A sieving device for detecting heavy metal content in soil

Abstract

This utility model discloses a sieving device for detecting heavy metal content in soil, including a base, a telescopic rod, a stirring cover, and detachable collection cups and filter cups. The telescopic rod is fixed to the top of the base and connected to the stirring cover. The filter layer is rotatably connected to the outside of the telescopic rod, with the filter cup installed in its middle. The stirring cover has a built-in drive motor that drives the stirring blades to extend into the filter cup. The rotating stirring blades break up clumps of soil and push fine particles through the sieve. Combined with the spring-loaded positioning of the filter layer, the magnetic fixation of the collection cup, and the anti-slip design of the rubber pad on the base, efficient anti-clogging, closed-loop operation, and stable operation are achieved. This device effectively solves the problems of easy clogging of the sieve, serious dust pollution, and easy equipment displacement in traditional sieving, significantly improving the efficiency and safety of soil heavy metal detection pretreatment.

Description

Technical Field

[0001] This utility model relates to the technical field of filtration and separation devices, specifically a sieving device for detecting heavy metal content in soil. Background Technology

[0002] Currently, laboratory-grade grinding equipment mainly includes ball mills, cryogenic grinders, and blade shear grinders. Ball mills break soil particles through high-energy collisions, offering high precision but consuming a lot of energy. Cryogenic grinders use liquid nitrogen to treat embrittled organic matter at low temperatures, which can prevent the loss of volatile substances, but the grinding cost is relatively high. Blade shear grinders are suitable for fibrous soils, but they easily generate heat, affecting sample characteristics.

[0003] There are also emerging technology directions, such as microwave-assisted crushing, ultrasonic cavitation crushing, and robotic automated grinding, which have a high degree of automation, but the equipment cost is high, the grinding efficiency is low, and they are not suitable for grinding and pretreatment of large numbers of samples (such as soil surveys).

[0004] For most small and medium-sized laboratories, a combination of agate ball milling and manual sieving is used for grinding. Agate ball mills are highly efficient, grinding 4-8 samples at a time. However, after grinding the soil, it needs to be passed through a 100-mesh sieve. Due to the small mesh size, larger soil particles clog the filter cup, resulting in poor sieving and becoming a bottleneck in soil sample pretreatment. Furthermore, the sieving process generates significant dust, seriously affecting the health of operators. Therefore, a novel soil sieving device is proposed to address these issues. This device integrates sieving and collection, and operates in a fully enclosed manner, eliminating dust and pollution and protecting the health of operators. Utility Model Content

[0005] The purpose of this invention is to provide a sieving device for detecting heavy metal content in soil. Through a closed structure, automatic stirring, and stable collection design, it solves the problems of easy clogging of the screen, dust leakage, and low efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sieving device for detecting heavy metal content in soil, comprising a base, a telescopic rod fixedly connected to the top of the base, a stirring cover fixedly connected to the top of the telescopic rod, a filter layer rotatably connected to the outer side wall of the telescopic rod, a through hole in the middle of the filter layer, the telescopic rod passing through the through hole and fixedly connected to the stirring cover; a filter cup detachably installed in the middle of the filter layer, a drive motor fixedly connected to the middle of the stirring cover, a motor output rod fixedly connected to the output end of the drive motor, and a stirring blade fixedly connected to the end of the motor output rod; and a collection cup detachably installed on the top of the base.

[0007] Preferably, a pair of grooves are symmetrically provided at both ends of the filter layer, and a spring is fixedly connected to the inner side wall of the groove, and a fixing block is fixedly connected to the end of the spring; the top of the base and the bottom of the stirring cover are both provided with slots that fit the fixing block, and when the filter layer rotates to the preset position, the fixing block is locked into the slot by the elastic force of the spring.

[0008] Preferably, the top of the filter layer is provided with a placement groove, and the side wall of the filter cup is fixedly connected with a limiting groove. The limiting groove is adapted to the size of the placement groove to limit the rotation of the filter cup within the filter layer.

[0009] Preferably, the side wall of the base is symmetrically provided with a pair of mounting grooves, and a magnet is fixedly connected to the inner side wall of the mounting groove; the side wall of the collecting cup is symmetrically provided with a pair of fixing grooves, and an iron block is fixedly connected to the inner side wall of the fixing groove. The magnet and the iron block fix the collecting cup to the base by magnetic attraction.

[0010] Preferably, a plurality of rubber pads are fixedly connected to the bottom of the base, and the rubber pads are evenly distributed on the bottom edge of the base to increase the friction between the device and the worktable.

[0011] The working process of this utility model is as follows:

[0012] (1) Assembly and preparation of the device:

[0013] Insert the filter cup into the placement slot of the filter layer. The filter cup is fixed by the cooperation of the limiting groove on the side wall of the filter cup with the placement slot to prevent the filter cup from rotating. Place the collection cup on the top of the base and fix it by the magnetic attraction between the magnet on the side wall of the base and the iron block on the side wall of the collection cup to ensure the stability of the collection cup. Lift the stirring cover by manually adjusting the telescopic rod to create operating space.

[0014] (2) Sample loading and device closure:

[0015] Pour the ground soil sample into the filter cup; press down the stirring cover to retract the telescopic rod, causing the stirring blade to extend into the filter cup; rotate the filter layer to directly above the collection cup, at which point the fixing blocks at both ends of the filter layer are engaged in the slots of the base and the stirring cover under the action of the spring, completing the closure and positioning of the device.

[0016] (3) Automatic stirring and sieving:

[0017] Start the drive motor, and the motor output rod drives the stirring blades to rotate at low speed, breaking up soil clumps and pushing fine particles through the screen of the filter cup; the continuous rotation of the stirring blades effectively prevents the screen from clogging, and the sieved fine soil particles fall into the collection cup below; during the sieving process, the rubber pad at the bottom of the base increases friction to reduce device vibration and ensure operational stability.

[0018] (4) Sample collection and device reset:

[0019] After sieving, turn off the drive motor, lift the stirring cover to detach the stirring blades from the filter cup; remove the collection cup to directly obtain the sieved soil sample; disassemble the filter cup for cleaning or replacement, and after resetting the device, the next batch of tests can be carried out.

[0020] The beneficial effects of this utility model are as follows:

[0021] (1) This utility model drives the stirring blade to rotate continuously in the filter cup by driving the motor, which automatically breaks up soil clumps and pushes fine particles through the screen, effectively avoiding the screen blockage problem caused by the accumulation of large particles in traditional sieving, significantly improving sieving efficiency and reducing manual intervention.

[0022] (2) This utility model adopts a sealed design of stirring cover and filter layer, combined with magnetic fixation of detachable collection cup (magnet and iron block), to realize the closed operation of the whole process from feeding to collection, completely eliminate dust emission, protect the health of operators and avoid sample contamination.

[0023] (3) The filter layer of this utility model is precisely positioned by spring and slot to ensure the balance of the device center of gravity during sieving and prevent deviation; the rubber pad at the bottom of the base increases the friction with the workbench and reduces vibration interference; the filter cup and the collection cup can be quickly replaced to adapt to different mesh sizes of sieves and sample volume requirements, thus improving the applicability of the device. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a cross-sectional view of the present invention;

[0026] Figure 3 This is a cross-sectional view of the filter layer in this invention;

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This is a perspective view of the filter cup in this invention;

[0029] Figure 6 This is a cross-sectional view of the base and the collecting cup in this invention;

[0030] Figure 7 for Figure 6 Enlarged view at point B in the middle;

[0031] In the diagram: 1. Base; 11. Collection cup; 12. Telescopic rod; 13. Filter layer; 14. Stirring cover; 15. Drive motor; 16. Motor output rod; 17. Stirring blade; 18. Filter cup; 19. Through hole; 2. Groove; 21. Spring; 22. Fixing block; 23. Slot; 3. Placement slot; 31. Limiting slot; 4. Installation slot; 41. Magnet; 42. Fixing slot; 43. Iron block; 5. Rubber pad. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings.

[0033] like Figure 1-7 The sieving device for detecting heavy metal content in soil shown includes a base 1, a telescopic rod 12 fixedly connected to the top of the base 1, a stirring cover 14 fixedly connected to the top of the telescopic rod 12, a filter layer 13 rotatably connected to the outer side wall of the telescopic rod 12, a through hole 19 in the middle of the filter layer 13, the telescopic rod 12 passing through the through hole 19 and fixedly connected to the stirring cover 14; a filter cup 18 is detachably installed in the middle of the filter layer 13, a drive motor 15 is fixedly connected to the middle of the stirring cover 14, a motor output rod 16 is fixedly connected to the output end of the drive motor 15, and a stirring blade 17 is fixedly connected to the end of the motor output rod 16; a collection cup 11 is detachably installed on the top of the base 1.

[0034] A pair of grooves 2 are symmetrically formed at both ends of the filter layer 13. A spring 21 is fixedly connected to the inner sidewall of the groove 2, and a fixing block 22 is fixedly connected to the end of the spring 21. The top of the base 1 and the bottom of the stirring cover 14 are both provided with slots 23 that are adapted to the fixing block 22. When the filter layer 13 rotates to a preset position, the fixing block 22 is engaged into the slot 23 by the elastic force of the spring 21. A placement groove 3 is formed at the top of the filter layer 13, and a limiting groove 31 is fixedly connected to the sidewall of the filter cup 18. The limiting groove 31 is adapted to the size of the placement groove 3 and is used to limit the rotation of the filter cup 18 within the filter layer 13.

[0035] A pair of mounting slots 4 are symmetrically formed on the side wall of the base 1, and a magnet 41 is fixedly connected to the inner side wall of the mounting slot 4. A pair of fixing slots 42 are symmetrically formed on the side wall of the collecting cup 11, and an iron block 43 is fixedly connected to the inner side wall of the fixing slot 42. The magnet 41 and the iron block 43 fix the collecting cup 11 to the base 1 by magnetic attraction. A number of rubber pads 5 are fixedly connected to the bottom of the base 1. The rubber pads 5 are evenly distributed on the bottom edge of the base 1 to increase the friction between the device and the worktable.

[0036] The working process of this utility model is as follows:

[0037] (1) Assembly and preparation of the device:

[0038] Insert the filter cup 18 into the placement groove 3 of the filter layer 13. The filter cup is fixed by the cooperation of the limiting groove 31 on the side wall of the filter cup and the placement groove 3 to prevent the filter cup from rotating. Place the collection cup 11 on the top of the base 1. The collection cup is fixed by the magnetic attraction between the magnet 41 on the side wall of the base and the iron block 43 on the side wall of the collection cup to ensure that the position of the collection cup is stable. The stirring cover 14 is lifted by manually adjusting the telescopic rod 12 to form an operating space.

[0039] (2) Sample loading and device closure:

[0040] Pour the ground soil sample into the filter cup 18; press down the stirring cover 14 to retract the telescopic rod 12, causing the stirring blade 17 to extend into the filter cup 18; rotate the filter layer 13 to directly above the collection cup 11, at which point the fixing blocks 22 at both ends of the filter layer are engaged in the slots 23 of the base 1 and the stirring cover 14 under the action of the spring 21, completing the closure and positioning of the device.

[0041] (3) Automatic stirring and sieving:

[0042] Start the drive motor 15, and the motor output rod 16 drives the stirring blade 17 to rotate at low speed, breaking up soil clumps and pushing fine particles through the screen of the filter cup 18; the continuous rotation of the stirring blade 17 effectively prevents the screen from clogging, and the sieved fine soil particles fall into the collection cup 11 below; during the sieving process, the rubber pad 5 at the bottom of the base 1 increases friction to reduce device vibration and ensure operational stability.

[0043] (4) Sample collection and device reset:

[0044] After sieving, turn off the drive motor 15 and lift the stirring cover 14 to disengage the stirring blade 17 from the filter cup 18.

[0045] Remove the collection cup 11 to directly obtain the sieved soil sample; disassemble the filter cup 18 for cleaning or replacement, and the device can be reset for the next batch of testing.

[0046] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, based on the technical teachings provided by this utility model and as common knowledge in the field, other equivalent modifications and improvements can be made, and these should also be considered within the protection scope of this utility model.

Claims

1. A sifting device for detecting the content of heavy metals in soil, characterized in that, The system includes a base (1), a telescopic rod (12) fixedly connected to the top of the base (1), a stirring cover (14) fixedly connected to the top of the telescopic rod (12), a filter layer (13) rotatably connected to the outer side wall of the telescopic rod (12), a through hole (19) opened in the middle of the filter layer (13), the telescopic rod (12) passing through the through hole (19) and fixedly connected to the stirring cover (14); a filter cup (18) is detachably installed in the middle of the filter layer (13), a drive motor (15) is fixedly connected in the middle of the stirring cover (14), a motor output rod (16) is fixedly connected to the output end of the drive motor (15), and a stirring blade (17) is fixedly connected to the end of the motor output rod (16); a collection cup (11) is detachably installed on the top of the base (1).

2. The screening device for detecting the content of heavy metals in soil according to claim 1, characterized in that: The filter layer (13) has a pair of grooves (2) symmetrically opened at both ends. A spring (21) is fixedly connected to the inner side wall of the groove (2). A fixing block (22) is fixedly connected to the end of the spring (21). The top of the base (1) and the bottom of the stirring cover (14) are both provided with slots (23) that are adapted to the fixing block (22). When the filter layer (13) is rotated to the preset position, the fixing block (22) is inserted into the slot (23) by the elastic force of the spring (21).

3. The sifting device for detecting the content of heavy metals in soil according to claim 1 or 2, characterized in that: The top of the filter layer (13) is provided with a placement groove (3), and the side wall of the filter cup (18) is fixedly connected with a limiting groove (31). The limiting groove (31) is adapted to the size of the placement groove (3) to limit the rotation of the filter cup (18) in the filter layer (13).

4. The sifting device for detecting the content of heavy metals in soil according to claim 3, characterized in that: The base (1) has a pair of symmetrical mounting slots (4) on its side wall, and a magnet (41) is fixedly connected to the inner side wall of the mounting slot (4); the collection cup (11) has a pair of symmetrical fixing slots (42) on its side wall, and an iron block (43) is fixedly connected to the inner side wall of the fixing slot (42). The magnet (41) and the iron block (43) fix the collection cup (11) to the base (1) by magnetic attraction.

5. The sifting device for detecting the content of heavy metals in soil according to claim 4, characterized in that: The bottom of the base (1) is fixedly connected with multiple rubber pads (5), which are evenly distributed on the bottom edge of the base (1) to increase the friction between the device and the workbench.

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