RU70911U1 - PERFORATED TWO-BRANCH STAND WITH CORRUGATED INSERTS - Google Patents

Abstract

The utility model relates to building metal structures - perforated racks, used to maintain floors and coatings of buildings and capable of performing other functions. A perforated two-branch rack with corrugated inserts contains branches made of perforated I-beams with corrugated inserts, and two perforated steel plates combined into one section of a closed profile by welding, rivets or bolts.

Description

The utility model relates to building metal structures, more precisely, to perforated racks used to maintain floors and coatings of buildings and capable of performing other functions (lighting poles, communication systems, etc.).

Known metal structures for perforated rods made of:

- split rolling profiles (I-beams, channels) by dissolving along the wall of the initial profile in a zigzag line with subsequent butt welding of protrusions of the formed parts through rectangular corrugated inserts [Kopytov MM, Yashin SG Perforated beam with corrugated inserts / Certificate. on climbed. Model No. 16167 IPC ⁷ Е04С 3/08 No.200011860 / 20; Claim 05/11/2000; 12/10/2000. Bull. No. 34]. At the same time, a regularly perforated structure is obtained from a continuous rolling profile. The device of rectangular inserts with bent edges increases the rigidity of the wall of the perforated beam, since the bent edges protruding beyond the wall of the I-beam play the role of stiffeners. The disadvantage of this design is the significant difference between the radii of inertia relative to the main axes of the section;

- rolling profiles (I-beams, channels, angles), interconnected by perforated plates [Kopytov MM Perforated rods and methods for their study. Tomsk - 2002 (p. 4, fig. 1.1.a); Kopytov M.M. Perforated rods. Tomsk -1980 (p.79, fig.4.16)]. As a result, a two-branch column is formed, the branches of which are connected by perforated plates. The disadvantage of this design is the relatively small degree of cross-sectional development limited by the wall height of the initial profile. This limits the bearing capacity and rigidity of the rack.

The holes in the profiles and plates can be in the form of a square, rectangle, hexagon, octagon, circle, oval.

Closest to the claimed perforated rack is a rack formed of two continuous rolling profiles (I-beams, channels), interconnected by perforated plates by welding, rivets or bolts with the formation of a two-branch column [Kopytov M.M. Perforated rods. Tomsk - 1980 (p. 79, fig. 4.16)]. To increase the bearing capacity of the rack, it is necessary to increase the number of solid profiles. This leads to an increase in metal consumption.

The objective of the utility model is to increase the bearing capacity, stiffness of the rack with small metal and labor costs.

The problem is solved as follows. Two perforated I-beams with corrugated inserts formed by dissolving along the wall of the initial profile in a zigzag line, followed by butt welding of protrusions of the formed parts through rectangular corrugated inserts, are connected into one section of a closed profile using two perforated plates. The inserts are made with bent edges oriented in the longitudinal or transverse directions, protruding beyond the wall of the I-beam. Thus, the claimed design differs from the prototype in the use of perforated profiles with corrugated inserts instead of solid ones. This indicates the "novelty" of the claimed device. Due to the proposed replacement of solid profiles with perforated profiles with corrugated inserts, the stiffness and bearing capacity of the rack are increased, since perforated I-beams with inserts have a higher height compared to the original ones, with a slight additional material consumption, and also increases the local stability of the branch walls, because bent edges, protruding from the plane of the wall of the I-beam, play the role of stiffeners.

In figure 1. depicts a General view of a fragment of a perforated two-branch rack with corrugated inserts of a z-shaped profile with lateral orientation of the edges bent to different sides; figure 2. - view aa of figure 1; figure 3 is a section 1-1 of figure 1; figure 4 - corrugated insert z-profile, with bent in different directions edges. In Fig.5. depicts a General view of a fragment of a perforated two-branch rack with corrugated inserts [-shaped profile with a longitudinal orientation of the edges bent to one side; in Fig.6. - view aa of figure 5; Fig.7 is a section 1-1 of Fig.5; on Fig - corrugated insert [-shaped profile, with the edges bent to one side.

Perforated two-branch rack contains two perforated I-beams with corrugated inserts, consisting of belts 1, 2 and corrugated inserts 4 and 5, and two perforated plates 3 (Figs. 1, 2, 3, 5, 6, 7). Elements 3 (figures 1, 2, 3, 5, 6, 7) are attached to the external (external) sides of the shelves of perforated I-beams by welding, rivets or bolts. Corrugated inserts 4 and 5 are formed from a steel strip by bending the edges forming a [-shaped or z-shaped section profile (Figs. 4, 8). The inserts 4 and 5 are installed between the protrusions of the belts 1 and 2 and are welded to them by butt or fillet welds. It is possible to perform such a rack using welded composite I-beams, rolled I-beams with increased width of shelves of grades B and Sh, channels, bent sheets as initial profiles.

The manufacture of a perforated two-branch rack with corrugated inserts is as follows. Known methods (gas, plasma or laser cutting) dissolve the walls of the original I-beams (or other rolling profiles) along a zigzag line. Elements of belts 1 and 2 are formed. At the same time, the required number of rectangular inserts of specified sizes are produced by guillotine cutting (or in another way). The parallel edges of the rectangular inserts are bent by stamping, flexible on presses or otherwise

with the formation of a z-shaped (figure 4) or [-shaped (Fig. 8) corrugated profile of the inserts. The elements of the belts 1 and 2 are welded together on the protruding parts through rectangular corrugated butt joints with transverse (figure 1) or longitudinal (figure 5) orientation of the bent edges. The holes in the perforated plates are formed by stamping, or by gas, plasma or laser cutting. Perforated plates are attached to the outer (external) faces of the shelves of perforated I-beams by welding, rivets or bolts.

As a result of replacing continuous rolling profiles in a two-branch rack with perforated profiles with corrugated inserts, the section height increases quite significantly, and consequently, the rigidity and load-bearing capacity of the rack increases with a small additional material consumption and labor costs. The layout of an equidistant rack becomes possible. The bent edges of the corrugated inserts form local stiffeners. The local stability of the walls of the legs of the rack increases due to a decrease in the flexibility of the walls.

Claims (1)

A perforated two-branch rack with corrugated inserts containing branches and two perforated steel plates combined into one section of a closed profile by welding, rivets or bolts, characterized in that the branches of the rack are made of perforated I-beams with corrugated inserts obtained by cutting along a zigzag line along walls of continuous I-beams and subsequent welding of the formed parts along the protrusions through corrugated rectangular inserts, the bent edges of which are oriented in single or transverse directions and protrude beyond the wall.