JPH0478371B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing bent pipes, and in particular, an apparatus suitable for manufacturing panels of a group of heat exchanger tubes in a boiler by automatically and continuously performing panel processing operations according to control panel commands. Regarding.

Large industrial boilers, including boilers for power plants, have water tubes on the walls of the boiler, and heat transfer tubes are also placed in the flue to serve as energy savers, superheaters, reheaters, etc. Figures 1 and 2 show the economizer. The economizer 100 is placed in the flue of the boiler 101, and in order to improve heat recovery efficiency, the tube body is bent in many stages, and a plurality of bent tube bodies form one heat transfer panel. Furthermore, by arranging a large number of these heat transfer panels via headers or the like, an integrated energy saver is formed as a whole.
The number of bent tube bodies (coils) varies depending on the type of boiler, but the number can be as few as several hundred pieces, and as many as 1,000 or more pieces.

The details of the panel constituting the economizer will be explained in FIG. 2. One panel in the figure is a, b,
It is composed of three coils c. Looking at the structure of this coil for coil a, large-diameter bent portions a ₁ and small-diameter bent portions a ₂ are arranged alternately from the bottom, and a straight pipe portion is arranged between each bent portion, making the coil a single piece. It is said that Coil c is similarly constructed by alternately arranging large diameter bent portions and small diameter bent portions, and coil b has all bent portions medium diameter bent portions.
It is configured so that b ₁ . In this way, each coil has a different diameter of the bent part depending on the placement position, and the number of bent parts formed also differs depending on the installation position of the panel.
In addition, it takes a lot of effort and time to properly combine different coils using the support fittings 102 and the like to form a panel.

The outline of the coil manufacturing method is explained in order: (1) cutting one side of the straight pipe and forming a groove in the cut section, (2) bending the groove forming side, (3)
Cutting the opposite end of the bending process, forming a groove, (4) Arranging multiple processed pipes so that they can be welded together, (5) Welding each processed pipe together, (6) Assistance The metal fitting 102 is attached (see FIG. 2). In addition, in this manufacturing process, each welded part is inspected (AE, X-ray, etc.). Each of these steps (1) to (5) is performed by a machine such as a beveling machine or a pipe bender, but moving the pipe to the next process, setting the bending ratio of the pipe, positioning the processed pipe, etc. This is done manually and requires a huge amount of effort.

In addition, it is necessary to simultaneously process tubes of the same shape as much as possible to increase machining efficiency, so machining of other shapes is stopped until the machining of the same shape is completed. is stocked. As a result, a large number of processed pipes are stored, sometimes reaching several hundred pipes and requiring a large space. In this way, each shape of processed pipe is stocked, and welding is started after the stocking of all processed pipes is completed.
This requires a huge amount of storage space, and since machining is done in batches, equipment needed for other machining is idle while one machining is being carried out, which is uneconomical.

The present invention has been constructed in view of the above-mentioned problems, and provides an apparatus that can automatically and continuously form panels of various tube bodies constituting a group of heat transfer tubes, etc. in response to commands from a control panel (not shown). There is a particular thing.

In short, this invention provides a device that assembles a plurality of panels in which a straight pipe and a plurality of bent parts are located in one plane to form a single panel under automatic control, and is compatible with a plurality of straight pipe storage sections and bending radius types. a bevel processing device section that forms a bevel at both ends of the bent pipe; An assembly robot, multiple welding devices that weld these bent tubes into one panel, multiple inspection devices that perform inspection work including inspection of welded parts, a coil stock that stores the formed panels, and a plurality of welding devices that weld the bent pipes into one panel. This panel manufacturing apparatus is characterized by comprising a panel manufacturing section including a panel forming robot positioned in one plane for assembly, and a control device for performing assembly work using these devices.

Examples of the present invention will be described below.

FIG. 3 is a diagram conceptually showing the arrangement of each part of the device according to the present invention. In the figure, symbol A is the tube processing section, B is the processing tube arrangement section, C is the welding section, D is the inspection section, and E is the panel manufacturing section. Between these sections A to E, there is a conveyor that conveys the processed product. By connecting the two, the entire device is constructed as an integrated device. A control panel (not shown) is provided for issuing processing commands regarding work.

First, regarding the tube processing section A, reference numeral 1 denotes a tube stocker, 2 a groove forming machine that forms a bevel at the end of the tube supplied from this stocker, and 3 a tube that has completed groove formation. This is a multi-stage vertical stocker that stores a large number of tube bodies in the vertical direction, and is configured to store tube bodies of different lengths and diameters by type and supply the necessary tube bodies. 4 is a bender that bends the tubular body supplied from the stock 3, and is numerically controlled (NC).

FIG. 4 shows the concrete structure of the tube processing section, in which 1 is a stocker and a large number of tubes 103 are arranged. A groove forming machine 2 is attached to the stocker 1 to form a groove at one end of the tube 103 and adjust the tube to a required length. The tube bodies that have been processed in the first stage in this way are stored in predetermined grooves 3a of the multi-stage vertically stacked stocker 3 for each type. Storage in the grooves is done by appropriately operating the lid and pin (none of which are shown) formed at the upper end of each groove.
Close each lid and roll the tube until it reaches the designated groove.
At a predetermined groove, the lid is opened and a pin is set up to allow the tube to drop into the groove and be stocked. Next, supply the specified pipe body from the stocker 3 as necessary.
A bent portion is formed with a predetermined curvature by the NC bender 4.

In the processing pipe arrangement section B, conveyors 5a and 5b
A processed pipe with grooves and bent portions formed thereon is supplied. 7 is an assembly robot that arranges these processed tubes so as to form a single coil, and is able to move freely in the X and Y directions by a moving rail, and arranges the processed tubes on the conveyor 6. .

FIG. 5 shows the specific structure of the tube processing section A and the processing tube arrangement section. Note that the reference numeral 15 in the figure is the conveyor 5a.
This is a manipulator that transports processed pipes to. Further, each processed pipe placed at a predetermined position by the robot 7 is moved to the next welding part C in this placed state by a conveyor 6 serving as a roller stand. In some cases, the processed pipe placement portion B and the welding portion C may be integrally formed so that they can be welded on the spot after the arrangement is completed.

The welding section C shown in FIG. 3 is independent, and the welding device 8 performs butt welding of each processed tube to form an integral coil.

The quality of the integrally formed coil is inspected by an inspection device 9 in an inspection section D, focusing on the welded portion. This inspection is performed using methods such as ultrasonic flaw detection (AE) and X-ray flaw detection.

In the panel manufacturing department E, coils of various shapes, such as coils a, b, and c in FIG. 2, are stocked in a coil stocker 10 and supplied to a panel forming robot 11. Here, each coil is arranged so as to be able to form a panel, and in this state, supporting metal fittings are attached by the panel forming robot 11 to complete the panel.

FIG. 6 shows the operation of forming a panel using the apparatus according to the present invention, in which the pipe 103
One end is beveled 104 and bent to form processed pipes 105, each processed pipe 105 is arranged for coil formation, and each processed pipe is connected by back welding 106 to form an integral piece. A coil 107 is formed, and an inspection 108 is performed centering on the welded part 106. After that, a plurality of coils 107 are arranged and integrally formed with a support fitting 102, and a panel 109 is formed.
form.

By implementing this invention, pipe processing, coil formation, inspection, and panel formation can be performed automatically in a continuous process flow according to commands from the control panel, greatly reducing labor. can be reduced.

In addition, the equipment for each process is always in operation, so some equipment is not left idle, and there is no need to store large quantities of processed pipes, so a large space for stocking processed pipes can be eliminated. can.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a boiler, FIG. 2 is a perspective view of a panel constituting a group of boiler heat exchanger tubes, and FIG. 3 is a conceptual diagram showing the arrangement of the device according to the present invention.
Figure 4 is a perspective view of the stocker and pipe bender, Figure 5
The figure is a perspective view showing a specific example of the structure of the apparatus centering on the processing tube arrangement section, and FIG. 6 is a schematic diagram showing the working process by the apparatus of the present invention. 1...Stocker, 2...Bevel forming machine, 3...Multi-stage vertical stacker, 4...Pipe bender, 103...
... tube body, 105 ... processed pipe, 107 ... coil,
109... Panel, A... Pipe body processing section, B... Processed pipe arrangement section, C... Welding section, D... Inspection section, E...
...Panel production department.

Claims (1)

[Claims] 1 A device that assembles a plurality of panels in which a straight pipe and a plurality of bent parts are located in one plane to form one panel under automatic control is equipped with a plurality of straight pipe storage parts and a plurality of pipes corresponding to the bending radius type. A bender device section consisting of a bender, a beveling device section that forms bevels at both ends of the bent tube, and a plurality of assembly robots that arrange the tubes to form a plurality of types of panels. , multiple welding devices that weld these bent pipes into one panel, multiple inspection devices that perform inspection work including inspection of welded parts, a coil stocker that stores the formed panels, and a plurality of welding devices that weld the multiple panels into one panel. 1. A panel manufacturing device comprising: a panel manufacturing department including a panel forming robot located at a panel forming robot for assembly; and a control device for performing assembly work using these devices.