RU157024U1 - DUAL PURPOSE SUPPORT - Google Patents

Abstract

1. A dual-purpose support, comprising sequentially interconnected base, sections in the form of cylindrical metal pipes and a rack for mounting antenna devices located above the upper section and connected to it by a flange connection using hook bolts inserted into holes made in the walls of the end of the upper section, characterized in that in the flange connection of the rack with the upper support section, the flange welded to the rack is made with arcuate slots along hook bolts, and the hook bolts, inserted in holes in the wall of the end portion of the upper section, passed through arcuate slots in the strut flange and fixed gaykami.2. A support according to claim 1, characterized in that the rack flange is made with a conical protrusion, and the upper rack is equipped with a disc welded to it and made with a mating conical recess under the conical protrusion of the rack flange and holes for hook bolts. 3. Support according to claim 1, characterized in that the lower section has the largest diameter equal to the diameter of the base, and each subsequent section is made of a smaller diameter relative to the lower section, while the diameter of the rack is less than the diameter of the upper section.

Description

The utility model relates to the field of construction equipment and, in particular, to dual-purpose supporting structures, which are intended for the installation of urban electric transport structures, street lighting fixtures, CIP TORSADA systems and equipment of base stations of communication systems, i.e. as a radio mast of cellular communication, as well as for mounting other devices for various purposes.

Various designs are known RU 771311 A1, 1980; RU 2070267 C1, 1996; RU 28507 U1, 2003; US 3,187,175, 1965; US 4,216,632, 1980; US 7,497,140 B2, 2009; US 7,557,771 B1, 2009; DE 197.03.856 A1, 1998

Known high-mast lighting installation containing a support made in the form of a hollow truncated cone, a crown frame with a light source mounted on brackets, a system for lowering and lifting the crown frame, which includes a drum with a cable, a gearbox, a locking device and an asterisk, while the gearbox is made in the form of a worm gear, the brackets are removable, and the support is made in the form of a set of cones inserted sequentially one into another (RU 12719 U1, 2000)

Such an installation cannot be used for mounting antenna devices at high altitudes so that it can withstand the necessary conditions for wind and ice loads.

A support is also known for mounting on it, for example, outdoor lighting fixtures, comprising a base and hollow sections with metal walls inside, connected by ends to obtain a given support height (RU 16538 U1, 2001).

However, this technical solution has significant disadvantages:

- for the transportation of sections, the use of long vehicles is required, which is difficult in urban (or other) development;

- when assembling such structures, significant space is required to accommodate crane equipment and vehicles.

The closest technical solution to the proposed one is a cellular radio mast containing a base and hollow inside the section with metal walls, connected by the ends to obtain a given height of the radio mast, the sections are made in the form of cylindrical pipes of different diameters, the bond strength of which is achieved by means of a flange connection, while the base of the radio mast is buried in a reinforced concrete foundation, in the body of which there are horizontally laid channels for passing inside the radio mast power cables, communication cables, and lighting. The lower section of the radio mast has the largest diameter equal to the diameter of the base, and each subsequent section is made of a smaller diameter in relation to the downstream section. The flange of the lower section is attached to the flange of the base end-to-end with an installation clearance by means of, for example, six studs with adjusting and locking nuts. On the lower section, at a height of 0.3 m from the level of the basement flange, terminals are provided, two on opposite sides for connecting protective earth. Each section, starting from the second after the lower section, has end-sections, for example, 1 m long, with spaced apart and fixing circular shoulders, with which bolts inserted by end-sections into each other sections are fastened together. In each section, at least one technological hole is made for securing the cables passing inside the radio mast after installation. Technological holes are made on one of the middle sections and on the upper section, intended for equipping hermetic I / O of electric lighting cables, fiber optic cables and high-frequency cables. The radio mast is equipped with a rack for attaching antenna devices to it, the rack is attached to the upper section through its flange using hook bolts, curved part inserted into the holes provided in the end of the upper section. The sections were coated with hot galvanizing with a thickness in the range of 60-100 microns (patent of the Russian Federation for utility model No. 28507 U1).

The disadvantages of the known design include the complexity of its assembly due to the presence of a flange connection that requires accurate alignment of the sections, and given the size of the sections this requires a lot of labor

The task solved by this utility model is to provide the ability to adjust the angular position of the rack for mounting antenna devices, as well as to ensure ease of assembly of the support while minimizing the area for its installation and reliability under conditions of wind and ice loads.

The following signs are common with the closest analogue. The support comprises consecutively arranged in height and interconnected base, sections in the form of cylindrical metal pipes and a rack for mounting antenna devices located above the upper section and connected to it by a flange connection using hook bolts, a curved part inserted into holes made in the end part top section.

The distinguishing features of the utility model are the following essential features: in the flange connection of the rack intended for mounting the antenna devices with the upper support section, the rack flange for mounting the antenna devices is made with arcuate slots for hook bolts to allow movement relative to the hook bolts installed in the walls of the upper section support and passed through holes in the flange of the upper section of the support. At the same time, the rack flange for mounting the antenna devices is made with a central hole and a conical protrusion, and the upper section is equipped with a mating element attached to it - a disk, also made with a central hole and with a tapered recess under the conical protrusion of the rack flange for mounting the antenna devices.

A particular essential feature of the utility model is the implementation of the lower section with the largest diameter equal to the diameter of the base, and each subsequent section is made of a smaller diameter with respect to the downstream section.

The technical result from the use of the utility model is the ability to adjust the angular position of the rack for mounting the antenna devices relative to the upper section of the support when their alignment is guaranteed both during installation and during angular movement of the rack during installation of the antenna to a predetermined position, in addition, assembly of the support is simplified by the ability to adjust the position of the rack by rotating it around a vertical axis. All these properties make it possible to improve the operational qualities of a dual-purpose support. The proposed design of the connection of the upper section with the rack allows you to give new properties to the support, while maintaining the advantages inherent in the closest analogue.

The achievement of the technical result is ensured by the proposed implementation of the docking flange assembly of the upper section of the support and the rack for mounting antenna devices, which allows you to accurately expose the antenna attached to the rack, if necessary, by adjusting its angular position during installation. This simplifies the alignment of the upper section of the support and rack for mounting antenna devices during their installation, thereby simplifying the installation of the upper section with the rack (due to the simpler alignment of these elements) due to the presence of a conical protrusion on the flange of the rack and the counter recess on the disk of the upper section. In addition, interacting conical surfaces simplify and facilitate the adjustment of the angular position of the strut relative to the upper section (exclude displacement due to the sliding of one conical surface over another). The simultaneous use of hook bolts and a rack flange with arcuate slots for hook (L-shaped) bolts allows angular movement of the rack relative to the upper section without the risk of bolts falling out of the joint.

A particular essential feature of the utility model is the implementation of the lower section with the largest diameter equal to the diameter of the base, and each subsequent section is made smaller in relation to the lower section, the same applies to the ratio of the diameters of the rack. The diameter of the rack is less than the diameter of the upper section.

The essence of the utility model is illustrated by drawings, where:

in FIG. 1 shows a general view of a dual purpose support;

in FIG. 2 is a view along arrows AA (with FIG. 1);

in FIG. 3 - section BB (with Fig. 2);

in FIG. 4 - section EE (with Fig. 1);

in FIG. 5 - section GG (with Fig. 1);

in FIG. 6 is a fragment of a rack for mounting antenna devices with a flange with slots welded to it;

in FIG. 7 is a section BB of a rack for attaching antenna devices (with FIG. 5);

in FIG. 8 - connection node of the upper section of the support and rack for mounting antenna devices;

in FIG. 9 shows a rack flange for attaching antenna devices and a disk of the upper support section.

The dual-purpose support is a prefabricated structure made of several hollow metal (steel) sections of a cylindrical shape (see Fig. 1). The number of sections is determined by the specified height of the support (three, four, five or more). In FIG. 1, as an example, a support is shown consisting of three sections: upper 1, middle 2 and lower 3. The support structure also includes a base 4 and a rack 5 for attaching antenna devices. The rack 5 for attaching the antenna (and / or other) devices is mounted and secured by a flange connection on the upper part of the upper section 1. In the upper part of the rack 5 for attaching the antenna devices there is a lightning rod. In section 3, a revision window is cut, which is closed by a door, and a flange with kerchiefs is welded to the lower end of section 3 to connect to the base 4. Bezels with threaded holes are welded behind the revision window for fastening inside the support of input / output devices of base station systems and / or equipment protection and switching of street lighting systems.

The base 4 is buried in a reinforced concrete foundation 6, which provides free laying of communication and power cables along horizontal channels 7 from a trench from the earth's surface into the internal cavity of the support. The fastening of the base 4 to the reinforced concrete foundation 6 using an anchor group consisting, for example, of twelve studs, allows you to adjust the verticality of the support.

All cylindrical sections 1, 2, 3 are made of different diameters, selected so that the end part 13 of the middle section 2 can be installed in the cavity from the upper end 14 of the lower section 3, which has the largest diameter, and the end part of the upper section is installed in the middle section 2 1, etc., if the support sections are more than three.

The connection of the sections with each other is shown in FIG. 4 by the example of sections of the middle section 2 and the lower section 3. The end part 13 of the middle section 2 is equipped with two persistent circular shoulders 15, one of which is placed near the lower end of the middle section 2, the second - at a distance of about a meter from the lower end of the middle section 2 (size calculated in each case for specific conditions). The outer diameter of the persistent circular shoulders 15 corresponds to the inner diameter of the section 3, to allow the end part 13 of the middle section 2 to enter the cavity of the lower section 3 from the side of its upper end. Close to the second circular shoulders 15, fixing circular shoulders 16 are made. The diameter of the locking circular shoulders 16 is equal to the outer diameter of the lower section 3. The sections are connected by inserting the bottom of section 2 into the upper part of section 3 until the locking circular shoulders 16 stop in the end of section 3. Fixing the connection, and also the alignment of the sections is carried out by eight fixing bolts 17 and locknuts. Fixing bolts 17, fastening one section to another, are inserted between the second thrust shoulders 15 and the fixing shoulders 16.

In the same way, the middle section 2 and the upper section 1 are interconnected.

The connection of the base 4 and the lower section 3 is shown in FIG. 2 The base 4, the diameter of which is equal to the diameter of the lower section 3, is attached to the flange 8 of the lower section 3 through the flange 9 end-to-end in compliance with the installation clearance 10. The base 4 and the lower section 3 are fastened using studs 11 and lock nuts 12. This connection allows assembly time and support installation to ensure strictly vertical position of sections 1, 2, 3 relative to the base 4.

Rack 5 for mounting antenna devices 18 or other related devices is single-stage. The connection of the rack 5 for mounting the antenna devices with the upper section 1 is made by flange connection with bolts and nuts. The flange 19 with the scarves of the rack 5 is welded to the rack 5 and connected to the disk 26 welded to the upper section 1 using hook (L-shaped) bolts 20, which are fixed at one end in the side holes 21 made in the wall of the upper section 1, and others enter the holes and slots of the flange 19 and the disk 26 and are then fixed with nuts. To obtain a flange connection, the disk 26 has round holes for the passage of the hook bolts 20, and the flange 19 is made with arcuate slots 25 (Fig. 6 and Fig. 7) also designed for the passage of the hook bolts 20 and allowing the flange 19 to be moved relative to the hook bolts 20 In other words, the arcuate slots in the flange 19 when loosening the bolt connection allow you to rotate the rack 5 with a welded flange 19 relative to the upper section 1 of the support, for example, for accurate and efficient location of the antenna. In order to ensure the alignment of the rack 5 and the upper section 1 of the support during assembly and when tuning the antenna, i.e. in the case of angular movement of the rack 5 relative to the upper section 1, the flange 19 of the rack 5 is made with a conical protrusion 27, and the disk 26 of the upper section 1 is with a mating conical recess 28.

The most common for use in urban environments are supports consisting of five sections. The lower section 3 can be performed with a two-stage total working height of 9 m to ensure the unification of its appearance with supports of city lighting (such as supports OS-3.0-9.0 according to the classification of the "Catalog of unified steel supports of the contact network of urban electric transport", Mosgortransniiproekt, code 130-499). In the support sections at a height of 9.5 m and at a height of 23, 4 m, holes 22 are usually provided for input-output of communication cables, and at a height of 10 m there is another hole for input-output of a power cable. In addition, in each section 1, 2, 3, technological holes 23 are made to fasten the cables inside the support after installation. These openings are closed with covers or doors to prevent ingress of atmospheric precipitation. At the top of the extension, an air terminal rod 0.8 m high is mounted.

Assembling the dual-use supports is as follows.

Base 4 is installed in the pit and concreted. At least two studs from the mounting kit (or bolts of a different mounting method) must be connected by welding to the reinforcement of the reinforced concrete foundation or metal structure. If it is not possible to meet the requirements of this paragraph, it is necessary to apply special lightning protection measures in accordance with the "Instructions for the Lightning Protection Device for Buildings, Structures and Industrial Communications" 2008

Assembling the support sections is as follows:

- lay the support sections 2 and 3 on the goats; the sections must be slinged either with nylon slings or with metal cables passed into rubber-fabric sleeves;

- sling section 2 at the center of gravity, align the axis of the sections, insert the end part 13 of section 2 into the upper end part 14 of section 3, all the way into the locking circular shoulders 16;

- using the fixing bolts 17 located between the thrust circular shoulders 15 and the fixing circular shoulders 16, adjust the alignment of the sections with an accuracy of 0.5 °;

- tighten and lock the fixing bolts 17 with nuts;

Section 2 is similarly connected to the upper section 1.

Next, connect the rack 5 for attaching the antenna devices to the upper section 1. To do this, install the hook (L-shaped) bolts 20 in the holes 21 in the wall of the upper section 1, the other end of the bolts 20 lead out through the holes in the disk 26 of section 1, align the axes of section 1 and racks 5 for attaching antenna devices, ensuring alignment of the racks 5 and the upper support section 1 using a conical protrusion 27 on the flange 19 and a counter conical recess 28 on the disk 26, while introducing the end parts of the hook bolts 20 into the arcuate slots 25 of the flange 19. U they mount on the rack 5 all the necessary equipment (antennas, etc.), the cable is attached at one end to the nylon sling, with the other - the support is lifted to the hole in the flange scarf with the lifting mechanism and installed on the flange 9 of the base 4 with the studs 11 passed through it, orienting the direction of the revision window. The upper nuts 4 are screwed completely to the studs 11. Using the theodolite, adjusting the positions of the adjusting and locking nuts 12, install the support shaft with an axis deviation from the verticality of not more than 0.002, measured from the flange to the upper point in two mutually perpendicular directions. At the final stage of the support installation, the cables are mounted and the mounting holes are closed.

Claims (3)

1. A dual-purpose support, comprising sequentially interconnected base, sections in the form of cylindrical metal pipes and a rack for mounting antenna devices located above the upper section and connected to it by a flange connection using hook bolts inserted into holes made in the walls of the end of the upper section, characterized in that in the flange connection of the rack with the upper support section, the flange welded to the rack is made with arcuate slots along hook bolts, and the hook bolts, inserted in holes in the wall of the end portion of the upper section, passed through arcuate slots in the strut flange and fixed with nuts. 2. Support according to claim 1, characterized in that the rack flange is made with a conical protrusion, and the upper rack is equipped with a disc welded to it and made with a mating conical recess for the conical protrusion of the rack flange and holes for hook bolts. 3. Support according to claim 1, characterized in that the lower section has the largest diameter equal to the diameter of the base, and each subsequent section is made of a smaller diameter with respect to the downstream section, while the diameter of the rack is less than the diameter of the upper section.

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