RU2203446C2 - Junction adapter - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: junction adapter has male and female parts whose facing surfaces are provided with annular depressions, ring made of material possessing shape memory effect and inserted in male-part annular depression, and flexible snap ring. Ring made of material possessing shape memory effect is split, flexible snap ring is mounted around ring made of material possessing shape memory effect exerting initial radial pressure on the latter. Outer diameter of ring is smaller than or equal to diameter of outer side surface of male part and its outer surface on rear end in direction of assembly is beveled. Annular depression of female part accommodates additional split ring made of material possessing shape memory effect for reducing its diametric dimensions, shape recovery temperature being higher and stiffness greater than those of ring made of material possessing shape memory effect. Inner diameter of additional split ring made of material possessing shape memory effect is greater than inner diameter of female-part side surface. Proposed adapter provides for jointing and separating two parts without access to joint. EFFECT: facilitated junction and separation of two parts; provision for multiple reuse of adapter. 2 cl, 6 dwg

Description

 The invention relates to the field of engineering, in particular to connecting and disconnecting devices.

 A device for connecting pipes [1], containing a cylindrical body with placed in it sealing elements of a material with thermomechanical shape memory, made in the form of rings with a convex-concave part between the inner and outer side surfaces.

 The disadvantages of this device are: the presence of plastic deformation of the end sections of the pipes, which leads to a decrease in the inner diameter of the pipes at the junction, as well as the difficult installation of the rings due to their possible movement along the longitudinal axis of the pipes, and therefore the presence of some uncertainty about the places of plastic deformation of the body couplings and pipes, the inability to connect sufficiently thick-walled structures.

 The closest technical solution to the described invention is a device in which a method for connecting pipes [2] is implemented. The device contains female and male parts, on the mutually reversed surfaces of which coordinated ridges are made, moreover, an internal zig is made on the inner pipe and an external zig on the outer one, seals are placed in them, an additional element of an alloy having a shape memory made in at least one thin-walled rings, which during assembly of the compound are deformed in a cooled state and put on one pipe, placing it in a zig, after which it is repeatedly deformed in a cooled state and not devant second pipe aligning ridge followed by heating to alloy the operating temperature and connected pipes.

 The disadvantages of this connecting device are the inability to disconnect parts, the need for access to the pipe joint in the process of their connection, as well as the relatively complicated connection process due to the need to deform a thin-walled alloy ring having a shape memory, and the need for additional equipment (mandrel) for connecting parts .

 The technical problem solved by the proposed connecting device is to expand the scope of the connecting device and simplify its design.

Technical result:
- ensuring the connection and disconnection of the two parts without access to the junction,
- no need to use additional equipment for connecting and disconnecting parts,
- reusable,
- improving manufacturability.

 To solve this problem, a connecting device is proposed that contains female and male parts, on the mutually reversed surfaces of which matching annular recesses are made, a ring of material with a shape memory effect (EPF) installed in the annular cavity of the male part, made with the possibility of increasing its diametrical dimensions.

 New in this connecting device is that the ring of material with EPF is made split, a snap split elastic ring is installed coaxially outside the ring of material with EPF with initial radial pressure on it, and the outer diameter of the snap split elastic ring is less than or equal to the diameter of the outer side surface of the covered part, a chamfer is made on its outer surface from the side rear in the direction of assembly of the face, an additional set is installed in the annular recess of the female th split ring made of material with EPF with the possibility of reducing its diametrical dimensions, with a temperature of restoration of shape higher and with a stiffness greater than that of a ring of material with EPF placed in the annular recess of the covered part, the inner diameter of the additional split ring of material with an EPF larger than the diameter of the inner side surface of the female part. On the outer surface of the retaining split elastic ring, a chamfer can be made from the front side in the direction of assembly of the end face.

 The implementation of the rings of the material with an EPF split allows you to install them in the annular recesses of the covered and covering parts without additional equipment. The installation of a retaining split elastic ring coaxially on the outside of a ring of material with EPF makes it possible to more reliably connect two parts, since the strength of the joint is determined by the strength of the retaining split elastic ring. The installation of a retaining split elastic ring with an initial radial pressure on a ring of material with EPF installed in the annular recess of the covered part, and the outer diameter of the locking split elastic ring less than or equal to the diameter of the outer side surface of the covered part allows you to connect two parts without access to them, because before joining the parts, the retaining split elastic ring having an initial radial pressure is completely located in the annular recess of the male part. The execution of the retaining split elastic ring with a chamfer on its outer surface from the rear side in the direction of assembly of the end, as well as the installation in the annular recess of the female part of the additional split ring made of material with EPF with the possibility of reducing its diametrical dimensions, with a recovery temperature higher and with a stiffness greater than that of a ring of material with EPF placed in the annular recess of the covered part, the execution of the inner diameter of the additional split A ring made of a material with EPF larger than the diameter of the inner side surface of the female part allows separation of the parts without access to the joint.

 When a ring of material with an EPF installed in the annular recess of the covered part is heated to a temperature of restoration of shape, it changes its shape, increasing its diametric dimensions, abuts against the retaining split elastic ring, which partially leaves the annular recess of the covered part and enters the annular recess of the female parts and thus reliably connects both parts. When heating an additional split ring of material with EPF installed in the annular recess of the enclosing part, made with a stiffness greater than that of the ring of material with EPF placed in the annular recess of the covered part to a higher temperature of restoration of shape than the ring of material with an EPF placed in the annular recess of the covered part, it changes its shape, reducing its diametrical dimensions, abuts against a retaining split elastic ring, which partially leaves the annular the recesses of the female part and is included in the annular recess of the male part, deforming the ring of material with EPF, and thereby makes it possible to separate both parts.

 Changing the initial shape of the split rings made of a material with an EPF thermomechanically allows you to reuse the connecting device.

 The execution of the chamfer on the outer surface of the retaining split elastic ring from the front in the direction of assembly of the end allows the separation of parts in both directions.

The invention is illustrated by drawings:
figure 1 shows a General view of the connecting device before connecting parts;
figure 2 - split rings made of a material with EPF before exposure to temperature recovery form;
in FIG. 3 is a general view of a connecting device after connecting parts;
in FIG. 4 - split rings with EPF after exposure to the temperature of restoration of shape;
in FIG. 5 is a general view of the connecting device after the temperature of mold recovery on the additional split ring made of a material with an electron-phase transition;
in FIG. 6 is an embodiment of a connecting device prior to joining parts, in which a chamfer is made on the outer surface of the retaining split elastic ring from the front end in the direction of assembly of the end face.

 The connecting device contains two coaxially mounted parts: the female part 1, on the inner side surface of which an annular recess 2 is made, and the male part 3, on the outer side surface of which an annular recess 4 is made, coordinated with the annular recess 2. In the annular recess 4 of the male part 3 a split ring 5 made of a material with a shape memory effect (EPF) is installed. A lock split elastic ring 6 is mounted coaxially on the outside of the ring 5 of material with an EPF with initial radial pressure 6. The outer diameter 7 of the lock split elastic ring 6 in this case is made smaller than the diameter 8 of the outer side surface of the male part 3. On the outer surface of the lock split of the elastic ring 6 from the back side in the direction of assembly 9 of the end face 10, a chamfer 11 is made. In the annular recess 2 of the female part 1, an additional split ring 12 is installed, made of mater Ala with an EPF with the possibility of reducing its diametrical dimensions, with a temperature of restoration of a shape higher and with a stiffness greater than that of a ring 5 of material with an EPF placed in the annular recess of the covered part, the inner diameter 13 of an additional split ring 12 of material with an EPF larger than the diameter 14 of the inner side surface of the female part 1.

 To ensure separation of the parts in both directions, Fig. 6 shows an embodiment of a connecting device in which a chamfer 15 is made on the outer surface of the retaining split elastic ring 6 from the front of the front 16 of the assembly 9.

 The connecting device operates as follows. In the initial state, before connecting the parts 1 and 3, the retaining split elastic ring 6 is located in the annular recess 4 so that its outer diameter 7 does not protrude outside the diameter 8 of the outer side surface of the covered part 3, and an additional split ring 12 made of material with EPF is located in annular recess 2 in such a way that its inner diameter 13 does not protrude beyond the diameter 14 of the inner side surface of the female part 1. In this state, the male part 3 freely enters into melting part 1. When heating the split ring 5 from the material with EPF to the temperature of restoration of the form due to the heat source (internal or external, not shown), it changes its original shape to a wavy shape, as shown in figure 4, and resting against the tops of the waves into the retaining split elastic ring 6, expands it, increasing in diameter. When combining the annular recesses 2 and 4, the retaining split elastic ring 6 partially exits the annular recess 4 of the male part 3 and enters the annular recess 2 of the female part 1, thereby ensuring reliable connection of the parts 1 and 3.

 If necessary, the separation of one part from another is heated (due to a heat source, not shown), an additional split ring 12 of material with an EPF with a stiffness greater than that of a ring 5 of material with an EPF placed in the annular recess 4 of the covered part 3, to more high temperature of shape restoration (in comparison with the ring 5 from the material with EPF), it changes its shape to a wavy shape, as shown in figure 4, reducing its diametrical dimensions and abutting against the retaining split elastic ring 6, which partially exits um from the annular recess 2 of the female part 1 and includes an annular recess 4 in the male member 3, deforming the ring 5 from a material with shape memory. When the axial load is applied in the direction opposite to the assembly 9, to the male part 3, as the male part 3 moves, the outer diameter 7 of the retaining split elastic ring 6 is further reduced. By means of the interaction of the chamfer 11 with the edge of the annular recess 2 of the female part 1, the parts are disconnected 1 and 3 with the equality of the diameter 7 of the retaining split elastic ring 6 and the diameter 14 of the female part 1.

 When executing the connecting device with a chamfer 15 on the outer surface of the retaining split elastic ring 6 from the front front in the direction of assembly 9 of the end 16, it is possible to disconnect the parts in both directions.

 The choice of sizes of annular recesses, sizes of rings, as well as the materials from which they are made, is determined by calculation and experimental methods depending on the conditions and loads for which the connecting device is designed.

Using the proposed connecting device will allow:
- to ensure the connection and separation of the two parts without access to the junction;
- simplify the technology of connecting and disconnecting the two parts.

 - reuse the connecting device.

Sources of information
1. USSR author's certificate 1086282, IPC 4 F 16 L 13/14, publ. 04/15/84, BI 14.

 2. Copyright certificate of the USSR 1366759, IPC 4 F 16 L 13/14, publ. 01/15/88, BI 2.

Claims (2)

 1. A connecting device containing female and male parts, on the mutually reversed surfaces of which matched annular recesses are made, a ring of material with shape memory effect (EPF) installed in the annular recess of the male part, made with the possibility of increasing its diametrical dimensions, characterized in that a ring of material with an EPF is made split, a retaining split elastic ring is installed coaxially outside the ring of a material with an EPF with an initial radial pressure of it, and the outer diameter of the retaining split elastic ring is less than or equal to the diameter of the outer side surface of the covered part, a chamfer is made on its outer surface from the end face in the assembly direction, an additional split ring made of material with EPF is installed in the annular recess of the female part reducing its diametric dimensions, with a temperature of restoration of shape higher and with a stiffness greater than that of a ring of material with EPF placed in the rings m the recess of the male part, the inner diameter of the supplementary split ring of a material with shape memory larger than the diameter of the inner side surface of the female part.  2. The connecting device according to claim 1, characterized in that on the outer surface of the retaining split elastic ring a chamfer is made from the front end in the direction of assembly of the end face.

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