CN1832282A

CN1832282A - Method of bending tube with large bending radius

Info

Publication number: CN1832282A
Application number: CNA2006100349037A
Authority: CN
Inventors: 许军
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-11
Filing date: 2006-04-11
Publication date: 2006-09-13
Also published as: CN101427433A; CN101427433B; GB2450851B; GB2450851A; WO2007115508A1; GB0820607D0

Abstract

This invention relates to a method for realizing elbow pipes with large curvature radius when fitting pipes for electric construction including: first of all, a pipe turns in great curvature radius along the floor to a cross place of the floor and the wall, then turns in large curvature radius along the wall, in which, the two turns are tangent smoothly at the connecting point, the angle among the cross lines of the tangent, the floor and the wall should be small enough to meet the offset limit of the wall and floor to the pipe on the direction vertical to the floor and the wall and the tangent and the cross line should be parallel at the extreme situation when the two offset distances are zero.

Description

Method of bending tube with large bending radius

Technical field the present invention relates to a kind of method that realizes long radius elbow when the architectural electricity pipe arrangement.

Background technology is present, and in the national standard of architectural electricity pipe arrangement, the requirement of the minimum bending radius of dark pipe arrangement is not less than 6 times of pipe arrangement caliber, is preferably in more than 10 times.But, in actual engineering practice, when pipe turns between floor and body of wall, or when body of wall turns to another body of wall that intersects certain angle (commonly 90 degree) with it, because pipe (is comprising the crossbeam that is attached thereto with floor or body of wall, if present, down together) deflection of the direction of Surface Vertical is subjected to the restriction of floor or thickness of wall body, by existing bending method, realize that the bending radius of pipe arrangement caliber is very difficult more than 6 times even 10 times, in many cases, or even unpractical.

In Fig. 1, all the intersection with floor and metope is vertical before and after turning in the axis of pipe, and a and b are respectively pipes in the maximum deviation of allowing with the floor direction vertical with surface of wall.So, when pipe directly turned to body of wall B from floor A, the maximum radius of turn R that can realize was determined by following formula:

R＝r+D/2；

r ²=(r-a) ²+ (r-b) ²(r 〉=a wherein, r 〉=b)

On the other hand, from the angle of distribution, bending radius is big more, passes that cable in the electric pipe arrangement is easy more to be laid and change, and the damage that cable is subjected to when laying is also littler.

Summary of the invention bending method provided by the present invention can solve because the thickness limits of floor and body of wall can't realize the problem of long radius elbow.Technical scheme of the present invention is: pipe is done earlier the turning of macrobending radius along floor (not exceeding the locus restriction of floor to pipe), does the turning of macrobending radius to floor and the body of wall intersection location again along body of wall (not exceeding the locus restriction of body of wall to pipe).Bend at the phase contact for these two and want level and smooth tangent connection.Angle between the intersection of tangent line and floor and metope should be enough little, with satisfy floor and body of wall to pipe perpendicular to the bias limitations on floor and the wall direction.All be that tangent line should be parallel with intersection under zero the extreme case at these two deviation distances.

The bend pipe bending radius that realizes by the present invention no longer be subjected to floor and body of wall to pipe in restriction perpendicular to the deviation distance on floor and the wall direction.

Above method is equally applicable to pipe between body of wall and the body of wall, between ground and the body of wall, and the turning of bright tubulature.

The present invention is further described below in conjunction with accompanying drawing for description of drawings

Fig. 1 is the bending method schematic diagram of present electric pipe arrangement

Fig. 2 is a kind of example schematic (stereogram) of embodiment of the present invention

Fig. 3 is the three-view diagram of above-mentioned example

Fig. 4 is the three-view diagram of another kind of embodiment

Among the figure, the A. floor, the B. body of wall, the D. caliber, the R. bending radius, a. pipe in floor with the maximum permissible deviation distance of floor vertical direction, the b. pipe in body of wall with the maximum permissible deviation distance of metope vertical direction.

The embodiment embodiments of the present invention have two kinds: 1, utilize mould to produce the long radius elbow of different size model in batches; 2, utilize angle pipe equipment (as the bend pipe spring) to be processed into long radius elbow or the part of pipe is processed into long radius elbow.

In Fig. 3 and Fig. 4 example, the radius of curvature R of whole Curved Continuous and maximum permissible deviation are irrelevant apart from a and b.When implementing, can freely select radius of curvature R as required.

Claims

1. the bending method of a macrobending radius that when the architectural electricity pipe arrangement, uses, it is characterized in that: pipe is between floor and body of wall during break-in, do earlier the turning of macrobending radius, do the turning of macrobending radius to floor and the body of wall intersection location again along body of wall (not exceeding the locus restriction of body of wall) pipe along floor (not exceeding the locus restriction of floor) to pipe.

2. bending method according to claim 1, it is characterized in that: along the turning of the macrobending radius of floor with along the turning of the macrobending radius of body of wall in the level and smooth tangent connection of contact mutually, angle between the intersection between tangent line and floor and the metope should be enough little, with satisfy floor and body of wall to pipe perpendicular to the bias limitations on floor and the wall direction, all be that tangent line should be parallel with intersection under zero the extreme case at these two deviation distances.

3. bending method according to claim 1 is characterized in that: the bending radius of bend pipe is being limited perpendicular to the deviation distance on floor and the wall direction pipe by floor and body of wall no longer.