CN110616307A - Hot rolling strip steel heat treatment line - Google Patents
Hot rolling strip steel heat treatment line Download PDFInfo
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- CN110616307A CN110616307A CN201810632238.4A CN201810632238A CN110616307A CN 110616307 A CN110616307 A CN 110616307A CN 201810632238 A CN201810632238 A CN 201810632238A CN 110616307 A CN110616307 A CN 110616307A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
Abstract
A hot rolled strip steel heat treatment line is characterized in that a heat treatment conveying chain roller way is arranged between a bundling device and a cold rolling unit behind a hot rolled strip steel coiling machine, at least one steel coil conveying trolley is arranged on the heat treatment conveying chain roller way, and correspondingly, two ends of the heat treatment conveying chain roller way are respectively provided with a lifting device capable of loading and unloading steel coils to the steel coil conveying trolleys; the steel coil transportation trolley is provided with a heat preservation cover capable of carrying out closed online heat preservation on the hot rolled steel coil. The hot rolled steel strip heat treatment line realizes on-line heat treatment on the coiled hot rolled steel coil in the process of transportation of a transport chain, and achieves the purposes of high efficiency, energy conservation and yield improvement.
Description
Technical Field
The invention belongs to the technical field of deep processing of hot-rolled strip steel, and particularly relates to a hot-rolled strip steel heat treatment line.
Background
At present, most domestic hot-rolled high-strength steel is mostly subjected to precipitation strengthening mechanism, and the steel is directly conveyed to a steel coil warehouse through a conveying chain after being coiled.
In order to solve the problem of large performance fluctuation of the strip steel in the length direction and the width direction, special production lines such as a heat preservation pit, a heat preservation furnace, a bell-type furnace, heat treatment and the like are arranged after the coiling is finished. Meanwhile, the performance fluctuation of the inner ring and the outer ring is large due to uneven cooling of the hot-rolled strip steel in the transportation process, and the problem that the comprehensive yield of the hot-rolled ultrahigh-strength steel is further improved is solved.
After the steel coil of the traditional hot rolling production line is coiled, the steel coil subjected to packing treatment is directly conveyed to a steel coil warehouse by using a conveying chain roller way. For the treatment processes such as heat preservation slow cooling, annealing and the like, special production lines such as heat preservation pits, heat preservation furnaces, bell-type furnaces, heat treatment and the like are required to be arranged. Has the characteristics of large investment, high energy consumption, large transportation cost, low yield and the like. In high-strength steel varieties, the process effect cannot reach an ideal state due to aging.
For example, chinese patent CN201210338335 discloses a "carrier roller tray type metal strip coil transportation device", which adopts a transportation chain tray to perform coiling transportation after the coiling of a steel strip coil. The device is a fixed saddle for only transporting a single steel coil. The steel coil can not be subjected to online heat preservation in the transportation process.
The on-line heat preservation slow cooling device disclosed in the chinese patent CN201710853613.3 only has a heat preservation effect, and the bottom structure cannot be completely sealed, so the heat preservation effect of the steel coil is not good.
The tunnel type heat preservation cover disclosed in Japanese patent JP2010094710(A) increases the manufacturing cost of production lines such as special heat preservation pits, and the like, is generally higher, and the construction period of the transformation process is long, so that the normal production is influenced.
The "mobile tunnel heat-insulating cover" disclosed in korean patent No. 1589913(B1) realizes movement while realizing heat insulation, but the whole mobile equipment is contained in a heat-insulating chamber to reduce the service life of the equipment. The single independent heat preservation can not be realized, and the heat preservation cover is perfectly combined with a transportation line.
Chinese patent CN101413051B discloses a hot-rolled strip steel deep processing treatment system, which uses a heat-insulating tunnel structure, but the whole mobile equipment is contained in a heat-insulating cavity to reduce the service life of the equipment.
The problems of the prior art are as follows:
(1) the most outstanding problem of the hot rolling heat preservation device is that the interval time of the strip steel entering the heat preservation device after being coiled is too long, the metallographic structure transformation of the strip steel is mostly generated or completed, and the effect of improving the hot coiling performance by an off-line slow cooling mode can not meet the quality requirement of high-strength steel. The hot coil needs to be lifted for 20-30 minutes when being placed in the heat-insulating cover, and the air cooling time of the steel coil is too long, so that the heat-insulating effect and the material performance are influenced.
(2) Production lines such as a special heat preservation pit, a heat preservation furnace, a bell-type furnace, heat treatment and the like are additionally arranged, the manufacturing cost is generally higher, and the normal production is influenced by the long construction period of the transformation process. And has the problem of poor heat preservation effect (fast temperature drop rate).
(3) The heat preservation cover is basically in an off-line mode (the heat preservation device is statically placed on a coiling platform), and the normal production rhythm of a production line is disturbed by the transportation and the hoisting of steel coils. The productivity of a steel rolling production line is influenced, and the actual batch production difficulty is high.
Disclosure of Invention
The invention aims to provide a hot-rolled strip steel heat treatment line, which realizes on-line heat treatment of a coiled hot-rolled steel coil in the process of transportation of a transportation chain, and achieves the purposes of high efficiency, energy conservation and yield improvement.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a hot rolled strip steel heat treatment line is characterized in that a heat treatment conveying chain roller way is arranged between a bundling device and a cold rolling unit behind a hot rolled strip steel coiling machine, at least one movable hot coil heat preservation heat treatment device is arranged on the heat treatment conveying chain roller way, and correspondingly, two ends of the heat treatment conveying chain roller way are respectively provided with a lifting device capable of loading and unloading steel coils to the movable hot coil heat preservation heat treatment device; the movable hot coil heat preservation heat treatment device is provided with a heat preservation cover capable of carrying out closed on-line heat preservation on the hot rolled steel coil.
Further, one side of the heat treatment conveying chain roller way is provided with a steel coil heat preservation area, and the steel coil heat preservation area is provided with at least one heat preservation conveying chain roller way connected to the heat treatment conveying chain roller way.
And at least one heat treatment work station is arranged on the heat treatment conveying chain roller way or the heat preservation conveying chain roller way, and a heating system or/and a protective gas cooling input system for heating the interior of the heat preservation cover on the movable heat roll heat preservation heat treatment device is integrated in the heat treatment work station.
And the heat treatment conveying chain roller way is provided with an information coding and printing device for printing the steel coil information on the steel coil corresponding to one end of the cold rolling unit.
Preferably, the mobile hot-rolling heat preservation and treatment device comprises a bottom plate; the steel coil fixing seat is arranged in the center of the bottom plate; the tray is of an annular structure and is horizontally sleeved in the middle of the steel coil fixing seat; the lower end of the heat-preservation cover is provided with an opening, the heat-preservation cover covers the tray, and the volume of the inner cavity of the heat-preservation cover is larger than that of the steel coil; the electric heating device is arranged on the inner side wall of the heat-preservation cover; the temperature sensor is arranged in the heat-preservation cover;
the electric heating device and the temperature sensor are electrically connected with the information acquisition control module.
Preferably, the mobile hot-rolling heat preservation and treatment device further comprises a gas protection device and a gas sensor, and the gas protection device and the gas sensor are respectively and electrically connected with the information acquisition control module.
Preferably, a signal transmitting module is arranged in the information acquisition control module.
Preferably, the steel coil fixing seat comprises two parallel supporting bodies, and the upper end surfaces of the two supporting bodies are inclined planes and are symmetrically arranged; and a side surface sealing device is respectively arranged at the gap positions at the two sides of the two supporting bodies.
Preferably, establish bottom sealing device between two supporter bottoms of coil of strip fixing base, seal the clearance between two supporter bottoms.
Preferably, the bottom sealing means comprises,
the supporting plate is arranged between the two supporting bodies of the steel coil fixing seat, the supporting plate is vertically arranged, and a plurality of rollers are uniformly arranged at intervals along the length direction at the lower parts of the two side surfaces of the supporting plate to form a slidable mechanism;
and the sealing plate is horizontally arranged on the top surface of the supporting plate, and the size of the sealing plate corresponds to the gap between the bottoms of the two supporting bodies.
Preferably, an electromagnetic block is arranged on one side end face of the supporting plate, correspondingly, and a metal stop block matched with the electromagnetic block is arranged between the end parts of one side of the two supporting bodies of the steel coil fixing seat.
Preferably, the side sealing means comprises,
the two fixed bottom plates are respectively and horizontally arranged at the outer sides of the two supporting bodies of the steel coil fixed seat and at the bottom of the gap; a plurality of guide wheels are axially arranged on the outer side surface of the fixed bottom plate at intervals;
the two sealing pieces are respectively arranged at the gaps at the two sides of the two supporting bodies of the steel coil fixing seat, and the bottom ends of the sealing pieces are arranged on the guide wheels of the fixing bottom plate in a sliding manner;
the driving mechanism comprises a driving mechanism and a driving mechanism,
the two racks are respectively horizontally arranged on the two sealing pieces, and one end of each rack is connected with the sealing piece;
the driving shaft is horizontally arranged on the other side of the supporting body opposite to the gap through two bearing seats; two ends of the driving shaft are respectively provided with a gear which is meshed with the rack.
Preferably, the bearing seat is arranged on one side of the support body through a fixing plate, a through hole for the rack to pass through is formed in one side of the fixing plate, and a roller abutted against the top surface of the rack is arranged on the outer side surface of the fixing plate above the through hole.
Preferably, the sealing plate and the sealing element are of a composite layer structure, the middle of the sealing plate and the sealing element is made of a heat-insulating material felt, and the two sides of the sealing plate and the sealing element are coated by high-temperature-resistant steel plates.
Preferably, the seal is of a right-angle plate structure.
Preferably, the lower part of the side surface of the heat-insulating cover is provided with a positioning sleeve, and correspondingly, the tray of the heat-insulating cover is provided with a positioning pin matched with the positioning sleeve; the locating pin is preferably a cone.
Preferably, the heat-insulating cover is provided with air holes and corresponding exhaust valves.
Preferably, the heat-insulating cover is of a composite structure, the outer protective layer is a high-strength steel plate, the middle layer is a heat-insulating material, and the inner layer is a high-temperature-resistant stainless steel plate.
Preferably, the heat preservation cover is a composite structure and sequentially comprises an internal radiation layer, an electric heating wire layer, an intermediate mesh cover, an intermediate heat preservation layer and an outer protection layer from inside to outside.
Preferably, the electric heating device is an electric heating wire, and the temperature sensor is a thermocouple.
In the hot-rolled strip steel heat treatment line of the present invention:
after the steel coil transportation trolley transports the steel coil to the tray after the strip steel is coiled, the heat preservation device is arranged on the tray, and the steel coil is preserved heat in the first time. The heat preservation cover and the steel coil normally run along with the conveying chain roller way, the production and the operation of the subsequent steel coil are not influenced, and the heat treatment is realized in the conveying process.
The transportation trolley transversely moves the roller way device: and the unloaded transportation trolley device without the heat preservation cover is transferred into the heat treatment transportation chain roller way from the return transportation chain roller way, so that the transportation trolley device is transferred, and the transportation trolley is ensured to subsequently accept the curled hot rolled steel coil.
The heat preservation cover lifting device lifts the heat preservation cover on the transport trolley device with the heat preservation cover moving on the return transport chain roller way, and then moves the heat preservation cover to the heat treatment transport chain roller way to wait. When the hot rolled steel after the completion of the coiling is placed on the transport trolley device, the heat preservation cover is transferred to the hoisting transport device and is automatically placed on the transport trolley device, so that the heat preservation of the hot rolled steel after the completion of the coiling of the steel coil is realized.
The transportation trolley device with the heat preservation cover can meet the requirement of online heat treatment on the steel coil. The transportation trolley device can move on a transportation chain roller way, and the steel coil after hot rolling and curling is transported to a transportation chain heat preservation area to realize heat treatment. The heat-insulating cover and the transport trolley device can be separated and combined by using the heat-insulating cover to transfer the hoisting and transporting device and the heat-insulating cover to transfer the hoisting and transporting device.
Single insulating cover area: and carrying out heat preservation heat treatment on the steel coil in the transportation trolley device with the heat preservation cover. The purpose of heat treatment is achieved by controlling the running time of the transport trolley device with the heat-insulating cover on a heat treatment transport chain roller way.
The regional arrangement of single heat preservation cover needs to be combined with the travelling bogie device with the heat preservation cover, and the number and the time of the hot rolled steel coils needing heat preservation are considered. And a steel coil hot coil heat preservation cover n, wherein the number of the steel coil transport trolleys is more than n +1 on a production line. After the heat preservation cover is separated from the transport trolley device, the heat preservation cover is conveyed to the lifting transport device under the heat preservation cover and returns to the upper conveying lifting transport device along with the transport trolley on a return transport chain roller way.
The invention can carry out special processing on special batches of hot rolled strip steel according to the requirements, and adds a heat treatment workstation in the heat insulation area. The heat treatment workstation is integrated with an internal heating system of the heat preservation cover and a protective gas cooling input system.
For the hot-rolled strip steel needing to be heated, the hot-rolled strip steel transporting trolley transports the hot-rolled steel coil to the workstation, the internal heating system heats the hot-rolled strip steel, and the steel coil is secondarily heated by utilizing the relevant heat treatment curve and the process requirement, so that the overall performance of the hot-rolled strip steel is improved.
For hot rolled strip steel which needs gas protection and can be cooled by rapid control, a transportation trolley device with a heat insulation cover entering a processing workstation is connected to a protective gas cooling input system. The control of the temperature inside the heat-insulating cover device is achieved by controlling the gas quantity and the ratio of the accessed protective gas. The secondary heating is carried out on the steel coil by utilizing the relevant heat treatment curve and the process requirement to improve the overall performance of the hot-rolled strip steel.
And after the hot-rolled strip steel heat-insulating cover is separated, the hot-rolled strip steel is transported to an information code printing position by the hot-rolled strip steel transport trolley, and the steel coil information is printed on the steel coil. And ensuring that the steel coil separated from the heat-insulating cover enters the following process production line after carrying the steel coil information.
And after the information printing treatment is finished, the steel coil after the heat treatment is transported to a steel coil warehouse through a transport chain roller way, or transported to the next procedure of the production line for production by using a transport chain system.
The processing line is also provided with a heat treatment workstation and an information coding and printing device; the heat treatment workstation needs to carry out deep processing special treatment on the hot rolled strip steel of a special batch, and the heat treatment workstation is added in the heat insulation area. The heat treatment workstation is integrated with an internal heating system of the heat preservation cover and a protective gas cooling input system.
An information encoding and printing apparatus: the hot-rolled strip steel transport trolley transports the hot-rolled strip steel to an information code printing position, and the steel coil information is printed on the steel coil.
And conveying the steel coil after the heat treatment to a steel coil storage warehouse along with a conveying chain roller way, and turning the steel coil needing cold rolling or flat trimming to the conveying chain roller way of the next procedure by using a rotary roller way device of the conveying trolley.
The technology for finishing heat preservation, uniform heating and slow cooling of the steel coil on line by steel coil transportation equipment is an original technology. The heat preservation cover is single independent, and every coil of strip all can carry out temperature control in the transportation chain transportation, saves time and improves production rhythm and efficiency simultaneously.
The invention has the beneficial effects that:
the invention realizes the on-line heat treatment of the coiled hot-rolled steel coil in the process of transportation of the transportation chain, immediately loads the hot-coil waste heat annealing device on the steel coil after the steel coil is coiled out of the coiling machine, and implements the heat treatment process of soaking and slow cooling on the steel coil by utilizing the heat of the steel coil, thereby achieving the purposes of high efficiency, energy saving and material yield improvement.
The production line of the invention carries out heat preservation treatment on the strip steel coil after coiling in the first time, thereby greatly improving the problems of insufficient performance improvement and large performance fluctuation of the strip steel in the length and width directions caused by overlong time from the coiling of the steel coil to the entering of the slow cooling device. The method avoids the severe fluctuation of rolling force and the out-of-tolerance standard of the thickness of the cold-rolled finished product in the cold-rolling production, increases the rolling stability of the cold-rolling acid continuous rolling unit and increases the yield of the cold-rolled ultrahigh-strength steel.
1. Real-time performance: the heat preservation treatment is directly realized after the hot coil is coiled, and the interval time is short.
2. In the linear range: the heat preservation of the hot coil is directly realized on a conveying chain without a redundant process.
3. The economic efficiency is as follows: and the waste heat of the steel coil is utilized to realize the heat treatment after coiling, so that the energy is saved and the environment is protected.
4. The manufacturability is as follows: the heat preservation effect is ideal, and the requirements of the high-strength steel heat preservation process can be met.
Drawings
FIG. 1 is a schematic view of an embodiment of a hot rolled strip heat treatment line according to the present invention.
FIG. 2 is a schematic view of an embodiment of a hot rolled strip heat treatment line according to the present invention.
FIG. 3 is a schematic view of an embodiment of a hot rolled strip heat treatment line according to the present invention.
FIG. 4 is a schematic structural view of a mobile thermal-roll heat-preservation and treatment apparatus according to embodiment 1 of the present invention.
FIG. 5 is a side view of the mobile thermal roll heat treatment apparatus of example 1 of the present invention.
FIG. 6 is a front view of the mobile thermal rolling heat treatment apparatus of embodiment 2 of the present invention.
Fig. 7 is a front view of the mobile thermal roll heat treatment apparatus of embodiment 3 of the present invention.
Fig. 8 is a partial sectional view of a heat-retaining cover in an embodiment of the mobile heat-roll heat-retaining heat treatment apparatus of the present invention.
FIG. 9 is a perspective view of a mobile thermal roll heat treatment apparatus according to embodiment 1 of the present invention.
Fig. 10 is a front view of the mobile thermal roll heat treatment apparatus of embodiment 1 of the present invention.
Fig. 11 is a perspective view of a bottom sealing device in example 1 of the mobile thermal roll heat treatment apparatus of the present invention.
Fig. 12 is a front view of the mobile thermal roll heat treatment apparatus of embodiment 1 of the present invention.
Fig. 13 is a side view of fig. 12.
Fig. 14 is a bottom perspective view of the mobile thermal roll heat treatment apparatus of embodiment 1 of the present invention.
Fig. 15 is an enlarged schematic view of a portion a of fig. 14.
Detailed Description
Referring to fig. 1, in the hot rolled strip heat treatment line of the present invention, a heat treatment transport chain roller 30 is disposed between a bundling device 20 and a cold rolling mill group behind a hot rolled strip coiler 10, at least one mobile hot strip heat preservation heat treatment device 40 is disposed on the heat treatment transport chain roller 30, and correspondingly, a lifting device 50, 50' capable of loading and unloading steel strips to the mobile hot strip heat preservation heat treatment device is disposed at each of two ends of the heat treatment transport chain roller 30; the movable hot coil heat preservation heat treatment device 40 is provided with a heat preservation cover capable of carrying out closed on-line heat preservation on the hot rolled steel coil.
Referring to fig. 2, at least one heat treatment workstation 80 is disposed on the heat treatment conveying chain roller way 30 or the heat preservation conveying chain roller way 70, and a heating system or/and a protective gas cooling input system for heating the interior of the heat preservation cover of the mobile hot-rolled heat preservation heat treatment device is integrated in the heat treatment workstation 80; 90 is a rotary roller table.
Referring to fig. 3, a steel coil heat preservation area 60 is arranged at one side of the heat treatment transportation chain roller way 10, and the steel coil heat preservation area 60 is provided with at least one heat preservation transportation chain roller way 70 and a lifting device 50 ″ connected to the heat treatment transportation chain roller way.
Referring to fig. 3, the heat treatment transportation chain roller way 30 is provided with an information coding and printing device 90 for printing the information of the steel coil on the steel coil corresponding to one end of the cold rolling unit.
Referring to fig. 4 to 15, the mobile hot-rolled thermal treatment apparatus 40 according to the present invention includes,
a base plate 1;
the steel coil fixing seat 2 is arranged in the center of the bottom plate 1;
the tray 3 is of an annular structure and is horizontally sleeved in the middle of the steel coil fixing seat 2;
the lower end of the heat-insulating cover 4 is opened and covers the tray 3, and the volume of the inner cavity of the heat-insulating cover is larger than that of the steel coil 100;
the electric heating device 5 is arranged on the inner side wall of the heat-preservation cover 4;
the temperature sensor 6 is arranged in the heat-preservation cover 4;
the information acquisition control module 7, the electric heating device 5, the temperature sensor 5 electric connection this information acquisition control module 7.
Further, the system also comprises a gas protection device and gas sensors 8 and 8' which are respectively and electrically connected with the information acquisition control module 7.
Preferably, a signal transmitting module is arranged in the information acquisition control module 7.
Preferably, the steel coil fixing seat 2 comprises two support bodies 21 and 22 which are parallel, and the upper end surfaces of the two support bodies 21 and 22 are inclined planes and are symmetrically arranged; a side sealing device 9, 9' is respectively arranged at the gap between the two sides of the two supporting bodies 21, 22.
A bottom sealing device 11 is arranged between the bottoms of the two supporting bodies 21 and 22 of the steel coil fixing seat 2 to seal the gap between the bottoms 21 and 22 of the two supporting bodies.
Preferably, the bottom sealing means 11 comprise,
the supporting plate 111 is arranged between the two supporting bodies 21 and 22 of the steel coil fixing seat 2, the supporting plate 111 is vertically arranged, and a plurality of rollers 112 are uniformly arranged at intervals along the length direction at the lower parts of the two side surfaces of the supporting plate 111 to form a slidable mechanism;
and a sealing plate 113 horizontally disposed on the top surface of the supporting plate 111 and having a size corresponding to a gap between the bottoms of the two supporting bodies 21 and 22.
Preferably, the sealing plate 113 is a composite layer structure, the middle is made of a heat insulation material felt, and the two sides are high temperature resistant steel plates.
Preferably, an electromagnetic block 114 is arranged on one side end face of the supporting plate 111, and correspondingly, a metal stop block matched with the electromagnetic block 114 is arranged between the end parts of one side of the two supporting bodies 21 and 22 of the steel coil fixing seat 2.
Referring to fig. 13 to 15, the side sealing device 9 (taking the side sealing device 9 as an example, the same applies hereinafter) includes,
the two fixed bottom plates 91 and 91' are respectively and horizontally arranged at the outer sides of the two supporting bodies 21 and 22 and the bottom of the gap of the steel coil fixed seat 2; a plurality of guide wheels 92 and 92 'are axially arranged on the outer side surfaces of the fixed bottom plates 91 and 91' at intervals;
the two sealing elements 93 and 93 ' are respectively arranged at the gaps at the two sides of the two supporting bodies 21 and 22 of the steel coil fixing seat 2, and the bottom ends of the sealing elements 93 and 93 ' are slidably arranged on the guide wheels 92 and 92 ' of the fixed bottom plate 91;
the drive mechanism 94, including,
two racks 941 horizontally disposed on the two sealing members 93 and 93 ', respectively, one end of the rack 941 being connected to the sealing members 93 and 93';
a driving shaft 942 horizontally disposed on the other side of the supporting body 21 with respect to the gap via two bearing blocks 943; a gear 944 is provided at each end of the driving shaft 942, and the gear 943 is engaged with the rack 941.
Preferably, the bearing bracket 943 is disposed on one side of the supporting body 221 through a fixing plate 944, a through hole 9451 is disposed on one side of the fixing plate 945 and used for the rack 941 to pass through, and a roller 946 abutted to the top surface of the rack 941 is disposed on the outer side surface of the fixing plate 945 above the through hole 9451.
Preferably, the sealing member 93 is a composite layer structure, the middle is made of a heat insulating material, and the two sides are coated by high temperature resistant steel plates.
Preferably, the sealing member 93 is a rectangular plate structure.
Preferably, a positioning sleeve 12 is arranged at the lower part of the side surface of the heat-insulating cover 4, and correspondingly, a positioning pin 13 matched with the positioning sleeve 12 is arranged on the heat-insulating cover tray 3; the positioning pin 13 is preferably conical.
Preferably, the heat-insulating cover 4 is provided with a vent hole and a corresponding exhaust valve 41.
Preferably, the heat-insulating cover 4 is of a composite structure, the outer protective layer is a high-strength steel plate, the middle layer is a heat-insulating material, and the inner layer is a high-temperature-resistant stainless steel plate.
Preferably, the heat-insulating cover 4 is a composite structure, and comprises an inner radiation layer 42, an electric heating wire layer 43, an intermediate mesh cover 44, an intermediate heat-insulating layer 45 and an outer protective layer 46 from inside to outside in sequence. The heat-insulating cover composite structure is fixed by adopting anchoring nails 47.
Referring to fig. 3 and 4, the heat-insulating cover 4 is a square heat-insulating cover or a circular heat-insulating cover.
Preferably, the electric heating device 5 is an electric heating wire, and the temperature sensor is a thermocouple.
The invention carries out heat preservation treatment on the steel coil of strip steel after being coiled, simultaneously realizes the purpose of carrying out waste heat utilization on the steel coil which is just coiled to achieve annealing treatment, and greatly improves the problems of insufficient performance improvement caused by long time of entering a heat preservation and annealing device after the steel coil is coiled and large performance fluctuation in the length direction and the width direction of the strip steel.
The special treatment such as deep processing and the like is required to be carried out on the hot-rolled strip steel of special batches, and the heating device integrated in the heat-insulating cover and the cooling input of the protective gas can be matched to realize the temperature control under the necessary state.
Claims (20)
1. A hot rolling strip steel heat treatment line is characterized in that a heat treatment conveying chain roller way is arranged between a bundling device and a cold rolling unit behind a hot rolling strip steel coiling machine, at least one movable hot coiling heat preservation heat treatment device is arranged on the heat treatment conveying chain roller way, and correspondingly, two ends of the heat treatment conveying chain roller way are respectively provided with a lifting device capable of loading and unloading strip steel to the movable hot coiling heat preservation heat treatment device; the movable hot coil heat preservation heat treatment device is provided with a heat preservation cover capable of carrying out closed on-line heat preservation on the hot rolled steel coil.
2. The hot rolled strip thermal processing line of claim 1, wherein a coil holding area is provided at one side of the heat treatment chain roller, the coil holding area providing at least one holding chain roller connected to the heat treatment chain roller.
3. The hot rolled strip heat treatment line according to claim 1 or the heat treatment train or the heat preservation train is provided with at least one heat treatment station in which a heating system or/and a shielding gas cooling input system for the inside of the heat preservation cover of the movable hot-rolled heat preservation and heat treatment apparatus are integrated.
4. The hot rolled strip heat treatment line of claim 1, wherein the heat treatment transport chain roller way is provided with an information coding and printing device corresponding to one end of the cold rolling unit for printing the information of the steel coil on the steel coil.
5. The hot rolled strip heat treatment line as claimed in claim 1 or 3, wherein the moving hot coil heat preservation heat treatment apparatus comprises,
a base plate;
the steel coil fixing seat is arranged in the center of the bottom plate;
the tray is of an annular structure and is horizontally sleeved in the middle of the steel coil fixing seat;
the lower end of the heat-preservation cover is provided with an opening, the heat-preservation cover covers the tray, and the volume of the inner cavity of the heat-preservation cover is larger than that of the steel coil;
the electric heating device is arranged on the inner side wall of the heat-preservation cover;
the temperature sensor is arranged in the heat-preservation cover;
the electric heating device and the temperature sensor are electrically connected with the information acquisition control module.
6. The hot rolled strip heat treatment line of claim 5, wherein the mobile hot coil heat treatment apparatus further comprises a gas protection apparatus and a gas sensor, and the gas protection apparatus and the gas sensor are respectively electrically connected to the information acquisition control module.
7. The hot rolled strip heat treatment line of claim 6, wherein the information acquisition control module is provided with a signal transmission module.
8. The hot rolled strip steel heat treatment line according to claim 5, wherein the steel coil fixing seat comprises two support bodies which are arranged in parallel, and the upper end surfaces of the two support bodies are inclined planes and are symmetrically arranged; and a side surface sealing device is respectively arranged at the gap positions at the two sides of the two supporting bodies.
9. The hot rolled strip heat treatment line of claim 5, wherein a bottom sealing means is provided between the bottoms of the two supporting bodies of the steel coil holder to seal a gap between the bottoms of the two supporting bodies.
10. The hot rolled strip heat treatment line of claim 9, wherein the bottom sealing means comprises,
the supporting plate is arranged between the two supporting bodies of the steel coil fixing seat, the supporting plate is vertically arranged, and a plurality of rollers are uniformly arranged at intervals along the length direction at the lower parts of the two side surfaces of the supporting plate to form a slidable mechanism;
and the sealing plate is horizontally arranged on the top surface of the supporting plate, and the size of the sealing plate corresponds to the gap between the bottoms of the two supporting bodies.
11. The hot rolled strip heat treatment line according to claim 10, wherein an electromagnetic block is provided on one side end surface of the supporting plate, and correspondingly, a metal stopper engaged with the electromagnetic block is provided between one side end portions of the two supporting bodies of the steel coil holder.
12. The hot rolled strip heat treatment line of claim 8, wherein the side sealing means comprises,
the two fixed bottom plates are respectively and horizontally arranged at the outer sides of the two supporting bodies of the steel coil fixed seat and at the bottom of the gap; a plurality of guide wheels are axially arranged on the outer side surface of the fixed bottom plate at intervals;
the two sealing pieces are respectively arranged at the gaps at the two sides of the two supporting bodies of the steel coil fixing seat, and the bottom ends of the sealing pieces are arranged on the guide wheels of the fixing bottom plate in a sliding manner;
the driving mechanism comprises a driving mechanism and a driving mechanism,
the two racks are respectively horizontally arranged on the two sealing pieces, and one end of each rack is connected with the sealing piece;
the driving shaft is horizontally arranged on the other side of the supporting body opposite to the gap through two bearing seats; two ends of the driving shaft are respectively provided with a gear which is meshed with the rack.
13. The hot rolled strip heat treatment line as claimed in claim 12, wherein the bearing housing is provided at one side of the support body through a fixing plate, one side of the fixing plate is provided with a through hole through which the rack passes, and an outer side surface of the fixing plate above the through hole is provided with a roller against which a top surface of the rack abuts.
14. The hot rolled strip heat treatment line of claim 10 or 12, wherein the sealing plates and the sealing elements are of a composite layer structure, the middle is a thermal insulation material felt, and the two sides are coated by high temperature resistant steel plates.
15. The hot rolled steel strip heat treatment line of claim 12 or 14, wherein the seal is of a right angle plate configuration.
16. The hot rolled strip heat treatment line of claim 5, wherein a positioning sleeve is provided at a lower portion of a side surface of the heat-insulating cover, and a positioning pin engaged with the positioning sleeve is correspondingly provided on the tray of the heat-insulating cover; the locating pin is preferably a cone.
17. The hot rolled strip heat treatment line of claim 5, wherein the heat-retaining hood is provided with air vents and corresponding exhaust valves.
18. The hot rolled strip heat treatment line of claim 5, wherein the heat-insulating cover is a composite structure, the outer protective layer is a high-strength steel plate, the middle layer is a heat-insulating material, and the inner layer is a high-temperature-resistant stainless steel plate.
19. The hot rolled strip thermal processing line of claim 5, wherein the heat-insulating cover is a composite structure comprising an inner radiation layer, an electric heating wire layer, an intermediate mesh cover, an intermediate heat-insulating layer, and an outer protective layer in this order from the inside to the outside.
20. The hot rolled strip heat treatment line of claim 5, wherein the electric heating means is an electric heating wire and the temperature sensor is a thermocouple.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810632238.4A CN110616307A (en) | 2018-06-19 | 2018-06-19 | Hot rolling strip steel heat treatment line |
| PCT/CN2018/106709 WO2019057116A1 (en) | 2017-09-20 | 2018-09-20 | Hot-rolling online movable thermal insulation heat treatment process, and heat treatment line |
| KR1020207010727A KR20200066630A (en) | 2017-09-20 | 2018-09-20 | Hot rolling online mobile heat insulation heat treatment process, and heat treatment line |
| EP18859703.3A EP3685931B1 (en) | 2017-09-20 | 2018-09-20 | Hot-rolling online movable thermal insulation heat treatment process, and heat treatment line |
| JP2020537826A JP7253558B2 (en) | 2017-09-20 | 2018-09-20 | Hot rolling in-line moving thermal insulation heat treatment process and heat treatment line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810632238.4A CN110616307A (en) | 2018-06-19 | 2018-06-19 | Hot rolling strip steel heat treatment line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110616307A true CN110616307A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810632238.4A Pending CN110616307A (en) | 2017-09-20 | 2018-06-19 | Hot rolling strip steel heat treatment line |
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| CN (1) | CN110616307A (en) |
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Application publication date: 20191227 |