Simple ventilation device for cooling and dehumidifying valley heap

Abstract

The utility model relates to a ventilation device, in particular to a simple ventilation device for cooling and dehumidifying valley piles. The ventilation device comprises a ventilation pipe, a plurality of sections of standard pipes are connected to the top of the ventilation pipe, and a draught fan is installed on the topmost standard pipe through a plug pin. An expansion pipe is inserted into the inner wall of the ventilation pipe through a sleeve, and air holes are evenly distributed in the expansion pipe. And a contraction mechanism is arranged between the expansion pipes. The ventilation device can be inserted into a valley heap through the expansion pipe to expand outwards, so that the ventilation area can be effectively expanded under the same air volume, namely the ventilation area can be effectively increased under the same fan energy consumption; the number of times of inserting and pulling the ventilation pipe can be effectively reduced through a larger ventilation area, and then the labor intensity is effectively reduced. And the expansion pipe can be shrunk inwards through the shrinking mechanism, so that the expansion pipe is not prone to hindering insertion and extraction of the ventilation pipe, and resistance during insertion and extraction of the ventilation pipe is effectively reduced. The problem that due to the fact that the ventilation area of an existing single-pipe fan is limited, labor intensity is large or energy consumption of the fan is large is solved.

Description

Technical Field

[0001] This utility model relates to a ventilation device, specifically a simple ventilation device for cooling and dehumidifying a grain pile. Background Technology

[0002] Grains (rice, wheat) are generally stored after harvesting, threshing, and drying. However, during storage, the moisture in the grain cannot be completely removed, and the grain pile is easily damp due to ground moisture; simultaneously, the internal temperature of the grain is prone to rise under the stack. Under the combined influence of humidity and high temperature, the grain is prone to sprouting or mold, which greatly affects its quality. Grain pile ventilation is generally achieved using a single-tube fan. Patent application CN213404212U discloses a novel single-tube fan for grain silos, which includes a sampling tube, a fan, a temperature sensor, and multiple ventilation pipes. The sampling tube is detachably fitted inside the ventilation pipes and extends to the end of the ventilation pipes to suck up grain from the end of the ventilation pipes, allowing the ventilation pipes to easily penetrate the grain pile and reach a greater working depth. The operation is simple and labor-saving, reducing manual labor. By inspecting the sucked grain, the location requiring ventilation can be identified. The fan is detachably connected to the top of the ventilation duct, and a temperature sensor is set at the air outlet of the fan. The temperature of the grain pile can be known by measuring the temperature of the extracted gas. The new single-tube fan can also be used to measure the temperature and humidity inside the grain silo.

[0003] The aforementioned single-tube fan can ventilate the grain pile, but the ventilation range is limited by the grain blocking the airflow from the ventilator. For the same ventilation area, either the ventilator needs to be repeatedly inserted and removed, or the ventilation volume needs to be increased. Repeatedly inserting and removing the ventilator leads to high labor intensity; increasing the ventilation volume increases the fan's energy consumption. Therefore, it is necessary to redesign a simple ventilation device for cooling and dehumidifying the grain pile to solve the above problems. Summary of the Invention

[0004] The purpose of this utility model is to provide a simple ventilation device for cooling and dehumidifying grain piles, which can effectively expand the ventilation area without increasing the energy consumption of the fan and effectively reduce the number of plugging and unplugging, thus reducing labor intensity, in order to address the shortcomings of the existing technology.

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

[0006] A simple ventilation device for cooling and dehumidifying a grain pile comprises a ventilation pipe, a standard pipe, a fan, a sleeve, and an expansion pipe. The top of the ventilation pipe is connected to multiple standard pipe sections, and the fan is installed on the topmost standard pipe via a pin. The device is characterized by: through holes evenly distributed around the circumference of the ventilation pipe; a sleeve is installed on the through holes inside the ventilation pipe; an expansion pipe is inserted into the sleeve; air holes are evenly distributed on the expansion pipe; and a contraction mechanism is provided between the expansion pipes to retract them inward.

[0007] The retraction mechanism consists of a transition tube, a ratchet, a sleeve, a winding shaft, and pull ropes. The bottom of the transition tube is connected to the ventilation tube via the ratchet. A sleeve is fixed in the ventilation tube via a support rod, and a winding shaft is inserted into the sleeve. The bottom of the winding shaft is connected to the ventilation tube via a bearing, and the top end of the winding shaft is connected to the transition tube via a support rod. Multiple pull ropes are wound on the winding shaft, and the ends of the pull ropes pass through the sleeve and are fixedly connected to the expansion tube. The top of the transition tube is fixedly connected to the standard tube via a pin.

[0008] The bottom end of the ventilation duct and the outer end of the expansion duct are both tapered, and a spiral plate is provided at the bottom end of the ventilation duct.

[0009] A torsion wrench is connected to the standard tube or transition tube.

[0010] The torsion wrench consists of symmetrically arranged semi-rings, quick-release bolts, and force-bearing rods. One end of the semi-rings is movably connected to the other end by a pin, and the other end is fixedly connected to the other end by a quick-release bolt. A force-bearing rod is provided on the circumference of the semi-rings. The semi-rings are fitted with a standard pipe or transition pipe.

[0011] The beneficial effects of this utility model are as follows:

[0012] This simple ventilation device for cooling and dehumidifying grain piles uses an expansion tube that extends horizontally into the grain pile, effectively increasing the ventilation area while maintaining the same airflow and fan energy consumption. The larger ventilation area also reduces the frequency of inserting and removing the ventilation tube, thus reducing labor intensity. A retraction mechanism allows the expansion tube to retract inwards, making it less likely to obstruct the insertion and removal of the ventilation tube, effectively reducing resistance during these processes. This solves the problem of limited ventilation area caused by existing single-tube fans, which leads to high labor intensity or high fan energy consumption. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional schematic diagram of the ventilation pipe of this utility model;

[0015] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 This is a schematic diagram of the connection of the standard tube of this utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the torsion wrench of this utility model.

[0018] In the diagram: 1. Ventilation duct, 2. Standard duct, 3. Fan, 4. Sleeve, 5. Expansion duct, 6. Through hole, 7. Air hole, 8. Transition duct, 9. Ratchet, 10. Sleeve, 11. Winding shaft, 12. Pull rope, 13. Spiral plate, 14. Half ring, 15. Quick release bolt, 16. Force rod. Detailed Implementation

[0019] This simple ventilation device for cooling and dehumidifying a grain pile consists of a ventilation pipe 1, a standard pipe 2, a fan 3, a sleeve 4, and an extension pipe 5. The top of the ventilation pipe 1 is connected to multiple sections of standard pipe 2. The standard pipe 2 has a uniform length of 1 meter or 1.2 meters. By estimating the height of the grain pile, the number of standard pipes 2 needed can be estimated, facilitating the preparation of a sufficient number in advance. Simultaneously, by calculating the number of standard pipes 2 connected, the height between the bottom of the ventilation pipe 1 and the top of the grain pile can be easily calculated, thus effectively controlling the insertion depth of the ventilation pipe 1 to ventilate the grain at a specified depth. The fan 3 is installed on the topmost standard pipe 2 via a pin. Through holes 6 are evenly distributed around the circumference of the ventilation pipe 1. A sleeve 4 is installed on each through hole 6 inside the ventilation pipe 1, and an extension pipe 5 is inserted into the sleeve 4. Air holes 7 are evenly distributed on the extension pipe 5. The function of the blower 3 is to deliver airflow into the standard pipe 2, and then into the ventilation pipe 1. This air pressure pushes the expansion pipe 5 into the grain pile, while air is blown into the grain pile through the air holes 7 on the expansion pipe 5. This airflow removes moisture and cools the inside of the grain pile. Because the expansion pipe 5 can be inserted into the grain pile to blow air, it effectively expands the ventilation area. Therefore, with the same airflow, the ventilation area can be increased significantly. This reduces the number of times the ventilation pipe 1 needs to be inserted and removed without increasing the blower power, thus reducing labor intensity. A retraction mechanism is provided between the expansion pipes 5 to retract them inwards. By retracting the expansion pipes 5 into the ventilation pipe 1, the resistance formed between the expansion pipe 5 and the grain during the insertion and removal of the ventilation pipe 1 is eliminated, thereby effectively reducing the insertion and removal resistance of the ventilation pipe 1 and facilitating its insertion and removal.

[0020] The retraction mechanism consists of a transition tube 8, a ratchet 9, a sleeve 10, a winding shaft 11, and pull ropes 12. The bottom of the transition tube 8 is connected to the ventilation tube 1 via the ratchet 9. The sleeve 10 is fixed in the ventilation tube 1 via a support rod. The winding shaft 11 is inserted into the sleeve 10. The bottom of the winding shaft 11 is connected to the ventilation tube 1 via a bearing. The top end of the winding shaft 11 is connected to the transition tube 8 via a support rod. Multiple pull ropes 12 are wound on the winding shaft 11. The ends of the pull ropes 12 pass through the sleeve 10 and are fixedly connected to the expansion tube 5. The top of the transition tube 8 is fixedly connected to the standard tube 2 via a pin. The ratchet 9 functions to drive the ventilation pipe 1 to rotate clockwise during the forward rotation of the transition pipe 8, thereby reducing the resistance to insertion into the grain pile and facilitating the insertion of the ventilation pipe 1. Simultaneously, during the reverse rotation of the transition pipe 8, the ratchet 9's free rotation causes the winding shaft 11 to rotate relative to the sleeve 10 and the ventilation pipe 1, thus winding the pull rope 12. The pull rope 12 then pulls the extension pipe 5 inward into the ventilation pipe 1, thereby reducing the resistance when the ventilation pipe 1 is pulled out. The pull rope 12 both pulls the extension pipe 5 inward and limits its movement, preventing it from slipping out.

[0021] The bottom end of the ventilation pipe 1 and the outer end of the expansion pipe 5 are tapered, so as to separate the grain through the tapered ends of the ventilation pipe 1 and the expansion pipe 5, reduce the resistance of the ventilation pipe 1 and the expansion pipe 5 when inserting into the grain pile, and facilitate the insertion of the ventilation pipe 1 and the expansion pipe 5 into the grain pile. The bottom end of the ventilation pipe 1 is provided with a spiral plate 13, which drills downward as the ventilation pipe 1 rotates, thereby driving the ventilation pipe 1 downward and reducing the downward resistance of the ventilation pipe 1.

[0022] A torsion wrench is connected to the standard tube 2 or the transition tube 8 so as to drive the standard tube 2 or the transition tube 8 to rotate.

[0023] The torsion wrench consists of symmetrically arranged semi-rings 14, quick-release bolts 15, and force-bearing rods 16. One end of the semi-rings 14 is movably connected by a pin, and the other end of the semi-rings 14 is fixedly connected by quick-release bolts 15. Force-bearing rods 16 are provided on the circumference of the semi-rings 14. The semi-rings 14 are fitted and connected to the standard tube 2 or the transition tube 8.

[0024] When this simple ventilation device for cooling and dehumidifying the grain pile is in operation, prepare a sufficient number of standard pipes 2. Rotate the winding shaft 11 to completely loosen the pull rope 12. After the winding shaft 11 is rotated into position, fit the half-ring 14 of the torsion wrench onto the transition pipe 8, and lock the half-ring onto the transition pipe 8 using the quick-release bolt 15. After locking the quick-release bolt 15, stand the ventilation pipe 1 upright, and simultaneously rotate the torsion wrench clockwise. The torsion wrench drives the ventilation pipe 1 and the spiral plate 13 to rotate sequentially through the transition pipe 8 and the ratchet 9, inserting the ventilation pipe 1 into the grain pile. After the ventilation pipe 1 is inserted, remove the torsion wrench and install the standard pipes 2 onto the transition pipe 8 using the pin. After the standard pipes 2 are installed, install the torsion wrench at the top end of the standard pipe 2. The torsion wrench and the standard pipe 2 drive the ventilation pipe 1 to rotate again, thus inserting the ventilation pipe 1 into the grain pile again. Repeat the process of installing the standard pipes 2 and removing and installing the torsion wrench to insert the ventilation pipe 1 into the bottom of the grain pile or to a set depth. After ventilation pipe 1 is inserted into place, fan 3 is installed on standard pipe 2. Fan 3 ventilates the standard pipe 2, ventilation pipe 1, and expansion pipe 5 sequentially. After ventilation in expansion pipe 5, under air pressure, expansion pipe 5 is inserted into the grain pile until the pull rope 12 is straightened. During the insertion of expansion pipe 5 into the grain pile, ventilation is provided into the grain pile through the air holes 7 on expansion pipe 5, dehumidifying and cooling the inside of the grain pile.

[0025] After ventilation is complete, turn off and disassemble the fan 3. Reverse the standard tube 2 using the torsion wrench, and then rotate the winding shaft 11 through the transition tube 8. The winding shaft 11 pulls the expansion tube 5 into the ventilation tube 1 through the tension 12. When the expansion tube 5 is fully retracted, a sudden increase in rotational resistance is felt (at this time, because the tension rope 12 is retracted to its limit, the winding shaft 11 drives the ventilation tube 1 to rotate through the tension rope 12, resulting in a sudden increase in rotational resistance). At this point, lift the standard tube 2 and disassemble the standard tubes 2 one by one until the ventilation tube 1 is completely removed.

[0026] This simple ventilation device for cooling and dehumidifying grain piles allows the expansion tube 5 to extend horizontally into the grain pile beyond the ventilation pipe 1, effectively increasing the ventilation area while maintaining the same airflow volume. This larger ventilation area also reduces the frequency of inserting and removing the ventilation pipe 1, thus reducing labor intensity. The retraction mechanism allows the expansion tube 5 to retract inwards, making it less likely to obstruct the insertion and removal of the ventilation pipe 1, effectively reducing resistance during insertion and removal. This solves the problem of limited ventilation area caused by existing single-pipe fans, which leads to high labor intensity or high fan energy consumption.

Claims

1. A simple ventilation device for cooling and dehumidifying a grain pile, comprising a ventilation pipe (1), a standard pipe (2), a fan (3), a sleeve (4), and an extension pipe (5), wherein the top of the ventilation pipe (1) is connected to multiple sections of standard pipe (2), and the fan (3) is installed on the topmost standard pipe (2) via a pin; characterized in that: The ventilation pipe (1) has through holes (6) evenly distributed around its circumference. A sleeve (4) is installed on the through hole (6) inside the ventilation pipe (1). An expansion tube (5) is inserted into the sleeve (4). Air holes (7) are evenly distributed on the expansion tube (5). A shrinking mechanism is provided between the expansion tubes (5) to shrink the expansion tubes (5) inward.

2. The simple ventilation device for cooling and dehumidifying a grain pile according to claim 1, characterized in that: The shrinking mechanism consists of a transition tube (8), a ratchet (9), a sleeve (10), a winding shaft (11), and pull ropes (12). The bottom of the transition tube (8) is connected to the ventilation tube (1) via the ratchet (9). The sleeve (10) is fixed in the ventilation tube (1) via a support rod. The winding shaft (11) is inserted in the sleeve (10). The bottom of the winding shaft (11) is connected to the ventilation tube (1) via a bearing. The top end of the winding shaft (11) is connected to the transition tube (8) via a support rod. Multiple pull ropes (12) are wound on the winding shaft (11). The ends of the pull ropes (12) pass through the sleeve (10) and are fixedly connected to the expansion tube (5). The top of the transition tube (8) is fixedly connected to the standard tube (2) via a pin.

3. A simple ventilation device for cooling and dehumidifying a grain pile according to claim 1, characterized in that: The bottom end of the ventilation pipe (1) and the outer end of the expansion pipe (5) are conical, and a spiral plate (13) is provided at the bottom end of the ventilation pipe (1).

4. A simple ventilation device for cooling and dehumidifying a grain pile according to claim 2, characterized in that: A torsion wrench is connected to the standard tube (2) or transition tube (8).

5. A simple ventilation device for cooling and dehumidifying a grain pile according to claim 4, characterized in that: The torsion wrench is composed of symmetrically arranged semi-rings (14), quick-release bolts (15) and force-bearing rods (16). One end of the semi-rings (14) is movably connected by a pin, and the other end of the semi-rings (14) is fixedly connected by quick-release bolts (15). Force-bearing rods (16) are provided on the circumference of the semi-rings (14). The semi-rings (14) are fitted and connected to the standard tube (2) or the transition tube (8).

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