JP2007222898A - Device for treating bead chip on inner surface of electric welded steel tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical device for treating bead chips on an inner surface which is free from any trouble. <P>SOLUTION: The device comprises a tube-receiving stand 13 for horizontally holding a plurality of electric welded steel tubes P with one end thereof aligned, a blow header 11 for blowing off bead scraps S inside, an oscillating conveyor 17 for collecting the bead scraps S to a center and transferring them, a crushing means 18 for crushing the bead scraps S to be short, and a chip conveyor 19 for conveying out crushed chips C. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a processing device for bead scraps that are generated when an inner surface of a bulge generated in a bead portion on an inner and outer surface after welding is removed by cutting in a manufacturing process of an ERW steel pipe.

In the manufacturing process of the electric resistance welded steel pipe, the welded portion is pressurized with a squeeze roll immediately after welding, so that a raised portion is generated in the bead portion on the inner and outer surfaces. Although this is removed by cutting, since the bead scrap is long in a string shape, the bead scrap is cut into short pieces and collected in a bag and reused as scrap.
Although Patent Document 1 relating to the applicant's application is currently unpublished, the [Background Art] section includes:
“The inner bead of the ERW steel pipe is cut with a bead cutter when the ERW steel pipe is formed, and the bead waste remains on the inner surface of the pipe and is transported with the steel pipe, and blown and removed from the end of the pipe on the intermediate table by a blower. "
There is a description.

  First, an example of the layout of the ERW steel pipe manufacturing factory will be described with reference to FIG. 91 is an uncoiler for rewinding the steel strip H, 92 is a looper for storing the rewinded steel strip H, 93 is a molding machine comprising a forming roll and welding means for bending the steel strip H into a tubular shape, a squeeze roll for pressing and pressing the steel strip H, etc. (Piping machine), 94 is a cutting machine that cuts the formed ERW steel pipe into a predetermined length, 95 is an intermediate table, and P1 is an ERW steel pipe on the intermediate table.

  Previously, products were manufactured at this stage, but it was necessary to prepare various types of rolls for the molding machine in response to diversification of product dimensions, and the work was complicated if the processing conditions differed for each product. Therefore, in recent years, in the molding stage, intermediate products that are long as few as possible are manufactured, and various products are manufactured by reworking them. The following is the rework line, 96 is a heating device such as high frequency that reheats the intermediate product P1, 97 is a reducer that reprocesses to a predetermined size, 98 is a hot saw that cuts it hot, 99 is the product to cool It is a cooling bed.

  The internal bead is removed by cutting by pressing the blade against the raised portion of the bead during pipe making in the molding machine, but the generated bead-like scraps remain inside the steel pipe. There are two ways to take this out from the ERW steel pipe P1 which is an intermediate product in the intermediate table 95 or from the ERW steel pipe P2 which is a product in the cooling bed 99. Alternatively, a mixture of air and water is blown to blow off the bead waste to the opposite side.

For the string-like bead scraps that have been blown off, the tip is pulled with a pinch roll to guide it to the bead cutter, where it is cut into chips and collected in a bag, or as it is in a deep pit. Dropping, cutting and compressing with a hydraulic press to form a lump and recovering has been performed.
However, as for the method of pulling with a pinch roll, if bead scraps are entangled before and after the pinch roll, the feed to the bead cutter may not be performed successfully. There is a problem that the apparatus becomes larger in the width direction and becomes larger.

In addition, in the pit drop method, for example, it is necessary to construct a deep pit with a depth of about 5 m, so the construction cost is high, and a hydraulic scrap press with two longitudinal and lateral rams installed at the bottom of the pit is very expensive. There is an economic problem.
Japanese Patent Application No. 2005-191270

  An object of the present invention is to solve the above-mentioned problems in conventional bead scrap processing and to realize a highly reliable and economical inner surface bead scrap processing apparatus.

  The present invention provides a pipe cradle for holding an electric resistance steel pipe cut to a predetermined length at a predetermined height and having a predetermined position at a predetermined height, and a nozzle in the electric resistance steel pipe held by the pipe cradle. A blow header that inserts and blows away internal bead waste, a vibration conveyor that transports the blown bead waste while collecting it, a crushing means that cuts the transferred bead waste short, and a chip that carries out the cut chips An inner bead waste disposal device for an electric resistance steel pipe, characterized in that it comprises a conveyor, and preferably a part of the pipe cradle and the vibrating conveyor and the crushing means are movable in the length direction of the electric resistance steel pipe. Further, the internal bead waste disposal apparatus is further provided, and the crushing means is a push cutter between a claw wheel type rotary cutter and a collar, and the rotary cutter is disposed on a pair of rotary shafts. Color is the inner surface bead scrap processing apparatus of the ERW steel pipe, which is attached by a large number of sheets alternately so as to face each other.

  According to the present invention, since no pinch roll is used, there is almost no trouble in conveying bead scraps, and it is possible to treat bead scrap economically because construction of large equipment or pits is unnecessary. There is an effect.

  In the present invention, the bead waste can be treated with a combination of a simple device such as a vibrating conveyor and a crushing means, and the vibrating conveyor collects a plurality of bead scraps in the center while moving forward, so that the bead scraps are bundled. Since it enters the crushing means, there is an advantage that a small crusher can sufficiently cope with it.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an inner surface bead scrap disposal device for an electric resistance steel pipe according to an embodiment, FIG. 2 is a plan view of the same, and reference numerals 13 and 14 denote an electric resistance steel pipe P cut to a predetermined length, with one end at a fixed position A pipe cradle 11 that is held almost horizontally at a predetermined height, 11 is a nozzle inserted into the ERW steel pipe P held by these pipe cradles 13 and 14, and a mixed flow of air and water is injected to Blow header for blowing away the bead waste S, 17 is a vibrating conveyor for transferring the blown bead waste S, 18 is a crushing means for cutting the transferred bead waste S short, 19 is a chip conveyor for carrying out the cut chips C, Reference numeral 20 denotes a collection bag for receiving the chip C.

  Of the pipe cradles 13 and 14, two near the blow header 11 are fixed in this figure, but two far from the blow header 11 are mounted on the carriage 15 together with the vibration conveyor 17 and the crushing means 18. The rail 16 can move in the length direction of the steel pipe. That is, the electric resistance welded steel pipe P is held on the pipe cradles 13 and 14 substantially horizontally at a predetermined height with the ends on the blow header 11 side aligned at a certain position. Since the length of the ERW steel pipe P is different for each product, the carriage 15 is moved according to the length. The pipe cradles 13 and 14 can be adjusted in the height direction according to the diameter of the steel pipe.

The bead scrap treatment may be performed for each steel pipe, but it is efficient to perform a plurality of them together. When a plurality of nozzles are targeted, the blow header 11 can also insert a plurality of nozzles into the respective ERW steel pipes.
The vibration conveyor 17 is well known, but in the present invention, the upper side of the conveyance path is widened in correspondence with the case where a plurality of steel pipes are processed simultaneously, and a plurality of The width on the downstream side is reduced so that bead waste is collected in the center. For example, the width on the upstream side is 1,500 mm and the downstream side is 400 mm with respect to the conveyance length of 10,000 mm. Thereby, it is not necessary to use a particularly wide crushing means 18.

  Various types of crushing means 18 are also known, but in this embodiment, a pair of upper and lower rotating shafts are alternately arranged so that a claw wheel type rotating cutter 181 and a collar 182 are opposed to each other as shown in FIG. Use a large number of pieces attached to each. The bead waste S is pushed between the tip of the rotary cutter 181 and the collar 182 to form a chip. The tip edge of the rotary cutter 181 is twisted with respect to the rotation axis. As an example, six cutters and collars with an outer diameter of 300 mm are attached to each of the rotary shafts at intervals of 250 mm.

In FIG. 1, 12 is a pipe clamp for pressing the steel pipe from above, and 25 and 26 in FIG. 2 are chain conveyors on both sides of the pipe cradles 13 and 14 for carrying in and out the steel pipe.
It is not necessary when injecting only air in the blow header 11, but when injecting a mixed flow with water, a large amount of water is discharged together with the bead waste S, so a pit 23 is provided below, To pump up. In addition, the vibration conveyor 17 is provided with a cover 21 and the like.

  The place where the bead waste disposal apparatus of the present invention is installed is not particularly limited. Any one of the intermediate table 95 and the cooling bed 99 in FIG. 4 or other places may be used.

It is a front view which shows the inner surface bead waste processing apparatus of the ERW steel pipe of this invention Example. It is a top view which shows the inner surface bead waste processing apparatus of the ERW steel pipe of this invention Example. It is a front view which shows the principal part of the crushing means of this invention Example. It is a layout figure of the ERW steel pipe manufacturing factory concerning this invention.

Explanation of symbols

11 Blow header
12 Pipe clamp
13 Pipe cradle (fixed)
14 Pipe cradle (movable)
15 carts
16 rails
17 Vibration conveyor
18 Crusher
19 Chip conveyor
20 Collection bag
21 Cover
23 pits
24 Submersible pump
25, 26 Chain conveyor
91 Uncoiler
92 Looper
93 Molding machine
94 cutting machine
95 intermediate table
96 Heating device
97 Reducer
98 hot saw
99 cooling bed
181 Rotating cutter
182 Color C Tip H Band steel P ERW steel pipe
P1 ERW steel pipe (intermediate product)
P2 ERW steel pipe (product)
S bead scrap

Claims (3)

  A pipe pedestal (13, 14) that holds an ERW steel pipe (P) that has been cut to a predetermined length at a predetermined height, with one end at a fixed position, and this pipe cradle (13, 14). The blow header (11) which inserts a nozzle into the electric-resistance-welded steel pipe and blows off the internal bead waste, the vibrating conveyor (17) which transports the blown-off bead waste (S) while collecting in the center, An inner bead scrap processing device for an electric resistance welded steel pipe, comprising a crushing means (18) for cutting bead scraps shortly and a chip conveyor (19) for carrying out the cut chips.   The part of the pipe cradle (14) and the vibrating conveyor (17) and the crushing means (18) are movable in the length direction of the ERW steel pipe (P). Internal bead waste disposal device.   The crushing means (18) is a push cutter between a claw wheel type rotary cutter (181) and a collar (182), and the rotary cutter (181) and the collar (182) face each other on a pair of rotary shafts. The inner surface bead scrap disposal apparatus for an electric resistance welded steel pipe according to claim 1 or 2, wherein a plurality of sheets are alternately attached.

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