CN2717910Y - Crane main girder capable of restoring upper camber - Google Patents

Abstract

The utility model relates to a crane main girder capable of restoring the upper camber which is composed of an I-shaped girder and a box-shaped strengthening girder and is characterized in that a cut slot is arranged in the middle of the box-shaped strengthening girder on the I-shaped girder, spacer blocks are pillowed between both ends of the main girder and a rail, and a binder string binds both ends of the main girder, the spacer block and the rail together. When the utility model downwarps and deforms, a hoisting jack is needed only to restore the upper camber of the crane main girder through an upright post so that the upper camber of the crane main girder meets the state-specified standard and ensures the safe operation of a crane.

Description

A kind of crane girder that can repair camber

Technical field

The utility model relates to a kind of crane girder that can repair camber.

Background technology

Hoisting crane is the special equipment that industry and traffic material enterprise widely uses, in order to guarantee the requirement of hoisting crane in-use performance, reduce electric calabash dolly " climbing ", " slide car " phenomenon as far as possible, crane girder must have certain camber, China's hoisting crane manufacturing technology condition has been stipulated crane girder when zero load, and the due camber of girder span centre is ${\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="Y20042007608800041.png"\; state="\{\{state\}\}">f</figure-callout>}}_0=\frac{\mathrm{LK}}{1000}\left(\stackrel{+0.3}{-0.1}\right),$ (L _kSpan for hoisting crane).Stipulate that simultaneously girder elasticity F winding degree is $F\&le;\frac{\mathrm{LK}}{700}$ (counting from original camber) is because the various reasons in designing, make, using all can make crane girder produce lower flexure strain, its harm shows as: cart is gnawed rail, electric calabash dolly " climbing ", " slide car ", hoisting capacity descends, even has an accident, and jeopardizes safety.

Summary of the invention

The purpose of this utility model just provides a kind of crane girder that can repair camber, when girder produces lower flexure strain, can repair.

The utility model is achieved like this, girder is made of H-girder and box-shaped reinforcement, cutting groove in the middle of the box-shaped reinforcement on H-girder, and girder two ends road wheel contacts with rail, pad is gone up cushion block between girder two ends and rail, and jag bundles girder two ends and cushion block, rail.

During the utility model lower flexure strain, use and do of the camber recovery of jin top, make the camber of crane girder meet national standard, guarantee that hoisting crane is safe in utilization crane girder.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

1. road wheels, 2. cushion block, 3. rail, 4. jag, 5. cutting groove, 6. box-shaped reinforcement, 7. H-girder in the drawings.

The specific embodiment

As shown in Figure 1, girder is made of H-girder (7) and box-shaped reinforcement (6), a cutting groove (5) in the middle of the box-shaped reinforcement on H-girder, girder two ends road wheels (1) contact with rail (3), pad is gone up cushion block (2) between girder two ends and rail, and jag (4) bundles girder two ends and cushion block, rail.When girder bending-down was out of shape, people were as long as come jack-up in the middle of the girder by column with jack, and the line of rabbet joint on the box-shaped reinforcement then can V-shapedly open, and only need sew on and be encased inside steel plate at V-shaped groove, solid welding then, polishing, paint, then the camber of girder can recover.

Claims (1)

1, a kind of crane girder that can repair camber, girder is made of H-girder and box-shaped reinforcement, it is characterized in that the middle cutting groove of box-shaped reinforcement on H-girder, pad is gone up cushion block between girder two ends and rail, and jag bundles girder two ends and cushion block, rail.

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