RU2084747C1 - Quick-detachable joint for connecting pipe lines - Google Patents

Abstract

FIELD: fuel injection equipment of automobile engines. SUBSTANCE: device has bell mouth of connector with seat for introducing the calibrated end of pipe line, pipe union for hose, second seat with increased diameter as compared with first one where sealing ring and bearing ring are mounted. Two shaped through slots which used to receive restrictive clamp are made at some distance from edge of bell mouth perpendicularly to its axis. Clamp is made in the form of spring member having U-shaped form in plan. Side tabs are made in the form of segments whose radii are directed inside copying the profile of bell mouth edges. At side view, restrictive clamp has L-shaped form where radius portion of clamp is bent through angle of 90 deg. EFFECT: enhanced reliability. 4 dwg

Description

 The inventive quick disconnect device for connecting pipelines, hereinafter referred to as a quick disconnect connection or connection, relates to the field of automotive, in particular to a fuel supply system of a car.

 A known design for the quick connection of pipelines [1] which describes a plug-in device for connecting pipelines, consisting of a plug with a rigidly connected hose, a retaining hose and a retaining flange, a socket with a conical section on the inserted hose into the plug, a retaining hook located behind the bell, O- shaped sealing ring. The disadvantages of this design include the need to maintain a tight tolerance on the size of the conical portions of the plug and socket, which leads to a complication of manufacturing technology, as well as the need to use a special device to disconnect this connection.

 Another design [2] contains a housing with a socket for entering the end of the tube having an annular collar, a first pipe, a second pipe, a sealing ring located inside the profile hole of the socket, a blocking element that includes a device for holding the inserted pipe into the socket, a pair of elastic spring elements and a rotating tubular clamp. The disadvantage of this design is the relatively large number of parts used in the connection (9 children), which leads to an increase in the complexity, material consumption in the manufacture and, as a result, to a high cost of the connection, as well as increased dimensions of the connection due to the presence of spring elements located perpendicular to the input into the socket of the body of the handset.

 The disadvantages indicated in the above constructions are partially eliminated in the invention [3] selected as a prototype. This connection includes a connector housing, an annular seal, a tubular retaining clip in the housing, a clamp holding device in the housing, a retaining cap necessary to disconnect the tube from the housing and the two tubular sections.

 The disadvantage of this design is that it is difficult to manufacture, due to the complex configuration, of the tubular retaining clamp part, which requires strict tolerances and the use of high-quality spring steels (steel sheets), as well as the presence of the cap retaining part necessary only to disconnect this connection, which leads to a relative high cost of joint design.

 The objective of the invention is to reduce the number of parts in the connection, reducing the complexity of the assembly node, taking into account all the requirements for the joints used in the automotive industry.

 The technical result is achieved in that in a quick-disconnect device for connecting pipelines containing a socket with a socket for entering the end of the pipeline, having a ring shoulder at a distance from the edge of the pipe, an annular seal installed in the socket for radial sealing of the pipe with the socket, a support ring that is inserted into a bell of the pipe horses and a clamp in the bell, the named clamp is located in opposite grooves of the bell, made perpendicular to and a socket and having a section in this direction in the form of two segments facing with radii to the axis of the socket, the clamp having a U-shape repeats the configuration of the grooves in the perpendicular direction to the axis of the socket, and in the parallel direction with the axis of the socket, and in parallel direction with the axis of the socket, the edges of the grooves farthest from the end of the socket are made obliquely to the axis of the socket.

In FIG. 1 shows the inventive quick coupling, in FIG. 2 and 3
sectional view of the quick coupler, in FIG. 4 incoming parts of this node.

 The quick disconnect device for connecting the piping of FIG. 1, 2, 3 and 4 consists of a socket 1, a first socket 2 for introducing a calibrated end of the pipe, a hose fitting 3, a second socket 4 with an increased diameter relative to the first socket, in which the sealing ring 5 and the support ring 6 are mounted. from the edge of the bell 1 there are two, perpendicular to the axis of the bell, curly through grooves 7, in which the restraining clip 8 is located. Moreover, in the cross section perpendicular to the axis of the bell, the grooves are in the form of segments facing with radii inside the bell and form curly cr pits 9 on the walls of the socket 1, and in section parallel to the axis of the socket, the grooves are inclined one, from which corner edge 10 in the direction of motion of the end of the pipeline with the introduction of the latter in the bell. The restraining clamp 8 located in the grooves 7 of the socket 1 is a spring element having a U-shape in plan, the side antennae being configured in the form of segments 11 with radii facing inward and repeating the profile edges 9 of the socket 1, and when viewed from the side, the restraining clip has L-shaped, where the radius part 12 of the clamp 8 is bent at an angle of 90 degrees.

 The principle of operation of the quick disconnect device is as follows. The calibrated end of the pipeline with an annular collar at a certain distance from the end of the pipeline is axially introduced into the socket 1, into the second socket 4 and then into the first socket 2. The annular collar of the introduced pipeline, having a diameter larger than the size between the segment parts 11 of the retaining clip 8 , when an axial force is applied when the tube is inserted, it pushes the retaining clip in the same direction. Due to the inclined edge 10 in the bell 1, the clamp tendrils radially move in the direction of the restraining clamp. Due to the inclined edge 10 in the socket 1, the clamp tendrils make a radial movement in the direction from the axis of the socket (expand) until the annular collar of the pipeline passes. After the annular collar passes, the clamp tendrils, the retaining clamp tendrils return to their original state, preventing the reverse movement of the pipeline. The connection is operational. In order to withdraw the pipeline from the socket (to disconnect the connection), it is necessary to apply a force perpendicular to the axis of the socket to the radius part 12 of the clamp 8, the clamp will move perpendicular to the axis of the socket (in the direction of application of force), while due to the edges 9 and the segment part 11 the antennae will extend apart (make a radial movement from the axis of the socket) and eventually free up the passage for the annular collar of the pipeline, after which the end of the pipeline will be withdrawn from the socket by axial movement 1 la. When the force is removed, the clamp made of spring material returns to its original state.

 Thus, the inventive quick-disconnect device for connecting pipelines, consisting of the minimum required number of parts that can be manufactured on universal equipment with acceptable tolerances using simple equipment for mass production of the connection, the design of which allows minimizing the complexity of manufacturing and assembling the connection, provides fast and reliable piping connection without any tools.

A possible application of the above-described quick disconnect device is application in a vehicle structure, in particular in a fuel supply system (fuel lines and steam lines) assembled in a conveyor environment, i.e. mass production The claimed compound fulfills the basic requirements of mass production:
relatively low cost of connection;
reliability of fixation of the pipeline;
quick and easy assembly of pipelines.

 The latter circumstance also leads to a reduction in time for servicing and repairing a car.

Claims (1)

 A quick disconnect device for connecting pipelines, comprising a socket with a socket for entering the end of the pipeline, having an annular collar at a distance from the edge of the pipeline, an annular seal installed in the socket for radial sealing of the pipeline with the socket, a support ring that holds the end of the pipe inserted into the socket and a clip in the socket characterized in that the clamp is located in opposite grooves of the socket, made perpendicular to the axis of the socket and having in this direction the cross section in the form of two segments facing radii to the axis of the socket, the clamp having a U-shape repeats the configuration of the grooves in the perpendicular direction to the axis of the socket, and in the parallel direction with the axis of the socket, the edges of the grooves distant from the end of the socket are made obliquely to the axis of the bell.

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