CN2323227Y

CN2323227Y - Self-locking quick pipe joint

Info

Publication number: CN2323227Y
Application number: CN 97205630
Authority: CN
Inventors: 沈潕源; 罗庆宇; 张庆丰
Original assignee: KAISA ALUMINIUM INDUSTRY CO LTD GUIZHOU
Current assignee: KAISA ALUMINIUM INDUSTRY CO LTD GUIZHOU
Priority date: 1997-12-15
Filing date: 1997-12-15
Publication date: 1999-06-09
Anticipated expiration: 2007-12-15

Abstract

The utility model relates to a pipe joint, particularly a self-locking quick pipe joint. Both ends of a pipe joint body (3) are provided with an internal thread (5), taper holes (6), and position steps (7). A clamping thread bush (2) is provided with a contraction joint (11). The clamping thread bush (2) and a sealing ring (4) are sheathed on a pipe (1), and are inserted in the pipe joint body (3). The clamping thread bush is twisted tightly. The sealing ring is pushed to be closely contacted with the taper holes (6). A thread bush provided with the contraction joint (11) is contracted inward to clamp the pipe (1) tightly. When pipelines without needs to be sealed are connected, a sealing ring can be omitted. Only the pipe joint body and the clamping thread bush are used to clamp the pipe tightly. The self-locking quick pipe joint has quick and convenient operation. The pipe does not need threaded wires. The self-locking quick pipe joint is suitable for the connection of pipelines with various materials.

Description

The pipe coupling of self-locking internal cover type fast-assembling

The utility model relates to pipe coupling, and particularly a kind of need not carried out the fast-assembling pipe coupling that mantle fiber is handled to the pipe termination.

Pipeline connects pipe joint and the pipe termination mantle fibers respectively that adopt more in the prior art, with screw thread two-part are linked together, and the processing of the screw thread of pipe termination mostly is field fabrication, workload is big, and operated implement heaviness, bring inconvenience to construction, on the other hand, because the necessary machining screw in pipe termination, under the prerequisite that guarantees necessary structural strength, screw thread should have certain depth, therefore, tube wall also must keep corresponding thickness, like this, and in the low-pressure fluid transporting system, the thickness of tube wall is not to be determined by hydrodynamic pressure, but decide by the screw thread processing mode, thereby caused the waste of tubing, also limited the good utilization of thin walled tube in pipe-line system of some intensity.

In addition, some tubing as plastic tube, is to adopt bonding method to connect, because viscose glue needs the regular hour to solidify, operates also miscellaneously, and linking intensity is subjected to the influence of viscose quality.

The purpose of this utility model is: the pipe coupling of a kind of self-locking internal cover type fast-assembling is provided, and it need not mantle fiber is carried out in the pipe termination, uses simple mounting or dismounting tools, can install and remove pipeline fast.

Formation of the present utility model: by the pipe junctor, gland nut and seal ring are formed, pipe junctor (3) is a rounded cylindrical, there is internal thread (5) at two ends in the tube, the screw thread the inside is the little taper hole of outer imperial palace (6), the little head end of taper hole (6) has positioning step (7), in the middle of the gland nut (2) is axial circular hole, an end is to tighten cap head (8) on the cylindrical, the other end is external thread sleeve (9), external thread sleeve (9) end face is a little conical surface (10), have contraction joint (11) in external thread sleeve (9) end, seal ring (4) is an annular cone, be installed in the taper hole (6) in the pipe junctor (3), on the internal thread (5) with gland nut (2) spinning in pipe junctor (3), form the pipe coupling of self-locking internal cover type fast-assembling again.When the pipeline that need not seal connects,, only go up gland nut (2) is installed at the internal thread (5) of pipe junctor (3) without seal ring (4).

Compared with the prior art, the utility model is rational in infrastructure, and cover compresses mode in adopting, and can play not only to seal but also the double effects of clamping tube, and is convenient to operation, and therefore pipe, can use thin walled tube without mantle fiber, can make the pipeline lightweight.

The pipeline that the utility model also can be used for need not sealing connects, and connects as electrical conduits, can save seal ring, only uses pipe junctor and gland nut to connect.

Accompanying drawing 1 is the utility model connection figure;

Accompanying drawing 2 is pipe junctor structural drawing;

Accompanying drawing 3 is gland nut plan views;

Accompanying drawing 4 is right elevations of accompanying drawing 3;

Accompanying drawing 5 is plan views of accompanying drawing 3;

Accompanying drawing 6 is seal ring plan views;

Accompanying drawing 7 is left views of accompanying drawing 6.

Embodiment of the present utility model: as shown in Figure 2, at the endoporus two ends machining internal threads (5) of pipe junctor (3), the taper hole (6) that imperial palace is little outside the inside of internal thread (5) has is at the positioning step (7) of the oriented central protuberance of little head end of taper hole.

Shown in accompanying drawing 3, accompanying drawing 4, accompanying drawing 5, the circular hole that installation pipe (1) is arranged in the middle of the gland nut (2), on the excircle, one end is to tighten cap head (8), the other end is external thread sleeve (9), in the end of external thread sleeve (9) is the little conical surface (10), has four contraction joints (11) vertically in the end of external thread sleeve (9).

Shown in accompanying drawing 6, accompanying drawing 7, seal ring (4) is the circular cone tube of middle band circular hole.

As shown in Figure 1, gland nut (2) and seal ring (4) are enclosed within on the pipe (1), in the insertion tube junctor (3), tighten gland nut (2), promoting seal ring (4) closely contacts with the taper hole (6) of pipe junctor (3), simultaneously, have taper hole (6) conical surface guiding on the managed junctor of gland nut (2) front end (3) of contraction joint (11) and inwardly shrink, pipe (1) is clamped.

When the pipeline that does not need to seal connects, can save seal ring (4), only use pipe junctor (3) to connect pipe (1) is clamped with gland nut (2).

Claims

1, the pipe coupling of a kind of self-locking internal cover type fast-assembling, by the pipe junctor, gland nut and seal ring are formed, it is characterized in that: pipe junctor (3) is rounded cylindrical, there is internal thread (5) at two ends in the tube, the screw thread the inside is the little taper hole of outer imperial palace (6), the little head end of taper hole (6) has positioning step (7), in the middle of the gland nut (2) is axial circular hole, an end is to tighten cap head (8) on the cylindrical, the other end is external thread sleeve (9), external thread sleeve (9) end face is a little conical surface (10), have contraction joint (11) in external thread sleeve (9) end, seal ring (4) is an annular cone, is installed in the taper hole (6) in the pipe junctor (3), on the internal thread (5) with gland nut (2) spinning in pipe junctor (3), form the pipe coupling of self-locking internal cover type fast-assembling again.

2, self-locking internal cover type fast-assembling according to claim 1 pipe coupling is characterized in that: when the pipeline that need not seal connects, without seal ring (4), only go up at the internal thread (5) of pipe junctor (3) gland nut (2) is installed.