Mine ventilation airflow turbulence improving and rectifying device

Abstract

The utility model discloses a mine ventilation airflow turbulence improving and rectifying device, which relates to the technical field of mine ventilation, and comprises a right-angle ventilation pipeline arranged in a mine, and at least two arc-shaped bent plates for rectifying the wind direction are sequentially arranged in the corner area of the right-angle ventilation pipeline from inside to outside; the side, close to the air inlet end of the right-angle ventilation pipeline, of the arc-shaped bent plate is rotationally connected to the inner wall of the right-angle ventilation pipeline, and a guide protruding shaft is fixed to the end of the side, close to the air outlet end of the right-angle ventilation pipeline, of the arc-shaped bent plate. The inner wall of the right-angle ventilation pipeline is provided with an arc-shaped guide groove allowing the guide protruding shaft on the arc-shaped bent plate to slide. And in a non-ventilation state, under the self gravity of the arc-shaped bent plate and the limiting effect of the arc-shaped guide groove. In the ventilation state, the arc-shaped bent plates are extruded under the action of wind power, and the arc-shaped bent plates can rotate by different angles according to the air volume between the two adjacent arc-shaped bent plates, so that different air volumes are rectified, and the air outlet volumes are the same as much as possible.

Description

Technical Field

[0001] This utility model relates to the field of mine ventilation technology, specifically to a mine ventilation airflow turbulence improvement and rectification device. Background Technology

[0002] Mine ventilation systems play a crucial role in ensuring the safety of underground workers, removing harmful gases, and controlling underground temperature and humidity. Right-angle ventilation ducts, as an important component of mine ventilation systems, are widely used to guide airflow. However, when airflow passes through the corner areas of right-angle ventilation ducts, turbulence frequently occurs, leading to a series of serious problems.

[0003] On the one hand, turbulent flow significantly increases ventilation resistance. This not only increases the energy consumption of ventilation equipment and shortens its lifespan, but also increases the operating costs of the mine. For example, in some mines, due to excessive ventilation resistance, the power consumption of ventilation equipment is 30% higher than normal, and the frequency of equipment maintenance also increases significantly. On the other hand, uneven airflow distribution can lead to insufficient airflow in some areas underground, making it impossible to effectively remove harmful gases such as methane and dust, posing a significant threat to the safety of underground workers.

[0004] Currently, some mines use fixed baffles installed inside ventilation ducts to improve turbulence. However, these fixed baffles cannot be adjusted according to changes in airflow, resulting in limited rectification effects and failing to meet the complex and ever-changing ventilation needs of mines. As mining depth and scale continue to expand, the challenges facing ventilation systems become increasingly severe, urgently requiring a rectification device that can adjust in real-time according to airflow volume to effectively improve airflow turbulence. Against this backdrop, the development of a mine ventilation airflow turbulence improvement and rectification device is particularly necessary. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a mine ventilation airflow turbulence improvement and rectification device.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A mine ventilation airflow turbulence improvement and rectification device includes a right-angle ventilation duct installed in the mine, wherein at least two arc-shaped bends for rectifying the airflow direction are installed sequentially from the inside to the outside of the corner area of ​​the right-angle ventilation duct.

[0008] The arc-shaped bend plate is rotatably connected to the inner wall of the right-angle ventilation duct on the side near the air inlet end of the right-angle ventilation duct, and a guide convex shaft is fixed to the end of the arc-shaped bend plate on the side near the air outlet end of the right-angle ventilation duct.

[0009] The inner wall of the right-angle ventilation duct is provided with an arc-shaped guide groove for the guide convex shaft on the arc-shaped bend plate to slide.

[0010] In the absence of ventilation, the curved plate, under its own weight and the limiting effect of the curved guide groove, will have the end of the curved plate near the air outlet pointing vertically downwards.

[0011] Preferably, the arc-shaped bending plates are concentric, and each arc-shaped bending plate is a quarter of a circular ring, with the air inlet channel of two adjacent arc-shaped bending plates parallel to the air inlet direction.

[0012] Preferably, the arc-shaped curved plate is concave inward, and the surface of the arc-shaped curved plate is smooth.

[0013] Preferably, a through shaft is fixed at the end of the arc-shaped bend plate near the air inlet side, and a blind hole is provided on the outer wall of the right-angle ventilation duct. The end of the through shaft away from the arc-shaped bend plate passes through the inner wall of the right-angle ventilation duct and extends into the blind hole.

[0014] Preferably, a torsion spring is fitted around the outside of the through shaft and inside the blind hole, with one end of the torsion spring fixed to the periphery of the through shaft and the other end of the torsion spring fixed to the inner wall of the blind hole.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In a ventilated state, the curved plate is compressed by the wind force. The curved plate can rotate at different angles depending on the air volume between two adjacent curved plates, thereby rectifying different air volumes and making the output air volume as consistent as possible. Attached Figure Description

[0017] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0018] Figure 1 A perspective view of the mine ventilation airflow turbulence improvement and rectification device of this utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of section A;

[0020] Figure 3 This is a schematic diagram of the arc-shaped bent plate of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the right-angle ventilation duct of this utility model.

[0022] The diagram shows the following labels: 1. Right-angle ventilation duct; 2. Blind hole; 3. Arc-shaped guide groove; 4. Arc-shaped bend; 5. Through shaft; 6. Torsion spring; 7. Guide convex shaft. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Example

[0025] like Figure 1-4 As shown, the mine ventilation airflow turbulence improvement and rectification device includes a right-angle ventilation duct 1 installed in the mine, and at least two arc-shaped bend plates 4 for rectifying the airflow direction are installed sequentially from the inside to the outside in the corner area of ​​the right-angle ventilation duct 1.

[0026] The curved plate 4 is rotatably connected to the inner wall of the right-angle ventilation duct 1 on the side near the air inlet end of the right-angle ventilation duct 1, and a guide convex shaft 7 is fixed on the end of the curved plate 4 near the air outlet end of the right-angle ventilation duct 1.

[0027] An arc-shaped guide groove 3 is provided on the inner wall of the right-angle ventilation duct 1 for the guide shaft 7 on the arc-shaped bend plate 4 to slide.

[0028] In the absence of ventilation, under the weight of the curved plate 4 itself and the limiting effect of the curved guide groove 3, the end of the curved plate 4 near the air outlet is vertically downward.

[0029] In the ventilated state, the curved plate 4 is squeezed by the wind force. The curved plate 4 can rotate at different angles according to the air volume between two adjacent curved plates 4, thereby rectifying different air volumes and making the air volume as equal as possible.

[0030] When uneven airflow enters from the inlet end of the right-angle ventilation duct 1, the air first enters between the two adjacent curved plates 4 through the air inlet channel. When the airflow between the two curved plates 4 is large, the airflow will squeeze the outer curved plate 4. At this time, the outer curved plate 4 will rotate outward, making the ventilation channel between the two curved plates 4 larger, thus accommodating the larger airflow. Finally, the airflow flows out from the outlet channel, thereby rectifying the uneven airflow and making the airflow from the outlet channel as uniform as possible.

[0031] Several curved plates 4 are concentric, and each of the curved plates 4 is a quarter of a circular ring. The air inlet channels of two adjacent curved plates 4 are parallel to the air inlet direction.

[0032] By making several arc-shaped curved plates 4 concentric, and each of the arc-shaped curved plates 4 being a quarter of a circle, the air inlet channels of two adjacent arc-shaped curved plates 4 are parallel to the air inlet direction. In the absence of ventilation, the air outlet channels of two adjacent arc-shaped curved plates 4 are vertically downward. This allows the air to enter different channels uniformly when entering and exit from different air ducts when exiting, resulting in better rectification effect.

[0033] The curved plate 4 is concave inward, and the surface of the curved plate 4 is smooth.

[0034] By making the curved plate 4 concave inward and making its surface smooth, the wind can more easily compress the curved plate 4 when it is concave inward, making it easier for the curved plate 4 to rotate and making the channel between two adjacent curved plates 4 more adaptable to the airflow.

[0035] A through shaft 5 is fixed to the end of the curved plate 4 near the air inlet side. A blind hole 2 is opened on the outer wall of the right-angle ventilation duct 1. The end of the through shaft 5 away from the curved plate 4 passes through the inner wall of the right-angle ventilation duct 1 and extends into the inside of the blind hole 2.

[0036] A torsion spring 6 is fitted inside the blind hole 2 and outside the through shaft 5. One end of the torsion spring 6 is fixed to the circumference of the through shaft 5, and the other end of the torsion spring 6 is fixed to the inner wall of the blind hole 2.

[0037] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A mine ventilation flow turbulence improvement rectifying device, characterized in that: it comprises a right-angle ventilation duct (1) installed in a mine, and at least two arc-shaped baffle plates (4) for rectifying the wind direction are installed in the corner area of the right-angle ventilation duct (1) from inside to outside in sequence. The arc-shaped baffle plate (4) is rotationally connected to the inner wall of the right-angle ventilation duct (1) on the side close to the air inlet end of the right-angle ventilation duct (1), and a guide convex shaft (7) is fixed to the end of the arc-shaped baffle plate (4) on the side close to the air outlet end of the right-angle ventilation duct (1). An arc-shaped guide groove (3) is formed in the inner wall of the right-angle ventilation duct (1) for the sliding of the guide convex shaft (7) on the arc-shaped baffle plate (4). Under the condition of no ventilation, the end of the arc-shaped baffle plate (4) close to the air outlet is vertically downward under the gravity of the arc-shaped baffle plate (4) itself and the limiting action of the arc-shaped guide groove (3). The arc-shaped baffle plates (4) have the same center, and each of the arc-shaped baffle plates (4) is a quarter of a circular ring, and the air inlet channels of two adjacent arc-shaped baffle plates (4) are parallel to the air inlet direction.

2. The mine ventilation airflow turbulence improving rectifier device according to claim 1, characterized in that: The arc-shaped baffle plate (4) is concave inward, and the surface of the arc-shaped baffle plate (4) is smooth.

3. The mine ventilation airflow turbulence improving rectifier device according to claim 2, characterised in that: The end of the arc-shaped baffle plate (4) close to the air inlet side is fixed with a penetrating shaft (5), a blind hole (2) is formed in the outer wall of the right-angle ventilation duct (1), and the end of the penetrating shaft (5) away from the arc-shaped baffle plate (4) penetrates through the inner wall of the right-angle ventilation duct (1) and extends into the blind hole (2).

4. The mine ventilation airflow turbulence improving rectifier device according to claim 1, characterized in that: A torsion spring (6) is sleeved on the outside of the penetrating shaft (5) and in the blind hole (2), one end of the torsion spring (6) is fixed to the circumferential side of the penetrating shaft (5), and the other end of the torsion spring (6) is fixed to the inner wall of the blind hole (2).

5. The mine ventilation airflow turbulence improving rectifier device according to claim 4, characterised in that: ​

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