CN220335238U - Internal stress eliminating heat treatment device and complete equipment for hot rolled H-shaped steel - Google Patents
Internal stress eliminating heat treatment device and complete equipment for hot rolled H-shaped steel Download PDFInfo
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- CN220335238U CN220335238U CN202321516371.6U CN202321516371U CN220335238U CN 220335238 U CN220335238 U CN 220335238U CN 202321516371 U CN202321516371 U CN 202321516371U CN 220335238 U CN220335238 U CN 220335238U
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- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 2
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Abstract
The utility model discloses a heat treatment device and complete equipment for eliminating internal stress of hot rolled H-shaped steel, which belong to the technical field of hot rolled H-shaped steel production. The beneficial effects of the utility model are as follows: a plurality of groups of heat radiators are arranged on the soaking transportation roller way, and the temperature of the whole hot rolled H-shaped steel in the length direction is in an equilibrium state by heating the hot rolled H-shaped steel in sections, so that uniform annealing is realized; the limited space of the steel rolling workshop is reasonably utilized, so that the steel rolling workshop has a heat treatment function, and the internal stress of the rolled H-shaped steel product is uniformly annealed and eliminated.
Description
Technical Field
The utility model relates to the technical field of hot-rolled H-shaped steel production, in particular to a hot-rolled H-shaped steel internal stress elimination heat treatment device and complete equipment.
Background
The web plate and the flange deform in different deformation areas in the universal rolling process of the H-shaped steel, so that the deformation rule and the metal flow rule are very complex, and the deformation is uneven, so that the phenomenon of uneven deformation is necessarily caused in the rolling process of the H-shaped steel. In addition, the web is thinner, the flange is thicker, the heat dissipation area of the web is larger, the heat dissipation area of the flange is smaller in the rolling process, particularly the thickness of the R angle part is larger, and the heat dissipation area is smaller, so that the temperature is highest. The web and the flange are deformed unevenly, so that the web and the flange are waved, even cracked and the like in the H-shaped steel rolling process. In addition, the web plate and the flange are not uniformly deformed, so that the tongue shape of the end part of the H-shaped steel is necessarily formed. Temperature difference exists between the section of the H-shaped steel and the non-uniform deformation: the flange temperature is measured to be 50-80 ℃ higher than the web temperature, so that residual stress and residual deformation are necessarily present in the H-shaped steel after rolling, the service performance of the H-shaped steel is affected, and the problem of residual stress of the H-shaped steel is caused in the cooling process after rolling of the H-shaped steel.
In principle, the higher the carbon steel heat treatment temperature is, the longer the heat preservation time is, the more thorough the stress elimination is, the annealing temperature of the carbon steel is 550-625 ℃, and the heat preservation time has a direct relation with the thickness and structure of the product. The hot rolled H-shaped steel taking square billets as raw materials is heated by a heating furnace, and after 5 to 7 times of reciprocating rolling by a roughing mill (BD mill), a head is cut and enters a universal mill to roll 11 times of H-shaped steel continuously. After ultra-fast cooling treatment, the mixture enters a cooling bed for air cooling and water spraying for cooling. The hot rolled H-shaped steel is rolled by a horizontal roller and a lateral pressure vertical roller during universal rolling due to special rolling shape, so that deformation internal stress is increased. When ultra-fast cooling is performed, the phase change causes huge internal stress. The existence of internal stress has great influence on the safe service of the hot rolled H-shaped steel, and the safe practical service life of the steel structure is related.
The utility model patent application publication No. CN106939371A discloses a method for eliminating internal stress and improving the dimensional accuracy of an ultra-high strength steel thin-wall workpiece, which comprises the steps of firstly, placing the workpiece in a high-pressure gas quenching vacuum furnace, and then, carrying out vacuum quenching on the workpiece at a temperature of 1.33 multiplied by 10 -1 Pa～1.33×10 - 3 Heating the workpiece to 420-440 ℃ at a heating rate of 10-13 ℃/min under Pa vacuum degree, preserving heat for 4-5 hours when the tempering temperature is 80-100 ℃ lower than the tempering temperature of the heat treatment process, and then slowly cooling to room temperature under the protection of high-purity nitrogen of 1.5 bar; then using a vibration exciter to continuously vibrate the workpiece for 40min at the frequency of 60-98 Hz and the rotating speed of 3600-5700 rpm and adopting 5 different frequencies; the device is aimed at the ultra-high-strength steel thin-wall workpiece, and the device related to heating, cooling and vibration is not introduced.
In 12 months 2018, the section steel mill Li Tongjing of Laiwu division, mountain steel stock, analyzes the influence of residual stress after cooling hot rolled H-shaped steel, the distribution of steel residual stress, and the control measures of steel residual stress in the paper "research on residual stress of hot rolled large H-shaped steel". In 6 months 2019, yuan Kun of China Swolin engineering technology Co., ltd. In paper "research on hot-dip Zinc part Hot-rolled H-section Steel residual stress removal" analyzed the effect of hot-dip Zinc technology on Hot-rolled H-section Steel residual stress removal.
The deformation analysis and the finite element simulation of different H-shaped steels under the same condition are compared and analyzed in the university of North and east university Wang Junlei of the Shuoshi thesis on the condition of ultra-fast cooling of the H-shaped steels, and the H-shaped steels are observed and the outward expansion phenomenon and the residual stress distribution condition are observed.
The prior art is not suitable for the industrialization technology of eliminating the internal stress of the hot rolled H-shaped steel products, in particular to the internal stress elimination technology capable of realizing the continuous production of the hot rolled H-shaped steel; the internal stress of a hot rolled steel product is usually eliminated by adopting a steel annealing furnace which is independently operated in a heat treatment workshop, continuous rolling and continuous on-line annealing of the hot rolled H-shaped steel cannot be realized, waste heat of the rolled steel product cannot be well utilized, and the problem of high energy consumption is outstanding.
In view of this, the present inventors have conducted intensive studies in response to this need, and have made the present utility model.
Disclosure of Invention
In order to overcome the defect that no industrialization technology for eliminating internal stress is available for hot-rolled H-shaped steel products in the prior art, particularly an internal stress elimination technology capable of realizing continuous production of hot-rolled H-shaped steel, the utility model provides a method for eliminating internal stress of hot-rolled H-shaped steel, wherein the hot-rolled H-shaped steel from a steel rolling heating furnace zone enters a grouping bed zone for grouping after dephosphorization, rough continuous rolling, transverse shearing, finish continuous rolling, ultra-fast cooling, air cooling, water spray cooling, hot air drying, eccentric roller vibration and straightening; residual stress is released according to the heat treatment annealing principle and the eccentric roller vibration mode.
Because the hot-rolled H-shaped steel is ultra-rapidly cooled to the air cooling process and needs to be transported through a roller way, and the hot-rolled H-shaped steel has a certain length (100-150 m) in the roller way transportation process, the problem of uneven temperature in the length direction of the hot-rolled H-shaped steel is solved in the transportation process, and the elimination of internal stress of the hot-rolled H-shaped steel is influenced.
In order to solve the problem, the utility model further provides a heat treatment device for eliminating internal stress of the hot rolled H-shaped steel, which comprises a soaking transportation roller way and a heat radiation system for carrying out heat radiation heating on the hot rolled H-shaped steel, wherein the heat radiation system comprises a plurality of groups of heat radiators which are arranged on the soaking transportation roller way along the length direction of the soaking transportation roller way, each group of heat radiators comprises two heat radiators which are symmetrically arranged at the upper and lower positions of the hot rolled H-shaped steel, the radiating surface of the heat radiator positioned at the upper part is opposite to the upper surface of the hot rolled H-shaped steel, and the radiating surface of the heat radiator positioned at the lower part is opposite to the lower surface of the hot rolled H-shaped steel.
And a plurality of groups of heat radiators are arranged on the soaking transportation roller way, and the temperature of the whole hot rolled H-shaped steel in the length direction is in an equilibrium state by heating the hot rolled H-shaped steel in sections, so that uniform annealing is realized.
Here, the limited space of the steel rolling workshop is reasonably utilized, and the original transport roller way for removing the cooling bed after rolling is innovated, so that the transport roller way has a heat treatment function, and the internal stress of the H-shaped steel product after rolling is uniformly annealed and eliminated.
Preferably, the radiation surface on the heat radiator is a wave-shaped radiation plate.
Preferably, the wave-shaped radiation plate is in a convex arch shape in the wave-shaped width direction, and the wave-shaped length direction of the wave-shaped radiation plate is the same as the length direction of the soaking transportation roller way.
Because the hot rolled H-shaped steel has special rolling shape, the temperature difference of the flange and the web plate is needed to be considered during annealing, the temperature of an R fillet at the joint of the flange and the web plate is focused, a wave-shaped radiation plate is adopted, the wave-shaped radiation plate is designed into an outwards convex arch shape in the wave-shaped width direction, a sufficient heat source can be provided for a heat treatment roller way, the temperature difference of the flange and the web plate is balanced, the temperature of the R fillet at the joint of the flange and the web plate is uniform, and the temperature of the heat treatment roller way is flexibly regulated and controlled so as to reduce the temperature difference of the flange and the web plate of the hot rolled H-shaped steel and the temperature difference of the length direction of the hot rolled H-shaped steel to eliminate the influence caused by internal stress annealing.
Preferably, the heat radiator comprises a radiating body, and a side surface of the radiating body, which is close to the hot rolled H-shaped steel, is provided with a wave-shaped radiating plate; the utility model discloses a wave-shaped radiation plate, including wave-shaped radiation plate, the radiation body is last to keep away from wave-shaped radiation plate one side is provided with the burning nozzle, be provided with air inlet and gas air inlet on the burning nozzle, air inlet passes through air duct, booster fan and links to each other with outside air, the gas air inlet passes through the gas pipeline and links to each other with the gas station.
Preferably, a flue branch pipe is further arranged on one side, far away from the wave-shaped radiation plate, of the heat radiator, and the flue branch pipe is communicated with a flue; the flue branch pipe and the combustion burner are respectively positioned at two sides of the heat radiator.
The heat radiator adopts a gas heat radiator, the gas heat radiator is arranged between roller tables, pulse combustion is controlled, and the heating is up and down symmetrical. The high-temperature waste flue gas after combustion of the gas heat radiator passes through the tube type heat exchanger to heat the drying hot air of the next procedure, thereby realizing comprehensive utilization of energy and saving resources.
The combustion and auxiliary function system is arranged in the underground pipeline, so that the system is safe and reasonable in layout; the gas pipeline is provided with a quick connector, a total electric cut-off valve, a pressure regulating valve, a pressure gauge, a pressure switch and the like, and the air pipeline is provided with a combustion-supporting fan, a pressure gauge, a pressure switch and the like.
Preferably, the flue branch pipe and the combustion burner are respectively positioned on two sides of the heat radiator in the width direction of the waveform radiating plate.
Preferably, a baffle plate is arranged in the middle of the width direction of the wave-shaped radiation plate in the heat radiator, one side of the baffle plate is fixedly arranged on the inner wall of one side of the heat radiator, which is far away from the wave-shaped radiation plate, and the side, close to the wave-shaped radiation plate, of the baffle plate is a free end.
Preferably, the plane of the baffle is perpendicular to the inner wall of the heat radiator at one side far away from the wave-shaped radiation plate, and the wave-shaped radiation plate is symmetrically arranged by taking the plane of the baffle as a symmetrical plane.
Preferably, one side of the baffle plate, which is close to the wave-shaped radiating plate, is positioned on a plane on which two side edges of the wave-shaped radiating plate in the width direction are positioned. The arrangement of the baffle plate ensures that heat flow generated in the heat radiator passes through a space channel between the baffle plate and the waveform radiating plate to heat the waveform radiating plate more fully, thereby effectively improving the radiating effect and the heat energy utilization rate of the heat radiator.
Preferably, the inner wall of the heat radiator adopts a ceramic lining, which can play a role of isolating heat and reduce the loss of heat energy.
The utility model also provides complete equipment for eliminating the internal stress of the hot rolled H-shaped steel, which comprises the heat treatment device. The complete equipment for eliminating the internal stress of the hot rolled H-shaped steel sequentially comprises a dephosphorization machine, a rough continuous rolling machine, a head cutting flying shear, a finish continuous rolling machine, an ultra-fast cooling machine, a cooling bed heat preservation device, an air cooling machine, a water spray cooling machine, a hot air dryer, a core deflection roller conveyor, a straightening machine, a grouping bed area, a cutting machine, a machine inspection bench area and a packing machine, wherein the front end and the rear end of the rough continuous rolling machine are respectively provided with a centering translation bed.
The heat treatment device is arranged between the ultra-fast cooler and the cooling bed heat preservation device.
The beneficial effects are that:
the technical scheme of the utility model has the following beneficial effects:
(1) And a plurality of groups of heat radiators are arranged on the soaking transportation roller way, and the temperature of the whole hot rolled H-shaped steel in the length direction is in an equilibrium state by heating the hot rolled H-shaped steel in sections, so that uniform annealing is realized. Here, the limited space of the steel rolling workshop is reasonably utilized, and the original transport roller way for removing the cooling bed after rolling is innovated, so that the transport roller way has a heat treatment function, and the internal stress of the H-shaped steel product after rolling is uniformly annealed and eliminated.
(2) Because the hot rolled H-shaped steel has special rolling shape, the temperature difference of the flange and the web plate is needed to be considered during annealing, the temperature of an R fillet at the joint of the flange and the web plate is focused, a wave-shaped radiation plate is adopted, the wave-shaped radiation plate is designed into an outwards convex arch shape in the wave-shaped width direction, a sufficient heat source can be provided for a heat treatment roller way, the temperature difference of the flange and the web plate is balanced, the temperature of the R fillet at the joint of the flange and the web plate is uniform, and the temperature of the heat treatment roller way is flexibly regulated and controlled so as to reduce the temperature difference of the flange and the web plate of the hot rolled H-shaped steel and the temperature difference of the length direction of the hot rolled H-shaped steel to eliminate the influence caused by internal stress annealing.
(3) The high-temperature waste flue gas after combustion of the gas heat radiator passes through the tube type heat exchanger to heat the drying hot air of the next procedure, thereby realizing comprehensive utilization of energy and saving resources.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a complete set of equipment for relieving internal stress of a hot rolled H-section steel according to the preferred embodiment of the utility model;
FIG. 2 is a schematic structural view of a heat treatment apparatus for relieving internal stress of a hot rolled H-shaped steel according to the present utility model;
FIG. 3 is a schematic view of the internal structure of a preferred heat radiator of the present utility model;
figure 4 is a schematic side view of a preferred heat radiator of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
In the embodiment, a plurality of groups of heat radiators are arranged on the soaking transportation roller way, and the temperature of the whole hot rolled H-shaped steel in the length direction is in an equilibrium state by heating the hot rolled H-shaped steel in sections, so that uniform annealing is realized. Here, the limited space of the steel rolling workshop is reasonably utilized, and the original transport roller way for removing the cooling bed after rolling is innovated, so that the transport roller way has a heat treatment function, and the internal stress of the H-shaped steel product after rolling is uniformly annealed and eliminated. The specific technical scheme is as follows:
as shown in fig. 1 to 4, the internal stress eliminating method of the hot rolled H-section steel comprises the steps of dephosphorizing, rough continuous rolling, transverse shearing, finish continuous rolling, ultra-fast cooling, air cooling, water spray cooling, hot air drying, eccentric roller vibration and straightening the hot rolled H-section steel 101 from a steel rolling heating furnace area 170, and then entering a grouping bed area for grouping; residual stress is released according to the heat treatment annealing principle and the eccentric roller vibration mode.
As shown in fig. 1, the complete equipment for eliminating internal stress of the hot rolled H-section steel sequentially comprises a dephosphorization machine 100, a roughing mill 200, a head cutting flying shear 300, a finishing mill 400, an ultra-fast cooler 500, a cooling bed heat preservation device 600, an air cooler 700, a water spray cooler 800, a hot air dryer 900, a core shift roller conveyor 110, a straightener 120, a grouping bed area 130, a cutting machine 140, an inspection rack area 150 and a packer 160, wherein the front end and the rear end of the roughing mill 200 are provided with centering translation beds 210.
Because the hot-rolled H-shaped steel is ultra-rapidly cooled to the air cooling process and needs to be transported through a roller way, and the hot-rolled H-shaped steel has a certain length (100-150 m) in the roller way transportation process, the problem of uneven temperature in the length direction of the hot-rolled H-shaped steel is solved in the transportation process, and the elimination of internal stress of the hot-rolled H-shaped steel is influenced.
To solve this problem, in this embodiment, a heat treatment device 1 is disposed between the ultra-fast cooler 500 and the cooling bed heat preservation device 600, and comprises a soaking transportation roller way 11 and a heat radiation system 102 for performing heat radiation heating on the hot rolled H-section steel, the heat radiation system 102 comprises a plurality of groups of heat radiators 12 arranged on the soaking transportation roller way 11 along the length direction of the soaking transportation roller way 11, each group of heat radiators 12 comprises two heat radiators 12 symmetrically disposed on the upper and lower positions of the hot rolled H-section steel 101, the radiating surface of the heat radiator 12 located on the upper side is opposite to the upper surface of the hot rolled H-section steel 101, and the radiating surface of the heat radiator 12 located on the lower side is opposite to the lower surface of the hot rolled H-section steel 101. And a plurality of groups of heat radiators are arranged on the soaking transportation roller way, and the temperature of the whole hot rolled H-shaped steel in the length direction is in an equilibrium state by heating the hot rolled H-shaped steel in sections, so that uniform annealing is realized.
Here, the limited space of the steel rolling workshop is reasonably utilized, and the original transport roller way for removing the cooling bed after rolling is innovated, so that the transport roller way has a heat treatment function, and the internal stress of the H-shaped steel product after rolling is uniformly annealed and eliminated.
As a preferred embodiment, the radiation surface on the heat radiator 12 is a wave-shaped radiation plate 121.
The wave-shaped radiation plate 121 is in a convex arch shape along the wave-shaped width direction, and the wave-shaped length direction of the wave-shaped radiation plate 121 is the same as the length direction of the soaking transportation roller way 11.
Because the hot rolled H-shaped steel has special rolling shape, the temperature difference of the flange and the web plate is needed to be considered during annealing, the temperature of an R fillet at the joint of the flange and the web plate is focused, a wave-shaped radiation plate is adopted, the wave-shaped radiation plate is designed into an outwards convex arch shape in the wave-shaped width direction, a sufficient heat source can be provided for a heat treatment roller way, the temperature difference of the flange and the web plate is balanced, the temperature of the R fillet at the joint of the flange and the web plate is uniform, and the temperature of the heat treatment roller way is flexibly regulated and controlled so as to reduce the temperature difference of the flange and the web plate of the hot rolled H-shaped steel and the temperature difference of the length direction of the hot rolled H-shaped steel to eliminate the influence caused by internal stress annealing.
As a preferred embodiment, as shown in fig. 3 and 4, the heat radiator 12 includes a radiation body 122, and a wave-shaped radiation plate 121 is provided on a side of the radiation body 122 adjacent to the hot rolled H-section steel 101; the utility model discloses a wave-shaped radiation plate, including the wave-shaped radiation plate 121, the radiation body 122 is gone up and is kept away from wave-shaped radiation plate 121 one side is provided with burning nozzle 123, be provided with air inlet 124 and gas inlet 125 on the burning nozzle 123, air inlet 124 links to each other with outside air through air duct 126, booster fan, gas inlet 125 links to each other with the gas station through gas duct 127.
A flue branch pipe 128 is further arranged on the side, away from the wave-shaped radiation plate 121, of the heat radiator 12, and the flue branch pipe 128 is communicated with a flue 129; the flue branch 128 and the combustion burner 123 are located on both sides of the heat radiator 12, respectively.
The heat radiator adopts a gas heat radiator, the gas heat radiator is arranged between roller tables, pulse combustion is controlled, and the heating is up and down symmetrical. The high-temperature waste flue gas after combustion of the gas heat radiator passes through the tube type heat exchanger to heat the drying hot air of the next procedure, thereby realizing comprehensive utilization of energy and saving resources.
The combustion and auxiliary function system is arranged in the underground pipeline, so that the system is safe and reasonable in layout; the gas pipeline is provided with a quick connector, a total electric cut-off valve, a pressure regulating valve, a pressure gauge, a pressure switch and the like, and the air pipeline is provided with a combustion-supporting fan, a pressure gauge, a pressure switch and the like.
Flue branch pipes 128 and the combustion burners 123 are respectively located on both sides of the corrugated radiation plate 121 in the width direction on the heat radiator 12.
A baffle 130 is arranged in the radiator 12 at the middle position in the width direction of the wave-shaped radiation plate 121, one side of the baffle 130 is fixedly arranged on the inner wall of the radiator 12 at the side far away from the wave-shaped radiation plate 121, and the side of the baffle 130 close to the wave-shaped radiation plate 121 is a free end.
The plane of the baffle 130 is perpendicular to the inner wall of the heat radiator 12 on the side far away from the corrugated radiation plate 121, and the corrugated radiation plate 121 is symmetrically arranged with the plane of the baffle 130 as a symmetrical plane.
The baffle 130 is located on the plane of the two sides of the corrugated radiation plate 121 in the width direction, near the corrugated radiation plate 121. The arrangement of the baffle plate ensures that heat flow generated in the heat radiator passes through a space channel between the baffle plate and the waveform radiating plate to heat the waveform radiating plate more fully, thereby effectively improving the radiating effect and the heat energy utilization rate of the heat radiator.
The inner wall of the heat radiator 12 is provided with a ceramic lining, which can play a role in isolating heat and reduce the loss of heat energy.
Here, the soaking transport roller way 11 includes transport roller assemblies 111 uniformly distributed along a length direction thereof, the transport roller assemblies 111 include transport rollers 112 and roller supports 113, the roller supports 113 are fixedly installed on the ground, and centers of both ends of the transport rollers 112 are rotatably installed on the roller supports 113. During transportation, the hot rolled H-shaped steel 101 is positioned on the upper surface of the transportation roller 112, and the rotation of the transportation roller 112 drives the hot rolled H-shaped steel 101 to move forwards.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The internal stress heat treatment device for eliminating the hot rolled H-shaped steel is characterized by comprising a soaking transportation roller way and a heat radiation system for carrying out heat radiation heating on the hot rolled H-shaped steel, wherein the heat radiation system comprises a plurality of groups of heat radiators which are arranged on the soaking transportation roller way along the length direction of the soaking transportation roller way, each group of heat radiators comprises two heat radiators which are symmetrically arranged at the upper and lower positions of the hot rolled H-shaped steel, the radiating surfaces of the heat radiators which are positioned above are opposite to the upper surface of the hot rolled H-shaped steel, and the radiating surfaces of the heat radiators which are positioned below are opposite to the lower surface of the hot rolled H-shaped steel.
2. The internal stress relief heat treatment device for hot rolled H-section steel as claimed in claim 1, wherein said radiation surface on said heat radiator is a wave-shaped radiation plate.
3. The internal stress relief heat treatment device for hot rolled H-section steel according to claim 2, wherein the wave-shaped radiation plate has an outwardly convex arch shape in a wave-shaped width direction thereof, and a wave-shaped length direction of the wave-shaped radiation plate is identical to a length direction of the soaking transport roller way.
4. The internal stress relief heat treatment device for hot rolled H-section steel according to claim 2, wherein the heat radiator comprises a radiation body, and a side surface of the radiation body, which is close to the hot rolled H-section steel, is a wave-shaped radiation plate; the utility model discloses a wave-shaped radiation plate, including wave-shaped radiation plate, the radiation body is last keep away from wave-shaped radiation plate one side is provided with the burning nozzle, be provided with air inlet and gas air inlet on the burning nozzle, air inlet passes through air duct and links to each other with outside air, gas air inlet passes through gas duct and links to each other with the gas station.
5. The internal stress relief heat treatment device for hot rolled H-section steel according to claim 4, wherein a flue branch pipe is further arranged on the heat radiator at a side far away from the wave-shaped radiation plate, and the flue branch pipe is communicated with a flue; the flue branch pipe and the combustion burner are respectively positioned at two sides of the heat radiator.
6. The internal stress relieving heat treatment device for hot rolled H-section steel as claimed in claim 5, wherein the flue branch pipe and the combustion burner are respectively positioned on both sides of the corrugated radiant panel in the width direction of the heat radiator.
7. The internal stress relief heat treatment device for hot rolled H-section steel according to claim 6, wherein a baffle plate is arranged in the heat radiator at the middle position in the width direction of the wave-shaped radiation plate, one side of the baffle plate is fixedly arranged on the inner wall of the heat radiator at the side far away from the wave-shaped radiation plate, and the side, close to the wave-shaped radiation plate, of the baffle plate is a free end.
8. The internal stress relief heat treatment device for hot rolled H-section steel according to claim 7, wherein the plane of the baffle plate is perpendicular to the inner wall of the heat radiator on one side far away from the corrugated radiation plate, and the corrugated radiation plate is symmetrically arranged with the plane of the baffle plate as a symmetrical plane.
9. The internal stress relieving heat treatment device for hot rolled H-shaped steel according to claim 8, wherein one side of the baffle plate, which is close to the corrugated radiating plate, is positioned on a plane on which two side edges of the corrugated radiating plate in the width direction are positioned.
10. A hot rolled H-section steel internal stress relieving kit comprising a heat treatment apparatus as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321516371.6U CN220335238U (en) | 2023-06-14 | 2023-06-14 | Internal stress eliminating heat treatment device and complete equipment for hot rolled H-shaped steel |
Applications Claiming Priority (1)
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