A food microorganism detection sample pretreatment device

Abstract

The utility model discloses a food microbiological detection sample pretreatment device relates to food detection technical field. The utility model discloses a processing jar is provided with feeding assembly at the top of processing jar, and feeding assembly includes the jar cover of screw connection at the top of processing jar, and the bottom center rotation is connected with the rotating shaft of jar cover, and the bottom end of rotating shaft extends to the inside of processing jar and is fixedly connected with blade, and the top rear end of jar cover is penetrated with liquid adding pipe, and the top of jar cover is fixedly connected with hopper. The utility model discloses a blade to the food of not high hardness is broken, and is broken to the food of higher hardness through the broken roll, has solved the inconvenient problem of the present food broken processing, and through the screw rod drives L type frame and pressure sensor to go up and down, and through pressure sensor to control the culture solution liquid level in the quantitative cylinder, has solved the inconvenient problem of the present culture solution quantitative liquid.

Description

Technical Field

[0001] This utility model belongs to the field of food testing technology, and in particular relates to a food microbial testing sample pretreatment device. Background Technology

[0002] Food testing refers to a scientific and technological activity that uses professional technical means and instruments, and follows national, industry or international standard methods, to test and analyze various indicators of raw materials, auxiliary materials, semi-finished products and finished products of food in order to evaluate their quality, safety, nutrition and authenticity. Microbiological testing is one of the important items in food testing. In order to facilitate microbiological testing of food, pretreatment devices are usually used to pre-treat the food.

[0003] A pretreatment device for microbial detection is disclosed in the existing authorization announcement document CN219218016U, including a culture tank, a sampling dish is provided on the culture tank, a culture medium is provided inside the culture tank, and a connecting assembly is also included. The connecting assembly includes a threaded tube, a spring and a base. The threaded tube is fixedly connected to the inner wall of the culture tank, and the two springs are fixedly connected to the inner wall of the culture tank.

[0004] However, it still has the following drawbacks in practical use:

[0005] 1. The pretreatment device described above places the food sample into the culture tank through a sampling dish and shakes the food sample to mix microorganisms through the culture tank. However, during use, it is not convenient to break the food sample. Due to the large volume of the food sample, the distribution of microorganisms in the culture medium is uneven, which affects the accuracy of the test results.

[0006] 2. The pretreatment device described above discharges the culture medium from the culture tank through the discharge pipe. However, during use, it is not convenient to discharge the culture medium in a quantitative manner, which makes it inconvenient for subsequent dilution or testing of the culture medium.

[0007] To address these issues, we provide a food microbiology testing sample pretreatment device. Utility Model Content

[0008] The purpose of this invention is to provide a food microbial testing sample pretreatment device. It uses blades to crush foods with low hardness and crushing rollers to crush foods with high hardness, thus solving the problem of inconvenient food crushing in existing devices. At the same time, it uses a threaded rod to drive the L-shaped frame and pressure sensor to lift and lower, and uses the pressure sensor to control the level of culture medium entering the quantitative cylinder, thus solving the problem of inconvenient quantitative dispensing of culture medium in existing devices.

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0010] This utility model relates to a food microbiology testing sample pretreatment device, comprising a processing tank, a feeding assembly at the top of the processing tank, the feeding assembly including a tank cover threadedly connected to the top of the processing tank, a rotating shaft rotatably connected to the bottom center of the tank cover, the bottom end of the rotating shaft extending into the interior of the processing tank and fixedly connected to a blade, a liquid addition pipe penetrating through the rear end of the top of the tank cover, a hopper fixedly connected to the top of the tank cover, first sliders movably connected to the front and rear ends of both sides inside the hopper, a crushing roller rotatably connected between adjacent front and rear first sliders, and a liquid discharge assembly on one side of the processing tank, the liquid discharge assembly including a metering cylinder fixedly connected to one side of the processing tank. The bottom of the metering cylinder is fixedly connected to a first connecting pipe. The bottom end of the first connecting pipe is fixedly connected to a second connecting pipe and a third connecting pipe via a tee connector. The end of the second connecting pipe away from the first and third connecting pipes extends into the interior of the processing tank. Solenoid valves are installed on both the second and third connecting pipes. The rear end of the metering cylinder is fixedly connected to a mounting column. A threaded rod is rotatably connected inside the mounting column. The top of the threaded rod extends to the outside of the mounting column and is fixedly connected to a handwheel. A second slider is threadedly connected to the threaded rod. An L-shaped frame is fixedly connected to the front end face of the second slider. A pressure sensor is fixedly connected to the bottom of the longitudinal support arm of the L-shaped frame.

[0011] A further feature of this invention is that a first drive motor is fixedly connected to the top center of the can lid via a first motor frame, and the output shaft of the first drive motor is fixedly connected to the top end of the rotating shaft.

[0012] The present invention is further configured such that: a sliding rod is fixedly connected inside the sliding groove on the front and rear end faces of the hopper; a cover plate is rotatably connected to the top of the hopper; the first slider is slidably sleeved on both sides of the outer wall of the sliding rod; and a telescopic cover is fixedly connected to both sides of the outer wall of the first slider.

[0013] A further feature of this invention is that a first hydraulic cylinder is fixedly connected to both the front and rear ends of the hopper, the output shaft of the first hydraulic cylinder is fixedly connected to an L-shaped plate, a connecting rod is fixedly connected to one side of the outer wall of the L-shaped plate, and the end of the connecting rod away from the L-shaped plate extends into the groove on the front and rear ends of the hopper and is fixedly connected to one side of the outer wall of the first slider.

[0014] A further feature of this invention is that a second drive motor is fixedly connected to the front end face of the first slider located at the front via a second motor frame, the output shaft of the second drive motor is fixedly connected to the front end of the crushing roller, and the rear end of the crushing roller is rotatably connected to the first slider located at the rear.

[0015] The present invention is further configured such that: a mounting bracket is fixedly connected to both the front and rear ends of the bottom of the metering cylinder; the side of the mounting bracket away from the metering cylinder is fixedly connected to the outer wall of the processing tank; a piston plate is movably connected inside the metering cylinder; a piston shaft is fixedly connected to the center of the upper surface of the piston plate; the top end of the piston shaft extends to the upper part of the metering cylinder and is fixedly connected to a movable plate; a second hydraulic cylinder is fixedly connected to the front end face of the metering cylinder; and the output shaft of the second hydraulic cylinder is fixedly connected to the front end of the lower surface of the movable plate.

[0016] A further feature of this invention is that a fixing rod is fixedly connected below the front end face of the mounting column, and the front end of the fixing rod is fixedly connected to the rear end face of the metering cylinder.

[0017] A further feature of this invention is that scale lines are provided on both outer walls of the mounting column, and pointers are fixedly connected to both outer walls of the L-shaped frame.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model, by setting up a feeding assembly, adds food into the processing tank through a hopper. When the food has low hardness, the first drive motor is activated, which drives the blades to rotate via a rotating shaft. The rotating blades crush the food sample in the processing tank. When the food has high hardness, the first slider drives the crushing roller to move, and the second drive motor is activated. The second drive motor drives the crushing roller to rotate, and the crushing roller crushes the food sample with higher hardness. Then, liquid is added into the processing tank through a liquid addition pipe to facilitate the crushing process of the food sample and to facilitate the pretreatment of the food sample.

[0020] 2. This utility model, by setting up a liquid dispensing component, allows for the rotation of a handwheel, which in turn drives a threaded rod to rotate. The threaded rod, via a second slider, raises and lowers an L-shaped frame. When the L-shaped plate and pressure sensor reach a specified height, the handwheel is stopped. Then, the solenoid valve on the second connecting pipe is opened, and the second hydraulic cylinder is activated. The second hydraulic cylinder, via a movable plate, drives a piston plate, creating a negative pressure state inside the metering cylinder. Under this negative pressure, the food sample culture medium in the processing tank enters the metering cylinder through the second and first connecting pipes. When the movable plate contacts the pressure sensor, the pressure sensor closes the solenoid valve on the second connecting pipe and opens the solenoid valve on the third connecting pipe, facilitating quantitative dispensing from the processing tank and quantitative dispensing of the food sample culture medium. This facilitates subsequent microbial testing of the food sample culture medium. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the feeding assembly of this utility model.

[0024] Figure 3 This is a schematic diagram of the blade of this utility model.

[0025] Figure 4 This is a schematic diagram of the structure of the hopper of this utility model.

[0026] Figure 5 This is a structural disassembly diagram of the crushing roller of this utility model.

[0027] Figure 6 This is a schematic diagram of the liquid dispensing component of this utility model.

[0028] Figure 7 This is a partial cross-sectional view of the metering cylinder of this utility model.

[0029] Figure 8 This is a structural disassembly diagram of the mounting column and L-shaped frame of this utility model.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1-Processing tank, 2-Feeding assembly, 201-Tank cover, 202-Blade, 202a-Rotating shaft, 202b-First motor frame, 202c-First drive motor, 203-Liquid filling pipe, 204-Hopper, 204a-Slide bar, 204b-Cover plate, 205-First slider, 205a-First hydraulic cylinder, 205b-L-shaped plate, 205c-Connecting rod, 205d-Telescopic cover, 206-Crushing roller, 206a-Second motor frame, 206b-Second drive motor, 3-Liquid discharge assembly, 301 - Metering cylinder, 301a- Mounting bracket, 301b- First connecting pipe, 301c- Tee connector, 302- Second connecting pipe, 302a- Solenoid valve, 303- Third connecting pipe, 304- Movable plate, 304a- Piston shaft, 304b- Piston plate, 304c- Second hydraulic cylinder, 305- Mounting column, 305a- Fixed rod, 305b- Scale line, 306- Threaded rod, 306a- Handwheel, 306b- Second slider, 307- L-shaped bracket, 307a- Pointer, 308- Pressure sensor. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this is the first embodiment of the present invention. This embodiment provides a food microbial detection sample pretreatment device, including a treatment tank 1. The top of the treatment tank 1 is provided with a feeding assembly 2. The feeding assembly 2 includes a tank cover 201, a blade 202, a liquid adding pipe 203, a hopper 204, a first slider 205, and a crushing roller 206. The blade 202 crushes food with low hardness, and the crushing roller 206 crushes food with high hardness, thus solving the problem of the inconvenience of crushing food in existing methods.

[0035] Specifically, the can lid 201 is threaded onto the top of the processing tank 1. A rotating shaft 202a is rotatably connected to the bottom center of the can lid 201. The bottom end of the rotating shaft 202a extends into the interior of the processing tank 1 and is fixedly connected to a blade 202. A liquid filling pipe 203 passes through the rear end of the top of the can lid 201. A hopper 204 is fixedly connected to the top of the can lid 201. First sliders 205 are movably connected to the front and rear ends of both sides inside the hopper 204. Crushing rollers 206 are rotatably connected between adjacent first sliders 205. The can lid 201 is designed to... The processing tank 1 is sealed. The blade 202 is used to crush food with low hardness inside the processing tank 1. The rotating shaft 202a is used to install the blade 202 and drive the blade 202 to rotate. The liquid addition pipe 203 is used to add liquid into the processing tank 1. The hopper 204 is used to add food samples into the processing tank 1. The first slider 205 is used to install the crushing roller 206 and adjust the spacing of the crushing roller 206. The crushing roller 206 is used to crush food with high hardness.

[0036] Furthermore, a first drive motor 202c is fixedly connected to the top center of the can lid 201 via a first motor frame 202b, and the output shaft of the first drive motor 202c is fixedly connected to the top end of the rotating shaft 202a.

[0037] Slide rods 204a are fixedly connected inside the sliding grooves on the front and rear end faces of the hopper 204. A cover plate 204b is rotatably connected to the top of the hopper 204. The first slider 205 is slidably sleeved on both sides of the outer wall of the slide rod 204a. Telescopic covers 205d are fixedly connected to both sides of the outer wall of the first slider 205.

[0038] A first hydraulic cylinder 205a is fixedly connected to both the front and rear ends of the hopper 204. An L-shaped plate 205b is fixedly connected to the output shaft of the first hydraulic cylinder 205a. A connecting rod 205c is fixedly connected to one side of the outer wall of the L-shaped plate 205b. The end of the connecting rod 205c away from the L-shaped plate 205b extends into the groove on the front and rear ends of the hopper 204 and is fixedly connected to one side of the outer wall of the first slider 205.

[0039] A second drive motor 206b is fixedly connected to the front end face of the first slider 205 located at the front end via a second motor frame 206a. The output shaft of the second drive motor 206b is fixedly connected to the front end of the crushing roller 206, and the rear end of the crushing roller 206 is rotatably connected to the first slider 205 located at the rear end.

[0040] The operation process of this embodiment is as follows: food is added to the processing tank 1 through the hopper 204. When the food has low hardness, the first drive motor 202c is started. The first drive motor 202c drives the blade 202 to rotate through the rotating shaft 202a. The rotating blade 202 crushes the food sample in the processing tank 1. When the food has high hardness, the first slider 205 drives the crushing roller 206 to move, and the second drive motor 206b is started. The second drive motor 206b drives the crushing roller 206 to rotate, and the crushing roller 206 crushes the food sample with high hardness. Then, liquid is added to the processing tank 1 through the liquid addition pipe 203, thereby realizing the pretreatment of the food sample.

[0041] Example 2

[0042] Please see Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, this is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs from the previous embodiment in that: a liquid outlet assembly 3 is also provided on one side of the processing tank 1. The liquid outlet assembly 3 includes a metering cylinder 301, a second connecting pipe 302, a third connecting pipe 303, a mounting column 305, a threaded rod 306, an L-shaped frame 307, and a pressure sensor 308. The threaded rod 306 drives the L-shaped frame 307 and the pressure sensor 308 to move up and down, and the pressure sensor 308 controls the level of the culture medium entering the metering cylinder 301, thus solving the problem of the existing inconvenience in metering the culture medium.

[0043] Specifically, a metering cylinder 301 is fixedly connected to one side of the processing tank 1. A first connecting pipe 301b is fixedly connected to the bottom of the metering cylinder 301. The bottom end of the first connecting pipe 301b is fixedly connected to a second connecting pipe 302 and a third connecting pipe 303 via a three-way connector 301c. The end of the second connecting pipe 302 away from the first connecting pipe 301b and the third connecting pipe 303 extends into the interior of the processing tank 1. Solenoid valves 302a are installed on both the second connecting pipe 302 and the third connecting pipe 303. A mounting post 305 is fixedly connected to the rear end of the metering cylinder 301. A threaded rod 306 is rotatably connected inside the mounting post 305. The top end of the threaded rod 306 extends to the outside of the mounting post 305 and is fixedly connected to a handwheel 306a. A second slider 306b is threadedly connected to the threaded rod 306. An L-shaped frame 307 is fixedly connected to the front end face of the second slider 306b. A pressure sensor 308 is fixedly connected to the bottom of the longitudinal support arm of the L-shaped frame 307. The metering cylinder 301… The system is designed to quantitatively dispense the culture medium from the processing tank 1. The first connecting pipe 301b and the three-way connector 301c connect the metering cylinder 301, the second connecting pipe 302, and the third connecting pipe 303. The second connecting pipe 302 connects the metering cylinder 301 to the processing tank 1, and the third connecting pipe 303 discharges the food sample culture medium from the metering cylinder 301. The solenoid valve 302a controls the opening and closing of the second and third connecting pipes 302 and 303. The mounting post 305 mounts the threaded rod 306 and other structures. The threaded rod 306 and the second slider 306b drive the L-shaped frame 307. The handwheel 306a rotates the threaded rod 306. The L-shaped frame 307 mounts the pressure sensor 308, which is electrically connected to the solenoid valve 302a and controls its opening and closing.

[0044] Furthermore, mounting brackets 301a are fixedly connected to the front and rear ends of the bottom of the metering cylinder 301. The side of the mounting bracket 301a away from the metering cylinder 301 is fixedly connected to the outer wall of the processing tank 1. A piston plate 304b is movably connected inside the metering cylinder 301. A piston shaft 304a is fixedly connected to the center of the upper surface of the piston plate 304b. The top end of the piston shaft 304a extends to the outside of the metering cylinder 301 and is fixedly connected to a movable plate 304. A second hydraulic cylinder 304c is fixedly connected to the front end face of the metering cylinder 301. The output shaft of the second hydraulic cylinder 304c is fixedly connected to the front end of the lower surface of the movable plate 304.

[0045] A fixing rod 305a is fixedly connected to the lower front end face of the mounting column 305, and the front end of the fixing rod 305a is fixedly connected to the rear end face of the metering cylinder 301.

[0046] The mounting column 305 has scale lines 305b on both outer walls, and the L-shaped bracket 307 has pointers 307a fixedly connected to both outer walls.

[0047] The rest of the structure is the same as in Example 1.

[0048] The operation process of this embodiment is as follows: The handwheel 306a is rotated, which drives the threaded rod 306 to rotate. The threaded rod 306 drives the L-shaped frame 307 to rise and fall via the second slider 306b. When the L-shaped plate 205b and the pressure sensor 308 reach the specified height, the handwheel 306a is stopped. Then, the solenoid valve 302a on the second connecting pipe 302 is opened, and the second hydraulic cylinder 304c is activated. The second hydraulic cylinder 304c drives the piston plate 304b to move via the movable plate 304, thereby creating a negative pressure state inside the metering cylinder 301. Under negative pressure, the food sample culture medium in the processing tank 1 enters the metering cylinder 301 through the second connecting pipe 302 and the first connecting pipe 301b. When the movable plate 304 contacts the pressure sensor 308, the pressure sensor 308 closes the solenoid valve 302a on the second connecting pipe 302 and opens the solenoid valve 302a on the third connecting pipe 303, thus realizing the metered dispensing of liquid from the processing tank 1.

[0049] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A food microbial testing sample pretreatment device, comprising a processing tank (1), characterized in that: The top of the processing tank (1) is provided with a feeding assembly (2), and the feeding assembly (2) includes a tank cover (201) threadedly connected to the top of the processing tank (1). A rotating shaft (202a) is rotatably connected to the bottom center of the tank cover (201), and the bottom end of the rotating shaft (202a) extends into the interior of the processing tank (1) and is fixedly connected with a blade (202). A liquid addition pipe (203) passes through the top rear end of the tank cover (201), and a hopper (204) is fixedly connected to the top of the tank cover (201). The front and rear ends of both sides of the hopper (204) are movably connected with first sliders (205), and a crushing roller (206) is rotatably connected between adjacent first sliders (205). A liquid discharge assembly (3) is also provided on one side of the processing tank (1), and the liquid discharge assembly (3) includes a metering cylinder (301) fixedly connected to one side of the processing tank (1).

2. The food microbial detection sample pretreatment device according to claim 1, characterized in that, The bottom of the metering cylinder (301) is fixedly connected to a first connecting pipe (301b), and the bottom end of the first connecting pipe (301b) is fixedly connected to a second connecting pipe (302) and a third connecting pipe (303) via a three-way connector (301c). The end of the second connecting pipe (302) away from the first connecting pipe (301b) and the third connecting pipe (303) extends into the interior of the processing tank (1), and both the second connecting pipe (302) and the third connecting pipe (303) are equipped with solenoid valves (302a). The rear end of 301) is fixedly connected to a mounting column (305), and the mounting column (305) is rotatably connected to a threaded rod (306). The top end of the threaded rod (306) extends to the outside of the mounting column (305) and is fixedly connected to a handwheel (306a). A second slider (306b) is threadedly connected to the threaded rod (306). An L-shaped frame (307) is fixedly connected to the front end face of the second slider (306b), and a pressure sensor (308) is fixedly connected to the bottom of the longitudinal support arm of the L-shaped frame (307).

3. The food microbial detection sample pretreatment device according to claim 2, characterized in that, The top center of the can lid (201) is fixedly connected to a first drive motor (202c) via a first motor frame (202b), and the output shaft of the first drive motor (202c) is fixedly connected to the top end of the rotating shaft (202a).

4. The food microbial detection sample pretreatment device according to claim 2, characterized in that, The hopper (204) has a sliding rod (204a) fixedly connected inside the sliding groove on the front and rear end faces, and a cover plate (204b) is rotatably connected to the top of the hopper (204). The first slider (205) is slidably sleeved on both sides of the outer wall of the sliding rod (204a), and a telescopic cover (205d) is fixedly connected to both sides of the outer wall of the first slider (205).

5. The food microbial detection sample pretreatment device according to claim 4, characterized in that, A first hydraulic cylinder (205a) is fixedly connected to both the front and rear ends of the hopper (204), and an L-shaped plate (205b) is fixedly connected to the output shaft of the first hydraulic cylinder (205a). A connecting rod (205c) is fixedly connected to one side of the outer wall of the L-shaped plate (205b), and the end of the connecting rod (205c) away from the L-shaped plate (205b) extends into the groove on the front and rear ends of the hopper (204) and is fixedly connected to one side of the outer wall of the first slider (205).

6. The food microbial detection sample pretreatment device according to claim 2, characterized in that, A second drive motor (206b) is fixedly connected to the front end face of the first slider (205) located at the front end via a second motor frame (206a), and the output shaft of the second drive motor (206b) is fixedly connected to the front end of the crushing roller (206), and the rear end of the crushing roller (206) is rotatably connected to the first slider (205) located at the rear end.

7. The food microbial detection sample pretreatment device according to claim 2, characterized in that, The bottom front and rear ends of the metering cylinder (301) are fixedly connected to the mounting bracket (301a), and the side of the mounting bracket (301a) away from the metering cylinder (301) is fixedly connected to the outer wall of the processing tank (1). The inside of the metering cylinder (301) is movably connected to the piston plate (304b), and the center of the upper surface of the piston plate (304b) is fixedly connected to the piston shaft (304a). The top end of the piston shaft (304a) extends to the outside of the metering cylinder (301) and is fixedly connected to the movable plate (304). The front end face of the metering cylinder (301) is fixedly connected to the second hydraulic cylinder (304c), and the output shaft of the second hydraulic cylinder (304c) is fixedly connected to the front end of the lower surface of the movable plate (304).

8. The food microbial detection sample pretreatment device according to claim 2, characterized in that, A fixing rod (305a) is fixedly connected to the lower front end face of the mounting column (305), and the front end of the fixing rod (305a) is fixedly connected to the rear end face of the metering cylinder (301).

9. The food microbial detection sample pretreatment device according to claim 2, characterized in that, The mounting column (305) has scale lines (305b) on both outer walls, and pointers (307a) are fixedly connected to both outer walls of the L-shaped frame (307).

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