Rapid screening device and detection method for milk adulteration

Abstract

The invention discloses a raw milk adulteration rapid screening device and a detection method.The raw milk adulteration rapid screening device comprises a supporting frame and further comprises a chain plate conveying belt, a detection mechanism and a placement seat, the chain plate conveying belt is rotationally connected to the middle of the supporting frame, and the detection mechanism is arranged at the top of the supporting frame; the detection mechanism comprises a rectangular barrel, a first moving plate, a telescopic rod, a first spring and a probe, the rectangular barrel is fixedly connected to the center of the top of the supporting frame, an opening of the rectangular barrel faces downwards, the first moving plate is slidably connected into the rectangular barrel, and the first spring is fixedly connected to the bottom of the first moving plate; the first moving plate is located in the first spring and fixedly connected with a telescopic rod, the bottom of the first spring and the bottom of the telescopic rod are jointly and fixedly connected with a mounting frame, and the center of the bottom of the mounting frame is fixedly connected with a probe. The detection mechanism is arranged to carry out adulteration detection on raw milk, and the probe can be cleaned through the design of the cleaning mechanism.

Description

Technical Field

[0001] This invention relates to the field of raw milk detection technology, specifically to a rapid screening device and detection method for adulterated raw milk. Background Technology

[0002] Raw milk adulteration refers to the illegal addition or removal of substances from raw milk to gain economic benefits. Common adulteration methods include diluting raw milk with water, salt solution or whey, or adding cheap protein sources to reduce costs. A search revealed a Chinese patent with publication number CN221039085U, which discloses a raw milk adulteration detection device and system. The raw milk adulteration detection device includes: an experimental table, a vision component mounted on the experimental table with a detection position, a pipetting component mounted on the experimental table, and an operating robot mounted on the experimental table. The operating robot has a container for grasping samples and a grasping structure for experimental utensils. The vision component, operating robot, and pipetting component are respectively set on the experimental table. The operating robot can not only grasp and move the container, but also operate the pipetting component to transfer raw milk and necessary reagents in the experiment. The operating robot works stably and quickly, and the vision component can quickly record and make judgments on the raw milk samples after the test. Compared with manual operation, it significantly improves the reliability and detection efficiency of the experimental process and effectively solves the problem of low detection efficiency of existing raw milk sensory detection methods.

[0003] In the aforementioned technologies, although raw milk is detected through the use of vision components, the devices require the use of operating robots, resulting in high overall equipment costs. Furthermore, the vision components typically require probes for detection. These probes are inserted deep into the raw milk to collect its near-infrared absorption / reflection spectrum, analyzing differences in molecular structure to achieve detection. However, this method can easily lead to raw milk adhering to the probe surface. If not treated promptly, this can easily breed bacteria and affect the quality of subsequent raw milk tests. If the raw milk dries out, it will also affect subsequent probe detection. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid screening device and detection method for adulterated raw milk, so as to solve the problem that existing raw milk detection probes cannot be cleaned immediately after each test.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rapid screening device for adulteration of raw milk, comprising a support frame, and further comprising: The chain conveyor belt is rotatably connected to the middle of the support frame; The detection mechanism is located on the top of the support frame. The detection mechanism includes a rectangular tube, a first movable plate, a telescopic rod, a first spring, and a probe. The rectangular tube is fixedly connected to the center of the top of the support frame and its opening faces downward. The first movable plate is slidably connected inside the rectangular tube. The bottom of the first movable plate is fixedly connected to the first spring. The first movable plate is fixedly connected to the telescopic rod inside the first spring. The bottom of the first spring and the telescopic rod are fixedly connected to a mounting frame. The probe is fixedly connected to the center of the bottom of the mounting frame. The mounting frame is rotatably connected to the two ends of the probe. Multiple placement seats are provided and evenly fixedly connected to the surface of the chain conveyor belt.

[0006] Preferably, a beaker is provided in the middle of the placement seat, and guide plates are fixedly connected to both ends of the beaker. The top of the guide plate is provided with a groove, and the guide plate is rotatably connected to the first roller.

[0007] Preferably, the system further includes a cleaning mechanism, which comprises a liquid storage cylinder, a second movable plate, a spring tube, and an annular tube. The liquid storage cylinder is fixedly connected to the top of the rectangular cylinder. The second movable plate is slidably connected to one end of the inside of the liquid storage cylinder. A first infusion pipe is connected to one end of the top side wall of the liquid storage cylinder. A first one-way valve is installed at one end of the first infusion pipe. One end of the first infusion pipe extends into the inside of the rectangular cylinder and is located above the first movable plate. A spring tube is connected to one end of the first infusion pipe in the rectangular cylinder. The bottom of the spring tube passes through the first movable plate and is connected to a flexible hose. An annular water spray pipe is connected to the bottom of the flexible hose and is fixedly connected to the mounting bracket.

[0008] Preferably, the bottom ends of the second movable plate are respectively fixedly connected to slide rods, the bottom of the slide rods extend into the interior of the rectangular tube and are slidably connected to the rectangular tube, and the rectangular tube is fixedly connected to the slide rods with a second spring, and the second spring is fixedly connected to the slide rods.

[0009] Preferably, a water tank is fixedly connected to one end of the support frame, a second infusion pipe is connected to one end of the water tank, one end of the second infusion pipe is connected to the top of the storage cylinder, and a second one-way valve is installed at one end of the second infusion pipe.

[0010] Preferably, the support frame is fixedly connected to four piston tubes around the rectangular tube, and the top of the side wall of the piston tube is connected to an air supply pipe, which is connected to the top of the side wall of the rectangular tube.

[0011] Preferably, a piston plate is slidably connected inside the piston tube, a third spring is fixedly connected to the top of the piston plate, the third spring is fixedly connected to the piston tube, and a piston rod is fixedly connected to the bottom of the piston plate.

[0012] Preferably, the bottoms of the two piston rods are fixedly connected to an arc-shaped frame, and the top two ends of the placement seat are respectively rotatably connected to second rollers, which are in rolling connection with the arc-shaped frame.

[0013] Preferably, the support frame is slidably connected to a receiving hopper below the rectangular tube, the bottom of the receiving hopper is connected to a drain pipe, and cylinders are fixedly connected to both ends of the support frame at the receiving hopper, with the output end of the cylinders fixedly connected to the receiving hopper.

[0014] A detection method includes the following steps: S1. Place the beaker containing raw milk on top of the placement seat, and drive the chain conveyor belt to rotate via a motor, thereby conveying the placement seat and the raw milk. S2. When the placement seat is about to move to the bottom of the rectangular tube, the second roller will contact the arc frame and squeeze the arc frame, thereby causing the piston rod and piston plate to move upward. At this time, the third spring will contract and drive the receiving hopper to move away from the bottom of the rectangular tube through the two cylinders. S3. During the upward movement of the piston plate, the air pressure in the space above the piston plate will increase. Driven by the air pressure, the first moving plate will move downward, thereby driving the telescopic rod, the first spring, the mounting bracket and the probe to move downward, so that the probe can move into the beaker and detect the raw milk inside. S4. When the placement seat passes the bottom of the arc frame, the third spring will gradually rebound and push the piston plate, piston rod and arc frame to move downward. At this time, the space above the piston plate will generate negative pressure. Under the action of negative pressure, the first moving plate will move upward, so that the probe can move back into the rectangular tube. S5. When the probe moves into the rectangular cylinder, the receiving hopper is driven by two cylinders to move to the bottom of the rectangular cylinder. At the same time, the third spring is still gradually rebounding. During this process, the top of the first moving plate will contact the bottom of the sliding rod and squeeze the sliding rod, thereby pushing the second moving plate upward. At this time, the hydraulic pressure of the liquid storage tank above the second moving plate will increase. Then, the cleaning fluid in the liquid storage tank will flow into the annular spray pipe through the first infusion pipe, spring pipe and hose, and spray out from the nozzle of the annular spray pipe to rinse the probe. The wastewater generated by rinsing will fall into the receiving hopper and be discharged through the drain pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The detection mechanism of this invention is designed to detect adulteration in raw milk. By driving a first moving plate downwards, the telescopic rod, first spring, mounting bracket, and probe move downwards. When the probe and mounting bracket are completely below the rectangular cylinder, the placement seat gradually moves towards the probe under the drive of the chain conveyor belt. During this process, the first rollers at both ends of the mounting bracket contact the guide plate and move upwards under the guidance of the guide plate, thereby moving the mounting bracket and probe upwards so that the probe does not obstruct the movement of the placement seat and beaker. During this process, the first spring contracts. When the groove at the top of the guide plate moves directly below the first roller, the first spring rebounds, pushing the mounting bracket and probe downwards, allowing the probe to penetrate the raw milk inside the beaker, thus achieving the detection of adulteration in raw milk. This invention, through the design of a cleaning mechanism, can clean the probe, thereby preventing it from becoming contaminated. When the probe detection is completed, the first moving plate needs to be driven to move upward, thereby moving the probe into the rectangular cylinder. During the upward movement of the first moving plate, it will contact the bottom of the sliding rod and push the sliding rod upward. At this time, the second spring will gradually compress. During the upward movement of the sliding rod, the second moving plate will be driven to move upward. At this time, the hydraulic pressure inside the liquid storage cylinder above the second moving plate will increase. Then, the cleaning fluid inside the liquid storage cylinder will flow into the annular water spray pipe through the first infusion pipe, spring pipe and hose, and be sprayed out through the nozzle on the annular water spray pipe, thereby rinsing the probe. This invention utilizes the design of an arc-shaped frame and a second roller. As the placement seat moves towards the rectangular cylinder, the second roller contacts and compresses the arc-shaped frame. Under the compression of the second roller, the arc-shaped frame gradually moves upward, thereby driving the piston rod and piston plate upward. During this process, the third spring contracts. As the piston plate moves upward, the air pressure in the space above the piston plate inside the piston tube increases. At this time, the gas in the piston tube flows into the space above the first moving plate inside the rectangular cylinder through the gas delivery pipe, thereby increasing the air pressure in the space above the first moving plate inside the rectangular cylinder. Driven by the air pressure, the first moving plate can move smoothly downward, allowing the probe to move smoothly to the bottom of the rectangular cylinder and thus smoothly insert into the raw milk in the beaker. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the connection structure between the detection mechanism and the support frame of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the diagram; Figure 4 This is a schematic diagram of the side cross-sectional structure of the rectangular cylinder and the liquid storage cylinder in this invention; Figure 5 This is a schematic diagram of the side cross-sectional structure of the piston tube in this invention; Figure 6 This is a schematic diagram of the placement base structure in this invention.

[0017] In the diagram: 1. Support frame; 2. Chain conveyor belt; 3. Detection mechanism; 301. Rectangular cylinder; 302. First moving plate; 303. First spring; 304. Telescopic rod; 305. Mounting frame; 306. Probe; 307. First roller; 4. Placement seat; 5. Cleaning mechanism; 501. Liquid storage tank; 502. Second moving plate; 503. First infusion tube; 504. First check valve; 505. Bourdon tube; 50 6. Hose; 507. Annular water spray pipe; 508. Water tank; 509. Second infusion pipe; 510. Second one-way valve; 511. Slide rod; 512. Second spring; 6. Beaker; 7. Guide plate; 8. Groove; 9. Piston tube; 10. Gas infusion pipe; 11. Piston plate; 12. Third spring; 13. Piston rod; 14. Arc frame; 15. Second roller; 16. Receiving hopper; 17. Drain pipe; 18. Cylinder. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Please see Figures 1-6 This invention provides a technical solution: a rapid screening device for adulterated raw milk, including a support frame 1, a chain conveyor belt 2, a detection mechanism 3, and a placement seat 4. The chain conveyor belt 2 is rotatably connected to the middle of the support frame 1. The detection mechanism 3 is located at the top of the support frame 1 and includes a rectangular cylinder 301, a first moving plate 302, a telescopic rod 304, a first spring 303, and a probe 306. The rectangular cylinder 301 is fixedly connected to the top center of the support frame 1 with its opening facing downwards. The first moving plate 302 is slidably connected inside the rectangular cylinder 301, and the first spring 303 is fixedly connected to the bottom of the first moving plate 302. The first movable plate 302 is fixedly connected to the telescopic rod 304 inside the first spring 303. The bottom of the first spring 303 and the telescopic rod 304 are fixedly connected to the mounting frame 305. The bottom center of the mounting frame 305 is fixedly connected to the probe 306. The mounting frame 305 is rotatably connected to the two ends of the probe 306. Multiple placement seats 4 are provided and are evenly fixedly connected to the surface of the chain conveyor belt 2. A beaker 6 is provided in the middle of the placement seat 4. The two ends of the placement seat 4 are fixedly connected to the guide plate 7. The top of the guide plate 7 is provided with a groove 8. The guide plate 7 is rotatably connected to the first roller 307. Specifically, when adulteration testing of raw milk is required, the beaker 6 containing raw milk is first placed on the placement seat 4. Then, the chain conveyor belt 2 driven by the motor rotates, thereby moving the placement seat 4 and the beaker 6. When the placement seat 4 is about to move below the rectangular cylinder 301, the first moving plate 302 is driven to move downward, thereby moving the telescopic rod 304, the first spring 303, the mounting bracket 305, and the probe 306 downward. When the probe 306 and the mounting bracket 305 have completely moved below the rectangular cylinder 301, the placement seat 4 will gradually move closer to the probe 306 under the drive of the chain conveyor belt 2. During this process, the first rollers at both ends of the mounting bracket 305... Roller 307 will contact guide plate 7 and move upward under the guidance of guide plate 7, thereby driving mounting bracket 305 and probe 306 upward, so that probe 306 will not obstruct the movement of placement seat 4 and beaker 6. During this process, first spring 303 will contract. When the groove 8 at the top of guide plate 7 moves directly below first roller 307, first spring 303 will rebound, thereby pushing mounting bracket 305 and probe 306 downward, so that probe 306 can be inserted into raw milk in beaker 6. The absorption / reflection spectrum of near-infrared light of raw milk is collected by probe 306 to analyze the differences in molecular structure of substances, thereby realizing the detection of adulteration of raw milk.

[0020] like Figure 2 and Figure 4 As shown, it also includes a cleaning mechanism 5, which includes a liquid storage cylinder 501, a second movable plate 502, a spring tube 505, and an annular tube. The liquid storage cylinder 501 is fixedly connected to the top of the rectangular cylinder 301. The second movable plate 502 is slidably connected to one end of the inside of the liquid storage cylinder 501. A first infusion tube 503 is connected to one end of the top side wall of the liquid storage cylinder 501. A first one-way valve 504 is installed at one end of the first infusion tube 503. One end of the first infusion tube 503 extends into the inside of the rectangular cylinder 301 and is located above the first movable plate 302. The spring tube 505 is connected to the spring tube 505 at one end of the rectangular cylinder 301. The bottom of the spring tube 505 passes through the first movable plate 302 and is connected to a flexible tube. 506, the bottom of the hose 506 is connected to an annular water spray pipe 507, and the annular water spray pipe 507 is fixedly connected to the mounting bracket 305; the bottom ends of the second movable plate 502 are respectively fixedly connected to sliding rods 511, the bottom of the sliding rods 511 extends into the interior of the rectangular tube 301 and is slidably connected to the rectangular tube 301, and the rectangular tube 301 is fixedly connected to the sliding rods 511, and the second spring 512 is fixedly connected to the sliding rods 511; one end of the support frame 1 is fixedly connected to a water tank 508, one end of the water tank 508 is connected to a second infusion pipe 509, one end of the second infusion pipe 509 is connected to the top of the storage cylinder 501, and a second one-way valve 510 is installed at one end of the second infusion pipe 509; Specifically, by setting a first one-way valve 504 on the first infusion pipe 503, the water in the storage cylinder 501 can only flow through the storage cylinder 501 to the spring tube 505 and cannot flow back. A second one-way valve 510 on the second infusion pipe 509 allows the water to flow only through the water tank 508 into the storage cylinder 501 and cannot flow back. In the initial state, the probe 306, mounting bracket 305, and first roller 307 are all located inside the rectangular cylinder 301. At this time, the first moving plate 302 is located at the top inside the rectangular cylinder 301, and the second spring 512 is compressed under the pressure of the first moving plate 302. When raw milk needs to be detected, the first moving plate 302 needs to be driven downwards so that the probe 306 can smoothly penetrate into the raw milk in the beaker 6. During the downward movement of the first moving plate 302, the second spring 512 gradually rebounds and pushes the slide rod 511 downwards, thereby driving the second moving plate 502 downwards. At this time, the inside of the storage cylinder 501 is located at the top of the rectangular cylinder 301. A negative pressure is generated in the space above the second moving plate 502. Under the action of the negative pressure, the cleaning fluid in the water tank 508 flows into the storage cylinder 501 through the second infusion pipe 509 for subsequent cleaning of the probe 306. After the probe 306 has been tested, the first moving plate 302 needs to be driven to move upward, thereby moving the probe 306 into the rectangular cylinder 301. During the upward movement of the first moving plate 302, it will contact the bottom of the slide rod 511 and push the slide rod 511 upward. At this time, the second spring 512 will be gradually compressed. During the upward movement of the slide rod 511, the second moving plate 502 will be driven to move upward. At this time, the hydraulic pressure inside the storage cylinder 501 above the second moving plate 502 will increase. At this time, the cleaning fluid inside the storage cylinder 501 will flow into the annular spray pipe 507 through the first infusion pipe 503, spring pipe 505 and hose 506, and be sprayed out through the nozzle on the annular spray pipe 507 to rinse the probe 306.

[0021] like Figure 2 , Figure 3 and Figure 5 As shown, the support frame 1 is fixedly connected to four piston tubes 9 around the rectangular cylinder 301. The top of the side wall of the piston tube 9 is connected to an air supply pipe 10, which is connected to the top of the side wall of the rectangular cylinder 301. A piston plate 11 is slidably connected inside the piston tube 9. A third spring 12 is fixedly connected to the top of the piston plate 11 and is fixedly connected to the piston tube 9. A piston rod 13 is fixedly connected to the bottom of the piston plate 11. An arc-shaped frame 14 is fixedly connected to the bottom of the two piston rods 13. The top two ends of the placement seat 4 are respectively rotatably connected to second rollers 15, which are rolledly connected to the arc-shaped frame 14. Specifically, during the movement of the placement seat 4 towards the rectangular cylinder 301, the second roller 15 contacts the arc-shaped frame 14 and compresses it. Under the compression of the second roller 15, the arc-shaped frame 14 gradually moves upward, thereby driving the piston rod 13 and piston plate 11 to move upward. During this process, the third spring 12 contracts. As the piston plate 11 moves upward, the air pressure in the space above the piston plate 11 inside the piston tube 9 increases. At this time, the gas in the piston tube 9 flows into the space above the first moving plate 302 inside the rectangular cylinder 301 through the air supply pipe 10, thereby increasing the air pressure in the space above the first moving plate 302 inside the rectangular cylinder 301. The first moving plate 302 can be pushed down smoothly so that the probe 306 can be moved smoothly to the bottom of the rectangular tube 301. When the second roller 15 passes through the bottom of the arc frame 14, the third spring 12 will gradually rebound, thereby pushing the piston plate 11, piston rod 13 and arc frame 14 to move down. At this time, a negative pressure will be generated in the space above the piston plate 11 inside the piston tube 9. At this time, the air inside the rectangular tube 301 will flow into the piston tube 9 through the air supply pipe 10, thereby generating a negative pressure in the space above the first moving plate 302 inside the rectangular tube 301. Under the action of the negative pressure, the first moving plate 302 will move up until the probe 306 is completely moved into the rectangular tube 301.

[0022] like Figure 2 As shown, the support frame 1 is slidably connected to the receiving hopper 16 below the rectangular tube 301. The bottom of the receiving hopper 16 is connected to the drain pipe 17. The support frame 1 is fixedly connected to the two ends of the receiving hopper 16, and the output end of the cylinder 18 is fixedly connected to the receiving hopper 16. Specifically, in the initial state, the receiving hopper 16 is located directly below the rectangular cylinder 301 to receive the wastewater generated during the cleaning of the probe 306 and allow the wastewater to be discharged through the drain pipe 17. When it is necessary to test the raw milk, the receiving hopper 16 is moved by the cylinder 18 to move away from below the rectangular cylinder 301 so that the probe 306 can smoothly penetrate into the raw milk in the beaker 6 below.

[0023] A detection method includes the following steps: S1. Place the beaker 6 containing raw milk on top of the placement seat 4, and drive the chain conveyor belt 2 to rotate via a motor, thereby conveying the placement seat 4 and the raw milk. S2. When the placement seat 4 is about to move to the bottom of the rectangular tube 301, the second roller 15 will contact the arc frame 14 and squeeze the arc frame 14, thereby causing the piston rod 13 and piston plate 11 to move upward. At this time, the third spring 12 will contract and drive the receiving hopper 16 to move away from the bottom of the rectangular tube 301 through the two cylinders 18. S3. During the upward movement of the piston plate 11, the air pressure in the space above the piston plate 11 of the piston tube 9 will increase. Under the push of the air pressure, the first moving plate 302 will move downward, thereby driving the telescopic rod 304, the first spring 303, the mounting bracket 305 and the probe 306 to move downward, so that the probe 306 can move into the beaker 6 and detect the raw milk inside it. S4. When the placement seat 4 passes the bottom of the arc frame 14, the third spring 12 will gradually rebound and push the piston plate 11, piston rod 13 and arc frame 14 to move downward. At this time, the space above the piston plate 11 of the piston tube 9 will generate negative pressure. Under the action of negative pressure, the first moving plate 302 will move upward, so that the probe 306 can move back into the rectangular tube 301. S5. When the probe 306 moves into the rectangular cylinder 301, the receiving hopper 16 is driven to move below the rectangular cylinder 301 by the two cylinders 18. At the same time, the third spring 12 is still gradually rebounding. During this process, the top of the first moving plate 302 will contact the bottom of the slide rod 511 and squeeze the slide rod 511, thereby pushing the second moving plate 502 to move upward. At this time, the hydraulic pressure of the liquid storage cylinder 501 above the second moving plate 502 will increase. Then, the cleaning fluid in the liquid storage cylinder 501 will flow into the annular spray pipe 507 through the first infusion pipe 503, spring pipe 505 and hose 506, and spray out from the nozzle of the annular spray pipe 507 to rinse the probe 306. The wastewater generated by rinsing will fall into the receiving hopper 16 and be discharged through the drain pipe 17.

[0024] Working principle: When adulteration detection of raw milk is required, the beaker 6 containing raw milk is first placed on the placement seat 4. Then, the chain conveyor belt 2 driven by the motor rotates, thereby moving the placement seat 4 and the beaker 6. As the placement seat 4 moves downwards towards the rectangular cylinder 301, the second roller 15 contacts the arc frame 14 and squeezes it. Under the squeezing of the second roller 15, the arc frame 14 gradually moves upwards, thereby driving the piston rod 13 and the piston plate 11 upwards. During this process, the third spring 12 contracts. As the piston plate 11 moves upwards, the air pressure in the space above the piston plate 11 inside the piston tube 9 increases. At this time, the gas inside the piston tube 9 flows into the rectangular cylinder 301 through the gas delivery pipe 10 onto the first moving plate 302. Within the rectangular space, the air pressure inside the rectangular cylinder 301 above the first moving plate 302 increases. Driven by the air pressure, the first moving plate 302 can move downward smoothly. During the downward movement of the first moving plate 302, the second spring 512 will gradually rebound. Initially, the second spring 512 is compressed by the pressure of the first moving plate 302. During the rebound of the second spring 512, it will push the slide rod 511 downward, thereby driving the second moving plate 502 downward. At this time, a negative pressure will be generated in the space inside the liquid storage cylinder 501 above the second moving plate 502. Under the action of the negative pressure, the cleaning fluid in the water tank 508 will flow into the liquid storage cylinder 501 through the second infusion pipe 509 for subsequent cleaning of the probe 306. As the first movable plate 302 moves downward, it can drive the telescopic rod 304, the first spring 303, the mounting bracket 305, and the probe 306 downward. When the probe 306 and the mounting bracket 305 have completely moved below the rectangular cylinder 301, the placement seat 4 will gradually move closer to the probe 306 under the drive of the chain conveyor belt 2. During this process, the first rollers 307 at both ends of the mounting bracket 305 will contact the guide plate 7 and move upward under the guidance of the guide plate 7, thereby driving the mounting bracket 305 and the probe 306 upward. This ensures that the probe 306 does not obstruct the movement of the placement seat 4 and the beaker 6. During this process, the first spring 303 will contract. When the groove 8 at the top of the guide plate 7 moves directly below the first roller 307, the first spring 303 will rebound, thereby pushing the mounting bracket 305 and the probe 306 downwards. This allows the probe 306 to be inserted into the raw milk in the beaker 6, thus enabling the detection of adulteration of the raw milk. When the first roller 307 is located inside the groove 8 of the guide plate 7, the second roller 15 is exactly at the bottom of the arc frame 14. When probe 306 completes the detection, the conveyor belt 2 continues to transport the placement seat 4 and beaker 6. At this time, the groove 8 at the top of the guide plate 7 passes through the first roller 307, and the second roller 15 passes through the bottom of the arc frame 14. When the second roller 15 passes through the bottom of the arc frame 14, the third spring 12 gradually rebounds, thereby pushing the piston plate 11, piston rod 13 and arc frame 14 downward. At this time, a negative pressure is generated in the space above the piston plate 11 inside the piston tube 9. The air inside the rectangular cylinder 301 flows into the piston tube 9 through the air supply pipe 10, thereby generating a negative pressure in the space above the first moving plate 302 inside the rectangular cylinder 301. Under the action of the negative pressure, the first moving plate 302 moves upward, thereby moving the probe 306 into the rectangular cylinder 301. At this time, the cylinder 18 drives the probe to move upward. The movable receiving hopper 16 moves to directly below the rectangular cylinder 301. At this time, under the action of negative pressure, the first moving plate 302 will continue to move upward and contact the bottom of the sliding rod 511. Pushed by the first moving plate 302, the sliding rod 511 will also move upward. At this time, the second spring 512 will gradually compress. During the upward movement of the sliding rod 511, it will drive the second moving plate 502 to move upward. At this time, the hydraulic pressure inside the liquid storage cylinder 501 above the second moving plate 502 will increase. At this time, the cleaning fluid inside the liquid storage cylinder 501 will flow into the annular spray pipe 507 through the first infusion pipe 503, spring pipe 505 and hose 506, and be sprayed out through the nozzle on the annular spray pipe 507 to rinse the probe 306. The wastewater generated during rinsing will fall into the receiving hopper 16 and be discharged through the drain pipe 17, thereby cleaning the probe 306.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid screening device for adulterated raw milk, comprising a support frame (1), characterized in that, Also includes: The chain conveyor belt (2) is rotatably connected to the middle of the support frame (1); The detection mechanism (3) is set on the top of the support frame (1). The detection mechanism (3) includes a rectangular tube (301), a first movable plate (302), a telescopic rod (304), a first spring (303), and a probe (306). The rectangular tube (301) is fixedly connected to the top center of the support frame (1) and the opening faces downward. The first movable plate (302) is slidably connected inside the rectangular tube (301). The first spring (303) is fixedly connected to the bottom of the first movable plate (302). The telescopic rod (304) is fixedly connected inside the first spring (303). The bottom of the first spring (303) and the telescopic rod (304) are fixedly connected to a mounting frame (305). The probe (306) is fixedly connected to the bottom center of the mounting frame (305). The first roller (307) is rotatably connected to both ends of the mounting frame (305) and the probe (306). Placement seats (4) are provided in multiples and are evenly fixedly connected to the surface of the chain conveyor belt (2).

2. The rapid screening device for adulteration of raw milk according to claim 1, characterized in that: A beaker (6) is provided in the middle of the placement seat (4). Guide plates (7) are fixedly connected to both ends of the beaker (6) of the placement seat (4). A groove (8) is provided on the top of the guide plate (7). The guide plate (7) is rotatably connected to the first roller (307).

3. The rapid screening device for adulteration of raw milk according to claim 2, characterized in that: It also includes a cleaning mechanism (5), which includes a liquid storage cylinder (501), a second movable plate (502), a spring tube (505), and an annular tube. The liquid storage cylinder (501) is fixedly connected to the top of the rectangular cylinder (301). The second movable plate (502) is slidably connected to one end of the inside of the liquid storage cylinder (501). A first infusion tube (503) is connected to one end of the top side wall of the liquid storage cylinder (501). A first one-way valve (504) is installed at one end of the first infusion tube (503). One end of the first infusion tube (503) extends into the interior of the rectangular tube (301) and is located above the first moving plate (302). The first infusion tube (503) is connected to a spring tube (505) at one end of the rectangular tube (301). The bottom of the spring tube (505) passes through the first moving plate (302) and is connected to a hose (506). The bottom of the hose (506) is connected to an annular spray pipe (507). The annular spray pipe (507) is fixedly connected to the mounting bracket (305).

4. The rapid screening device for adulteration of raw milk according to claim 3, characterized in that: The bottom ends of the second movable plate (502) are respectively fixedly connected to slide rods (511). The bottom of the slide rods (511) extends into the interior of the rectangular tube (301) and is slidably connected to the rectangular tube (301). The rectangular tube (301) is fixedly connected to the slide rods (511) with a second spring (512). The second spring (512) is fixedly connected to the slide rods (511).

5. The rapid screening device for adulteration of raw milk according to claim 4, characterized in that: One end of the support frame (1) is fixedly connected to a water tank (508), and one end of the water tank (508) is connected to a second infusion pipe (509). One end of the second infusion pipe (509) is connected to the top of the storage cylinder (501), and one end of the second infusion pipe (509) is equipped with a second one-way valve (510).

6. The rapid screening device for adulteration of raw milk according to claim 5, characterized in that: The support frame (1) is fixedly connected to four piston tubes (9) around the rectangular tube (301). The top of the side wall of the piston tube (9) is connected to a gas supply pipe (10), and the gas supply pipe (10) is connected to the top of the side wall of the rectangular tube (301).

7. The rapid screening device for adulteration of raw milk according to claim 6, characterized in that: A piston plate (11) is slidably connected inside the piston tube (9). A third spring (12) is fixedly connected to the top of the piston plate (11). The third spring (12) is fixedly connected to the piston tube (9). A piston rod (13) is fixedly connected to the bottom of the piston plate (11).

8. The rapid screening device for adulteration of raw milk according to claim 7, characterized in that: The bottom of the two piston rods (13) is fixedly connected to an arc frame (14), and the top two ends of the placement seat (4) are respectively rotatably connected to second rollers (15), and the second rollers (15) are rotatably connected to the arc frame (14).

9. The rapid screening device for adulteration of raw milk according to claim 8, characterized in that: The support frame (1) is slidably connected to the receiving hopper (16) below the rectangular tube (301). The bottom of the receiving hopper (16) is connected to the drain pipe (17). The support frame (1) is fixedly connected to the two ends of the receiving hopper (16) respectively. The output end of the cylinder (18) is fixedly connected to the receiving hopper (16).

10. A detection method based on the rapid screening device for adulteration of raw milk according to claim 9, characterized in that, Includes the following steps: S1. Place the beaker (6) containing raw milk on top of the placement seat (4) and drive the chain conveyor belt (2) to rotate by the motor, thereby conveying the placement seat (4) and the raw milk. S2. When the placement seat (4) is about to move to the bottom of the rectangular tube (301), the second roller (15) will contact the arc frame (14) and squeeze the arc frame (14), thereby causing the piston rod (13) and piston plate (11) to move upward. At this time, the third spring (12) will contract and drive the receiving hopper (16) to move away from the bottom of the rectangular tube (301) through the two cylinders (18). S3. During the upward movement of the piston plate (11), the air pressure in the space above the piston plate (11) of the piston tube (9) will increase. Under the push of the air pressure, the first moving plate (302) will move downward, thereby driving the telescopic rod (304), the first spring (303), the mounting bracket (305) and the probe (306) to move downward, so that the probe (306) can move into the beaker (6) and detect the raw milk inside it. S4. When the placement seat (4) passes the bottom of the arc frame (14), the third spring (12) will gradually rebound and push the piston plate (11), piston rod (13) and arc frame (14) downward. At this time, the space above the piston plate (11) where the piston tube (9) is located will generate negative pressure. Under the action of negative pressure, the first moving plate (302) will move upward, so that the probe (306) can move back into the rectangular tube (301). S5. When the probe (306) moves into the rectangular cylinder (301), the receiving hopper (16) is driven to move below the rectangular cylinder (301) by two cylinders (18). At the same time, the third spring (12) is still gradually rebounding. During this process, the top of the first moving plate (302) will contact the bottom of the slide rod (511) and squeeze the slide rod (511), thereby pushing the second moving plate (502) to move upward. At this time, the hydraulic pressure of the liquid storage cylinder (501) above the second moving plate (502) will increase. At this time, the cleaning liquid in the liquid storage cylinder (501) will flow into the annular spray pipe (507) through the first infusion pipe (503), spring pipe (505) and hose (506), and spray out from the nozzle of the annular spray pipe (507) to rinse the probe (306). The wastewater generated by rinsing will fall into the receiving hopper (16) and be discharged through the drain pipe (17).

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