RU215200U1 - Fixing Device for Power Line Pole - Google Patents

Abstract

The utility model relates to elements of building structures, is intended for power transmission line supports and can be used in the construction of prefabricated monolithic foundations for power transmission line supports. Claimed is a locking device for a power line support, having a mushroom shape and consisting of a horizontally oriented plate and a vertically oriented rack, made with the possibility of bolted connection. The bolted connection is provided by means of a bushing welded to the plate and a coupling welded to the column, at the upper end of the column a platform is welded, which can be connected to the power transmission line support. The plate and platform are provided with stiffeners, while the stiffeners are in the form of right-angled triangles with sharp cut corners, the legs of which are welded to the plate and to the bushing, to the post and platform, respectively, while all elements of the fixing device are made of metal. The technical result is to increase the strength, stability and reliability of the fixing device for power transmission line support; providing the possibility of quick installation of a stable design of the fixing device for the power transmission line support, regardless of the terrain and climatic characteristics of the area. 6 w.p. f-ly, 6 figs.

Description

The utility model relates to elements of building structures, is intended for power transmission line supports and can be used in the construction of prefabricated monolithic foundations for power transmission line supports.

BACKGROUND OF THE INVENTION

Power transmission line supports are one of the most complex elements of a power transmission line (TL). When designing and building these structures, it is necessary to take into account both climatic and soil characteristics of the area. Currently, the developers of supports and their elements are striving to reduce the cost of production and increase the strength characteristics of products.

To ensure strength, power transmission line supports can be fixed on fixing devices (pedestals, bases, foundations, etc.), which are a reinforced concrete or metal structure, usually mushroom-shaped, with bolts or holes for fastening power transmission line supports. Power transmission line supports over 6 m must be accompanied by fixing devices.

From the prior art, various structural elements are known for fixing power transmission towers.

So, in the patent CN215595158, published on 07/01/2021, a utility model is disclosed, which relates to a fixing structure for a reinforced concrete transmission line tower. The fixing structure contains a foundation, a reinforcing pier, a pair of upper support heads and a reinforcing column, while the middle lower end of the reinforcing pier is buried in the upper part of the foundation, the middle lower ends of the upper support heads are embedded in the upper part of the reinforcing pier, and in the upper part of the upper mooring head is installed fixing column. A flange assembly is installed in the upper part of the fixing column. Install the reinforcing pier and head of the upper berth on the foundation so that the support force on the foundation of the transmission line tower is maintained, the foundation of the iron tower tower is prevented from lowering, and the reinforcing protection of the foundation of the transmission line tower is achieved, while the reinforcement columns can be clamped and reinforced by the foundation in all directions so that the base of the transmission tower is more dense; and by arranging the insert plates and the mounting posts, the support force can be applied to the two sides of the reinforcing towers so that the base of the transmission tower is not subject to inclination and deflection during sedimentation.

An invention is also known (patent WO2010047618, published on 10/07/2009), which relates to the field of construction, namely, to shallow foundations, and can be used in the construction of prefabricated monolithic foundations for columns, supports, masts, power line supports, etc., erected on a natural or artificial foundation in the construction of buildings and structures for various purposes, including the construction of strip or column foundations. The technical objective of the invention is to simplify the design, reduce the metal consumption and increase the bearing capacity of a shallow foundation erected under a column, support, mast, power line support on a natural or artificial foundation, including when installing strip or column foundations. The problem is solved by the fact that in the proposed technical solution, the supporting part is equipped with lower and upper reinforcing meshes, and the stiffeners are placed in the form of at least three beams coming out of one center located on the vertical axis of the foundation, made in the form of bent profiles and equipped with stiffening elements, moreover, the stiffening ribs are installed between the lower and upper reinforcing meshes, and the elements for attaching the column structure to the foundation part are made in the form of reinforcing leads. In addition, the bent profile of the stiffener is made in the form of a sinusoid, and the stiffeners are installed along each stiffener in pairs on both sides.

Patent RU2451136C1, published on May 20, 2012, discloses the foundation of a transmission line support and a method for increasing its durability. The foundation of the transmission line tower includes a base plate and a rack located on it. The value of the protective layer of concrete up to the working reinforcement of the rack has a variable value and varies depending on the operating conditions of the concrete along the height of the rack. The technical result is to increase durability and reduce operating costs.

The disadvantages of these analogs are the massiveness and volume of the structure as a whole (they are massive reinforced concrete footboards with significant weight), the cost of their transportation to the facility, as well as the assembly time.

A useful model is also known (RU181319U1, published on February 27, 2009), which relates to the field of construction, namely, mushroom-shaped foundation structures, and can be used in the installation of overhead power lines for the construction of foundations for metal, reinforced concrete or combined racks or supports. The mushroom-shaped foundation contains a base plate and a post mounted on it, connected to the base plate by means of a bolted connection. The rack has two mounting plates protruding horizontally from both sides relative to the rack, and each of which has three holes. At the same time, the base plate in the central part has an elevation in the form of a truncated pyramid, in which six fixing bolts are installed, placed in the indicated holes of the fixing plates. Moreover, the mounting plates are fixed with nuts. EFFECT: increased strength and durability of the structure.

The utility model (RU181281U1, published on 07/09/2018) relates to the field of construction, namely to the structures of mushroom-shaped foundations and can be used in the installation of overhead power lines for the construction of foundations for metal, reinforced concrete or combined racks or supports. The foundation contains a base plate and a post connected to it, made tapering towards the top. The base plate is provided with two horizontal keyways, and the stand in the lower part is provided on both sides with horizontal protrusions placed in the said keyways. In this case, the horizontal protrusions of the post have a wedge-shaped profile with a narrowing in the peripheral direction relative to the axis of the post and are placed in the key grooves to ensure direct contact of the outer surface of the horizontal protrusions with the inner surface of the key grooves having a geometry in response to the horizontal protrusions of the post. The technical result is a simplification of the assembly and installation of the foundation.

One of the disadvantages of the known devices described above is the complexity of their manufacture and assembly due to the complexity of the geometry of their elements.

The closest analogue of the proposed utility model is the technical solution known from patent document RU56905U1, published on September 27, 2006. This source discloses a shallow metal foundation, consisting of metal elements and parts, contains a horizontal support element and vertical stiffeners fixed on top of it, carrying the support parts installed above for the structures of the above-ground part of the building. A shallow metal foundation can be provided with distribution elements to combine it into joint operation with adjacent shallow metal foundations. The cavities formed by the elements and details of the shallow metal foundation can be concreted. Elements and parts of a shallow metal foundation can be protected with an anti-corrosion coating. The technical solution provides for an increase in the bearing capacity of a shallow metal foundation and, due to this, an expansion of the area of its possible use, including for the construction of buildings and structures for various purposes in areas of permafrost.

The disadvantage of the closest analogue is that the proposed fastening of the stiffeners and their design does not provide sufficient strength and stability of the structure. In addition, filling the cavities with concrete significantly increases the weight of the structure.

Thus, the analysis of the prior art has shown that there is a need to create a fixing device for the power transmission line support, which would eliminate all the above disadvantages of the known solutions.

DISCLOSURE OF UTILITY MODEL

The technical result to be achieved by the proposed solution is:

- increasing the strength, stability and reliability of the fixing device for the power transmission line support;

- ensuring the possibility of quick installation of a stable design of the fixing device for the power transmission line support, regardless of the terrain and climatic characteristics of the area.

The claimed technical results are achieved by the fact that a fixing device for a power line support is proposed, having a mushroom shape and consisting of a horizontally oriented plate and a vertically oriented rack, made with the possibility of bolted connection, while the bolted connection is provided by means of a sleeve welded to the plate and welded to rack with a coupling, at the upper end of the rack a platform is welded, made with the possibility of connection with a power line support, the plate and the platform are equipped with stiffeners, while the stiffeners are in the form of right-angled triangles with cut sharp corners, the legs of which are welded to the plate and to the bushing, to the rack and platform, respectively, while all elements of the fixing device are made of metal.

The rack is a tube of circular cross section, the coupling is made in the form of a hollow cylinder, the bushing has a cylindrical shape, while the conditional passage of the coupling is equal to the outer diameter of the bushing.

The bushing and the coupling are provided with round through holes made with the possibility of alignment with each other, and the bolted connection is made by means of bolts with nuts fixed in the aligned holes of the bushing and the coupling.

The number of stiffeners is a multiple of two, while the angle between the stiffeners can be calculated by the formula: the angle between the stiffeners = 360 degrees / the number of stiffeners.

The side of the slab is 3.1-3.3 times the side of the platform, the height of the slab with a sleeve welded to it is 0.2-0.23 of the height of the column with a sleeve welded to it, and the height of the fixing device as a whole correlates with the side of the slab as 1.7 -2.0 to 1.

For connection with a power transmission line support, the platform is provided with round through holes.

All elements of the fixing device can be coated with an anti-corrosion coating with a layer 100-150 microns thick.

BRIEF DESCRIPTION OF THE DRAWINGS

On FIG. 1 shows a general view of the locking device.

On FIG. 2A is section 1-1 showing a general view of the locking device.

On FIG. 2B is section 2-2 showing a general view of the locking device.

On FIG. 3A shows the shape of the platform stiffeners.

On FIG. 3B shows the shape of the plate stiffeners.

On FIG. 4 shows a view of the junction of the sleeve and the coupling of the locking device.

The following items are indicated on the drawings: plate (1), column (2), bushing (3), coupling (4), round through holes (5) bushings, round through holes (6) couplings, platform (7), round through holes (8) platforms, fasteners (9), stiffeners (10) plates, stiffeners (11) platforms.

ESSENCE OF THE UTILITY MODEL

The claimed solution is a locking device for a power line support, which has a mushroom shape and is a structure consisting of a horizontally oriented plate (1) and a vertically oriented rack (2), made with the possibility of bolted connection (Fig. 1).

Plate (1) is made in the form of a square-shaped sheet (Fig. 2B). The plate (1) is made of metal, i. e. from metals or their alloys. The thickness of the plate (1) may be from 10 to 18 mm, most preferably from 14 to 16 mm.

In the center of the plate (1) a sleeve (3) of a cylindrical shape is welded, provided with round through holes (5) (Fig. 1, 4).

The sleeve is designed to provide a bolted connection of the plate (1) and the rack (2). The design of the plate (1) with a bushing (3) welded to it increases the strength of the plate and the device as a whole, providing a reliable connection with the column (2) without weakening the plate itself with holes.

Rack (2) is a tube of circular cross section (Fig. 1, 2A, 4). The stand (2) is made of metal, i. e. from metals or their alloys. The outer diameter of the rack (2) of the plate may be from 219 to 530 mm, most preferably from 219 to 325 mm, the wall thickness of the pipe may vary from 8 to 16 mm.

The cavity of the column pipe (2), as well as the cavity of the sleeve (3) can be filled with filler. As a filler, a standard filler applicable for the purpose of filling building structures, for example, hydrophobic polyurethane foam, can be selected.

At the lower end of the rack (2) a sleeve (4) is welded, made in the form of a hollow cylinder and provided with round through holes (6) (Fig. 1, 4). The outer diameter of the coupling (4) is made larger than the outer diameter of the rack (2) (Fig. 1, 4), while the nominal bore of the coupling (4) is equal to the outer diameter of the sleeve (3).

The holes (5) of the sleeve (3) are coaxial with the holes (6) of the coupling (4) and have the same diameter, i.e. holes (5) and (6) are made with the possibility of alignment with each other. The bolted connection of the bushing (3) and the coupling (4) is made, for example, by means of bolts with nuts fixed in the matching holes of the bushing (3) and the coupling (4). The junction of the sleeve (3) and the coupling (4) is illustrated in Fig. four.

At the upper end of the rack (2) a platform (7) of square shape is welded (Fig. 1, 2A, 4).

For connection with the transmission line support, the platform (7) is provided with round through holes (8) (Fig. 2A). Round through holes (8) can be provided with fasteners (9) in the form of bolts with washers and nuts (illustrated in Fig. 1).

The design of the rack (2) with a coupling (4) welded to it and a platform (7) increases the strength of the rack and the device as a whole, providing a reliable connection with the plate (1) and the power transmission line support without weakening the rack itself with holes.

Plate (1) and rack (2) are provided with stiffeners.

The plate (1) is provided with stiffening ribs (10) having the shape of a right-angled triangle with cut sharp corners (Fig. 3B). The legs of the stiffeners (10) are fixed on the plate (1) and the sleeve (3) by welding (welds are shown in Fig. 1, 2B).

On the site (7) stiffening ribs (11) are made, having the shape of a right-angled triangle with cut sharp corners (Fig. 3A). The legs of the stiffeners (11) are fixed to the post (2) and the coupling (4) by welding (welds are illustrated in Fig. 2A).

The stiffening ribs (10, 11) and their design increase the strength, stability and safety of the fixing device as a whole, providing a reliable rigid connection of all elements of the device.

The number of stiffeners (10, 11) is a multiple of two, while the angle between stiffeners can be calculated by the formula: angle between stiffeners = 360 degrees / number of stiffeners. So, for example, when the number of stiffeners (10, 11) is equal to four, the angle between them is 90 degrees, with six stiffeners (10, 11) the angle between them is 60 degrees, with eight - 45 degrees, etc. On FIG. 1 illustrates an embodiment of the utility model with eight stiffeners (10) and four stiffeners (11). The number of stiffeners (10) of the plate (1) and stiffeners (11) of the platform (7) can be the same.

All elements of the fixing device (plate (1), stand (2), bushing (3), coupling (4), stiffeners (10, 11)) are made of metal, i.e. from metals or their alloys. Metals and their alloys have the necessary structural strength (structural strength is a complex characteristic of a material that combines the criteria of strength, rigidity, reliability and durability). The metals or their alloys can be iron or steel.

To protect against mechanical and/or chemical influences, all elements of the fixing device can be covered with a corrosion-resistant coating with a layer 100-150 µm thick. As an anti-corrosion coating, any standard coating applicable to the protection of building metal structures can be chosen, for example, a two-pack paint based on a modified epoxy.

The high structural strength of all elements of the fixing device, their shape and relative position can increase the strength of the device as a whole, ensure its stability and reliability, extend the service life of the device and the safety of its use. Also, these features of the fixing device make it possible to reduce the installation time of the device, including due to the structural possibility of a bolted connection with a power transmission line support, rather than a welded one.

In particular cases of the proposed technical solution, the ratio of the dimensions of the fixing device is as follows. The side of the plate (1) is 3.1-3.3 times the side of the platform (7), the height of the plate (1) with a sleeve (3) welded to it is 0.2-0.23 of the height of the column (2) with a coupling welded to it (4), and the height of the fixing device as a whole correlates with the side of the plate (1) as 1.7-2.0 to 1.

The manufacture of the proposed device according to the above ratios of sizes allows you to further increase the stability of the fixing element during its installation.

The utility model according to the proposed technical solution can be completely manufactured in the factory. The design features of the claimed fixing device (structural elements, their shape and material) determine the possibility of a quick and easy stable installation, regardless of the terrain and climatic characteristics of the area.

IMPLEMENTATION OF UTILITY MODEL

To verify the implementation of the declared purpose and achieve the stated technical results, several batches of fixing devices for power transmission towers were manufactured according to the proposed utility model.

All fixing devices were made in a mushroom shape in the form of a horizontally oriented plate and a vertically oriented rack, connected by a bolted connection. The bolted connection was provided by means of a sleeve welded to the plate and a coupling welded to the post. At the upper end of the rack, a platform with round through holes was welded for connection with the power transmission line support. The slab and platform were provided with stiffening ribs in the form of right triangles with cut sharp corners. The plate stiffeners with their short sides (legs) were welded to the bushing and to the plate, and the platform stiffeners were welded to the post and platform. All elements of the fixing device were made of metal.

To illustrate the execution of the claimed utility model, Table 1 shows data on 4 manufactured structures.

Table 1 Design 1 Construction 2 Design 3 Design 4 Production material steel* steel* iron steel* Number of platform holes 6 four 2 four Number of sleeve holes 2 3 3 four Number of coupling holes 2 3 3 four Number of plate stiffeners 2 four 6 four Number of platform stiffeners four eight 6 eight Plate side, mm 1550 1500 1450 1400 Platform side, mm 500 480 440 460 Rack height with coupling, mm 2500 2300 2400 2250 Plate height with bushing, mm 500 500 550 450 Device height, mm 3000 2800 2950 2700

* - steel C245 according to GOST 27772 with impact strength in accordance with SP16.13330.

In Designs 1, 2 and 4, hollow cylindrical elements (sleeve, post) were filled at the factory with hydrophobic polyurethane foam "VLADIPUR 3021" with a density of 20-40 kg/m³. Anticorrosion protection was applied at the factory on structures 2-4 with a two-component paint "Tematar TFA", the layer on structure 2 was made 100 μm thick, on structure 3 - 150 μm thick, on structure 4 - 120 μm thick.

Experiments for each design were carried out on different types of terrain (ordinary soil, coarse and rocky soil, permafrost) and with different types of power transmission line supports (anchor, intermediate, transitional and special).

The results of the experiments showed an increase in the strength, stability and reliability of the structure of the power transmission line support, regardless of the type of support. Also, it was possible to quickly install a stable structure, regardless of the terrain, soil type and climatic characteristics of the area.

Thus, the claimed utility model allows to achieve all the claimed technical results.

Claims (7)

1. A fixing device for a power line support, having a mushroom shape and consisting of a horizontally oriented plate and a vertically oriented rack, made with the possibility of bolted connection, characterized in that the bolted connection is provided by a sleeve welded to the plate and a coupling welded to the rack, on at the upper end of the post, a platform is welded that can be connected to a power line support, the plate and the platform are equipped with stiffeners, while the stiffeners are in the form of right-angled triangles with cut sharp corners, the legs of which are welded to the plate and to the bushing, to the post and platform, respectively, in this case, all elements of the fixing device are made of metal. 2. The device according to claim. 1, characterized in that the rack is a pipe of circular cross section, the coupling is made in the form of a hollow cylinder, the sleeve has a cylindrical shape, while the conditional passage of the coupling is equal to the outer diameter of the sleeve. 3. The device according to claim 1, characterized in that the sleeve and the sleeve are provided with round through holes, made with the possibility of alignment with each other, and the bolted connection is made by means of bolts with nuts fixed in the aligned holes of the sleeve and the sleeve. 4. The device according to claim 1, characterized in that the number of stiffeners is a multiple of two, while the angle between the stiffeners can be calculated by the formula: the angle between the stiffeners = 360 degrees / number of stiffeners. 5. The device according to claim 1, characterized in that the side of the plate is 3.1-3.3 sides of the site, the height of the plate with a sleeve welded to it is 0.2-0.23 of the height of the rack with a coupling welded to it, and the height of the fixing device as a whole correlates with the side of the plate as 1.7-2.0 to 1. 6. The device according to claim 1, characterized in that the platform is provided with round through holes for connection with the power transmission line support. 7. The device according to claim. 1, characterized in that all elements of the fixing device can be covered with an anti-corrosion coating with a layer 100-150 microns thick.

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