Novel online multifunctional cooling device for excellent and special steel bars

Abstract

The utility model belongs to the field of mechanical equipment, and relates to a novel online multifunctional cooling device for excellent and special steel bars, which comprises a cooling tank and feeding, taking and receiving mechanisms on two sides of the cooling tank. A stepping transverse moving device is arranged above the cooling groove and drives the high-temperature rolled piece to move in a stepping mode. The feeding mechanism comprises an input roller way and a lifting and translation hydraulic cylinder, and rolled pieces are lifted and transferred to a cooling tank. The material taking mechanism comprises a translation hydraulic cylinder, and the cooled rolled pieces are taken out and conveyed to the material receiving mechanism and then conveyed to the next procedure through the output roller way. The device solves the problems of too deep surface quenching layer, martensite structure appearance, large temperature difference and the like in the traditional process, ensures the temperature uniformity (the temperature difference is less than or equal to 50 DEG C), reduces surface scratches and pits, is adaptive to a multi-steel-grade cooling process, and automatically adjusts the cooling time and speed. The method is suitable for production and application of high-quality special steel such as bearing steel, non-quenched and tempered steel, spring steel, stainless steel, tool steel and high-temperature alloy steel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of mechanical equipment relates to the special steel bar online novel multifunctional cooling device. BACKGROUND

[0002] In the field of steel rolling in the metallurgical industry, special steel is the abbreviation of high-quality steel and special-purpose steel, which covers steel varieties with high technical content, high quality, high added value and personalized needs of users, mainly including carbon structural steel, alloy structural steel, tool steel, spring steel, bearing steel, stainless steel, high-temperature alloy steel, etc. Special steel is an important symbol of whether a country can become a steel power. With the acceleration of the high-end, intelligent and green pace of China's manufacturing industry, it provides a good platform and sufficient space for the development of domestic special steel. Especially in the machinery, automobile, electromechanical and shipbuilding industries, the demand for special steel is strong, which becomes the direct driving force to support the special steel market.

[0003] Traditional bar cooling after rolling is to realize the heat treatment process, that is, the steel bar with a final rolling temperature of 900-1100 DEG C is cooled directly by a cooler to perform surface quenching, so that the surface temperature is rapidly reduced to 200-300 DEG C, and then the remaining heat is transmitted from the core of the rolled piece in the air, so that the temperature of the steel reaches the self-tempering temperature of 550-650 DEG C, so as to improve the strength, plasticity and toughness of the steel, and the steel has good comprehensive performance.

[0004] Traditional bar controlled cooling is mainly applied in the production of threaded steel, and the cooler is generally long, with a single group of nearly 2000 m or longer, and is usually arranged continuously. The temperature recovery time after cooling is short, the surface of the bar is easily chilled, martensite layer appears, the martensite is hard and brittle, the strength is improved but the toughness is decreased. For special steel bar production, it is necessary to avoid the appearance of surface quenching martensite organization and reduce the temperature difference between the surface and the core of the bar. Therefore, the controlled cooling strength and intermittent cooling, temperature recovery (cooling-recovery-recooling-recovery) mode is more effective for the production of special steel bar.

[0005] At present, in the field of rolling in metallurgical industry, in order to meet the requirements of different organizations and properties of different steel bars, a large amount of research and multiple design optimization of the structure of the step-by-step cooling bed are carried out, and have been widely applied in the industry. However, for the production of some die steel, stainless steel, high-temperature alloy steel and other steel bar products, quenching treatment is needed after hot rolling to improve the comprehensive performance of the material. For example, austenitic stainless steel and some high-temperature alloy steel need to be solid solution quenched to dissolve the solid solution elements in the matrix, so that the grain size becomes small and uniform, thereby improving the hardness and strength of the rolled piece, and improving the plasticity and toughness; some high-carbon steel, alloy steel, tool steel and other steels need to be quenched to improve the lattice structure of the metal, reduce the lattice defects and distortion, and form more high-hardness phase, thereby improving the hardness, strength and wear resistance of the rolled piece.

[0006] At present, the quenching treatment of the special steel bar in the industry still adopts offline reheating, and is transferred into the cooling tank by a crane or a forklift for treatment, which wastes energy and has low production efficiency. In addition, the industry has higher and higher requirements for the quality of the directly hot-rolled special steel bar products, and the product surface quality needs to avoid a large number of scratches and pits as much as possible, and the internal quality needs to reduce the core-surface temperature difference in the cooling process to realize the uniformity of cooling and the uniformity of organization and performance. Therefore, on the basis of the existing equipment design, a new type of online quenching and cooling multifunctional device is developed, which adopts a step-by-step action mode, a multi-directional spraying cooling mode, a cooling liquid replacement mode from the bottom to the top and an online automatic control mode, which is extremely beneficial to the production of special steel bars. Practical new type

[0007] Therefore, the purpose of the present application is to provide a new type of online multifunctional cooling device for special steel bars, which solves the problem of deep quenching layer on the surface in the traditional controlled rolling and controlled cooling process.

[0008] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a new type of online multifunctional cooling device for special steel bars, comprising a cooling tank, an upper feeding mechanism, a material taking mechanism and a material receiving mechanism arranged on both sides of the cooling tank, a step-by-step horizontal moving device arranged above the cooling tank, used for moving the high-temperature rolled piece from the inlet to the outlet of the cooling tank; the upper feeding mechanism comprises an input roller, a lifting hydraulic cylinder and a horizontal moving & discharging hydraulic cylinder, the high-temperature rolled piece is placed on the input roller, then lifted to a high position by the lifting hydraulic cylinder, and then moved to above the inlet of the cooling tank by the horizontal moving & discharging hydraulic cylinder, and discharged into the cooling tank; the material taking mechanism comprises a horizontal moving & discharging hydraulic cylinder, used for taking out the cooled rolled piece from the outlet of the cooling tank, and transferring it to the material receiving mechanism, and the material receiving mechanism is used for receiving the rolled piece from the material taking mechanism, and conveying it to the next process through an output roller.

[0009] Optionally, the cooling tank comprises a cooling tank working chamber and a waste cooling liquid recovery chamber for containing cooling liquid and receiving the high-temperature rolled piece from the feeding mechanism.

[0010] Optionally, the cooling tank is an open upward container with sealing and high-strength structure, and the replacement and liquid level of the internal cooling liquid are controlled by the cooling liquid regulating valve and the thermometer and liquid level gauge installed on the cooling liquid inlet pipe and the cooling liquid return pipe.

[0011] Optionally, the lifting hydraulic cylinder and the translation & discharging hydraulic cylinder of the feeding mechanism work cooperatively to realize the lifting, translation and discharging actions of the high-temperature rolled piece.

[0012] Optionally, the step translation device comprises a step toothed plate, a toothed plate base, a step movable toothed plate, a movable toothed plate girder and a fixed seat, the step translation device is installed in the cooling tank, and the step movable toothed plate is used to move the high-temperature rolled piece from the entrance to the exit of the cooling tank at a set pace under the support of the toothed plate base and the movable toothed plate girder.

[0013] Optionally, the translation & discharging hydraulic cylinder of the taking mechanism drives the taking mechanism to move between the exit of the cooling tank and the receiving mechanism, and takes out the cooled rolled piece from the cooling tank and places it on the receiving mechanism.

[0014] Optionally, it further comprises a cooling liquid spraying system composed of a cooling liquid inlet pipe, a cooling liquid return pipe, a cooling liquid nozzle and a flange bolt, the cooling liquid spraying system is installed below the cooling tank, and is used to spray cooling liquid into the cooling tank to control the temperature of the cooling liquid in the cooling tank and take away the heat generated when the high-temperature rolled piece is cooled.

[0015] Optionally, the cooling liquid nozzles of the cooling liquid spraying system are uniformly distributed on each branch pipe in a large amount, the pressure of the sprayed cooling liquid is controlled by automatically adjusting the amount of the supplied cooling liquid, and the cooling liquid in the cooling tank is replenished and replaced from bottom to top.

[0016] Optionally, the cooling liquid spraying system is further provided with a cooling liquid control system composed of a cooling liquid pipe regulating valve, a cooling liquid flowmeter, a thermometer and a liquid level gauge, the cooling liquid control system monitors the temperature and liquid level of the cooling liquid in real time through the thermometer and the liquid level gauge, and automatically adjusts the opening degree of the cooling liquid regulating valve according to the monitoring result, so as to realize the accurate control of the temperature, flow and liquid level of the cooling liquid.

[0017] The utility model discloses a beneficial effect lies in: the utility model discloses online novel multifunctional cooling device of special steel bar, on the basis of satisfying the mechanical property of bar, the problem of the deeper quenching layer of surface layer in traditional controlled rolling and controlled cooling process is solved, and the surface layer quenching martensite organization appears effectively, realizes the organization type control, guarantees the homogeneity of surface layer and heart temperature better, and the temperature difference of surface layer and heart is less than or equal to 50 DEG C, solves the influence of existing equipment to the surface quality of special steel bar, can reduce the scratch, pit and other defects of bar surface in a large quantity, realizes the requirement of special steel multi-steel cooling process, and the cooling time, cooling speed and the like of the rolling piece in the cooling tank are automatically adjusted through the cooling liquid control system.

[0018] Other advantages, objects and features of the present application will be apparent from the following specification, and will be learned from the practice of the present application, which will be apparent to those skilled in the art upon examination of the following specification, or can be learned from the practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear, the preferred detailed description of the utility model will be combined with the drawings below, wherein:

[0020] Fig. 1 It is the schematic diagram of the cross section and the running direction of the rolling piece of the utility model;

[0021] Fig. 2 It is the side schematic view of the utility model;

[0022] Fig. 3 It is the side view and the spraying system schematic view of the utility model;

[0023] Fig. 4 It is the plan view of the utility model.

[0024] Figures: 1-high temperature rolling piece, 2-input roller, 3-feeding mechanism, 4-lifting hydraulic cylinder, 5-translation & discharging hydraulic cylinder, 6-cooling tank, 7-step transverse moving device, 8-step toothed plate, 9-toothed plate base, 10-step movable toothed plate, 11-movable toothed plate girder, 12-fixed seat, 13-toothed plate lifting hydraulic cylinder, 14-removing mechanism, 15-translation & removing hydraulic cylinder, 16-receiving mechanism, 17-output roller, 18-cooling liquid control system, 19-cooling liquid inlet pipe, 20-cooling liquid return pipe, 21-cooling liquid regulating valve, 22-cooling liquid flow meter, 23-thermometer, 24-liquid level meter, 25-cooling liquid spraying system, 26-cooling liquid nozzle, 27-cooling tank working chamber, 28-waste cooling liquid recovery chamber. DETAILED DESCRIPTION

[0025] The above and other advantages and effects of the present application can be easily understood from the description of the embodiments of the present application, and can be easily achieved by the skilled in the art. The present application can be carried out or applied by different embodiments, and the details in the description can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and the features in the following embodiments and examples can be combined with each other without conflict.

[0026] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and the features in the following embodiments and examples can be combined with each other without conflict.

[0027] In the drawings of the embodiments of the present application, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only for illustrative purposes, and cannot be understood as a limitation of the present application, and for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0028] Please refer to Figs. 1-4The utility model provides an online new type multifunctional cooling device for high-quality steel bar, which integrates mechanical transmission and fluid control principles, mainly comprises a feeding mechanism 3, a cooling tank 6, a stepping horizontal moving device 7, a material taking mechanism 14, a material receiving mechanism 16, a cooling liquid control system 18 and a cooling liquid spraying system 25, and the mechanical structure, connection relationship and operation method of each component are as follows.

[0029] The feeding mechanism 3 is mainly composed of a lifting hydraulic cylinder 4 and a horizontal moving and discharging hydraulic cylinder 5 in structure.

[0030] The cooling tank 6 is designed as a high-strength and sealed container, which is divided into a cooling tank working chamber 27 and a waste cooling liquid recovery chamber 28.

[0031] The stepping horizontal moving device 7 is composed of a stepping toothed plate 8, a toothed plate base 9, a stepping movable toothed plate 10, a movable toothed plate girder 11 and a fixed seat 12.

[0032] The material taking mechanism 14 is driven by the horizontal moving and taking hydraulic cylinder 15.

[0033] The material receiving mechanism 16 is designed to receive the rolled piece from the material taking mechanism 14 and continuously convey the rolled piece to the subsequent process through the output roller 17, so that the continuous treatment of the rolled piece is realized.

[0034] The cooling liquid control system 18 integrates a cooling liquid pipe regulating valve 21, a cooling liquid flowmeter 22, a thermometer 23 and a liquid level meter 24.

[0035] Cooling liquid spraying system 25: by the cooling liquid inlet pipe 19, back cooling liquid pipe 20, cooling liquid nozzle 26 etc., is installed in the cooling tank 6 bottom, through the cooling liquid nozzle 26 to the cooling tank even spray cooling liquid, realize the recycling and temperature control of cooling liquid, promote the uniform cooling of the rolled piece at the same time.

[0036] In the embodiment, the components of the device are connected by precise mechanical connection and fluid pipe connection, ensuring the overall stability and operation reliability of the device. At the same time, the material and structure of each component are optimized according to the actual needs and use environment to meet the requirements of strength, corrosion resistance and service life of the device.

[0037] The utility model discloses in using, including the following steps:

[0038] Step 1, the feeding mechanism 3 is lifted to the high position to the high-temperature rolled piece 1 that input roller way 2 is transported to position, then is fast translated to the cooling tank 6 entrance above, again put the material to the first tooth slot of the step-by-step toothed plate 8 in the cooling tank;

[0039] Step 2, the step-by-step rhythm of the step-by-step movable toothed plate 10 in the cooling tank matches the feeding rhythm of the feeding mechanism 3, and the high-temperature rolled piece 1 is stepped from the first tooth slot of the step-by-step toothed plate 8 to the last tooth slot of the step-by-step toothed plate 8 according to the rhythm;When executing the quenching process and slow-cooling material conveying, the step-by-step rhythm of the step-by-step movable toothed plate 10 is accelerated according to the process requirements, which is used to control the cooling time or step-by-step time of the high-temperature rolled piece 1 in the cooling tank 6, so that the bar product meets the process requirements of solid solution, quenching, slow cooling and natural cooling;

[0040] Step 3, after reading the feedback data of the thermometer 23 and the liquid level meter 24 arranged on the cooling tank 6, the cooling liquid flow meter 22 is automatically interlocked, the cooling liquid pipe regulating valve 21 arranged on the cooling liquid inlet pipe 19 and the back cooling liquid pipe 20 is automatically adjusted through the re-feedback of the flow meter data, so that the temperature, flow and liquid level of the cooling liquid are automatically adjusted, which is used to meet the process requirements of the bar product;

[0041] Step 4: the rolled piece in the last tooth slot of the step-by-step toothed plate 8 is taken and conveyed to the receiving mechanism 16 by the taking mechanism 14, and is conveyed to the next process through the output roller way 17.

[0042] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, which should be covered in the scope of the claims of the utility model.

Claims

1. A novel multi-functional online cooling device for special steel bars, characterized in that: The cooling tank is provided with an upper feeding mechanism, a taking mechanism and a receiving mechanism on both sides of the cooling tank, and a step transverse moving device is arranged above the cooling tank to move the high-temperature rolled piece from the inlet to the outlet of the cooling tank. The feeding mechanism comprises an input roller, a lifting hydraulic cylinder and a translation & discharging hydraulic cylinder. The taking mechanism comprises a translation & discharging hydraulic cylinder to take the cooled rolled piece from the outlet of the cooling tank and transfer it to the receiving mechanism.

2. The online new multifunctional cooling device for high-quality steel bar according to claim 1, characterized in that: The receiving mechanism is used to receive the rolled piece from the taking mechanism and transfer it to the next process through an output roller.

3. The online new multifunctional cooling device for high-quality steel bar according to claim 2, characterized in that: The cooling tank comprises a cooling tank working chamber and a waste cooling liquid recovery chamber to accommodate the cooling liquid and receive the high-temperature rolled piece from the feeding mechanism.

4. The online new multifunctional cooling device for high-quality steel bar according to claim 1, characterized in that: The cooling tank is an open upward container with sealing and high strength structure, and the replacement and liquid level of the cooling liquid inside are controlled by the cooling liquid regulating valve, thermometer and liquid level gauge arranged on the inlet and return cooling liquid pipes.

5. The online new multifunctional cooling device for high-quality steel bar according to claim 1, characterized in that: The lifting hydraulic cylinder and the translation & discharging hydraulic cylinder of the feeding mechanism work together to realize the lifting, translation and discharging of the high-temperature rolled piece.

6. The online new multifunctional cooling device for high-quality steel bar according to claim 1, characterized in that: The step transverse moving device comprises a step toothed plate, a toothed plate base, a step movable toothed plate, a movable toothed plate girder and a fixed base.

7. The online new multifunctional cooling device for high-quality steel bar according to claim 1, characterized in that: The step movable toothed plate is supported by the toothed plate base and the movable toothed plate girder to move the high-temperature rolled piece from the inlet to the outlet of the cooling tank according to the set rhythm.

8. The online new multifunctional cooling device for high-quality steel bar according to claim 7, characterized in that: The translation & discharging hydraulic cylinder of the taking mechanism drives the taking mechanism to move between the outlet of the cooling tank and the receiving mechanism, and takes the cooled rolled piece from the cooling tank and places it on the receiving mechanism.

9. The online new multifunctional cooling device for high-quality steel bar according to claim 7, characterized in that: The cooling liquid spraying system comprises an inlet pipe, a return pipe, a cooling liquid nozzle and a flange bolt, and is arranged below the cooling tank to spray cooling liquid into the cooling tank to control the temperature of the cooling liquid and remove the heat generated during the cooling of the high-temperature rolled piece. The cooling liquid nozzles of the cooling liquid spraying system are uniformly distributed on each branch pipe, and the pressure of the sprayed cooling liquid is controlled by automatically adjusting the amount of cooling liquid to realize the replenishment and replacement of the cooling liquid in the cooling tank from bottom to top. The cooling liquid spraying system is also provided with a cooling liquid control system comprising a cooling liquid pipe regulating valve, a cooling liquid flow meter, a thermometer and a liquid level gauge. The cooling liquid control system monitors the temperature and liquid level of the cooling liquid in real time through the thermometer and liquid level gauge, and automatically adjusts the opening of the cooling liquid regulating valve according to the monitoring results to accurately control the temperature, flow and liquid level of the cooling liquid.

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