RU199556U1 - UNIT OF CONNECTION OF ELEMENTS OF TUBULAR SCAFFOLDING - Google Patents

Abstract

Usage: In mechanical engineering for use in joints of tubular racks used in construction. Creature: The utility model contains connectable support pipes, forming a prefabricated vertical support, and a connecting sleeve that ensures the coaxial arrangement of the pipes to be connected, the first flange is welded to the end of the first support pipe, the connecting sleeve made in the form of a short pipe segment with a second flange welded in the middle part of the connecting sleeve, and in the first flange there is a hole with a diameter D that satisfies the condition: D> D> D., where: D is the inner diameter of the support pipes, D is the outer diameter a connecting sleeve, while said sleeve with a second flange is fixed in the second support pipe by welding through a hole made in the lateral surface of said pipe, and when assembling the vertical post, the first support pipe is connected to the second through the free end of the connecting sleeve to ensure alignment of the first and second flanges and with mutual benefit by threading support pipes; the free end of the connecting sleeve is seamed. The technical result consists in simplifying the connection unit and increasing the reliability. 1 n. p. f-ly, 5 ill.

Description

The utility model relates to mechanical engineering and can be used in the joints of tubular racks used in construction.

Known node for connecting pipelines (RF patent for utility model No. 47482, IPC F16L, 15/00, published 27.08.2005), containing a sleeve with at least one inner conical surface and a connecting element made in the form of a sleeve with an outer conical surface corresponding to the inner surface of the sleeve, and the inner surface allowing it to be connected to the pipeline, while the outer diameter of the expanded end of the sleeve is greater than the inner diameter of the expanded end of the tapered surface of the sleeve made with an external and / or internal thread.

It is also known to connect tubular elements (RF patent for utility model No. 44794, IPC E24J, 13/04, published on March 26, 2004), which includes abutting metal pipes inserted telescopically into each other along tapered end surfaces, and the ends of metal The pipes are made with a taper α = 1.5-5 ° to the height of the joint H, equal to 0.2 ÷ 0.6 D of the pipe diameter, and an annular protrusion is made at the base of the cone of the inserted pipe.

The closest to the proposed device is the known pipe connection (RF patent for USSR inventor's certificate No. 1352146, IPC F16L, 13/04, published on November 15, 1977), containing a longitudinally cut bushing and a sealing element, while the bushing has internal collars at the ends, made at an angle with an inclination towards the joint, placed in the outer annular grooves of the pipes that correspond to them, as well as a power element covering the sleeve and pressure elements installed in the corresponding grooves of the power element with the possibility of interaction of the thrust collars on the pressure elements with the outer when tightening and the inner when dismantling by the end surfaces of the load-bearing element, forming a threaded connection with the end face of the sleeve, while the outer surface of the sleeve and the inner surface of the load-bearing element 9 are made conical.

The known devices are difficult in technical implementation, since they consist of a large number of parts of various configurations and have insufficient reliability.

The technical result, which consists in simplifying the device and increasing the reliability, is achieved in the joint of the elements of the tubular scaffolding, containing the connectable support pipes, forming a prefabricated vertical post, and the connecting sleeve, providing the coaxial arrangement of the pipes to be connected, by the fact that the first flange, the connecting sleeve is made in the form of a short piece of pipe with a second flange welded in the middle part of the connecting sleeve, and in the first flange there is a hole with a diameter D _{hole fl. 1} , satisfying the condition:

D _int.mp. > D _{outfl. 1} > D out _{. Tue} , where:

D _{internal tr.} - inner diameter of support pipes,

D _{ext. Tue} - outer diameter of the connecting sleeve,

wherein said sleeve with a second flange is fixed in the second support pipe by welding through a hole made in the lateral surface of said pipe, and when assembling the vertical post, the first support pipe is connected to the second through the free end of the connecting sleeve to ensure alignment of the first and second flanges and to the mutual centering the support pipes.

The indicated technical result is also achieved by the fact that the free end of the connecting sleeve is rolled up.

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

in fig. 1 a) the tubular support is shown in a disassembled state;

in fig. 1 b) shows the assembled support tubular stand;

in fig. 2 shows the supporting tubular stand in section;

in fig. 3 shows a plug-in sleeve without rolling from the end side;

in fig. 4 shows a plug-in sleeve with rolling from the end side;

in fig. 5a) shows the tubular support in a disassembled state in isometric view (option with the rolled end of the plug-in sleeve);

in fig. 5b) shows the tubular support in a disassembled state in isometric view (option without rolling the end of the insert sleeve);

in fig. 5c) is an isometric view of the assembled support tubular stand.

The node for connecting the elements of tubular scaffolding (Fig. 1 - Fig. 5) contains connectable support pipes 1 and 2, forming a prefabricated vertical post, and a connecting sleeve 3, which ensures the coaxial arrangement of the pipes to be connected.

At the end of the first support tube 1, the first flange 4 is welded.

The connecting sleeve 3 is made in the form of a short pipe segment with a second flange 5 welded in the middle of the connecting sleeve.

A hole is made in the first flange 4 (not shown in the drawings) with a diameter D of _{hole fl. 1} , satisfying the condition:

D _{internal tr.} > D _{outfl. 1} > D out _{. Tue} where:

D _{internal tr.} - inner diameter of support pipes 1 and 2,

D _{ext. Tue} - outer diameter of the connecting sleeve 4.

The connecting sleeve 3 with the second flange 5 is fixed in the second support pipe 2 by welding through the hole 6 made in the side surface of the said pipe.

When assembling the vertical post, the first support pipe 1 is connected to the second support pipe 2 through the free end of the connecting sleeve 3 to ensure alignment of the first 4 and second flanges 5 and with the mutual alignment of the support pipes 1 and 2.

FIG. 1, 2 and 5 also show figured flanges 7, welded to the support pipes 1 and 2 and intended for fixing horizontal girders (not shown in the drawings) during the installation of scaffolding.

The proposed joint of elements of tubular scaffolding functions as follows.

The first flange 5 is welded to the end of the first support pipe 1, in which a hole with a diameter D of _{hole fl.} 1 = 52 mm is made for more accurate alignment of support pipes 1 and 2 with each other and to establish possible distortions of the pipe axes and a more uniform distribution of the load.

The bushing 3 is made in the form of a pipe segment (Fig. 3, Fig. 5b) or in the form of a pipe segment with a rolled end (Fig. 4, Fig. 5a) with an outer diameter D out _{. Tue} = 51 mm. The second support flange is welded to the sleeve 3.

Then the sleeve 3 is inserted into the second support pipe 2 with an inner diameter D _inner.tr. and is welded to it through a hole 6 made in the lateral surface of said pipe.

The final operation when assembling the junction of the elements of tubular scaffolding is the joining of pipes 1 and 2 (Fig. 2 and Fig. 5c) until the convergence of the first 4 and second flanges 5

At the same time, due to the increase in the supporting surface, the specific load at the junction of pipes 1 and 2 decreases.

Flanges 4 and 5 prevent the pipe ends from jamming at the moments of the racks falling when dismantling the scaffolding. This improves the so-called "turnover" of the support legs during operation.

In the known technical solutions, joining the tubular struts of scaffoldings is a significant disadvantage that during operation, when the struts fall or skew, the concentration of the specific (point) load occurs, leading to jamming of the ends of the pipes and the impossibility of their reuse.

In the proposed utility model, this drawback is eliminated and a technical result is achieved, which consists in simplifying the device and increasing reliability.

The proposed device is simpler and more reliable in design.

The device does not contain complex parts, is manufactured at the applicant's enterprise and has passed production tests, showing high reliability.

Claims (6)

1. A node for connecting the elements of tubular scaffolding, containing connectable support pipes, forming a prefabricated vertical post, and a connecting sleeve that ensures the coaxial arrangement of the pipes to be connected, characterized in that the first flange is welded on the end of the first support pipe, the connecting sleeve is made in the form of a short pipe segment with a second flange welded in the middle part of the connecting sleeve, and in the first flange a hole is made with a diameter D _{hole fl. 1} , satisfying the condition: D _int.tp. > D _{outfl. 1} > D out _{. Tue} where: D _int.tp. - inner diameter of support pipes, D _{ext. Tue} - outer diameter of the connecting sleeve, wherein said sleeve with the second flange is fixed in the second support pipe by welding through a hole made in the lateral surface of the said pipe, and when assembling the vertical post, the first support pipe is connected to the second through the free end of the connecting sleeve to ensure alignment of the first and second flanges and with mutual centering the support pipes. 2. The node for connecting elements of tubular scaffolding according to claim 1, characterized in that the free end of the connecting sleeve is seamed.

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