KR950004238B1 - Air wipping device for removing the alien substance of a galvinzing steel sheet - Google Patents

Abstract

A welding part detecting sensor (20)(20') and a length detecting sensor (30)(30') are electrically connected to a computer by positioning the welding part detecting sensor in outlet of a welder (320) and in inlet of a skin pass rolling equipment (400), and positioning the length detecting sensor in outlet of an acid cleaning equipment (340) and in inlet of a chrome treating equipment (410). A pair of an air injectting nozzles (50a) (50b) (50a')(50b') movable to width direction of a strip (S) on its upper and lower surfaces, are connected to the length detecting sensor, the driving motors (47a)(47b)(47a')(47b') and an air supply tube (65)(65') through an automatic cutoff valve (66)(66'). The computer calculates the moved length of the strip to use the detecting sensors (20)(20') (30)(30'). The air injectting nozzles is moved to both corners of the strip according to width information of the strip input in the memory device.

Description

Air spray device for removing foreign substances from galvanized steel sheet

1 is a configuration diagram of the galvanized steel sheet production equipment to which the present invention is applied

2 is a side perspective view showing the air injector as a whole according to this class.

3 is a block diagram of an air spraying device according to the prior art

4 is an explanatory view showing a state in which foreign matter is attached to the edge of the strip after passing through the air spraying device according to the prior art.

* Explanation of symbols for the main parts of the drawings

10,10 ': Air injection device 20.20': Welding sensor

30,30 ': Length detecting sensor 42a, 42b, 42a', 42b ': Moving shaft

47a, 47b, 47a ', 47b': Drive motor 50a.50b, 50a ', 50b': Air spray nozzle

54a, 54b, 54a ', 54b': Air supply pipe 62a, 62b, 62a ', 62b': Resolver

65,65 ': Maintaining air supply 100: Equipment control computer (DCS)

300: galvanized steel sheet production equipment 340: pickling equipment

410: chrome treatment facility S: strip

The present invention relates to an air spray device for removing foreign substances that removes water or chromium solution remaining in both edges of strips in a production facility of galvanized steel sheet. It is mounted on the exit side and the exit side of chrome treatment equipment, and galvanized steel plate is used to improve the quality of galvanized steel sheet by removing foreign substances in the corner by spraying high pressure air to the width of the strip by using equipment control computer (DCS). The present invention relates to an air spray device for removing foreign substances from a steel sheet.

In general, the galvanized steel sheet production equipment 300 made of a hot rolled coil has a coil-shaped hot rolled steel sheet (H) in a pay-off reel 310 as shown in FIG. 1. After being supplied to the welding machine 320 and passing through the welding machine 320, the scale breaker 330 enters the pickling and washing chamber ratio 340 in a state where the scale is broken in the front and rear surfaces, and pickling. After the washing process, the dimensions are adjusted in the side trimmer 350 through the dryer 345, the furnace 360 and the zinc pot (Zinc Pot) ( Proceeding to 370, the plating is performed. Then, the plated hot rolled steel sheet (H) is passed through the air cooling device 380 and the water cooling device 390 to enter the rough rolling mill (Sknlpass mil1) (400) to correct the shape and smooth the roughness and After removing the internal stress, it is transferred to the chrome treatment facility (4l0) to improve the corrosion resistance, and then chromed, and then passed through the dryer 415 to finally coil the tension reel (Tenslon ree1) 420 into the desired galvanized steel sheet. It is wound up in the form and is produced. In addition, a pair of ringer rolls (W1lnger RoI1) 340a is positioned at the rear of the pickling plant 340 to remove the Rlnsing liquid attached to the upper and lower surfaces of the pickled strip. A pair of ringer rolls 410a is also located on the exit side of the 410 to remove the chromium solution attached to the surface of the strip S. However, even though the strip passes through the ringer rolls 340a and 410a, since the water and the chromium solution remain at both edges Ed9e, an air spraying device 200 for removing the same is mounted as shown in FIG. It is. That is, the air spraying device 200 is positioned between the pickling plant 340 and the dryer 345, and between the chrome treatment plant 410 and the dryer 415, respectively. It is to be sprayed. However, the supports 220a and 220b are coupled to the bolts 230a and 230b, and the air spray nozzles 210a and 210b are manually horizontally adjusted according to the width of the strip S to be adjusted appropriately. For this reason, the worker was very troublesome because he had to modify the strips S having different widths every time. Therefore, it is difficult to accurately move the air spray nozzles 210a and 210b, as well as productivity, so that foreign matter (moisture, chromium solution) K is attached to the lateral edges Sa and Sb of the strip S. It was maintained as to reduce the quality of the product.

The present invention has been made in order to solve the above-mentioned conventional problems, the foreign material (water, chromium solution, dust) present in the corners of both sides of the strip at the exit of the pickling plant and the exit of the chrome treatment plant, the pressure of air By using the equipment control computer (DCS) to automatically remove the foreign matter from the galvanized steel sheet, which greatly improves product quality and improves productivity. The object is to provide an air spray device.

In order to achieve the above object, the present invention, in the air spraying apparatus located behind the pickling plant and the chrome treatment plant of the galvanized steel sheet production equipment, the welding part detection sensor is located at the exit of the welding machine and the entrance of the temper rolling equipment The length detection sensor is placed at the entrance of the pickling equipment and the chrome treatment equipment, and is electrically connected to the equipment control Kimputer. The top and bottom surfaces of the strip are located at the outlet of the pickling equipment and at the outlet of the chrome treatment equipment. And a pair of air spray nozzles movable in a width direction in the air, the air spray nozzles being connected to a resolver and a driving motor whose rotation speed is controlled by a facility control computer. While connected to the supply main, the facility control computer calculates the traveling distance of the strip by using the weld detection sensor and the length detection sensor. Remove the foreign matter from the galvanized steel sheet by moving the air spray nozzles to both sides of the strip according to the width of the strip input into the storage device, and opening and closing the shut-off valve frame to remove foreign matters with high pressure air. By air injection.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

As shown in FIG. 1, the air spraying apparatus 10 (10 ') which concerns on this invention is arrange | positioned with the same structure in the exit side of the pickling installation 340, and the exit side of the chromium processing installation 410, respectively. . In addition, the weld detection sensors 20 and 20 'are positioned at the exit of the welding machine 320 and the entrance of the temper rolling facility 400, and the exit of the pickling facility 340 and the entrance of the chrome treatment facility 410. Length detection sensors 30, 30 'are positioned on the side, and the weld detection sensors 20, 20' and the length detection sensors 30, 30 'are electrically connected to the facility control computer 100, respectively. have. In addition, since the air injector 10, 10 'is identical to each other as shown in FIG. 2, the air injectors 10 and 10' will be described in more detail below in the vicinity of the pickling plant 340. Adjacent ones will be marked with a celadon (') to the same reference numeral. The air injector 10 has a pair of vertical walls 35a and 35b facing each other, and a pair of horizontal walls 37a and 37b are formed to connect the vertical walls 35a and 35b. The strip S proceeds to the inner space formed by the vertical walls 35a and 35b and the horizontal walls 37a and 37b.

In addition, a pair of nozzle blocks 40a and 40b are positioned on the inner surfaces of the horizontal walls 35a and 35b, respectively, so that the movable sides 42a and 42b are rotatable so as to be rotatable. One end of 42b extends to the outside of the vertical wall 35a and is driven through a bearing block 45a, 45b and a coupling 46a, 46b placed on the support plates 43a, 43b. 47a and 47b, respectively. In addition, the driving motors 47a and 47b perform a predetermined number of forward and reverse rotations according to the electrical signal instructed by the facility control computer 100.

In addition, threads 49a and 49b having different directions from each other are formed between the nozzle blocks 40a and 40b on the moving sides 42a and 42b, respectively, and the threads of the moving shafts 42a and 42b are formed. 49a) and 49b are block-type air spray nozzles 50a and 50b screwed together, and the air spray nozzles 50a and 50b have upper and lower ends of the nozzle blocks 40a and 40b. The slide bar is fitted so as to be slidable to the rod (52a, 52b) of the circular rod shape connecting each other, and the air supply pipe (54a) (54b) is connected to the air injection nozzle (50a) (50b), The air supply pipes 54a and 54b are coupled to the air injection nozzles 50a and 50b through flexible hoses 56a and 56b. The other end of the moving shafts 42a and 42b extends to the outside of the vertical wall 35b and is fitted to the bearing blocks 60a and 60b placed on the support plates 58a and 58b, and at the ends thereof. Resolvers 62a and 62b for detecting the rotational speeds of the moving shafts 42a and 42b are respectively fixed, and the resolvers 62a and 62b are electrically fixed to the facility control computer 100. Equipped. The air supply pipes 54a and 54b are integrally connected to an air supply main pipe 65, and the air supply main pipe 65 is connected to an auto shutoff valve 66 operated by an electric spatula by a solenoid valve. Equipped. Reference numeral 68 is a base of the fixing base, and 70a and 70b are limit switches.

In the present invention configured as described above, the welding part of the strip S is first detected by the welding part detection sensor 20 (20 '), which causes the welder 320 to weld the ends of the strips S having different widths from each other. Punching a 25 mm hole (not shown) in the center of the weld after connection is made, each of the weld detection sensors 20, 20 'transmits a light beam and passes through the hole. The weld will be detected. These signals are each provided to facility control computer 100. In addition, the distance between the weld detection sensor 20 and the pickling facility 340, and the distance between the weld detection sensor 20 and the chrome treatment facility 410 is fixed, so the length detection sensor (Reso1ver) 30 ( 30 ') rotates a certain number to detect the traveling distance of the strip S and provides the traveling length to the facility control computer 100, the facility control computer 100, the traveling distance of the strip (S) and the weld detection sensor If the distance from 20 to pickling facility 340 and the distance from weld detection sensor 20 to chrome treatment facility 410 are judged to be equal to each other, the weld of strip S is determined to be the same. It can be seen that located in the front 5m of the air injector (10, 10 ').

In this case, the facility control computer 100 rotates the drive motors 47a and 47b of the air spraying devices 10 and 10 ', respectively, and in this case, the width of the corresponding strip S (the facility control computer The driving motors 47a and 47b maintain an appropriate rotational speed by providing an electrical signal to 100. Meanwhile, the air injection apparatuses 10 and 10 'are respectively driven motors 47a and 47b. As the rotation is rotated, the moving shafts 42a and 42b are rotated, and the air jet aging 50a and 50b coupled to the threads 49a and 49b of the moving shafts 42a and 42b are respectively. The nozzle blocks 40a and 40b move in opposite directions, that is, the threads 49a and 49b are formed in different directions, and the upper and lower ends of the air spray nozzles 50a and 50b are respectively fixed. The air spray nozzles 50a and 50b are moved in the width direction of the strip S because they can slide on the 52a and 52b, while the rotational speeds of the moving sides 42a and 42b are used. Are detected at the resolvers 62a and 62b, respectively, and provided to the facility control computer 100. The facility control computer 100 detects these rotational speeds and sets the drive motors 47a and 47b to the width of the strip. In addition, the air supply pipes 54a and 54b connected to the air injection nozzles 50a and 50b through the flexible hoses 56a and 56b are provided in the air supply main body 65. The shut-off valve 66 is opened by the facility control computer 100 to supply air to the air spray nozzles 50a and 50b, and the air spray nozzles 50a and 50b are provided at both sides of the strip S. High-pressure air is injected into the corners to remove foreign substances, wherein the limit switches 70a and 70b which are located close to the air spray nozzles 50a and 50b are respectively air spray nozzles 50a and ( The air spray nozzle 50 is for preventing excessive movement of 50b on the moving shafts 42a and 42b. When a) 50b is excessively moved to contact the limit switches 70a and 70b, the limit switches 70a and 70b respectively stop the rotation of the drive motors 47a and 47b.

As described above, according to the present invention, foreign substances present at both edges of the strip are removed by air pressure at the exit side of the pickling chamber ratio and the exit side of the chrome treatment facility, and the air injection removal operation is performed by the welding part detection sensor and the length detection sensor. Since the equipment control computer (DCS) is used automatically made according to the width of the strip (S), the productivity of the work is greatly improved, and effectively remove the foreign matter, so that the quality of the finished product is greatly improved.

Claims (1)

In the air spraying device located behind the pickling facility 340 and the chrome treatment facility 410 of the galvanized steel sheet production equipment, a weld detection sensor is provided at the exit of the welding machine 320 and the entrance of the temper rolling equipment 400. Position 20 and 20 '. The length detecting sensors 30 and 30 'are positioned at the exit of the pickling facility 340 and the entrance of the chrome processing facility 410 to be electrically connected to the facility control computer 100, and to the pickling facility 340. On the exit side of the chrome treatment equipment 410, a pair of air injection nozzles 50a, 50b, 50a 'and 50b' which are movable in the width (Wldth) direction from the upper and lower surfaces of the strip S are provided. And the air spray nozzles 50a, 50b, 50a 'and 50b' are equipped with resolvers 62a and 62b and drive motors 47a and 47b whose rotation speed is controlled by the facility control computer 100. 47a ') 47b', and the air injection nozzles 50a, 50b, 50a ', 50b' are provided with air supply mains 65, 65 through automatic shutoff valves 66, 66 '. ', While the facility control computer 100 calculates the traveling distance of the strip S using the weld detection sensors 20, 20' and the length detection sensors 30, 30 ', The air jetting nozzles 50a and 50 according to the width of the strip S input into the storage device. b) 50a 'and 50b' are moved to both side edges Sa and Sb of the strip S, and the shutoff valves 66 and 66 'are opened and closed to remove foreign substances K with high pressure air. Air spray device for removing foreign matter in the galvanized steel sheet characterized in that the removal.