CN114178309A - Controlled cooling method and device for hot-rolled ribbed steel bar - Google Patents
Controlled cooling method and device for hot-rolled ribbed steel bar Download PDFInfo
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- CN114178309A CN114178309A CN202111354069.0A CN202111354069A CN114178309A CN 114178309 A CN114178309 A CN 114178309A CN 202111354069 A CN202111354069 A CN 202111354069A CN 114178309 A CN114178309 A CN 114178309A
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- ribbed steel
- water
- cooling
- steel bar
- roller brush
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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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
- B21B45/04—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 de-scaling, e.g. by brushing
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- Mechanical Engineering (AREA)
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to a controlled cooling device for hot-rolled ribbed steel bars, which comprises an atomization channel, wherein the ribbed steel bars horizontally move along the atomization channel, an atomization extrusion device is arranged on a traveling path, the atomization extrusion device is used for carrying out atomization cooling and extrusion on the surfaces of the ribbed steel bars, the outlet of the atomization channel is communicated with the inlet of a water cooling pipeline, a roller brush device is arranged at the outlet of the water cooling pipeline, the roller brush device is used for carrying out roller brush operation on the surfaces of the ribbed steel bars, the hot-rolled ribbed steel bars are led out into the atomization channel, the atomization extrusion device is used for carrying out atomization cooling and extrusion on the surfaces of the ribbed steel bars, primary treatment on the hot-rolled ribbed steel bars is realized, the hot-rolled ribbed steel bars are led out to the water cooling pipeline, and the oxide layer on the surfaces of the steel bars is reliably removed through the roller brush device, the device can ensure the cooling effect of the hot-rolled ribbed steel bars and simultaneously reduce the oxide layer on the surfaces of the hot-rolled ribbed steel bars, the later reliable use of the ribbed steel bar is facilitated.
Description
Technical Field
The invention relates to the technical field of metal processing, in particular to a method and a device for controlling cooling of hot-rolled ribbed steel bars.
Background
In recent years, with the vigorous development of capital construction in our country, the consumption of hot-rolled ribbed steel bars is the first worldwide for a long time, and the yield of hot-rolled ribbed steel bars in our country is always between 40 and 50 percent of the total yield of steel products for a long time. The main difficulty lies in that the closed circular tempered martensite structure is not allowed to appear on the base circle of the hot rolled steel bar, and the difference value of the Vickers hardness of the edge part and the core part is less than or equal to 40HV when the fine grain structure in the metallographic structure or the unclosed ring caused by quick cooling is adopted.
The traditional cooling path of the hot-rolled steel bar mainly uses large cooling speed and long-time cooling as main modes, so that the strict requirements of the new national standard on metallographic structures are difficult to meet, the cooling path of the high-strength hot-rolled steel bar at present mainly uses air cooling, and the cooling control is also carried out on the steel bar in a water cooling or atomization cooling mode, however, when the atomization or water cooling equipment is used for cooling the ribbed steel bar led out by a hot rolling mill, the ribbed steel bar is easy to generate an oxide layer, and the oxide layer has certain influence on the later use of the ribbed steel bar after being finished, so that the existing cooling of the ribbed steel bar needs to be improved.
Disclosure of Invention
The invention aims to: the method and the device for controlling the cooling of the hot-rolled ribbed steel bar can ensure the cooling effect of the hot-rolled ribbed steel bar, reduce the oxide layer on the surface of the hot-rolled ribbed steel bar and facilitate the later reliable use of the ribbed steel bar.
The technical problem to be solved in the invention is as follows:
the utility model provides a hot rolling ribbed steel bar accuse cold charge is put, includes the atomizing passageway, ribbed steel bar along horizontal migration and be provided with atomizing extrusion equipment on the route of marcing in the atomizing passageway, atomizing extrusion equipment implements atomizing cooling and extrusion on ribbed steel bar surface, the export of atomizing passageway and the import intercommunication of water-cooling pipeline, the exit position of water-cooling pipeline is provided with roller brush equipment, roller brush equipment is used for implementing the roller brush operation on ribbed steel bar surface.
The invention also has the following technical characteristics:
the water-cooling pipeline is horizontally arranged, water circulation equipment is arranged in the water-cooling pipeline, and the water circulation equipment is used for guiding circulating cooling water into the water-cooling pipeline.
The atomizing passageway adult is the tubulose structure of horizontal arrangement, the one end of atomizing passageway is the horn mouth form, and the feed end is the jumbo size end, atomizing extrusion equipment contains the extrusion head that sets up in atomizing passageway one end position, the extrusion head implements the extrusion to ribbed steel bar, the outer wall of extrusion head is provided with atomizer, atomizer sets up a plurality ofly along ribbed steel bar circumference.
The extrusion head is arranged on a horizontal driving mechanism, the horizontal driving mechanism drives the extrusion head to move along the length direction of the ribbed steel bar, the horizontal driving mechanism is connected with a rotating mechanism, and the rotating mechanism drives the extrusion head to rotate along the circumferential direction of the ribbed steel bar.
The extrusion head is including setting up a plurality of extrusion sheaves in atomizing passageway feed end position, extrusion sheave wheel core is perpendicular with atomizing passageway length direction, extrusion sheave rotary type sets up on the wheel carrier, the wheel carrier articulates and sets up on the extrusion ring, the extrusion ring is arranged with atomizing passageway tube core is concentric, the articulated shaft of wheel carrier is parallel with the wheel core of extrusion sheave, the wheel carrier is connected with the unit of stirring, stirs the unit drive wheel carrier and rotates around the articulated shaft.
Stir the unit including stirring the slat, stir the slat and arrange along atomizing passageway length direction, be provided with the thumb wheel on the wheel carrier, the wheel core of thumb wheel is parallel with the articulated shaft of wheel carrier, it stirs the sand grip to be provided with on the slat to stir, stir the sand grip and stir the slat perpendicular and along length direction equidistant a plurality of arranging, the thumb wheel supports with stirring the slat and lean on.
The wheel carrier is fixed with one end of a reset tension spring, the other end of the reset tension spring is connected with the extrusion ring, and a bulge is arranged in the circumferential direction of the groove cavity of the extrusion grooved wheel.
The extrusion ring is arranged on a horizontal sliding rod in a sliding mode, the horizontal sliding rod is arranged along the length direction of the atomization channel, rotating rings are arranged at two ends of the horizontal sliding rod, the horizontal driving mechanism comprises a horizontal rodless cylinder connected with the rotating rings, and the horizontal rodless cylinder is arranged along the length direction of the atomization channel.
Stir slat one end and be connected with rotatory cover, rotatory ways is established outside the atomizing passageway and is arranged with one heart, rotary mechanism is including setting up the rotating gear outside rotatory cover, rotating gear and power gear meshing, power gear is connected with power motor's pivot.
The rotary sleeve rotary type sets up on supporting the frame, the rotary sleeve passes through the support bearing rotary type and sets up on supporting the frame, motor power fixes on supporting the frame.
The two sides of the rotating ring are respectively provided with a poking ball, the poking balls are respectively arranged on a poking rod, the poking rod is arranged along the axial direction of the rotating sleeve, and one end of the poking rod is connected with a piston rod of the horizontal rodless cylinder.
The water-cooling pipeline and the atomizing channel are arranged concentrically, the water circulation equipment comprises a first circulation water jacket arranged at a feed inlet of the water-cooling pipeline, a second circulation water jacket is arranged at a discharge outlet of the water-cooling pipeline, a water outlet of the first circulation water jacket is provided with a water inlet communicated with a high-pressure water source, and the atomization channel is communicated with the water inlet of the water-cooling pipeline.
The pipe cavity diameter of the first circulation water jacket and the second circulation water jacket is larger than the diameter of the water cooling pipeline, one end pipe orifice of the first circulation water jacket and the second circulation water jacket is in a closing-up shape and is provided with a sleeve in an extending mode, the ribbed steel bars pass through the sleeve in the sleeve, the inner wall of the sleeve is provided with a deformation sealing ring, and the deformation sealing ring is sealed with the outer wall of the ribbed steel bars in a laminating mode.
The deformation sealing washer is the column structure, the center of deformation sealing washer constitutes the passageway that the ribbed steel bar passed, set up the strip opening on the sleeve pipe, the strip opening is arranged and is set up a plurality ofly along sleeve pipe circumferential direction interval along sleeve pipe length direction, the sleeve pipe outer wall is provided with the clamp.
The roller brush equipment is including setting up the roller brush pipe at the exit position of water-cooling pipeline, roller brush pipe arranges with the water-cooling pipeline is concentric, the one end extension of roller brush pipe is provided with roller brush piece, roller brush piece sets up a plurality ofly along roller brush pipe circumference direction, roller brush pipe is rotatory and horizontal migration along water-cooling pipeline length extending direction.
The roller brush pipe slides and is arranged in the supporting sleeve, one end of the roller brush pipe is rotatably arranged on the roller brush support, and when the roller brush pipe moves along the supporting sleeve, the roller brush pipe is positioned on the roller brush support and rotates.
The inner wall of the supporting sleeve is provided with a spiral groove, the spiral groove extends along the length direction of the supporting sleeve, the outer wall of the roller brush tube extends to be provided with a deflector rod, and the deflector rod extends into the spiral groove in a protruding mode.
A method for controlling cooling of hot-rolled ribbed steel bars, comprising the steps of:
firstly, guiding the ribbed steel bar guided out by the hot rolling mill into an atomization channel, and starting atomization extrusion equipment to carry out atomization cooling and extrusion on the surface of the ribbed steel bar;
secondly, arranging a water cooling pipeline at the outlet of the atomization channel to lead the ribbed steel bars after atomization cooling out of the water cooling pipeline;
thirdly, starting water circulation equipment in the water-cooling pipeline to form a cooling water channel in the water-cooling pipeline and cooling the ribbed steel bars;
and fourthly, starting roller brushing equipment at the discharging position of the water cooling pipeline to clean the oxide layer on the surface of the ribbed steel bar.
The temperature of the ribbed steel bar led out by the hot rolling mill is controlled to be 1080-1140 ℃, the heat preservation time is 80-100 min, the austenite grain growth is effectively controlled, and the initial rolling temperature is controlled to be 1050-1080 ℃;
the pressure in the atomizing channel is controlled to be 0.4-1.5 MPa.
The cooling speed range of the atomizing channel is controlled to be 15-25 ℃/s; the cooling speed range of the water cooling pipeline is controlled to be 5-15 ℃/s.
Compared with the prior art, the invention has the beneficial effects that: the device is when using, hot rolling ribbed steel bar is derived in to the atomizing passageway, atomizing extrusion equipment through setting up on the atomizing passageway implements atomizing cooling and the extrusion on ribbed steel bar surface, realize getting rid of the primary cooling and the surface oxide layer of hot rolling ribbed steel bar, and lead out to the water-cooling pipeline with hot rolling ribbed steel bar after the primary cooling, carry out the secondary cooling, implement the roller brush operation on ribbed steel bar surface through roller brush equipment, can effectively get rid of the reliable of the surperficial oxide layer of the ribbed steel bar after the cooling, when the device can ensure hot rolling ribbed steel bar cooling effect, reduce the oxide layer that hot rolling ribbed steel bar surface appears, make things convenient for the reliable use in ribbed steel bar later stage.
Drawings
FIG. 1 and FIG. 2 are schematic diagrams of two kinds of view structures of the cooling control device for hot-rolled ribbed steel bars
FIG. 3 is a front view of a cooling control apparatus for hot rolled ribbed steel bar;
FIG. 4 is a schematic view and FIG. 5 is a schematic view of an atomizing channel and an atomizing extrusion device from two viewing angles;
FIGS. 6 and 7 are schematic views of the atomizing channel and atomizing extrusion device from two viewing angles after the atomizing channel and atomizing extrusion device are removed from the housing;
FIG. 8 is a schematic view of a portion of the configuration of the atomizing channel and one end of the atomizing extrusion apparatus;
FIG. 9 is a schematic structural view of a water cooling pipeline and a water circulation device;
FIG. 10 is a schematic view of the construction of the roll brush apparatus;
fig. 11 is a front view of the roll brush apparatus.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention will now be described in detail with reference to the following examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed. As used herein, the terms "parallel" and "perpendicular" are not limited to their strict geometric definitions, but include tolerances for machining or human error legitimacy and inconsistency:
the cooling control device for hot rolled ribbed steel bars of the present invention will be described in detail with reference to the accompanying drawings 1 to 11:
the utility model provides a hot rolling ribbed steel bar accuse cold charge is put, includes atomizing passageway 100, ribbed steel bar along horizontal migration and be provided with atomizing extrusion equipment 200 on the route of marcing in atomizing passageway 100, atomizing extrusion equipment 200 is implemented and is provided with atomizing cooling and extrusion on ribbed steel bar surface, atomizing passageway 100's export and water-cooling pipeline 300's import intercommunication, water-cooling pipeline 300's exit position is provided with roller brush equipment 400, roller brush equipment 400 is used for implementing the roller brush operation on ribbed steel bar surface.
The device is when using, hot rolling ribbed steel bar is derived in atomizing passageway 100, atomizing extrusion equipment 200 through setting up on atomizing passageway 100 implements atomizing cooling and the extrusion on ribbed steel bar surface, realize getting rid of the primary cooling and the surperficial oxide layer of hot rolling ribbed steel bar, and lead out the hot rolling ribbed steel bar after the primary cooling to water-cooling pipeline 300, carry out the secondary cooling, implement the roller brush operation on ribbed steel bar surface through roller brush equipment 400, can effectively get rid of the reliable of the oxide layer on ribbed steel bar surface after the cooling, the device can ensure when hot rolling ribbed steel bar cooling effect, reduce the oxide layer that hot rolling ribbed steel bar surface appears, make things convenient for the reliable use in ribbed steel bar later stage.
As a preferred embodiment of the present invention, the water-cooled pipeline 300 is horizontally arranged, a water circulation device 500 is disposed in the water-cooled pipeline 300, and the water circulation device 500 is used for introducing circulating cooling water into the water-cooled pipeline 300.
The water circulation device 500 makes the water cooling pipe 300 filled with cooling circulation water, so that the hot rolled ribbed steel bar can be reliably contacted with the cooling water, and reliable cooling of the hot rolled ribbed steel bar is ensured.
Specifically, the adult is the tubular structure of horizontal arrangement of atomizing passageway 100, the one end of atomizing passageway 100 is the horn mouth form, and the feed end is the jumbo size end, atomizing extrusion equipment 200 contains the extrusion head 210 that sets up in atomizing passageway 100 one end position, the extrusion head 210 implements the extrusion to the ribbed steel bar, the outer wall of extrusion head 210 is provided with atomizer 220, atomizer 220 sets up a plurality ofly along ribbed steel bar circumference.
When carrying out the preliminary atomizing cooling to the ribbed reinforcing bar after pricking heat, ribbed reinforcing bar passes through extrusion head 210 to leading-in from atomizing channel 100 one end, under extrusion head 210's extrusion, the extrusion of implementation to atomizing cooling ribbed reinforcing bar surface oxide layer is rubbed, and the cooling atomized water that atomizer 220 jetted out can reliably realize the cooling to ribbed reinforcing bar, thereby ensures the preliminary cooling and the processing on ribbed reinforcing bar surface.
When the atomization cooling and kneading of the hot-rolled ribbed steel bar are implemented, the extrusion head 210 is arranged on a horizontal driving mechanism, the horizontal driving mechanism drives the extrusion head 210 to move along the length direction of the ribbed steel bar, the horizontal driving mechanism is connected with a rotating mechanism, and the rotating mechanism drives the extrusion head 210 to rotate along the circumferential direction of the ribbed steel bar.
When the atomization cooling and kneading of the hot-rolled ribbed steel bar are implemented, the rotating mechanism drives the extrusion head 210 to rotate along the circumferential direction of the ribbed steel bar to implement the cooling and kneading of the ribbed steel bar, and the horizontal driving mechanism drives the extrusion head 210 to move along the length direction of the ribbed steel bar, so that the cooling and kneading time of the ribbed steel bar can be effectively prolonged, and the cooling and kneading effects of the ribbed steel bar can be effectively increased.
The extrusion head 210 comprises a plurality of extrusion grooved wheels 211 arranged at the feeding end of the atomization channel 100, the wheel centers of the extrusion grooved wheels 211 are perpendicular to the length direction of the atomization channel 100, the rotary type extrusion grooved wheels are arranged on a wheel frame 212, the wheel frame 212 is hinged on an extrusion ring 213, the extrusion ring 213 and the tube centers of the atomization channel 100 are concentrically arranged, the hinging shaft of the wheel frame 212 is parallel to the wheel centers of the extrusion grooved wheels 211, the wheel frame 212 is connected with a toggle unit, and the toggle unit drives the wheel frame 212 to rotate around the hinging shaft.
When the ribbed steel bar is cooled and kneaded, the toggle unit drives the wheel carrier 212 to rotate around the hinge shaft, so that the extrusion grooved wheel 211 realizes discontinuous kneading operation on the ribbed steel bar, and the kneading effect on the steel bar can be effectively improved.
Specifically, when implementing to stir extrusion sheave 211, stir the unit including stir slat 214, stir slat 214 and arrange along atomizing passageway 100 length direction, be provided with on the wheel carrier 212 and stir wheel 2121, the wheel core of stir wheel 2121 is parallel with the articulated shaft of wheel carrier 212, it stirs sand grip 2141 to be provided with on the stir slat 214, stir sand grip 2141 and stir slat 214 perpendicular and along length direction equidistant a plurality of arrangements, stir wheel 2121 and stir slat 214 support and lean on.
When the toggle wheel 2121 moves along the length direction of the toggle strip 214, the toggle wheel 2121 abuts against or separates from the toggle protrusion 2141, and then the toggle protrusion 2141 is toggled to swing, so as to perform hammering on the oxide layer on the surface of the ribbed steel bar, and the oxide layer is more convenient to fall off.
Preferably, the wheel frame 212 is fixed to one end of a return tension spring 215, the other end of the return tension spring 215 is connected to the pressing ring 213, and a protrusion is disposed in a circumferential direction of the groove cavity of the pressing sheave 211.
More preferably, the pressing ring 213 is slidably disposed on a horizontal sliding rod 216, the horizontal sliding rod 216 is disposed along the length direction of the atomization channel 100, both ends of the horizontal sliding rod 216 are provided with rotating rings 217, the horizontal driving mechanism comprises a horizontal rodless cylinder 218 connected with the rotating rings 217, and the horizontal rodless cylinder 218 is disposed along the length direction of the atomization channel 100.
The horizontal rodless cylinder 218 is activated to slide the extrusion ring 213 along the horizontal sliding rod 216, so that the extrusion sheave 211 and the atomizer 220 move along the length direction of the ribbed steel bar, and the cooling and kneading of the ribbed steel bar are performed.
In order to implement the rotation in the horizontal movement process of the extrusion ring 213, one end of the toggle strip 214 is connected with the rotary sleeve 219, the rotary sleeve 219 is sleeved outside the atomization channel 100 and is concentrically arranged, the rotary mechanism comprises a rotary gear 2191 arranged outside the rotary sleeve 219, the rotary gear 2191 is meshed with a power gear 2192, and the power gear 2192 is connected with a rotating shaft of a power motor 2193.
When the power motor 2193 is started, the rotating sleeve 219 rotates to drive the extrusion ring 213 and the atomizing nozzle 220 to rotate, so as to rub the ribbed steel bars and perform atomizing cooling.
More specifically, the rotary sleeve 219 is rotatably disposed on the support frame 2194 via a support bearing, and the power motor 2193 is fixed to the support frame 2194.
More preferably, in order to ensure that the reciprocating movement of the rotating ring 217 along the length direction of the atomizing passage 100 is performed, both sides of the rotating ring 217 are respectively provided with the toggle balls 2171, the toggle balls 2171 are respectively provided on the toggle rods 2172, and the toggle rods 2172 are arranged along the axial direction of the rotating sleeve 219 and have one end connected to the piston rod of the horizontal rodless cylinder 218.
The toggle ball 2171 is abutted against two side faces of the rotating ring 217, so that the rotating ring 217 can be driven to reciprocate, and the normal rotation of the rotating ring 217 is not influenced.
In the ribbed steel bar size after the atomizing cooling leads to water-cooling pipeline 300, water-cooling pipeline 300 arranges with atomizing passageway 100 is concentric, water circle equipment 500 is including setting up the first circulation water jacket 510 in water-cooling pipeline 300 feed inlet position, water-cooling pipeline 300 discharge gate position is provided with second circulation water jacket 520, first circulation water jacket 510 delivery port, second circulation water jacket 520 is provided with water inlet and high-pressure water source intercommunication.
The water outlet of the first circulating water jacket 510 and the second circulating water jacket 520 form a closed pipeline for the water-cooling pipeline 300, so that the water-cooling pipeline 300 is filled with cooling water, and the surface of the hot tear reinforcing steel bar is reliably cooled.
More specifically, the lumen diameter of first circulation water jacket 510 and second circulation water jacket 520 is greater than the diameter of water-cooling pipeline 300, the one end mouth of pipe of first circulation water jacket 510 and second circulation water jacket 520 is for closing up form and extend and be provided with the sleeve pipe, and the ribbed steel bar passes through from the cover intraductal, the intraductal wall of cover is provided with deformation sealing washer 530, deformation sealing washer 530 and the laminating of ribbed steel bar outer wall are sealed.
More specifically, deformation sealing washer 530 is the column structure, the center of deformation sealing washer 530 constitutes the passageway that the ribbed steel bar passed, set up the strip opening on the sleeve pipe, the strip opening is arranged and is set up a plurality ofly along sleeve pipe circumferential direction interval along sleeve pipe length direction, the sleeve pipe outer wall is provided with clamp 540.
The clamp 540 clamps the channel, and further clamps the deformed sealing ring 530, so that the deformed sealing ring 530 is reliably sealed with the surface of the ribbed steel bar, and the water-cooled pipe 300 forms a closed pipe.
More specifically, after the ribbed steel bar after the cooling is derived from the one end of water-cooling pipeline 300, roller brush equipment 400 is including setting up roller brush pipe 410 at the exit position of water-cooling pipeline 300, roller brush pipe 410 and water-cooling pipeline 300 are arranged concentrically, the one end extension of roller brush pipe 410 is provided with roller brush piece 420, roller brush piece 420 sets up a plurality ofly along roller brush pipe 410 circumferential direction, roller brush pipe 410 is rotatory and horizontal migration along water-cooling pipeline 300 length extending direction.
When the roller brush pieces 420 are arranged in a plurality along the circumferential direction of the roller brush pipe 410, and the roller brush pipe 410 rotates and moves horizontally along the length extension direction of the water cooling pipeline 300, the rubbing on the surface of the ribbed steel bar can be effectively realized, and the oxide layer on the surface of the ribbed steel bar can be removed.
More specifically, when the horizontal movement and rotation of the roller brush tube 410 are performed, the roller brush tube 410 is slidably disposed in the support sleeve 430, one end of the roller brush tube 410 is rotatably disposed on the roller brush support 440, and the roller brush tube 410 is positioned on the roller brush support 440 to rotate when the roller brush tube 410 moves along the support sleeve 430.
Specifically, the roller brush bracket 440 is connected with a piston rod of an electric cylinder, a spiral groove 431 is formed in the inner wall of the support sleeve 430, the spiral groove 431 extends along the length direction of the support sleeve 430, a deflector rod 411 extends from the outer wall of the roller brush tube 410, and the deflector rod 411 protrudes into the spiral groove 431.
After the electric cylinder is started, the roller brush tube 410 is positioned in the support sleeve 430 to be in a rotating and horizontally driving state, so that the cleaning operation of the surface of the ribbed steel bar is ensured.
A method for controlling cooling of hot-rolled ribbed steel bars, comprising the steps of:
firstly, guiding the ribbed steel bar guided out by the hot rolling mill into an atomization channel 100, and starting atomization and extrusion equipment 200 to carry out atomization cooling and extrusion on the surface of the ribbed steel bar;
secondly, arranging a water cooling pipeline 300 at the outlet of the atomizing channel 100, so that the atomized and cooled ribbed steel bars are led out of the water cooling pipeline 300;
thirdly, starting the water circulation equipment 500 in the water-cooling pipeline 300 to form a cooling water channel in the water-cooling pipeline 300 and cooling the ribbed steel bars;
and fourthly, starting the roller brush equipment 400 at the discharging position of the water cooling pipeline 300 to clean the oxide layer on the surface of the ribbed steel bar.
The temperature of the ribbed steel bar led out by the hot rolling mill is controlled to be 1080-1140 ℃, the heat preservation time is 80-100 min, the austenite grain growth is effectively controlled, and the initial rolling temperature is controlled to be 1050-1080 ℃;
the pressure in the atomizing channel 100 is controlled to be 0.4-1.5 MPa.
The cooling speed range of the atomizing channel 100 is controlled to be 15-25 ℃/s; the cooling speed range of the water cooling pipeline 300 is controlled to be 5-15 ℃/s.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A controlled cooling method for hot-rolled ribbed steel bars is characterized by comprising the following steps: the controlled cooling method of the hot-rolled ribbed steel bar comprises the following steps:
firstly, guiding the ribbed steel bar guided out by the hot rolling mill into an atomization channel (100), and starting atomization extrusion equipment (200) to carry out atomization cooling and extrusion on the surface of the ribbed steel bar;
secondly, arranging a water cooling pipeline (300) at the outlet of the atomizing channel (100) to lead the atomized and cooled ribbed steel bars out of the water cooling pipeline (300);
thirdly, starting water circulation equipment (500) in the water-cooling pipeline (300) to form a cooling water channel in the water-cooling pipeline (300) and cooling the ribbed steel bars;
and fourthly, starting roller brush equipment (400) at the discharging position of the water cooling pipeline (300) to clean the oxide layer on the surface of the ribbed steel bar.
2. A method of controlled cooling of hot rolled ribbed steel bar as claimed in claim 1 wherein: the temperature of the ribbed steel bar led out by the hot rolling mill is controlled to be 1080-1140 ℃, the heat preservation time is 80-100 min, the austenite grain growth is effectively controlled, and the rolling temperature is controlled to be 1050-1080 ℃.
3. A method of controlled cooling of hot rolled ribbed steel bar as claimed in claim 1 wherein: the pressure in the atomizing channel (100) is controlled to be 0.4-1.5 MPa.
4. A method of controlled cooling of hot rolled ribbed steel bar as claimed in claim 1 wherein: the cooling speed range of the atomizing channel (100) is controlled to be 15-25 ℃/s; the cooling speed range of the water cooling pipeline (300) is controlled to be 5-15 ℃/s.
5. The utility model provides a hot rolling ribbed steel bar accuse cold charge is put which characterized in that: including atomizing passageway (100), ribbed steel bar along horizontal migration and be provided with atomizing extrusion equipment (200) on the route of marcing in atomizing passageway (100), atomizing extrusion equipment (200) are implemented and are taken the atomizing cooling and the extrusion on ribbed steel bar surface, the export of atomizing passageway (100) and the import intercommunication of water-cooling pipeline (300), the exit position of water-cooling pipeline (300) is provided with roller brush equipment (400), roller brush equipment (400) are used for implementing the roller brush operation on ribbed steel bar surface.
6. The cold control device for hot-rolled ribbed steel bar according to claim 5, characterized in that: the water-cooling pipeline (300) is horizontally arranged, water circulation equipment (500) is arranged in the water-cooling pipeline (300), and the water circulation equipment (500) is used for guiding in circulating cooling water into the water-cooling pipeline (300).
7. The cold control device for hot-rolled ribbed steel bar according to claim 6, characterized in that: the atomizing channel (100) is of a horizontally arranged tubular structure, one end of the atomizing channel (100) is of a bell mouth shape, the feeding end of the atomizing channel is of a large-size end, the atomizing and extruding equipment (200) comprises an extruding head (210) arranged at one end of the atomizing channel (100), the extruding head (210) extrudes the ribbed steel bars, atomizing nozzles (220) are arranged on the outer wall of the extruding head (210), and a plurality of atomizing nozzles (220) are arranged along the circumferential direction of the ribbed steel bars; the extrusion head (210) is arranged on a horizontal driving mechanism, the horizontal driving mechanism drives the extrusion head (210) to move along the length direction of the ribbed steel bar, the horizontal driving mechanism is connected with a rotating mechanism, and the rotating mechanism drives the extrusion head (210) to rotate along the circumferential direction of the ribbed steel bar.
8. The cold control device for hot-rolled ribbed steel bar according to claim 7, characterized in that: the extrusion head (210) comprises a plurality of extrusion sheaves (211) arranged at the feed end of the atomization channel (100), the wheel cores of the extrusion sheaves (211) are vertical to the length direction of the atomization channel (100), the extrusion sheaves (211) are rotatably arranged on a wheel frame (212), the wheel frame (212) is hinged on an extrusion ring (213), the extrusion ring (213) and the tube core of the atomization channel (100) are concentrically arranged, the hinge shaft of the wheel frame (212) is parallel to the wheel cores of the extrusion sheaves (211), the wheel frame (212) is connected with a toggle unit, and the toggle unit drives the wheel frame (212) to rotate around the hinge shaft; the toggle unit comprises toggle strips (214), the toggle strips (214) are arranged along the length direction of the atomizing channel (100), toggle wheels (2121) are arranged on the wheel carriers (212), wheel cores of the toggle wheels (2121) are parallel to hinged shafts of the wheel carriers (212), toggle convex strips (2141) are arranged on the toggle strips (214), the toggle convex strips (2141) are perpendicular to the toggle strips (214) and are arranged at equal intervals along the length direction, and the toggle wheels (2121) abut against the toggle strips (214); the wheel carrier (212) is fixed with one end of a reset tension spring (215), the other end of the reset tension spring (215) is connected with the extrusion ring (213), and a bulge is arranged in the circumferential direction of a groove cavity of the extrusion grooved wheel (211); the extrusion ring (213) is arranged on a horizontal sliding rod (216) in a sliding manner, the horizontal sliding rod (216) is arranged along the length direction of the atomization channel (100), both ends of the horizontal sliding rod (216) are provided with rotating rings (217), the horizontal driving mechanism comprises a horizontal rodless cylinder (218) connected with the rotating rings (217), and the horizontal rodless cylinder (218) is arranged along the length direction of the atomization channel (100); one end of the toggle strip plate (214) is connected with a rotary sleeve (219), the rotary sleeve (219) is sleeved outside the atomization channel (100) and is concentrically arranged, the rotary mechanism comprises a rotary gear (2191) arranged outside the rotary sleeve (219), the rotary gear (2191) is meshed with a power gear (2192), and the power gear (2192) is connected with a rotating shaft of a power motor (2193); the rotary sleeve (219) is rotatably arranged on the support rack (2194), the rotary sleeve (219) is rotatably arranged on the support rack (2194) through a support bearing, and the power motor (2193) is fixed on the support rack (2194); poking balls (2171) are respectively arranged on two sides of the rotating ring (217), the poking balls (2171) are respectively arranged on poking rods (2172), the poking rods (2172) are arranged along the axial direction of the rotating sleeve (219), and one end of each poking rod is connected with a piston rod of the horizontal rodless cylinder (218).
9. The hot rolled ribbed bar controlled cooling apparatus of claim 8, wherein: the water cooling pipeline (300) and the atomizing channel (100) are arranged concentrically, the water circulation equipment (500) comprises a first circulation water jacket (510) arranged at a feed inlet of the water cooling pipeline (300), a second circulation water jacket (520) is arranged at a discharge outlet of the water cooling pipeline (300), a water outlet of the first circulation water jacket (510) is formed, and a water inlet of the second circulation water jacket (520) is communicated with a high-pressure water source; the diameters of the tube cavities of the first circulating water jacket (510) and the second circulating water jacket (520) are larger than the diameter of the water cooling pipeline (300), the tube openings at one ends of the first circulating water jacket (510) and the second circulating water jacket (520) are closed and are provided with sleeves in an extending mode, ribbed steel bars pass through the sleeves, the inner walls of the sleeves are provided with deformation sealing rings (530), and the deformation sealing rings (530) are in fit sealing with the outer walls of the ribbed steel bars; deformation sealing washer (530) are the column structure, the center of deformation sealing washer (530) constitutes the passageway that the ribbed steel bar passed, set up the strip opening on the sleeve pipe, the strip opening is arranged and is set up a plurality ofly along sleeve pipe circumferential direction interval along sleeve pipe length direction, the sleeve pipe outer wall is provided with clamp (540).
10. The hot rolled ribbed bar controlled cooling apparatus of claim 9, wherein: the roller brush equipment (400) comprises roller brush pipes (410) arranged at the outlet positions of the water cooling pipelines (300), the roller brush pipes (410) and the water cooling pipelines (300) are arranged concentrically, a plurality of roller brush sheets (420) are arranged at one end of each roller brush pipe (410) in an extending mode, the roller brush sheets (420) are arranged along the circumferential direction of the roller brush pipes (410), and the roller brush pipes (410) rotate and horizontally move along the length extending direction of the water cooling pipelines (300); the roller brush tube (410) is arranged in the supporting sleeve (430) in a sliding mode, one end of the roller brush tube (410) is rotatably arranged on the roller brush bracket (440), and when the roller brush tube (410) moves along the supporting sleeve (430), the roller brush tube (410) is located on the roller brush bracket (440) to rotate; the inner wall of the supporting sleeve (430) is provided with a spiral groove (431), the spiral groove (431) extends along the length direction of the supporting sleeve (430), the outer wall of the roller brush tube (410) extends to be provided with a deflector rod (411), and the deflector rod (411) protrudes into the spiral groove (431).
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Cited By (1)
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| CN114178309B (en) | 2022-09-30 |
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