SU1257050A1 - Device for control of tackle block verticality - Google Patents

Description

one

The invention relates to a hoisting and transport machinery, in particular to safety devices for cranes, and can be used as a device for limiting the angle of inclination of a load-lifting polyspast from the vertical.

The purpose of the invention is to increase the accuracy of the control.

The drawing shows a device for controlling the verticality of the chain hoist, a general view

The device comprises a measuring table 2 mounted on a movable cage 1 of a chain hoist and an inclinometer 3 connected to it;

Measuring table 2 has a triangular shape and its base is set to a hinge on the axis 4 of the movable shroud of the polyspast. In the area of the other two tops of the measuring table 2, rollers 5 are mounted, which are spring-loaded so that they ensure reliable interaction of the measuring table 1 with the rope 6. The latter circumstance together with the hinged installation of the measuring table 1 on the axis 4 provides the angle between the surface of the measuring table 1 and the rope 6 equal to 90, regardless of the position of the hook.

The device works as follows.

At the initial moment of time, the tackle is in vertical position, rope 6 also occupies a vertical position. Due to that.

Editor T. Parfenova

Compiled by S. Nefedov Tehred M. Hodankch

Order 4877/18

Circulation 799 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Production and printing company, Uzhgorod, Projecto st., 4

"ABOUT

2570501

that the measuring table 2 has the shape of an isosceles triangle, and the axis 4 is equally distant from the branches of the rope 6, the surface of the table 2 takes the horizontal position, and, as a result, the inclinometer 3 forms the zero level of the output signal. When lifting a load (e.g., a long product), the chain hoist may deviate from the vertical position. In this case, the surface of the measuring table 2, due to the described design features of the device, always retains its position perpendicular to the rope of the chain hoist,

As a result, the angle of inclination of the surface of the measuring table relative to the horizontal plane is always equal to the angle of deflection. Lispast from the vertical and does not depend on the possible rotation of the hook when performing slinging operations. The inclinometer 3 converts the angle of inclination of the surface of the measuring table 1 into a proportional electrical signal, which is detected by the secondary equipment (not shown). Communication between tiltmeter 3, which is a sensor

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com, and the secondary (receiving) register equipment is carried out either electrically using a cable or using wireless frequency telemetry. As a tiltmeter, any two-dimensional slope sensor can be used.

Proofreader E.Roshko

Claims (1)

DEVICE FOR VERTICALITY CONTROL OF POLYSPASST, containing a measuring table mounted on a movable chain hoist and a tilt meter attached to it, characterized in that, in order to increase the accuracy of control, it is equipped with rollers mounted on the measuring table with the possibility of interaction with the pulley contacts, and the measuring table is installed pivotally on the axis of the movable shaft o ₍ pulley blocks.