Pesticide residue detection and analysis device

Abstract

The utility model provides a pesticide residue detection and analysis device which comprises a device body, a shell and a crushing chamber located in the shell are arranged on the device body, a crushing roller set is arranged in the crushing chamber, and a material guide pipe is fixedly connected to the outer wall of the crushing chamber. The top of the material guiding pipe is fixedly connected with a coaxial feeding pipe with the inner hole diameter smaller than the inner hole diameter of the material guiding pipe, and the top of the feeding pipe penetrates through and is axially connected with a transmission shaft in a sliding mode. A material guide pipe is connected to the outer wall of a crushing chamber, one end of the material guide pipe is connected with a feeding pipe, the outer wall of the feeding pipe is connected with a pressure pipe, then a sealing disc capable of axially sliding is arranged in the feeding pipe, and when an inner cavity of the crushing chamber needs to be cleaned, the sealing disc is controlled to move upwards to a limiting position, and then high-pressure water is injected into the crushing chamber through the pressure pipe; and when the high-pressure water body flows through the crushing chamber, residues in the crushing chamber can be effectively flushed, so that the accuracy of drug residue detection is improved.

Description

Technical Field

[0001] This utility model relates to the field of pesticide residue detection technology, specifically a pesticide residue detection and analysis device. Background Technology

[0002] The development of agricultural industrialization has led to an increasing reliance on exogenous substances such as pesticides, antibiotics, and hormones in vegetable production. In my country, pesticide use in vegetables remains high, and the irrational use of these substances inevitably results in excessive pesticide residues in vegetables, affecting consumer safety and, in severe cases, causing illness, developmental abnormalities, or even direct poisoning and death. Pesticide residue detection requires analytical instruments.

[0003] Utility model CN213398179U discloses a pesticide residue detection and analysis device for wild fungi, including a shell and an analysis mechanism. A dosing port is provided on the side of the shell between the slag discharge pipe and the liquid discharge pipe. A sealing cover is horizontally provided on the upper part of the front surface of the shell on the side of the voice prompt device. A crushing chamber is provided on the inner wall of the shell below the sealing cover. The analysis mechanism includes a crushing roller, a solid-liquid separator, a catalytic tank, and a spectrophotometer. A driven roller is horizontally provided on the inner wall of the crushing chamber on the side of the crushing roller. The spectrophotometer is horizontally positioned on the front surface of the shell at the end away from the sealing cover. This utility model utilizes a variable frequency motor to control the rotation of the crushing roller to cooperate with the driven roller to complete the crushing operation. After crushing, the fungal material undergoes separation and extraction of the fungal liquid in the solid-liquid separator, and after catalytic reaction in the catalytic tank, it is transported to the detection tube of the spectrophotometer for pesticide concentration analysis.

[0004] However, the above-mentioned existing technology still has shortcomings in use: the above-mentioned analytical device is equipped with a pulverizing chamber, which is equipped with a pulverizing roller and a driven roller. The outer periphery of the pulverizing roller and the driven roller is equipped with pulverizing teeth (spiral shape). However, the pulverizing chamber is a major area for sample residue, especially for the detection of pesticide residues in vegetables. For example, vegetable fragments are easily adsorbed on the inner wall of the pulverizing chamber, the sides of the pulverizing teeth, and the peripheral walls of the pulverizing roller and the driven roller. Such residues are numerous and inconvenient to clean. If they are not effectively cleaned, they will easily affect the accuracy of the next detection and analysis.

[0005] Therefore, this utility model provides a pesticide residue detection and analysis device. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pesticide residue detection and analysis device to solve the problems mentioned in the background technology. This utility model has the function of convenient cleaning of the crushing chamber, so that the residues in the crushing chamber can be effectively discharged, thereby improving the accuracy of pesticide residue detection and analysis.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a pesticide residue detection and analysis device, comprising a device body, an outer shell and a pulverizing chamber located within the outer shell, a pulverizing roller assembly within the pulverizing chamber, a guide pipe fixedly connected to the outer wall of the pulverizing chamber, a coaxial feeding pipe with an inner diameter smaller than that of the guide pipe fixedly connected to the top of the guide pipe, a drive shaft slidably connected through the top of the feeding pipe, a sealing plate that seals with the feeding pipe fixedly connected to the bottom of the drive shaft, and the drive shaft driving the sealing plate into the guide pipe when it moves axially, and a pressure pipe fixedly connected near the top of the feeding pipe to the outer peripheral wall of the feeding pipe.

[0008] Furthermore, the top of the feeding pipe penetrates the top wall of the outer casing and is welded with a crossbeam, and a guide sleeve fitted outside the drive shaft is fixedly connected to the middle of the crossbeam.

[0009] Furthermore, a limiting ring located above the guide sleeve is fixedly sleeved on the drive shaft.

[0010] Furthermore, a baffle is welded to the top of the drive shaft, and a handle is welded to the top of the baffle.

[0011] Furthermore, a coaxial truncated cone is fixedly connected to the top of the sealing plate, with the small end of the truncated cone facing upwards.

[0012] Furthermore, the outer periphery of the sealing disc is fitted with a sealing rubber sleeve.

[0013] Furthermore, the outer wall of the crushing chamber is fixedly connected to at least two drain pipes distributed along the axial direction of the crushing roller assembly.

[0014] Furthermore, one end of the drain pipe extends to the outside of the outer casing and is screwed with a cap, and a stopper rod that seals with the drain pipe is fixedly connected to the inside of the cap.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. In this utility model, a guide pipe is connected to the outer wall of the grinding chamber, one end of the guide pipe is connected to a feeding pipe, and the outer wall of the feeding pipe is connected to a pressure pipe. Then, a sealing plate that can slide axially is set in the feeding pipe. When it is necessary to clean the inner cavity of the grinding chamber, the sealing plate is controlled to move upward to the limit position, and then high-pressure water is injected into the grinding chamber through the pressure pipe. When the high-pressure water flows through the grinding chamber, it can effectively wash away the residues in the grinding chamber, thereby improving the accuracy of drug residue detection.

[0017] 2. In this utility model, the inner diameter of the guide tube is larger than the inner diameter of the feed tube. When the sealing plate is located in the guide tube, the sample can be put into the crushing chamber through the feed tube. A transmission shaft that slides and cooperates with the feed tube is set on the top of the sealing plate. By pulling the transmission shaft up and down, the sealing plate can be driven to move up and down in the guide tube, which has the advantage of pressing the sample to accelerate crushing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a pesticide residue detection and analysis device according to the present invention;

[0019] Figure 2 This is a schematic diagram of the pulverizing chamber of a pesticide residue detection and analysis device according to this utility model;

[0020] Figure 3 for Figure 2 A diagram at the bottom;

[0021] Figure 4 This is a plan view showing the cooperation between the sealing plate and the drive shaft of a pesticide residue detection and analysis device according to this utility model.

[0022] In the diagram: 1. Main body of the device; 11. Outer shell; 12. Crushing chamber; 13. Crushing roller assembly; 2. Feed guide pipe; 3. Feeding pipe; 31. Crossbeam; 311. Guide sleeve; 4. Drive shaft; 41. Limiting ring; 42. Baffle plate; 421. Handle; 5. Sealing plate; 51. Frustum; 52. Sealing sleeve; 6. Pressure pipe; 7. Drain pipe; 8. Cover; 81. Stopper rod. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a pesticide residue detection and analysis device, including a device body 1, a shell 11 and a crushing chamber 12 located inside the shell 11 on the device body 1, a crushing roller group 13 is provided in the crushing chamber 12, and the structure on the device body 1 for pesticide residue detection adopts the structure in the patent literature mentioned in the background art, which will not be described again in this application.

[0025] In this technical solution, the crushing chamber 12 is a cylindrical structure. A guide pipe 2 is fixedly connected to the outer wall of the crushing chamber 12. The guide pipe 2 is located at the top of the crushing chamber 12. A coaxial feeding pipe 3 with an inner diameter smaller than that of the guide pipe 2 is fixedly connected to the top of the guide pipe 2. Preferably, the top of the feeding pipe 3 penetrates the top wall of the outer shell 11. The feeding pipe 3 is the channel for conveying the sample into the crushing chamber 12. In use, the vegetable sample to be tested is put into the top opening of the feeding pipe 3 and then falls down. After being expanded and transferred by the guide pipe 2, it enters the crushing chamber 12. When the crushing roller group 13 is running, it will crush the sample.

[0026] A drive shaft 4 is axially slidably connected through the top of the feeding pipe 3. Specifically, a crossbeam 31 is welded to the top of the feeding pipe 3, and a guide sleeve 311, which is sleeved on the outside of the drive shaft 4, is fixedly connected to the middle of the crossbeam 31. A sealing disc 5, which seals against the feeding pipe 3, is fixedly connected to the bottom of the drive shaft 4. In practice, a sealing sleeve 52 can be fixedly fitted around the outer periphery of the sealing disc 5. When the sealing disc 5 enters the feeding pipe 3, the sealing sleeve 52 acts to seal against water leakage. When the drive shaft 4 moves axially, it can drive the sealing disc 5 into the guide pipe 2. When the sealing disc 5 enters the guide pipe 2, an annular feeding channel is formed between its outer periphery and the inner wall of the guide pipe 2. This feeding channel is the channel for the sample to enter the crushing chamber 12. When the sealing disc 5 is controlled to move up and down in the guide pipe 2, the lower end face of the sealing disc 5 will press the sample above the crushing roller group 13, thereby accelerating the crushing process. Among them, the top of the sealing plate 5 is fixedly connected to a coaxial truncated cone 51, with the small end of the truncated cone 51 facing upwards. The conical surface on the truncated cone 51 can effectively prevent sample accumulation.

[0027] In this technical solution, a pressure pipe 6 is fixedly connected to the outer peripheral wall of the feeding pipe 3 near the top. The pressure pipe 6 is located outside the outer shell 11. When the sealing plate 5 moves upward to the top of the feeding pipe 3, the top opening of the feeding pipe 3 is blocked. At this time, the pressure pipe 6 and the space below the sealing plate 5 inside the feeding pipe 3 are connected. When it is necessary to clean the inner cavity of the crushing chamber 12, the pressure pipe 6 is connected to an external circulating water pump through a pipe joint. Water at a certain pressure will enter the crushing chamber 12, and the water will flush the crushing chamber 12. The flushing water will be discharged through the drain pipe on the main body 1, thus forming a flushing inlet and outlet water path, which can effectively remove the residue in the crushing chamber 12.

[0028] In this embodiment, a limiting ring 41 is fixedly sleeved on the drive shaft 4 above the guide sleeve 311. The function of the limiting ring 41 is to restrict the downward position of the drive shaft 4 and prevent the sealing disc 5 from touching the crushing teeth on the crushing roller group 13.

[0029] In this embodiment, a baffle 42 is welded to the top of the drive shaft 4, and a handle 421 is welded to the top of the baffle 42. The handle 421 is used to facilitate the operator to hold and control the up and down movement of the drive shaft 4.

[0030] In this technical solution, at least two drain pipes 7 are fixedly connected to the outer wall of the crushing chamber 12, which are distributed along the axial direction of the crushing roller group 13. The function of the drain pipes 7 is to directly discharge the washing material in the crushing chamber 12, which increases the flow rate of the liquid passing through the crushing chamber 12, improves the washing force, and greatly improves the washing efficiency of the crushing chamber 12.

[0031] Furthermore, one end of the drain pipe 7 extends to the outside of the outer casing 11 and is screwed with a cap 8. A stopper rod 81, which seals with the drain pipe 7, is fixedly connected to the inside of the cap 8. In use, a rubber ring can be fixedly fitted onto the stopper rod 81 at one end of the cap 8. The stopper rod 81 serves to fill and block the inner cavity of the drain pipe 7, preventing some large-volume crushed materials from clogging the drain pipe 7 during the crushing process of the crushing roller group 13 in the crushing chamber 12.

[0032] Working principle: When sample residue appears in the crushing chamber 12, manually hold the handle 421 and lift it up. The drive shaft 4 drives the sealing plate 5 to move upward. The sealing plate 5 enters the top of the feeding pipe 3, and then high-pressure water is injected into the pressure pipe 6. Manually unscrew the cover 8 and pull out the stopper 81 from the drain pipe 7. The water enters the feeding pipe 3 and the guide pipe 2 and then enters the crushing chamber 12. It is then discharged through the drain pipe 7. The high-speed flowing water will wash the inner wall of the crushing chamber 12 and the outer surface of the crushing roller assembly 13, thereby carrying away the residue. During this process, the operation of the crushing roller assembly 13 can be controlled to improve the cleaning efficiency.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pesticide residue detection and analysis device, comprising a device body (1), wherein a shell (11) and a pulverizing chamber (12) are disposed on the device body (1), and a pulverizing roller assembly (13) is disposed within the shell (11), characterized in that, The outer wall of the crushing chamber (12) is fixedly connected to a guide pipe (2). The top of the guide pipe (2) is fixedly connected to a coaxial feeding pipe (3) with an inner diameter smaller than that of the guide pipe (2). The top of the feeding pipe (3) is slidably connected to a drive shaft (4). The bottom of the drive shaft (4) is fixedly connected to a sealing plate (5) that seals with the feeding pipe (3). When the drive shaft (4) moves axially, it can drive the sealing plate (5) into the guide pipe (2). The outer peripheral wall of the feeding pipe (3) is fixedly connected to a pressure pipe (6) near the top.

2. The pesticide residue detection and analysis device according to claim 1, characterized in that: The top of the feeding pipe (3) penetrates the top wall of the outer shell (11) and is welded with a crossbeam (31). A guide sleeve (311) sleeved on the outside of the transmission shaft (4) is fixedly connected to the middle of the crossbeam (31).

3. The pesticide residue detection and analysis device according to claim 2, characterized in that: A limiting ring (41) is fixedly sleeved on the drive shaft (4) above the guide sleeve (311).

4. The pesticide residue detection and analysis device according to claim 1, characterized in that: A baffle (42) is welded to the top of the drive shaft (4), and a handle (421) is welded to the top of the baffle (42).

5. The pesticide residue detection and analysis device according to claim 1, characterized in that: The top of the sealing plate (5) is fixedly connected to a coaxial truncated cone (51), with the small end of the truncated cone (51) facing upward.

6. The pesticide residue detection and analysis device according to claim 1, characterized in that: The outer periphery of the sealing plate (5) is fixedly fitted with a sealing sleeve (52).

7. The pesticide residue detection and analysis device according to claim 1, characterized in that: The outer wall of the crushing chamber (12) is fixedly connected to at least two drain pipes (7) distributed along the axial direction of the crushing roller group (13).

8. The pesticide residue detection and analysis device according to claim 7, characterized in that: One end of the drain pipe (7) extends to the outside of the outer shell (11) and is screwed with a cap (8). The inner side of the cap (8) is fixedly connected with a stopper (81) that seals with the drain pipe (7).

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