CN207569400U - A kind of connecting pipe - Google Patents

Abstract

The utility model provides a connecting pipe fitting, which includes two sections of composite pipes to be connected, flat joints, silk joints, and sealing pads. The flange on the composite pipe can stop the flat joint and the wire joint. A nut is arranged on the flat joint. The nut can rotate on the flat joint. The tail of the nut and the head end of the flat joint stop each other. The external thread that can be screwed with the nut, and the sealing gasket is arranged between the flanges of the two sections of composite pipes that are connected to each other. Compared with the existing connecting pipe fittings of the same kind, the utility model has greatly improved sealing performance, effectively reduces the resistance of the conveying medium compared with the socket connection of pure glass steel pipes, and has simple installation and construction operations. The utility model has the advantages of simple structure, novel design, fewer connecting pipes, simple operation, quick installation and the like.

Description

a connecting pipe

technical field

The utility model belongs to the technical field of pipe fitting processing, in particular to a connecting pipe fitting.

Background technique

Most of the oil delivery and water injection pipelines in existing oilfields still use steel pipes or pure glass steel pipes. Steel pipes have disadvantages such as poor anti-corrosion performance, short service life, large medium flow resistance, high anti-corrosion costs, no joints for installation, and high welding costs. Pure glass steel pipe joints are generally threaded, socketed, and clamped. The connection process is relatively cumbersome and slow, and the threaded connection needs to rotate the pipe body. At the same time, the medium resistance at the connection is large and the sealing performance is poor.

Utility model content

In view of the above technical defects, the utility model provides a connecting pipe fitting with simple structure, easy operation, excellent sealing performance, firm joint, convenience and practicality, and can reduce medium resistance.

The technical solution adopted by the utility model is: a connecting pipe fitting, including two sections of composite pipes, flat joints, wire joints, and sealing gaskets that need to be connected. At the end of the two-section composite pipe, the flanging on the composite pipe can stop the flat joint and the wire joint. A nut is arranged on the flat joint, and the nut can rotate on the flat joint. The tail of the nut and the head of the flat joint stop each other, and the wire joint The end of the pipe is provided with an external thread that can be screwed with the nut, and the sealing gasket is arranged between the flanges of the two sections of the composite pipe that are connected to each other.

Preferably, both the flat joint and the wire joint are joints with a tapered inner hole, and the joints of the corresponding composite pipe and the flat joint and the wire joint also have an outer diameter surface with the same taper, a tapered inner hole and an outer diameter with the same taper The contraction directions of the surfaces are all towards the ends of the butt joints of the composite pipes.

Preferably, the butt joint method of the ends of the flat joint and the wire joint is that the inner ring surface of one of the two snaps through the outer ring surface of the other.

Preferably, the flat joint and the silk joint are respectively bonded to the ends of the two sections of composite pipe by adhesive.

Preferably, a tapered groove with grooves is opened on the surface of the inner wall of the flat joint and the wire joint bonded with the composite pipe.

Preferably, the tapered portion of the tapered groove faces away from the end of the composite pipe.

Preferably, the outer diameter surface of the nut is provided with equally divided wrench grooves.

Because the taper inner hole of the utility model has a tapered inner hole and the outer diameter surface of the composite pipe with the same taper, the connecting pipe fittings are tightened as they are twisted and are not easy to fall off, which greatly improves the sealing performance of the composite pipe butt joint. Compared with the existing similar connecting pipe fittings, the sealing performance is greatly improved. Compared with the socket connection of pure glass steel pipes, the resistance of the conveying medium is effectively reduced, and the installation and construction are simple. The utility model has the advantages of simple structure, novel design, fewer connecting pipes, simple operation, quick installation and the like.

Description of drawings

Fig. 1 is the concrete structural representation of the utility model;

Fig. 2 is the schematic diagram of the structure of the utility model silk joint;

Fig. 3 is a structural schematic diagram of the flat joint of the present invention.

In the figure: 1-compound pipe; 2-flat joint; 3-wire joint; 4-sealing gasket; 5-nut; 6-flange; 7-tapered groove.

Detailed ways

The specific implementation of the utility model will be further described below in conjunction with the accompanying drawings. As shown in Figures 1, 2 and 3, the utility model provides a connecting pipe fitting, including two sections of composite pipe 1, a flat joint 2, and a silk joint that need to be connected. 3. Gasket 4, the ends of composite pipe 1 are processed with flanging 6, flat joint 2 and silk joint 3 are respectively fixed at the ends of two sections of composite pipe 1, and the flanging 6 on composite pipe 1 can stop the flat joint 2 And the silk joint 3, the butt joint method of the ends of the flat joint 2 and the silk joint 3 is that the inner ring surface of one of the two snaps through the outer ring surface of the other, which can be the inner ring of the flat joint 2 The outer ring surface of the sleeve thread joint 3 is snapped together. The flat joint 2 and the wire joint 3 are respectively bonded to the ends of the two sections of the composite pipe 1 by an adhesive, and the adhesive acts as a seal. The adhesive is composed of vinyl resin as filling material, corresponding curing agent, accelerator, quartz sand short fiber and coupling agent.

A nut 5 is arranged on the flat joint 2, and the nut 5 can rotate on the flat joint 2. The tail of the nut 5 and the head end of the flat joint 2 stop each other, and the end of the wire joint 3 has an external thread that can be screwed with the nut 5 , the gasket 4 is arranged between the flanges 6 where the two segments of the composite pipe 1 are butted with each other. The nut 5 connects the flat joint 2 and the wire joint 3 together, and presses the sealing gasket 4 to play a sealing role. At the same time, under the action of the flange 6, it is ensured that the fluid medium does not contact the flat joint 2 and the silk joint 3, so as to achieve the purpose of corrosion resistance.

Furthermore, both the flat joint 2 and the silk joint 3 are joints with a tapered inner hole, and the corresponding composite pipe 1, the flat joint 2 and the silk joint 3 also have an outer diameter surface with the same taper, and the tapered inner hole and the tapered The contraction directions of the outer diameter surfaces with the same taper are all towards the butt joint end of the composite pipe 1 . The flat joint 2 and the wire joint 3 are designed as joints with a taper in order to provide a shrinking force all the time during the process of tightening the nut 5, so that the tightening effect will be achieved.

Furthermore, a grooved tapered groove 7 is formed on the inner wall surface of the flat joint 2 and the silk joint 3 bonded to the composite pipe 1, and the tapered part of the tapered groove 7 faces the direction away from the end of the composite pipe 1, The reason for this design is that under the tension of the nut 5, both the flat joint 2 and the wire joint 3 and the composite pipe 1 have a tendency to move in the opposite direction, so there are grooves on the inner wall surfaces of the flat joint 2 and the wire joint 3 The tapered groove 7, the tapered groove 7 is filled with adhesive, on the one hand, it increases the bonding force between the pipes, and on the other hand, it increases the friction between them to counteract the tendency of making them move each other pull.

Furthermore, the outer diameter surface of the nut 5 is provided with equally divided wrench grooves, which is convenient for tightening the nut 5 with tools.

The above is only a preferred embodiment of the present utility model. It should be pointed out that, for those of ordinary skill in the art, without departing from the inventive concept of the present utility model, deformations and improvements can also be made, all of which should belong to this utility model. Protection scope of utility model.

Claims (7)

1. A connecting pipe fitting, characterized in that: it includes two sections of composite pipes, flat joints, silk joints, and gaskets that need to be butted, and the ends of the composite pipes are all flanged, and the flat joints and silk joints are respectively It is fixed at the ends of two composite pipes, the flange on the composite pipe can stop the flat joint and the wire joint, the flat joint is provided with a nut, and the nut can be rotated on the flat joint, and the nut’s The head end of the tail and the flat joint stop each other, the end of the wire joint has an external thread that can be screwed with the nut, and the sealing gasket is arranged between the flanges of the two sections of composite pipes that are connected to each other. 2. The connecting pipe fitting according to claim 1, characterized in that: both the flat joint and the wire joint are joints with tapered inner holes, and correspondingly, the junction between the composite pipe and the flat joint and the wire joint also has the same taper The shrinkage direction of the outer diameter surface of the tapered inner hole and the outer diameter surface with the same taper is towards the end of the butt joint of the composite pipe. 3. The connecting pipe fitting according to claim 2, characterized in that: the butt joint method of the ends of the flat joint and the wire joint is that the inner ring surface of one of the two snaps through the outer ring surface of the other . 4. The connecting pipe fitting according to claim 3, characterized in that: the flat joint and the silk joint are respectively bonded to the ends of the two sections of the composite pipe by adhesive. 5. The connecting pipe fitting according to claim 4, characterized in that: the inner wall surface of the flat joint and the wire joint bonded with the composite pipe is provided with a tapered groove with grooves. 6. The connecting pipe according to claim 5, wherein the tapered portion of the tapered groove faces away from the end of the composite pipe. 7. The connecting pipe fitting according to claim 1, characterized in that: the outer diameter surface of the nut is provided with equally divided wrench grooves.