A semi-automatic anti-pollution powder sample divider
By combining a detachable reduction disc and a reusable centrifuge sleeve with traditional manual reduction methods, the problem of low efficiency in multi-sample reduction of fully automatic reduction instruments is solved, enabling rapid replacement and cleaning, and ensuring sample representativeness and accuracy of analytical results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-24
AI Technical Summary
Existing fully automated sample reduction instruments are inefficient in multi-sample reduction work and suffer from cross-contamination and insufficient sample representativeness.
A semi-automatic, pollution-resistant powder sample reduction instrument was designed. It adopts a detachable reduction disc and a reusable or disposable centrifuge sleeve, combined with traditional manual reduction methods, to ensure sample representativeness. The detachable structure enables quick replacement and cleaning.
It improves the efficiency of multi-sample reduction, reduces cross-contamination, ensures sample representativeness, simplifies the cleaning and maintenance process, and enhances the convenience of the equipment and the accuracy of the analysis results.
Smart Images
Figure CN224552845U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of powder sample reduction instruments, and in particular to a semi-automatic, pollution-proof powder sample reduction instrument. Background Technology
[0002] Currently available rotary centrifuges can automatically reduce samples and have a high degree of mechanization, but they are not suitable for laboratories that need to reduce a large number of samples to powder samples, and there is no significant improvement in work efficiency.
[0003] Defects and shortcomings of existing technology:
[0004] Commercially available fully automatic sample reduction instruments, while capable of rapid sample mixing, suffer from low efficiency due to long reduction times. Disassembly and cleaning of the equipment are complex, making them unsuitable for multi-sample reduction. This is primarily because the centrifuge rotor, after use on one sample, requires cleaning and drying before the next sample reduction to prevent cross-contamination. While the reduction cups can be readily prepared, other components are not disassembled, resulting in lengthy cleaning times. The centrifuge components must be wiped clean with water or a damp cloth, ensuring no contamination, and then air-dried before proceeding with the next sample reduction. Traditional manual reduction methods include the "quartering method," and to enhance sample representativeness, additional reduction points can be added, such as the 9-point method or the 16-point method using strip-shaped limiting blocks. Mechanical reduction methods do not employ this traditional approach, potentially leading to insufficient representativeness of powder samples after reduction. Summary of the Invention
[0005] This invention addresses the aforementioned shortcomings of existing technologies by providing a semi-automatic, contamination-resistant powder sample reducer. A reusable or disposable sleeve can be added to the inner wall of the centrifuge, allowing for quick disassembly and immediate preparation of the next powder sample after the previous sample has been prepared. The reducing disc is detachable and washable. During cleaning, the reducing disc can be quickly replaced without affecting the preparation of the next sample.
[0006] The objective of this utility model is achieved through the following technical solution:
[0007] A semi-automatic, pollution-resistant powder sample reduction apparatus includes a housing, a top cover, a sample tray frame, a flat plate, a centrifuge cylinder, a toothed disc, a fixed support plate, ball bearings, a semi-circular centrifuge sleeve, a scraper, and a motor. The sample tray is internally connected to the sample tray frame, which has multiple discharge holes. The lower part of the sample tray frame has T-shaped grooves, with a set of T-shaped grooves distributed along the lower portion of the frame. The lower surface of the sample tray frame is in contact with the upper surface of the flat plate. The upper part of the flat plate has T-shaped sliders that rest on the flat plate. The components are symmetrically arranged, with T-shaped sliders and T-shaped grooves adapted to each other. The T-shaped sliders are inserted into the T-shaped grooves and slide within them. The flat plate has a side plate, and a handle is connected to the side of the side plate. The scraper is connected to a scraper side block, which is symmetrically arranged on both sides of the scraper. The outer shell of the box has a strip-shaped sliding hole, and the scraper side block is adapted to the strip-shaped sliding hole. The scraper side block is inserted into the strip-shaped sliding hole and slides within it. The handle is connected to a strip-shaped insertion hole. The outer shell of the box has a clearance hole.
[0008] The outer frame of the sample tray is adapted to the outer shell of the box, and the outer frame of the sample tray is inserted into the outer shell of the box. The outer shell of the box has a strip-shaped insertion hole, and the flat side plate is adapted to the strip-shaped insertion hole. The flat side plate is inserted into the strip-shaped insertion hole. The outer shell of the box has a lower storage groove, and the sample collection tray is adapted to the lower storage groove. The sample collection tray is inserted into the lower storage groove and is placed below the sample tray. The side of the sample collection tray is connected to a second handle.
[0009] The fixed support plate is adapted to the outer shell of the chamber. The fixed support plate is inserted into the outer shell of the chamber and connected to the outer shell of the chamber. The ball bearings are inserted into the fixed support plate and roll inside the fixed support plate. The outer side of the centrifuge cylinder has a circular convex ring. The upper surface of the ball bearings is in contact with the circular convex ring. Multiple ball bearings are evenly distributed between the fixed support plate and the circular convex ring. Two sets of fixed support plates and circular convex rings are distributed on the outer side of the centrifuge cylinder. Beneficial effects
[0010] 1. This utility model uses a T-shaped slider inserted into a T-shaped groove, allowing the flat plate to be positioned below the sample tray frame. The flat plate can slide under the sample tray frame. The sample tray frame, sample tray, and flat plate together form a detachable reducing plate. This detachable reducing plate innovatively adopts an upper and lower layer structure design: the upper layer is a sample tray with twenty holes, and the lower layer is a pull-out flat plate. The reducing plate is designed with an upper and lower layer structure. The upper layer, based on the twenty-point reduction principle, is machined with twenty evenly distributed through holes to ensure uniform sample dispersion. The lower layer is a pull-out flat plate structure, which, through a sliding rail or other connection method, allows for rapid pulling out of the flat plate and controls sample descent. A fixed support plate is installed and fixed inside the outer shell of the chamber. The fixed support plate supports a circular convex ring through multiple ball bearings. The fixed support plate, ball bearings, and circular convex ring together form a fixed bracket. As the core support component, the fixed bracket can stably fix the centrifuge cylinder and ensure stable operation during centrifugation. A strip-shaped limiting block is inserted into the side sliding groove of the centrifuge sleeve. The strip-shaped limiting block axially positions the semi-circular centrifuge sleeve, allowing the symmetrical semi-circular centrifuge sleeves to fit together inside the centrifuge cylinder. This detachable structural design allows for the selection of materials such as stainless steel or polycarbonate (PC) to manufacture the semi-circular centrifuge sleeves, tailored to different sample characteristics. A standardized interface is designed to ensure a tight fit with the inner wall of the centrifuge device, and for easy assembly and disassembly, meeting the needs of cyclic or single-use applications. The motor is installed and fixed inside the outer shell of the chamber. The toothed disc can mesh with the outer teeth of the centrifuge tube, so that the motor controls the centrifuge tube to rotate during operation. The rotation of the centrifuge tube performs centrifugal mixing of the powder inside. The rubber sleeve is plugged at the lower part of the centrifuge tube to prevent powder from falling. After the centrifugation device has completed the mixing, the rubber sleeve is opened and the sample falls into the sample tray. The scraper is placed above the outer frame of the sample tray and is limited by symmetrical scraper side blocks. The scraper can be controlled by holding the handle on the outside of the chamber shell. The powder inside the outer frame of the sample tray is manually leveled by the scraper to achieve uniform sample distribution. Then, the lower plate is quickly pulled out, and the sample slowly falls into the detachable sample collection tray below like sand in an hourglass. After a suitable amount of sample has been collected, the plate is quickly closed, and the sample remaining on the sample tray can also be easily collected and stored.
[0011] 2. This utility model offers highly efficient pollution prevention: By incorporating a reusable or disposable semi-circular centrifuge sleeve on the inner wall of the centrifuge tube, and a detachable rubber sleeve at the lower opening, the problem of cross-contamination of samples is effectively solved. After preparing the previous sample, the centrifuge tube can be quickly disassembled without requiring a long waiting time for cleaning and drying, significantly shortening the sample replacement interval and improving the fraction reduction efficiency. It is particularly suitable for continuous fraction reduction of multiple samples.
[0012] 3. This utility model facilitates cleaning and maintenance: The detachable sample tray frame, flat plate, and rubber sleeve design make cleaning and maintenance simple and convenient. The reducing plate adopts an upper and lower structure, which can be quickly replaced during the cleaning process without affecting the preparation of the next sample. This changes the drawbacks of traditional fully automatic reducing instruments, which are complicated and time-consuming to clean, reduces the workload of operators, and improves the convenience of using the equipment.
[0013] 4. This utility model ensures sample representativeness: It innovatively combines the principle of traditional manual reduction method with mechanical device, adopts circular convex ring point reduction method, and performs sample reduction through the upper circular convex ring hole sample disk. Compared with the traditional mechanical sample division method, it can make the reduced powder sample more representative, effectively overcome the defect of insufficient sample representativeness of the existing mechanical sample division method, and improve the accuracy and reliability of experimental analysis results.
[0014] 5. The structure of this utility model is flexible and practical: the semi-circular centrifuge sleeve offers a variety of material options such as stainless steel and polycarbonate PC, which can be flexibly selected according to the characteristics of different samples, enhancing the applicability of the equipment to various samples; the overall device has a compact structure, and the fixed brackets enable the stable installation of each component, making it simple and practical to operate, with strong versatility and promotional value. Attached Figure Description
[0015] Figure 1 This is a top view of a semi-automatic anti-pollution powder sample reducing instrument according to the present invention.
[0016] Figure 2 This is a bottom view of a semi-automatic anti-pollution powder sample reducing instrument according to the present invention.
[0017] Figure 3 This is a cross-sectional view of a semi-automatic anti-pollution powder sample reducing instrument according to the present invention.
[0018] Figure 4 This is a schematic diagram of the sample tray, plate, and centrifuge cylinder of this utility model.
[0019] Figure 5 This is a cross-sectional view of the centrifuge cylinder described in this utility model.
[0020] Figure 6 This is a schematic diagram of the flat plate structure described in this utility model.
[0021] Figure 7 This is a schematic diagram of the semi-circular centrifugal sleeve structure described in this utility model.
[0022] Figure 8 This is a schematic diagram of the scraper structure described in this utility model. Detailed Implementation
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:
[0024] Example 1:
[0025] A semi-automatic, pollution-resistant powder sample reduction apparatus includes a housing 01, a top cover 04, a sample tray frame 08, a plate 12, a centrifuge cylinder 15, a toothed disc 17, a fixed support plate 18, ball bearings 19, a semi-circular centrifuge sleeve 22, a scraper 25, and a motor 28. The sample tray 10 is internally connected to the sample tray frame 08. The sample tray 10 has multiple discharge holes 11. The lower part of the sample tray frame 08 has T-shaped grooves 09, with a set of T-shaped grooves 09 distributed along the lower part of the sample tray frame 08. The lower surface of the sample tray frame 08 is in contact with the upper surface of the plate 12. The plate 12 has a T-shaped slider 32, which is symmetrically arranged on the upper part of the plate 12. The T-shaped slider 32 is adapted to the T-shaped groove 09. The T-shaped slider 32 is inserted into the T-shaped groove 09 and slides within the T-shaped groove 09, so that the plate 12 is placed below the sample tray outer frame 08. The plate 12 can slide under the sample tray outer frame 08. The sample tray outer frame 08, sample tray 10, and plate 12 form a detachable reducing plate. The detachable reducing plate innovatively adopts an upper and lower layer structure design: the upper layer is the sample tray 10 with twenty holes, and the lower layer is the pull-out plate 12. The reducing plate is designed as an upper and lower layer structure. The upper layer is processed with twenty evenly distributed through holes according to the twenty-point reduction principle to ensure that the sample can be evenly dispersed; the lower layer is a pull-out plate structure. Through the connection of slide rails and other means, the plate can be quickly pulled out and the sample can be controlled to fall. The flat plate 12 has a flat side plate 13 on its side, and a handle 14 is connected to the side of the flat side plate 13. The scraper 25 is connected to the scraper side block 26, and the scraper side block 26 is symmetrically arranged on both sides of the scraper 25. The outer shell 01 of the box has a strip-shaped sliding hole 05. The scraper side block 26 is adapted to the strip-shaped sliding hole 05 and is inserted into the strip-shaped sliding hole 05. The scraper side block 26 slides in the strip-shaped sliding hole 05. The handle 27 is connected to the strip-shaped insertion hole 06. The side of the outer shell 01 of the box has a clearance hole 02. The scraper 25 is placed on the sample tray. Above the outer frame 08, the scraper 25 is limited by symmetrical scraper side blocks 26. The scraper 25 can be controlled by holding the handle 27 on the outside of the outer shell 01. The scraper 25 is used to manually spread the powder inside the sample tray outer frame 08 to achieve uniform sample distribution. Then, the lower plate 12 is quickly pulled out, and the sample slowly falls into the detachable sample collection tray 30 below like an hourglass. After a suitable amount of sample is collected, the plate 12 is quickly closed, and the sample remaining on the sample tray 10 can also be easily collected and stored.
[0026] Example 2:
[0027] The sample tray outer frame 08 of this utility model is adapted to the outer shell 01 of the box body. The sample tray outer frame 08 is inserted into the outer shell 01 of the box body. The outer shell 08 of the sample tray is connected to the outer shell 01 of the box body. The outer shell 01 of the box body has a strip-shaped insertion hole 06. The flat side plate 13 is adapted to the strip-shaped insertion hole 06 and is inserted into the strip-shaped insertion hole 06. The outer shell 01 of the box body has a lower storage groove 07. The sample collection tray 30 is adapted to the lower storage groove 07 and is inserted into the lower storage groove 07. The sample collection tray 30 is placed below the sample tray 10. The side of the sample collection tray 30 is connected to the second handle 31.
[0028] Example 3:
[0029] The fixed support plate 18 of this utility model is adapted to the outer shell 01 of the box. The fixed support plate 18 is inserted into the outer shell 01 of the box and is connected to the outer shell 01 of the box. The ball bearings 19 are inserted into the fixed support plate 18 and roll inside the fixed support plate 18. The outer side of the centrifuge cylinder 15 has a circular convex ring 20. The upper surface of the ball bearings 19 is in contact with the circular convex ring 20. Multiple balls bearings 19 are evenly distributed between the fixed support plate 18 and the circular convex ring 20. Two sets of fixed support plates 18 and circular convex rings 20 are distributed on the outer side of the centrifuge cylinder 15. The fixed support plate 18 is installed and fixed inside the outer shell 01 of the box. The fixed support plate 18 supports the circular convex ring 20 through multiple balls bearings 19. The fixed support plate 18, the ball bearings 19, and the circular convex ring 20 form a fixed bracket. The fixed bracket, as the core support component, can stably fix the centrifuge cylinder 15 and ensure stable operation of the centrifugation operation.
[0030] Example 4:
[0031] The outer shell 01 of this utility model is connected to the upper cover 04. The lower surface of the upper cover 04 is in contact with the upper surface of the centrifuge cylinder 15. The centrifuge cylinder 15 has a strip-shaped limiting block 16 inside. A set of strip-shaped limiting blocks 16 are symmetrically arranged inside the centrifuge cylinder 15. The semi-circular centrifuge sleeve 22 is adapted to the centrifuge cylinder 15 and is inserted into the centrifuge cylinder 15. The bottom of the centrifuge cylinder 15 has a lower hole 21. The bottom of the semi-circular centrifuge sleeve 22 has a lower tube 24. The lower tube 24 is adapted to the lower hole 21 and is inserted into the lower hole 21. A set of semi-circular centrifuge sleeves 22 are symmetrically arranged inside the centrifuge cylinder 15. The rubber sleeve 33 is inserted into the lower tube 24 and blocks the lower part of the lower tube 24 to prevent powder from falling. After the centrifugation device has completed the mixing, the rubber sleeve 33 is opened and the sample falls into the upper sample tray 10.
[0032] Example 5:
[0033] The semicircular centrifuge sleeve 22 of this invention has a side sliding groove 23 on its outer side. A strip-shaped limiting block 16 is adapted to the side sliding groove 23 and is inserted into the side sliding groove 23. The strip-shaped limiting block 16 axially positions the semicircular centrifuge sleeve 22, so that the symmetrical semicircular centrifuge sleeves 22 are aligned and placed inside the centrifuge cylinder 15. This detachable structural design allows for the selection of materials such as stainless steel or polycarbonate (PC) to make the semicircular centrifuge sleeve 22 according to different sample characteristics. A standardized interface is designed so that it can fit tightly with the inner wall of the centrifuge device and is easy to assemble and disassemble, meeting the needs of cyclic use or single use. The outer shell 01 of the box has a side relief cavity 03 on its side. The ball bearing 19 is inserted into the side relief cavity 03. The motor mounting plate 29 is connected to the side relief cavity 03. The motor 28 is connected to the motor mounting plate 29. The shaft of the motor 28 is connected to the gear plate 17. The gear plate 17 meshes with the outer teeth of the centrifuge cylinder 15. The motor 28 is installed and fixed inside the outer shell 01 of the box. The gear plate 17 can mesh with the outer teeth of the centrifuge cylinder 15, so that when the motor 28 is working, it controls the centrifuge cylinder 15 to rotate through the gear plate 17. The rotation of the centrifuge cylinder 15 performs centrifugal mixing operation on the powder inside.
[0034] Installation steps: First, insert the T-shaped slider 32 into the T-shaped groove 09, insert the sample tray outer frame 08 into and connect it to the outer shell 01, connect the flat side plate 13 to the first handle 14, connect the sample collection tray 30 to the second handle 31, insert the sample collection tray 30 into the lower storage groove 07, insert the fixed support plate 18 into and connect it to the outer shell 01, insert the ball bearing 19 into the fixed support plate 18, insert the centrifuge cylinder 15 into the outer shell 01, pass the centrifuge cylinder 15 through the fixed support plate 18, connect the motor 28 to the motor mounting plate 29, connect the motor 28 to the gear plate 17, mesh the gear plate 17 with the outer teeth of the centrifuge cylinder 15, connect the upper cover 04 to the upper part of the outer shell 01, insert the semi-circular centrifuge sleeve 22 into the centrifuge cylinder 15, insert the strip-shaped limiting block 16 into the side groove 23 of the centrifuge sleeve, insert the lower tube 24 of the centrifuge sleeve into the lower hole 21 of the centrifuge cylinder, and insert the rubber sleeve 33 into the lower tube 24 of the centrifuge sleeve.
[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A semi-automatic, anti-contamination powder sample reduction instrument, characterized in that: The system includes a casing (01), a top cover (04), a sample tray frame (08), a flat plate (12), a centrifuge cylinder (15), a toothed disc (17), a fixed support plate (18), ball bearings (19), a semi-circular centrifuge sleeve (22), a scraper (25), and a motor (28). The sample tray frame (08) is internally connected to the sample tray (10). The sample tray (10) has multiple discharge holes (11). The lower part of the sample tray frame (08) has a T-shaped groove (09). A set of T-shaped grooves (09) are distributed in the lower part of the sample tray frame (08). The lower surface of the sample tray frame (08) is in contact with the upper surface of the flat plate (12). The upper part of the flat plate (12) has a T-shaped slider (32). The T-shaped sliders (32) are symmetrically arranged in the upper part of the flat plate (12). (32) Adapted to the T-shaped slide (09), the T-shaped slider (32) is inserted into the T-shaped slide (09), and the T-shaped slider (32) slides in the T-shaped slide (09). The side of the flat plate (12) has a flat plate side plate (13), and the side of the flat plate side plate (13) is connected to the first handle (14). The scraper (25) is connected to the scraper side block (26), and the scraper side block (26) is symmetrically arranged on both sides of the scraper (25). The outer shell of the box (01) has a strip-shaped sliding hole (05), and the scraper side block (26) is adapted to the strip-shaped sliding hole (05). The scraper side block (26) is inserted into the strip-shaped sliding hole (05), and the scraper side block (26) slides in the strip-shaped sliding hole (05). The handle (27) is connected to the strip-shaped insertion hole (06), and the side of the outer shell of the box (01) has a clearance hole (02).
2. The semi-automatic anti-contamination powder sample reduction instrument according to claim 1, characterized in that: The sample tray outer frame (08) is adapted to the outer shell of the box (01). The sample tray outer frame (08) is inserted into the outer shell of the box (01). The sample tray outer frame (08) is connected to the outer shell of the box (01). The outer shell of the box (01) has a strip-shaped insertion hole (06). The flat side plate (13) is adapted to the strip-shaped insertion hole (06). The flat side plate (13) is inserted into the strip-shaped insertion hole (06). The outer shell of the box (01) has a lower storage groove (07). The sample collection tray (30) is adapted to the lower storage groove (07). The sample collection tray (30) is inserted into the lower storage groove (07). The sample collection tray (30) is placed below the sample tray (10). The side of the sample collection tray (30) is connected to the second handle (31).
3. A semi-automatic anti-contamination powder sample reduction instrument according to claim 2, characterized in that: The fixed support plate (18) is adapted to the outer shell (01) of the box. The fixed support plate (18) is inserted into the outer shell (01) of the box. The fixed support plate (18) is connected to the outer shell (01). The ball (19) is inserted into the fixed support plate (18). The ball (19) rolls inside the fixed support plate (18). The centrifuge cylinder (15) has a circular convex ring (20) on the outside. The upper surface of the ball (19) is in contact with the circular convex ring (20). Multiple balls (19) are evenly distributed between the fixed support plate (18) and the circular convex ring (20). Two sets of fixed support plates (18) and circular convex rings (20) are distributed on the outside of the centrifuge cylinder (15).
4. A semi-automatic anti-contamination powder sample reduction instrument according to claim 1, characterized in that: The upper part of the outer shell (01) of the box is connected to the upper cover (04). The lower surface of the upper cover (04) is in contact with the upper surface of the centrifuge cylinder (15). The centrifuge cylinder (15) has a strip-shaped limiting block (16) inside. A set of strip-shaped limiting blocks (16) are symmetrically arranged inside the centrifuge cylinder (15). The semi-circular centrifuge sleeve (22) is adapted to the centrifuge cylinder (15). The semi-circular centrifuge sleeve (22) is inserted into the centrifuge cylinder (15). The bottom of the centrifuge cylinder (15) has a centrifuge cylinder lower hole (21). The bottom of the semi-circular centrifuge sleeve (22) has a centrifuge sleeve lower tube (24). The centrifuge sleeve lower tube (24) is adapted to the centrifuge cylinder lower hole (21). The centrifuge sleeve lower tube (24) is inserted into the centrifuge cylinder lower hole (21). A set of semi-circular centrifuge sleeves (22) are symmetrically arranged inside the centrifuge cylinder (15). The rubber sleeve (33) is inserted into the centrifuge sleeve lower tube (24).
5. A semi-automatic anti-contamination powder sample reduction instrument according to claim 1, characterized in that: The semi-circular centrifugal sleeve (22) has a centrifugal sleeve side slide groove (23) on the outside. The strip-shaped limiting block (16) is adapted to the centrifugal sleeve side slide groove (23). The strip-shaped limiting block (16) is inserted into the centrifugal sleeve side slide groove (23). The outer shell (01) of the box has a side relief cavity (03) on the side. The ball (19) is inserted into the side relief cavity (03). The motor mounting plate (29) is connected to the side relief cavity (03). The motor (28) is connected to the motor mounting plate (29). The motor (28) shaft is connected to the gear plate (17). The gear plate (17) meshes with the outer teeth of the centrifugal cylinder (15).