JPS63273516A - Producing equipment for flue body - Google Patents

Abstract

PURPOSE:To improve the production efficiency of a circular flue by supporting a rotary frame for bending a steel plate so that it can rotate horizontally and arranging a vertical holder for the steel plate approximately in the tangential direction of the rotary frame. CONSTITUTION:A long top steel plate P is stored between supporting frames 22 on a vertical holder 21 and forced in the tangential direction of the rotary frame R to fix the front end part of the steel plate P to be outermost side mast 9. Then, the rotary frame R is rotated to bend the steel plate P as it is wound around the external circumferential surface of an external circumferential ring 7. At this time, elastic force acts on the steel plate P in the external direction but is supported by a press roller 16 arranged on a fixing mast 13A and a connecting mast 15. Then, a supporting frame 27 is set on the fixing mast 13A to a required height and an enforcing ring 26 is dropped from above into the external circumferential surface of a pipe body K to be supported on the supporting frame 27. A wedge 28 is driven in between the outside of the external circumferential ring 7 and the inside of the pipe body K to expand the pipe body K in the external direction and to form the flue of set dimension.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for manufacturing flue pipe bodies in thermal power plants, chemical plants, etc.

(Prior Art) Traditionally, flue pipes used in piping installations in thermal power plants, chemical plants, etc. are individually formed into large-diameter pipes with diameters of several meters. These are successively butted against each other in the longitudinal direction and welded in a straight line, or against and welded against a large-diameter tube body for a curved portion whose end portion is cut diagonally.

To manufacture this round-shaped large-diameter tube, there is no steel plate with a length that matches the outer circumference of the tube, that is, the tube diameter, so conventionally, two or three steel plates were individually cut. After bending, the two pairs are butted together on the circumference, and reinforcing beams are formed on the inner circumferential surface and welded.

At that time, in order to bend individual steel plates, the bending process was carried out one by one using a dedicated bending machine with bending rollers arranged in a pyramid shape or a pinch shape.

(Problems to be solved by the invention) However, in the bending work of steel plates using a dedicated bending machine,
It is a difficult task to mold all of the curvature radii to the same precision, and it is a time-consuming task that requires repeated corrections.

Furthermore, it is extremely difficult to insert reinforcing beams into the inner circumferential surfaces of two or three sheets that butt together on the circumference, so labor-saving methods that can handle efficient bending work and welding work are extremely difficult. A means was needed.

(Means for Solving the Problems) Therefore, in the present invention, a flue is provided in which a rotary frame for bending a steel plate is horizontally rotatably supported, and a vertical stand for the steel plate is disposed in a substantially tangential direction of the rotary frame. In addition to the pipe manufacturing equipment,
A large number of masts are erected at appropriate intervals on the outer periphery of the rotating frame, and all or part of the masts constitutes a support frame that can freely adjust the mounting height of the pressing roller on the outer surface of the steel plate and the reinforcing ring. The company provided an apparatus for manufacturing a flue pipe body.

(Function) Therefore, the tip of a long steel plate, which has been formed in advance by splicing about two or three steel plates to have a length and an external shape commensurate with the pipe diameter, is placed against the rotating frame in the manufacturing apparatus of the present invention. By fixedly supporting the rotating frame in a vertical state and rotating the rotating frame to wrap a long steel plate around the rotating frame, the original long steel plate is bent into a cylindrical large diameter pipe. The body is held in a tubular structure in which the front end and the rear end are partially overlapped, and an annular ring with a reinforcing bar function is dropped from above onto the outer circumferential surface of the large diameter tubular body and is inserted and supported, By pushing the inside of the tube outward, abutting the tip and rear end of the tube at the overlapping part of the tube end, and welding this abutted part, a ring-shaped flue pipe can be created. We manufacture the body and use this to dramatically improve its work efficiency.

(Example) Reference numeral 1 denotes a base having a rectangular plate-like frame structure, and a rotary shaft 2 is erected and fixed approximately at the center of the base.

R is a rotating frame constituted by a cylindrical or polygonal tube-shaped framework, and a hollow shaft 3 formed at the center of the frame is inserted into and supported by the rotating shaft 2, thereby horizontally rotating the rotating frame R. It is designed to be movable.

4.4A is an upper radiation beam and a lower radiation beam with support beams extending in the radial direction on both upper and lower sides of the rotating frame R, and a disk-shaped mounting plate whose inner end is inserted and fixed to the hollow shaft 3; 5
It is fixedly supported.

6.BA is an inner connecting beam and an outer connecting beam arranged and fixed in a planar polygonal shape, and the adjacent radiation beam 4.4A
It is reinforced by extending it in the tangential direction. 7 is an annular outer ring fixed at the outermost position of the radiation beam 4.4A;
8. IIA is an inner mast and an outer mast with a support erected and fixed between the upper radiation beam 4 and the lower radiation beam 4A, 3
is the outermost mast in which a column is erected and fixed between outer circumferential rings 7. 10 is a large-diameter annular rotary pulley disposed at the lower end of the rotary frame R; 11 is a reinforcing radial rib of the rotary pulley 10 in which reinforcing beams are formed in the radial direction; The inner end thereof is fixedly supported by a disk-shaped mounting plate SA which is fitted and fixed to the lower end of the hollow rotating shaft 3.

Reference numeral 12 denotes a wheel that moves on the base 1, and a bearing is rotatably supported at the bottom of the lower radiation beam 4A of the rotating frame R. A fixed mast 13 has its lower end erected and fixed on the base 1, and is arranged and fixed at approximately equal intervals at concentric circles spaced appropriately from the outer peripheral ring 7 of the rotating frame cloud. Among these fixed masts 13, fixed masts 13 are located in the vicinity of the rotary frame R and the direction in which the vertical stand of the long steel plate P to be described later enters.
Normally, a connecting mast 15 is pivotally installed on A, which is fixedly supported in a vertical state by butting against the upper part of a fixed mast 13A, and if this is not necessary, it can be moved backward as shown in FIG. It is connected and supported by a connecting pin 14 so that it can be folded in two.

Reference numeral 15 denotes a pressing roller for a long steel plate P which is internally fixed inside the fixed mast 13A and the connecting mast 15, and is rotatably supported in the horizontal direction and presses and guides the outer peripheral surface of the steel plate P. 17 is a lower end guide of a pair of inner and outer steel plates P,
A base 1 supports a roller 18 so as to be freely rotatable by extending it between the pair of inner and outer lower end guides 17, and divides the roller 18 into approximately equal parts on the circumference between the outer ring 7 of the rotating frame R and the fixed mast 13.
It is placed above. 1g is a wire suspended and supported by a rotary pulley 10 of a rotary frame R, and the end of the wire 19 is connected and supported to a rotary drum 20 of a winch device W so that it can be wound freely.

Reference numeral 21 denotes a vertical stand for the steel plate P, which is disposed and supported on the base 1 in a substantially tangential direction of the outer ring 1 of the rotating frame R. 22
is a set of front and rear support frames, which are erected at appropriate intervals in the longitudinal direction, and the steel plates P are stored and set therein so as to be able to be pulled out in a propped state. 23 is a pair of front and rear steel plates P
The lower end guide supports a roller 24 by freely rotating it between the pair of lower end guides 23, and a large number of sets of rollers 24 are arranged at appropriate intervals at the bottom of the vertical stand 21 of the steel plate P. There is.

Thus, a long steel plate P is prepared by splicing about two or three steel plates in advance and forming the length and outer shape to match the pipe diameter.

It is inserted and stored between the support frames 22 of the vertical stand 21, pushed in the tangential direction of the rotating frame R, and then the tip of the long steel plate P is placed at the contact position. It is fixedly supported on the outermost mast 9 of a certain rotating frame R with a fastening metal fitting 25.

Then, when the winch device W is activated, the rotating frame R
rotates to gradually wrap and bend the long steel plate P along the outer circumferential surface of the outer ring 7. At this time, the rear side of the long steel plate P that is about to be bent has an elastic force that tries to bounce outward, but the fixed mast 1
3A and a pressing roller 15 disposed on its connecting mast 15 to press and support while rotating and guiding.

In this way, the rotary frame R is rotated by approximately -0.00000000000000000000000000000000000000000000000000000000000000000000000 rotation, and the original long steel plate P is bent into a cylindrical tube shape. Since the reinforcing ring 26, which is previously formed in an annular shape, is inserted and supported by dropping it from above, the tip of the tubular body is designed to have a slightly smaller diameter than the set dimension of the tubular body K, which is bent into a cylindrical shape. At the stage where the part and the end part partially overlap, tighten both the upper and lower ends of the pipe body with the fittings 25.
Tighten to secure.

Next, the support frame 27 of the reinforcing ring 26 is set on the fixed mast 13.13A at a predetermined height position, and the reinforcing ring 26 is dropped onto the outer circumferential surface of the tube body from above, and the support frame 27 is set on the fixed mast 13.13A.
Mount and support on top.

Then, for tightening, remove the metal fittings 25, butt the tip and end of the tube against the inner circumferential surface of the reinforcing ring 2B, and attach the outer circumferential surface of the tube to the inner circumferential surface of the reinforcing ring 2B. By driving a metal wedge piece 28 between the outer surface of the outer peripheral ring 7 and the inner peripheral surface of the tube body and pushing the tube body K outward, the tip and end portions of the tube body are separated. A flue pipe body of a set size is formed by butting together the pipes.

After that, the joints of the butt parts on the pipe bodies and the parts that are in close contact with the reinforcing ring 26 are welded, and the wedge piece 28 is extracted, and then it is separately pulled up with a crane and removed from the rotating frame R, and the wedge piece 28 is removed from the rotating frame R. A large number of large-diameter pipes are sequentially butt-welded on site to form the required flue pipe.

The support frame 27 of the reinforcing ring 26 has an L-shape as shown in FIG.
5 is supported by a connecting pin 30 on a height adjustment support plate 29 attached and fixed in advance, and is suspended toward the rear of multiple masts 13.13A and 15 when bending a long steel plate P. When the reinforcing ring 26 is supported at an appropriate height position, it functions as a shelf support.

(Effects of the Invention) As described above, the present invention first supports the rotary frame R for bending the steel plate P so as to be horizontally rotatable, and the steel plate P is placed vertically in the substantially tangential direction of the rotary frame R. Second, the flue pipe body manufacturing apparatus equipped with the stand 21 supports a rotary frame R for bending the steel plate P so as to be horizontally rotatable; A vertical stand 21 is arranged, and a large number of masts 13.13A are arranged at appropriate intervals on the outer periphery of the rotating frame R.

15 is erected, and all or a part of the mast 13.13A, 15 has a press roller 15 on the outer surface of the steel plate P and a support frame 27 that allows adjustment of the mounting height of the reinforcing ring 26. Since it is a manufacturing device for flue pipe bodies installed in thermal power plants, chemical plants, etc., it dramatically improves the work efficiency and significantly reduces the facility costs. Learn the effects of

[Brief explanation of the drawing]

Figure 1 is a plan view showing the overall outline of the flue pipe manufacturing equipment;
Figure 2 is a half-sectional front view of the manufacturing equipment, Figure 3 is a cross-sectional view of the vertical stand, and Figure 4 is the state in which the tip of a long steel plate is fixed to the outermost mast of the rotating frame with a metal fitting. and an enlarged plan view showing a state in which the rear end of the large-diameter tube is partially overlapped with its tip, and FIG. 5 shows the outer circumferential surface of the large-diameter tube with the tip and rear ends partially overlapped. Fig. 6 is a plan view showing a reinforcing ring fitted and supported; It is a figure which shows the state supported by the flexible support frame ζ square. Code Table R Rotating frame Pj14 plate W Winch K Tube 1 Base 2 Rotating shaft 3 Hollow shaft 4.4A Radiation beam 5.5A
Mounting plate 6.6A Connecting beam 7 Outer ring
8.8A Mast S Outermost mast 10 Rotating pulley 11 Radial lip 12 Rolling wheel 13.13A Fixed vX) 14.30 Connecting bin 1
5 Connecting mast 15 Pressing roller 17.23 Lower end guide 18.24 Roller 1g Wire 20
Rotating drum 21 Vertical stand 22.27 Support frame 2s Fastening with metal fittings 26 Reinforcement ring 28 Wedge piece
29 Support plate 12 7 17 18 13A

Claims (2)

[Claims] (1) A rotary frame R for bending the steel plate P is supported horizontally rotatably, and a vertical stand 2 for the steel plate P is placed approximately in the tangential direction of the rotary frame R.
1. A flue pipe body manufacturing device characterized in that: 1 is provided. (2) The rotary frame R for bending the steel plate P is supported horizontally rotatably, and the steel plate P is vertically placed in the substantially tangential direction of the rotary frame R.
1, a large number of masts 13, 13A, 15 are erected at appropriate intervals on the outer periphery of the rotating frame R, and all or part of the masts 13, 13A, 15 are covered with the outer surface of the steel plate P. A flue pipe manufacturing apparatus characterized by comprising a pressure roller 15 and a support frame 27 whose mounting height of a reinforcing ring 26 is adjustable.