Sample pretreatment device for food testing

Abstract

This invention provides a sample pretreatment device for food testing, including a support assembly, a sample cup, a rinsing assembly, a crushing assembly, and a sampling assembly. The support assembly includes a base, a rotating table, and a lifting mechanism. The lifting mechanism includes a lifting rod vertically mounted on the rotating table, a first extension rod, and a second extension rod. The rinsing assembly includes a rinsing cylinder and a rinsing nozzle. The crushing assembly includes a crushing blade and a first motor. The sampling assembly is located on the second extension rod. The support assembly, crushing assembly, and sampling assembly work together to achieve automatic sample crushing and automatic sampling, improving the automation level of sample pretreatment. The sample cup and crushing blade are installed separately. Driven by the lifting mechanism and the rotating table, the crushing blade can enter the sample cup to crush the sample and also enter the rinsing cylinder for rinsing and cleaning. The sample cup can be removed for cleaning after sampling. The sample cup is lightweight, making cleaning easier, and there is no need to worry about water entering the motor, making it safer.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of food detection pretreatment, and particularly relates to a sample pretreatment device for food detection. BACKGROUND

[0002] In order to ensure food safety, it is necessary to detect components such as heavy metals and pesticides that may be contained in food, and the food is allowed to be sold on the market only after passing the detection. Before the detection, a sample extraction solution needs to be prepared. For fruit and vegetable food, the current method mainly uses tissue crushing method to prepare the extraction solution. The tissue crushing method is also called homogenate extraction method. In the operation, an appropriate amount of fruit and vegetable sample is taken, an extraction solvent (such as pure water) is added, and then crushing and filtering treatment are performed to obtain an extraction solution, and then harmful substances in the extraction solution are detected. The tissue crushing method has the advantages of simplicity, rapidness and good effect, but has the disadvantage that the crushing tool needs to be fully cleaned after each preparation to avoid interference of the sample residues on the crushing tool on the next sample preparation.

[0003] The pretreatment device includes a crushing tool and a filtering tool. The crushing tool is used for crushing treatment of the sample, and includes a sample container, a crushing cutter head and a motor. The sample container is used for containing an appropriate amount of fruit and vegetable sample. For a large sample, the sample should be cut into small pieces and then put into the sample container. The crushing cutter head is installed at the bottom of the inner cavity of the sample container. The motor at the bottom of the sample container drives the crushing cutter head to rotate at high speed to complete the crushing and sample preparation of the fruit and vegetable sample. In the prior art, the sample crushing tool is cleaned by manual cleaning. The crushing cutter head, the motor and the sample container are assembled as a whole, and the weight is relatively heavy, so the cleaning is relatively laborious. In addition, when the crushing cutter head and the sample container are cleaned, the motor at the bottom of the sample container is easy to be wet, which has an electrical hazard and is easy to cause the motor to be scrapped due to water ingress. SUMMARY

[0004] The application provides a sample pretreatment device for food detection, which aims to solve the problem that the crushing tool in the existing food pretreatment device is cleaned by manual cleaning, which is relatively laborious and is easy to cause the motor to be wet.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows: a sample pretreatment device for food detection is provided, which comprises:

[0006] A support assembly comprises a base, a rotating table and a lifting mechanism. The rotating table is rotatably arranged on the base about a vertical axis. The base forms a first placement station on one side of the rotating table and a washing station on the other side. The lifting mechanism comprises a lifting rod arranged on the rotating table, and first and second extension rods. The first and second extension rods are arranged at the top end of the lifting rod opposite to each other, and extend in the horizontal direction respectively.

[0007] The sample cup is placed at the first placement station;

[0008] A rinsing assembly includes a rinsing cylinder and a rinsing nozzle. The rinsing cylinder is located at the rinsing station and has an upward-opening rinsing chamber. A first drain pipe is connected to the bottom of the rinsing chamber, and the rinsing nozzle is located inside the rinsing chamber.

[0009] The crushing assembly includes a crushing blade and a first motor respectively disposed at one end of the first extension rod, the first motor being used to drive the crushing blade to rotate; and

[0010] The sampling component is located on the second extension rod;

[0011] When the crushing component is located above the first placement station, the sampling component is located above the rinsing station; when the crushing component is located above the rinsing station, the sampling component is located above the first placement station.

[0012] In one possible implementation, the food testing sample pretreatment device further includes a sample placement assembly, which comprises:

[0013] A rotating frame, rotatably mounted at the first placement station, has multiple receiving cavities along its circumference for accommodating the sample cup; and

[0014] The second motor, located on the base, is used to drive the rotating frame to rotate around the vertical axis.

[0015] In one possible implementation, the flushing assembly further includes a first solenoid valve disposed on the first drain pipe.

[0016] In one possible implementation, the sampling component includes:

[0017] A straw is vertically positioned downwards on the second extension rod;

[0018] A delivery pump, disposed on the second extension rod, the inlet end of the delivery pump being connected to the suction pipe; and

[0019] A delivery pipe, the inlet end of which is connected to the outlet end of the delivery pump.

[0020] In one possible implementation, the base further forms a second placement station between the first placement station and the rotating table, and a sewage tank is further formed between the rotating table and the rinsing station, the sewage tank being connected to a second drain pipe.

[0021] When the sampling component is located above the first placement station, the outlet end of the delivery pipe is located above the second placement station; when the sampling component is located above the rinsing station, the outlet end of the delivery pipe is located above the sewage tank.

[0022] In one possible implementation, the sampling assembly further includes a filter cartridge fitted around the periphery of the straw and detachably connected to its second extension rod, wherein the bottom and sidewalls of the filter cartridge are provided with multiple filter holes.

[0023] In one possible implementation, the lower surface of the second extension rod is provided with a mounting groove, the mounting groove is arranged around the suction tube, the inner wall of the mounting groove is provided with an annular magnet, and the upper outer periphery of the filter cartridge is provided with an iron ring.

[0024] In one possible implementation, the cutting tool includes:

[0025] The handle is vertically positioned downwards on the first extension rod. Multiple receiving grooves are formed around the outer periphery of the handle, arranged from top to bottom. Guide grooves are formed on the opposite side walls of the receiving grooves from top to bottom.

[0026] Multiple first blades are disposed in the receiving groove in a one-to-one correspondence, and the lower end of the first blade is hinged to the side wall of the receiving groove;

[0027] Multiple second blades are disposed in the receiving groove in a one-to-one correspondence. The lower end of the second blade is hinged to the upper end of the corresponding first blade, and the upper end of the second blade is slidably fitted into the guide groove.

[0028] Multiple adjusting rods are correspondingly provided on the tool holder, and the lower end of each adjusting rod is hinged to the upper end of the second tool body; and

[0029] A telescopic drive component is provided on the tool holder and is used to drive the adjusting rod to move up and down.

[0030] In one possible implementation, the handle is further provided with a protective cover plate, which covers the opening of the sample cup when the first and second blades are housed within the sample cup.

[0031] In one possible implementation, the telescopic drive is a cylinder.

[0032] Compared with the prior art, the beneficial effects of the food sample pretreatment device provided by the present invention are:

[0033] The food testing sample pretreatment device provided by this invention includes a support assembly, a sample cup, a rinsing assembly, a crushing assembly, and a sampling assembly. The support assembly includes a base, a rotating platform, and a lifting mechanism. The sample cup holds the fruit and vegetable samples to be crushed. The rotating platform drives the crushing and rinsing assemblies to rotate. When the crushing assembly rotates above the sample cup, the sampling assembly rotates above the rinsing assembly. The lifting rod descends, and the crushing blade enters the sample cup to crush the sample. The sampling assembly then enters the rinsing tube for rinsing and cleaning. After the sample is crushed, the lifting rod rises, and the rotating platform drives the crushing assembly to move above the rinsing tube. The sampling assembly moves above the sample cup, and the lifting rod descends, allowing the sampling assembly to enter the sample cup to sample the crushed liquid sample. The crushing blade then enters the rinsing tube below, where a rinsing nozzle sprays cleaning fluid to rinse the crushing blade, preventing residual sample on the blade from affecting the next sample crushing process.

[0034] This invention, by incorporating a crushing component and a sampling component, utilizes a rotary table and a lifting mechanism. The crushing component crushes the sample, while the sampling component collects the crushed sample for subsequent testing. The combined action of the support component, crushing component, and sampling component enables automated sample crushing and sampling, significantly improving the automation level of sample pretreatment.

[0035] This invention separates the sample cup and the crushing blade. Driven by a lifting mechanism and a rotating platform, the crushing blade can enter the sample cup to crush the sample and also enter the rinsing tube for cleaning. Compared to existing technologies that integrate the crushing container, crushing blade, and motor into a single unit, this invention allows for automatic rinsing, making it more convenient. The sample cup can be removed for cleaning after sampling; its lightweight design makes cleaning easier, and there is no risk of water entering the motor, enhancing safety. Attached Figure Description

[0036] Figure 1 A schematic diagram of the structure of a food testing sample pretreatment device provided in one embodiment of the present invention. Figure 1 ;

[0037] Figure 2 A schematic diagram of the structure of a food testing sample pretreatment device provided in one embodiment of the present invention. Figure 2 ;

[0038] Figure 3 This is an internal cross-sectional view of a food testing sample pretreatment apparatus provided in another embodiment of the present invention;

[0039] Figure 4 This is a partial schematic diagram of the first and second blades being housed in the receiving groove in one embodiment of the present invention;

[0040] Figure 5 This is a partial schematic diagram of the first and second blades opening from the receiving groove in one embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of the crusher blade in one embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the sampling component in one embodiment of the present invention;

[0043] Figure 8 This is a schematic diagram of the sample placement component and sampling cup in one embodiment of the present invention.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Sample pretreatment device for food testing;

[0046] 10. Support assembly; 11. Base; 111. Sewage tank; 112. Second drain pipe; 12. Rotary table; 13. Lifting mechanism; 131. Lifting rod; 132. First extension rod; 133. Second extension rod; 134. Magnet;

[0047] 20. Sample cup;

[0048] 30. Flushing assembly; 31. Flushing cylinder; 32. Flushing nozzle; 33. First drain pipe; 34. First solenoid valve;

[0049] 40. Crushing assembly; 41. Crushing blade; 411. Blade holder; 412. First blade body; 413. Second blade body; 414. Adjusting rod; 415. Telescopic drive component; 416. Receiving groove; 417. Guide groove; 418. Protective cover plate; 42. First motor;

[0050] 50. Sampling assembly; 51. Pipe; 52. Transfer pump; 53. Transfer pipe; 54. Filter cartridge; 541. Iron ring;

[0051] 60. Sample placement assembly; 61. Rotating frame; 62. Second motor;

[0052] 70. Measuring cup;

[0053] 80. Control the screen. Detailed Implementation

[0054] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0055] It should be noted that when an element is referred to as "fixed to," "fixed," or "attached" to another element, it can be directly on the other element or may have an intervening element. When an element is referred to as "connected to" or "connected to" another element, it can be directly connected to the other element or may have an intervening element. When an element is referred to as "set on" or "located on" another element, it can be directly on the other element or may have an intervening element. "Multiple" refers to two or more items. "At least one" refers to one or more items. "Several" refers to one or more items.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0057] Please refer to the following: Figures 1 to 8 The following describes the food testing sample pretreatment device 1 provided in the embodiments of the present invention.

[0058] Please see Figures 1 to 3 This invention provides a sample pretreatment device 1 for food testing, including a support assembly 10, a sample cup 20, a rinsing assembly 30, a crushing assembly 40, and a sampling assembly 50. The support assembly 10 includes a base 11, a rotating platform 12, and a lifting mechanism 13. The rotating platform 12 is rotatably mounted on the base 11 about a vertical axis. The base 11 has a first placement station on one side of the rotating platform 12 and a rinsing station on the other side. The lifting mechanism 13 includes a lifting rod 131, a first extension rod 132, and a second extension rod 133, all vertically mounted on the rotating platform 12. The first extension rod 132 and the second extension rod 133 are positioned opposite each other at the top of the lifting rod 131, and extend horizontally. The sample cup 20 is placed at the first placement station. The rinsing assembly 30... The system includes a rinsing cylinder 31 and a rinsing nozzle 32. The rinsing cylinder 31 is located at the rinsing station and has an upward-opening rinsing chamber. A first drain pipe 33 is connected to the bottom of the rinsing chamber, and the rinsing nozzle 32 is located inside the rinsing chamber. The crushing assembly 40 includes a crushing blade 41 and a first motor 42, which are respectively located at one end of the first extension rod 132. The first motor 42 is used to drive the crushing blade 41 to rotate. The sampling assembly 50 is located on the second extension rod 133. When the crushing assembly 40 is located above the first placement station, the sampling assembly 50 is located above the rinsing station. When the crushing assembly 40 is located above the rinsing station, the sampling assembly 50 is located above the first placement station.

[0059] Compared with the prior art, the beneficial effects of the food testing sample pretreatment device 1 provided in this embodiment of the invention are:

[0060] The food testing sample pretreatment device 1 provided in this embodiment of the invention includes a support assembly 10, a sample cup 20, a rinsing assembly 30, a crushing assembly 40, and a sampling assembly 50. The support assembly 10 includes a base 11, a rotating table 12, and a lifting mechanism 13. The sample cup 20 is used to hold fruit and vegetable samples to be crushed. The rotating table 12 can drive the crushing assembly 40 and the rinsing assembly 30 to rotate. When the crushing assembly 40 rotates above the sample cup 20, the sampling assembly 50 rotates above the rinsing assembly 30. The lifting rod 131 descends, the crushing blade 41 enters the sample cup 20 to crush the sample, and the sampling assembly 50 enters the rinsing cylinder 31 for rinsing and cleaning. After the sample is crushed, the lifting rod 131 rises, and then the rotating table 12 drives the crushing component 40 to move above the rinsing cylinder 31. The sampling component 50 moves above the sample cup 20, and the lifting rod 131 descends, allowing the sampling component 50 to enter the sample cup 20 to sample the crushed liquid sample. The crushing blade 41 then enters the rinsing cylinder 31 below, and the rinsing nozzle 32 sprays cleaning fluid to rinse the crushing blade 41, preventing any residual sample on the crushing blade 41 from affecting the crushing process of the next sample.

[0061] In this embodiment of the invention, by setting up a crushing component 40 and a sampling component 50, the crushing component 40 can crush the sample under the drive of the rotary table 12 and the lifting mechanism 13, and the sampling component 50 can sample the crushed sample for subsequent testing operations. The supporting component 10, the crushing component 40, and the sampling component 50 work together to achieve automatic sample crushing and automatic sampling, improving the automation level of sample pretreatment.

[0062] In this embodiment of the invention, the sample cup 20 and the crushing blade 41 are installed separately. Driven by the lifting mechanism 13 and the rotating table 12, the crushing blade 41 can enter the sample cup 20 to crush the sample and can also enter the rinsing tube 31 for rinsing and cleaning. Compared with the existing technology that designs the crushing container, crushing blade 41, and motor into an integrated structure, the crushing blade 41 can be automatically rinsed, which is more convenient. The sample cup 20 can be removed for cleaning after sampling. The sample cup 20 is lightweight, making cleaning easier, and there is no need to worry about water entering the motor, making it safer.

[0063] The food sample pretreatment device 1 provided in this embodiment of the invention can process solid foods such as fruits and vegetables to obtain the extract required for testing.

[0064] In this embodiment of the invention, the support component 10 includes a base 11, a rotating platform 12, and a lifting mechanism 13. The base 11 is used to provide stable support for the various components installed on it. The base 11 can be an iron or wooden platform, or a frame formed by welding and assembling profiles.

[0065] The rotary table 12 drives the lifting mechanism 13, the rinsing assembly 30, and the sampling assembly 50 to rotate, allowing the positions of the rinsing assembly 30 and the sampling assembly 50 to switch between the first placement station and the rinsing station, respectively. The rotary table 12 includes a table body and a rotation drive component. The table body is rotatably coupled to the base 11. The lifting mechanism 13 is mounted on the table body. The rotation drive component can be a motor or a hydraulic rotary motor, used to drive the table body to rotate along a vertical axis. The lifting mechanism 13 includes a lifting rod 131, a first extension rod 132, and a second extension rod 133. The lifting rod 131 can be a hydraulic telescopic rod, a pneumatic push rod, an electric telescopic rod, etc. The first extension rod 132 and the second extension rod 133 are arranged along the same straight line. The first extension rod 132 and the second extension rod 133 can be plastic rods or metal rods.

[0066] The sample cup 20 is detachably mounted at the first placement station. The sample cup 20 can be made of glass, stainless steel, plastic, or other materials and is used to hold the fruit and vegetable samples to be crushed. To avoid damaging the crushing blade 41, fruit samples such as peaches and apricots should be pitted before being placed in the cup. To prevent the sample cup 20 from shaking during sample crushing, the first placement station can be equipped with clamping mechanisms such as grippers or vises to hold and fix the sample cup 20. Large pieces of fruit and vegetable samples should be chopped or diced. For samples with low moisture content, water or other reagents can be added to the sample cup 20 when preparing the extract.

[0067] The rinsing assembly 30 is used to rinse and clean the crusher 41 or the sampling assembly 50 to prevent sample residue from interfering with subsequent sample preparation and sampling. The rinsing assembly 30 includes a rinsing cylinder 31 and multiple rinsing nozzles 32. The rinsing nozzles 32 are connected to a water inlet pipe. The multiple rinsing nozzles 32 are arranged circumferentially along the rinsing cylinder 31 and in multiple layers vertically to ensure thorough rinsing. The rinsing assembly 30 can spray liquids such as purified water and propanol during rinsing.

[0068] The crushing assembly 40 includes a crushing blade 41 and a first motor 42. The crushing blade 41 is vertically mounted downwards on the first extension rod 132, and the first motor 42 is positioned above the crushing blade 41 to drive the crushing blade 41 to rotate, thereby crushing the fruit and vegetable samples. The crushing blade 41 can be any commercially available blade head, and there are no restrictions on its specific shape and structure.

[0069] In this embodiment, the sampling component 50 is installed on the second extension rod 133. When the sampling component 50 moves to the sample cup 20, it can draw the extract from the sample cup 20 and transport the extract to a designated location. The extract can be transported to a measuring cup 70, which is placed in a refrigerator for refrigeration to prevent deterioration, and then tested after being transported to the laboratory.

[0070] Please see Figures 1 to 3 ,as well as Figure 8In some possible embodiments, the food testing sample pretreatment device 1 further includes a sample placement assembly 60, which includes a rotating frame 61 and a second motor 62. The rotating frame 61 is rotatably disposed at a first placement station, and the rotating frame 61 has a plurality of receiving cavities along its circumference for accommodating sample cups 20; the second motor 62 is disposed on the base 11 and is used to drive the rotating frame 61 to rotate around a vertical axis.

[0071] The sample placement assembly 60 provided in this embodiment is used to store multiple sample cups 20, and is suitable for applications requiring simultaneous pretreatment of multiple samples. The rotating frame 61 has multiple accommodating cavities along its circumference, and the second motor 62 can drive the rotating frame 61 to rotate. Figure 1 and Figure 2 As shown, each time the rotating frame 61 rotates, the sample cup 20 stored in the next receiving cavity moves to the first placement station.

[0072] Please see Figure 3 and Figure 7 In some possible embodiments, the rinsing assembly 30 also includes a first solenoid valve 34 disposed on the first drain pipe 33, which controls whether water in the rinsing cylinder 31 is discharged, thereby enabling the rinsing assembly 30 to have two cleaning modes: spraying and immersion.

[0073] When the first solenoid valve 34 is open, the water or cleaning fluid sprayed from the rinsing nozzle 32 can be discharged at any time, which is suitable for spray rinsing. When the first solenoid valve 34 is closed, the water or cleaning fluid sprayed from the rinsing nozzle 32 can accumulate in the rinsing cylinder 31, which is suitable for soaking cleaning. It also makes it easy for the sampling component 50 to draw water or cleaning fluid from the rinsing cylinder 31 to rinse its own internal pipelines.

[0074] Please see Figures 1 to 3 ,as well as Figure 7 In some possible embodiments, the sampling assembly 50 includes a pipette 51, a delivery pump 52, and a delivery tube 53. The pipette 51 is vertically downwardly disposed on the second extension rod 133; the delivery pump 52 is disposed on the second extension rod 133, and the inlet end of the delivery pump 52 is connected to the pipette 51; the inlet end of the delivery tube 53 is connected to the outlet end of the delivery pump 52.

[0075] In this embodiment, the sampling component 50 includes a pipette 51, a delivery pump 52, and a delivery tube 53. When sample extract needs to be drawn, the lifting rod 131 moves the sampling component 50 downward, the pipette 51 extends into the sample cup 20, and the delivery pump 52 operates to deliver the extract through the delivery tube 53 to the corresponding container (such as a measuring cup 70). When cleaning is required, the lifting rod 131 moves the sampling component 50 downward, the pipette 51 extends into the rinsing cup and is below the liquid surface, and the delivery pump 52 operates to deliver water or cleaning solution through the delivery tube 53 to the corresponding container (such as a trash can) to rinse the internal pipes.

[0076] Please see Figures 1 to 3 In some possible embodiments, a second placement station is also formed between the base 11 and the rotary table 12. Figure 2 and Figure 3 The medium measuring cup is placed at the second placement station, and a sewage tank 111 is formed between the rotating table 12 and the rinsing station. The sewage tank 111 is connected to the second drain pipe 112. When the sampling component 50 is located above the first placement station, the outlet end of the delivery pipe 53 is located above the second placement station. When the sampling component 50 is located above the rinsing station, the outlet end of the delivery pipe 53 is located above the sewage tank 111.

[0077] In this embodiment, the second placement station is used to place the measuring cup 70. When the sampling component 50 is used to draw the sample extract, the measuring cup 70 can receive the extract flowing out of the delivery tube 53. When the sampling component 50 is being cleaned, the drain tank 111 is used to receive the water or cleaning solution flowing out of the delivery tube 53.

[0078] Please see Figures 1 to 3 ,as well as Figure 7 In some possible embodiments, the sampling assembly 50 further includes a filter cartridge 54, which is sleeved around the periphery of the pipette 51 and detachably connected to its second extension rod 133. The bottom and sidewalls of the filter cartridge 54 are provided with multiple filter holes.

[0079] In this embodiment, by setting a filter cartridge 54 around the outside of the straw 51, the extract entering the straw 51 can be filtered, avoiding fruit and vegetable residue from clogging the straw 51 or the delivery tube 53 due to incomplete crushing. The filter cartridge 54 can be rinsed by the rinsing assembly 30 or manually cleaned. The filter cartridge 54 is detachably installed on the second extension rod 133 for easy replacement and removal for cleaning.

[0080] Please see Figure 7 In some possible embodiments, the lower surface of the second extension rod 133 is provided with a mounting groove, the mounting groove is arranged around the suction tube 51, the inner wall of the mounting groove is provided with an annular magnet 134, and the upper outer periphery of the filter cartridge 54 is provided with an iron ring 541.

[0081] In this embodiment, the filter cartridge 54 is detachably connected to the second extension rod 133 and is fixed by magnetic attraction, which facilitates the installation and removal of the filter cartridge 54 for rinsing.

[0082] The crushing blade 41 enters the sample cup 20 from top to bottom. When the sample cup 20 contains fruit and vegetable samples, it will obstruct the downward movement of the crushing blade 41, and the crushing blade 41 may not reach the expected height. If the first motor 42 is started rashly before the crushing blade 41 has moved down to the preset position, the rotation of the crushing blade 41 may cause the sample to splash out from the top opening of the sample cup 20, which may splash onto the surface of the processing device or the operator.

[0083] To resolve the above issues, please refer to Figures 4 to 6 In some possible embodiments, the breaker 41 includes a handle 411, a first blade 412, a second blade 413, an adjusting rod 414, and a telescopic drive member 415. The handle 411 is vertically mounted on the first extension rod 132. Multiple receiving grooves 416 are formed along the outer periphery of the handle 411, arranged from top to bottom. Guide grooves 417 are formed on opposite side walls of the receiving grooves 416 from top to bottom. Multiple first blades 412 are correspondingly positioned in the receiving grooves 416. The lower end of the blade body 412 is hinged to the side wall of the receiving groove 416; a plurality of second blade bodies 413 are correspondingly provided in the receiving groove 416, the lower end of the second blade body 413 is hinged to the upper end of the corresponding first blade body 412, and the upper end of the second blade body 413 is slidably fitted in the guide groove 417; a plurality of adjusting rods 414 are correspondingly provided in the handle 411, the lower end of the adjusting rod 414 is hinged to the upper end of the second blade body 413; a telescopic drive member 415 is provided in the handle 411 and is used to drive the adjusting rods 414 to move up and down.

[0084] In this embodiment, the breaker blade 41 includes a handle 411, a first blade 412, a second blade 413, an adjusting rod 414, and a telescopic drive member 415. The telescopic drive member 415 and the adjusting rod 414 are used to push the first blade 412 and the second blade 413 to open and close, so that the first blade 412 and the second blade 413 can be received in the receiving groove 416 (e.g., Figure 4 It can also open from within the receiving groove 416 (such as...). Figure 5 ).

[0085] As the cutting blade 41 moves downward, the telescopic drive 415 drives the adjusting rod 414 to move upward, causing the first blade 412 and the second blade 413 to move as follows: Figure 4 As shown, the breaker 41 is fully housed within the receiving groove 416 of the shank 411, making it easier for the breaker 41 to move downwards. The telescopic drive 415 can be a drive structure such as a cylinder or an electric telescopic rod.

[0086] To further reduce the obstruction when the breaker 41 moves downward, the lower end of the shank 411 can be designed as a round or conical shape.

[0087] Please see Figure 3 and Figure 6 In some possible embodiments, the handle 411 is also provided with a protective cover plate 418. When the first blade 412 and the second blade 413 are housed in the sample cup 20, the protective cover plate 418 covers the opening of the sample cup 20, which can prevent liquid from splashing out of the opening when the sample cup 20 is broken or rinsed.

[0088] In some possible embodiments, the telescopic drive 415 is a cylinder, and the operation of the telescopic drive 415, the rotary table 12, the lifting mechanism 13, the flushing assembly 30, the first motor 42, the second motor 62, and other mechanisms can be controlled by the control screen 80. The control screen 80 is mounted on the base 11.

[0089] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present invention specification has recorded each combined embodiment and can support different combined embodiments.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sample pretreatment device for food inspection, characterized by comprising: The device comprises: a support assembly comprising a base, a rotating table and a lifting mechanism, the rotating table being rotatably arranged on the base about a vertical axis, the base being formed with a first placement station on one side of the rotating table and a washing station on the other side; the lifting mechanism comprising a lifting rod arranged on the rotating table, and a first extension rod and a second extension rod, the first extension rod and the second extension rod being oppositely arranged on the top end of the lifting rod, the first extension rod and the second extension rod extending in the horizontal direction respectively; a sample cup arranged on the first placement station; a washing assembly comprising a washing cylinder and a washing nozzle, the washing cylinder being arranged on the washing station and having a washing cavity with an upward opening, the bottom of the washing cavity being connected with a first drain pipe, the washing nozzle being arranged in the washing cavity; a crushing assembly comprising a crushing knife and a first motor arranged on one end of the first extension rod respectively, the first motor being used to drive the crushing knife to rotate; and a sampling assembly arranged on the second extension rod; when the crushing assembly is located above the first placement station, the sampling assembly is located above the washing station, and when the crushing assembly is located above the washing station, the sampling assembly is located above the first placement station; the rotating table comprises a table body and a rotating drive member, the table body being rotatably connected with the base, and the lifting mechanism being arranged on the table body; the crushing knife comprises: a knife handle being vertically arranged downward on the first extension rod, a plurality of accommodating grooves being formed on the outer periphery of the knife handle along the circumferential direction of the knife handle, the accommodating grooves being arranged from top to bottom, and a guide groove being formed on the two side walls of each accommodating groove from top to bottom; a plurality of first knife bodies being correspondingly arranged in the accommodating grooves, the lower end of each first knife body being hingedly connected with the side wall of the accommodating groove; a plurality of second knife bodies being correspondingly arranged in the accommodating grooves, the lower end of each second knife body being hingedly connected with the upper end of the corresponding first knife body, and the upper end of each second knife body being slidingly fitted in the guide groove; a plurality of adjusting rods being correspondingly arranged on the knife handle, the lower end of each adjusting rod being hingedly connected with the upper end of the corresponding second knife body; and a telescopic drive member being arranged on the knife handle and used to drive the adjusting rods to move up and down.

2. The sample pretreatment device for food detection according to claim 1, characterized in that, The device further comprises a sample placement assembly, the sample placement assembly comprising: a rotating frame being rotatably arranged on the first placement station, a plurality of accommodating cavities being formed on the rotating frame along the circumferential direction of the rotating frame, and the accommodating cavities being used to accommodate the sample cup; and a second motor being arranged on the base and used to drive the rotating frame to rotate about a vertical axis.

3. The sample pretreatment device for food detection according to claim 1, wherein The washing assembly further comprises a first electromagnetic valve arranged on the first drain pipe.

4. The sample pretreatment device for food inspection according to claim 1, wherein The sampling assembly comprises: a suction pipe being vertically arranged downward on the second extension rod; a conveying pump being arranged on the second extension rod, the inlet end of the conveying pump being connected with the suction pipe; and a conveying pipe, the inlet end of the conveying pipe being connected with the outlet end of the conveying pump.

5. The sample pretreatment device for food inspection according to claim 4, wherein The base is further formed with a second placement station between the first placement station and the rotating table, and a sewage pool between the rotating table and the washing station, the sewage pool being communicated with a second drain pipe. When the sampling assembly is positioned above the first placement station, the outlet end of the delivery pipe is positioned above the second placement station, and when the sampling assembly is positioned above the flushing station, the outlet end of the delivery pipe is positioned above the sewage tank.

6. The sample pretreatment device for food inspection according to claim 4, wherein The sampling assembly further comprises a filter cartridge, which is sleeved on the outer periphery of the suction pipe and detachably connected with the second extension rod, and the bottom and the side wall of the filter cartridge are both provided with a plurality of filter holes.

7. The sample pretreatment device for food inspection according to claim 6, wherein The lower surface of the second extension rod is provided with a mounting groove, which surrounds the suction pipe, and the inner wall of the mounting groove is provided with an annular magnet, and the upper end of the outer periphery of the filter cartridge is provided with an iron ring.

8. The sample pretreatment device for food inspection according to claim 1, wherein The knife handle is further provided with a protective cover plate, which covers the opening of the sample cup when the first knife body and the second knife body are accommodated in the sample cup.

9. The sample pretreatment device for food inspection according to claim 1, wherein The telescopic driving member is a pneumatic cylinder.

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