Grain storage pipeline system of grain blocking door of squat silo

Abstract

The utility model provides a grain storage pipeline system of a grain blocking door of a squat silo. The grain storage pipeline system comprises a gas main pipeline, a circulation fan, a circulation pipeline and a nitrogen pipeline, and a PLC (Programmable Logic Controller) control unit is electrically connected with a temperature sensor, a humidity sensor, a nitrogen concentration sensor, a phosphine gas detector, the circulation fan, a first electric valve and a second electric valve respectively. When the temperature sensor and the humidity sensor detect that the temperature and the humidity of the grain blocking door are too high, high-temperature and high-humidity gas is exhausted out of the squat silo through the circulating fan; when the nitrogen concentration sensor detects that the nitrogen concentration of the grain blocking door is too low, the nitrogen concentration in the squat silo is discharged out of the squat silo through the gas main pipeline, and then the nitrogen is supplemented into the squat silo again through the nitrogen pipeline; in the fumigation period of the warehouse, when the phosphine gas detector detects that the concentration of the phosphine gas at the grain blocking door is too low, the low-concentration phosphine gas is pumped out through the circulation fan and led to the grain pile through the circulation pipeline, and the high-concentration phosphine gas in the grain pile flows back to the grain blocking door.

Description

Technical Field

[0001] The utility model relates to the technical field of grain storage equipment, in particular to a grain storage pipeline system of a shallow circular silo grain retaining door. Background Art

[0002] Maintaining a certain amount of grain reserves is of great significance to ensuring the basic balance between food supply and demand and coping with various emergencies.

[0003] Granaries are indispensable tools for storing grain. Grain is a living organism. Due to the rotation cycle of reserve grain, grain is generally stored for a long time. However, during the use of the granary, the grain at the grain-blocking door has the following main problems: 1. Affected by the external climate for a long time, due to the large temperature difference between the external air temperature and the temperature inside the silo, the moisture temperature of the grain at the grain-blocking door is relatively high, which is prone to local grain spoilage or mildew, thus affecting the quality of the stored grain; 2. Since the grain-blocking door is in a state of high temperature and high humidity, the air tightness is poor, and the gas conditioning or fumigation methods used in the existing technology have a low insecticide rate, which is easy to cause pests to gather; 3. During the fumigation of the warehouse, when the concentration at the grain-blocking door is low, the fumigation is uneven and the insecticide efficiency is low. Therefore, there is an urgent need for a shallow circular silo grain-blocking door grain storage pipeline system. Utility Model Content

[0004] The utility model provides a grain storage pipeline system for a shallow circular silo grain retaining door, so as to solve the problem that grains become mildewed due to the large temperature difference between the outside air and the temperature inside the silo at the existing grain retaining door, and the grain retaining door is in a high temperature and high humidity state, which easily causes the gathering of pests and other problems.

[0005] The utility model adopts the following technical solutions:

[0006] A grain storage pipeline system for a shallow silo grain retaining door comprises a gas main pipeline, a circulating fan, a circulating pipeline, a nitrogen pipeline, a temperature sensor, a humidity sensor, a nitrogen concentration sensor, a phosphine gas detector and a PLC control unit. A ventilation pipe communicating with the interior of the shallow silo is installed on the inner side of the grain retaining door of the shallow silo, a circulating fan is installed on the gas main pipeline, one end of the gas main pipeline is connected to the ventilation pipe through a bendable connecting branch pipe, and the other end is communicated with the outside atmosphere and is provided with a first electric valve. The gas main pipeline is also respectively connected with a circulating pipeline and a nitrogen pipeline, the other end of the circulating pipeline is connected to the grain surface inside the shallow silo, and a second electric valve is provided on the nitrogen pipeline; a temperature sensor, a humidity sensor, a nitrogen concentration sensor and a phosphine gas detector are installed at the grain retaining door, and the PLC control unit is respectively electrically connected to the temperature sensor, the humidity sensor, the nitrogen concentration sensor, the phosphine gas detector, the circulating fan, the first electric valve and the second electric valve.

[0007] Furthermore, the grain-blocking door comprises a left door leaf and a right door leaf forming a double-door structure, and the left door leaf and the right door leaf are respectively connected to a group of shallow circular silo grain-blocking door grain storage pipeline systems.

[0008] Furthermore, the left door leaf and the right door leaf are respectively composed of at least two short door leaf sections connected up and down, a ventilation pipe is respectively installed on each short door leaf section, and each ventilation pipe is connected to the gas main pipeline through a connecting branch pipe.

[0009] Furthermore, one end of the nitrogen pipeline is connected to the gas main pipeline, and the other end is connected to the nitrogen generator unit.

[0010] Furthermore, each ventilation pipe is made of PVC material and has a plurality of air holes evenly arranged.

[0011] Furthermore, the temperature sensor and the humidity sensor are integrated on the temperature and water measuring cable, and the temperature and water measuring cable is installed on the inner side of the grain retaining door of the shallow cylindrical silo.

[0012] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages: the utility model includes a gas main pipeline, a circulating fan, a circulating pipeline, a nitrogen pipeline, a temperature sensor, a humidity sensor, a nitrogen concentration sensor, a phosphine gas detector and a PLC control unit. When the temperature sensor and the humidity sensor detect that the temperature and humidity of the grain-blocking door are too high, the PLC control unit controls the circulating fan to discharge the high-temperature and high-humidity gas from the gas main pipeline to the outside of the shallow circular silo, which can effectively control the temperature and humidity in the silo, reduce the temperature and humidity at this position, reduce the temperature difference between the inside and outside of the grain pile, and eliminate the mildew of the grain. Quality phenomenon is achieved to achieve the purpose of maintaining quality and increasing efficiency; when the nitrogen concentration sensor detects that the nitrogen concentration is too low, the nitrogen concentration in the shallow silo is discharged from the gas main pipeline to the outside of the shallow silo, and then the nitrogen concentration is re-supplemented to the grain retaining door through the nitrogen pipeline to increase the nitrogen concentration there, which can effectively solve the problem of insect infection and aggregation of pests in this part; during the fumigation of the warehouse, when the phosphine gas detector detects that the phosphine gas concentration is too low, the circulating fan extracts the phosphine gas at the grain retaining door and leads it to the grain pile through the circulating pipeline, and the higher concentration of phosphine gas in the grain pile flows back to the grain retaining door, realizing the effect of circulating balanced gas and improving the fumigation and insecticide efficiency there. The utility model has the characteristics of low investment, quick effect and simple operation, and is a green and energy-saving grain storage pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the grain storage pipeline system of the grain retaining door of the utility model.

[0014] Figure 2 This is a control principle block diagram of the PLC control unit of the utility model. DETAILED DESCRIPTION

[0015] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0016] Reference Figure 1-Figure 2 The utility model provides a shallow silo grain-blocking door grain storage pipeline system, including a gas main pipeline 101, a circulating fan 103, a circulating pipeline 104, a nitrogen pipeline 110, a temperature sensor 108, a humidity sensor 109, a nitrogen concentration sensor 110, a phosphine gas detector 113 and a PLC control unit. A ventilation pipe 102 communicating with the inside of the shallow silo is installed on the inner side of the shallow silo grain-blocking door 20. The grain-blocking door 20 includes a left door leaf 201 and a right door leaf 202 forming a double-door structure, and the left door leaf 201 and the right door leaf 202 are respectively connected to a set of shallow silo grain-blocking door grain storage pipeline system.

[0017] Continue to refer to Figure 1 Preferably, the left door leaf 201 is composed of three short door leaves connected up and down, and the right door leaf 202 is composed of three short door leaves connected up and down, and each short door leaf is respectively installed with a ventilation pipe 102. Specifically, the ventilation pipe 102 is made of PVC material and a number of air holes 114 are evenly arranged on the ventilation pipe 102. Each ventilation pipe 102 is respectively connected to the gas main pipeline 101 through a connecting branch pipe 107, and the connecting branch pipe 107 is preferably a bendable hose.

[0018] Continue to refer to Figure 1 A circulation fan 103 is installed on the above-mentioned gas main pipeline 101. One end of the gas main pipeline 101 is connected to the ventilation pipe 102 through a connecting branch pipe 107, and the other end is connected to the outside atmosphere and is provided with a first electric valve 105. A temperature and water measuring cable 115 is also installed on the inner side of the grain blocking door 20 of the shallow circular silo. The temperature and water measuring cable 115 is integrated with a temperature sensor 108 and a humidity sensor 109. The temperature sensor 108, the humidity sensor 109, the circulation fan 103, the first electric valve 105 and the PLC control unit are electrically connected.

[0019] The specific values ​​of the temperature sensor 108 and the humidity sensor 109 are set in the PLC control unit. When the temperature sensor 108 and the humidity sensor 109 detect that the temperature and humidity of the grain retaining door 20 are higher than the set values, the PLC control unit controls the circulation fan 103 to extract the high-temperature and high-humidity gas from the ventilation pipe 102, the connecting branch pipe 107, and the gas main pipe 101 to the outside of the shallow circular silo, which can effectively control the temperature and humidity in the shallow circular silo, reduce the temperature and humidity at this position, reduce the temperature difference between the inside and outside of the grain pile, eliminate the phenomenon of grain mold and deterioration, and achieve the purpose of maintaining quality and increasing efficiency.

[0020] Continue to refer to Figure 1-Figure 2The above-mentioned gas main pipeline 102 is also connected to a nitrogen pipeline 111, and a second electric valve 106 is provided on the nitrogen pipeline 111; one end of the nitrogen pipeline 111 is connected to the gas main pipeline 102, and the other end is connected to a nitrogen making unit 112. A nitrogen concentration sensor 110 is also installed on the inner side of the grain blocking door 20, and the PLC control unit is electrically connected to the nitrogen concentration sensor 110 and the second electric valve 106.

[0021] The specific value of the nitrogen concentration sensor 110 is set in the PLC control unit. When the nitrogen concentration sensor 110 detects that the nitrogen concentration at the grain retaining door 20 is lower than the set value, the PLC control unit controls the circulation fan 103 to operate, and the nitrogen at the grain retaining door 20 is extracted through the ventilation pipe 102, the connecting branch pipe 107, and the gas main pipeline 101 to the outside of the shallow silo, and then the second electric valve 106 is controlled to open by the PLC control unit, and the nitrogen making unit 112 replenishes nitrogen to the grain retaining door 20 through the nitrogen pipeline 111, the gas main pipeline 101, the connecting branch pipe 107 and the ventilation pipe 102, so as to increase the nitrogen concentration there, which can effectively solve the problem of insect infection and accumulation at this part.

[0022] Continue to refer to Figure 1-Figure 2 One end of the circulation pipe 104 is connected to the gas main pipe 101, and the other end is connected to the grain surface inside the shallow cylindrical silo. A phosphine gas detector 113 is also provided on the inner side of the grain blocking door 20 of the shallow cylindrical silo, and the phosphine gas detector 113 is electrically connected to the PLC control unit.

[0023] The specific value of the phosphine gas detector 113 is set in the PLC control unit. During the fumigation of the warehouse, when the phosphine gas detector 113 detects that the phosphine gas concentration at the grain retaining door 20 is lower than the set value, the PLC control unit controls the circulating fan 103 to extract the low-concentration phosphine gas at this location through the ventilation pipe 102, the connecting branch pipe 107, and the gas main pipeline 101, and leads it to the grain pile through the circulating pipeline 104, while the higher-concentration phosphine gas in the grain pile flows back to the grain retaining door 20, thereby realizing the circulating balanced gas effect, improving the fumigation and insecticide efficiency at this location, and inhibiting the growth of harmful bacteria.

[0024] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A grain storage pipeline system for a shallow silo grain retaining door, characterized in that: It includes a gas main pipeline, a circulating fan, a circulating pipeline, a nitrogen pipeline, a temperature sensor, a humidity sensor, a nitrogen concentration sensor, a phosphine gas detector and a PLC control unit. A ventilation pipe connected to the inside of the shallow silo is installed on the inner side of the grain retaining door of the shallow silo. The circulating fan is installed on the gas main pipeline. One end of the gas main pipeline is connected to the ventilation pipe through a bendable connecting branch pipe, and the other end is connected to the outside atmosphere and is provided with a first electric valve. The circulating pipeline and the nitrogen pipeline are also connected to the gas main pipeline respectively. The other end of the circulating pipeline is connected to the grain surface inside the shallow silo, and the nitrogen pipeline is provided with a second electric valve; the temperature sensor, the humidity sensor, the nitrogen concentration sensor and the phosphine gas detector are installed at the grain retaining door, and the PLC control unit is electrically connected to the temperature sensor, the humidity sensor, the nitrogen concentration sensor, the phosphine gas detector, the circulating fan, the first electric valve and the second electric valve respectively.

2. A grain storage pipeline system for a shallow silo grain retaining door according to claim 1, characterized in that: The grain-blocking door comprises a left door leaf and a right door leaf forming a double-door structure, and the left door leaf and the right door leaf are respectively connected to a group of grain storage pipeline systems of the shallow circular silo grain-blocking door.

3. A grain storage pipeline system for a shallow silo grain retaining door according to claim 2, characterized in that: The left door leaf and the right door leaf are respectively composed of at least two short door leaf sections connected up and down, and one ventilation pipe is respectively installed on each short door leaf section, and each ventilation pipe is respectively connected to the gas main pipeline through a connecting branch pipe.

4. A grain storage pipeline system for a shallow silo grain retaining door according to claim 1, characterized in that: One end of the nitrogen pipeline is connected to the gas main pipeline, and the other end is connected to a nitrogen generator.

5. The grain storage pipeline system for a shallow silo grain retaining door according to claim 1, characterized in that: Each of the ventilation pipes is made of PVC material and has a plurality of air holes evenly arranged.

6. A grain storage pipeline system for a shallow silo grain retaining door according to claim 1, characterized in that: The temperature sensor and the humidity sensor are integrated on a temperature and water measuring cable, and the temperature and water measuring cable is installed on the inner side of the grain retaining door of the shallow cylindrical silo.

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