Fast coupling unit with integrated check valve

Abstract

The invention relates to a fast coupling unit (1) for lines conducting free-flowing media, in which a check valve (5) is integrated for controlling the pressure of the medium or venting the lines conducting the medium. Said check valve (5) is arranged in a secondary branch (4) that is opened outwards and extends from the main line of the fast coupling unit (1). Its valve body (10) is moved by a restoring force from its position blocking the passage of the medium into its position allowing the passage of the medium by means of a valve lifter (12) that can be accessed from the outside. The secondary branch (4) is at the same time the valve housing (4) of the check valve (5). The valve body (10) that can be axially moved in the valve housing (4) is configured in an integral manner and has a valve cone (11), the valve seat of which is configured as a corresponding conical surface (16) in a hollow counterpiece (17) sealingly inserted in the open end of the secondary branch (4) or valve housing (4) against the inner wall thereof. The check valve (5) has the advantage that it consists of few individual parts, which can be produced and mounted in a simple and economical manner and are preferably made of plastic. This enables greater air-tightness of the valve when it is closed.

Description

technical field [0001] The invention relates to a quick connection device for a transfer pipeline of a flowable or pourable medium, which includes an integrated valve body for controlling the pressure of the medium or opening the medium transmission pipeline, wherein the check valve is installed in the auxiliary On the branch pipe, the branch pipe is branched from the main line of the quick connection device, the opening leads to the outside, and its valve body can be moved from its position preventing the passage of the medium against a restoring force to the externally accessible valve stem so that The location through which the media passes. Background technique [0002] European patent application EP 1223392A1 describes a valve body for filling the cooling circuit of an air-conditioning system with coolant. The valve housing of this valve body has a connecting piece, by means of which the valve body can be swiveled to one side in the area of ​​the filling opening on the...

AI Technical Summary

Problems solved by technology

[0007] In order to be operable, the valve body includes a large number of separate parts (not all mentioned here), which increases the cost and complexity of manufacturing and installation

Although the degree of sealing obtained by the valve body is sufficient for the above-mentioned purposes, a truly reliable and completely leak-free closure cannot be obtained with the past form of the deformable gasket resting on the annular surface of the valve housing.

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