CN203330637U

CN203330637U - Circle forming tool

Info

Publication number: CN203330637U
Application number: CN2013204190769U
Authority: CN
Inventors: 徐健; 张娈
Original assignee: ZHANGJIAGANG HAILU JULI HEAVY EQUIPMENT Co Ltd
Current assignee: ZHANGJIAGANG HAILU JULI HEAVY EQUIPMENT Co Ltd
Priority date: 2013-07-15
Filing date: 2013-07-15
Publication date: 2013-12-11
Anticipated expiration: 2023-07-15

Abstract

The utility model discloses a circle forming tool with the size adjusted freely. The circle forming tool is composed of an upper part and a lower part. The upper part and the lower part respectively comprise two screw rods, wherein the screwing directions of threads at the two ends of each screw rod are opposite. The two ends of each screw rod are respectively connected with a nut in a threaded mode. The end portion of each nut is connected with a supporting rib plate attached to the inner surface of a straight pipe barrel or a conical pipe barrel needing to be expanded to be a circle. Each screw rod is horizontally arranged, the center of each screw rod is arranged on the center line of the straight pipe barrel or the conical pipe barrel needing to be expanded to be the circle, and the included angle between the space of the two screw rods of the upper part and the space of the two screw rods of the lower part of the circle forming tool is a right angle. The upper part of the circle forming tool can be adjusted between 685mm and 1025mm, and the lower part of the circle forming tool can be adjusted between 1440m and 2000mm. The circle forming tool can be provided with two parts of adjustable ranges, so that the circle forming tool can be adjusted freely to adapt to different-size straight pipe barrels or conical pipe barrels needing to be expanded to be a circle.

Description

Hold round frock

Technical field

The utility model relates to a kind of frock that holds round.

Background technology

When carrying out the cylinder weldings such as pressure vessel, bell-type heated shell, because its diameter is large, wall thickness, rigidity be little, need to control with some anti-deformation tools dimensional accuracy and the form and position tolerance of postwelding product, what routine was used is outer garter spring or internal overarm support frock.Outer garter spring is the monolithic annulus or is bolted and is formed by two 1/2 annulus, only from outside, cylindrical shell circumferentially is fixed, and the local contraction of commissure is difficult to control, and the circularity after the chucking cylinder body outer wall is regulated does not often reach desirable effect; The internal overarm support frock of crux more commonly used is to be spliced by rod members such as shaped steel, relies on the cylinder inboard wall that what time is clamped on cross hairs, can only the circularity to cylindrical shell be regulated from part.Generally holding round frock is all directly contact or even weld with equipment, and can only be used in the equipment of fixed diameter.Equipment and materials great majority in nitric acid plant are all that stainless steel and appts wall thickness rate are thinner, higher for the protection requirement of stainless steel surfaces.Therefore in holding round the process of frock, Equip-ment manufacture and installation there will be following problem:

1, the equipment wall thickness is thinner, and after setting holds round frock, appts wall easily is out of shape.

2, equipment holds round frock and uses stainless steel material, and is necessary for the frock that holds round of each device fabrication correspondingly-sized, and cost is higher, and causes waste.

The utility model content

Technical problem to be solved in the utility model is: provide a kind of and be difficult for making the equipment distortion and can reusablely hold round frock.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the described frock that holds round consists of upper and lower two parts, upper and lower two parts comprise respectively two horizontal directions arrange and the contrary screw rod of two ends thread rotary orientation, the two ends of the screw rod nut that has been threaded respectively, the end of described nut is connected with respectively a bearing rib with the laminating of the Straight that need hold round or conical shell inner surface, and the center of every screw rod all is positioned on the center line of the Straight that need hold round or conical shell.

As a kind of a kind of optimal way that holds round frock of the utility model, the end of described each nut is provided with jaw, and each nut connects by jaw respectively with corresponding bearing rib.

As a kind of a kind of optimal way that holds round frock of the utility model, the described angle that holds round upper and lower two-part two screw rods of frock is set and is right angle.

As a kind of further improvement that holds round frock of the utility model, the position of the Straight held round with need on described bearing rib or conical shell laminating arranges rubber blanket.

As a kind of a kind of optimal way that holds round frock of the utility model, the described frock top adjustable extent that holds round is 685mm-1025mm, and the bottom adjustable extent is 1440mm-2000mm.

As a kind of further improvement that holds round frock of the utility model, described bearing rib is shaped as right-angled trapezium, hypotenuse and the conical shell inner surface laminating that need hold round.

The beneficial effects of the utility model are: hold round frock and be comprised of upper and lower two parts, two-part adjustable extent can be set respectively, free adjustment makes in its Straight that is applied to different size or conical shell equipment.The setting of bearing rib makes Straight or the stressed place of the conical shell strength increase that need hold round, not yielding.With the position of Straight or conical shell laminating, rubber blanket is set on bearing rib in addition, can protects Straight or the conical shell inner surface that need hold round not to need to hold round the gusset scuffing.

The accompanying drawing explanation

Fig. 1 is the structure chart that the utility model holds round frock;

Fig. 2 is the top view of Fig. 1;

In figure: 1, screw rod on first, screw rod on 2, second, 3, first time screw rod, 4, second time screw rod, 5, rubber blanket, the 11, first bearing rib, the 12, second bearing rib, the 21, first left-handed nut, the 31, first right-handed nut.

The specific embodiment

Below in conjunction with accompanying drawing, describe specific embodiments of the present utility model in detail.

Fig. 1 and Fig. 2 are in conjunction with being depicted as a kind of frock that holds round described in the utility model, and this frock can be for being held round Straight or conical shell.Hold round frock and be divided into upper and lower two parts, upper and lower two parts comprise respectively two screw rods that the two ends thread rotary orientation is contrary, be specially: top comprises two screw rods that the two ends thread rotary orientation is contrary---screw rod 2 on screw rod 1 and second on first, and bottom comprises two screw rods that the two ends thread rotary orientation is contrary---first time screw rod 3 and first time screw rod 4.On first, the left end screw thread of screw rod 1 is left-handed, and this end right-hand member screw thread of screw rod 1 on the first left-handed nut 21, the first that has been threaded is dextrorotation, and this end first right-handed nut 31 that has been threaded.One end of the first left-handed nut 21 is provided with jaw, and the clamping of this jaw have one with the first bearing rib 11, the first right-handed nuts 31 of the Straight that need hold round or the laminating of conical shell inner surface an end also be provided with jaw and this jaw also clamps second bearing rib 12 of fitting with the Straight that need hold round or conical shell inner surface.As depicted in figs. 1 and 2, screw rod 2 on second, first time screw rod 3 and first time screw rod 4 respectively with the connected mode of corresponding separately nut and bearing rib, consistent with the connected mode of screw rod on first 1 and corresponding nut and bearing rib.

On first on screw rod 1, second screw rod 2, first time screw rod 3 and second time screw rod 4 all be set to horizontal direction, and on first on screw rod 1, second center of screw rod 2, first time screw rod 3 and second time screw rod 4 all be positioned on the center line of the Straight that need hold round or conical shell.

On first on screw rod 1 and second angle of screw rod 2 be right angle, the angle of first time screw rod 3 and second time screw rod 4 is right angle, this set makes Straight or the conical shell that need hold round stressed more balanced.

The position of the Straight held round with need on each bearing rib or conical shell laminating arranges rubber blanket 5, and this set makes the Straight that need hold round or conical shell surface can not be held round gusset and scratches.

When the cylindrical shell held round when need is taper, holding round frock top adjustable extent is 685mm-1025mm, and the bottom adjustable extent is 1440mm-2000mm.

When the cylindrical shell held round when need is taper, bearing rib is shaped as right-angled trapezium, hypotenuse and the conical shell inner surface laminating that need hold round.

Owing to holding round, the upper and lower two-part occupation mode of frock is identical, specific embodiments will take hold round frock top first on screw rod 1 and the corresponding nut connected and bearing rib the course of work that holds round of conical shell is elaborated as example: at first rotation hold round the frock bottom first on screw rod 1, make the first left-handed nut 21 and the first right-handed nut 31 synchronously along the segment distance that moves of the direction near screw rod 1 center on first, make the distance between the first bearing rib 11 and the second bearing rib 12 be less than the diameter that conical shell need hold round place.Then the rubber blanket 5 laminating conical shells on the first bearing rib 11 hypotenuses need be held round to the inner surface at place, the first left-handed nut 21, the first bearing rib 11 and the conical shell that need hold round keep relative static, screw rod 1 in rotation first, the rubber blanket 5 on the second bearing rib 12 hypotenuses and conical shell make the first right-handed nut 31 along the direction rectilinear motion away from screw rod 1 center on first, until need hold round the inner surface laminating at place.When the elasticity of the cylinder material held round when need is larger, the distance between the first bearing rib 11 and the second bearing rib 12 also should be slightly larger than the diameter that conical shell need hold round place, just can make the springback capacity of cylindrical shell meet the required precision that conical shell need hold round place's diameter.

Also can at first rotate hold round frock top first on screw rod 1, make the first left-handed nut 21 and the first right-handed nut 31 synchronously along direction rectilinear motion one segment distance at screw rod 1 center on close first, make the distance between the first bearing rib 11 and the second bearing rib 12 be less than the diameter that conical shell need hold round place.Then screw rod 1 on first is inserted to conical shell and need hold round place, and on first on the center line that is centered close to the conical shell that need hold round of screw rod 1.Screw rod 1 in rotation first, the first bearing rib 11 and the second bearing rib 12 make the first left-handed nut 21 and the first right-handed nut 31 synchronously along direction rectilinear motion one segment distance away from screw rod 1 center on first, until need hold round respectively the inner surface laminating at place with conical shell.

Hold round frock top second on screw rod 2 and corresponding nut and bearing rib, the course of work of the conical shell that need are held round is identical with the above-mentioned course of work, no longer repeat specification.Hold round the technical scheme that conical shell that the frock top and the bottom hold round need holds round consistent, the course of work that holds round the frock bottom is identical with the above-mentioned top course of work, also no longer repeat specification.When the cylindrical shell held round when need is taper, the scope held round between frock top the first bearing rib 11 and the second bearing rib 12 is 685mm-1025mm, and the bottom adjustable extent is 1440mm-2000mm.

The beneficial effect that the utility model holds round frock is: hold round frock and be comprised of upper and lower two parts, two-part adjustable extent can be set respectively, free adjustment makes in its Straight that is applied to different size or conical shell equipment.The setting of bearing rib makes Straight or the stressed place of the conical shell strength increase that need hold round, not yielding.On bearing rib and equipment contact-making surface, rubber blanket is set in addition, can protects Straight or the conical shell inner surface that need hold round not to need to hold round the gusset scuffing.

Claims

1. one kind holds round frock, it is characterized in that, the described frock that holds round consists of upper and lower two parts, upper and lower two parts comprise respectively two horizontal directions arrange and the contrary screw rod of two ends thread rotary orientation, the two ends of the screw rod nut that has been threaded respectively, the end of described nut is connected with respectively a bearing rib with the laminating of the Straight that need hold round or conical shell inner surface, on the Straight that being centered close to of every screw rod need hold round or the center line of conical shell.

2. the frock that holds round according to claim 1, is characterized in that, an end of described nut is respectively arranged with jaw, between nut and corresponding bearing rib, by jaw, connects.

3. the frock that holds round according to claim 2, is characterized in that, the angle between described two screw rods that hold round in the frock upper and lower is right angle.

4. the frock that holds round according to claim 3, is characterized in that, the position of the Straight held round with need on described bearing rib or conical shell laminating arranges rubber blanket.

5. the frock that holds round according to claim 4, is characterized in that, the described frock top adjustable extent that holds round is 685mm-1025mm, and the bottom adjustable extent is 1440mm-2000mm.

6. the frock that holds round according to claim 5, is characterized in that, described bearing rib is shaped as right-angled trapezium, hypotenuse and the conical shell inner surface laminating that need hold round.