CN209854255U - Wringing roller - Google Patents
Wringing roller Download PDFInfo
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- CN209854255U CN209854255U CN201920622104.4U CN201920622104U CN209854255U CN 209854255 U CN209854255 U CN 209854255U CN 201920622104 U CN201920622104 U CN 201920622104U CN 209854255 U CN209854255 U CN 209854255U
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Abstract
The utility model discloses a wringing roller, which belongs to the field of strip steel pickling. This wringing roller is including last wringing roller and lower wringing roller of mutually supporting, it includes roller shaft and last roller main shaft to go up the wringing roller, lower wringing roller includes lower roller body and lower roller main shaft, the axle center department of going up the roller shaft is equipped with a shaft hole that runs through the roller shaft, the axle center department of lower roller body is equipped with a shaft hole that runs through the roller shaft of lower roller, the diameter of going up the roller shaft reduces from its both ends to centre gradually, the diameter of lower roller body increases from its both ends to centre gradually, through setting up the wringing roller and lower wringing roller into concave convex roller complex mode, thereby make belted steel can form one when the wringing roller in the middle of high, the C type warpage that both ends are low, the convenience is to the clearance of the residual on belted steel surface, improve the surface quality of belted steel.
Description
Technical Field
The utility model belongs to belted steel pickling field, more specifically says, relates to a wringing roller and belted steel pickling technology.
Background
The hot rolled strip steel plate coil produced by hot rolling plant is rolled and coiled, and the scale produced on the surface of the strip steel under the corresponding condition can be firmly covered on the surface of the strip steel, and the defect on the surface of the strip steel can be covered.
From the steel rolling point of view, there are problems associated with feeding these iron-scale strips directly to a cold-rolling mill for rolling: firstly, when rolling is carried out under the condition of large amount of pressing, iron scales can be pressed into a matrix of the strip steel, the surface quality and the processing performance of a cold-rolled sheet are influenced, and even waste products are caused; secondly, after the iron scale is crushed, the iron scale enters an emulsion system of the cooling and lubricating roller to damage circulation equipment, so that the service life of the emulsion is shortened; and the cold roll, which is high in surface finish and machining accuracy and expensive, is damaged. Therefore, the surface scale of the strip must be removed before cold rolling to ensure the surface quality of the cold rolled strip produced. In the prior art, the iron oxide scales on the surface of the strip steel are generally removed by a strip steel pickling process.
The strip steel acid pickling process comprises a plurality of procedures of acid pickling, rinsing, squeezing, drying and the like, however, in the actual production, the defects of black spots, black spots and the like are found to be frequently generated on the upper surface of the produced strip steel, and the reasons for generating the defects are obtained after analysis as follows: in the existing strip steel pickling process, a flat roll is basically used as a drying roll, when strip steel circulates between an upper drying roll and a lower drying roll, the strip steel can rub against the middle of a lower roll and generate certain abrasion on the middle of the lower roll due to the weight of the strip steel, so that the middle of the lower roll generates a certain depression, the strip steel can form a C-shaped upwarp with a low middle and two high ends when being extruded by the drying roll, the C-shaped upwarp is not beneficial to flowing of residual acid and ferric oxide powder on the upper surface of the strip steel, and residues are remained on the strip steel to damage the strip steel, so that the defects are overcome, and a method for well solving the problem in the prior art is not provided.
For example, the Chinese patent application number is: CN201310447375.8, published date: patent document 2015 4, month and day 13 discloses an ultra-wear-resistant wiping roller, which comprises the following effective components in parts by mass: 100 parts of HEPA rubber; 25-35 parts of white carbon black; 10-15 parts of titanium dioxide; 4-6 parts of magnesium oxide; 3-5 parts of an accelerant; 2-3 parts of a vulcanizing agent; 3-7 parts of quartz powder. The super-wear-resistant wringing roller has higher wear resistance and longer service life, can be suitable for production environments with high roughness and high tension of the surface of strip steel, and is not easy to generate a large amount of rubber scraps in the friction process of the roller surface and the surface of the strip steel, thereby preventing the defect of foreign matter pressing in on the surface of the strip steel and improving the quality of strip steel products. However, although the wringing roller of the present invention has a certain wear resistance due to the improvement of the material, it inevitably causes the problem of the central portion of the lower wringing roller being dented in actual work, and the above-mentioned surface defect of the strip is liable to occur as long as the fine dents are generated, and the wringing roller keeps the optimum work for a short time. In addition, the material of the wringing roller is a specially designed material which cannot be obtained by purchase, thereby causing more manufacturing cost for the wringing roller.
Also, for example, the Chinese patent application number is: CN201320749162.6, published date: patent literature 8/27/2014 discloses a cold rolling, pickling and squeezing roller device which comprises a columnar roller body and a roller sleeve coated on the outer layer of the roller body, wherein the length of the roller sleeve is more than or equal to that of the roller body, and two ends of the outer surface of the roller sleeve are in a concave arc shape. The utility model discloses a whole surface is incurved concave surface arc structure, and its middle part closely laminates with the middle part of belted steel, and both ends can have the belted steel contact that reduces the thin district with both ends, effectively clears away remaining on belted steel surface to have good crowded dry effect, clear away effectually, effectively reduce belted steel surface and remain, especially avoided the surface residual of belted steel limit portion, reduced the production of defects such as belted steel limit portion yellow rust, improve belted steel pickling quality. However, the device is mainly used for removing the residues on the edge of the strip steel, and the strip steel can also cause abrasion on the middle part of the lower drying roller and form a depression on the middle part of the lower drying roller after working for a long time, so that the strip steel passes through the drying roller to generate C-shaped upwarp with low middle and high two ends, and the device can not solve the problem that the improved residues on the surface of the strip steel are difficult to remove.
In addition, the spray pipe and the gas blowing pipe in the strip steel pickling process are not specifically described in the two devices, but the spray pipe and the gas blowing pipe in the prior art are generally in a straight pipe form, so that the cleaning effect on residues such as acid liquor on the surface of the strip steel is not good.
SUMMERY OF THE UTILITY MODEL
1. Problems to be solved
To the problem that residues such as acidizing fluid, ferric oxide powder are difficult to get rid of among the current belted steel pickling process, influence belted steel surface quality, the utility model provides a wringing roller improves through the structure to the wringing roller, can solve the problem that belted steel surface residue is difficult to get rid of effectively, improves the surface quality of the belted steel that makes.
The utility model also provides a belted steel pickling process, its unique pickling process parameter can get rid of the iron scale on belted steel surface high-efficiently, improves the surface quality of belted steel, and this technology adopts above-mentioned wringing roller to carry out the wringing operation to the belted steel, cooperates through modified shower and gas blow pipe in the subsequent handling to clear away the residue on belted steel surface effectively, further improve the surface quality of belted steel.
2. Technical scheme
In order to solve the above problems, the utility model adopts the following technical proposal.
The utility model provides a wringing roller, includes wringing roller and lower wringing roller, go up the wringing roller including last roller shaft and last roller shaft, lower wringing roller includes lower roller shaft and lower roller shaft, and the axle center department of going up the roller shaft is equipped with a shaft hole that runs through last roller shaft, goes up the roller shaft and passes the shaft hole of going up the roller shaft and be connected with last roller shaft, and the axle center department of lower roller shaft is equipped with a shaft hole that runs through lower roller shaft, and the lower roller shaft passes the shaft hole of lower roller shaft and is connected with lower roller shaft, the diameter of going up the roller shaft reduces from its both ends to the centre gradually, the diameter of lower roller shaft increases from its both ends to the centre gradually.
As a further improvement of the technical scheme, the surface of the upper roller body is coated with an upper roller glue layer corresponding to the shape of the upper roller body, and the surface of the lower roller body is coated with a lower roller glue layer corresponding to the shape of the lower roller body.
As a further improvement of the technical scheme, two sides of the upper roller main shaft and the lower roller main shaft are respectively provided with a retainer ring.
As a further improvement of the technical scheme, the axial lengths of the upper roller body and the lower roller body are 2250-2350 mm, the difference value between the diameter of the middle section of the upper roller body and the diameters of the two ends of the upper roller body is 3.8-4.2 mm, and the difference value between the diameter of the middle section of the lower roller body and the diameters of the two ends of the lower roller body is 3.8-4.2 mm.
A strip steel pickling process comprises the following steps:
acid washing
The strip steel after the annealing treatment enters a pickling tank for pickling to remove the iron oxide scales on the surface of the strip steel;
second, rinsing
Rinsing the pickled strip steel in a rinsing tank, spraying rinsing water from a spray pipe to rinse residues on the surface of the strip steel, and allowing the rinsed rinsing water to flow into the rinsing tank;
third, squeeze the dry
The strip steel passes through a wringing roller on a rinsing tank in the rinsing process, and residual liquid on the surface of the strip steel is squeezed off under the action of the wringing roller;
fourthly, drying
The squeezed strip steel enters a drying device positioned behind the rinsing tank, and the drying device performs drying operation on the surface of the strip steel;
the drying roller in the third step is the drying roller in the technical scheme.
As a further improvement of the technical scheme, the spray pipe in the step two is a V-shaped water pipe arranged above the rinsing tank, and a plurality of nozzles are arranged on the V-shaped water pipe at equal intervals; the bending part of the V-shaped water pipe is arranged in the middle of the rinsing tank, and the opening of the V-shaped water pipe is gradually increased along the movement direction of the strip steel.
As a further improvement of the technical scheme, a connecting rod is arranged between the V-shaped water pipes.
As a further improvement of the technical scheme, the drying equipment in the fourth step comprises a V-shaped air blowing pipe and a steam type drying device which are arranged above the strip steel, wherein an air outlet of the steam type drying device is communicated with an air inlet of the V-shaped air blowing pipe; the bending part of the V-shaped air blowing pipe is arranged in the middle of the width of the strip steel, and the opening of the V-shaped air blowing pipe is gradually increased along the moving direction of the strip steel.
As a further improvement of the technical scheme, hydrochloric acid is adopted as a pickling solution in the step one, and the temperature of the hydrochloric acid is 80-85 ℃.
As a further improvement of the technical scheme, in the second step, the water spraying pressure of the spraying pipe is 0.4-0.6 MPa, and the temperature is 60-85 ℃.
As a further improvement of the technical scheme, the strip steel is made of No. 45 steel.
As a further improvement of the technical scheme, the thickness of the strip steel is 1.5-6 mm, and the width of the strip steel is 850-2000 mm.
As a further improvement of the technical scheme, the temperature of the gas blown out by the V-shaped gas blowing pipe is 100-120 ℃.
3. Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model relates to a wringing roller, which changes the structure of the wringing roller into a concave-convex roller form which is matched up and down, so that when the wringing roller wrings the strip steel, the strip steel can generate elastic deformation within the yield stress to form an arc structure with certain convexity, so that the pickling solution remained on the surface of the strip steel can smoothly flow to the two sides of the strip steel along the radian, in addition, although the middle part of the lower wringing roller can be abraded with the strip steel in the long-term use process, when the abrasion degree does not exceed a certain degree so that the diameter of the middle part of the lower wringing roller is lower than the diameters of the two ends, the wringing roller can still keep the excellent wringing effect on the strip steel, the problem that the traditional flat roller is difficult to remove part of residual acid liquid because of the dent as long as the dent is generated in the middle of the lower roller can not occur, the acid liquid which is difficult to remove is difficult to clean completely in the subsequent cleaning process;
(2) the utility model relates to a wringing roller, the surface of upper and lower wringing roller all wraps the glue film that the shape of one deck and upper and lower wringing roller corresponds, the thickness of each position of this glue film keeps unanimous, therefore the roughness that it formed is the same with the roughness of wringing roller shaft, can keep the good wringing effect to belted steel equally, in addition, the material of this glue film adopts removable wear-resisting material, greatly promoted the life of wringing roller, avoid the condition that the whole root roller need be changed after the wringing roller is impaired, the manufacturing cost of belted steel has been reduced;
(3) the utility model relates to a wringing roller, the retaining ring is respectively sleeved on both sides of the main shaft of the wringing roller, the retaining ring can effectively block the splashing pickling solution extruded to both sides when the wringing roller works, and the pickling solution is prevented from splashing to the equipment on both sides, thereby saving the time and manpower for manually cleaning the pickling solution on the equipment, and avoiding the danger of damaging the equipment by the splashing pickling solution;
(4) the utility model relates to a wringing roller summarizes the roughness scope of suitable wringing roller through a large amount of experiments and production practices, and the belted steel under the wringing roller effect of this kind of specific roughness can not take place the plastic deformation outside the yield stress when keeping the effect of good clearance pickle to make belted steel can automatic recovery become the level and smooth state after the pickling process, guarantee the follow-up processing effect of belted steel and the quality of belted steel, especially, the wringing effect to the belted steel of specific thickness and width is very obvious;
(5) the utility model relates to a strip steel pickling process, which adopts the wringing roller to wring strip steel in the pickling process, can effectively remove the residual pickling solution in the pickling process of the strip steel while ensuring the clear effect of the oxide scales on the surface of the strip steel, and ensure the surface quality of the processed strip steel;
(6) the utility model relates to a strip steel pickling process, change traditional straight tube shower into V font water pipe, and because the bending end of V font water pipe is located the potcher middle part and its opening direction increases gradually along belted steel direction of motion, make belted steel when moving, the middle part of belted steel can contact with spun rinsing water earlier, thereby make the residue at belted steel middle part can flow to the both sides of belted steel under the water pressure of spun rinsing water like pickling solution or iron oxide powder that do not clear up clean in the preceding process, and belted steel further moves, belted steel middle part both sides contact with V font water pipe spun rinsing water gradually, thereby make the residue flow out the belted steel from belted steel both sides step by step, the cleaning performance is splendid, the residue is basically clear, in addition, the utility model discloses still connect a connecting rod between V font water pipe, the effect that this connecting rod played is the same with the effect of stiffening beam, the connection strength of the V-shaped water pipe is effectively enhanced, and the influence on the stability of the water pipe due to the V-shaped structure is prevented;
(7) the utility model relates to a belted steel pickling process, because belted steel can remain the one deck water film on its surface behind the rinsing, so need dry the operation to its surface, through the gas blow pipe with drying equipment reform transform into the V font outlet duct the same with V font water pipe structure and mounting means to make the water on belted steel surface can circulate to the both sides of belted steel under the gaseous effect of V font at the stoving in-process, strengthened drying equipment's drying efficiency and stoving effect effectively through this kind of mode.
Drawings
FIG. 1 is a schematic view of the wringing roller of the present invention;
FIG. 2 is a schematic structural view of the upper wringing roller of the present invention;
FIG. 3 is a schematic structural view of the lower wringing roller of the present invention;
FIG. 4 is a schematic structural diagram of a rinsing section of the present invention;
in the figure: 1. an upper wringing roller; 11. an upper roll body; 12. an upper roll main shaft; 13. an upper roll glue layer; 2. a lower wringing roller; 21. a lower roll body; 22. a lower roll main shaft; 23. a lower roller glue layer; 3. a retainer ring; 4. a wringing roller; 5. a V-shaped water pipe; 51. a connecting rod; 6. Strip steel.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings.
Example 1
As shown in fig. 1, a wringing roller, which is mainly used for wringing residual pickling solution on the surface of a strip steel by vertically extruding the strip steel pickled by a pickling tank, is arranged in a rinsing stage of a strip steel pickling process, and comprises an upper wringing roller 1 and a lower wringing roller 2. Wherein, the upper wringing roller 1 is positioned at the upper end of the plane of the strip steel, and the lower wringing roller 2 is positioned at the lower end of the plane of the strip steel.
The traditional wringing roller generally adopts a flat roller form, the flat roller is mainly characterized by more convenient processing, but because the wringing roller can be worn and torn with the strip steel in the long-term working process, the middle part of the lower wringing roller 2 can be sunken, so that the strip steel can form a C-shaped upwarp with low middle part and high two ends under the extrusion of the upper and lower wringing rollers when passing through the wringing roller, the pickling solution remains in the middle part of the strip steel because of the upwarp radian of the C-shaped upwarp, and the pickling solution is hardly extruded to the two sides of the strip steel by the wringing roller. In the prior art, the problem is generally solved by replacing the material of the drying roll with a wear-resistant material or coating the surface of the drying roll with a wear-resistant layer, but the problem cannot be well solved. The drying roller is still abraded with the strip steel and forms a dent despite being made of wear-resistant materials, and the drying effect of the drying roller on the strip steel is greatly reduced as long as the dent is generated. Therefore, in order to solve the problem, the embodiment effectively solves the problem that the pickling solution is difficult to flow to the two sides of the strip steel due to abrasion between the strip steel and the wringing roller by improving the structure of the wringing roller. The specific structures of the upper squeeze roller 1 and the lower squeeze roller 2 of the present embodiment are described in detail below, respectively.
As shown in fig. 2 and 3, the upper wringing roller 1 includes an upper roller body 11 and an upper roller main shaft 12, a shaft hole penetrating through the upper roller body 11 is formed at the axis of the upper roller body 11, the upper roller main shaft 12 penetrates through the shaft hole of the upper roller body 11 to be connected with the upper roller body 11, the connection mode can adopt a fixed connection mode commonly used in the prior art such as key connection, welding and the like, and the embodiment adopts welding. The upper roll body 11 is a cylindrical structure with a small diameter in the middle and large diameters at two ends, and the diameter of the upper roll body is an arc structure gradually reduced from two ends to the middle. The lower wringing roller 2 comprises a lower roller body 21 and a lower roller main shaft 22, a shaft hole penetrating through the lower roller body 21 is formed in the shaft center of the lower roller body 21, the lower roller main shaft 22 penetrates through the shaft hole of the lower roller body 21 and is connected with the lower roller body 21, and the connecting mode of the embodiment adopts a welding mode. The lower roll body 21 is a cylindrical structure which is large in middle diameter and small in diameter at two ends and is matched with the upper roll body 11, the diameter of the lower roll body is gradually increased from two ends to the middle, and the upper roll body 11 and the lower roll body 21 can be tightly wedged together. The upper drying roller 1 and the lower drying roller 2 are mounted in the same mode, one end of each of the upper drying roller and the lower drying roller is connected with an output shaft of a motor through a bearing, the other end of each of the upper drying roller and the lower drying roller is supported and mounted on the machine frames on two sides of the strip steel through bearings and driven by the motors to rotate, and two ends of each of the drying rollers are located on two sides of the strip steel respectively.
When the wringing roller works, the upper wringing roller 1 and the lower wringing roller 2 are close to each other and extrude the strip steel between the upper wringing roller 1 and the lower wringing roller 2, and because the upper roller body 11 and the lower roller body 21 are of concave-convex roller structures which are matched with each other, the strip steel can form an arc-shaped structure with a middle bulge when passing through the upper wringing roller 1 and the lower wringing roller 2, so that the pickling solution smoothly slides from the middle part of the strip steel to the two sides and flows out of the strip steel, and the risk that the pickling solution remains on the strip steel to damage the strip steel is avoided. In particular, in the form of the concave-convex roller matching, even if the middle part of the roller body 21 of the lower roller still abrades the strip steel, the structure with the convexity can smoothly offset the abrasion of the part, the problem of middle depression formed by abrasion is avoided, the pickling solution on the surface of the strip steel can still smoothly flow out of the strip steel, or the convexity can be ground flat by using the roller for a long time, and the squeezing roller can always keep a better squeezing effect in the period, and the better using time of the squeezing roller is improved by about 3 times compared with the better using time of the common squeezing roller.
However, considering that the strip steel has a certain yield stress, and the strip steel exceeding the yield stress is difficult to recover to a flat state after being deformed, the range of the unevenness of the wringing roller needs to be limited, and the wringing roller has an excellent wringing effect on the strip steel and can ensure that the strip steel can recover to the flat state after being wrung. The steel grade adopted in the embodiment is 45 steel, so the embodiment provides a limit for the roughness of the drying roll by the steel of the steel grade. Through a large number of experiments and production practices, the fact that when the axial length of a roll body of a wringing roll (comprising an upper wringing roll and a lower wringing roll) is within 2250 mm-2350 mm, and the difference value between the diameter of the middle section of the roll body and the diameters of two ends of the roll body is within 3.8 mm-4.2 mm, the wringing effect on strip steel with the thickness within 1.5 mm-6 mm and the width within 850 mm-2000 mm is excellent, the residual pickling solution can be basically clear and clean, and the strip steel can be completely restored to a flat state is discovered. Several sets of specific data are given below:
1) the thickness of the strip steel is 1.5mm, the width of the strip steel is 850mm, the axial length of a roller body of the wringing roller is 2250mm, the difference value between the diameter of the middle section of the roller body and the diameters of the two ends of the roller body is 3.8mm, the pickling solution on the surface of the strip steel is basically clear and clean, and the strip steel can be restored to a flat state;
2) the thickness of the strip steel is 4mm, the width of the strip steel is 1400mm, the axial length of a roll body of the wringing roll is 2300mm, the difference value between the diameter of the middle section of the roll body and the diameters of two ends of the roll body is 4mm, the pickling solution on the surface of the strip steel is basically clear and clean, and the strip steel can be restored to a flat state;
3) the thickness of the strip steel is 6mm, the width of the strip steel is 2000mm, the axial length of a roll body of the wringing roll is 2350mm, the difference value between the diameter of the middle section of the roll body and the diameters of two ends of the roll body is 4.2mm, the pickling solution on the surface of the strip steel is basically clear and clean, and the strip steel can recover to a flat state;
4) the thickness of the strip steel is 1.3mm, the width of the strip steel is 1500mm, the axial length of a roll body of the drying roll is 2200mm, the difference value between the diameter of the middle section of the roll body and the diameters of two ends of the roll body is 3.6mm, part of pickling solution on the surface of the strip steel remains, and the strip steel can recover to a flat state;
5) the thickness of the strip steel is 7mm, the width of the strip steel is 1500mm, the axial length of a roll body of the wringing roll is 2400mm, the difference value between the diameter of the middle section of the roll body and the diameters of two ends of the roll body is 4.5mm, the pickling solution on the surface of the strip steel is basically clear, and part of the strip steel cannot be leveled.
In order to further increase the use effect of the wringing roller, the embodiment also has the advantages that the upper roller glue layer 13 and the lower roller glue layer 23 are respectively coated on the surfaces of the upper roller body 11 and the lower roller body 21, the glue layers are made of wear-resistant materials and matched with the shape of the roller body of the wringing roller, and the thickness of the glue layers at all positions is kept the same, so that the roughness formed by the upper roller glue layer 13 and the lower roller glue layer 23 can be kept consistent with the roughness of the wringing roller, the wringing effect on the strip steel can be kept, the strip steel is in elastic deformation in yield stress, and the service life of the wringing roller is greatly prolonged. In the embodiment, the glue layer is made of the material of the marine dragon, which is also called chlorosulfonated polyethylene.
In addition, because the squeezing roller has a large acting force in the process of squeezing the strip steel, the pickling solution on the surface of the strip steel can splash towards the two sides of the strip steel under the squeezing of the squeezing roller, the pickling solution splashed to the equipment on the two sides of the strip steel can cause damage to the surface of the equipment, and the cleaning is troublesome. Therefore, in the embodiment, the check rings 3 are arranged at the two ends of the upper roll main shaft 12 and the lower roll main shaft 22, and the check rings 3 are in an annular structure and are welded at the two sides of the main shaft of the drying roll. When the wringing roller works, the acid washing solution splashed on the strip steel can be blocked by the retainer ring 3, so that the condition that the splashed acid washing solution damages equipment on two sides of the strip steel is avoided.
In conclusion, the wringing roller of the embodiment can effectively solve the problem that the pickling solution on the surface of the strip steel is difficult to remove due to abrasion between the wringing roller and the strip steel, improves the surface quality of the strip steel, and has extremely long service life.
Example 2
The strip steel pickling process is characterized in that a treated steel strip is 850-2000 mm wide and 1.5-6 mm thick, strip steel with the thickness of 3mm and the width of 1500mm is adopted in the embodiment, the strip steel is No. 45 steel and is mainly used for removing iron oxide scales generated on the surface of the strip steel after annealing treatment and removing residues such as pickling solution, iron oxide powder and the like on the surface of the strip steel in subsequent working procedures, and the strip steel pickling process comprises the following steps:
acid washing
A layer of iron scale is formed on the surface of the hot rolled strip steel, and the iron scale mainly comprises the outermost layer of Fe2O3Fe of the intermediate layer3O4And Fe in the innermost layer2The oxide scale has a great influence on the quality of the strip steel, rolling equipment and the like in the subsequent rolling process of the strip steel, so the oxide scale needs to be removed by acid washing. The traditional acid washing solution generally adopts hydrochloric acid or sulfuric acid, and the hydrochloric acid has the advantages of faster reaction with iron scale and lower cost compared with the sulfuric acidAnd the solubility of the ferric salt generated in the reaction is high, so that the hydrochloric acid is adopted as the pickling solution in the embodiment, and the pickling efficiency of the strip steel can be effectively improved.
The embodiment is provided with three sections of pickling tanks, the concentration of hydrochloric acid in the pickling tanks is gradually increased along the moving direction of the strip steel, and the use standards of the hydrochloric acid in the three sections of pickling tanks are respectively as follows: the hydrochloric acid concentration of the first pickling tank is 35-45 g/l, the hydrochloric acid concentration of the second pickling tank is 50-80 g/l, the hydrochloric acid concentration of the third pickling tank is 100-130 g/l, and the hydrochloric acid temperature in the third pickling tank is controlled to be 80-85 ℃. In the embodiment, a group of hydrochloric acid parameters with prominent pickling effect is adopted, namely the concentration of the hydrochloric acid in the first section is 40g/l, and the temperature is 80 ℃; the concentration of the second-stage hydrochloric acid is 65g/l, and the temperature is 82 ℃; the concentration of the hydrochloric acid in the third section is 115g/l, the temperature is 85 ℃, the hydrochloric acid parameter can efficiently remove the iron scale on the surface of the strip steel, and the pickling efficiency is improved.
Second, rinsing and squeezing
It should be noted that the rinsing and the squeezing are performed simultaneously. As shown in fig. 4, a plurality of groups of wringing rollers 4 are arranged on the rinsing tank at equal intervals along the moving direction of the strip steel 6, and four groups of wringing rollers 4 are adopted in the embodiment. V font water pipe 5 is installed to the potcher top between two sets of adjacent wringing rollers 4, and the department of bending of V font water pipe 5 is the top setting of "V" at the middle part of potcher, and V font water pipe 5 uses the department of bending as the starting point, and the opening extends to belted steel both sides along belted steel 6's direction of motion gradually, has seted up a plurality of nozzles at equal intervals on it. The design of the spray pipes enables the middle part of the strip steel 6 to be contacted with the sprayed rinsing water firstly when the strip steel 6 moves, so that residues in the middle part of the strip steel 6, such as pickling solution or ferric oxide powder which is not cleaned in the previous working procedure, can flow towards the two sides of the strip steel 6 under the water pressure of the sprayed rinsing water. And the strip steel 6 moves further, the two sides of the middle part of the strip steel 6 are gradually contacted with the rinsing water sprayed by the V-shaped water pipe 5, so that the residues flow out of the strip steel 6 from the two sides of the strip steel 6 step by step, the cleaning effect is excellent, and the residues are basically cleaned. However, the water pipes of the V-shaped structure are not stable, so the present embodiment connects one connecting rod 51 between the V-shaped water pipes 5, and the connecting rod 51 has the same effect as the reinforcing beam, thereby effectively reinforcing the connection strength of the V-shaped water pipes 5 and preventing the stability of the water pipes from being affected by the V-shaped structure. The rinsing water sprayed by the spray pipes in the embodiment is desalted water, the spraying pressure is 0.5MPa, the temperature is 70 ℃, and the desalted water under the condition has a good cleaning effect on the surface of the strip steel 6.
It should be noted that, the wringing roller 4 in this step adopts the wringing roller in embodiment 1, and cooperates with the design of the V-shaped water pipe 5 to wash the strip steel 6 for multiple times, so that the cleaning effect on the residue on the surface of the strip steel 6 is excellent, and the residue affecting the subsequent processing of the strip steel 6 is not basically left, thereby improving the quality of the produced strip steel 6. And the last group of wringing rollers 4 are arranged at the outlet of the rinsing tank, and the number of the wringing rollers is three pairs, so that the wringing effect on the residual liquid on the surface of the strip steel is ensured to the maximum extent.
Third, drying
The residues on the surface of the rinsed and squeezed steel strip are basically cleaned, but a water film is inevitably still on the surface, so that the surface of the steel strip needs to be dried. If the residues on the surface of the strip steel in the previous process are not cleaned, the residues are dried and adhered to the surface of the strip steel in the drying step, and the quality of the strip steel is influenced in the subsequent rolling process.
The drying equipment comprises a V-shaped air blowing pipe and a steam type drying device which are arranged above the strip steel, wherein an air outlet of the steam type drying device is communicated with an air inlet of the V-shaped air blowing pipe, the specific arrangement mode of the V-shaped air blowing pipe is the same as the arrangement mode of the V-shaped water pipe 5 in the second step, and the installation mode of the steam type drying device belongs to the common prior art in the strip steel pickling process, so that the detailed description of the installation mode is not carried out, the key improvement of the step is mainly carried out on the V-shaped air blowing pipe, and a row of nozzles are arranged on the V-shaped air blowing pipe at equal intervals. Through the air blowing pipe with the structure, like the V-shaped water pipe 5 in the step two, water can be blown from the middle of the strip steel to the two sides of the strip steel gradually, the surface of the strip steel is dried at the high temperature of the blown gas, the temperature of the gas in the embodiment is 110 ℃, and the drying effect on the surface of the strip steel is excellent.
In conclusion, the strip steel pickling process of the embodiment has unique pickling process parameters, can efficiently remove the iron oxide scales on the surface of the strip steel and improve the surface quality of the strip steel, and the strip steel is squeezed by the squeezing roller of the embodiment 1 and is matched with the improved spray pipe and the improved air blowing pipe in the subsequent process, so that the residues on the surface of the strip steel are effectively removed, and the surface quality of the strip steel is further improved.
The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.
Claims (4)
1. The utility model provides a wringing roller, includes wringing roller (1) and lower wringing roller (2), it includes upper roll shaft (11) and upper roll main shaft (12) to go up wringing roller (1), lower wringing roller (2) are including lower roll shaft (21) and lower roll main shaft (22), the axle center department of upper roll shaft (11) is equipped with a shaft hole that runs through upper roll shaft (11), upper roll main shaft (12) pass the shaft hole of upper roll shaft (11) and be connected with upper roll shaft (11), the axle center department of roll shaft (21) is equipped with a shaft hole that runs through lower roll shaft (21), lower roll main shaft (22) pass the shaft hole of roll shaft (21) down and be connected its characterized in that with lower roll shaft (21): the diameter of the upper roller body (11) is gradually reduced from the two ends to the middle, and the diameter of the lower roller body (21) is gradually increased from the two ends to the middle.
2. A wringer roller as in claim 1, wherein: the surface cladding of going up roller body (11) has one deck and goes up roller glue film (13) corresponding with last roller body (11) shape, the surface cladding of lower roller body (21) has one deck and lower roller glue film (23) corresponding with lower roller body (21) shape.
3. A wringer roller as in claim 1, wherein: and two sides of the upper roll main shaft (12) and the lower roll main shaft (22) are respectively provided with a retainer ring (3).
4. A wringer roller as in any one of claims 1-3, wherein: the axial length of the upper roller body (11) and the lower roller body (21) is 2250-2350 mm, and the difference value between the diameter of the middle section of the upper roller body (11) and the diameter of the two ends of the lower roller body (21) is 3.8-4.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920622104.4U CN209854255U (en) | 2019-04-30 | 2019-04-30 | Wringing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920622104.4U CN209854255U (en) | 2019-04-30 | 2019-04-30 | Wringing roller |
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| CN209854255U true CN209854255U (en) | 2019-12-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930164A (en) * | 2019-04-30 | 2019-06-25 | 马鞍山钢铁股份有限公司 | A kind of squeeze roller and strip pickling technique |
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2019
- 2019-04-30 CN CN201920622104.4U patent/CN209854255U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930164A (en) * | 2019-04-30 | 2019-06-25 | 马鞍山钢铁股份有限公司 | A kind of squeeze roller and strip pickling technique |
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