CN201628026U

CN201628026U - Thin-wall steel tube rolling-type connecting structure

Info

Publication number: CN201628026U
Application number: CN2010201529857U
Authority: CN
Inventors: 甘毅; 周云宽; 甘志宏
Original assignee: 甘毅
Current assignee: Shenzhen Yuanshun Pipe Industry Co. Ltd.
Priority date: 2010-04-08
Filing date: 2010-04-08
Publication date: 2010-11-10
Anticipated expiration: 2020-04-08

Abstract

The utility model discloses a thin-wall steel tube rolling-type connecting structure comprising a pipe fitting, a pipe material and a sealing ring, wherein the sealing ring is arranged between the connecting parts of the pipe fitting and the pipe material; the connecting parts of the pipe fitting and the pipe material are deformed by the rolling of a pressure wheel to be occluded and enclasped. The connecting structure adopts rolling-type connection to conduct rolling connection on the compression-type pipe fitting and the pipe material, and changes the die extrusion in the prior art into rolling, the static extrusion into dynamic rolling, the whole simultaneous extrusion into local circulating rolling and the forced extrusion deformation into gradual contraction distortion, and the extrusion section shape of the connecting part to be annular from polygon, thus solving the technical problem existed in the practical application of the compression-type connection for a long time and the problem of poor maintainability, leading the connection of the thin-wall steel tube in the practical application construction process to be more reliable and the installation thereof to be simpler, and being applicable to the connection of pipeline systems of thin-wall stainless steel pipelines and thin-wall steel pipes, used for conveying low-pressure liquid and having different grade requirements of 1.6MP-2.5MPa in all the industries.

Description

Thin-wall steel tube roll squeezing type linkage structure

Technical field

The utility model belongs to a kind of thin-wall steel tube roll squeezing type linkage structure.

Background technique

At present international and domestic in low-pressure fluid is carried with the pipe-line system of thin-walled stainless steel tube the Placement of tubing and pipe fitting be mechanical connection manner except that the common employing of welding, in many mechanical connection manners, it is that low-pressure fluid is carried the main Placement with the thin-walled stainless steel tube pipe-line system that clamp-press type connects: press its shape difference of back though clamp-press type connects card, but the card that they adopt presses means identical, that is: being connected of pipe fitting and tubing all is to rely on mould and the powerful external force that acts on the mould that pipe fitting in the mould and tubing are forced extrusion-deformation simultaneously along garden week integral body, by extrusion-deformation, make the mutual interlock of pipe fitting and tubing, while also makes pipe fitting embrace tubing tightly or tubing is embraced pipe fitting tightly, realizes the connection that it is mutual.Mainly there is following problem in this Placement in actual applying:

1, construction tool complexity, heaviness, cost height: because clamp-press type connects is to rely on mould, under static state with powerful external force, connection part with pipe fitting in the mould and tubing, whole pressure extrusion-deformation, obtain mutual connection, so satisfy above-mentioned requirements, construction tool is just had higher requirement, correspondingly construction tool is also just complicated, heavy, cost is high.

2, maintainalbility is poor: because the clamp-press type connection is that the pattern tool is disposable pipe fitting and tubing are forced extrusion-deformation simultaneously, realize its interconnective a kind of mode, therefore after having connected higher connection reliability need be arranged, in actual applications because of the wearing and tearing of mould, the decline of pressure facility pressure, the influence of factors such as installation exercise personnel sense of responsibility, can cause card to press the decline of quality, thereby bury the hidden danger of leaking, and this hidden danger of leaking is after finding, the card pressure is just relatively more difficult once more, even if after repairing well, also can bury the hidden danger of leaking.What adopt at present is the method for directly changing.

3, Shi Gong suitable condition is wide inadequately: in the work progress of reality since clamp-press type connect, connection part belongs to dead relatively Placement, rotation angle is less mutually, at the construction field (site), as: place, position, etc. under the situation of condition restriction, because of real should condition can the making troubles to construction and installation inadequately of constructing, even can influence the reliability of connection and bury the hidden danger of leaking.

4, the degree of dependence to installation exercise personnel sense of responsibility is bigger.

The model utility content

The utility model provides a kind of thin-wall steel tube roll squeezing type linkage structure, and it can effectively overcome the existing existing shortcoming of clamp-press type interconnection technique.

The purpose of this utility model realizes by following technical solution:

A kind of thin-wall steel tube roll squeezing type linkage structure has pipe fitting, tubing and seal ring, it is characterized in that: be provided with seal ring between pipe fitting and tubing connection part, the connection part pressurized wheels roll extrusion of pipe fitting and tubing deforms to interlock and holds tightly.

The roller finder that described pressure wheel selection and pipe fitting and tubing connection part adapt.

This thin-wall steel tube roll squeezing type linkage structure that the utility model provides, adopting the roll squeezing type connection that clamp-press type pipe and tubing are carried out roll extrusion is connected, change the extruding of prior art pattern tool into roll extrusion, static extruding changes dynamic roll extrusion into, integral body is pushed simultaneously and is changed the local circulation roll extrusion into, force extrusion-deformation to change contraction deformation gradually into, the extruding section configuration of connection part changes annular into by polygonal.Because connecting, roll squeezing type changed the connection means that the clamp-press type connection is adopted, connect the permanent in actual applications technical barrier that exists and the problem of maintenance difference thereby solved clamp-press type, make the connection of thin-wall stainless steel in the practical application work progress more reliable, install easier.Be applicable to every profession and trade: the low-pressure fluid that the 1.6MP-2.5MPa different brackets requires is carried being connected with the pipe-line system of thin-walled stainless steel tube and thin-wall steel tube.

Description of drawings

Fig. 1 is that four kinds of roll squeezing types of the present utility model connect employed pipe fitting interface shape and structure schematic representation, respectively shown in Fig. 1-a, 1-b, 1-c, 1-d.

Fig. 2 is four kinds of pipe fitting interfaces shown in Figure 1 and tubing Connecting format schematic representation, respectively shown in Fig. 2-a, 2-b, 2-c, 2-d.

Fig. 3 is four kinds of pipe fitting interfaces shown in Figure 2 and schematic representation before tubing carries out roll extrusion and is connected, respectively shown in Fig. 3-a, 3-b, 3-c, 3-d.

Fig. 4 is four kinds of pipe fitting interfaces shown in Figure 2 and schematic representation after tube rolling press is connected, respectively shown in Fig. 4-a, 4-b, 4-c, 4-d.

Fig. 5 is the section configuration figure after roll extrusion connects.

Fig. 6 is that the pipe fitting interface carries out the schematic diagram that roll extrusion is connected with tubing.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

The utility model is selected the roller finder that adapts with the pipe fitting interface shape according to four kinds of difform pipe fittings and tubing Connecting format, it is pipe fitting and the tubing that connects based on clamp-press type that roll squeezing type connects, with the form that does not change clamp-press type pipe and tubing is prerequisite, carries out roll extrusion with three roller roller finders and connects.Between pipe fitting 1 and tubing 3 connection parts, be provided with seal ring 2, when carrying out roll extrusion and connecting along the circumferential direction, take the to circulate method of roll extrusion, little by little shrink the external diameter of pipe fitting and tubing, make the pipe fitting external diameter of contraction deformation and contraction deformation the mutual interlock of tube outer diameter, hold tightly, realize mutual connection.In the roller: pressure wheel 4 is a drive roller, and pressure-bearing wheel 5 is passive roller, wherein one of pressure wheel, two on pressure-bearing wheel.

When roll extrusion connects, the connection part of pipe fitting and tubing is put into three roller rollers, adopt the manually rolling limit, method limit of pressurization pressurization gradually, till making pipe fitting and tubing deformed by the position of roll extrusion to hold tightly to interlock.

Claims

1. a thin-wall steel tube roll squeezing type linkage structure has pipe fitting, tubing and seal ring, it is characterized in that: be provided with seal ring between pipe fitting and tubing connection part, the connection part pressurized wheels roll extrusion of pipe fitting and tubing deforms to interlock and holds tightly.

2. thin-wall steel tube roll squeezing type linkage structure as claimed in claim 1 is characterized in that: the roller finder that pressure wheel selection and pipe fitting and tubing connection part adapt.