KR101958416B1 - Automatic pickling apparatus for stainless steel - Google Patents

Abstract

The present invention relates to an automatic pickling apparatus for stainless steel, capable of largely improving stability. According to the present invention, the automatic pickling apparatus for stainless steel comprises: a pickling tank group, wherein a pickling tank filled with a pickling solution, a plurality of water washing tanks filled with a water washing solution, and a hot water tank filled with hot water are sequentially disposed; a checking plate disposed between the water washing tank and the hot water tank, and including a high pressure washing means; a load/unloading cart disposed between the water washing tank and the checking plate to be able to go in and out so as to input/output an object to be pickled; a pair of guide rails installed in parallel at a predetermined height in an arrangement direction of the picking tank group; a first cross girder including a first traveling means to reciprocate along the guide rail, and starting from a loading/unloading cart position, stopping at a position corresponding to each processing tank of the pickling tank group and the checking plate for a set time, and returning to the loading/unloading cart position in accordance with a control signal; first and second hoists mounted by being spaced apart from the first cross girder, including first and second transferring means, respectively to be transferred along the first cross girder, and including first and second winch means, respectively, to hang and support both end parts of the object to be pickled; and a control unit storing a position value for each processing tank of the pickling tank group, the loading/unloading cart, and the checking plate, and an elevation height value of the first and second winch means, having a control program embedded therein to automatically control operation of the first traveling means of the first cross girder, and the first and second transferring means and the first and second transferring means of the first and second hoists, and including an operation display panel to set and display detail operation by each process.

Description

TECHNICAL FIELD [0001] The present invention relates to a stainless steel automatic pickling apparatus,

The present invention relates to an automatic acid processing apparatus for removing a scale generated during a heat treatment of a stainless steel, and more particularly, to an automatic acid processing apparatus for automatically removing a scale from a stainless steel pipe, And more particularly to a stainless steel automatic acid processing apparatus capable of surely ensuring the safety of workers.

As will be appreciated, stainless steel is a metal material having excellent properties in terms of corrosion resistance, oxidation resistance and high temperature strength, and is widely used in various industrial fields because it is resistant to acid and does not rust.

Such stainless steels are classified into chromium (Cr) and nickel (Ni) based on the alloy composition, and are further subdivided according to the metal structure. The Cr system is classified into a ferrite system and a martensite system, The Ni system is classified into austenite system and a dual phase system composed of two phases of ferrite and austenite.

Stainless steel having such a composition and a metal structure is subjected to a high-temperature oxidation heat treatment step in order to uniformize the structure of the alloy steel during its production. In the high-temperature oxidation heat treatment process, the stainless steel surface has a dense structure, And a carbonized scale are formed, thereby deteriorating the merchantability.

Accordingly, after the heat treatment is completed, the stainless steel is subjected to pretreatment such as salt bath, shot blast and neutral salt electrolysis to remove scale to some extent, and then, usually, mixed acid of nitric acid and hydrofluoric acid is used The scale of the surface is completely removed.

On the other hand, even in a pipe in which stainless steel is mainly used, the stainless steel pipe produced by the pipe making machine is subjected to a annealing process called annealing or annealing in a heat treatment apparatus after being formed.

In this annealing process, the stainless steel pipes formed in the pipe are removed from the stainless steel pipe and the internal structure is uniformed. However, as the pipes are oxidized and decarburized during the annealing process, the scale becomes blackened and the merchantability is lowered.

Therefore, it is general to treat the surface of the steel pipe by pickling which removes the scales generated by the oxidation and decarburization of the pipe with acid after the annealing process,

Such a pickling treatment (hereinafter abbreviated as "acid treatment") is a very dangerous operation because scales are removed by using nitric acid and hydrofluoric acid which are fatal to the human body. Nevertheless, conventionally, the acid treatment process is proceeding manually by the human force, so that many problems are posed.

In other words, in the conventional acid treatment process, the pipe to be pickled is mounted on a truck and is pushed to the treatment site, and then the crane is manually operated to move the pipe to the pickling bath, The scale is removed by repeating several times, and the acid taxane is rinsed (rinsed) by a method in which the pipe subjected to the pickling treatment is moved to the water tank and settled in the washing liquid.

Therefore, the operator has to operate the crane individually near the pickling trough during the acid treatment process, so that the operator always has to be exposed to the fumes generated in the acid treatment operation, and the operator is inevitably tilted by dizziness There is a problem that the safety of the workers is insufficient such that the risk of falling into the pickling bath can not be excluded.

In addition, since the acid treatment for removing the scale depends on the sense of the operator, it is difficult to secure a uniform uniform quality, and the operation time is considerably long, which leads to a problem that productivity is greatly lowered.

Korean Patent No. 10-0230011 Korean Patent No. 10-1254762

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a method and apparatus for automatically performing a pickling process for removing scale generated during heat treatment of stainless steel, And it is an object of the present invention to provide a stainless steel automatic acid processing apparatus capable of achieving a uniform quality, shortening a working time, and contributing to productivity improvement.

According to an aspect of the present invention, there is provided a stainless steel automatic acid treatment apparatus comprising a pickling bath filled with an acidic solution, a plurality of water baths each filled with a wash solution, and a hot water bath filled with hot water at a predetermined temperature Acid treatment group; A check table disposed between the water bath and the hot water bath and having high pressure cleaning means; A loading / unloading truck arranged so as to be able to enter and exit between the water tank and the inspection table to load / unload the object to be acid treated; A pair of guide rails arranged parallel to the predetermined height along the arrangement direction of the acid treatment tank group; Wherein the control unit is provided with a first running means and is reciprocating along the guide rail, wherein the control unit starts at a loading / unloading carriage position by a predetermined control signal, A first cross girder for stopping for a set time of the loading / unloading bogie and returning to the loading / unloading bogie position; The first cross girder is provided with first and second conveying means and can be moved along the first cross girder. The first and second winch means are provided to suspend both ends of the object to be treated First and second hoists supporting the hoist; A position value of each processing tank, loading / unloading bogie, and inspection zone of the acid treatment tank group, and elevation height values of the first and second winch means are stored, and a predetermined control program is built in, An operation display panel for automatically controlling the driving of the first running means, the first and second conveying means of the first and second hoists, and the first and second winch means and setting and displaying the detailed operation of each step And a control unit having the control unit.

A second cross girder for reciprocating along the guide rail, the second cross girder having a second traveling means controlled by the control unit; and a third and a fourth conveyance, which are separated from the second cross girder and are controlled by the control unit, Further comprising third and fourth hoists respectively having third and fourth winch means, wherein said first cross girder moves to said check station position and then returns to said loading / unloading carriage position, It is preferable that the second cross girder start from the check stand position and stop at a position corresponding to the hot water tank for a predetermined set time and then move to the loading / unloading bogie position, thereby minimizing the working time .

And a hanger means having a hanger having a longitudinal reinforcing rib on the plate body and at least two sling bands for hanging the object to be acid treated on the hanger, And a plurality of fixing holes for fixing the respective sling bands are formed in the lower side so as to be arranged in the longitudinal direction. Thus, it is possible to stably support and carry the acid treatment object I will.

The object to be acid treated is a stainless steel pipe. The object to be acid treated is kept inclined at a predetermined angle during the intake and outgoing of each treatment tank in the acid treatment tank group, and returned horizontally after completion of intake and outflow Thereby reducing friction at the time of intake and suppressing the shaking due to the force of air escaping from the pipe and allowing the solution in the pipe to be easily discharged at the time of heading.

According to the stainless steel automatic acid processing apparatus of the present invention, the cross girder traveling operation moving on the upper part of the acid treatment tank group and the hoist transporting and winch operation mounted on the cross girder are automatically performed by the control signal of the control unit As a result, a series of pickling treatment steps for removing the scales generated during the heat treatment of the stainless steel can be automatically performed.

Accordingly, the operator can check the operation status in the safe area outside the acid treatment plant and easily confirm the progress of the operation through the operation display panel, thereby minimizing the operator exposure to the acid tax and fumes.

In addition, since the work conditions are set through the operation display panel of the control unit, not only a uniform quality can be ensured as compared with the conventional one, which depends on the skill level of the operator, but also the working time required for the acid processing can be predicted, Can be greatly shortened.

Therefore, the present invention has an excellent effect of exerting a great effect on the reliability, safety, and productivity improvement of the stainless steel acid treatment.

1 is a plan view schematically showing an automatic acid processing apparatus according to the present invention,
2 is a side view of an automatic acid processing apparatus according to the present invention,
Fig. 3 is a side view taken along the line III of Fig. 2,
4 is a perspective view showing the hanger bar of the automatic acid processing apparatus according to the present invention,
5 is a schematic block diagram for explaining a control method of an automatic acid processing apparatus according to the present invention;
6 is a view showing a main operation screen of a control section display panel of an automatic acid processing apparatus according to the present invention,
7 is a view showing an example of a setting screen of a control panel display panel of an automatic acid processing apparatus according to the present invention,
8 is a side view showing a state in which an automatic acid treatment apparatus according to the present invention places an acid treatment object in a pickling bath,
9 and 10 are side views showing a process of putting an acid treatment object into a pickling bath in the present invention.
11 is a sectional view taken along the line XI-XI in Fig. 10,
12 and 13 are side views showing a process of putting an acid treatment object, which has been subjected to acid treatment, into a water bath in the present invention,
Fig. 14 is a side view showing a state in which the object to be acid-treated after water treatment is placed on the inspection table.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the attached drawings.

1 to 7, a stainless steel automatic acid processing apparatus according to the present invention basically comprises an acid treatment tank group composed of a plurality of treatment tanks arranged so as to be filled with predetermined treatment liquids respectively, A hoist crane means for suspending the acid treatment object P and for sequentially taking in and out of each treatment tank of the acid treatment tank group and a control portion 100 for controlling the hoist crane means to automatically perform a predetermined acid treatment step set by the hoist crane means ).

The acid treatment tank group includes a pickling bath 110 filled with an acid solution L mixed with a suitable amount of hydrofluoric acid and nitric acid, a plurality of water baths 120, 130 and 140 filled with a wash water W, And a hot water tank 160 filled with hot water maintained at about 45 ° C to 55 ° C are spaced apart from each other at regular intervals.

The water treatment tanks 120, 130 and 140 are provided with a plurality of cleaning tanks to wash the acid solution L more efficiently after the pickling process. That is, in the case of a single water tank, the washing effect is low, and the wash water W is easily contaminated with acid and frequent replacement of the wash water W is required. So that the acidic liquid L can be washed more reliably and the contamination of the washing liquid W can be suppressed as much as possible and the replacement cycle can be sufficiently extended.

Between the last water tank 140 and the hot water tank 160 is provided a check table 150 for checking the acid treatment object P that has been washed with water and completely removing the residual acid liquid L. [ To this end, it is preferable that high-pressure cleaning means (not shown) is installed in the inspection table 150 to cleanly remove the residual acid liquid L by spraying washing water at a high pressure.

The acid treatment is carried out in order to remove the scale generated during the heat treatment of the stainless steel and to improve the corrosion resistance. However, if the acid treatment liquid (L) remains in the acid treatment object (P), corrosion may occur.

However, in the water washing process, the acid treatment liquid P is simply dipped in the wash liquid W to wash away the acid liquid L. Therefore, even if the washing process is completed, the acid liquid L may remain, It is necessary to reliably remove the residual acid liquid L by providing the high pressure cleaning means on the stand 150

On the other hand, acid pickling (L) does not remain in the acid treatment object (P) which has been subjected to the high pressure cleaning as described above, but there is a high probability that water stains will occur when the acid treatment liquid In this case, since the merchantability is lowered, it is necessary to quickly remove water to prevent the occurrence of water stains.

The hot water tank 160 is provided to prevent such water spots, and the hot water is maintained at about 50 ° C or so, for example, 45 to 55 ° C. If the temperature is less than 45 ° C, the effect of preventing water stains due to high temperature is insufficient. If the temperature is higher than 55 ° C, there is a risk of energy waste and worker injury due to overheating. If the acid treatment object P having been subjected to the high pressure cleaning is immersed for a certain period of time and taken out, the water of the acid treatment object P is rapidly evaporated by the temperature difference between the acid treatment object P and the outside air, .

The hoist crane means comprises a pair of guide rails 10 arranged side by side at intervals, a first cross girder 20 across the guide rails 10, And includes first and second hoists 30 and 40 mounted thereon.

The guide rails 10 are installed at predetermined heights along the arrangement direction of the treatment tanks 110 to 160 of the acid treatment tank group and can be supported by a frame F such as a wall.

The first cross girder 20 can be reciprocated along the pair of guide rails 10 by having the first travel means 21 at both ends thereof. The first traveling means 21 is provided with saddles for stable running of the first cross girder 20. The saddles may include a first traveling motor 22 and a traveling wheel driven thereby.

The first traveling motor 22 may be provided with a first encoder 23 for detecting the rotation angle thereof and transmitting a detection signal to the control unit 100. The control section 100 can control the movement distances S1 to S10 of the first cross girder 20 by controlling the driving of the first travel motor 21 based on the signal of the first encoder 23 .

On the other hand, the first and second hoists 30 and 40 are provided with the first conveying means and the second conveying means, respectively, and can be conveyed along the first cross girder 20, And the second winch means, respectively, so as to lift and lower the pick-up object P, respectively.

The first and second feeding means may be composed of first and second feeding motors 33 and 43 and first and second feeding wheels (not shown) driven by the first and second feeding motors 33 and 43, respectively. The first and second feed motors 33 and 43 may be provided with a third encoder 34 and a fifth encoder 44 for detecting the respective angles of rotation and sending them to the control unit 100, The control unit 100 can control the feed of the first and second feed motors 33 and 43 based on the signal.

The first and second winch means are respectively wound and unwound by first and second winch motors 31 and 41 and reels (not shown) by these first and second winch motors 31 and 41 The first and second wire ropes 35 and 45 and the first and second hooks 36 and 46 which are fixed to the ends of the wire ropes 35 and 45 to support the pick- ).

The first and second winch motors 31 and 41 of the first and second winch means also include second and fourth encoders 32 and 42 for detecting the rotation angles of the first and second winch motors 31 and 41 and outputting them to the control unit 100 . The control unit 100 controls the driving of the first and second winch motors 31 and 41 based on the signals of the second and fourth encoders 32 and 42 so that the first and second hooks 36 and 36 ) 46 can be controlled.

The present invention is preferably connected to the first and second hooks 36 and 46 of the first and second hoists 30 and 40 so as to stably suspend the object P And hanger means for supporting the acid treatment object P by supporting it. In other words, since the first and second hooks 36 and 46 are provided on the first and second wire ropes 35 and 45, they can be strongly shaken when the heavy object P is moved. In this case, It is possible to prevent hindrance to the smooth operation and to provide the hanger means so as to suppress the shaking of the object P to be picked up during movement and to maintain the interval between the first and second hoists 30 and 40 Lt; / RTI >

The hanger means can be configured in various forms. For example, as shown in FIG. 2, the hanger 50 in the form of a bar having both ends hooked to the first and second hooks 36 and 46, And a hanger bar composed of two sling bands 55 for supporting the object P to be hung on the hanger 50.

The hanger 50 has a thick plate-like body 51 (see Fig. 4) so as to sufficiently support the load of the object P to be subjected to the acid treatment while having excellent corrosion resistance and acid resistance to the harmful fumes of the pickling bath, The reinforcing ribs 52 are formed in the longitudinal direction. A plurality of connection slots 53 for hooking the first and second hooks 36 and 46 are formed on both ends of the body 51 and a sling band 55 is fixed to the lower side thereof A fixing hole 54 is formed.

It is preferable that a plurality of fixing holes 54 are provided at regular intervals in the longitudinal direction of the body 51 so that the fixing position of the sling band 55 can be adjusted according to the length of the object P. [

Each of the sling bands 55 may be made of, for example, a PE material that is flexible for easy handling and safety, and has excellent moisture resistance and chemical resistance, since the acid treatment object P is suspended and charged into the pickling liquid L. , And both ends are fixed to the fixing hole 54 of the hanger 50 by a shackle 56.

A loading / unloading carriage 60 is provided between the water reservoir 140 and the check base 150 to feed the acid treatment object P to the work area and to carry out the acid treatment object P after the acid treatment, .

The loading / unloading bogie 60 carries the pickling object P while riding on a bogie rail 61 disposed at right angles to the guide rail 10 for the hoist, moving the work area and the safe area. Preferably, the loading / unloading carriage 60 is also provided with a driving means (not shown) having an encoder and can be operated through the remote controller or the control unit 100.

The control unit 100 incorporates a predetermined control program and includes various components necessary for control such as a CPU, a timer, and a memory. The control unit 100 stores position values of the processing groups 110 to 160 of the pickling group, the check unit 150 and the loading / unloading bin 60. For example, the loading / unloading bin The relative positions S1 to S10 of the treatment vessels 110 to 160 and the inspection table 150 are set on the basis of the position values of the first cross girder 20 and the first cross girder 20, Position automatically.

Various data necessary for program control, such as the horizontal feed position value of the first and second hoist 30 (40) and the vertical lift height values of the first and second hooks 36 and 46, It is possible to automatically control the drive of the first and second winch motors 31 and 41 necessary for the picking up and picking up operation of the pickling object P in the pickling process.

6 and 7, the control unit 100 includes an operation display panel 101 for setting and displaying the detailed operation of each process as well as the entire acid treatment process. The detailed operation setting value through the operation display panel 101 is reflected in the operation of the control program built in the control unit 100 and accordingly the number of immersion times for the acid tax L And time can be adjusted. The degree of contamination can be configured so that the control section can automatically determine the degree of contamination, for example, by the data from the sensor provided at the preparation position of the bogie 60 or the loading / unloading position. For example, as a sensor, a visual sensor, e.g., a camera, is provided so that the image acquired from the camera can be subjected to image processing. Alternatively, for example, a chemical sensor such as an acidity sensor or a corrosion degree sensor may be provided as a sensor.

At this time, it is preferable that the control program is set so as to have a waiting time for stopping for a certain period of time after movement between the respective steps of the pick-up object P and ascending and descending. This means that the shaking generated after the movement of the heavy object, So that stable operation can be achieved. Alternatively, the hoist may be actively controlled to reduce the waiting time by controlling the hoist so as to impart the opposite shake in accordance with the swing period of the object P to be picked up.

Accordingly, the operator can safely perform the acid treatment process while checking the operation status of the acid treatment process and confirming the progress in the safety zone, which is separated from the work zone in which the pickling bath, the water tank, and the hoist are installed.

<Operation>

Next, the operation of the apparatus for automatically processing stainless steels according to the present invention having such a structural feature will be described with reference to FIGS. 8 to 14. FIG.

First, the acid treatment object P may be, for example, a stainless steel pipe, and is supplied in the form of a bundle bundled by a plurality of bands B as shown in Fig. As shown in Fig. 1, the acid-treated object P is mounted on a loading / unloading carriage 60 by a crane or the like at a preparation position (1) outside the working area, / Unloading position (2). At this time, the first cross girder 20 is positioned at the upper portion of the loading / unloading carriage 60.

In this state, the winch motors 31 and 41 of the first and second hoists 30 and 40 are operated simultaneously, for example, by the signals of the control unit 100, The two wire ropes 35 and 45 are unrolled, and the hanger 50 is lowered by the set height while keeping the horizontal. The worker hangs the sling band 55 provided at the fixing hole 54 of the hanger means at both ends of the pickling object P and fixes the sling band 55 to the hanger 50 to remove the band B.

Next, the details of each step for the number of times of immersion, the number of times of flooding with respect to acid tax L, the time and the like are manually set according to the contamination state of the object P to be treated by the operation display panel 101 of the control unit 100, Press the Start button. Alternatively, the work may be automatically started after it is automatically set according to the degree of contamination from the visual sensor or the chemical sensor.

8, the first and second winch motors 31 and 41 of the first and second hoists 30 and 40 are operated, for example, at the same time to rotate the first and second wire ropes 35 and 35, The hanger 50 raises the pickling object P to a predetermined height and then the first traveling motor 22 operates in accordance with the signal of the control unit 100 by a predetermined distance S1 The first cross girder 20 moves to the picking position (3) above the pickling bath 110 and waits for vibration reduction for a predetermined period of time. Or positively gives an opposite vibration for vibration reduction.

9, the first and second winch motors 31 and 41 of the first and second hoists 30 and 40 simultaneously operate to rotate the first and second wire ropes 35 ) 45 is released, so that the hanger 50 is lowered by a predetermined height and then stopped. At this time, the acid treatment object P is horizontally positioned on the acid liquid L of the pickling bath 110.

In this state, any one of the first and second hoist 30, 40, for example, only the first winch motor 31 of the first hoist 30 is operated, so that the first wire rope 35 ) Is released by a predetermined length. Then, as shown by the imaginary line in FIG. 9, the hanger 50 is inclined by a predetermined angle. Then, only one end of the acid treatment object P starts to be supplied to the acid liquid L. The inclined state is obtained by reducing the resistance when the object (P) to be acid treated, which is a stainless steel pipe, reduces the resistance, and by the force generated when the acid liquid (L) This is to prevent the object P from being shaken.

At this time, when the object P to be treated is not a pipe, it is not always necessary to provide a gradient.

Next, as shown by the solid line in FIG. 10, only the other hoist 40, for example, the second hoist 40 is operated to loosen the second wire rope 45 by a predetermined length so that the other end of the hanger 50 is lowered by a predetermined height The entire surface of the acid-treated object P is submerged in the acid liquid L.

10 and 11, the first and second hoists 30 and 40 are simultaneously operated to move the first and second wire ropes 35 and 45 by a predetermined length The object H is placed on the bottom of the pickling bath 110 by lowering the hanger 50 in a horizontal state.

In this state, the pickling process of the pickling object P is performed by waiting for a predetermined time.

Thereafter, the operation is performed in reverse to the above-described operation to exit the acid pickling bath L of the pickling bath 110 while maintaining the inclined state of the pickling object P to pick up the acid pickling liquid L ) Is easily discharged.

That is, the first and second hoists 30 and 40 are simultaneously operated to wind the first and second wire ropes 35 and 45 by a predetermined length so that the pick- Only the second hoist 40 is operated and the second wire rope 45 is wound by a predetermined length so that only one end of the hanger 50 is lifted. Then, the hanger 50 is tilted so that only one end of the acid treatment object P comes out to the top of the pickling liquid L. In this state, the first and second winch motors 31 and 41 simultaneously operate , The first and second wire ropes (35, 45) are wound by a predetermined length to take out the acid treatment object (P) in a tilted state, and the acid pickling liquid (L) is also discharged very smoothly. Then make the horizontal.

Then, in such a state, the acid treatment object P is repeatedly immersed in the acid solution L several times to immerse the acid treatment liquid P, thereby completely removing the scale.

That is, it repeats the processes of air horizontal-aerial slope-descent (intake) -water slope-underwater horizontal-underwater slope-ascension (heading) -air slope-air horizontal, In the case of a slope, it means to be in an inclined state.

12, the first cross girder 20 moves by a predetermined distance S2 in a state in which the hanger 50 and the acid treatment object P are inclined, And stops at the upper portion of the first water receiving tank 120 at the water washing position (4).

In this state, the first and second winch motors 31 and 41 of the first and second hoists 30 and 40 simultaneously operate as shown by the solid line in FIG. 13, (35) and (45) by a predetermined length. Then, the acid treatment object P descends by a predetermined height set in a tilted state, and one end thereof is obtained in the wash water W.

13, only the second winch motor 41 of the second hoist 40 is operated to release the second wire rope 45 by a predetermined length, The other end of the acid treatment object P, which has not yet been obtained in the wash water W, is kept horizontal.

And the water washing process is performed by holding the water for a predetermined time set in this state.

Thereafter, the picked-up operation is performed in reverse to the above-described picking-up operation, and the pickling liquid L can be rinsed (rinsed) while repeating the same operation twice or more. That is, the water supply and the water supply are repeated, but the water supply and water supply are performed in an inclined state.

Next, the first cross girder 20 is moved to the second water washing position (5) and the third water washing position (6) in accordance with the signal from the controller (100) after finishing the process in the first water receiving tank (120) The object to be treated P is moved in the same manner as in the first water treatment tank 120 while moving by the distance S3 and S4 sequentially to the second water treatment tank 130 and the third water treatment tank 140 The acid solution (L) is gradually washed by getting it to the detergent solution (W) for a certain period of time.

After the cleaning of the pickling liquid L is completed by sequentially passing through the water treatment tanks 120 to 140 as described above, the acid treatment object P is held horizontally as shown in FIG. 14, The girder 20 travels by the predetermined distance S5 and moves to the inspection position (7) on the upper part of the inspection table 150.

Subsequently, the first and second winch motors 31 and 41 of the first and second hoist 30 and 40 are simultaneously operated to move the first and second wire ropes 35 and 45 to a predetermined length So that the acid-treated object P having been cleaned is lowered to a predetermined height just above the inspection table 150.

In this state, after the worker binds both ends of the object P to be picked up by using the band B, the first and second hoists 30 and 40 are further lowered and bound to the band B Place the acid treatment object (P) on the inspection stand.

Then, the acidic liquid L remaining finely remaining through the high-pressure cleaning means (not shown) is cleanly washed away. At this time, if the operator does not need the high-pressure cleaning, the high-pressure cleaning may not be performed. The degree of residue of the acidic solution may be configured such that the control unit is automatically determined by a chemical sensor such as a visual sensor such as a camera, an acidity meter, or a corrosion meter.

Thereafter, the object P to be picked up again rises by the respective hoists 30 and 40, and then the first cross girder 20 travels by the predetermined interval S8 set and moves to the hot water washing position (8) And is transported to the upper part of the tank 160. Subsequently, the first and second hoists 30 and 40 descend by a predetermined height to obtain hot water, hold it for a predetermined time, and then rise. The intake and outflow are made in the inclined state.

Then, since the object P to be treated from the hot water tank is higher in temperature than the atmosphere, the water on the surface is quickly evaporated by the temperature difference with the atmosphere, so that water spots are not generated.

The object P to be picked up from the hot water tank 160 after the completion of all the acid treatment processes travels in the reverse direction by the predetermined distance S9 of the first cross girder 20 and returns to the loading / unloading position (2) do. Unloading carriage 60 by the descending operation of the first and second hoists 30 and 40 and the sling band 55 of the hanger means is removed and the loading / unloading carriage 60 To the preparation position (1).

&Lt; Second Embodiment: Second Cross Girder >

On the other hand, such an acid treatment process can be classified into a process having a high risk of being exposed to an acid tax (L) and a process having a relatively low risk of exposure to an acid tax (L). That is, the acidity (L) exposure risk of the pickling process (③) and the water washing process (④ ~ ⑥) is high and the risk of exposure to acid tax is relatively low in the inspection and high pressure washing process (⑦) Preferably, the present invention further includes a second cross girder 70 capable of traveling along the guide rail 10, so that the first cross girder 20 is divided into a pickling process (3) and a washing process (4) to And the second cross girder 70 can be configured to perform the inspection and high-pressure cleaning process (7) and the hot water washing process (8). By simultaneously performing the operation of the first cross girder 20 and the operation of the second cross girder 70, the working efficiency can be maximized.

In this case, the second cross girder 70 also has the same configuration as that of the first cross girder 20, and can be controlled by the control unit 100 to automatically perform a series of operations.

5, the second cross girder 70 can be moved along the guide rail 10 by providing the second travel means 71 at both ends thereof, and the second cross girder 70 can be moved along the guide rail 10, The traveling motor 72 is provided with the sixth encoder 73 to detect the rotation angle of the second traveling motor 72 so that the control unit 100 can control the movement thereof.

The second cross girder 70 is also provided with third and fourth hoists 80 and 90 spaced apart from each other for suspending the object P to be picked up. The eighth and tenth encoders 84 and 94 are respectively provided in the third and fourth feed motors 83 and 93 of the third and fourth hoists 80 and 90 to detect And seventh and ninth encoders 82 and 92 are provided in the third and fourth winch motors 81 and 91, respectively, so that the rotation angles thereof can be detected.

Accordingly, the first cross girder 20 seats the pickling object 110 and the pickling object P, which have sequentially passed through the plurality of water receiving tanks 120 to 140, on the check base 150, The operation returns to the loading / unloading position (2) when a return signal is inputted through the operation display panel 101 of the operation panel.

The worker then suspends the pickled object P placed on the check base 150 to the third and fourth hoists 80 and 90 of the second cross girder 70, When the operation signals of the second cross girder 70 are input, the third and fourth hoists 80 and 90 and the second cross girder 70 are connected to the first cross girder 20 and the first and second cross girders 20, The object to be treated P is immersed in the hot water tank 160 and moved to the loading / unloading position (②) to complete the entire process on the bogie 60 while operating in the same manner as the hoist 30 (40) Thereby placing the object P to be treated.

Here, the first cross girder 20 and the second cross girder 70 are brought into contact with each other at the check position (⑦). For example, in order to smoothly operate the second cross girder 70, It is preferable to set it to wait between the first and second terminals 160. [

Thereafter, after the cleaned acid treatment object P is seated on the inspection table 150, the second cross girder 70 moves by a predetermined distance S7 to suspend the acid treatment object P, And is moved by a predetermined distance S8 in the opposite direction to perform hot water washing. And then moves to the loading / unloading position (2) by a predetermined distance S9 to place the object P on which the acid processing object P having completed all the processing steps is placed on the truck 60. Then, (S10) and returns to the initial position.

In the case where two cross girders 20 and 70 are provided as described above, the acid processing time is shortened by about 20% or more compared to the case where all the steps are performed by only the first cross girder 20, There is an advantage that sufficient safety can be ensured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but all changes and modifications that come within the scope of the appended claims are intended to be embraced therein .

10: guide rail 20: first cross girder
21: first traveling means 22: first traveling motor
23: first encoder 30, 40; The first and second hoists
31, 41: first and second winch motors 32, 42: second and fourth encoders
33, 43: first and second feed motors 34, 44: third and fifth encoder
35, 45: first and second wire ropes 36, 46: first and second hooks
50: hanger 52: reinforcing rib
55: Sling Band 60: Loading / unloading carriage
61: railway rail 70: second cross girder
71: second traveling means 72: second traveling motor
73: sixth encoder 80, 90: third and fourth hoists
81, 91: Third and fourth winch motors 82, 92: Seventh and ninth encoders
83, 93: third and fourth feed motors 84, 94: eighth and tenth encoder
100: control unit 101: operation display panel
110: Pickling baths 120 to 140: First to third water baths
150: Inspection stand 160: Hot water tank
L: Acid tax W: Tax amount

Claims (4)

An acid treatment tank group in which a plurality of water treatment tanks each filled with a pickling solution and a hot water tank filled with hot water at a predetermined temperature are sequentially arranged;
A check table disposed between the water bath and the hot water bath and having high pressure cleaning means;
A loading / unloading truck arranged so as to be able to enter and exit between the water tank and the inspection table to load / unload the object to be acid treated;
A pair of guide rails arranged parallel to the predetermined height along the arrangement direction of the acid treatment tank group;
Wherein the control unit is provided with a first running means and is reciprocating along the guide rail, wherein the control unit starts at a loading / unloading carriage position by a predetermined control signal, A first cross girder for stopping for a set time of the loading / unloading bogie and returning to the loading / unloading bogie position;
The first cross girder, the first cross girder, the first cross girder, and the first cross girder. The first cross girder is provided with first and second conveying means, First and second hoists supporting the hoist;
A position value of each processing tank, loading / unloading bogie, and inspection zone of the acid treatment tank group, and elevation height values of the first and second winch means are stored, and a predetermined control program is built in, An operation display panel for automatically controlling the driving of the first running means, the first and second conveying means of the first and second hoists, and the first and second winch means and setting and displaying the detailed operation for each process And a control unit
And a stainless steel automatic acid processing apparatus. The method according to claim 1,
A second cross girder for reciprocating along the guide rails provided with a second running means controlled by the control unit, third and fourth conveying means spaced apart from the second cross girder and controlled by the control unit, Third and fourth hoists having third and fourth winch means, respectively,
The first cross girder moves to the check stand position and then returns to the loading / unloading carriage position, and the second cross girder starts from the check stand position and is moved to a position corresponding to the hot water tank for a predetermined set time And then moves to the loading / unloading carriage position
And a stainless steel automatic acid processing apparatus. The method according to claim 1 or 2,
A hanger having a plate-like body provided with longitudinal reinforcing ribs,
At least two sling bands for hanging an object to be acid-
And a hanger means for holding the hanger means,
In the hanger body,
A plurality of connection slots are formed on the upper side of which each winch means of the first and second hoists or each winch means of the third and fourth hoists are connected,
And a plurality of fixing holes for fixing the respective sling bands are formed on the lower side so as to be arranged in the longitudinal direction
And a stainless steel automatic acid processing apparatus. The method according to claim 1 or 2,
Wherein the object to be treated is a stainless steel pipe,
The object to be acid treated is maintained in a state of being tilted at a predetermined angle at the time of getting in and out of each treatment tank of the acid treatment tank group and returning horizontally after completion of water intake and outflow
And a stainless steel automatic acid processing apparatus.

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