RU188711U1 - KNOT OF CONNECTION OF METAL PIPES OF RECTANGULAR SECTION - Google Patents

Abstract

The utility model relates to methods of connecting metal pipes of rectangular cross section and can be used in easily transformable structures, for example, in furniture production. The technical result of the proposed utility model is to obtain a tight connection between two pipes. Inset pipe 1 is fitted with an insert 3, into slot 8 of which is inserted nut 4 (the socket prevents the nut 4 from turning). The axis of symmetry of the nut is aligned with the axis of symmetry of the hole on the pipe 1. After that, the pipe 1 is inserted into the pipe 2, aligning the hole on the pipe 1 with the hole on the pipe 2. Then tighten the screw 5, which tightens the nut 4 and tightens the nut 7 the wall 6 of the uncompressed pipe 2, thereby compressing the profile of the pipe 1 is moved apart, choosing a gap in the joint. The unit is ready for operation. Disassembly of the connection unit is performed in the reverse order.

Description

The invention relates to the joints of metal pipes of rectangular cross section and can be used in easily transformable structures, for example, in furniture production.

A well-known pipe connection assembly, comprising a metal connector with holes, including lining with a longitudinal line of the connector, covering the outer surface of the pipes to be connected on opposite sides, with end sections of which the connector elements are non-detachably fastened, and detachable fasteners passed through the holes, with an additional with an additional line of the connector with the formation of two additional linings, while the holes are made in each strip along its pr longitudinal axis, and with the end portions of tubes rigidly attached threaded elements (see. Patent RU №200148, cl. H02G 3/06, 1993).

The disadvantage of this connection node is a large number of fastened parts extending beyond the surface of the pipes being fastened, which is practically not permissible in a transformable, for example, furniture production.

The closest analogue to the technical nature of the proposed site is the connection of metal pipes, where one end of the pipe is crimped with core punches (so that it is inserted into the uncompressed), into which a connector with two sockets is inserted, in which two nuts are inserted with the exception of turning. In the places of joint arrangement of pipes, holes for threaded fasteners are made coaxially (see RU Patent No. 173233, class H02G 3/06, 2017).

The disadvantage of this node is the play in the connection.

The technical result of the proposed utility model is to obtain a more dense connection.

The technical result is achieved by the fact that in the joint assembly of metal pipes of rectangular section consisting of two ends of pipes being joined, one of which is crimped by shaped punches, so that with a minimum gap was inserted into the end of the uncompressed pipe, the insert was pre-installed into the compressed pipe the socket of which, with the exception of turning, was inserted a nut, in the place of joint arrangement of pipes, a hole was made for a threaded fastener ensuring fixation of the connection, axis symmette When the hole is made coinciding with the axis of symmetry of the nut installed in the insert, the geometry of the crimped profile is made so that when the threaded connection is tightened, the internal profile expands in the horizontal and vertical directions before selecting gaps in the connection.

The proposed unit for connecting metal pipes of rectangular section is shown in the drawings in the unstressed position, where in FIG. 1 shows the connection node - appearance; in fig. 2 shows section A-A of FIG. one; in fig. 3 section BB — in FIG. 2

Position 1 shows the end of the crimped pipe, position 2 shows the end of the non-compressed pipe, position 3 shows an insert, in socket 8 of which, with the exception of twisting, there is a nut 4. In the places where pipes 1 and 2 are co-located, holes are made for a threaded fastener 5, which can screw or bolt.

The node connecting the metal pipes of rectangular section is assembled as follows.

An insert 3 is inserted into the crimped pipe 1, into the socket 8 of which a nut 4 is inserted (the socket prevents the nut 4 from turning). The axis of symmetry of the nut is aligned with the axis of symmetry of the hole in the crimped profile 1. After that, the pipe 1 is inserted into the pipe 2, combining the hole in the pipe 1 with the hole in the pipe 2. Then tighten the screw 5, which tightens the wall 7 of the compressed profile 1 and the wall 6 uncompressed pipe 2, thereby the profile 7 is moved apart, choosing a gap in the joint. The node is ready for operation.

Disassembly of the connection unit is performed in the reverse order.

For reliable operation of the unit, the minimum clearance between pipes 1 and 2 should be within 0.1 ... 1.0 mm.

Getting a more dense connection of pipes, is the advantage and advantage of the proposed technical solution compared with the prototype.

Claims (1)

An assembly of metal pipes of rectangular section consisting of two ends of pipes to be joined, one of which is crimped by core punches so that with a minimum gap was inserted into the end of the non-compressed pipe, an insert is pre-installed in the pressed pipe, with the exception of rotation, a nut is inserted , in the place of joint arrangement of pipes, a hole is made for a threaded fastener ensuring fixation of the connection, the axis of symmetry of the hole is made coinciding with the axis of symmetry of the nut, installed in the insert, characterized in that the geometry of the compressed profile is made in such a way that when the threaded connection is tightened, the internal profile expands in the horizontal and vertical directions before selecting gaps in the connection.

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