CN2050523U - Self-fastened pipe coupling - Google Patents

Abstract

The utility model relates to a self-fastening type pipe coupling. The pipe walls of the pipe head section and the pipe tail section of the body are provided with through holes. Two rubber pipes are respectively sheathed on the through holes and respectively clamped by two rings. The rubber pipe between the two clamping rings is also pressed by a pressing strip. While in use, the outward extension pipe is sleeved on the pipe coupling by hand. The goal of sealing connection is achieved by the pressure fluid in the outward extension pipe to expand the rubber pipe and press tightly on the inner wall of the outward extension pipe. The self-fastening type pipe coupling is suitable for the connection of pneumatic pipes and hydraulic pipes, particularly the temporary connection between pressure pipes.

Description

Self-fastened pipe coupling

The utility model is a kind of pipe joint of connecting between pneumatic tube or hydraulic tube pipe of being used for.

At present, the various pipe joints that are used for connecting between the pressure tube pipe are to reach purpose of connecting with mechanical force or Adhesion force, use inconvenience, especially for the interim connection between pipe.

When providing a kind of use, the purpose of this utility model connects and the equal pressure tube pipe joint conveniently of dismounting.

Basic design of the present utility model is: the main body of pipe joint is a pipe, pipe head, in, have through hole on the two sections tube walls of head, tail in three sections on the tail; Overlapping one respectively on head section and the rear has certain flexible soft rubber tube, and each is clamped on the pipe with two snap rings.During work, utilize the pressure tube internal pressure that is connected that rubber pipe is bulged, be pressed on the inwall of pressure tube, reach the purpose that is tightly connected.

To contrast embodiment's accompanying drawing of the present utility model below and specify structure of the present utility model.

Fig. 1 is a schematic representation of the present utility model.

Fig. 2 is a main body pipe schematic representation of the present utility model.

Fig. 3 is the partial sectional view of the utility model when in running order.

Fig. 4 is that the A-A of Fig. 3 is to view.

The utility model is made up of main body pipe (1), rubber pipe (2), end snap ring (3), snap ring (4), retaining ring (5) and press strip (6).Main body pipe (1) is made with steel pipe, plating zinc on surface, comprise head, in, three sections on tail.One boss (1a) is arranged on the stage casing, and the external diameter nominal size in stage casing and the externally connected pipe that will connect (7), (8) internal diameter are identical, movingly.The external diameter of head section and rear has through hole all less than the external diameter in stage casing on the tube wall, the aperture of through hole and the gross area should be big as far as possible.Respectively overlapping one on head section and the rear has certain flexible soft rubber tube (2), and the length of rubber pipe (2) is shorter than head section and rear respectively, and is hiding the tube wall through hole.End snap ring (3) is clamped on the end of rubber pipe (2) by main body pipe (1) stage casing on the main body pipe (1), snap ring (4) is clamped on rubber pipe (2) on the main body pipe (1) at distance rubber pipe (2) the other end mouth of pipe one segment length place, behind the chucking, the external diameter of end snap ring (3) and snap ring (4) is identical with the external diameter in main body pipe (1) stage casing.On the position tube wall of device end snap ring (3) and snap ring (4) on main body pipe (1) head, the rear, should there be through hole.Between end snap ring (3) and snap ring (4), also compressing a press strip (6) on the rubber pipe (2), for the benefit of tightening, the position that press strip (6) is held snap ring (3) and snap ring (4) to block is a flat, after the assembling, press strip (6) upper surface should be lower than the cylindrical of snap ring.Two retaining rings (5) tightly are enclosed within respectively on the mouth of pipe of main body pipe (1) two ends, are used to prevent that externally connected pipe (7), (8) from damaging rubber pipe (2) when packing into.Be the resistance of minimizing for fluid, Hole chamfering in the pipe joint two ends, under the prerequisite of proof strength, the tube wall of this pipe joint is thin as far as possible.

During use, externally connected pipe is packed into this pipe joint two just can.The mouth of pipe of externally connected pipe (7), (8) is spacing by boss (1a).During work, the through hole of pressure fluid on main body pipe (1) head, rear tube wall bulges rubber pipe (2), makes it to be pressed on the externally connected pipe tube wall.At this moment, locate at snap ring (4), form little annular chamber (9) between externally connected pipe and the rubber pipe (2), press strip (6) is pushed down rubber pipe (2) and is formed small channel (10), and chamber (9) is communicated with the external world.The inside and outside pressure official post rubber pipe (2) of rubber pipe (2) leans on one section (2a) of main body pipe (1) mouth of pipe to be attached on the externally connected pipe tube wall, mainly seals; Whole section rubber pipe (2b) between end pressure ring (3) and the pressure ring (4) evenly is pressed on the externally connected pipe tube wall, works the effect of being fastenedly connected, utilize this kind principle, the utility model also can be made elbow, threeway, four-way or the like.

The pressure tube that the utility model can be used for various materials connects, need not any instrument during use, as long as the pipe sliding sleeve is gone into this pipe joint with hand.The pipe internal pressure is big more during work, and the self-tightening effect is good more, after having worked, as long as the pipe internal pressure disappears, just pipe can be drawn back with hand.But be not enough to rubber pipe (2) is bulged when overlaying on tube wall when the pressure tube internal pressure is low to moderate, have small leakage.This pipe joint is easy to use, is particularly suitable for the interim connection between the pressure tube.

Claims (2)

1, a kind of self-tightening pipe coupling is characterized in that:

A, a main body pipe is arranged, have through hole on the linkage section tube wall of main body pipe;

Overlapping a rubber pipe on the linkage section of b, main body pipe respectively, hiding the tube wall through hole, one snap ring is clamped on the end of rubber pipe away from the main body pipe mouth of pipe on the main body pipe, and another snap ring is clamped on rubber pipe on the main body pipe at the distance rubber pipe the other end one segment length place;

C, above-mentioned two snap rings are pressed in a press strip on the rubber pipe between these two snap rings.

2, pipe joint according to claim 1 is characterized in that on the main body pipe stage casing boss being arranged.

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