CN2918944Y

CN2918944Y - Screw-threaded pipe joint

Info

Publication number: CN2918944Y
Application number: CN 200620043941
Authority: CN
Inventors: 王国林; 王淑诗; 王伟凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-12
Filing date: 2006-07-12
Publication date: 2007-07-04
Anticipated expiration: 2016-07-12

Abstract

The utility model provides a screw pipe connector, and comprises a connector, a pipe line, a connection nut and a seal ring. The connection nut is directly connected with the external side surface of the bulge ring of the pipe line. The internal pressing surface of the connection nut is in line with the external curve of the bulge of the pipe. The internal side of the pipe lien bulge ring has a seal ring. The external side of the seal ring cooperates with the internal end of the pipe bulge ring. The internal column face of the seal ring cooperates with the external column face of the pipe line. The internal taper surface of the seal ring cooperates with the external taper surface of the connector. The utility is a compact screw pipe connector with reliable sealing performance.

Description

Threaded pipe joint

Technical field

The utility model relates to a kind of pipe coupling, the threaded pipe joint that especially a kind of pipeline that can be used for industries such as various water pipes and medicine, chemical industry, food is connected with pipeline.

Background technique

Existing threaded pipe joint such as China Patent No. are called a kind of patent of invention of pipe joint for the ZL01105997.4 name, form by joint, gasket seal, lock ring cover, attaching nut, the attaching nut is by compressing lock ring cover and connecting tube and then compressing gasket seal, this pipe coupling is owing to adopt the lock ring cover to make structure too complicated, and wherein the sealing effect of gasket seal is not ideal enough.

Summary of the invention

The purpose of this utility model provides a kind of compact structure and reliable sealing threaded pipe joint.

To achieve these goals, the technical solution of the utility model is such: a kind of threaded pipe joint, comprise joint, pipeline, the attaching nut, seal ring, the attaching nut is directly pressing the outside end face of the pipe bulge loop of pipeline, it is consistent with the outside end face curved surface of the pipe bulge loop that matches to compress end face in the attaching nut, the inner side end of the pipe bulge loop of pipeline is provided with seal ring, match with the inner side end of pipe bulge loop in the exterior edge face of seal ring, the inner cylindrical surface of seal ring matches with the external cylindrical surface of pipeline, the inner conical surface of seal ring matches with the male cone (strobilus masculinus) of joint, wherein, the inner conical surface of seal ring, inner cylindrical surface, the exterior edge face constitutes a wedge-type seal circle together, inner conical surface, inner cylindrical surface, the exterior edge face is respectively the inclined-plane of wedge-type seal circle, face and be subjected to thrust face directly, correspondingly, the male cone (strobilus masculinus) of joint, the external cylindrical surface of pipeline, the inner side end of pipe bulge loop constitutes a wedge-type seal seat, the male cone (strobilus masculinus) of joint together, the external cylindrical surface of pipeline, the inner side end of pipe bulge loop is respectively the inclined-plane of wedge-type seal seat, face directly and thrust face.

Since several of the seal ring in the above-mentioned technical solution with pipe coupling in other correlation surface close fit, and specific wedge-type seal circle can reach special reliable sealing effect with corresponding wedge-type seal seat, and have only joint, pipeline, attaching nut, the several parts of seal ring in the technological scheme, simple in structure, easy to connect, can use widely and being connected of various pipelines and pipeline.

Description of drawings

The structural drawing of the threaded pipe joint that Fig. 1 provides for the utility model.

The structural drawing of seal ring in the threaded pipe joint that Fig. 2 provides for the utility model.

Embodiment

Be described in further detail below in conjunction with accompanying drawing and mode of execution of the present utility model:

Wherein: 1, joint; 2, pipeline; 3, attaching nut; 4, seal ring; 5, pipe bulge loop; 6, nut tail end protecting jacket; 4-1, exterior edge face; 4-2, inner cylindrical surface; 4-3, inner conical surface; 4-4, transition external cylindrical surface.

Shown in Figure 2 as Fig. 1, the application's threaded pipe joint comprises joint 1, pipeline 2, the attaching nut 3, seal ring 4, attaching nut 3 is directly pressing the outside end face of the pipe bulge loop 5 of pipeline 2, it is consistent with the outside end face curved surface of the pipe bulge loop 5 that matches to compress end face in the attaching nut 3, the inner side end of the pipe bulge loop 5 of pipeline 2 is provided with seal ring 4, the exterior edge face 4-1 of seal ring 4 matches with the inner side end of pipe bulge loop 5, the inner cylindrical surface 4-2 of seal ring 4 matches with the external cylindrical surface of pipeline 2, the inner conical surface 4-3 of seal ring 4 matches with the male cone (strobilus masculinus) of joint 1, wherein, the inner conical surface 4-3 of seal ring 4, inner cylindrical surface 4-2, exterior edge face 4-1 constitutes a wedge-type seal circle together, inner conical surface 4-3, inner cylindrical surface 4-2, exterior edge face 4-1 is respectively the inclined-plane of wedge-type seal circle, face and be subjected to thrust face directly, correspondingly, the male cone (strobilus masculinus) of joint 1, the external cylindrical surface of pipeline 2, the inner side end of pipe bulge loop 5 constitutes a wedge-type seal seat, the male cone (strobilus masculinus) of joint 1 together, the external cylindrical surface of pipeline 2, the inner side end of pipe bulge loop 5 is respectively the inclined-plane of wedge-type seal seat, face directly and thrust face.The obvious structure of this pipe coupling is very compact, and the wedge-type seal circle be subjected to thrust face under the effect of the close thrust face of wedge shape, thereby the inclined-plane of wedge-type seal circle and face directly and can and face crowded more being adjacent to more directly with the inclined-plane of wedge-type seal seat and reach a kind of desirable sealing effect, wherein also have characteristics to be no matter inclined-plane and being adjacent to of inclined-plane seal or face directly and face directly to be adjacent to sealing or thrust face and to be subjected to the sealing that is adjacent to of thrust face all be uniform face seal rather than linear sealing, thereby sealing effect is more reliable.

When the inner side end of the exterior edge face of seal ring 4 4-1 and pipe bulge loop 5 all be positioned at one with the perpendicular plane of conduit axis on the time, thrust can more directly produce sealing effect.

The utility model is provided with nut tail end protecting jacket 6 in attaching nut 3 the outside, can make the pipe that is connected that better resistance to flexure is arranged near joint.

As shown in Figure 1 and Figure 2, between the inner conical surface 4-3 of wedge-type seal circle and exterior edge face 4-1, be provided with transition external cylindrical surface 4-4, be provided with the transition inner cylindrical surface between joint 1 male cone (strobilus masculinus) of wedge-type seal seat and pipe bulge loop 5 inner side ends, owing to wherein be provided with the transition inner cylindrical surface on transition external cylindrical surface 4-4 and the corresponding joint 1, thereby can make pipe coupling possess long sealing to compress distance, make that seal ring 4 might be pressed tightlyer, sealing effect is better.

In the utility model, definite benchmark of interior exterior orientation is: axially inwardly to serve as towards joint middle part direction, axially outwards be away from joint middle part direction at first; Secondly with towards pipeline or joint axial direction for radially inside, be radially outward away from pipeline or joint axial direction.

Claims

1, a kind of threaded pipe joint, comprise joint (1), pipeline (2), attaching nut (3), seal ring (4), it is characterized in that: attaching nut (3) is directly pressing the outside end face of the pipe bulge loop (5) of pipeline (2), it is consistent with the outside end face curved surface of the pipe bulge loop (5) that matches to compress end face in the attaching nut (3), the inner side end of the pipe bulge loop (5) of pipeline (2) is provided with seal ring (4), match with the inner side end of pipe bulge loop (5) in the exterior edge face (4-1) of seal ring (4), the inner cylindrical surface (4-2) of seal ring (4) matches with the external cylindrical surface of pipeline (2), the inner conical surface (4-3) of seal ring (4) matches with the male cone (strobilus masculinus) of joint (1), wherein, the inner conical surface (4-3) of seal ring (4), inner cylindrical surface (4-2), exterior edge face (4-1) constitutes a wedge-type seal circle together, inner conical surface (4-3), inner cylindrical surface (4-2), exterior edge face (4-1) is respectively the inclined-plane of wedge-type seal circle, face and be subjected to thrust face directly, correspondingly, the male cone (strobilus masculinus) of joint (1), the external cylindrical surface of pipeline (2), the inner side end of pipe bulge loop (5) constitutes a wedge-type seal seat together, the male cone (strobilus masculinus) of joint (1), the external cylindrical surface of pipeline (2), the inner side end of pipe bulge loop (5) is respectively the inclined-plane of wedge-type seal seat, face directly and thrust face.

2, threaded pipe joint according to claim 1 is characterized in that: the exterior edge face (4-1) of seal ring (4) and the inner side end of pipe bulge loop (5) all be positioned at one with the perpendicular plane of conduit axis on.

3, threaded pipe joint according to claim 1 and 2 is characterized in that: attaching nut's (3) the outside is provided with nut tail end protecting jacket (6).

4, threaded pipe joint according to claim 1 and 2, it is characterized in that: be provided with transition external cylindrical surface (4-4) between the inner conical surface of wedge-type seal circle (4-3) and exterior edge face (4-1), be provided with the transition inner cylindrical surface between the joint of wedge-type seal seat (1) male cone (strobilus masculinus) and pipe bulge loop (5) inner side end.

5, threaded pipe joint according to claim 3, it is characterized in that: be provided with transition external cylindrical surface (4-4) between the inner conical surface of wedge-type seal circle (4-3) and exterior edge face (4-1), be provided with the transition inner cylindrical surface between the joint of wedge-type seal seat (1) male cone (strobilus masculinus) and pipe bulge loop (5) inner side end.