Coal mine underground air bridge device

Abstract

The utility model discloses a coal mine underground air bridge device which comprises a square annular groove with an opening in the top end, anchor rods are anchored to the top end and the side face of an air inlet roadway and extend into the annular groove, concrete is poured into the annular groove, a sealing table with a T-shaped cross section is inserted into the center of the annular groove, and the sealing table is connected with a sealing groove in a sleeved mode. A sealing ring is arranged between the sealing table and the annular groove, and a plurality of hydraulic stand columns are connected to the sealing table. The air bridge has the advantages that the square annular groove is designed, the outer portion of the annular groove is connected with a roadway in an anchoring mode and combined with concrete, the inner portion of the annular groove and the sealing boss are of a detachable mechanical sealing structure, the sealing performance of the air bridge is improved, the sealing boss, the hydraulic stand column and other components are detachable and recoverable, and the service life of the air bridge is prolonged. Meanwhile, the foldable center hydraulic stand column is designed at the bottom of the air bridge, the passing requirement can be met, the large load capacity can be guaranteed, and the air bridge is worthy of large-range application and popularization.

Description

Technical field:

[0001] The utility model relates to the technical field of underground wind bridges in coal mines, in particular to an underground wind bridge device in coal mines. Background technology:

[0002] A wind bridge refers to a ventilation structure that separates fresh air from dirty air when the air inlet and return ducts intersect in a ventilation system. Traditional wind bridges are built of stone masonry, which requires blasting or manual excavation of walls, and then manual masonry of stone walls. I-beams are installed above the walls, cement covers are laid above the I-beams, and loess is laid above the cement covers. Finally, the wind bridge is sprayed from top to bottom. This type of wind bridge has not only complex construction technology, large transportation volume, and long construction period, but also cannot be reused. Many wind bridges do not have a long service life, resulting in a waste of resources. For this reason, hydraulic support or crawler wind bridges have appeared on the market. The crawler wind bridge is too expensive, and although the hydraulic support wind bridge can be reused, the sealing at the junction with the tunnel is poor and it is easy to leak air. In addition, due to the need for traffic in the tunnel, the hydraulic columns of the hydraulic support wind bridge are mainly located at the edge, with limited load-bearing capacity, and are easily deformed during rail transportation or rubber-wheeled vehicle transportation on the upper part of the wind bridge. It is difficult to meet the transportation of heavy materials. Utility model content:

[0003] The utility model aims to provide an underground wind bridge device in a coal mine to solve the technical problems that the wind bridge in the prior art cannot be reused, has poor bearing capacity and is prone to air leakage.

[0004] The content of the utility model: A wind bridge device in an underground coal mine, comprising a square annular groove with an opening at the top, anchor rods anchored at the top and sides of an air inlet tunnel, the anchor rods extending into the annular groove, the annular groove being located at the junction of the air inlet tunnel and the return air tunnel, concrete poured in the annular groove, a sealing platform with a T-shaped cross section inserted in the center of the annular groove, a sealing ring arranged between the sealing platform and the annular groove, a plurality of hydraulic columns connected to the sealing platform, and the hydraulic columns mounted on a base plate.

[0005] Furthermore, a plurality of notch grooves are provided on the outer edge of the annular groove, and the notch grooves are used for placing the anchor rods.

[0006] Furthermore, one end of the anchor rod is a cross frame, and the cross frame is located in the annular groove.

[0007] Furthermore, a plurality of central hydraulic columns are hinged at the bottom center of the sealing platform, and a magnet block is installed on the piston rod of the central hydraulic column, and the magnet block is used for magnetically adsorbing the sealing platform.

[0008] Furthermore, a sealing groove is provided on the side wall of the sealing platform, and the sealing ring is installed in the sealing groove.

[0009] Furthermore, a grouting hole is opened on the outer wall of the annular groove.

[0010] The beneficial effects of the utility model are as follows: the utility model designs a square ring groove, and the outside of the ring groove is connected to the lane by anchoring and concrete, and the inside of the ring groove and the sealing boss are connected by a detachable mechanical sealing structure, which improves the sealing performance of the wind bridge and makes the sealing boss, hydraulic columns and other components detachable and recyclable, saving resources. At the same time, a foldable central hydraulic column is designed at the bottom of the wind bridge, which can meet the traffic needs and ensure a large load capacity, and is worthy of large-scale promotion and use. Description of the drawings:

[0011] Figure 1 It is a top view of the utility model;

[0012] Figure 2 It is a cross-sectional view of the utility model;

[0013] Figure 3 It is a three-dimensional diagram of the utility model;

[0014] Figure 4 It is a stereoscopic diagram from other viewing angles of the present utility model;

[0015] In the figure, there are air inlet tunnel 1, return air tunnel 2, annular groove 3, anchor rod 4, notch groove 5, sealing platform 6, hydraulic column 7, central hydraulic column 8, bottom plate 9, grouting hole 11, cross frame 13, magnet block 14, and sealing ring 15. Specific implementation method:

[0016] like Figures 1 to 3 As shown, a wind bridge device for underground coal mine comprises a square annular groove 3 with an opening at the top, anchor rods 4 are anchored at the top and side of the air inlet tunnel 1, the anchor rods 4 extend into the annular groove 3, the annular groove 3 is located at the junction of the air inlet tunnel 1 and the return air tunnel 2, concrete is poured in the annular groove 3, a sealing platform 6 with a T-shaped cross section is inserted in the center of the annular groove 3, a sealing ring 15 is arranged between the sealing platform 6 and the annular groove 3, a plurality of hydraulic columns 7 are connected to the sealing platform 6, and the hydraulic columns 7 are installed on the bottom plate 9; a plurality of notch grooves 5 are opened on the outer edge of the annular groove 3, and the notch grooves 5 are used to place the anchor rods 4.

[0017] In order to improve the pull-out performance of anchor rods, Figure 1 As shown, one end of the anchor rod 4 is a cross frame 13 , and the cross frame 13 is located in the annular groove 3 .

[0018] like Figure 4As shown, in order to improve the load-bearing performance, a plurality of central hydraulic columns 8 are hinged at the bottom center of the sealing platform 6, and a magnet block 14 is installed on the piston rod of the central hydraulic column 8, and the magnet block 14 is used for magnetically adsorbing the sealing platform 6.

[0019] like Figure 3 As shown, a sealing groove is provided on the side wall of the sealing platform 6 , and the sealing ring 15 is installed in the sealing groove; and a grouting hole 11 is provided on the outer wall of the ring groove 3 .

[0020] During the specific construction, Figure 1 and Figure 2 As shown, firstly, anchor rods 4 are constructed at the junction of the air inlet tunnel 1 and the return air tunnel 2 (the anchor rods 4 can be arranged horizontally or vertically), and then the annular groove 3 is placed on the sealing platform 6, and the hydraulic column 7 is started to raise the annular groove 3 to the set position. At this time, the anchor rod 4 is extended into the annular groove 3, and then grouting is performed at the position of the grouting hole 11, so that the annular groove 3 is connected with the tunnel, and the sealing effect is good without air leakage. When a heavy vehicle passes on the wind bridge, the central hydraulic column 8 can be rotated to keep it upright, and the central hydraulic column 8 can be started to push out the piston rod for temporary support to improve the bearing capacity; when the wind bridge service expires, it only needs to start the hydraulic column 7 to retract the piston rod, and all components except the annular groove 3 can be recycled and reused, saving resources.

[0021] The above are only preferred examples of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind bridge device for underground coal mine, characterized in that: It comprises a square annular groove (3) with an opening at the top, anchor rods (4) are anchored at the top and side of the air inlet tunnel (1), the anchor rods (4) extend into the annular groove (3), the annular groove (3) is located at the junction of the air inlet tunnel (1) and the return air tunnel (2), concrete is poured in the annular groove (3), a sealing platform (6) with a T-shaped cross section is inserted in the center of the annular groove (3), a sealing ring (15) is arranged between the sealing platform (6) and the annular groove (3), a plurality of hydraulic columns (7) are connected to the sealing platform (6), and the hydraulic columns (7) are installed on a base plate (9).

2. The wind bridge device for underground coal mine according to claim 1, characterized in that: A plurality of notch grooves (5) are provided on the outer edge of the annular groove (3), and the notch grooves (5) are used to place the anchor rods (4).

3. The wind bridge device for underground coal mine according to claim 1, characterized in that: One end of the anchor rod (4) is a cross-shaped frame (13), and the cross-shaped frame (13) is located in the annular groove (3).

4. The wind bridge device for underground coal mine according to claim 1, characterized in that: A plurality of central hydraulic columns (8) are hinged at the bottom center of the sealing platform (6), and a magnet block (14) is installed on the piston rod of the central hydraulic column (8). The magnet block (14) is used to magnetically adsorb the sealing platform (6).

5. The wind bridge device for underground coal mine according to claim 1, characterized in that: A sealing groove is provided on the side wall of the sealing platform (6), and the sealing ring (15) is installed in the sealing groove.

6. The wind bridge device for underground coal mine according to claim 1, characterized in that: A grouting hole (11) is provided on the outer wall of the annular groove (3).

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