In the course of mining operations regularly arises the need of transportation of various cargos. The need for this may arise both vertical and horizontal planes. In this situation traction winch is considered the most universal mechanism. It can act as an independent equipment and enter into equipment other lifting mechanisms.
Requirements for winches used in the mining works
Note that the main purpose of the winch in creating traction. It follows from this that as an independent mechanism, it can be used to move cargo in planes close to the horizontal (inclined drifts and tunnels). In this case, it is equipped with a drum for reeling the cable of higher capacity.
To move cargo vertical pull winch is mainly used in the kit with gear, which by changing the gear ratios, allows to operate with weights greater than the force developed a winch.
mining operation used the winch with manual, hydraulic or electric clock drive. Of course the greatest power have the latter two. As for the actuator, in terms of its use in mines and mine workings, hazardous gas and dust, the latter must be made explosion-proof.
Requirements for traction winches are used as haulage and shunting equipment is given in GOST 55158-2012. According to paragraph 4.2.2, these mechanisms are guaranteed to provide:the
- transport from the surface to the installation site without full or partial disassembly; the
- the installation as to the Foundation and directly to mountain tunnel; the
- required pulling force and the winding speed of the rope; the
- reverse directions of movement; the
- safety due to the presence of the necessary locks.
easy maintenance and planned repairs.
Also in paragraph 4.2.4 of the document there is a limit on the width of the traction winch, used in mining operations — it should not exceed 950 mm. It is necessary for the unimpeded delivery of the equipment to the place of installation in confined conditions of underground workings.
When choosing the winch for use in mining operations it is necessary to pay attention to the conditions in which its application was acceptable. So the letter "T" in the marking indicates that the equipment can be used at ambient temperatures from -40 °C to + 35 °C. If the marking is present, the index "T", these winches do not operate at temperatures below zero.