CN111589885A - Online cooling system for hot-rolled seamless steel pipe and arrangement method of cooling device on online cooling system - Google Patents
Online cooling system for hot-rolled seamless steel pipe and arrangement method of cooling device on online cooling system Download PDFInfo
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- CN111589885A CN111589885A CN202010356564.4A CN202010356564A CN111589885A CN 111589885 A CN111589885 A CN 111589885A CN 202010356564 A CN202010356564 A CN 202010356564A CN 111589885 A CN111589885 A CN 111589885A
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- 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
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- 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
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- 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
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- 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
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- 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
Abstract
The invention discloses an online cooling system of a hot-rolled seamless steel pipe and an arrangement method of a cooling device on the online cooling system, and mainly aims to improve the production efficiency and the comprehensive performance of the hot-rolled seamless steel pipe. The main technical scheme of the invention is as follows: the production line comprises a sizing front roller way and a sizing rear roller way which are respectively positioned at the front and the rear of a sizing mill, and a cooling roller way and a cooling device which are positioned between a cooling bed and the sizing mill; the cooling device is arranged at the position of the roller way before sizing; and/or the cooling device is arranged at the position of the roller way after sizing; and/or the cooling device is arranged at the cooling roller way; the cooling device comprises a plurality of cooling water spray rings arranged along the conveying direction of the roller way, the outer surface of each cooling water spray ring is provided with a water inlet, the water inlets are communicated with the shunting water collecting pipes through water supply pipelines and the regulating valve group, the shunting water collecting pipes are arranged in parallel with the cooling device, and the length of each shunting water collecting pipe is greater than that of the cooling device; the inner wall of the cooling water spray ring is provided with a water outlet, an annular partition plate is arranged in the cooling water spray ring, and a through hole is arranged on the annular partition plate.
Description
Technical Field
The invention relates to the technical field of hot-rolled seamless steel pipe production, in particular to an online cooling system for a hot-rolled seamless steel pipe and an arrangement method of a cooling device on the online cooling system.
Background
At present, in the production process of hot-rolled seamless steel pipes, in order to ensure better mechanical properties of the steel pipes or control the pipe shapes of the steel pipes in the sizing procedure, an air cooling and temperature waiting mode is usually adopted to enable the temperature in sizing to be in a relatively low state, so that the production efficiency of the hot-rolled seamless steel pipes is reduced. Moreover, when the hot-rolled seamless steel pipe is positioned at a sizing outlet, austenite grains are easy to grow excessively due to high temperature, which is not beneficial to grain refinement in the ferrite phase transformation process, thereby influencing the mechanical property of the steel pipe. Meanwhile, when the hot-rolled seamless steel pipe is positioned between the sizing mill and the cooling bed, the online regulation and control of the structure performance of the hot-rolled seamless steel pipe after rolling cannot be realized, so that the control of the structure type, shape and size of the steel pipe cannot be realized, and further the comprehensive performance of the steel pipe is low.
Disclosure of Invention
In view of this, the embodiments of the present invention provide an online cooling system for hot-rolled seamless steel pipes and a method for arranging a cooling device thereon, which mainly aim to improve the production efficiency and the overall performance of hot-rolled seamless steel pipes.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
in one aspect, an embodiment of the present invention provides an online cooling system for a hot-rolled seamless steel tube, including:
the sizing device comprises a sizing front roller way, a sizing rear roller way, a cooling roller way and a cooling device, wherein the sizing front roller way and the sizing rear roller way are respectively positioned in front of and behind a sizing mill, and the cooling roller way and the cooling device are positioned between a cooling bed and the sizing mill;
the cooling device is arranged at the position of the roller way before sizing, and the height of the cooling device can be adjusted along with the height of the roller way before sizing; and/or the cooling device is arranged at the position of the sizing roller way, and the height of the cooling device can be adjusted along with the height of the sizing roller way; and/or the cooling device is arranged at the cooling roller way, and the height of the cooling device is adjusted by a hydraulic driving device;
the cooling device comprises a plurality of cooling water spraying rings arranged along the conveying direction of the roller way;
the outer surface of the cooling water spray ring is provided with a water inlet which is communicated with a shunting water collecting pipe through a water supply pipeline and an adjusting valve group, the shunting water collecting pipe is arranged in parallel with the cooling device, and the length of the shunting water collecting pipe is greater than that of the cooling device;
the inner wall of the cooling water spray ring is provided with a plurality of rows of cooling nozzles which are uniformly distributed, an annular partition plate which divides the inner cavity of the cooling water spray ring into a water inlet cavity and a water outlet cavity is arranged in the cooling water spray ring, through-flow holes are formed in the annular partition plate, the water inlet cavity and the water outlet cavity are communicated through the through-flow holes, and the flow rate and the pressure stability of cooling water sprayed out of the cooling nozzles of the cooling water spray ring are controlled by the flow rate of the water inlet and the arrangement form and the size of the through-flow holes in the annular partition plate;
the cooling water spray ring comprises an upper half water spray ring and a lower half water spray ring which are opposite and independent to each other; or the cooling water spray ring is an integrally communicated integral annular water spray ring;
the annular partition plate comprises an upper half partition plate and a lower half partition plate which are opposite, the upper half partition plate and the lower half partition plate sequentially and respectively divide the inner cavities of the upper half water spray ring and the lower half water spray ring into a water inlet cavity and a water outlet cavity, and the upper half partition plate and the lower half partition plate are respectively provided with the through flow holes; or the annular partition plate is of an integral annular plate-shaped structure, the inner cavity of the integral annular water spraying ring is divided into the water inlet cavity and the water outlet cavity by the integral annular plate-shaped structure, and the through flow hole is formed in the integral annular plate-shaped structure;
the end surfaces of the two ends of the upper half water spray ring are respectively provided with a first sewage discharge port and a second sewage discharge port which are communicated with the water inlet cavity and the water outlet cavity of the upper half water spray ring, and the middle part of the side surface of the lower half water spray ring is provided with a third sewage discharge port and a fourth sewage discharge port which are respectively communicated with the water inlet cavity and the water outlet cavity of the lower half water spray ring; or a fifth sewage draining outlet and a sixth sewage draining outlet which are respectively communicated with the water inlet cavity and the water outlet cavity are arranged in the middle of the side surface of the lower part of the integral annular water spraying ring;
furthermore, the first sewage draining port, the second sewage draining port, the third sewage draining port, the fourth sewage draining port, the fifth sewage draining port and the sixth sewage draining port are buckled with detachable cover bodies; and/or a drain valve is arranged at each of the first drain outlet, the second drain outlet, the third drain outlet, the fourth drain outlet, the fifth drain outlet and the sixth drain outlet.
Further, when the cooling device is arranged at the position of the roller way before sizing, the inner diameter of the cooling water spray ring is larger than that when the cooling device is arranged at the position of the roller way after sizing and when the cooling device is arranged at the position of the cooling roller way, the inner diameter of the cooling water spray ring is larger than that of the cooling water spray ring.
Further, when the cooling device is arranged at the position of the roller way before sizing, the number of the cooling water spray rings is 2-8, the inner diameter is 550-720 mm, the cooling nozzles are 4-10 rows uniformly distributed along the annular inner wall surface of the cooling nozzle, the water pressure adjusting range is 0.2-0.8 Mpa, the flow ranges of the upper half water spray ring and the lower half water spray ring are both 80-240 m3/h, and the water ratio of the upper half water spray ring and the lower half water spray ring is 1.05-1.5; or the flow range of the integral annular water spray ring is 160-480 m3The water ratio of a water inlet at the upper end of the integral annular water spraying ring to a water inlet at the lower end of the integral annular water spraying ring is 1.05-1.5;
when the cooling device is arranged at the position of the roller way after sizing, the number of the cooling water spraying rings is 3-10, the inner diameter is 450-660 mm, the cooling nozzles are 4-10 rows uniformly distributed along the annular inner wall surface of the cooling nozzles, and the water pressure adjusting range is 0.2-0.8 Mpa; the flow ranges of the upper half water spray ring and the lower half water spray ring are both 80-220 m3The water ratio of the upper half water spray ring to the lower half water spray ring is 1.05-1.5; or the flow range of the integral annular water spray ring is 160-440 m3The water ratio of a water inlet at the upper end of the integral annular water spraying ring to a water inlet at the lower end of the integral annular water spraying ring is 1.05-1.5;
when the cooling device is arranged at the cooling roller way, the number of the cooling water spraying rings is 30-60, the inner diameter is 450-660 mm, the cooling nozzles are uniformly distributed in 2-8 rows along the annular inner wall surface of the cooling nozzles, the water pressure adjusting range is 0.2-0.8 Mpa, and the upper half water spraying ringsThe flow range of the lower half water spray ring is 30-180 m3The water ratio of the upper half water spray ring to the lower half water spray ring is 1.05-1.5; or, the flow range of the integral annular water spray ring is 60-360 m3And h, the water ratio of a water inlet at the upper end of the integral annular water spraying ring to a water inlet at the lower end of the integral annular water spraying ring is 1.05-1.5.
Furthermore, the shunting water collecting pipe is communicated with a plurality of bypass pipelines, pressure regulating valves are arranged on the bypass pipelines, and outlets of the bypass pipelines are used for being communicated with the rolling ditches.
Further, the length of the diversion water collecting pipe is at least 1.5m greater than the length of the cooling device.
In another aspect, an embodiment of the present invention provides a method for arranging a cooling device on an online cooling system for a hot-rolled seamless steel pipe, where the online cooling system for a hot-rolled seamless steel pipe is the above online cooling system for a hot-rolled seamless steel pipe, and the method includes:
and according to the outline process requirements of the hot-rolled seamless steel pipe production line, cooling the hot-rolled seamless steel pipe by adopting one or more combination modes of arranging the cooling device at the position of the roller way before sizing, arranging the cooling device at the position of the roller way after sizing and arranging the cooling device at the position of the cooling roller way.
By means of the technical scheme, the invention at least has the following beneficial effects:
in the technical scheme provided by the embodiment of the invention, the cooling device can be arranged at a roller way before sizing; and/or, the roller bed is arranged at the position of the roller bed after sizing; and/or the cooling roller way is arranged, so that when the cooling device is arranged at the roller way before sizing, the temperature waiting time of the steel pipe can be reduced in a water cooling mode, and the production efficiency is improved; when the cooling device is arranged at the position of the roller way after sizing, the steel pipe after sizing is rapidly cooled, austenite in a work hardening state is reserved, and grain refinement in a ferrite phase transition process is facilitated, so that the mechanical property of the steel pipe is ensured; when the cooling device is arranged at the cooling roller way, the online regulation and control of the structure performance of the rolled steel tube can be realized, so that the control of the structure type, the shape and the size of the steel tube can be realized, the strengthening mechanism effects of fine grain strengthening, dislocation strengthening, phase change strengthening and the like can be achieved, and further the comprehensive performance of the steel tube is improved.
Wherein, the cooling water spray ring of the cooling device can be adjusted in height through the sizing front roller way, the sizing rear roller way or the hydraulic driving device, so that the steel pipe is centered and cooled, and the cooling effect is ensured. In addition, the inner cavity of the cooling water spray ring of the cooling device in the embodiment of the invention is divided into the water inlet cavity and the water outlet cavity by the annular partition plate, so that the water flow in the water inlet cavity can flow into the water outlet cavity through the through hole on the annular partition plate and then is sprayed out by the cooling nozzle, the stability of the spraying flow of the cooling water spray ring is ensured, and the cooling effect is improved. In addition, the length of the shunting water collecting pipe is greater than that of the cooling device, so that when water comes, unstable turbulence formed at blind plates at two ends of the shunting water collecting pipe influences the pressure of the cooling device, and the pressure of the cooling device is guaranteed to be more stable.
Drawings
FIG. 1 is a schematic structural diagram of an on-line cooling system for a hot-rolled seamless steel tube according to an embodiment of the present invention;
FIG. 2 is a schematic view of a cooling water spray ring of the cooling device of FIG. 1;
FIG. 3 is a schematic view of the lower half of the water spray ring of FIG. 2;
FIG. 4 is a schematic view of the upper half of the water spray ring of FIG. 2;
FIG. 5 is a schematic view of another cooling water spray ring of the cooling device of FIG. 1 at a first viewing angle;
fig. 6 is a schematic view of another cooling water spray ring of the cooling device in fig. 1 at a second view angle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present embodiment.
As shown in fig. 1 to 6, an embodiment of the present invention provides an online cooling system for a hot-rolled seamless steel tube, which includes a sizing front roller way 2 and a sizing rear roller way 3 respectively located in front of and behind a sizing mill 1, a cooling roller way 5 located between a cooling bed 4 and the sizing mill 1, and a cooling device 6; the cooling device 6 is arranged at the position of the roller way 2 before sizing, and the height of the cooling device can be adjusted along with the height of the roller way 2 before sizing; and/or the cooling device 6 is arranged at the position of the roller way 3 after sizing, and the height of the cooling device can be adjusted along with the height of the roller way 3 after sizing; and/or the cooling device 6 is arranged at the cooling roller table 5, and the height of the cooling roller table is adjusted by a hydraulic driving device; the cooling device 6 comprises a plurality of cooling water spraying rings 7 which are arranged along the conveying direction of the roller way; the outer surface of the cooling water spray ring 7 is provided with a water inlet 71, the water inlet 71 is communicated with a shunting water collecting pipe through a water supply pipeline and an adjusting valve group, the shunting water collecting pipe is arranged in parallel with the cooling device 6, and the length of the shunting water collecting pipe is greater than that of the cooling device 6; the inner wall of the cooling water spray ring 7 is provided with a plurality of rows of cooling nozzles 72 which are uniformly distributed, an annular partition plate 73 which divides the inner cavity of the cooling water spray ring 7 into a water inlet cavity and a water outlet cavity is arranged in the cooling water spray ring 7, through-flow holes are formed in the annular partition plate 73, the water inlet cavity is communicated with the water outlet cavity through the through-flow holes, and the flow rate and the pressure stability of cooling water sprayed out of the cooling nozzles 72 of the cooling water spray ring 7 can be controlled by the flow rate of the water inlet 71 and the arrangement form and the size of the through-flow.
Fig. 1 shows the arrangement of the cooling devices on the pre-sizing roller table 2, the post-sizing roller table 3 and the cooling roller table 6.
According to the on-line cooling system for the hot-rolled seamless steel tube, the cooling device 6 can be selected to be arranged at the position of the roller way 2 before sizing, at the position of the roller way 3 after sizing and at one or more of the positions of the cooling roller way 5 according to the outline process requirements, and the on-line cooling system is flexible and convenient to use.
In some examples, the flow dividing and collecting pipe may be a pipe structure with blind plates at two ends, which may communicate with the water inlet 71 of the cooling water spray ring 7 through a water supply pipeline provided with a regulating valve set. In order to solve the technical problem that unstable turbulence is easily formed at the blind plates at the two ends of the diversion water collecting pipe when water comes, and if the turbulence enters the cooling water spray ring 7, the pressure of the whole cooling device 6 is easily unstable, the length of the diversion water collecting pipe is set to be larger than that of the cooling device 6, namely when the diversion water collecting pipe and the cooling water spray ring are arranged in parallel, the two ends of the diversion water collecting pipe respectively exceed the two ends of the cooling device 6, so that the turbulence is prevented from entering the cooling water spray ring 7, and the pressure stability of the cooling device 6 is further ensured. In particular, the length of the diversion header may be at least 1.5m greater than the length of the cooling device 6.
In some examples, an annular partition plate 73 is arranged in the cooling water spray ring 7, the inner cavity of the cooling water spray ring is divided into a water inlet cavity and a water outlet cavity, uniformly distributed through holes are formed in the annular partition plate 73, the water inlet cavity and the water outlet cavity are communicated through the through holes, and the cooling water spray ring can enter the water outlet cavity after entering the water inlet cavity from the water inlet 71 and being buffered through the through holes and then stably sprayed out through the cooling nozzle 72, so that the water pressure stability of the cooling device 6 is further ensured, and the cooling effect is ensured.
In some examples, referring to fig. 2, 3 and 4, the cooling water spray ring 7 may include an upper half water spray ring 74 and a lower half water spray ring 75 that are opposite and independent from each other, the annular partition plate 73 includes an upper half partition plate and a lower half partition plate that are opposite, and the upper half partition plate and the lower half partition plate sequentially divide the inner cavities of the upper half water spray ring 74 and the lower half water spray ring 75 into a water inlet cavity and a water outlet cavity, and through-flow holes are respectively formed on the upper half partition plate and the lower half partition plate; the end surfaces of the two ends of the upper half water spray ring 74 are respectively provided with a first sewage outlet 741 and a second sewage outlet 742 which are communicated with the water inlet cavity and the water outlet cavity of the upper half water spray ring; the middle part of the side surface of the lower half water spray ring 75 is provided with a third sewage draining exit 751 and a fourth sewage draining exit 752 which are respectively communicated with the water inlet cavity and the water outlet cavity.
In the above embodiment, the first sewage discharge port 741 and the second sewage discharge port 742 are respectively disposed on the end surfaces of the two ends of the upper half water spray ring 74, so that each sewage discharge port is located at the lowest end of the upper half water spray ring 74, so as to flush out waste residues when the upper half water spray ring 74 is cleaned. The third and fourth discharging ports 751 and 752 are respectively provided in the middle of the side of the lower water spray ring 75 so that each discharging port is located at the lower end of the lower water spray ring 75 to facilitate the flushing of the sludge when the lower water spray ring 75 is cleaned.
Of course, in an alternative embodiment, referring to fig. 5 and 6, the cooling water spray ring may be an integrally connected whole annular water spray ring 8, the outer surface of the whole annular water spray ring 8 is provided with a water inlet 81, the water inlet 81 is communicated with the flow dividing and collecting pipe through a water supply pipeline and a regulating valve set, the inner wall of the whole annular water spray ring 8 is provided with a plurality of rows of cooling nozzles 82 which are uniformly distributed, an annular partition plate which divides the inner cavity of the whole annular water spray ring 8 into a water inlet cavity and a water outlet cavity is arranged in the whole annular water spray ring 8, the annular partition plate is an integral annular plate-shaped structure 83, the integral annular plate-shaped structure 83 divides the inner cavity of the whole annular water spray ring 8 into a water inlet cavity and a water outlet cavity; the middle position of the lower side surface of the integral annular water spraying ring 8 can be provided with a fifth sewage outlet and a sixth sewage outlet which are respectively communicated with the water inlet cavity and the water outlet cavity.
In some examples, the first sewage draining exit 741, the second sewage draining exit 742, the third sewage draining exit 751, the fourth sewage draining exit 752, the fifth sewage draining exit 85 and the sixth sewage draining exit 84 can be buckled with detachable covers; and/or the first sewage draining exit 741, the second sewage draining exit 742, the third sewage draining exit 751, the fourth sewage draining exit 752, the fifth sewage draining exit 85 and the sixth sewage draining exit 84 can be provided with sewage draining valves, so that when the cooling water spraying ring 7 needs to be cleaned, the cover body can be opened and/or the sewage draining valve can be opened for flushing, and after cleaning is finished, the cover body is closed and/or the sewage draining valve is closed. Specifically, the cover body may be screw-coupled with each drain outlet.
According to the on-line cooling system for the hot-rolled seamless steel tube, provided by the embodiment of the invention, the cooling device 6 can be arranged at the position of the roller way 2 before sizing; and/or the fixed diameter roller bed is arranged at the position of the fixed diameter roller bed 3; and/or the cooling roller way 5 is arranged, so that when the cooling device 6 is arranged at the roller way 2 before sizing, the time for the steel pipe to be heated can be reduced in a water cooling mode, and the production efficiency is improved; when the cooling device 6 is arranged at the position of the roller way 3 after sizing, the steel pipe after sizing is rapidly cooled, austenite in a work hardening state is reserved, and grain refinement in a ferrite phase transformation process is facilitated, so that the mechanical property of the steel pipe is ensured; when the cooling device 6 is arranged at the cooling roller table 5, the on-line regulation and control of the structure performance of the rolled steel tube can be realized, so that the control of the structure type, the shape and the size of the steel tube can be realized, the strengthening mechanism effects of fine grain strengthening, dislocation strengthening, phase change strengthening and the like can be achieved, and further the comprehensive performance of the steel tube is improved.
Wherein, the cooling water spray ring 7 of the cooling device 6 can be adjusted in height through the sizing front roller way 2, the sizing rear roller way 3 or the hydraulic driving device, thereby the steel pipe is centered and cooled, and the cooling effect is ensured. In addition, the inner cavity of the cooling water spray ring 7 of the cooling device 6 in the embodiment of the present invention is divided into a water inlet cavity and a water outlet cavity by the annular partition plate 73, so that the water flow in the water inlet cavity can flow into the water outlet cavity through the through-flow holes on the annular partition plate 73 and then is sprayed out by the cooling nozzle 72, thereby ensuring the stability of the spraying flow of the cooling water spray ring 7 and improving the cooling effect. In addition, the length of reposition of redundant personnel collector pipe is greater than cooling device 6's length, and when having avoided the incoming water, the unstable torrent that reposition of redundant personnel collector pipe both ends blind plate department formed causes the influence to cooling device 6's pressure to it is more stable to have guaranteed cooling device 6's pressure.
In some examples, the inner diameter of the cooling water spray ring 7 may be larger when the cooling device 6 is arranged at the pre-sizing roller table 2 than when the cooling device 6 is arranged at the post-sizing roller table 3 and when the cooling device 6 is arranged at the cooling roller table 5, to better meet the actual requirements.
In some examples, when the cooling device 6 is arranged at the roller table 2 before sizing, the number of the cooling water spraying rings 7 can be 2-8, the inner diameter can be 550-720 mm, the cooling nozzles 72 can be 4-10 rows uniformly arranged along the annular inner wall surface of the cooling water spraying rings, the water pressure adjusting range can be 0.2-0.8 Mpa, and the temperature of the steel pipe is controlled to be 20-120 ℃ through the cooling device 6, so that the intermediate temperature before sizing is reduced; when the cooling device 6 is arranged at the position of the roller bed 3 after sizing, the number of the cooling water spraying rings 7 can be 3-10, the inner diameter can be 450-660 mm, the cooling nozzles 72 can be 4-10 rows uniformly distributed along the annular inner wall surface of the cooling nozzles, the water pressure adjusting range can be 0.2-0.8 Mpa, after the steel pipe is cooled, the final cooling temperature is controlled to be reduced to 35 ℃ above the Ar3 temperature, and the starting cooling temperature is ensured to be above the Ar3 temperature when the steel pipe enters the cooling device 6 between the sizing mill 1 and the cooling bed 4; when the cooling device 6 is arranged at the cooling roller way 5, the number of the cooling water spraying rings 7 can be 30-60, the inner diameter can be 450-660 mm, the cooling nozzles 72 can be 2-8 rows uniformly distributed along the annular inner wall surface of the cooling nozzles, the water pressure adjusting range can be 0.2-0.8 Mpa, and the temperature of the cooled steel pipe is controlled to be 80-750 ℃.
In some examples, the diversion water collecting pipe is communicated with a plurality of bypass pipelines, the bypass pipelines are provided with pressure regulating valves, and outlets of the bypass pipelines are used for being communicated with the rolling grooves and used for changing the opening sizes of the bypass pipelines by adjusting the pressure regulating valves, so that the pressure of cooling water is adjusted, and the pressure of the cooling nozzles 72 of the cooling water spray ring 7 is guaranteed to be stable.
In some examples, when the cooling device 6 is arranged at the pre-sizing roller table 2, the water spraying flow rate of the upper half water spraying ring 74 and the lower half water spraying ring 75 ranges from 80m to 240m3H; when the cooling device 6 is disposed at the fixed diameter rear roller table 3, the water spraying flow ranges of the upper half water spraying ring 74 and the lower half water spraying ring 75 are 80-220 m3H; and when the cooling device 6 is arranged at the cooling roller way 5, the water spraying flow ranges of the upper half water spraying ring 74 and the lower half water spraying ring 75 are 30-180 m3H is used as the reference value. The water ratio of the upper half water spraying ring 74 to the lower half water spraying ring 75 can be 1.05-1.5. Or when the cooling device 6 is arranged at the position of the roller way 2 before sizing, the flow range of the integral annular water spraying ring 8 can be 160-480 m3The water ratio of a water inlet at the upper end of the integral annular water spraying ring 8 to a water inlet at the lower end of the integral annular water spraying ring can be 1.05-1.5; when the cooling device 6 is arranged at the position of the sizing rear roller way 3, the flow range of the integral annular water spraying ring 8 can be 160-440 m3The water ratio of a water inlet at the upper end of the integral annular water spraying ring 8 to a water inlet at the lower end of the integral annular water spraying ring can be 1.05-1.5; and when the cooling device 6 is arranged at the cooling roller way 5, the flow range of the integral annular water spraying ring 8 can be 60-360 m3And the water ratio of a water inlet at the upper end of the integral annular water spraying ring 8 to a water inlet at the lower end of the integral annular water spraying ring can be 1.05-1.5.
The embodiment of the invention also provides an arrangement method of a cooling device on an online cooling system of a hot-rolled seamless steel pipe, wherein the online cooling system of the hot-rolled seamless steel pipe is the online cooling system of the hot-rolled seamless steel pipe, and the method can comprise the following steps:
according to the outline process requirements of the hot-rolled seamless steel pipe production line, the hot-rolled seamless steel pipe is cooled by adopting one or more combination modes of arranging the cooling device 6 at the position of the roller way 2 before sizing, arranging the cooling device 6 at the position of the roller way 3 after sizing and arranging the cooling device 6 at the position of the cooling roller way 5, and the hot-rolled seamless steel pipe production line is flexible and convenient to use.
The present embodiment will be specifically described below by taking an example in which the cooling device 6 is disposed at the position of the pre-sizing roller table 2, and the cooling device 6 is disposed at the position of the pre-sizing roller table 2, the position of the post-sizing roller table 3, and the position of the cooling roller table 5.
Example 1:
according to the process requirements of production line products, a cooling device 6 is arranged on a sizing front roller way 2, the height of the cooling device 6 can be adjusted along with the height of the sizing front roller way 2, the centering cooling of the steel pipe is realized, 8 groups of circular water spraying rings are provided, and a cooling water spraying ring 7 consists of an upper water spraying ring and a lower water spraying ring which are vertically and symmetrically arranged and have the inner diameter of 650 mm; the inner surface of the water spraying ring is uniformly provided with 6 rows of cooling nozzles, the number of the single-row cooling nozzles is 52, the water pressure adjusting range of the water spraying ring is 0.2-0.8 MPa, the flow of the upper water spraying ring and the lower water spraying ring can be independently controlled, the water spraying flow range is 80-150 m3/h, and the water ratio of the upper water spraying ring and the lower water spraying ring is 1.05-1.5. The water inlet 71 has been arranged to the spray ring surface, through the supply channel, the governing valve group is connected with reposition of redundant personnel collector pipe, the governing valve group is used for realizing spray ring flow control, the reposition of redundant personnel collector pipe passes through the supply channel and the governing valve group is connected with parallel arrangement's cooling spray ring 7, the reposition of redundant personnel collector pipe is provided with a plurality of bypass pipelines, through adjusting bypass pipeline opening degree realize spouting the hydraulic adjustment of ring, guarantee cooling nozzle outlet pressure stability, reposition of redundant personnel collector pipe total length is greater than 6 length 1.5m of cooling device. The water spraying ring cavity is divided into a water inlet cavity and a water outlet cavity by an annular water stop plate, the annular water stop plate is provided with through flow holes, and the water inlet cavity and the water outlet cavity are uniformly provided with sewage discharge holes.
In the process of producing 25Mn seamless steel pipes with the outer diameter of 325mm and the wall thickness of 15mm, the temperature of the steel pipes after continuous rolling is 950-980 ℃, and sizing is required to be below 930 ℃ for ensuring the pipe type dimension of the steel pipes, so that air cooling to the target temperature is usually required to be carried out on a chain bed between the continuous rolling and a sizing mill 1(1) after the temperature is kept for 20s before the sizing of the steel pipes. And after the cooling water spray ring 7 is added before sizing, the flow, the pressure and the configuration of the cooling water spray ring 7 are set according to the temperature drop requirement of the steel pipe, so that the steel pipe can be directly sized and cooled after being cooled.
Example 2:
according to the process requirements of production line products, the cooling devices 6 are respectively arranged at the position of the roller way 3 after sizing and the position of the cooling roller way 5 between the sizing mill 1 and the cooling bed 4.
Install cooling device 6 on roll table 3 behind the sizing for 10 whole water spray ring 8, water spray ring internal diameter size is 660mm for the internal diameter size, water spray ring internal surface width direction has evenly arranged multirow cooling nozzle, be used for realizing the water spray cooling to the steel pipe surface, single row cooling nozzle quantity is at 36 ~ 70, water inlet 81 has been arranged to water spray ring surface, through the supply channel, the governing valve group is connected with the reposition of redundant personnel collector pipe, the governing valve group is used for realizing water spray ring flow control. The water pressure adjusting range of the water spraying ring is 0.2-0.8 MPa, the flow of the upper and lower spraying rings can be independently controlled, the water spraying flow range is 80-220 m3/h, and the water ratio of the upper and lower spraying rings is 1.05-1.5;
the cooling device 6 arranged at the cooling roller way 5 (inclined roller way) between the hot-rolled seamless steel tube sizing mill 1 and the cooling bed 4 consists of 42 cooling water spray rings 7, and the cooling water spray rings 7 consist of upper half water spray rings 74 and lower half water spray rings 75 which are vertically and symmetrically arranged and have the inner diameter of 600 mm; 3 rows of cooling nozzles are uniformly arranged on the inner surface of the water spraying ring, the water pressure adjusting range of the water spraying ring is 0.2-0.8 MPa, the flow of the upper and lower water spraying rings can be independently controlled, the water spraying flow range is 30-180 m3/h, the water ratio of the upper and lower water spraying rings is 1.05-1.5, the cooling device 6 is driven by a hydraulic device to realize height adjustment of the upper and lower water spraying rings, and centering cooling of the steel pipe is guaranteed.
The reposition of redundant personnel collector pipe is provided with a plurality of bypass pipelines, realize spouting the hydraulic adjustment of ring through adjusting bypass pipeline opening degree, be used for realizing cooling water pressure adjustment, guarantee cooling nozzle outlet pressure stability, the reposition of redundant personnel collector pipe total length of each position all is greater than 6 length 1.5m of position cooling device, the water spray ring cavity is separated for intake antrum and play water cavity by annular water-stop sheet, the through-flow hole has been arranged on the whole annular water-stop sheet, the blowoff hole has been put to the equipartition on intake antrum and the play water cavity.
In the process of producing the 20# steel pipe with the outer diameter of 357mm and the wall thickness of 40mm, the outlet temperature of the steel pipe is 1010 ℃, the opening quantity, the water quantity and the pressure of the cooling header of the cooling device 6 after the steel pipe is sized are adjusted, and the temperature of the steel pipe after being cooled is controlled to be 920 ℃. When the rear steel pipe is conveyed to the cooling device 6 between the sizing mill 1 and the cooling bed 4 through the roller way and the rotary arm 9, the opening temperature is 900 ℃, the opening speed of the roller way is adjusted to be 1.0m/s, the opening quantity of the water spraying rings is adjusted, the temperature of the steel pipe after being cooled is 640 ℃ through water quantity and pressure control, the steel pipe is turned over to the cooling bed 4 through the rotary arms (10, 11) and is cooled to the room temperature, and the mechanical property of the steel pipe can meet the performance requirement after the detection of the yield strength of the steel pipe, the tensile strength of 448MPa and the elongation of 34.6%. Through forced cooling after sizing, the excessive growth of austenite grains caused by high temperature is avoided, and the grain refinement in the ferrite phase transition process is facilitated, so that the mechanical property of the steel pipe is influenced, and the rolled state direct supply of thick steel pipe products is realized.
Example 3:
according to the process requirements of production line products, cooling devices 6 are respectively arranged at the position of the roller way 2 before sizing, the position of the roller way 3 after sizing and the position of a cooling roller way 5 between the sizing mill 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 which are arranged up and down symmetrically, a plurality of rows of cooling nozzles are evenly arranged on the inner surface of the water spray ring in the width direction, used for realizing water spray cooling on the outer surface of the steel pipe, the number of the single-row cooling nozzles is 36-70, the outer surface of the water spray ring is provided with a water inlet 71, the water supply pipeline and the regulating valve group are connected with the flow dividing and collecting pipe, the regulating valve group is used for realizing the flow control of the spray ring, the flow dividing and collecting pipe is provided with a plurality of bypass pipelines, the adjustment of the water pressure of the spray ring is realized by regulating the opening degree of the bypass pipelines, the water spray ring cavity is divided into a water inlet cavity and a water outlet cavity by an annular water-stop sheet, the annular water-stop sheet is provided with a through flow hole, and the water inlet cavity and the water outlet cavity are uniformly provided with sewage discharge holes.
6 groups of cooling water spray rings 7 are arranged before sizing and are installed on the sizing front roller way 2, and the height of the cooling device 6 can be adjusted along with the height of a sizing inlet roller way, so that the centering cooling of the steel pipe is realized. The cooling water spray ring 7 consists of an upper half water spray ring 74 and a lower half water spray ring 75 which are arranged up and down symmetrically and have the inner diameter of 720 mm; the inner surface of the water spraying ring is uniformly provided with 8 rows of cooling nozzles, the number of the cooling nozzles in a single row is 38, the water pressure adjusting range of the water spraying ring is 0.2-0.8 MPa, the flow of the upper half water spraying ring and the lower half water spraying ring can be independently controlled, the water spraying flow range is 80-240 m3/h, and the water ratio of the upper water spraying ring and the lower water spraying ring is 1.05-1.5.
The cooling device 6 is arranged on the sizing rear roller way 3, the height of the cooling device 6 can be adjusted along with the height of the sizing rear roller way 3 to realize centering cooling of the steel pipe, the cooling device 6 consists of 6 cooling water spray rings 7, and the cooling water spray rings 7 consist of an upper half water spray ring 74 and a lower half water spray ring 75 which are vertically and symmetrically arranged and have the inner diameter of 660 mm; the width direction of the inner surface of the water spraying ring is uniformly provided with 7 rows of cooling nozzles, the water pressure adjusting range of the water spraying ring is 0.2-0.8 MPa, the flow rate of the upper spraying ring and the lower spraying ring can be independently controlled, the water spraying flow rate range is 80-220 m3/h, and the water ratio of the upper spraying ring and the lower spraying ring is 1.05-1.5;
the cooling device 6 is arranged at a cooling roller way 5 (inclined roller way) between the hot-rolled seamless steel tube sizing mill 1 and the cooling bed 4, the cooling device 6 consists of 42 cooling water spray rings 7, and the cooling water spray rings 7 consist of upper half water spray rings 74 and lower half water spray rings 75 which are vertically and symmetrically arranged and have the inner diameter of 600 mm; 3 rows of cooling nozzles are uniformly arranged on the inner surface of the water spraying ring, the water pressure adjusting range of the water spraying ring is 0.2-0.8 MPa, the flow of the upper and lower water spraying rings can be independently controlled, the water spraying flow range is 30-180 m3/h, the water ratio of the upper and lower water spraying rings is 1.05-1.5, the cooling device 6 is driven by a hydraulic device to realize height adjustment of the upper and lower water spraying rings, and centering cooling of the steel pipe is guaranteed.
In the process of producing a Q345B steel pipe with the outer diameter of 456mm and the wall thickness of 45mm, the temperature of the steel pipe is 1090 ℃ after the steel pipe is continuously rolled, and the temperature of the steel pipe is controlled to be 1040-1060 ℃ by the cooling device 6 before sizing. After sizing, the opening number, water quantity and pressure of cooling headers of a cooling device 6 after sizing are adjusted, the cold temperature of the steel pipe is controlled to be 960 ℃, when the steel pipe is transported to the cooling device 6 between the sizing mill 1 and a cooling bed 4 through a roller way and a rotary arm 9, the cold opening temperature is 940 ℃, the opening number of water spraying rings is adjusted by adjusting the running speed of the roller way to be 1.0m/s, the cold temperature of the steel pipe is controlled to be 630 ℃ through the water quantity and pressure, the steel pipe is turned to the cooling bed 4 through the rotary arms (10, 11) and cooled to the room temperature, the mechanical property of the steel pipe meets the performance requirement after detection, the yield strength of the steel pipe is 362MPa, the tensile strength of 523MPa and the elongation of the steel pipe is 28.7%, and the rolled state direct supply of thick.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. An online cooling system for a hot-rolled seamless steel pipe, comprising:
the sizing device comprises a sizing front roller way, a sizing rear roller way, a cooling roller way and a cooling device, wherein the sizing front roller way and the sizing rear roller way are respectively positioned in front of and behind a sizing mill, and the cooling roller way and the cooling device are positioned between a cooling bed and the sizing mill;
the cooling device is arranged at the position of the roller way before sizing, and the height of the cooling device can be adjusted along with the height of the roller way before sizing; and/or the cooling device is arranged at the position of the sizing roller way, and the height of the cooling device can be adjusted along with the height of the sizing roller way; and/or the cooling device is arranged at the cooling roller way, and the height of the cooling device is adjusted by a hydraulic driving device;
the cooling device comprises a plurality of cooling water spraying rings arranged along the conveying direction of the roller way;
the outer surface of the cooling water spray ring is provided with a water inlet which is communicated with a shunting water collecting pipe through a water supply pipeline and an adjusting valve group, the shunting water collecting pipe is arranged in parallel with the cooling device, and the length of the shunting water collecting pipe is greater than that of the cooling device;
the inner wall of the cooling water spray ring is provided with a plurality of rows of cooling nozzles which are uniformly distributed, an annular partition plate which divides the inner cavity of the cooling water spray ring into a water inlet cavity and a water outlet cavity is arranged in the cooling water spray ring, through-flow holes are formed in the annular partition plate, the water inlet cavity and the water outlet cavity are communicated through the through-flow holes, and the flow rate and the pressure stability of cooling water sprayed out of the cooling nozzles of the cooling water spray ring are controlled by the flow rate of the water inlet and the arrangement form and the size of the through-flow holes in the annular partition plate;
the cooling water spray ring comprises an upper half water spray ring and a lower half water spray ring which are opposite and independent to each other; or the cooling water spray ring is an integrally communicated integral annular water spray ring;
the annular partition plate comprises an upper half partition plate and a lower half partition plate which are opposite, the upper half partition plate and the lower half partition plate sequentially and respectively divide the inner cavities of the upper half water spray ring and the lower half water spray ring into a water inlet cavity and a water outlet cavity, and the upper half partition plate and the lower half partition plate are respectively provided with the through flow holes; or the annular partition plate is of an integral annular plate-shaped structure, the inner cavity of the integral annular water spraying ring is divided into the water inlet cavity and the water outlet cavity by the integral annular plate-shaped structure, and the through flow hole is formed in the integral annular plate-shaped structure;
the end surfaces of the two ends of the upper half water spray ring are respectively provided with a first sewage discharge port and a second sewage discharge port which are communicated with the water inlet cavity and the water outlet cavity of the upper half water spray ring, and the middle part of the side surface of the lower half water spray ring is provided with a third sewage discharge port and a fourth sewage discharge port which are respectively communicated with the water inlet cavity and the water outlet cavity of the lower half water spray ring; or a fifth sewage draining outlet and a sixth sewage draining outlet which are respectively communicated with the water inlet cavity and the water outlet cavity are arranged in the middle of the side surface of the lower part of the integral annular water spraying ring;
the first sewage draining port, the second sewage draining port, the third sewage draining port, the fourth sewage draining port, the fifth sewage draining port and the sixth sewage draining port are all buckled with detachable cover bodies; and/or a drain valve is arranged at each of the first drain outlet, the second drain outlet, the third drain outlet, the fourth drain outlet, the fifth drain outlet and the sixth drain outlet.
2. The on-line cooling system for a hot-rolled seamless steel pipe according to claim 1,
when the cooling device is arranged at the position of the roller way before sizing, the inner diameter of the cooling water spray ring is larger than that when the cooling device is arranged at the position of the roller way after sizing and when the cooling device is arranged at the position of the cooling roller way, the inner diameter of the cooling water spray ring is larger than that of the cooling water spray ring.
3. The on-line cooling system for a hot-rolled seamless steel pipe according to claim 1,
when the cooling device is arranged at the position of the roller way before sizing, the number of the cooling water spray rings is 2-8, the inner diameter is 550-720 mm, the cooling nozzles are 4-10 rows which are uniformly distributed along the annular inner wall surface of the cooling nozzles, the water pressure adjusting range is 0.2-0.8 Mpa, and the flow ranges of the upper half water spray ring and the lower half water spray ring are 80-240 m3The water ratio of the upper half water spray ring to the lower half water spray ring is 1.05-1.5; or the flow range of the integral annular water spray ring is 160-480 m3The water ratio of a water inlet at the upper end of the integral annular water spraying ring to a water inlet at the lower end of the integral annular water spraying ring is 1.05-1.5;
when the cooling device is arranged at the position of the roller way after sizing, the number of the cooling water spraying rings is 3-10, the inner diameter is 450-660 mm, the cooling nozzles are 4-10 rows uniformly distributed along the annular inner wall surface of the cooling nozzles, and the water pressure adjusting range is 0.2-0.8 Mpa; the flow ranges of the upper half water spray ring and the lower half water spray ring are both 80-220 m3The water ratio of the upper half water spray ring to the lower half water spray ring is 1.05-1.5; or the flow range of the integral annular water spray ring is 160-440 m3The water ratio of a water inlet at the upper end of the integral annular water spraying ring to a water inlet at the lower end of the integral annular water spraying ring is 1.05-1.5;
when the cooling device is arranged at the cooling roller way, the number of the cooling water spray rings is 30-60, the inner diameter is 450-660 mm, the cooling nozzles are uniformly arranged in 2-8 rows along the annular inner wall surface of the cooling nozzles, the water pressure adjusting range is 0.2-0.8 Mpa, and the flow ranges of the upper half water spray ring and the lower half water spray ring are both 30-180 m3The water ratio of the upper half water spray ring to the lower half water spray ring is 1.05-1.5; or, the flow range of the integral annular water spray ring is 60-360 m3And h, the water ratio of a water inlet at the upper end of the integral annular water spraying ring to a water inlet at the lower end of the integral annular water spraying ring is 1.05-1.5.
4. The on-line cooling system for a hot-rolled seamless steel pipe according to claim 1,
the shunting water collecting pipe is communicated with a plurality of bypass pipelines, pressure regulating valves are arranged on the bypass pipelines, and outlets of the bypass pipelines are used for being communicated with the rolling ditches.
5. The on-line cooling system for a hot-rolled seamless steel pipe according to claim 1,
the length of the diversion water collecting pipe is at least 1.5m greater than that of the cooling device.
6. A method of arranging a cooling device on an in-line cooling system for a hot-rolled seamless steel pipe, wherein the in-line cooling system for a hot-rolled seamless steel pipe is the in-line cooling system for a hot-rolled seamless steel pipe according to any one of claims 1 to 5, the method comprising:
according to the outline process requirements of the hot-rolled seamless steel pipe production line, the hot-rolled seamless steel pipe is cooled by adopting one or more combination modes of arranging the cooling device at the position of the roller way before sizing, arranging the cooling device at the position of the roller way after sizing and arranging the cooling device at the position of the cooling roller way.
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| CN202010356564.4A CN111589885A (en) | 2020-04-29 | 2020-04-29 | Online cooling system for hot-rolled seamless steel pipe and arrangement method of cooling device on online cooling system |
| PCT/CN2021/078670 WO2021218357A1 (en) | 2020-04-29 | 2021-03-02 | On-line cooling system for hot-rolled seamless steel tube, and arrangement method for cooling device on on-line cooling system |
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|---|---|---|---|---|
| CN112378166A (en) * | 2020-11-16 | 2021-02-19 | 灵璧久工精密钢管制造有限公司 | Cooling device for seamless steel tube machining and using method thereof |
| WO2021218357A1 (en) * | 2020-04-29 | 2021-11-04 | 东北大学 | On-line cooling system for hot-rolled seamless steel tube, and arrangement method for cooling device on on-line cooling system |
| CN114440044A (en) * | 2021-12-28 | 2022-05-06 | 河北华丰能源科技发展有限公司 | Cooling device convenient to dismouting |
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| CN114622080B (en) * | 2022-03-10 | 2023-11-24 | 云南曲靖钢铁集团凤凰钢铁有限公司 | Fine control smelting system for steelmaking seamless steel pipe |
| CN114961612A (en) * | 2022-06-09 | 2022-08-30 | 西藏电建成勘院工程有限公司 | A coring device for geological exploration |
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| CN101829679B (en) * | 2009-03-09 | 2013-09-04 | 鞍钢股份有限公司 | Production method for producing shock toughness of pipe coupling material of hot rolled oil well |
| CN202438554U (en) * | 2011-12-31 | 2012-09-19 | 湖北新冶钢有限公司 | Controlled rolling and controlled cooling system for large-diameter thick-walled seamless steel pipe |
| CN105170662B (en) * | 2015-07-20 | 2017-10-17 | 东北大学 | The controllable spray thrower of Multicarity flow |
| JP6561909B2 (en) * | 2016-05-13 | 2019-08-21 | Ｊｆｅスチール株式会社 | ERW steel pipe manufacturing method |
| CN206153302U (en) * | 2016-10-25 | 2017-05-10 | 东北大学 | Hot -rolling seamless pipe on -line control cooling arrangement |
| CN106269931B (en) * | 2016-10-25 | 2018-04-06 | 东北大学 | A kind of method of hot rolled seamless steel tube on-line continuous cooling |
| CN111589885A (en) * | 2020-04-29 | 2020-08-28 | 东北大学 | Online cooling system for hot-rolled seamless steel pipe and arrangement method of cooling device on online cooling system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218357A1 (en) * | 2020-04-29 | 2021-11-04 | 东北大学 | On-line cooling system for hot-rolled seamless steel tube, and arrangement method for cooling device on on-line cooling system |
| CN112378166A (en) * | 2020-11-16 | 2021-02-19 | 灵璧久工精密钢管制造有限公司 | Cooling device for seamless steel tube machining and using method thereof |
| CN112378166B (en) * | 2020-11-16 | 2021-12-28 | 灵璧久工精密钢管制造有限公司 | Cooling device for seamless steel tube machining and using method thereof |
| CN114440044A (en) * | 2021-12-28 | 2022-05-06 | 河北华丰能源科技发展有限公司 | Cooling device convenient to dismouting |
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