CN203500700U

CN203500700U - Petroleum pipeline end connecting piece

Info

Publication number: CN203500700U
Application number: CN201320315224.2U
Authority: CN
Inventors: 沈金章
Original assignee: Wuxi Jinding Oil Pipe Fittings Co Ltd
Current assignee: Wuxi Jinding Oil Pipe Fittings Co Ltd
Priority date: 2013-06-04
Filing date: 2013-06-04
Publication date: 2014-03-26
Anticipated expiration: 2023-06-04

Abstract

The utility model discloses a petroleum pipeline end connecting piece, which comprises a main body, wherein the main body is of a pipe structure, the middle part of the main body is provided with an annular convex part, the two ends of the convex part are provided with inclined transition conical surfaces, the outer surface of the main body at the outer side of each transition conical surface is provided with external threads, each transition conical surface is provided with conical threads, the center of the convex part of the main body is provided with an integral hexagon nut structure, the main body is of a left and right symmetrical structure, the external threads and the conical threads are respectively double threads, and the cross section of the thread form is same. The petroleum pipeline end connecting piece has the advantages that by adopting the external threads and the conical threads, the petroleum pipeline end connecting piece and a petroleum pipeline end can be sealed and connected, and the connecting effect is stable; when the torsion force is applied to the external threads, the thread form of the conical threads slightly changes, and then the sealing function is realized.

Description

A kind of petroleum pipeline pipe end link

Technical field

The utility model relates to a kind of petroleum pipeline pipe end link, belongs to petroleum pipeline technical field.

Background technique

Sealing problem after petroleum pipeline docking is a very important problem, and prior art is often used the seal approach such as seal ring, seal ring, expansion structure to seal, and its structure is comparatively complicated, and sealing declines along with the passing of service time.So need to design a kind of petroleum pipeline pipe end link of simple in structure, good airproof performance.

Model utility content

In order to solve the technical problem of the pipe end constructions seal structure complex of petroleum pipeline, solve the poor problem of endurance of seal approach simultaneously, the utility model provides a kind of petroleum pipeline pipe end link.

The purpose of this utility model is carried out specific implementation by the following technical programs:

A kind of petroleum pipeline pipe end link, comprise body, body is tubular structure, the middle part of body has the projection of ring-type, the two ends of projection have the transition conical surface of inclination, on this external surface in transition conical surface outside, be provided with outside thread, on the described transition conical surface, be provided with tapered thread, the protruding center of described body has integrated hexagon nut structure.

Body is symmetrical structure.

Described outside thread, tapered thread are two screw threads, and tooth form cross section is identical.

A kind of petroleum pipeline pipe end link described in the utility model, by outside thread and tapered thread structure, can realize between petroleum pipeline pipe end link and the pipe end of petroleum pipeline and seal and contact, and connection effect stability, when outside thread, place is continuously applied lashing force, make the thread profile of tapered thread position produce minor variations, and then reach the effect of sealing.

Accompanying drawing explanation

According to drawings and embodiments the utility model is described in further detail below.

Fig. 1 is a kind of structural drawing of petroleum pipeline pipe end link.

Fig. 2 is use view of the present utility model.

In figure: 1, body; 2, projection; 3, the transition conical surface; 5, hexagon nut structure.

Embodiment

As shown in Figure 1-2, a kind of petroleum pipeline pipe end link described in the utility model embodiment, comprise body 1, body is tubular structure, and the middle part of body 1 has the projection 2 of ring-type, and the two ends of projection 2 have the transition conical surface 3 of inclination, on this external surface in the transition conical surface 3 outsides, be provided with outside thread, on the described transition conical surface 3, be provided with tapered thread, the center of the projection 2 of described body 1 has integrated hexagon nut structure 5, and described hexagon nut structure 5 is for making body screw operation.

Body 1 is symmetrical structure.

Claims

1. a petroleum pipeline pipe end link, comprise body, it is characterized in that, body is tubular structure, the middle part of body has the projection of ring-type, and the two ends of projection have the transition conical surface of inclination, on this external surface in transition conical surface outside, are provided with outside thread, on the described transition conical surface, be provided with tapered thread, the protruding center of described body has integrated hexagon nut structure.

2. a kind of petroleum pipeline pipe end link as claimed in claim 1, is characterized in that, body is symmetrical structure.

3. a kind of petroleum pipeline pipe end link as claimed in claim 1, is characterized in that, described outside thread, tapered thread are two screw threads, and tooth form cross section is identical.