RU2449939C2 - Method of replacing inhaul cable of multi-cable cableway and special device to this end - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to mining, particularly, to multi-cable cableways. Proposed method comprises installing mounting bridge 3 to suspend top end of cable 6 and clamp it thereon by clamp 4 on device 5 outside of lifting vessel travel zone. Reel 8 with cable 6 is lowered on lifting vessel 1 into trunk by unwinding cable into trunk while second end of cable 6 is clamped at trunk bottom outside of lifting vessel travel zone. Similarly, all cables are arranged in said trunk. Clamps are fitted on gin cables to be replaced. Cable ends are released from top lifting vessel thimbles and driven on thimble winch. Ends of cables to be replaced are removed from thimbles of bottom lifting vessel to withdraw said cables from trunk. Upper ends of cable with clamps on device 5 are placed thereon, driven via friction pulley 7 and secured in thimbles 17 of top lifting vessel. Special device is used to this end provided with metal plate with vertical guides, thrusts and cutout for driving cable to be suspended.

EFFECT: ease of replacement.

2 cl, 10 dwg

Description

The invention relates to the mining industry, and in particular to methods of replacing the head ropes of multi-rope hoisting installations and devices for changing and hanging ropes.

There is a method of hanging and changing ropes of hoisting machines [1], according to which the hanging ropes are lowered with the simultaneous dismantling of the replaced ropes, which is achieved by placing winches on the lower horizon for receiving ropes guided by special pulleys, and on the top using coils with ropes, a friction winch , devices for regulating the pulley's traction ability.

The disadvantages of this method are:

- the use of a large number of additional equipment;

- the difficulty in synchronizing the work of coils in the head, winches on the horizon, a friction winch and a friction pulley of a lifting machine;

- the difficulty of lowering the flat balancing ropes due to the design features of this type of ropes, determining the order of their multilayer winding and winding under load from the winches;

- the impact on the replaced rope of variable magnitudes of torques when replacing round-strand ropes, due to the difference in the load perception of the replaced and attached ropes;

- the hanging rope experiences additional loads when hinged, which leads to its preliminary drawing, while modern rope manufacturers supply, if necessary, pre-drawn cables, in which the preliminary drawing process is strictly maintained both in magnitude and in frequency of the pulling force exerted on the rope.

The closest in the set of essential features and the achieved positive effect to the claimed method is a method for individually replacing the head ropes of a multi-rope hoist [2], according to which the linkage and change of ropes is carried out by installing the lifting vessels in extreme positions, and then above the lower lifting vessel on the mounting bridge replaceable rope is fixed in the pile, the replaceable rope is cut from the lifting vessels, the lower end of the replaced rope is brought to a coil in the lower part of the trunk, etc. distill the lifting vessels over the entire length of the barrel. On the mounting bridge, the end of the hanging rope located on the coil in the head is fixed, the coil is installed on the upper lifting vessel, the upper end of the replaced rope is attached to it, and the lifting vessels are driven over the entire length of the barrel. In this case, the replaced rope is wound onto the lower coil, and the hanging rope is placed in place of the replaced rope, the coil from the lifting vessel is dismantled. Further, the upper and lower ends of the hanging rope are attached to the lifting vessels. The clamp is removed from the hanging rope in the pile, the mounting bridge is removed, the lifting installation is adjusted and adjusted.

A device for implementing this method is a mounting bridge, on which, with the help of the clamps, the ropes are replaced first and then hanged, consisting of two parallel channels connected to each other with a gap for placing the ropes.

The main disadvantages of this method and device are:

- the need for the haulage of lifting vessels for the entire length of the barrel without one replaceable rope, which creates abnormal operating conditions of the lifting installation;

- the lifting vessel when attaching the replaceable rope to it is affected by a significant additional overturning moment, which adversely affects its operational resource;

- significantly increases the specific pressure of the ropes on the lining of the friction pulley, which is unsafe for lifting installations;

- the difficulty (impossibility) of placing in the trunk even on adjacent hoists of the performers to control the reels mounted on the hoisting vessel with the hanging rope, since the hoisting installation on which the ropes are being replaced does not work during hauls not in the design mode;

- the impossibility of removing excess lateral loads on the lifting vessel by displacing the replaceable rope in a horizontal plane relative to its initial position along the mounting bridge after installing the clamp.

In connection with the general direction in the mining industry to increase mining depths and, as a result, to a more rational use of the capabilities of hoisting plants, there is a need to develop optimal methods for replacing ropes, which can significantly save time for work on their replacement.

The objective of the invention is to optimize the total duration of the stop of the trunk for replacing the ropes of a multi-rope hoist due to the dispersion of time during the descent of the hanging and unwinding of the replaced ropes, eliminating their mechanical damage, due to the use of a device that allows you to move the rope fixed in the clamp along the mounting bridge.

The technical result of the proposed method is achieved due to the fact that in the method, which includes fixing the replaceable and hanging ropes, placing the hanging rope on the lifting vessel, lowering the lifting vessel while unwinding the hanging rope, dismantling the ends of the replaced rope from thimbles, first all the hanging ropes are fixed in turn copra, then, in turn, unwind these ropes by using a coil mounted in a lifting vessel, and fix the second ends of these ropes in the lower part the trunk is outside the zone of movement of the lifting vessels, then the ropes to be replaced are fixed on the mounting bridge, the ends of the ropes to be replaced are disassembled and, in turn, these ropes are wound onto the winch, the lower ends of the ropes to be hung are fixed on the corresponding jacks, and the upper ends of the ropes to be replaced by a mounting bridge are moved carry them through the friction pulley and fix on the upper lifting vessel.

A device for implementing the method of replacing the head ropes of a multi-rope lifting installation includes a clamp for fixing the hanging rope, a mounting bridge of two parallel channels. According to the invention, a metal plate with a cutout for the rope, threaded holes and an oval hole, with welded steel vertical rails and horizontal stops is installed between the mounting bridge and the clamp.

The technical result of the claimed invention consists of eliminating the haul of the lifting installation with the missing number of ropes and the increased pressure of the ropes on the lining of the friction pulley, excessive lateral loads on the lifting vessel, lowering the coil with the hanging rope.

According to the claimed method of replacing the head ropes of a multi-rope lifting installation and a device for its implementation (see Fig. 1) above the lifting vessel 1 of the mine lifting installation with a friction pulley 2, a mounting bridge 3 is mounted in the copra, on which, outside the zone of movement of the lifting vessels, is a clamp 4 located on a special device 5, fix the upper end of the hanging rope 6, leaving a sufficient supply of the hanging rope in the bay outside the clamp 7. The coil with the hanging rope 8 is installed in the lifting vessel 1 and lowered and the lower horizon while unwinding rope put in the barrel (see FIG. 2), where the bottom of the barrel-hang reinforcing the second end of the rope to the mounting bridge 9 with the clamp 10 outside the zone of movement of lifting vessels. Similarly (see Fig. 3), all hinged ropes 11 of a multi-rope hoist are placed and strengthened in the trunk. The lifting vessels 1 and 12 are installed in extreme positions on the mounting bridges at the top 13 and at the bottom 14. On the (see Fig. 4) replaceable ropes 15, on the mounting bridge 3 install the clamps 16, dismantle (see Fig. 5) the ends of the replaced ropes from thimble 17, remove the replaceable ropes 18 from the friction pulley of the lifting installation, mount a block 19 through which one of the replaceable ropes is driven onto the winch 20, dismantle the lower end 21 of one of the replaceable ropes from the thimble 22, clamp 23 and exhaust the replaceable rope from the trunk. In a similar way (see Fig. 6), the remaining ropes of a multi-rope hoist are exhausted from the trunk.

From the lower end 24 of one of the hanging ropes located in the barrel, dismantle the clamp 10 and fix the end of the rope in the corresponding thimble 22. The upper (see Fig. 7) end 7 of the hanged rope together with the clamp 4 placed on a special device 5 is pushed by the end the rope 21, conducted through the deflecting blocks 19 and 25 along the mounting bridge to the place of the dismantled replaceable rope (see Fig. 8), is passed through the friction pulley and fixed in the thimble 17 of the upper lifting vessel. Similarly, the rest of the ropes placed in the trunk are pushed into the place of the replaced ones and fixed in the thimbles of the lifting vessels. Dismantle clamps, special devices, mounting bridges and adjust the tension of the mounted ropes.

The device for implementing the method comprises (see Fig. 9) a mounting bridge 26, a clamp 27 and a metal plate 28. The mounting bridge consists of two parallel steel channels 29, spaced apart from each other by a distance exceeding the diameter of the hanging rope 30 by 20 mm. The clamp consists of steel vertical 31 with a groove 32 and horizontal 33 plates welded together at right angles with stiffeners 34 of the same material and holes 35 for installing the coupling bolts 36 with nuts 37 in the vertical plate and holes 38 for fixing bolts 39 in the horizontal plate. A metal plate with a cutout 40 for an attached rope, holes 41 with a thread for fixing with clamp bolts 39 and an oval hole 42 for a cable 43 is installed on the mounting bridge (see Fig. 10). Steel vertical guides 44 and horizontal stops 45 are welded to the metal plate.

The use of the method of replacing the head ropes of a multi-rope hoist and a device for its implementation saves the time of work on replacing the ropes, reduces the risk of mechanical damage to the ropes, reduces the number of auxiliary winches and mechanisms, makes it possible to use the discrete organization of the replacement of ropes, which can significantly remove time from each other other basic operations of replacing the ropes, and in the resulting intervals to operate the mine lifting installation without restrictions, which sobenno important for lifting equipment, lifting carrying minerals that are prone to spontaneous combustion, sintering and so on.

Information sources

1. USSR author's certificate No. 707881, cl. B66B 19/02, 1980

2. Copyright certificate of the USSR No. 1504195, cl. B66B 19/02, 1986

Claims (2)

1. A method of replacing the head ropes of a multi-rope hoisting installation, including fixing the replaceable and hanging ropes, placing the hanging rope on the lifting vessel, lowering the lifting vessel while unwinding the hanging rope, dismantling the ends of the replaced rope from thimbles, characterized in that at first all the hanging ropes are fixed in turn in the pile, then these ropes are unwound in turn by using a coil installed in the lifting vessel, and the second ends of these ropes are fixed in the lower parts of the trunk outside the zone of movement of the lifting vessels, then the ropes to be replaced are fixed on the mounting bridge, the ends of the ropes to be replaced are dismantled and the ropes are wound on a winch, the lower ends of the ropes to be hung are fixed on the corresponding jacks, and the upper ends of the ropes to be replaced by a mounting bridge are moved , carry them through the friction pulley and fix on the upper lifting vessel. 2. A device for replacing the head ropes of a multi-rope lifting installation, including a clamp for fixing the hanging rope, a mounting bridge of two parallel channels, characterized in that a metal plate with a cutout for the hanging rope, holes with a thread for fixing the clamp, is oval between the mounting bridge and the clamp hole for another rope and welded steel vertical guides and horizontal stops.

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