Cooling device for head of strip steel between steckel mill racks

Abstract

The utility model relates to a strip steel head cooling device between steckel mill racks, which comprises a spraying device positioned between a flying shear and a dephosphorization device, the spraying device comprises spraying pipes positioned at the upper end and the lower end of strip steel, and the spraying pipes are provided with a plurality of nozzles which are arranged along the conveying direction of the strip steel and are used for spraying cooling water to the strip steel. The spraying pipe is arranged in front of the flying shear rear dephosphorization device, spraying cooling is only conducted on the head of strip steel from the upper direction and the lower direction through the spraying pipe, the head-tail temperature difference is reduced, secondary oxide skin pressing-in caused by the high temperature of the head of the steel strip and thickness fluctuation influenced by the large head-tail temperature difference are avoided, and therefore the production requirement is met; through the arrangement of a connector and a corrugated pipe, the distance between the two nozzles can be conveniently adjusted; the distance between every two adjacent sliding blocks is adjusted by driving the air cylinders to stretch out and draw back, so that the distance between the nozzles is conveniently and rapidly adjusted, and the length range of the spray cooling strip steel is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rolling steel, especially to the field of rolling steel cooling technology, specifically refers to a furnace volume rolling mill rack interval strip head cooling device. BACKGROUND

[0002] Strip steel is a kind of steel plate with thin thickness, narrow width and very long length. Its width is generally 20mm-200mm. It is supplied in coils, and its specification is expressed by thickness x width. According to the quality of steel, it is divided into high-quality and ordinary strip steel. According to the rolling method, it is divided into hot rolling and cold rolling, which are called hot rolled strip steel and cold rolled strip steel respectively. The thickness of hot rolled ordinary strip steel is 2mm-6mm, and the thickness of cold rolled strip steel is generally 0.05mm-3.60mm. Strip steel can be made of plain carbon steel, carbon steel, spring steel, tool steel, stainless steel, etc. It is widely used in the manufacture of welded pipes, clamps, gaskets, spring sheets, saw blades, blades, etc.

[0003] In the production process of strip steel, the stainless steel rolling mill has one rough rolling mill, four furnace volume and continuous rolling finishing mills, and no hot coil box. The temperature difference between the head and tail of the intermediate blank is greater than 100℃. In order to ensure that the minimum temperature of the tail meets the process requirements, the temperature of the head after phosphorus removal is still too high, which is more likely to generate secondary oxide skin. When the furnace volume rolling mill is rolled, it is pressed into the matrix. The surface quality defects of the steel strip cannot be eliminated during subsequent pickling, which affects the physical quality of the steel strip and the use of customers. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a furnace volume rolling mill rack interval strip head cooling device in view of the deficiency of prior art. The device is provided with a spray pipe before the phosphorus removal machine to cool the head of the strip during rolling, reduce the temperature difference between the head and tail, and avoid the secondary oxide skin from being pressed into the head due to high temperature and the thickness fluctuation caused by the large temperature difference between the head and tail.

[0005] The utility model is implemented by the following technical scheme. A furnace volume rolling mill rack interval strip head cooling device comprises a spraying device between a flying shear machine and a phosphorus removal device. The spraying device comprises spray pipes at the upper end and the lower end of the strip. The spray pipes are provided with a plurality of nozzles arranged along the conveying direction of the strip and spraying cooling water to the strip.

[0006] In use, the spray pipe is arranged before the phosphorus removal device after the flying shear machine. The head of the strip is cooled by the spray pipe from the upper and lower directions to reduce the temperature difference between the head and tail, avoid the secondary oxide skin from being pressed into the head due to high temperature, and avoid the thickness fluctuation caused by the large temperature difference between the head and tail, thereby meeting the production requirements.

[0007] As a preferred embodiment, the spray pipe comprises joints provided with nozzles and corrugated pipes connecting adjacent two joints.

[0008] The preferred embodiment is convenient to adjust the distance between the two nozzles by the setting of the joint and the bellows.

[0009] As preferred, the joint is connected with a sliding block sliding on a sliding rail through a supporting rod, the sliding rail extends along the conveying direction of the strip steel, a pneumatic cylinder is arranged between the two adjacent supporting rods, the base of the pneumatic cylinder is hinged with one supporting rod, the extending shaft of the pneumatic cylinder is hinged with the other supporting rod, and the sliding block at the head or tail end is bolted on the sliding rail.

[0010] The preferred embodiment is convenient to adjust the distance between the two nozzles by the setting of the joint and the bellows.

[0011] As preferred, the front end surface of the sliding block is fixedly connected with a first sleeve pipe extending forward and sleeving on the telescopic pipe, the rear end surface of the sliding block is fixedly connected with a second sleeve pipe extending backward and sleeving on the telescopic pipe, the first sleeve pipe and the second sleeve pipe are arranged in line, and the diameter of the first sleeve pipe is larger than that of the second sleeve pipe.

[0012] The preferred embodiment is convenient to adjust the distance between the two nozzles by the setting of the joint and the bellows.

[0013] As preferred, the upper sliding rail is fixedly connected in a downward opening V-shaped shielding plate, and the opening width of the shielding plate is larger than the width of the strip steel.

[0014] The preferred embodiment is convenient to adjust the distance between the two nozzles by the setting of the joint and the bellows.

[0015] As preferred, a water collecting groove is arranged on the ground below the shielding plate, the lower sliding rail is supported in the water collecting groove through a lower stand column, and the width of the water collecting groove is larger than the opening width of the shielding plate.

[0016] The preferred embodiment is convenient to adjust the distance between the two nozzles by the setting of the joint and the bellows.

[0017] As preferred, a drainage groove is arranged on the water collecting groove and extends forward or backward, and the bottom surface of the water collecting groove is an inclined surface inclined to the drainage groove.

[0018] The preferred embodiment is convenient to adjust the distance between the two nozzles by the setting of the joint and the bellows.

[0019] The beneficial effects of this utility model are as follows: A spray pipe is installed before the descaling device after the flying shear. The spray pipe sprays the strip head only from both top and bottom directions to cool it down, reducing the temperature difference between the head and tail. This avoids the secondary oxide scale pressing in caused by the high temperature at the head of the strip and the thickness fluctuations affected by the large temperature difference between the head and tail, thus meeting production requirements. The joint and corrugated pipe make it easy to adjust the distance between the two nozzles. The extension and retraction of the drive cylinder adjusts the distance between two adjacent sliders, which facilitates the quick adjustment of the nozzle spacing and thus allows for the adjustment of the length range of the sprayed cooling strip. Attached Figure Description

[0020] Figure 1 This is a front view of the structure of this utility model;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a side view of the structure of this utility model;

[0023] As shown in the figure:

[0024] 1. Spray pipe, 2. Steel strip, 3. Joint, 4. Corrugated pipe, 5. Nozzle, 6. Slider, 7. Slide rail, 8. Cylinder, 9. Baffle plate, 10. Water collection tank, 11. First sleeve, 12. Second sleeve, 13. Support rod. Detailed Implementation

[0025] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0026] See attached document Figures 1-3 This utility model discloses a strip head cooling device between stands of a hot rolling mill, which includes a spray device located between a flying shear and a descaling device. The spray device includes spray pipes 1 located at the upper and lower ends of the strip. The spray pipes 1 are provided with a plurality of nozzles 5 arranged along the strip conveying direction and spraying cooling water onto the strip. The nozzles 5 are flat fan-shaped nozzles with a scattering angle of 30°~120° and the spacing between two adjacent nozzles 5 is the same.

[0027] The spray pipe 1 includes a connector 3 with a nozzle 5 and a corrugated pipe 4 connecting two adjacent connectors 3. The connector 3 is tubular, and the nozzle 5 is fixedly attached to the circumference of the connector 3. The connector 3 has a through hole communicating with the nozzle 5. The connector 3 is connected to a slider 6 that slides on a slide rail 7 via a support rod 13. The slide rail 7 extends along the conveying direction of the strip steel. A cylinder 8 is provided between two adjacent support rods 13. The base of the cylinder 8 is hinged to one support rod 13, and the extension shaft of the cylinder 8 is hinged to the other support rod 13. The slider 6 located at the beginning or end is bolted to the slide rail 7.

[0028] The front end surface of the sliding block 6 is fixed with a first sleeve pipe 11 extending forward and sleeving on the telescopic pipe, and the rear end surface of the sliding block 6 is fixed with a second sleeve pipe 12 extending rearward and sleeving on the telescopic pipe, the first sleeve pipe 11 and the second sleeve pipe 12 are arranged in line, and the diameter of the first sleeve pipe 11 is larger than that of the second sleeve pipe 12.

[0029] The upper sliding rail 7 is fixed in the downwardly open V-shaped shielding plate 9, the opening width of the shielding plate 9 is larger than the width of the strip steel, and the shielding plate 9 is installed on the support through the upper stand column.

[0030] The water collecting groove 10 is arranged below the shielding plate 9 on the ground, and the lower sliding rail 7 is supported in the water collecting groove through the lower stand column, and the width of the water collecting groove 10 is larger than the opening width of the shielding plate 9.

[0031] The water collecting groove 10 is also provided with a drainage groove extending forward or rearward, and the bottom surface of the water collecting groove 10 is an inclined surface inclined to the drainage groove.

[0032] The steel pipe is connected with the two spray pipes 1 through the steel pipe connected with the two spray pipes 1, respectively, the manual regulating gate valve is installed on the steel pipe, the water quantity can be manually adjusted, the pneumatic balance stop valve is also installed on the steel pipe and located behind the manual regulating gate valve, the opening and stopping of the cooling water can be controlled, and the spraying time length can be selected according to the intermediate blank temperature.

[0033] Particularly, referring to the accompanying drawings Figure 1 The right side is front, and the left side is rear.

[0034] The utility model discloses a front spray pipe 1 is arranged in the phosphorus removal device of flying shear, and the head of strip steel is only sprayed and cooled from two directions of up and down through the spray pipe 1, the head and tail temperature difference is reduced, the secondary oxide skin pressure of the high temperature of the head of steel strip is avoided, and the thickness fluctuation of the head and tail temperature difference is influenced, thereby meeting the production demand, the distance between the two nozzles 5 is convenient for adjusting through the setting of the joint 3 and the bellows 4, the distance between the adjacent two sliding blocks 6 is adjusted through the telescopic of the drive cylinder 8, thereby the interval between the nozzles 5 is convenient for adjusting quickly, and the length range of the spray cooling strip steel is adjusted.

[0035] After the scheme is adopted, the opening rolling temperature control ability is enhanced, the buckling head phenomenon is obviously reduced, the same plate temperature difference is reduced, the head oxide skin pressure is obviously improved, the control of the coiling laminar flow temperature is facilitated, the performance of the product is more stable, the production rhythm is accelerated, the hourly output is increased, the energy consumption is reduced, the same plate thickness difference caused by the temperature fluctuation is reduced, and the steel strip quality is ensured.

[0036] Of course, the above description is also not limited to the above examples, the technical features not described in the utility model can be realized by or using the prior art, which will not be repeated here; the above embodiments and drawings are only used to illustrate the technical scheme of the utility model and are not a limitation on the utility model, the utility model has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims

1. A device for cooling the head of a strip between stands of a Steckel mill, characterized in that: The spray device is arranged between the flying shear and the phosphorus removal device, and comprises spray pipes (1) arranged at the upper end and the lower end of the strip, and a plurality of nozzles (5) arranged on the spray pipes (1) and spraying cooling water to the strip along the conveying direction of the strip. The spray pipe (1) comprises a joint (3) provided with the nozzles (5) and a corrugated pipe (4) connecting two adjacent joints (3). The joint (3) is connected with a sliding block (6) sliding on a sliding rail (7) through a support rod (13), the sliding rail (7) extends along the conveying direction of the strip, a gas cylinder (8) is arranged between two adjacent support rods (13), the base of the gas cylinder (8) is hinged to one support rod (13), the extending shaft of the gas cylinder (8) is hinged to the other support rod (13), and the sliding block (6) located at the head end or the tail end is bolted to the sliding rail (7).

2. The interstand strip head cooling device for a Steckel mill as claimed in claim 1, characterized in that: The front end surface of the sliding block (6) is fixedly connected with a first sleeve pipe (11) extending forward and sleeving on the telescopic pipe, the rear end surface of the sliding block (6) is fixedly connected with a second sleeve pipe (12) extending backward and sleeving on the telescopic pipe, the first sleeve pipe (11) and the second sleeve pipe (12) are arranged in line, and the diameter of the first sleeve pipe (11) is greater than that of the second sleeve pipe (12).

3. The interstand strip head cooling device for a Steckel mill as claimed in claim 1, characterized in that: The upper sliding rail (7) is fixedly connected in the shielding plate (9) which is downwardly and V-shaped, and the opening width of the shielding plate (9) is greater than the width of the strip.

4. The interstand strip head cooling device of a Steckel mill as claimed in claim 3, characterized in that: The water collecting groove (10) is arranged directly below the shielding plate (9) on the ground, the lower sliding rail (7) is supported in the water collecting groove through a lower stand column, and the width of the water collecting groove (10) is greater than the opening width of the shielding plate (9).

5. The interstand strip head cooling device of a Steckel mill as claimed in claim 4, characterized in that: The water collecting groove (10) is further provided with a drainage groove extending forwardly or rearwardly, and the bottom surface of the water collecting groove (10) is an inclined surface inclined to the drainage groove.

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