Double-layer ventilation system for squat silo

Abstract

The utility model discloses a double-layer ventilation system for a squat silo, which comprises an upper-layer ventilation pipeline and a lower-layer ventilation pipeline, and the two-layer ventilation pipeline is connected by symmetrically mounting vertical air channels to form the double-layer ventilation system of the granary, the whole ventilation system is reliable in stability and low in failure rate, and the maintenance cost can be effectively saved; meanwhile, the vertical ventilation pipeline adopts a multi-section splicing design mode, so that the length of the vertical ventilation pipeline can be flexibly adjusted according to the height of the granary or the grain pile to adapt to the requirements of the granary or the grain pile with different heights, the splicing mode adopts loose joint assembly, the installation process is simple and efficient, and the labor and time cost is greatly reduced. The system is excellent in ventilation performance, high in ventilation height, good in ventilation uniformity, almost free of dead angles, high in ventilation efficiency and simple and reasonable in structural design, and the grain pile cooling and drying requirements of the squat silo can be effectively met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the mechanical ventilation technical field, concretely relates to a kind of layered ventilation system for shallow round warehouse. BACKGROUND

[0002] With the sustained and stable growth of China's grain output, the total grain reserves continue to rise, which undoubtedly increases the pressure of grain reserves, leading to the increasingly prominent problem of grain storage, the storage environment faces the challenge of gradual deterioration, and the grain loss rate is also high.Under this background, mechanical ventilation technology, as a scientific grain storage technology, plays a crucial role in the grain storage process.This technology, through the fan and the grain warehouse air duct system, promotes the penetration of air outside the warehouse through the grain pile, effectively improving the microclimate conditions of the grain pile.It not only can reduce the temperature of the heated grain and high-temperature grain, but also can adjust and control the moisture of the stored grain.Combined with the circulating fumigation equipment, the grain is subjected to circulating fumigation operation, thereby delaying the aging of grain quality.At present, mechanical ventilation technology has been widely used in modern grain warehouses and has become one of the essential storage equipment and devices in modern grain warehouses.Many years of practice have proved that mechanical ventilation grain storage technology has significant economic and social benefits in ensuring the safety of grain storage.

[0003] The mechanical ventilation of shallow round warehouse mainly relies on the ground cage and ground slot ventilation system, however, as the height of grain pile in shallow round warehouse gradually increases, such as the height of grain pile exceeding 15 meters, the pressure gradient formed inside the grain pile also increases, which directly leads to the gradual increase of resistance encountered by air flowing inside the grain pile, which will seriously hinder the smooth flow of air, making it difficult to effectively ventilate some areas inside the grain pile, i.e., the phenomenon of "blowing not through" occurs, which not only affects the drying effect of grain, but also threatens the storage quality of grain, and also brings high power consumption, high grain water loss, and poor economy;In view of the above-mentioned "blowing not through" problem, the existing solution is to use a double-layer ventilation system, such as the ventilation system disclosed in CN102282983A, which improves the ventilation efficiency of high grain pile, but the height of the system itself cannot be adjusted, which has limitations when facing grain piles or warehouses of different heights, and the upper ventilation pipeline is only supported by a single vertical ventilation pipeline, which has insufficient stability, and as the grain pile subsides, it is easy to cause the upper ventilation pipeline and the vertical ventilation pipeline to break or the upper ventilation pipeline to sink, thereby affecting the ventilation effect. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the defects in the prior art, and provides a double-layer ventilation system with high stability and adjustable height.

[0005] To achieve the above object, the utility model adopts the technical scheme, which is a kind of layered ventilation system for shallow silo, including granary main part, air total distribution box, upper air distribution box, ventilation duct, ventilator;Granary main part top is provided with natural ventilation hole, and ventilation duct includes horizontal annular ventilation duct and vertical ventilation duct;Horizontal annular ventilation duct is equipped with the ventilation hole with aperture less than grain size on it, and the horizontal annular ventilation duct includes upper annular ventilation duct in grain heap middle part and lower annular ventilation duct in grain heap bottom part;Upper annular ventilation duct and lower annular ventilation duct are same in structure;The vertical ventilation duct is composed of multiple ventilation short pipes, and the end of ventilation short pipe is equipped with flange, and gasket is arranged between adjacent ventilation short pipes and fixedly connected by quick mounting clamp;Two ends of upper annular ventilation duct are symmetrically provided with two air inlets, and each air inlet is communicated with one upper air distribution box respectively, and two ends of lower annular ventilation duct are symmetrically provided with two air inlets, and each air inlet is communicated with one air total distribution box respectively;Air inlet of air total distribution box is communicated with ventilator by pipeline;Air total distribution box and upper air distribution box are communicated by vertical ventilation duct, and air guide flap one is arranged at the connecting position of vertical ventilation duct and air total distribution box, and air guide flap two is arranged at the side connecting position of lower annular ventilation duct and air total distribution box.

[0006] Preferably, the horizontal annular ventilation duct includes left ventilation duct, middle ventilation duct and right ventilation duct, the length of left ventilation duct is equal to that of right ventilation duct, and the length of middle ventilation duct is less than that of left ventilation duct and right ventilation duct.

[0007] Preferably, the horizontal annular ventilation duct is arranged in an anti-symmetrical mode.

[0008] Preferably, the vertical ventilation duct is fixed on the inner wall of the granary main part by the hoop assembly to further reinforce the double-layer ventilation system.

[0009] The utility model discloses the beneficial effect is:

[0010] The utility model discloses the vertical ventilation duct is arranged symmetrically to reinforce and support the upper annular ventilation duct, can effectively promote the stable degree of whole ventilation system, reduces the failure rate, saves maintenance cost;Meanwhile, the vertical ventilation duct adopts the design mode of multiple splices, not only can the length of vertical ventilation duct be adjusted flexibly according to the height of granary or grain heap, adapts to the demand of granary or grain heap of different height, but also the splicing mode adopts the live joint assembly, and the installation process is simple and efficient, and the labor and time cost are greatly reduced;The system is excellent in ventilation, and the ventilation height is increased, and the ventilation uniformity is good, and almost has no dead angle, and the ventilation efficiency is high, and the structure design is simple and reasonable, can effectively satisfy the grain heap cooling and drying demand of shallow silo. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1Figure 1 is a front view of the double-layer ventilation system of the shallow silo of Example 1;

[0012] Figure 2 Figure 2 is a top plan view of the lower annular ventilation duct of Example 1;

[0013] In the figure, 1 is the silo body, 2 is the air total distribution box, 3 is the ventilator, 4 is the lower annular ventilation duct, 5 is the upper annular ventilation duct, 6 is the air guide flap one, 7 is the air guide flap two, 8 is the vertical ventilation duct, 9 is the upper air distribution box, 10 is the natural ventilation hole, and 11 is the quick-mounting clamp. DETAILED DESCRIPTION

[0014] The utility model will be further described below through the drawings and specific embodiments:

[0015] As shown in Figure 1 , Figure 2 , a double-layer ventilation system for a shallow silo, comprising a silo body (1), an air total distribution box (2), an upper air distribution box (9), a ventilation duct, and a ventilator (3); the silo body (1) is provided with a natural ventilation hole (10) at the top; the ventilation duct comprises horizontal annular ventilation ducts and vertical ventilation ducts (8); the horizontal annular ventilation ducts are provided with ventilation holes (not marked) with a hole diameter smaller than the grain particle diameter; the horizontal annular ventilation ducts comprise left ventilation ducts, middle ventilation ducts, and right ventilation ducts; the lengths of the left ventilation ducts and the right ventilation ducts are equal, and the length of the middle ventilation ducts is smaller than the lengths of the left ventilation ducts and the right ventilation ducts; the horizontal annular ventilation ducts are arranged in an anti-symmetrical structure; the horizontal annular ventilation ducts comprise an upper annular ventilation duct (5) in the middle of the grain pile and a lower annular ventilation duct (4) at the bottom of the grain pile; the upper annular ventilation duct (5) and the lower annular ventilation duct (4) have the same structure; the vertical ventilation duct (8) is composed of three ventilation short pipes; the end of each ventilation short pipe is provided with a flange; adjacent ventilation short pipes are fixedly connected through a gasket and a quick-mounting clamp (11); the two ends of the upper annular ventilation duct (5) are symmetrically provided with two air inlets, and each air inlet is in communication with one upper air distribution box (9); the two ends of the lower annular ventilation duct (4) are symmetrically provided with two air inlets, and each air inlet is in communication with one air total distribution box (2); the air inlets of the air total distribution box (2) are in communication with the ventilator (3) through a duct; the air total distribution box (2) and the upper air distribution box (9) are in communication through the vertical ventilation duct (8); the vertical ventilation duct (8) is provided with an air guide flap one (6) at the connection with the air total distribution box (2); the lower annular ventilation duct (4) is provided with an air guide flap two (7) at the side connection with the air total distribution box (2).

[0016] According to actual conditions, the above vertical ventilation duct can be fixed on the inner wall of the silo body through a hoop assembly to reinforce the double-layer ventilation system.

[0017] According to actual situation needs, the utility model can carry on the ventilation of different modes, such as whole ventilation, local ventilation through the coordinated switch of air guide flap one (6) and air guide flap two (7).

[0018] The above merely preferred embodiments of the utility model have been described, and are not used to limit the utility model, although the utility model has been described in detail with reference to foregoing embodiments, for the person skilled in the art, still can modify the technical scheme recorded in foregoing each embodiment, or equivalent replacement to part technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A double-deck ventilation system for a silo, comprising a silo body, an air main distribution box, an upper air distribution box, a ventilation duct, a ventilator, characterized in that: The natural ventilation hole is arranged on the top of the granary body, the ventilation pipeline comprises horizontal annular ventilation pipeline and vertical ventilation pipeline; the horizontal annular ventilation pipeline is provided with ventilation holes with a hole diameter smaller than that of the grain, the horizontal annular ventilation pipeline comprises upper annular ventilation pipeline in the middle of the grain pile and lower annular ventilation pipeline at the bottom of the grain pile; the upper annular ventilation pipeline and the lower annular ventilation pipeline are of the same structure; the vertical ventilation pipeline is composed of multiple ventilation short pipes, the end of the ventilation short pipe is provided with a flange, the adjacent ventilation short pipes are provided with a gasket and are fixedly connected through a quick mounting clamp; two air inlets are symmetrically arranged at the two ends of the upper annular ventilation pipeline, and each air inlet is communicated with an upper air distribution box; two air inlets are symmetrically arranged at the two ends of the lower annular ventilation pipeline, and each air inlet is communicated with an air total distribution box; the air inlet of the air total distribution box is communicated with a ventilator through a pipeline; the air total distribution box is communicated with the upper air distribution box through the vertical ventilation pipeline, a guide air flap one is arranged at the connection position of the vertical ventilation pipeline and the air total distribution box, and a guide air flap two is arranged at the side connection position of the lower annular ventilation pipeline and the air total distribution box.

2. The dual layer vent system of claim 1, wherein: The horizontal annular ventilation pipeline comprises left ventilation pipeline, middle ventilation pipeline and right ventilation pipeline, the length of the left ventilation pipeline is equal to that of the right ventilation pipeline, and the length of the middle ventilation pipeline is smaller than that of the left ventilation pipeline and the right ventilation pipeline.

3. The dual layer vent system of claim 2, wherein: The horizontal annular ventilation pipeline is arranged in an anti-symmetrical type.

4. Double skin ventilation system according to any of claims 1-3, characterized in that: The vertical ventilation pipeline is fixed on the inner wall of the granary body through a hoop assembly.

Images