Double-pipe type circulation device outside grain warehouse

Abstract

The utility model discloses a double-pipe type circulation device outside a grain warehouse, which relates to the technical field of grain storage, and comprises a horizontal warehouse, a double-pipe circulation system, a hydrogen phosphide gas generating device and a gas recovery unit, the double-pipe circulation system comprises circulation branch pipes which are transversely connected to two ventilation openings of the horizontal warehouse, the double-pipe circulation system, the gas recovery unit and the sealing connecting pipe are arranged, the double-pipe circulation system outside the horizontal warehouse is matched with the circulation fan to achieve circulation flow of gas, and fumigation gas can be evenly and rapidly diffused into a grain pile. According to the device, hydrogen phosphide gas is uniformly distributed in the granary, the efficient and uniform fumigation effect is achieved, the fumigation quality is improved, workers can be prevented from entering the granary for operation through operation outside the granary, the opportunity that the operators make contact with the hydrogen phosphide gas is reduced, the poisoning risk is reduced, and the operation safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of grain storage, and in particular relates to a double-tube circulation device outside a grain warehouse. Background Art

[0002] Fumigation of grain warehouses is an important part of the grain storage process, which can effectively prevent grain pests and mildew, and ensure the quality and safety of grain. However, most of the existing old warehouses have poor air tightness. It is difficult to control the required gas concentration in the warehouse during fumigation and it is difficult to ensure uniform gas concentration in the warehouse. Pests are easy to gather in grain piles, especially in areas with large impurities and damp places. It is difficult to kill them completely by fumigation once, which can easily cause grain heating and the occurrence of other pests, posing a great threat to safe grain storage. In order to achieve better results in phosphine fumigation, timely replenishment of medicine is a crucial link. In the existing technology, when replenishing medicine, it is difficult for a single-tube circulation device to achieve uniform gas concentration in the warehouse, and it takes a long time, and the fumigation effect is poor; in addition, although phosphine is a fumigant, it is highly toxic. Improper operation and lax protection can cause accidents such as poisoning of personnel, corrosion of equipment and gas explosion. Therefore, the safety of phosphine operations must be guaranteed. Reducing the concentration of phosphine and reducing the contact time of operators are important ways to achieve safe operation, but too low a concentration of phosphine cannot ensure the pest control effect, and the granary needs to be ventilated after the fumigation period. The residual phosphine gas in the granary will be directly discharged to the outside world, causing harm to the environment. Therefore, it is necessary to design a circulation device that can ensure the safety of the operation and meet the fumigation concentration to realize the fumigation circulation operation in the granary. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a double-tube circulation device outside a grain warehouse.

[0004] The utility model solves the technical problem by adopting the following scheme: a double-tube circulation device outside a grain warehouse, including a flat warehouse, a double-tube circulation system, a phosphine gas generating device and a gas recovery unit, wherein the double-tube circulation system includes a circulation branch pipe horizontally connected to two ventilation openings of the flat warehouse, two circulation main pipes are longitudinally arranged outside the flat warehouse, namely, a circulation main pipe 1 and a circulation main pipe 2, the lower ends of the two circulation main pipes are connected through a circulation fan, wherein the upper end of the circulation main pipe 2 is connected to the circulation branch pipe, and the circulation main pipe The upper end of one is connected to the bunk house, and electric valves are arranged on the two circulation main pipes, and the front ends of the electric valves on the two circulation main pipes are respectively connected with the application pipe and the return pipe, and the application pipe and the return pipe can be sealed and connected with the connecting pipe of the phosphine gas generating device through the sealing connecting pipe, and manual valves are installed on the application pipe and the return pipe; the gas recovery unit includes a recovery pipe connected to the circulation main pipe two and located at the rear end of the electric valve, and the filter box and the condenser are connected to the recovery pipe in sequence, and the end of the recovery pipe is connected to the external storage tank.

[0005] Furthermore, the middle position of the sealing connecting pipe is configured as a telescopic pipe section, and the inner wall of the sealing connecting pipe is symmetrically provided with reverse internal threads up and down, and the ends of the connecting pipes of the application pipe, the return air pipe and the phosphine gas generating device are respectively provided with external threads matching the internal threads in the sealing connecting pipe.

[0006] Furthermore, the ends of the drug application pipe, the air return pipe, and the connecting pipe of the phosphine gas generating device are all fixedly sleeved with sealing rings, and the inner walls of the upper and lower ends of the sealing connecting pipe are provided with annular grooves matching the sealing rings.

[0007] Furthermore, an electric valve 1 is provided on the circulation main pipe 1, an electric valve 2 is provided on the circulation main pipe 2, the drug application pipe is connected to the circulation main pipe 1, and a manual valve 1 is provided on the drug application pipe, the return air pipe is connected to the circulation main pipe 2, and a manual valve 2 is provided on the return air pipe, and an electric valve 3 is provided on the recovery pipe.

[0008] Furthermore, a gas concentration detector is installed on the circulation main pipe.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model is provided with a double-tube circulation system, a gas recovery unit and a sealed connecting pipe. The double-tube circulation system outside the warehouse cooperates with a circulating fan to realize the circulation flow of gas, so that the fumigation gas can be evenly and quickly diffused into the grain pile, ensuring the even distribution of the phosphine gas in the grain warehouse, achieving efficient and even fumigation effect, improving the fumigation quality, and avoiding personnel entering the warehouse for operation through operation outside the warehouse, reducing the chance of operators contacting with phosphine gas, reducing the risk of poisoning, and improving operation safety; the design of the sealed connecting pipe ensures the sealing of the pipeline connection, effectively preventing the leakage of phosphine gas; through the gas recovery unit, when the fumigation period is over, the residual phosphine gas can be recovered and processed by the gas recovery unit, realizing the effective recovery and utilization of phosphine gas, reducing environmental pollution, and saving resources at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 It is a partial enlarged structural schematic diagram of the utility model;

[0013] Figure 3 This is a schematic diagram of the sealing pipe connection structure of the utility model;

[0014] Figure 4 for Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0015] In the figure: 1. Bungalow warehouse; 2. Double-tube circulation system; 21. Circulation main pipe 1; 22. Circulation main pipe 2; 23. Circulation fan; 24. Electric valve 1; 25. Electric valve 2; 26. Application pipe; 27. Return air pipe; 28. Manual valve 1; 29. ​​Manual valve 2; 210. Circulation branch pipe; 211. Sealing collar; 3. Phosphine gas generator; 4. Ventilation port; 5. Gas recovery unit; 51. Recovery pipe; 52. Electric valve 3; 53. Filter box; 531. Filter plate; 54. Condenser; 55. Safety valve; 56. Storage tank; 6. Gas concentration detector; 7. Sealing connecting pipe; 71. Telescopic pipe section; 72. Ring groove. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] See also Figure 1-4 The utility model provides a technical solution for a double-tube circulation device outside a grain warehouse: Example

[0018] according to Figure 1 and Figure 2As shown, a double-tube circulation device outside a grain warehouse is provided. Two ventilation holes 4 are symmetrically arranged at the bottom of the outer wall of the flat warehouse 1, and the two ventilation holes 4 are connected to the circulation branch pipe 210 arranged horizontally on the outside of the flat warehouse 1. Two circulation main pipes are also arranged longitudinally on the outside of the flat warehouse 1, namely, the circulation main pipe 1 21 and the circulation main pipe 2 22. The circulation main pipe and the circulation branch pipe 210 are made of stainless steel. The lower ends of the circulation main pipe 1 21 and the circulation main pipe 2 22 are connected through a circulation fan 23, wherein the upper end of the circulation main pipe 2 22 is connected to the circulation fan 23. The circulation pipe 210 is connected, and an electric valve 25 is installed on the circulation main pipe 22. The upper end of the circulation main pipe 1 21 is connected to the bungalow warehouse 1, and an electric valve 1 24 is installed on the circulation main pipe 1 21. The front ends of the electric valves on the circulation main pipe 1 21 and the circulation main pipe 22 are respectively connected with a drug application pipe 26 and a return air pipe 27. A manual valve 1 28 is installed on the drug application pipe 26, and a manual valve 29 is installed on the return air pipe 27. The drug application pipe 26 and the return air pipe 27 can be sealed and connected with the connecting pipes at both ends of the phosphine gas generating device 3. The circulation pipes are all set outside the warehouse, which is suitable for the single-pipeline transformation of old warehouses, and the transformation cost and construction difficulty are low, and it is easy to inspect and maintain, reducing maintenance time and cost.

[0019] When applying pesticides for the first time, connect the phosphine gas generating device 3 to the pesticide application pipe 26, open the manual valve 1 28, close the electric valve and the manual valve 2 29, and the phosphine gas flows from the generating device through the circulation main pipe 2 22 and the circulation branch pipe 210, and then enters the warehouse through the ventilation port 4 to fumigate the grain in the granary. After the application of pesticides, close the manual valve 1 28, open the electric valve 1 24 and the electric valve 2 25, and turn on the circulation fan 23, so that the phosphine gas in the warehouse flows from the bottom to the top of the bungalow 1, and flows back to the circulation main pipe 2 22 through the circulation main pipe 1 21, and enters the bungalow 1 again, so as to realize the circulation of the phosphine gas in the granary and make the concentration of the phosphine gas in the granary uniform. When the gas concentration is insufficient and the pesticide needs to be supplemented, connect the output end and the input end of the phosphine gas generating device 3 to the application pipe 26, respectively. The medicine pipe 26 is connected to the return air pipe 27, the manual valve is opened, and the electric valve is closed. The phosphine gas flows from the generating device through the circulation main pipe 22 and the circulation branch pipe 210, and then enters the warehouse through the ventilation port 4, and then flows through the return air pipe 27 from the circulation main pipe 1 21 to enter the phosphine gas generating device 3. When the gas flows in the granary, part of the phosphine gas will remain in the granary, and part of the phosphine gas will flow back into the phosphine gas generating device 3, so as to realize the gas replenishment work in the granary, ensure that the phosphine gas concentration in the granary meets the standard, and avoid the excessive gas concentration caused by direct application of medicine, which is not conducive to subsequent ventilation and gas dispersion. When the medicine replenishment is completed, the manual valve can be closed, the phosphine gas generating device 3 can be evacuated, the bungalow 1 is in a closed state, and the pests in the granary are fumigated and eliminated by phosphine gas.

[0020] The system also includes a gas recovery unit 5. A recovery pipe 51 is connected to the rear end of the electric valve on the circulation main pipe 22. The electric valve 3 52, a filter box 53 and a condenser 54 are connected to the recovery pipe 51 in sequence. A multi-layer filter plate 531 is arranged in the filter box 53. The end of the recovery pipe 51 is connected to an external storage tank 56. A safety valve 55 is installed on the storage tank 56. When the grain in the granary has been in a closed fumigation period of about 14 days and the pest fumigation elimination work is basically completed, the granary needs to be ventilated. Before ventilation, the manual valve and the electric valve 22 can be closed. 5. Open the electric valve 3 52. When the circulating fan 23 operates again, the residual phosphine gas in the granary can be drawn into the recovery pipe 51 through the circulating main pipe 21, and the dust, fine grain particles and other impurities carried in the recovered gas are filtered out by the filter box 53. Then, the phosphine gas is condensed and liquefied into phosphine liquid through the condenser 54 and stored in the storage tank 56, so as to realize the recovery of phosphine and avoid the residual phosphine gas being directly discharged into the external environment when the granary is directly ventilated to harm the environment and human body, so as to realize the recycling and reuse of resources while protecting the environment.

[0021] A gas concentration detector 6 is installed on the circulation main pipe 21. When fumigating phosphine gas into the granary, the concentration of phosphine gas in the granary can be detected by the gas concentration detector 6 to determine whether it is necessary to continue to replenish the medicine. After the fumigation period, the gas concentration detector 6 can be used to detect and determine whether the phosphine gas in the granary has been completely dissipated. Example

[0022] On the basis of the first embodiment, in order to ensure that the phosphine gas does not leak, it is necessary to ensure the sealing of the connection between the pipelines. Therefore, the drug application pipe 26 and the gas return pipe 27 can be sealed and connected to the connecting pipes at both ends of the phosphine gas generating device 3 through the sealing pipe 7. The specific structure and connection relationship of the sealing pipe 7 are as follows: Figure 3 and Figure 4As shown, the middle section of the sealing pipe 7 is configured as a telescopic pipe section 71, and the sealing pipe 7 can be telescoped toward both ends. The inner wall of the sealing pipe 7 is provided with reversely symmetrical internal threads up and down, and the ends of the connecting pipes of the drug application pipe 26, the return air pipe 27 and the phosphine gas generating device 3 are respectively provided with external threads matching the internal threads in the sealing pipe 7. Through the cooperation of the internal and external threads, the two ends of the sealing pipe 7 can be respectively connected to the drug application pipe 26 (return air pipe 27) and the connecting pipe of the phosphine gas generating device 3, so that the two are connected together, and the ends of the drug application pipe 26, the return air pipe 27 and the connecting pipe of the phosphine gas generating device 3 are all fixedly sleeved with sealing collars 211 , and annular grooves 72 matching the sealing collar 211 are provided on the inner walls of the upper and lower ends of the sealing pipe 7. When the sealing pipe 7 is connected and moved to the application pipe 26 (return pipe 27) and the connecting pipe of the phosphine gas generating device 3 under the cooperation of the thread, the annular groove 72 can be controlled to move close to the corresponding sealing collar 211, and finally the sealing collar 211 is clamped in the annular groove 72. Through the annular groove 72 and the sealing collar 211, an interference fit is generated between the application pipe 26 (return pipe 27) and the connecting pipe of the phosphine gas generating device 3, ensuring that the pipeline does not fall off, and ensuring the sealing of the connection, avoiding leakage of phosphine gas at the pipeline connection.

[0023] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-tube circulation device outside a grain warehouse, comprising a flat warehouse (1), characterized in that: The invention also comprises a double-tube circulation system (2), a phosphine gas generating device (3) and a gas recovery unit (5), wherein the double-tube circulation system (2) comprises a circulation branch pipe (210) which is laterally connected to two ventilation openings (4) of the bungalow (1), and two circulation main pipes are longitudinally arranged outside the bungalow (1), namely, a circulation main pipe 1 (21) and a circulation main pipe 2 (22), wherein the lower ends of the two circulation main pipes are connected via a circulation fan (23), wherein the upper end of the circulation main pipe 2 (22) is connected to the circulation branch pipe (210), and the upper end of the circulation main pipe 1 (21) is connected to the bungalow (1), and electric wires are arranged on the two circulation main pipes. A movable valve is provided, wherein the front ends of the two circulation main pipes are respectively connected to a drug application pipe (26) and a gas return pipe (27), and the drug application pipe (26) and the gas return pipe (27) can be sealedly connected to the connecting pipe of the phosphine gas generating device (3) through a sealing connecting pipe (7), and a manual valve is installed on the drug application pipe (26) and the gas return pipe (27); the gas recovery unit (5) comprises a recovery pipe (51) connected to the second circulation main pipe (22) and located at the rear end of the electric valve, a filter box (53) and a condenser (54) are sequentially connected to the recovery pipe (51), and the end of the recovery pipe (51) is connected to an external storage tank (56).

2. A double-tube circulation device outside a grain warehouse according to claim 1, characterized in that: The middle position of the sealing connecting pipe (7) is provided as a telescopic pipe section (71), and the inner wall of the sealing connecting pipe (7) is symmetrically provided with internal threads in opposite directions, and the ends of the connecting pipes of the drug application pipe (26), the gas return pipe (27) and the phosphine gas generating device (3) are respectively provided with external threads matching the internal threads in the sealing connecting pipe (7).

3. A double-tube circulation device outside a grain warehouse according to claim 2, characterized in that: The ends of the drug application pipe (26), the gas return pipe (27), and the connecting pipe of the phosphine gas generating device (3) are all fixedly sleeved with sealing rings (211), and the inner walls of the upper and lower ends of the sealing connecting pipe (7) are provided with annular grooves (72) matching the sealing rings (211).

4. A double-tube circulation device outside a grain warehouse according to claim 1, characterized in that: The circulation main pipe 1 (21) is provided with an electric valve 1 (24), the circulation main pipe 2 (22) is provided with an electric valve 2 (25), the drug application pipe (26) is connected to the circulation main pipe 1 (21), and a manual valve 1 (28) is provided on the drug application pipe (26), the return air pipe (27) is connected to the circulation main pipe 2 (22), and a manual valve 2 (29) is provided on the return air pipe (27), and the recovery pipe (51) is provided with an electric valve 3 (52).

5. The double-tube circulation device outside a grain warehouse according to claim 1 is characterized in that: A gas concentration detector (6) is installed on the circulation main pipe 1 (21).

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