Carbon-nitrogen composite modified atmosphere insecticidal process for grain storage

Abstract

The invention belongs to the technical field of grain storage, and discloses a carbon-nitrogen composite modified atmosphere insecticidal process for grain storage, which comprises a bracket. Through cooperation of the mixing assembly, the shell and other structures, the output shaft of the motor drives the threaded conveying rod to rotate, grains and gas are conveyed to the top of the protective barrel through the threaded conveying rod, the falling radius of the grains is increased through the arc at the edge of the top of the protective barrel, and therefore the grains make better contact with the diffused gas, and the grain quality is improved. The contact time of grains and gas in the protective cylinder is prolonged, the grains completely penetrate through a filter plate and are uniformly sprayed to the top of a flow slowing plate, the grains are pushed to be a plane through a baffle, the gas adhered to the grains can be better diffused out, the baffle opens a retention assembly, the grains in contact with the gas are laid on the top layer of a grain pile, and the grain pile is more compact. The pest killing quality of the device is further improved, and meanwhile the killing time is shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of grain storage, and specifically relates to a carbon-nitrogen compound controlled atmosphere insecticidal process for grain storage. Background Art

[0002] The carbon-nitrogen compound controlled atmosphere insecticidal process is a green grain storage technology that combines the synergistic effects of carbon dioxide and nitrogen. By regulating the gas composition in the grain pile, it can achieve efficient insecticidal, mold inhibition, and delay the deterioration of grain quality. After being treated with a mixture of carbon dioxide and nitrogen, the grain can avoid pest damage and significantly extend its storage time.

[0003] However, in the existing technology, it usually uses a circulation fan to circulate the gas in the grain. During the gas circulation process, carbon dioxide and nitrogen are sequentially infused from the bottom of the stirring chamber. However, single stirring will reduce the time for the gas to contaminate all the grain, and some of the pests cannot be quickly contacted and killed by the compound gas. In the existing technology, the insecticidal process is generally directly used in the granary. However, since a large amount of grain needs to be stored in the granary for better process experiments, once there is a problem with the process experiment, most of the grain in the granary will be affected. And the existing technology does not have a suitable experimental device for experiments, which greatly increases the time for killing pests. Therefore, we provide a carbon-nitrogen compound controlled atmosphere insecticidal process for grain storage. Summary of the Invention

[0004] To solve the problems raised in the above background art, the present invention provides a carbon-nitrogen compound controlled atmosphere insecticidal process for grain storage, which solves the problems of reduced time for carbon dioxide and nitrogen to contaminate all the grain, excessive time consumption in the granary for new process experiments in the existing technology, large amount of grain consumed, and some pests not being able to be quickly contacted and killed.

[0005] To achieve the above object, the present invention provides the following technical solution: A carbon-nitrogen compound controlled atmosphere insecticidal process for grain storage, the specific steps are as follows;

[0006] S01. Transport the grain into the carbon-nitrogen compound controlled atmosphere insecticidal device for grain storage and seal it.

[0007] S02. Detect the airtightness of the carbon-nitrogen compound controlled atmosphere insecticidal device for grain storage.

[0008] S03. Inject nitrogen into the carbon-nitrogen compound controlled atmosphere insecticidal device for grain storage for 2 - 5 days, and keep the nitrogen concentration above 95%.

[0009] S04. Inject carbon dioxide, maintain the carbon dioxide concentration above 20%, and keep it for more than 15 days.

[0010] S05. Real-time detection of the concentration of various gases in the grain storage carbon-nitrogen composite gas conditioning insecticide device, and when the concentration changes abnormally, fill the corresponding amount of carbon dioxide or nitrogen inside to complete the insecticide work. After confirming the above work flow, record the experimental data and use it to calculate the appropriate grain tons, carbon dioxide and nitrogen filling amounts and filling order for the granary.

[0011] A carbon-nitrogen composite gas conditioning insecticide process for grain storage, the specific steps are as follows;

[0012] S01. The grain is transported to the grain storage carbon-nitrogen compound gas-controlled insecticide device, and any possible leaks in the grain storage carbon-nitrogen compound gas-controlled insecticide device are checked and repaired to ensure that the air tightness below the grain stacking line in the grain storage carbon-nitrogen compound gas-controlled insecticide device meets the requirements, that is, the air tightness half-life (minus 300Pa-minus 150Pa) is greater than 180s;

[0013] S02. Lay a gas detection tube in the device to check whether the sealing groove is loose or damaged, and whether there is a gap at the joint of the sealing groove. After the sealing is completed, use negative pressure to perform air tightness testing. During the testing process, pay attention to whether various process holes are leaking;

[0014] S03. Fill the upper layer of the grain pile with high-purity nitrogen by means of upper filling and lower exhaust. After 2-5 days of nitrogen filling operation, the nitrogen concentration in the grain pile reaches more than 95%, and the grain storage carbon-nitrogen composite gas conditioning insecticide device is in an oxygen-deficient state. Close the inflation valve, and use an external strong exhaust fan to extract the air with high oxygen content in the lower layer of the grain pile, so that the grain pile forms a negative pressure, and the air bag on the upper part of the grain pile disappears;

[0015] S04, close the exhaust valve under the grain pile, open the inflation valve on the grain pile, and use the carbon dioxide gasification device to fill the liquid carbon dioxide gas in the tank truck into the upper layer of the grain pile, that is, adopt the method of filling from top to bottom without exhausting, and fill the grain surface with a corresponding amount of carbon dioxide gas, so that the plastic film on the grain surface forms an air bag again;

[0016] The pests in the grain pile will eventually die due to the dual gas regulation of lack of oxygen and high carbon dioxide;

[0017] S05. After the carbon dioxide is filled, the concentration of various gases in various parts of the warehouse is checked regularly every day, and carbon dioxide or nitrogen is added in time. When negative pressure is formed, the corresponding volume of nitrogen or carbon dioxide is added in time. After the addition is completed, the grain pile is circulated in time to make the gas evenly distributed inside the grain pile. After more than 15 days, the carbon dioxide concentration is kept within the range of 20%-35%, and all pests in various parts of the warehouse die. Then open the air inlet valve and the air outlet valve on the circulation pipeline, release the gas conditioning state of the grain pile, and the grain enters the normal storage state.

[0018] Preferably, the carbon-nitrogen compound gas conditioning insecticidal device for grain storage used in S01 includes a bracket and also an external component;

[0019] The external component includes a housing. There are several brackets which are installed circumferentially and equiangularly on the outer periphery of the housing. A motor is installed on the top of the housing. An air extraction port for connecting an air compressor is provided on the top of the housing. A feeding component is installed on the outer periphery of the housing. A discharge pipe is installed at the bottom of the housing;

[0020] A mixing component arranged inside the housing;

[0021] The mixing component includes a protective cylinder fixedly installed inside the housing. The output shaft of the motor is in transmission connection with a threaded conveying rod located inside the protective cylinder. The outer periphery of the threaded conveying rod is in transmission connection through a limiting frame with a filter plate sleeved on the outer periphery of the protective cylinder. A plurality of baffles are installed circumferentially and equiangularly at the bottom of the filter plate. A flow retardation plate is fixedly installed on the outer periphery of the protective cylinder;

[0022] A retention component installed on the flow retardation plate. The baffle moves to contact and open the retention component and make the grain located at the lower end inside the housing;

[0023] A separation component installed circumferentially and equiangularly on the inner wall of the housing. The separation component is used to remove pests in the grain;

[0024] A pressurization component arranged at the bottom of the housing. The pressurization component is used to infuse nitrogen and carbon dioxide into the housing.

[0025] Preferably, the top of the protective cylinder is in a hollow umbrella shape. An arc-shaped notch for the entry of grain is provided at the bottom of the protective cylinder. The threaded conveying rod is rotatably installed at the bottom of the housing.

[0026] Preferably, a threaded groove is provided on the air extraction port. The external component further includes a carbon-nitrogen compound gas detector installed on the inner wall of the housing.

[0027] Preferably, the retention component includes a partition plate hinged to the bottom of the flow retardation plate. The middle part of the partition plate is elastically connected to the bottom of the flow retardation plate through a spring piece. A guiding plate is fixedly installed at the top of the partition plate.

[0028] Preferably, a first notch for placing the partition plate is provided at the bottom of the flow retardation plate. The top of the partition plate is made of rubber. The edge of the partition plate is inclined. The bottom of the baffle is in a hollow umbrella shape and contacts the inclined surface of the partition plate.

[0029] Preferably, the mixing component further includes an internal gear installed at the bottom of the filter plate. The separation component includes a protective box installed on the inner wall of the housing. A gear meshing with the internal gear is rotatably installed inside the protective box. A fan is drivingly connected to the bottom of the gear. A separation box is installed on the outer periphery of the protective cylinder. A second notch for pests to enter is formed on the side of the separation box. A curtain covering the second notch is installed on the side of the separation box.

[0030] Preferably, the opening of the protective box faces the second notch on the side of the separation box, and the curtain is made of pure cotton.

[0031] Preferably, the pressurizing component includes a pressurizing cylinder disposed inside the housing. The lower end of the screw conveyor rod is located inside the pressurizing cylinder. A reciprocating thread groove is provided on the outer periphery of the screw conveyor rod. A pressurizing plate sleeved on the reciprocating thread groove is vertically movable inside the pressurizing cylinder. The interior of the housing is connected to the lower end inside the pressurizing cylinder through an injection pipe. A filter cloth is provided at the top of the injection pipe. A one-way valve is installed inside the injection pipe. An injection groove for injecting carbon dioxide and nitrogen into the pressurizing cylinder is provided at each end inside the housing. An electromagnetic valve is provided inside each injection groove.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] Through the cooperation of structures such as the mixing component and the housing, the output shaft of the motor drives the screw conveyor rod to rotate. The grain and gas are conveyed by the screw conveyor rod to the top of the protective cylinder. The arc at the top edge of the protective cylinder increases the radius of the falling grain, so as to better contact the emitted gas. The contact time between the grain and the gas inside the protective cylinder is extended. The grain completely passes through the filter plate and is evenly sprinkled on the top of the slow-flow plate. Pushed into a plane by the baffle, the gas adhered to the grain can be better dispersed. The baffle opens the retention component, so that the grain in contact with the gas covers the top layer of the grain pile, further improving the quality of pest killing by the device and reducing the disinfection time at the same time.

[0034] Through the cooperation of structures such as the mixing component and the separation component, during the rotation of the filter plate, it drives the gear to rotate through the internal gear. The wind generated by the fan blows towards the second notch on the side of the separation box. After the baffle is opened, the falling path of the grain will pass through the direction of the wind, so that foreign objects in the grain are blown into the separation box, and the curtain can also adsorb the dust blown out by the wind. Further, it can prevent the dust from spreading inside the housing.

[0035] Through the cooperation of structures such as a pressurizing component and a mixing component, when the threaded conveying rod rotates, the reciprocating thread grooves thereon drive the pressure plate to rise. At this time, the one-way valve closes. However, it should be noted that the two air injection grooves are respectively connected to the gas storage devices of nitrogen and carbon dioxide, and the two solenoid valves will also separately control the intake amounts of nitrogen and carbon dioxide. Carbon dioxide or nitrogen can be injected separately according to actual process requirements, or the two gases can be injected simultaneously. When the solenoid valve controlling the flowing nitrogen is opened, the rising of the pressure plate will fill the lower end inside the pressure cylinder with nitrogen, thereby reducing the content of air below the pressure plate and also improving the purity of nitrogen. By pumping the gas, nitrogen or carbon dioxide is brought into contact with the grains, which can keep the gas always active inside the pressure cylinder and will not cause uneven concentration of nitrogen in the gas, thus reducing the efficiency of nitrogen in asphyxiating pests. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the external structure of the present invention;

[0037] Figure 2 is a schematic diagram of the internal structure of the external components of the present invention;

[0038] Figure 3 is a schematic diagram of the structural cooperation between the mixing component and the separation component of the present invention;

[0039] Figure 4 is an exploded schematic diagram of the structural cooperation and disassembly between the mixing component and the retention component of the present invention;

[0040] Figure 5 is a schematic diagram of the structural cooperation between the retention component and the separation component of the present invention;

[0041] Figure 6 is a schematic diagram of the structural cooperation between the separation component and the internal gear of the present invention;

[0042] Figure 7 is a schematic diagram of the internal structural cooperation of the pressurizing component of the present invention;

[0043] Figure 8 is an exploded schematic diagram of the structural disassembly between the pressurizing component and the external components of the present invention.

[0044] In the figure: 1. External component; 11. Housing; 12. Air extraction port; 13. Feeding component; 14. Carbon and nitrogen composite gas detector; 15. Discharge pipe; 2. Bracket; 3. Motor; 4. Mixing component; 41. Threaded conveying rod; 42. Limiting frame; 43. Filter plate; 44. Flow retarder plate; 45. Baffle; 46. Protection cylinder; 47. Internal gear; 5. Retention component; 51. Partition board; 52. Guide plate; 53. Spring piece; 6. Separation component; 61. Protection box; 62. Gear; 63. Fan; 64. Separation box; 65. Curtain; 7. Pressurization component; 71. Pressurization cylinder; 72. Pressurization plate; 73. Gas injection groove; 74. Solenoid valve; 75. Gas injection pipe; 76. Check valve; 77. Reciprocating thread groove; 78. Filter cloth; 98. Carbon dioxide; 89. Nitrogen. Detailed implementation mode

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0046] As Figures 1 to 8 shown, the present invention provides a carbon and nitrogen compound gas conditioning and insecticidal process for grain storage, and the specific steps are as follows;

[0047] S01. Transport the grain into the carbon and nitrogen compound gas conditioning and insecticidal device for grain storage, and perform a sealing treatment on it;

[0048] S02. Detect the airtightness of the carbon and nitrogen compound gas conditioning and insecticidal device for grain storage;

[0049] S03. Inject nitrogen into the carbon and nitrogen compound gas conditioning and insecticidal device for grain storage for 2 - 5 days, and keep the nitrogen concentration above 95%;

[0050] S04. Inject carbon dioxide, and maintain the carbon dioxide concentration above 20% and keep it for more than 15 days;

[0051] S05. Real-time detect the concentration of various gases in the carbon and nitrogen compound gas conditioning and insecticidal device for grain storage, and when the concentration shows abnormal changes, fill the corresponding amount of carbon dioxide or nitrogen into it to complete the insecticidal work. After confirming the above work process, record the experimental data, and calculate the appropriate amount of grain in tons, the amount of carbon dioxide and nitrogen filled, and the filling sequence suitable for the granary based on this.

[0052] A carbon and nitrogen compound gas conditioning and insecticidal process for grain storage, and the specific steps are as follows;

[0053] S01. The grain is transported to the grain storage carbon-nitrogen compound gas-controlled insecticide device, and any possible leaks in the grain storage carbon-nitrogen compound gas-controlled insecticide device are checked and repaired to ensure that the air tightness below the grain stacking line in the grain storage carbon-nitrogen compound gas-controlled insecticide device meets the requirements, that is, the air tightness half-life (minus 300Pa-minus 150Pa) is greater than 180s;

[0054] S02. Lay a gas detection tube in the device to check whether the sealing groove is loose or damaged, and whether there is a gap at the joint of the sealing groove. After the sealing is completed, use negative pressure to perform air tightness testing. During the testing process, pay attention to whether various process holes are leaking;

[0055] S03. Fill the upper layer of the grain pile with high-purity nitrogen by means of upper filling and lower exhaust. After 2-5 days of nitrogen filling operation, the nitrogen concentration in the grain pile reaches more than 95%, and the grain storage carbon-nitrogen composite gas conditioning insecticide device is in an oxygen-deficient state. Close the inflation valve, and use an external strong exhaust fan to extract the air with high oxygen content in the lower layer of the grain pile, so that the grain pile forms a negative pressure, and the air bag on the upper part of the grain pile disappears;

[0056] S04, close the exhaust valve under the grain pile, open the inflation valve on the grain pile, and use the carbon dioxide gasification device to fill the liquid carbon dioxide gas in the tank truck into the upper layer of the grain pile, that is, adopt the method of filling from top to bottom without exhausting, and fill the grain surface with a corresponding amount of carbon dioxide gas, so that the plastic film on the grain surface forms an air bag again;

[0057] The pests in the grain pile will eventually die due to the dual gas regulation of lack of oxygen and high carbon dioxide;

[0058] S05. After the carbon dioxide is filled, the concentration of various gases in various parts of the warehouse is checked regularly every day, and carbon dioxide or nitrogen is added in time. When negative pressure is formed, the corresponding volume of nitrogen or carbon dioxide is added in time. After the addition is completed, the grain pile is circulated in time to make the gas evenly distributed inside the grain pile. After more than 15 days, the carbon dioxide concentration is kept within the range of 20%-35%, and all pests in various parts of the warehouse die. Then open the air inlet valve and the air outlet valve on the circulation pipeline, release the gas conditioning state of the grain pile, and the grain enters the normal storage state.

[0059] The grain storage carbon-nitrogen composite atmosphere controlled insecticide device used in S01 includes a bracket 2 and an external component 1;

[0060] The external component 1 includes a shell 11, a plurality of brackets 2 are installed at equal angles around the outer periphery of the shell 11, a motor 3 is installed on the top of the shell 11, an air extraction port 12 for connecting to an air compressor is provided on the top of the shell 11, a feed assembly 13 is installed on the outer periphery of the shell 11, and a discharge pipe 15 is installed at the bottom of the shell 11;

[0061] A mixing assembly 4 disposed inside the housing 11;

[0062] The mixing component 4 includes a protective cylinder 46 fixedly installed inside the housing 11. The output shaft of the motor 3 is drivingly connected to a threaded conveying rod 41 located inside the protective cylinder 46. The outer periphery of the threaded conveying rod 41 is drivingly connected through a limiting frame 42 to a filter plate 43 sleeved on the outer periphery of the protective cylinder 46. A plurality of baffles 45 are circumferentially and equiangularly installed at the bottom of the filter plate 43. A flow retarder plate 44 is fixedly installed on the outer periphery of the protective cylinder 46;

[0063] The retention component 5 installed on the flow retarder plate 44 is moved and abutted by the baffle 45 to be opened, and the grains are located at the lower end inside the housing 11;

[0064] The separation component 6 is circumferentially and equiangularly installed on the inner wall of the housing 11, and the separation component 6 is used to remove pests in the grains;

[0065] The pressurization component 7 is arranged at the bottom of the housing 11, and the pressurization component 7 is used to infuse nitrogen and carbon dioxide into the inside of the housing 11.

[0066] The top of the protective cylinder 46 is in the shape of a hollow umbrella top. The bottom of the protective cylinder 46 is provided with an arc-shaped notch for the grains to enter. The threaded conveying rod 41 is rotatably installed at the bottom of the housing 11.

[0067] The air extraction port 12 is provided with a threaded groove. The external component 1 further includes a carbon-nitrogen composite gas detector 14 installed on the inner wall of the housing 11.

[0068] Adopting the above scheme: Open the feeding component 13, pour grains into the inside of the housing 11 through it, and then seal the inside of the housing 11 through it. Connect the air extraction port 12 to an air compressor, and perform a vacuum pumping operation on the inside of the housing 11 to ensure the purity of the gas inside the housing 11;

[0069] Start the pressurization component 7 to sequentially infuse nitrogen and carbon dioxide into the lower end inside the housing 11;

[0070] Drive the threaded conveying rod 41 to rotate through the output shaft of the motor 3. Since the protective cylinder 46 in a fixed state is arranged outside the threaded conveying rod 41, at this time, the grains at the lower end inside the housing 11 will contact the threaded conveying rod 41 through the notch at the bottom of the protective cylinder 46. Through the rotation of the threaded conveying rod 41, the grains and the gas will be conveyed by the threaded conveying rod 41 to the top of the protective cylinder 46. And through the arc-shaped design at the top edge of the protective cylinder 46, the radius of the grains falling will increase, so as to better contact the gas. The carbon-nitrogen composite gas detector 14 will detect the concentration of nitrogen or carbon dioxide and transmit the data to the computer terminal in a timely manner. When the gas does not meet the standard, it can timely remind the technicians;

[0071] The threaded conveying rod 41 drives the filter plate 43 to rotate through the limit frame 42, and the holes on the filter plate 43 can allow the grain to completely pass through the filter plate 43 and be located at the bottom of the slow flow plate 44. Furthermore, since the filter plate 43 is in a rotating state, the grain will be evenly sprinkled on the top of the slow flow plate 44 and pushed into a plane by the baffle 45, so that the gas adhering to the grain can be better dispersed. Furthermore, when the baffle 45 is driven to rotate by the filter plate 43, it will also push and start the retention component 5;

[0072] The grains contacting the gas are spread on the top layer of the grain pile. When the grains at the lower end of the shell 11 are extracted by the threaded conveying rod 41, the time they are in contact with the gas inside the protective tube 46 is prolonged. The gas in the grains is completely volatilized after being screened by the filter plate 43 and the retention component 5. The grains contacting the gas are relocated to the top layer of the grain pile, which further improves the quality of killing pests by the device and reduces the disinfecting time.

[0073] Finally, the grain is completely discharged through the discharge pipe 15.

[0074] like Figures 1 - 5 As shown, the retention assembly 5 includes a partition 51 hinged to the bottom of the slow flow plate 44 , the middle of the partition 51 is elastically connected to the bottom of the slow flow plate 44 through a spring sheet 53 , and a guide plate 52 is fixed to the top of the partition 51 .

[0075] The bottom of the slow flow plate 44 is provided with a first notch for placing the partition 51 . The top of the partition 51 is made of rubber. The edge of the partition 51 is inclined. The bottom of the baffle 45 is in a hollow umbrella-like shape and contacts the inclined surface of the partition 51 .

[0076] The above scheme is adopted: the filter plate 43 drives the baffle 45 to rotate, and the arc edge at the bottom of the baffle 45 contacts the inclined surface of the guide plate 52, so that it pushes the partition 51 to turn down through the guide plate 52, and the grain on the slow flow plate 44 can fall intermittently and cover the grain pile. When the baffle 45 is not in contact with the guide plate 52, the spring sheet 53 pushes the partition 51 to return to its original position, and the grain can always be located on the top of the slow flow plate 44 and flattened by the baffle 45, so as to better contact with nitrogen and carbon dioxide.

[0077] like Figures 1 - 6 As shown, the mixing assembly 4 also includes an internal gear 47 installed at the bottom of the filter plate 43, and the separation assembly 6 includes a protective box 61 installed on the inner wall of the shell 11. The internal part of the protective box 61 is rotatably installed with a gear 62 meshing with the internal gear 47, and the bottom of the gear 62 is transmission-connected to a fan 63. A separation box 64 is installed on the outer periphery of the protective tube 46, and a second slot for the entry of pests is opened on the side of the separation box 64, and a curtain 65 covering the second slot is installed on the side of the separation box 64.

[0078] The opening of the protective box 61 faces the second notch on the side of the separation box 64, and the curtain 65 is made of pure cotton.

[0079] With the above solution: during the rotation of the filter plate 43, it drives the gear 62 to rotate through the internal gear 47, and the wind generated by the fan 63 blows towards the second notch on the side of the separation box 64. After the partition plate 51 is opened, the falling path of the grains will pass through the direction of the wind, so that the dry straws, foreign objects and other impurities in the grains are blown into the interior of the separation box 64, and the curtain 65 can also adsorb the dust blown out by the wind. Further, it can prevent the dust from spreading inside the housing 11;

[0080] It should be noted that before the grains are experimented, they are generally dried completely. The proportion of foreign objects in them is very small. When the drying time of the grains acts on the foreign objects, the foreign objects can be drier than the grains, and then the weight of the foreign objects is much lower than that of the grains. At this time, the wind generated by the fan 63 will blow the foreign objects away from the grains.

[0081] As Figures 2 - 8 shown, the pressurizing assembly 7 includes a pressurizing cylinder 71 arranged inside the housing 11. The lower end of the screw conveyor rod 41 is located inside the pressurizing cylinder 71. A reciprocating thread groove 77 is arranged on the outer periphery of the screw conveyor rod 41. A pressurizing plate 72 sleeved on the reciprocating thread groove 77 is vertically movable inside the pressurizing cylinder 71. The inside of the housing 11 is connected to the lower end inside the pressurizing cylinder 71 through an injection pipe 75. A filter cloth 78 is arranged at the top of the injection pipe 75. A one-way valve 76 is installed inside the injection pipe 75. An injection groove 73 for injecting carbon dioxide and nitrogen into the pressurizing cylinder 71 is arranged at each end inside the housing 11, and a solenoid valve 74 is arranged inside each injection groove 73.

[0082] With the above solution: when the screw conveyor rod 41 rotates, the reciprocating thread groove 77 on it drives the pressurizing plate 72 to rise. At this time, the one-way valve 76 is closed. It should be noted that the two injection grooves 73 are respectively connected to the storage devices of nitrogen and carbon dioxide, and the two solenoid valves 74 will also separately control the intake amounts of nitrogen and carbon dioxide. The solenoid valve 74 controlling the flow of nitrogen can be opened, and carbon dioxide or nitrogen can be injected separately according to the actual process requirements, or the two gases can be injected simultaneously;

[0083] When the reciprocating thread groove 77 is at the position in Figure 7 , the rising of the pressurizing plate 72 will make the lower end inside the pressurizing cylinder 71 filled with nitrogen, thereby reducing the content of air below the pressurizing plate 72. Further, the purity of nitrogen is also improved;

[0084] By pumping gas, nitrogen or carbon dioxide is brought into contact with the grains, which enables the gas to remain active inside the pressure cylinder. Further, it will not cause uneven concentration of nitrogen in the gas, thus reducing the efficiency of nitrogen in asphyxiating pests.

[0085] When the pressure plate 72 descends, the one-way valve 76 opens and the solenoid valve 74 closes, allowing the gas to enter the interior of the protective cylinder 46 through the injection pipe 75, thereby further improving the efficiency of the gas in killing pests.

[0086] While the filter cloth 78 allows the gas to pass through, the grains will not enter the injection pipe 75, thus eliminating the time for subsequent cleaning and maintenance.

[0087] The working principle and usage process of the present invention:

[0088] Open the feeding assembly 13, pour grains into the interior of the housing 11 through it, and then seal the interior of the housing 11 through it. Connect the air extraction port 12 to the air compressor and perform a vacuum pumping operation on the interior of the housing 11.

[0089] When the threaded conveying rod 41 rotates, the reciprocating thread groove 77 thereon drives the pressure plate 72 to rise. At this time, the one-way valve 76 closes. However, it should be noted that the two gas injection grooves 73 are respectively connected to the nitrogen and carbon dioxide storage devices, and the two solenoid valves 74 will also separately control the intake of nitrogen and carbon dioxide, and the solenoid valve 74 controlling the flow of nitrogen is opened.

[0090] The grains at the lower end inside the housing 11 will contact the threaded conveying rod 41 through the notch at the bottom of the protective cylinder 46. The threaded conveying rod 41 rotates to convey the grains and the gas to the top of the protective cylinder 46. The carbon-nitrogen composite gas detector 14 will detect the concentration of the gas and transmit the data to the computer terminal in a timely manner. When the composite gas formed by the gas does not meet the standard, it can timely remind the technicians.

[0091] The threaded conveying rod 41 drives the filter plate 43 to rotate through the limit frame 42, and the grains will be evenly sprinkled on the top of the slow-flow plate 44 and pushed into a flat surface by the baffle 45.

[0092] The arc edge at the bottom of the baffle 45 contacts the inclined surface of the guide plate 52, thereby pushing the partition plate 51 to turn down through the guide plate 52. The grains on the slow-flow plate 44 can intermittently fall and cover the grain pile. When the baffle 45 does not contact the guide plate 52, the spring piece 53 pushes the partition plate 51 back to its original position.

[0093] During the rotation of the filter plate 43, it drives the gear 62 to rotate through the internal gear 47. The wind generated by the fan 63 blows towards the second notch on the side of the separation box 64. After the partition plate 51 is opened, the falling path of the grains will pass through the direction of the wind, so that the foreign matters that may be contained in the grains are blown into the interior of the separation box 64.

[0094] Finally, the grains are completely discharged through the discharge pipe 15.

[0095] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0096] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A carbon-nitrogen compound controlled atmosphere insecticidal process for grain storage, characterized in that, The specific steps are as follows; S01, transporting the grain to the grain storage carbon-nitrogen composite gas-controlled insecticide device and sealing it; S02. Detect the air tightness of the grain storage carbon-nitrogen composite atmosphere pest control device; S03, injecting nitrogen into the grain storage carbon-nitrogen composite gas conditioning insecticide device for 2-5 days, and maintaining the nitrogen concentration above 95%; S04, injecting carbon dioxide, maintaining the carbon dioxide concentration above 20% for more than 15 days; S05. Real-time detection of the concentration of various gases in the grain storage carbon-nitrogen composite gas conditioning insecticide device, and when the concentration changes abnormally, fill the corresponding amount of carbon dioxide or nitrogen inside to complete the insecticide work. After confirming the above work flow, record the experimental data and use it to calculate the appropriate grain tons, carbon dioxide and nitrogen filling amounts and filling order for the granary.

2. The carbon-nitrogen compound gas conditioning insecticidal process for grain storage according to claim 1, characterized in that, The specific steps are as follows; S01. The grain is transported to the grain storage carbon-nitrogen compound gas-controlled insecticide device, and any possible leaks in the grain storage carbon-nitrogen compound gas-controlled insecticide device are checked and repaired to ensure that the air tightness below the grain stacking line in the grain storage carbon-nitrogen compound gas-controlled insecticide device meets the requirements, that is, the air tightness half-life (minus 300Pa-minus 150Pa) is greater than 180s; S02. Lay a gas detection tube in the device to check whether the various sealing grooves are loose or damaged, and whether there are gaps at the joints of the sealing grooves. After the sealing is completed, use negative pressure to perform air tightness testing. During the testing process, pay attention to whether various process holes are leaking; S03, filling the upper layer of the grain pile with high-purity nitrogen by upper filling and lower exhausting. After 2-5 days of nitrogen filling operation, the nitrogen concentration in the grain pile reaches more than 95%, and the grain storage carbon-nitrogen composite gas conditioning insecticide device is in an oxygen-deficient state. The filling valve is closed, and the air with high oxygen content in the lower layer of the grain pile is extracted by an external strong exhaust fan, so that the grain pile forms a negative pressure; S04, close the exhaust valve under the grain pile, open the inflation valve on the grain pile, and fill a corresponding amount of carbon dioxide gas into the upper layer of the grain pile; The pests in the grain pile will eventually die due to the dual gas regulation of lack of oxygen and high carbon dioxide; S05. After the carbon dioxide is filled, the concentration of various gases in various parts of the warehouse is checked regularly every day, and carbon dioxide or nitrogen is added in time. When negative pressure is formed, the corresponding volume of nitrogen or carbon dioxide is added in time. After the addition is completed, the gas is circulated in time to make the gas inside the grain pile evenly distributed. After more than 15 days, the carbon dioxide concentration is kept within the range of 20%-35%, and all pests in various parts of the warehouse die. Then open the air inlet valve and the air outlet valve to release the gas conditioning state of the grain pile, and the grain enters the normal storage state.

3. The carbon-nitrogen compound modified atmosphere insecticidal process for grain storage according to claim 2, characterized in that ； The grain storage carbon-nitrogen composite atmosphere controlled insecticide device used in S01 comprises a bracket (2) and an external component (1); The external component (1) includes a housing (11). A number of the brackets (2) are installed circumferentially and equiangularly on the outer periphery of the housing (11). A motor (3) is installed on the top of the housing (11). An air extraction port (12) for connecting an air compressor is provided on the top of the housing (11). A feeding component (13) is installed on the outer periphery of the housing (11). A discharge pipe (15) is installed at the bottom of the housing (11). A mixing component (4) disposed inside the housing (11); The mixing component (4) includes a protective cylinder (46) fixedly installed inside the housing (11). The output shaft of the motor (3) is drivingly connected to a threaded conveying rod (41) located inside the protective cylinder (46). The outer periphery of the threaded conveying rod (41) is drivingly connected through a limiting frame (42) to a filter plate (43) sleeved on the outer periphery of the protective cylinder (46). A number of baffles (45) are installed circumferentially and equiangularly at the bottom of the filter plate (43). A flow retarder plate (44) is fixedly installed on the outer periphery of the protective cylinder (46); A retention component (5) installed on the flow retarder plate (44). The baffle (45) moves and abuts against the retention component (5) to open and place the grains at the lower end inside the housing (11); A separation component (6) installed circumferentially and equiangularly on the inner wall of the housing (11). The separation component (6) is used to remove pests from the grains; A pressurizing component (7) disposed at the bottom of the housing (11). The pressurizing component (7) is used to infuse nitrogen and carbon dioxide into the housing (11).

4. The carbon-nitrogen compound gas conditioning insecticidal process for grain storage according to claim 3, characterized in that: The top of the protective cylinder (46) is in a hollow umbrella top shape. An arc-shaped notch for the entry of grains is provided at the bottom of the protective cylinder (46). The threaded conveying rod (41) is rotatably installed at the bottom of the housing (11).

5. The carbon-nitrogen compound controlled atmosphere insecticidal process for grain storage according to claim 4, wherein: A threaded groove is provided on the air extraction port (12). The external component (1) further includes a carbon-nitrogen composite gas detector (14) installed on the inner wall of the housing (11).

6. The carbon-nitrogen compound gas conditioning insecticidal process for grain storage according to claim 5, characterized in that: The retention component (5) includes a partition plate (51) hinged to the bottom of the flow retarder plate (44). The middle of the partition plate (51) is elastically connected to the bottom of the flow retarder plate (44) through a spring plate (53). A guiding plate (52) is fixedly installed at the top of the partition plate (51).

7. The carbon-nitrogen compound controlled atmosphere insecticidal process for grain storage according to claim 6, characterized in that: A first notch for placing the partition plate (51) is provided at the bottom of the flow retarder plate (44). The top of the partition plate (51) is made of rubber. The edge of the partition plate (51) is inclined. The bottom of the baffle (45) is in a hollow umbrella top shape and contacts the inclined surface of the partition plate (51).

8. The carbon-nitrogen compound gas conditioning insecticidal process for grain storage according to claim 7, characterized in that: The mixing component (4) further includes an internal gear (47) installed at the bottom of the filter plate (43). The separation component (6) includes a protective box (61) installed on the inner wall of the housing (11). A gear (62) meshing with the internal gear (47) is rotatably installed inside the protective box (61). A fan (63) is drivingly connected to the bottom of the gear (62). A separation box (64) is installed on the outer periphery of the protective cylinder (46). A second notch for the entry of pests is provided on the side of the separation box (64). A curtain (65) covering the second notch is installed on the side of the separation box (64).

9. The carbon-nitrogen compound controlled atmosphere insecticidal process for grain storage according to claim 8, wherein: The opening of the protective box (61) faces the second notch on the side of the separation box (64), and the curtain (65) is made of pure cotton.

10. The carbon-nitrogen compound gas conditioning insecticidal process for grain storage according to claim 9, characterized in that: The pressurizing assembly (7) includes a pressurizing cylinder (71) disposed inside the housing (11). The lower end of the threaded conveying rod (41) is located inside the pressurizing cylinder (71). A reciprocating thread groove (77) is provided on the outer periphery of the threaded conveying rod (41). A pressurizing plate (72) sleeved on the reciprocating thread groove (77) is vertically movable inside the pressurizing cylinder (71). The inside of the housing (11) is connected to the lower end inside the pressurizing cylinder (71) through an air injection pipe (75). A filter cloth (78) is provided at the top of the air injection pipe (75). A one-way valve (76) is installed inside the air injection pipe (75). An air injection groove (73) for injecting carbon dioxide and nitrogen into the pressurizing cylinder (71) is provided at each end inside the housing (11), and an electromagnetic valve (74) is provided inside each air injection groove (73).

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