CN217377969U - Device for flexibly cooling tempered steel plate - Google Patents
Device for flexibly cooling tempered steel plate Download PDFInfo
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- CN217377969U CN217377969U CN202220394664.0U CN202220394664U CN217377969U CN 217377969 U CN217377969 U CN 217377969U CN 202220394664 U CN202220394664 U CN 202220394664U CN 217377969 U CN217377969 U CN 217377969U
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Abstract
The utility model relates to a device for flexible cooling after tempering of a steel plate, which comprises an air supply component, a steam fog component, a cooling component, a fixing component and a roller bed frame, wherein the air supply component is communicated with the cooling component; the steam fog assembly is arranged below the air supply assembly, is connected with the cooling assembly and is arranged between the cooling assembly and the air supply assembly; the cooling assemblies are arranged below the fixing assembly and above the roller bed rack and are used for cooling the steel plate in a segmented manner; the fixed assembly is arranged above the roller way rack, and the cooling assembly and the rollers are arranged above the roller way rack. The utility model discloses a device can accurately regulate and control each stage cooling rate of steel sheet cooling and steel sheet plate-shape, satisfies the heterogeneous many yards of steel sheet and organizes required complicated cooling path control of regulation and control and high accuracy plate-shape control needs. The device solves the problems of low cooling efficiency, poor controllability of a process path, poor shape of a cooling plate, missing of an organization regulation and control means and the like after the existing steel plate is tempered, and improves the production efficiency and the quality of the steel plate.
Description
Technical Field
The utility model relates to a be used for flexible refrigerated device after steel sheet tempering belongs to steel thermal treatment technical field.
Background
Tempering is generally used to reduce or eliminate internal stresses in quenched steel plates to improve their ductility or toughness. Through the matching of the quenching and tempering processes, the steel plate can obtain excellent mechanical properties. In general, steel plates on a production line are tempered and then air-cooled to room temperature on a cooling bed or a roller table. However, this method has the following disadvantages: firstly, the natural convection temperature of the steel plate is slowly reduced, a longer cooling roller bed or a larger cooling bed is required to be arranged, the equipment investment is increased, and the production efficiency is low; secondly, the contact position of the steel plate and the cooling equipment is relatively fixed, so that the steel plate with a thinner specification is easy to deform in the cooling process.
With the development of the steel plate structure regulation theory and technology, researches find that the cooling path control is implemented by utilizing the temperature drop process of the high-temperature steel plate after tempering, the complex phase structure of the quenched martensite structure, the tempered martensite structure and the residual austenite structure of the steel plate is further regulated and controlled, and the multiphase multi-scale composite precipitated structure is obtained by combining the precipitation control in the steel plate temperature drop process, so that the method becomes a new technical development direction. The technology aims to remarkably improve the toughness, the processing performance and the service performance of the steel plate through the application of comprehensive strengthening and toughening mechanisms such as phase change, precipitation, fine grains and the like. However, in order to realize the multiphase and multi-scale organization regulation and control technology of the steel plate, a cooling device behind a tempering furnace needs to be added, and the steel plate has the following functions: accurately controlling the temperature reduction process after the steel plate is tempered, and cooling according to a process path; secondly, the cooling speed adjusting range is wide, so that the steel plate can be quickly cooled, and flexible cooling can be realized; and thirdly, the shape of the steel plate is not deteriorated in the cooling process, and the residual stress of the steel plate is not increased. However, no relevant cooling device or cooling control method has been found in the prior art publications until now.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to solve the problems of low tempering heat treatment efficiency, low cooling efficiency after tempering, poor controllability of process paths, poor shape of a cooling plate, missing of tissue regulation and control means and the like of the existing steel plate, the utility model provides a device for flexibly cooling the steel plate after tempering, which can meet the requirements of high uniformity, high precision, high efficiency tempering heat treatment and tissue regulation and control of high-strength steel plates.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
a device for flexibly cooling a tempered steel plate comprises an air supply assembly, a steam fog assembly, a cooling assembly, a fixing assembly and a roller bed rack, wherein the air supply assembly is communicated with the cooling assembly and used for providing cooling air; the steam and fog assembly is arranged below the air supply assembly, is connected with the cooling assembly and is arranged between the cooling assembly and the air supply assembly, and is used for providing steam and fog; the cooling assemblies are arranged below the fixing assemblies and above the roller bed rack and are used for cooling the steel plate in a segmented manner; the fixing assembly is arranged above the roller way rack, a cooling assembly and a plurality of rollers are arranged above the roller way rack, and the rollers are used for conveying steel plates; when the cooling device works, a steel plate to be cooled is arranged between the fixing assembly and the roller bed frame and is arranged on the roller.
The device for flexibly cooling the tempered steel plate is arranged behind the roller hearth type tempering furnace and in front of the output roller way.
In the above device, preferably, the air supply assembly includes a fan, a primary air collecting pipe, an air supply on-off valve, a secondary air collecting pipe, an air supply control valve set and a sub air supply pipeline; the fan is connected with a primary gas collecting pipe, the primary gas collecting pipe is connected with three or more secondary gas collecting pipes, an air supply opening and closing valve is arranged between the primary gas collecting pipe and the secondary gas collecting pipes, the secondary gas collecting pipes are connected with a cooling component through a sub-air supply pipeline, and the air supply control valve group is arranged between the secondary gas collecting pipes and the sub-air supply pipelines; the air supply control valve group comprises a hand valve, a flow regulating valve and a flowmeter.
The device preferably comprises a blower providing 10-20 kPa, 10000-15000 m 3 Cooling air of/h.
The device as described above, preferably, the steam fog assembly includes a main water supply pipeline, a main air supply pipeline and a plurality of steam fog generators, each steam fog generator is communicated with the main water supply pipeline and the main air supply pipeline, and the plurality of steam fog generators are arranged in parallel; a water supply opening and closing valve is respectively arranged between the main water supply pipeline and each vapor generator; an air supply opening and closing valve is respectively arranged between the main air supply pipeline and each vapor generator; the vapor generator is communicated with the cooling assembly through a branch air supply pipeline.
In the above device, preferably, the foremost end of the main water supply pipeline is provided with a main water supply control valve group, and the main water supply control valve group is used for controlling the flow and pressure of the cooling water;
the foremost end of total air supply line sets up total air feed valve unit, air feed valve unit is used for controlling compressed air's flow and pressure.
The device preferably comprises a main water supply pipeline for supplying 20-60 m of water 3 Cooling water with pressure of 0.2-0.4 MPa; the total air supply pipeline provides flow of 10-20 m 3 H, and the pressure is 0.4-0.6 MPa.
The device as above, preferably, the vapour fog generator includes multiunit atomizing nozzle, atomizer chamber and drain valve, and the atomizer chamber is established to the cylinder size, multiunit the atomizing nozzle is the cylinder outer wall of cyclic annular embedding atomizer chamber, and each atomizing nozzle connects gas supply line and water supply pipe respectively, and the centre of atomizer chamber is provided with the observation window, one side that the atomizer nozzle was kept away from to the atomizer chamber is located to the drain valve.
The device as described above, preferably, the fixed subassembly includes fixed frame, movable frame, electric lift system and a plurality of anticollision backplate, electric lift system locates the top of fixed frame, movable frame installs in fixed frame, and electric lift system connects and drives movable frame and reciprocate, the below of movable frame is equipped with cooling module, and is a plurality of anticollision backplate is fixed to be located the below of movable frame for protection cooling module.
The flexible cooling device for the tempered steel plate is preferably provided with a plurality of anti-collision guard plates at intervals; a plurality of rollers are arranged at intervals; the anti-collision protection plate and the roller are arranged oppositely in the vertical direction.
As above device, preferably, cooling unit includes a plurality of upper cooling spray box and lower cooling spray box along the perpendicular symmetrical arrangement of surface about the steel sheet, and is a plurality of the below of removing the frame is located to upper cooling spray box interval, and is a plurality of the top of roll table frame is located to lower cooling spray box interval, and symmetrical arrangement's upper cooling spray box and lower cooling spray box are a set of cooling unit, and multiunit cooling unit is along steel sheet advancing direction parallel arrangement and divide into strong cold district, last cooling zone, 3 cooling zones in weak cold district, and all upper cooling spray boxes and all lower cooling spray boxes are all independently by 1 set of branch air supply pipeline, air supply control valves connection and realize independent air supply control in every cooling zone.
The device preferably comprises 3-6 groups of cooling units, and is positioned at the inlet side of the cooling device; the continuous cooling area comprises 3-6 groups of cooling units and is positioned in the middle of the cooling device; the weak cold area comprises 2-4 groups of cooling units and is located on the outlet side of the cooling device.
According to the device, preferably, the lower cooling spray box comprises a flow equalizing cavity and a plurality of cooling nozzles, the plurality of cooling nozzles are arranged on the upper panel of the flow equalizing cavity, and the spray openings of the cooling nozzles are in an oval shape with the long axis length of 15-25 mm and the short axis length of 7-15 mm; the cooling nozzles are arranged in three rows, and the cooling nozzles in two adjacent rows are arranged in a crossed manner; air inlets for connecting the sub air supply pipelines are arranged below the flow equalizing cavity, and 3-6 air inlets are arranged;
the upper cooling spray box and the lower cooling spray box are symmetrically arranged in structure;
when the cooling spraying box works, the distances between the cooling nozzles of the upper cooling spraying box and the lower cooling spraying box and the upper surface and the lower surface of the cold steel plate are equal.
(III) advantageous effects
The utility model has the advantages that:
the utility model provides a pair of a flexible refrigerated device for steel sheet tempering back, combine together strong wind cooling and vapour fog cooling, divide strong cold district along steel sheet advancing direction, last cooling space and weak cold district, through control cooling wind amount of wind and/or wind pressure, cooling water flow and/or water pressure, compressed air flow and/or atmospheric pressure, implement the flexibilization to the steel sheet, cool off according to process route, can accurately regulate and control steel sheet cooling each stage cooling rate and steel sheet plate shape, satisfy the required complicated cooling path control of the heterogeneous multiscale organization regulation and control of steel sheet and high accuracy plate shape control needs. The utility model discloses a device organically combines strong wind cooling and vapor fog cooling, implements the subregion cooling to different steel sheet temperature drop processes, realizes the steel sheet and makes flexibilization, cools off according to process route after tempering, has solved that current tempering back steel sheet cooling efficiency is low, process route controllability is poor, the plate-type worsens, organize regulation and control means disappearance scheduling problem to production efficiency and steel sheet quality can have been improved.
Drawings
FIG. 1 is a structural layout view of the device for flexible cooling after tempering a steel plate in the utility model;
fig. 2 is a schematic structural diagram of an aerosol generator according to the present invention;
fig. 3 is a schematic structural view of the cooling spray box of the present invention.
[ description of reference ]
1: means for cooling; 2: a steel plate; 3: an air supply assembly; 4: a vapor component; 5: fixing the frame; 6: a roller bed frame; 7: a roller hearth type tempering furnace; 8: a run-out table; 9: a roller; 10: a fan; 11: a primary gas collecting pipe; 12: an air supply opening/closing valve; 13: a secondary gas collecting pipe; 14: an air supply control valve group; 15: a branch air supply pipeline; 16: a cooling zone; 17: a hand valve; 18: a main water supply line; 19: a total gas supply line; 20: a water supply control valve group; 21: an air supply control valve group; 22: a water supply on-off valve; 23: an air supply opening/closing valve; 24: a vapor generator; 25: an atomizing nozzle; 26: an atomization chamber; 27: an observation window; 28: a drain valve; 29: a flow regulating valve; 30: a flow meter; 31: moving the frame; 32: an electric lift system; 33: an anti-collision guard plate; 34: an upper cooling spray box; 35: a lower cooling spray box; 36: a cooling unit; 37: a forced cooling area; 38: a continuous cooling zone; 39: a weak cold area; 40: an air inlet; 41: a flow equalizing cavity; 42: cooling the nozzle; 43: an elliptical spout; 44: and a top panel.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
Example 1
A device for flexibly cooling a tempered steel plate comprises an air supply assembly 3, a steam fog assembly 4, a cooling assembly, a fixing assembly and a roller bed frame 6, wherein the air supply assembly 3 is used for supplying cooling air for cooling a steel plate 2, and the air supply assembly 3 is communicated with the cooling assembly; steam fog subassembly 4 is used for providing the steam fog of cooling steel sheet 2, and steam fog subassembly 4 is located the below of air feed subassembly 3, and cooling module is used for the segmentation cooling steel sheet, and cooling module is connected to steam fog subassembly 4, and steam fog subassembly 4 is located between cooling module and the air feed subassembly 3. The cooling assemblies are arranged below the fixing assembly and above the roller bed rack and are used for cooling the steel plate in a segmented manner; the fixed component is arranged above the roller way rack 6, wherein rollers 9 which support and can transport steel plates are arranged above the roller way rack 6, and the rollers 9 are arranged in a plurality of spaced ways. A cooling component is fixed above the roller bed frame 6. The cooling device 1 is arranged behind the roller-hearth tempering furnace 7 and in front of an output roller way 8, and the steel plate 2 is convenient to transport through the rotation of a plurality of rollers 9. When the cooling device works, a steel plate to be cooled is arranged between the fixing component and the roller bed frame and is arranged above the rollers.
The air supply assembly 3 includes a fan 10, a primary air collecting pipe 11, an air supply opening and closing valve 12, a secondary air collecting pipe 13, an air supply control valve group 14, and a sub air supply pipeline 15. The fan 10 can provide 10-20 kPa, 10000-15000 m 3 Cooling air/h, blower 10 connectionThe primary gas collecting pipe 10 is respectively connected with three secondary gas collecting pipes 13 through air supply open-close valves 12, the secondary gas collecting pipes 13 are connected with a cooling component through air supply branch pipelines, and an air supply control valve bank is arranged between the air supply branch pipelines and the secondary gas collecting pipes. Furthermore, the air supply control valve group is composed of a hand valve 17, a flow regulating valve 29 and a flow meter 30 which are sequentially arranged from top to bottom, the hand valve is used for overhauling the pipeline, the flow regulating valve controls the air passing rate in the pipeline by regulating the opening degree of the valve body, so as to regulate the air spraying rate of the spraying box, the flow meter is used for metering the air passing rate in the pipeline and feeding back the air passing rate to the control system, and the control system regulates the opening degree of the valve body of the flow regulating valve, so that the target air passing rate control is realized. During operation, cooling air is equalized by the primary gas collecting pipe 11 and then supplied to 3 cooling areas 16 respectively, whether each cooling area 16 is put into use or not is controlled by the air supply on-off valve 12, the cooling air flows to the cooling component cooling steel plate 2 through the secondary gas collecting pipe 13 and the air supply branch pipeline 15, and the air volume and the air pressure output by the cooling component are controlled in a closed loop mode by the air supply control valve group 14 installed on the air supply branch pipeline 15.
The mist assembly 4 includes a main water supply line 18, a main air supply line 19, and a plurality of mist generators 24. The foremost end of the main water supply pipeline is provided with a main water supply control valve group which is used for controlling the flow and the pressure of cooling water; the foremost end of total air supply line sets up a total air feed valve unit, air feed valve unit is used for controlling compressed air's flow and pressure. The main water supply pipeline 18 and the main air supply pipeline 19 are respectively connected with a plurality of steam fog generators 24 through branch pipelines, the steam fog generators 24 are arranged in parallel, the steam fog generators 24 are communicated with the cooling assembly through branch air supply pipelines 15, a water supply on-off valve is arranged between the water supply pipeline and the steam fog generators, and an air supply on-off valve is arranged between the air supply pipeline and the steam fog generators. The water supply control valve group is used for controlling water supply flow and pressure in a main water supply pipeline, the water supply control valve group comprises a hand valve, a flow regulating valve and a flowmeter, the flow regulating valve regulates the opening degree of a valve body and regulates the water passing amount, the flowmeter is used for metering the water passing amount, the flowmeter is combined with the flowmeter to feed back flow, the flow regulating valve is controlled by a control system, and the target water passing amount requirement is met. The air supply control valve group also comprises a hand valve, a flow regulating valve and a flowmeter, has the similar action as the water supply control valve group, and only controls compressed air instead of water.
When in work, the flow is 20-60 m 3 Cooling water with the pressure of 0.2-0.4 MPa is delivered to each vapor generator 24 through a main water supply pipeline 18, the flow and the pressure of the cooling water supplied by each vapor generator 24 are controlled in a closed loop mode by a water supply control valve group 20 installed on the main water supply pipeline 18, the on-off of the cooling water of each vapor generator 24 is controlled by a water supply on-off valve 22 installed on the water supply pipeline, and the flow is 10-20 m 3 Compressed air with pressure of 0.4-0.6 MPa is delivered to the aerosol generators 24 through the air supply pipeline, the flow and pressure of the compressed air supplied by each aerosol generator 24 are controlled in a closed loop mode through an air supply control valve group 21 arranged on the main air supply pipeline 19, and the on-off of the compressed air of each aerosol generator 24 is controlled through an air supply on-off valve 23 arranged on the air supply pipeline 19.
Each vapor generator needs to be filled with cooling water and compressed air when working, the water supply on-off valve is used for controlling the on-off of the cooling water in each vapor generator, and the air supply on-off valve is used for controlling the on-off of the compressed air in each vapor generator.
Vapour fog generator, its structure is shown in fig. 2, including multiunit atomizing nozzle 25, atomizer chamber 26 and drain valve 28, atomizer chamber 26 establishes to the cylinder size, and multiunit atomizing nozzle 25 is the cylinder outer wall of cyclic annular embedding atomizer chamber 26, and each atomizing nozzle connects air supply line and water supply pipe respectively, and the centre of atomizer chamber 26 is provided with observation window 27, and one side that atomizer chamber 26 kept away from atomizer nozzle 26 is located to drain valve 28. The aerosol generator 24 is installed on each sub air supply pipeline 15. During operation, after being atomized by the atomizing nozzle 25, compressed air and cooling water with certain flow and pressure are uniformly mixed with cooling air in the air supply branch pipelines 15 in the atomizing chamber 26, the cooling air containing fog drops is sent to the cooling spray boxes 17 by the air supply branch pipelines 15 to cool the steel plate 2, the atomizing state is observed by the observation window 27 arranged on the outer wall of the cylinder of the atomizing chamber 26, the atomizing state is adjusted by adjusting the flow rate and the pressure ratio of the cooling water and the compressed air of the atomizing nozzle 25, and the atomizing chamber 26 realizes water drainage by periodically opening the drain valve 28.
As shown in fig. 1, the fixing assembly includes a fixing frame 5 including a moving frame 31, a motorized lift system 32, and a crash panel 33. Electric lift system 32 locates the top of fixed frame 5, and moving frame 31 installs in fixed frame 5, and electric lift system 32 connects and drives moving frame 31 and reciprocate, and cooling module is installed to moving frame 31's below, and anticollision backplate 33 is fixed to be located moving frame 31's below for the protection cooling module. A plurality of anti-collision guard plates 33 are arranged at intervals; the impact guard 33 is disposed opposite to the roller 9 in the vertical direction. That is to say that many stands of fixed frame accessible are fixed subaerial, the roll table rack-mount is subaerial at fixed frame stand inboard, cooling spray box and many rollers under the roll table rack side-mounting multiunit, interval arrangement (the roll table frame is arranged at the steel sheet downside), fixed frame side-mounting electric lift system, install the removal frame in fixed frame through electronic lead screw connection, cooling spray box and anticollision backplate on the installation of removal frame downside, interval arrangement (remove the frame and go up the cooling spray box, the anticollision backplate is arranged at the steel sheet upside), the steel sheet is born the weight of the transportation by many rollers. When the thickness of a steel plate needing to be cooled changes, the electric lifting system is started to drive the movable rack to move vertically, the upper cooling spray box for cooling the steel plate is arranged on the lower side of the movable rack, the distance between the upper cooling spray box and the upper surface of the steel plate is adjusted through the electric lifting system, the spraying distance of the upper surface and the lower surface of the steel plate is consistent, and the symmetrical cooling requirements of the upper surface and the lower surface of the steel plate are met.
The cooling assembly comprises a plurality of upper cooling spray boxes 34 and lower cooling spray boxes 35 which are vertically and symmetrically arranged along the upper surface and the lower surface of the steel plate 2, the upper cooling spray boxes 34 are arranged below the movable rack 31 at intervals, and the lower cooling spray boxes 35 are arranged above the roller rack 6 at intervals. The upper cooling spray boxes 34 and the lower cooling spray boxes 35 which are symmetrically arranged form a group of cooling units; the multiunit cooling unit is along steel sheet advancing direction parallel arrangement and divide into strong cold district, last cooling space, 3 cooling spaces in weak cold district, and all last cooling spray boxes and all lower cooling spray boxes all are connected and realize independent air feed control by 1 set of air feed pipeline, air feed control valves alone in every cooling space. Further, the upper cooling spray box and the lower cooling spray box have equal distance from the upper surface and the lower surface of the steel plate 2. Up-down vertical symmetrical arrangement 1 set cooling spray box34 and 1 set of lower cooling spray box 35 constitute 1 group of cooling unit 36, 8 ~ 16 cooling unit 36 of group are along 2 advancing direction parallel arrangement of steel sheet and divide into strong cold district 37, last cooling district 38, 3 cooling districts 16 altogether in weak cold district 39, all upper cooling spray boxes and all lower cooling spray boxes all are independently by 1 set of branch air supply pipeline 15 in every cooling district 16, air feed control valves 14 realizes independent air feed control, strong cold district 37 is located cooling device 1 entrance side, contain 4 groups of cooling unit 36, the cooling mode is mainly by large-traffic strong wind cooling (if total air jet can be 5000 ~ 8000m 3 /h), the steam-fog cooling is auxiliary, the continuous cooling area 38 is positioned in the middle of the cooling device 1 and comprises 4 groups of cooling units 36, the cooling mode mainly adopts the steam-fog cooling and the strong wind cooling is auxiliary (if the total wind blowing amount can be 2000-3000 m) 3 H), the weak cold area 39 is positioned at the outlet side of the cooling device 1 and comprises 4 groups of cooling units 36, and the cooling mode mainly adopts low-flow strong wind cooling (for example, the total wind blowing quantity can be 3000-4000 m) 3 And/h) and steam fog cooling, and the steel plate 2 is subjected to flexibility and cooling according to a process path by controlling the cooling air flow and pressure, the cooling water flow and pressure and the compressed air flow and pressure of each group of cooling units 36.
The upper cooling spray box and the lower cooling spray box are structurally shown in fig. 3, the lower cooling spray box 35 is made of austenitic stainless steel and comprises a flow equalizing cavity 41 and a plurality of cooling nozzles 42, the cooling nozzles 42 are arranged in 3 rows, the cooling nozzles 42 between two adjacent rows are installed on an upper panel 44 of the flow equalizing cavity 41 in a crossed mode, and a plurality of air inlets 40 are formed in the lower side of the flow equalizing cavity 41. The nozzle of the cooling nozzle 42 is set to be an oval nozzle 43, the oval nozzle can effectively increase the spraying area, and the uniform cooling of the surface of the steel plate is realized. The major axis of the oval nozzle 43 of the cooling nozzle 42 is less than 15-25 mm long, and the minor axis is 7-15 mm long.
The material and structure of the upper cooling spray box 34 are the same as those of the lower cooling spray box 35. When the cooling device works, the air spraying amount of a single cooling nozzle 42 is 3-7 m 3 H is used as the reference value. And the distances between the upper cooling spray box and the lower cooling spray box and the upper surface and the lower surface of the steel plate 2 are equal by starting the electric lifting system, and the vertical distance between the cooling nozzle 42 of the upper cooling spray box and the upper peak of the roller is adjusted to be +5mm of the maximum thickness of the cooled steel plate.
Taking the requirement of preparing a steel plate with the thickness of 25mm and the width of 2000mm, tempering at the high temperature of 550 ℃, and setting the maximum thickness of the steel plate cooled by the device to be 40mm as an example, the specific working process of the flexible cooling device after the steel plate is tempered is described as follows by combining the attached drawings 1-3:
before the steel plate 2 is cooled, the fan 10 of the cooling device 1, the air supply on-off valve of the strong cooling area 37, the air supply on-off valve of the continuous cooling area 38 and the air supply on-off valve of the weak cooling area 39 are opened; cooling air enters an upper cooling spray box 34 and a lower cooling spray box 35 air inlet 40 through a primary air collecting pipe 11, an air supply opening and closing valve 12, a secondary air collecting pipe 13 and a sub air supply pipeline 15, is equalized by a flow equalizing cavity 41 of each cooling spray box, is jetted by an oval nozzle 43 of a cooling nozzle 42 arranged on an upper panel 44 of the flow equalizing cavity 41 in a jet mode, and the total air injection quantity of a forced cooling area 37 is controlled to be 7500m through an air supply control valve group 14 arranged on each sub air supply pipeline 15 3 The air injection pressure is 15 kPa; total air blast volume 2500m of the continuous cooling zone 38 3 The air injection pressure is 12 kPa; total air injection volume of the weak cold area 39 is 3500m 3 The air injection pressure is 12 kPa; opening all water supply on-off valves 22 of the steam spray assembly 4, supplying water on the main water supply pipeline 18, and controlling the total water supply amount to 20m by the control valve set 20 3 H, the water supply pressure is 0.5 MPa; all the air supply on-off valves 23 of the steam fog assembly 4 are opened, and the air supply control valve group 21 arranged on the air supply pipeline 19 controls the total compressed air amount to be 50m 3 The water supply pressure is 0.4MPa, cooling water and compressed air enter an atomizing nozzle 25 of an aerosol generator 24 through a water supply pipeline and an air supply pipeline and are sprayed into an atomizing chamber 26, the atomizing state of the droplets is observed in an observation window 27, the atomizing nozzle 25 is adjusted to form uniform droplets, the droplets enter each cooling spraying box along with cooling air in a branch air supply pipeline 15 and are sprayed out through an oval nozzle 43 of a cooling nozzle 42, and the amount of the droplets mixed in a strong cooling area 37, a continuous cooling area 38 and a weak cooling area 39 is adjusted through adjusting the atomizing nozzle 25. The electric lifting system 32 on the upper side of the fixed frame 5 drives the movable frame 31 and the upper cooling spray box 34 and the anti-collision protection plate 33 which are arranged on the lower side of the movable frame 31 to move up and down, and the vertical distance between the cooling nozzle of the upper cooling spray box 34 and the top point of the roller 9 arranged on the roller bed frame 6 is adjusted to 45mm, so that the cooling nozzles of the upper cooling spray box and the lower cooling spray box are away from the upper surface of the steel plate and the upper surface of the steel plateThe distance between the lower surfaces is equal, and the opening roller 9 and the run-out table 8 rotate forward at a linear speed of 0.2m/s, so that the cooling device 1 is ready. The steel plate 2 goes out of the roller hearth type tempering furnace 7, is transported forward by the roller 9, pass the cooling unit 36 of 12 groups of three cooling areas 16 of strong cold area 37, lasting cooling area 38, weak cold area 39 of the cooling module sequentially, the direction is invariable, speed is invariable in the steel plate 2 transportation process, after the tail of the steel plate 2 makes the cooling device 1 to carry-out table 8 out of, the blower 10 of the air supply assembly 3 of the cooling device 1 stops running, the air supply open and close valve 12 of each branch air supply pipeline 15 is closed, the water supply open and close valve 22 on the water supply pipeline is closed, the air supply open and close valve 23 on the air supply pipeline is closed, the roller 9 and carry-out table 8 stop running. And finishing cooling the flexible cooling device after tempering the steel plate.
Use the utility model provides a device produces following effect: firstly, after the steel plate is cooled by a flexible cooling device, the final cooling temperature is less than or equal to 100 ℃, and the final cooling temperature and the cooling speed in the cooling process can be accurately controlled according to the regulation and control requirements of the structure performance of the steel plate, so that the regulation and control requirements of a multiphase structure are met; the temperature of the steel plate can be quickly reduced by adding the flexible cooling device after tempering, the air cooling time of the steel plate after tempering of the traditional tempering furnace is reduced, and the production efficiency is improved; and thirdly, the flexible cooling device symmetrically cools the upper surface and the lower surface of the steel plate after tempering, so that the shape of the tempered steel plate is flat and straight, and the heat treatment yield is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art can change or modify the technical content of the above disclosure into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. The device for flexibly cooling the tempered steel plate is characterized by comprising an air supply assembly, a steam fog assembly, a cooling assembly, a fixing assembly and a roller bed rack, wherein the air supply assembly is communicated with the cooling assembly and used for providing cooling air; the steam fog assembly is arranged below the air supply assembly, is connected with the cooling assembly and is arranged between the cooling assembly and the air supply assembly, and is used for providing steam fog; the cooling assemblies are arranged below the fixing assemblies and above the roller bed rack and are used for cooling the steel plate in a segmented manner; the fixing assembly is arranged above the roller way rack, a cooling assembly and a plurality of rollers are arranged above the roller way rack, and the rollers are used for conveying steel plates; when the cooling device works, a steel plate to be cooled is arranged between the fixing assembly and the roller bed frame and is arranged on the roller.
2. The apparatus of claim 1, wherein the air supply assembly comprises a fan, a primary manifold, an air supply on-off valve, a secondary manifold, an air supply control valve set, and a sub-air supply line; the fan is connected with a primary gas collecting pipe, the primary gas collecting pipe is connected with three or more secondary gas collecting pipes, an air supply opening and closing valve is arranged between the primary gas collecting pipe and the secondary gas collecting pipes, the secondary gas collecting pipes are connected with the cooling assembly through a sub-air supply pipeline, and the air supply control valve group is arranged between the secondary gas collecting pipes and the sub-air supply pipeline; the air supply control valve group comprises a hand valve, a flow regulating valve and a flowmeter which are sequentially arranged from top to bottom.
3. The apparatus of claim 2, wherein the vapor-fog assembly comprises a main water supply line, a main air supply line, and a plurality of vapor-fog generators, each vapor-fog generator communicating the main water supply line with the main air supply line, the plurality of vapor-fog generators being arranged in parallel; a water supply opening and closing valve is respectively arranged between the main water supply pipeline and each vapor generator; an air supply on-off valve is respectively arranged between the main air supply pipeline and each vapor generator; the vapor generator is communicated with the cooling assembly through a branch air supply pipeline.
4. The apparatus as claimed in claim 3, wherein the foremost end of the main water supply line is provided with a main water supply control valve group for controlling the flow rate and pressure of the cooling water;
the foremost end of total air supply line sets up total air feed valve unit, air feed valve unit is used for controlling compressed air's flow and pressure.
5. The device as claimed in claim 3, wherein the aerosol generator comprises a plurality of groups of atomizing nozzles, an atomizing chamber and a water discharge valve, the atomizing chamber is in a cylindrical shape, the plurality of groups of atomizing nozzles are annularly embedded in the outer wall of the cylinder of the atomizing chamber, each atomizing nozzle is respectively connected with a gas supply pipeline and a water supply pipeline, an observation window is arranged in the middle of the atomizing chamber, and the water discharge valve is arranged on one side of the atomizing chamber, which is far away from the atomizing nozzles.
6. The device according to claim 3, wherein the fixed assembly comprises a fixed frame, a movable frame, a motorized lift system and a plurality of anti-collision guard plates, the motorized lift system is arranged above the fixed frame, the movable frame is arranged in the fixed frame, the motorized lift system is connected with and drives the movable frame to move up and down, a cooling assembly is arranged below the movable frame, and the plurality of anti-collision guard plates are fixedly arranged below the movable frame and used for protecting the cooling assembly.
7. The apparatus of claim 6, wherein a plurality of said crash panels are spaced apart; a plurality of the rollers are arranged at intervals; the anti-collision protection plate and the roller are arranged oppositely in the vertical direction.
8. The apparatus of claim 6, wherein the cooling assembly comprises a plurality of upper cooling spray boxes and lower cooling spray boxes which are vertically and symmetrically arranged along the upper surface and the lower surface of the steel plate, the plurality of upper cooling spray boxes are arranged below the movable rack at intervals, the plurality of lower cooling spray boxes are arranged above the roller rack at intervals, the upper cooling spray boxes and the lower cooling spray boxes which are symmetrically arranged form a group of cooling units, the plurality of groups of cooling units are arranged in parallel along the traveling direction of the steel plate and are divided into 3 cooling zones including a strong cooling zone, a continuous cooling zone and a weak cooling zone, and all the upper cooling spray boxes and all the lower cooling spray boxes in each cooling zone are independently connected by 1 set of air supply pipeline and air supply control valve group to realize independent air supply control.
9. The apparatus of claim 8, wherein the forced cooling zone comprises 3-6 groups of cooling units located at the inlet side of the cooling apparatus; the continuous cooling area comprises 3-6 groups of cooling units and is positioned in the middle of the cooling device; the weak cold area comprises 2-4 groups of cooling units and is located on the outlet side of the cooling device.
10. The device as claimed in claim 8, wherein the lower cooling spray box comprises a flow equalizing chamber and a plurality of cooling nozzles, the plurality of nozzles are arranged on the upper panel of the flow equalizing chamber for cooling, and the nozzles of the cooling nozzles are formed in an oval shape with a long axis length of 15-25 mm and a short axis length of 7-15 mm; the cooling nozzles are arranged in three rows, and the cooling nozzles in two adjacent rows are arranged in a crossed manner; air inlets for connecting the sub air supply pipelines are arranged below the flow equalizing cavity, and 3-6 air inlets are arranged;
the upper cooling spray box and the lower cooling spray box are symmetrically arranged in structure;
when the cooling spraying box works, the distances between the cooling nozzles of the upper cooling spraying box and the lower cooling spraying box to the upper surface and the lower surface of the steel plate to be treated are equal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220394664.0U CN217377969U (en) | 2022-02-25 | 2022-02-25 | Device for flexibly cooling tempered steel plate |
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| CN202220394664.0U CN217377969U (en) | 2022-02-25 | 2022-02-25 | Device for flexibly cooling tempered steel plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592112A (en) * | 2022-02-25 | 2022-06-07 | 东北大学 | Flexible cooling device for tempered steel plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592112A (en) * | 2022-02-25 | 2022-06-07 | 东北大学 | Flexible cooling device for tempered steel plate |
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