Folding type forepoling device convenient to move

Abstract

The invention relates to a folding type forepoling device convenient to move. At present, coal mine underground forepoling equipment is difficult to move, tedious to operate and poor in supporting effect. The folding type vehicle-mounted forepoling device comprises a mining transport vehicle, a left folding supporting assembly, a right folding supporting assembly and a supporting top frame. The supporting top frame is connected with the upper portions of the left folding assembly and the right folding assembly through two long cross-shaped hinge joints and two short cross-shaped hinge joints, and the lower portions of the left folding assembly and the right folding assembly are hinged to the mining transport vehicle. The left folding assembly and the right folding assembly comprise folding hydraulic cylinders, lifting hydraulic cylinders, supporting hydraulic cylinders, lifting outer stand columns, lifting inner stand columns, the long cross-shaped hinge joints and the short cross-shaped hinge joints; a cylinder barrel of each folding hydraulic cylinder is hinged to the transport vehicle, and a piston rod is hinged to the corresponding lifting outer stand column to drive the forepoling device to be folded; the bottom of each lifting outer stand column is hinged to the transport vehicle, the corresponding lifting inner stand column is sleeved with the lifting outer stand column, and the corresponding lifting hydraulic cylinder is installed inside to drive the supporting top frame to ascend and descend; a cylinder barrel of each supporting hydraulic cylinder is hinged to the bottom of the corresponding inner stand column, and a piston rod of the supporting hydraulic cylinder is hinged to the corresponding short cross-shaped hinge joint and takes supporting and overturning effects on the supporting top frame; and the supporting top frame comprises a main supporting frame, a front end expansion support, bilateral expansion supports, a front stretching hydraulic cylinder and a left-right side stretching hydraulic cylinder, and the bilateral expansion supports and the front end expansion support are installed in the main frame and driven by the hydraulic cylinders connected with the bilateral expansion supports to stretch out and retract in a sliding mode. According to the invention, rapid, simple and convenient multi-angle large-area supporting can be implemented on an irregular empty roof region which is just tunneled.

Description

technical field [0001] The invention relates to the advance temporary support of the empty roof area after coal mine roadway excavation and development, in particular to a foldable advance support device which is easy to move. Background technique [0002] After the coal mine roadway in our country is cut by the roadheader, there will be an unsupported goaf between the roadheader and the working face. Rockfall or even roof fall accidents often occur and injure staff. In the coal mine safety operating regulations, it is clearly stipulated that empty top operations are strictly prohibited, and some common temporary support methods are generally cumbersome and time-consuming. [0003] At present, there is also the use of airborne temporary advance support, but it has not been widely promoted and applied. It is considered that this product is immature and has the following problems. 1. Airborne temporary advance support is only suitable for relatively flat roofs, and it is dif...

AI Technical Summary

Problems solved by technology

1. Airborne temporary advance support is only suitable for relatively flat roofs, and it is difficult to adapt to roof structures in different situations such as sharp roofs, inclined roofs, and corrugated roofs; The roof of the excavation is supported by the full section; 3. Most of them are not perfectly combined with the roadheader, and the volume is relatively large after folding, which affects the cutting line of sight of the roadheader driver and brings inconvenience to the operation; 4. Make the structure of the roadheader more Complicated, occupying the power of the roadheader, affecting the performance of the roadheader, and difficult to adapt to the current development level of coal mines

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