CN102992190A - Crane cantilever beam - Google Patents

Abstract

The invention discloses a crane cantilever beam. The crane cantilever beam comprises a long transverse plate, a short transverse plate and a crane cantilever beam which is composed of a vertical plate connecting the long transverse plate and the short transverse plate and having an I-shaped cross section, and the end faces of the two sides of the long transverse plate are symmetrically provided with two side plates; and the lower end face of each side plate is connected with the middle of the side face of the vertical plate through wobble plates. Through analog computation by a computer, the strain in the horizontal direction of the crane cantilever beam disclosed by the invention is smaller than that of a conventional beam with the I-shaped section. Compared with the prior art, the crane cantilever beam provided by the invention solves the problems that the wind resistance and inclined side-loading capacity of a boat of the traditional cantilever beam with the I-shaped section are poor.

Description

The jib boom beam

Technical field

The present invention relates to ship machinery manufacturing technology field, particularly a kind of jib boom beam with Yu Haiyang or boats and ships.

Background technology

Traditional beam type hoisting crane generally adopts I-beam section as the orbit of electric block, electric block moves along the I-beam section lower flange, under load allows, general direct with I-beam section as cantilever beam, can not only satisfy load request like this, and technique realizes that simply the weight of cantilever beam is also low weight.The steel cantilever beam that traditional cross-sectional plane is " worker " font, the riser that includes long transverse slat, hyphen plate and connect described long transverse slat and hyphen plate, the vertical center line of described riser overlaps with the vertical center line of described long transverse slat and hyphen plate.Yet, when as deck crane, the jib boom beam of this cross-sectional plane " worker " font as shown in Figure 2 is difficult to satisfy design requirement, its reason is: at first, the I-shaped steel section size of standard is large not, can't reach the desired design size of deck crane fully, secondly, also be the most fatal problem, the strong wind that I-beam section formula jib boom beam produces when being difficult to bear marine operation carries and ship itself tilts, and caused crane side is carried.

Summary of the invention

The object of the present invention is to provide and a kind ofly can bear larger wind and carry the jib boom beam that carries with side.

In order to address the above problem, the technical scheme of this jib boom beam is: this jib boom beam comprises by long transverse slat, hyphen plate and connects cross-sectional plane that the riser of described long transverse slat and hyphen plate consists of being the jib boom beam of " worker " font.End surface symmetric in the both sides of described long transverse slat is provided with two blocks of side plates; The lower surface of every block of described side plate is connected by the middle part of swash plate with the side of described riser.

The structure of this jib boom beam cross-sectional plane and the stress analysis of traditional H-section girder construction are finished by computer software, it is specific as follows: choose the cross-sectional plane I of this jib boom girder construction and the cross-sectional plane II of traditional H-section girder construction, the cross-sectional area of setting both equates, all is controlled at about 28500 square millimeters.To the cantilever beam modeling, and respectively it is carried out static analysis by ANSYS according to above-mentioned these two kinds of cross-sectional structures, draw respectively the stress of its hoisting crane and the strain value of all directions, for the ease of relatively, its loading is identical, and load condition is as follows:

The radial weight P=10000N of cantalever head,

The ship cantilever beam head side that causes of inclining is carried side=1000N into P

Wind carries PW=4000N

Below be two kinds of cross-sectional plane cantilever beams result of calculations separately:

From top ess-strain table, can draw: have strong wind to carry and impact that the ship canting is carried under, the horizontal direction strain of the cantilever of cross-sectional plane II reaches 26.24mm, and the horizontal direction strain of the cantilever of cross-sectional plane I only is 12mm, less than the former half.Clearly, the cantilever of cross-sectional plane I is better on the ability that carrying wind carries, the ship canting is carried.Through computer Simulation calculation, the horizontal direction strain of this jib boom beam is less than half of traditional H-section beam.

Because adopt technique scheme, the present invention compared with prior art has following beneficial effect:

Therefore horizontal direction strain of the present invention, has significantly improved anti-strong wind and the ship canting loading capability of jib boom beam less than half of traditional H-section beam.

Description of drawings

Fig. 1 is cross-sectional structure scheme drawing of the present invention.

Fig. 2 is the cross-sectional structure scheme drawing of traditional H-section beam.

The specific embodiment

[0009] the invention will be further described below in conjunction with accompanying drawing:

The transversal beam of this jib boom beam illustrated in figures 1 and 2, comprising by longtransverse slat 2,hyphen plate 3 and connecting the cross-sectional plane that the riser 1 of longtransverse slat 2 andhyphen plate 3 consists of is the jib boom beam of " worker " font.Lower surface in the both sides of longtransverse slat 2 is arranged with two blocks of side plates 4; The end face of every block of side plate 4 is connected with the middle part of the side of riser 1 byswash plate 5, and above-mentioned all plates link together by welding manner.

Claims (1)

1. jib boom beam, comprise by long transverse slat, hyphen plate and connect cross-sectional plane that the riser of described long transverse slat and hyphen plate consists of being the jib boom beam of " worker " font, it is characterized in that: the end surface symmetric in the both sides of described long transverse slat is provided with two blocks of side plates; The lower surface of every block of described side plate is connected by the middle part of swash plate with the side of described riser.

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