Ventilator for granary

Abstract

A ventilator for a granary comprises a fan pipe, a ventilation opening pipe and a gas distribution box, an impeller with a motor is installed in the fan pipe, one end of the fan pipe is connected with the gas distribution box through the ventilation opening pipe, or the other end of the fan pipe and the ventilation opening pipe are both connected with the gas distribution box. When one end of the fan pipe is connected with the gas distribution box through the ventilation opening pipe, the fan pipe is hinged to one end of the ventilation opening pipe through a hinge, the ventilation opening pipe and the fan pipe can be in butt joint in an opening and closing mode, and the ventilation opening pipe and the fan pipe are connected through a flange or a hasp II in a locking mode. And when one end of the fan pipe and the ventilation opening pipe are respectively connected with the gas distribution box, the fan pipe and the ventilation opening pipe are respectively fixed on the granary wall body and are connected with the gas distribution box, and the outer ends of the fan pipe and the ventilation opening pipe are also provided with airtight covers which are controlled to be opened and closed by the hoist. The ventilator is simple in structure, the airtight cover is closed when the ventilator is connected with the grain cooling machine, the impeller with the motor does not need to be detached and ventilation is not needed, and application is convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of warehouse construction, specifically a ventilator for grain warehouses. Background Technology

[0002] In my country's grain storage sector, various types of warehouses, such as flat warehouses, shallow round warehouses, vertical silos, and steel silos, are used for long-term storage or turnover of grains. When storing grains like rice, wheat, and corn in small warehouses, certain measures are necessary to prevent or reduce mold and insect infestation. Maintaining low temperatures and dryness, along with circulating fumigation within the warehouse, are important measures. To achieve these objectives, ventilation is required. This ventilation involves forcing air into the gaps between grain particles, providing multiple benefits such as cooling, dehumidification, fumigation, conditioning, controlled atmosphere treatment, and removal of residual toxins and odors. This necessitates that the entire grain warehouse be airtight (leaking air) for a sustained period, while also having sealable ventilation openings. When ventilation is not required, the ventilation openings are closed and sealed, maintaining a good airtight condition within the grain warehouse. When the outside temperature is lower than the inside temperature and ventilation is needed in the grain silo, the common practice is to open the vents and connect a portable fan to blow outside air directly into the silo to cool it down. When the outside temperature is higher than the inside temperature, a grain cooler is needed to blow cool air into the silo to cool it down. Public literature also reports on some grain silo ventilation systems, such as:

[0003] 1. Chinese Patent: A Sealing Device for Closing Ventilation Openings Using Suspended Covers, Application No.: 202120409271.8, Application Date: 2021.02.25, Abstract: A sealing device for closing ventilation openings using suspended covers, characterized in that: it includes a vertically downward extending ventilation opening, several connecting lugs with screw structures respectively hinged to the outer wall of the lower extension end of the ventilation opening, a hook frame set on one side of the outer wall of the lower extension end of the ventilation opening, a cover plate hung on the hook frame by hooks cooperating with the hook frame, a semi-circular groove with a matching number and outer diameter of the lugs processed around the periphery of the cover plate, a handwheel for opening and closing the cover plate screwed on each screw structure lug, and a sealing ring provided between the ventilation opening and the cover plate.

[0004] 2. Chinese Patent: Intelligent Ventilation System, Application No.: 201420525649.0, Application Date: 2014.09.12, Abstract: This utility model is an intelligent ventilation system, belonging to the technical field of ventilation equipment for grain storage warehouses. This utility model includes a door frame and doors and windows hinged to the door frame. Ventilation openings are provided inside the door frame. The key feature is that a double-impeller reversible fan is installed inside the ventilation openings. The doors and windows are detachably connected to the door frame. A rotating shaft is provided inside the door frame, connected to the doors and windows via a connecting device. The rotating shaft is driven by a power device to perform forward and reverse rotation movements, and the power device is controlled by a controller. The doors and windows of this utility model can open or close automatically and are detachable. The double-impeller reversible fan ensures fast airflow and ideal ventilation, reducing the temperature difference between the inside and outside of the warehouse. It has a long service life, good sealing effect, high automation, high reliability, simple operation, low labor intensity, and is very convenient to assemble and disassemble.

[0005] Application research revealed that the ventilation opening disclosed in Reference 1 lacks a fan, resulting in slow airflow and unsatisfactory ventilation. An external fan is required for ventilation, making operation cumbersome. Reference 2's ventilation system includes a dual-impeller fan within the ventilation opening. When the opening is connected to a grain cooler, the dual-impeller fan obstructs the cooler's delivery of cold air, necessitating removal of the fan or simultaneous operation with the cooler. This increases labor intensity and energy consumption. Furthermore, during grain fumigation, the fan motor within the ventilation opening is susceptible to corrosion from fumigation gases, potentially leading to short circuits and fires. Summary of the Invention

[0006] The purpose of this utility model is to provide a ventilator for grain storage. This ventilator has a simple structure. When using the external natural wind ventilation opening, the airtight cover is opened and the impeller with motor inside the fan pipe is started for ventilation, eliminating the labor of moving the fan and installing the air duct. When grain cooling is required, the fan pipe and the ventilation opening pipe are separated and not connected. The ventilation opening pipe is connected to the ventilation hose of the grain cooler, which is convenient to use. When ventilation is not required, the airtight cover is closed, ensuring good airtightness.

[0007] This utility model is achieved by the following technical solution:

[0008] A ventilator for grain storage includes a fan pipe, a vent pipe, and a gas distribution box. The fan pipe houses an impeller equipped with a motor, which is resistant to phosphine gas fumigation. One end of the fan pipe is fitted with an airtight cover. A hoist is installed on the fan pipe to control the opening and closing of the airtight cover. The hoist is preferably a manual / electric dual-purpose worm gear hoist, also known as a manual / electric dual-purpose screw hoist. The impeller with the motor and the manual / electric dual-purpose worm gear hoist can be commercially available. The other end of the fan pipe is connected to the gas distribution box via the vent pipe, or both the other end of the fan pipe and the vent pipe are connected to the gas distribution box. When the other end of the fan pipe is connected to the gas distribution box via the vent pipe, the fan pipe... The ventilation vent pipe and the fan pipe are hinged together at one end, allowing the ventilation vent pipe and the fan pipe to open and close. The ventilation vent pipe and the fan pipe are connected by a flange or by a latch II locking connection. When using a latch II locking connection, the ventilation vent pipe is equipped with a latch II for locking the fan pipe. Ideally, the movable latch II is installed on the outer wall of the ventilation vent pipe, and the fixed latch II is located on the outer periphery of the fan pipe. The other end of the ventilation vent pipe is located inside an opening in the grain silo wall and is equipped with a fixed flange that connects to the ventilation duct inside the silo. When both the other end of the fan pipe and the ventilation vent pipe are connected to a gas distribution box, both the fan pipe and the ventilation vent pipe are fixed to the grain silo wall and connected to the gas distribution box. The outer end of the ventilation vent pipe is also equipped with an airtight cover controlled by a hoist. A motor- and manual / electric worm gear hoist is connected to the grain silo's temperature control system, controlling the operation of the motor- and manual / electric worm gear hoist according to a set program.

[0009] A further preferred embodiment: the fan pipe is equipped with a latch I for locking the airtight cover. The movable latch of latch I is installed on the outer wall of the fan pipe, and the fixed latch of latch I is located on the outer periphery of the airtight cover. Locking latch I makes the connection between the airtight cover and the fan pipe more secure. The aforementioned latches I and latch II are commercially available latches.

[0010] A further preferred embodiment: the mating surface between the vent pipe and the fan pipe is provided with an annular groove for the vent pipe, and the annular groove is filled with vent pipe sealing rubber. When the vent pipe and the fan pipe are connected, after locking the latch II, the end wall of the fan pipe presses against the vent pipe sealing rubber in the annular groove. The annular groove and the vent pipe sealing rubber improve the airtightness of the connection between the vent pipe and the fan pipe.

[0011] A further preferred embodiment includes an annular sound-absorbing perforated plate fixed inside the fan duct, with sound-absorbing cotton placed between the perforated plate and the inner wall of the fan duct. The perforated plate and sound-absorbing cotton effectively reduce noise.

[0012] A further preferred embodiment: the air inlet end of the fan pipe is provided with an arc-shaped air guide shroud, which can further reduce air intake noise.

[0013] This grain silo ventilator has a simple and ingenious structure. A fan pipe with a motor-driven impeller is hinged to the end of the vent pipe and locked in place with a snap-lock. An airtight cover, controlled by a hand-operated and electric worm gear mechanism, is installed at the end of the fan pipe. When the vent needs to be connected to a grain cooler, the fan pipe is disconnected from the vent pipe, and the grain cooler is connected to the vent pipe. The motor-driven impeller does not obstruct the airflow, eliminating the need to remove the impeller or operate it simultaneously with the grain cooler, making it convenient to use. When ventilation is not required, the fan pipe and vent pipe are locked together, and the airtight cover is locked to the fan pipe, ensuring good airtightness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the ventilator for grain storage in Example 1;

[0015] Figure 2 for Figure 1 A top-down view;

[0016] Figure 3 for Figure 1 A diagram of AA in the middle;

[0017] Figure 4 This is a schematic diagram of the structure of the ventilator for grain storage in Example 2;

[0018] Figure 5 This is a schematic diagram of the structure of the ventilator for grain storage in Example 3;

[0019] The names corresponding to the serial numbers in the figure are:

[0020] 1. Airtight cover; 2. Hook and loop I; 3. Fan duct; 4. Hook and loop II; 5. Ventilation vent duct; 6. Fixed flange; 7. Hinge; 8. Hoist; 9. Impeller with motor; 10. Grain silo wall; 11. Gas distribution box; 12. Ventilation vent duct sealing rubber; 13. Ventilation vent duct annular groove; 14. Sound-absorbing cotton; 15. Sound-absorbing perforated plate; 16. Flow guide hood. Detailed Implementation

[0021] To provide a clearer description of this technology, the following detailed explanation is provided in conjunction with the accompanying drawings and embodiments. Example

[0022] A ventilator for grain storage includes a fan pipe 3 and a gas distribution box 11. An impeller 9 with a motor is installed inside the fan pipe 3. The motor is a fumigation-resistant motor. An airtight cover 1 is installed at one end of the fan pipe 3. A hand-operated and electric worm gear type opening and closing mechanism 8 is installed on the fan pipe 3 to control the opening and closing of the airtight cover 1. To ensure a tight connection between the airtight cover 1 and the fan pipe 3, a latch I2 is installed on the fan pipe 3 to lock the airtight cover 1 in place. The movable latch of the latch I2 is fixedly installed on the outer wall of the fan pipe 3, and the fixed latch of the latch I2 is located on the outer periphery of the airtight cover 1. When the latch I2 is locked, the airtight cover 1 seals the fan pipe 3.

[0023] The other end of the fan pipe 3 is hinged to a vent pipe 5 via a hinge 7. One end of the vent pipe 5 is connected to the fan pipe 3. A latch II 4 for locking the fan pipe 3 is installed on the vent pipe 5. The movable latch of the latch II 4 is fixedly installed on the outer wall of the vent pipe 5, and the fixed latch of the latch II 4 is located on the outer periphery of the fan pipe 3. The mating surface between the vent pipe 5 and the fan pipe 3 is provided with a vent pipe annular groove 13. The vent pipe annular groove 13 is filled with vent pipe sealing rubber 12. When the vent pipe 5 is connected to the fan pipe 3, after locking the latch II 4, the end wall of the fan pipe 3 presses against the vent pipe sealing rubber 12 in the vent pipe annular groove 13.

[0024] When ventilation is not required, fasten latches I2 and II4 to seal the end of the fan pipe 3 with the airtight cover 1. The end wall of the fan pipe 3 presses against the sealing rubber 12 of the ventilation port pipe in the annular groove 13, and the ventilation port pipe 5 is tightly connected to the fan pipe 3, sealing the ventilation port. When natural ventilation is required, loosen latch I2, control the hand-operated electric worm gear hoist 8 to open the airtight cover 1, and start the impeller 9 with the motor to provide ventilation. When connecting to the grain cooler, loosen latch II4 to separate the fan pipe 3 from the ventilation port pipe 5, and lock the air duct of the grain cooler to the ventilation port pipe 5 to provide air supply from the grain cooler. Example

[0025] A ventilator for grain storage includes a fan pipe 3 and a gas distribution box 11. An impeller 9 with a motor is installed inside the fan pipe 3. The motor is a fumigation-resistant motor. An airtight cover 1 is installed at one end of the fan pipe 3. A hand-operated and electric worm gear type opening and closing mechanism 8 is installed on the fan pipe 3 to control the opening and closing of the airtight cover 1. In order to ensure a tight connection between the airtight cover 1 and the fan pipe 3, a latch I2 for locking the airtight cover 1 is installed on the fan pipe 3. The movable latch of the latch I2 is fixedly installed on the outer wall of the fan pipe 3, and the fixed latch of the latch I2 is located on the outer periphery of the airtight cover 1. When the latch I2 is locked, the airtight cover 1 seals the fan pipe 3.

[0026] The other end of the fan pipe 3 is hinged to a ventilation port pipe 5 via a hinge 7. One end of the ventilation port pipe 5 is connected to the fan pipe 3. The ventilation port pipe 5 and the fan pipe 3 are connected by a flange. The other end of the ventilation port pipe 5 is set in the opening of the grain silo wall 10 and is provided with a fixed flange 6 that communicates with the gas distribution box 11 inside the silo.

[0027] An annular sound-absorbing plate 15 is fixed inside the fan pipe 3, and sound-absorbing cotton 14 is provided between the sound-absorbing plate 15 and the inner wall of the fan pipe 3.

[0028] The air inlet end of the fan pipe 3 is provided with an arc-shaped air guide shroud 16.

[0029] When ventilation is not required, tighten the latch I2 to seal the end of the fan pipe 3 with the airtight cover 1; the vent pipe 5 is tightly connected to the flange of the fan pipe 3 to close the vent. When natural ventilation is required, loosen the latch I2, control the manual / electric worm gear hoist 8 to open the airtight cover 1, and start the impeller 9 with the motor to provide ventilation; when connecting to the grain cooler, use the flange connecting bolts to separate the fan pipe 3 from the vent pipe 5, and then tighten the air duct of the grain cooler to connect with the vent pipe 5 to provide air supply from the grain cooler. Example

[0030] A ventilator for grain storage includes a fan pipe 3 and a gas distribution box 11. An impeller 9 with a motor is installed inside the fan pipe 3. The motor is a fumigation-resistant motor. An airtight cover 1 is installed at one end of the fan pipe 3. A hand-operated and electric worm gear type hoist 8 is installed on the fan pipe 3 to control the opening and closing of the airtight cover 1. The other end of the fan pipe 3 and the vent pipe 5 are respectively connected to the gas distribution box 11. The fan pipe 3 and the vent pipe 5 are respectively fixed to the grain storage wall 10 and connected to the gas distribution box 11. An airtight cover 1 controlled by the hoist 8 is also installed at the outer end of the vent pipe 5. In order to ensure a tight connection between the airtight cover 1 and the fan pipe 3 and the vent pipe 5, the fan pipe 3 and the vent pipe 5 are each equipped with a latch I2 for locking the airtight cover 1. The movable latch of the latch I2 is fixedly installed on the outer wall of the fan pipe 3 and the vent pipe 5, and the fixed latch of the latch I2 is located on the outer periphery of the airtight cover 1. When the latch I2 is locked, the airtight cover 1 seals the corresponding fan pipe 3 and vent pipe 5.

[0031] An annular sound-absorbing plate 15 is fixed inside the fan pipe 3, and sound-absorbing cotton 14 is provided between the sound-absorbing plate 15 and the inner wall of the fan pipe 3.

[0032] The air inlet end of the fan pipe 3 is provided with an arc-shaped air guide shroud 16.

[0033] When ventilation is not required, lock buckle I2 to seal the ends of fan pipe 3 and vent pipe 5 with airtight cover 1. When natural ventilation is needed, loosen buckle I2 on fan pipe 3, control the hand-operated electric worm gear hoist 8 to open airtight cover 1, and start the impeller 9 with motor to ventilate. When connecting to a grain cooler, loosen buckle I2 on vent pipe 5, control the hand-operated electric worm gear hoist 8 to open airtight cover 1, lock the air duct of the grain cooler to the vent pipe 5, and close airtight cover 1 of fan pipe 3 to allow air to be supplied by the grain cooler.

[0034] The above description is not intended to limit this application, nor is this application limited to the examples described above. Any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this application should fall within the protection scope of this application.

Claims

1. A ventilator for grain storage, comprising a fan pipe (3), a vent pipe (5), and a gas distribution box (11), wherein an impeller (9) with a motor is installed inside the fan pipe (3), and an airtight cover (1) is installed at one end of the fan pipe (3); characterized in that: The fan pipe (3) is equipped with an opening and closing mechanism (8) for controlling the opening and closing of the airtight cover (1). The other end of the fan pipe (3) is connected to the gas distribution box (11) through the ventilation pipe (5), or both the other end of the fan pipe (3) and the ventilation pipe (5) are connected to the gas distribution box (11). When the other end of the fan pipe (3) is connected to the gas distribution box (11) through the ventilation pipe (5), the fan pipe (3) is hinged to one end of the ventilation pipe (5) through a hinge (7). To enable the ventilation pipe (5) and the fan pipe (3) to open and close, the ventilation pipe (5) and the fan pipe (3) are connected by flange or by fastener II (4); when the other end of the fan pipe (3) and the ventilation pipe (5) are connected to the gas distribution box (11) respectively, the fan pipe (3) and the ventilation pipe (5) are fixed on the grain warehouse wall (10) and connected to the gas distribution box (11) respectively, and the outer end of the ventilation pipe (5) is also equipped with an airtight cover (1) controlled by the opening and closing mechanism (8).

2. The ventilator for grain storage according to claim 1, characterized in that: The fan pipe (3) is equipped with a latch I (2) for locking the airtight cover (1). The movable buckle of the latch I (2) is fixedly installed on the outer wall of the fan pipe (3), and the fixed buckle of the latch I (2) is set on the outer periphery of the airtight cover (1).

3. The ventilator for grain storage according to claim 1, characterized in that: The vent pipe (5) and the fan pipe (3) are provided with a vent pipe annular groove (13). The vent pipe annular groove (13) is filled with vent pipe sealing rubber (12). When the vent pipe (5) and the fan pipe (3) are connected, after locking the buckle II (4), the end wall of the fan pipe (3) presses the vent pipe sealing rubber (12) in the vent pipe annular groove (13).

4. The ventilator for grain storage according to claim 1, characterized in that: The fan pipe (3) is fixed with an annular sound-absorbing plate (15), and sound-absorbing cotton (14) is provided between the sound-absorbing plate (15) and the inner wall of the fan pipe (3).

5. The ventilator for grain storage according to claim 1, characterized in that: The air inlet end of the fan pipe (3) is provided with an arc-shaped guide shroud (16).

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