Phosphine gas generation system

Abstract

The utility model discloses a phosphine gas generating system. According to the technical scheme, the device comprises a material storage module, a material distribution module, a generation module, a processing module, a measurement and control module and a rack box body. According to the scheme provided by the utility model, the stored grain fumigation insect killing can be more effectively realized, the safety risk of dosing by personnel is completely avoided, the labor intensity is reduced, the workload is reduced, and the medicine can be stored for a long time as long as being placed in the bin once and can be released for multiple times according to the fumigation requirement; the generation opportunity and the dosage of the phosphine can be selected timely and reasonably, and the drug release concentration can be regulated and controlled according to actual conditions, so that the effective optimal CT value of the pest lethal concentration is achieved, and the dosage is reduced to the greatest extent; fumigating residues are subjected to innocent treatment, and residual gas is sent back to a grain pile, so that zero emission of poison gas is realized, the pesticide effect is fully utilized, and the environmental pollution is reduced; the whole fumigation operation and the circulation process are all carried out under the inner film of the granary pile, so that poison gas leakage is avoided, and grains are better protected.

Description

Technical Field

[0001] This utility model relates to the field of fumigation and pest control technology for agricultural products such as grains, and in particular to a phosphine gas generating system. Background Technology

[0002] Currently, the phosphine gas commonly used for fumigating and killing insects in grains is generated by reacting water with powder containing 85% aluminum phosphide or tablets containing 56% aluminum phosphide. There are various methods for applying phosphine fumigation to medium and large-sized grain reserves in my country, but they generally fall into two categories: external application and internal application.

[0003] External application of pesticides: This means that during the application of pesticides, the personnel do not need to enter the grain storage warehouse or a closed environment. Instead, they simply load the pesticides into the generator outside the warehouse and send the toxic gas into the grain pile through a circulating fan, thereby completing the pesticide fumigation operation. Early phosphine generators were devices that produced a 2:98 mixture of phosphine and carbon dioxide, or used cylinders containing a mixture of both for fumigation outside the grain silo. These were impractical and have been phased out. Currently, patent applications 200410010343.2 disclose an external phosphine generator for grain silos; 201110128634.1 discloses a phosphine generator; 202222752230.6 discloses a semi-automatic phosphine gas generator; 201120158453.9 discloses a phosphine generator; CN206735804U discloses a visual phosphine generator; CN212065563U discloses a uniform and efficient grain silo fumigation device; and CN107568192A discloses an intelligent dynamic deliquescent phosphine generator. These generators still primarily produce toxic gas in a single, concentrated manner and deliver it to the grain pile.

[0004] The advantages of implementing fumigation outside the warehouse are: 1. Although the concentration of phosphine is very high, it can be controlled; 2. The residue can be centrally treated in one go; 3. Phosphine gas can be directly incorporated into the circulation pipeline to achieve unidirectional circulation throughout the warehouse or pile.

[0005] While fumigation can be implemented outside the warehouse, the following shortcomings remain: 1. Fumigation outside the warehouse involves a single, concentrated application of pesticides. The initial pH concentration during fumigation is very high, which can easily cause pests to feign death. This is not the optimal pesticide effect, i.e., the effective CT value for pest mortality. 2. Fumigation operations are relatively long, lasting 8-10 hours per session. Personnel are required to be on duty throughout the process, and carbon dioxide cylinders are prone to blockage, leading to accidents. 3. Fumigation outside the warehouse is not suitable for long-term storage or repeated application of pesticides, as it can only kill single-stage stored grain pests. 4. There is always some leakage of phosphine gas from fumigation outside the warehouse, causing environmental pollution. 5. The residue after fumigation still needs to be treated again, and the residual toxic gas is not recycled but directly emitted into the environment, causing harmful pollution.

[0006] In-warehouse application: This refers to fumigation application operations that require personnel to enter the grain storage warehouse or a closed environment to complete the application. This technology is currently widely used and includes methods such as placing the pesticide on the grain surface in containers, applying the pesticide in small bags on the grain pile, layering the pesticide with probes, and slow-release application.

[0007] The advantages of implementing fumigation in warehouses are: 1. Less toxic gas leakage and less environmental pollution; 2. No need for long-term personnel to be on duty during fumigation, and the warehouse can be sealed after the fumigation is completed; 3. The fumigation of grain surface in the warehouse can also achieve unidirectional circulation of the whole warehouse.

[0008] While fumigation of grain storage facilities can be implemented, the following shortcomings remain: 1. Multiple people are required to enter the storage facility to apply the pesticide; 2. Multiple people are required to clean up the residue; 3. The concentration of the pesticide is uncontrollable and depends solely on the humidity of the grain pile within the storage facility; 4. The residue still needs to be processed again, and residual toxic gases are directly released into the environment; 5. The entire grain storage area cannot be sealed; 6. The fumigation operation is labor-intensive; 7. Personnel directly exposed to toxic gases must wear respirators, resulting in low safety; 8. The unit dosage is large, yet it may not achieve the effective insecticidal CT value; 9. Precise fumigation and insecticidal control cannot be achieved within the effective storage period; 10. Fumigation interferes with normal grain storage inspections and makes it difficult to achieve complete sealing of the grain storage facility for optimal grain protection; during whole-warehouse fumigation, air conditioning and other temperature control measures cannot be used in summer, causing grain temperature to rise, which is detrimental to grain preservation, etc.

[0009] In summary, current methods of centralized fumigation, whether used outside or inside warehouses, are not only time-consuming, labor-intensive, and costly in terms of pesticides and chemicals, but also pose numerous safety risks, such as environmental pollution caused by improper treatment of residues and exhaust gases, or toxic gas leaks. Therefore, they cannot achieve zero pollution and zero emissions. Furthermore, the actual needs for fumigating and controlling pests in grains and other agricultural products do not require excessively high concentrations of pesticides to increase CT values. Instead, the desired approach is to achieve effective pest control or mold suppression while extending the sealing time as much as possible. Utility Model Content

[0010] To address the shortcomings of existing technologies, the main objective of this invention is to provide a phosphine gas generating system that can more effectively achieve fumigation and pest control in stored grain. It eliminates the need for multiple point-to-point application of pesticides within the storage facility and the need for continuous personnel monitoring. A single application of pesticide in the storage facility allows for long-term retention, and the system can release the pesticide multiple times as needed, completely avoiding the safety risks associated with manual application, reducing labor intensity and workload. The timing and dosage of phosphine generation can be rationally selected, and the release concentration can be automatically adjusted to achieve the optimal CT value for effective pest lethality, minimizing pesticide usage. Fumigation residue is treated to render it harmless, and residual gas is returned to the grain pile, achieving zero emissions of toxic gas, maximizing pesticide efficacy, and reducing environmental pollution. The entire fumigation operation and circulation process are conducted under the inner membrane of the grain storage pile, completely preventing toxic gas leakage. This technology is more conducive to the daily management of grain storage facilities, including sealing and temperature control, making it convenient, practical, economical, effective, safe, and reliable, thus better protecting national food security.

[0011] To achieve the above objectives, this utility model provides the following technical solution: a phosphine gas generating system, comprising:

[0012] A material storage module includes a material storage mechanism, a material dispensing mechanism, and a material dropping mechanism. The material storage mechanism includes a material storage tank and a material storage cover connected to the tank by several live bolts. The center of the material storage cover is equipped with a guide pipe perpendicularly upward at a 30-45 degree angle to the cover surface. The material dispensing mechanism includes a mixing cylinder located on the back of the material storage tank and a mixer located inside the material storage tank and connected to the mixing cylinder. A material dropping port is provided inside the material storage tank. The mixer opens or closes the material dropping port under the action of the mixing cylinder. The material dropping mechanism includes a material dropping pipe connected to the material dropping port, a pre-reserved pipe connected to the material dropping pipe, and a flipping device capable of closing or opening the bottom opening of the material dropping pipe. The material dropping pipe is perpendicularly downward at a 30-45 degree angle to the bottom surface of the material storage tank.

[0013] A material distribution module includes a pushing mechanism, a storage and distribution mechanism, a primary sorting and distribution mechanism, and a secondary sorting and distribution mechanism. The pushing mechanism receives material from the dropping mechanism and distributes it evenly into 2n valve chambers, each with an equal volume. The storage and distribution mechanism opens or closes the valve chambers; when the valve chambers are open, the material in the 2n chambers enters the primary sorting and distribution mechanism; when the valve chambers are closed, the material is stored within the valve chambers. The primary sorting and distribution mechanism receives the material from the 2n chambers and divides it into 4n portions before it enters the secondary sorting and distribution mechanism. The secondary sorting and distribution mechanism divides the 4n portions received from the primary sorting and distribution mechanism into 8n portions.

[0014] A generating module includes multiple phosphine generating chambers, which are fixed together by a top fixing plate and a bottom fixing plate. Each phosphine generating chamber includes a supporting keel mechanism. Inside the keel mechanism, there is a generating mechanism for generating phosphine gas, a material closing mechanism for preventing powder from falling, and a powder collecting mechanism for collecting powder. Outside the keel mechanism, there is also a dustproof mechanism for sealing the phosphine generating chamber.

[0015] A processing module includes an air compression mechanism, a vacuum material suction mechanism, an aluminum phosphide residue generator, a fan circulation device, and a control center. The air compression mechanism includes an air compressor and a high-pressure air supply pipe connected to the air compressor. The vacuum material suction mechanism includes a first vacuum conveyor and a second vacuum conveyor connected in parallel, connected by a high-pressure air supply pipe and a high-pressure gas supply pipe. The first vacuum conveyor has a first inlet valve and a first outlet valve on each side, and the second vacuum conveyor has a second inlet valve and a second outlet valve on each side. The second vacuum conveyor is connected to… The device includes a powder collection box for receiving residual powder, and a feed valve is provided between the powder collection box and the second vacuum conveyor; the aluminum phosphide residue generating device includes a primary reaction tank and a secondary reaction tank connected in series, the primary reaction tank is connected to a high-pressure gas pipeline, and the primary reaction tank and the secondary reaction tank are connected through a guide pipe; the fan circulation device includes a circulation fan connected to the secondary reaction tank, and the circulation fan is connected to the circulation duct system of the grain pile through a positive pressure end air inlet pipe and a return pipe; the control center is electrically connected to the air compressor, the first vacuum conveyor, the second vacuum conveyor, the primary reaction tank, the secondary reaction tank, and all valves;

[0016] A measurement and control module includes a detection mechanism, an analysis and control center, a joint control center, an execution mechanism, and an operation and display device. The detection mechanism includes a pH3 concentration detector and a temperature and humidity detector installed inside the grain pile and in the pipeline. The data collected by the detection mechanism is analyzed by the analysis and control center and then executed by the execution mechanism. The execution mechanism includes solenoid valves that control each cylinder. The joint control center is equipped with a joint control chip controller, which communicates control information with the operation and display device and is connected to the control center of the processing module.

[0017] A frame housing, comprising an inner fixed bracket, an outer housing, a cable tray, and housing fixing clips; the inner fixed bracket is used to install and fix the storage tank and turning mechanism of the storage module, the primary turning and turning mechanism and the secondary turning and turning mechanism of the dispensing module, and each phosphine generation chamber of the generation module; the outer housing surrounds the storage module, the dispensing module, and the generation module into one unit, and has two air inlets and two air outlets on each side of the bottom.

[0018] Preferably, the flipping device includes a valve housing, a valve core, a valve shaft, a valve plate, a front bushing, a rear bushing, a drive arm, a movable connector, a flipping cylinder, and a counterweight device. The lower end of the valve core is tightly fitted inside the upper end of the valve housing. Bushing mounting holes are opened on both sides of the left side of the valve housing. The valve shaft has a groove, and the valve plate is installed in the middle. Both ends pass through the front bushing and the rear bushing and are prevented from axial movement by "O"-ring snap pins. The other end of the valve shaft is connected to the drive arm and connected to the movable connector. The movable connector is directly connected to one end of the flipping cylinder to perform a push-pull action. The other end of the flipping cylinder is fixedly connected to the frame housing. After the reserved tube is filled with medicine, the flipping cylinder drives the drive arm connected to the valve shaft to move, and the valve plate mounted on the valve shaft performs a flipping action.

[0019] Preferably, the pushing module includes a material distribution trough, a screw assembly disposed within the material distribution trough, and a ratchet assembly for driving the screw assembly to rotate. The screw assembly includes a central shaft and a left screw and a right screw sleeved on the central shaft. The threads on the left screw and the right screw are arranged in opposite directions. The material distribution trough is provided with n valve chambers at the left screw and the right screw, respectively. A left baffle plate and a right baffle plate are respectively provided at the end of the material distribution trough on the central shaft. The two ends of the central shaft are supported by a left shaft seat and a right shaft seat, respectively.

[0020] Preferably, the ratchet assemblies are located at both ends of the central shaft. Each ratchet assembly includes a ratchet wheel, a ratchet bar, a pawl, and a stop pin. The ratchet wheel is fixed on the central shaft, and the stop pin contacts the ratchet wheel and is located on the stop pin fixing plate. One end of the ratchet bar is connected to a pull rod via a first Y-type connector, and the other end of the ratchet bar is connected to a pawl that can drive the ratchet wheel to rotate. The pull rod is then connected to one end of a push-pull shaft via a second Y-type connector. The push-pull shaft is sleeved in a linear bearing seat, and the other end of the push-pull shaft is connected and fixed to the end of a push-pull plate. A vertical displacement cylinder capable of driving the push-pull shaft to move up and down is installed in the middle of the push-pull plate. The material distribution trough pipe also has several waste material chambers for receiving waste material at the left screw and right screw respectively.

[0021] Preferably, the material storage and distribution mechanism includes a valve plate, a valve stem, a valve sleeve, a push-pull rod, and a fixed plate; the valve plate is connected to one end of the valve stem, the two sides of the valve stem are installed in the valve sleeve, 2n valve stems are fixed together on the push-pull rod, and 2n valve sleeves are fixed together on the fixed plate. The fixed plate is provided with a mechanism that can drive the push-pull rod and the valve plate to move back and forth to realize the opening and discharging and closing of the 2n valve chambers for material storage.

[0022] Preferably, the primary and secondary material-distributing mechanisms each include a material-distributing shell and a constant-distributing core disposed within the material-distributing shell. The material-distributing shell includes a receiving pipe and a left and a right discharge pipe located at the lower end of the material-distributing shell. The constant-distributing core includes a pointed head extending into the receiving pipe and two guide plates located above the left and right discharge pipes, respectively. The middle part of the constant-distributing core is disposed inside the material-distributing shell via a rotating shaft. The receiving pipe of each material-distributing shell in the primary material-distributing mechanism is disposed at the discharge port of each valve chamber. The left and right discharge pipes of each material-distributing shell in the primary material-distributing mechanism are respectively disposed at the receiving pipe of each material-distributing shell in the secondary material-distributing mechanism.

[0023] Preferably, the keel mechanism includes a plurality of keel rods, an upper fixing block, a bottom material cup, and keel rings. The upper ends of the plurality of keel rods are fixed by the upper fixing block, which is fixedly mounted on the top fixing plate. The lower ends of the plurality of keel rods extend through the bottom material cup and are fixed. Each keel rod is fixedly connected to the upper fixing block and the bottom material cup by screws. The middle parts of the plurality of keel rods are fixedly connected by a plurality of keel rings. The generating mechanism includes a plurality of deliquescence discs fixed to the outside of the plurality of keel rods. The deliquescence discs have a material dispensing port at their center. The material closing mechanism includes a middle fixing cup fitted below the bottommost deliquescence disc. The middle fixing cup has a central discharge hole at its center. The middle fixing cup also has a material discharge port. A central discharge cone is used to block the central discharge hole. Several keel rods pass through the central solid cup and are fixedly connected to the central solid cup with screws. A bidirectional cylinder is installed in the keel mechanism. The upper piston rod of the bidirectional cylinder is connected to the central discharge cone. The central discharge cone can open the central discharge hole by following the upper piston rod. The powder collection mechanism includes a vacuum conveyor located below the bottom material cup. The vacuum conveyor is connected to the bottom discharge hole in the center of the bottom material cup. A bottom discharge cone that can block the bottom discharge hole is also provided on the bottom material cup. The bottom discharge cone is connected to the lower piston rod of the bidirectional cylinder. A bottom cover that can cover the vacuum conveyor is also connected below the bottom material cup. The bottom material cup is installed and fixed to the bottom fixing plate by a bottom cone ring.

[0024] Preferably, the center of the deliquescence tray is further provided with an expanding tube core that is fixedly connected to the keel ring. The length of the expanding tube core is the same as the length of the deliquescence tray, and the cross-sectional area of ​​the expanding tube core is 1 / 3 of the cross-sectional area of ​​the center of the deliquescence tray.

[0025] Preferably, the dust-proof mechanism includes a dust-proof cloth that can cover the entire keel mechanism, and the dust-proof cloth is fixed in the cloth-fixing ring groove of the cloth-fixing tray and the bottom material cup by upper steel hoop and lower steel hoop respectively.

[0026] Preferably, the primary reaction vessel and the secondary reaction vessel are also connected to an electric heater auxiliary device, and the control center is electrically connected to the electric heater auxiliary device.

[0027] This invention has the following advantages over the prior art:

[0028] 1. Reduce pollution: There are two ways to arrange the storage module, distribution module and generating module: one is to build the equipment inside the warehouse, that is, all three are fixed on the inner wall above the grain surface, which is convenient for centralized loading of medicine and avoids contact between medicine and food; the other is to place the three outside the warehouse, forming an integrated machine with the processing and measurement and control modules, which is convenient for random use. Regardless of the method, the technology minimizes the contact between people and medicine and medicine and the environment, reduces the harm of toxic gas in the environment, and ensures personal safety. This case adopts the former method of building the equipment inside the warehouse.

[0029] 2. Convenient management: Both the processing module and the measurement and control module are external devices, which facilitates operation and management and enables real-time monitoring.

[0030] 3. Unmanned fumigation: The pesticide is applied in a single, centralized, mouth-to-mouth manner in the storage tank, avoiding the personal safety risks of multiple pesticide applications on the grain surface and realizing unmanned fumigation for pest control in stored grain.

[0031] 4. Reduced dosage: This technology involves fumigation operations inside the grain pile in the warehouse, which can effectively avoid the shortcomings of surface fumigation and whole-warehouse circulation fumigation. The dosage of ineffective concentration in the space can be reduced by 30%-50% or even more. At the same time, high concentration in the warehouse space also increases the possibility of leakage.

[0032] 5. Reduced corrosion: The power source for the material feeding mechanism of the storage module, the material dispensing mechanism of the dispensing module, and the switching cylinder of the generating module are all pneumatically operated, and important generating components are made of corrosion-resistant materials, avoiding safety risks such as corrosion from electricity and mechanisms.

[0033] 6. Increased speed and efficiency: The screw-driven one-to-four and equal-weight self-dividing four-to-eight and eight-to-sixteen-fold feeding modules enable aluminum phosphide to fully expand its surface area in the deliquescence pan of the generating chamber and fall naturally downwards, which is more conducive to improving the deliquescence reaction rate and controlling the effective concentration.

[0034] 7. Harmless treatment: The residue in the bottom cup and the powder-separating cloth after the aluminum phosphide reaction in the reaction module can be transported by a vacuum conveyor and concentrated at the same interface outside the warehouse. Then, the treatment module performs harmless treatment in batches in a one-to-many manner. At the same time, the residual gas is still sent back to the grain pile, which is beneficial to the utilization of the drug.

[0035] 8. Precision fumigation: The drug can be stored in the storage tank for a long time and generated in a self-controlled manner multiple times. The timing and dosage of phosphine generation in the generation module can be selected appropriately, which is more conducive to low-dose slow release of stored grain and effectively achieves the optimal CT value for lethal concentration of pests, thus realizing precise insecticidal fumigation.

[0036] 9. Safe and reliable: The phosphine generator is built-in, and the processing device is equipped with automatic operation and alarm devices, which do not require long-term personnel on duty. All fumigation drugs and residual powder are concentrated in the powder-proof cloth, which will not be carried into the grain pile and contaminate the grain due to the fan circulation, thus ensuring the safety of grain, equipment and personnel.

[0037] 10. Facilitates grain preservation: The core of this technology is that the application, generation, and circulation of fumigation are completely integrated into the grain warehouse's circulation and ventilation system, which is beneficial for the daily operation and management of grain storage warehouses, such as airtightness and air conditioning temperature control, thus better protecting the country's food supply. Attached Figure Description

[0038] Figure 1 This is a partially exploded structural diagram of the material storage module, material distribution module, generating module, and frame housing of this utility model;

[0039] Figure 2 This is a schematic diagram of the processing module of this utility model.

[0040] Figure 3 This is a schematic diagram of the measurement and control module of this utility model.

[0041] Figure 4 This is an exploded view of the material storage module of this utility model;

[0042] Figure 5 This is a front view of the material storage module of this utility model;

[0043] Figure 6 for Figure 5 Cross-sectional view of section AA;

[0044] Figure 7 This is a schematic diagram of the mixing device of the material storage module of this utility model;

[0045] Figure 8 This is a schematic diagram of the material distribution module of this utility model;

[0046] Figure 9 for Figure 8 Cross-sectional view of section AA;

[0047] Figure 10 This is a front view of the material dispensing module of this utility model;

[0048] Figure 11 for Figure 10 Cross-sectional view of section AA;

[0049] Figure 12 This is a side view of the material dispensing module of this utility model;

[0050] Figure 13 This is a schematic diagram of the material distribution trough pipe of this utility model;

[0051] Figure 14 This is a schematic diagram of the screw assembly of this utility model;

[0052] Figure 15 This is a schematic diagram of the structure of the flip-top shell of this utility model;

[0053] Figure 16 This is a schematic diagram of the structure of the equal-turning core of this utility model;

[0054] Figure 17 This is a schematic diagram of the generating module of this utility model;

[0055] Figure 18 For the present utility model Figure 17 Enlarged structural diagram of section A in the middle;

[0056] Figure 19 This is a schematic diagram of the generating mechanism of this utility model;

[0057] Figure 20 This is a schematic diagram of the structure of the deliquescence tray of this utility model;

[0058] Figure 21 This is a schematic diagram of the structure of the medium-solid cup of this utility model;

[0059] Figure 22 This is a front view of the base cup of this utility model;

[0060] Figure 23 This is a top view of the base cup of this utility model;

[0061] Figure 24 This is a schematic diagram of the structure of the tube expander of this utility model;

[0062] Figure 25 This is a front view of the frame housing of this utility model;

[0063] Figure 26 This is a side view of the frame housing of this utility model;

[0064] Figure 27 This is a schematic diagram of the internal fixation bracket of this utility model;

[0065] Figure 28 This is a schematic diagram of the cable tray of this utility model. Detailed Implementation

[0066] The present invention will be further described below with reference to the accompanying drawings.

[0067] The storage module A000 includes a storage mechanism, a discharging mechanism, and a dropping mechanism, used to store and drop materials, specifically storing aluminum phosphide drugs and dropping them into the distribution module B000.

[0068] The storage mechanism includes an upper storage cover A025 and a lower storage tank A005. A circular rubber pad A024 is laid on the bottom surface inside the storage cover A025. The storage tank A005 between the storage covers A025 is fixedly installed by four live bolts A004.

[0069] The center of the storage cover A025 is equipped with a guide tube A026 that is perpendicular to the cover surface at a 30-45 degree angle. The upper end of the guide tube A026 is connected to one end of the manual ball valve A027 by a thread. The other end of the manual ball valve A027 is connected to one end of the discharge tube A028 by a thread. The other end of the discharge tube A028 is connected to the tightening cover A029 by a thread.

[0070] The feeding mechanism includes a mixer A031 and a mixing cylinder A008. A central shaft hole A033 is opened at the center of the bottom of the storage tank A005. There are also mounting thread holes A034 around the central shaft hole A033. A mixer A031 that can rotate around the central shaft hole A033 is installed on the inner bottom surface of the storage tank A005. A countersunk hole A032 is opened on the mixer A031 for mounting a pressure spring A003. The outer bottom surface of the storage tank A005 is connected to the mixing cylinder A008 that can rotate 90 degrees through the central shaft hole A033. The mixing cylinder A008 is fixed to the fixed plate A006 by bolts. The fixed plate A006 is then fixed to the bottom center of the storage tank A005 by bolts through the mounting thread holes A034.

[0071] The mixer A031 and the mixing cylinder A008 are fixedly connected by bolt A001; the gasket A002 is placed between bolt A001 and pressure spring A003 to act as a gasket.

[0072] The pressure spring A003 mainly functions to press the mixer A031 to close the upper port of the discharge pipe A007 and increase the sealing effect of the storage tank A005 when the power is off.

[0073] The bottom of the mixer A031 also has a groove A030, which is used to prevent the powder from clogging when the mixer A031 rotates, and facilitates discharge from the middle.

[0074] The thin edges A036 on both sides of the mixer A031 facilitate the rotational mixing motion. When material needs to be discharged, the mixer A031 can rotate 90 degrees under the drive of the mixing cylinder A008 to open the discharge port at the bottom of the storage tank A005 for automatic material discharge. After a short pause to discharge the material, it rotates 90 degrees to close the discharge port A035 and stop feeding. The mixer A031 mainly functions to block the discharge port A035 and to stir and promote the material to fall into the discharge pipe A007, preventing the material from caking and blocking the discharge port A035 for a long time. The mixing cylinder A008 is controlled by the solenoid valve E013.

[0075] The feeding mechanism includes a feeding pipe A007, a reserved pipe A009, and a tilting device. The upper end of the feeding pipe A007 is located at the bottom of the storage tank A005 and is perpendicular to the bottom surface at a 30-45 degree angle. The lower end of the feeding pipe A007 is connected to the upper end of the reserved pipe A009. The reserved pipe A009 is designed to hold a certain volume of medicine, approximately four times the sum of the volumes of the four valve chambers in the feeding module. The lower end of the reserved pipe A009 is connected to the upper end of the valve core A019 of the tilting device.

[0076] The tilting device consists of a valve housing A018, a valve core A019, a valve shaft A017, a valve plate A015, a front bushing A015 and a rear bushing A016, a drive arm A020, a movable connector A021, a tilting cylinder A022, and a counterweight device. The counterweight device plays a counterweight role and consists of a counterweight hammer A012, a counterweight rod A013, a fixed connector A014, and a locking nut A011.

[0077] The lower end of the valve core A019 is tightly fitted inside the upper end of the valve housing A018. The two sides of the left side of the valve housing A018 have bushing mounting holes. The valve shaft A017 has a groove, and the valve plate A010 is installed in the middle. Both ends pass through the front bushing A015 and the rear bushing A016 and are prevented from axial movement by "O" shaped retaining rings and pins. The other end of the valve shaft A017 is also connected to the drive arm A020 ​​and connected to the movable connector A021. The movable connector A021 is directly connected to one end of the tilting cylinder A022 to perform a push-pull action. The other end of the tilting cylinder A022 is fixedly connected to the frame.

[0078] The main function of the counterweight device is to push back the tipping cylinder A022 when the power is off so that the valve plate A010 is in the horizontal closed valve core A019 state, thereby increasing the sealing effect of the storage tank A005.

[0079] The counterweight device is fixedly connected to the drive arm A020 ​​at one end by a fixed connector A014, and connected to one end of the counterweight rod A013 at the other end. The other end is equipped with a counterweight hammer A012, and the two ends of the counterweight hammer A012 are locked with nuts A011.

[0080] After the reserved pipe A009 is filled with medicine, the turning device will activate the turning cylinder A008 under the control of the solenoid valve E012, which will drive the drive arm A020 ​​connected to the valve shaft A017 to move. At this time, the valve plate A010 on the valve shaft A017 will turn over to realize the turning action.

[0081] The material distribution module is mainly used for evenly distributing and releasing materials. Taking an example where the number of valve chambers on each side is n=2, it includes:

[0082] The feeding mechanism B001 is used to receive materials and distribute them evenly into four valve chambers labeled B041, B042, B043, and B044 through the feeding module. Each valve chamber has an equal volume.

[0083] The material storage and distribution mechanism is used to open or close the valve chambers. When the valve chambers are opened, the material in the four valve chambers enters the first-stage material distribution mechanism. When the valve chambers are closed, the material is stored in the valve chambers.

[0084] The primary material sorting mechanism B002 receives materials from four valve chambers and divides them into eight equal parts before they enter the secondary material sorting mechanism.

[0085] The secondary sorting mechanism B003 divides the 8 portions of material received from the primary sorting mechanism B00 into 16 portions.

[0086] The material in receiving pipe B010 moves to the left and right in the distribution trough pipe B022 as the left screw B039 and right screw B036 rotate. The left screw B039 sequentially enters the left I valve chamber B042 and the left II valve chamber B041 to push the drug; the right screw B036 sequentially enters the right I valve chamber B043 and the right II valve chamber B044 to push the drug, thus achieving a one-to-four distribution. If there is too much material, it will be pushed into the left surplus material chamber B045 and the right surplus material chamber B04; if there is too little material, it can normally enter the next stage.

[0087] The left screw B039 and the right screw B036 are both mounted on the central shaft B034. The left and right sides of the central shaft B034 are each equipped with a left feed plate B040 and a right feed plate B037, which are supported by the left shaft seat B017 and the right shaft seat B038. The outermost two ends of the central shaft B034 are each equipped with a ratchet mechanism.

[0088] The ratchet mechanism consists of a ratchet B016, a ratchet bar B032, a pawl B033, and a stop pin B015. The ratchet B016 is fixed on the central shaft B034. The stop pin B015 contacts the ratchet B016 and is mounted on the stop pin fixing plate B014. The ratchet bar B032 is connected to the pull rod B013 via a first Y-type connector B025. The pull rod B013 is then connected to one end of the push-pull shaft B011 via a second Y-type connector B012. The push-pull shaft B011 is assembled. Inside the linear bearing housing B008; the other end of the push-pull shaft B011 is connected and fixed to both ends of the push-pull plate B009, and the push-pull plate B009 is equipped with a vertical displacement cylinder B027 in the middle; by moving the displacement cylinder B027 up and down, the ratchet B016 is rotated, thereby realizing the movement of the material in the distribution trough pipe B022 and reaching the left I valve chamber B042, the left II valve chamber B041, the right I valve chamber B043 and the right II valve chamber B044 respectively. These four valve chambers have equal volumes.

[0089] Each valve chamber on the left and right is controlled by a main valve control mechanism to store or release materials. The main valve control mechanism includes a valve plate B023, a valve stem B019, a valve sleeve B021, a push-pull rod B020, and a fixed plate B007. One end of the valve plate B023 is connected to one end of the valve stem B019. The two sides of the valve stem B019 are installed in the valve sleeve B021. The other ends of the four identical valve stems are fixed to a push-pull rod B020. The valve sleeve B021 is also fixed to a fixed plate B007. The push-pull rod B020 realizes the opening and closing of the left and right valve chambers for material release and material storage by the back and forth movement of the push-pull cylinder B048.

[0090] The primary and secondary material sorting mechanisms each include a material sorting shell and a constant-turning core B005 disposed within the material sorting shell B056. The material sorting shell B056 includes a receiving pipe B057 and a left discharge pipe B054 and a right discharge pipe B055 located at the lower end of the material sorting shell B056. The constant-turning core B005 includes a pointed part B050 extending into the receiving pipe B057 and two guide plates B049 located above the left discharge pipe B054 and the right discharge pipe B055, respectively. The middle part of the constant-turning core B005 is disposed inside the material sorting shell B056 via a rotating shaft B051. The receiving pipe B057 of each turning shell B056 in the first-stage turning and separating mechanism is set at the discharge port of each valve chamber. The left discharge pipe B054 and the right discharge pipe B055 of each turning shell B056 in the first-stage turning and separating mechanism are respectively set at the receiving pipe B057 of each turning shell B056 in the second-stage turning and separating mechanism.

[0091] The materials from the left and right valve chambers I and II will simultaneously and sequentially enter the first-stage flapper sampler B002, and then enter the second-stage flapper sampler B003. Both the first-stage and second-stage flapper samplers consist of a flapper core B005, a flapper shell B056, a receiving pipe B057, a left discharge pipe B054, and a right discharge pipe B055. After passing through the first-stage and second-stage flapper samplers, the materials are automatically and evenly distributed and naturally flow into the inlet of the corresponding generating module. The first-stage flapper sampler B002 achieves a 4:8 ratio, and the second-stage flapper sampler B003 achieves an 8:16 ratio.

[0092] The phosphine gas generating module in this solution is mainly used for generating phosphine gas, i.e., fully reacting with moisture in the flowing air to deliquesce, and automatically feeding the residue into the processing module. Taking 16 phosphine generating chambers C007 as an example, each phosphine generating chamber C007 is composed of a keel rod C026, an upper solid block C031, a keel ring C033, a solid cloth disc C030, a deliquescent disc C032, a middle solid cup C023, a middle discharge cone C012, a bidirectional cylinder C009, a bottom material cup C006, a bottom discharge cone C018, a bottom cover C005, and a powder-separating cloth C025.

[0093] The keel rod C026 has three equivalent keel rods C027 and C035. The upper end is fixed by the upper fixing block C031, the lower end passes through the bottom material cup C006 and is fixed, and the middle part is fixed by the keel ring C033. The upper end of the keel ring C033 is equipped with the fixing block C031. Each upper fixing block C031 is mounted on the fixing plate C001. The distance between each keel ring C033 is equal to the distance between each deliquescence disc C032. The number of deliquescence discs C032 of the generating mechanism C002 can be increased or decreased according to actual needs. Generally, there are 4-10 groups. In this embodiment, there are 8 groups, which are connected in series on the three keel rods.

[0094] The middle solid cup C023 of the material closing mechanism C003 is tightly connected to the lower end of the last deliquescence plate C034. The last deliquescence plate C034 does not have a material outlet C037. The middle solid cup C023 is equipped with a middle discharge cone C012 in the center and a middle residual hole C052 in the center. Several keel rods pass through the middle solid cup C023 and are fixedly connected to the middle solid cup C023 by screws set in screw holes C050. When aluminum phosphide material falls into the deliquescence plate C032, the middle discharge cone C012 will close the middle residual hole C052 of the middle solid cup C032 due to its own weight, without the action of the upper moving cylinder C014. After aluminum phosphide reacts with water molecules in the flowing air to form aluminum hydroxide powder, its volume increases by about twice. The increased volume of the material will overflow from the edge of the deliquescence plate C032 and fall into the bottom material cup C006 and the powder separating cloth C025. The powder-separating cloth C025 is fixed to the cloth-fixing disc C030 and the cloth-fixing ring groove C040 of the bottom material cup C006 by the upper steel hoop C028 and the lower steel hoop C022, respectively. After the aluminum phosphide material has basically completed its deliquescence, the middle discharge cone C012 will open under the action of the upper moving cylinder C014 of the bidirectional cylinder, so as to allow the powder to continue to fall freely from the residue discharge hole C052 into the bottom material cup C006.

[0095] The middle discharge cone C012 is connected to the piston rod C013 of the upper moving cylinder C014, and the bottom discharge cone C018 is connected to the piston rod C016 of the lower moving cylinder C015.

[0096] Whether or not an expansion core C047 is added to the center of the deliquescent disc C032 depends on whether the fumigation material is powder, tablet or pill. If it is powder, an expansion core C047 can be added to reduce the central volume and reduce the amount of medicine. The length of the expansion core C047 is equal to the total length of the deliquescent disc C032, and the thickness is 1 / 3 of the central cross-sectional area of ​​the deliquescent disc C032. It is fixed to the keel ring C033.

[0097] The bottom material cup C006 has three keel rod holes C046 and four air pipe through holes C045 for the air pipes C011 of the bidirectional cylinder C009 to pass through, as well as a bottom discharge hole C042. When the aluminum hydroxide residue powder accumulates to a certain amount, the lower moving cylinder C015 of the bidirectional cylinder drives the bottom discharge cone C018 to open, and the residue powder will be sucked out by the vacuum conveyor C021 and sent to the processing module for deep processing.

[0098] The bottom discharge cone C018 is similar to the middle discharge cone C012, with two pointed ends. The bottom of the bottom material cup C006 is fitted with a bottom sealing cover C005, and each bottom material cup C006 is fixed to the bottom fixing plate C004 via a bottom cone ring 043. The bottom sealing cover 005 is provided with a feeding hole C010 for the vacuum feeder C021 to extend from.

[0099] The D000 phosphine tail gas treatment module is mainly used to further and thoroughly react the residual powder after aluminum phosphide deliquescence, and to return the toxic gas after reaction to the grain pile for effective utilization.

[0100] The phosphine tail gas treatment device D000 consists of a control center D026, an air compressor D003, a first vacuum feeder D004 and a second vacuum feeder D022, a high-pressure air supply pipe D001, a high-pressure gas supply pipe D019, a primary reaction tank D007, a secondary reaction tank D008 (also called a purification tank), a circulating fan D016, an air inlet pipe D012, a return pipe D015, and an electric heater auxiliary device D006.

[0101] The first vacuum conveyor D004 is installed at the bottom of the bottom cup of the phosphine generator. When the air compressor D003 is working and there is an air source, and the first inlet valve D027, the second outlet valve D020, and the feed valve D024 are all closed, while the second inlet valve D002 and the second outlet valve D021 are all open, the residual powder in the phosphine generator will be sucked in by the negative pressure of the vacuum conveyor D004 and sent to the first-stage reaction tank D007 through the high-pressure gas pipe D019. The toxic gas from the reaction tank D007 will enter the purification tank D008 through the guide pipe D017. Both of these reaction tanks are under high pressure. After being regulated by the pressure regulating valve D011, the gas directly enters the positive pressure end inlet pipe D012 of the circulating fan D016 and then enters the circulating air duct D013 system of the grain pile D014 to achieve fumigation and pest control. The negative pressure airflow at the top of the grain pile D014 is connected to the return pipe D015 and returns to the circulating fan D016, forming a closed loop for circulating fumigation, thereby achieving effective utilization of residual gas and reducing toxic gas emissions.

[0102] The second vacuum conveyor D022 is used for treating residual powder from the original fumigation of the grain silo. The powder collection box D023 is used to collect the residual powder, and its treatment process is similar to that of the residue treatment in this case. However, it requires closing the second inlet valve D002 and the second outlet valve D021, and opening the first inlet valve D027, the second outlet valve D020, and the feed valve D024 to perform residue treatment. Furthermore, the phosphine tail gas treatment device D000 can not only deeply treat the residual powder generated by this technology and equipment, but can also be used to treat the residual powder originally picked up by manual operation.

[0103] Both the primary reaction vessel D007 and the secondary reaction vessel D008 are equipped with pressure gauges D018 on their tops to prevent excessive pressure and ensure safe explosion. Both reaction vessels are equipped with residual liquid discharge ports D009 at their bottoms to facilitate the removal of residual liquid after the reaction. In this embodiment, an electric heater auxiliary device D006 is also added, which can improve the reaction speed and thoroughness of the drugs in the two vessels and minimize the toxicity of the residual liquid.

[0104] The control center D026 is the control center of the whole machine. It mainly controls the air compressor D003, two sets of vacuum feeders, two-stage reaction tanks and solenoid valves of each inlet and outlet air pipe, electric heater auxiliary device D006 and circulating fan D016. It also has a phosphine leak prevention alarm device D025 installed. Once a pipeline or joint leak occurs, the phosphine alarm device D025 can immediately sound an alarm to ensure safe use.

[0105] The measurement and control module E000 is the central control unit of this utility model technology, used for the detection and control of the entire system.

[0106] The measurement and control module E000 mainly includes the detection mechanism E001, the analysis and control center E004, the joint control center E005, the actuator E011, and the operation and display device E014.

[0107] The detection unit E001 mainly collects data from the pH3 concentration detector E002 and the temperature and humidity detector E003 inside the grain pile and in the pipeline. After analysis by the analysis and control center E004, the execution unit E011 performs the action.

[0108] The actuator E011 mainly consists of solenoid valves EQ1E013, EQ2E012, EQ3E007, EQ4E008, EQ5E009, and EQ6E010. These valves respectively control the mixing cylinder A028, the tilting cylinder A016, the moving cylinder B027, the pushing cylinder B048, the upward cylinder C014, and the downward cylinder C015.

[0109] The control center E005 contains a control chip controller E006, which communicates control information with the system's display device E014 and controls the control center D026 of the processing module D000 to achieve orderly operation of the entire control system and ensure the safe and normal operation of the powder suction and circulation system.

[0110] The rack enclosure F000 mainly includes an internal fixed bracket F017, an outer enclosure F011, a cable tray F012, and enclosure fixing clips, namely upper fixing clip F010, middle fixing clip F009, lower fixing clip F006, and thermal insulation cotton F013.

[0111] The internal fixed bracket F017 is mainly used to install and fix the storage tank A004 of the storage module A000 and the turning mechanism A007, the first-level turning and turning mechanism and the second-level turning and turning mechanism of the distribution module B000, and the phosphine generation chambers of the generation module C000.

[0112] The outer casing F011 primarily encloses the storage module A000, the distribution module B000, and the generating module C000 into a single unit. It has two air inlets and two air outlets on each side of the bottom for easy connection to the duct system at the positive pressure end of the original fumigation circulating fan in the grain silo. There are two installation methods for the air inlets and outlets. One is installation on the left side of the silo: the bottom air inlet pipe F005 on the left side of the equipment is the air inlet pipe, and the upper air outlet pipe F008 on the right side of the equipment is the air outlet pipe. The other is installation on the right side of the silo: the bottom air inlet pipe F007 on the right side of the equipment is the air inlet pipe, and the upper air outlet pipe F003 on the left side of the equipment is the air outlet pipe.

[0113] There are two cable trays F012, one on each side, which are fixed to the upper sides of the outer casing F011. Each cable tray F012 has 8 fixing holes F014, 8 air material pipe holes F015, and 24 air pressure pipes F016, which are used to connect the air pipes from the cylinders in the storage module A000, the distribution module B000, and the generating module E000.

[0114] The bottom fixing clip F006, middle fixing clip F009, and top fixing clip F010 fix the box to the wall from the bottom, middle, and top parts, respectively.

[0115] F103 insulation cotton is laid between the box and the wall to provide insulation, heat protection, and cushioning. Its area is equal to the size of the back of the outer box.

[0116] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A phosphine gas generating system, characterized in that, include: A material storage module includes a material storage mechanism, a material dispensing mechanism, and a material dropping mechanism. The material storage mechanism includes a material storage tank and a material storage cover connected to the tank by several live bolts. The center of the material storage cover is equipped with a guide pipe perpendicularly upward at a 30-45 degree angle to the cover surface. The material dispensing mechanism includes a mixing cylinder located on the back of the material storage tank and a mixer located inside the material storage tank and connected to the mixing cylinder. A material dropping port is provided inside the material storage tank. The mixer opens or closes the material dropping port under the action of the mixing cylinder. The material dropping mechanism includes a material dropping pipe connected to the material dropping port, a pre-reserved pipe connected to the material dropping pipe, and a flipping device capable of closing or opening the bottom opening of the material dropping pipe. The material dropping pipe is perpendicularly downward at a 30-45 degree angle to the bottom surface of the material storage tank. A material distribution module includes a pushing mechanism, a storage and distribution mechanism, a primary sorting and distribution mechanism, and a secondary sorting and distribution mechanism. The pushing mechanism receives material from the dropping mechanism and distributes it evenly into 2n valve chambers, each with an equal volume. The storage and distribution mechanism opens or closes the valve chambers; when the valve chambers are open, the material in the 2n chambers enters the primary sorting and distribution mechanism; when the valve chambers are closed, the material is stored within the valve chambers. The primary sorting and distribution mechanism receives the material from the 2n chambers and divides it into 4n portions before it enters the secondary sorting and distribution mechanism. The secondary sorting and distribution mechanism divides the 4n portions received from the primary sorting and distribution mechanism into 8n portions. A generating module includes multiple phosphine generating chambers, which are fixed together by a top fixing plate and a bottom fixing plate. Each phosphine generating chamber includes a supporting keel mechanism. Inside the keel mechanism, there is a generating mechanism for generating phosphine gas, a material closing mechanism for preventing powder from falling, and a powder collecting mechanism for collecting powder. Outside the keel mechanism, there is also a dustproof mechanism for sealing the phosphine generating chamber. A processing module includes an air compression mechanism, a vacuum material suction mechanism, an aluminum phosphide residue generator, a fan circulation device, and a control center. The air compression mechanism includes an air compressor and a high-pressure air supply pipe connected to the air compressor. The vacuum material suction mechanism includes a first vacuum conveyor and a second vacuum conveyor connected in parallel, connected by a high-pressure air supply pipe and a high-pressure gas supply pipe. The first vacuum conveyor has a first inlet valve and a first outlet valve on each side, and the second vacuum conveyor has a second inlet valve and a second outlet valve on each side. The second vacuum conveyor is connected to… The device includes a powder collection box for receiving residual powder, and a feed valve is provided between the powder collection box and the second vacuum conveyor; the aluminum phosphide residue generating device includes a primary reaction tank and a secondary reaction tank connected in series, the primary reaction tank is connected to a high-pressure gas pipeline, and the primary reaction tank and the secondary reaction tank are connected through a guide pipe; the fan circulation device includes a circulation fan connected to the secondary reaction tank, and the circulation fan is connected to the circulation duct system of the grain pile through a positive pressure end air inlet pipe and a return pipe; the control center is electrically connected to the air compressor, the first vacuum conveyor, the second vacuum conveyor, the primary reaction tank, the secondary reaction tank, and all valves; A measurement and control module includes a detection mechanism, an analysis and control center, a joint control center, an execution mechanism, and an operation and display device. The detection mechanism includes a pH3 concentration detector and a temperature and humidity detector installed inside the grain pile and in the pipeline. The data collected by the detection mechanism is analyzed by the analysis and control center and then executed by the execution mechanism. The execution mechanism includes solenoid valves that control each cylinder. The joint control center is equipped with a joint control chip controller, which communicates control information with the operation and display device and is connected to the control center of the processing module. A frame housing, comprising an inner fixed bracket, an outer housing, a cable tray, and housing fixing clips; the inner fixed bracket is used to install and fix the storage tank and turning mechanism of the storage module, the primary turning and turning mechanism and the secondary turning and turning mechanism of the dispensing module, and each phosphine generation chamber of the generation module; the outer housing surrounds the storage module, the dispensing module, and the generation module into one unit, and has two air inlets and two air outlets on each side of the bottom.

2. The phosphine gas generating system according to claim 1, characterized in that: The flipping device includes a valve housing, a valve core, a valve shaft, a valve plate, a front bushing, a rear bushing, a drive arm, a movable connector, a flipping cylinder, and a counterweight device. The lower end of the valve core is tightly fitted inside the upper end of the valve housing. Bushing mounting holes are opened on both sides of the left side of the valve housing. The valve shaft has grooves and slots, with the valve plate installed in the middle. Both ends pass through the front bushing and the rear bushing and are secured with O-ring clips to prevent axial movement. The other end of the valve shaft is connected to the drive arm and the movable connector. The movable connector is directly connected to one end of the flipping cylinder to perform a push-pull action. The other end of the flipping cylinder is fixedly connected to the frame housing. After the reserved tube is filled with medicine, the flipping cylinder drives the drive arm connected to the valve shaft to move, and the valve plate mounted on the valve shaft flips.

3. The phosphine gas generating system according to claim 1, characterized in that: The pushing module includes a material distribution trough, a screw assembly disposed within the material distribution trough, and a ratchet assembly that drives the screw assembly to rotate. The screw assembly includes a central shaft and a left screw and a right screw sleeved on the central shaft. The threads on the left screw and the right screw are arranged in opposite directions. The material distribution trough has n valve chambers at the left screw and the right screw, respectively. A left baffle and a right baffle are respectively disposed at the end of the material distribution trough on the central shaft. The two ends of the central shaft are supported by a left shaft seat and a right shaft seat, respectively.

4. A phosphine gas generating system according to claim 3, characterized in that: The ratchet assemblies are located at both ends of the central shaft. Each ratchet assembly includes a ratchet, a ratchet bar, a pawl, and a stop pin. The ratchet is fixed on the central shaft, and the stop pin contacts the ratchet and is mounted on the stop pin fixing plate. One end of the ratchet bar is connected to a pull rod via a first Y-type connector, and the other end of the ratchet bar is connected to a pawl that can drive the ratchet to rotate. The pull rod is then connected to one end of a push-pull shaft via a second Y-type connector. The push-pull shaft is sleeved in a linear bearing seat, and the other end of the push-pull shaft is connected and fixed to the end of a push-pull plate. A vertical displacement cylinder that can drive the push-pull shaft to move up and down is installed in the middle of the push-pull plate. The material distribution trough pipe also has several waste material chambers for receiving waste material at the left screw and right screw respectively.

5. A phosphine gas generating system according to claim 3, characterized in that: The material storage and distribution mechanism includes a valve plate, a valve stem, a valve sleeve, a push-pull rod, and a fixed plate. The valve plate is connected to one end of the valve stem, and both sides of the valve stem are installed in the valve sleeve. 2n valve stems are fixed together on the push-pull rod, and 2n valve sleeves are fixed together on the fixed plate. The fixed plate is provided with a mechanism that can drive the push-pull rod and the valve plate to move back and forth to realize the opening and closing of the 2n valve chambers for material release and material storage.

6. A phosphine gas generating system according to claim 1, characterized in that: The primary and secondary material-distributing mechanisms each include a material-distributing shell and a constant-distributing core disposed within the material-distributing shell. The material-distributing shell includes a receiving pipe and a left and right discharge pipe located at the lower end of the material-distributing shell. The constant-distributing core includes a pointed head extending into the receiving pipe and two guide plates located above the left and right discharge pipes, respectively. The middle part of the constant-distributing core is disposed inside the material-distributing shell via a rotating shaft. The receiving pipe of each material-distributing shell in the primary material-distributing mechanism is disposed at the discharge port of each valve chamber. The left and right discharge pipes of each material-distributing shell in the primary material-distributing mechanism are respectively disposed at the receiving pipes of each material-distributing shell in the secondary material-distributing mechanism.

7. A phosphine gas generating system according to claim 1, characterized in that: The keel mechanism includes several keel rods, an upper fixing block, a bottom material cup, and keel rings. The upper ends of the several keel rods are fixed by the upper fixing block, which is fixedly mounted on the top fixing plate. The lower ends of the several keel rods extend through the bottom material cup and are fixed. Each keel rod is fixedly connected to the upper fixing block and the bottom material cup by screws. The middle parts of the several keel rods are fixedly connected by multiple keel rings. The generating mechanism includes multiple deliquescence discs fixed to the outside of the several keel rods. The deliquescence discs have a material dispensing port in the center. The material closing mechanism includes a middle fixing cup fitted below the bottommost deliquescence disc. The middle fixing cup has a central discharge hole in the center and is also equipped with a sealable part. The intermediate discharge cone with a central discharge hole is connected to a central solid cup via several keel rods, which are fixed to the central solid cup with screws. A bidirectional cylinder is installed inside the keel mechanism. The upper piston rod of the bidirectional cylinder is connected to the intermediate discharge cone, which can open the intermediate discharge hole by following the upper piston rod. The powder collection mechanism includes a vacuum conveyor located below the bottom material cup. The vacuum conveyor is connected to the bottom discharge hole in the center of the bottom material cup. A bottom discharge cone that can block the bottom discharge hole is also provided on the bottom material cup. The bottom discharge cone is connected to the lower piston rod of the bidirectional cylinder. A bottom cover that can cover the vacuum conveyor is also connected below the bottom material cup. The bottom material cup is fixed to the bottom fixing plate by a bottom cone ring.

8. A phosphine gas generating system according to claim 7, characterized in that: The center of the deliquescence tray is also provided with an expansion tube core that is fixedly connected to the keel ring. The length of the expansion tube core is the same as the length of the deliquescence tray, and the cross-sectional area of ​​the expansion tube core is 1 / 3 of the cross-sectional area of ​​the center of the deliquescence tray.

9. A phosphine gas generating system according to claim 6, characterized in that: The dust-proof mechanism includes a dust-proof cloth that can cover the entire keel mechanism. The dust-proof cloth is fixed in the cloth-fixing ring groove of the cloth-fixing plate and the bottom material cup by upper and lower steel hoop clamps, respectively.

10. A phosphine gas generating system according to claim 1, characterized in that: The primary and secondary reaction vessels are also connected to an electric heater auxiliary device, and the control center is electrically connected to the electric heater auxiliary device.

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