CN209146716U

CN209146716U - A kind of steep-taper pipe end constructions

Info

Publication number: CN209146716U
Application number: CN201821779356.XU
Authority: CN
Inventors: 曹进; 卞红; 李建
Original assignee: NANTONG JIANGHUA THERMAL POWER MACHINERY CO Ltd
Current assignee: NANTONG JIANGHUA THERMAL POWER MACHINERY CO Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2019-07-23
Anticipated expiration: 2028-10-31

Abstract

The utility model discloses a kind of steep-taper pipe end constructions, including taper tube, the taper tube has large aperture end and small-bore end, and large aperture end is connected with cylindrical tube, and small-bore end circumferencial direction diameter has been pressed downward one or more fold, which is trigone wimble structure.The utility model passes through the fold in pipe end setting pushing, to reduce the diameter of portlet, and can be met the requirements according to one or more fold of aperture ratio setting, it in processing is pushed using local material, difficulty of processing can be greatly reduced compared to full circle pushing.

Description

A kind of steep-taper pipe end constructions

Technical field

The utility model relates to pipe end constructions more particularly to a kind of steep-taper pipe end constructions.

Background technique

Crucial end can be all designed to conical shape (such as Fig. 1 when needing to carry out taper navigation designing with pipe end by pipe fitting It is shown), one end aperture is A, and one end aperture is B, and A > B, this taper pipe end pass through taper pipe end forming machine in processing It realizes, however when pipe thickness is less than 1.2mm, if when A/B > 15%, the axial force that when molding generates can make tubing unstability Bulging is generated, cannot once complete to process, and in practical set, A/B reaches 52% sometimes, in order to meet processing request, It needs to be divided into four times to be processed, gradually reduces the end B diameter every time, this operation is so that difficulty of processing greatly improves, and just Point counting is four processing, still there is lapping defect in end surface, influences to assemble.

Utility model content

The purpose of this utility model is to provide a kind of steep-taper pipe end constructions, by the way that the fold pushed is arranged in pipe end, It to reduce the diameter of portlet, and can be met the requirements, added according to one or more fold of aperture ratio setting Working hour is pushed using local material, and difficulty of processing can be greatly reduced compared to full circle pushing.

To achieve the above object, the utility model proposes following technical solutions:

A kind of steep-taper pipe end constructions, including taper tube, the taper tube have large aperture end and small-bore end, macropore Diameter end is connected with cylindrical tube, and small-bore end circumferencial direction diameter has been pressed downward one or more fold, which is triangular pyramid knot Structure.

Preferably, the opening angle of the fold is 65 °.

Preferably, the fold be it is multiple, pipe end is arranged in circumference at equal intervals.

Preferably, the outer end depth of the fold is 1.5mm.

Preferably, the cylindrical tube is equipped with locating slot.

Compared with prior art, a kind of steep-taper pipe end constructions that the utility model discloses, have the following beneficial effects:

By the fold pushed in pipe end setting, to reduce the diameter of portlet, and can be set according to aperture ratio One or more fold is set to meet the requirements, in processing is pushed using local material, pushes greatly drop compared to full circle Low difficulty of processing.

Detailed description of the invention

Fig. 1 is existing pipe end constructions side view；

Fig. 2 is the sectional side view of the utility model；

Fig. 3 is the front view of the utility model；

Fig. 4 is the structure chart of one fold of the utility model；

Fig. 5 is the structure chart of two fold of the utility model；

Fig. 6 is the structure chart of three fold of the utility model；

Fig. 7 is the structure chart of four fold of the utility model.

Specific embodiment

Clear, complete description is carried out below in conjunction with technical solution of the attached drawing to the utility model embodiment.

As shown in Fig. 2 ~ 3, a kind of revealed steep-taper pipe end constructions of the utility model, including taper tube 1, the taper tube Side be large aperture end A, the other side is small-bore end B, and large aperture end is connected with cylindrical tube 2, and tube surfaces be equipped with it is fixed Position slot 3, small-bore end circumferencial direction diameter have been pressed downward one or more fold 4, this fold quantity is according to large aperture and aperture Diameter proportion requirement selection, if ratio greatly if only need to push a fold, if multiple (2 ~ 4) can be set greatly in ratio, It is that circumference is arranged at equal intervals when multiple fold are arranged.

The fold is trigone wimble structure, and the opening angle α at cone bottom is 65 °, and fold outer end depth is 1.5mm.

The pipe end of the structure is when further decreasing aperture processing, it is only necessary to local radial precompressed is carried out, so as to To change the axial force generated in process, surface lapping defect is prevented, different fold can be selected according to aperture demand Quantity, attached drawing 4 ~ 7 give the structure chart of four kinds of quantity, with reference to the accompanying drawings as can be seen that the fold of setting different number, minimum aperture Diameter can be different, to realize the setting of aperture ratio.

The technology contents and technical characteristic of the utility model have revealed that as above, however those skilled in the art still may be used Can teaching based on the utility model and announcement and make various replacements and modification without departing substantially from the spirit of the present invention, therefore, this Utility model protection range should be not limited to the revealed content of embodiment, and should include the various replacements without departing substantially from the utility model And modification, and covered by present patent application claim.

Claims

1. a kind of steep-taper pipe end constructions, including taper tube, it is characterised in that: the taper tube has large aperture end and small-bore End, large aperture end is connected with cylindrical tube, and small-bore end circumferencial direction diameter has been pressed downward one or more fold, which is Trigone wimble structure.

2. a kind of steep-taper pipe end constructions according to claim 1, it is characterised in that: the opening angle of the fold is 65°。

3. a kind of steep-taper pipe end constructions according to claim 1 or 2, it is characterised in that: the fold is multiple, circumference Pipe end is set at equal intervals.

4. a kind of steep-taper pipe end constructions according to claim 1, it is characterised in that: the outer end depth of the fold is 1.5mm。

5. a kind of steep-taper pipe end constructions according to claim 1, it is characterised in that: the cylindrical tube is equipped with positioning Slot.