WO2021218357A1 - Système de refroidissement en ligne pour tube d'acier sans soudure laminé à chaud, et procédé d'agencement pour dispositif de refroidissement sur un système de refroidissement en ligne - Google Patents

Système de refroidissement en ligne pour tube d'acier sans soudure laminé à chaud, et procédé d'agencement pour dispositif de refroidissement sur un système de refroidissement en ligne Download PDF

Info

Publication number
WO2021218357A1
WO2021218357A1 PCT/CN2021/078670 CN2021078670W WO2021218357A1 WO 2021218357 A1 WO2021218357 A1 WO 2021218357A1 CN 2021078670 W CN2021078670 W CN 2021078670W WO 2021218357 A1 WO2021218357 A1 WO 2021218357A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
water
water spray
spray ring
cooling device
Prior art date
Application number
PCT/CN2021/078670
Other languages
English (en)
Chinese (zh)
Inventor
康健
袁国
李振垒
王黎筠
王国栋
Original Assignee
东北大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 东北大学 filed Critical 东北大学
Publication of WO2021218357A1 publication Critical patent/WO2021218357A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B2045/0227—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/06—Thermomechanical rolling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to the technical field of production of hot-rolled seamless steel pipes, in particular to an online cooling system for hot-rolled seamless steel pipes and a method for arranging cooling devices thereon.
  • the hot-rolled seamless steel pipe is between the sizing machine and the cooling bed, the on-line control of the microstructure and properties of the hot-rolled seamless steel pipe after rolling cannot be realized, so that the control of the type, shape, and size of the steel pipe cannot be achieved, and the steel pipe The overall performance is low.
  • the embodiments of the present invention provide an online cooling system for hot-rolled seamless steel pipes and a method for arranging cooling devices thereon, the main purpose of which is to improve the production efficiency and comprehensive performance of the hot-rolled seamless steel pipes.
  • the present invention mainly provides the following technical solutions:
  • an embodiment of the present invention provides an online cooling system for hot-rolled seamless steel pipes, including:
  • the sizing front roller table and the sizing rear roller table respectively located before and after the sizing machine, the cooling roller table and the cooling device between the cooling bed and the sizing machine;
  • the cooling device is arranged at the roller table before sizing, and its height can be adjusted with the height of the roller table before sizing; and/or, the cooling device is arranged at the roller table after sizing, And its height can be adjusted with the height of the roller table after sizing; and/or, the cooling device is arranged at the cooling roller table, and its height is adjusted by a hydraulic drive device;
  • the cooling device includes a plurality of cooling water spray rings arranged along the conveying direction of the roller table;
  • the outer surface of the cooling water spray ring is provided with a water inlet, and the water inlet is in communication with a branching and collecting pipe through a water supply pipeline and a regulating valve group.
  • the branching and collecting pipe is arranged in parallel with the cooling device, and the branching and collecting pipe is arranged in parallel with the cooling device.
  • the length of is greater than the length of the cooling device;
  • the inner wall of the cooling water spray ring is provided with a plurality of rows of evenly distributed cooling nozzles, and an annular partition that divides its inner cavity into a water inlet cavity and a water outlet cavity is provided in the cooling water spray ring.
  • the plate is provided with a through hole, the water inlet cavity and the water outlet cavity are communicated through the through hole, and the flow rate and pressure stability of the cooling water sprayed from the cooling nozzle of the cooling water spray ring are determined by the water inlet
  • the flow rate and the arrangement form and size of the through-flow holes on the annular baffle are controlled;
  • the cooling water spray ring includes an upper half water spray ring and a lower water spray ring that are opposite and independent of each other; or, the cooling water spray ring is an integrally connected integral annular water spray ring;
  • the annular baffle includes an upper half baffle and a lower half baffle that are opposed to each other, and the upper half baffle and the lower half baffle in turn divide the inner cavities of the upper half water spray ring and the lower half water spray ring respectively.
  • the upper and lower partitions are respectively provided with the through holes; or, the annular partition is an integral annular plate-shaped structure, and the integral annular The plate-like structure divides the inner cavity of the integral annular water spray ring into the water inlet cavity and the water outlet cavity, and the integral annular plate-like structure is provided with the flow hole;
  • the two ends of the upper half of the water spray ring are respectively provided with a first sewage outlet and a second sewage outlet communicating with the water inlet and outlet chambers, and the middle of the side of the lower half of the water spray ring is provided with the water inlet
  • the third sewage outlet and the fourth sewage outlet communicated with the cavity and the water outlet cavity; or, the middle position of the lower side of the integral annular water spray ring is provided with a fifth sewage outlet communicating with the water inlet cavity and the water outlet cavity respectively And the sixth sewage outlet;
  • first sewage outlet, the second sewage outlet, the third sewage outlet, the fourth sewage outlet, the fifth sewage outlet and the sixth sewage outlet are all buckled with a detachable cover; and/or, the The first sewage outlet, the second sewage outlet, the third sewage outlet, the fourth sewage outlet, the fifth sewage outlet and the sixth sewage outlet are all provided with sewage valves.
  • the inner diameter of the cooling water spray ring is larger than when the cooling device is arranged at the roller table after the sizing.
  • the number of the cooling water spray ring is 2-8, the inner diameter is 550-720mm, and the cooling nozzle is arranged along its annular inner wall surface.
  • the number of the cooling water spray ring is 3-10, the inner diameter is 450-660mm, and the cooling nozzles are evenly arranged along the annular inner wall surface.
  • the water pressure adjustment range of the 4-10 rows is 0.2 ⁇ 0.8Mpa; the flow rate range of the upper half water spray ring and the lower half water spray ring are both 80 ⁇ 220m 3 /h, the upper half water spray ring and the lower half
  • the water ratio of the water spray ring is 1.05 ⁇ 1.5; or, the flow rate of the integral annular water spray ring is 160 ⁇ 440m 3 /h, and the water inlet located at the upper end of the integral annular water spray ring and the integral annular water spray
  • the water inlet water ratio at the lower end of the ring is 1.05 ⁇ 1.5;
  • the number of the cooling water spray ring is 30-60, the inner diameter is 450-660mm, and the cooling nozzles are 2 evenly arranged along the annular inner wall.
  • the water pressure adjustment range is 0.2 ⁇ 0.8Mpa
  • the flow range of the upper half water spray ring and the lower half water spray ring are both 30 ⁇ 180m 3 /h
  • the upper half water spray ring and the lower half water spray The annular water ratio is 1.05 ⁇ 1.5; or, the flow rate of the integral annular water spray ring is 60 ⁇ 360m 3 /h, and the water inlet located at the upper end of the integral annular water spray ring and the lower end of the integral annular water spray ring
  • the water inlet water ratio is 1.05 ⁇ 1.5.
  • bypass pipelines are communicated with the branch water collection pipe, a pressure regulating valve is provided on the bypass pipeline, and the outlet of the bypass pipeline is used to communicate with the rolling groove.
  • the length of the water dividing and collecting pipe is at least 1.5 m greater than the length of the cooling device.
  • an embodiment of the present invention provides a method for arranging a cooling device on a hot-rolled seamless steel pipe on-line cooling system.
  • the hot-rolled seamless steel pipe on-line cooling system is the aforementioned hot-rolled seamless steel pipe on-line cooling system.
  • the method includes:
  • the cooling device is installed at the roll table before the sizing, the cooling device is installed at the roll table after the sizing, and the cooling device is installed at the roll table.
  • the present invention has at least the following beneficial effects:
  • the cooling device may be arranged at the roller table before sizing; and/or at the roller table after sizing; and/or at the cooling roller table to achieve
  • water cooling can be used to reduce the heating time of the steel pipe, thereby improving production efficiency
  • the steel pipe after the sizing Perform rapid cooling to retain the austenite in the work-hardened state, which is beneficial to the grain refinement of the ferrite transformation process, thereby ensuring the mechanical properties of the steel pipe
  • the cooling device is installed at the cooling roller table, the steel pipe can be rolled
  • the online control of the post-structure performance so as to realize the control of the type, shape, and size of the steel pipe, to achieve the effect of strengthening mechanism such as fine grain strengthening, dislocation strengthening, and phase transformation strengthening, thereby improving the comprehensive performance of the steel pipe.
  • This embodiment can According to the outline process requirements of the hot-rolled seamless steel pipe online
  • the cooling water spray ring of the cooling device can be adjusted in height through the sizing front roller table, the sizing roller table or the hydraulic driving device, so that the steel pipe can be cooled in the center to ensure the cooling effect.
  • the inner cavity of the cooling water spray ring of the cooling device in the embodiment of the present invention is divided into a water inlet cavity and a water outlet cavity by an annular partition, so that the water flow of the inlet cavity can flow into the water outlet cavity through the through holes on the annular partition. It is sprayed from the cooling nozzle to ensure the stability of the spraying flow of the cooling spray ring and improve the cooling effect.
  • the length of the splitter header is longer than the length of the cooling device, which prevents the unstable turbulence formed at the blind plates at both ends of the splitter header from affecting the pressure of the cooling device when water comes in, thereby ensuring that the pressure of the cooling device is more stable.
  • Figure 1 is a schematic structural diagram of an online cooling system for hot-rolled seamless steel pipes according to an embodiment of the present invention
  • Fig. 2 is a schematic structural diagram of a cooling water spray ring of the cooling device in Fig. 1;
  • Figure 3 is a schematic diagram of the structure of the lower half of the water spray ring in Figure 2;
  • Figure 4 is a schematic diagram of the structure of the upper half of the water spray ring in Figure 2;
  • Fig. 5 is a schematic structural diagram of another cooling water spray ring of the cooling device in Fig. 1 from a first perspective;
  • Fig. 6 is a schematic structural diagram of another cooling water spray ring of the cooling device in Fig. 1 from a second perspective.
  • an embodiment of the present invention provides an online cooling system for hot-rolled seamless steel pipes, which includes a sizing front roller table 2 and a sizing rear roller table 3 respectively located before and after the sizing machine 1.
  • the cooling roller table 5 and the cooling device 6 located between the cooling bed 4 and the sizing machine 1; the cooling device 6 is arranged at the roller table 2 before the sizing, and its height can be adjusted with the height of the roller table 2 before the sizing; and /Or, the cooling device 6 is arranged at the roller table 3 after the sizing, and its height can be adjusted with the height of the roller table 3 after the sizing; and/or, the cooling device 6 is arranged at the cooling roller table 5, and its height passes
  • the hydraulic driving device is adjusted; the cooling device 6 includes a plurality of cooling water spray rings 7 arranged along the conveying direction of the roller table; the outer surface of the cooling water spray ring 7 is provided with a water inlet 71, which passes through the water supply pipeline and the regulating valve group It
  • the annular partition 73 is provided with a through hole.
  • the flow rate and pressure stability of the cooling water sprayed from the cooling nozzle 72 of the cooling water spray ring 7 can be controlled by the flow rate of the water inlet 71 and the arrangement and size of the through holes on the annular partition 73.
  • FIG. 1 shows that the cooling device is arranged on the sizing front roller table 2, the sizing roller table 3, and the cooling roller table 6.
  • the cooling device 6 can be installed at the roller table 2 before sizing, at the roller table 3 after sizing, and at the cooling roller table 5 according to the process requirements of the outline. One or more of them can be combined, which is flexible and convenient to use.
  • the branch water collection pipe may be a pipe structure with blind plates at both ends, and it may communicate with the water inlet 71 of the cooling water spray ring 7 through a water supply pipe provided with a regulating valve group. Since the split header is prone to form unstable turbulence at the blind plates at both ends when water comes in, if this turbulence enters the cooling water spray ring 7, it will easily cause the pressure of the entire cooling device 6 to be unstable.
  • the length of the splitter header is set to be greater than the length of the cooling device 6, that is, when the two are arranged in parallel, the two ends of the splitter header extend beyond the two ends of the cooling device 6, so as to avoid the turbulence. Into the cooling water spray ring 7, thereby ensuring the pressure stability of the cooling device 6.
  • the length of the water distribution and collection pipe may be greater than the length of the cooling device 6 by at least 1.5 m.
  • the cooling water spray ring 7 is provided with an annular partition 73 that divides its inner cavity into a water inlet cavity and a water outlet cavity.
  • the annular partition 73 is provided with uniformly distributed through holes, water inlet and The water outlet cavity is connected through the through-flow holes.
  • Such a structure is arranged so that after entering the water cavity from the water inlet 71, it can be buffered by each through-flow hole before entering the water outlet cavity, and stably sprayed out through the cooling nozzle 72, further The water pressure stability of the cooling device 6 is ensured, thereby ensuring the cooling effect.
  • the cooling water spray ring 7 may include an upper half of the water spray ring 74 and a lower half of the water spray ring 75 that are opposite and independent of each other, and the annular partition 73 includes opposite upper halves.
  • the inner cavity of the upper water spray ring 74 and the lower water spray ring 75 are divided into the water inlet cavity and the water outlet cavity respectively by the upper and lower diaphragms.
  • the lower half of the partition plate are respectively provided with through holes;
  • the upper half of the water spray ring 74 is provided with a first sewage outlet 741 and a second sewage outlet 742 connected to its water inlet and outlet cavity on both end faces;
  • the middle of the side of the water spray ring 75 is provided with a third sewage outlet 751 and a fourth sewage outlet 752 communicating with the water inlet cavity and the water outlet cavity, respectively.
  • the first sewage outlet 741 and the second sewage outlet 742 are respectively arranged on the two end faces of the upper water spray ring 74, so that each sewage outlet is located at the lower end of the upper water spray ring 74 for cleaning the upper half.
  • the waste residue is flushed out when the water spray ring 74 is used.
  • the third sewage outlet 751 and the fourth sewage outlet 752 are respectively arranged in the middle of the side of the lower half of the water spray ring 75, so that each drain is located at the lower end of the lower half of the water spray ring 75, so as to clean the waste when the lower half of the water spray ring 75 Rush out.
  • the cooling water spray ring may be an integrally connected integral annular water spray ring 8.
  • the outer surface of the integral annular water spray ring 8 is provided with a water inlet 81, which The water inlet 81 is in communication with the branch water collection pipe through the water supply pipeline and the regulating valve group.
  • the inner wall of the integral annular water spray ring 8 is provided with a plurality of rows of uniformly distributed cooling nozzles 82, and the integral annular water spray ring 8 is provided with The inner cavity is divided into a water inlet cavity and an annular baffle of the water outlet cavity.
  • the ring baffle is an integral annular plate structure 83.
  • the integral annular plate structure 83 divides the inner cavity of the integral annular water spray ring 8 into a water inlet cavity and a water outlet cavity. Outlet cavity, the integral annular plate-shaped structure 83 is provided with a through hole; the middle position of the lower side of the integral annular water spray ring 8 can be provided with a fifth sewage outlet and a sixth sewage outlet communicating with the water inlet cavity and the water outlet cavity respectively .
  • the first sewage outlet 741, the second sewage outlet 742, the third sewage outlet 751, the fourth sewage outlet 752, the fifth sewage outlet 85 and the sixth sewage outlet 84 can all be buckled with detachable covers.
  • Body; and/or, the first sewage outlet 741, the second sewage outlet 742, the third sewage outlet 751, the fourth sewage outlet 752, the fifth sewage outlet 85 and the sixth sewage outlet 84 can all be provided with a sewage valve, thereby It is realized that when the cooling water spray ring 7 needs to be cleaned, the cover body and/or the drain valve can be opened for flushing, and after the cleaning is completed, the cover body and/or the drain valve can be closed. Specifically, the cover body can be threadedly connected with each sewage outlet.
  • the cooling device 6 can be installed at the roller table 2 before sizing; and/or at the roller table 3 after sizing; and/or, at all Said cooling roller table 5, so as to realize that when the cooling device 6 is installed at the roller table 2 before sizing, water cooling can be used to reduce the heating time of the steel pipe, thereby improving production efficiency; when the cooling device 6 is installed at the sizing roller table 2.
  • this embodiment can use one or more of the above methods to cool the hot-rolled seamless steel pipe according to the outline process requirements of the hot-rolled seamless steel pipe online cooling system .
  • the cooling water spray ring 7 of the cooling device 6 can be adjusted in height through the sizing front roller table 2, the sizing rear roller table 3 or the hydraulic drive device, so as to centrally cool the steel pipe to ensure the cooling effect.
  • the inner cavity of the cooling water spray ring 7 of the cooling device 6 is divided into a water inlet cavity and a water outlet cavity by an annular partition 73, so that the water flow of the inlet cavity can pass through the through holes on the annular partition 73 It flows into the water outlet cavity and is sprayed from the cooling nozzle 72 to ensure the stability of the spray flow of the cooling spray ring 7 and improve the cooling effect.
  • the length of the water splitting header is greater than the length of the cooling device 6, which prevents the unstable turbulence formed at the blind plates at both ends of the water splitting header from affecting the pressure of the cooling device 6, thereby ensuring the cooling device 6 The pressure is more stable.
  • the inner diameter of the cooling water spray ring 7 may be larger than when the cooling device 6 is arranged at the roller table 3 after the sizing and when the cooling device 6 When it is set at the cooling roller table 5, the inner diameter of the cooling water spray ring 7 can better meet the actual requirements.
  • the number of cooling water spray rings 7 can be 2-8, the inner diameter can be 550-720mm, and the cooling nozzle 72 can be arranged along its ring
  • the water pressure adjustment range can be 0.2-0.8Mpa, the steel pipe passes through the cooling device 6, and the temperature drop is controlled at 20-120°C, reducing the intermediate temperature before sizing; when the cooling device 6 is set at When there are 3 roller tables after sizing, the number of cooling water spray rings 7 can be 3-10, the inner diameter can be 450-660mm, and the cooling nozzles 72 can be 4-10 rows evenly arranged along its annular inner wall.
  • the pressure adjustment range can be 0.2 ⁇ 0.8Mpa.
  • the final cooling temperature is controlled to drop to 35°C above the Ar3 temperature to ensure that when the steel pipe enters the cooling device 6 between the sizing machine 1 and the cooling bed 4, the cooling temperature is turned on Above Ar3 temperature; when the cooling device 6 is installed at the cooling roller table 5, the number of cooling water spray rings 7 can be 30-60, the inner diameter can be 450-660mm, and the cooling nozzle 72 can be along its annular inner wall surface. Evenly arranged 2-8 rows, the water pressure adjustment range can be 0.2-0.8Mpa, and the temperature of the steel pipe after cooling is controlled at 80-750°C.
  • a plurality of bypass pipelines are communicated with the branch water collection pipe, and a pressure regulating valve is provided on the bypass pipeline.
  • the size of the opening of the bypass pipeline realizes the adjustment of the cooling water pressure and ensures the stable pressure of the cooling nozzle 72 of the cooling water spray ring 7.
  • the spray water flow rate of the upper half water spray ring 74 and the lower half water spray ring 75 is 80 ⁇ 240m 3 /h; when the cooling device 6 When installed at the roller table 3 after the sizing, the spray water flow range of the upper half water spray ring 74 and the lower half water spray ring 75 is 80 ⁇ 220m 3 /h; and when the cooling device 6 is installed at the cooling roller table 5 , The spray water flow range of the upper half water spray ring 74 and the lower half water spray ring 75 is 30 ⁇ 180m 3 /h.
  • the water ratio of the upper half of the water spray ring 74 and the lower half of the water spray ring 75 can both be 1.05-1.5.
  • the flow rate of the integral annular water spray ring 8 can be 160 ⁇ 480m 3 /h, and it is located at the water inlet and the lower end of the integral annular water spray ring 8
  • the water inlet water ratio can be 1.05 ⁇ 1.5; when the cooling device 6 is arranged at the roller table 3 after sizing, the flow range of the integral annular water spray ring 8 can be 160 ⁇ 440m 3 /h, and it is located in the overall annular shape.
  • the water ratio of the water inlet at the upper end and the water inlet at the lower end of the water spray ring 8 can both be 1.05 ⁇ 1.5; and when the cooling device 6 is arranged at the cooling roller table 5, the flow rate range of the integral annular water spray ring 8 can be 60 ⁇ 360m 3 /h, and the water inlet at the upper end of the integral annular water spray ring 8 and the water inlet at the lower end may have a water ratio of 1.05 to 1.5.
  • the embodiment of the present invention also provides a method for arranging a cooling device on a hot-rolled seamless steel pipe on-line cooling system.
  • the hot-rolled seamless steel pipe on-line cooling system is the aforementioned hot-rolled seamless steel pipe on-line cooling system.
  • the cooling device 6 is installed at the roller table 2 before the sizing, the cooling device 6 is installed at the roller table 3 after the sizing, and the cooling device 6 is installed
  • One or more combinations in the cooling roller table 5 cool the hot-rolled seamless steel pipe, which is flexible and convenient to use.
  • the cooling device 6 is installed at the roller table 2 before the sizing, and the cooling device 6 is installed at the roller table 2 before the sizing, the roller table 3 after the sizing, and the cooling roller table 5 as examples. Specific instructions.
  • the cooling device 6 is arranged on the sizing front roller table 2, and the height of the cooling device 6 can be adjusted with the height of the sizing front roller table 2 to realize the centering cooling of the steel pipe. It is 8 groups of circular water spray rings.
  • the cooling water spray ring 7 is composed of an upper water spray ring and a lower water spray ring with an inner diameter of 650 mm arranged symmetrically up and down; 6 rows of cooling nozzles are evenly arranged on the inner surface of the water spray ring, and the number of cooling nozzles in a single row is 52.
  • the water pressure adjustment range of the water ring is 0.2 ⁇ 0.8MPa, the flow rate of the upper and lower spraying rings can be independently controlled, the spraying flow range is 80 ⁇ 150m3/h, and the water ratio of the upper and lower spraying rings is within the range of 1.05 ⁇ 1.5.
  • the water inlet 71 is arranged on the outer surface of the water spray ring, which is connected to the water distribution collection pipe through the water supply pipeline and the regulating valve group.
  • the regulating valve group is used to realize the flow control of the water spray ring.
  • the water distribution collection pipe is parallel to the water supply pipe and the regulating valve group.
  • the arranged cooling water spray ring 7 is connected, and the branch water collection pipe is provided with a number of bypass pipes.
  • the water pressure of the spray ring can be adjusted by adjusting the opening degree of the bypass pipe to ensure stable pressure at the outlet of the cooling nozzle.
  • the total length of the water distribution collection pipe is longer than that of the cooling
  • the length of the device 6 is 1.5m.
  • the water spray ring cavity is divided into a water inlet cavity and a water outlet cavity by an annular water barrier.
  • the annular water barrier is provided with a through hole, and both the water inlet cavity and the water outlet cavity are arranged with sewage holes.
  • the temperature of the steel pipe after continuous rolling is 950 ⁇ 980°C. In order to ensure the size of the steel pipe, it needs to be sized below 930°C. Before sizing, it is usually necessary to wait for 20s to be air-cooled to the target temperature on the chain bed between the continuous rolling and the sizing machine 1 (1). After the cooling water spray ring 7 is added before sizing, the flow, pressure and configuration of the cooling water spray ring 7 are set according to the temperature drop requirements of the steel pipe to ensure that the steel pipe can be directly sized and cooled after cooling.
  • the cooling devices 6 are respectively arranged at the roller table 3 after sizing and the cooling roller table 5 between the sizing machine 1 and the cooling bed 4.
  • the cooling device 6 installed on the roller table 3 after sizing is 10 integral water spray rings 8.
  • the inner diameter of the water spray ring is 660mm, and the inner surface of the water spray ring is evenly arranged with multiple rows of cooling nozzles in the width direction.
  • the number of single-row cooling nozzles is 36 to 70, and the water inlet 81 is arranged on the outer surface of the water spray ring. To realize the flow control of the water spray ring.
  • the water pressure adjustment range of the water spray ring is 0.2 ⁇ 0.8MPa, the flow rate of the upper and lower spray rings can be independently controlled, the spray water flow range is 80 ⁇ 220m3/h, and the water ratio of the upper and lower spray rings is within the range of 1.05 ⁇ 1.5;
  • the cooling device 6 arranged at the cooling roller table 5 (inclined roller table) between the hot-rolled seamless steel pipe sizing machine 1 and the cooling bed 4 is composed of 42 cooling water spray rings 7, which are symmetrical from top to bottom
  • the arranged upper half water spray ring 74 and lower half water spray ring 75 with an inner diameter of 600mm are arranged; 3 rows of cooling nozzles are evenly arranged on the inner surface of the water spray ring, and the water pressure adjustment range of the water spray ring is 0.2 ⁇ 0.8MPa, up and down
  • the spray ring flow can be independently controlled, the spray water flow range is 30 ⁇ 180m3/h, the upper and lower spray ring water ratio is in the range of 1.05 ⁇ 1.5, the cooling device 6 is installed by the hydraulic device to realize the height adjustment of the spray ring to ensure the cooling of the steel pipe. .
  • the split header is equipped with several bypass pipelines.
  • the spray ring water pressure can be adjusted by adjusting the opening degree of the bypass pipeline, which is used to adjust the cooling water pressure and ensure the stable pressure at the outlet of the cooling nozzle.
  • the total length of the split header at each position The length of the water spray ring is 1.5m longer than the cooling device 6 at the location.
  • the water spray ring cavity is divided into a water inlet cavity and a water outlet cavity by an annular water barrier. Sewage holes are arranged.
  • the outlet temperature of the steel pipe is 1010°C.
  • the steel pipe passes through the cooling device after sizing.
  • the post temperature was at 920°C.
  • the cooling temperature is 900°C
  • the water spray ring is adjusted by adjusting the roller table running speed to 1.0m/s.
  • the number of openings, water volume and pressure control the temperature of the steel pipe after cooling at 640°C, and then turning over to the cooling bed 4 by the rotating arm (10, 11) to cool to room temperature.
  • the yield strength of the steel pipe is 260MPa
  • the tensile strength is 448MPa
  • the elongation is 34.6.
  • % Makes the mechanical properties of the steel pipe meet the performance requirements. Through forced cooling after sizing, the excessive growth of austenite grains due to high temperature is avoided, which is beneficial to the grain refinement of the ferrite transformation process, thereby affecting the mechanical properties of steel pipes and realizing the rolling of thick gauge steel pipe products. State direct supply.
  • the cooling devices 6 are respectively arranged at the roller table 2 before sizing, the roller table 3 after sizing, and the cooling roller table 5 between the sizing machine 1 and the cooling bed 4.
  • the cooling water spray ring 7 is composed of an upper half water spray ring 74 and a lower half water spray ring 75 arranged symmetrically up and down. There are multiple rows of cooling nozzles evenly arranged in the width direction of the inner surface of the water spray ring to realize water spray cooling on the outer surface of the steel pipe.
  • the number of single-row cooling nozzles ranges from 36 to 70, and the water inlet 71 is arranged on the outer surface of the spray ring, which is connected to the diversion collection pipe through the water supply pipeline and the regulating valve group.
  • the regulating valve group is used to realize the flow control of the spray ring and the diversion
  • the water collection pipe is provided with several bypass pipes.
  • the spray ring water pressure can be adjusted by adjusting the opening degree of the bypass pipe, which is used to adjust the cooling water pressure and ensure the stable pressure at the outlet of the cooling nozzle.
  • the total length of the split water collection pipe at each position The length of the cooling device 6 is 1.5m longer than the location.
  • the water spray ring cavity is divided into a water inlet cavity and a water outlet cavity by an annular water barrier. Drain hole.
  • the cooling water spray ring 7 is composed of an upper water spray ring 74 and a lower water spray ring 75 with an inner diameter of 720mm arranged symmetrically up and down; 8 rows of cooling nozzles are evenly arranged on the inner surface of the water spray ring, and the number of cooling nozzles in a single row is 38
  • the water pressure adjustment range of the water spray ring is 0.2 ⁇ 0.8MPa
  • the flow rate of the upper and lower water spray rings 75 can be independently controlled
  • the spray water flow range is 80 ⁇ 240m3/h
  • the water ratio of the upper and lower spray rings is within the range of 1.05 ⁇ 1.5.
  • the cooling device 6 is installed on the roller table 3 after the sizing.
  • the height of the cooling device 6 can be adjusted with the height of the roller table 3 after the sizing to realize the centering cooling of the steel pipe.
  • the cooling device 6 is composed of 6 cooling water spray rings 7 with cooling spray
  • the water ring 7 is composed of an upper water spray ring 74 and a lower water spray ring 75 with an inner diameter of 660mm arranged symmetrically up and down; 7 rows of cooling nozzles are evenly arranged in the width direction of the inner surface of the water spray ring, and the water pressure of the water spray ring is adjusted
  • the range is 0.2 ⁇ 0.8MPa, the upper and lower spray ring flow can be independently controlled, the spray water flow range is 80 ⁇ 220m3/h, and the upper and lower spray ring water ratio is in the range of 1.05 ⁇ 1.5;
  • the cooling device 6 is arranged at the cooling roller table 5 (inclined roller table) between the hot-rolled seamless steel pipe sizing machine 1 and the cooling bed 4.
  • the cooling device 6 is composed of 42 cooling water spray rings 7, and the cooling water spray ring 7 is composed of
  • the upper half of the water spray ring 74 and the lower half of the water spray ring 75 are arranged symmetrically with an inner diameter of 600mm; 3 rows of cooling nozzles are evenly arranged on the inner surface of the water spray ring, and the water pressure adjustment range of the water spray ring is 0.2 ⁇ 0.8MPa ,
  • the flow rate of the upper and lower spray rings can be independently controlled, the spray water flow range is 30 ⁇ 180m3/h, and the water ratio of the upper and lower spray rings is within the range of 1.05 ⁇ 1.5.
  • the cooling device 6 is installed and driven by the hydraulic device to realize the height adjustment of the spray ring to ensure the steel pipe alignment. Medium cooling.
  • the temperature of the steel pipe is 1090°C after continuous rolling, and the temperature of the cold control steel pipe is controlled between 1040 ⁇ 1060°C through the cooling device 6 before sizing.
  • the cooling header opening quantity, water volume and pressure are adjusted by the cooling device 6 after sizing, and the temperature of the steel pipe after cooling is controlled at 960°C.
  • the opening and cooling temperature is 940°C
  • the running speed of the roller table to 1.0m/s
  • adjusting the number of opening of the water spray ring the water volume and pressure control the temperature of the steel pipe after cooling at 630°C
  • the revolving arm (10, 11) is turned over to the cooling bed 4 and cooled to room temperature.
  • the steel pipe After testing, the steel pipe has a yield strength of 362MPa, a tensile strength of 523MPa, and an elongation of 28.7%. This makes the mechanical properties of the steel pipe meet the performance requirements and realizes the direct rolling of thick gauge steel pipe products. Supply.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

La présente invention concerne un système de refroidissement en ligne pour un tube d'acier sans soudure laminé à chaud, et un procédé d'agencement pour un dispositif de refroidissement sur le système de refroidissement en ligne, dont l'objectif principal est d'améliorer l'efficacité de production et la performance globale de tubes d'acier sans soudure laminés à chaud. Selon la solution technique principale de la présente invention, la chaîne de production comprend une table de rouleaux avant de calibrage et une table de rouleaux arrière de calibrage qui sont respectivement situées devant et derrière un laminoir calibreur, et une table de rouleaux de refroidissement et un dispositif de refroidissement qui sont situés entre un lit de refroidissement et le laminoir calibreur, le dispositif de refroidissement étant agencé au niveau de la table de rouleaux avant de calibrage et/ou le dispositif de refroidissement étant agencé au niveau de la table de rouleaux arrière de calibrage et/ou le dispositif de refroidissement étant agencé au niveau de la table de rouleaux de refroidissement ; le dispositif de refroidissement comprend une pluralité d'anneaux de pulvérisation d'eau de refroidissement agencés dans la direction de transport de la table de rouleaux ; la surface de l'anneau de pulvérisation d'eau de refroidissement est pourvue d'une entrée d'eau qui est en communication avec un tuyau de division d'écoulement et de collecte d'eau au moyen d'une canalisation de distribution d'eau et d'un groupe de vannes de réglage, le tuyau de division d'écoulement et de collecte d'eau étant parallèle au dispositif de refroidissement, et la longueur du tuyau de division d'écoulement et de collecte d'eau étant plus longue que la longueur du dispositif de refroidissement ; et la paroi interne de la bague de pulvérisation d'eau de refroidissement est pourvue d'une sortie d'eau, et l'anneau de pulvérisation d'eau de refroidissement est pourvu à l'intérieur d'une plaque de séparation annulaire, dans laquelle des trous traversants sont agencés.
PCT/CN2021/078670 2020-04-29 2021-03-02 Système de refroidissement en ligne pour tube d'acier sans soudure laminé à chaud, et procédé d'agencement pour dispositif de refroidissement sur un système de refroidissement en ligne WO2021218357A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010356564.4 2020-04-29
CN202010356564.4A CN111589885A (zh) 2020-04-29 2020-04-29 热轧无缝钢管在线冷却系统及冷却装置在其上的布置方法

Publications (1)

Publication Number Publication Date
WO2021218357A1 true WO2021218357A1 (fr) 2021-11-04

Family

ID=72182402

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/078670 WO2021218357A1 (fr) 2020-04-29 2021-03-02 Système de refroidissement en ligne pour tube d'acier sans soudure laminé à chaud, et procédé d'agencement pour dispositif de refroidissement sur un système de refroidissement en ligne

Country Status (2)

Country Link
CN (1) CN111589885A (fr)
WO (1) WO2021218357A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114622080A (zh) * 2022-03-10 2022-06-14 云南曲靖钢铁集团凤凰钢铁有限公司 一种炼钢无缝钢管的精细化控制冶炼系统
CN114961612A (zh) * 2022-06-09 2022-08-30 西藏电建成勘院工程有限公司 一种用于地质勘探的取芯装置
CN118361751A (zh) * 2024-06-19 2024-07-19 西北工业大学 一种嵌套式复合材料轻质耐高温再生冷却燃烧室

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111589885A (zh) * 2020-04-29 2020-08-28 东北大学 热轧无缝钢管在线冷却系统及冷却装置在其上的布置方法
CN112378166B (zh) * 2020-11-16 2021-12-28 灵璧久工精密钢管制造有限公司 一种无缝钢管加工用冷却装置及其使用方法
CN114440044B (zh) * 2021-12-28 2024-06-11 河北华丰能源科技发展有限公司 一种便于拆装的冷却装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101829679A (zh) * 2009-03-09 2010-09-15 鞍钢股份有限公司 一种改善热轧油井管接箍料冲击韧性的生产方法
CN202438554U (zh) * 2011-12-31 2012-09-19 湖北新冶钢有限公司 大口径厚壁无缝钢管控轧控冷系统
CN106269931A (zh) * 2016-10-25 2017-01-04 东北大学 一种热轧无缝钢管在线连续冷却的方法
CN206153302U (zh) * 2016-10-25 2017-05-10 东北大学 一种热轧无缝钢管在线控制冷却设备
CN107309280A (zh) * 2015-07-20 2017-11-03 东北大学 多腔体流量可控喷淋集管
JP2017202513A (ja) * 2016-05-13 2017-11-16 Ｊｆｅスチール株式会社 電縫鋼管の製造方法
CN111589885A (zh) * 2020-04-29 2020-08-28 东北大学 热轧无缝钢管在线冷却系统及冷却装置在其上的布置方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4661226B2 (ja) * 2005-01-12 2011-03-30 Ｊｆｅスチール株式会社 鋼板の冷却方法及び冷却装置
CN107971346B (zh) * 2016-10-25 2020-03-27 宝山钢铁股份有限公司 一种钢管定径机终轧后控冷方法及专用装置
CN106269916B (zh) * 2016-10-25 2019-03-01 东北大学 一种热轧无缝钢管在线控制冷却系统及工艺方法
CN206153294U (zh) * 2016-10-25 2017-05-10 东北大学 一种热轧无缝钢管在线控制冷却系统
CN209578093U (zh) * 2019-03-08 2019-11-05 威尔机械江苏有限公司 一种连铸机冷却辊道
CN212238631U (zh) * 2020-04-29 2020-12-29 东北大学 热轧无缝钢管在线冷却系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101829679A (zh) * 2009-03-09 2010-09-15 鞍钢股份有限公司 一种改善热轧油井管接箍料冲击韧性的生产方法
CN202438554U (zh) * 2011-12-31 2012-09-19 湖北新冶钢有限公司 大口径厚壁无缝钢管控轧控冷系统
CN107309280A (zh) * 2015-07-20 2017-11-03 东北大学 多腔体流量可控喷淋集管
JP2017202513A (ja) * 2016-05-13 2017-11-16 Ｊｆｅスチール株式会社 電縫鋼管の製造方法
CN106269931A (zh) * 2016-10-25 2017-01-04 东北大学 一种热轧无缝钢管在线连续冷却的方法
CN206153302U (zh) * 2016-10-25 2017-05-10 东北大学 一种热轧无缝钢管在线控制冷却设备
CN111589885A (zh) * 2020-04-29 2020-08-28 东北大学 热轧无缝钢管在线冷却系统及冷却装置在其上的布置方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114622080A (zh) * 2022-03-10 2022-06-14 云南曲靖钢铁集团凤凰钢铁有限公司 一种炼钢无缝钢管的精细化控制冶炼系统
CN114622080B (zh) * 2022-03-10 2023-11-24 云南曲靖钢铁集团凤凰钢铁有限公司 一种炼钢无缝钢管的精细化控制冶炼系统
CN114961612A (zh) * 2022-06-09 2022-08-30 西藏电建成勘院工程有限公司 一种用于地质勘探的取芯装置
CN118361751A (zh) * 2024-06-19 2024-07-19 西北工业大学 一种嵌套式复合材料轻质耐高温再生冷却燃烧室

Also Published As

Publication number Publication date
CN111589885A (zh) 2020-08-28

Similar Documents

Publication Publication Date Title
WO2021218357A1 (fr) Système de refroidissement en ligne pour tube d'acier sans soudure laminé à chaud, et procédé d'agencement pour dispositif de refroidissement sur un système de refroidissement en ligne
CN101879531A (zh) 一种冷却板形可控制的热轧带钢层流冷却装置
CN103894427A (zh) 一种中厚板在线多功能冷却装置
CN212238631U (zh) 热轧无缝钢管在线冷却系统
CN102274864B (zh) 一种基于超快冷技术的轧后冷却系统及该系统的应用方法
CN109174981A (zh) 一种热连轧中间坯冷却装置及其使用方法
CN106311763A (zh) 一种热轧无缝钢管控制冷却用环形射流冷却装置
CN207899906U (zh) 矫直机氧化铁皮组合吹扫装置
CN102061363A (zh) 一种中厚钢板直接淬火的装置及其工艺
CN113088647A (zh) 一种淬火冷却自动控制方法
CN201744506U (zh) 一种冷却板形可控制的热轧带钢层流冷却装置
CN110586662A (zh) 一种棒材全流程控轧控冷生产线
CN203295564U (zh) 热轧薄板淬火水处理控制系统
CN203875302U (zh) 一种连铸用全水冷辊道
CN106168447B (zh) 多台中频感应炉和控制柜热交换水集中循环冷却装置
CN111589880B (zh) 改善中厚壁无缝钢管在线冷却工艺组织均匀性的控制方法
CN208250364U (zh) 优质大棒材“淬火+低温回火”生产系统
CN102586565A (zh) 中厚板热处理炉炉后快冷方法及快冷装置
CN217377969U (zh) 一种用于钢板回火后柔性冷却的装置
CN103357675B (zh) 热轧h型钢冷床气雾冷却方法及其装置
CN114592112A (zh) 一种钢板回火后柔性冷却装置
CN210788602U (zh) 一种棒材全流程控轧控冷生产线
CN200945495Y (zh) 带冷却装置的辊式矫正机热态工作辊
CN109423542A (zh) 钢管离线淬火外喷冷却装置及方法
CN114672628B (zh) 一种基于连铸机末端的板坯表面淬火系统与工艺

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21795821

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21795821

Country of ref document: EP

Kind code of ref document: A1