A heavy H-shaped steel controlled cooling system and a cooling control method

Abstract

A kind of heavy H-shaped steel controlled cooling system and cooling control method, belong to H-shaped steel control cold technical field, the heavy H-shaped steel controlled cooling system, including conveying roller way and along its length direction interval and with the shape around H-shaped steel section outer periphery multiple groups of water spraying components, the water spraying component includes the side water spraying component of conveying roller way two sides respectively horizontal sliding installation, upper water spraying component and lower water spraying component of conveying roller way upper and lower lifting installation, the beneficial effect of the present application is, the reliable cooling of the outer surface of different specifications H-shaped steel product can be realized in the present application, the uniformity of entire H-shaped steel outer section cooling can be guaranteed, the stability of H-shaped steel product performance is improved, it is applicable to production factory and is widely used.

Description

Technical Field

[0001] This invention relates to the field of H-beam cooling technology, and in particular to a controlled cooling system and cooling control method for heavy H-beams. Background Technology

[0002] H-beams are widely used in construction, energy, marine engineering, and bridge structures due to their good bending resistance, simple cross-section, and low cost. With increasing demands for H-beam applications, there is a growing need for heavy-duty H-beams with thicker flanges and higher weight per meter (flange thickness not less than 30mm, weight per meter greater than 200kg). Because of the thicker flanges, the mechanical properties of the product cannot be effectively guaranteed under limited conditions of billet reduction and rolling equipment. Therefore, manufacturers currently mainly use controlled cooling after rolling to produce heavy-duty H-beams.

[0003] However, due to the unique cross-section of H-beams, traditional cooling devices suffer from problems such as a single nozzle arrangement, fixed spray angle, and unreasonable nozzle cross-sectional orientation. These issues fail to effectively address the uniformity of cooling across the H-beam cross-section, resulting in uneven cross-sectional distribution in heavy H-beams after the cooling process, with significant temperature differences at the upper and lower flanges, radius (R-angle), and web. This is particularly problematic for ultra-thick flange H-beams, where varying degrees of cooling across different flange locations lead to uneven tensile strength distribution across the entire flange width. Furthermore, because controlled cooling equipment cannot effectively match product performance and shape, some products, while meeting mechanical performance requirements after cooling, exhibit severe deformation such as lateral bending and warping, necessitating secondary straightening. This not only increases equipment and process investment but also renders some products with limited straightening equipment unusable for straightening, rendering them scrap.

[0004] Patent CN101767113B discloses a post-rolling controlled cooling device for hot-rolled H-beams, comprising upper and lower nozzles installed on upper and lower spray pipes and left and right nozzles installed on left and right side spray pipes. The upper and lower nozzles are respectively aligned with the upper and lower R-sections of the hot-rolled H-beam, and the left and right nozzles are respectively aligned with the centers of the left and right side flanges of the hot-rolled H-beam. The key feature is that the nozzles are installed at a certain angle away from the rolling direction of the hot-rolled H-beam, so that the direction of the water flow sprayed by the nozzles is perpendicular to the surface of the hot-rolled H-beam. This angled installation ensures that the final direction of the water flow, resulting from the combination of the nozzle spray direction and the H-beam's movement direction, is perpendicular to the H-beam surface, improving the cooling effect. The cooling rate is 75-150℃ / s. However, this method has a limited number of nozzles in the upper, lower, and side directions, resulting in a limited water spray area. Especially for some H-beams with ultra-wide flanges, the water flow on one side cannot cover the entire flange width, leading to uneven temperature distribution across the entire H-beam cross-section and potentially causing deformation of the rolled piece.

[0005] Patent CN102069097B discloses a post-rolling cooling system and process for hot-rolled H-beams. The cooling system includes a control system, a cooling module, a water tank, an inlet pipe, and an outlet pipe. One side of the inlet pipe is connected to a water supply system, and the other side is connected to the water tank. One side of the outlet pipe is connected to the water tank, and the other side is connected to the cooling module. The cooling process involves the hot-rolled H-beam entering the post-rolling cooling system. Cooling nozzles located on the upper and lower sides are aimed at the upper and lower radius (R-section) of the hot-rolled H-beam, and cooling nozzles located on the horizontal sides are aimed at the centers of the horizontal flanges of the hot-rolled H-beam for water spray cooling. The cooling water pressure is controlled at 8–10 MPa, and the cooling water flow rate is 400–600 m³ / h. 3 / hour; the continuous cooling time for each section of the controlled steel is 10-15 seconds; the cooling rate is controlled at 30℃-50℃ / second. This invention employs a low-investment cooling system, which is particularly suitable for improving the post-rolling strength of small-sized hot-rolled H-beams (400mm×200mm and below). However, the water nozzle angle of this device is limited, making it suitable for small-sized H-beams. For thick H-beams, the water nozzle cannot achieve full cross-section coverage.

[0006] Patent CN102755999B discloses an inter-stand cooling device for hot-rolled H-beams, comprising: multiple cooling sections symmetrically arranged on both sides of the inter-stand space of a finishing mill, each cooling section equipped with multiple water spray nozzles; the multiple cooling sections being connected to a main water pipe via flexible hoses; a solenoid valve correspondingly located on the main water pipe for controlling the water pressure and flow rate supplied to the multiple cooling sections; and a flow control unit for controlling the opening of the solenoid valves based on the temperature of the H-beam. This device is mainly suitable for cooling the rolled pieces between stands, and primarily cools the outer flange of the H-beam, failing to cool the outer cross-section of the H-beam.

[0007] Patent CN103357678B discloses a cooling device for cast and rolled H-beams, comprising: a shell, which is box-shaped; three sets of upper nozzles located in the shell, used to vertically align with the two R-sections and the center of the web on the upper side of the H-beam; an upper spray pipe located in the shell and connected to the three sets of upper nozzles; three sets of lower nozzles; a lower spray pipe located in the shell and connected to the three sets of lower nozzles; three sets of left nozzles located in the shell, arranged vertically, used to vertically align with the left side of the H-beam so that cooling water is evenly sprayed onto the left side of the H-beam; a left spray pipe located in the shell and connected to the three sets of left nozzles; three sets of right nozzles; a right spray pipe located in the shell and connected to the three sets of right nozzles; and cooling water sprayed from each set of nozzles does not interfere with each other. Although the device can cool the H-beam section, it only has one type of water nozzle. The three sets of water nozzles cannot cover H-beams with a large flange width. Moreover, the upper nozzle is arranged in the same direction as the running direction of the rolled piece, which not only increases the length of the device, but also makes it easy for slightly bent rolled pieces to collide with the cooling device when passing through it.

[0008] Patent CN107838203B discloses a water-cooling device for H-beams, belonging to the field of hot-rolled steel cooling. It includes a cooling bed workshop and a cooling bed. The cooling bed workshop has an inlet pit and an outlet pit at the inlet and outlet of the cooling bed, respectively. A ventilator is installed on the top of the cooling bed workshop. A powerful cooling fan is installed below the cooling bed. Both the inlet and outlet pits extend outside the cooling bed workshop and are connected by a pit below the cooling bed. The length and depth of the inlet pit are smaller than those of the outlet pit. The pits are stepped, with the lower step level with the outlet pit and the upper step level with the inlet pit. This device mainly uses air cooling equipment to cool the H-beam rolled pieces, and because it is primarily located on the cooling bed, it cannot control the microstructure and properties of the rolled pieces during the rolling process.

[0009] Patent CN111451305B discloses a cooling device for hot-rolled H-beams, including a placement rack for alternately tilting H-beams to the left and right. An upper water spray device is installed above the placement rack to spray water for cooling the outer sides of the two flanges and the area above the internal web of the H-beam. A lower water spray device is installed below the placement rack to spray water for cooling the area below the internal web of the H-beam. This device requires the H-beam to maintain a certain tilt angle during operation. This condition cannot be guaranteed for H-beams that run straight during actual rolling. Furthermore, the nozzles of this device are positioned too close to the actual rolled piece, which could easily cause damage due to impact.

[0010] Patent CN213256300U discloses a cooling device for H-beam rolling mills, including a housing. A second motor is fixedly installed on the left side of the housing. A threaded rod is movably installed between the two sides inside the housing. The output end of the second motor is fixedly connected to one end of the threaded rod. A sliding rod is fixedly installed between the two sides inside the housing. A slider is threaded onto the threaded rod and movably connected to the sliding rod. A second water tank is fixedly installed on the top of the slider. A connecting block is fixedly installed on the bottom of the slider. A water pipe is fixedly installed on the bottom of the connecting block. Three water guns are evenly fixedly installed on the bottom of the water pipe. A conduit is fixedly installed on the right side of the top of the water pipe. An L-shaped connecting pipe is fixedly installed between the conduit and the second water tank. This invention, through a series of structural features, enables the device to achieve more uniform cooling and wastewater recycling. The device, with only three water guns on one side, cannot achieve uniform cooling of the outer flange of the H-beam with ultra-wide flanges. At the same time, the movable water guns arranged above the device cannot cool the entire web when cooling ultra-high specification H-beams, and are prone to causing excessive cooling on one side, which can cause deformation such as lateral bending of the rolled piece.

[0011] As can be seen from the existing technologies above, there is currently no full-section cooling device in the H-beam production field that can meet the needs of some ultra-large, ultra-wide, and ultra-thick H-beams. Therefore, there is an urgent need to find a device and method that can meet the needs of industrial production of thick H-beams, especially one that can cool the entire outer section of the H-beam. Summary of the Invention

[0012] To address the aforementioned technical problems, this invention provides a controlled cooling system and cooling control method for heavy H-beams, which can meet the process requirements for uniform cooling of the outer cross-section of heavy H-beams.

[0013] To achieve the above objectives, the technical solution adopted by the present invention to solve its technical problem is as follows: the heavy H-beam controlled cooling system includes a conveyor roller and multiple sets of water spraying components that are spaced apart along its length and follow the shape of the outer periphery of the H-beam cross section. The water spraying components include side water spraying components that are horizontally slidably installed on both sides of the conveyor roller, an upper water spraying component that is vertically lifted and lowered above the conveyor roller, and a lower water spraying component installed inside the conveyor roller.

[0014] The side spray water assembly includes a side spray water tank that is slidably mounted on the frame of the conveyor rollers along the width direction of the conveyor rollers. Multiple sets of side nozzle assemblies are mounted on the side spray water tank, and the outer side of the side spray water tank is connected to a horizontal telescopic drive component.

[0015] The outer side of the side spray tank is connected to the water supply equipment via a water supply pipeline, and the inner side of the side spray tank is connected to multiple sets of side nozzle assemblies via a water pump I. The multiple sets of side nozzle assemblies are arranged at intervals along the height direction of the inner side of the side spray tank.

[0016] The upper water spray assembly includes a water pipe I recessed along the center line of the conveyor roller. The upper side of the water pipe I is connected to a support frame fixed on the machine frame via a lifting drive component. Multiple sets of upper nozzle assemblies are installed on the lower side of the water pipe I.

[0017] The end of the water pipe I is connected to the water supply equipment via a water supply pipeline. The lower side of the water pipe I is connected to multiple sets of upper nozzle assemblies via a water pump II. The multiple sets of upper nozzle assemblies are arranged at intervals along the lower side of the water pipe I.

[0018] The lower spray water assembly includes a water pipe II protruding along the center line of the conveying roller conveyor. The end of the water pipe II is connected to a water supply device through a water supply pipeline. The upper side of the water pipe II is connected to multiple sets of lower nozzle assemblies through a water pump III. The multiple sets of lower nozzle assemblies are arranged at intervals along the upper side of the water pipe II, and the highest point of the multiple sets of lower nozzle assemblies is not higher than the conveying roller surface of the conveying roller conveyor.

[0019] The side nozzle assembly, upper nozzle assembly, and lower nozzle assembly have the same structure, each including a mounting bracket fixed on the side spray tank, water pipe I, or water pipe II. Multiple nozzles are rotatably connected to the mounting bracket, and one end of each nozzle is connected by an angle adjustment mechanism.

[0020] One end of each of the multiple nozzles is connected to a water outlet branch pipe via a flexible hose, and a water pressure regulating valve is installed inside the water outlet branch pipe; the multiple water outlet branch pipes converge and are connected to the side spray water tank, water pipe I or water pipe II via a main water inlet pipe, and a water pump I, water pump II or water pump III is installed inside the main water inlet pipe.

[0021] The mounting bracket includes two fixing plates fixed to the side spray tank, water pipe I or water pipe II, and two mounting plates fixed between them, with a plurality of nozzles installed at intervals along the length of the two mounting plates.

[0022] The angle adjustment mechanism includes a hinge frame connected between two adjacent nozzles. The nozzle near one end of the mounting frame is connected to the mounting frame via an adjusting screw, and the nozzle near the other end of the mounting frame is hinged to the mounting frame.

[0023] A distance measuring sensor I is installed on the side spray water assembly on one side of the conveyor roller conveyor to detect the distance between two opposing side spray water assemblies. A distance measuring sensor II is installed on the upper spray water assembly to detect the distance between it and the conveyor roller surface of the conveyor roller conveyor. The distance measuring sensor I and the distance measuring sensor II are connected to the horizontal telescopic drive component and the lifting drive component through a PLC. The host computer is connected to the PLC to communicate and input instructions to the PLC.

[0024] A method for controlling the cooling of heavy H-beams, utilizing the aforementioned heavy H-beam cooling control system, includes the following steps:

[0025] Step 1: Adjust the positions of the side spray assembly and the top spray assembly according to the specifications of the H-beam. Select the corresponding number and position of nozzles on the side spray assembly, the top spray assembly and the bottom spray assembly to work, and adjust the nozzle angle and spray pressure.

[0026] Step 2: Turn on the side spray assembly, upper spray assembly and lower spray assembly, and the H-beam is water-cooled during the conveyor roller conveyor process;

[0027] Step 3: Detect the internal and external temperature difference and the vertical temperature difference at one or more locations on the H-beam cross section to determine the temperature uniformity of the H-beam cross section; if the temperature uniformity of the H-beam cross section does not meet the requirements, check the relevant parameters set in Step 1 and make real-time adjustments.

[0028] The relevant parameters in step 1 include the specifications of the H-beams and the parameters of each water spray assembly.

[0029] The specifications of the H-beam include: web height H, flange width B, web thickness t1, and flange thickness t2; the parameters of each water spray assembly include: the distance H0 between the two side water spray assemblies, the maximum height B0 between the upper water spray assembly and the conveyor roller, the minimum height B1 between the upper water spray assembly and the conveyor roller, the difference in spray angle θ between two adjacent nozzles in a set of nozzle assemblies, the pressure P1 of the nozzles in the upper water spray assembly, the pressure P2 of the nozzles in the lower water spray assembly, and the pressure P3 of the nozzles in the side water spray assembly, the total transverse length h1 of the selected nozzles in the upper water spray assembly along the web height direction of the H-beam, the total transverse length h2 of the selected nozzles in the upper water spray assembly along the web height direction of the H-beam, and the total vertical length b1 of the selected nozzles in the side water spray assembly along the flange width direction of the H-beam; wherein, the specification range of the H-beam is t2≥30mm or the weight per meter is greater than 200kg;

[0030] The position adjustment of the side spray assembly and the top spray assembly needs to meet the following requirements: 100mm ≤ H0 - H ≤ 400mm, 0.5B <B1<1.5B<B0<2.5B;

[0031] The selection of nozzles for the side spray assembly, upper spray assembly, and lower spray assembly must meet the following requirements: 1) The nozzles must cover the outer perimeter of the H-beam section: h1>H, h2>H, and b1>B; 2) -30°≤θ≤30°; 3) 1.5MPa≤P1≤0.006*H+0.05*t2, 1.5MPa≤P2≤0.004*H+0.02*t2, and 1.5MPa≤P3≤0.005*B+0.05*t2.

[0032] In step 3, the temperature measurement points selected for the H-beam cross-section temperature uniformity include four sets of temperature measurement points arranged opposite each other on the inner and outer sides at 1 / 4 of the flange width; when the temperature difference between the inner and outer temperature measurement points at the same position is no greater than 15℃, and the temperature difference between the upper and lower temperature measurement points on the same side is no greater than 20℃, the temperature uniformity of the H-beam cross-section meets the requirements.

[0033] The beneficial effects of this invention are:

[0034] This invention provides a controlled cooling system and method for heavy-duty H-beams, primarily applicable to the cooling of H-beams with flange thicknesses of 30mm or more or a weight per meter greater than 200KG. The controlled cooling system features a water spray assembly positioned close to the outer cross-section of the H-beam. The position of the water spray assembly can be adjusted according to different H-beam specifications, allowing the nozzles on the assembly to conform to the shape of the H-beam's outer cross-section, completely covering it. A predetermined distance is maintained between the nozzles and the H-beam's outer cross-section. Furthermore, the number of nozzles, appropriate spray angle, and spray pressure can be adjusted according to different H-beam specifications, thereby achieving reliable cooling of the outer surface of H-beams of different specifications. This ensures uniform cooling of the entire H-beam's outer cross-section, improves the stability of H-beam product performance, and is suitable for widespread use in production plants. Attached Figure Description

[0035] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0036] Figure 1 This is a diagram illustrating the spray effect of the heavy H-beam controlled cooling system of the present invention.

[0037] Figure 2 This is a schematic diagram of the structure of the heavy H-beam controlled cooling system of the present invention;

[0038] Figure 3 This is a schematic diagram of the side spray water assembly in this invention;

[0039] Figure 4 for Figure 3 The left view;

[0040] Figure 5 for Figure 3 Schematic diagram of the water supply pipeline for the central nozzle;

[0041] Figure 6 This is a schematic diagram of the nozzle arrangement in the water spray assembly of the present invention;

[0042] Figure 7 This is a cross-sectional dimension diagram of the heavy H-beam controlled cooling system of the present invention;

[0043] Figure 8 A schematic diagram showing the external dimensions and temperature measurement points of an H-beam.

[0044] Figure 9 This is a structural schematic diagram showing the total horizontal and vertical lengths of the nozzle arrangement in the water spray assembly of the present invention;

[0045] The markings in the above figures are as follows: 1. Conveyor roller, 2. Side spray assembly, 21. Side spray tank, 22. Side nozzle assembly, 221. Fixing plate, 222. Mounting plate, 223. Nozzle, 224. Hose, 225. Outlet branch pipe, 226. Water pressure regulating valve, 227. Main inlet pipe, 228. Hinge frame, 229. Adjusting screw, 23. Horizontal telescopic drive component, 3. Upper spray assembly, 31. Water pipe I, 32. Lifting drive component, 33. Support frame, 34. Upper nozzle assembly, 4. Lower spray assembly, 41. Water pipe II, 42. Lower nozzle assembly. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] In existing technologies, for cooling H-beams with flange thicknesses of 30mm or more or a weight exceeding 200kg, traditional cooling devices suffer from problems such as simple nozzle arrangement, fixed spray angles, and unreasonable nozzle cross-sectional orientation. These issues fail to effectively address the uniformity of H-beam cross-section cooling, resulting in uneven cross-sectional distribution after cooling, significant temperature differences between the upper and lower flanges, radius (R-angle), and web, and uneven tensile strength distribution across the entire flange width. Furthermore, existing controlled cooling equipment for H-beams cannot effectively match product performance and shape, leading to severe deformations such as lateral bending and warping, requiring secondary straightening. This not only increases equipment and process investment but also renders some products with limited straightening equipment unusable for straightening, resulting in scrap.

[0050] Therefore, based on the above-mentioned technical problems existing in the prior art, the present invention provides a controlled cooling system and cooling control method for heavy H-beams. For example... Figures 1-9 As shown, the controlled cooling system for heavy-duty H-beams includes a conveyor roller 1 and multiple sets of water spray assemblies spaced along its length and conforming to the shape of the H-beam cross-section. Each set of water spray assemblies includes side water spray assemblies 2 horizontally sliding on both sides of the conveyor roller 1, an upper water spray assembly 3 vertically lifting above the conveyor roller 1, and a lower water spray assembly 4 installed inside the conveyor roller 1. The spacing between the two side water spray assemblies 2 and the position of the upper water spray assembly 3 in each set of water spray assemblies are adjusted according to different specifications of H-beams, so that the nozzles 223 on the water spray assemblies are arranged conformally to the outer cross-section of the H-beam. The nozzles 223 are spaced apart from the outer cross-section of the H-beam by one end, completely covering the outer cross-section of the H-beam. This achieves reliable cooling of the outer surface of H-beams of different specifications, improves the uniformity of cooling of the entire outer cross-section of the H-beam, and enhances the stability of the H-beam product's performance.

[0051] Specifically, the side spray water assembly 2 includes a side spray water tank 21 that is slidably mounted on the frame of the conveyor roller 1 along the width direction of the conveyor roller 1. Multiple sets of side nozzle assemblies 22 are installed on the side spray water tank 21. The outer side of the side spray water tank 21 is connected to a horizontal telescopic drive component 23. The horizontal telescopic drive component 23 can be configured as a hydraulic cylinder, a pneumatic cylinder, etc. The horizontal telescopic drive component 23 can drive the side spray water tank 21 to move along the width direction of the conveyor roller 1, thereby adjusting the spacing between the two side spray water assemblies 2 in each set of spray water assemblies to accommodate H-beams of different specifications.

[0052] The side spray tank 21 is connected to the water supply equipment via a water supply pipeline on its outer side, and the side spray tank 21 is connected to multiple sets of side nozzle assemblies 22 via a water pump I. Water is supplied to the multiple sets of side nozzle assemblies 22 by the water pump I. The multiple sets of side nozzle assemblies 22 are arranged at intervals along the height direction of the inner side of the side spray tank 21 to cover the flange width of the H-beam.

[0053] The side nozzle assembly 22 includes a mounting bracket fixed to the side spray tank 21. Multiple nozzles 223 are rotatably connected to the mounting bracket. Two to four nozzles 223 can be installed, and one end of each nozzle 223 is connected via an angle adjustment mechanism. One end of each nozzle 223 is connected to a water outlet branch pipe 225 via a flexible hose 224. A water pressure regulating valve 226 is installed inside the water outlet branch pipe 225 to adjust the spray pressure of the nozzles 223, which can be adjusted according to the specifications of the H-beam. The multiple water outlet branch pipes 225 of the multiple side nozzle assemblies 22 converge and are connected to the side spray tank 21 via a main water inlet pipe 227. A water pump I is installed inside the main water inlet pipe 227. The water pump I transports water from the side spray tank 21 through the main water inlet pipe 227 to each water outlet branch pipe 225, and then through each water outlet branch pipe 225 to the corresponding nozzles 223 in the side nozzle assembly 22, to cool the outer flange of the H-beam.

[0054] The mounting frame includes two fixed plates 221 fixed to the side spray tank 21 and two perpendicular mounting plates 222 fixed between them. Multiple nozzles 223 are installed at intervals along the length of the two mounting plates 222. Each nozzle 223 is rotatably connected to the two mounting plates 222 via a rotating shaft. The angle adjustment mechanism includes a hinge frame 228 connected between two adjacent nozzles 223. The nozzle 223 near one end of the mounting frame is threadedly connected to the mounting frame via an adjusting screw 229. One end of the adjusting screw 229 is rotatably connected to the nozzle 223, and the nozzle 223 near the other end of the mounting frame is hinged to the mounting frame. A compression spring is also sleeved on the adjusting screw 229, with both ends of the spring contacting one end of the mounting frame and one side of the nozzle 223, respectively, ensuring the stability of the nozzle 223 after angle adjustment. Turning the adjusting screw 229 adjusts the length of its extension from the mounting bracket. Under the action of the hinge bracket 228 and the rotating shaft, multiple nozzles 223 are linked together to adjust the spray angle of the nozzles 223, so as to ensure that the spray area of ​​the nozzles 223 can cover the flange width of the H-beam.

[0055] Specifically, the upper water spray assembly 3 includes a water pipe I 31 recessed along the center line of the conveyor roller 1. The shape of the water pipe I 31 is adapted to the cross-sectional shape of the H-beam, improving the uniformity of cooling of the upper part of the H-beam. The upper side of the water pipe I 31 is connected to the support frame 33 fixed on the machine frame via a lifting drive component 32. The lifting drive component 32 can be configured as a cylinder, hydraulic cylinder, etc., and one or more can be installed. Multiple sets of upper nozzle assemblies 34 are installed on the lower side of the water pipe I 31. The operation of the lifting drive component 32 can drive the entire water pipe I 31 to move up and down to adjust the distance between the multiple sets of upper nozzle assemblies 34 and the H-beam, so as to accommodate H-beams of different specifications.

[0056] The end of the water pipe I 31 is connected to the water supply equipment via a water supply pipeline. The lower side of the water pipe I 31 is connected to multiple sets of upper nozzle assemblies 34 via a water pump II. The multiple sets of upper nozzle assemblies 34 are arranged at intervals along the lower side of the water pipe I 31, and in accordance with the shape of the water pipe I 31, they can reliably cool the high-temperature areas such as the rounded corners and the middle of the flanges of the H-beam, further improving the uniformity of cooling of the H-beam. The upper nozzle assembly 34 has the same structure as the side nozzle assembly 22, including a mounting bracket that is mounted on the lower side of the water pipe I 31. Multiple nozzles 223 are rotatably connected to the mounting bracket. One end of the multiple nozzles 223 is connected by an angle adjustment mechanism, which can adjust the spray angle of the nozzles 223 to ensure that the spray area of ​​the selected nozzles 223 can cover the upper side of the web and the inner side of the lower flange of the H-beam, thereby improving the cooling effect. One end of each of the multiple nozzles 223 is connected to a water outlet branch pipe 225 via a flexible hose 224. A water pressure regulating valve 226 is installed inside the water outlet branch pipe 225 to adjust the spray pressure of the nozzles 223. The spray pressure of the nozzles 223 can be adjusted according to the specifications of the H-beam. The multiple water outlet branch pipes 225 of the multiple sets of side nozzle assemblies 22 converge and are connected to the water supply pipe I 31 via a main water inlet pipe 227. A water pump II is installed inside the main water inlet pipe 227. The water pump II transports the water in the water supply pipe I 31 to each water outlet branch pipe 225 through the main water inlet pipe 227, and then to the multiple nozzles 223 in the corresponding upper nozzle assembly 34 to cool the inner side of the upper flange and the upper side of the web of the H-beam.

[0057] Specifically, the lower water spray assembly 4 includes a water pipe II 41 protruding along the center line of the conveyor roller 1. The shape of the water pipe II 41 is adapted to the cross-sectional shape of the H-beam, improving the uniformity of cooling the lower part of the H-beam. The end of the water pipe II 41 is connected to the water supply equipment through a water supply pipeline. The upper side of the water pipe II 41 is connected to multiple sets of lower nozzle assemblies 42 through a water pump III. The multiple sets of lower nozzle assemblies 42 are arranged at intervals along the upper side of the water pipe II 41, and the highest point of the multiple sets of lower nozzle assemblies 42 is not higher than the conveyor roller surface of the conveyor roller 1, ensuring that the H-beam is water-cooled while being conveyed by the conveyor roller 1.

[0058] The lower nozzle assembly 42 has the same structure as the side nozzle assembly 22 and the upper nozzle assembly 34. All include a mounting bracket that conforms to the upper side of the water pipe II 41. Multiple nozzles 223 are rotatably connected to the mounting bracket. One end of each nozzle 223 is connected via an angle adjustment mechanism, allowing adjustment of the nozzle's spray angle to ensure that the selected nozzle's spray area covers the lower side of the web and the inner side of the lower flange of the H-beam, thereby improving cooling efficiency. One end of each nozzle 223 is connected to a water outlet branch pipe 225 via a flexible hose 224. A water pressure regulating valve 226 is installed in the water outlet branch pipe 225 to adjust the spray pressure of the nozzles 223, which can be adjusted according to the specifications of the H-beam. The multiple water outlet branch pipes 225 of the multiple side nozzle assemblies 22 converge and are connected to the water pipe II 41 via a main water inlet pipe 227. A water pump III is installed in the main water inlet pipe 227. Water pump III delivers water from water pipe II 41 through main inlet pipe 227 to each outlet branch pipe 225, and then through each outlet branch pipe 225 to multiple nozzles 223 in the corresponding lower nozzle assembly 42 to cool the inner side of the lower flange and the lower side of the web of the H-beam.

[0059] Specifically, a distance sensor I is installed on the side spray assembly 2 on one side of the conveyor roller 1 to detect the distance between two opposing side spray assemblies 2, and a distance sensor II is installed on the upper spray assembly 3 to detect the distance between it and the conveyor roller surface of the conveyor roller 1. The distance sensors I and II are connected to the horizontal telescopic drive component 23 and the lifting drive component 32 via a PLC. The host computer communicates with the PLC to input instructions. The specifications of the H-beam to be cooled are input into the host computer. Based on the pre-input relationship between the specifications of the H-beam and the relative positions of the side spray assembly 2, upper spray assembly 3, and lower spray assembly 4 in the spray assembly, the PLC controls the corresponding horizontal telescopic drive component 23 and lifting drive component 32 to operate, so that the distance between two opposing side spray assemblies 2 and the height of the upper spray assembly 3 in each spray assembly meet the process requirements, thereby ensuring the cooling effect of the H-beam.

[0060] In addition, the upper spray water assembly 3, the lower spray water assembly 4 and the upper nozzle assembly 34 of the side spray water assembly 2 are numbered as shown in the figure, including multiple sets of side nozzle assemblies 22 (P11~P14 and P21~P24), multiple sets of upper nozzle assemblies 34 (P31~P37) and multiple sets of lower nozzle assemblies 42 (P41~P45).

[0061] The method for controlling the cooling of heavy H-beams using the aforementioned controlled cooling system includes the following steps:

[0062] Step 1: Adjust the positions of the side water spraying assemblies 2 and the upper water spraying assembly 3 according to the specifications of the H-shaped steel. Select the nozzles 223 with corresponding quantities and positions on the side water spraying assemblies 2, the upper water spraying assembly 3, and the lower water spraying assembly 4 to work, and adjust the angles and spraying pressures of the nozzles 223.

[0063] The relevant parameters include the specification parameters of the H-shaped steel and the parameters of each group of water spraying assemblies. The specification parameters of the H-shaped steel include: web height H, flange width B, web thickness t1, and flange thickness t2. The parameters of each group of water spraying assemblies include: the spacing H0 between the two side water spraying assemblies 2, the maximum height B0 between the upper water spraying assembly 3 and the conveying roller table 1, the minimum height B1 between the upper water spraying assembly 3 and the conveying roller table 1, the spraying angle difference θ between two adjacent nozzles 223 in a group of nozzle 223 assemblies, the pressure P1 of the nozzles 223 in the upper water spraying assembly 3, the pressure P2 of the nozzles 223 in the lower water spraying assembly 4, and the pressure P3 of the nozzles 223 in the side water spraying assemblies 2, the total transverse length h1 of the selected nozzles 223 in the upper water spraying assembly 3 arranged along the web height direction of the H-shaped steel, the total transverse length h2 of the selected nozzles 223 in the upper water spraying assembly 3 arranged along the web height direction of the H-shaped steel, and the total vertical length b1 of the selected nozzles 223 in the side water spraying assemblies 2 arranged along the flange width direction of the H-shaped steel; where, t2 ≥ 30 mm or the weight per meter of the H-shaped steel is greater than 200 Kg.

[0064] The conditions that the above parameters need to meet are as follows:

[0065] 1) The position adjustment of the side water spraying assemblies 2 and the upper water spraying assembly 3 needs to meet: 100 mm ≤ H0 - H ≤ 400 mm, 0.5B < B1 < 1.5B < B0 < 2.5B; and among them, when the structure of the water pipe Ⅰ 31 is determined, B0 - B1 is the distance of the downward depression in the middle of the water pipe Ⅰ 31, which is a determined value, and it is ensured that the side water spraying assemblies 2 and the upper water spraying assembly 3 do not contact the H-shaped steel during use.

[0066] 2) The selection of the nozzles on the side water spraying assemblies 2, the upper water spraying assembly 3, and the lower water spraying assembly 4 needs to meet: ① The nozzles 223 cover the outer periphery of the cross-section of the H-shaped steel: h1 > H, h2 > H, and b1 > B; ② -30° ≤ θ ≤ 30°; ③ 1.5 MPa ≤ P1 ≤ 0.006*H + 0.05*t2, 1.5 MPa ≤ P2 ≤ 0.004*H + 0.02*t2, and 1.5 MPa ≤ P3 ≤ 0.005*B + 0.05*t2.

[0067] Step 2: Open the selected nozzles 223 in the side water spraying assemblies 2, the upper water spraying assembly 3, and the lower water spraying assembly 4 (control the opening and closing of the nozzles 223 through the corresponding water pressure regulating valves 226). The H-shaped steel is conveyed on the conveying roller table 1 at a set speed, so that the H-shaped steel is water-cooled during the conveying process.

[0068] Step 3: Detect the internal and external temperature difference and the vertical temperature difference at one or more locations on the H-beam cross section to determine the temperature uniformity of the H-beam cross section; if the temperature uniformity of the H-beam cross section does not meet the requirements, check the relevant parameters set in Step 1 and make real-time adjustments.

[0069] The specific method is as follows: 1) Selecting temperature measurement points: The temperature measurement points selected for H-beam cross-section temperature uniformity include two sets of temperature measurement points arranged opposite each other on the inner and outer sides at 1 / 4 of the flange width (near the end of the upper flange) (see T1 and T3, T5 and T7 arranged oppositely in the figure, where T1 and T5 are located on the outer side of the flange, and T3 and T7 are located on the inner side of the flange) and two sets of temperature measurement points arranged opposite each other on the inner and outer sides at 1 / 4 of the flange width (near the end of the lower flange) (see T2 and T4, T6 and T8 arranged oppositely in the figure, where T2 and T6 are located on the outer side of the flange, and T4 and T8 are located on the inner side of the flange). 2) Uniformity judgment: When the temperature difference between the inner and outer sides of two opposite temperature measurement points at the same position in the four sets of temperature measurement points is not greater than 15℃, and the temperature difference between two upper and lower temperature measurement points on the same side in the four sets of temperature measurement points is not greater than 20℃, the temperature uniformity of the H-beam cross-section meets the requirements. That is, when |T1-T3|, |T2-T4|, |T5-T7| and |T6-T8|≤15℃ and |T1-T2|, |T3-T4|, |T5-T6| and |T7-T8|≤20℃, the temperature uniformity of the H-beam section meets the requirements.

[0070] Of course, the location of the above temperature measurement points is the key to the performance stability of H-beams. Moreover, the above set of temperature measurement points are located at the same cross section of the H-beam. In order to further improve the reliability of the uniformity judgment, multiple sets of the above temperature measurement points can be arranged at intervals along the length of the H-beam. Of course, as needed, three or more locations can also be selected in the flange width direction.

[0071] The following examples will illustrate the methods for cooling control of H-beams of different specifications.

[0072] Example 1

[0073] This embodiment selects an H-beam with specifications of H418×408×21×30mm. The web height H of the H-beam is 418mm, the flange width B is 408mm, the web thickness t1 is 21mm, and the flange thickness t2 is 30mm. These parameters are input into the host computer. Since the outer cross-section of this rolled piece is relatively small and the flange thickness is only 30mm, side nozzles numbered P11~P13 and P21~P23, lower nozzles numbered P42~P44, and upper nozzles numbered P33~P35 are selected. The concave distance in the middle of water pipe I31 is 200mm, which is the value of B0-B1. The cooling control method for this H-beam is as follows:

[0074] (1) Before conducting the controlled cooling process test, the positions of multiple water spray components were adjusted. The horizontal telescopic drive component 23 and the lifting drive component 32 were adjusted according to the specifications of the H-beam so that H0 = 520mm, B0 = 620mm, and B1 = 420mm, ensuring that the nozzle 223 of the upper water spray component 3 is in contact with the H-beam rolled piece, and preventing the rolled piece from tilting upward and colliding with the nozzle 223 during operation.

[0075] (2) Adjust the length, angle and pressure of nozzle 223 according to the specifications of the rolled piece, so that |θ|=20°, P1=3.8MPa, P2=2.1MPa, P3=3.3MPa, h1=440mm, h2=425mm, h3=430mm, and turn on nozzle 223 for cooling.

[0076] (3) After water cooling, the temperature of a section of the H-beam is measured at a certain position. The temperatures obtained are T1 = 720℃, T2 = 725℃, T3 = 722℃, T4 = 720℃, T5 = 722℃, T6 = 718℃, T7 = 726℃, and T8 = 724℃.

[0077] Example 2

[0078] The difference from Example 1 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, H0 = 810 mm, B0 = 620 mm, and B1 = 420 mm are adjusted to achieve |θ| = 30°, P1 = 3.8 MPa, P2 = 2.1 MPa, and P3 = 3.3 MPa. After water cooling, the temperature at a certain cross-section of the H-beam is measured, and the obtained temperatures are T1 = 712℃, T2 = 710℃, T3 = 721℃, T4 = 719℃, T5 = 714℃, T6 = 713℃, T7 = 723℃, and T8 = 718℃.

[0079] Example 3

[0080] The difference from Examples 1 and 2 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, H0 = 650mm, B0 = 600mm, and B1 = 400mm are adjusted to achieve |θ| = 10°, P1 = 3MPa, P2 = 1.8MPa, and P3 = 2.5MPa. After water cooling, the temperature at a certain section of the H-beam is measured, and the obtained temperatures are T1 = 698℃, T2 = 702℃, T3 = 712℃, T4 = 715℃, T5 = 715℃, T6 = 711℃, T7 = 702℃, and T8 = 698℃.

[0081] Comparative Example 1

[0082] The difference from Example 1 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam, specifically the value of H0. Specifically, H0 is adjusted to 500 mm, while other parameters remain unchanged. After water cooling, the temperature at a specific section of the H-beam is measured, yielding the following temperatures: T1 = 688℃, T2 = 695℃, T3 = 712℃, T4 = 712℃, T5 = 698℃, T6 = 698℃, T7 = 711℃, and T8 = 712℃.

[0083] Comparative Example 2

[0084] The difference from Example 1 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam, specifically the value of |θ|. Specifically, |θ| is adjusted to 35°, while other parameters remain unchanged. After water cooling, the temperature at a specific cross-section of the H-beam is measured, yielding the following temperatures: T1 = 702℃, T2 = 724℃, T3 = 714℃, T4 = 718℃, T5 = 712℃, T6 = 718℃, T7 = 710℃, and T8 = 708℃.

[0085] Comparative Example 3

[0086] The difference from Example 1 lies in the adjustment parameters of the controlled cooling system for the heavy H-beams, specifically the value of P1. Specifically, P1 is adjusted to 5 MPa, while other parameters remain unchanged. After water cooling, the temperatures at a specific section of the H-beam are measured: T1 = 713℃, T2 = 718℃, T3 = 685℃, T4 = 715℃, T5 = 712℃, T6 = 705℃, T7 = 689℃, and T8 = 716℃.

[0087] Comparative Example 4

[0088] The difference from Example 1 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, the values ​​of P2 and P3 are different; P2 is adjusted to 3 MPa and P3 to 4 MPa, while other parameters remain unchanged. After water cooling, the temperature at a certain cross-section of the H-beam is measured, and the obtained temperatures are: T1 = 688℃, T2 = 689℃, T3 = 716℃, T4 = 692℃, T5 = 692℃, T6 = 701℃, T7 = 718℃, and T8 = 690℃.

[0089] Comparative Example 5

[0090] The difference from Example 1 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, the values ​​of h1 and h2 are different; h1 is adjusted to 400mm and h2 to 380mm, while other parameters remain unchanged. After water cooling, the temperature at a certain cross-section of the H-beam is measured, and the obtained temperatures are T1 = 705℃, T2 = 715℃, T3 = 715℃, T4 = 712℃, T5 = 711℃, T6 = 719℃, T7 = 711℃, and T8 = 701℃.

[0091] The parameter adjustment tables and temperature measurement tables for Examples 1-3 and Comparative Examples 1-4 are shown in Table 1 and Table 2, respectively.

[0092] Table 1. Parameter Adjustment Table for Examples 1-3 and Comparative Examples 1-4

[0093]

[0094] Table 2 Temperature Measurement Tables for Examples 1-3 and Comparative Examples 1-4

[0095]

[0096] In summary, a comparison of Tables 1 and 2 shows that only when 100mm ≤ H0 - H ≤ 400mm and 0.5B are satisfied... <B1<1.5B<B0<2.5B、-30°≤θ≤30°、1.5MPa≤P1≤0.006*H+0.05*t2、1.5MPa≤P2≤0.004*H+0.02*t2、1.5MPa≤P3≤0.005*B+0.05*t2、h1> When H, h2>H and b1>B

[0097] That is, simultaneously satisfying: 518mm≤H0≤818mm, 612mm <B0<1020mm,204mm<B1<612mm,0<|θ|≤30°,1.5MPa≤P1≤4.008MPa,1.5MPa≤P2≤2.272MPa,1.5MPa≤P3≤3.54MPa,h1> When h1>418mm, h2>418mm, and h3>408mm, the temperature differences between the inside and outside of the H-beam section |T1-T3|, |T2-T4|, |T5-T7|, and |T6-T8| are ≤15℃, and |T1-T2|, |T3-T4|, |T5-T6|, and |T7-T8| are ≤20℃. The temperature uniformity of the H-beam section meets the requirements.

[0098] Example 4

[0099] This embodiment selects an H-beam with specifications of H474.6×424×47.6×77mm. The web height H of the H-beam is 474.6mm, the flange width B is 424mm, the web thickness t1 is 47.6mm, and the flange thickness t2 is 77mm. These parameters are input into the host computer. Since the outer cross-section of this rolled piece is relatively small, but the flange thickness is 77mm, side nozzles numbered P11~P14 and P21~P24, lower nozzles numbered P41~P45, and upper nozzles numbered P31~P37 are selected. The concave distance in the middle of water pipe I31 is 330mm, which is the value of B0-B1. The cooling control method for this H-beam is as follows:

[0100] (1) Before conducting the controlled cooling process test, the positions of multiple water spray components were adjusted. The horizontal telescopic drive component 23 and the lifting drive component 32 were adjusted according to the specifications of the H-beam so that H0 = 580mm, B0 = 680mm, and B1 = 350mm, ensuring that the nozzle 223 of the upper water spray component 3 is in contact with the H-beam rolled piece, and preventing the rolled piece from tilting upward and colliding with the nozzle 223 during operation.

[0101] (2) Adjust the length, angle and pressure of nozzle 223 according to the specifications of the rolled piece, so that |θ|=15°, P1=6.0MPa, P2=3.2MPa, P3=5.0MPa, h1=480mm, h2=475mm, h3=450mm, and turn on nozzle 223 for cooling.

[0102] (3) After water cooling, the temperature of a section of the H-beam is measured at a certain position. The temperatures obtained are T1 = 582℃, T2 = 589℃, T3 = 578℃, T4 = 581℃, T5 = 579℃, T6 = 578℃, T7 = 582℃, and T8 = 590℃.

[0103] Example 5

[0104] The difference from Example 4 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, H0 = 870mm, B0 = 750mm, and B1 = 420mm are adjusted to achieve |θ| = 30°, P1 = 1.5MPa, P2 = 1.5MPa, and P3 = 1.5MPa. After water cooling, the temperature at a certain cross-section of the H-beam is measured, and the obtained temperatures are T1 = 577℃, T2 = 579℃, T3 = 590℃, T4 = 592℃, T5 = 578℃, T6 = 581℃, T7 = 589℃, and T8 = 592℃.

[0105] Example 6

[0106] The difference from Examples 4 and 5 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, H0 = 750mm, B0 = 700mm, and B1 = 370mm are adjusted to achieve |θ| = 10°, P1 = 4.0MPa, P2 = 2.5MPa, and P3 = 3.5MPa. After water cooling, the temperature at a certain cross-section of the H-beam is measured, and the obtained temperatures are T1 = 576℃, T2 = 580℃, T3 = 588℃, T4 = 589℃, T5 = 578℃, T6 = 586℃, T7 = 586℃, and T8 = 583℃.

[0107] Comparative Example 6

[0108] The difference from Example 4 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, the values ​​of B0 and B1 are different; B0 is adjusted to 980mm and B1 to 650mm, while other parameters remain unchanged. After water cooling, the temperature at a certain cross-section of the H-beam is measured, and the obtained temperatures are T1 = 578℃, T2 = 572℃, T3 = 582℃, T4 = 589℃, T5 = 588℃, T6 = 571℃, T7 = 572℃, and T8 = 589℃.

[0109] Comparative Example 7

[0110] The difference from Example 4 lies in the adjustment parameters of the controlled cooling system for the heavy H-beams, specifically the value of |θ|. Specifically, |θ| is adjusted to 35°, while other parameters remain unchanged. After water cooling, the temperatures at a specific section of the H-beam are measured: T1 = 562℃, T2 = 582℃, T3 = 572℃, T4 = 578℃, T5 = 572℃, T6 = 578℃, T7 = 578℃, and T8 = 569℃.

[0111] Comparative Example 8

[0112] The difference from Example 4 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, the value of P1 is different; P1 is adjusted to 7.0 MPa, P2 to 4.0 MPa, and P3 to 6.5 MPa, while other parameters remain unchanged. After water cooling, the temperature at a certain cross-section of the H-beam is measured, and the obtained temperatures are T1 = 541℃, T2 = 523℃, T3 = 541℃, T4 = 543℃, T5 = 562℃, T6 = 541℃, T7 = 544℃, and T8 = 538℃.

[0113] Comparative Example 9

[0114] The difference from Example 4 lies in the adjustment parameters of the controlled cooling system for the heavy H-beam. Specifically, the values ​​of h1 and h2 are different; h1 is adjusted to 450 mm and h2 to 420 mm, while other parameters remain unchanged. After water cooling, the temperature at a certain cross-section of the H-beam is measured, and the obtained temperatures are T1 = 571℃, T2 = 568℃, T3 = 577℃, T4 = 581℃, T5 = 561℃, T6 = 566℃, T7 = 579℃, and T8 = 564℃.

[0115] The parameter adjustment tables and temperature measurement tables for Examples 4-6 and Comparative Examples 6-9 are shown in Table 3 and Table 4, respectively.

[0116] Table 3. Parameter Adjustment Table for Examples 4-6 and Comparative Examples 6-9

[0117]

[0118] Table 4. Temperature measurements of Examples 4-6 and Comparative Examples 6-9

[0119]

[0120] In summary, a comparison of Tables 3 and 4 shows that only when 100mm ≤ H0 - H ≤ 400mm and 0.5B are met... <B1<1.5B<B0<2.5B、-30°≤θ≤30°、1.5MPa≤P1≤0.006*H+0.05*t2、1.5MPa≤P2≤0.004*H+0.02*t2、1.5MPa≤P3≤0.005*B+0.05*t2、h1> When H, h2>H and b1>B

[0121] That is, it simultaneously satisfies: 574.6mm ≤ H0 ≤ 874.6mm, 636mm <B0<1060mm,212mm<B1<636mm,0<|θ|≤30°,1.5MPa≤P1≤6.6976MPa,1.5MPa≤P2≤3.4384MPa,1.5MPa≤P3≤5.97MPa,h1> When h2>474.6mm, h3>424mm, the temperature differences between the inside and outside of the H-beam section |T1-T3|, |T2-T4|, |T5-T7| and |T6-T8| are ≤15℃ and |T1-T2|, |T3-T4|, |T5-T6| and |T7-T8| are ≤20℃, the temperature uniformity of the H-beam section meets the requirements.

[0122] In summary, this invention is applicable to the cooling of H-beams with a flange thickness of 30mm or more or a weight per meter greater than 200KG. The controlled cooling system includes a water spray assembly positioned close to the outer cross-section of the H-beam. The position of the water spray assembly can be adjusted according to different H-beam specifications, allowing the nozzles on the assembly to conform to the shape of the H-beam's outer cross-section, completely covering it. A predetermined distance is maintained between the nozzles and the H-beam's outer cross-section. Furthermore, the number of nozzles, appropriate spray angle, and spray pressure can be adjusted according to different H-beam specifications, thereby achieving reliable cooling of the outer surface of H-beams of different specifications. This ensures uniform cooling of the entire H-beam's outer cross-section, improves the stability of H-beam product performance, and is suitable for widespread use in production plants.

[0123] The above description is merely an illustration of some principles of the present invention. This specification is not intended to limit the present invention to the specific structures and applicable scope shown. Therefore, all possible modifications and equivalents that may be used fall within the scope of the patent application of this invention.

Claims

1. A controlled cooling system for heavy-duty H-beams, characterized in that, It includes a conveyor roller and multiple sets of water spraying assemblies spaced along its length and conforming to the shape of the H-beam cross section. The water spraying assemblies include side water spraying assemblies that are horizontally slidably installed on both sides of the conveyor roller, an upper water spraying assembly that is vertically lifted and lowered above the conveyor roller, and a lower water spraying assembly installed inside the conveyor roller. The side spray water assembly includes a side spray water tank that is slidably mounted on the frame of the conveyor roller along the width direction of the conveyor roller. Multiple sets of side nozzle assemblies are mounted on the side spray water tank. The outer side of the side spray water tank is connected to a horizontal telescopic drive component. The outer side of the side spray tank is connected to the water supply equipment via a water supply pipeline, and the inner side of the side spray tank is connected to multiple sets of side nozzle assemblies via a water pump I. The multiple sets of side nozzle assemblies are arranged at intervals along the height direction of the inner side of the side spray tank. The upper water spray assembly includes a water pipe I recessed along the center line of the conveyor roller. The upper side of the water pipe I is connected to a support frame fixed on the frame via a lifting drive component. Multiple sets of upper nozzle assemblies are installed on the lower side of the water pipe I. The lower spray water assembly includes a water pipe II protruding along the center line of the conveying roller conveyor. The end of the water pipe II is connected to a water supply device through a water supply pipeline. The upper side of the water pipe II is connected to multiple sets of lower nozzle assemblies through a water pump III. The multiple sets of lower nozzle assemblies are arranged at intervals along the upper side of the water pipe II, and the highest point of the multiple sets of lower nozzle assemblies is not higher than the conveying roller surface of the conveying roller conveyor. The side nozzle assembly, upper nozzle assembly and lower nozzle assembly have the same structure, each including a mounting bracket fixed on the side spray tank, water pipe I or water pipe II, and multiple nozzles are rotatably connected to the mounting bracket, with one end of each of the multiple nozzles connected by an angle adjustment mechanism. The angle adjustment mechanism includes a hinge frame connected between two adjacent nozzles. The nozzle near one end of the mounting frame is connected to the mounting frame via an adjusting screw, and the nozzle near the other end of the mounting frame is hinged to the mounting frame.

2. The controlled cooling system for heavy H-beams according to claim 1, characterized in that: The end of the water pipe I is connected to the water supply equipment via a water supply pipeline. The lower side of the water pipe I is connected to multiple sets of upper nozzle assemblies via a water pump II. The multiple sets of upper nozzle assemblies are arranged at intervals along the lower side of the water pipe I.

3. The controlled cooling system for heavy H-beams according to claim 1, characterized in that: One end of each of the multiple nozzles is connected to a water outlet branch pipe via a flexible hose, and a water pressure regulating valve is installed inside the water outlet branch pipe; the multiple water outlet branch pipes converge and are connected to the side spray water tank, water pipe I or water pipe II via a main water inlet pipe, and a water pump I, water pump II or water pump III is installed inside the main water inlet pipe.

4. The controlled cooling system for heavy H-beams according to claim 1, characterized in that: The mounting bracket includes two fixing plates fixed to the side spray tank, water pipe I or water pipe II, and two mounting plates fixed between them, with a plurality of nozzles installed at intervals along the length of the two mounting plates.

5. The controlled cooling system for heavy-duty H-beams according to claim 1, characterized in that: A distance measuring sensor I is installed on the side spray water assembly on one side of the conveyor roller conveyor to detect the distance between two opposing side spray water assemblies. A distance measuring sensor II is installed on the upper spray water assembly to detect the distance between itself and the conveyor roller surface of the conveyor roller conveyor. The distance measuring sensor I and the distance measuring sensor II are connected to the horizontal telescopic drive component and the lifting drive component through a PLC. The host computer is connected to the PLC to communicate and input instructions to the PLC.

6. A method for controlling the cooling of heavy H-beams, employing the heavy H-beam cooling control system as described in any one of claims 1 to 5, characterized in that: Includes the following steps: Step 1: Adjust the positions of the side spray assembly and the top spray assembly according to the specifications of the H-beam. Select the corresponding number and position of nozzles on the side spray assembly, the top spray assembly and the bottom spray assembly to work, and adjust the nozzle angle and spray pressure. Step 2: Turn on the side spray assembly, upper spray assembly and lower spray assembly, and the H-beam is water-cooled during the conveyor roller conveyor process; Step 3: Detect the internal and external temperature difference and the vertical temperature difference at one or more locations on the H-beam cross section to determine the temperature uniformity of the H-beam cross section; if the temperature uniformity of the H-beam cross section does not meet the requirements, check the relevant parameters set in Step 1 and make real-time adjustments.

7. The cooling control method for heavy H-beams according to claim 6, characterized in that: The relevant parameters in step 1 include the specifications of the H-beams and the parameters of each water spray assembly. The specifications of the H-beam include: web height H, flange width B, web thickness t1, and flange thickness t2; the parameters of each water spray assembly include: the distance H0 between the two side water spray assemblies, the maximum height B0 between the upper water spray assembly and the conveyor roller, the minimum height B1 between the upper water spray assembly and the conveyor roller, the difference in spray angle θ between two adjacent nozzles in a set of nozzle assemblies, the pressure P1 of the nozzles in the upper water spray assembly, the pressure P2 of the nozzles in the lower water spray assembly, and the pressure P3 of the nozzles in the side water spray assembly, the total transverse length h1 of the selected nozzles in the upper water spray assembly along the web height direction of the H-beam, the total transverse length h2 of the selected nozzles in the upper water spray assembly along the web height direction of the H-beam, and the total vertical length b1 of the selected nozzles in the side water spray assembly along the flange width direction of the H-beam; wherein, the specification range of the H-beam is t2≥30mm or the weight per meter is greater than 200kg; The position adjustment of the side spray assembly and the top spray assembly needs to meet the following requirements: 100mm ≤ H0 - H ≤ 400mm, 0.5B <B1<1.5B<B0<2.5B; The selection of nozzles for the side spray assembly, upper spray assembly, and lower spray assembly must meet the following requirements: 1) The nozzles must cover the outer perimeter of the H-beam cross-section: h1>H, h2>H, and b1>B; 2) -30°≤θ≤30°; 3) 1.5MPa≤P1≤0.006*H+0.05*t2, 1.5MPa≤P2≤0.004*H+0.02*t2, and 1.5MPa≤P3≤0.005*B+0.05*t2.

8. The cooling control method for heavy H-beams according to claim 6, characterized in that: In step 3, the temperature measurement points selected for the H-beam cross-section temperature uniformity include four sets of temperature measurement points arranged opposite each other on the inner and outer sides at 1 / 4 of the flange width; when the temperature difference between the inner and outer temperature measurement points at the same position is no greater than 15℃, and the temperature difference between the upper and lower temperature measurement points on the same side is no greater than 20℃, the temperature uniformity of the H-beam cross-section meets the requirements.

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