barrel 2 is smaller than the top diameter of the inner wall. The outer peripheral side of the spiral blade 9 is coaxially gap-matched with the bottom of the inner wall of the pulverizing barrel 2. A filter screen 11 is connected inside the pulverizing barrel 2, and the filter screen 11 is located between the spiral blade 9 and the drain pipe 16.

[0030] The crushing cylinder 2 is fixed to the detection frame 1 by bolts, and the crushing cylinder 2 can be easily disassembled by the bolts to clean the inside thereof.

[0031] The spiral blade 9 conveys axially upward along the axial direction of the rotating sleeve 7. When the spiral blade 9 rotates, it pushes the air and liquid in the vicinity thereof to flow downward.

[0032] The rotating assembly includes a driving motor 4, which is mounted on the cover body 3. The output end of the driving motor 4 is coaxially fixedly connected with a driving shaft 5. The end of the driving shaft 5 away from the driving motor 4 is sealed and passes through the cover body 3, and coaxially extends into the crushing barrel 2, and is coaxially slidably connected with the inside of the rotating sleeve 7. The end of the driving shaft 5 extending into the crushing barrel 2 is fixedly connected with a connecting strip 30, and the end of the connecting strip 30 away from the driving shaft 5 is fixedly connected with a scraper 31, and the scraper 31 rests on the top of the inner wall of the crushing barrel 2.

[0033] A feed valve 13 is installed on the feed pipe 12 , a discharge valve 17 and a check valve 18 are installed on the discharge pipe 16 , and the check valve 18 is close to the detection barrel 19 .

[0034] An extrusion strip 10 is fixedly connected to the bottom of the spiral blade 9. The extrusion strip 10 is made of rubber. After moving downward, the extrusion strip 10 is extruded and contacted with the top of the filter screen 11. The extrusion strip 10 is elastic. When the extrusion strip 10 rotates with the spiral blade 9 and rolls over the filter screen 11, the extrusion strip 10 can be elastically deformed. The extrusion strip 10 and the filter screen 11 are stuck together, which makes it convenient for the extrusion strip 10 to pass over the filter screen 11 and attach to stable agricultural product fragments, thereby ensuring the rolling effect.

[0035] A plurality of return springs 111 are fixedly connected to the bottom of the filter 11, and the bottom ends of the plurality of return springs 111 are fixedly connected to the bottom of the crushing cylinder 2. The filter 11 is initially located at the point where the diameter of the crushing cylinder 2 changes, and a through hole is opened in the middle of the filter 11 for the outer peripheral side of the rotating sleeve 7 to slide through.

[0036] The detection mechanism includes a detection barrel 19, which is fixedly connected to the detection frame 1, and the end of the discharge pipe 16 away from the crushing tube 2 is connected to the inside of the detection barrel 19. The top of the detection barrel 19 is connected to a medicine pipe 24, and the bottom is connected to a waste liquid pipe 28.

[0037] The detection mechanism also includes a stirring assembly, which includes a rotary joint 20. The rotary joint 20 is rotatably connected to one end of the discharge pipe 16 extending into the detection barrel 19. A rotating shaft 22 is fixedly connected to the bottom of the rotary joint 20, and a plurality of stirring rods 23 are fixedly connected to the rotating shaft 22. The bottom end of the rotating shaft 22 is coaxially rotatably connected to the bottom of the detection barrel 19. The output end of the rotary joint 20 is connected to a plurality of recoil pipes 21. The axial directions of the plurality of recoil pipes 21 away from one end of the rotary joint 20 are all along the same tangential direction of the barrel wall of the detection barrel 19. The top of the detection barrel 19 is connected to an air outlet pipe 26, and a filter assembly is installed in the air outlet pipe 26. The top of the pulverizing barrel 2 is connected to an air inlet pipe 14, and an air inlet valve 15 is installed on the air inlet pipe 14. The air inlet valve 15 adopts a one-way valve, and the one-way conduction direction is from the outside to the inside of the pulverizing barrel 2.

[0038] The filter component adopts an activated carbon filter device in the prior art to filter the exhaust gas to avoid direct discharge into the working environment and causing impact on the working environment and staff.

[0039] An observation window 27 is installed on the detection barrel 19 . The observation window 27 is made of a colorless and transparent material, so that the mixed reactants in the detection barrel 19 can be observed conveniently through the observation window 27 .

[0040] When working, open the feed valve 13, put the agricultural product blocks to be tested into the crushing cylinder 2 through the feed pipe 12, and close the feed valve 13;

[0041] The drive motor 4 is started and starts working. The output end of the drive motor 4 drives the drive shaft 5 to rotate. The rotation of the drive shaft 5 drives the rotating sleeve 7 to rotate. The rotation of the rotating sleeve 7 drives the crushing rod 8 and the spiral blade 9 to rotate. Under the elastic force of the reset spring 111, the filter 11 abuts against the diameter change of the crushing cylinder 2, so that the agricultural product blocks are located in the crushing cylinder 2 above the filter 11. The crushing rod 8 and the spiral blade 9 rotate to crush the agricultural product blocks, so that the juice of the agricultural product passes through the filter 11 and falls into the bottom of the crushing cylinder 2, which is convenient for subsequent detection.

[0042] When the driving shaft 5 rotates, the scraper 31 is driven to rotate through the connecting bar 30. The rotation of the scraper 31 forms a scraping effect on the top of the inner wall of the crushing cylinder 2, effectively preventing the agricultural product blocks from adhering to the inner wall of the crushing cylinder 2, and improving the crushing integrity of the agricultural product;

[0043] During the process of crushing the agricultural products, the electric telescopic rod 6 is started, and the output end of the electric telescopic rod 6 contracts to drive the rotating sleeve 7 to move downward, so that the spiral blade 9 partially extends under the crushing cylinder 2. At this time, when the spiral blade 9 rotates, it cooperates with the bottom of the inner wall of the crushing cylinder 2 to form a downward stirring and pushing effect on the agricultural product pieces and air;

[0044] The spiral blade 9 moves downward, and the squeezing bar 10 at the bottom thereof begins to squeeze and contact the filter screen 11. Under the rotation of the spiral blade 9, the squeezing bar 10 forms a rolling effect on the crushed agricultural product blocks on the filter screen 11, further accelerating the outflow of the juice in the agricultural product blocks;

[0045] After the separation of the residue and juice of the agricultural products is completed, the reagent valve 25 is opened, and the reagent for heavy metal detection is passed into the detection barrel 19 through the reagent pipe 24, and the reagent valve 25 is closed;

[0046] At the same time, the spiral blade 9 rotates to increase the air pressure at the bottom of the grinding cylinder 2. At this time, the drain valve 17 is opened. Under the action of air pressure, the juice at the bottom of the grinding cylinder 2 is pressed into the detection barrel 19 through the drain pipe 16, and the outside air is added into the grinding cylinder 2 through the air inlet pipe 14. Finally, it is discharged after being filtered by the filter assembly through the air outlet pipe 26. The juice passes through the rotary joint 20 and then sprays out through multiple recoil pipes 21, so that the agricultural product juice and the heavy metal detection agent are mixed. Under the recoil effect of the juice, the multiple recoil pipes 21 and the rotary joint 20 drive the rotating shaft 22 to rotate. The rotation of the rotating shaft 22 drives the stirring rod 23 to cooperate with the rotating recoil pipe 21 to form a stirring effect on the agricultural product juice and the heavy metal detection agent in the detection barrel 19, thereby increasing the mixing reaction rate of the agricultural product juice and the heavy metal detection agent and improving the detection efficiency.

[0047] When the recoil tube 21 rotates due to the recoil effect to stir the inside of the detection barrel 19, the output end of the electric telescopic rod 6 is controlled to extend and shorten periodically, so that the increased air pressure at the bottom of the crushing barrel 2 caused by the rotation of the spiral blade 9 fluctuates, thereby changing the rotation speed of the recoil tube 21, forming a more complex stirring operation in the detection barrel 19, and improving the stirring and mixing effect of the agricultural product juice and the heavy metal detection agent;

[0048] Furthermore, the backwash pipe 21 may be submerged in the mixed liquid, so that after the juice and air in the backwash pipe 21 flow out, bubbles are formed in the mixed liquid, and the mixing effect of the mixed liquid is further improved through the generation, floating and bursting of the bubbles;

[0049] Finally, a comparative analysis is performed using a colorimetric card through the observation window 27 to complete the detection of heavy metals in agricultural products;

[0050] After the mixing and detection are completed, the waste liquid valve 29 is opened and the mixed liquid is discharged through the waste liquid pipe 28.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for detecting heavy metals in agricultural products, characterized in that: include: Detection rack (1); The pulverizing mechanism comprises a pulverizing cylinder (2), the pulverizing cylinder (2) is fixedly connected to the detection frame (1), the top of the pulverizing cylinder (2) is connected to a feed pipe (12), and the bottom is connected to a discharge pipe (16), the pulverizing cylinder (2) is fixedly connected to the detection frame (1), the top of the pulverizing cylinder (2) is sealed and clamped with a cover body (3), the cover body (3) is connected to a rotating assembly, the bottom of the pulverizing cylinder (2) is installed with an electric telescopic rod (6), the output end of the electric telescopic rod (6) is coaxially rotatably connected with a rotating sleeve (7), and the rotating sleeve (7) is away from the electric One end of the telescopic rod (6) is sealed and penetrates the bottom of the crushing cylinder (2), and coaxially extends into the crushing cylinder (2), and is coaxially slidably connected with the output end of the rotating component. The rotating sleeve (7) is fixedly connected with a plurality of crushing rods (8), and is coaxially fixedly connected with a spiral blade (9). The bottom diameter of the inner wall of the crushing cylinder (2) is smaller than the top diameter of the inner wall. The outer peripheral side of the spiral blade (9) is coaxially gap-matched with the bottom of the inner wall of the crushing cylinder (2). A filter screen (11) is connected inside the crushing cylinder (2), and the filter screen (11) is located between the spiral blade (9) and the drain pipe (16); The detection mechanism comprises a detection barrel (19), the detection barrel (19) is fixedly connected to the detection frame (1), the end of the liquid discharge pipe (16) away from the crushing cylinder (2) is connected to the inside of the detection barrel (19), the top of the detection barrel (19) is connected to a medicine pipe (24), and the bottom is connected to a waste liquid pipe (28).

2. The device for detecting heavy metals in agricultural products according to claim 1, characterized in that: in: The rotating assembly comprises a driving motor (4), wherein the driving motor (4) is mounted on the cover body (3), and the output end of the driving motor (4) is coaxially fixedly connected with a driving shaft (5), and the end of the driving shaft (5) away from the driving motor (4) is sealed and penetrates the cover body (3), and coaxially extends into the crushing cylinder (2), and is coaxially slidably connected with the inside of the rotating sleeve (7), and the end of the driving shaft (5) extending into the crushing cylinder (2) is fixedly connected with a connecting strip (30), and the end of the connecting strip (30) away from the driving shaft (5) is fixedly connected with a scraper (31), and the scraper (31) abuts against the top of the inner wall of the crushing cylinder (2).

3. The device for detecting heavy metals in agricultural products according to claim 1, characterized in that: in: The feed pipe (12) is provided with a feed valve (13), the discharge pipe (16) is provided with a discharge valve (17) and a check valve (18), and the check valve (18) is close to the detection barrel (19).

4. The device for detecting heavy metals in agricultural products according to claim 1, characterized in that: in: The bottom of the spiral blade (9) is fixedly connected with an extrusion strip (10), the extrusion strip (10) is made of rubber, and after the extrusion strip (10) moves downward, it is in extrusion contact with the top of the filter screen (11).

5. The device for detecting heavy metals in agricultural products according to claim 1, characterized in that: in: The bottom of the filter screen (11) is fixedly connected to a plurality of return springs (111), the bottom ends of the plurality of return springs (111) are fixedly connected to the bottom of the crushing cylinder (2), the filter screen (11) is initially located at a position where the diameter of the crushing cylinder (2) changes, and a through opening is provided in the middle of the filter screen (11) for the outer peripheral side of the rotating sleeve (7) to slide through.

6. The device for detecting heavy metals in agricultural products according to claim 1, characterized in that: in: The detection mechanism further comprises a stirring assembly, the stirring assembly comprising a rotating joint (20), the rotating joint (20) being rotatably connected to one end of the liquid discharge pipe (16) extending into the detection barrel (19), the bottom of the rotating joint (20) being fixedly connected to a rotating shaft (22), a plurality of stirring rods (23) being fixedly connected to the rotating shaft (22), the bottom end of the rotating shaft (22) being coaxially rotatably connected to the bottom of the detection barrel (19), the output end of the rotating joint (20) being connected to a plurality of recoil springs (23) The plurality of recoil pipes (21) are axially arranged at one end away from the rotary joint (20) in the same tangential direction of the barrel wall of the detection barrel (19); the top of the detection barrel (19) is connected to an air outlet pipe (26); a filter assembly is installed in the air outlet pipe (26); the top of the pulverizing barrel (2) is connected to an air inlet pipe (14); an air inlet valve (15) is installed on the air inlet pipe (14); the air inlet valve (15) is a one-way valve, and the one-way conduction direction is from the outside to the inside of the pulverizing barrel (2).

7. The device for detecting heavy metals in agricultural products according to claim 1, characterized in that: in: An observation window (27) is installed on the detection barrel (19), and the observation window (27) is made of colorless and transparent material.

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