RU2423582C1 - Unit to connect tubes - Google Patents

Abstract

FIELD: construction. ^ SUBSTANCE: unit to connect tubes comprises cast-in and connecting elements equipped with holes for fastening elements. The unit is formed with bearing elements of frame structures combined to each other by means of joint plates using a prefabricated cast-in insert. The insert ensures fixation of joint plates on walls of connected tubes with the help of friction bolt joints without access to their nuts. Nuts are fixed in the prefabricated cast-in insert and are installed in it with the possibility of pressing to inner walls of a tube using washers and a friction pad installed in the insert. The insert is installed in each of joined tubes. The insert is equipped with a wooden bar with through transverse holes and expanded holes at the opposite sides of the bar, where nuts are coaxially fixed, and washers are installed. Washers are closed on the bar with friction pads, in which there are holes for bolts arranged coaxially to holes in the bar. ^ EFFECT: reduced labour expenditures in manufacturing and assembly and increased bearing capacity of a unit. ^ 2 cl, 8 dwg

Description

The invention relates to the field of construction and can be used in the construction of buildings with a metal frame of the frame type, the supporting structures of which are closed section elements, including from cold-rolled sheet steel.

Known assembly comprising a connecting C-shaped element. The known site is equipped with ribs, a finger and a clamping screw, and the ribs are made on the shelves of a C-shaped element having holes in which a finger is provided with a threaded hole for installing a clamping screw (Patent RU No. 2013503, C1, priority date 10.26.1990, date Publications 05/30/1994, authors Paolo Kaoduro [IT], Carlo Kaoduro [IT]).

The disadvantage of the analogue is the high complexity of manufacturing the C-shaped element and its components, as well as the complexity of installation with limited access to the fastener elements due to the need to tighten the bolt connection. In addition, the known site is characterized by increased metal consumption and is significantly susceptible to corrosion.

As a prototype, a tubular profile joining unit formed by belts and braces of a trihedral truss, interconnected by connecting elements, and equipped with an insert installed in the belt, the belt is made of a pentagonal section shape, and the braces are of a rectangular box section, the connecting element is made fiberglass of rectangular cross section with a thickened wall at the base, with transverse holes in the base for bolted connections and with beveled ends under the installed ra the braid, the connecting element is fastened to the thread with a bolt on the inclined wall of the belt and in the insert of a five-sided section installed therein, provided with threaded holes that fit into the holes made in the connecting elements and in the inclined wall of the belt, and each brace is fixed to the connecting element by means of bolt compounds (Patent No. 2373344, C1, priority date 08/13/2008, publication date 11/20/2009, authors Endzhievsky L.V. et al., RU, prototype).

The disadvantage of the prototype is the high labor costs during installation, due to the complexity of installing the insert in the closed section profile and its docking with the profile holes for installing bolted joints.

The objective of the invention is to reduce labor costs in the manufacture and installation and increase the bearing capacity of the node through the use of cheap and easy to process materials and the use of friction joints.

To solve the problem, the tubular profile connection unit, comprising mortgages and connecting elements provided with holes for fasteners, according to the invention, is formed by load-bearing elements of frame structures, interconnected by fittings using a prefabricated embedded insert that secures the shapes on the walls of the connected profiles using friction bolt connections without access to their nuts, which are fixed in the prefabricated embedded insert and installed in it with the possibility of compression to the inner walls of the profile using washers and a friction lining installed in the aforementioned insert, while the prefabricated embedded insert is installed in each of the joined profiles and is equipped with a wooden beam with through transverse holes and widened holes on opposite sides of the beam, in which the said nuts and washers are installed, closed on the beam with friction linings, in which holes for bolts are made coaxially with the holes in the beam.

According to the invention, a tubular profile joint can be formed using additional bolted joints located in a row with said friction joints.

Figure 1 shows the connection node of the tubular profiles, General view; figure 2 - prefabricated embedded insert, General view; figure 3 - assembly diagram of a prefabricated embedded insert; figure 4 - wooden beam precast embedded insert, top view; figure 5 - assembly diagram of the node connecting tubular profiles; Fig.6 is a diagram of the assembly of a prefabricated embedded insert with holes for additional bolted connections; Fig.7 is a wooden beam precast embedded insert with holes for additional bolted connections, top view; on Fig - assembly diagram of the connection node of the tubular profiles using additional bolted connections.

The connection node of the tubular profiles is formed by load-bearing elements 1, interconnected by gussets 2 using a prefabricated embedded insert 3, which makes it possible to frictionally connect the gussets to the walls of the profiles with high-strength bolts 4 without access to their nuts (Fig. 1, Fig. 5).

The prefabricated embedded insert 3 contains a wooden beam 5 (FIG. 3, FIG. 4), in which the holes 6 are made for the width of the bolts 4, provided on both sides of the beam with extensions 7 and 8 (FIG. 4). The nuts 9 are pressed into the widened holes 7 by any known method, and the washers 10 are mounted in the holes 8, which are held by the cover 11 with the holes for bolts 4 made therein, attached to the wooden beam 5 by fasteners 12 (Fig. 3).

Prefabricated embedded inserts 3 are installed inside the connected elements 1, which ensures a fixed position of the nuts 9 in front of each hole of the bolted connection (Fig. 5). The connection of the gussets 2 with the walls of the profiles 1 is made by a friction bolt connection formed by high-strength bolts 4, which pull the pressed nuts 9 from the wooden beam 5, pressing them through the washers 10 and the lining 11 to the inner surfaces of the walls of the profiles 1.

The connection node of the tubular profiles can be formed using additional bolts 13 (Fig. 8) in the friction connection, tightening the entire package of connected parts, thereby ensuring the joint operation of the connected profiles 1, gussets 2 and prefabricated embedded insert 3, which increases the rigidity and stability of the nodal connections. For this, in a wooden beam 5 of a prefabricated embedded insert, broadening 7 and 8 are made through one hole (Fig.6, Fig.7). In the holes 6, made without the mentioned broadening, additional bolts 13 are installed (Fig. 8).

The advantage of the claimed compounds compared to the prototype is to reduce the cost and complexity when installing nodal connections of elements of a closed type of section, as well as to increase the bearing capacity of the node due to the following factors:

- the use of available materials for the manufacture of auxiliary elements (inserts), which reduces the cost of construction;

- the use of inserts of a simpler geometric shape, which allows to simplify their manufacture;

- the property of the crushing of wood provides the normative position of the nuts in the bolted connection;

- the use of the lining, which performs the function of the “cover” of the pressed-in hardware package in the prefabricated embedded insert, increases the friction surface of the friction bolt joint.

Claims (2)

1. The connection node of the tubular profiles containing embedded and connecting elements provided with holes for fasteners, characterized in that it is formed by load-bearing elements of frame structures, interconnected by shapes using a prefabricated embedded insert that secures the shapes on the walls of the connected profiles using friction bolted joints without access to their nuts, which are fixed in the prefabricated embedded insert and installed in it with the possibility of pressing against the inner walls profile using washers and a friction lining installed in the aforementioned insert, while the prefabricated embedded insert is installed in each of the joined profiles and is equipped with a wooden beam with through transverse holes and widened holes on the opposite sides of the beam, in which the said nuts are coaxially fixed and the washers closed on the bar, friction linings in which bolt holes are made coaxially with the holes in the bar. 2. The connection node of the tubular profiles according to claim 1, characterized in that it is equipped with additional bolted joints located in a row with the friction joints.

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