RU1791362C - Equalizing hydraulic buffer for safe wire rope lifting systems - Google Patents

Abstract

Usage: in hoisting-and-transport equipment, namely in devices that exclude the fall of the load when the cable breaks in cable systems. SUMMARY OF THE INVENTION: The hydrobuffer comprises a cylinder hermetically sealed with lids, through which a piston rod with a piston is passed, the rod is filled with a neck, and the piston is detachable from two halves enclosing the neck and has annular protrusions at the ends. In the gaps between the halves of the piston and the protrusions there are gaskets - chokes with a variable cross section in the protrusions. The height of the gaskets in the piston is less than the height of the halves of the piston. 3 ill.

Description

The invention relates to hoisting and conveying equipment, and in particular to devices that prevent the load from falling when the cable breaks in cable hoisting systems.

The aim of the invention is to increase the manufacturability and assembly of the device.

In FIG. 1 shows a diagram of a safe dual tackle with the proposed leveling hydrobuffer; in FIG. 2 - sectional equalizing hydrobuffer; in FIG. 3 is a section AA in FIG. 2.

The equalizing hydrobuffer consists of a cylinder 1 closed by covers 2. A rod 3 is passed through cylinder 1, in the central part with a neck, which is covered by a detachable piston A, which divides the internal space of the cylinder into two cavities filled with liquid. The piston A consists of two halves 5 and 6 and has annular protrusions 7 on both sides, in response to which there are cylindrical cavities 8 in the covers 2. In the gaps between the piston halves 5 and 6 and the annular protrusions 7. there are gaskets - chokes 9, which are in the protrusions 7 have a variable cross-section, thus forming in the protrusions the throttle grooves 10 of variable cross-section. In the piston itself, the height of the gaskets - throttles 9 - is less than the corresponding height of the halves of the piston, due to which the throttle grooves 11 are obtained in the piston 11. From the torch piston and from the inner surface of the gasket protrusions, the throttles are bent and are in contact with these surfaces. The ropes 12 and 13 are connected at one end to the stem 3 of the equalizing hydrobuffer, and to the other, around the bend, the blocks of the movable holder 14 are fixed to the winch drum 15. In this case, the rope 12 also bends around the deflecting unit 16.

The operation of the proposed device is as follows.

During normal operation of the safe double tackle, when both ropes 12 and 13 are intact, their lengths are equalized by moving the rod 3 with the piston A. At the same time, the liquid flows through the throttle grooves 11 from one cavity of the cylinder to the other with minimal resistance, as when the lengths of the ropes are aligned, the speed of movement of the piston approaches zero. When one of the ropes breaks, the rod 3 with the piston 4 moves towards the whole rope. In this case, the rod with the piston, and therefore the load suspended on the whole rope, moves with the speed specified by the parameters of the throttle grooves 10. The smoothness of the stop of the rod with the piston, and therefore the smoothness of the load on the second (whole) rope, is achieved due to the fact that with the protrusion of 7 in the cavity 8

of the lid 2, the liquid flows through the throttle grooves 9, the throughput section of which, as the protrusion 7 enters the cavity 8, decreases to zero.

The effectiveness of the proposed technical solution consists in increasing the manufacturability of the manufacture and assembly of leveling hydrobuffers used in safe rope hoisting systems, thanks to

securing the piston on the rod without using separate powerful fasteners, but only using the rod itself and the cylinder of the hydraulic buffer, as well as obtaining the necessary work

equalizing hybrid buffer of the throttle grooves in the piston and protrusions by using sealing elements of the piston halves and protrusions made in the form of gaskets - chokes. The proposed device can be used in safe rope hoisting systems, including two separate ropes, for example, in safe double tackle hoists, in safe double tackles of bridge, gantry and other cranes, in safe lifting systems of hoists and self-lifting cradles.

Claims (1)

Formula invented and Equalizing hydrobuffer for safe rope hoisting systems, comprising a cylinder with a rod hermetically sealed with covers, a piston mounted in the central part of the rod, annular protrusions made on its ends, and cylindrical cavities corresponding to them, and throttle grooves on the outer surface of the piston constant cross-section, and on the outer surface of the annular protrusions - throttle grooves of variable cross-section, characterized in that, in order to improve the manufacturability of manufacturing processes and assemblies, the piston is detachable in the longitudinal plane of the cylinder and mounted on the neck, made on the rod, the hydrobuffer is equipped with at least two gaskets located between the halves of the piston, and the throttle grooves of a constant cross section are formed by gaskets whose height is less than the diameter of the piston, and the throttle grooves variable section formed by the upper parts of the gaskets alternating sections, while the ends of the gaskets are bent outward from the inside of the protrusions and at the ends of the piston for contacting the surfaces of the piston and protrusions.