Multifunctional air intake and exhaust device of grain storage silo

Abstract

The utility model discloses a multifunctional air intake and exhaust device of a grain storage silo, which relates to the technical field of air intake and exhaust of a granary and comprises a ventilation series pipe, a carbon dioxide pipe is fixedly connected to one side, close to the inner wall of the granary, of the ventilation series pipe, and a carbon dioxide inlet is fixedly connected to the bottom end of the carbon dioxide pipe. A nitrogen inlet is formed in the side face of the carbon dioxide inlet, and the carbon dioxide inlet and the nitrogen inlet are used for feeding carbon dioxide and nitrogen correspondingly. The utility model has the main advantages that: through the carbon dioxide pipe, the nitrogen pipe, the spherical valve and the communicating pipe, the nitrogen up-filling and down-discharging process and the carbon dioxide down-filling and up-discharging process can be met, the circulation of the whole bin can also be met, the secondary input caused by technical replacement can be effectively avoided, and the standard production, installation and use level can be reached.

Description

Technical Field

[0001] The utility model relates to the technical field of grain silo air inlet and exhaust, in particular to a multifunctional air inlet and exhaust device for a grain storage silo. Background Technique

[0002] As an advanced grain storage method, green grain storage aims to maintain the quality and nutrition of grains through scientific means and reduce grain losses during storage. In the warehouse facilities for green grain storage, the air inlet and exhaust pipes are an indispensable part, which play a key role in regulating the temperature and humidity inside the silo and maintaining a suitable storage environment for grains. Due to the different air inlet and exhaust processes for nitrogen gas conditioning and carbon dioxide gas conditioning in grain storage, the technical requirements for pipeline facilities are also different.

[0003] Most existing grain storage is in large-diameter silo-type warehouses. During the construction of new warehouses, designers mostly design according to a single gas conditioning function. Once the grain depot needs to carry out technical replacement due to actual needs, the configured circulation system cannot meet the requirements and must be transformed. The cost for a single silo is about 30,000 - 50,000 yuan, which will cause unnecessary waste of funds and also affect the use of gas conditioning technology.

[0004] In the above-mentioned solution, there is a problem that the circulation system cannot meet the storage requirements. By setting up a series pipeline for carbon dioxide and nitrogen and installing multiple valves at key positions of the pipeline for control, it can not only meet the processes such as nitrogen charging from top to bottom, carbon dioxide charging from bottom to top, and sulfuryl fluoride spraying outside the silo, but also meet the whole-silo circulation, effectively avoiding the secondary investment required due to technical replacement.

[0005] However, during the use of the above-mentioned circulation system, since most grain silos exchange air through ventilation openings, in order to prevent the grains inside the silo from being polluted, a filter screen is mostly fixedly installed at the ventilation opening, which will cause the ventilation net to be not easy to replace. The filter screen is not easy to replace and is prone to accumulate dust and impurities after long-term use, resulting in the blockage of the filter screen. The blocked filter screen will hinder air circulation and reduce the ventilation efficiency, thereby affecting the air quality and temperature and humidity control inside the grain silo. Content of the Utility Model

[0006] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a multifunctional air inlet and exhaust device for a grain storage silo, whose main advantage is that it can control the intake of carbon dioxide and nitrogen inside the grain silo.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A multifunctional air inlet and exhaust device for a grain storage silo, including a ventilation series pipe. One side of the ventilation series pipe close to the inner wall of the granary is fixedly connected with a carbon dioxide pipe. The bottom end of the carbon dioxide pipe is fixedly connected with a carbon dioxide inlet. A nitrogen inlet is arranged on the side of the carbon dioxide inlet. The carbon dioxide inlet and the nitrogen inlet are respectively used to allow carbon dioxide and nitrogen to enter. Thus, it can meet the requirements of upper charging and lower discharging of nitrogen and lower charging and upper discharging of carbon dioxide, and can also meet the whole-bin circulation, so as to avoid the secondary investment caused by technical replacement.

[0009] As a further improvement of the present utility model, a connecting pipe is fixedly connected to the side of the ventilation series pipe. One end of the connecting pipe far from the carbon dioxide pipe is fixedly connected with a nitrogen pipe. Two spherical valves are arranged on the outer surface of the nitrogen pipe. Thus, the smoothness and closure of each position of the pipeline can be controlled.

[0010] As a further improvement of the present utility model, a total of five spherical valves are provided. The other three spherical valves are respectively arranged at the upper and lower ends of the carbon dioxide pipe and on the outer surface of the connecting pipe. A second connecting pipe is fixedly connected to the side of the carbon dioxide pipe far from the connecting pipe. Thus, the air in each pipeline can be guided by a ring fan.

[0011] As a further improvement of the present utility model, a ring fan is fixedly connected to the side of the second connecting pipe far from the carbon dioxide pipe. A first connecting pipe is fixedly connected to the side of the spherical valve close to the inner wall of the granary. One end of the first connecting pipe far from the nitrogen pipe is fixedly connected to the side of the ring fan. Thus, the transmission of wind force can be controlled.

[0012] As a further improvement of the present utility model, ventilation openings are fixedly connected to both ends of the ventilation series pipe. A return air opening is fixedly connected to the bottom end of the nitrogen pipe. Threaded grooves are respectively formed inside the ventilation openings and the return air opening. Threaded pipes are respectively threadedly connected inside the threaded grooves. Thus, the threaded pipes can be disassembled conveniently.

[0013] As a further improvement of the present utility model, protection pipes are fixedly connected to the sides of the threaded pipes far from the ventilation openings. Filter devices are fixedly connected inside the protection pipes. A return air pipe is fixedly connected to the side of the return air opening far from the protection pipe. Thus, dust and impurities are prevented from entering the ventilation openings and the return air openings.

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

[0015] 1. Through the carbon dioxide pipe, nitrogen pipe, ball valve and connecting pipe, the connection between the carbon dioxide pipe, nitrogen pipe and connecting pipe is controlled by multiple ball valves. When nitrogen is regulated, it is filled up and discharged down. Air is taken in through the nitrogen inlet on the right side, and the ball valve on this side is opened to achieve the upper filling and lower discharge of nitrogen. When carbon dioxide is regulated, it is filled down and discharged up. Air is taken in through the carbon dioxide inlet on the left side, and the ball valve on this side is opened to achieve the lower filling and upper discharge of carbon dioxide. This will meet the nitrogen upper filling and lower discharge and carbon dioxide lower filling and upper discharge processes, and can also meet the circulation of the whole warehouse, which can effectively avoid the secondary investment caused by the technical replacement, and has reached the level of standardized production, installation and use. The injection of nitrogen and carbon dioxide can reduce the respiration intensity of grain and delay the aging process of grain. The controllable conversion mechanism allows the flexible selection of the injection method of nitrogen or carbon dioxide according to factors such as the type and state of grain in the granary and external environmental conditions. This flexibility helps to optimize resource utilization and ensure that each gas can play its maximum effect under the most appropriate circumstances.

[0016] 2. Through the threaded groove, threaded tube, protective tube and filter device, the threaded connection of the threaded groove and the threaded tube, and the filter device is fixedly connected inside the protective tube fixedly connected to the side of the threaded tube, so that the filter device can be portable and quickly replaced. The portable and quick replacement design makes the replacement process of the filter device simpler and faster, reducing the working time and labor intensity of maintenance personnel. When it is necessary to clean or replace the filter device, the operation can be completed quickly, thereby shortening the time when the granary is suspended for maintenance and ensuring the normal operation of the granary. In addition, the vents of the granary are important channels for outside air to enter the granary, but they are also ways for harmful substances such as pests, dust, and bacteria to invade. The portable and quick-replacement filter device can more effectively block these harmful substances, maintain the cleanliness of the internal environment of the granary, reduce the risk of grain contamination, and thus ensure the safety and quality of grain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the thread groove, threaded tube and filtering device in the utility model.

[0019] Figure 3 For this utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0020] In the figure: 101, ventilation series pipe; 102, carbon dioxide pipe; 103, nitrogen pipe; 104, ball valve; 105, connecting pipe one; 106, communicating pipe; 107, connecting pipe two; 108, annular fan; 109, carbon dioxide inlet; 110, nitrogen inlet; 201, ventilation opening; 202, air return opening; 203, thread groove; 204, threaded pipe; 205, protection pipe; 206, filtering device; 207, air return pipe. Specific embodiments

[0021] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following detailed description of the specific embodiments of the present utility model will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0023] As shown in the figure, a multi-functional air inlet and exhaust device for a grain storage silo includes a carbon dioxide pipe 102, a nitrogen pipe 103, a ball valve 104, an annular fan 108, a thread groove 203, and a threaded pipe 204.

[0024] First, this solution is designed according to the conventional design of the bottom 4 ventilation openings 201 of a large-diameter cylindrical silo. The four ventilation openings 201 are symmetrically arranged in pairs at both ends of the two silos and are divided into group A and group B. The operator can control the opening and closing of the ball valves 104 at different positions by starting the annular fan 108 to produce different effects:

[0025] When nitrogen is needed for controlled atmosphere storage to achieve the effect of upper charging and lower discharging, air is introduced through the nitrogen inlet 110 of group A. At the same time, the two ball valves 104 provided on the surface of the nitrogen pipe 103 in this group are opened, so that nitrogen passes through the ventilation series pipe 101, the connecting pipe one 105, the communicating pipe 106, and the connecting pipe two 107, thereby achieving the air intake effect. Then, the ball valve 104 fixedly connected to the carbon dioxide pipe 102 in group B is opened for exhaust, and thus the upper charging and lower discharging of nitrogen will be achieved.

[0026] When it is necessary to achieve the effect of lower charging and upper discharging when using carbon dioxide for controlled atmosphere, the carbon dioxide inlet 109 of Group A intakes air. At the same time, two ball valves 104 provided on the surface of the carbon dioxide pipe 102 of this group are opened, so that carbon dioxide passes through the ventilation series pipe 101, the first connecting pipe 105, the communicating pipe 106 and the second connecting pipe 107, so as to achieve the air intake effect. Then, the ball valve 104 fixedly connected to the nitrogen pipe 103 in Group B is opened for exhaust, thereby achieving the lower charging and upper discharging of carbon dioxide.

[0027] When overall circulation is required, both Group A and Group B open the two sides of the annular fan 108, and open the ball valves 104 at the tops of the carbon dioxide pipes 102 and nitrogen pipes 103 on both sides, so that the air flow in the grain pile descends. Thus, the above various situations can meet the processes of upper charging and lower discharging of nitrogen and lower charging and upper discharging of carbon dioxide, and can also meet the overall bin circulation, effectively avoiding the secondary investment required due to technology replacement, and reaching the level of standardized production, installation and use.

[0028] Furthermore, after the device has been used for a period of time, since the ventilation openings 201 and return air openings 202 of the device are in contact with air for a long time, the filter device 206 fixed to the sides of the ventilation openings 201 and return air openings 202 may be blocked. At this time, it will be necessary to remove and clean or replace the filter device 206. Since the filter device 206 is fixedly connected inside the protection pipe 205, and one side of the protection pipe 205 close to the ventilation opening 201 is fixedly connected with a threaded pipe 204, and the threaded groove 203 opened inside the ventilation opening 201 is threadedly connected with the threaded pipe 204, the operator can quickly and conveniently remove the protection pipe 205 together with the filter device 206. After removal, the filter device 206 can be cleaned or a new one can be replaced at the ventilation openings 201 and return air openings 202. The design of portable and quick replacement makes the replacement process of the filter device 206 simpler and faster, reducing the working time and labor intensity of maintenance personnel. When it is necessary to clean or replace the filter device 206, the operation can be quickly completed, thereby shortening the time when the granary is suspended from use due to maintenance and ensuring the normal operation of the granary.

[0029] The advantages of the present utility model are as follows: 1) It meets the processes of upper charging and lower discharging of nitrogen and lower charging and upper discharging of carbon dioxide, and can also meet the overall bin circulation, effectively avoiding the secondary investment required due to technology replacement, and reaching the level of standardized production, installation and use. 2) The filter device 206 can be replaced portably and quickly, so as to more effectively block these harmful substances, maintain the cleanliness of the internal environment of the granary, reduce the risk of grain contamination, and thus ensure the safety and quality of grain.

[0030] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A multifunctional air inlet and exhaust device for a grain storage silo, comprising a ventilation series pipe (101), characterized in that, One side of the ventilation series pipe (101) close to the inner wall of the granary is fixedly connected with a carbon dioxide pipe (102). The bottom end of the carbon dioxide pipe (102) is fixedly connected with a carbon dioxide inlet (109). A nitrogen inlet (110) is arranged on the side of the carbon dioxide inlet (109). The carbon dioxide inlet (109) and the nitrogen inlet (110) are respectively used for introducing carbon dioxide and nitrogen.

2. The multifunctional air inlet and exhaust device for a grain storage silo according to claim 1, characterized in that, A communicating pipe (106) is fixedly connected to the side of the ventilation series pipe (101). One end of the communicating pipe (106) away from the carbon dioxide pipe (102) is fixedly connected with a nitrogen pipe (103). Two spherical valves (104) are arranged on the outer surface of the nitrogen pipe (103).

3. The multifunctional air inlet and exhaust device for a grain storage silo according to claim 2, characterized in that, A total of five spherical valves (104) are provided. The other three spherical valves (104) are respectively arranged at the upper and lower ends of the carbon dioxide pipe (102) and on the outer surface of the communicating pipe (106). One side of the carbon dioxide pipe (102) away from the communicating pipe (106) is fixedly connected with a second connecting pipe (107).

4. The multifunctional air inlet and exhaust device for a grain storage silo according to claim 3, characterized in that, One side of the second connecting pipe (107) away from the carbon dioxide pipe (102) is fixedly connected with an annular fan (108). One side of the spherical valve (104) close to the inner wall of the granary is fixedly connected with a first connecting pipe (105). One end of the first connecting pipe (105) away from the nitrogen pipe (103) is fixedly connected to the side of the annular fan (108).

5. The multifunctional air inlet and exhaust device for a grain storage silo according to claim 2, characterized in that, Ventilation openings (201) are fixedly connected to both ends of the ventilation series pipe (101). A return air opening (202) is fixedly connected to the bottom end of the nitrogen pipe (103). Threaded grooves (203) are formed inside the ventilation openings (201) and the return air opening (202). Threaded pipes (204) are threadedly connected inside the threaded grooves (203).

6. The multifunctional air inlet and exhaust device for a grain storage silo according to claim 5, characterized in that, One side of the threaded pipe (204) away from the ventilation opening (201) is fixedly connected with a protection pipe (205). A filtering device (206) is fixedly connected inside the protection pipe (205). One side of the return air opening (202) away from the protection pipe (205) is fixedly connected with a return air pipe (207).

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