KR100535749B1 - Connecting element for liquid-conducting plug-in connections - Google Patents

Abstract

The present invention relates to a connector for a pluggable connector for guiding a fluid, the connector comprising a flexible hose connecting member formed by a connecting member (1) inserted into a connecting end of a flexible plastic hose (3). It consists of 1). The connecting body has a plug-in inclined surface 4 extending conically on its open end and is connected to a number of truncated conical extensions 6, 7 and also ring-shaped on the end of the insertion zone E. It is also connected to the stationary flange of which a conical taper 9 is connected on the rear side of the first truncated conical extension 6. A spherical groove 10 is provided between the expansion portion 6 and the taper portion 9. The sealing ring 11 having a round cross section is embedded in the groove. In order to facilitate positioning of the end of the flexible hose or tube on the connecting member, the outer surface M1 of the first truncated conical extension 6 has a hole angle α of about 45 ° relative to the outer surface of the shank 5. With a small gap a of the outer shell 14 of the sealing ring 11 while passing through the outer surface M2 of the next taper 9 to a significant extent of 20 ° to 30 ° relative to the outer surface of the shank 5. It has a low inclination angle β and abuts the shell 14 with respect to the posterior extension line.

Description

CONNECTING ELEMENT FOR LIQUID-CONDUCTING PLUG-IN CONNECTIONS}

The present invention relates to a connector for a pluggable connector for guiding a fluid, and more particularly to a tube or hose connection formed in a coupling member and inserted into a connection end of a tube or hose made of semi-flexible plastic. It is about a sieve.

(Prior Art)

Hose connections of this type typically have a cylindrical shank connected to its free end with a conically extended insertion slope and a plurality of truncated conical extensions provided thereon and a stop flange extending annularly at the end of its insertion zone. do. In such hose joints, the diameter of the shank is slightly larger than the inner diameter of the plastic tube, so that the plastic tube, which can be elastically widened, comes into close contact with the shank after insertion on the connector, and the truncated conical extension of the tube Somewhat buried in the inner wall (DE 44 13 346 C2).

In order to allow the tube to be better mounted on the connection, a conical taper is connected to the rear of the first truncated conical extension and an annular groove is provided between the extension and the taper and a sealing ring of circular cross section in the annular groove. This embedded pipe connection or hose connection is already actually used.

Further features of the present invention will become apparent from the following description of the embodiments shown in the appended drawings and the dependent claims of the claims. Among the accompanying drawings,

1 is a view showing a state before insertion of a coupling member in which a hose connection body is formed and a pressure medium hose attached thereto;

FIG. 2 is a view corresponding to FIG. 1 showing a state after inserting a hose onto a connection body; FIG.

3 is an enlarged longitudinal sectional view of the hose connecting body.

It is an object of the present invention to provide a connection with a truncated conical extension and a tapered portion in which a hose end or a tube end can be fitted via a sealing ring without any load being applied to the ring or damage caused by its sharp leading edge. To be configured.

Such an object is according to the invention in which the outer surface of the first truncated conical extension is opened at an angle α of about 45 ° with respect to the outer surface of the shank and passed with a slight spacing to the side of the shell of the sealing ring, while subsequent taper A negative outer surface is achieved by inclining at a significantly lower angle β about 20 ° to 30 ° relative to the outer surface of the shank and making contact with the shell of the sealing ring at its rear extension.

In addition, in another configuration of the invention, which is particularly advantageous for the insertion of the tube end or the hose end, the length of the shank zone up to the first extension is made to match the diameter of the shank. This realizes, on the one hand, optimal support of the cylindrical shank zone, and on the other hand, prevents fuel flowing through the plug connector from accessing the sealing ring, so that the sealing ring is formed by known corrosive fuel even after a long time. There is no fear of corrosion.

The tube or hose connection, indicated by reference numeral 2 in FIG. 1, is integrally coupled to the engagement member 1 of the plug connector, inserted into the connection end of the semi-flexible plastic pipe 3 and completely at the connection end thereof. It is formed to be connected while sealed. For that purpose, the connection body 2 has an insertion inclined surface 4 extending conically at its free end and a cylindrical shank 5 connected thereto and provided with a number of truncated conical extensions 6, 7, the insertion thereof It is terminated by a stop flange 8 which extends annularly at the end of the zone E.

To the rear of the truncated conical extension 6 a conical taper 9 is connected. In the transition part between the extension part 6 and the taper part 9, a groove 10 for storing and embedding the sealing ring 11 in a circular cross section is arranged, and the groove 10 is made of a rubber type material. It is preferred to be prepared.

The insertion inclined surface 4 is formed at its tip with a diameter F slightly larger than the inner diameter s of the plastic tube 3, so that the plastic tube 3 is connected to the connecting body 2 in the direction of the arrow P. When sandwiched in the phase, it is inevitably widened to the diameter S of the shank. The shank section 5 extending to the first extension 6 is very smooth, the length L of which approximately corresponds to the diameter S of the shank.

As can be seen from FIG. 3, the outer surface M1 of the truncated conical extension 6 is opened at an angle α of 40 ° or more, preferably 45 ° with respect to the outer surface of the shank 5 and the sealing ring ( It passes through the outer space 14 of 11) with a small space a. The extension 6 has a cylindrical flat zone 12 just in front of the groove 10, the diameter A of the flat zone 12 being slightly smaller than the outer diameter d of the sealing ring 11. .

On the other hand, the outer surface M2 of the subsequent taper 9 is inclined at an angle β of about 20 ° to 30 °, which is significantly lower with respect to the outer surface of the shank 5, with the outer surface M2 at its rear extension. It passes through the surface 14 of the sealing ring 11 in contact with, or in particular almost in contact with. The conical taper 9 also has a rounded edge 13 just behind the groove 10, the outer diameter B of which is about 0.2 mm to 0.4 mm greater than the outer diameter A of the flat zone 12. Smaller is preferred.

By the extension part 6 and the taper part 9 being formed in the above-mentioned geometric shape, the sealing ring 11 and the subsequent extension part 7 are opened by an assembly device (not shown) of the connecting end of the plastic pipe 3. Very good conditions are provided for the fitting up to the stop flange 8 via via (see FIG. 2).

It is to be understood that the geometrical shape of the pipe or hose connection 2 according to the invention can be equally used for the insertion member 1, not shown, in conjunction with the coupling member 1 in the plug connector mentioned earlier. something to do.

Claims (4)

It consists of a hose contact (2) which is formed in the engagement member (1) and can be inserted into the connection end of the flexible plastic hose (3), which hose contact has an insertion inclined surface (4) that extends conically at its free end. And a cylindrical shank 5 connected thereto and provided with a number of truncated conical extensions 6, 7 and a stop flange 8 extending annularly at the end of its insertion zone E. A conical tapered portion 9 is connected to the rear of the truncated conical enlarged portion 6, and an annular groove 10 is provided between the expanded portion 6 and the tapered portion 9, and the annular groove has a circular cross section. In the connector for plug connector for guiding fluid, in which the sealing ring 11 is embedded, The outer surface M1 of the first truncated conical extension 6 extends at an angle α of about 45 ° with respect to the outer surface of the shank 5 and is spaced slightly laterally of the shell 14 of the sealing ring 11. While passing through a), the outer surface M2 of the subsequent taper 9 is inclined at an angle β of about 20 ° to 30 ° significantly lower with respect to the outer surface of the shank 5 and its rear extension line. The connector for plug connector for guiding fluid, characterized in that in contact with the outer shell (14). The fluid (L) according to claim 1, characterized in that the length (L) of the cylindrical shank region (5) between the insertion inclined surface (4) and the first extension (6) is approximately equal to the diameter (S) of the shank. Guide for plug connector to guide. 3. The first extension (6) according to any one of the preceding claims, wherein the first extension (6) has a cylindrical flat zone (12) just in front of the groove (10), the diameter (A) of the flat zone (12) being a sealing ring. A connector for plug connector for guiding fluid, characterized in that it is slightly smaller than the outer diameter (d) of (11). 4. The conical tapered portion (9) according to claim 3, having a rounded edge portion (13) just behind the groove (10), the outer diameter (B) of the rounded edge portion being the outer diameter (A) of the flat zone (12). A connector for guiding a fluid, characterized in that about 0.2 mm to 0.4 mm smaller.