CN112139282A - Strip steel coiling system, high-strength steel coiling method and high-strength steel production line - Google Patents

Abstract

The invention relates to a strip steel coiling system, a high-strength steel coiling method based on the strip steel coiling system and a high-strength steel production line adopting the strip steel coiling system. The bending machine can straighten the strip steel at the initial coiling stage so as to avoid damaging the strip threading guide plate, and can generate plastic deformation at the final coiling stage so as to provide post tension for coiling and reduce the rebound force of the outer ring strip steel; the auxiliary compression roller can enable the strip steel to be attached to the winding drum/steel coil when the strip steel is coiled, the coiling effect of the strip steel is improved, and the problems that the strip steel bulges near a jaw when high-strength steel and other steel types are coiled can be avoided.

Description

Strip steel coiling system, high-strength steel coiling method and high-strength steel production line

Technical Field

The invention relates to a strip steel coiling system, a high-strength steel coiling method based on the strip steel coiling system and a high-strength steel production line adopting the strip steel coiling system.

Background

The market of high-strength steel is gradually expanded, in order to improve the productivity of equipment, the high-strength strip steel is gradually expanded from the previous single-sheet plate production to the continuous production direction, in order to adapt to flexible and changeable production modes, the high-strength strip steel is coiled into a difficult point, and the following problems are mainly solved:

1) the high-strength steel is difficult to bend, the tape threading guide plate is greatly damaged by head warping or head lowering, and the tape threading guide plate is difficult to automatically enter particularly when a jaw is fed;

2) when the jaw clamps the strip steel and the strip steel is just coiled, because full tension cannot be established, 50% tension coiling can be adopted generally, high-strength steel is difficult to attach to a winding drum at the moment, and a bag can be bulged particularly near the jaw, so that the steel coil can be a convex circle and can not be a perfect circle, and the control precision of the coiled tension is reduced;

3) when the last circle is coiled, the tail of the strip steel loses the post tension because the tail of the strip steel is cut off, and the last circles of uncoiling can be caused by high-strength rebound;

4) when the coil is removed after coiling, the high-strength steel has high resilience, so that the strip steel can be clamped in the jaw after resilience and is difficult to remove the coil when the jaw is opened;

5) the resilience force of the last circle of the steel coil is very large, especially the high-strength steel of a thick plate, the band steel is difficult to bundle, even if the bundle is finished, the bundling band is easily cut off by a band head in the hoisting and transporting processes, the coil is scattered, and the danger of accidents is caused.

Disclosure of Invention

The invention relates to a strip steel coiling system, a high-strength steel coiling method based on the strip steel coiling system and a high-strength steel production line adopting the strip steel coiling system, which can at least solve part of defects in the prior art.

The invention relates to a strip steel coiling system, which comprises a coiling machine, a steering pinch roll and a coil unloading car, wherein the steering pinch roll is connected with the coiling machine through a strip penetrating guide plate, a bending machine is arranged on the material supply side of the steering pinch roll, at least one auxiliary compression roll is arranged around a winding drum of the coiling machine, the axial direction of the auxiliary compression roll is parallel to the axial direction of the winding drum, and the auxiliary compression roll is provided with an auxiliary compression roll driving unit so as to have a working position which is in rolling contact with a steel coil and a standby position which is far away from the steel coil.

In one embodiment, the auxiliary pressing roller is provided in plurality and arranged in sequence along the circumferential direction of the web.

In one embodiment, the working positions of the auxiliary pressing rollers are distributed between 6 o 'clock and 12 o' clock positions of the steel coil.

In one embodiment, the coil stripper car is provided with a carrier roller adapted to be in rolling contact with a steel coil, and when the carrier roller is in contact with the steel coil and each auxiliary pressing roller is in the working position, the carrier roller and each auxiliary pressing roller are combined to form a winding roller assisting set.

As an embodiment, the working position of one of the auxiliary pressure rollers is located near the initial position of the nip of the roll.

In one embodiment, the threading guide plate comprises an upper guide plate and a lower guide plate which are respectively arranged at the upper side and the lower side of the steel wire, and the upper guide plate and the lower guide plate are respectively connected with a guide plate driving unit.

In one embodiment, the end of the upper guide plate is provided with a guide pressure roller.

In one embodiment, the upper guide plate and the lower guide plate are both telescopic guide plates.

The invention also relates to a high-strength steel coiling method, which adopts the strip steel coiling system to coil high-strength strip steel, and comprises the following steps:

a. at the initial coiling stage, straightening the strip steel by using the bending machine, and guiding the strip steel to a winding drum through the steering pinch roll and the strip threading guide plate;

the jaw of the winding drum clamps the strip steel, the diameter of the winding drum is expanded to establish initial tension, when the jaw sequentially passes through the working positions of the auxiliary compression rollers, the auxiliary compression rollers correspondingly press the strip steel to the winding drum, and after a plurality of circles of the strip steel are wound, the winding machine establishes full tension operation;

b. and at the final coiling stage, the strip steel is bent by using the bending machine, and the auxiliary compression rollers and the carrier rollers on the coil stripping car are combined to form a coil assisting roller set to assist in finishing the coiling of the strip tail.

The invention also relates to a high-strength steel production line which comprises an uncoiler, a high-strength steel processing system and the strip steel coiling system, wherein the bending machine is arranged at the downstream of the high-strength steel processing system and is connected with the high-strength steel processing system.

The invention has at least the following beneficial effects:

the strip steel can be straightened at the initial coiling stage by arranging the bending machine, (1) the strip steel is prevented from being warped or low-headed to damage a strip threading guide plate, and the strip steel, particularly high-strength steel, can smoothly and accurately enter the jaw of the winding drum; (2) in the final coiling stage, as the sheared strip tail is free and has no tension, the strip steel is bent by the bending machine to generate plastic deformation to generate energy consumption, so that the strip steel can provide back tension for coiling; meanwhile, the strip steel is plastically deformed by the bending machine, the elastic curvature reducing diameter of the strip steel from the bending machine is slightly larger than the radius of the currently coiled steel coil, and therefore after the strip steel is coiled, the rebound force of the strip steel on the outer ring can be greatly reduced, and subsequent operations such as bundling of the steel coil are facilitated. Through the auxiliary compression roller, the band steel can be attached to the winding drum/steel coil when being coiled, the coiling effect of the band steel is improved, and the problems that the high-strength steel and other steel types bulge near the jaw when being coiled can be avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view showing a state of a strip coiling system in an initial coiling stage according to an embodiment of the present invention;

FIG. 2 is a schematic view of a strip coiling system provided in an embodiment of the present invention in a state at the last coiling stage;

FIG. 3 is a schematic structural view of a take-up nip according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a layout of a strip steel conditioning system according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a quenching cooling apparatus provided in an embodiment of the invention;

fig. 6 is a schematic view of an operating state of the cooling mechanism according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.

Example one

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a strip steel coiling system, including a coiler, a steering pinch roller 2 and a coil stripping car 6, where the steering pinch roller 2 is engaged with the coiler through a strip guide, a bending machine 3 is disposed on a feeding side of the steering pinch roller 2, at least one auxiliary pressure roller 5 is disposed around a winding drum 1 of the coiler, an axial direction of the auxiliary pressure roller 5 is parallel to an axial direction of the winding drum 1, and the auxiliary pressure roller 5 is configured with a driving unit of the auxiliary pressure roller 5 so as to have a working position in rolling contact with a steel coil 7 and a standby position far away from the steel coil 7.

The recoiling machine, the steering pinch roll 2 and the coil stripping car 6 are conventional equipment in the field, and the specific structure is not described herein.

The existing equipment capable of bending the strip steel is suitable for the embodiment. In a preferred embodiment, as shown in fig. 1 and 2, the bending machine 3 includes a housing and a plurality of bending rollers disposed in the housing, a portion of the bending rollers are disposed above the strip steel running channel, the other bending rollers are disposed below the strip steel running channel, and each bending roller is disposed along the strip steel running direction in a staggered manner and is respectively connected to a lifting driving mechanism. The bending operation and the bending degree of the strip steel can be controlled by controlling the height position of each bending roller; particularly, the bending amount of the strip steel at the corresponding position is controlled by controlling the height position of each bending roller, so that the aim of straightening the strip steel can be fulfilled. In this embodiment, a 4-roll bending machine 3 is adopted, and two bending rolls are respectively arranged above and below the strip steel running channel.

The auxiliary pressure roller 5 driving unit is preferably driven by a hydraulic cylinder, and may be a mode of driving the auxiliary pressure roller 5 to swing to switch between the working position and the standby position, or a mode of driving the auxiliary pressure roller 5 to move linearly to switch between the working position and the standby position; in the embodiment, the latter mode is adopted, namely the auxiliary compression roller 5 makes linear motion between the working position and the standby position, so that the pressing effect on the strip steel is better; further, the auxiliary pressing roller 5 makes a linear motion direction along the radial direction of the winding drum 1, that is, the extension line of the motion path of the auxiliary pressing roller 5 passes through the axis of the winding drum 1, and along with the change of the diameter of the steel coil 7, the pressing position of the auxiliary pressing roller 5 can be ensured to be kept unchanged, thereby being convenient for accurate control.

In a preferred scheme, as shown in fig. 1 and fig. 2, the auxiliary pressing rollers 5 are multiple and are sequentially arranged along the circumferential direction of the winding drum 1, and obviously, the auxiliary winding effect can be further improved by adopting the multiple auxiliary pressing rollers 5, so that the strip steel is more attached to the winding drum 1. In one embodiment, as shown in fig. 1 and fig. 2, the working position of each auxiliary pressing roller 5 is distributed between the 6 o ' clock position and the 12 o ' clock position of the steel coil 7, and since the coil discharging car 6 is generally arranged below the 6 o ' clock position of the steel coil 7, the auxiliary pressing rollers 5 need to avoid the position or one of the auxiliary pressing rollers 5 is arranged on the coil discharging car 6; the above solution is particularly suitable for the upper roll-up mode. Of course, for the lower winding scheme, the arrangement position of each auxiliary pressing roller 5 may also be designed accordingly, for example, the working position of each auxiliary pressing roller 5 is distributed between the 9 o 'clock position and the 3 o' clock position of the steel coil 7.

Alternatively, the working position of one of the auxiliary pressing rollers 5 is located near the initial position of the nip of the winding drum 1, for example, for the case of the upper winding scheme and the working positions of the respective auxiliary pressing rollers 5 are distributed between the 6 o ' clock and 12 o ' clock positions of the steel coil 7, the working position of one of the auxiliary pressing rollers 5 may be designed to be located at the 12 o ' clock position of the steel coil 7. The strip steel can be attached to the winding drum 1/the steel coil 7 during winding, and the problems of bulging and the like near the jaw during winding of steel grades such as high-strength steel and the like can be avoided.

Particularly, the coil discharging vehicle 6 is provided with a carrier roller which is suitable for rolling contact with a steel coil 7, and when the carrier roller is in contact with the steel coil 7 and each auxiliary press roller 5 is in a working position, the carrier roller and each auxiliary press roller 5 are combined to form an auxiliary roller group; in the final coiling stage, the auxiliary roller groups can be formed by the auxiliary rollers 5 and the carrier rollers on the coil stripping car 6 to assist in finishing the coiling of the tail of the strip, so that the auxiliary roller groups have the function of a coil wrapper.

And the strip threading guide plate is used for guiding the strip to the coiling machine at the initial coiling stage and the final coiling stage. In one embodiment, as shown in fig. 1 and 2, the threading guide plate includes an upper guide plate 41 and a lower guide plate 42 respectively arranged at the upper and lower sides of the steel wire, and the upper guide plate 41 and the lower guide plate 42 are respectively connected with a guide plate driving unit; the steel strip design steel wire is the steel strip steel wire between the steering pinch roll 2 and the winding drum 1 during normal winding, namely a steel strip running channel which is expected to be formed between the steering pinch roll 2 and the winding drum 1; the guide plate driving unit can adopt conventional hydraulic cylinders and other driving devices, and the specific guide plate driving mode is conventional in the field and is not described herein. The upper guide plate 41 and the lower guide plate 42 are matched to limit the upper surface and the lower surface of the strip steel respectively, a guide crack can be formed between the upper surface and the lower surface, the strip steel can be accurately guided to a coiling machine, and especially for coiling high-strength steel, the coiling difficulty caused by the shape problem of the high-strength steel plate can be solved to a certain extent. Further preferably, as shown in fig. 1 and 2, a guiding press roll (not shown) is provided at the end of the upper guide plate 41, so that the strip steel can be attached to the lower guide plate 42 as much as possible, thereby facilitating the coiling of the strip steel, and particularly, the high-strength strip steel can be smoothly and accurately guided to the jaw of the reel 1 at the initial coiling stage. Optionally, the upper guide plate 41 and the lower guide plate 42 are both telescopic guide plates, so that after the strip steel is clamped by the upper guide plate 41 and the lower guide plate 42, the upper guide plate and the lower guide plate can synchronously move forward along with the strip steel through the extension operation of the upper guide plate and the lower guide plate, and the clamping and guiding effect on the strip steel is ensured.

According to the strip steel coiling system provided by the embodiment of the invention, the bending machine 3 is arranged, (1) the strip steel can be straightened at the initial coiling stage, the strip steel is prevented from warping or lowering head to damage a strip threading guide plate, and the strip steel, especially high-strength steel, can smoothly and accurately enter the jaw of the winding drum 1; (2) in the final coiling stage, as the sheared strip tail is free and has no tension, the strip steel is bent by the bending machine 3 to generate plastic deformation to generate energy consumption, so that the strip steel can provide back tension for coiling; meanwhile, the strip steel is plastically deformed by the bending machine 3, the elastic curvature reducing diameter of the strip steel from the bending machine 3 is slightly larger than the radius of the currently coiled steel coil 7, and therefore after the strip steel coil 7 is coiled, the rebound force of the strip steel on the outer ring can be greatly reduced, and the subsequent operations of bundling and the like of the steel coil 7 are facilitated. Through setting up supplementary compression roller 5, can make belted steel paste on reel 1/coil of strip 7 when coiling, improve belted steel's the batch effect, can avoid near the swell scheduling problem of keeping silent when steel grades such as high-strength steel batch.

Example two

The embodiment of the invention provides a winding jaw which can be used on the winding drum 1 in the first embodiment and is used as the jaw of the winding drum 1.

As shown in fig. 3, the jaw includes a sector plate 11, a groove is formed on the sector plate 11, a fixed jaw plate 12 is disposed at a groove wall on one side of the groove, a movable jaw plate 13 and a jaw driving unit 14 for driving the movable jaw plate 13 to approach or be away from the fixed jaw plate 12 are disposed in the groove, an outlet guide plate 15 is disposed at a groove wall on the other side of the groove, a jaw steel surface of the fixed jaw plate 12 is disposed obliquely, and an outer end of the jaw steel surface is located at a side of an inner end of the fixed jaw plate, which is close to the outlet guide plate 15, and an outer surface of the outlet guide plate 15 is an arc-shaped guide surface and a space enclosed by the fixed jaw plate 12 is gradually expanded from inside to outside.

Preferably, the jaw driving unit 14 is a hydraulic cylinder, and a hydraulic jaw is adopted, so that a large clamping force can be increased, on one hand, the initial coiling tension of the strip steel, especially the high-strength steel, can be met, and on the other hand, the depth of the strip head entering the jaw can be reduced, so that the rebound force of the strip steel, especially the high-strength steel, is reduced, and the situation that the strip head protrudes out of the coil is avoided. Alternatively, as shown in fig. 3, the jaw driving unit 14 is fixedly installed at the bottom of the groove.

In one embodiment, a plurality of saw teeth are formed on the jaw steel surface of the movable jaw plate 13, and it is further preferable to design the jaw steel surface of the movable jaw plate 13 to be a saw tooth surface; the steel surface of the serrated jaw can increase the friction force between the serrated jaw and the strip steel, and the jaw effect on the strip steel is improved.

Optionally, the steel surface of the fixed jaw plate 12 is smooth, so that the strip head can be more easily discharged from the jaw during the coil stripping process. The sawtooth-shaped jaw steel surface of the movable jaw plate 13 is matched, so that reliable clamping of strip steel is guaranteed, and meanwhile, coil stripping operation of a coiling machine is facilitated.

Understandably, after the strip is clamped by the fixed jaw plate 12 and the movable jaw plate 13 in a matching way, the strip is discharged from the jaws through the outlet guide plate 15 and is wound on the winding drum 1; the outer surface of the outlet guide plate 15 is used for contacting and supporting the strip steel; the jaw steel face of the fixed jaw plate 12 inclines towards the groove wall at the other side of the groove, the jaw steel face and the groove bottom of the groove enclose a formed space to form a triangular space gradually expanding from inside to outside, and the outlet guide plate 15 gradually bulges towards the side of the groove opening from the groove bottom of the groove, so that strip steel can be smoothly attached to the outlet guide plate 15. Based on the structure, the design of the outlet guide plate 15 ensures that the strip steel does not have larger bending, turning and the like as much as possible when the strip steel is discharged from the jaw, thereby reducing the plastic deformation when the strip steel is discharged from the jaw, preventing the strip steel from being broken due to the generation of cracks on the surface of the strip steel, reducing the resilience of the strip steel and reducing the difficulty of discharging the strip steel from the jaw.

Further preferably, the arc-shaped guide surface comprises a first arc segment and a second arc segment which have different curvatures, the second arc segment has the same curvature as the outer surface of the adjacent sector plate 11 and is smoothly spliced, and the first arc segment is spliced at the other end of the second arc segment (i.e. the end close to the fixed jaw plate 12); based on the structure, the strip steel of the jaw can be smoothly attached to the sector plate 11/the winding drum 1.

To facilitate the arrangement of the jaw driving unit 14 and the exit guide plate 15, the exit guide plate 15 may be grooved to accommodate the jaw driving unit 14; or two groups of jaw driving units 14 are arranged, and the two groups of jaw driving units 14 are respectively arranged at two ends of the outlet guide plate 15; and other arrangements, which are not described in detail herein.

EXAMPLE III

The embodiment of the invention provides a high-strength steel coiling method, which adopts the strip steel coiling system provided by the first embodiment to coil high-strength strip steel, and comprises the following steps:

a. as shown in fig. 1, in the initial winding stage, the strip steel is straightened by the bending machine 3, the strip steel is prevented from being warped or falling to damage a strip threading guide plate, and the strip steel, especially high-strength steel, can smoothly and accurately enter a jaw of a winding drum 1; the specific straightening operation has been described in the first embodiment above and will not be described in detail here.

Guiding the strip to the reel 1 through the steering pinch roll 2 and the threading guide plate, which is a conventional operation in the field and is not described in detail;

the jaw of the winding drum 1 clamps the strip steel, the diameter of the winding drum 1 is expanded to establish initial tension, and when the jaw sequentially passes through the working positions of the auxiliary compression rollers 5, the auxiliary compression rollers 5 correspondingly press the strip steel to the winding drum 1, so that the coiling machine can ensure the fitting effect of the strip steel coiling without a full tension state. After a plurality of circles of strip steel are coiled (preferably 3-5 circles), the coiling machine is operated in full tension;

b. as shown in fig. 2, at the final coiling stage, the strip steel is bent by the bending machine 3; because the sheared strip tail is free and has no tension, the strip steel is bent by the bending machine 3 to generate plastic deformation to generate energy consumption, and the back tension can be provided for coiling; meanwhile, the strip steel is plastically deformed by the bending machine 3, the elastic curvature reducing diameter of the strip steel from the bending machine 3 is slightly larger than the radius of the currently coiled steel coil 7, and therefore, after the strip steel is coiled, the rebound force of the strip steel on the outer ring can be greatly reduced, and the subsequent operations of bundling and the like on the steel coil 7 are facilitated.

Specifically, when the decoiling signal is received, the threading guide is in place (for the above-described structure including the upper guide 41 and the lower guide 42, only the lower guide 42 may be raised), the pinch rolls are pressed down, and the strip steel is bent by the bending machine 3; and after the cutting operation of the cutting scissors is finished, the coiling machine continues to coil to finish the coiling of the strip tail. Preferably, each auxiliary pressing roller 5 and the carrier roller on the coil discharging car 6 are combined to form a coil assisting roller set to assist in completing the coiling of the strip tail, that is, each auxiliary pressing roller 5 is pressed against the steel coil 7, the coil discharging car 6 ascends until the carrier roller is contacted with the steel coil 7, and the coil assisting device formed by each auxiliary pressing roller 5 and the carrier roller can effectively prevent the strip tail from rebounding in a tension-free state.

Understandably, in the normal coiling process, each auxiliary press roll 5 is in a standby position, the strip threading guide plate is also in an idle position, the pinch roll is opened, and the bending machine 3 is opened. When the operation of coil stripping is finished, after the coil stripping car 6 contacts the strip steel, the jaw is opened, the reel 1 is reduced in diameter by 20 percent and then rotates forward by 45 degrees, after the head of the strip is taken out of the jaw, the diameter is increased again and then reduced to the minimum coil diameter, and then coil stripping is carried out.

Example four

The embodiment of the invention provides a high-strength steel production line which comprises an uncoiler, a high-strength steel processing system and a strip steel coiling system provided by the first embodiment, wherein the bending machine 3 is arranged at the downstream of the high-strength steel processing system and is connected with the high-strength steel processing system.

In one embodiment, the high-strength steel processing system is used for quenching and tempering high-strength strip steel.

As shown in fig. 4, the present embodiment provides a strip steel quenching and tempering system, which can be used as the above high-strength steel processing system, and includes a strip steel quenching device and a strip steel tempering device, where the strip steel quenching device includes a quenching heating section and a quenching cooling section 817 sequentially arranged along a running direction of the strip steel, and the quenching heating section includes a first longitudinal induction heating furnace section 812, a transverse induction heating furnace section 813, and a first soaking furnace section 815 sequentially arranged along the running direction of the strip steel; the strip steel tempering device comprises a tempering heating section and a tempering cooling section which are sequentially arranged along the running direction of strip steel, wherein the tempering heating section comprises a second longitudinal magnetic induction heating furnace section 832 and a second soaking furnace section 834 which are sequentially arranged along the running direction of the strip steel; a temperature straightening device 82 is arranged between the quenching cooling section 817 and the tempering heating section.

The first longitudinal magnetic induction heating furnace section 812 may adopt a longitudinal magnetic induction heating device conventional in the art, and the transverse magnetic induction heating furnace section 813 may adopt a transverse magnetic induction heating device conventional in the art, for example, a "transverse magnetic line induction heating device with a variable magnetic circuit width" disclosed in CN01117018.2, for example, a "wide-width induction heating device for uniformly heating strip steel" disclosed in CN201410011044.4, and specific structures thereof are not described herein again. In this embodiment, in the first longitudinal magnetic induction heating furnace section 812, the power supply system adopts a 10khz power frequency IGBT power supply technology, the inductor adopts a single-turn whole plate induction coil technology, specifically, the cavity is sealed by a muffle furnace structure in the inductor coil, and the cavity sealing device adopts a double-layer sealing sleeve structure technology; in above-mentioned transverse magnetic induction heating furnace section 813, 1khz power frequency IGBT power technology is chooseed for use to electrical power generating system, and the inductor adopts multiturn induction coil technique, specifically realizes the cavity through the muffle furnace structure in the inductor coil and seals, and cavity sealing device adopts double-deck seal cover structure technique. Preferably, in the first longitudinal magnetic induction heating furnace section 812, the temperature of the strip steel is rapidly increased from the normal temperature to 700 ℃, so that the rapid heating is realized and the high comprehensive thermal efficiency is ensured; in the transverse magnetic induction heating furnace section 813, the strip steel is heated from 700 ℃ to 950 ℃ to realize rapid and efficient heating after Curie temperature point.

The first soaking furnace section 815 can heat and equalize the temperature of the quenched and heated strip steel, thereby realizing austenitization and heat preservation of the strip steel, effectively improving the performance of the strip steel and promoting the consistency of the performance of the strip steel; preferably, an electric radiation heating pipe is arranged in the first soaking furnace section 815, and a good soaking and heat preservation effect can be achieved by adopting an electric radiation pipe heating technology; the electromagnetic induction heating technology and the electric radiant tube heating technology are adopted to realize rapid quenching heating and heat preservation soaking, the length of a quenching heating furnace section can be greatly reduced, the length of the furnace section above 1/2 is saved, and intensive short-flow production is realized. Further preferably, a circulating fan for enhancing disturbance of furnace gas is further arranged in the first soaking furnace section 815, so that temperature uniformity in the furnace section can be improved, and operating energy consumption can be reduced.

Similarly, the second longitudinal magnetic induction heating furnace section 832 may adopt a longitudinal magnetic induction heating device which is conventional in the art, and the detailed structure thereof is not described herein. In this embodiment, in above-mentioned second vertical magnetic induction heating furnace section 832, 10khz power frequency IGBT power technology is chooseed for use to electrical power generating system, and the inductor adopts single circle whole board induction coil technique, specifically realizes the cavity through the muffle furnace structure in the inductor coil and seals, and cavity sealing device adopts double-deck seal cover structure technique. The second longitudinal magnetic induction heating furnace section 832 can realize rapid tempering heating of the strip steel before 700 ℃, and specifically can realize low-temperature tempering (150-250 ℃), medium-temperature tempering (350-500 ℃) and high-temperature tempering (650-700 ℃) according to tempering process requirements.

The second soaking furnace section 834 can heat and homogenize the tempered strip steel, and improve the uniformity of the organization and carbide precipitation in the width direction of the strip steel, thereby improving the performance uniformity of strip steel products. Preferably, an electric radiation heating pipe is arranged in the second soaking furnace section 834, and a good soaking and heat preservation effect can be achieved by adopting an electric radiation pipe heating technology; the electromagnetic induction heating technology and the electric radiant tube heating technology are adopted to realize rapid tempering heating and heat preservation soaking, the length of a tempering heating furnace section can be greatly reduced, the length of the furnace section above 1/2 is saved, and intensive short-flow production is realized. Further preferably, a circulating fan used for enhancing disturbance of furnace gas is further arranged in the second soaking furnace section 834, so that temperature uniformity in the furnace section can be improved, and operating energy consumption is reduced.

The temperature straightening device 82 can straighten and level the plate shape of the quenched strip steel, improve the tempering and tempering quality of the subsequent strip steel, and avoid the further deterioration of the poor plate shape in the tempering and tempering process, thereby improving the final strip steel tempering and tempering quality. The temperature straightening device 82 can adopt one or more of a tension straightening machine, a roller straightening machine and a tension roller straightening machine; in one embodiment, the shape of the quenched steel strip can be straightened and leveled from a 20I level to a 10I level.

Further preferably, the quenching cooling section 817 is connected with the temperature straightening device 82, and the temperature straightening device 82 is connected with the tempering heating section through a strip steel roller conveyor, so that the strip steel quenching and tempering system is a continuous quenching and tempering line, and the efficiency and the yield of strip steel quenching and tempering can be remarkably improved.

Further optimize above-mentioned belted steel guenching unit, the quenching heating section still includes first edge heating furnace section 814, first edge heating furnace section 814 arrange in transverse magnetic induction heating furnace section 813 with between the first soaking furnace section 815, first edge heating furnace section 814 includes two sets of first edge heating mechanism that are used for heating belted steel limit portion, and two sets of first edge heating mechanism branch are listed in furnace body transmission side and operation side. By arranging the first edge heating furnace section 814 behind the first longitudinal magnetic induction heating furnace section 812 and the transverse magnetic induction heating furnace section 813, the edge temperature difference area of the strip steel generated by the combined heating of the longitudinal magnetic induction heating and the transverse magnetic induction heating can be supplemented with heat, so that the condition of temperature nonuniformity in the width direction of the strip steel is reduced or avoided, the quenching quality of the strip steel is obviously improved, the uniform precipitation consistency of the tissue and carbide in the width direction of the strip steel is improved, and the performance consistency of the product in the width direction is ensured.

The first edge heating mechanism preferably also adopts a magnetic induction heating technology, and specifically, the first edge heating mechanism comprises a first edge magnetic induction heater arranged on the corresponding side of the furnace body and a first magnetic shielding structure for limiting the magnetic field of the first edge magnetic induction heater to the corresponding edge of the strip steel. The first magnetic shielding structure selectively shields part of the magnetic field, and the part of the magnetic field is allowed to extend along a set direction, so that the magnetic field can act on the edge area to be heated of the strip steel, and the direction of the magnetic field is consistent with a preset direction, for example, the heating is carried out along the width direction or the length direction of the strip steel. Through the magnetic field regulating ability of the first edge magnetic induction heater and the selective shielding effect cooperation of the first magnetic shielding structure, better magnetic field regulating ability can be obtained, and the magnetic induction heating effect with specified direction and specified intensity is realized. The first magnetic shielding structure can be, for example, a magnetic field shielding case and a magnetic field channel is formed on the magnetic field shielding case, and in another embodiment, the first magnetic shielding structure comprises a first shielding copper plate arranged on the corresponding side of the furnace body, the plate surface of the first shielding copper plate is parallel to the running direction of the strip steel, and obviously, the first shielding copper plate is arranged at a position which enables the magnetic field of the first edge magnetic induction heater to act on the edge area to be heated of the strip steel. In a preferred embodiment, the magnetic field width constrained by the first magnetic shielding structure is 45-60 mm, preferably about 50mm, that is, one side boundary for supplementing heat to the strip steel edge is the strip steel edge, and the other side boundary is 45-60 mm away from the strip steel edge, so that the temperature difference region at the strip steel edge can be better covered. In an alternative, the first edge electromagnetic induction heater may be driven by a moving trolley to be close to or far from a strip steel running channel, so as to switch the first edge electromagnetic induction heater between a working state and a standby state, and adjust a target magnetic field acting position of the first edge electromagnetic induction heater according to a specific working condition, wherein: if the first magnetic shielding structure is static shielding, different edge width ranges of strip steel can be heated by driving the first edge electromagnetic induction heater to move, or strip steel heating operation with different width specifications can be adapted; if the first magnetic shielding structure is dynamic shielding, the width and/or direction of the constrained magnetic field can be adjusted, and the movement of the first edge electromagnetic induction heater is combined, so that the magnetic field heating area can be controlled more accurately, and the heating uniformity effect of the edge of the strip steel is improved. Similarly, the first edge electromagnetic induction heater is preferably driven by the movable trolley to be close to or far from the steel strip running channel.

As shown in fig. 4, an inlet seal chamber 811 is provided on the inlet side of the furnace body of the strip quenching apparatus, and outlet seal chambers 816 are provided on the outlet side of the furnace body, so as to ensure the stability of the temperature field in the furnace.

Further optimize above-mentioned belted steel tempering installation, the tempering heating section still includes second limit portion heating furnace section 833, second limit portion heating furnace section 833 arrange in the second indulges magnetic induction heating furnace section 832 with between the second soaking furnace section 834, second limit portion heating furnace section 833 includes two sets of second limit portion heating mechanism that are used for heating belted steel limit portion, and two sets of second limit portion heating mechanism divide and list in furnace body transmission side and operation side. By arranging the second edge heating furnace section 833 behind the second longitudinal magnetic induction heating furnace section 832, the edge temperature difference region of the strip steel generated by longitudinal magnetic induction heating can be heated, so that the condition of temperature nonuniformity in the width direction of the strip steel is reduced or avoided, the tempering quality of the strip steel is obviously improved, the uniform precipitation consistency of the hot-rolled or cold-rolled strip steel in the width direction tissue and carbide is improved, and the performance consistency of the product in the width direction is ensured. Similarly, the second side heating mechanism comprises a second side magnetic induction heater arranged on the corresponding side of the furnace body and a second magnetic shielding structure used for limiting the magnetic field of the second side magnetic induction heater on the corresponding side of the strip steel. Selectively shielding part of the magnetic field through a second magnetic shielding structure, allowing part of the magnetic field to extend along a set direction, so that the magnetic field can act on the edge region to be heated of the strip steel, and the direction of the magnetic field accords with a preset direction, for example, heating is carried out along the width direction or the length direction of the strip steel; through the magnetic field regulating ability of the second edge magnetic induction heater and the selective shielding effect of the second magnetic shielding structure, better magnetic field regulating ability can be obtained, and the magnetic induction heating effect with specified direction and specified strength is realized. The second magnetic shielding structure can be, for example, a magnetic field shielding case and a magnetic field channel is formed on the magnetic field shielding case, and in another embodiment, the second magnetic shielding structure includes a second shielding copper plate arranged on the corresponding side of the furnace body, the plate surface of the second shielding copper plate is parallel to the running direction of the strip steel, and obviously, the second shielding copper plate is arranged at a position which enables the magnetic field of the second side magnetic induction heater to act on the region of the to-be-heated side of the strip steel. In a preferred embodiment, the magnetic field width constrained by the second magnetic shielding structure is 45-60 mm, preferably about 50mm, that is, one side boundary for supplementing heat to the strip steel edge is the strip steel edge, and the other side boundary is 45-60 mm away from the strip steel edge, so that the temperature difference region at the strip steel edge can be better covered. Similarly, the second edge electromagnetic induction heater is preferably driven by the traveling carriage to be close to or far from the strip running passage.

The strip steel tempering device is further optimized, and the cooling mechanism configured in the tempering and cooling section comprises a circulating gas injection cooling mechanism 835, namely, heated gas after the strip steel is cooled in the device is extracted by a circulating fan, cooled by a heat exchanger and changed into cold gas, and the cold gas is injected to the upper surface and the lower surface of the strip steel by the circulating fan at certain pressure, so that the newly increased degree of an oxide layer of the strip steel can be remarkably reduced. The temperature of the strip steel can be rapidly cooled to-500 ℃ by the circulating gas injection cooling mechanism 835. Preferably, the circulating gas injection cooling mechanism 835 is arranged in the furnace body of the tempering heating section and is positioned at the tail part of the furnace body; based on the structure, on one hand, the newly-added oxide layer of the strip steel can be further reduced, and on the other hand, the compactness of the strip steel tempering device can be further improved. Similarly, as shown in fig. 4, an inlet seal chamber 831 is provided at the furnace inlet side of the strip tempering device, and outlet seal chambers 836 are provided at the furnace outlet side, so as to ensure the stability of the temperature field in the furnace; and the circulating gas injection cooling section is sealed by the outlet side sealing chamber 836 of the furnace body, so that the number of sealing equipment can be reduced, and the equipment cost is reduced. Further preferably, as shown in fig. 4, the cooling mechanism of the tempering and cooling section further includes an external cooling mechanism 837, and the external cooling mechanism 837 adopts an air-blowing cooling mechanism and/or a water-spraying cooling mechanism to cool the strip steel from about 500 ℃ to the normal temperature.

In the above-described quenching apparatus for a strip steel, it is preferable to adopt the following cooling scheme:

as shown in fig. 5, a quenching cooling device is provided, which comprises a plurality of cooling boxes 8171 sequentially arranged along the running direction of the strip steel, wherein an intermediate tension roller 8173 is arranged between two adjacent cooling boxes 8171, a wringing roller 8174 is arranged on the outlet side of the tail end cooling box 8171, a quenching cooling mechanism 8172 is arranged in each cooling box 8171, and each cooling mechanism comprises an aerosol cooling mechanism and/or a water spray cooling mechanism. Wherein, preferably, an inlet pinch roll 8175 for pinching the strip steel for stable cooling is disposed at an inlet side of the head end cooling tank 8171; it will be understood that a roller conveyor is arranged in each cooling box 8171 in order to support the strip.

The tension control on the running of the strip steel can be realized through the middle tension roller 8173, the strip steel plate shape can be well controlled, and the phenomenon that the quenching cooling generates large plate shape change is avoided, so that the quality of the strip steel and the product performance are improved. The intermediate tension rollers 8173 are preferably provided with at least two groups to realize tension subsection control, and can correspondingly control the tension according to the quenching and cooling process of the strip steel, so that the strip shape of the strip steel is better controlled; the number of the cooling boxes 8171 is preferably not less than three. Further, the intermediate tension roller 8173 is driven by a variable frequency motor; in an alternative scheme, the intermediate tension roller 8173 includes an upper movable roller and a lower fixed roller, and the upper movable roller can be driven by a driving device such as a hydraulic cylinder to lift, so that the roller gap of the intermediate tension roller 8173 can be adjusted as required.

The wringing roller 8174 can partially remove cooling water remained on the surface of the strip steel, the wringing roller 8174 is conventional equipment in the metallurgical field, and the specific structure is not described in detail herein. Further, as shown in fig. 5, a drying unit 8176 is arranged at the outlet side of the wringing roller 8174, so that residual water stains on the surface of the strip steel can be further removed, and the surface quality of the strip steel is ensured; the drying unit 8176 may be a hot air drying unit, for example, it includes a drying box and a hot air supply pipe disposed on the drying box.

It can be understood that the above-mentioned aerosol cooling mechanism includes an aerosol cooling nozzle, and the aerosol cooling nozzle can adopt a conventional two-fluid nozzle, and the cooling water is formed into atomized water under the action of high-pressure gas; the water spray cooling mechanism comprises a spray nozzle, and cooling water can form atomized water under the mechanical action. The atomized cooling medium is used for cooling the strip steel, the cooling effect on the strip steel is good, the quenching cooling parameters such as the quenching cooling rate and the final cooling temperature of the strip steel are easy to control, so that good strip steel quality and shape are obtained, the requirements of continuous quenching or isothermal quenching of the strip steel can be well met, and particularly the production of thin-specification strip steel is realized. Wherein, the control of the speed and the final cooling temperature of the strip steel cold area can be controlled by accurately controlling the amount of cooling water, the cooling time and the like.

In this embodiment, preferably, a mist cooling mechanism is used, and the atomization effect of the cooling water is good. As shown in fig. 5, a fog discharge pipe 8177 is arranged on the cooling box 8171, and the gas medium in the cooling box 8171 is pumped away under the action of an induced draft fan; a gas-water separation device can be arranged at the mist outlet of the cooling box 8171.

Continuing above-mentioned quenching cooling arrangement, quenching cooling mechanism 8172 is including arranging in the upper portion cooling unit of belted steel operation passageway top and arranging in the lower part cooling unit of belted steel operation passageway below, upper portion cooling unit with lower part cooling unit all includes a plurality of cooling nozzle 81721 along belted steel operation passageway width direction interval arrangement, cooling nozzle 81721 adopts aerial fog cooling nozzle or water smoke nozzle. The upper cooling unit is used for cooling the upper surface of the strip steel, the lower cooling unit is used for cooling the lower surface of the strip steel, and the upper cooling unit and the lower cooling unit are matched to obtain the required cooling rate and the required final cooling temperature of the strip steel and improve the uniformity of strip steel cooling.

In a further preferred scheme, each group of cooling units comprises a middle nozzle for cooling the middle of the strip steel and an edge nozzle for cooling the edge of the strip steel, each middle nozzle of each group of cooling units is arranged on a first medium supply pipe, each edge nozzle of each group of cooling units is arranged on a second medium supply pipe, namely, the middle cooling of the strip steel and the edge cooling of the strip steel are independent from each other, different cooling rates can be adopted for different areas of the strip steel in a targeted manner, the cooling uniformity in the width direction of the strip steel is ensured, so that a good strip steel shape is obtained, and the consumption of the cooling medium can be saved.

Further preferably, as shown in fig. 6, in the upper cooling unit, a first water baffle 81722 is arranged below at least part of the cooling nozzles 81721, at least part of plate bodies of the first water baffle 81722 overlaps with the spraying area of the corresponding cooling nozzles 81721, or at least part of plate bodies of the first water baffle 81722 extends to the spraying path of the corresponding cooling nozzles 81721, on one hand, the spraying range of the cooling nozzles 81721 can be adjusted by the first water baffle 81722, so that the cooling effect of the upper cooling unit can be adjusted according to different strip steel conditions, and on the other hand, the cooling width of the upper cooling unit can be adjusted to meet the quenching cooling requirements of strip steels with different widths. It will be appreciated that the first water dam 81722 described above is disposed against the edge nozzles, particularly the outermost edge nozzles. Furthermore, the overlapping area of at least part of the first water baffle 81722 and the spraying area corresponding to the cooling nozzle 81721 can be designed to be adjustable, and the adjusting effect on the cooling effect and/or the cooling width of the upper cooling unit is better; in one embodiment, the first water baffle 81722 is configured with an elevating driving unit, for example, a linear driving device such as an air cylinder drives the first water baffle 81722 to elevate, so as to adjust the shielding area of the cooling nozzle 81721 by the first water baffle 81722.

Further preferably, as shown in fig. 6, the first water baffle 81722 is a slot-shaped plate with two wide sides and a low middle, so that the cooling water blocked by the first water baffle 81722 can be prevented from dripping onto the surface of the strip steel again, and the blocked cooling water can be drained and recovered by the slot-shaped first water baffle 81722.

Similarly, the water blocking structure may also be adopted in the lower cooling unit to achieve adjustment of the cooling effect and/or the cooling width of the lower cooling unit, that is, a second water blocking plate 81723 is disposed above at least part of the cooling nozzles 81721, and at least part of the plate body of the second water blocking plate 81723 overlaps with the spraying area of the corresponding cooling nozzle 81721. The second water baffle 81723 can be fixed or movably mounted.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides a strip steel coiling system, includes the coiling machine, turns to the pinch roll and unloads the package car, turn to the pinch roll with the coiling machine links up its characterized in that through wearing the area baffle: the supplied material side that turns to the pinch roll is equipped with the bender, at least one auxiliary compression roller has been arranged around the reel of coiling machine, the axial of auxiliary compression roller with the axial direction parallel of reel, thereby auxiliary compression roller disposes auxiliary compression roller drive unit and has the work position with coil of strip rolling contact and keeps away from the standby position of coil of strip.

2. The strip coiling system as defined in claim 1, wherein: the auxiliary pressing roller is provided in plurality and arranged in sequence along the circumferential direction of the winding drum.

3. The strip coiling system as defined in claim 2, wherein: the working positions of the auxiliary compression rollers are uniformly distributed between the 6 o 'clock position and the 12 o' clock position of the steel coil.

4. The strip coiling system as defined in claim 2 or 3, wherein: and when the carrier roller is in contact with the steel coil and each auxiliary press roller is positioned at a working position, the carrier roller and each auxiliary press roller are combined to form a roll assisting roller set.

5. The strip coiling system as defined in any one of claims 1 to 3, further comprising: the working position of one auxiliary pressure roller is near the initial position of the jaw of the winding drum.

6. The strip coiling system as defined in claim 1, wherein: the threading guide plate comprises an upper guide plate and a lower guide plate which are respectively arranged on the upper side and the lower side of the strip steel design steel wire, and the upper guide plate and the lower guide plate are respectively connected with a guide plate driving unit.

7. The strip coiling system as defined in claim 6, wherein: and the tail end of the upper guide plate is provided with a guide press roller.

8. The strip coiling system as defined in claim 6, wherein: the upper guide plate and the lower guide plate are both telescopic guide plates.

9. A high-strength steel coiling method for coiling a high-strength steel strip by using the strip coiling system as defined in any one of claims 1 to 8, the method comprising:

a. at the initial coiling stage, straightening the strip steel by using the bending machine, and guiding the strip steel to a winding drum through the steering pinch roll and the strip threading guide plate;

the jaw of the winding drum clamps the strip steel, the diameter of the winding drum is expanded to establish initial tension, when the jaw sequentially passes through the working positions of the auxiliary compression rollers, the auxiliary compression rollers correspondingly press the strip steel to the winding drum, and after a plurality of circles of the strip steel are wound, the winding machine establishes full tension operation;

b. and at the final coiling stage, the strip steel is bent by using the bending machine, and the auxiliary compression rollers and the carrier rollers on the coil stripping car are combined to form a coil assisting roller set to assist in finishing the coiling of the strip tail.

10. The utility model provides a high-strength steel production line, includes decoiler and high-strength steel processing system, its characterized in that: the strip coiling system as defined in any one of claims 1 to 8, wherein said bending machine is disposed downstream of and engaged with said high strength steel processing system.

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