SU832028A1 - Hoist for assembling derricks - Google Patents

Description

one

The invention relates to a drilling technique, in particular, to equipment for assembling tower drilling rigs.

Famous lift for assembling yyshek, containing a sled with a rail wheel, a turntable with an arrow and turning around the horizontal axis of the site for installing tractor Tl

However, this device has a low reliability and a complex structure.

Also known is an elevator for assembling towers, containing an allen, racks with traction, a traverse with guide blocks pivotally mounted on it, and expansion rods ramming on the traverse and pivotally connected to the base of the winch Dl.

However, this lift has low reliability, because for lifting the safety of the liver, the lifts: 1 {palispastov when lowering and raising the assembled tower or its parts usually increase the margin of safety of the rope, increasing which causes an extra material consumption for the construction of the rope, increase & weight of the hoist and does not always prevent the possibility of breaking one of the ropes of the tackles

The purpose of the invention is to increase the reliability of the device by making it possible to prevent breakage of the ropes of the chain hoists.

The goal is achieved by the fact that each guide block is made in the form of discs with grooves in which detachable sliders are movably placed, the latter being associated with discs

damping elements installed in the glasses.

FIG. 1 shows the elevator for the assembly of the twigs, general view; in fig. 2, node I in FIG. one.

A hoist for the assembly of towers consists of a frame 1 containing shoes 2, pillars 3; lifting polyspasts 4 with channels 5, with shoes 2 are rigidly connected to traverse 6, on which guide blocks 7 are hingedly mounted. Traverse 6 is connected to expansion rods 8. Spacing rods 8 are hingedly attached to winch 10 9. Ropes 5 of lifting polyspast 4 pass through guide blocks 7 and, secured to the winch 10.;

Direction blocks 7 install; with on the axis x 11 on ball bearings 12,

On the axis 11 mounted detachable sliders 13, movably mounted in. grooves 14 discs 15.

The slides 13 are connected to the disks 15 by means of damping elements (springs) 16 inserted into the cups 17,

The work of the lift is as follows.

When assembling the tower using the proposed lift, the thrust force generated by the winch 10 is perceived by the spacer rods 8 through blocks 7 (damping elements 16, discs 15) and then transmitted to the traverse b.

The dynamic loads that occur in the hoisting ropes 5 are extinguished (reduced) by compressing the damping elements (springs) 16 and absorbing the excess acceleration energy during transients, as a result of which much less load is transmitted to the elements of the lift structure and the tower.

Thus, the proposed lift ensures safety and lowers the towers or parts thereof, and also significantly reduces the dynamic loads in the hoisting ropes.

Claims (2)

1. USSR author's certificate 93142, cl. E 21 B 15/00, 1951. 2. Authors certificate of the USSR. No. 602667, -kl. E 21 B 15/00, 1977. 3 W Jl l / j / 7/5 l // i