RU108071U1 - MAST - Google Patents

Abstract

 1. A mast comprising at least two series-connected and having a rectangle-shaped cross-section, an upper section in the form of a rectangular parallelepiped and a lower section in the form of a rectangular truncated pyramid, each section is made of four forming the face sections of the connected trusses, each truss is made in in the form of longitudinal side elements, which are steel corners, which are inseparably interconnected by an intermediate set of structural elements, with one shelf of each corner being oriented is oriented in the direction parallel to the truss plane, and the second perpendicular to the truss plane, trusses are connected by pairing a pair of longitudinal side elements with the formation of a composite profile in the form of a rectangular pipe using two groups of bolt joints oriented mutually perpendicularly, installed in parallel parallel holes for each bolt connection shelves of conjugated corners, while for each bolted connection in the zone of its location on the shelf with an opening of each of the conjugated corners A hard stop is placed on the inner side along the edge of the shelf, which is in contact with the inner surface of the edge parallel to the axis of the bolt connection of the mating shelf of the adjacent corner. ! 2. The mast according to claim 1, characterized in that the bolted joints oriented mutually perpendicularly are arranged alternating along the length of each pair of conjugated longitudinal side elements. ! 3. The mast according to claim 1, characterized in that the upper and lower sections are connected by patch plates, which are installed in pairs at the corners of the sections, and each is connected to the connected

Description

The utility model relates to construction, and specifically to masts, mainly floodlights, which allow placing any equipment at a considerable height, in particular floodlights, which illuminate vast areas of energy, industrial or transport enterprises, sports facilities, various protected areas and the like.

Known support mast, which, in particular, can be used to position the floodlights at a height, containing sections made of pipes of different diameters, interconnected using flanges through bolted joints to form a rack of variable cross section. On top of the rack is a platform for placing equipment, secured with support braces. The lower part of the rack through the supporting heel is mounted on a concrete foundation grillage. A ladder is fixed on the rack along the entire height, allowing it to climb to the site for the installation of equipment and its maintenance (RU 85529 U1, IPC Е04Н 12/08 (2006.01), 2009).

The sections in the form of pipes of this known mast-mast occupy a considerable volume and cannot be transported compactly to the installation site of the mast mast. Vehicles, as a rule, are capable of transporting only one set of elements at a time to the installation site of one mast and cannot deliver several sets of elements for the construction of a group of masts in any territory or along any extended section.

A known power transmission tower support which can be used as the vertical part of a mast, comprising in series connected and having a cross-section in the form of a rectangle, an upper section in the form of a rectangular parallelepiped and a lower section in the form of a rectangular truncated pyramid (RU 2330925 C1, IPC ЕН 12/08 (2006.01), 2008).

Each section of this known rack is made up of four facet sections of connected trusses. Each truss is made in the form of longitudinal lateral elements (belts), which are steel corners that are inseparably interconnected by an intermediate set of structural elements, with one shelf of each corner oriented in a direction parallel to the section plane, and the second perpendicular to the section plane. The trusses are connected to the section by pairing a pair of longitudinal side elements with the formation of a composite profile in the form of a rectangular pipe using two groups of mutually perpendicularly oriented bolted joints installed with alternating along the length of each pair of mating angles in the holes parallel to the shelves of the mating angles coaxial for each bolt connection.

The set of structural elements in the known structure at each truss is a series of parallel parallel transverse steel elements connected by ends to steel corners, and in each section between all transverse steel elements of half-bevel pairs, passing from the nodes of the connection of one transverse steel element to steel corners to the middle the next transverse steel element in the direction corresponding to the direction from top to bottom. Sections of the known rack can be made with a cross section in the form of a square or rectangle, and the longitudinal side elements of the trusses - in the form of both equal and opposite shelves steel corners.

This rack of known design is assembled directly at the installation site from flat trusses, prefabricated in the factory, which can be easily transported, including several sets of racks at the same time.

However, when operating the known rack, when it is used to support the power line, the main bending load is applied in the direction of the wires. In the transverse direction, the bending load is much less. This circumstance determines the feasibility of a rectangular cross-section of the rack when using power lines to support. At the same time, loading with wires leads to a decrease in the level of dynamic effects on the rack; the frequency and amplitude of its possible vibrations are reduced. The loading is great, but largely static and uniform.

In the case of the use of such a rack as a mast for placing any equipment at a height, it will be more susceptible to multidirectional oscillatory influences due, in particular, to the wind load. In this case, the vibrations can lead to a displacement of the pairs of longitudinal side elements relative to each other in the form of angles forming a composite profile in the form of a rectangular pipe, which will lead to the loss of the stop of these angles against each other under the action of a bolted joint, which in this case will weaken and lead to the loss of the bearing capacity of the composite profile in the form of a rectangular pipe and, as a consequence, to the loss of the bearing capacity of the mast structure as a whole, which in this case may collapse. This possibility is especially relevant in the case when bolted joints fastening pairs of longitudinal side elements in the form of angles in a composite profile in the form of a rectangular pipe are arranged with a significant step, while its possible reduction will lead to unreasonably high labor costs for assembling the mast due to unreasonable amount of bolted connections.

The technical result of the utility model is to increase the bearing capacity of the mast by eliminating the possibility of loss of strength by sections of the rack.

This technical result is achieved by the mast, which contains at least two series-connected and having a cross section in the form of a rectangle, the upper section in the form of a rectangular parallelepiped and the lower section in the form of a rectangular truncated pyramid.

Each section is made of four sections forming the faces of the connected trusses, and each truss is made in the form of longitudinal side elements, which are steel corners, which are inseparably interconnected by an intermediate set of structural elements, with one shelf of each corner oriented in the direction parallel to the truss plane, and the second is perpendicular to the truss plane.

The trusses are connected with the pairing of a pair of longitudinal side elements with the formation of a composite profile in the form of a rectangular pipe using two groups of bolted joints oriented mutually perpendicularly, installed in the holes of the parallel shelves of the mating corners coaxial for each bolt connection.

At the same time, for each bolt connection in the zone of its location on the shelf with the hole of each of the mating corners, a hard stop is placed on the inner side along the edge of the shelf contacting the inner surface of the edge parallel to the axis of the bolt connection of the mating shelf of the adjacent corner.

In the best embodiment of the utility model, mutually perpendicularly oriented bolted joints are arranged alternating along the length of each pair of conjugated longitudinal side elements.

Also in the best embodiment of the utility model, the upper and lower sections are connected by patch plates, which are mounted in pairs at the corners of the sections and each is connected to bolted joints by sections. Moreover, it is preferable that in each pair of patch plates the bolt connections of one plate are alternated with the bolt connections of the other plate, and for each bolt connection with the patch plate in the area of its location on the shelf with the hole of each of the corners mated in the area of the location of the plates, placed from the inside side on the edge of the shelf hard stop in contact with the inner surface of the edge parallel to the axis of the bolt connection of the conjugate shelf adjacent corner.

Also in the best embodiment of the utility model, the mast is provided with shoes mounted on a larger base of the lower section for mounting the mast on the foundation. The shoes are made with flanges for interaction with the foundation, and on each flange two plates are oriented rigidly oriented relative to each other at right angles and connected to the corners of one longitudinal side element of the lower section by bolted connections. It is preferable when for each shoe the bolted connections of one plate are alternated with the bolted connections of the other plate, and for each bolted connection to the plate in the zone of its location on the shelf with the hole of each of the corners mated in the area of the plates is placed on the inner side along the edge shelves hard stop in contact with the inner surface of the edge parallel to the axis of the bolt connection of the conjugate shelf of an adjacent corner.

In all cases, the use of a hard stop in the best embodiment, it is made in the form of a welded steel element. Preferably, when a bar segment is used as such an element.

A set of structural elements of each truss connecting the longitudinal side elements in the form of steel corners to each other can be made in the form of a series of parallel parallel transverse steel elements welded by ends with steel corners, and in each section between all transverse steel elements of pairs of welded steel half-races, passing from the nodes of the connection of one transverse steel element with steel corners to the middle of the next transverse steel element in the direction corresponding direction from the upper section to the lower. However, depending on the size and the required strength of the mast, the specified set of structural elements may be different.

In particular cases of performing a utility model, sections can be made with a cross-section in the shape of a square, and the longitudinal side elements of the trusses can be equal-angle steel corners. Other particular cases are mentioned below in the description of an example of a particular mast. The mast can be equipped with a support platform mounted on top of the upper section, a ladder fixed inside the cavities of the sections to allow it to climb to the support platform, and at least one rest platform installed inside the cavity of the sections.

The possibility of implementing a utility model is confirmed by a specific example of the implementation of a searchlight mast, which is illustrated by graphic materials:

- figure 1 shows the mast, a General view;

- figure 2 shows the support platform of the mast, a top view;

- figure 3 shows the rest area of the lower mast section;

- figure 4 shows the average recreation area;

- figure 5 shows the upper part of the mast with a support platform;

- figure 6 shows the middle part of the mast in the connection zone of the upper and lower sections;

- Fig.7 shows the lower part of the mast;

- on Fig shows a cross section of the lower part of the mast (shoes not shown);

- Figures 9 and 10 show sections of connected longitudinal lateral elements of trusses in the form of corners in the area of location of bolted joints; bolted connections located relative to each other at an angle of 90 degrees;

- Figures 11 and 12 show a fragment of a longitudinal side element in the form of a corner with a fixed stop: Fig. 11 is a cross section, Fig. 12 is a View A in Fig. 11;

- Fig. 13 and 14 show a shoe: Fig. 13 is a side view, Fig. 14 is a top view (an additional lateral longitudinal element of the truss is shown in the form of conjugate corners).

The mast (Fig. 1) contains two series-connected upper 1 and lower 2 sections, a support platform 3 (Figs. 1, 2, 5) mounted on top of the upper section 1, a ladder 4 (Fig. 1; Figs. 5, 6 7 is not shown), fixed inside the cavities of sections 1 and 2 to enable a person to climb to the supporting platform 3, installed inside the cavity of sections 1 and 2, the rest area 5 (Figs. 1 and 3) of the lower section 1 and the middle rest area 6 (Fig .1 and 4; not shown in Fig. 6). The supporting platform 3 is made with a guard 7 and lightning rods 8. The staircase 4 in the lower section 2 is made with a guard 9 (Figs. 1 and 3; not shown in Figs. 6 and 7), which prevents a person from falling.

The upper 1 and lower 2 sections generally have a cross section in the shape of a rectangle, and in this particular embodiment of the utility model, a square. The upper section 1 has the shape of a rectangular parallelepiped. The lower section 2 has the shape of a rectangular truncated pyramid.

The upper 1 and lower 2 sections are connected by patch plates 10 (Fig.1 and b). On a larger base 11 (FIGS. 1, 7) of the lower section 2 for mounting the mast, shoes 13 are fixed on the foundation 12 (FIGS. 1, 7, 13, 14).

The upper 1 and lower 2 sections (each) are made of four forming facets of sections 1 and 2 of the connected trusses 14 of the upper section 1 and 15 of the lower section 2 (Figs. 5, 6, 7, 8). The trusses 14 and 15 of the upper 1 and lower 2 sections are made similarly, with the exception of the above differences due to the shape, namely: the farm 14 of the upper section 1 has a rectangular shape, and the farm 15 of the lower section 2 has a trapezoid shape.

Each truss 14 or 15 is made in the form of longitudinal side elements, which are steel corners 16 and 17 (Figs. 7, 8, 9, 10, 11, 12; further, the construction of the sections is described by the example of the lower section 2; upper section 1 in part concerning the essence of the utility model, is made similarly), which are inseparably interconnected by an intermediate set of structural elements 18 and 19 (Figs. 1, 5, 6, 7). These structural elements are a series of consecutive parallel transverse steel elements 18, welded by the ends 20 (Fig.7) with steel corners 16 and 17, and in each section between all transverse steel elements 18 pairs of welded steel half bevels 19 passing from the connection nodes 21 one transverse steel element 18 with steel angles 16 and 17 to the middle 22 of the next transverse steel element 18 in the direction corresponding to the direction from the upper section 1 to the lower section 2.

One shelf 23 (Fig. 8) of each corner 16 or 17 is oriented in a direction parallel to the plane of the truss 14 or 15, and the second shelf 24 is perpendicular to the plane of the truss 14 or 15. In this particular example, equal-angle corners 16 and 17 are used as for the top 1 so for the bottom 2 sections. But it is possible to use raznopolokny corners.

The trusses 15 (or 14 similarly) are connected with the pairing of a pair of longitudinal side elements in the form of angles 16 and 17 with the formation of a composite profile in the form of a rectangular pipe (in the concrete example, a square pipe, and in the case of using different-shelf angles - a rectangular one) using two groups of mutually perpendicular bolted connections 25 and 26 (Fig.7, 9, 10) installed in coaxial for each bolt connection 25 or 26 holes located parallel to the shelves 23 and 24 (respectively) of the mating angles 16 and 17. Bolt connections The joints 25 and 26 have the same design, but are arranged alternately (see Fig. 7) along the length of each pair of conjugated longitudinal side elements in the form of angles 16 and 17. That is, bolted joints 25 and 29 at the length of the angles 16 and 17 from one to another they change their position by 90 degrees. For light-loaded masts having a small height, the aforementioned condition of alternation may not be observed either in this or in the cases described below.

For each bolted connection 25 and 26 in the zone of its location on the shelf 23 or 24 (respectively) with the hole of each of the mating angles 16 and 17 is placed on the inner side 27 (Fig.9, 10) along the edge of the shelf 23 or 24 (respectively) hard emphasis 28 in contact with the inner surface 29 of the edge parallel to the axis of the bolt connection 25 and 26 of the mating flange 23 or 24 (respectively) of the adjacent corner 16 or 17.

The hard stop 28 (Figs. 11, 12) is made in the form of a welded steel element, for which, in this particular example, a piece of steel bar is used, but other steel products of any cross section can be used, and even actually undergone minor preparatory processing of various steel profiles.

The use of rigid stops 28 allows tightening together the corners 16 and 17 with bolted joints 25 and 26. This eliminates the possible relative displacement relative to each other of the corners 16 and 17 during operation of the mast, subjected to various dynamic effects and static longitudinal and bending loading.

Overhead plates 10 (Fig.6), which are connected to each other by the upper 1 and lower 2 sections, are installed in pairs at the corners of sections 1 and 2, each connected to the connected sections 1 and 2 by bolt connections 30 and 31.

In each pair of patch plates 10, the bolts 30 of one patch plate 10 are alternated with the bolts 31 of the other patch plate 10.

In the same way as described for the bolted connections 25 and 26 of the corners 16 and 17, for each bolted connection 30 and 31 with the patch plate 10 in the area of its location on the shelf (in detail in the drawings, the assembly of the bolted connection 30 or 31 in the area with patch plates 10 not shown, therefore, the positions of a particular node are not given; the node is similar to the node in Figs. 9 and 10) with an opening of each of the corners 16 and 17 mated in the area of the attachment plates 10 and placed on the inner side along the edge of the shelf a hard stop in contact with the inner surface of the edge couple the axis of the bolt joint 30 or 31 of the mating flange of an adjacent corner 16 or 17 (respectively).

The shoes 13 are made with flanges 32 (Fig. 13, 14) for interaction with the foundation 12 (Fig. 1) and on each flange 32 two plates 33 and 34, oriented with respect to each other at right angles, and an additional thrust plate 35 are rigidly fixed.

Also, in the same way as described for the bolted connections 25 and 26 of the corners 16 and 17, the plates 33 and 34 (Fig. 7) of each shoe 13 are connected to the corners 16 and 17 of the lower section 2 by two groups of bolted connections 36 and 37. Bolted connections 36 one plate 34 are alternated with bolted connections (37) of another plate 33.

At the same time, for each bolted connection 36 or 37 with a plate 33 or 34 in the zone of its location on the shelf (in detail in the drawings, the node of the bolted connection 36 or 37 in the zone with plates 33 or 34 is also not shown, therefore, the positions of a specific node are not given; the node in FIGS. 9 and 10) with an opening of each of the corners 16 and 17 mated in the area of the plates 33 and 34, a hard stop is placed on the inner side along the edge of the shelf, in contact with the inner surface of the edge parallel to the axis of the bolted joint 36 or 37 of the mated shelf16 or 17 (respectively).

Details of the mast made in accordance with this utility model are manufactured using known technologies for the material range used in the construction. The mast is assembled and installed using technologies similar to the assembly and installation of the aforementioned known strut of a power transmission tower support or other known searchlight masts of a similar construction.

Claims (11)

1. A mast comprising at least two series-connected and having a rectangle-shaped cross-section, an upper section in the form of a rectangular parallelepiped and a lower section in the form of a rectangular truncated pyramid, each section is made of four forming the face sections of the connected trusses, each truss is made in in the form of longitudinal side elements, which are steel corners, which are inseparably interconnected by an intermediate set of structural elements, with one shelf of each corner being oriented is oriented in the direction parallel to the truss plane, and the second perpendicular to the truss plane, trusses are connected by pairing a pair of longitudinal side elements with the formation of a composite profile in the form of a rectangular pipe using two groups of bolt joints oriented mutually perpendicularly, installed in parallel parallel holes for each bolt connection shelves of conjugated corners, while for each bolted connection in the zone of its location on the shelf with an opening of each of the conjugated corners A hard stop is placed on the inner side along the edge of the shelf, which is in contact with the inner surface of the edge parallel to the axis of the bolt connection of the mating shelf of the adjacent corner. 2. The mast according to claim 1, characterized in that the bolted joints oriented mutually perpendicularly are arranged alternating along the length of each pair of conjugated longitudinal side elements. 3. The mast according to claim 1, characterized in that the upper and lower sections are connected by patch plates, which are installed in pairs at the corners of the sections, and each is connected to bolted sections by sections. 4. The mast according to claim 3, characterized in that in each pair of patch plates the bolt connections of one plate are alternated with bolt connections of the other plate, while for each bolt connection with the patch plate in the zone of its location on the shelf with the hole of each of the paired in the area where the corner pads are located, a hard stop is placed on the inner side along the edge of the shelf, which contacts the inner surface of the edge parallel to the axis of the bolt connection of the conjugate shelf of the adjacent corner. 5. The mast according to claim 1, characterized in that it is equipped with shoes fixed on a larger base of the lower section for mounting the mast on the foundation, which are made with flanges for interacting with the foundation, and two oriented directly relative to each other under the straight angle plate connected to the corners of one longitudinal side element of the lower section by bolted connections. 6. The mast according to claim 5, characterized in that for each shoe the bolted connections of one plate are alternated with the bolted connections of the other plate, while for each bolted connection to the plate in the zone of its location on the shelf with the hole of each of the mates in the location zone the corner plates are placed on the inner side along the edge of the shelf a hard stop in contact with the inner surface of the edge parallel to the axis of the bolt connection of the mating shelf of the adjacent corner. 7. The mast according to claim 1, or 4, or 6, characterized in that the hard stop is made in the form of a welded steel element. 8. The mast according to claim 1, or 4, or 6, characterized in that the hard stop is made in the form of a segment of a bar. 9. A mast according to any one of claims 1 to 6, characterized in that the set of structural elements of each truss connecting the longitudinal side elements in the form of steel corners, is made in the form of a series of consecutive parallel transverse steel elements welded to the ends with steel corners, and in each section between all transverse steel elements of pairs of welded steel half bevels passing from the joints of one transverse steel element with steel corners to the middle of the next transverse with solid element in the direction corresponding to the direction from the upper section to the lower. 10. A mast according to any one of claims 1 to 6, characterized in that the sections are made with a cross-section in the shape of a square, and the longitudinal side elements of the trusses are equal-angle steel corners. 11. The mast according to any one of claims 1 to 6, characterized in that it is provided with a support platform mounted on top of the upper section, a ladder fixed inside the cavities of the sections to enable it to climb to the support platform, and at least one rest area installed inside the cavity of the sections.