Grain pile ventilation device

Abstract

A grain pile ventilation device is arranged in a granary and comprises a plurality of ventilation pipes vertically inserted in a grain pile, the upper ends of the ventilation pipes extend to the position above the grain pile, upper ports of the ventilation pipes are communicated through connecting pipes, the connecting pipes are connected with an air blower, a plurality of first ventilation openings are formed in the lower portions of the ventilation pipes, and first filter screens are arranged on the outer sides of the first ventilation openings. The mesh opening is smaller than the minimum size of grains in a grain pile; the ventilation pipe comprises an upper air pipe and a lower air pipe which are coaxially arranged up and down, the lower portion of the upper air pipe is inserted into the upper portion of the lower air pipe and can slide up and down, and the first ventilation opening is formed in the lower portion of the lower air pipe. The overall length of the ventilation pipe is adjustable, the ventilation pipe can be used for ventilation of grain piles with different depths, the upper air pipe can slide up and down, after the lower air pipe is inserted into the grain piles, the upper end opening of the upper air pipe can be communicated with the air blower through the connecting pipe, the air blower blows dry air into the lower air pipe, the dry air is blown into the grain piles through the first ventilation opening, and the ventilation effect is good. The moisture phenomenon is reduced, and the storage time is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of grain storage, in particular to a grain pile ventilation device. Background Art

[0002] During the storage process of grains such as wheat and rice in granaries, it is necessary to ventilate the granaries regularly to exchange the air inside the granaries to keep the inside of the grains ventilated and dry, and to prevent local mildew in the grain piles.

[0003] The prior art generally installs ventilation equipment in advance on the inner wall or the middle of the bottom of the granary. The ventilation equipment includes multiple ventilation pipes and fans connected thereto. After the grain is put into the granary, the bottom of the grain pile is ventilated through the ventilation equipment. However, most grains are in bulk and are directly filled into the granary. When this type of bulk grain is loaded, it is easy to cause a certain impact force on the ventilation equipment in the granary, causing damage to the ventilation equipment; and for some granaries that have been built but not installed with ventilation devices, if ventilation devices are installed, drilling, piling and other means during installation will damage the overall structure of the granary and affect its structural strength. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a grain pile ventilation device.

[0005] The technical solution of this utility model is as follows:

[0006] A grain pile ventilation device comprises a plurality of ventilation pipes arranged vertically, the ventilation pipes having upper ports, the upper ports being connected via connecting pipes, and the connecting pipes being connected to a blower, a plurality of first ventilation openings being opened at the lower part of the ventilation pipes, a first filter screen being arranged outside the first ventilation openings, the lower parts of the plurality of ventilation pipes being inserted into the grain pile, and the upper ends of the plurality of ventilation pipes extending outwardly above the grain pile;

[0007] The ventilation duct includes an upper duct and a lower duct coaxially arranged up and down, the lower part of the upper duct is plugged into the upper part of the lower duct and can slide up and down, the first vent is arranged at the lower part of the lower duct, and a downward pressure rod is arranged on the inner wall of the lower end of the lower duct.

[0008] The upper air duct is plugged into the upper part of the lower air duct, and the lower air duct can be completely inserted into the grain pile. The upper air duct is partially inserted into the grain pile. The position of the upper air duct in the lower air duct is adjustable to achieve adjustable length of the ventilation duct, which is suitable for ventilation inside grain piles of different depths. The upper part of the upper air duct is used to connect with other adjacent upper air ducts through a connecting pipe. The connecting pipe can be a hose, or the connecting pipe can be flexibly connected to the upper end of the upper air duct. The connecting pipe is connected to the blower, and the blower is used to ventilate the multiple connecting pipes, upper air ducts and down air ducts that are interconnected, so that a ventilated environment is formed inside the grain pile.

[0009] The upper air duct can slide up and down along the upper part of the lower branch pipe. A second vent is arranged on the upper part of the lower air duct. To facilitate the upper air duct to slide up and expose the second vent, the highest position that the lower end surface of the upper air duct can reach is located at a plane higher than the uppermost part of the second vent.

[0010] To prevent food from entering the downwind duct from the second vent, a second elastic filter is sleeved on the outside of the downwind duct and located above the first filter. One end of the second filter is connected to the lower end surface of the upwind duct, and the other end is connected to the outer wall of the downwind duct.

[0011] After the downwind pipe is directly inserted into the grain pile, the grain in the downwind pipe needs to be extracted through a sampler to prevent the grain from blocking the first vent. However, it is troublesome to do this for each downwind pipe. For this reason, a conical tip is provided at the lower end of the downwind pipe.

[0012] The upper air duct is slidably connected with the lower air duct, but will not separate from the lower air duct. The specific structure is as follows: the upper air duct is sleeved on the outside of the lower air duct, a first limiting inner ring is provided on the inner wall of the lower end of the upper air duct, and a limiting outer ring is provided on the outer wall of the upper end of the lower air duct, and its outer diameter is greater than the inner diameter of the first limiting inner ring.

[0013] In order to facilitate pressing the lower air duct downward into the depth of the grain pile through the upper air duct, a second limiting inner ring is provided on the inner wall of the upper air duct, which is located above the first limiting inner ring and has an inner diameter smaller than the inner diameter of the lower air duct.

[0014] Regarding the setting position of the second limiting inner ring, the maximum distance between the second limiting inner ring and the first limiting inner ring is greater than the maximum vertical distance difference between the second ventilation openings on the upper and lower sides.

[0015] The specific structure of the first filter net is that the first filter net is an annular sleeve structure, which is sleeved on the outside of the downwind duct, and the mesh opening is smaller than the minimum size of the grain in the grain pile.

[0016] The installation structure of the conical tip and the downwind duct is that the upper end surface of the conical tip is provided with a sleeve sleeved on the outer wall of the downwind duct, and the lower end of the sleeve and the first filter screen are connected to the downwind duct through a connecting piece.

[0017] Regarding the size of the second filter, it needs to be long enough to follow the upper air duct and move up to the maximum stroke while still being able to block the second vent. To this end, the length of the second filter is set to be greater than half the length of the lower air duct.

[0018] The beneficial effects of the utility model are:

[0019] The overall length of the ventilation pipe is adjustable by adjusting the height of the upper air pipe above the lower air pipe. It can be used for ventilation of grain piles at different depths. The upper air pipe can slide up and down, so that after the lower air pipe is inserted into the grain pile, the upper port of the upper air pipe is connected to the blower through a connecting pipe. The blower blows dry air into the upper air pipe and the lower air pipe through the connecting pipe, and blows it into the grain pile through the first ventilation port, thereby reducing moisture and increasing storage time.

[0020] The first filter is arranged outside the first vent, and the mesh opening is smaller than the size of a single grain, so as to prevent the grain from entering the downwind duct and affecting the air discharge of the downwind duct;

[0021] A second vent is provided on the upper part of the downwind pipe, and cooperates with the position of the first vent to achieve ventilation of different depths inside the grain pile, thereby improving the ventilation effect of the grain pile and extending the storage time;

[0022] A conical tip is arranged at the lower end of the downwind pipe, which not only facilitates the smooth insertion of the downwind pipe into the deep of the grain pile, but also can seal the lower end of the downwind pipe to prevent grain from entering the downwind pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure;

[0025] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 3 for Figure 1 The enlarged structural diagram at B in the middle;

[0027] Figure 4 for Figure 1 The enlarged structural diagram at C in the middle;

[0028] Figure 5 It is a schematic diagram of the installation structure of ventilation pipes, connecting pipes and blowers;

[0029] Figure 6 It is a schematic diagram of the downwind duct structure;

[0030] Figure 7 for Figure 6 The enlarged structural diagram at D in the middle;

[0031] Figure 8 It is a schematic diagram of the structure of a single ventilation pipe;

[0032] Fig. 9 for Figure 8 Schematic diagram of partial enlarged structure;

[0033] The components represented by the reference numerals in the figure are:

[0034] 1. Granary; 2. Upper air duct; 21. First limiting inner ring; 22. Second limiting inner ring; 3. Lower air duct; 31. First vent; 32. Second vent; 33. Limiting outer ring; 4. Connecting pipe; 5. Blower; 6. First filter; 7. Second filter; 8. Conical tip; 9. Sleeve; 10. Connector; 11. Lower pressure rod. DETAILED DESCRIPTION

[0035] See also Figure 1 A grain pile ventilation device is shown, which is arranged in a grain silo 1, and includes a plurality of ventilation pipes vertically inserted in the grain pile. The plurality of ventilation pipes can be arranged in a rectangular shape and evenly distributed in the grain pile. The upper ends of the plurality of ventilation pipes extend above the grain pile, and the upper ends thereof are connected via a connecting pipe 4, and the connecting pipe 4 is connected to a blower 5, and ventilation is provided to the ventilation pipes via the blower 5.

[0036] See also Figure 2 , Figure 3 and Figure 4 As shown, regarding the structure of the ventilation duct, the ventilation duct includes an upper air duct 2 and a lower air duct 3 coaxially arranged up and down, the lower part of the upper air duct 2 is plugged into the upper part of the lower air duct 3, and can slide up and down, and the first vent 31 is arranged at the lower part of the lower air duct 3. The upper air duct 2 is slidably connected with the down air duct 3, but will not separate from the down air duct 3. The specific structure is as follows: the upper air duct 2 is sleeved on the outside of the down air duct 3, and the inner wall of the lower end of the upper air duct 2 is provided with a first limiting inner ring 21, and the first limiting inner ring 21 is detachably connected to the upper air duct 2, and the outer wall of the upper end of the down air duct 3 is provided with a limiting outer ring 33, whose outer diameter is larger than the inner diameter of the first limiting inner ring 21, and the inner wall of the lower end of the down air duct 3 is provided with a downward pressure rod 11. When the ventilation pipe is inserted into the grain pile, the down air duct 3 is first inserted into the grain pile, and then the downward pressure rod 11 is pushed downward by the sampler to facilitate the upper air duct 2 to be pulled out one end distance upward, and the down air duct 3 will not move up therewith, so that the ventilation pipe becomes longer as a whole, and the upper end of the upper air duct 2 extends out of the grain pile for connection with the connecting pipe 4. The connecting pipe 4 can be a hose, or the connecting pipe 4 is flexibly connected to the upper end of the upper air duct 2.

[0037] See also Figure 2 , Figure 8 and Fig. 9As shown, in order to facilitate the downward pressing of the downwind pipe 3 into the depth of the grain pile through the upper air pipe 2, the inner wall of the upper air pipe 2 is detachably provided with a second limiting inner ring 22, which is located above the first limiting inner ring 21 and has an inner diameter smaller than the inner diameter of the downwind pipe 3. Regarding the setting position of the second limiting inner ring 22, the maximum spacing between the second limiting inner ring 22 and the first limiting inner ring 21 is greater than the maximum vertical spacing difference between the second vents 32 on the upper and lower sides, so that the second vents 32 of the downwind pipe 3 can leak out. The above-mentioned connection mode between the upper air pipe 2 and the downwind pipe 3 can achieve the effect of adjustable length of the ventilation pipe, which can be used for ventilation of grain piles of different depths, and the upper air pipe 2 can slide up and down, so that after the downwind pipe 3 is inserted into the grain pile, the upper port of the upper air pipe 2 is connected to the blower 5 through the connecting pipe 4, and the blower 5 blows dry air into the upper air pipe 2 and the downwind pipe 3 through the connecting pipe 4, and blows into the grain pile through the first vent 31, so as to reduce the phenomenon of moisture inside the grain pile and increase the storage time of grain.

[0038] See also Figure 1 , Figure 6 and Figure 7 As shown, the lower tube wall of the downwind duct 3 is provided with a plurality of first vents 31, and the plurality of first vents 31 are respectively arranged along the axial direction and the circumferential direction of the downwind duct 3. A first filter 6 is arranged outside the first vent 31, and its mesh opening is smaller than the minimum size of the grain in the grain pile. The specific structure of the first filter 6 is that the first filter 6 is an annular sleeve structure, which is sleeved on the outside of the downwind duct 3, and the mesh opening is smaller than the minimum size of the grain in the grain pile. The lower end of the first filter 6 is fixed to the outer wall of the downwind duct 3 by binding or bonding, and the lower end of the first filter 6 is lower than the lowest position of the first vent 31, and the upper end of the first filter 6 is higher than the highest position of the first vent 31, ensuring that each first vent 31 is fully covered to prevent grain from entering the downwind duct 3 from the first vent 31 and affecting the ventilation inside the grain pile.

[0039] See also Figure 6 As shown, in order to cooperate with the first ventilation opening 31 to ventilate the inside of the grain pile, realize ventilation of different depths of the grain pile, improve the ventilation effect of the grain pile, and extend the storage time, a plurality of second ventilation openings 32 are provided on the upper part of the downwind duct 3, and the plurality of second ventilation openings 32 are respectively arranged along the axial direction and the circumferential direction of the downwind duct 3. The height positions of the plurality of second ventilation openings 32 are higher than the first ventilation openings 31. The top second ventilation opening 32 is lower than the upper end of the downwind duct 3, and lower than the height of the limiting outer ring 33, and has a certain interval with the limiting outer ring 33. In order to facilitate the upper air duct 2 to slide up and leak the second ventilation opening 32, the plane where the highest position that the lower end face of the upper air duct 2 can reach is higher than the top of the second ventilation opening 32.

[0040] See also Figure 5As shown, in order to prevent grain from entering the downwind duct 3 from the second vent 32, a second elastic filter 7 is sleeved on the outside of the downwind duct 3. The mesh opening of the second filter 7 is smaller than the minimum size of the grain, and is used to prevent grain from entering the downwind duct 3 through the second vent 32. The second filter 7 is located above the first filter 6. One end of the second filter 7 is connected to the lower end surface of the upper duct 2, and the other end is connected to the outer wall of the downwind duct 3. The length of the second filter 7 is long enough to cover the outside of the second vent 32 when the upper duct 2 moves up to the highest point on the upper part of the downwind duct 3. Regarding the size of the second filter 7, it needs to be long enough to follow the upper duct 2 and move up to the maximum stroke, and still be able to block the second vent 32. For this reason, the length of the second filter 7 is set to be greater than half the length of the downwind duct 3.

[0041] See also Figure 1 , Figure 5 and Figure 6 As shown, when installing the ventilation pipe, the downwind pipe 3 is usually inserted directly into the grain pile, and the upwind pipe 2 is pulled upward to a certain height, so that the upper end of the upwind pipe 2 can be located above the grain pile, which is convenient for connection with the connecting pipe 4, which includes a bend pipe, a straight pipe, a tee pipe and a connecting piece 10. Because the lower end of the downwind pipe 3 is open, the interior of the downwind pipe 3 will be filled with grain when the downwind pipe 3 moves downward. Before installing the connecting pipe 4, the grain in the downwind pipe 3 needs to be extracted by a sampler to avoid the grain blocking the first ventilation port 31. However, it is troublesome to do this for each downwind pipe 3. For this reason, the lower end of the downwind pipe 3 is provided with a conical tip 8, which is made of wood and will not react with the grain, and is easy to manufacture. The installation structure of the conical tip 8 and the downwind duct 3 is that the upper end surface of the conical tip 8 is provided with a sleeve 9 which is sleeved on the outer wall of the downwind duct 3, and the lower ends of the sleeve 9 and the first filter screen 6 are connected to the downwind duct 3 through a connecting piece 10, and the connecting piece 10 is a connecting piece such as a bolt. The conical tip 8 can facilitate the smooth insertion of the downwind duct 3 into the deep of the grain pile, and can also block the lower end of the downwind duct 3 to prevent grain from entering the downwind duct 3.

Claims

1. A grain pile ventilation device, characterized in that: The invention comprises a plurality of ventilation pipes arranged vertically, each of the ventilation pipes having an upper port, the upper port of the ventilation pipe being connected via a connecting pipe (4), and the connecting pipe (4) being connected to a blower (5), a plurality of first ventilation openings (31) being provided at the lower part of the ventilation pipe, a first filter screen (6) being provided outside the first ventilation opening (31), the lower parts of the plurality of ventilation pipes being inserted into a grain pile, and the upper ends of the plurality of ventilation pipes extending outwardly above the grain pile, The ventilation duct comprises an upper air duct (2) and a lower air duct (3) which are coaxially arranged in an upper and lower direction. The lower part of the upper air duct (2) is plugged into the upper part of the lower air duct (3) and can slide up and down. The first ventilation opening (31) is arranged at the lower part of the lower air duct (3), and a downward pressure rod (11) is provided on the inner wall of the lower end of the lower air duct (3).

2. A grain pile ventilation device according to claim 1, characterized in that: A second vent (32) is provided at the upper portion of the lower air duct (3), and the plane where the highest position that the lower end surface of the upper air duct (2) can reach is higher than the uppermost portion of the second vent (32).

3. A grain pile ventilation device according to claim 1, characterized in that: The outer side of the downwind duct (3) is provided with an elastic second filter screen (7), which is located above the first filter screen (6), one end of which is connected to the lower end surface of the upwind duct (2), and the other end of which is connected to the outer wall of the downwind duct (3).

4. A grain pile ventilation device according to claim 1, characterized in that: The lower end of the downwind pipe (3) is provided with a conical tip (8).

5. A grain pile ventilation device according to claim 1, characterized in that: The upper air duct (2) is sleeved on the outer side of the lower air duct (3); the inner wall of the lower end of the upper air duct (2) is provided with a first limiting inner ring (21); the outer wall of the upper end of the lower air duct (3) is provided with a limiting outer ring (33), the outer diameter of which is greater than the inner diameter of the first limiting inner ring (21).

6. A grain pile ventilation device according to claim 1, characterized in that: The inner wall of the upper air duct (2) is provided with a second limiting inner ring (22), which is located above the first limiting inner ring (21) and has an inner diameter smaller than the inner diameter of the lower air duct (3).

7. A grain pile ventilation device according to claim 6, characterized in that: The maximum distance between the second limiting inner ring (22) and the first limiting inner ring (21) is greater than the maximum vertical distance difference between the second ventilation openings (32) at the upper and lower sides.

8. A grain pile ventilation device according to claim 1, characterized in that: The first filter screen (6) is an annular sleeve structure, which is sleeved on the outside of the downwind duct (3), and the mesh opening is smaller than the minimum size of the grain in the grain pile.

9. A grain pile ventilation device according to claim 4, characterized in that: The upper end surface of the conical tip (8) is provided with a sleeve (9) sleeved on the outer wall of the downwind duct (3); the sleeve (9) and the lower end of the first filter screen (6) are connected to the downwind duct (3) via a connecting piece (10).

10. A grain pile ventilation device according to claim 3, characterized in that: The length of the second filter screen (7) is greater than half the length of the downwind duct (3).

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