Device for rapidly detecting freshness of animal-derived food

Abstract

The invention discloses a rapid freshness detection device for animal-derived food, and relates to the technical field of food detection, the rapid freshness detection device comprises a detection box, a sealing plate, an air inlet pipe, a servo motor, a main gear, a first driving assembly, a second driving assembly and a gas detector; a feeding hole is formed in the side wall of the detection box, the sealing plate is detachably installed at the feeding hole in a sealed mode, the air inlet pipe is arranged on the side wall of the lower end of the detection box in a communicating mode, the servo motor is fixedly installed on the upper end face of the detection box, and the main gear is fixed to the output end of the servo motor. The first driving assembly and the second driving assembly are both arranged on the detection box and are both driven by the servo motor, and the gas detector is fixedly installed on the inner wall of the upper end of the detection box.

Description

Technical Field

[0001] The present invention relates to the technical field of food detection, and in particular to a device for quickly detecting the freshness of animal-derived food. Background Art

[0002] Animal-derived foods—meat products—are common on people's tables, and maintaining their freshness has always been a focus of attention for consumers and producers. Currently, the freshness of meat samples is primarily tested in the laboratory by preparing meat samples and using laboratory instruments and chemical reagents to determine the values ​​of relevant indicators in pork, such as pH, moisture, and volatile amine compounds. While electronic noses can detect volatile amine compounds in meat, the data obtained is relatively accurate. However, existing detection methods rely solely on gas detection based on the spontaneous volatilization of meat samples, resulting in low detection efficiency. Furthermore, they can only test the sample surface, leaving the internal freshness of the sample undetectable, and thus cannot fully assess the freshness of the meat.

[0003] Therefore, it is necessary to invent a rapid freshness detection device for animal-derived food to solve the above problems. Summary of the Invention

[0004] In view of the above problems, the present invention provides a device for rapid detection of the freshness of animal-derived food, which solves the problems of low efficiency of autonomous volatilization detection and inability to perform comprehensive detection of meat.

[0005] The technical solution adopted by the present invention is: it includes a detection box, a sealing plate, an air intake pipe, a servo motor, a main gear, a first drive assembly, a second drive assembly and a gas detector; a feed hole is opened on the side wall of the detection box, the sealing plate is detachably and sealingly installed at the feed hole, the air intake pipe is connected and arranged on the lower end side wall of the detection box, the servo motor is fixedly installed on the upper end face of the detection box, the main gear is fixed to the output end of the servo motor, the first drive assembly and the second drive assembly are both arranged on the detection box and are both driven by the servo motor, and the gas detector is fixedly installed on the upper end inner wall of the detection box.

[0006] Further, as a preference, the first driving assembly includes an internally threaded cylinder, an externally threaded cylinder, a rectangular rod, a slave gear 1 and a support cylinder; the internally threaded cylinder is fixed through the center of the upper end wall of the detection box, the externally threaded cylinder is threadedly connected to the internally threaded cylinder, the rectangular rod is fixed to the upper end of the externally threaded cylinder, the slave gear 1 is slidably set on the rectangular rod, the upper end of the support cylinder is fixed to the slave gear 1, an annular groove is opened at the upper end of the detection box, the lower end of the support cylinder is rotatably set in the annular groove, and the slave gear 1 is engaged with the main gear.

[0007] Furthermore, as a preference, the first driving assembly also includes a micro drill, a push-type self-locking part, a rack, a screw barrel, a rectangular shaft, a rotating gear and an expansion piece; the micro drill is arranged below the external threaded barrel, and two built-in grooves are symmetrically opened inwardly at the lower end of the external threaded barrel, and the push-type self-locking parts are symmetrically arranged, respectively arranged between the micro drill and the inner wall of the built-in groove, the rack is fixed to the upper end of the micro drill, and two threaded holes are symmetrically opened on the side wall of the external threaded barrel, and the screw barrel is symmetrically arranged, respectively threaded in the two threaded holes, and a rectangular groove is opened in one end of the two screw barrels close to each other, and the two ends of the rectangular shaft are slidably arranged in the two rectangular grooves, the rotating gear is fixed on the rectangular shaft, and the rotating gear is meshed with the rack, and an annular groove is opened on the rectangular shaft, a bearing is set in the annular groove, and a connecting rod is fixed on the side wall of the bearing, the connecting rod is fixed to the inner wall of the external threaded barrel, and the expansion piece is symmetrically arranged, respectively set and rotating on the ends of the two screw barrels away from each other.

[0008] Furthermore, preferably, a through hole is provided on the expansion piece.

[0009] Further, as preferably, the second driving assembly includes a rotating shaft, a slave gear 2, a pinion, a positioning column, a linkage gear, a spherical sleeve, a rotating disk, an L-shaped rod and a rubber ring; the rotating shaft is rotatably arranged in the side wall of the detection box, the slave gear 2 is fixed to the upper end of the rotating shaft, and the slave gear 2 is meshed with the main gear, the pinion is fixed to the lower end of the rotating shaft, the positioning column set is rotatably arranged at the center of the lower inner wall of the detection box, the linkage gear is fixed on the positioning column, and the linkage gear is meshed with the pinion, the spherical sleeve is fixed at the upper end of the positioning column, the rotating disk is arranged in the detection box, a plurality of air holes are opened on the rotating disk, a spherical groove is opened at the center of the lower end of the rotating disk, the spherical sleeve is rotatably arranged in the spherical groove, one end of the L-shaped rod is fixed on the side wall of the positioning column, and the other end is in movably contact with the lower end wall of the rotating disk, and the rubber ring is sealed and bonded to the periphery of the rotating disk.

[0010] Furthermore, as a preference, the second drive assembly also includes an outer gear ring, a sleeve shaft, a reversing gear 1 and a reversing gear 2; an annular groove is provided on the inner wall of the lower end of the detection box, the outer gear ring is rotatably set in the annular groove, and the inner wall of the outer gear ring is in sealing contact with the rubber ring, the sleeve shaft is rotatably set on the inner walls of the upper and lower ends of the annular groove, the reversing gear 1 is fixed on the rotating shaft, the reversing gear 2 is fixed on the sleeve shaft, the reversing gear 1 is engaged with the reversing gear 2, and the reversing gear 2 is engaged with the outer gear ring.

[0011] Furthermore, preferably, an exhaust port is provided at the upper end of the detection box.

[0012] Advantages of the present invention: By using the first drive assembly, a vertical channel can be formed in the center of the meat sample, and the channel can be expanded to facilitate airflow through the channel, thereby enabling detection of the interior of the sample. Therefore, the present invention can not only detect the surface of the meat, but also the interior of the meat, thereby increasing the detection range and more comprehensively detecting the freshness of the meat. At the same time, the sample can be lifted and placed in a suspended state, thereby increasing the effective detection surface and further improving the detection range. By combining the second drive assembly with the first drive assembly, the rotating disk can perform a circular tilting motion around the center, which can continuously change the orientation of the air vents. Therefore, the suspended sample can be weathered from multiple angles, so that every part of the sample can be evenly weathered, thereby increasing the volatilization rate of amine compounds and thus improving detection efficiency. At the same time, the rotating disk can rotate in a circular motion and generate centrifugal force, which can throw the meat crumbs that fall on the surface of the rotating disk to the edge of the rotating disk to prevent the air vents from being blocked.

[0013] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic structural diagram of the first drive assembly of the present invention; Figure 3 It is a schematic diagram of the structure of the first drive assembly of the present invention; Figure 4 It is a schematic diagram of the internal structure of the externally threaded barrel of the present invention; Figure 5 is a schematic structural diagram of the second drive assembly of the present invention; Figure 6 It is an enlarged view of A of the present invention.

[0016] Figure 1: Detection box; 2: Closing plate; 3: Inlet pipe; 4: Servo motor; 5: Main gear; 6: First drive assembly; 7: Second drive assembly; 8: Gas detector; 61: Internally threaded barrel; 62: Externally threaded barrel; 63: Rectangular rod; 64: Slave gear 1; 65: Support barrel; 66: Micro drill; 67: Press-type self-locking member; 68: Rack; 69: Screw barrel; 601: Rectangular shaft; 6011 , bearing; 602, rotating gear; 603, expansion piece; 6031, through hole; 71, rotating shaft; 72, slave gear 2; 73, pinion; 74, positioning column; 75, linkage gear; 76, spherical sleeve; 77, rotating disk; 78, L-shaped rod; 79, rubber ring; 701, outer gear ring; 702, sleeve shaft; 703, reversing gear 1; 704, reversing gear 2; 11, annular groove; 12, exhaust port. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, 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 only used to explain the present invention and are not intended to limit the present invention.

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0019] refer to Figures 1 to 6 , a rapid detection device for the freshness of animal-derived food, comprising a detection box 1, a sealing plate 2, an air inlet pipe 3, a servo motor 4, a main gear 5, a first drive assembly 6, a second drive assembly 7 and a gas detector 8; a feed hole is provided on the side wall of the detection box 1, the sealing plate 2 is detachably and sealingly installed at the feed hole, the air inlet pipe 3 is connected and arranged on the lower end side wall of the detection box 1, the servo motor 4 is fixedly installed on the upper end surface of the detection box 1, the main gear 5 is fixed to the output end of the servo motor 4, the first drive assembly 6 and the second drive assembly 7 are both arranged on the detection box 1, and are both driven by the servo motor 4, and the gas detector 8 is fixedly installed on the upper end inner wall of the detection box 1.

[0020] The air intake pipe 3 is connected to the external air intake tank.

[0021] As a preferred embodiment, the first driving assembly 6 includes an internal threaded barrel 61, an external threaded barrel 62, a rectangular rod 63, a slave gear 64 and a support barrel 65; the internal threaded barrel 61 is fixedly passed through the center of the upper end wall of the detection box 1, the external threaded barrel 62 is threadedly connected to the internal threaded barrel 61, the rectangular rod 63 is fixed to the upper end of the external threaded barrel 62, the slave gear 64 is slidably set on the rectangular rod 63, the upper end of the support barrel 65 is fixed to the slave gear 64, an annular groove is opened at the upper end of the detection box 1, the lower end of the support barrel 65 is rotatably set in the annular groove, and the slave gear 64 is engaged with the main gear 5.

[0022] That is to say, when the servo motor 4 drives the main gear 5 to rotate, it will drive the slave gear 1 64 to rotate through the meshing action, and the slave gear 1 64 will drive the rectangular rod 63 to rotate synchronously, so that the rectangular rod 63 will drive the external threaded barrel 62 to rotate, and then the external threaded barrel 62 and the internal threaded barrel 61 will perform threaded transmission, so that the external threaded barrel 62 will move up and down in a spiral manner.

[0023] As a preferred embodiment, the first driving component 6 also includes a micro drill 66, a push-type self-locking part 67, a rack 68, a screw barrel 69, a rectangular shaft 601, a rotating gear 602 and an expansion piece 603; the micro drill 66 is arranged below the external threaded barrel 62, and two built-in grooves are symmetrically opened inward at the lower end of the external threaded barrel 62, and the push-type self-locking parts 67 are symmetrically arranged. Two are respectively arranged between the micro drill 66 and the inner wall of the built-in groove, the rack 68 is fixed to the upper end of the micro drill 66, and two threaded holes are symmetrically opened on the side wall of the external threaded barrel 62, and the screw barrel 69 is symmetrically arranged. There are two of them, which are respectively threaded in two threaded holes. A rectangular groove is provided in the two screw barrels 69 at one end close to each other. The two ends of the rectangular shaft 601 are slidably set in the two rectangular grooves. The rotating gear 602 is fixed on the rectangular shaft 601, and the rotating gear 602 is engaged with the rack 68. An annular groove is provided on the rectangular shaft 601, and a bearing 6011 is installed in the annular groove, and a connecting rod is fixed on the side wall of the bearing 6011. The connecting rod is fixed to the inner wall of the external threaded barrel 62. There are two expansion pieces 603 symmetrically arranged, which are respectively installed and rotated on the ends of the two screw barrels 69 away from each other.

[0024] The bearing 6011 is used to limit the rectangular shaft 601 to prevent the rectangular shaft 601 from sliding arbitrarily in the two threaded holes, thereby preventing the rotating gear 602 from being separated from the rack 68.

[0025] Please refer to the following for details: Figures 2 to 4 When the external threaded barrel 62 moves downward in a spiral motion, it drives the micro drill 66 to move, thereby being able to drill into the interior of the food to be tested until it penetrates the meat sample to be tested, thereby forming a vertical channel in the center of the meat sample to be tested; In addition, when the micro drill 66 approaches the external threaded barrel 62, the rack 68 will move upward, so that the rack 68 will engage with the rotating gear 602, and the rotating gear 602 will drive the rectangular shaft 601 to rotate, and the rectangular shaft 601 will drive the two screw barrels 69 to rotate. When the two screw barrels 69 rotate, they will be threadedly transmitted with the two threaded holes, so that the two screw barrels 69 will spiral outward, and the two screw barrels 69 will push the two expansion plates 603 to expand outward, so that the channel gap between the two expansion plates 603 and the external threaded barrel 62 increases. At the same time, the two expansion plates 603 can be tightly attached to the inner wall of the meat in the expanded state, so that the friction between the expansion plates 603 and the inner wall of the meat increases, so that the meat can be lifted up by friction later.

[0026] Among them, the press-type self-locking part 67 is an existing reset switch structure, and the specific structural composition and principle will not be described in detail here. In the present invention, when the micro drill bit 66 moves back and forth relative to the external threaded tube 62 for the first time, the micro drill bit 66 will stay at a certain position close to the external threaded tube 62. At this time, the two expansion pieces 603 remain in an outward-expanded state, that is, the two expansion pieces 603 remain in close contact with the inner wall of the meat. When the micro drill bit 66 moves back and forth relative to the external threaded tube 62 for the second time, the micro drill bit 66 will return to its initial position. At this time, the two expansion pieces 603 are transformed from an outward-expanded state to a contracted state, that is, the friction between the two expansion pieces 603 and the inner wall of the meat is reduced, so that the meat sample can easily separate from the expansion piece 603.

[0027] As a preferred embodiment, a through hole 6031 is formed on the expansion piece 603 .

[0028] That is to say, when the air flow flows upward through the channel gap between the expansion piece 603 and the external threaded barrel 62, it will carry the volatile gas inside the meat and be detected by the gas detector 8. Therefore, the present invention can not only detect the surface of the meat, but also detect the inside of the meat, thereby increasing the detection range and being able to more comprehensively detect the freshness of the meat.

[0029] As a preferred embodiment, the second driving assembly 7 includes a rotating shaft 71, a second slave gear 72, a pinion 73, a positioning column 74, a linkage gear 75, a spherical sleeve 76, a rotating disk 77, an L-shaped rod 78 and a rubber ring 79; the rotating shaft 71 is rotatably arranged in the side wall of the detection box 1, the second slave gear 72 is fixed to the upper end of the rotating shaft 71, and the second slave gear 72 is meshed with the main gear 5, the pinion 73 is fixed to the lower end of the rotating shaft 71, the positioning column 74 is rotatably arranged in the center of the lower inner wall of the detection box 1, and the linkage The gear 75 is fixed on the positioning column 74, and the linkage gear 75 is engaged with the pinion 73. The spherical sleeve 76 is fixed to the upper end of the positioning column 74. The rotating disk 77 is arranged in the detection box 1. A plurality of air holes are opened on the rotating disk 77. A spherical groove is opened at the center of the lower end of the rotating disk 77. The spherical sleeve 76 is rotatably set in the spherical groove. One end of the L-shaped rod 78 is fixed to the side wall of the positioning column 74, and the other end is in active contact with the lower end wall of the rotating disk 77. The rubber ring 79 is sealed and bonded to the outer periphery of the rotating disk 77.

[0030] It should be explained that the air inlet pipe 3 is connected to the space below the rotating disk 77. Therefore, the gas will enter the space above the rotating disk 77 through multiple air holes and provide wind force to the meat to be tested, so that the ammonium compounds in the meat can evaporate quickly, thereby improving the detection efficiency.

[0031] In addition, the surface of the rotating disk 77 is configured to be funnel-shaped so that the meat sample to be tested can be placed in the center of the rotating disk 77 for drilling the sample.

[0032] Please refer to the following for details: Figure 5 When the servo motor 4 drives the main gear 5 to rotate, it will drive the slave gear 2 72 to rotate through the meshing action. The slave gear 2 72 will drive the rotating shaft 71 to rotate. The rotating shaft 71 will drive the pinion 73 to rotate. The pinion 73 engages with the linkage gear 75 to drive the positioning column 74 to rotate, so that the L-shaped rod 78 will produce a circular motion, and then the rotating disk 77 will perform a circular tilting motion around the center. Therefore, the orientation of the multiple air holes will continue to change, so that the meat sample to be tested can be weathered from multiple angles, so that each part of the sample can be evenly weathered, thereby increasing the volatilization rate of amine compounds and thus improving the detection efficiency.

[0033] As a preferred embodiment, the second drive assembly 7 also includes an outer gear ring 701, a sleeve shaft 702, a reversing gear 1 703 and a reversing gear 2 704; an annular groove 11 is provided on the inner wall of the lower end of the detection box 1, the outer gear ring 701 is rotatably set in the annular groove 11, and the inner wall of the outer gear ring 701 is in sealing contact with the rubber ring 79, the sleeve shaft 702 is rotatably set on the inner walls of the upper and lower ends of the annular groove 11, the reversing gear 1 703 is fixed on the rotating shaft 71, the reversing gear 2 704 is fixed on the sleeve shaft 702, the reversing gear 1 703 is meshed with the reversing gear 2 704, and the reversing gear 2 704 is meshed with the outer gear ring 701.

[0034] See also Figures 5 and 6 When the rotating shaft 71 rotates, it drives the reversing gear 1 703 to rotate. Through the meshing of the reversing gear 1 703, the reversing gear 2 704 and the outer gear ring 701, the outer gear ring 701 will rotate. The outer gear ring 701 drives the rubber ring 79 to rotate synchronously through the friction between the outer gear ring 701 and the rubber ring 79, thereby driving the rotating disk 77 to rotate. Therefore, the minced meat falling on the rotating disk 77 can be thrown to the edge of the rotating disk 77 by centrifugal force, preventing the fallen meat from clogging the air vents.

[0035] It should be noted that if the rotating shaft 71 rotates clockwise, the L-shaped rod 78 will rotate counterclockwise, while the outer gear ring 701 and the rubber ring 79 will rotate clockwise, that is, the rotating disk 77 will rotate clockwise. Therefore, the rotation direction of the rotating disk 77 is opposite to the rotation direction of the L-shaped rod 78, preventing the L-shaped rod 78 and the rotating disk 77 from being relatively stationary.

[0036] As a preferred embodiment, an exhaust port 12 is provided at the upper end of the detection box 1 to maintain the detection box 1 in a constant pressure state.

[0037] Specifically, during implementation, first open the sealing plate 2, place the meat sample to be tested on the center of the rotating disk 77, then close the sealing plate 2, control the servo motor 4 through the external control end and drive the main gear 5 to rotate counterclockwise, the external threaded barrel 62 will move downward clockwise, so that the micro drill 66 will drill the meat sample to be tested, and when the micro drill 66 completely penetrates the meat sample, the lower end of the micro drill 66 is limited by the rotating disk 77, triggering the press-type self-locking part 67, and the two expansion pieces 603 will expand synchronously and adhere to the inner wall of the meat, and then control the servo motor 4 to change the driving direction, and the external threaded barrel 62 will spirally rotate upward. At this time, the press-type self-locking part 67 will not reset, and the two expansion pieces 603 will always be in an expanded state. Therefore, the two expansion pieces 603 will lift the sample through the friction between the inner wall of the sample, and then the sample will separate from the rotating disk 77 and spirally move upward synchronously with the expansion piece 603. During this process, the rotating disk 77 will be tilted in a circle around the center. Movement, so that the directions of multiple air holes will change continuously, so that the meat sample to be tested can be fully weathered, the volatilization rate of amine compounds can be increased, and then the detection efficiency can be improved. At the same time, the outer gear ring 701 will drive the rotating disk 77 to rotate in a circle, so as to prevent the meat crumbs that fall during the detection process from clogging the air holes. During the detection, the air flow will not only pass through the entire surface layer of the sample, but also flow through the channel gap between the expansion piece 603 and the external threaded barrel 62, so that the inside of the sample can be detected, and the detection range can be increased. After the detection is completed, the servo motor 4 is controlled to drive counterclockwise again, and the press-type self-locking part 67 is triggered for the second time. The two expansion pieces 603 will shrink synchronously, and the pressure on the inner wall of the sample will decrease, so that the meat sample will be separated from the expansion piece 603. Then the servo motor 4 is controlled to drive clockwise, and the external threaded barrel 62 will return to its initial position. The expansion piece 603 is completely separated from the sample, and finally the sealing plate 2 is opened to take out the sample, and the detection work is completed.

[0038] 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, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for rapid detection of freshness of animal-derived food, characterized in that: The invention comprises a detection box (1), a sealing plate (2), an air inlet pipe (3), a servo motor (4), a main gear (5), a first drive assembly (6), a second drive assembly (7) and a gas detector (8); a feed hole is provided on the side wall of the detection box (1); the sealing plate (2) is detachably and sealingly mounted at the feed hole; the air inlet pipe (3) is connected and arranged on the side wall of the lower end of the detection box (1); the servo motor (4) is fixedly mounted on the upper end surface of the detection box (1); the main gear (5) is fixed to the output end of the servo motor (4); the first drive assembly (6) and the second drive assembly (7) are both arranged on the detection box (1) and are driven by the servo motor (4); and the gas detector (8) is fixedly mounted on the inner wall of the upper end of the detection box (1).

2. The device for rapid detection of freshness of animal-derived food according to claim 1, characterized in that: The first driving assembly (6) includes an internal threaded barrel (61), an external threaded barrel (62), a rectangular rod (63), a slave gear 1 (64) and a support barrel (65); the internal threaded barrel (61) is fixedly passed through the center of the upper end wall of the detection box (1), the external threaded barrel (62) is threadedly connected to the internal threaded barrel (61), the rectangular rod (63) is fixed to the upper end of the external threaded barrel (62), the slave gear 1 (64) is slidably mounted on the rectangular rod (63), the upper end of the support barrel (65) is fixed to the slave gear 1 (64), an annular groove is provided at the upper end of the detection box (1), the lower end of the support barrel (65) is rotatably mounted in the annular groove, and the slave gear 1 (64) is meshed with the main gear (5).

3. The device for rapid detection of freshness of animal-derived food according to claim 2, characterized in that: The first driving assembly (6) further comprises a micro drill (66), a push-type self-locking member (67), a rack (68), a screw barrel (69), a rectangular shaft (601), a rotating gear (602) and an expansion piece (603); the micro drill (66) is arranged below the external thread barrel (62), and two built-in grooves are symmetrically provided inwardly at the lower end of the external thread barrel (62), the push-type self-locking member (67) is symmetrically arranged in two, and is respectively provided between the micro drill (66) and the inner wall of the built-in groove, the rack (68) is fixed to the upper end of the micro drill (66), and two threaded holes are symmetrically provided on the side wall of the external thread barrel (62), and the screw barrel (69) is symmetrically provided with a plurality of screw holes. There are two of them, which are respectively threadedly connected in the two threaded holes. A rectangular groove is opened in one end of the two screw barrels (69) close to each other. The two ends of the rectangular shaft (601) are slidably set in the two rectangular grooves. The rotating gear (602) is fixed on the rectangular shaft (601), and the rotating gear (602) is engaged with the rack (68). An annular groove is opened on the rectangular shaft (601), and a bearing (6011) is set in the annular groove. A connecting rod is fixed on the side wall of the bearing (6011), and the connecting rod is fixed to the inner wall of the external threaded barrel (62). The expansion piece (603) is symmetrically arranged with two of them, which are respectively set and rotated on the ends of the two screw barrels (69) away from each other.

4. The device for rapid detection of freshness of animal-derived food according to claim 3, characterized in that: The expansion piece (603) is provided with a through hole (6031).

5. The device for rapid detection of freshness of animal-derived food according to claim 1, characterized in that: The second driving assembly (7) includes a rotating shaft (71), a second slave gear (72), a small gear (73), a positioning column (74), a linkage gear (75), a spherical sleeve (76), a rotating disk (77), an L-shaped rod (78) and a rubber ring (79); the rotating shaft (71) is rotatably arranged in the side wall of the detection box (1), the second slave gear (72) is fixed to the upper end of the rotating shaft (71), and the second slave gear (72) is meshed with the main gear (5), the small gear (73) is fixed to the lower end of the rotating shaft (71), the positioning column (74) is rotatably arranged in the center of the lower inner wall of the detection box (1), and the linkage The gear (75) is fixed on the positioning column (74), and the linkage gear (75) is meshed with the pinion (73). The spherical sleeve (76) is fixed on the upper end of the positioning column (74). The rotating disk (77) is set in the detection box (1). A plurality of air holes are opened on the rotating disk (77). A spherical groove is opened at the center of the lower end of the rotating disk (77). The spherical sleeve (76) is rotatably set in the spherical groove. One end of the L-shaped rod (78) is fixed on the side wall of the positioning column (74), and the other end is in active contact with the lower end wall of the rotating disk (77). The rubber ring (79) is sealed and bonded to the outer periphery of the rotating disk (77).

6. The device for rapid detection of freshness of animal-derived food according to claim 5, characterized in that: The second driving assembly (7) further comprises an outer gear ring (701), a sleeve shaft (702), a reversing gear 1 (703) and a reversing gear 2 (704); an annular groove (11) is provided on the inner wall of the lower end of the detection box (1); the outer gear ring (701) is rotatably arranged in the annular groove (11), and the inner wall of the outer gear ring (701) is in sealing contact with the rubber ring (79); the sleeve shaft (702) is rotatably arranged on the inner walls of the upper and lower ends of the annular groove (11); the reversing gear 1 (703) is fixed on the rotating shaft (71); the reversing gear 2 (704) is fixed on the sleeve shaft (702); the reversing gear 1 (703) is meshed with the reversing gear 2 (704); and the reversing gear 2 (704) is meshed with the outer gear ring (701).

7. The device for rapid detection of freshness of animal-derived food according to claim 1, characterized in that: An exhaust port (12) is provided at the upper end of the detection box (1).

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