CS225548B1 - Air-operated separating rod - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tear bar comprising a tube, a retractable tip, an actuating member and an air connection.

Until now, the ceiling and walls of the mine workings were mostly torn by hand with bars of different constructions. Mechanical rupture devices have also been developed, the working bodies of which are mostly operated hydraulically on manipulators and which impact on partially released rock in the ceiling and walls of the mine.

Manual mining of mine workings is fully dependent on the physical abilities of the worker. This work is very strenuous, especially in deep mines, where the temperature of the growing rock and the atmosphere in the mine workings increase with increasing depth. Occupational accidents are often caused by the fall of the rock or loss of stability of the tear-off worker. A number of heavy mechanisms have been developed for mechanical plucking which, due to their robustness, are only suitable for working in mine workings that are bulky and connected by mutually bulky mining parts.

However, they cannot be used in all cases.

These drawbacks are largely overcome by the pneumatic tear bar according to the invention, which consists in the fact that in the pipe provided with openings for the blowing off of compressed air, a retractable tip is slidably mounted at one end. A recess is provided on the retractable tip, which fits a double stop with a split pin. The tube is also loosely stored firing pin. The path of movement of the firing pin is defined both by the foot of the extendable tip and by the trigger element, which is located at the other end of the tube.

The pneumatic tear bar according to the invention can be used both as a manual tear bar and can be installed on drill wagons and drill columns when made in a more robust

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225 548 version. Its production is as simple as its control. Since the pneumatic tear bar can be fitted exactly to the point where the blow is to be applied, the tearing quality improves while reducing the labor intensity. The use of a pneumatic tear bar is also advantageous from the standpoint of occupational safety, since injuries caused by the loss of stability of the worker during tearing have disappeared. In combination with the lifting platform or increasing the length of the pneumatic tear bar, this bar can also be used to tear down the ceiling and walls of large-scale mine workings.

The accompanying drawings show schematically one embodiment of a pneumatic tear bar according to the invention.

Fig. 1 is a front elevation view of the pneumatic tear bar; Fig. 2 is a sectional plan view of a double stop of the retractable tip; and Fig. 3 is a cross-sectional front view of the pneumatic tear bar. Giant. 4 is a perpendicular sectional view at point A, revealing the profile of the tube, the stop, the retractable tip in the recess, and the securing pins. Fig. 5 is a cross-sectional view at point B showing the firing pin in the tube.

The pneumatic tear bar consists of a tube 10 of rectangular or circular profile which, at the point of impact of the firing pin 30 on the shoe 22 of the retractable tip 20, is provided with openings 11 for blowing compressed air. At one end of the tube 10, a retractable tip 20 is slidably mounted, on which a recess 21 is received, in which a double stop 12 fitted with a cotter pin 13 is provided. The tube 10 furthermore freely accommodates a firing pin 30. The path of movement of the firing pin 30 in the tube 10 is delimited both by the foot 22 of the retractable tip 20 and by the trigger element 14 located at the opposite end of the tube 10 where the air connection 15 is also provided.

The operator attaches a compressed air hose to the air connection 15 of the pneumatic tear bar. It then pushes the retractable tip 20 of the pneumatic tear bar into the joint in the ceiling or wall of the mine and pushes the retractable tip 20 into the pipe 10 with slight pressure. The firing pin 30 is located at the opposite, i.e. lower end, of the pipe V0. Press the trigger

225 548, a pressurized air is blown into the tube 10 which drives the firing pin 10 to the upper end of the tube 10 where it strikes at a high speed a bead 22 of the retractable spike 20 which breaks and knocks the released rock. The air discharged by the firing pin 10 escapes from the pipe 10 through the apertures 11 for blowing off the compressed air. By releasing the firing element 14, the firing pin 30 falls under its own weight and reflection into the lower part of the tube 10 up to the firing element 14. »The discharged air escapes along the perimeter of the firing pin 30 through the opening in the firing element 14. per second. Single strike action is necessary as the operator needs to see the effect of each strike in order to either continue strikes or release the rock as needed. Individual strokes can be repeated as needed and according to the worker's experience. When tearing in the horizontal position of the pneumatic tear bar, it is necessary to combine the return of the firing pin 10 with raising the pneumatic tear bar to such a position that the firing pin 30 drops to the trigger element 14.

The pneumatic tear bar is designed for manual and mechanized tearing of ceilings and walls of tunnels, corridors or other underground spaces.

Claims (1)

SUBJECT OF THE INVENTION 225 548 Pneumatic tear bar, consisting of a tube, a retractable tip, a trigger element and an air connection, characterized in that in the tube (10) provided with compressed air vent holes (11), a retractable tip (20) is slidably mounted at one end. provided with a recess (21) in which a double stop (12) provided with a cotter pin (13) is provided, the tube (10) further comprising a firing pin (30) whose path of movement is defined by the foot (22) of the extendable tip (20), and a trigger element (14) located at the other end of the tube (10).