SU837994A1 - Span structure of power-operated bridge - Google Patents

Description

(54) FLIGHT AIR The invention relates to a bridge-mounting technique and can be used in mechanized bridges. The span of a mechanized bridge is known, including a combined assembly of blocks connected by means of unifying hinges, a rigidity bridge and a span structure disclosing a span structure of a span structure l . The disadvantage of this span structure lies in the relatively small bearing capacity, defined as for a simple girder bridge. The closest to the proposed technical solution is the span structure of a mechanized bridge, including a team of interconnected medium and two blocks, stiffness beam, strut, tightening, interacting with racks and hinged at the ends of the extreme blocks of the blanket bone gesture, and a mechanism for unfolding the span, moreover, the puff is made flexible, the beam blocks are The bracings are connected by means of unifying hinges and are equipped with adjustable along the length additional oblique struts, the upper ends of each MOS are ANIZED. The disadvantage of such a span is the complexity of the design, the relatively low bearing capacity and the reliability of the span, due to the presence of additional being adjusted along the length of struts, execution of puffs in the form of flexible elements having a significant deformatsiipri load passing over the bridge, as well as the difficulty of providing precise tension tightening and folding Spans using hydraulic drive. The purpose of the invention is to simplify the design, increase the bearing capacity and reliability of the superstructure. This goal is achieved by the fact that in the superstructure of a mechanized bridge, including a team of interconnected middle and two extreme blocks, a stiffness beam, a stand, a hook, interacting with the posts and hinged at the ends of the extreme blocks of the beam, and the mechanism of opening the project structure, the middle The block of rigidity bali is equipped with a pin fixed in its middle part and made with recesses on the ends, the extreme blocks are made with protrusions on the tori that enter the recesses on the corresponding facing The ends of the middle block are tightened with a rivet of three sections hinged along the length, the middle section of the tightening is made with guides rigidly fastened on it, interacting with the pin, and the extreme and middle sections of the fastening are fitted with end stops fixed in their upper part , and the racks are made in the form of two pairs of rods, with the bottom of the rod in each of the pairs pivotally fixed at one end to the middle section of the puff, and the other to the corresponding extreme block of the stiffening beam, and the other rod pivotally fixed with the bottom end on the middle block of the stiffness beam, and the other end on the corresponding extreme section of the tie.

FIG. 1 is schematically depicted; the superstructure in transport position f in FIG. 2 - the same, in the operating position; in fig. 3 - unit for fastening the rods to the stiffening beam blocks and the pulling section.

The span structure of the mechanized bridge contains a national team of interconnected middle 1 and two extreme 2 blocks stiffness beam, struyki, made in the form of two pairs of rods 3 and 4, rigid tightening, made of three connected in length by means of unification hinges 5, sections 6 and 7 , with the middle section 6 of the fixture being made with the guides 8 rigidly fixed on it, and the extreme 7 and middle 6 of the fixing section are provided with end stops 9 fixed in their upper part, which are in contact with each other with a fully open position SRI Spans. The span structure is also provided with a mechanism for opening it (not shown).

The middle block 1 of the stiffener beam is provided with a pin 10 fixed in the middle of its cleaning, which interacts with the guide rails 8 and is made with recesses 11 along the ends, and the extreme blocks 2 are made with the projections 12 along the ends facing into the recesses 11 on the corresponding faces facing them the ends of the middle block 1.

The extreme sections 7 of the tight fastening and the extreme blocks 2 of the stiffness beams are connected by means of hinges 13. One rod 4 of each of the pairs of rods 3 and 4 is pivotally fixed with one end to the middle section

6 straps, and the other on the corresponding extreme block 2 stiffness beams, and the other rod 3 is hinged at one end on the middle block of the 1st stiffness beam, and the other g on the corresponding extreme section

7th jack. ,

The guides 8 limit the possible horizontal displacement of the middle block 1 of the stiffening beam when folding and opening the span by moving them along: pin 10. Connecting the blocks 1 and 2 of the stiffening beam by means of those that are on their ends

recesses 11 and the protrusions 12 entering into them eliminates the need to introduce additional articulations, ensures the reliability of the junction of the blocks during operation

and ease of folding them during transport.

The implementation of the span in the form of a beam connected to a rigid tie also makes it possible to significantly increase the carrying capacity

bridge versus limestone and technical solutions.

Claims (2)

1.UK patent number cl. E 1 G, 1969. 2.Certificate of Certificate No. 2541863 / 29-33, Cl, E 01 D 15/12, 1977. eleven G5