Hot air angular box for grain dryer

Abstract

The utility model discloses a hot air horn-shaped box for a grain drying machine, which comprises a hot air horn-shaped box, the hot air horn-shaped box comprises an inner layer plate and an outer layer plate, a support structure is arranged in an interlayer of the hot air horn-shaped box, and the support structure is used for enabling the inner layer plate and the outer layer plate of the hot air horn-shaped box to be stably connected. The two ends and the bottom of an interlayer of the hot air angular box are each provided with a closed structure, and the closed structures prevent grain from entering the interlayer of the hot air angular box. The horn-shaped box outer side plate and the horn-shaped box inner side plate are not directly connected and are connected only through a set of supporting structures, gaps exist between the grain layer side plates, the gaps are filled with air, the high-temperature horn-shaped box inner side plate cannot rapidly transfer heat to the horn-shaped box outer side plate, the temperature of the horn-shaped box outer side plate is low, and the heat dissipation effect is good. Grain particles in direct contact with the grain dryer cannot be grilled at high temperature, and the phenomenon that the grain particles are excessively dried and even burnt is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of hot air corner box technology, and in particular to a hot air corner box for a grain dryer. Background Technology

[0002] A grain dryer is a device used to dry high-moisture grains, and the corner box is a core component of the grain dryer. The corner box is a long, box-shaped structure with a triangular upper part, a rectangular lower part, and an open bottom. It is typically fixed inside the square drying section of the dryer, with its open ends connected to the hot air inlet duct. Hot air enters the dryer through one or both ends of the corner box and exits from the open bottom, contacting the grain in the gaps between adjacent corner boxes to exchange moisture and heat. Exhaust gas passes through the grain layer and exits the dryer from the lower exhaust corner box, completing the drying process in one drying section. A dryer typically has multiple drying sections, each consisting of one or more sets of hot air and exhaust corner boxes, with each set of corner boxes arranged horizontally.

[0003] Inside the dryer, grain drying relies on the contact between hot air and grain for moisture and heat exchange. However, because the corner box is continuously heated by the hot air, the temperature of the corner box is usually higher than the temperature of the surrounding grain. The grain particles close to the corner box will be continuously roasted at a high temperature. These grain particles dry faster than those that are not in contact with the corner box, and are also more likely to be over-dried or even scorched, which will affect the quality of the grain after drying.

[0004] The existing corner boxes have poor heat insulation, and grains near the corner boxes are prone to overheating, resulting in them becoming too dry or even scorched.

[0005] A corner box for a grain drying tower is disclosed in Chinese patent document CN109373740B. The corner box of the grain drying tower is a narrow, elongated trough-shaped body made of steel plate with open ends and bottom. The trough-shaped body includes a ∧-shaped trough top and two parallel vertical trough walls. The distance between the two vertical trough walls is less than the opening width at the bottom of the ∧-shaped trough top. A horizontal trough eave is provided on the lower edge of each side of the ∧-shaped trough top, which is connected to the upper edge of the vertical trough wall on that side. The ∧-shaped trough top, the two vertical trough walls, and the two horizontal trough eaves are connected together to form a corner box of the grain drying tower with a hollow arrow-shaped cross section. Each vertical groove wall has an outwardly folded edge perpendicular to the vertical groove wall at its lower edge. The corner box of this grain drying tower has a simple structure and high strength. Compared with the existing shaped box, it can increase the contact area and heat exchange time between the grain and the hot air, and the hot air utilization efficiency is high, resulting in a good grain drying effect. However, the corner box of this grain drying tower is a single-layer structure. The hot air continuously heats the corner box, resulting in a high temperature of the corner box. The grain close to the surface of the corner box is easily scorched.

[0006] To address the shortcomings of the existing technology, providing a hot air corner box for a grain dryer is a problem worthy of research. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of existing corner boxes, which have poor heat insulation and cause grain particles near the corner box to be overheated, resulting in excessive dryness or even scorching. This invention provides a hot air corner box for grain dryers, which achieves the technical effect of uniform heating of grain by the corner box and avoids local overdrying.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] A hot air corner box for a grain dryer includes a hot air corner box comprising inner and outer double-layer plates. A support structure is provided inside the interlayer of the hot air corner box to ensure a stable connection between the inner and outer layers of the hot air corner box.

[0010] The hot air corner box has a closed structure at both ends and the bottom of the interlayer, which prevents grain from entering the interior of the hot air corner box interlayer.

[0011] The distance between the inner and outer plates of the hot air corner box is greater than two millimeters, and the inner and outer plates of the hot air corner box are parallel to each other. The hot air corner box is made of heat-insulating and high-temperature resistant material. The upper part of the hot air corner box is triangular, the lower part is rectangular, and the bottom is open. The outer plate of the corner box has a lower temperature, so the grain particles in direct contact with it will not be roasted by high temperature, effectively reducing the occurrence of over-drying or even scorching of grain particles.

[0012] The support structure includes a number of fastening bolts disposed in the interlayer of the hot air corner box. The fastening bolts are equidistantly distributed in the interlayer of the hot air corner box, and the length of the fastening bolts is greater than the distance between the inner and outer plates of the hot air corner box. The support structure supports and reinforces the inner and outer interlayers of the hot air corner box.

[0013] The closed structure includes a barrier mesh set at the bottom of the hot air corner box clamping plate. The mesh opening diameter of the barrier mesh is smaller than the minimum diameter of the grain to be dried. The barrier mesh has a double-layer structure. The bottom layer of the barrier mesh is flat and set at the bottom of the interlayer of the hot air corner box. The upper layer of the barrier mesh is arched and set on top of the lower layer. The barrier mesh seals the bottom of the interlayer of the hot air corner box, preventing grain from entering the interlayer of the hot air corner box from the grain dryer, which would cause the double-layer corner box to lose its application effect.

[0014] The closed structure also includes interlayer sealing plates disposed at both ends of the hot air corner box interlayer. The shape of the interlayer sealing plates is adapted to the shape of the hot air corner box interlayer, which supports the double-layer structure of the hot air corner box and improves the overall stability of the hot air corner box.

[0015] The sandwich panel has several threaded holes, and the sandwich panel is fixedly connected to the inner wall of the grain dryer through the threaded holes and bolts.

[0016] Positive and beneficial effects:

[0017] 1. This grain dryer uses a hot air corner box. The outer side plate of the corner box has a low temperature, so the grain particles in direct contact with it will not be roasted by high temperature, effectively reducing the occurrence of over-drying or even scorching of grain particles.

[0018] 2. The grain dryer uses a hot air corner box. The fastening bolts can support the outer wall of the hot air corner box, preventing it from deforming under the pressure of the grain and affecting its performance. The fastening bolts can also improve the firmness of the hot air corner box and extend its service life.

[0019] 3. The grain dryer uses a hot air corner box with a barrier net to prevent grain from entering the inner layer of the hot air corner box, which would cause the double-layer corner box to lose its application effect. The hot air inside the hot air corner box can be discharged from the barrier net in a timely manner. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;

[0022] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 4 This utility model Figure 3 A magnified structural diagram at point B in the middle.

[0024] In the diagram: 1-Hot air corner box, 2-Fasting bolt, 3-Barrier mesh, 4-Interlayer sealing plate, 5-Threaded hole. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] Example 1

[0027] like Figures 1 to 4As shown, a hot air corner box for a grain dryer includes a hot air corner box 1, which includes inner and outer double-layer plates. A support structure is provided inside the interlayer of the hot air corner box 1 to keep the inner and outer layers of the hot air corner box 1 stably connected.

[0028] The hot air corner box 1 has a closed structure at both ends and the bottom of the interlayer to prevent grain from entering the interior of the hot air corner box 1.

[0029] like Figures 1 to 2 As shown, the distance between the inner and outer plates of the hot air corner box 1 is greater than two millimeters, and the inner and outer plates of the hot air corner box 1 are parallel to each other. The material of the hot air corner box 1 is heat-insulating and high-temperature resistant. The upper part of the hot air corner box 1 is triangular, the lower part is rectangular, and the bottom is open. By setting a double-layered hot air corner box inside the grain dryer, hot air enters the space of the inner side plate of the corner box and is discharged into the grain layer from the bottom opening. The hot air and grain exchange moisture and heat. The outer grain particles are in contact with the outer side plate of the corner box, but the outer side plate and the inner side plate of the corner box are not directly connected. They are only connected by a set of support structures. There are gaps between the grain layer side plates, and the gaps are filled with air. The high temperature of the inner side plate of the corner box cannot quickly transfer heat to the outer side plate of the corner box, so that the temperature of the outer side plate of the corner box is lower. The grain particles in direct contact with it will not be roasted by high temperature, effectively reducing the occurrence of over-drying or even scorching of grain particles.

[0030] Furthermore, the heat insulation effect of the hot air corner box 1 is closely related to factors such as the distance between the sandwich panels and the material of the hot air corner box 1. The larger the gap between the sandwich panels, the better the heat insulation effect of the hot air corner box 1. The hot air corner box 1 made of materials with poor thermal conductivity has a better heat insulation effect. The hot air corner box should be designed to meet the required heat insulation effect so that while drying the grain with hot air, it can avoid the grain close to the corner box being overheated due to its own temperature conduction.

[0031] like Figures 1 to 2 As shown, the support structure includes several fastening bolts 2 set in the interlayer of the hot air corner box 1. The fastening bolts 2 are evenly distributed in the interlayer of the hot air corner box 1. The length of the fastening bolts 2 is greater than the distance between the inner and outer plates of the hot air corner box 1. By setting the support structure of fastening bolts 2 in the interlayer of the hot air corner box 1, the inner and outer interlayers of the hot air corner box 1 are supported and reinforced. Inside the grain dryer, the outer wall of the hot air corner box 1 will be subjected to huge pressure from the grain. The fastening bolts 2 can support the outer wall of the hot air corner box 1, preventing the hot air corner box from deforming under the pressure of the grain and affecting its performance. The fastening bolts 2 can also improve the firmness of the hot air corner box 1 and extend its service life.

[0032] Furthermore, the support structure can also adopt a triangular plate-shaped structure, which is bent and distributed inside the hot air corner box 1 to form several triangular cavities, thereby improving the compressive strength of the clamping plate of the hot air corner box 1.

[0033] Example 2

[0034] like Figures 1 to 4 As shown, the closed structure includes a barrier net 3 set at the bottom of the clamping plate of the hot air corner box 1. The diameter of the mesh opening of the barrier net 3 is smaller than the minimum diameter of the grain to be dried. The barrier net 3 has a double-layer structure. The bottom layer of the barrier net 3 is flat and set at the bottom of the interlayer of the hot air corner box 1. The upper layer of the barrier net 3 is an arched structure set at the top of the lower barrier net 3. By setting the barrier net 3 at the bottom of the hot air corner box 1, the bottom of the interlayer of the hot air corner box 1 is sealed, preventing the grain in the grain dryer from entering the interlayer of the hot air corner box 1, which would cause the double-layer corner box to lose its application effect. In addition, the hot air in the hot air corner box 1 can be discharged from the barrier net 3 in time, avoiding the situation where the interlayer of the hot air corner box 1 is completely sealed, which would make it difficult for the internal heat to be discharged.

[0035] A double-layer barrier net 3 is set up, and the upper barrier net is set as an arch shape so that the barrier net can withstand greater pressure and avoid the situation where the grain inside the grain dryer exerts too much pressure on the barrier net 3, causing the barrier net to deform and fail to completely block the grain.

[0036] like Figure 1 As shown, the closed structure also includes a sandwich sealing plate 4 disposed at both ends of the sandwich of the hot air corner box 1. The shape of the sandwich sealing plate 4 is adapted to the sandwich shape of the hot air corner box 1. By setting the sandwich sealing plate 4 at both ends of the hot air corner box 1, the two ends of the sandwich of the hot air corner box 1 are sealed to prevent grain from entering the sandwich of the corner box. At the same time, it can support the double-layer structure of the hot air corner box 1 and improve the overall stability of the hot air corner box 1.

[0037] Example 3

[0038] like Figure 1 As shown, the sandwich panel has several threaded holes. The sandwich panel is fixedly connected to the inside of the grain dryer through the threaded holes and bolts. This further fixes the corner box inside the grain dryer, improving the stability of the corner box and enabling it to maintain stability under the gravity of the grain and the force of airflow.

[0039] Furthermore, when it is necessary to close the originally open end of the corner box, a sealing plate can be fixedly installed at the end of the corner box using the threaded holes on the corner box to close the end of the corner box, or a threaded hole can be set on the inside of the end of the corner box to install the sealing plate, so as to prevent hot air from being discharged from the end of the hot air corner box and affecting the drying effect on the grain.

[0040] The working principle of this utility model is as follows:

[0041] S1. The corner box is fixed inside the square drying section of the dryer. Its ends are open and connected to the hot air inlet pipe. Hot air enters the dryer through one or both ends of the corner box and exits from the bottom. It comes into contact with the grain in the gap between adjacent corner boxes and completes the heat and moisture exchange. The exhaust gas passes through the grain layer and exits the dryer from the lower exhaust gas corner box, completing the drying process in one drying section. There are usually multiple drying sections inside a dryer. Each drying section consists of one or more sets of hot air corner boxes and exhaust gas corner boxes. One set of corner boxes is arranged horizontally.

[0042] S2. After the hot air enters the space inside the corner box, it is discharged into the grain layer from the bottom opening, and the hot air exchanges moisture and heat with the grain.

[0043] S3. The outer grain particles are in contact with the outer side panel of the corner box, but the outer side panel of the corner box is not directly connected to the inner side panel of the corner box. They are only connected by a set of fastening bolts. There is a gap between the grain layer side panels, and the gap is filled with air. The high temperature of the inner side panel of the corner box cannot quickly transfer heat to the outer side panel of the corner box, so the temperature of the outer side panel of the corner box is relatively low. The grain particles in direct contact with it will not be roasted by high temperature, effectively reducing the occurrence of over-drying or even scorching of grain particles.

[0044] S4. The sandwich sealing plate is fixedly connected to the inside of the grain dryer through threaded holes and bolts. When it is necessary to close the originally open end of the corner box, the sealing plate is fixedly installed at its end using the threaded holes on the corner box to close the end of the corner box.

Claims

1. A hot air corner box for a grain dryer, comprising a hot air corner box (1), characterized in that: The hot air corner box (1) includes inner and outer double-layer plates. A support structure is provided inside the interlayer of the hot air corner box (1). The support structure is used to keep the inner and outer layers of the hot air corner box (1) stably connected. The hot air corner box (1) has a closed structure at both ends and at the bottom of the interlayer, which prevents grain from entering the interior of the hot air corner box (1).

2. The hot air corner box for a grain dryer according to claim 1, characterized in that: The distance between the inner and outer plates of the hot air corner box (1) is greater than two millimeters, and the inner and outer plates of the hot air corner box (1) are parallel to each other. The material of the hot air corner box (1) is heat-insulating and high-temperature resistant material. The upper part of the hot air corner box (1) is triangular, the lower part is rectangular, and the bottom is open.

3. The hot air corner box for a grain dryer according to claim 1, characterized in that: The support structure includes a number of fastening bolts (2) disposed in the interlayer of the hot air corner box (1). The fastening bolts (2) are equidistantly distributed in the interlayer of the hot air corner box (1), and the length of the fastening bolts (2) is greater than the distance between the inner and outer plates of the hot air corner box (1).

4. The hot air corner box for a grain dryer according to claim 1, characterized in that: The closed structure includes a barrier net (3) set at the bottom of the clamping plate of the hot air corner box (1). The diameter of the mesh opening of the barrier net (3) is smaller than the minimum diameter of the grain to be dried. The barrier net (3) is divided into a double-layer structure. The bottom layer of the barrier net (3) is a flat state set at the bottom of the interlayer of the hot air corner box (1). The upper layer of the barrier net (3) is an arched structure set at the top of the lower barrier net (3).

5. A hot air corner box for a grain dryer according to claim 4, characterized in that: The closed structure also includes a sandwich sealing plate (4) disposed at both ends of the hot air corner box (1), the shape of which is adapted to the sandwich shape of the hot air corner box (1).

6. A hot air corner box for a grain dryer according to claim 5, characterized in that: The sandwich sealing plate (4) has several threaded holes (5), and the sandwich sealing plate (4) is fixedly connected to the inner wall of the grain dryer through the threaded holes (5) and bolts.

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