A self-responsive reverse flow baffle assembly for a luge hole

Abstract

The utility model discloses a kind of anti-backflow baffle assemblies of slide hole that can automatically respond, including support rod, press bar, trigger plate, first fixed pulley, second fixed pulley, baffle, bolt and pull rope, support rod is hollow, one end is fixedly connected with air wall or air door, the other end is suspended, support rod lower portion is provided with bolt hole;Press bar is inserted in support rod inside from the suspended end of support rod;Trigger plate is vertically fixedly connected to the end of press bar away from support rod;First fixed pulley and second fixed pulley are both fixedly connected to the lower portion of support rod;Baffle is parallel with the wall surface of air wall or air door and abuts;One end of pull rope is fixedly connected with the middle of baffle top, the other end is sequentially fixedly connected with bolt after passing through first fixed pulley and second fixed pulley.The device can automatically respond wind flow backflow abnormal situation, effectively block backflow air pressure, guarantee roadway ventilation stability and safety.

Description

Technical Field

[0001] This utility model relates to the field of mine ventilation safety technology, and in particular to an automatic response anti-backflow baffle assembly for chutes. Background Technology

[0002] In underground coal mine production, the ventilation system is the lifeline for ensuring safe production, preventing gas accumulation, and reducing dust concentration. To ensure airflow follows a predetermined path, ventilation structures such as dampers are typically installed to isolate or guide the airflow and create the necessary pressure difference.

[0003] Scraper conveyors, commonly known as chutes, are key equipment for coal transportation. To achieve continuous coal transport without compromising the overall structure of the air intake, existing technologies typically incorporate a dedicated channel, or chute opening, in the air intake wall or air intake. This opening allows the scraper conveyor body to transport coal from one side of the air intake to the other as it passes through the air intake.

[0004] Because a stable ventilation pressure difference typically exists on both sides of the ventilation door, the existence of the chute forms a short-circuit channel connecting high and low pressure areas. Ideally, the airflow through the chute opening should remain stable and in a fixed direction. However, due to the special location of the chute opening, the actual flow cross-section at the opening is dynamically changing. This change makes it very easy for backflow, or reverse flow, to occur during coal transportation. Furthermore, backflow can also occur when sudden accidents such as gas explosions or coal outbursts happen in the coal mining roadways. Backflow significantly reduces the effective ventilation volume, leading to insufficient airflow in critical areas such as the working face and roadways. Especially in coal and gas outburst mines, the inability to effectively dilute and remove harmful gases such as methane can cause safety accidents. Utility Model Content

[0005] Therefore, it is necessary to provide an automatically responsive anti-backflow baffle assembly for chutes, which can automatically respond to abnormal backflow conditions, effectively block backflow pressure, and ensure stable and safe ventilation in the chutes.

[0006] This utility model provides an automatically responsive anti-backflow baffle assembly for a chute entrance, which is installed on the side of the chute entrance prone to backflow, including: The support rod is set perpendicular to the wind wall or wind door. The support rod is hollow, with one end fixedly connected to the wind wall or wind door and the other end suspended in the air. A pin hole is provided at the bottom of the support rod. The pressure rod is inserted into the support rod from the suspended end of the support rod; The trigger plate is vertically fixed to the end of the pressure rod away from the support rod. The first fixed pulley and the second fixed pulley are both fixedly connected to the bottom of the support rod. The first fixed pulley is located near the wind wall or wind door, and the second fixed pulley is located near the trigger plate. The pin hole is located between the first fixed pulley and the second fixed pulley, and is located near the first fixed pulley. A baffle that can cover the opening of the sluice gate, the baffle being parallel to and abutting against the wall of the wind wall or wind door; A pin that can be inserted into a pin hole; A pull rope is provided, with one end fixedly connected to the middle of the top of the baffle, and the other end passing through the first and second fixed pulleys in sequence before being fixedly connected to the pin.

[0007] In one embodiment, the pin includes a U-shaped segment and a straight segment, wherein the included angle between one end of the straight segment and the U-shaped segment is less than or equal to 90°.

[0008] In one embodiment, the distance from the pin hole to the second fixed pulley is greater than the vertical height of the chute opening.

[0009] In one embodiment, the length of the pressure rod is greater than the distance from the pin hole to the suspended end of the support rod.

[0010] In one embodiment, the area of ​​the baffle is larger than the area of ​​the chute opening.

[0011] In one embodiment, the pressure bar and trigger plate are made of polyetheretherketone or polytetrafluoroethylene.

[0012] The beneficial effects of this utility model are as follows: The automatically responsive anti-backflow baffle assembly for chute openings is installed at the chute opening. In use, pulling the pin inserts it into the pin hole, positioning the baffle above the chute opening, where it remains locked under normal conditions. When backflow occurs, the airflow blows the trigger plate towards the support rod. When the impact force is large enough, it pushes the pin out of the pin hole, causing the baffle to lose its rope traction and fall rapidly under its own weight, automatically adapting to and closing the chute opening, effectively blocking backflow pressure, and ensuring stable and safe ventilation in the roadway. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of the automatically responsive anti-backflow baffle assembly for the chute provided in this embodiment of the utility model.

[0014] Explanation of reference numerals in the attached drawings: 100, support rod; 200, pressure rod; 300, pin hole; 400, trigger plate; 500, first fixed pulley; 600, second fixed pulley; 700, baffle; 800, pin; 900, pull rope. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] It should be noted that in the description of this utility model, "upper," "lower," "top," "bottom," and orientation or positional relationship are based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In one embodiment, such as Figure 1 As shown, the automatically responsive anti-backflow baffle assembly for the chute opening in this embodiment is installed on the side of the chute opening where backflow is likely to occur, and includes: The support rod 100 is set perpendicular to the wind wall or the wind door. The support rod 100 is hollow, with one end fixedly connected to the wind wall or the wind door and the other end suspended in the air. A pin hole 300 is provided at the bottom of the support rod 100.

[0018] A connecting hole can be drilled in the air wall or air damper to insert the support rod 100. Specifically, the pin hole 300 is strip-shaped.

[0019] A pressure rod 200 is inserted into the support rod 100 from the suspended end of the support rod 100.

[0020] A trigger plate 400 is vertically fixed to the end of the pressure rod 200 away from the support rod 100. The function of the trigger plate 400 is to push the pressure rod 200 to slide inward into the support rod 100.

[0021] Preferably, the pressure rod 200 and the trigger plate 400 are made of polyetheretherketone or polytetrafluoroethylene. These two materials are lightweight, which increases the response speed and sensitivity, and have good corrosion resistance.

[0022] The first fixed pulley 500 and the second fixed pulley 600 are both fixedly connected to the bottom of the support rod 100. The first fixed pulley 500 is set near the wind wall or wind door, and the second fixed pulley 600 is set near the trigger plate 400. The pin hole 300 is located between the first fixed pulley 500 and the second fixed pulley 600, and is set near the first fixed pulley 500.

[0023] In order to ensure that the baffle 700 fits tightly against the chute opening, the air wall or air door is provided with a first fixed pulley 500 mounting cavity.

[0024] In this embodiment, the distance from the pin hole 300 to the second fixed pulley 600 is greater than the vertical height of the chute opening, and the area of ​​the baffle 700 is greater than the area of ​​the chute opening, ensuring that the falling height of the baffle 700 can cover the entire chute opening. The length of the pressure rod 200 is greater than the distance from the pin hole 300 to the suspended end of the support rod 100, ensuring that the pressure rod 200 can press the pin 800 out of the pin hole 300.

[0025] A baffle 700 can cover the chute opening. The baffle 700 is parallel to and abuts against the wall of the wind wall or wind door. It can slide relative to the wall of the wind wall or wind door. The abutment can reduce the gap between the baffle 700 and the chute opening and increase the degree of sealing of the chute opening.

[0026] A pin 800 can be inserted into a pin hole 300. The function of the lever 200 is to push the pin 800 out of the pin hole 300.

[0027] Specifically, in this embodiment, the pin 800 includes a U-shaped segment and a straight segment, and the included angle between one end of the straight segment and the U-shaped segment is less than or equal to 90°. The included angle between the straight segment and the U-shaped segment allows the pin 800 to be hooked into the pin hole 300. When the pin 800 is inserted into the pin hole 300, the straight segment faces the trigger plate 400.

[0028] Pull rope 900, one end of which is fixedly connected to the middle of the top of baffle 700, and the other end is fixedly connected to pin 800 after passing through first fixed pulley 500 and second fixed pulley 600 in sequence.

[0029] It should be noted that, during the installation of the device in this embodiment, the height of the support rod 100, the length of the pull rope 900, and the distance between the first fixed pulley 500 and the second fixed pulley 600 must be coordinated to meet the following requirements: before the baffle 700 falls, it is located above the chute opening, and after the baffle 700 falls, it can completely cover the chute opening.

[0030] In this embodiment, when the device is in use, pulling the pull rope 900 engages the pin 800 in the pin hole 300, raising the baffle 700 above the chute opening. Simultaneously, the position of the pressure rod 200 is adjusted so that its front end is approximately 10cm from the pin hole 300. When the trigger plate 400 is subjected to the impact of backflow or turbulent airflow, it pushes the pressure rod 200 towards the support rod 100, thereby causing the pin 800 to detach from the pin hole 300. The pull rope 900 then loosens, and the baffle 700, no longer restrained by the pull rope 900, falls rapidly under gravity, automatically closing the chute opening and forming a physical barrier. This effectively blocks the backflow air pressure, ensuring stable and safe ventilation in the roadway. After the backflow or turbulent airflow stops, simply reset the baffle 700 and reinsert the pin; the operation is simple and does not affect production.

[0031] This automatically responsive anti-backflow baffle assembly for chutes requires no electrical control; it achieves automatic response through mechanical structural linkage, adapts to complex downhole environments, and is easy to install and maintain.

[0032] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An automatically responsive anti-backflow baffle assembly for a chute, characterized in that, Located on the side of the sluice gate entrance where backflow of air is likely to occur, including: A support rod (100) is provided, which is perpendicular to the wind wall or the wind door. The support rod (100) is hollow, with one end fixedly connected to the wind wall or the wind door and the other end suspended in the air. A pin hole (300) is provided below the support rod (100). A pressure rod (200) is inserted into the support rod (100) from one of its suspended ends; A trigger plate (400) is vertically fixed to one end of the pressure rod (200) away from the support rod (100); The first fixed pulley (500) and the second fixed pulley (600) are both fixedly connected to the support rod (100) below. The first fixed pulley (500) is located near the wind wall or wind door, and the second fixed pulley (600) is located near the trigger plate (400). The pin hole (300) is located between the first fixed pulley (500) and the second fixed pulley (600) and is located near the first fixed pulley (500). A baffle (700) that can cover the opening of the chute, the baffle (700) being parallel to and abutting against the wall of the wind wall or wind door; A pin (800) that can be inserted into the pin hole (300); A pull rope (900) is provided, one end of which is fixedly connected to the middle of the top of the baffle (700), and the other end is fixedly connected to the pin (800) after passing through the first fixed pulley (500) and the second fixed pulley (600) in sequence.

2. The automatically responsive anti-backflow baffle assembly for chutes according to claim 1, characterized in that, The pin (800) includes a U-shaped segment and a straight segment, wherein the included angle between the straight segment and one end of the U-shaped segment is less than or equal to 90°.

3. The automatically responsive anti-backflow baffle assembly for chutes according to claim 2, characterized in that, The distance from the pin hole (300) to the second fixed pulley (600) is greater than the vertical height of the chute opening.

4. The automatically responsive anti-backflow baffle assembly for chutes according to claim 3, characterized in that, The length of the pressure rod (200) is greater than the distance from the pin hole (300) to the suspended end of the support rod (100).

5. The automatically responsive anti-backflow baffle assembly for chutes according to claim 4, characterized in that, The area of ​​the baffle (700) is larger than the area of ​​the sluice gate opening.

6. The automatically responsive anti-backflow baffle assembly for chutes according to claim 5, characterized in that, The pressure bar (200) and trigger plate (400) are made of polyetheretherketone or polytetrafluoroethylene.

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