SU906906A1 - Bridge crane skew limiter - Google Patents

Description

(54g) BRIDGE CRANE CUTTER LIMITER

one

The invention relates to a hoisting-and-transport machine building, namely, crane skew limiters and can be used for large-sized bridge-type auto-operators of galvanic lines. The bridge crane skew limiter is known, containing wheel position sensors relative to the rail, located along the diagonal, the outputs of which are connected in parallel with each other. a friend and included 8 control circuitry of the respective actuator. movement of the crane 1.

However, in the known device, the sensors monitor the skew of the wheels relative to the rail only with the same end beam, while the skewness of the wheels of the other end beam can be greater than the monitored skew. In addition, when the crane shifts 8 to one side without tilting, the sensors are triggered at the same time and the control circuit of the engines of the mechanisms of movement is in an indefinite state. All this reduces the efficacy of control and reliability of the limiter.

The purpose of the invention is to increase the accuracy of control and reliability of the limiter and the expansion of functionality.

The goal is achieved by the fact that the sensors are installed on the end beams of the crane and each of them is designed as a group of contactless traveling limit switches,. stepped apart in the horizontal plane along the rail, with the sensitive part being installed perpendicular to the longitudinal axis of the rail.

In addition, the skew limiter is provided with a side sensor mounted on the middle of each end beam with the ability to interact with the side

15 edge rail.

FIG. 1 shows a skew limiter, a general view; in fig. 2 shows section A-A in FIG. one.

The skew of the overhead crane 20 contains a sensor 1 polok: wheels 2 with respect to the rails 3. Sensors 1, located diagonally, are mounted on two end beams 4 and each of them is made in the form of stepwise spaced horizons; 3 contactless groups along the rail traveling limit switches 5, the flat sensitive part 6 of which is installed perpendicularly longitudinally and the axis 7 of the rail 3.

The outputs of the switches 5 identical stu ,, foam pilots 1 are connected in parallel pairs.) With each other and included in the scheme

engine control 8 corresponding

mechanism of movement of the crane.

On the middle part of each end beam 4, on the outer side of the crane track, lateral proximity sensors 9, lateral mixing indicators of the crane are installed, with the possibility of their interaction with the lateral edge 10 of the rail 3.

Limit skew bridge crane works as follows.

When the crane is skewed, the side edge 10 of the metal rail head 3 acts on the flat sensitive part 6 of the non-contact limit switch 5, causing a change in the signal at its output, which enters the engine control circuit 8 and reduces the speed of movement of the crane by one step.

The change in the speed of the respective movement mechanisms is made proportional to the skew of the crane and depends on the number of switches 5 of sensor 1.

When the valve is moved to one side without tilting, at the moment of simultaneous contact of adjacent running wheels 2 end beams 4 with the rail, the side edge 10 of the rail head 3 acts on the flat sensitive part b of the contactless limit switch 9, causing a change in the output signal, which entering the engine control circuit 8 reduces the speed of the movement mechanism located on the same end beam, causing a forced tilt of the crane, which begins to move to the center of the track. At the same time, sensors 1 re-activated

align the crane, after which it will move symmetrically relative to the track.

The use of the proposed skew limiter, as well as the presence of those set in the middle, gives a positive result when using; This has the effect of reducing the wear of the crane runways and the chassis of the bridge crane, which has separate drives for the movement mechanism, due to a more precise position of the wheels relative to the rails, achieved by a high degree of control accuracy and reliability of the contactless skew limiter.

Claims (2)

1. A bridge crane skew limiter containing wheel position sensors relative to the rail, located diagonally, the outputs of which are connected in parallel with each other and are included in the control circuit of the corresponding drive of the crane movement mechanism, characterized in that, in order to improve the accuracy of control and reliability sensors mounted on the end beams of the crane and each of them is designed as a group of contactless traveling limit switches, which are stepped apart in a horizontal plane along the rail, with the sensitive part of them being installed perpendicular to the longitudinal axis of the rail. 2. A limiter in accordance with claim I, characterized in that, in order to expand its functionality, it is provided with a side sensor mounted on the middle part of each end beam with the ability to interact with the side rail edge. Sources of information taken into account in the examination 1. USSR author's certificate No. 611857, cl. 66 C 9/16, 1976 (prototype). IIIII ///////////// 2