Aerosol cooling device of profile steel cooling bed and profile steel production line

Abstract

The utility model provides a profile steel cooling bed aerial fog cooling device which comprises a support, and a cooling nozzle collecting pipe, a water collecting tank and a U-shaped return water collecting tank are sequentially arranged on the support from top to bottom. A plurality of rows of cooling nozzle collecting pipes are arranged, a plurality of cooling nozzles are arranged on each row of cooling nozzle collecting pipes, the cooling nozzles are water-gas mixing atomizing nozzles, the bottom of each water collecting tank is connected with a water collecting tank water falling branch pipe, and cooling water sprayed by each cooling nozzle is collected by each water collecting tank and then converged into the U-shaped return water collecting tank through the water collecting tank water falling branch pipe. The aerial fog cooling device for the profile steel cooling bed is used for auxiliary cooling after hot-rolled long-time-length profiles are placed on the cooling bed, and the problem that the cooling capacity of the profile steel cooling bed is insufficient can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of profile steel production, concretely relates to a profile steel cooling bed aerosol cooling device and profile steel production line. BACKGROUND

[0002] Many domestic profile steel production lines, in order to pursue high output, rolling mill, heating furnace capacity are all exerted to the extreme, but the cooling bed cooling capacity is insufficient, and the temperature of the rolled piece under the cooling bed is too high (more than 80 DEG C). After high-temperature straightening, the internal stress generated in the cooling process of the rolled piece will make the straightened rolled piece bend again. The cooling bed capacity becomes the bottleneck process of the whole line production. In addition, the size of the cooling bed is selected to be small in the design stage of some profile steel production lines to reduce investment, and the natural cooling capacity is insufficient, which will seriously restrict the exertion of the capacity of the whole production line. SUMMARY

[0003] In view of the deficiency of prior art, the utility model provides a profile steel cooling bed aerosol cooling device, which mainly solves the problem of insufficient cooling of the cooling bed of the existing profile steel production line.

[0004] To achieve the above purpose, the utility model is realized through the following technical scheme:

[0005] The utility model provides a profile steel cooling bed aerosol cooling device, which comprises a support, and cooling nozzle headers, water collecting tanks and U-shaped water return collecting tanks are sequentially arranged on the support from top to bottom.

[0006] The cooling nozzle headers are provided with multiple rows, multiple cooling nozzles are arranged on each cooling nozzle header, the cooling nozzles are water-gas mixed atomizing nozzles, each water collecting tank bottom is connected with a water collecting tank water falling branch pipe, and the cooling water sprayed by each cooling nozzle is collected by each water collecting tank and then is collected into the U-shaped water return collecting tank through the water collecting tank water falling branch pipe.

[0007] Preferably, each cooling nozzle is provided with a separate manual valve to control the opening and closing of the cooling nozzle.

[0008] Preferably, each row of cooling nozzles is provided with a separate water supply pipeline and gas supply pipeline, and the water supply pipeline and the gas supply pipeline are both provided with electric valves to control the opening and closing.

[0009] Preferably, the water supply pipeline of each row of cooling nozzles comprises a water supply main pipeline and a water supply branch pipeline, and each cooling nozzle is connected to the water supply main pipeline through a separate water supply branch pipeline; the gas supply pipeline of each row of cooling nozzles comprises a gas supply main pipeline and a gas supply branch pipeline, and each cooling nozzle is connected to the gas supply main pipeline through a separate gas supply branch pipeline.

[0010] The utility model discloses still provide a kind of profile steel production line, it is characterized by, including cooling bed, the rack below cooling bed is equipped with the profile steel cooling bed aerosol cooling device, profile steel cooling bed aerosol cooling device is arranged along the equal length of cooling bed width direction, the arrangement direction of each row cooling nozzle is perpendicular to the running direction of profile steel on cooling bed.

[0011] The utility model has the following beneficial effects:

[0012] The profile steel cooling bed aerosol cooling device provided by the utility model is used for the auxiliary cooling after hot-rolled long multiple-length section materials on the cooling bed, and can effectively alleviate the insufficient cooling capacity of the profile steel cooling bed. Since it is arranged along the length of the cooling bed width direction, it can ensure that the long multiple-length section materials are uniformly cooled along the length direction, so that the temperature of the section materials on the cooling bed is less than 80 DEG C, the straightening requirement is met, and the steel passing capacity of the cooling bed can be significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a top view (part) of profile steel cooling bed aerosol cooling device.

[0014] Figure 2 It is a sectional view of profile steel cooling bed aerosol cooling device along Figure 1 A-A line.

[0015] Figure 3 It is a sectional view of profile steel cooling bed aerosol cooling device along Figure 1 B-B line.

[0016] Figure 4 It is a sectional view of profile steel cooling bed aerosol cooling device in cooling bed.

[0017] DESCRIPTION OF THE DRAWINGS

[0018] 1, cooling nozzle header; 2, water collecting tank; 3, water falling branch pipe; 4, backwater collecting tank; 5, water supply main pipeline; 6, water supply branch pipeline; 7, support; 8, manual valve; 9, aerosol cooling device; 10, alignment roller; 11, section material. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with the drawings and examples.

[0020] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0021] AsFigures 1 to 4 As shown, the embodiment discloses a type steel cooling bed gas mist cooling device 9, which comprises a support 7, and a cooling nozzle manifold 1, a water collecting tank 2 and a water return collecting tank 4 are sequentially arranged on the support 7 from top to bottom. The cooling nozzle manifold 1 is provided with multiple rows, and multiple cooling nozzles are arranged on each row of the cooling nozzle manifold 1. Each cooling nozzle is provided with a separate manual valve 8 to control the opening and closing of the cooling nozzle. The cooling nozzle is a water-gas mixed atomizing nozzle. Each row of cooling nozzles is provided with a separate water supply pipeline and a gas supply pipeline, and the water supply pipeline and the gas supply pipeline are both provided with an electric valve to control the opening and closing of the cooling nozzle. Each water collecting tank 2 is connected with a water falling branch pipe 3 at the bottom, and the cooling water sprayed by the cooling nozzle is collected by each water collecting tank 2 and then flows into the water return collecting tank 4 (in the shape of U or other shapes) through the water falling branch pipe 3. The water return collecting tank 4 is connected with the total water return pipeline outside the type steel cooling bed gas mist cooling device 9.

[0022] The following will be described in combination with the specific cooling bed of a type steel production line in China:

[0023] The cooling bed comprises a steel feeding device, a movable rack, a static rack, an alignment roller 10, a steel discharging device and a transmission mechanism. In use, the type steel cooling bed gas mist cooling device 9 is arranged along the width direction of the cooling bed (perpendicular to the running direction of the long multiple type material 11) and is equal in length (or slightly shorter). The arrangement direction of each row of cooling nozzles is perpendicular to the running direction of the type steel on the cooling bed. In the embodiment, the size of the cooling bed (length x width) is 33 m x 102 mm (the length of the long multiple rolling piece upper cooling bed is generally ≤96 m), the total length of the type steel cooling bed gas mist cooling device 9 is about 100 m, four rows of cooling nozzle manifolds 1 are arranged, the interval between each row of cooling nozzles is about 400 mm, the interval between the same row of cooling nozzles is 500 mm, the number of cooling nozzles in each row is 200, and the total number of four rows of cooling nozzles is 800 (water-gas combined atomizing nozzles). The cooling nozzles of the type steel cooling bed gas mist cooling device 9 are arranged below the cooling bed rack, which can strongly cool the lower surface of the type material 11, and the upper surface of the type material 11 is cooled by the falling gas mist. If the natural cooling capacity of the cooling bed is relatively strong and the cooling capacity of the cooling bed meets the production capacity requirement of the rolling line, only two rows of cooling nozzle manifolds 1 can be arranged, and the type steel cooling bed gas mist cooling device 9 can be opened or closed according to the products and cooling requirements.

[0024] The spray cooling device is arranged before the alignment roller 10, which is about 20.7 m away from the input roller of the cooling bed. The high-temperature type material 11 (the temperature of the upper cooling bed is about 850-900℃) is naturally cooled between the input roller of the cooling bed and the gas mist cooling device 9. The gas mist cooling device 9 is opened when the type material 11 is cooled to below the phase transition temperature, which can avoid the phase transition of the cooling type material 11 and the generation of adverse organization, thereby affecting the product performance.

[0025] The gas mist cooling water is turbid ring water, and the pressure is 0.4-0.6 MPa. The cooling water consumption of each row of cooling nozzles is 52.5 m3 / h, the total cooling water volume is 210m³ 3 / h. In this embodiment, the diameter of the main water supply pipeline outside the steel section cooling bed aerosol cooling device 9 is DN250 (not shown in the attached figure). A pneumatic shut-off valve (not shown in the attached figure) is installed on the main water supply pipeline, which can be used to start and stop the spray cooling device from the main control room. To ensure water quality and avoid clogging of the cooling nozzles, a Y-type filter (not shown in the attached figure) is installed on the main water supply pipeline. The main water supply pipeline outside the steel section cooling bed aerosol cooling device 9 is connected to the water supply pipeline of each row of cooling nozzles. The water supply pipeline of each row of cooling nozzles includes a main water supply pipeline 5 and a branch water supply pipeline 6. Each cooling nozzle is connected to the main water supply pipeline 5 through a separate branch water supply pipeline 6. The diameter of the main water supply pipeline 5 is DN80.

[0026] The compressed air supply pressure is 0.4–0.6 MPa, and the compressed air consumption per row of cooling nozzles is 32 m³ / s. 3 / min, total consumption is 128m 3 / min. To ensure pressure stability, a 2m setting can be used. 3 The pressure stabilizing tank (not shown in the attached diagram). The diameter of the main air supply pipeline of the steel section cooling bed aerosol cooling device 9 is DN80 (not shown in the attached diagram). A pneumatic shut-off valve (not shown in the attached diagram) is installed on the main air supply pipeline, which can be started and stopped from the main control room. The main air supply pipeline of the steel section cooling bed aerosol cooling device 9 is connected to the air supply pipeline of each row of cooling nozzles. The air supply pipeline of each row of cooling nozzles includes a main air supply pipeline and a branch air supply pipeline. Each cooling nozzle is connected to the main air supply pipeline through a separate branch air supply pipeline. The diameter of the main air supply pipeline is DN32.

[0027] Cooling water and compressed air are sprayed onto the rolled workpiece in an atomized state. The mixing ratio of compressed air and water in the cooling nozzle is controlled by adjusting the pressure (using a pneumatic pressure regulating valve installed on the main air supply pipeline) to form the required atomization state. The atomized water is then sprayed onto the surface of the rolled workpiece for heat exchange to achieve the cooling effect.

[0028] Aerosol cooling offers superior cooling capabilities compared to water cooling or air cooling:

[0029] High-pressure air can spray water particles onto the surface of steel, breaking up the air film formed on the steel surface due to high temperature, greatly enhancing heat transfer efficiency and improving cooling effect.

[0030] The cooling rate can be adjusted by regulating the ratio of water to air.

[0031] The dispersed mist particles fall in a surface pattern, resulting in a more uniform cooling surface.

[0032] The cooled cooling water is collected by the water collecting tank 2, and each water collecting tank 2 collects the cooled cooling water through the water falling branch pipe 3 (with a pipe diameter of DN80) to the water collecting tank 4, and then to the total water return pipe.

[0033] The number of the water collecting tank 2 can be selected according to the size of the cooling bed, and the Figure 1 and 3 only four as shown in the drawings. The water collecting tank 2 is trumpet-shaped, which can effectively collect the cooling water after the air mist spraying, and a part of the cooling water not collected is evaporated, and a small amount of cooling water falls into the drainage ditch of the cooling bed foundation pit for collection.

[0034] The air mist cooling device 9 for the shaped steel cooling bed is used for the auxiliary cooling of the long multiple length profile 11 after the hot rolling and the cooling bed, which can effectively alleviate the problem of insufficient cooling capacity of the shaped steel cooling bed. Since it is arranged along the width direction of the cooling bed, it can ensure the uniform cooling of the long multiple length profile 11 along the length direction, and the temperature of the profile 11 under the cooling bed is less than 80℃, which meets the straightening requirement, and at the same time, the steel passing capacity of the cooling bed can be improved.

[0035] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no contradiction and conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A profile steel cooling bed air mist cooling device, characterized in that, The support comprises, from top to bottom, a cooling nozzle manifold, a water collecting tank and a U-shaped water collecting tank. The cooling nozzle manifold is provided with multiple columns, each column being provided with multiple cooling nozzles, the cooling nozzles being water-air mixed atomizing nozzles, and each water collecting tank being connected with a water collecting tank water falling branch pipe, the cooling water sprayed by each cooling nozzle being collected by each water collecting tank and then being introduced into the U-shaped water collecting tank through the water collecting tank water falling branch pipe.

2. The gas mist cooling device for a steel bar cooling bed according to claim 1, wherein Each cooling nozzle is provided with a separate manual valve for controlling the opening and closing of the cooling nozzle.

3. The profile steel cooling bed air mist cooling device according to claim 2, characterized in that, Each column of cooling nozzles is provided with a separate water supply pipeline and a separate air supply pipeline, and each pipeline is provided with an electric valve for controlling the opening and closing.

4. The profile steel cooling bed air mist cooling device according to claim 3, characterized in that, The water supply pipeline of each column of cooling nozzles comprises a water supply main pipeline and a water supply branch pipeline, and each cooling nozzle is connected to the water supply main pipeline through a separate water supply branch pipeline; the air supply pipeline of each column of cooling nozzles comprises an air supply main pipeline and an air supply branch pipeline, and each cooling nozzle is connected to the air supply main pipeline through a separate air supply branch pipeline.

5. A profile steel production line, characterized by The cooling bed is provided with the profile steel cooling bed gas mist cooling device as claimed in claim 4 below the rack of the cooling bed, the profile steel cooling bed gas mist cooling device being arranged in the same length along the width direction of the cooling bed, and the arrangement direction of each column of cooling nozzles being perpendicular to the running direction of the profile steel on the cooling bed.

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