CN-117123630-B - Heavy H-shaped steel control cooling system and cooling control method

CN117123630BCN 117123630 BCN117123630 BCN 117123630BCN-117123630-B

Abstract

The invention relates to a thick H-shaped steel control cooling system and a cooling control method, belonging to the technical field of H-shaped steel control cooling, and comprising a conveying roller way and a plurality of groups of water spraying components which are arranged at intervals along the length direction of the conveying roller way and surround the periphery of the section of the H-shaped steel along the shape, wherein each water spraying component comprises a side water spraying component which is respectively arranged at two sides of the conveying roller way in a horizontal sliding way, an upper water spraying component which is arranged above the conveying roller way in a lifting way and a lower water spraying component which is arranged in the conveying roller way.

Inventors

CHEN HUI
HE JUNWEI
CHEN ZHONGXUAN
YU HONGYU
LI LIANGJUN
ZHAO QIANCHENG
SHAN MEI
ZHAO XU
LIU YIZE

Assignees

马鞍山钢铁股份有限公司

Dates

Publication Date: 20260512
Application Date: 20230901

Claims (8)

1. The thick H-shaped steel control cooling system is characterized by comprising a conveying roller way and a plurality of groups of water spraying assemblies which are arranged at intervals along the length direction of the conveying roller way and surround the periphery of the section of the H-shaped steel along the shape, wherein each water spraying assembly comprises a side water spraying assembly, an upper water spraying assembly and a lower water spraying assembly, wherein the side water spraying assemblies are respectively arranged on two sides of the conveying roller way in a horizontal sliding manner, the upper water spraying assembly is arranged above the conveying roller way in an up-down lifting manner, and the lower water spraying assembly is arranged in the conveying roller way; The side water spraying assembly comprises a side water spraying tank which is slidably arranged on a rack of the conveying roller way along the width direction of the conveying roller way, a plurality of groups of side nozzle assemblies are arranged on the side water spraying tank, and the outer side of the side water spraying tank is connected with a horizontal telescopic driving component; the outer side of the side water spraying tank is connected with water supply equipment through a water supply pipeline, the inner side of the side water spraying tank is connected with a plurality of groups of side nozzle assemblies through a water suction pump I, and the plurality of groups of side nozzle assemblies are arranged at intervals along the height direction of the inner side of the side water spraying tank; the upper water spraying assembly comprises a water pipe I which is concave along the central line of the conveying roller way, the upper side of the water pipe I is connected with a support frame fixed on the frame through a lifting driving part, and a plurality of groups of upper nozzle assemblies are arranged on the lower side of the water pipe I; The lower water spraying assembly comprises a water passing pipe II protruding upwards along the central line of the conveying roller way, the end part of the water passing pipe II is connected with water supply equipment through a water supply pipeline, the upper side of the water passing pipe II is connected with a plurality of groups of lower nozzle assemblies through a water suction pump III, the plurality of groups of lower nozzle assemblies are arranged at intervals along the upper side of the water passing pipe II along the shape, and the highest point of the plurality of groups of lower nozzle assemblies is not higher than the conveying roller surface of the conveying roller way; The side nozzle assembly, the upper nozzle assembly and the lower nozzle assembly have the same structure and comprise mounting frames fixed on the side water spraying tank, the water pipe I or the water pipe II, a plurality of nozzles are rotatably connected to the mounting frames, and one ends of the nozzles are connected through an angle adjusting mechanism; The angle adjusting mechanism comprises a hinged frame connected between two adjacent nozzles, the nozzle close to one end of the mounting frame is connected with the mounting frame through an adjusting screw rod, and the nozzle close to the other end of the mounting frame is hinged with the mounting frame.
2. The control cooling system for heavy H-shaped steel according to claim 1, wherein the end part of the water pipe I is connected with water supply equipment through a water supply pipeline, the lower side of the water pipe I is connected with a plurality of groups of upper nozzle assemblies through a water suction pump II, and the plurality of groups of upper nozzle assemblies are arranged along the lower side of the water pipe I at intervals along the shape.
3. The control cooling system for the heavy H-shaped steel according to claim 1, wherein one ends of the nozzles are respectively connected with a water outlet branch pipe through hoses, a water pressure regulating valve is arranged in the water outlet branch pipe, the water outlet branch pipes are connected with the side water spraying tank, the water through pipe I or the water through pipe II through a main water inlet pipe after being gathered, and a water suction pump I, a water suction pump II or a water suction pump III is arranged in the main water inlet pipe.
4. The control cooling system for heavy H-shaped steel according to claim 1, wherein the mounting frame comprises two fixing plates fixed on the side water spraying tank, the water passing pipe I or the water passing pipe II and two mounting plates fixed between the two fixing plates, and a plurality of nozzles are arranged between the two mounting plates at intervals along the length direction of the two mounting plates.
5. The heavy H-shaped steel control cooling system according to claim 1, wherein a ranging sensor I for detecting the distance between two opposite side water spraying assemblies is arranged on the side water spraying assembly on one side of the conveying roller way, a ranging sensor II for detecting the distance between the upper water spraying assembly and the conveying roller surface of the conveying roller way is arranged on the upper water spraying assembly, and the ranging sensor I and the ranging sensor II are connected with the horizontal telescopic driving component and the lifting driving component through a PLC (programmable logic controller), and an upper computer is connected with the PLC in a communication mode to input instructions to the PLC.
6. The cooling control method for the heavy H-shaped steel, which is characterized by comprising the following steps of: Step 1, adjusting positions of a side water spraying assembly and an upper water spraying assembly according to specifications of H-shaped steel, selecting corresponding numbers and positions of nozzles on the side water spraying assembly, the upper water spraying assembly and the lower water spraying assembly to work, and adjusting angles and spraying pressure of the nozzles; step 2, starting a side water spraying assembly, an upper water spraying assembly and a lower water spraying assembly, and water-cooling H-shaped steel in the conveying process of the conveying roller way; and 3, detecting the inner and outer temperature differences and the upper and lower temperature differences of the section at one or more positions of the H-shaped steel, judging the uniformity of the section temperature of the H-shaped steel, and if the uniformity of the section temperature of the H-shaped steel does not meet the requirement, checking the related parameters set in the step 1 and adjusting in real time.
7. The method of cooling control of heavy H-section steel according to claim 6, wherein the parameters related to step 1 include specification parameters of H-section steel and parameters of each group of water spray assemblies; The specification parameters of the H-shaped steel comprise web height H, flange width B, web thickness t 1 and flange thickness t 2 , wherein the parameters of each group of water spraying components comprise a distance H 0 between two side water spraying components, a maximum height B 0 between an upper water spraying component and a conveying roller way, a minimum height B 1 between the upper water spraying component and the conveying roller way, a jet angle difference value theta between two adjacent nozzles in a group of nozzle components, pressure P 1 of the nozzles in the upper water spraying component, pressure P 2 of the nozzles in the lower water spraying component and pressure P 3 of the nozzles in the side water spraying components, total transverse length H 1 of the nozzles selected in the upper water spraying component and arranged along the web height direction of the H-shaped steel, total transverse length H 2 of the nozzles selected in the upper water spraying component and total vertical length B 1 of the nozzles selected in the side water spraying component and arranged along the width direction of the H-shaped steel, and the specification range of the H-shaped steel is t2 is more than or equal to 30mm or more than 200kg per meter; the position adjustment requirements of the side water spraying component and the upper water spraying component are met that H 0 -H≤400mm、0.5B<B 1 <1.5B<B 0 <2.5B is more than or equal to 100 mm; The selection of the upper nozzles of the side water spraying assembly, the upper water spraying assembly and the lower water spraying assembly is required to meet the requirements that 1) the nozzles cover the periphery of the section of the H-shaped steel, H 1 >H、h 2 is more than H and b 1 >B;2）-30°≤θ≤30°;3）1.5MPa≤P 1 ≤0.006*H+0.05*t 2 、1.5MPa≤P 2 ≤0.004*H+0.02*t 2 , and P 3 ≤0.005*B+0.05*t 2 is less than or equal to 1.5 MPa.
8. The method for cooling and controlling thick H-shaped steel according to claim 6, wherein in the step 3, the temperature measuring points for the uniformity of the section temperature of the H-shaped steel comprise four groups of temperature measuring points which are oppositely arranged at the inner side and the outer side of the 1/4 part of the width of the flange, and when the temperature difference between the temperature measuring points at the inner side and the outer side of the same position is not more than 15 ℃ and the temperature difference between the temperature measuring points at the upper side and the lower side of the same position is not more than 20 ℃, the uniformity of the section temperature of the H-shaped steel meets the requirement.

Description

Heavy H-shaped steel control cooling system and cooling control method Technical Field The invention relates to the technical field of H-shaped steel cooling control, in particular to a thick H-shaped steel cooling control system and a cooling control method. Background The H-shaped steel is widely applied to the fields of building, energy, marine engineering, bridge structures and the like due to the characteristics of good bending resistance, simple section, low cost and the like. Along with the application requirements of H-shaped steel, heavy H-shaped steel with thicker flange thickness and heavier single meter weight (the flange thickness is not less than 30mm, and the weight of the H-shaped steel is more than 200Kg per meter) is increasingly demanded in the fields of construction, structure and the like. Because the flange of the product is thicker, the mechanical property of the product can not be effectively ensured under the conditions of blank pressing and limited rolling equipment, and therefore, the prior production enterprises mainly adopt a controlled cooling process after rolling to produce thick H-shaped steel. However, due to the section specificity of the H-shaped steel, the problems of single nozzle arrangement, fixed injection angle, unreasonable nozzle section direction arrangement and the like of the traditional cooling device cannot be effectively solved, and the problem that the thick H-shaped steel is uneven in section distribution of rolled pieces after a cooling process, and the temperature difference of the upper flange, the lower flange, the R angle, the web plate and other parts is large can not be effectively solved. In particular to H-shaped steel with ultra-thick flange thickness, the cooling degree of different positions of the flange is different, and the tensile strength distributed in the whole flange width position is uneven. In addition, as the cooling control equipment cannot effectively match the performance and the appearance of the product, the mechanical properties of some products after the cooling process meet the requirements, but the appearance of the products is seriously deformed due to lateral bending and warping, secondary back straightening is needed, equipment and process investment is increased, and the products with limited straightening equipment capacity cannot be straightened to become waste products. The patent with publication number CN101767113B discloses a control cooling device after hot rolling H-shaped steel rolling, which comprises an upper nozzle, a lower nozzle, a left nozzle and a right nozzle, wherein the upper nozzle and the lower nozzle are arranged on an upper spray pipe and a lower spray pipe, the left nozzle and the right nozzle are arranged on a left spray pipe and a right spray pipe, the upper nozzle and the lower nozzle are respectively aligned with an upper R part and a lower R part of the hot rolling H-shaped steel, the left nozzle and the right nozzle are respectively aligned with the centers of left side edges and right side edges of the hot rolling H-shaped steel, and the control cooling device is characterized in that the nozzles are arranged in a manner of inclining a certain angle away from the rolling direction of the hot rolling H-shaped steel, so that the water flow direction sprayed by the nozzles is perpendicular to the surface of the hot rolling H-shaped steel. The spray nozzle is arranged at a certain angle away from the rolling direction of the hot rolled H-shaped steel, so that the final direction of the water flow synthesized by the spray direction of the spray nozzle and the moving direction of the H-shaped steel is perpendicular to the surface of the H-shaped steel, the cooling effect is improved, and the cooling rate is 75-150 ℃ per second. The water nozzles are fewer in number in the up-down and side directions, the water flow spraying area is limited, and particularly for some ultra-wide flange H-shaped steel, the water flow on one side cannot cover the whole flange width, and the deformation of rolled pieces is easily caused by the uneven temperature of the outer section of the whole H-shaped steel. The patent with the publication number of CN102069097B discloses a cooling system and a cooling process after hot rolling H-shaped steel rolling, wherein the cooling system comprises a control system, a cooling module, a water tank, a water inlet pipeline and a water outlet pipeline, one side of the water inlet pipeline is connected with a water supply system, the other side of the water inlet pipeline is connected with the water tank, one side of the water outlet pipeline is connected with the water tank, and the other side of the water outlet pipeline is connected with the cooling module. The cooling process comprises the steps that hot rolled H-shaped steel enters a cooling system after rolling, cooling nozzles arranged on the upper side and the lower side are aligned with the upper R part and the lower R pa