Windbreak device for main ventilation roadway spraying

Abstract

A kind of wind blocking device for main ventilation roadway spraying, wind shield body is streamline plate structure, the central region of length direction is outwardly curved and protruding, and the arc smooth transition between the two ends of length direction to central region;The two vertical end edges of the two ends of wind shield body length direction have upper arc end edge and lower arc end edge in the height direction, and the two vertical end edges and upper arc end edge form the outer contour end edge;Ventilation opening is set in wind shield body, and passage opening extended to lower arc end edge is set in lower part;The size of sealing door curtain is adapted to the size of passage opening, and is installed in the area where passage opening is located;Two vertical telescopic supports are respectively vertically supported below the two ends of wind shield body length direction, and the upper end of vertical telescopic support is fixedly connected with the lower end of wind shield body.The device can be matched with roadway to form ideal windless operation environment, and provide ideal hanging mortar environment for shotcreting operation through air-tight isolation.

Description

Technical Field

[0001] This utility model belongs to the technical field of underground construction and safety protection equipment in mines, specifically a windbreak device for spraying in main ventilation roadways. Background Technology

[0002] In underground mining operations such as coal and metal mining, continuous and stable ventilation is essential. However, these roadways often require shotcrete support to prevent weathering and detachment of the surrounding rock, seal cracks, and ensure long-term roadway stability. Currently, shotcrete operations in main ventilation roadways with high-speed airflow typically face two major challenges: First, the high-speed airflow disperses the sprayed slurry, preventing it from effectively adhering to the roadway walls. This not only results in significant material waste but also compromises support quality and creates a dusty working environment. Second, using traditional materials such as canvas and sheet metal for large-area obstruction to block airflow severely disrupts the normal airflow path within the roadway, generating substantial local ventilation resistance and affecting the stability and safety of the entire mine ventilation system—a practice prohibited under safety regulations.

[0003] Existing temporary windbreak measures generally suffer from drawbacks such as poor sealing, inconvenient installation and disassembly, and limited adaptability. They cannot completely isolate the airflow in the work area while minimizing the impact on the main ventilation system. Therefore, there is an urgent need in this field for a windbreak device that can effectively solve the above problems. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a windbreak device for spraying in main ventilation tunnels. The device has a reasonable structure, ideal sealing effect, and simple operation process. It can be used in conjunction with the tunnel to form an ideal windless working environment and provide an ideal slurry coating environment for spraying operations through airtight isolation.

[0005] To achieve the above objectives, this utility model provides a windbreak device for spraying in main ventilation tunnels, including a windbreak cover, an end sealing assembly, a sealing curtain, and a vertical telescopic support. The windshield is a streamlined plate-like structure with its central region protruding outward in an arc along its length, and the arc transitions smoothly between the two ends of the windshield and the central region. The windshield has two vertical end edges at both ends along its length and an upper arc end edge and a lower arc end edge at both ends along its height. The two vertical end edges and the upper arc end edge form the outer contour end edge. Ventilation openings are provided on the windshield, and a passage opening extending to the lower arc end edge is provided at its lower part. The end-edge sealing assembly includes a sealing airbag and a sealing skirt; the length of the sealing airbag is adapted to the length of the end edge of the outer contour of the windshield, and the sealing airbag is installed in the middle of the width direction of the outer contour of the windshield; the two sealing skirts are distributed opposite to each other on both sides of the sealing airbag and are installed at both ends of the width direction of the outer contour of the windshield. The size of the sealed door curtain is adapted to the size of the passageway and it is installed in the area where the passageway is located; Two vertical telescopic supports are respectively vertically installed below the two ends of the windshield body along its length, and the upper end of the vertical telescopic supports is fixedly connected to the lower end of the windshield body.

[0006] As a preferred embodiment, the outer contour end of the windshield is provided with a chamfered edge that slopes downwards from the outside and upwards from the inside, and a guide portion that slopes downwards from the outside and upwards from the inside is provided on its outer side.

[0007] In order to improve the fit with the part in contact with the roadway, and in order to guide the main airflow in the roadway smoothly and with low resistance from the outer surface of the windshield through a smooth transition structure, so as to minimize the ventilation resistance, the outer contour edge of the windshield is provided with a chamfer that slopes lower on the outside and lower on the inside.

[0008] To facilitate adjustment of the support height, the vertical telescopic support includes a threaded support column, a threaded sleeve, and a support base; the upper end of the threaded support column is fixedly connected to the lower end of the windshield; the threaded sleeve is fitted onto the outer side of the lower part of the threaded support column through a threaded fit; and the support base is connected to the lower end of the threaded sleeve through a hinge.

[0009] Furthermore, in order to facilitate lighting during operation and to facilitate the hanging of construction equipment such as shotcrete pipes to better assist shotcrete operations, lighting lamps and hooks are installed on the inner wall of the windshield.

[0010] To facilitate entry and exit, and to allow for easy and direct observation of the interior of the windshield, the sealed door curtain is made of a transparent, soft material.

[0011] To improve the sealing effect at the outer contour edge, the number of sealing airbags is multiple, and the multiple sealing airbags are distributed in parallel along the width direction of the outer contour edge of the windshield.

[0012] Preferably, the vent is located in the upper or middle region of the windshield.

[0013] To ensure a good seal and extend service life, the sealing skirt is made of rubber or a wear-resistant polymer material, with a width of 2-5mm and a smooth transition structure at its outer edge.

[0014] To balance structural strength and lightweight requirements, the windshield is made of flame-retardant polymer composite material with a thickness of 5-15mm.

[0015] In this invention, the windbreak cover is a streamlined plate-shaped structure with end-edge sealing components installed along its outer contour. When its two vertical ends are attached to the sidewall of the same roadway, the inflated sealing airbags within the end-edge sealing components can make sealed contact with the roadway surface, thus forming a windless working chamber isolated from external airflow inside the windbreak cover. This allows for shotcreting operations to be performed within the windless working chamber. The inflated sealing airbags can fully expand, effectively covering the uneven roadway wall and forming a reliable annular seal, ensuring the airtightness of the windless working chamber. Two sealing skirts are provided on both sides of the sealing airbag, allowing it to contact the roadway wall before inflation and sealing, serving as a guide, buffer, and protector for the airbag. Furthermore, due to its streamlined plate-shaped structure, placing it on one side of the roadway minimizes its impact on mine ventilation. By connecting two vertical telescopic supports at the lower ends of both sides of the windshield, the overall height can be flexibly adjusted to adapt to different roadway height requirements. This allows the device to be flexibly applied to various roadway cross-sections, significantly reducing the time required for installation, adjustment, and removal, and improving work efficiency. Simultaneously, it facilitates a tight fit between the upper arc end and the roadway roof, effectively supporting and fixing the windshield and achieving an effective seal at the upper edge. The ventilation openings provide normal ventilation for internal workers. The access openings and sealed door curtains facilitate the entry and exit of construction personnel and equipment. This invention achieves rigid airtight isolation of the work area by tightly fitting the sealed airbag to the roadway wall, completely solving the problem of slurry being blown away by the wind. It significantly improves the adhesion rate and work quality of shotcrete, saves materials, and improves the working environment. It also has minimal impact on the mine's main ventilation. It can be used as a temporary isolation device to effectively isolate airflow and ensure work quality. It can adapt to the local isolation needs of roadways with different cross-sectional shapes, and comprehensively improve the safety and convenience of shotcrete operations.

[0016] This device features a reasonable structure, ideal sealing effect, simple operation, strong adaptability, and quick deployment. It can work in conjunction with roadways to create an ideal windless working environment. Through its streamlined shape design, the ventilation resistance formed by the device in the roadway is much lower than that of traditional planar obstructions, minimizing the impact on the mine's main ventilation and fully ensuring the stable and safe operation of the mine's main ventilation system. At the same time, through airtight isolation, it provides an ideal environment for grouting operations, effectively solving the technical problems of grout being easily blown away by airflow, material waste, and ventilation obstruction under traditional obstruction methods, thus ensuring the effectiveness of grouting operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the vertical telescopic support structure in the utility model.

[0018] In the diagram: 1. Windshield cover, 2. Vertical telescopic support, 3. Passageway, 4. Ventilation opening, 5. Sealed door curtain, 6. End sealing assembly, 7. Sealed airbag, 8. Sealed skirt, 9. Magnetic strip, 10. Chamfer, 11. Threaded support, 12. Threaded sleeve, 13. Support base, 14. Hinge. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, this utility model provides a windbreak device for spraying in the main ventilation tunnel, including a windbreak cover 1, a sealing assembly 6, a sealing curtain 5, and a vertical telescopic support 2. The windproof cover 1 is a streamlined plate-like structure with its central area protruding outward in an arc shape along its length, and the arc transition between the two ends and the central area in the length direction is smooth. The windproof cover 1 has two vertical end edges at both ends in the length direction, and upper and lower arc-shaped end edges at both ends in the height direction. The two vertical end edges and the upper arc-shaped end edge form the outer contour end edge. The two vertical end edges are used to contact and cooperate with the side wall of the roadway on the same side, and the upper arc-shaped end edge is used to contact and cooperate with the roof of the roadway. The windproof cover 1 has a ventilation opening 4, and a passage opening 3 extending to the lower arc-shaped end edge is opened at its lower part. In this way, when the windproof cover 1 is attached to the roadway wall on the same side, a windless working chamber can be formed between the inside of the windproof cover 1 and the roadway wall. Ventilation port 4 is used to ventilate the windless work chamber when necessary, thereby improving the working environment.

[0021] In order to improve the sealing effect between the outer contour edge and the roadway sidewall and roof, the edge sealing assembly 6 includes a sealing airbag 7 and a sealing skirt 8. The length of the sealing airbag 7 is adapted to the length of the outer contour end of the windshield cover 1. The sealing airbag 7 is installed in the middle of the width direction of the outer contour end of the windshield cover 1 to achieve a seal between the cover and the inner wall of the roadway. Two sealing skirts 8 are distributed on both sides of the sealing airbag 7 and installed at both ends of the width direction of the outer contour end of the windshield cover 1. When the sealing airbag 7 is inflated, its outer surface can make close contact with the side wall of the roadway and the roof of the roadway, thus achieving an effective seal.

[0022] As a preferred option, the windshield cover 1 is also connected to a ventilation branch pipe with a control valve. The air outlet of the ventilation branch pipe is located inside the windshield cover 1, and its air inlet is located outside the windshield cover 1. By setting up the ventilation branch pipe with the control valve, the ventilation volume can be adjusted as needed to achieve controllable ventilation in the working chamber. In this way, when necessary, the formed windless working chamber can be ventilated in a controlled manner. Optionally, the control valve is a manual butterfly valve or an electric regulating valve.

[0023] The size of the sealed door curtain 5 is adapted to the size of the passageway 3, and it is installed in the area where the passageway 3 is located; Two vertical telescopic supports 2 are respectively vertically supported below the ends of the windshield 1 along its length, and the upper ends of the vertical telescopic supports 2 are fixedly connected to the lower ends of the windshield 1. To facilitate quick assembly and disassembly, the vertical telescopic supports 2 are connected to the lower ends of the windshield 1 through a threaded connection.

[0024] Preferably, the upper edge and both side edges of the sealing curtain 5 are connected to the iron frame fixed inside the passageway 3 via magnetic strips 9 to achieve a sealed connection. Alternatively, the sealing curtain 5 can also be connected to the inside of the passageway 3 using a zipper.

[0025] In order to improve the fit with the part in contact with the roadway, and in order to guide the main airflow in the roadway smoothly and with low resistance from the outer surface of the windproof cover through a smooth transition structure, so as to minimize the ventilation resistance, the outer contour end of the windproof cover 1 is provided with a chamfer 10 with an outer lower and inner higher slope along the inner side, and a guide part with an outer lower and inner higher slope is provided on its outer side.

[0026] To facilitate lighting during operations and to allow for the hanging of construction equipment such as shotcrete pipes, thus better supporting shotcrete work, lighting fixtures and hooks are installed on the inner wall of the windshield shroud 1. Optionally, the lighting fixtures are explosion-proof LED lights, providing illumination for operations at night or in low-light environments; the hooks facilitate the hanging of construction equipment such as shotcrete pipes, improving operational convenience.

[0027] To facilitate adjustment of the support height, the vertical telescopic support 2 includes a threaded support column 11, a threaded sleeve 12, and a support base 13; the upper end of the threaded support column 11 is fixedly connected to the lower end of the windshield cover 1; the threaded sleeve 12 is fitted onto the outer side of the lower part of the threaded support column 11 through a threaded fit; and the support base 13 is connected to the lower end of the threaded sleeve 12 through a hinge 14.

[0028] To enable efficient and convenient length adjustment, allowing the entire device to quickly adapt to roadways with different cross-sectional shapes and sizes, and facilitating easy erection and retraction, the vertical telescopic support 2 can also be configured as a combination of a pneumatic telescopic rod, a hinge 14, and a support base 13, or as a combination of a hydraulic telescopic rod, a hinge 14, and a support base 13.

[0029] As a preferred embodiment, the hinge 14 is made of stainless steel. More preferably, the hinge 14 can achieve angle adjustment within the range of 0-90° of the connected parts, so that the frame can adapt to roadways with different cross-sectional shapes, improve the adaptability of the device, and can effectively meet the support needs of different sites.

[0030] To facilitate entry and exit, and to allow for easy and direct observation of the interior of the windshield cover, the sealed door curtain 5 is made of a transparent soft material.

[0031] To improve the sealing effect at the outer contour edge, multiple sealing airbags 7 are provided, arranged in parallel along the width direction of the outer contour edge of the windshield 1. This creates multiple sealing protections, ensuring a seal even if a single sealing airbag fails, thus improving the reliability of the device. Preferably, three sealing airbags 7 are used.

[0032] As a preferred option, the vent 4 is located in the upper or middle part of the windshield 1 to facilitate air circulation and prevent dust accumulation at the bottom from affecting the ventilation effect.

[0033] To ensure a good seal and extend service life, the sealing skirt 8 is made of rubber or high-molecular wear-resistant material, with a width of 2-5mm and a smooth transition structure at its outer edge. This reduces frictional resistance with the tunnel wall and facilitates installation and positioning.

[0034] To balance structural strength and lightweight requirements, the windshield 1 is made of flame-retardant polymer composite material with a thickness of 5-15mm.

[0035] In use, first adjust the two vertical telescopic supports 2 to a support form that is compatible with the height of the roadway, hold the upper arc-shaped end of the windproof cover 1 against the top plate of the roadway, and make the two vertical ends fit tightly against the side wall of the roadway to initially position the windproof cover 1. Then inflate the sealing airbag 7 to achieve the predetermined sealing state at the direct contact part. In this way, a windless working chamber is formed between the windproof cover 1 and the roadway. Construction personnel can enter the windless working chamber through the passage 3 to carry out shotcreting operations.

[0036] In this invention, the windbreak cover is a streamlined plate-shaped structure with end-edge sealing components installed along its outer contour. When its two vertical ends are attached to the sidewall of the same roadway, the inflated sealing airbags within the end-edge sealing components can make sealed contact with the roadway surface, thus forming a windless working chamber isolated from external airflow inside the windbreak cover. This allows for shotcreting operations to be performed within the windless working chamber. The inflated sealing airbags can fully expand, effectively covering the uneven roadway wall and forming a reliable annular seal, ensuring the airtightness of the windless working chamber. Two sealing skirts are provided on both sides of the sealing airbag, allowing it to contact the roadway wall before inflation and sealing, serving as a guide, buffer, and protector for the airbag. Furthermore, due to its streamlined plate-shaped structure, placing it on one side of the roadway minimizes its impact on mine ventilation. By connecting two vertical telescopic supports at the lower ends of both sides of the windshield, the overall height can be flexibly adjusted to adapt to different roadway height requirements. This allows the device to be flexibly applied to various roadway cross-sections, significantly reducing the time required for installation, adjustment, and removal, and improving work efficiency. Simultaneously, it facilitates a tight fit between the upper arc end and the roadway roof, effectively supporting and fixing the windshield and achieving an effective seal at the upper edge. The ventilation openings provide normal ventilation for internal workers. The access openings and sealed door curtains facilitate the entry and exit of construction personnel and equipment. This invention achieves rigid airtight isolation of the work area by tightly fitting the sealed airbag to the roadway wall, completely solving the problem of slurry being blown away by the wind. It significantly improves the adhesion rate and work quality of shotcrete, saves materials, and improves the working environment. It also has minimal impact on the mine's main ventilation. It can be used as a temporary isolation device to effectively isolate airflow and ensure work quality. It can adapt to the local isolation needs of roadways with different cross-sectional shapes, and comprehensively improve the safety and convenience of shotcrete operations.

[0037] This device features a reasonable structure, ideal sealing effect, simple operation, strong adaptability, and quick deployment. It can work in conjunction with roadways to create an ideal windless working environment. Through its streamlined shape design, the ventilation resistance formed by the device in the roadway is much lower than that of traditional planar obstructions, minimizing the impact on the mine's main ventilation and fully ensuring the stable and safe operation of the mine's main ventilation system. At the same time, through airtight isolation, it provides an ideal environment for grouting operations, effectively solving the technical problems of grout being easily blown away by airflow, material waste, and ventilation obstruction under traditional obstruction methods, thus ensuring the effectiveness of grouting operations.

Claims

1. A windbreak device for spraying in a main ventilation tunnel, comprising a windbreak cover (1), characterized in that, It also includes an end edge sealing assembly (6), a sealing curtain (5), and a vertical telescopic support (2); The windshield cover (1) is a streamlined plate-shaped structure. Its central area in the length direction protrudes outward in an arc shape, and the two ends in the length direction are smoothly transitioned to the central area in an arc shape. The windshield cover (1) has two vertical end edges at both ends in the length direction, and two upper arc end edges and lower arc end edges at both ends in the height direction. The two vertical end edges and the upper arc end edge form the outer contour end edge. The windshield cover (1) is provided with a ventilation opening (4), and a passage opening (3) extending to the lower arc end edge is provided at its lower part. The end sealing assembly (6) includes a sealing airbag (7) and a sealing skirt (8); the length of the sealing airbag (7) is adapted to the length of the outer contour end edge of the windshield (1), and the sealing airbag (7) is installed in the middle of the outer contour end of the windshield (1) along the width direction; the two sealing skirts (8) are distributed opposite to each other on both sides of the sealing airbag (7) and are installed at both ends of the outer contour end of the windshield (1) along the width direction. The size of the sealed door curtain (5) is adapted to the size of the passage (3) and is installed in the area where the passage (3) is located; Two vertical telescopic supports (2) are respectively vertically supported below the two ends of the windshield cover (1) along its length, and the upper end of the vertical telescopic support (2) is fixedly connected to the lower end of the windshield cover (1).

2. The windbreak device for spraying in a main ventilation tunnel according to claim 1, characterized in that, The upper edge and both sides of the sealed door curtain (5) are connected to the iron frame fixed inside the passage (3) by magnetic strips (9).

3. A windbreak device for spraying in a main ventilation tunnel according to claim 2, characterized in that, The windshield cover (1) has a chamfer (10) with an outer lower and inner higher slope along the inner side of its outer contour end, and a guide section with an outer lower and inner higher slope is provided on its outer side.

4. A windbreak device for spraying in a main ventilation tunnel according to claim 3, characterized in that, The vertical telescopic support (2) includes a threaded support column (11), a threaded sleeve (12), and a support base (13); the upper end of the threaded support column (11) is fixedly connected to the lower end of the windshield cover (1); the threaded sleeve (12) is fitted onto the outer side of the lower part of the threaded support column (11) through a threaded fit; the support base (13) is connected to the lower end of the threaded sleeve (12) through a hinge (14).

5. A windbreak device for spraying in a main ventilation tunnel according to claim 4, characterized in that, Lighting lamps and hooks are installed on the inner wall of the windshield cover (1).

6. A windbreak device for spraying in a main ventilation tunnel according to claim 5, characterized in that, The sealed door curtain (5) is made of transparent soft material.

7. A windbreak device for spraying in a main ventilation tunnel according to claim 2, characterized in that, The number of the sealing airbags (7) is multiple, and the multiple sealing airbags (7) are distributed in parallel along the width direction of the outer contour end of the windshield (1).

8. A windbreak device for spraying in a main ventilation tunnel according to claim 1, characterized in that, The ventilation opening (4) is located in the upper or middle area of ​​the windshield cover (1).

9. A windbreak device for spraying in a main ventilation tunnel according to claim 2, characterized in that, The sealing skirt (8) is made of rubber or polymer wear-resistant material, with a width of 2-5mm and a smooth transition structure at its outer edge.

10. A windbreak device for spraying in a main ventilation tunnel according to claim 1, characterized in that, The windshield cover (1) is made of flame-retardant polymer composite material with a thickness of 5-15mm.

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