CN2041611U

CN2041611U - Baiting unit for steel pipe bend

Info

Publication number: CN2041611U
Application number: CN 87213245
Authority: CN
Inventors: 周贵岐
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-09-07
Filing date: 1987-09-07
Publication date: 1989-07-26

Abstract

The utility model provides a baiting unit for a steel pipe bend, comprising an angle meter, a ruler bar and fasteners. The utility model has the advantages of simple structure, low cost, convenient operation and time and material saving. One-time line drawing can be directly completed on the steel pipe by the utility model with exact line drawing. The baiting unit for a steel pipe bend is suitable for the steel pipe bends with various angles and pipe diameters.

Description

Baiting unit for steel pipe bend

The utility model relates to a kind of instrument, particularly a kind of steel elbow blanking device.

At present, general steel elbow blanking all according to metallurgical industry publishing house in May, 1986 publishes, Tang Shunqin shows that " practical plumber launches that handbook carries out.It is to make expanded view with picture on a ground paper, makes model behind the curve that draws, and then model is attached on the steel pipe, and along its setting-out on one side, can cuts steel pipe along the line.This baiting method complexity do a repeatedly setting-out of model, so error is big, not only waste material but also lose time, and also a model only is applicable to the steel elbow of doing an a kind of caliber of angle.

Task of the present utility model is that a kind of steel elbow blanking device will be provided, and it can be applicable to the steel elbow of doing various angles and various calibers, and can a direct setting-out finish on steel pipe with it.

The utility model is finished as follows: a securing member is installed in the center of a protractor, and other has a chi bar and several securing member, and all securing members are used for degree of tightness chi bar.During use, at first draw a center line at its length direction of steel pipe upper edge, hold out against the middle part of chi bar with the securing member on the protractor, make base or the alignment parallel of protractor with one side of chi bar, on the center line on the central point aligning steel pipe of protractor, and according to needed angle, the amount of spin hornwork, make 90 ° of lines of protractor depart from center line on the steel pipe to certain angle, steel pipe is close to around to the opposite in the two ends of chi bar, and,, can cut steel pipe by line in one side setting-out of steel pipe upper edge chi bar holding out against with one or several securing member behind the overlap joint of the two ends of chi bar.

In such scheme, in order to be close to steel pipe in the both sides that make the chi bar, and guarantee attractive in appearance and accuracy setting-out, available two chi bars.These two chi bars are complete symmetries, and its two ends are rectilinear, and middle one section be arc.When the chi bar with certain angle during around steel pipe, the chi bar is closed into elliptical shape, and all can be close on the steel pipe on the both sides of each position chi bar of ellipse.This moment, the summit of chi bar arch section should be on long axis of ellipse.In order to aim at oval summit, on the chi bar scale is arranged.During use, at first at steel pipe upper edge steel pipe length direction 1/4th places of steel pipe circumference, two center lines that draw of being separated by.Again according to required angle, determine the lap of splice of two chi bars, and the overlap joint back holds out against with the securing member on the protractor, also can hold out against the end of lap-joint's chi bar again with a securing member, the other end of two chi bars respectively with oppositely around opposite to steel pipe, and their overlap joint backs are held out against with one or several securing member.At this moment, the chi bar is closed into elliptical shape, and a summit on its major axis and the minor axis is dropped on respectively on two center lines on the steel pipe.When the different cutting angle of needs, the amount of spin hornwork comes the drift angle of center line on 90 ° of lines of adjustment amount hornwork and the steel pipe to get final product.And the steel pipe caliber changes two chi bar two ends laps of splice and gets final product not simultaneously.

The utility model is simple in structure, and is easy to use, uses its accurately setting-out.With it can be directly on steel pipe once setting-out finish, and it is applicable to the steel elbow of doing various angles and various calibers, also is applicable to do and pulls out shape and oval elbow slightly.

Below with reference to implementing illustration the utility model is described in further detail.

Fig. 1 is the schematic diagram of the utility model when practicality.

Fig. 2 is the plane of chi bar.

Fig. 3 is the structural representation of fixation clamp.

Fig. 4 is the schematic diagram of protractor and fixation clamp.

With reference to Fig. 1, at the fixedly connected fixation clamp in the center of protractor (3) (2), fixation clamp (2) is made up of a U-shaped clamp and wing screw.Also have the chi bar (1) of two symmetries, their two ends are rectilinear, and middle one section be arc.The central angle of this section arc is 23 degree, and inside radius is 420 millimeters.Chi bar (1) is made with the corrosion resistant plate of 1 millimeters thick, 15 mm wides, and on chi bar (1) scale is arranged, so that determine the lap of splice of two chi bars (1).Protractor (3) and fixation clamp (2) are preferably all manufactured with stainless steel.During use, caliber and needed angle according to steel pipe, determine the lap of splice of two chi bars (1), the overlap joint center holds out against with the fixation clamp (2) on the protractor (3), hold out against the end of lap-joint's chi bar (1) with another fixation clamp (2), in order to avoid it sticks up, at this moment, the base of protractor (3) is concordant with one side of chi bar (1); The central point of protractor (3) is aimed on the center line on the steel pipe (4), and amount of spin hornwork (3) makes its 90 ° of lines depart from center line on the steel pipe to needed angle; The other end of two chi bars (1) is close to steel pipe in the opposite direction around to the opposite, and the overlap joint back holds out against with two fixation clamps (2).Like this, just can go up setting-out at steel pipe (4), and can cut steel pipe (4) by this line along one side of chi bar (1).When needed angle not simultaneously, rotatable protractor (3) is adjusted, and for the steel pipe of different tube diameters, the lap of splice that only changes two chi bars (1) gets final product.If when steel pipe caliber change of rank is excessive, can use another set of chi bar instead.

Claims

1, a kind of steel elbow blanking device is characterized in that it has a protractor (3), one or two chi bar (1) and several to be used for the securing member (2) of degree of tightness chi bar (1), and one of them securing member (2) is fixedly connected on the center of protractor (3).

2, by the described steel elbow blanking device of claim 1, the two ends that it is characterized in that chi bar (1) are rectilinear, and middle one section be arc.

3, by the described steel elbow blanking device of claim 2, it is characterized in that on the chi bar (1) scale being arranged.