A heat-removing device for the top of a grain storage warehouse

Abstract

The utility model discloses a kind of grain storage warehouse storehouse roof heat-removing devices, set in arch plate, arch plate is provided with multiple installation sites, installation site is provided with mounting seat, mounting seat is fixedly installed with fixed base, fixed base connects support, fixed base is rotatably connected with wind neck by support, wind neck is fixedly installed with wind cap, wind cap includes several wind blades, several wind blades are fixedly installed in wind neck and curved to form a hollow spherical structure.The grain storage warehouse storehouse roof heat-removing device, when the temperature difference exists between the temperature of arch plate and external environment temperature, the power airflow generated by the low air density of high temperature and temperature difference and chimney effect are used, wind cap is rotated, flowing airflow also accelerates wind cap rotation, so that the hottest air gathered at the top of arch plate is smoothly discharged to outside from between the blades of wind cap, outside gas enters between arch plate through louvre at storehouse gable end, so that the inside and outside gas exchange of storehouse arch plate is sufficient, and then effectively reduce storehouse temperature.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation and temperature control technology for grain warehouses, and in particular to a heat dissipation device for the roof of a grain storage warehouse. Background Technology

[0002] Temperature directly determines the stability of grain storage within the warehouse and also directly affects the quality of stored grain. Normally, grain temperature changes with the outside temperature; air temperature changes affect warehouse temperature, and warehouse temperature changes affect grain temperature. Approximately 70% of the heat accumulated inside the warehouse originates from the top. Grain storage enterprises need to take effective measures to reduce or slow the rise in grain temperature. The first step is to prevent heat from the top from entering the warehouse. Arched, high-rise, flat warehouses are the mainstream type for grain storage enterprises, with a double-layered, hollow, precast reinforced concrete roof. The temperature in arched, high-rise, flat warehouses is mainly affected by solar radiation, which initially raises the air temperature between the arches. The temperature of this air is a key factor directly affecting the warehouse temperature and is the main reason for the increased surface temperature of the grain pile, leading to changes in the quality of stored grain on the surface.

[0003] Currently, the design of tall, single-story warehouses with arched panels takes into account the issue of heat dissipation between the arches. The usual method is to install ventilation louvers at both ends of the gable walls, utilizing the kinetic energy of the air to expel the heat accumulated between the arches. In subsequent use, to further improve heat dissipation, the original ventilation louvers at one end of the warehouse were replaced with two exhaust fans (0.55kW power, 9310m³ / h airflow). 3 / h), and at the same time, a temperature difference controller is installed so that the fan will automatically turn on or off when the temperature between the arch plates is 2°C higher or lower than the outside temperature.

[0004] However, in the hot summer, the temperature between the arched panels reaches over 45℃, exceeding the air temperature by more than 10℃, causing the warehouse temperature to rise to 35-40℃ or even higher. This is especially true for arched flat warehouses with black SBS waterproof membrane roofs; this heat-absorbing material causes the temperature between the arched panels to reach over 50℃, resulting in a warehouse temperature no lower than 40℃, significantly impacting the stability of grain storage and the quality of the upper-layered grain. Compared to the original louvered heat dissipation method, exhaust fans and temperature difference controllers can lower the temperature between the arched panels somewhat, but due to the limited number and airflow of fans, the temperature between the arched panels remains about 5℃ higher than the air temperature. Furthermore, the fans can only be installed relatively high up, making it difficult to effectively expel the hot air accumulated at the very top of the arched panels. This also incurs electricity and maintenance costs, and installing the fans on the top of the gable wall makes maintenance inconvenient. Utility Model Content

[0005] This invention provides a heat dissipation device for the roof of a grain storage warehouse, which can solve the problem mentioned in the background art that the hot air accumulated at the top of the arched plates is still difficult to dissipate smoothly.

[0006] A heat dissipation device for the roof of a grain storage warehouse is installed on an arched plate. The arched plate has multiple installation positions, and each installation position has an installation seat. A fixed base is fixedly installed on the installation seat, and the fixed base is connected to a bracket. The fixed base is rotatably connected to a wind neck through the bracket.

[0007] The wind neck is fixedly installed with a wind cap, which includes several wind blades. The wind blades are fixedly installed on the wind neck and bent to form a hollow spherical structure.

[0008] Preferably, the fan neck includes a mounting portion, and the fan blade is fixed to the mounting portion by bolts.

[0009] Preferably, a cantilevered portion is provided below the mounting portion, and the cantilevered portion does not directly contact the fixed base.

[0010] Preferably, a protrusion is connected between the mounting part and the cantilever part, and the protrusion is an outwardly convex annular structure.

[0011] Preferably, the wind cap further includes a top disc, and the end of the wind blade away from the wind neck is fixedly installed to the edge of the top disc by bolts.

[0012] Preferably, the bracket includes a central shaft, which is fixedly mounted at the center of the top disc.

[0013] Preferably, the central shaft is fitted with a support rod.

[0014] Preferably, the support rod includes a plurality of first support rods and a plurality of second support rods.

[0015] Preferably, one end of the first support rod is fixedly installed on the inner wall of the fixed base, and the other end is rotatably connected to the central shaft through a bearing.

[0016] Preferably, one end of the second support rod is fixedly installed on the inner wall of the air neck, and the other end is connected to the central shaft.

[0017] The beneficial effects of this utility model are:

[0018] The heat-collecting device on the roof of the grain storage warehouse utilizes the low density of hot air, the dynamic airflow generated by the temperature difference, and the chimney effect to rotate the vent caps. The flowing airflow further accelerates the rotation of the vent caps, and the hot air accumulated at the top of the arches is discharged to the outside through the blades of the vent caps, ensuring sufficient gas exchange between the inside and outside of the warehouse, thereby effectively reducing the warehouse temperature. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the arched structure of the roof of a grain storage warehouse in the prior art;

[0020] Figure 2 A schematic diagram of the structure of a heat venting device for the roof of a grain storage warehouse provided by this utility model;

[0021] Figure 3 A cross-sectional view of a heat-collecting device for the roof of a grain storage warehouse provided by this utility model;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Fixed base; 2. Wind neck; 21. Mounting part; 22. Protrusion; 23. Cantilever part; 3. Wind cap; 4. Central shaft; 5. First support rod; 6. Second support rod; 7. Arch plate; 8. Mounting seat. Detailed Implementation

[0025] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0026] Based on relevant data on grain storage management, it is known that due to the radiant heat from solar energy, 70% of the heat accumulated in the flat warehouses of grain storage enterprises comes from the roof. In summer, the highest temperature between the arched slabs exceeds 50℃. The roof of the arched, tall flat warehouse is generally a double-layered, hollow, arched precast reinforced concrete slab.

[0027] Currently, the design of tall, single-story warehouses with arched panels takes into account the issue of heat dissipation between the arches. The usual approach is to install ventilation louvers at both ends of the gable walls, utilizing the kinetic energy of the air to expel the heat accumulated between the arches. In subsequent use, to further promote heat dissipation, the original ventilation louvers at one end of the warehouse are replaced with two exhaust fans, and a temperature differential controller is added. The fans automatically turn on or off when the temperature between the arches is 2°C higher or lower than the outside temperature.

[0028] However, in the hot summer, the temperature between the arched panels reaches over 45°C, exceeding the air temperature by more than 10°C, causing the warehouse temperature to rise above 35°C. This is especially true for arched flat warehouses with black SBS waterproof membrane roofs; this heat-absorbing material causes the temperature between the arched panels to reach over 50°C, resulting in a warehouse temperature no lower than 40°C, significantly impacting the stability of grain storage and the quality of the upper-layered grain. Compared to the original louvered heat dissipation method, exhaust fans and temperature difference controllers can lower the temperature between the arched panels somewhat, but due to the limited number and airflow of fans, the temperature between the arched panels remains about 5°C higher than the air temperature. Furthermore, the fans can only be installed relatively high up, making it difficult to effectively expel the hot air accumulated at the very top of the arched panels. This also incurs electricity and maintenance costs, and installing the fans on the top of the gable wall makes maintenance inconvenient.

[0029] like Figures 1-2 As shown, this utility model proposes a heat dissipation device for the roof of a grain storage warehouse, which is installed at the arch plate 7 of the warehouse roof between arch plates. The top of the arch plate 7 is provided with multiple installation positions, and each installation position is provided with an installation seat 8. The arch plate 7 has through holes at the installation positions, so that the air inside the arch plate is connected to the outside.

[0030] like Figures 1-2 As shown, the mounting base 8 is fixedly mounted with a fixed base 1, the fixed base 1 is connected to a bracket, and the fixed base 1 is rotatably connected to a wind neck 2 through the bracket.

[0031] Specifically, such as Figures 2-3 As shown, a wind cap 3 is fixedly installed on the wind neck 2. The wind cap 3 includes several wind blades, which are fixedly installed on the wind neck 2 and bent to form a hollow spherical structure.

[0032] Among them, such as Figures 3-4 As shown, the wind neck 2 includes a mounting part 21, and the fan blade is fixed to the mounting part 21 by bolts. A cantilever part 23 is provided below the mounting part 21. The cantilever part 23 does not directly contact the fixed base 1, facilitating smoother rotation of the wind cap 3. A protrusion 22 connects the mounting part 21 and the cantilever part 23; the protrusion 22 is an outwardly convex ring structure. The wind cap 3 also includes a top disc, and the end of the fan blade furthest from the wind neck 2 is fixed to the edge of the top disc by bolts.

[0033] The protrusion 22 helps reduce turbulence and resistance when airflow enters the wind cap 3, allowing the airflow to impact the blades more concentratedly and smoothly, thus guiding the airflow upward into the wind cap 3 and optimizing the airflow path. Furthermore, the smoother and more concentrated airflow effectively drives the wind cap to rotate and enhances the internal Bernoulli effect (low-pressure suction), thereby improving overall ventilation efficiency. Additionally, the structure of the protrusion 22 can also serve as a reinforcing rib on the wind neck 2, significantly improving its deformation resistance and overall rigidity, and extending its service life. While the primary function of the protrusion 22 is airflow guidance and reinforcement, its outward convex shape also plays a role in water drainage. The protrusion 22, combined with the cantilever 23, guides rainwater falling on the outer surface of the wind neck downwards along the protrusion 22, preventing it from flowing randomly or seeping into the gap between the wind neck 2 and the fixed base 1.

[0034] like Figure 3 As shown, the bracket includes a central shaft 4, which is fixedly installed at the center of the top disc. Support rods are fitted onto the central shaft 4, and these support rods include several first support rods 5 and several second support rods 6. The first support rods 5 and second support rods 6 are arranged in a circumferential array. One end of each first support rod 5 is fixedly installed on the inner wall of the fixed base 1, and the other end is rotatably connected to the central shaft 4 via a bearing. One end of each second support rod 6 is fixedly installed on the inner wall of the air collar 2, and the other end is connected to the central shaft 4. The second support rod 6 can be fixed to the central shaft 4 or connected via a bearing; regardless of the connection method, the second support rod 6 and the central shaft 4 rotate synchronously, thus maintaining relative stillness.

[0035] In this embodiment, when there is a temperature difference between the space between the arched panels and the external environment, the lower density of the hotter air, the dynamic airflow generated by the temperature difference, and the chimney effect cause the vent 3 to rotate. The flowing airflow further accelerates the rotation of the vent 3, thereby automatically and effectively expelling the hot air accumulated in the space between the lower chord plate and the arched panel 7 (i.e., the hot air gathered at the very top of the arched panels). This ensures sufficient gas exchange between the inside and outside of the arched panels, effectively reducing the warehouse temperature and controlling the temperature difference between the space and the outside temperature within 2℃-3℃, essentially synchronizing the temperature between the arched panels and the outside temperature. This heat dissipation method effectively slows down the rise in warehouse temperature and surface grain temperature, reduces the rate of deterioration in the quality of stored grain, ensures the freshness of the stored grain, and improves the stability of grain storage.

[0036] During heat dissipation, the vent 3 rotates. The greater the temperature difference, the more pronounced the chimney effect. The faster the vent 3 rotates, the faster the airflow accelerates its rotation, resulting in smoother gas exchange. No manual control or other power devices are required, saving on electricity and maintenance costs. It eliminates the need for expensive ventilation fans and additional power lines, circuit breakers, and temperature controllers, thus achieving integrated temperature control, energy saving, and consumption reduction. Furthermore, the heat dissipation device on the roof of the grain storage warehouse is made of stainless steel (arch plate 7), making it lightweight, durable, corrosion-resistant, easy to install, and with low maintenance costs.

[0037] Working principle: When there is a temperature difference between the temperature between the arch plates and the external environment, the high-temperature air has a low density, and the dynamic airflow generated by the temperature difference and the chimney effect cause the wind cap 3 to rotate. The hot air gathered at the top of the arch plates flows out from between the blades of the wind cap 3 and is discharged to the outside.

[0038] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A heat-collecting device for the roof of a grain storage warehouse, disposed on an arch plate (7), wherein the arch plate (7) is provided with multiple mounting positions, characterized in that, An installation seat (8) is provided at the installation position. A fixed base (1) is fixedly installed on the installation seat (8). The fixed base (1) is connected to a bracket. The fixed base (1) is rotatably connected to a wind neck (2) through the bracket. The wind neck (2) is fixedly installed with a wind cap (3), which includes several wind blades. The wind blades are fixedly installed on the wind neck (2) and bent to form a hollow spherical structure.

2. The heat dissipation device for the roof of a grain storage warehouse as described in claim 1, characterized in that, The wind neck (2) includes a mounting part (21), and the wind blade is fixed to the mounting part (21) by bolts.

3. The heat dissipation device for the roof of a grain storage warehouse as described in claim 2, characterized in that, A cantilevered part (23) is provided below the mounting part (21), and the cantilevered part (23) has no direct contact with the fixed base (1).

4. The heat dissipation device for the roof of a grain storage warehouse as described in claim 3, characterized in that, A protrusion (22) is connected between the mounting part (21) and the cantilever part (23), and the protrusion (22) is an outwardly convex ring structure.

5. A heat dissipation device for the roof of a grain storage warehouse as described in claim 2, characterized in that, The wind cap (3) also includes a top disc, and the end of the wind blade away from the wind neck (2) is fixedly installed on the edge of the top disc by bolts.

6. The heat dissipation device for the roof of a grain storage warehouse as described in claim 5, characterized in that, The bracket includes a central shaft (4), which is fixedly installed at the center of the top disc.

7. A heat dissipation device for the roof of a grain storage warehouse as described in claim 6, characterized in that, The central shaft (4) is fitted with a support rod.

8. A heat dissipation device for the roof of a grain storage warehouse as described in claim 7, characterized in that, The support rod includes a plurality of first support rods (5) and a plurality of second support rods (6).

9. A heat dissipation device for the roof of a grain storage warehouse as described in claim 8, characterized in that, One end of the first support rod (5) is fixedly installed on the inner wall of the fixed base (1), and the other end is rotatably connected to the central shaft (4) through a bearing.

10. A heat dissipation device for the roof of a grain storage warehouse as described in claim 8, characterized in that, One end of the second support rod (6) is fixedly installed on the inner wall of the wind neck (2), and the other end is connected to the central shaft (4).

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