SU883587A1 - Method of connecting parts - Google Patents

Description

The invention relates to mechanical engineering, and in particular to a method for connecting parts and can be used for permanent tight connection of pipelines and other structural elements.

A known method of connecting pipelines using a sleeve with an inner annular protrusions, which consists in the fact that when connecting the ends of the pipes, the sleeve is crimped ¹ radially inward when screwing the connection elements with wrenches. The annular protrusions on the sleeve not only cut into the pipe body, but also deform it in the zone of the protrusions, forming an integral connection fij.

The disadvantages of this method of connection is that it does not provide the connection of pipes with different diameters from various materials and cannot be used in hard-to-reach places of construction.

There is also a known method of connecting parts, for example, pipelines, which consists in installing a coupling made of a material with memory with radial protrusions from the outside to the joint and deformation of the protrusions mechanically [2].

However, the known method does not provide an extension of the range of diameters of the connected parts.

The purpose of the invention is the expansion of the range of diameters of the connected parts.

This goal is achieved by the fact that in the joint zone a clutch is installed with protrusions on both sides and the deformation of its protrusions is carried out by heating the clutch.

In FIG. 1-3 presents a sequence of operations according to the proposed method; in FIG. 4 is a diagram of the distribution of deformations along the length of the coupling.

The proposed connection method is as follows.

The coupling I, whose inner diameter is 4-6% less than the diameter of the pipe 2 and the outer 3 ~ 4% more than the inner diameter of the housing 3, is subjected to deflation of distribution on the internal protrusions by 6-10% and compression on the external protrusions by 4 ~ 6% at temperature below the martensitic transformation temperature of the alloy.

The deformed sleeve 1 is put on the pipe 2 and inserted into the housing 3. I

With the supply of heat from the environment, the coupling restores its geometrical dimensions and, with its annular protrusions, penetrates into the bodies of the parts being joined, forming an integral tight seal.

The application of the invention allows to ensure the connection of parts with different diameters without the use of transition elements and thereby increase reliability and reduce the weight of the joints.

Claims (2)

The invention relates to mechanical engineering, in particular to a method of joining parts and can be used for permanently sealed joining of pipelines and other structural elements. A known method of connecting pipelines with a sleeve with internal annular projections, which consists in the fact that when the ends of the pipes are connected, the sleeve is crimped radially inward while screwing the connection elements with wrenches. The annular protrusions on the sleeve not only cut into the body of the pipe, but also deform it in the area of the protrusions, forming a one-piece connection. The disadvantages of this connection method are that it does not connect pipes with different diameters of different materials and cannot be used in difficult to reach ground construction. There is also known a method of joining parts, such as pipelines, consisting in installing a coupling of a memory material with radial protrusions from the outside to the joint zone and deformation of the protrusions by mechanical means f23. However, the known method does not expand the range of diameters of the parts to be joined. The purpose of the invention is to expand the range of diameters of the parts to be joined. This goal is achieved by installing a coupling with protrusions on both sides in the joint zone and deformation of its protrusions due to the heating of the coupling. FIG. 1-3 shows the sequence of operations for the proposed method; in fig. 4 is a plot of strain distribution along a sleeve length. The proposed connection method is as follows. 3 Coupling 1, the inner diameter of which is 4-6% smaller than the diameter of pipe 2 and the outer diameter is 3-4% larger than the internal diameter of the housing 3, is subjected to deflection on the inner projections by 6-10% and compression on the outer projections by 4- 6% at a temperature below the martensitic temperature of the pre-t rotation of the alloy. The deformed sleeve 1 is put on the pipe 2 and inserted into the body 3. With the heat supplied from the environment, the sleeve restores the geometric dimensions and with its annular projections penetrates into the bodies of the parts to be connected, forming a permanent joint. The application of the present invention will allow the connection of parts with different diameters without the use of transition elements and thereby increase the reliability and reduce the weight of the connections. The invention of the method of joining parts, such as pipelines, consists in installing a coupling of a memory material with radial protrusions from the outside to the joint zone and deformation of the protrusions by mechanical means, which is the fact that, in order to expand the range of diameters of the connected parts, in the joint zone install the clutch with protrusions on both sides and the deformation of its protrusions is carried out by heating the clutch. Sources of information taken into account in the examination 1. UK Patent No. 1408725, F 26, 1969. 2. US patent number 3158388, cl. 285-90, 1964 (prototype). 1 FIG. 2 FIG. J Fy