SU757674A1 - Mast - Google Patents

Description

The invention relates to the field of construction and can be used in the construction of masts, towers, pillars, portals, etc. designs.

A lattice mast with a rectangular cross section is known, in the corners of which there are ⁵ longitudinal zones, and between the latter there are lattice rods [1].

In this solution, due to the absence of spacers, all elements work as squeezed elements, which increases the metal intensity of the structures. ,

The closest technical solution is the mast, which includes delays, a multi-faceted sectional trunk with longitudinal ₍₅ belts, braces and cross-section along the contour [2].

A disadvantage of the known mast is the location of cross-braces on each side of the mast, which increases its intensity and complexity of manufacturing, and when using flexible diagonals requiring prestressing, there is a large number of tensioning devices.

2

The purpose of the invention is to reduce material consumption and simplify manufacturing by reducing the total length of the diagonals and the number of nodes connecting diagon to the belts.

This goal is achieved by the fact that in the mast, which includes delays, multifaceted sectional trunk with longitudinal belts, braces and struts located along the contour of the cross section, braces are located in planes passing through the bisectors of the corners of the multifaceted contour of the cross section, and are interconnected, forming pyramids with bases parallel to the planes of the struts, and common vertices located in the plan in the center of gravity of the cross section of the mast trunk.

In order to enable prestressing of the structure during the manufacturing process, the diagonals can be made flexible and within each section are provided with a tensioning device with rollers located in the diagonal planes.

In addition, in order to increase stiffness

the joints of the sections and reduce weight and eliminate the additional effort in the belts from 757674. four

Credential tensioning of flexible braces, last c. each section is attached to the belts of adjacent sections.

When using the structure in collapsible masts transported in order to speed up the assembly process and reduce the transport dimensions, the spacers can be made in the form of rigid diaphragms with corner holes in which belts are installed.

FIG. 1 schematically shows a general view of the mast; in fig. 2 - a fragment of the trunk; in fig. 3 - cross section of the trunk; in fig. 4 - tensioning device; in fig. 5 shows section A-A in FIG. four; in fig. 6 - section collapsible ^ collapsible transported mast; in fig. 7 is a section BB in FIG. 6

The mast includes braces 1 and a multifaceted sectional trunk 2 with longitudinal belts 3, rigid struts 4 located along the contour of the section, and braces 5, which can be both rigid and flexible. The braces 5 are located in the planes passing through the bisectors of the corners of the multi-faceted contour of the section, and are interconnected, forming pyramids with bases parallel to the planes of the struts 4 and common vertices located in the plan in the center of gravity of the cross section of the mast. To ensure the geometrical immutability of the system, additional braces are installed in separate panels.

. In the case of flexible braces, a tension device 6 is used, containing, for example, a screw 7 with left and right threads, two nuts 8, around the perimeter of each of which, in the planes passing through the bisectors of the corners of the multifaceted contour of the cross section of the mast trunk, rollers 9 are installed on the axes - ten.

In the collapsible masts being transported, the struts form a rigid diaphragm 11, in the corners of which holes 12 are formed. These openings include the landing rollers 13 of the belts 3, which are interconnected by flexible struts 5 with a single tensioning device. In this case, each flexible spacing 5 is fixed at one end to the yoyasu 3 of one of the adjacent sections permanently, and at the other end has a connector B 'in the form of a hook or koush, which is attached to the eye of the belt. Another adjacent section. When rotating the screw 7, the nuts 8 together with the rollers 9 diverge and carry out the simultaneous tension of all braces of this section of the mast trunk. When assembling sec) ": th collapsible transportable masts, the landing rollers 13 belts 3 are inserted into the holes 12 of the diaphragms 11 and the flexible diagonals 5 are tensioned, which press the associated belts 3 to the diaphragms.

Since each intersection unit (see Figures 6 and 7) fit two intersecting flexible braces, the vertical components of the pretension in the bracings with ₅ press belt 3 to the diaphragms 11 and at the same time, closing within the joint, are not transmitted to belt. To disassemble the section, it is enough to loosen the tension of the flexible bracings 5, detach the braces from the belts and detach

Yu belt from the diaphragm.

Transportation of the collapsible mast

carried out in the form of transport units of two types. The first type of blocks is a diaphragm stacked on top of each other.

15 The second type combines tubular belts and

attached to them flexible braces with tensioning devices.

The design in comparison with the known allows to reduce the weight and cost of the trunk

20 masts by reducing the total length of braces by 1.5 times and reducing the number of tensioning devices, reduce installation time due to the simultaneous tensioning of a group of flexible bracings and reduce the transport dimensions of the collapsible masts being transported.

Claims (4)

Claim 30 1. A mast that includes braces, a multifaceted sectional trunk with longitudinal belts, braces and cross-sectional contours located along the contour, characterized in that, in order to reduce material consumption 35 and simplified production, braces are located in planes passing through the Biss ·. the tris of the corners of the polyhedral contour of the section and are interconnected, forming pyramids with bases parallel to the planes 40 struts, and common tops, located in the plan in the center of gravity of the cross section of the mast trunk. 2. Mast and. 1, characterized in that, in order to reduce installation time, 45 braces are made flexible, within each section they are equipped with a tensioning device with rollers located in planes of diagonals. ₅₀ 3. Mast on π. I, different, by the fact that, in order to increase the stiffness of the joints of the sections and eliminate additional efforts in the belts from the preloading of the braces, the last in each section is attached ₅ _ lena to the belts of adjacent sections. 4. Mast on ίί. 1, different the fact that, in order to ensure the collapsible and reduce transport dimensions, the spacers are made in the form of rigid diaphragms five 757674 with corner holes in which belts are installed.