A device for screening of samples for pesticide residues in food crops
The device features a quick-change sample sieve via a pressure ring and locking mechanism, combined with a conical hopper and partition plate design. This solves the problem of complex sieve replacement in existing devices and improves the durability and ease of operation of the sample sieving device for pesticide residue testing of grain crops.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 天津市农业生态环境监测与农产品质量检测中心(天津市农业机械质量鉴定中心天津市农药兽药检定中心)
- Filing Date
- 2025-08-25
- Publication Date
- 2026-07-21
AI Technical Summary
In existing sieving devices for pesticide residue testing of grain crops, the complex replacement of sieves and frequent disassembly and assembly result in insufficient durability and flexibility of the devices.
The sample sieve is fixed by a pressure ring and locking structure, and its movement is restricted by a limiting ring and a cover, enabling quick replacement of the sample sieve; the cylinder is equipped with a conical hopper and a partition plate, and the sample trough can be slidably connected for quick replacement; the vibration motor transmits vibration through springs and connecting plates to promote sieving and mixing.
It enables quick replacement of sample sieves and sample cells, improving the durability and flexibility of the device, and enhancing screening efficiency and convenience.
Smart Images
Figure CN224535559U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screening technology, and in particular to a screening device for pesticide residue test samples of grain crops. Background Technology
[0002] In the detection of pesticide residues in grain crops, sample sieving is one of the key pretreatment steps. Traditional sieving devices are typically used to separate grain samples according to particle size for subsequent pesticide residue analysis. The efficiency and convenience of this step directly affect the usability of the sieving device. Therefore, an easy-to-operate and structurally sound design is crucial for improving the reliability of the sieving device.
[0003] Existing sieving devices for pesticide residue testing of grain crops typically employ a fixed sieve structure, with the sieve fixed inside the sieving cylinder by bolts or slots. During sieving, the sample is separated on the sieve by vibration or manual shaking, and the undersized material falls into a collection container. These devices usually rely on mechanical vibration or manual operation to complete the sieving process.
[0004] However, existing sieving devices suffer from complex sample sieve replacement issues during practical use. Since sieves are typically bolted or embedded, replacing sieves of different sizes requires disassembling multiple parts, making the process cumbersome and time-consuming. Furthermore, frequent disassembly and assembly lead to wear on the fixed structure, affecting the device's durability. These problems limit the flexibility and long-term reliability of sieving devices and urgently require improvement. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a sieving device for pesticide residue testing of grain crops, aiming to improve the problem of complicated sample sieve replacement in traditional sieving devices for pesticide residue testing of grain crops.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sieving device for pesticide residue test samples of grain crops, comprising a base three, a cylinder fixedly connected to the top of the base three, a sample sieve provided on the top of the cylinder, and a fixing component provided on the top of the sample sieve.
[0007] The fixing component includes a pressure ring, which is disposed on the top of the sample sieve. An upper locking buckle is fixedly connected to the outer wall of the pressure ring, and a lower locking buckle is fixedly connected to the outer wall of the cylinder. The top of the lower locking buckle is slidably connected to the outer wall of the upper locking buckle.
[0008] As a further description of the above technical solution:
[0009] A limiting ring is fixedly connected to the outer wall of the pressure ring, and a cover is provided on the top of the limiting ring.
[0010] As a further description of the above technical solution:
[0011] A conical hopper is fixedly connected inside the cylinder, and a partition plate is fixedly connected inside the conical hopper.
[0012] As a further description of the above technical solution:
[0013] A sample slot is provided at the bottom of the partition plate, the sample slot is slidably connected to the top of the base, and a handle is fixedly connected to the outer wall of the sample slot.
[0014] As a further description of the above technical solution:
[0015] A fixed cylinder is fitted on the outer wall of the cylinder, and a spring is fixedly connected to the outer wall of the fixed cylinder. A connecting plate is fixedly connected to one end of the spring, and a base is fixedly connected to the bottom of the connecting plate.
[0016] As a further description of the above technical solution:
[0017] A vibration motor is fixedly connected to the bottom of the second base, and a support leg is also fixedly connected to the bottom of the second base.
[0018] As a further description of the above technical solution:
[0019] A shock-absorbing plate is fixedly connected to the bottom of the support leg, and a base is fixedly connected to the bottom of the shock-absorbing plate.
[0020] This utility model has the following beneficial effects:
[0021] 1. In this utility model, the sample sieve is first placed on the top of the cylinder, and then the pressure ring is placed on the top of the sample sieve. The lower locking buckle fixed on the outer wall of the cylinder is fastened to the upper locking buckle on the outer wall of the pressure ring, thereby fixing the sample sieve. Similarly, the sample sieve can be removed by removing the lower locking buckle from the upper locking buckle, which achieves the function of quickly replacing the sample sieve. This solves the problem of complicated sample sieve replacement in traditional grain crop pesticide residue test sample sieving devices and improves the durability of grain crop pesticide residue test sample sieving devices.
[0022] 2. In this utility model, a conical hopper is fixed inside the cylinder, and a partition plate is fixed inside the conical hopper. Multiple sample slots are provided below the partition plate, and the sample slots can slide on the top of the base. By using the handle on the outer wall of the sample slot, the sample slot can be pulled out of the cylinder, which achieves the function of quickly replacing the sample slot. This solves the problem that the traditional grain crop pesticide residue test sample screening device cannot replace the sample slot, and improves the practicality of the grain crop pesticide residue test sample screening device. Attached Figure Description
[0023] Figure 1This is a perspective view of a sample sieving device for pesticide residue testing of grain crops proposed in this utility model;
[0024] Figure 2 This is a schematic diagram of the installation of a sample sieve for a sample sieving device for pesticide residue testing of grain crops, as proposed in this utility model.
[0025] Figure 3 This is a schematic diagram of the structure of a separator plate for a sample sieving device for pesticide residue testing of grain crops, as proposed in this utility model.
[0026] Figure 4 This is a front view of a sample sieving device for pesticide residue testing of grain crops proposed in this utility model;
[0027] Figure 5 This is a schematic diagram of the structure of a vibration motor for a sample sieving device for pesticide residue testing of grain crops, as proposed in this utility model.
[0028] Legend:
[0029] 1. Base 1; 2. Shock-absorbing plate; 3. Support leg; 4. Connecting plate; 5. Cover; 6. Pressure ring; 7. Base 2; 8. Limiting ring; 9. Sample sieve; 10. Cylinder; 11. Lower locking buckle; 12. Upper locking buckle; 13. Base 3; 14. Handle; 15. Sample slot; 16. Divider plate; 17. Conical hopper; 18. Vibration motor; 19. Spring; 20. Fixing cylinder. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] Reference Figures 1-2 An embodiment of this utility model is provided: a sieving device for pesticide residue test samples of grain crops, including a base 13, a cylinder 10 fixedly connected to the top of the base 13, a sample sieve 9 provided on the top of the cylinder 10, the sample sieve 9 being used to sieve grain crop samples, and a fixing component provided on the top of the sample sieve 9.
[0032] The fixing assembly includes a pressure ring 6, which is set on top of the sample sieve 9. An upper locking buckle 12 is fixedly connected to the outer wall of the pressure ring 6, and a lower locking buckle 11 is fixedly connected to the outer wall of the cylinder 10. The top of the lower locking buckle 11 is slidably connected to the outer wall of the upper locking buckle 12. The sample sieve 9 is placed on top of the cylinder 10, and then the pressure ring 6 is placed on top of the sample sieve 9. Next, the lower locking buckle 11 on the outer wall of the cylinder 10 is fastened to the upper locking buckle 12 on the outer wall of the pressure ring 6, thereby fixing the sample sieve 9 by the pressure ring 6 and the cylinder 10. Similarly, the sample sieve 9 can be removed by removing the lower locking buckle 11.
[0033] Reference Figures 1-5 A limiting ring 8 is fixedly connected to the outer wall of the pressure ring 6. A cover 5 is provided on the top of the limiting ring 8. The cover 5 is placed on the top of the pressure ring 6 and is restricted from moving by the limiting ring 8 on the outer wall of the pressure ring 6, thereby achieving the effect of being fitted on the top of the cylinder 10, thus isolating the sieving environment of the sample. A conical hopper 17 is fixedly connected inside the cylinder 10, and a partition plate 16 is fixedly connected inside the conical hopper 17. When the cover 5 is opened, the pesticide residue test sample of the grain crop is put from the pressure ring 6 onto the sample sieve 9. It falls into the conical hopper 17 through sieving and is fully mixed due to the star-chasing design of the conical hopper 17, and then falls randomly into the partition plate 16. A sample slot 15 is provided at the bottom of the separator plate 16. The sample slot 15 is slidably connected to the top of the base 13. A handle 14 is fixedly connected to the outer wall of the sample slot 15. The sample, after being sieved by the sample sieve 9 and mixed evenly by the conical hopper 17, falls into the sample slot 15 for storage after being randomly distributed by the separator plate 16. The sample slot 15 can be pulled out of the outer wall of the cylinder 10 by the handle 14, so that the sample can be further tested. The sample slot 15 can also be quickly replaced. A fixing cylinder 20 is sleeved on the outer wall of the cylinder 10. A spring 19 is fixedly connected to the outer wall of the fixing cylinder 20. A connecting plate 4 is fixedly connected to one end of the spring 19. The base 7 is fixedly connected to the bottom of the connecting plate 4. A vibration motor 18 is fixedly connected to the bottom of base 2 7. Starting the vibration motor 18 causes base 2 7 to vibrate, which in turn drives the connecting plate 4 to vibrate. This vibration is transmitted through the spring 19, causing the fixed cylinder 20 to vibrate, which in turn causes the cylinder 10 fitted within the fixed cylinder 20 to vibrate. This facilitates the sieving of samples by the sample sieve 9, and the mixing and random distribution of samples by the conical hopper 17 and the partition plate 16. A support leg 3 is fixedly connected to the bottom of base 2 7. A shock-absorbing plate 2 is fixedly connected to the bottom of the support leg 3. Base 1 is fixedly connected to the bottom of the shock-absorbing plate 2. Base 1 and the shock-absorbing plate 2 serve to support the device, and the shock-absorbing plate 2 mitigates the vibration generated by the vibration motor 18.
[0034] Working principle: Place the sample sieve 9 on top of the cylinder 10, and place the pressure ring 6 on top of the sample sieve 9. Secure the sample sieve 9 by fastening the lower locking buckle 11 on the outer wall of the cylinder 10 to the upper locking buckle 12 on the outer wall of the pressure ring 6. Then, insert the cylinder 10 into the cylinder 10 and insert the sample slot 15 into the bottom of the cylinder 10. Open the lid 5, place the sample to be mixed for pesticide residue testing of grain crops into the pressure ring 6, and then close the lid 5.
[0035] Turn on the vibration motor 18 to make the base 7 vibrate, and transmit the vibration to the fixed cylinder 20 through the connecting plate 4 and the spring 19, which in turn drives the cylinder 10 to vibrate, thereby promoting the sieving of the sample by the sample sieve 9, and also speeding up the mixing of the sample by the conical bucket 17 and the random distribution of the sample by the separator 16. The sample that has been sieved, mixed and distributed will fall into the sample trough 15 for subsequent testing operations.
Claims
1. A sieving device for pesticide residue testing samples of grain crops, comprising a base three (13), characterized in that: The top of the base (13) is fixedly connected to a cylinder (10), the top of the cylinder (10) is provided with a sample sieve (9), and the top of the sample sieve (9) is provided with a fixing component. The fixing component includes a pressure ring (6), which is set on the top of the sample sieve (9). An upper locking buckle (12) is fixedly connected to the outer wall of the pressure ring (6), and a lower locking buckle (11) is fixedly connected to the outer wall of the cylinder (10). The top of the lower locking buckle (11) is slidably connected to the outer wall of the upper locking buckle (12).
2. The sieving device for pesticide residue testing samples of grain crops according to claim 1, characterized in that: The outer wall of the pressure ring (6) is fixedly connected to a limiting ring (8), and a cover (5) is provided on the top of the limiting ring (8).
3. The sieving device for pesticide residue testing samples of grain crops according to claim 1, characterized in that: A conical bucket (17) is fixedly connected inside the cylinder (10), and a partition plate (16) is fixedly connected inside the conical bucket (17).
4. The sieving device for pesticide residue testing samples of grain crops according to claim 3, characterized in that: The bottom of the partition plate (16) is provided with a sample groove (15), the sample groove (15) is slidably connected to the top of the base three (13), and a handle (14) is fixedly connected to the outer wall of the sample groove (15).
5. A sieving device for pesticide residue testing samples of grain crops according to claim 4, characterized in that: The outer wall of the cylinder (10) is fitted with a fixed cylinder (20), and a spring (19) is fixedly connected to the outer wall of the fixed cylinder (20). One end of the spring (19) is fixedly connected to a connecting plate (4), and the bottom of the connecting plate (4) is fixedly connected to a base (7).
6. The sieving device for pesticide residue testing samples of grain crops according to claim 5, characterized in that: The bottom of the second base (7) is fixedly connected to a vibration motor (18), and the bottom of the second base (7) is fixedly connected to a support leg (3).
7. A sieving device for pesticide residue testing samples of grain crops according to claim 6, characterized in that: The bottom of the support leg (3) is fixedly connected to a shock-absorbing plate (2), and the bottom of the shock-absorbing plate (2) is fixedly connected to a base (1).