A device for equalizing air volume distribution of a coal mine ventilation opening

Abstract

The utility model discloses a kind of coal mine ventilation opening air volume balanced distribution's device, it is related to balanced distribution's device technical field, comprising: equalizing cylinder, one end is air inlet, the other end is air outlet;Main air pipe, connect in the air inlet of the equalizing cylinder, for conveying air flow;Shunt pipe, connect in the air outlet of the equalizing cylinder, multiple shunt passages are equipped in it;Multiple inclined rods, circumferentially be inclined and be fixed in the inside of the equalizing cylinder, the one end of each the inclined rod is close to the air inlet of the equalizing cylinder;Multiple distribution balls, along the axial array installation of the inclined rod;Wherein, multiple inclined rods and distribution ball jointly constitute horn-like structure, for the airflow entering from middle part is diffused to circumferential direction, the utility model device is guided airflow to circumferential diffusion by horn-like inclined rod, cooperate diameter gradually small, distribution density adaptation distribution ball, avoid airflow gathering in middle part and form high flow rate area, optimize diffusion uniformity.

Description

Technical Field

[0001] This utility model relates to the technical field of devices for balanced distribution, specifically a device for balanced distribution of air volume in coal mine ventilation openings. Background Technology

[0002] In underground coal mine production operations, the ventilation system is a key infrastructure to ensure the safety of workers and maintain normal production order. Its core requirement is to accurately deliver sufficient and stable fresh air to each work area, while expelling harmful gases and dust. Therefore, the uniform distribution and efficient delivery of airflow directly determine the ventilation effect.

[0003] However, traditional coal mine ventilation devices have obvious technical defects in practical applications: in the initial diffusion stage of airflow, due to the lack of a scientific guidance and distribution structure, the airflow tends to accumulate in the middle of the device, forming a local high-velocity area, resulting in an imbalance in the circumferential airflow distribution; in the airflow regulation stage, traditional devices are difficult to accurately divert and directionally guide the airflow, which not only easily causes the airflow to generate excessive impact pressure when it comes into contact with the structural surface, causing local airflow turbulence, but also generally has the problem of insufficient airflow in the diversion channel on the inner wall side, which makes it impossible to achieve uniform airflow distribution and is not conducive to use. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a device for the balanced distribution of airflow in coal mine ventilation openings.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A device for evenly distributing airflow at coal mine ventilation openings, comprising:

[0007] The equalizer has an air inlet at one end and an air outlet at the other.

[0008] The main air duct is connected to the air inlet of the equalization cylinder and is used to transport airflow.

[0009] The diversion pipe is connected to the air outlet of the equalization cylinder and has multiple diversion channels inside.

[0010] Multiple diagonal rods are fixed circumferentially inclined inside the equalizing cylinder, with one end of each diagonal rod close to the air inlet of the equalizing cylinder;

[0011] Multiple distribution balls are mounted in an array along the axial direction of the inclined rod;

[0012] The multiple diagonal bars and distribution balls together form a horn-like structure, which is used to diffuse the airflow entering from the center to the circumference.

[0013] Preferably, the diameter of the distribution ball gradually decreases along the inclined rod from one end located in the middle of the equalization cylinder to the end closer to the inner wall of the equalization cylinder.

[0014] Preferably, the diameter of the multiple rings formed by the distribution ball in the circumferential direction along the airflow direction gradually increases, and the distribution density of the distribution ball per unit length gradually decreases.

[0015] Preferably, the ratio of the maximum distance L between the frontmost and rearmost distribution balls of the trumpet-shaped structure to the radius R of the equalization cylinder satisfies: 1.5≤L / R≤3.0.

[0016] Preferably, the distribution ball has a through hole in the middle of one side of the air inlet of the equalization cylinder.

[0017] Preferably, the surface of the distribution ball in the middle of the equalization cylinder is provided with an arc-shaped groove along the airflow direction, and the tangent direction of the tail end of the arc-shaped groove faces the diversion channel of the diversion pipe near the inner wall.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. The device guides the airflow to diffuse in a circumferential direction through a horn-shaped inclined rod, and with the help of distribution spheres with gradually decreasing diameter and appropriate distribution density, it avoids the formation of a high-velocity zone in the middle of the airflow and optimizes the uniformity of diffusion.

[0020] 2. The through holes of the distribution ball achieve flow diversion, buffer flow velocity and prevent airflow turbulence, while the arc-shaped groove guides the airflow to the inner wall side diversion channel in a directional manner, making up for the deficiency of insufficient air volume on the inner wall side of traditional devices, and achieving dual uniformity of airflow in both the circumferential and radial directions. Attached Figure Description

[0021] 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:

[0022] Figure 1 A three-dimensional structural schematic diagram of the device for evenly distributing air volume in coal mine ventilation openings according to this utility model;

[0023] Figure 2 An exploded structural diagram of the device for balanced airflow distribution in coal mine ventilation openings according to this utility model;

[0024] Figure 3 A schematic diagram of the internal structure of the equalization cylinder of the device for equalizing the air volume distribution in coal mine ventilation openings according to this utility model;

[0025] Figure 4 This is a front view of the device for evenly distributing airflow in coal mine ventilation openings according to this utility model.

[0026] Figure 5 This is a cross-sectional view (AA) of the device for evenly distributing airflow in coal mine ventilation openings according to this utility model.

[0027] The diagram is labeled as follows: 1. Equalizing cylinder; 2. Main duct; 3. Diverter duct; 4. Diagonal rod; 5. Distribution ball. Detailed Implementation

[0028] 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.

[0029] Example

[0030] like Figure 1-5 As shown, a device for evenly distributing airflow at coal mine ventilation openings includes:

[0031] Equalizing Cylinder 1: Equalizing cylinder 1 is the core load-bearing and airflow regulating component of the device, and its overall structure is cylindrical. One end is the air inlet, serving as the channel for airflow into the device, and is tightly connected to the main air duct 2 to ensure smooth airflow. The other end is the air outlet, connected to the distribution pipe 3, where the regulated airflow enters the distribution pipe 3. Equalizing cylinder 1 provides a stable installation and working space for other internal components (slant rod 4, distribution ball 5), while its smooth inner wall design reduces airflow resistance during the flow process, ensuring the stability of airflow.

[0032] Main air duct 2: Main air duct 2 is mainly responsible for airflow transportation. One end of it is connected to the main air duct of the coal mine ventilation system, and the other end is connected to the air inlet of the equalization cylinder 1. Main air duct 2 is made of high-strength, corrosion-resistant materials, which can withstand the complex environmental pressure and airflow impact in the coal mine, ensuring that there will be no damage or leakage during long-term use, and ensuring that the airflow can be continuously and stably delivered to the equalization cylinder 1.

[0033] Diverter 3: Diverter 3 connects to the air outlet of equalization cylinder 1 and is a key component for delivering the evenly distributed airflow to various working areas underground in the coal mine. Diverter 3 has multiple diversion channels inside, which are rationally laid out and designed according to the ventilation needs of the coal mine. Each diversion channel corresponds to an underground working area or ventilation node. The size and number of diversion channels can be adjusted according to actual ventilation requirements to ensure that each working area receives the required airflow.

[0034] Diagonal rods 4: There are multiple diagonal rods 4, which are fixed inside the equalizing cylinder 1 in a circumferentially inclined manner. One end of each diagonal rod 4 is close to the air inlet of the equalizing cylinder 1, while the other end extends towards the inner wall of the equalizing cylinder 1. The diagonal rods 4 are made of high-strength metal material, possessing good load-bearing capacity and stability, and can firmly support the distribution ball 5. Their circumferentially inclined installation method forms the basis of the trumpet-like structure, providing a guiding path for airflow to diffuse circumferentially from the center of the device.

[0035] Distribution Ball 5: Multiple distribution balls 5 are also provided, arranged in an array along the axial direction of the inclined rod 4. Distribution balls 5 play a crucial role in airflow regulation and have the following special structural design:

[0036] Diameter variation pattern: The diameter of the distribution ball 5 gradually decreases along the inclined rod 4 from one end located in the middle of the equalization cylinder 1 towards the end closer to the inner wall of the equalization cylinder 1. This diameter variation design can reasonably adjust the airflow resistance according to the changes in flow rate and velocity during the diffusion process, ensuring that the airflow remains stable during the diffusion process and avoiding local airflow turbulence. At the same time, when the gas flows through the equalization cylinder 1, due to the large diameter and high resistance of the distribution ball 5 in the middle of the equalization cylinder 1, the gas will be diffused circumferentially by the arc surface of the distribution ball 5, improving the uniformity of the airflow.

[0037] Ring diameter and distribution density: The diameter of the multiple rings formed by the distribution sphere 5 along the circumferential direction in the airflow direction gradually increases, while the distribution density of the distribution sphere 5 gradually decreases per unit length. This design is adapted to the airflow diffusion path. As the airflow diffuses circumferentially, the decrease in distribution density reduces the resistance of the airflow during its flow process near the inner wall of the equalization cylinder 1, which can better distribute the airflow with high velocity in the middle of the original main duct 2, further ensuring the uniformity of airflow distribution.

[0038] Optimization Scheme 1, through-hole design: A through-hole is provided in the middle of the side of the distribution ball 5 facing the air inlet of the equalization cylinder 1. This through-hole allows some airflow to pass directly through the distribution ball 5, playing a role in diversion and buffering, avoiding excessive impact pressure on the surface of the distribution ball 5, and also helping to regulate the flow speed and direction of the airflow, improving the balance of air volume distribution.

[0039] Optimization Scheme Two: Arc-shaped Groove Design. An arc-shaped groove is formed on the surface of the distribution ball 5 in the middle of the equalization cylinder 1, running along the airflow direction. The tangent at the end of the arc-shaped groove faces the distribution channel near the inner wall of the distribution pipe 3. The arc-shaped groove guides the airflow, directing some of it to the distribution channel near the inner wall of the distribution pipe 3. This effectively solves the problem of insufficient airflow in the distribution channel near the inner wall in traditional ventilation devices, further ensuring a balanced distribution of airflow in each distribution channel.

[0040] Airflow introduction stage: The airflow in the main air duct of the coal mine ventilation system first enters the main air duct 2. Utilizing its high strength and corrosion-resistant material properties, the main air duct 2 withstands the pressure and airflow impact of the complex underground environment while stably and leak-free transporting the airflow to the air inlet of the core component of the device—the equalization cylinder 1. In this stage, the main air duct 2 acts as the "channel carrier" for airflow transport, ensuring the continuity and stability of the initial airflow transport and laying the foundation for subsequent balanced airflow distribution.

[0041] Initial airflow regulation and diffusion stage: After the airflow enters the equalization cylinder 1, it first comes into contact with the distribution ball 5 supported by the inclined rod 4 inside. The inclined rod 4 is installed in a circumferentially inclined manner, with one end close to the air inlet of the equalization cylinder 1 and the other end extending towards the inner wall. The resulting trumpet-shaped structure provides a guiding path for the airflow to diffuse from the center of the device to the circumference.

[0042] Because the distribution balls 5 are arranged in an array along the axial direction of the inclined rod 4, and their diameters follow the rule of "gradually decreasing from the middle to the inner wall," when the airflow impacts the distribution balls 5, the larger diameter distribution balls 5 in the middle experience greater resistance. Their arc-shaped surfaces diffuse most of the airflow circumferentially, preventing the airflow from concentrating in the middle of the equalization cylinder 1 and forming a high-velocity region. At the same time, the diameter of the ring formed by the distribution balls 5 gradually increases and the distribution density per unit length gradually decreases in the circumferential direction of the airflow. This design is precisely adapted to the airflow diffusion path: as the airflow diffuses circumferentially, the decrease in distribution density reduces the flow resistance of the airflow near the inner wall of the equalization cylinder 1, further optimizing the uniformity of airflow diffusion and solving the problem of airflow easily accumulating in the middle in traditional devices.

[0043] Airflow optimization and adjustment stage: To further improve the accuracy of airflow distribution, the device uses two optimization designs to perform secondary airflow adjustment:

[0044] Through-hole buffer diversion: A through-hole is opened in the middle of the side of the distribution ball 5 facing the air inlet of the equalization cylinder 1, allowing some airflow to pass directly through the distribution ball 5. This design not only diverts the airflow and avoids excessive impact pressure on the surface of the distribution ball 5, but also buffers the overall airflow velocity through the "penetrating" flow of the airflow, while regulating the airflow direction to prevent local airflow turbulence, thus providing stable airflow conditions for subsequent uniform distribution.

[0045] Arc-shaped groove directional guidance: The arc-shaped groove (with its tangential end facing the diversion channel of the diversion pipe 3 near the inner wall) on the surface of the distribution ball 5 in the middle of the equalization cylinder 1 can directionally guide the airflow during the diffusion process. Through the guiding effect of the arc-shaped groove, some of the airflow that would normally tend to gather in the middle is guided to the diversion channel of the diversion pipe 3 near the inner wall, effectively making up for the defect of "insufficient airflow in the diversion channel on the inner wall side" in traditional ventilation devices, and achieving a dual uniform distribution of airflow in both the circumferential and radial directions within the equalization cylinder 1.

[0046] Final airflow distribution and delivery stage: After multiple adjustments by the inclined rods 4 and distribution balls 5 (including through holes and arc groove optimization) inside the equalizing cylinder 1, the airflow has formed a uniform and stable flow state, and then enters the diversion pipe 3 from the air outlet of the equalizing cylinder 1. Multiple pre-set diversion channels within the diversion pipe 3 correspond one-to-one with each working area or ventilation node in the coal mine, and the size and number of channels can be adjusted according to actual ventilation needs. The uniform airflow is precisely delivered to each target area through the diversion channels, ensuring that all working areas receive the required air volume and achieving a balanced distribution of airflow at the coal mine ventilation openings.

[0047] In the initial airflow regulation and diffusion stage, the device guides the airflow to diffuse in a circumferential direction through a horn-shaped inclined rod 4, and with the distribution spheres 5 of gradually smaller diameter and appropriate distribution density, it avoids the airflow from gathering in the middle to form a high flow velocity zone and optimizes the uniformity of diffusion.

[0048] During the airflow optimization and regulation stage, the through holes of the distribution ball 5 achieve flow diversion, buffer flow velocity and prevent airflow turbulence, while the arc-shaped groove of the distribution ball 5 guides the airflow to the inner wall side diversion channel in a directional manner, making up for the deficiency of insufficient air volume on the inner wall side of the traditional device, and achieving dual uniformity of airflow in both the circumferential and radial directions.

[0049] In the final airflow distribution and delivery stage, the diversion pipe 3 delivers uniform airflow precisely to each work area through the corresponding diversion channel that can be adjusted as needed, ensuring that the air volume meets the standard and achieving a balanced distribution of air volume at the coal mine ventilation opening.

[0050] 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 device for evenly distributing airflow at coal mine ventilation openings, characterized in that, include: The equalizer (1) has an air inlet at one end and an air outlet at the other end; The main air duct (2) is connected to the air inlet of the equalization cylinder (1) and is used to transport airflow; The diversion pipe (3) is connected to the air outlet of the equalization cylinder (1) and has multiple diversion channels inside. Multiple inclined rods (4) are fixed circumferentially inside the equalizing cylinder (1), with one end of each inclined rod (4) close to the air inlet of the equalizing cylinder (1); Multiple distribution balls (5) are installed in an array along the axial direction of the inclined rod (4); The multiple inclined rods (4) and the distribution ball (5) together form a horn-shaped structure for diffusing the airflow entering from the center to the circumference.

2. The device for evenly distributing airflow at coal mine ventilation openings according to claim 1, characterized in that: The diameter of the distribution ball (5) gradually decreases along the inclined rod (4) from one end located in the middle of the equalization cylinder (1) towards the end closer to the inner wall of the equalization cylinder (1).

3. The device for evenly distributing airflow at coal mine ventilation openings according to claim 2, characterized in that: The diameter of the multiple rings formed by the distribution ball (5) along the circumferential direction in the airflow direction gradually increases, and the distribution density of the distribution ball (5) per unit length gradually decreases.

4. The device for evenly distributing airflow at coal mine ventilation openings according to claim 3, characterized in that: The ratio of the maximum distance (L) between the frontmost and rearmost distribution balls (5) of the trumpet-shaped structure to the radius (R) of the equalization cylinder (1) satisfies: 1.5≤L / R≤3.

0.

5. The device for evenly distributing airflow at coal mine ventilation openings according to claim 4, characterized in that: The distribution ball (5) has a through hole in the middle of the side facing the air inlet of the equalization cylinder (1).

6. The device for evenly distributing airflow at coal mine ventilation openings according to claim 5, characterized in that: The distribution ball (5) in the middle of the equalization cylinder (1) has an arc-shaped groove on its surface along the direction of airflow, and the tangent of the end of the arc-shaped groove faces the diversion channel of the diversion pipe (3) near the inner wall.

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