RU2761848C1 - Fixing assembly for thin walled pipe in the case - Google Patents

Abstract

FIELD: pipes fastening.SUBSTANCE: invention relates to the field of fastening pipes in the grooves of various bodies. This is done by pressing the pipe against the casing groove on both sides, on the one hand with an annular protrusion - the pipe collar, and on the other hand by the bent wall of the end part of the pipe, in the absence of pipe deformation, as well as due to the presence of an O-ring and a sleeve. Straightening the bent wall of the end part of the pipe makes it possible to disassemble the attachment point for the thin-walled pipe in the body.EFFECT: creation of an attachment point for a thin-walled pipe in a housing that has increased reliability, tightness and versatility.7 cl, 3 dwg

Description

The invention relates to the field of fastening pipes in holes, namely, to the attachment points for thin-walled pipes in the body, and can be used for hermetic fastening of thin-walled pipes in the bodies of modern combined fuel inlets, where a level sensor in the tube is installed on one body, as well as intake and drain pipes for the engine and other consumers, pressure and vacuum relief valves.

Methods of fastening thin-walled tubes in through bores of heat exchanger grids are known from the prior art. Soldering and welding of thin-walled tubes to the body is not possible due to the difference in materials between the tubes and the body.

Closest to the claimed invention is the assembly for fastening a thin-walled pipe in the body, described in Russian patent No. 2316405 and containing a tube sheet body and a thin-walled pipe, which has an annular protrusion - a shoulder on the outer surface. The connection of the pipe to the body is carried out by deforming the pipe and body using a press washer. This attachment point is selected as a prototype of the claimed invention.

The disadvantages of the prototype are, firstly, in the low reliability of fastening, since pressing the pipe and body using a press washer leads to deformation and, consequently, to a decrease in the strength of the tube at the attachment point, as a result of which the tube breaks during operation; and, secondly, in insufficient tightness and versatility, since the pressing method does not provide a high tightness of the fastening and the possibility of fastening the tube and body made of different materials, for example, metal and plastic or from different metals. The use of the prototype design in blind and blind body grooves is technically not possible.

The technical result of the invention is the creation of an attachment point for a thin-walled pipe in a casing with increased reliability, tightness and versatility, due to pressing the pipe against the groove of the casing from both sides, on the one hand with an annular protrusion - a pipe collar, and on the other side with a bent wall of the end part of the pipe, when this lack of deformation of the pipe, as well as due to the presence of an O-ring and a sleeve. Straightening the bent wall of the end part of the pipe makes it possible to disassemble the attachment point for the thin-walled pipe in the body.

The stated technical result was achieved by creating a fastening unit for a thin-walled pipe in a body, containing a thin-walled pipe inserted into a groove in the body, as well as an O-ring and a sleeve, which are put on the pipe and placed in the bore in the body groove, and the pipe has an annular protrusion - a shoulder on the outer surface, which is pressed against the sleeve, which is pressed against the sealing ring, which is pressed against the tube, and the end of the groove is expanded to form a cavity inside the body, while the end part of the pipe is located inside the cavity, and the wall of the end part of the pipe is bent and pressed against the wall of the cavity.

In a preferred embodiment of the assembly, the tube, body bore, and O-ring are cylindrical in shape.

In a preferred embodiment of the annular protrusion-collar assembly on the outer surface of the pipe, it is made in the form of a toroidal ridge.

In a preferred embodiment of the assembly, the bore in the body bore and the sleeve are tapered, whereby the sleeve compresses the pipe in diameter and presses the O-ring against the pipe along a tapered slope.

In a preferred embodiment of the assembly, the O-ring is made of an elastic material selected from a set of materials containing rubber and silicone.

In a preferred embodiment, the assembly comprises a pressure washer fitted to the pipe and pressed between the collar and the sleeve.

In a preferred embodiment of the collar-collar assembly, it is notched.

For a better understanding of the claimed invention, the following is its detailed description with the corresponding graphic materials.

FIG. 1. A unit for fastening a thin-walled pipe in a housing, made according to the invention.

FIG. 2. A fragment of the attachment point for a thin-walled pipe in the housing, made according to the invention.

FIG. 3. A unit for fastening a thin-walled pipe in a casing with a pressure washer, made according to the invention.

Elements:

1 - pipe;

2 - case;

3 - a sealing ring;

4 - bushing;

5 - annular ledge - shoulder;

6 - cavity inside the body;

7 - wall of the end part of the pipe;

8 - hold-down washer.

Consider in more detail the claimed invention (Fig. 1 - 3).

The claimed attachment point for a thin-walled pipe in the body contains a thin-walled pipe 1 inserted into the grooves in the body 2, as well as an O-ring 3 and a sleeve 4, which are put on the pipe 1 and placed in the bore in the body groove. Pipe 1 has an annular protrusion - collar 5 on the outer surface, which is pressed against the bushing 4. The bushing 4 is pressed against the O-ring 3. The O-ring 3 is pressed against the tube 1. The end of the groove of the body 2 is expanded to form a cavity 6 inside the body 2. The end of the pipe 1 is located inside the cavity 6. The wall 7 of the end part of the pipe 1 is bent and pressed against the wall of the cavity 6.

The pipe 1, the groove in the body 2 and the O-ring 3 have a cylindrical shape.

The annular ledge - collar 5 on the outer surface of the pipe is made in the form of a toroidal ridge.

The bore in the groove of the body 2 and the sleeve 4 are tapered. The bushing 4 compresses the pipe 1 in diameter and presses the O-ring 3 to the pipe 1 along a tapered slope.

The sealing ring 3 is made of rubber and has protrusions (Fig. 4).

The annular ledge - collar 5 has notches.

The unit can also contain a pressure washer 8, put on the pipe 1 and pressed between the annular protrusion - collar 5 and the sleeve 4.

The claimed assembly for fixing a thin-walled pipe in the body has the following advantages.

Increased reliability due to pressing the pipe 1 to the groove of the body 2 from two sides: on the one hand with an annular protrusion - the collar 5 of the pipe 1, and on the other side by the bent wall 7 of the end part of the pipe 1. With this pressing of the pipe on both sides, there is no deformation of the pipe in place pipe entry into the groove of body 2, therefore, during operation, the pipe does not break at this point.

Increased reliability and tightness due to the use of a rubber sealing ring 3 in combination with pressing the pipe 1 to the groove of the body 2 from two sides: on the one hand, by the annular protrusion - the collar 5 of the pipe 1, and on the other side by the bent wall 7 of the end part of the pipe 1. With this pressing the pipe 1 from both sides, the pipe 1 is more securely fixed in the groove of the body than when pressing the pipe 1 only from the side of the annular protrusion - the collar 5 of the pipe 1. In addition, such pressing of the pipe 1 from both sides ensures a better fit of the sealing ring 3 to the walls of the body 2 and pipe 1, due to better and stable pressing of the annular ledge - collar 5 to the sleeve 4 and the rubber sealing ring 3.

Although the above-described embodiment of the claimed invention has been set forth for the purpose of illustrating the claimed invention, it will be clear to those skilled in the art that various modifications, additions and substitutions are possible without departing from the scope and spirit of the claimed invention as disclosed in the appended claims.

Claims (7)

1. An attachment point for a thin-walled pipe in the body, containing a thin-walled pipe inserted into the groove in the body, as well as an O-ring and a sleeve, which are put on the pipe and placed in the bore in the body groove, and the pipe has an annular protrusion - a collar - on the outer surface, which is pressed against the sleeve, which is pressed against the sealing ring, which is pressed against the tube, and the end of the groove is expanded to form a cavity inside the body, while the end of the tube is located inside the cavity, and the wall of the end of the tube is bent and pressed against the wall of the cavity. 2. The assembly according to claim 1, characterized in that the pipe, the grooves in the body and the sealing ring have a cylindrical shape. 3. The assembly according to claim 1, characterized in that the annular protrusion - the shoulder - on the outer surface of the pipe is made in the form of a toroidal ridge. 4. The assembly according to claim 1, characterized in that the bore in the body groove and the bushing have a tapered shape, while the bushing compresses the pipe in diameter and presses the sealing ring to the pipe along a tapered slope. 5. The assembly of claim. 1, characterized in that the sealing ring is made of an elastic material selected from a set of materials containing rubber and silicone. 6. The assembly of claim. 1, characterized in that it contains a pressure washer, put on the pipe and pressed between the annular ledge - collar - and the sleeve. 7. The assembly according to claim 1, characterized in that the annular protrusion - the shoulder - has notches.

Images