Internal circulation type granary insect killing device

Abstract

The utility model belongs to the technical field of grain storage, and particularly relates to an inner circulation type granary insect killing device which comprises a wall body, a second granary outer circulation main pipe and a first granary outer circulation main pipe penetrate through the wall body, and the first granary outer circulation main pipe is located on one side of the lower portion of the second granary outer circulation main pipe. The upper end of the first bin outer circulation main pipe is arranged on the inner side of a wall, a nitrogen inlet is formed in the lower end of the first bin outer circulation main pipe, and a first electric valve is arranged on the portion, above the nitrogen inlet, of the first bin outer circulation main pipe. The circulation equipment has the beneficial effects that a closed loop for internal circulation of nitrogen is formed by the first outside-granary circulation main pipe, the second outside-granary circulation main pipe, the second inside-granary circulation branch pipe, the first inside-granary circulation branch pipe and the gas distribution component, so that the number of circulation pipelines outside the granary is reduced, and the structure of the whole circulation equipment is optimized; and the granary is integrally displayed in order.

Description

Technical Field

[0001] The utility model belongs to the technical field of grain storage, in particular to an inner circulation type grain bin insecticide device. Background Art

[0002] Nitrogen grain storage technology has the excellent storage characteristics of dual effects of insecticide and preservation. This excellent characteristic is an advantage that all currently known grain storage chemical agents and technologies do not have, and has attracted widespread attention from delegates from all over the world. The green nitrogen-filled grain storage technology has played a revolutionary role in the world's green grain storage and will have a significant and far-reaching impact on other warehousing industries.

[0003] The utility model patent with announcement number CN108294107B discloses a transverse circulation type grain silo insecticide system, including a first wall and a second wall arranged relatively to each other, and also including a first return air duct, a first air inlet duct, a second return air duct and a circulation fan, so that the interior of the grain silo is filled with nitrogen to facilitate sterilization and insecticide, and to achieve mildew inhibition and preservation of the grain pile. Although the patent improves the uniformity of nitrogen filling and reduces the waste of nitrogen to a certain extent, the patent as a whole still has the problem of poor nitrogen filling uniformity, and the insecticide effect is general. Moreover, the patent has too many circulation ducts outside the silo, and there are certain limitations in the rationality of the overall structure. Utility Model Content

[0004] The purpose of the utility model is to provide an internal circulation type grain bin insecticide device in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] An internal circulation type grain silo insecticide device comprises a wall, wherein a second external circulation main pipe and a first external circulation main pipe respectively pass through the wall, the first external circulation main pipe is located on one side of the lower part of the second external circulation main pipe, the upper end of the first external circulation main pipe is arranged on the inner side of the wall, the lower end of the first external circulation main pipe is arranged with a nitrogen inlet, and a first electric valve is arranged on the first external circulation main pipe above the nitrogen inlet;

[0007] The first external circulation main pipe above the first electric valve is connected to the second external circulation main pipe through a connecting assembly, an exhaust assembly is arranged on the second external circulation main pipe above the connecting assembly, the upper end of the first external circulation main pipe is connected to the second internal circulation branch pipe arranged on the inner side of the wall, the two sides of the second internal circulation branch pipe are respectively connected to the gas distribution assembly through the first internal circulation branch pipe, the gas distribution assembly includes a gas distribution box connected to the first internal circulation branch pipe, the gas distribution box is connected to a multi-channel ventilation cage arranged in the granary, the ventilation cage is arranged to be an arch structure, and a plurality of bridge-type holes are arranged on the back of the ventilation cage.

[0008] Preferably, the connecting assembly includes a connecting pipe, both ends of which are respectively connected to the second warehouse external circulation main pipe and the first warehouse external circulation main pipe, a third electric valve is arranged on the connecting pipe close to the first warehouse external circulation main pipe, a special circulation fan is arranged close to the second warehouse external circulation main pipe, and a detection component is arranged on the connecting pipe between the special circulation fan and the third electric valve.

[0009] Preferably, the detection component includes a ventilation pipe connected to the connecting pipe, a first manual ball valve is provided on the ventilation pipe, a nitrogen concentration detection port is provided at the bottom of the first manual ball valve, and a second manual ball valve is provided on the ventilation pipe below the first manual ball valve.

[0010] Preferably, the exhaust assembly comprises an exhaust pipe connected to the second bin outer circulation main pipe, and a second electric valve is provided on the exhaust pipe.

[0011] Preferably, one side of the gas distribution box is arranged outside the wall and is provided with a vent, and the other side of the gas distribution box is arranged inside the wall and communicated with the ventilation cage.

[0012] The beneficial effect is that the utility model forms a closed loop for internal circulation of nitrogen through the first warehouse external circulation main pipe, the second warehouse external circulation main pipe, the second warehouse internal circulation branch pipe, the first warehouse internal circulation branch pipe and the gas distribution component, so that the circulation pipeline outside the granary is reduced, the structure of the overall circulation equipment is optimized, and the overall display of the granary is regular. At the same time, the setting of the gas distribution component allows the nitrogen gas to enter the warehouse internal circulation branch pipe through the warehouse external circulation main pipe, and the warehouse internal circulation branch pipe enters the multi-channel ventilation cage. The nitrogen diffuses into the interior of the grain pile through the multi-channel ventilation cage, so that the nitrogen covers the entire granary during the nitrogen filling process, further improves the uniformity of nitrogen filling, and keeps the nitrogen concentration in the granary at a stable value, which has a better insecticidal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a structural schematic diagram of an inner circulation type grain bin insecticide device described in the utility model;

[0015] Figure 2 It is a partial structural schematic diagram of an inner circulation type grain bin insecticide device described in the utility model;

[0016] Figure 3 It is an enlarged view of point A of an inner circulation type grain bin insecticide device described in the utility model.

[0017] The following are the descriptions of the reference numerals:

[0018] 1. Wall; 2. Circulation main pipe outside the second warehouse; 21. Circulation main pipe outside the first warehouse; 211. First electric valve; 3. Circulation branch pipe inside the first warehouse; 31. Circulation branch pipe inside the second warehouse; 4. Special circulation fan; 5. Nitrogen inlet; 6. Gas distribution box; 61. Ventilation port; 7. Ventilation cage; 8. Exhaust pipe; 81. Second electric valve; 9. Connecting pipe; 91. Third electric valve; 10. Ventilation pipe; 101. First manual ball valve; 102. Nitrogen concentration detection port; 103. Second manual ball valve. DETAILED DESCRIPTION

[0019] The following is a further explanation of the technical solution of the utility model in conjunction with the accompanying drawings:

[0020] like Figure 1-Figure 3 As shown, an internal circulation type grain silo insecticide device includes a wall 1, the inner side of the wall 1 is a grain silo, a second warehouse outer circulation main pipe 2 and a first warehouse outer circulation main pipe 21 pass through the wall 1 respectively, the first warehouse outer circulation main pipe 21 is located on the lower side of the second warehouse outer circulation main pipe 2, the upper end of the first warehouse outer circulation main pipe 21 is arranged on the inner side of the wall 1 and communicates with the grain silo, a nitrogen inlet 5 is arranged at the lower end of the first warehouse outer circulation main pipe 21, the nitrogen inlet 5 is connected to a nitrogen making device, a first electric valve 211 is fixed on the first warehouse outer circulation main pipe 21 above the nitrogen inlet 5, and the first electric valve 211 can control the entry of nitrogen, and the black triangle in the figure represents the direction of the gas.

[0021] The first external circulation main pipe 21 above the first electric valve 211 is connected to the second external circulation main pipe 2 through a connecting assembly. An exhaust assembly is arranged on the second external circulation main pipe 2 above the connecting assembly. The exhaust assembly includes an exhaust pipe 8 connected to the second external circulation main pipe 2. A second electric valve 81 is fixedly installed on the exhaust pipe 8. The upper end of the first external circulation main pipe 21 is connected to the second internal circulation branch pipe 31 arranged on the inner side of the wall 1. The second internal circulation branch pipe 31 is horizontally arranged inside the granary. The first internal circulation branch pipe 3 is vertically connected to the two sides of the second internal circulation branch pipe 31 respectively. The first internal circulation branch pipe 3 is connected to the gas distribution assembly.

[0022] The gas distribution assembly includes a gas distribution box 6 connected to the circulation branch pipe 3 in the first bin. The gas distribution box 6 is connected to a multi-channel ventilation cage 7 arranged in the granary. The ventilation cage 7 is arranged in an arched structure. A plurality of bridge holes are arranged on the back of the ventilation cage 7. The diameter of the bridge holes is small, and the wheat in the granary will not leak into the bridge holes. One side of the gas distribution box 6 is arranged on the outside of the wall 1, and a vent 61 is arranged on this side. The other side of the gas distribution box 6 is arranged inside the wall 1 and is connected to the ventilation cage 7. The ventilation cage 7 can allow nitrogen gas to evenly enter the interior of the grain pile.

[0023] The connecting component includes a connecting pipe 9, the two ends of which are respectively connected to the second warehouse external circulation main pipe 2 and the first warehouse external circulation main pipe 21, a third electric valve 91 is arranged on the connecting pipe 9 close to the first warehouse external circulation main pipe 21, a special circulation fan 4 is arranged close to the second warehouse external circulation main pipe 2, the special circulation fan 4 is connected to the fan bracket, the fan bracket is fixed on the warehouse external wall 1, the air inlet and the air outlet of the special circulation fan 4 are connected to the second warehouse external circulation main pipe 2, a detection component is arranged on the connecting pipe 9 between the special circulation fan 4 and the third electric valve 91, and the third electric valve 91 can control the air outlet state of the special circulation fan 4.

[0024] The detection component includes a ventilation pipe 10 connected to the connecting pipe 9, a first manual ball valve 101 is fixedly installed on the ventilation pipe 10, a nitrogen concentration detection port 102 is arranged at the bottom of the first manual ball valve 101, the nitrogen concentration detection port 102 is connected to a dedicated nitrogen concentration detector to detect the concentration of nitrogen gas discharged from the detection chamber, and a second manual ball valve 103 is fixedly installed on the ventilation pipe 10 below the first manual ball valve 101.

[0025] The dedicated circulation fan 4 is a small centrifugal fan with a wind pressure of ≤1000pa and an air volume of ≤1000m3 / h. This dedicated circulation fan 4 is a centrifugal fan for granary circulation fumigation, which has been tested and studied by domestic storage industry experts. It can also be used in nitrogen insecticide systems. During the nitrogen filling stage, the dedicated circulation fan 4 can be used as a strong exhaust fan, and the original air in the warehouse is extracted through the second warehouse outer circulation main pipe 2 and the second manual ball valve 103. When the nitrogen distribution in the granary is uneven, the dedicated circulation fan 4 can be started to quickly and evenly distribute the nitrogen in the warehouse and the grain pile, effectively improving the ventilation efficiency and ensuring the nitrogen filling effect.

[0026] Working principle: A first electric valve 211 and a nitrogen interface are provided on the second warehouse outer circulation main pipe 2, and the nitrogen interface is connected to the gas outlet of the nitrogen production equipment or the nitrogen transmission pipeline. The first electric valve 211 is opened, and the second electric valve 81 and the third electric valve 91 are closed at the same time, the dedicated circulation fan 4 is turned on, the first manual ball valve 101 is closed, and the second manual ball valve 103 and the vent 61 are opened.

[0027] Start the nitrogen production equipment, which has the transport capacity. Nitrogen enters the warehouse through the circulation main pipe 21 outside the first warehouse, flows through the circulation branch pipe 3 inside the first warehouse and the circulation branch pipe 31 inside the second warehouse, and passes through multiple gas distribution boxes 6 and multiple ventilation cages 7. The nitrogen gas is pressed out of the ventilation cage 7 by the pipeline pressure and diffused into the grain pile.

[0028] In the early stage of nitrogen filling, since the nitrogen concentration in the granary is relatively low, the special circulation fan 4 can be turned on. Through the exhaust of the special circulation fan 4, the air in the granary is passed through the second external circulation main pipe 2 and the first manual ball valve 101 to quickly discharge the air in the granary to the outside of the granary. In this way, the gas concentration of nitrogen in the granary can be accelerated.

[0029] When the system is working, the nitrogen concentration detection interface is connected to the nitrogen concentration detector, and the first manual ball valve 101 is opened to detect the nitrogen gas concentration discharged from the warehouse. When the nitrogen gas concentration reaches 90%, the dedicated circulation fan 4 and the second manual ball valve 103 are closed, and the second electric valve 81 is opened to discharge the gas naturally through the exhaust pipe 8. Exhausting in this way can effectively reduce the rapid discharge of nitrogen in the granary and avoid a large amount of nitrogen waste.

[0030] During the operation of the system, it is necessary to detect the concentration of nitrogen gas discharged from the granary all the time. When the concentration of nitrogen gas in the granary reaches the required value of 99%, the nitrogen production equipment is turned off, the gas supply is stopped, and the first electric valve 211 and the second electric valve 81 are closed. The third electric valve 91 is opened, and the special circulation fan 4 is turned on. The gas inside the granary passes through the second warehouse outer circulation main pipe 2, the special circulation fan 4, the third electric valve 91, the first warehouse outer circulation main pipe 21, the first warehouse inner circulation branch pipe 3, the second warehouse inner circulation branch pipe 31, the gas distribution box 6, and the ventilation cage 7 in sequence, and enters the grain pile. After a period of circulation, the nitrogen gas circulates through this path, and the nitrogen concentration in various parts of the grain pile can reach a more uniform state. At this time, the oxygen concentration inside the grain pile is almost zero, which has a better insecticidal effect on the pests inside the grain pile due to lack of oxygen.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An internal circulation type grain silo insecticide device, comprising a wall (1), wherein a second external circulation main pipe (2) and a first external circulation main pipe (21) respectively pass through the wall (1), wherein the first external circulation main pipe (21) is located on one side of the lower part of the second external circulation main pipe (2), wherein the upper end of the first external circulation main pipe (21) is arranged on the inner side of the wall (1), and a nitrogen inlet (5) is arranged at the lower end of the first external circulation main pipe (21), and a first electric valve (211) is arranged on the first external circulation main pipe (21) above the nitrogen inlet (5), wherein: The first external circulation main pipe (21) above the first electric valve (211) is connected to the second external circulation main pipe (2) via a connecting assembly, an exhaust assembly is provided on the second external circulation main pipe (2) above the connecting assembly, and the upper end of the first external circulation main pipe (21) is connected to the second internal circulation branch pipe (31) provided on the inner side of the wall (1); Both sides of the second in-bin circulation branch pipe (31) are connected to the gas distribution assembly through the first in-bin circulation branch pipe (3), respectively. The gas distribution assembly comprises a gas distribution box (6) connected to the first in-bin circulation branch pipe (3), and the gas distribution box (6) is connected to a multi-channel ventilation cage (7) arranged in the granary. The ventilation cage (7) is arranged in an arched structure, and a plurality of bridge-type holes are arranged on the back of the ventilation cage (7).

2. The internal circulation type grain bin insecticide device according to claim 1, characterized in that: The connection assembly comprises a connection pipe (9), the two ends of which are respectively connected to the second warehouse external circulation main pipe (2) and the first warehouse external circulation main pipe (21); a third electric valve (91) is arranged on the connection pipe (9) close to the first warehouse external circulation main pipe (21); a dedicated circulation fan (4) is arranged close to the second warehouse external circulation main pipe (2); and a detection component is arranged on the connection pipe (9) between the dedicated circulation fan (4) and the third electric valve (91).

3. The internal circulation type grain bin insecticide device according to claim 2, characterized in that: The detection component comprises a ventilation pipe (10) connected to the connecting pipe (9); a first manual ball valve (101) is arranged on the ventilation pipe (10); a nitrogen concentration detection port (102) is arranged at the bottom of the first manual ball valve (101); and a second manual ball valve (103) is arranged on the ventilation pipe (10) below the first manual ball valve (101).

4. The internal circulation type grain bin insecticide device according to claim 1, characterized in that: The exhaust assembly comprises an exhaust pipe (8) connected to the second outer chamber circulation main pipe (2), and a second electric valve (81) is arranged on the exhaust pipe (8).

5. The internal circulation type grain bin insecticide device according to claim 1, characterized in that: One side of the gas distribution box (6) is arranged outside the wall (1) and is provided with a ventilation opening (61), and the other side of the gas distribution box (6) is arranged inside the wall (1) and is connected to the ventilation cage (7).

Images