Food preservation and sterilization device suitable for electron beam gradient irradiation

Abstract

The invention belongs to the technical field of food preservation and sterilization, and discloses a food preservation and sterilization device suitable for electron beam gradient irradiation, the food preservation and sterilization device comprises a sterilization room, a working shell is fixedly connected to the bottom of the inner wall of the sterilization room, and a conveying part is arranged in the working shell and used for conveying food boxes; a fixing plate is fixedly connected to the top of the inner wall of the sterilization room, the fresh-keeping and sterilizing device further comprises a fresh-keeping and sterilizing mechanism, a strip-shaped plate drives lifting plates in a lifting assembly to move, and the two lifting plates get close to each other, so that a food box is clamped. The clamping plates are gradually close to the clamping shells under the counter-acting force of the food box, in the process, a rotating strip drives a sliding block to vertically ascend along the inner wall of a strip-shaped hole, the sliding block drives a lifting plate to ascend, and therefore the food box stably ascends, the distance between the food box and a first electron beam device is shortened, and the working efficiency is improved. And the penetration effect of the electron beam is maximized, so that the sterilization effect is improved.

Description

Technical Field

[0001] This invention belongs to the field of food preservation and sterilization technology, specifically a food preservation and sterilization device suitable for electron beam gradient irradiation. Background Technology

[0002] A food preservation and sterilization device suitable for electron beam gradient irradiation utilizes electron beam technology for food sterilization and preservation. This device employs an electron accelerator to generate a high-energy electron beam, which kills microorganisms, bacteria, viruses, and other harmful substances in food through radiation, thereby extending the shelf life and maintaining the freshness and safety of the food. The basic principle of electron beam gradient irradiation is to gradually reduce the radiation dose by controlling the energy and intensity of the electron beam to achieve the best sterilization effect while ensuring that the nutritional components and flavor of the food are not damaged.

[0003] Current technology typically involves placing a food container under an electron beam device to irradiate the top of the container with gradient radiation to sterilize the food. However, in this process, the electron beam can only sterilize the top of the container, resulting in uneven distribution of radiation dose. This makes it difficult to effectively kill microorganisms, while some areas may be over-irradiated, affecting the quality of the food. Summary of the Invention

[0004] To address the problem of uneven radiation mentioned in the background art, where the radiation distribution is difficult to achieve uniformity, especially for thicker foods due to the limited penetrating power of electron beams, even gradient irradiation cannot completely avoid this problem. This invention provides a food preservation and sterilization device suitable for electron beam gradient irradiation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a food preservation and sterilization device suitable for electron beam gradient irradiation, comprising a sterilization chamber, a working shell fixedly connected to the bottom of the inner wall of the sterilization chamber, a conveying component disposed inside the working shell for conveying food boxes, a fixed plate fixedly connected to the top of the inner wall of the sterilization chamber, and a preservation and sterilization mechanism, the preservation and sterilization mechanism comprising an electric telescopic rod fixedly connected to one side of the fixed plate, a strip plate fixedly connected to the movable end of the electric telescopic rod, a first electron beam device fixedly connected to the bottom of the strip plate, and a lifting component disposed on the side wall of the strip plate for lifting the height of the food boxes.

[0006] Preferably, the lifting assembly includes a rotating plate rotatably connected to both sides of the strip plate, a square plate rotatably connected to the end of the rotating plate away from the strip plate, a crossbar slidably connected to the inner wall of the square plate, and one end of the crossbar being fixedly connected to one side of the inner wall of the sterilization room.

[0007] Preferably, a connecting plate is fixedly connected to the bottom of the square plate, a clamping shell is fixedly connected to one side of the connecting plate, a sliding plate is slidably connected to the inner wall of the clamping shell, and compression springs are fixedly connected to both ends of one side of the sliding plate, with one end of the compression spring fixedly connected to one side of the inner wall of the clamping shell.

[0008] Preferably, both ends of the sliding plate away from the compression spring are fixedly connected to round rods, and the end of the round rod away from the sliding plate is fixedly connected to a clamping plate, and a strip hole is opened on one side of the clamping plate.

[0009] Preferably, a slider is slidably connected to the bottom end of the inner wall of the strip hole, a rotating bar is rotatably connected to one end of the slider, the end of the rotating bar away from the slider is rotatably connected to one side of the outer wall of the clamping shell, and a lifting plate is fixedly connected to the end of the slider away from the rotating bar.

[0010] Preferably, the outer wall of the clamping shell is provided with an adjustment component, the adjustment component including a flexible tube communicating with both sides of the clamping shell, the end of the flexible tube away from the clamping shell being connected to a fixed cylinder, and the bottom of the fixed cylinder being fixedly connected to the bottom of the inner wall of the sterilization chamber.

[0011] Preferably, a tension spring is fixedly connected to the bottom of the inner wall of the fixed cylinder, a piston rod is fixedly connected to the top of the tension spring, the bottom outer wall of the piston rod is slidably connected to the inner wall of the fixed cylinder, a toothed plate is fixedly connected to the top of the piston rod, a gear is meshed with one side of the outer wall of the toothed plate, and a rotating rod is fixedly connected to the inner wall of the gear.

[0012] Preferably, both ends of the rotating rod are rotatably connected to fixed blocks, the bottom of the fixed blocks is fixedly connected to the top of the working shell, the middle end of the rotating rod is fixedly connected to a reflector plate, the top two sides of the inner wall of the sterilization chamber are fixedly connected to concave frames, and the bottom of the concave frames is fixedly connected to a second electron beam device.

[0013] Preferably, the side wall of the fixed cylinder is provided with a speed reduction component, the speed reduction component includes a square shell communicating with both sides of the outer wall of the fixed cylinder, a return spring is fixedly connected to one side of the inner wall of the square shell, a conical slide plate is fixedly connected to one end of the return spring, the outer wall of the conical slide plate is slidably connected to the inner wall of the square shell, and exhaust holes are provided on both sides of the outer wall of the fixed cylinder near the square shell.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] This invention utilizes a lifting assembly to place the food box on top of a conveyor. Activating the conveyor transports the food box to the center of the sterilization chamber. Simultaneously, closing the conveyor activates an electric telescopic rod, causing the sterilization chamber to reciprocate between a strip plate and a first electron beam emitter. During this reciprocating motion, the first electron beam emitter emits an electron beam that sterilizes the top of the food box. The strip plate moves the lifting plate within the lifting assembly, causing the two lifting plates to move closer together, thus clamping the food box. The reaction force from the food box causes the clamping plate to gradually approach the clamping shell. During this process, a rotating bar drives a slider to rise vertically along the inner wall of the strip hole. The slider, in turn, drives the lifting plate upwards, ensuring a stable ascent of the food box. This shortens the distance between the food box and the first electron beam emitter, maximizing the electron beam's penetration and thus improving the sterilization effect.

[0016] This invention, through the coordinated arrangement of lifting and adjusting components, allows the sliding plate to slide towards the connecting plate inside the clamping shell during the lifting motion of the food container. This allows airflow from inside the clamping shell to enter the flexible tube, which then flows into the fixed cylinder. The airflow causes the piston rod inside the fixed cylinder to rise vertically, driving the gear plate upward. During this upward movement, the gear plate contacts the side wall of the gear, causing the gear to rotate. The gear then drives a rotating rod to rotate, interacting with a reflector plate. Since the mirror surface of the reflector plate comes into contact with the electron beam emitted by the second electron beam emitter, the deflected reflector plate reflects the electron beam. Through the deflection of the reflector plate, the electron beam is guided to the sides and bottom of the food container. This design effectively covers the sides and bottom, ensuring that the entire surface of the food container receives electron beam irradiation, thereby improving the comprehensiveness of the sterilization effect.

[0017] This invention, through the coordination of an adjustment component and a speed-reducing component, allows the piston rod to rise inside the fixed cylinder. The piston rod is elastically deformed by a return spring, which drives a conical sliding plate to slide inside the square shell. The two conical sliding plates approach each other, causing the rising piston rod to contact the conical surface of the sliding plate. The compression of the piston rod by the conical sliding plate reduces its rising rate, preventing the reflector plate from rotating too quickly. This slower speed ensures the reflector plate completes necessary adjustments within a precise timeframe, maximizing the sterilization effect of the electron beam. When the bottom of the piston rod reaches the top of the inner wall of the fixed cylinder, airflow is expelled through the exhaust port, preventing further upward movement. At this point, the elastic tension of the tension spring causes the piston rod to drive the toothed plate vertically downward, allowing the reflector plate to reposition and irradiate the outer wall of the food container with the electron beam, further enhancing the sterilization effect. Attached Figure Description

[0018] Figure 1This is a schematic cross-sectional view of the sterilization chamber of the present invention;

[0019] Figure 2 This is a top view of the fixing plate structure of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the strip plate structure of the present invention;

[0021] Figure 4 For the present invention Figure 3 Enlarged view of A in the middle;

[0022] Figure 5 This is a schematic cross-sectional view of the sliding plate structure of the present invention;

[0023] Figure 6 This is a schematic cross-sectional view of the clamping shell structure of the present invention;

[0024] Figure 7 This is a schematic cross-sectional view of the conical sliding plate structure of the present invention;

[0025] Figure 8 This is a schematic cross-sectional view of the concave frame structure of the present invention;

[0026] Figure 9 This is a schematic diagram of the side structure of the connecting plate of the present invention.

[0027] In the diagram: 1. Sterilization chamber; 2. Working shell; 3. Conveying component; 4. Fixing plate; 5. Freshness preservation and sterilization mechanism; 51. Electric telescopic rod; 52. Strip plate; 53. First electron beam device; 54. Lifting assembly; 56. Adjusting assembly; 57. Speed ​​reduction assembly; 541. Rotating plate; 542. Square plate; 543. Crossbar; 544. Connecting plate; 545. Clamping shell; 546. Sliding plate; 547. Compression spring; 548. Round rod; 549. Clamping plate; 54 10. Strip hole; 5411. Slider; 5412. Rotating bar; 5413. Lifting plate; 561. Flexible tube; 562. Fixed cylinder; 564. Piston rod; 563. Tension spring; 565. Gear plate; 566. Fixed block; 567. Rotating rod; 568. Gear; 569. Reflector plate; 5610. Concave frame; 5611. Second electron beam device; 571. Square shell; 572. Return spring; 573. Conical sliding plate; 574. Exhaust hole. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 9 As shown, the present invention provides a food preservation and sterilization device suitable for electron beam gradient irradiation, including a sterilization chamber 1, a working shell 2 fixedly connected to the bottom of the inner wall of the sterilization chamber 1, a conveying component 3 provided inside the working shell 2 for conveying food boxes, a fixing plate 4 fixedly connected to the top of the inner wall of the sterilization chamber 1, and also includes;

[0030] The preservation and sterilization mechanism 5 includes an electric telescopic rod 51 fixedly connected to one side of the fixed plate 4. A strip plate 52 is fixedly connected to the movable end of the electric telescopic rod 51. A first electron beam device 53 is fixedly connected to the bottom of the strip plate 52. A lifting component 54 is provided on the side wall of the strip plate 52 for lifting the height of the food box.

[0031] Using the above scheme: place the food box on top of the conveyor 3, start the conveyor 3 to transport the food box to the center of the sterilization chamber 1, and at the same time close the conveyor 3, start the electric telescopic rod 51. The sterilization chamber 1 drives the strip plate 52 and the first electron beam device 53 to move back and forth. During the reciprocating movement of the first electron beam device 53, it emits an electron beam to sterilize the top of the food box.

[0032] The lifting assembly 54 includes a rotating plate 541 rotatably connected to both sides of the strip plate 52. A square plate 542 is rotatably connected to one end of the rotating plate 541 away from the strip plate 52. A crossbar 543 is slidably connected to the inner wall of the square plate 542. One end of the crossbar 543 is fixedly connected to one side of the inner wall of the sterilization room 1.

[0033] A connecting plate 544 is fixedly connected to the bottom of the square plate 542. A clamping shell 545 is fixedly connected to one side of the connecting plate 544. A sliding plate 546 is slidably connected to the inner wall of the clamping shell 545. A compression spring 547 is fixedly connected to both ends of one side of the sliding plate 546. One end of the compression spring 547 is fixedly connected to one side of the inner wall of the clamping shell 545.

[0034] The above solution is adopted: by the elastic deformation of the compression spring 547, the compression spring 547 compresses the sliding plate 546, so that the sliding plate 546 continuously moves away from the connecting plate 544 inside the clamping shell 545.

[0035] Both ends of the sliding plate 546 away from the compression spring 547 are fixedly connected to round rods 548. The end of the round rod 548 away from the sliding plate 546 is fixedly connected to a clamping plate 549. A strip hole 5410 is opened on one side of the clamping plate 549.

[0036] A slider 5411 is slidably connected to the bottom of the inner wall of the strip hole 5410. A rotating bar 5412 is rotatably connected to one end of the slider 5411. The end of the rotating bar 5412 away from the slider 5411 is rotatably connected to the outer wall of the clamping shell 545. A lifting plate 5413 is fixedly connected to the end of the slider 5411 away from the rotating bar 5412.

[0037] Using the above scheme: the strip plate 52 drives the rotating plate 541 to move, the rotating plate 541 drives the square plate 542 to slide along the outer wall of the crossbar 543, the square plate 542 drives the connecting plate 544 and the clamping shell 545 to move, the clamping shell 545 drives the sliding plate 546 and the round rod 548 to move, the round rod 548 drives the clamping plate 549 and the lifting plate 5413 to move, and the two lifting plates 5413 move closer to each other, thereby clamping the food box.

[0038] like Figures 1 to 9 As shown, the outer wall of the clamping shell 545 is provided with an adjustment component 56. The adjustment component 56 includes a flexible tube 561 connected to both sides of the clamping shell 545. The end of the flexible tube 561 away from the clamping shell 545 is connected to a fixed cylinder 562. The bottom of the fixed cylinder 562 is fixedly connected to the bottom of the inner wall of the sterilization room 1.

[0039] A tension spring 563 is fixedly connected to the bottom of the inner wall of the fixed cylinder 562. A piston rod 564 is fixedly connected to the top of the tension spring 563. The bottom outer wall of the piston rod 564 is slidably connected to the inner wall of the fixed cylinder 562. A toothed plate 565 is fixedly connected to the top of the piston rod 564. A gear 568 is meshed with one side of the outer wall of the toothed plate 565. A rotating rod 567 is fixedly connected to the inner wall of the gear 568.

[0040] Both ends of the rotating rod 567 are rotatably connected to fixed blocks 566. The bottom of the fixed blocks 566 is fixedly connected to the top of the working shell 2. The middle end of the rotating rod 567 is fixedly connected to a reflector plate 569. The top two sides of the inner wall of the sterilization room 1 are fixedly connected to concave frames 5610. The bottom of the concave frames 5610 is fixedly connected to a second electron beam device 5611.

[0041] Using the above scheme: the sliding plate 546 will slide inside the clamping shell 545 towards the connecting plate 544, so that the airflow inside the clamping shell 545 enters the interior of the flexible tube 561. The airflow enters the interior of the fixed cylinder 562 through the flexible tube 561. The airflow causes the piston rod 564 inside the fixed cylinder 562 to rise vertically. The piston rod 564 drives the toothed plate 565 to move upward. During the upward movement, the toothed plate 565 will contact the side wall of the gear 568, causing the gear 568 to rotate. The gear 568 drives the rotating rod 567 and the reflector plate 569 to rotate.

[0042] The side wall of the fixed cylinder 562 is provided with a speed reduction component 57. The speed reduction component 57 includes a square shell 571 connected to both sides of the outer wall of the fixed cylinder 562. A return spring 572 is fixedly connected to one side of the inner wall of the square shell 571. A conical slide plate 573 is fixedly connected to one end of the return spring 572. The outer wall of the conical slide plate 573 is slidably connected to the inner wall of the square shell 571. The fixed cylinder 562 is provided with exhaust holes 574 on both sides of the outer wall of the square shell 571.

[0043] The above scheme is adopted: when the piston rod 564 rises inside the fixed cylinder 562, it is subjected to the elastic deformation of the return spring 572. The return spring 572 drives the conical slide plate 573 to slide inside the square shell 571. The two conical slide plates 573 approach each other. At this time, the rising piston rod 564 will contact the conical surface of the conical slide plate 573. Due to the compression of the piston rod 564 by the clamping conical slide plate 573, the rising rate of the piston rod 564 can be reduced, preventing the reflector plate 569 from rotating too fast.

[0044] Working principle and usage process of this invention:

[0045] The food box is placed on top of the conveyor 3. The conveyor 3 is started, transporting the food box to the center of the sterilization chamber 1. Simultaneously, the conveyor 3 is closed, and the electric telescopic rod 51 is activated. The sterilization chamber 1 causes the strip plate 52 and the first electron beam device 53 to reciprocate. During this reciprocating motion, the first electron beam device 53 emits an electron beam to sterilize the top of the food box. The strip plate 52 drives the rotating plate 541 to move. The rotating plate 541 drives the square plate 542 to slide along the outer wall of the crossbar 543. The square plate 542 drives the connecting plate 544 and the clamping shell 545 to move. The clamping shell 545 drives the sliding plate 546 and the round rod 548 to move. The round rod 548 drives the clamping plate 549 and the lifting plate 5413 to move. The two lifting plates 5413 move closer together, thus clamping the food box. The reaction force from the food box causes the clamping plate 549 to gradually approach the clamping shell 545. During this process, the rotating bar 5412 drives the slider 5411 to rise vertically along the inner wall of the strip hole 5410. The slider 5411 drives the lifting plate 5413 to rise, thereby making the food box rise stably, shortening the distance between the food box and the first electron beam device 53, ensuring the maximum penetration effect of the electron beam, and thus improving the sterilization effect.

[0046] When the food box is lifted, the sliding plate 546 slides inside the clamping shell 545 towards the connecting plate 544, allowing the airflow inside the clamping shell 545 to enter the flexible tube 561. The airflow then enters the fixed cylinder 562 through the flexible tube 561. The airflow causes the piston rod 564 inside the fixed cylinder 562 to rise vertically. The piston rod 564 drives the toothed plate 565 to move upward. During the upward movement, the toothed plate 565 contacts the side wall of the gear 568, causing the gear 568 to rotate. The gear 568 drives the rotating rod 567 and the reflector plate 569 to rotate. Since the mirror surface of the reflector plate 569 comes into contact with the electron beam emitted by the second electron beam device 5611, the deflected reflector plate 569 reflects the electron beam. Through the deflection of the reflector plate 569, the electron beam is guided to the side and bottom of the food box. This design effectively covers the sides and bottom, ensuring that the entire surface of the food container is irradiated by the electron beam, thereby improving the comprehensiveness of the sterilization effect.

[0047] When the piston rod 564 rises inside the fixed cylinder 562, it is elastically deformed by the return spring 572. The return spring 572 drives the conical slide plate 573 to slide inside the square shell 571. The two conical slide plates 573 approach each other. At this time, the rising piston rod 564 will contact the conical surface of the conical slide plate 573. Due to the compression of the piston rod 564 by the clamping conical slide plate 573, the rising rate of the piston rod 564 can be reduced, preventing the reflector plate 569 from rotating too fast. The slower movement speed can ensure that the reflector plate 569 completes the necessary adjustment in an accurate time, maximizing the sterilization effect of the electron beam. When the bottom end of the piston rod 564 rises to the top of the inner wall of the fixed cylinder 562, the airflow will be discharged outward through the opening of the exhaust hole 574, and the piston rod 564 will no longer rise. At this time, under the elastic tension of the tension spring 563, the piston rod 564 drives the toothed plate 565 to descend vertically, so that the reflector plate 569 can enable the electron beam to perform reset irradiation on the outer wall of the food box, further improving the sterilization effect.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations 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 food preservation and sterilization device suitable for electron beam gradient irradiation, comprising a sterilization chamber (1), wherein a working shell (2) is fixedly connected to the bottom of the inner wall of the sterilization chamber (1), a conveying component (3) is provided inside the working shell (2) for conveying food boxes, and a fixing plate (4) is fixedly connected to the top of the inner wall of the sterilization chamber (1), characterized in that: Also includes; The preservation and sterilization mechanism (5) includes an electric telescopic rod (51) fixedly connected to one side of the fixed plate (4). The movable end of the electric telescopic rod (51) is fixedly connected to a strip plate (52). The bottom of the strip plate (52) is fixedly connected to a first electron beam device (53). The side wall of the strip plate (52) is provided with a lifting component (54) for lifting the height of the food box.

2. The food preservation and sterilization device suitable for electron beam gradient irradiation according to claim 1, characterized in that: The lifting assembly (54) includes a rotating plate (541) rotatably connected to both sides of the strip plate (52). A square plate (542) is rotatably connected to one end of the rotating plate (541) away from the strip plate (52). A crossbar (543) is slidably connected to the inner wall of the square plate (542). One end of the crossbar (543) is fixedly connected to one side of the inner wall of the sterilization room (1).

3. The food preservation and sterilization device suitable for electron beam gradient irradiation according to claim 2, characterized in that: A connecting plate (544) is fixedly connected to the bottom of the square plate (542). A clamping shell (545) is fixedly connected to one side of the connecting plate (544). A sliding plate (546) is slidably connected to the inner wall of the clamping shell (545). A compression spring (547) is fixedly connected to both ends of one side of the sliding plate (546). One end of the compression spring (547) is fixedly connected to one side of the inner wall of the clamping shell (545).

4. The food preservation and sterilization device suitable for electron beam gradient irradiation according to claim 3, characterized in that: Both ends of the sliding plate (546) away from the compression spring (547) are fixedly connected to round rods (548), and the end of the round rod (548) away from the sliding plate (546) is fixedly connected to a clamping plate (549). A strip hole (5410) is opened on one side of the clamping plate (549).

5. The food preservation and sterilization device suitable for electron beam gradient irradiation according to claim 4, characterized in that: A slider (5411) is slidably connected to the bottom of the inner wall of the strip hole (5410). A rotating bar (5412) is rotatably connected to one end of the slider (5411). The end of the rotating bar (5412) away from the slider (5411) is rotatably connected to one side of the outer wall of the clamping shell (545). A lifting plate (5413) is fixedly connected to the end of the slider (5411) away from the rotating bar (5412).

6. The food preservation and sterilization device suitable for electron beam gradient irradiation according to claim 5, characterized in that: The outer wall of the clamping shell (545) is provided with an adjustment component (56). The adjustment component (56) includes a flexible tube (561) connected to both sides of the clamping shell (545). The end of the flexible tube (561) away from the clamping shell (545) is connected to a fixed cylinder (562). The bottom of the fixed cylinder (562) is fixedly connected to the bottom of the inner wall of the sterilization room (1).

7. The food preservation and sterilization device suitable for electron beam gradient irradiation according to claim 6, characterized in that: A tension spring (563) is fixedly connected to the bottom of the inner wall of the fixed cylinder (562), and a piston rod (564) is fixedly connected to the top of the tension spring (563). The bottom outer wall of the piston rod (564) is slidably connected to the inner wall of the fixed cylinder (562). A toothed plate (565) is fixedly connected to the top of the piston rod (564). A gear (568) is meshed with one side of the outer wall of the toothed plate (565), and a rotating rod (567) is fixedly connected to the inner wall of the gear (568).

8. The food preservation and sterilization device suitable for electron beam gradient irradiation according to claim 7, characterized in that: The outer walls of both ends of the rotating rod (567) are rotatably connected to fixed blocks (566). The bottom of the fixed blocks (566) is fixedly connected to the top of the working shell (2). The outer wall of the middle end of the rotating rod (567) is fixedly connected to a reflector plate (569). The top two sides of the inner wall of the sterilization chamber (1) are fixedly connected to concave frames (5610). The bottom of the concave frames (5610) is fixedly connected to a second electron beam device (5611).

9. The food preservation and sterilization device suitable for electron beam gradient irradiation according to claim 8, characterized in that: The side wall of the fixed cylinder (562) is provided with a speed reduction component (57). The speed reduction component (57) includes a square shell (571) connected to both sides of the outer wall of the fixed cylinder (562). A return spring (572) is fixedly connected to one side of the inner wall of the square shell (571). A conical slide plate (573) is fixedly connected to one end of the return spring (572). The outer wall of the conical slide plate (573) is slidably connected to the inner wall of the square shell (571). The fixed cylinder (562) is provided with exhaust holes (574) on both sides of the outer wall of the square shell (571).

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