Device for quickly killing rice weevils in rice and method of using the same

Abstract

The present invention relates to the technical field of disorientation killing, in particular to a device for rapidly killing rice weevils in rice, comprising a killing chamber, a feeding mechanism is arranged on one side of the killing chamber, and a liquid nitrogen adding chamber is arranged on the lower side of the killing chamber; a throttling mechanism is arranged inside the killing chamber, and the intercepting mechanism inputs rice into the liquid nitrogen adding chamber for killing rice weevils, and after the killing is completed, the intercepting mechanism inputs rice into a low temperature chamber; a material control mechanism is arranged on the side wall of the feeding mechanism; the intercepting mechanism moves downward, the material control mechanism opens, and the rice enters the intercepting mechanism and is sent to the liquid nitrogen adding chamber by the intercepting mechanism. After killing, some rice bricks are taken as retention, placed for one month, and whether adults grow out during the observation period. If so, the killing of rice weevils and their eggs is not thorough; if no rice weevils grow out, the effect is good. It has been verified by experiments that the rice infected by rice weevils is placed for one month after the above treatment, and no adults are found to grow out.

Description

Technical Field

[0001] The invention relates to the technical field of killing rice weevils, in particular to a device for quickly killing rice weevils in rice and a use method thereof. Background Art

[0002] Rice is prone to insects. Rice weevils are insects that can easily survive in rice. Therefore, the rice needs to be killed after being bagged to ensure the quality of the rice. The effect of killing rice weevils at low temperatures is more ideal. The existing rice weevils are killed by high-temperature dry heat, which takes a long time and requires high dryness of the rice. Summary of the invention

[0003] In view of the problems in the prior art, the present invention provides a rapid killing device for rice weevils in rice, comprising a killing chamber, a feeding mechanism is arranged on one side of the killing chamber, a liquid nitrogen adding chamber is arranged on one side below the killing chamber, a low-temperature chamber is arranged on one side of the killing chamber, a discharging chamber is arranged below the low-temperature chamber, and the discharging chamber is located on one side of the killing chamber; an intercepting mechanism is arranged inside the killing chamber, the intercepting mechanism inputs rice into the liquid nitrogen adding chamber for killing rice weevils, and after the killing is completed, the intercepting mechanism inputs rice into the low-temperature chamber; a material control mechanism is arranged on the side wall of the feeding mechanism, and the material control mechanism conflicts with the intercepting mechanism; the intercepting mechanism moves downward, the material control mechanism opens, and the rice enters the intercepting mechanism and is sent to the liquid nitrogen adding chamber by the intercepting mechanism; the feeding mechanism comprises a storage bin, and an inclined baffle for guiding rice is arranged inside the storage bin.

[0004] Preferably, the intercepting mechanism includes an intercepting net movably arranged inside the killing chamber, two side plates are arranged at the bottom of the intercepting net, the side plates cooperate with the liquid nitrogen adding chamber, baffles are fixedly connected around the intercepting net, a feed port is provided on one side of the baffle, a discharge port is provided on the baffle opposite to the feed port, two hydraulic telescopic rods are arranged on the baffle, and the ends of the hydraulic telescopic rods are rotatably arranged in the inner wall of the killing chamber.

[0005] Preferably, two sets of guide wheels are respectively provided at both ends of the baffle, and the guide wheels include a first guide wheel and a second guide wheel. A slide groove is provided inside the killing chamber, and the first guide wheel slides inside the slide groove. An arc groove is provided inside the killing chamber, and the second guide wheel slides inside the arc groove.

[0006] Preferably, the killing chamber wall is provided with an inner groove and a lifting plate, the bottom side wall of the lifting plate is provided with a stopper protruding outward, the lifting plate slides in the inner groove; the stopper and the baffle are in contact. When the baffle moves upward, the baffle will squeeze the stopper, and the stopper will drive the lifting plate to move upward, so that when the intercepting net is tilted, the baffle is lifted at the same time, so that the rice can enter the low-temperature chamber from the discharge port.

[0007] Preferably, the liquid nitrogen adding chamber includes an adding port opened on the side wall of the killing chamber for adding liquid nitrogen, and the adding port is connected to a liquid nitrogen tank, and the liquid nitrogen tank is arranged at the bottom of the killing chamber.

[0008] Preferably, the material control mechanism includes a door panel arranged on the inner wall of the killing chamber, a top spring is arranged at the bottom of the door panel, two sets of springs are arranged on the storage bin, the springs are located on one side of the door panel, a plate groove is arranged at the top of the killing chamber, and the door panel is slidably connected to the inside of the plate groove.

[0009] Preferably, two vertical guide grooves are provided inside the door panel, the bottom of the guide groove is connected to a transverse groove, a stabilizing rod is slidably installed inside the door panel, a guide rod is provided on the stabilizing rod, and the guide rod slides inside the guide groove and the transverse groove.

[0010] Preferably, the end of the stabilizing rod is rotatably connected to a movable block via a rotating shaft, and a limit block for limiting the movable block is arranged at the bottom of the movable block; when the top block moves upward, the top block pushes the movable block during the upward movement, and the movable block flips; the top block pushes the movable block to move downward synchronously during the downward movement, until the stabilizing rod is squeezed by the movable block and the top spring is separated.

[0011] The method for using the device for rapidly killing rice weevils in rice specifically comprises the following steps:

[0012] Step 1: The packaged rice is transported to the interior of the liquid nitrogen adding chamber through the interception mechanism, and immersed in the liquid nitrogen adding chamber for 0.5-3.5 minutes for low-temperature pretreatment, the treatment temperature is -147 to -209 ° C, and after the treatment is completed, the rice is fished out through the interception mechanism;

[0013] Step 2: The pretreated rice is transferred from the killing chamber to the -20 ºC low-temperature chamber through the interception mechanism and kept for 12-80 minutes to kill the rice weevil adults and eggs in the rice;

[0014] Step 3: After the rice is processed in the cryogenic chamber, it is sent out of the -20 ºC cryogenic chamber and allowed to slowly return to room temperature in the discharge chamber. During this period, moisture caused by the freezing process can also be eliminated; finally, the rice is stored.

[0015] Beneficial effects of the present invention:

[0016] (1) The feeding mechanism is provided to facilitate the input of rice into the killing chamber to kill rice weevils by low temperature, the killing chamber is provided to cooperate with liquid nitrogen to kill rice weevils in rice, the intercepting mechanism is provided to feed rice into the liquid nitrogen adding chamber, and it is also convenient to transport rice to the low temperature chamber when the intercepting mechanism is lifted, and the intercepting mechanism is loaded with rice through the cooperation of the material control mechanism during the process of the intercepting mechanism descending, so as to facilitate the input of rice into the liquid nitrogen adding chamber for killing; after killing, some rice bricks are taken as retention and placed for one month to observe whether adults grow during the period. If so, the killing of rice weevils and their eggs is not thorough; if no rice weevils grow, the effect is good. It has been verified by experiments that after the rice infected with rice weevils was placed for one month after the above treatment, no adult was found to grow.

[0017] (2) When the rice needs to be put into the large intercepting net, the hydraulic telescopic rod is first started, and the hydraulic telescopic rod is retracted upward, so that the hydraulic telescopic rod drives the baffle to rise. The hydraulic telescopic rod and the baffle are rotatably connected. When the baffle rises, the baffle will drive the intercepting net to rise synchronously. When the baffle rises, the baffle connected to the first guide wheel will slide upward inside the slide until the first guide wheel slides to the top of the slide. At this time, due to the limited length of the slide, when the hydraulic telescopic rod continues to pull the baffle upward, the second guide wheel slides inside the arc groove and rotates in a circle around the first guide wheel as the center of the circle, so that the position of the feed inlet is higher than the position of the discharge port, so that the rice on the intercepting net will enter the low-temperature chamber from the discharge port; when the hydraulic telescopic rod moves downward, the baffle will drive the second guide wheel to make a circular motion around the first guide wheel until the intercepting net becomes horizontal. The hydraulic telescopic rod continues to move downward until the top block is squeezed on the material control mechanism during the downward movement, so that the material control mechanism opens and the rice is input from the feed inlet to the intercepting net.

[0018] (3) When the top block moves downward, it will squeeze the movable block located below it and matched with it. Since a limit block is set at the bottom of the movable block, the movable block will not rotate downward at this time, so that the movable block will drive the stabilizing bar to slide downward synchronously. After the stabilizing bar slides downward and the travel of the guide bar inside the guide groove has not reached the maximum value, the hydraulic telescopic rod stops moving downward. At this time, the stabilizing rod pulls the door panel downward until a large notch for feeding is formed between the door panel and the plate groove, and the rice will enter the intercepting net; the hydraulic telescopic rod continues to move downward. Move, the hydraulic telescopic rod will drive the baffle to push the top block downward, when the top block pushes the stabilizing rod to move from the inside of the guide groove to the inside of the cross groove, the movable block will be separated from the top block; under the action of the top spring, the stabilizing rod is pushed into the inside of the guide groove, and under the action of the spring, the door panel moves up until the door panel is stuck in the inside of the panel groove, or the rice is stuck. At this time, the rice inside the storage bin will not enter the intercepting net, and the hydraulic telescopic rod continues to move downward until the rice is transported to the inside of the liquid nitrogen adding chamber, and the rice is placed in the liquid nitrogen adding chamber for 0.5-3.5 min. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 A is an enlarged structural diagram;

[0023] Figure 4 This is one of the three-dimensional structural schematic diagrams of the intercepting mechanism of the present invention;

[0024] Figure 5 This is the second schematic diagram of the three-dimensional structure of the intercepting mechanism of the present invention;

[0025] In the figure: 1. feeding mechanism; 11. storage bin; 12. inclined baffle; 2. liquid nitrogen adding chamber; 21. adding port; 22. liquid nitrogen tank; 3. killing chamber; 4. low temperature chamber; 41. stop block; 42. lifting plate; 43. inner tank; 5. discharging chamber; 6. intercepting mechanism; 61. intercepting net; 62. side plate; 63. discharge port; 64. first guide wheel; 65. slide groove; 66. second guide wheel; 67. arc groove; 68. top block; 69. baffle; 610. feeding port; 611. hydraulic telescopic rod; 7. material control mechanism; 71. door panel; 72. plate groove; 73. guide groove; 74. transverse groove; 75. guide rod; 76. stabilizing rod; 77. rotating shaft; 78. movable block; 79. limit block; 710. spring; 711. top spring. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0027] like Figure 1-5 As shown, the rapid killing device for rice weevils in rice of the present invention comprises a killing chamber 3, a feeding mechanism 1 is provided on one side of the killing chamber 3, a liquid nitrogen adding chamber 2 is provided on one side below the killing chamber 3, a low temperature chamber 4 is provided on one side of the killing chamber 3, a discharging chamber 5 is provided below the low temperature chamber 4, and the discharging chamber 5 is located on one side of the killing chamber 3; a throttling mechanism is provided inside the killing chamber 3, the intercepting mechanism 6 inputs rice into the liquid nitrogen adding chamber 2 for killing rice weevils, and after the killing is completed, the intercepting mechanism 6 inputs rice into the low temperature chamber 4; a material control mechanism 7 is provided on the side wall of the feeding mechanism 1, and the material control mechanism 7 conflicts with the intercepting mechanism 6; the intercepting mechanism 6 moves downward, the material control mechanism 7 is opened, and the rice enters the intercepting mechanism 6 and is sent to the liquid nitrogen adding chamber 2 by the intercepting mechanism 6; the feeding mechanism 1 comprises a storage bin 11, and an inclined baffle 12 for guiding rice is provided inside the storage bin 11. The feeding mechanism 1 provided can facilitate the input of rice into the killing chamber 3 to kill rice weevils at low temperature, the killing chamber 3 provided cooperates with liquid nitrogen to kill rice weevils in rice, the intercepting mechanism 6 provided can feed rice into the liquid nitrogen adding chamber 2, and can also facilitate the transportation of rice to the low temperature chamber 4 when the intercepting mechanism 6 is lifted, and the intercepting mechanism 6 is loaded with rice by the cooperation of the material control mechanism 7 during the descent of the intercepting mechanism 6, so as to facilitate the input of rice into the liquid nitrogen adding chamber 2 for killing; after killing, take part of the rice bricks as retention, place for one month, and observe whether there are any adults growing during the observation period. If there are, the killing of rice weevils and their eggs is not thorough; if no rice weevils grow, the effect is good. It has been verified by experiments that the rice infected by rice weevils is placed for one month after the above treatment, and no adults are found to grow.

[0028] Specifically, the intercepting mechanism 6 includes an intercepting net 61 movably arranged inside the killing chamber 3, two side plates 62 are arranged at the bottom of the intercepting net 61, and the side plates 62 cooperate with the liquid nitrogen adding chamber 2. The intercepting net 61 is fixedly connected with baffles 69 around it, and a feed port 610 is provided on one side of the baffle 69, and a discharge port 63 is provided on the baffle 69 opposite to the feed port 610. Two hydraulic telescopic rods 611 are arranged on the baffle 69, and the ends of the hydraulic telescopic rods 611 are rotatably arranged in the inner wall of the killing chamber 3. Two sets of guide wheels are respectively arranged at both ends of the baffle 69, and the guide wheels include a first guide wheel 64 and a second guide wheel 66. A slide groove 65 is arranged inside the killing chamber 3, and the first guide wheel 64 slides inside the slide groove 65. An arc groove 67 is arranged inside the killing chamber 3, and the second guide wheel 66 slides inside the arc groove 67. When it is necessary to put rice on the large intercepting net 61, the hydraulic telescopic rod 611 is first started, and the hydraulic telescopic rod 611 is retracted upward, so that the hydraulic telescopic rod 611 drives the baffle 69 to rise. The hydraulic telescopic rod 611 and the baffle 69 are rotatably connected. When the baffle 69 rises, the baffle 69 will drive the intercepting net 61 to rise synchronously. When the baffle 69 rises, the baffle 69 connected to the first guide wheel 64 will slide upward inside the slide 65 until the first guide wheel 64 slides to the top of the slide 65. At this time, due to the limited length of the slide 65, when the hydraulic telescopic rod 611 continues to pull the baffle 69 to move upward, the second guide wheel 66 It slides inside the arc groove 67 and rotates in a circle around the first guide wheel 64 as the center of the circle, so that the position of the feed port 610 is higher than the position of the discharge port 63, so that the rice on the intercepting net 61 will enter the low-temperature chamber 4 from the discharge port 63; when the hydraulic telescopic rod 611 moves downward, the baffle 69 will drive the second guide wheel 66 to make a circular motion around the first guide wheel 64 until the intercepting net 61 becomes horizontal, and the hydraulic telescopic rod 611 continues to move downward until the top block 68 is squeezed onto the material control mechanism 7 during the downward movement, so that the material control mechanism 7 opens and inputs the rice from the feed port 610 to the intercepting net 61. The chamber wall of the killing chamber 3 is provided with an inner groove 43 and a lifting plate 42, and the bottom side wall of the lifting plate 42 is provided with a stopper 41 protruding outward, and the lifting plate 42 slides in the inner groove 43; the stopper 41 and the baffle 69 are in contact with each other. When the baffle 69 moves upward, the baffle 69 will squeeze the stop block 41, and the stop block 41 will drive the lifting plate 42 to move upward, so that when the intercepting net 61 is tilted, the baffle 69 is lifted at the same time, so that the rice will enter the low-temperature chamber 4 from the discharge port 63.

[0029] Specifically, the liquid nitrogen adding chamber 2 includes an adding port 21 opened on the side wall of the killing chamber 3 for adding liquid nitrogen. The adding port 21 is connected to a liquid nitrogen tank 22 , and the liquid nitrogen tank 22 is arranged at the bottom of the killing chamber 3 .

[0030] Specifically, the material control mechanism 7 includes a door panel 71 arranged on the inner wall of the killing chamber 3, a top spring 711 is arranged at the bottom of the door panel 71, two groups of springs 710 are arranged on the material storage bin 11, and the spring 710 is located on one side of the door panel 71. A plate groove 72 is arranged at the top of the killing chamber 3, and the door panel 71 is slidably connected inside the plate groove 72. Two vertical guide grooves 73 are arranged inside the door panel 71, and the bottom of the guide groove 73 is connected to a horizontal transverse groove 74. A stabilizing rod 76 is slidably installed inside the door panel 71, and a guide rod 75 is arranged on the stabilizing rod 76. The guide rod 75 slides inside the guide groove 73 and the transverse groove 74. The end of the stabilizing rod 76 is rotatably connected to a movable block 78 via a rotating shaft 77, and a limiting block 79 is provided at the bottom of the movable block 78 for limiting the movable block 78; when the top block 68 moves upward, the top block 68 pushes the movable block 78 during the upward movement, and the movable block 78 flips; the top block 68 pushes the movable block 78 to move downward synchronously during the downward movement, until the stabilizing rod 76 is squeezed by the movable block 78 to separate from the top spring 711. When the top block 68 moves downward, the top block 68 will squeeze the movable block 78 located below and matched with it. Since a limit block 79 is provided at the bottom of the movable block 78, the movable block 78 will not rotate downward at this time, so that the movable block 78 will drive the stabilizing rod 76 to slide downward synchronously. After the stabilizing rod 76 slides downward and the stroke of the guide rod 75 in the guide groove 73 does not reach the maximum value, the hydraulic telescopic rod 611 stops moving downward. At this time, the stabilizing rod 76 pulls the door plate 71 downward until a large feeding notch is formed between the door plate 71 and the plate groove 72, and the rice will enter the intercepting net 61; the hydraulic telescopic rod 611 continues to move downward, and the hydraulic The pressing telescopic rod 611 will drive the baffle 69 to push the top block 68 downward. When the top block 68 pushes the stabilizing rod 76 to move from the inside of the guide groove 73 to the inside of the transverse groove 74, the movable block 78 will be separated from the top block 68; under the action of the top spring 711, the stabilizing rod 76 is pushed into the inside of the guide groove 73, and under the action of the spring 710, the door plate 71 moves upward until the door plate 71 is stuck in the inside of the plate groove 72, or the rice is stuck. At this time, the rice inside the storage bin 11 will not enter the intercepting net 61, and the hydraulic telescopic rod 611 continues to move downward until the rice is transported to the inside of the liquid nitrogen adding chamber 2, and the rice is placed in the liquid nitrogen adding chamber 2 for 0.5-3.5 min.

[0031] When the present invention is in use, firstly, appropriately packaged rice is added to the storage bin 11, and the hydraulic telescopic rod 611 is started. The hydraulic telescopic rod 611 contracts upward, so that the hydraulic telescopic rod 611 drives the baffle 69 to rise. The hydraulic telescopic rod 611 and the baffle 69 are rotatably connected. When the baffle 69 rises, the baffle 69 drives the intercepting net 61 to rise synchronously. When the baffle 69 rises, the baffle 69 connected to the first guide wheel 64 slides upward inside the slide 65 until the first guide wheel 64 slides to the top of the slide 65. At this time, due to the limited length of the slide 65, when the hydraulic telescopic rod 61 continues to pull the baffle 69 to move upward, the second guide wheel 66 The rice on the intercepting net 61 will enter the low-temperature chamber 4 from the discharge port 63; when the baffle plate 69 moves upward, the baffle plate 69 will squeeze the stop block 41, and the stop block 41 will drive the lifting plate 42 to move upward, so that when the intercepting net 61 is tilted, the baffle plate 69 will be lifted at the same time, so that the rice will enter the low-temperature chamber 4 from the discharge port 63; when the hydraulic telescopic rod 611 moves downward, the baffle plate 69 will drive the second guide wheel 66 to make a circular motion around the first guide wheel 64 first, until the intercepting net 61 becomes The hydraulic telescopic rod 611 is in a horizontal position, and the hydraulic telescopic rod 611 continues to move downward until the top block 68 is squeezed by the movable block 78 during the downward movement. Since the limit block 79 is provided at the bottom of the movable block 78, the movable block 78 will not rotate downward at this time, so that the movable block 78 will drive the stabilizing rod 76 to slide downward synchronously. When the stabilizing rod 76 slides downward and the stroke of the guide rod 75 in the guide groove 73 does not reach the maximum value, the hydraulic telescopic rod 611 stops moving downward. At this time, the stabilizing rod 76 pulls the door plate 71 downward until a large feeding notch is formed between the door plate 71 and the plate groove 72, and the rice will enter the intercepting net 61; the hydraulic telescopic rod 611 continues to move downward. When the rice is moved downward, the hydraulic telescopic rod 611 will drive the baffle 69 to push the top block 68 downward. When the top block 68 pushes the stabilizing rod 76 to move from the inside of the guide groove 73 to the inside of the transverse groove 74, the movable block 78 will be separated from the top block 68; under the action of the top spring 711, the stabilizing rod 76 is pushed into the inside of the guide groove 73, and under the action of the spring 710, the door plate 71 moves upward until the door plate 71 is stuck in the inside of the plate groove 72, or the rice is stuck. At this time, the rice in the storage bin 11 will not enter the intercepting net 61, and the hydraulic telescopic rod 611 continues to move downward until the rice is transported to the inside of the liquid nitrogen adding chamber 2, and the rice is placed in the liquid nitrogen adding chamber 2 0.5-3.5 minutes; finally, the pretreated rice is transferred from the killing chamber 3 to the -20 ºC low-temperature chamber 4 through the interception mechanism 6, and kept for 12-80 minutes to kill the rice weevils and eggs in the rice; after the rice is treated in the low-temperature chamber 4, the rice is sent out of the -20 ºC low-temperature chamber 4, and the rice enters the discharge chamber 5 to slowly recover to room temperature, during which the moisture caused by the freezing process can also be eliminated; finally, the rice is stored. .

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for rapidly killing rice weevils in rice, comprising a killing chamber (3), a feeding mechanism (1) being arranged on one side of the killing chamber (3), a liquid nitrogen adding chamber (2) being arranged on one side below the killing chamber (3), a low temperature chamber (4) being arranged on one side of the killing chamber (3), a discharging chamber (5) being arranged below the low temperature chamber (4), and the discharging chamber (5) being located on one side of the killing chamber (3); a cut-off mechanism being arranged inside the killing chamber (3), and the cut-off mechanism (6) inputting rice into the liquid nitrogen adding chamber (2) for killing the rice weevils After the killing is completed, the interception mechanism (6) inputs the rice into the interior of the low-temperature chamber (4); the side wall of the feeding mechanism (1) is provided with a material control mechanism (7), and the material control mechanism (7) conflicts with the interception mechanism (6); the interception mechanism (6) moves downward, the material control mechanism (7) opens, and the rice enters the interior of the interception mechanism (6) and is sent by the interception mechanism (6) to the interior of the liquid nitrogen addition chamber (2); the feeding mechanism (1) includes a storage bin (11), and the interior of the storage bin (11) is provided with an inclined baffle (12) for guiding the rice; The intercepting mechanism (6) comprises an intercepting net (61) movably arranged inside the killing chamber (3); two side plates (62) are arranged at the bottom of the intercepting net (61); the side plates (62) cooperate with the liquid nitrogen adding chamber (2); baffles (69) are fixedly connected to the four sides of the intercepting net (61); a feed inlet (610) is provided on one side of the baffle (69); a discharge inlet (63) is provided on the baffle (69) opposite to the feed inlet (610); two hydraulic telescopic rods (611) are arranged on the baffle (69); the ends of the hydraulic telescopic rods (611) are rotatably arranged in the inner wall of the killing chamber (3); Two sets of guide wheels are respectively provided at both ends of the baffle (69), the guide wheels comprising a first guide wheel (64) and a second guide wheel (66); a slide groove (65) is provided inside the killing chamber (3); the first guide wheel (64) slides inside the slide groove (65); an arc groove (67) is provided inside the killing chamber (3); the second guide wheel (66) slides inside the arc groove (67); An inner groove (43) and a lifting plate (42) are provided on the wall of the killing chamber (3); a stopper (41) protruding outward is provided on the bottom side wall of the lifting plate (42); the lifting plate (42) slides in the inner groove (43); the stopper (41) and the baffle (69) are in contact with each other; when the baffle (69) moves upward, the baffle (69) presses the stopper (41), and the stopper (41) drives the lifting plate (42) to move upward, so that when the intercepting net (61) tilts, the baffle (69) is lifted at the same time, so that the rice enters the low-temperature chamber (4) from the discharge port (63); The material control mechanism (7) comprises a door panel (71) arranged on the inner wall of the killing chamber (3), a top spring (711) being arranged at the bottom of the door panel (71), two groups of springs (710) being arranged on the material storage bin (11), the springs (710) being located on one side of the door panel (71), a plate groove (72) being arranged at the top of the killing chamber (3), and the door panel (71) being slidably connected to the inside of the plate groove (72); Two vertical guide grooves (73) are arranged inside the door panel (71), the bottom of the guide grooves (73) is connected to a transverse groove (74), a stabilizing rod (76) is slidably mounted inside the door panel (71), a guide rod (75) is arranged on the stabilizing rod (76), and the guide rod (75) slides inside the guide grooves (73) and the transverse grooves (74); The end of the stabilizing rod (76) is rotatably connected to a movable block (78) via a rotating shaft (77), and a limiting block (79) for limiting the movable block (78) is provided at the bottom of the movable block (78): when the top block (68) moves upward, the top block (68) pushes the movable block (78) in the process of moving upward, and the movable block (78) flips: when the top block (68) moves downward, it pushes the movable block (78) to move downward synchronously, until the stabilizing rod (76) is separated by squeezing the top spring (711) through the movable block (78).

2. The device for rapidly killing rice weevils in rice according to claim 1, characterized in that The liquid nitrogen adding chamber (2) comprises an adding port (21) provided on a side wall of the killing chamber (3) for adding liquid nitrogen, the adding port (21) being connected to a liquid nitrogen tank (22), and the liquid nitrogen tank (22) being arranged at the bottom of the killing chamber (3).

3. The method for using the device for rapidly killing rice weevils in rice according to claim 1, characterized in that , specifically comprising the following steps: Step 1: transporting the packaged rice to the interior of the liquid nitrogen adding chamber (2) through the intercepting mechanism (6), immersing the packaged rice in the liquid nitrogen adding chamber (2) for 0.5-3.5 minutes, and performing low-temperature pretreatment at a treatment temperature of -147 to -209°C. After the treatment is completed, the rice is fished out through the intercepting mechanism (6); Step 2: The pretreated rice is transferred from the killing chamber (3) to the -20°C low-temperature chamber (4) through the interception mechanism (6) and kept for 12-80 minutes to kill the rice weevil adults and eggs in the rice: Step 3: After the rice is processed in the low-temperature chamber (4), the rice is sent out of the -20°C low-temperature chamber (4) and allowed to enter the discharge chamber (5) to slowly return to room temperature. During this period, moisture caused by the freezing process can also be eliminated. Finally, the rice is stored.

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