SU142739A1 - Spring-pin dynamometer to the gantry crane - Google Patents

Description

Spring-contact dynamometers to gantry cranes are known, which limit the excess load capacity, consist of a spring-loaded support, mounted a taller of a mobile carriage, and a balancing unit using a si-nal. lamp panels.

Distinguish.annoy. The peculiarity of the described spring-contact dynamometer is that its equalization unit is equipped with a rod, which is spring-loaded directly on the casing of the drum of the hoist, and with the help of a washer attached to the spring, provided with a contact, are transmitted by means of a sensor to the crane operator’s cabin and the index board visible in day and night time. A dynamometer of this design provides case control of the load being lifted.

FIG. 1 shows the described spring-kongatny dynamometer mounted on the casing of the drum hoist; in fig. 2 –dynamometer circuit in non-operating state; in fig. 3 - the same, in working condition.

In the spring of the prulsin dipole meter, it rests on the foot 2, which is welded to the waist cover 3, which moves on the beam of the gantry crane. Through the hole in shelf 2 and the spring 1, the gab 4 is passed, at one end of which a balancing block 5 is fastened. The other end of the rod is pressed with a nut 6 on the washer 7 exchanged on the spring. On shelf 2, a panel 8 is installed on which to mount the sensors .9 and the limit switch W.

Depending on the load lifted by the crane and, consequently, the degree of compression of the spring, the clamp 7 interacts with this or that sensor with its contact L. As a result, the signal lights 12, which are installed in the crane operator's cabin, as well as on the switchboard, which leads to the barrier near the crane cabin, light up. Sign board

No. 142739-2

duplicates the indications of the signal-lamps in the cab of the crane operator and is intended for the buyer to lift the load with a weigher or a rafter.

Spring / tared control weights. In accordance with the amount of compression of the spring, depending on the weight of the load, the sensors 9 on the panel 8 are installed at a certain height. Thus, for example, when the contact P interacts with the first sensor, the corresponding bulb lights up, which indicates a certain weight on the hoist hook. When the contact 11 interacts with the second sensor, two lamps light up, which indicates a greater weight determined according to the preliminary spring calibration, etc. When the contact // is pressed, the last sensor burns all the lamps, and when the crane is overloaded, the rod of the last sensor abuts to the limit switch 10, by means of which the electric control circuit of the hoist is broken, and the operation of the crane is stopped, and red lamps are lit in the crane operator's cabin and on the indicator board.

The described spring-contact dynamometer is designed for gantry cranes operating at sites during the processing of various cargoes, including containers.

By operating the crane at container sites, an empty or loaded container can be detected. In addition, when using a spring-contact dynamometer of this design, crane overload is excluded, which often leads to the breakdown of its mechanisms. Thanks to the installation of light bulbs in the crane operator's cabin, as well as light bulbs on the switchboard, visible in daylight and installed at the crane cabin, it is possible to control the load being lifted both from the side of the crane operator and from the personnel serving the cargo area of the crane.

The research and design institute of test machines, instruments and mass measuring devices in its conclusion notes that the proposed spring-contact dynamometer is efficient and can be used in cases when the fungus of determining the weight of the lifted load by 5-10% is permissible.

And redemt and z obreteni

Spring-loaded dynamometer to the gantry crane limiting the excess load capacity, consisting of a spring-loaded support mounted on the waist of the stationary trolley and equalizing unit using signal lamp panels, characterized in that, in order to reduce the dynamic forces and control over the lifted load its equalizing unit is equipped with a rod which is spring-loaded directly on the casing of the drum of the hoist, and with the help of a spring attached to the spring provided with a contact is transmitted The sensor weighs into the crane operator’s cabin and on the signage board, visible during the day and at night.

6 4 L

Phi.

To control circuit

Rig 2

To usnu hoist control

fus 3

//