Reinforced air mixing device
By installing a reinforced air mixing device with a raised structure on the inner surface of the hot air channel, the problem of uneven mixing of hot and cold air in the mine shaft room is solved, achieving full mixing of hot and cold air and improving energy efficiency, while simplifying the structure and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUHENG POWER STATION OF SHAANXI HUADIAN YUHENG COAL POWER CO LTD
- Filing Date
- 2025-09-02
- Publication Date
- 2026-06-19
AI Technical Summary
In the mine shaft room, uneven mixing of cold and hot air leads to local temperature imbalance, increasing energy waste and equipment safety hazards. Existing technical solutions are complex and costly.
An enhanced air mixing device with raised structures on the inner surface of the hot air channel is adopted to promote the mixing of hot and cold air by using turbulence. These raised structures include wavy, granular, or spiral protrusions, which simplify the structure and avoid increasing the number of components.
It achieves thorough mixing of hot and cold air, avoids structural complexity and increased costs, improves energy efficiency, and reduces safety hazards.
Smart Images
Figure CN224379893U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy conservation in mines, and in particular to an enhanced air mixing device that fully mixes hot and cold air in the scenario of introducing fresh air into the mine shaft. Background Technology
[0002] When using hot air to heat the mine shaft, uneven mixing of cold air (such as outside cold air) and hot air in the shaft room can lead to problems such as localized temperature imbalance, energy waste, reduced equipment efficiency, and a deteriorated operating environment. For example, in low-temperature areas, the temperature in some areas of the shaft may be below 2°C, which may cause icing on the shaft walls, upper tank seat, or tank top safety devices, increasing safety hazards. In high-temperature areas, localized overheating may accelerate equipment aging (such as brittle metal parts and seal failure) or affect sensor accuracy, leading to misjudgments by the control system.
[0003] In existing technologies, maintaining the overall temperature requires increasing the hot air supply, leading to increased energy consumption. Traditional heating methods suffer from poor mixing, low thermal efficiency, and significant energy waste. Furthermore, localized overcooling or overheating can affect equipment operational stability; for example, frost buildup on heat exchanger surfaces can clog pipes, or overheating can cause component malfunctions. Excessive airflow or uneven temperature within the wellhead room can also impact worker comfort and communication signal stability.
[0004] In addition, to address the aforementioned technical issues, previous designs have proposed the following solutions: designing the hot air outlet as a perforated plate or louver structure to eject hot air in multiple small airflows, increasing the contact area with cold air and promoting uniform mixing; installing arc-shaped guide plates or conical diffusers at the air outlet to prevent airflow concentration; arranging low-speed axial flow fans in the wellhead mixing area to actively promote convection mixing of hot and cold air through airflow disturbances generated by fan rotation; and automatically adjusting the airflow volume, speed, or direction of the hot air outlet based on monitoring data, increasing the hot air supply to low-temperature areas and reducing the output to high-temperature areas to dynamically optimize the mixing effect. However, these solutions lead to an increase in the number of system components, making the system structure and control more complex, and increasing manufacturing and maintenance costs. Utility Model Content
[0005] Problems to be solved by the utility model
[0006] This invention aims to solve the problem of uneven mixing of cold and hot air in the wellhead room, and aims to avoid increasing the number of components, complicating the structure, and preventing increased costs.
[0007] Solution for solving the problem
[0008] To address the aforementioned problems, this utility model provides an enhanced air mixing device for mixing hot and cold air in scenarios where fresh air is introduced into a mine. The device comprises: a shaft inlet house, located at the mine's air intake, for mixing the hot and cold air; a cold air inlet unit, located on one side wall of the shaft inlet house, for introducing external cold air into the shaft inlet house; and a hot air inlet unit, located on the other side wall of the shaft inlet house, for introducing hot air into the shaft inlet house. The hot air inlet unit includes: a shaft heating device capable of heating the external atmosphere to generate the hot air; and a hot air channel extending into the shaft inlet house, with protrusions on the inner surface of the hot air channel to create turbulence in the hot air.
[0009] The enhanced air mixing device is characterized in that wavy protrusions are provided on the inner surface of the hot air channel.
[0010] The enhanced air mixing device is characterized in that granular protrusions are provided on the inner surface of the hot air channel.
[0011] The enhanced air mixing device is characterized in that a spiral protrusion is provided on the inner surface of the hot air channel.
[0012] The enhanced air mixing device is characterized in that the hot air channel is a prefabricated pipe with the protrusions on its inner surface.
[0013] The enhanced air mixing device is characterized in that the hot air channel is a single-layer pipe with a smooth outer surface.
[0014] The enhanced air mixing device is characterized in that the cold air inlet includes a cold air inlet and a cold air channel. Outdoor cold air is introduced into the cold air channel as cold air through the cold air inlet. The cold air channel extends into the wellhead room, and the cold air enters the interior of the wellhead room through the cold air channel.
[0015] The enhanced air mixing device is characterized in that the hot air inlet is disposed on the side of the wellhead and guides the hot air to diffuse in a specific direction.
[0016] The enhanced air mixing device is characterized in that the wellhead room is under negative pressure during operation, which allows it to attract both cold and hot air.
[0017] Effects of the utility model
[0018] The enhanced air mixing device according to this utility model can fully mix the cold air and hot air in the wellhead room without increasing the number of parts, avoiding structural complexity and preventing increased costs.
[0019] The description in this specification is exemplary and explanatory only, and does not limit the scope of protection of this utility model. For better understanding and implementation, this utility model is described in detail below with reference to the accompanying drawings. Attached Figure Description
[0020] The following figures are some embodiments of this utility model. For those skilled in the art, other figures can be obtained from these figures without any creative effort.
[0021] Figure 1 This is a top view of the basic structure of the enhanced air mixing device.
[0022] Figure 2 This is a top view of the structure of the enhanced air mixing device according to the first embodiment of this utility model.
[0023] Figure 3 This is a top view of the structure of the enhanced air mixing device according to the second embodiment of this utility model.
[0024] Figure 4 This is a top view of the structure of the enhanced air mixing device according to the third embodiment of this utility model.
[0025] Figure 5 This is a schematic diagram illustrating an example of the internal structure of the hot air inner cylinder of the enhanced air mixing device of this utility model.
[0026] Explanation of reference numerals in the attached figures
[0027] 1: Wellhead room; 2: Cold air inlet; 21: Cold air inlet; 22: Cold air passage; 3: Hot air inlet; 31: Wellhead heating equipment; 32: Hot air passage. Detailed Implementation
[0028] The following detailed description of the embodiments of this utility model or the technical solutions in related technologies is provided with reference to the accompanying drawings. It should be understood that the content described below represents only a portion of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the following embodiments without inventive effort are also within the protection scope of this utility model.
[0029] Figure 1 This is a top view of the basic structure of the reinforced air mixing device. (Example:) Figure 1 As shown, the enhanced air mixing device includes: a shaft entrance room 1, which is located at the air intake of the mine, to process the fresh air to be introduced into the mine, especially to mix hot air with cold air (also known as fresh air heating treatment); a cold air inlet 2, which is located on one side wall of the shaft entrance room 1 to introduce external cold air into the shaft entrance room 1; and a hot air inlet 3, which is located on the other side wall or the side wall of the shaft entrance room 1 to introduce heated hot air into the shaft entrance room 1.
[0030] In the cold air inlet 2, outdoor cold air is introduced as cold air through the cold air inlet 21 into the cold air duct 22. The cold air duct 22 extends into the interior of the wellhead room 1, and the cold air enters the interior of the wellhead room 1 through the cold air duct 22.
[0031] The hot air inlet unit 3 includes: a wellhead heating device 31, which uses a heat source to heat air to generate hot air; and a hot air duct 32, which extends into the interior of the wellhead room 1, through which hot air enters the interior of the wellhead room 1. Here, the heat source is not particularly limited; for example, it can be waste heat from mine return air (exhaust air), waste heat from the heating system, electric heating equipment, solar heating equipment, mine water storage equipment, etc. Generally, there is no fan in the hot air duct 32, as hot air is drawn in due to the negative pressure inside the wellhead room 1. However, a fan (hot air fan) can also be installed in the wellhead heating device 31 to blow out hot air.
[0032] like Figure 1 As shown, in order to mix cold air and hot air to obtain fresh air of a predetermined temperature to be introduced into the mine, the enhanced air mixing device utilizes the characteristics of hot air having low density (rising) and cold air having high density (sinking). The hot air inlet 3 is set on the side of the wellhead (0.5-1m from the ground), allowing the hot air to diffuse upward with buoyancy and mix naturally with the sinking cold air, guiding the hot air to distribute in a specific direction (such as horizontal diffusion).
[0033] In this way, air mixing can be performed with a simple structure to obtain fresh air at a predetermined temperature. When it is necessary to adjust the temperature of the fresh air, for example, the speed of the cold air fan and the hot air fan can be adjusted, thereby adjusting the air volume of the cold air and hot air introduced into the wellhead room 1.
[0034] Researchers found that, in utilizing Figure 1 In the case of air mixing in the current structure, there is a problem of insufficient mixing between cold and hot air. While increasing the hot air fan speed to increase the airflow and thus generate turbulence to improve mixing, this also increases energy consumption. The aim is to improve air mixing without increasing energy consumption. Research has shown that modifying the hot air duct structure can generate turbulence more frequently, thereby improving air mixing.
[0035] <First Embodiment>
[0036] Figure 2This is a top view of the enhanced air mixing device according to the first embodiment of this utility model. The difference between the structure of the enhanced air mixing device according to the first embodiment and the basic structure is that the hot air channel 32 is a corrugated pipe. Specifically, when observing the cross-section of the hot air channel 32 along its extension direction, the pipe wall of the hot air channel 32 is undulating and corrugated. In particular, the inner surface of the hot air channel 32 that contacts the hot air has corrugated protrusions. In this way, the hot air has a higher probability of generating turbulence when flowing in the hot air channel 32, thereby utilizing turbulence to promote the effect of air mixing.
[0037] The outer surface of the hot air duct 32 is not particularly limited. That is to say, the hot air duct 32 can be a single-layer corrugated pipe with an undulating outer surface, or it can be a prefabricated pipe with a smooth outer surface and raised inner surface. Such a structure is simple and easy to manufacture and install.
[0038] <Second Embodiment>
[0039] Figure 3 This is a top view of the enhanced air mixing device according to the second embodiment of this utility model. The difference between the structure of the enhanced air mixing device in the second embodiment and the basic structure is that the hot air channel 32 is a pipe with a rough inner surface. Specifically, when observing the cross-section of the hot air channel 32 along its extension direction, the pipe wall of the hot air channel 32 is rough and covered with protrusions. In particular, the inner surface of the hot air channel 32 that comes into contact with the hot air is rough and covered with granular protrusions. In this way, the hot air has a higher probability of generating turbulence when flowing in the hot air channel 32, thereby utilizing turbulence to promote the effect of air mixing.
[0040] The granular protrusions on the inner surface of the hot air channel 32 are not particularly limited. Irregular granular protrusions (dot-like protrusions) can be formed on the inner surface of the hot air channel 32 through processing techniques such as sandblasting and sputtering. Such a structure is simple to manufacture and low in cost. Regular granular protrusions can also be formed on the inner surface of the hot air channel 32 through processing techniques such as stamping, additive manufacturing, and laser etching. Such a structure allows for adjustment of the position of the granular protrusions as needed, thereby enabling precise control of the generated turbulence and thus precise control of the air mixing process.
[0041] <Third Embodiment>
[0042] Figure 4This is a top view of the enhanced air mixing device according to the third embodiment of this utility model. The difference between the structure of the enhanced air mixing device in the third embodiment and the basic structure is that the hot air channel 32 is a pipe with a spiral inner surface. Specifically, when observing the cross-section of the hot air channel 32 along its extension direction, the pipe wall of the hot air channel 32 is threaded. In particular, the inner surface of the hot air channel 32 that contacts the hot air has spiral protrusions. In this way, the hot air has a higher probability of generating turbulence when flowing in the hot air channel 32, thereby utilizing turbulence to promote the effect of air mixing.
[0043] The spiral protrusions on the inner surface of the hot air duct 32 are not particularly limited. They can be set to a clockwise or counterclockwise direction as needed. The spiral protrusions can be machined to form the inner surface of the hot air duct 32, and parameters such as the spacing of the protrusions can be adjusted. This allows turbulence to be generated in the hot air duct 32 as needed, thereby enabling precise control of the air mixing process.
[0044] The enhanced air mixing device involved in the third embodiment can also make the hot air flow in a spiral shape in the hot air channel 32. The hot air introduced into the wellhead room 1 from the hot air channel 32 has a high probability of generating turbulence, thereby further promoting the effect of air mixing treatment.
[0045] Alternatively, a hot air inner cylinder can be inserted into the hot air channel 32 of the basic structure to form the structure of the enhanced air mixing device involved in the third embodiment, thereby enabling the existing air mixing device to be transformed into an enhanced air mixing device. Figure 5 This is a schematic diagram illustrating an example of the internal structure of the hot air inner cylinder of the enhanced air mixing device of this utility model. The hot air inner cylinder is a tubular component with spiral protrusions on at least its inner wall, and its outer wall is in close contact with the hot air channel 32. The hot air inner cylinder to be installed can be selected according to the structure of the hot air channel 32. The hot air inner cylinder can be a flexible or rigid component, and can be a prefabricated pipe formed integrally, or it can be composed of assembled parts; there are no particular limitations.
[0046] Summary
[0047] The embodiments described above are illustrative. The various parts can be selected and combined according to actual needs to achieve the purpose of this utility model.
[0048] For example, an enhanced air mixing device is provided for mixing hot and cold air in a scenario where fresh air is introduced into a mine. It includes: a shaft entrance 1, which is disposed at the air intake of the mine to perform air mixing treatment of hot and cold air; a cold air inlet 2, which is disposed on the side wall of the shaft entrance 1 to introduce external cold air into the shaft entrance 1; and a hot air inlet 3, which is disposed on the other side wall of the shaft entrance 1 to introduce heated hot air into the shaft entrance 1.
[0049] The cold air inlet 2 includes a cold air inlet 21 and a cold air duct 22. Outdoor cold air is introduced into the cold air duct 22 through the cold air inlet 21. The cold air duct 22 extends into the well house 1, and the cold air enters the interior of the well house 1 through the cold air duct 22.
[0050] The hot air inlet 3 includes a wellhead heating device 31 and a hot air passage 32. The wellhead heating device 31 generates hot air, and the hot air passage 32 extends into the wellhead room 1. The shape of the hot air passage 32 is not particularly limited; it is preferably cylindrical, but can also be other shapes such as a square column. Protrusions are provided on the inner surface of the hot air passage 32 to increase the probability of turbulence in the hot air, thereby improving the effect of air mixing. This eliminates the need to increase the number of components, avoids structural complexity, and prevents increased costs.
[0051] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.
Claims
1. An enhanced air mixing device for mixing hot and cold air in a scenario where fresh air is introduced into a mine, characterized in that, include: A wellhead room is located at the air intake of the mine to perform air mixing treatment that mixes the hot air and the cold air. A cold air inlet is provided on one side wall of the wellhead room to allow external cold air to be introduced into the wellhead room; as well as A hot air inlet is located on the other side wall of the wellhead room, allowing hot air to be introduced into the wellhead room. The hot air inlet includes: a wellhead heating device capable of heating the external atmosphere to generate the hot air; and a hot air duct extending to the wellhead room. The inner surface of the hot air channel is provided with protrusions, which causes the hot air to turbulent.
2. The enhanced air mixing device according to claim 1, characterized in that, The inner surface of the hot air duct is provided with wavy protrusions.
3. The enhanced air mixing device according to claim 1, characterized in that, The inner surface of the hot air channel is provided with granular protrusions.
4. The enhanced air mixing device according to claim 1, characterized in that, Spiral protrusions are provided on the inner surface of the hot air duct.
5. The enhanced air mixing device according to any one of claims 1 to 4, characterized in that, The hot air duct is a prefabricated pipe with the protrusions on its inner surface.
6. The enhanced air mixing device according to claim 5, characterized in that, The hot air duct is a single-layer pipe with a smooth outer surface.
7. The enhanced air mixing device according to claim 1, characterized in that, The cold air inlet includes a cold air inlet and a cold air channel. Outdoor cold air is introduced into the cold air channel through the cold air inlet as cold air, and the cold air channel extends into the wellhead room. The cold air enters the interior of the wellhead room through the cold air channel.
8. The enhanced air mixing device according to claim 1, characterized in that, The hot air inlet is located on the side of the wellhead and guides the hot air to diffuse in a specific direction.
9. The enhanced air mixing device according to claim 1, characterized in that, The wellhead room is under negative pressure during operation, which allows it to draw in both cold and hot air.