Food safety detection device and method thereof

Abstract

The invention relates to the technical field of food safety detection, and particularly discloses a food safety detection device which comprises a box body, a collecting box, a first clamping mechanism, a second clamping mechanism and a freezing mechanism, the first clamping mechanism and the second clamping mechanism are arranged in the box body and are symmetrically arranged, an extracting solution is poured into the collecting box, the top of the collecting box communicates with a liquid inlet pipe, and the top of the collecting box communicates with a liquid outlet pipe; the bottom of the collecting box is communicated with a liquid discharging pipe, agricultural products can be placed in the collecting box to be soaked in an extracting solution, when pesticide residues in green onions are detected, the green onions are placed between the first roller and the second roller, then the first sealing shell and the second sealing shell are driven by the shifting mechanism to get close to each other, and the pesticide residues in the green onions are detected. And the freezing blocks in the sealing shell I and the sealing shell II are in contact with the upper end part of the green onion, so that the upper end part of the green onion is frozen and frozen, and the situation that wound surface liquid at the end part of the green onion flows out to cause interference on a detection result is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of food safety detection, and particularly relates to a food safety detection device and a method thereof. Background Art

[0002] The current cultivation of the food raw material scallions increasingly relies on exogenous substances such as pesticides. The detection of food pesticide residues can be carried out through sample processing techniques and detection methods. In the extraction method of pesticide residues in food for food pesticide residue detection, the extraction methods adopted according to different samples are: dipping method, rinsing method, shaking method, etc. When extracting samples by soaking to leach out pesticide residues and the like, there are many interfering substances. When agricultural products are soaked in the extraction solution, the impurities at the end of the scallions are likely to affect the detection results. If there are many cut surfaces on the scallions and there is liquid flowing out from the cut surfaces of the scallions, it will also affect the detection results. Therefore, a food safety detection device is needed. Summary of the Invention

[0003] To solve the deficiencies of the prior art, the purpose of the present invention is to provide a food safety detection device and a method thereof.

[0004] To achieve the above technical purpose, the technical solutions adopted by the present invention are as follows.

[0005] A food safety detection device, which includes:

[0006] A box body, a collection box, a first clamping mechanism, a second clamping mechanism, and an ice freezing mechanism. The first clamping mechanism and the second clamping mechanism are arranged symmetrically in the box body. The collection box is arranged inside the box body and is between the first clamping mechanism and the second clamping mechanism. The ice freezing mechanism is arranged inside the box body and is above the collection box. An extraction solution is poured into the collection box. A liquid inlet pipe is connected to the top of the collection box, and a liquid discharge pipe is connected to the bottom of the collection box. Agricultural products can be placed in the collection box and soaked in the extraction solution, so as to leach out the pesticide residues in the agricultural products;

[0007] The first clamping mechanism includes a first roller and a first support and displacement assembly. The second clamping mechanism includes a second roller and a second support and displacement assembly. The first support and displacement assembly and the second support and displacement assembly are arranged inside the box body. The first roller is arranged at the end of the first support and displacement assembly, and the second roller is arranged at the end of the second support and displacement assembly. The installation methods of the first roller and the second roller are the same.

[0008] As a further improvement of the present technical solution, the first support shifting assembly includes a lifting assembly, a support plate, a mounting plate, a cylinder, a mounting frame, a first connecting sleeve, and a first connecting column. The lifting assembly is disposed inside the box body. The support plate is horizontally arranged at the top of the lifting assembly. The cylinder is disposed at the side wall of the support plate. The mounting plate is disposed at the end of the cylinder. A mounting frame is arranged on one side of the mounting plate. The first roller is mounted on the mounting frame. One end of the first connecting sleeve is connected to the end of the mounting plate, and the other end of the first connecting sleeve extends horizontally. There are two first connecting sleeves arranged in parallel. One end of the first connecting column is connected to the wall of the mounting frame, and the other end of the first connecting column is sleeved inside the first connecting sleeve. A first spring is sleeved on the first connecting sleeve and the first connecting column. One end of the first spring is connected to the wall of the mounting plate, and the other end of the first spring is connected to the wall of the mounting frame.

[0009] As a further improvement of the present technical solution, the ice freezing mechanism includes a shifting mechanism, a first sealing housing, and a second sealing housing. Two support rods two are vertically arranged on the inner wall of the top of the box body and are arranged in parallel. The shifting mechanism is disposed on the two support rods two. The first sealing housing and the second sealing housing are disposed on the shifting mechanism. The first sealing housing and the second sealing housing are arranged oppositely. The installation methods of the first sealing housing and the second sealing housing are the same. The first sealing housing and the second sealing housing are rectangular parallelepiped shells with one end open and the other end closed. The open ends of the first sealing housing and the second sealing housing are close to each other. A freezing block is arranged inside the first sealing housing, and a freezing block is also arranged inside the second sealing housing.

[0010] As a further improvement of the present technical solution, a push plate is arranged on the shifting mechanism. A support plate is vertically arranged on the top of the first sealing housing and is on one side of the push plate. Two connecting sleeves two are vertically arranged on the plate surface of the push plate and are arranged in parallel. A connecting column two is horizontally arranged on the plate surface of the support plate, and the connecting column two is sleeved inside the connecting sleeve two. A second spring is sleeved on the connecting sleeve two and the connecting column two. One end of the second spring is connected to the plate surface of the support plate, and the other end of the second spring is connected to the plate surface of the push plate.

[0011] As a further improvement of the present technical solution, a connecting rod is horizontally arranged on the wall of the freezing block. The connecting rod passes through the wall of the first sealing housing and is close to the push plate. An elastic telescopic cover is connected between the push plate and the wall of the first sealing housing. The end of the connecting rod is connected to the end of the elastic telescopic cover.

[0012] As a further improvement of the present technical solution, a support rod three is vertically arranged at the bottom of the box body. A guiding groove is arranged at the top of the support rod three. The guiding groove includes a straight groove and an inclined groove. A guiding rod is vertically and fixedly arranged on one side of the mounting frame, and the guiding rod is fitted and sleeved inside the guiding groove. The moving mode of the second roller is the same as that of the first roller. In the initial state, the first roller is in contact with the second roller.

[0013] As a further improvement of the technical solution, an installation opening is provided in the wall of the mounting bracket, an installation block is arranged at the installation opening, and a pressure sensor is arranged at the bottom of the installation block.

[0014] As a further improvement of the technical solution, a first support rod is vertically arranged on the inner wall of the top of the box body, a cutter is arranged at the bottom of the first support rod, and the cutter is close to the first roller and the second roller and is above the first roller and the second roller.

[0015] As a further improvement of the technical solution, rubber gaskets are arranged at the open ends of the first sealing housing and the second sealing housing.

[0016] As a further improvement of the technical solution, a rack is vertically arranged in the collection box, a gear is coaxially and fixedly sleeved at the end of the first roller, and the rack is directly below the end of the first roller.

[0017] Compared with the prior art, the progress and advantages of the present invention are as follows: during the use of the present invention, when detecting the drug residues in the agricultural product scallions, the scallions are placed between the first roller and the second roller, and then the displacement mechanism drives the first sealing housing and the second sealing housing to approach each other, so that the upper end of the scallions is located inside the first sealing housing and the second sealing housing. The freezing blocks inside the first sealing housing and the second sealing housing come into contact with the upper end of the scallions, thereby freezing and sealing the upper end of the scallions, so as to avoid the wound liquid flowing out from the end of the scallions and interfering with the detection results;

[0018] After the upper end of the scallions is frozen and sealed, the displacement mechanism drives the first sealing housing and the second sealing housing to separate, and then the lifting assembly drives the first roller to move downward, so that the scallions clamped between the first roller and the second roller are placed in the collection box for soaking, so as to leach out the pesticide residues in the agricultural products for subsequent detection;

[0019] After the scallions are held between the first roller and the second roller by hand, the first roller and the second roller reset, and the cutter cuts off the upper end of the scallions to avoid the impurities at the upper end of the scallions interfering with the detection results, and can make the scallion sections completely immersed in the extraction liquid, thereby improving the accuracy of pesticide residue leaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments of the present invention. Obviously, the following described drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the cooperation between the first roller and the second roller of the present invention.

[0023] Figure 3 This is a schematic diagram of the support displacement component of the present invention.

[0024] Figure 4 This is a schematic diagram of the installation of a drum of the present invention.

[0025] Figure 5 This is a schematic diagram of the ice freezing mechanism of the present invention.

[0026] Figure 6 This is a schematic diagram of the cooperation between the first sealing housing and the second sealing housing of the present invention.

[0027] Figure 7 This is a schematic diagram of the installation of the first sealing housing of the present invention.

[0028] Figure 8 This is a schematic diagram of the cooperation between the gear and the rack of the present invention.

[0029] The labels in the figure are:

[0030] 10. Box body; 110. Collection box; 111. Liquid inlet pipe; 112. Liquid discharge pipe; 113. Rack; 120. First support rod; 121. Cutting knife; 130. Second support rod;

[0031] 20. First clamping mechanism; 210. First drum; 211. Installation block; 212. Pressure sensor; 213. Gear; 220. First support displacement component; 221. Lifting component; 222. Support plate; 223. Installation plate; 224. Cylinder; 225. Installation frame; 226. First connecting sleeve; 227. First connecting column; 228. Guide rod; 230. Third support rod; 231. Guide groove;

[0032] 30. Second clamping mechanism; 310. Second drum; 320. Second support displacement component;

[0033] 40. Ice freezing mechanism; 410. Displacement mechanism; 420. First sealing housing; 421. Pushing plate; 422. Second connecting sleeve; 523. Second connecting column; 424. Support plate; 425. Freezing block; 426. Connecting rod; 427. Elastic telescopic cover; 428. Rubber pad; 430. Second sealing housing. Detailed implementation manners

[0034] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0035] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams rather than physical diagrams, and should not be construed as limiting the present invention; in order to better illustrate the embodiments of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0036] In the attached drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the attached drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] As Figure 1-8 shown, a food safety detection device includes:

[0039] A box body 10, a collection box 110, a first clamping mechanism 20, a second clamping mechanism 30, and an ice freezing mechanism 40. The first clamping mechanism 20 and the second clamping mechanism 30 are arranged in the box body 10 and are symmetrically arranged. The collection box 110 is arranged inside the box body 10 and is between the first clamping mechanism 20 and the second clamping mechanism 30. The ice freezing mechanism 40 is arranged in the box body 10 and is above the collection box 110. An extraction liquid is poured into the collection box 110. A liquid inlet pipe 111 is connected to the top of the collection box 110, and a liquid discharge pipe 112 is connected to the bottom of the collection box 110. Agricultural products can be placed in the collection box 110 and soaked in the extraction liquid, so as to leach out the pesticide residues in the agricultural products, and thus detect the pesticide residue concentration;

[0040] The first clamping mechanism 20 includes a first roller 210 and a first support and displacement assembly 220. The second clamping mechanism 30 includes a second roller 310 and a second support and displacement assembly 320. The first support and displacement assembly 220 and the second support and displacement assembly 320 are arranged inside the box body 10. The first roller 210 is arranged at the end of the first support and displacement assembly 220, and the second roller 310 is arranged at the end of the second support and displacement assembly 320. The first roller 210 and the second roller 310 are installed in the same way and are used to clamp strip-shaped agricultural products (such as scallions), so as to place the strip-shaped agricultural products into the collection box 110 for soaking.

[0041] As Figures 2-4 As shown in the figure, the first support and displacement assembly 220 includes a lifting assembly 221, a support plate 222, a mounting plate 223, a cylinder 224, a mounting frame 225, a first connecting sleeve 226, and a first connecting column 227. The lifting assembly 221 (which is a prior art and will not be elaborated too much) is arranged inside the box body 10. The support plate 222 is horizontally arranged at the top of the lifting assembly 221. The cylinder 224 is arranged at the side wall of the support plate 222. The mounting plate 223 is arranged at the end of the cylinder 224. A mounting frame 225 is arranged on one side of the mounting plate 223. The first roller 210 is installed on the mounting frame 225. One end of the first connecting sleeve 226 is connected to the end of the mounting plate 223, and the other end of the first connecting sleeve 226 extends horizontally. There are two first connecting sleeves 226 arranged in parallel. One end of the first connecting column 227 is connected to the wall of the mounting frame 225, and the other end of the first connecting column 227 is sleeved inside the first connecting sleeve 226. A first spring is sleeved on the first connecting sleeve 226 and the first connecting column 227. One end of the first spring is connected to the wall of the mounting plate 223, and the other end of the first spring is connected to the wall of the mounting frame 225.

[0042] As Figures 5-8 As shown in the figure, the ice freezing mechanism 40 includes a displacement mechanism 410, a first sealed housing 420, and a second sealed housing 430. A second support rod 130 is vertically arranged on the inner wall of the top of the box body 10. There are two second support rods 130 arranged in parallel. The displacement mechanism 410 (which is a prior art and will not be elaborated too much) is arranged on the two second support rods 130. The first sealed housing 420 and the second sealed housing 430 are arranged on the displacement mechanism 410. The first sealed housing 420 and the second sealed housing 430 are arranged opposite to each other. The first sealed housing 420 and the second sealed housing 430 are installed in the same way. The first sealed housing 420 and the second sealed housing 430 are cuboid housings with one end open and the other end closed. The open end of the first sealed housing 420 is close to the open end of the second sealed housing 430. A freezing block 425 is arranged inside the first sealed housing 420, and a freezing block 425 is also arranged inside the second sealed housing 430.

[0043] More specifically, a push plate 421 is provided on the displacement mechanism 410. A support plate 424 is vertically provided at the top of the first sealing housing 420. The support plate 424 is on one side of the push plate 421. Two connecting sleeves II 422 are vertically provided on the surface of the push plate 421 and are arranged in parallel. A connecting column II 423 is horizontally provided on the surface of the support plate 424. The connecting column II 423 is sleeved in the connecting sleeve II 422. A second spring is sleeved on the connecting sleeve II 422 and the connecting column II 423. One end of the second spring is connected to the surface of the support plate 424, and the other end of the second spring is connected to the surface of the push plate 421. When detecting the drug residues in the scallions, the scallions are placed between the first roller 210 and the second roller 310. Then, the displacement mechanism 410 drives the first sealing housing 420 and the second sealing housing 430 to approach each other, so that the upper end of the scallions is located inside the first sealing housing 420 and the second sealing housing 430. The freezing blocks 425 inside the first sealing housing 420 and the second sealing housing 430 contact the upper end of the scallions, thereby freezing and sealing the upper end of the scallions. After freezing and sealing the upper end of the scallions, the displacement mechanism 410 drives the first sealing housing 420 and the second sealing housing 430 to separate. Then, the lifting assembly 221 drives the first roller 210 to move downward, so that the scallions clamped between the first roller 210 and the second roller 310 are placed in the collection box 110 for soaking, thereby leaching the pesticide residues in the scallions, facilitating subsequent detection.

[0044] More specifically, a connecting rod 426 is horizontally provided on the wall of the freezing block 425. The connecting rod 426 passes through the wall of the first sealing housing 420 and is close to the push plate 421. An elastic telescopic cover 427 is connected between the push plate 421 and the wall of the first sealing housing 420. The end of the connecting rod 426 is connected to the end of the elastic telescopic cover 427. When the displacement mechanism 410 drives the open ends of the first sealing housing 420 and the second sealing housing 430 to contact, then the displacement mechanism 410 drives the push plate 421 to move in the direction close to the first sealing housing 420. The push plate 421 pushes the connecting rod 426 and the freezing block 425 to move in the direction close to the scallions, so that the freezing blocks 425 inside the first sealing housing 420 and the freezing blocks 425 inside the second sealing housing 430 clamp and freeze the upper end of the scallions.

[0045] Such as Figures 2-3As shown in the figure, a third support rod 230 is vertically arranged at the bottom of the box body 10. A guiding groove 231 is arranged at the top of the third support rod 230. The guiding groove 231 includes a straight groove and an inclined groove. A guiding rod 228 is vertically and fixedly arranged on one side of the mounting frame 225. The guiding rod 228 is fitted in the guiding groove 231. The moving mode of the second roller 310 is the same as that of the first roller 210. In the initial state, the first roller 210 is in contact with the second roller 310. The air cylinder 224 pushes the mounting plate 223 to move, thereby pushing the mounting frame 225 to move. The guiding rod 228 moves along the straight groove and the inclined groove of the guiding groove 231, thereby driving the first roller 210 and the second roller 310 to separate from each other, so as to facilitate clamping the scallions between the first roller 210 and the second roller 310.

[0046] As Figure 4 shown, a mounting opening is formed in the wall of the mounting frame 225. A mounting block 211 is arranged at the mounting opening. A pressure sensor 212 is arranged at the bottom of the mounting block 211, so as to facilitate weighing the clamped scallions, thereby determining the amount of the extraction liquid in the collection box 110 and facilitating the control of the ratio between the scallions and the extraction liquid.

[0047] As Figure 5 shown, a first support rod 120 is vertically arranged on the inner wall of the top of the box body 10. A cutting knife 121 is arranged at the bottom of the first support rod 120. The cutting knife 121 is close to the first roller 210 and the second roller 310 and is above the first roller 210 and the second roller 310. After the scallions are held by hand between the first roller 210 and the second roller 310, the first roller 210 and the second roller 310 reset, and the cutting knife 121 cuts off the upper end of the scallions to avoid interference of the impurities at the upper end of the scallions on the detection results.

[0048] As Figure 6 shown, rubber pads 428 are arranged at the open ends of the first sealing shell 420 and the second sealing shell 430, so as to protect the scallions.

[0049] As Figure 8 shown, a rack 113 is vertically arranged in the collection box 110. A gear 213 is coaxially and fixedly sleeved at the end of the first roller 210. The rack 113 is directly below the end of the first roller 210. When the first roller 210 and the second roller 310 move down and are in the collection box 110, the rack 113 meshes with the gear 213, thereby driving the first roller 210 and the second roller 310 to rotate. Therefore, the scallion segments clamped between the first roller 210 and the second roller 310 can be completely immersed in the extraction liquid, so as to improve the accuracy of the pesticide residue leaching.

[0050] Working principle:

[0051] During the use of the present invention, when detecting drug residues in agricultural products, the scallions are placed between the first roller 210 and the second roller 310. Then, the displacement mechanism 410 drives the first sealing housing 420 and the second sealing housing 430 to approach each other, so that the upper end of the scallions is located inside the first sealing housing 420 and the second sealing housing 430. The freezing blocks 425 inside the first sealing housing 420 and the second sealing housing 430 come into contact with the upper end of the scallions, thereby freezing and sealing the upper end of the scallions. After freezing and sealing the upper end of the scallions, the displacement mechanism 410 drives the first sealing housing 420 and the second sealing housing 430 to separate. Then, the lifting assembly 221 drives the first roller 210 to move downward, so that the scallions clamped between the first roller 210 and the second roller 310 are placed in the collection box 110 for soaking, thereby leaching the pesticide residues in the scallions, facilitating subsequent detection. When the displacement mechanism 410 drives the open ends of the first sealing housing 420 and the second sealing housing 430 to contact, then the displacement mechanism 410 drives the push plate 421 to move towards the direction close to the first sealing housing 420. The push plate 421 pushes the connecting rod 426 and the freezing block 425 to move towards the direction close to the scallions, so that the freezing blocks 425 inside the first sealing housing 420 and the freezing blocks 425 inside the second sealing housing 430 clamp and freeze the upper end of the scallions. The air cylinder 224 pushes the mounting plate 223 to move, thereby pushing the mounting frame 225 to move. The guide rod 228 moves along the linear groove and the inclined groove of the guide groove 231, thereby driving the first roller 210 and the second roller 310 to separate from each other, so as to facilitate clamping the scallions between the first roller 210 and the second roller 310. After the scallions are held by hand between the first roller 210 and the second roller 310, the first roller 210 and the second roller 310 reset, and the cutter 121 cuts off the upper end of the scallions to avoid interference of impurities at the upper end of the scallions with the detection results.

[0052] It should be noted that the above specific embodiments are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these transformations do not deviate from the spirit of the present invention, they should be within the protection scope of the present invention. In addition, some terms used in the description and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A food safety detection device, characterized in that: It includes: A box body, a collection box, a clamping mechanism 1, a clamping mechanism 2, and a freezing mechanism. The clamping mechanism 1 and the clamping mechanism 2 are arranged in the box body and are symmetrically arranged. The collection box is arranged inside the box body and between the clamping mechanism 1 and the clamping mechanism 2. The freezing mechanism is arranged inside the box body and above the collection box. An extracting liquid is poured into the collection box. The top of the collection box is connected to a liquid inlet pipe, and the bottom of the collection box is connected to a liquid discharge pipe. Agricultural products can be placed in the collection box and immersed in the extracting liquid, so that pesticide residues in the agricultural products are leached out. The clamping mechanism 1 includes a roller 1 and a supporting and shifting assembly 1, and the clamping mechanism 2 includes a roller 2 and a supporting and shifting assembly 2. The supporting and shifting assembly 1 and the supporting and shifting assembly 2 are arranged in a box body, the roller 1 is arranged at the end of the supporting and shifting assembly 1, and the roller 2 is arranged at the end of the supporting and shifting assembly 2. The installation method of the roller 1 and the roller 2 is the same.

2. A food safety detection device according to claim 1, characterized in that: A support and shifting assembly includes a lifting assembly, a support plate, a mounting plate, a cylinder, a mounting frame, a connecting sleeve and a connecting column. The lifting assembly is arranged in a box body, the support plate is horizontally arranged at the top of the lifting assembly, the cylinder is arranged at the side wall of the support plate, the mounting plate is arranged at the end of the cylinder, a mounting frame is arranged on one side of the mounting plate, a roller is installed on the mounting frame, one end of the connecting sleeve is connected to the end of the mounting plate, the other end of the connecting sleeve extends horizontally, two connecting sleeves are provided and arranged in parallel, one end of the connecting column is connected to the wall of the mounting frame, the other end of the connecting column is sleeved in the connecting sleeve, a spring is sleeved on the connecting sleeve and the connecting column, one end of the spring is connected to the wall of the mounting plate, and the other end of the spring is connected to the wall of the mounting frame.

3. A food safety detection device according to claim 2, characterized in that: The freezing mechanism includes a shifting mechanism, a sealed shell 1 and a sealed shell 2. A support rod 2 is vertically arranged on the top inner wall of the box body. Two support rods 2 are provided and are arranged in parallel. The shifting mechanism is arranged on the two support rods 2. The sealed shell 1 and the sealed shell 2 are provided on the shifting mechanism. The sealed shell 1 and the sealed shell 2 are arranged relatively to each other. The installation method of the sealed shell 1 and the sealed shell 2 is the same. The sealed shell 1 and the sealed shell 2 are rectangular shells with one end open and the other end closed. The open end of the sealed shell 1 and the open end of the sealed shell 2 are close to each other. A freezing block is provided in the sealed shell 1 and a freezing block is also provided in the sealed shell 2.

4. A food safety detection device according to claim 3, characterized in that: A push plate is provided on the shift mechanism, and a support plate is vertically provided on the top of the sealing shell one, the support plate is on one side of the push plate, a connecting sleeve 2 is vertically provided on the plate surface of the push plate, two connecting sleeves 2 are provided and are arranged in parallel, a connecting column 2 is horizontally provided on the plate surface of the support plate, the connecting column 2 is sleeved in the connecting sleeve 2, a spring 2 is sleeved on the connecting sleeve 2 and the connecting column 2, one end of the spring 2 is connected to the plate surface of the support plate, and the other end of the spring 2 is connected to the plate surface of the push plate.

5. A food safety detection device according to claim 4, characterized in that: A connecting rod is horizontally arranged on the wall of the freezing block, the connecting rod passes through the wall of the sealing shell one and is close to the push plate, an elastic telescopic cover is connected between the push plate and the wall of the sealing shell one, and the end of the connecting rod is connected to the end of the elastic telescopic cover.

6. A food safety detection device according to claim 5, characterized in that: A support rod three is vertically arranged at the bottom of the box body, and a guide groove is arranged on the top of the support rod three. The guide groove includes a straight groove and an inclined groove. A guide rod is vertically fixedly arranged on one side of the mounting frame, and the guide rod is matched and sleeved in the guide groove. The movement mode of roller two is the same as that of roller one. In the initial state, roller one is in contact with roller two.

7. A food safety detection device according to claim 6, characterized in that: The wall of the mounting frame is provided with a mounting opening, a mounting block is arranged at the mounting opening, a pressure sensor is arranged at the bottom of the mounting block, a rack is arranged vertically in the collection box, a gear is arranged coaxially with the end of the roller, and the rack is located directly below the end of the roller.

8. A food safety detection device according to claim 7, characterized in that: A support rod 1 is vertically arranged on the top inner wall of the box body, and a cutter is arranged at the bottom of the support rod 1. The cutter is close to the first roller and the second roller and is located above the first roller and the second roller.

9. A food safety detection device according to claim 8, characterized in that: The opening ends of the sealing shell 1 and the sealing shell 2 are provided with rubber pads.

10. A detection method for a food safety detection device according to claim 9, wherein: S1. When testing the drug residue in the onion, the onion is placed between the first drum and the second drum, and then the shifting mechanism drives the sealed shell one and the second sealed shell to approach each other, so that the upper end of the onion is in the sealed shell one and the second sealed shell, and the frozen blocks in the sealed shell one and the second sealed shell contact the upper end of the onion, so that the upper end of the onion is frozen and frozen. After the upper end of the onion is frozen, the shifting mechanism drives the sealed shell one and the second sealed shell to separate, and then the lifting assembly drives the drum to move down, so that the onion clamped between the first drum and the second drum is placed in the collection box for soaking, so that the pesticide residue in the onion is leached out; S2. When the shifting mechanism drives the sealed shell one to contact the open end of the sealed shell two, the shifting mechanism then drives the push plate to move in the direction close to the sealed shell one, and the push plate pushes the connecting rod and the freezing block to move in the direction close to the onion, so that the freezing block in the sealed shell one and the freezing block in the sealed shell two clamp the upper end of the onion and freeze it, and the cylinder pushes the mounting plate to move, thereby pushing the mounting frame to move, and the guide rod moves along the straight groove and the inclined groove of the guide groove, thereby driving the roller one and the roller two to separate from each other, so as to facilitate the onion to be clamped between the roller one and the roller two. After the onion is held between the roller one and the roller two, the roller one and the roller two are reset, and the cutter cuts off the upper end of the onion to prevent impurities at the upper end of the onion from interfering with the detection results.

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