A pre-treatment device for food testing

Abstract

The present invention relates to the technical field of sample preparation for testing, and specifically discloses a pre-processing device for food testing, including a base, an inverted U-shaped bracket vertically arranged on the base, a first pressing plate arranged on the side of the bracket, a driving device for driving the first pressing plate to reciprocate in the horizontal direction, a second pressing plate hinged to the side of the bracket, a first card slot opened on the side wall of the bracket, a second card slot arranged below the first card slot, a horizontally arranged connecting rod, a plurality of connecting tubes arranged on the connecting rod, a rubber tube connected to the connecting tube, and a plurality of sample tubes arranged on the base; the first pressing plate and the second pressing plate are arranged oppositely and respectively arranged on both sides of the bracket, the first card slot and the second card slot are respectively arranged on the upper and lower sides of the first pressing plate, the end of the rubber tube away from the connecting tube is a closed end, and the connecting rod is clamped in the first card slot. The pre-processing device for food testing of the present invention can efficiently and automatically perform pre-processing on food for testing.

Description

Technical Field

[0001] The present invention relates to the technical field of sample preparation for testing, and in particular to a pre-treatment device for food testing. Background Art

[0002] Food testing refers to the inspection of the quality of food raw materials, auxiliary materials, semi-finished products, finished products and by-products to ensure that the product quality is qualified. The content of food inspection includes sensory testing of food, testing of nutrients, additives, and harmful substances in food, etc.

[0003] Common food testing is mainly divided into testing conducted in professional testing rooms and testing conducted on-site. There are many testing methods according to the different types of samples to be tested and the different categories to be tested. The most common ones are to detect related substances in food through headspace, chromatography, mass spectrometry and other equipment. The more important part of this type of testing method is to pre-treat the sample, which mainly uses relevant shearing and grinding equipment to grind the food into a paste, then mix it with the detection reagent, extract and dissolve the ingredients to be tested in the food through the detection reagent, and finally use the relevant detection equipment for testing. Therefore, fully grinding the food and mixing it with the detection reagent is a more critical step. The common practice is to use grinding dishes and other equipment for manual grinding. Since a large number of samples usually need to be tested, the grinding process is very long, and in order to avoid errors caused by mutual influence between samples, usually after grinding a sample, the grinding device needs to be fully cleaned, which is also very time-consuming. Therefore, it is necessary to design a more efficient and reasonable sample processing device. Summary of the invention

[0004] The object of the present invention is to provide a food pre-processing device for testing, which can efficiently and automatically perform pre-testing treatment on food.

[0005] The present invention is implemented through the following technical scheme: the pre-processing device for food inspection of the present invention includes a base, an inverted U-shaped bracket vertically arranged on the base, a first pressing plate arranged on the side of the bracket, a driving device for driving the first pressing plate to reciprocate in the horizontal direction, a second pressing plate hinged to the side of the bracket, a first card slot opened on the side wall of the bracket, a second card slot arranged below the first card slot, a horizontally arranged connecting rod, a plurality of connecting tubes arranged on the connecting rod, a rubber tube connected to the connecting tube, and a plurality of sample tubes arranged on the base; the first pressing plate and the second pressing plate are arranged opposite to each other and are respectively arranged on both sides of the bracket, the first card slot and the second card slot are respectively arranged on the upper and lower sides of the first pressing plate, the end of the rubber tube away from the connecting tube is a closed end, and the connecting rod is clamped in the first card slot.

[0006] Furthermore, a hinge block is provided at the connection between the second pressure plate and the bracket, the hinge block is hinged to the second pressure plate, a sliding rod is provided on the side of the hinge block close to the bracket, a spring is sleeved on the outer wall of the sliding rod, and the hinge block is rotatably connected with a bolt; the sliding rod is slidably connected to the bracket, the bolt is threadedly connected to the bracket, and both ends of the spring are respectively connected to the bracket and the hinge block.

[0007] Furthermore, a first latch hole is provided at one end of the second pressure plate away from the hinge block, a plurality of second latch holes are provided at one end of the bracket away from the hinge block, and a latch rod is inserted into both the first latch hole and the second latch hole; the plurality of second latch holes are distributed in the horizontal direction.

[0008] Furthermore, a bottom plate is slidably provided on the upper surface of the base, a surrounding frame is provided on the bottom plate, a first support plate is provided inside the surrounding frame, a plurality of limiting rings are provided on the first support plate, and the sample tube is clamped in the limiting ring.

[0009] Furthermore, a pair of the frames are provided on the bottom plate, one of the frames is provided with the first support plate, and the other frame is provided with the second support plate; a cleaning device is provided on the second support plate; the cleaning device includes a plurality of water receiving frames provided on the second support plate, drainage pipes connected to the water receiving frames, flushing pipes vertically provided on the water receiving frames, flushing holes provided on the side walls of the flushing pipes, and a water supply device connected to the flushing pipes; the water receiving frames correspond one to one to the rubber tubes.

[0010] Furthermore, a pair of first through holes are opened on the bottom plate, and the pair of first through holes are respectively arranged in a pair of the surrounding frames; a second through hole is opened on the upper surface of the base, a lifting plate is arranged in the second through hole, and a lifting device for driving the lifting plate to rise and fall is arranged in the base; the lifting device includes an electric push rod vertically arranged in the base, a limiting cylinder vertically arranged in the base, and a limiting rod fixedly connected to the lower side of the lifting plate; the telescopic end of the electric push rod is fixedly connected to the lower side of the lifting plate, and the limiting rod is slidably arranged in the limiting cylinder.

[0011] Furthermore, a porous plate is provided at the upper end of the interior of the sample tube.

[0012] Furthermore, a horizontally arranged liquid adding pipe is provided at the upper end of the bracket, the liquid adding pipe is connected to a liquid supply device, and a plurality of liquid adding nozzles are provided at the lower side of the liquid adding pipe; the liquid adding nozzles correspond to the rubber tubes one by one.

[0013] Furthermore, a pair of limit bars are provided on one side of the bracket close to the first pressure plate; the pair of limit bars are respectively provided on the upper and lower sides of the first pressure plate; a sliding groove is provided on one side of the limit bar close to the first pressure plate; and the upper and lower sides of the first pressure plate are both slidably arranged in the sliding groove.

[0014] Furthermore, the inner wall of the rubber tube is provided with a plurality of protrusions.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: when using the food testing pre-processing device of the present invention, the chopped food blocks are first put into the rubber tube, and then the two ends of the connecting rod are clamped in the first clamping groove (so that the rubber tube is kept vertical and the opening is facing upward). At this time, one side of the rubber tube contacts the first pressing plate, and then the second pressing plate is pressed on the side wall of the rubber tube, and the rubber tube is flattened by the first pressing plate and the second pressing plate, and the driving device is started to make the first pressing plate reciprocate. The rubber tube is repeatedly squeezed by the action of the first pressing plate, and the food blocks inside it are squeezed into a paste state, and then the testing tube is Add the reagent to the rubber tube, squeeze the rubber tube again, so that the reagent fully contacts the food paste and extracts the components to be detected. After a certain period of time, open the second pressing plate, take out the connecting rod from the first card slot, insert the filter cotton into the connecting tube, and then rotate the connecting rod 180 degrees to make the rubber tube inverted (the opening faces down and sticks to the first pressing plate), place the sample tube directly below the opening of the rubber tube, and press the second pressing plate on the rubber tube again. At this time, the rubber tube can be slowly squeezed by the second pressing plate, and the liquid in the rubber tube is squeezed out of the filter cotton and then squeezed into the sample tube for standby use. Then take out the connecting rod from the second card slot, take out the filter cotton from the connecting tube, and rinse the rubber tube.

[0016] In this way, the device only needs to clean the rubber tube, which can significantly reduce the types of tools required and the number of tools that need to be cleaned, thereby reducing the operation time and the mutual influence between samples; it can process multiple samples at one time and can better ensure the consistency of parameters during processing, and the differences between samples caused by processing methods are smaller; the device is simple to use, highly integrated, and can be more easily carried out for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a food pretreatment device provided in an embodiment of the present invention;

[0018] Figure 2 A schematic structural diagram of a state of a food detection pretreatment device provided by an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the structure of a food detection pretreatment device in two states provided by an embodiment of the present invention;

[0020] Figure 4 A structural schematic diagram of a support portion from one perspective provided by an embodiment of the present invention;

[0021] Figure 5 A schematic structural diagram of a bracket portion from two viewing angles provided by an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the structure of a bracket part from three perspectives provided by an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the structure of the second pressing plate after being unfolded provided by an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the structure of a cleaning device provided by an embodiment of the present invention;

[0025] Fig. 9 A schematic structural diagram of a rubber tube portion provided by an embodiment of the present invention;

[0026] Fig.10 A schematic diagram of the structure of the bottom plate part provided by an embodiment of the present invention;

[0027] Fig.11 A schematic diagram of the structure of a base portion provided by an embodiment of the present invention;

[0028] Fig.12 A schematic diagram of the structure inside the base provided by an embodiment of the present invention;

[0029] Fig.13 for Figure 4 A magnified view of part A;

[0030] Fig.14 A schematic structural diagram of a driving device portion provided in an embodiment of the present invention.

[0031] Icon: 10-base, 11-second through hole, 12-lifting plate, 13-electric push rod, 14-limiting cylinder, 15-limiting rod, 16-bottom plate, 17-surrounding frame, 18-first through hole, 20-bracket, 21-first card slot, 22-second card slot, 23-first pressure plate, 24-second pressure plate, 25-driving device, 251-turntable, 252-first driving rod, 253-second driving rod, 26-limiting bar, 2 7-hinge block, 28-bolt, 29-slide rod, 210-spring, 31-connecting rod, 32-connecting tube, 33-rubber tube, 34-first support plate, 35-limiting ring, 36-sample tube, 37-porous plate, 40-cleaning device, 41-second support plate, 42-water receiving frame, 43-drain pipe, 44-flushing pipe, 45-flushing hole, 51-liquid adding tube, 52-liquid adding nozzle, 53-storage tank, 54-liquid supply tube. DETAILED DESCRIPTION

[0032] Example

[0033] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Fig.14As shown, the food detection pretreatment device of this embodiment includes a base 10, an inverted U-shaped bracket 20 vertically arranged on the base 10, a first pressing plate 23 arranged on the side of the bracket 20, a driving device 25 for driving the first pressing plate 23 to reciprocate in the horizontal direction, a second pressing plate 24 hinged to the side of the bracket 20, a first card slot 21 opened on the side wall of the bracket 20, a second card slot 22 arranged below the first card slot 21, a horizontally arranged connecting rod 31, a plurality of connecting tubes 32 arranged on the connecting rod 31, a rubber tube 33 connected to the connecting tube 32, and a plurality of sample tubes 36 arranged on the base 10; the first pressing plate 23 and the second pressing plate 24 are arranged opposite to each other and are respectively arranged on both sides of the bracket 20, the first card slot 21 and the second card slot 22 are respectively arranged on the upper and lower sides of the first pressing plate 23, the end of the rubber tube 33 away from the connecting tube 32 is a closed end, and the connecting rod 31 is clamped in the first card slot 21. Specifically, when in use, the chopped food blocks are first put into the rubber tube 33, and then the two ends of the connecting rod 31 are clamped in the first clamping groove 21 (so that the rubber tube 33 is kept vertical and the opening is facing upward). At this time, one side of the rubber tube 33 contacts the first pressing plate 23, and then the second pressing plate 24 is pressed on the side wall of the rubber tube 33, and the rubber tube 33 is flattened by the first pressing plate 23 and the second pressing plate 24. The driving device 25 is started to make the first pressing plate 23 reciprocate. The rubber tube 33 is repeatedly squeezed under the action of the first pressing plate 23 and the second pressing plate 24, and the food blocks inside it are squeezed into a paste state. Then, the detection reagent is added to the rubber tube 33, and the rubber tube is reciprocated again. 33 is squeezed so that the reagent is fully in contact with the food paste and the components to be detected are extracted therefrom. After a certain period of time, the second pressing plate 24 is opened, the connecting rod 31 is taken out from the first card slot 21, and the filter cotton and the like are inserted into the connecting tube 32. Then the connecting rod 31 is rotated 180 degrees so that the rubber tube 33 is inverted (the opening faces downward and is attached to the first pressing plate 23), the sample tube 36 is placed directly below the opening of the rubber tube 33, and the second pressing plate 24 is pressed again on the rubber tube 33. At this time, the rubber tube 33 can be slowly and fully squeezed by the second pressing plate 24, and the liquid in the rubber tube 33 is squeezed out through the filter cotton and then squeezed into the sample tube 36 for standby use. Then the connecting rod 31 is taken out from the second card slot 22, the filter cotton is taken out from the connecting tube 32, and the rubber tube 33 is rinsed. In this way, the device only needs to clean the rubber tube 33, which can significantly reduce the types of tools required and the number of tools that need to be cleaned, which can also reduce the operation time and reduce the mutual influence between samples; it can process multiple samples at the same time, and can better ensure the consistency of parameters during processing, and the differences between samples caused by the processing methods are smaller; the device is simple to use, highly integrated, and can be more easily carried out for use. It should be noted that the use of rubber tube 33 to prepare samples is mainly due to the fact that rubber itself is relatively stable and will not react with most foods. Therefore, it is applicable to most foods, and this device may not be used for special foods.

[0034] In this embodiment, a hinge block 27 is provided at the connection between the second pressing plate 24 and the bracket 20. The hinge block 27 is hinged to the second pressing plate 24. A sliding rod 29 is provided on the side of the hinge block 27 close to the bracket 20. A spring 210 is sleeved on the outer wall of the sliding rod 29. The hinge block 27 is rotatably connected with a bolt 28. The sliding rod 29 is slidably connected to the bracket 20. The bolt 28 is threadedly connected to the bracket 20. The two ends of the spring 210 are respectively connected to the bracket 20 and the hinge block 27. Specifically, when the food block is only squeezed and crushed for the first time, since there is not much content in the rubber tube 33, the first pressing plate 23 needs to be closer to the second pressing plate 24. When the detection reagent is added to the rubber tube 33, the content becomes more, so it is necessary to increase the distance between the first pressing plate 23 and the second pressing plate 24 to avoid squeezing the sample out of the rubber tube 33. Finally, when the liquid in the rubber tube 33 is squeezed out, the first pressing plate 23 needs to be as close to the second pressing plate 24 as possible. Therefore, the distance between the first pressing plate 23 and the second pressing plate 24 needs to be adjustable. The specific adjustment method is mainly achieved through the hinge block 27, as shown in the attached Fig.13 As shown, the second pressure plate 24 is first hinged to the hinge block 27, and then connected to the bracket 20 through the hinge block 27, and the gap between the hinge block 27 and the bracket 20 can be adjusted by the bolt 28. When the bolt 28 is turned, the gap between the hinge block 27 and the bracket 20 can be adjusted, thereby achieving the purpose of adjusting the gap between the second pressure plate 24 and the first pressure plate 23. The structures such as the slide rod 29 and the spring 210 are mainly used to support the hinge block 27 to keep it stable.

[0035] In this embodiment, the second pressing plate 24 is provided with a first latch hole at one end away from the hinge block 27, and the bracket 20 is provided with a plurality of second latch holes at one end away from the hinge block 27. A latch rod is inserted into the first latch hole and the second latch hole at the same time; the plurality of second latch holes are distributed in the horizontal direction. Specifically, the distance between one end of the second pressing plate 24 and the first pressing plate 23 can be adjusted by the hinge block 27 and the bolt 28, and the distance between the other end of the second pressing plate 24 and the first pressing plate 23 can be adjusted by the first latch hole, the second latch hole and the latch rod. After the distance between the hinge block 27 and the bracket 20 is adjusted, the latch rod is inserted into the corresponding second latch hole and the first latch hole to ensure that the first pressing plate 23 and the second pressing plate 24 remain relatively parallel.

[0036] In this embodiment, a bottom plate 16 is slidably provided on the upper surface of the base 10 , a surrounding frame 17 is provided on the bottom plate 16 , a first support plate 34 is provided inside the surrounding frame 17 , a plurality of limiting rings 35 are provided on the first support plate 34 , and a sample tube 36 is clamped in the limiting ring 35 .

[0037] In this embodiment, a pair of enclosures 17 are provided on the bottom plate 16, wherein a first support plate 34 is provided in one enclosure 17, and a second support plate 41 is provided in the other enclosure 17; a cleaning device 40 is provided on the second support plate 41; the cleaning device 40 includes a plurality of water receiving frames 42 provided on the second support plate 41, a drainage pipe 43 connected to the water receiving frames 42, a flushing pipe 44 vertically provided on the water receiving frames 42, a flushing hole 45 provided on the side wall of the flushing pipe 44, and a water supply device connected to the flushing pipe 44; the water receiving frames 42 correspond to the rubber tubes 33 one by one. Specifically, the sample tubes 36 and the cleaning device 40 can be switched by sliding the bottom plate 16, wherein the sample tubes 36 are placed directly below the rubber tubes 33 (as shown in the attached figure). Figure 2 As shown in the figure), after squeezing the liquid in the rubber tube 33 into the sample tube 36, slide the bottom plate 16 so that the sample tube 36 slides out from under the rubber tube 33, rotate the cleaning device 40 to rotate the rubber tube 33, and extend the flushing tube 44 into the rubber tube 33. Pump the cleaning liquid into the rubber tube 33 through the water supply device to flush the inner wall of the rubber tube 33. After flushing, the waste liquid flows into the water receiving frame 42 and is discharged through the drain pipe 43 (as shown in the figure). Figure 3 as shown).

[0038] In this embodiment, a pair of first through holes 18 are provided on the bottom plate 16, and the pair of first through holes 18 are respectively provided in a pair of surrounding frames 17; a second through hole 11 is provided on the upper surface of the base 10, and a lifting plate 12 is provided in the second through hole 11, and a lifting device for driving the lifting plate 12 to rise and fall is provided in the base 10; the lifting device includes an electric push rod 13 vertically provided in the base 10, a limiting cylinder 14 vertically provided in the base 10, and a limiting rod 15 fixedly connected to the lower side of the lifting plate 12; the telescopic end of the electric push rod 13 is fixedly connected to the lower side of the lifting plate 12, and the limiting rod 15 is slidably provided in the limiting cylinder 14. A porous plate 37 is provided at the upper end of the sample tube 36. Specifically, the first support plate 34 or the second support plate 41 can be lifted up by the lifting device and the lifting plate 12. When the first support plate 34 is lifted up, the connecting tube 32 can be inserted into the sample tube 36 and abut against the porous plate 37, so that the liquid in the rubber tube 33 can be better coarsely filtered. When the second support plate 41 is lifted up, the flushing tube 44 can be inserted into the rubber tube 33, so that the rubber tube 33 can be better flushed.

[0039] In this embodiment, a horizontally arranged liquid adding pipe 51 is provided at the upper end of the bracket 20, and the liquid adding pipe 51 is connected to a liquid supply device, and a plurality of liquid adding nozzles 52 are provided at the lower side of the liquid adding pipe 51; the liquid adding nozzles 52 correspond to the rubber tube 33 one by one. Specifically, a quantitative detection reagent can be added to the rubber tube 33 efficiently, accurately and automatically through the liquid adding pipe 51 and the liquid adding nozzle 52. The liquid supply device mainly includes a storage tank 53, a liquid supply pipe 54, a pump body and other structures.

[0040] In this embodiment, the bracket 20 is provided with a pair of limit bars 26 on the side close to the first pressure plate 23; the pair of limit bars 26 are respectively provided on the upper and lower sides of the first pressure plate 23; the limit bars 26 are provided with a slide groove on the side close to the first pressure plate 23; the upper and lower sides of the first pressure plate 23 are both slidably arranged in the slide groove. Specifically, the first pressure plate 23 is limited by the pair of limit bars 26, so that it can perform stable reciprocating movement in the horizontal direction. It should be noted that the driving device 25 can use a conventional structure that can drive the first pressure plate 23 to perform reciprocating motion, such as the attached Fig.14 As shown, a motor can be used to drive the turntable 251 to rotate, and the first driving rod 252 is connected to the edge of the turntable 251. The first driving rod 252 is hinged to the second driving rod 253, and is connected to the second pressing plate 24 through the second driving rod 253, so that the second pressing plate 24 can be driven to do reciprocating motion.

[0041] In this embodiment, a plurality of protrusions are arranged on the inner wall of the rubber tube 33. Specifically, the densely arranged protrusions can better grind the food sample.

[0042] In summary, the food detection pre-treatment device of this embodiment, when in use, first puts the chopped food block into the rubber tube 33, and then clamps the two ends of the connecting rod 31 in the first clamping groove 21 (to keep the rubber tube 33 vertical and open upward), at this time, one side of the rubber tube 33 contacts the first pressing plate 23, and then the second pressing plate 24 is pressed on the side wall of the rubber tube 33, and the rubber tube 33 is flattened by the first pressing plate 23 and the second pressing plate 24, and the driving device 25 is started to make the first pressing plate 23 reciprocate, and the rubber tube 33 is repeatedly squeezed under the action of the first pressing plate 23, and the food block inside is squeezed into a paste, and then the detection reagent is added to the rubber tube 33, The rubber tube 33 is squeezed again so that the reagent is fully in contact with the food paste and the components to be detected are extracted therefrom. After a certain period of time, the second pressing plate 24 is opened, the connecting rod 31 is taken out from the first card slot 21, and the filter cotton is inserted into the connecting tube 32. Then the connecting rod 31 is rotated 180 degrees so that the rubber tube 33 is inverted (the opening faces downward and is attached to the first pressing plate 23), the sample tube 36 is placed directly below the opening of the rubber tube 33, and the second pressing plate 24 is pressed on the rubber tube 33 again. At this time, the rubber tube 33 can be slowly squeezed by the second pressing plate 24, and the liquid in the rubber tube 33 is squeezed out into the sample tube 36 after passing through the filter cotton for standby use. Then the connecting rod 31 is taken out from the second card slot 22, the filter cotton is taken out from the connecting tube 32, and the rubber tube 33 is rinsed. In this way, the device only needs to clean the rubber tube 33, which can significantly reduce the types of tools required and the number of tools that need to be cleaned, thereby reducing the operation time and the mutual influence between samples; it can process multiple samples at one time and better ensure the consistency of parameters during processing, and the differences between samples caused by processing methods are smaller; the device is simple to use, highly integrated, and can be more easily carried out for use.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pre-treatment device for food testing, characterized in that: The invention comprises a base (10), an inverted U-shaped bracket (20) vertically arranged on the base (10), a first pressing plate (23) arranged on the side of the bracket (20), a driving device (25) for driving the first pressing plate (23) to reciprocate in a horizontal direction, a second pressing plate (24) hinged to the side of the bracket (20), a first card slot (21) provided on the side wall of the bracket (20), a second card slot (22) provided below the first card slot (21), a horizontally arranged connecting rod (31), a plurality of connecting tubes (32) arranged on the connecting rod (31), a rubber tube (33) connected to the connecting tube (32), and a plurality of sample tubes (36) arranged on the base (10); The first pressing plate (23) and the second pressing plate (24) are arranged opposite to each other and are respectively arranged on both sides of the bracket (20); the first clamping groove (21) and the second clamping groove (22) are respectively arranged on the upper and lower sides of the first pressing plate (23); the end of the rubber tube (33) away from the connecting tube (32) is a closed end; and the connecting rod (31) is clamped in the first clamping groove (21); When in use, the chopped food blocks are first put into the rubber tube (33), and then the two ends of the connecting rod (31) are clamped in the first clamping groove (21), so that the rubber tube (33) is kept vertical and the opening is facing upward, one side of the rubber tube (33) is in contact with the first pressing plate (23), and the second pressing plate (24) is pressed against the side wall of the rubber tube (33), and the rubber tube (33) is flattened by the first pressing plate (23) and the second pressing plate (24), and the driving device (25) is started to make the first pressing plate (23) reciprocate, and the rubber tube (33) is repeatedly squeezed under the action of the first pressing plate (23) and the second pressing plate (24); the food blocks inside are squeezed into a mushy state, and then the detection reagent is added to the rubber tube 33, and the rubber tube 33 is squeezed again, so that the reagent is fully in contact with the food mushy and the components to be detected therein are extracted; The second pressing plate (24) is opened, the connecting rod (31) is taken out from the first slot (21), the filter cotton is inserted into the connecting tube (32), and then the connecting rod (31) is rotated 180 degrees so that the opening of the rubber tube (33) faces downward and is attached to the first pressing plate (23), the sample tube (36) is placed directly below the opening of the rubber tube (33), and the second pressing plate (24) is pressed onto the rubber tube (33) again. At this time, the rubber tube (33) is slowly and fully squeezed by the second pressing plate (24), so that the liquid in the rubber tube (33) passes through the filter cotton and is squeezed into the sample tube (36).

2. The food testing pretreatment device according to claim 1, characterized in that: A hinge block (27) is provided at the connection between the second pressing plate (24) and the bracket (20), the hinge block (27) is hinged to the second pressing plate (24), a sliding rod (29) is provided on a side of the hinge block (27) close to the bracket (20), a spring (210) is sleeved on the outer wall of the sliding rod (29), and a bolt (28) is rotatably connected to the hinge block (27); The sliding rod (29) is slidably connected to the bracket (20), the bolt (28) is threadedly connected to the bracket (20), and two ends of the spring (210) are respectively connected to the bracket (20) and the hinge block (27).

3. The food testing pretreatment device according to claim 2, characterized in that: A first latch hole is provided at one end of the second pressure plate (24) away from the hinge block (27), a plurality of second latch holes are provided at one end of the bracket (20) away from the hinge block (27), and a latch rod is inserted into both the first latch hole and the second latch hole; the plurality of second latch holes are distributed in the horizontal direction.

4. The food testing pretreatment device according to claim 1, characterized in that: A bottom plate (16) is slidably provided on the upper surface of the base (10), a surrounding frame (17) is provided on the bottom plate (16), a first support plate (34) is provided inside the surrounding frame (17), a plurality of limiting rings (35) are provided on the first support plate (34), and the sample tube (36) is clamped in the limiting ring (35).

5. The food testing pretreatment device according to claim 4, characterized in that: A pair of the surrounding frames (17) are provided on the bottom plate (16), wherein the first supporting plate (34) is provided in one of the surrounding frames (17), and the second supporting plate (41) is provided in the other of the surrounding frames (17); a cleaning device (40) is provided on the second supporting plate (41); The cleaning device (40) comprises a plurality of water receiving frames (42) arranged on the second support plate (41), a drainage pipe (43) connected to the water receiving frames (42), a flushing pipe (44) vertically arranged on the water receiving frames (42), a flushing hole (45) opened on the side wall of the flushing pipe (44), and a water supply device connected to the flushing pipe (44); The water receiving frame (42) corresponds to the rubber tube (33) one by one.

6. The food testing pretreatment device according to claim 5, characterized in that: A pair of first through holes (18) are provided on the bottom plate (16), and the pair of first through holes (18) are respectively provided in a pair of surrounding frames (17); A second through hole (11) is provided on the upper surface of the base (10), a lifting plate (12) is provided in the second through hole (11), and a lifting device for driving the lifting plate (12) to move up and down is provided in the base (10); The lifting device comprises an electric push rod (13) vertically arranged in the base (10), a limiting cylinder (14) vertically arranged in the base (10), and a limiting rod (15) fixedly connected to the lower side of the lifting plate (12); The telescopic end of the electric push rod (13) is fixedly connected to the lower side of the lifting plate (12), and the limiting rod (15) is slidably arranged in the limiting cylinder (14).

7. The food testing pretreatment device according to claim 6, characterized in that: A porous plate (37) is provided at the upper end of the sample tube (36).

8. The food testing pretreatment device according to claim 1, characterized in that: A horizontally arranged liquid adding pipe (51) is provided at the upper end of the bracket (20); the liquid adding pipe (51) is connected to a liquid supply device; a plurality of liquid adding nozzles (52) are provided at the lower side of the liquid adding pipe (51); the liquid adding nozzles (52) correspond one to one with the rubber tubes (33).

9. The food testing pretreatment device according to claim 1, characterized in that: A pair of limit strips (26) are provided on one side of the bracket (20) close to the first pressure plate (23); the pair of limit strips (26) are respectively provided on the upper and lower sides of the first pressure plate (23); a sliding groove is provided on one side of the limit strip (26) close to the first pressure plate (23); the upper and lower sides of the first pressure plate (23) are both slidably arranged in the sliding groove.

10. The food testing pretreatment device according to claim 1, characterized in that: The inner wall of the rubber tube (33) is provided with a plurality of protrusions.

Images