CN221028631U

CN221028631U - Post-plating cooling device for hot galvanizing of steel strip

Info

Publication number: CN221028631U
Application number: CN202322972386.XU
Authority: CN
Inventors: 郭庆峰; 伍永锐; 刘振东; 朱克永
Original assignee: Ningxia Jianlong Special Steel Co ltd
Current assignee: Ningxia Jianlong Special Steel Co ltd
Priority date: 2023-11-03
Filing date: 2023-11-03
Publication date: 2024-05-28
Anticipated expiration: 2033-11-03

Abstract

A cooling device after plating of steel band hot dip galvanizing belongs to the hot dip galvanizing field of steel band, and comprises a first air cooling section, a second air cooling section and a water cooling section, wherein the first air cooling section, the second air cooling section and the water cooling section are distributed from bottom to top along the height direction of a steel structure platform, the water cooling section is positioned on an operation platform at the top of the steel structure platform, after hot dip galvanizing is performed on the steel band in a galvanizing pot, the steel band is cooled by blowing through bellows in the first air cooling section and the second air cooling section from bottom to top in sequence, and then enters cooling water of the water cooling section for final cooling. The utility model utilizes the steel structure platform at one side of the galvanized pot to arrange the air cooling section at the side surface of the steel structure platform and the water cooling section at the top of the steel structure platform, thereby saving the occupied area and avoiding the contact between the roller way and the galvanized layer in the air cooling section.

Description

Post-plating cooling device for hot galvanizing of steel strip

Technical Field

The utility model relates to the field of steel strip galvanization, in particular to a cooling device after galvanization of steel strip galvanization.

Background

Galvanized steel strip is produced by pickling, galvanizing, packaging and other steps, and has excellent anticorrosive performance, so that it is widely used. The method is mainly used for manufacturing metal products which are cold-processed and are not galvanized any more, such as light steel keels, guard rail net peach type columns, water tanks, roller shutter doors, bridge frames and other metal products.

The galvanization of the steel strip is generally carried out in a galvanization pot, and the galvanized steel strip is finished in the galvanization pot, wherein the temperature is generally above 400 ℃, and the steel strip needs to be cooled for subsequent processing.

At present, when galvanized steel strips are continuously produced, a roller way type cooling technology is generally adopted, namely, after galvanized steel strips are galvanized in a galvanized pot, the galvanized steel strips are directly conveyed to the next working procedure along a roller way, in the conveying process, air is blown to the surface of the galvanized steel strips by using an air box to cool down, after the galvanized steel strips are cooled to a certain extent, the effect of continuously using air cooling becomes unsatisfactory, and at the moment, the galvanized steel strips enter a water cooling section, namely, the roller way immerses the galvanized steel strips in a cooling water tank, so that the whole cooling is completed.

The roller way type air cooling and water cooling combined mode has the advantages that firstly, the occupied area is large, secondly, the galvanized layer on the surface of the steel strip just coming out of the galvanized pot is not solidified yet, and the galvanized layer is directly contacted with the roller way, so that the galvanized layer on the surface of the steel strip is damaged.

Disclosure of utility model

In order to solve the problems of large occupied area and damage to a galvanized layer caused by a roller way in combination of roller way type air cooling and water cooling in the prior art, the utility model provides a cooling device after galvanizing of a steel strip.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a cooling device after plating of steel band hot-galvanize, this cooling device after plating sets up on the steel construction platform of galvanized pot one side, including the first wind cooling section that distributes from bottom to top along steel construction platform direction of height, second wind cooling section and be in the water-cooling section on the steel construction platform top operation platform, after the hot-galvanize in the steel band from the galvanized pot, the cooling water that enters into the water-cooling section again after the wind-box in first wind cooling section, the second wind cooling section bloies cooling in proper order from bottom to top, finally cools off.

As an optimization scheme of the cooling device after plating of the hot galvanizing of the steel belt, bellows in the first air cooling section and the second air cooling section are arranged along the height direction of the side surface of the steel structure platform, a plurality of groups of annular exhaust pipes are arranged on the bellows along the height direction, each group of annular exhaust pipes are communicated with the bellows, a purging space for the steel belt to pass through is formed inside, and the bellows purges compressed air to the surface of the steel belt passing through the purging space through air holes on the annular exhaust pipes.

As another optimization scheme of the cooling device after plating of hot galvanizing of the steel belt, the annular exhaust pipe comprises two hollow supporting pipes and two air distribution pipes, wherein one end of each hollow supporting pipe is communicated with the air box, the other end of each hollow supporting pipe is communicated with two ends of one air distribution pipe, the other air distribution pipe is positioned between the two hollow supporting pipes, the end of each air distribution pipe is communicated with the two hollow supporting pipes, and a purging space for the steel belt to pass through is formed between the two air distribution pipes; and wind holes facing the purging space are distributed on the two wind distribution pipes.

As another optimization scheme of the cooling device after plating of hot galvanizing of the steel belt, a plurality of rows of air holes are distributed on the air distribution pipe, each air hole extends along the width direction of the steel belt, the direction of one air hole is horizontal and vertical to the surface of the steel belt, at least two air holes are obliquely upwards blown to the surface of the steel belt, and at least two air holes are obliquely downwards blown to the surface of the steel belt.

As another optimization scheme of the cooling device after plating of hot galvanizing of the steel belt, the water cooling section comprises a cooling water tank filled with cooling water, a transmission roller set is arranged in the cooling water tank, an inlet guide roller and an outlet guide roller are respectively arranged at two ends of the transmission roller set, the steel belt enters the cooling water tank through the inlet guide roller, passes through the transmission of the transmission roller set and then passes out of the outlet guide roller.

As another optimization scheme of the cooling device after plating of hot galvanizing of the steel strip, an adjusting transition section is arranged between the second air cooling section and the water cooling section, and the adjusting transition section adjusts the steel strip from a vertical state to an inclined or horizontal state so as to enable the steel strip to smoothly enter the water cooling section.

As another optimization scheme of the cooling device after plating for hot galvanizing of the steel strip, the adjusting transition section comprises a guide roller arranged at the edge of the operation platform and a transition roller positioned on the operation platform, and the steel strip is lifted to a height through the transition roller after being turned by the guide roller, so that the steel strip enters the water cooling section in an inclined state or a horizontal state.

As another optimization scheme of the cooling device after plating of hot galvanizing of the steel belt, a water distribution pipe is arranged above the adjustment transition section, a plurality of atomizing spray pipes are distributed on the water distribution pipe along the length direction of the water distribution pipe, each atomizing spray pipe extends along the width direction of the steel belt, and atomized cooling water is sprayed on the surface of the steel belt.

As another optimization scheme of the cooling device after plating of hot galvanizing of the steel strip, the water distribution pipe is communicated with the water discharge end of a water pump, and the water inlet end of the water pump is used for extracting water of the water cooling section so as to enable the water of the water cooling section to be in a flowing state.

As another optimization scheme of the cooling device after plating of hot galvanizing of the steel strip, a water storage area is formed below the adjusting transition section.

Compared with the prior art, the utility model has the following beneficial effects:

1) According to the utility model, the steel structure platform is arranged on one side of the galvanized pot, the air cooling section is arranged on the side surface of the steel structure platform, and the water cooling section is arranged on the top of the steel structure platform, so that the end part of the steel strip coming out of the galvanized pot needs to be fixed during initial production, mechanical equipment such as a crane is adopted to hoist the steel strip to sequentially pass through the air cooling section and the water cooling section, and a subsequent series of procedures, and when the steel strip passes through the air cooling section, the air cooling section does not have a roller way, so that the steel strip is in a suspended state, the occupied area is saved, and the contact between the roller way and a galvanized layer is avoided, so that the galvanized layer is damaged; when the steel strip is lifted to the water cooling section, the steel strip is primarily cooled and is contacted with the roller way at the moment, so that the galvanized layer is not damaged;

2) According to the utility model, the adjusting transition section is arranged between the water cooling section and the air cooling section, so that the steel belt is changed into a gentle state from a vertical state and then enters the water cooling section for water cooling, the steel belt is prevented from being damaged by excessive bending, the atomizing spray pipe is arranged at the adjusting transition section, and cooling water is sprayed onto the steel belt in an atomized small water drop mode for cooling, so that the cooling speed is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic structural view of an air cooling section;

FIG. 3 is a schematic view of a blowing of steel strips by a wind distribution pipe;

FIG. 4 is a schematic top view of a ducted and steel strip;

FIG. 5 is a schematic view of the structure of the water cooling section;

Reference numerals: 1. galvanized pot, 2, steel strip, 3, steel structure platform, 301, operation platform, 4, first wind cooling section, 5, second wind cooling section, 6, water cooling section, 601, cooling water tank, 602, lower compression roller, 603, inlet guide wheel, 604, outlet guide wheel, 7, annular exhaust pipe, 701, support pipe, 702, air distribution pipe, 703, purge space, 8, bellows, 9, adjustment transition section, 901, guide wheel, 902, transition wheel, 903, water storage area, 904, water pump, 905, water distribution pipe, 906, atomizing spray pipe.

Detailed Description

The technical scheme of the utility model is further elaborated below by combining specific embodiments, the utility model is only suitable for continuously producing hot dip galvanized steel strips, and the parts which are not clarified in the following embodiments of the utility model, such as the model of a galvanized pot, parameters of hot dip galvanizing, the structure of a bellows, selection of a fan, how the steel strips pass through the galvanized pot and then rise on a steel structure platform, and rely on power continuous production and the like, are all considered as the prior art known or should be known by the person skilled in the art.

Example 1

As shown in fig. 1, the post-plating cooling device for hot galvanizing of the steel strip is arranged on a steel structure platform 3 at one side of a galvanized pot 1, the galvanized pot 1 adopts the existing equipment, the steel structure platform 3 is built according to the existing equipment, and the height of the steel structure platform is generally not less than 30 meters, so that the first air cooling section 4 and the second air cooling section 5 are ensured to have enough lengths; of course, the steel structure platform 3 can be divided into multiple layers, and each layer has different purposes; the cooling device after plating comprises a first air cooling section 4, a second air cooling section 5 and a water cooling section 6, wherein the first air cooling section 4 and the second air cooling section 5 are distributed from bottom to top along the height direction of the steel structure platform 3, the water cooling section 6 is positioned on an operation platform 301 at the top of the steel structure platform 3, the first air cooling section 4 and the second air cooling section 5 are driven by a wind box 8 and a fan matched with the wind box 8, the bottom end of the first air cooling section 4 is generally about 2 meters away from the top of the galvanized pot 1, and the first air cooling section 4 and the second air cooling section 5 can be directly connected or can form a space in the middle; the first air cooling section 4 and the second air cooling section 5 are arranged along the side surface of the steel structure platform 3 and are fixedly installed with the steel structure platform 3, related fan equipment is fixed in the steel structure platform 3, after hot galvanizing is carried out on the steel strip 2 from the galvanization pot 1, the steel strip 2 is blown and cooled by the bellows 8 in the first air cooling section 4 and the second air cooling section 5 from bottom to top in sequence, then the steel strip 2 enters into cooling water of the water cooling section 6 for final cooling, the technological parameters such as wind pressure, wind speed, wind quantity and the like of the first air cooling section 4 and the second air cooling section 5 can be adjusted and set according to specific production technological parameters, the requirement is finally met, the temperature of the steel strip 2 is reduced to about 250 ℃ after the steel strip 2 is blown and cooled by the second air cooling section 5, and the temperature of the steel strip 2 is reduced to about 140 ℃; the essence of the water cooling section 6 is that the steel strip 2 is immersed into cooling water by using a roller way to cool, so that a water cooling box or a cooling pool with any structure can be arranged according to specific conditions, such as the length, the depth, the width and the like.

The above is a basic embodiment of the present utility model, and further improvements, optimizations and limitations can be made on the above basis, so as to obtain the following examples:

Example 2

The main structure of the first air-cooling section 4 and the second air-cooling section 5 is the same as that of the embodiment 1, and the improvement points are that: as shown in fig. 1 and 2, the windboxes 8 in the first air cooling section 4 and the second air cooling section 5 are arranged along the height direction of the side surface of the steel structural platform 3, that is, along the side surface of the steel structural platform 3, which is close to the galvanized pot 1, a plurality of groups of annular exhaust pipes 7 are arranged on the windboxes 8 along the height direction, each group of annular exhaust pipes 7 is communicated with the windboxes 8, a purging space 703 for the steel strip 2 to pass through is formed inside, the annular exhaust pipes 7 are hollow pipes in nature, air holes are formed in partial areas, a cavity for allowing the steel strip 2 to pass through is formed in the middle, and when the steel strip 2 passes through, the steel strip 2 is blown and cooled, the shape is generally rectangular, the length is longer than the width of the steel strip 2, and the width is required to allow the steel strip 2 to have a certain activity allowance, that is still not touched by the annular exhaust pipes 7 when the steel strip 2 shakes due to mechanical reasons during running, and the windboxes 8 purge compressed air to the surfaces of the steel strip 2 passing through the purging space 703 through the air holes on the annular exhaust pipes 7, as shown in fig. 3.

In this embodiment, the plurality of groups of annular exhaust pipes 7 of the first air cooling section 4 gradually increase the air output along the height direction from bottom to top; the air output of the second air cooling section 5 is larger than that of the first air cooling section 4.

In this embodiment, as shown in fig. 4, the annular exhaust duct 7 includes two hollow support pipes 701 and two air distribution pipes 702, the four pipes are all stainless steel pipes and are spliced into a rectangle, and the two hollow support pipes 701 and the two air distribution pipes 702 are all located on the same horizontal plane so as to keep vertical to the steel strip 2, wherein one end of the two hollow support pipes 701 is communicated with the air distribution pipe 8, the other end is communicated with two ends of one air distribution pipe 702 to form a horizontal structure similar to a U shape, the other air distribution pipe 702 is located between the two hollow support pipes 701, and the end is communicated with the two hollow support pipes 701, the compressed air in the air distribution pipe 8 is respectively conducted into the two air distribution pipes 702 through the hollow support pipes 701 and then is discharged through air holes in the air distribution pipes 702, a purge space 703 for the steel strip 2 to pass through is formed between the two air distribution pipes 702, and the size of the purge space 703 is required to fully meet the running requirement of the steel strip 2, even if the steel strip 2 is subject to shaking due to mechanical vibration and the like, collision with the air distribution pipes 702 or the hollow support pipes 702 does not occur; the two air distribution pipes 702 are distributed with air holes facing the blowing space 703, the length of the air distribution pipe 702 exceeds the width of the steel belt 2, and the cross section of the air distribution pipe 702 can be elliptical, round or rectangular, preferably round or elliptical, so that a plurality of rows of air holes are arranged on one side of the air distribution pipe and blown to the surfaces of different positions of the steel belt 2.

In this embodiment, as shown in fig. 3, a plurality of rows of air holes are distributed on the air distribution pipe 702, each air hole extends along the width direction of the steel strip 2, and the direction of one air hole is horizontal and perpendicular to the surface of the steel strip 2, at least two air holes are oriented to blow obliquely upward to the surface of the steel strip 2, and at least two air holes are oriented to blow obliquely downward to the surface of the steel strip 2, so that air can be blown in a certain height range at the same time.

Example 3

This embodiment is a limitation of the water cooling section 6 based on embodiment 1, and other structures are the same as those of embodiment 1, and the improvement points are that: the water cooling section 6 may be any water cooling structure, but preferably adopts the following structure: as shown in fig. 5, the water cooling section 6 includes a cooling water tank 601 filled with cooling water, the cooling water tank 601 is generally rectangular, and has a certain length for allowing the steel strip 2 to have enough travel and cooling time under water, the cooling water in the cooling water tank 601 is generally in a circulating state, a guide roller set 602 is disposed in the cooling water tank 601, the guide roller set 602 is generally formed by a row of driven rollers, and is disposed along the length direction of the cooling water tank 601, and may or may not be driven by power, an inlet guide roller 603 and an outlet guide roller 604 are disposed at two ends of the guide roller set 602, respectively, and the inlet guide roller 603 and the outlet guide roller 604 are generally disposed at the top end of the cooling water tank 601, and are preferably driven by power to rotate, thereby assisting the conveying of the steel strip 2, and the steel strip 2 enters the cooling water tank 601 through the inlet guide roller 603, passes through the guide roller set 602, and then passes out of the outlet guide roller 604; in practice, the strip 2 passes over the entrance guide rollers 603, passes under the set of guide rollers 602, and finally passes over the exit guide rollers 604, thus ensuring that the strip 2 is pressed into the cooling water and completely passes through the cooling water tank 601.

Example 4

The present embodiment is an improvement on the basis of embodiment 1, and the main structure is the same as embodiment 1, and the improvement points are that: as shown in fig. 5, an adjusting transition section 9 is disposed between the second air cooling section 5 and the water cooling section 6, the adjusting transition section 9 adjusts the steel strip 2 from a vertical state to be inclined or horizontal so as to enable the steel strip 2 to smoothly enter the water cooling section 6, and prevent the steel strip 2 from being excessively bent, and the essence of the adjusting transition section 9 is at least two guide rollers, preferably the guide rollers are driven by power to rotate;

In this embodiment, the preferred solution for adjusting the transition section 9 is, as shown in fig. 5, to include a guiding roller 901 disposed at the edge of the operation platform 301 and a transition roller 902 disposed on the operation platform 301, where the guiding roller 901 is actually disposed on the side edge of the top of the steel structure platform 3, and the main body of the guiding roller is in a horizontal state, while the transition roller 902 is vertically disposed on the operation platform 301, and the height of the transition roller 902 is lower than that of the water cooling section 6, and after the steel strip 2 is turned by the guiding roller 901, the transition roller 902 is lifted up, so that the steel strip enters the water cooling section 6 in an inclined state or a horizontal state, preferably in an inclined state, and is cooled up into the water cooling section 6.

In this embodiment, in order to further enhance the cooling effect, a water distribution pipe 905 may be optionally disposed above the readjustment transition section 9, the water distribution pipe 905 is actually a stainless steel metal pipe, the length of which is arranged along the trend of the steel strip 2, one water distribution pipe 905 may be optionally disposed, but preferably two water distribution pipes 905 are disposed, the two water distribution pipes 905 are symmetrically disposed at two sides of the width direction of the steel strip 2, the water distribution pipe 905 is communicated with the water outlet of the water pump, a plurality of atomizing nozzles 906 are distributed on the water distribution pipe 905 along the length direction thereof, the distance between two adjacent atomizing nozzles 906 is adjustable along the length direction of the steel strip 2, two ends of the length direction of each atomizing nozzle 906 exceed two sides of the width direction of the steel strip 2 according to the actual situation, a plurality of water spraying holes are distributed on the lower surface of each atomizing nozzle 906, the diameter, the water spraying holes and the shape of each atomizing nozzle 906 may be adjusted according to the actual situation, and each atomizing nozzle 906 extends along the width direction of the steel strip 2 and sprays atomized cooling water onto the surface of the steel strip 2.

In this embodiment, the water distribution pipe 905 is connected to a water discharge end of a water pump 904, and a water inlet end of the water pump 904 extracts water from the water cooling section 6, so that water from the water cooling section 6 is in a flowing state;

In this embodiment, the water-proof treatment is performed below the adjustment transition section 9 to form a water storage area 903, and the water storage area 903 is provided with an edge baffle, so as to mainly prevent the sprayed water from being excessively large, and rust is generated on the steel structure platform 3 after the sprayed water is sprayed on the ground.

Claims

1. The utility model provides a cooling device after plating of steel band hot-galvanize, this cooling device after plating sets up on steel construction platform (3) of galvanized pot (1) one side, its characterized in that: the hot-dip galvanizing device comprises a first air cooling section (4), a second air cooling section (5) and a water cooling section (6) which are distributed from bottom to top along the height direction of a steel structure platform (3), wherein the water cooling section (6) is positioned on an operation platform (301) at the top of the steel structure platform (3), after hot-dip galvanizing is performed on a steel strip (2) from a galvanizing pot (1), the steel strip is cooled by blowing air from bottom to top sequentially through an air box (8) in the first air cooling section (4) and the second air cooling section (5), and then enters cooling water of the water cooling section (6) for final cooling.

2. The post-plating cooling device for hot galvanizing a steel strip according to claim 1, wherein: the bellows (8) in first air cooling section (4), second air cooling section (5) are arranged along the direction of height of steel construction platform (3) side, set up multiunit annular exhaust pipe (7) along the direction of height on bellows (8), and every group annular exhaust pipe (7) all communicate with bellows (8) to form one in inside and supply steel band (2) to pass sweep space (703), bellows (8) sweep the steel band (2) surface that passes through in sweeping space (703) with compressed air through the wind hole on annular exhaust pipe (7).

3. The post-plating cooling device for hot galvanizing a steel strip according to claim 2, wherein: the annular exhaust pipe (7) comprises two hollow support pipes (701) and two air distribution pipes (702), wherein one end of each of the two hollow support pipes (701) is communicated with the air box (8), the other end of each of the two hollow support pipes is communicated with two ends of one of the air distribution pipes (702), the other air distribution pipe (702) is positioned between the two hollow support pipes (701), the end of each of the air distribution pipes is communicated with the two hollow support pipes (701), and a purging space (703) for a steel belt (2) to pass through is formed between the two air distribution pipes (702); and air holes facing the purging space (703) are distributed on the two air distribution pipes (702).

4. A post-plating cooling device for hot galvanizing a steel strip according to claim 3, wherein: the air distribution pipes (702) are provided with a plurality of rows of air holes, each air hole extends along the width direction of the steel belt (2), the direction of one air hole is horizontal and vertical to the surface of the steel belt (2), at least two air holes are obliquely upwards blown to the surface of the steel belt (2), and at least two air holes are obliquely downwards blown to the surface of the steel belt (2).

5. The post-plating cooling device for hot galvanizing a steel strip according to claim 1, wherein: the water cooling section (6) comprises a cooling water tank (601) filled with cooling water, a guide roller set (602) is arranged in the cooling water tank (601), an inlet guide roller (603) and an outlet guide roller (604) are respectively arranged at two ends of the guide roller set (602), a steel belt (2) enters the cooling water tank (601) through the inlet guide roller (603), passes through the transmission of the guide roller set (602) and then passes out of the outlet guide roller (604).

6. The post-plating cooling device for hot galvanizing a steel strip according to claim 1, wherein: an adjusting transition section (9) is arranged between the second air cooling section (5) and the water cooling section (6), and the adjusting transition section (9) adjusts the steel belt (2) from a vertical state to an inclined or horizontal state so as to enable the steel belt to smoothly enter the water cooling section (6).

7. The post-plating cooling device for hot galvanizing a steel strip of claim 6, wherein: the adjusting transition section (9) comprises a guide roller (901) arranged at the edge of the operation platform (301) and a transition roller (902) arranged on the operation platform (301), and after the steel belt (2) is turned by the guide roller (901), the steel belt is lifted by the transition roller (902) to enable the steel belt to enter the water cooling section (6) in an inclined state or a horizontal state.

8. The post-plating cooling device for hot galvanizing a steel strip of claim 6, wherein: a water distribution pipe (905) is arranged above the adjusting transition section (9), a plurality of atomizing spray pipes (906) are distributed on the water distribution pipe (905) along the length direction of the water distribution pipe, each atomizing spray pipe (906) extends along the width direction of the steel belt (2), and atomized cooling water is sprayed on the surface of the steel belt (2).

9. The post-plating cooling device for hot galvanizing a steel strip of claim 8, wherein: the water distribution pipe (905) is communicated with the water discharge end of a water pump (904), and the water inlet end of the water pump (904) is used for extracting water of the water cooling section (6) so as to enable the water of the water cooling section (6) to be in a flowing state.

10. The post-plating cooling device for hot galvanizing a steel strip of claim 8, wherein: a water storage area (903) is formed below the adjustment transition section (9).