CN111394568A - Air slow cooling device for continuous annealing and cooling of strip - Google Patents
Air slow cooling device for continuous annealing and cooling of strip Download PDFInfo
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- CN111394568A CN111394568A CN202010137574.9A CN202010137574A CN111394568A CN 111394568 A CN111394568 A CN 111394568A CN 202010137574 A CN202010137574 A CN 202010137574A CN 111394568 A CN111394568 A CN 111394568A
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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
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
Abstract
The invention relates to an air slow cooling device for continuous annealing and cooling of a strip, which is characterized in that: the air slow cooling air knife structure is arranged up and down in the box body to form a bidirectional air slow cooling air spraying structure with a workpiece as a center on the front side and the back side; the air slow cooling air knife structures are connected with the side wall of the box body through the positioning and adjusting structures, each air slow cooling air knife structure comprises an air pipe, the front end of each air pipe is provided with an air inlet, and the rear end of each air pipe is sealed; the side wall of the air pipe is provided with an air outlet along the length direction, the air outlet is formed by strip-shaped notches arranged along the length direction on the side wall of the air pipe or a plurality of air outlet holes arranged in a straight line, two bent plates are arranged at the air outlet, and the bent plates surround the air outlet to form a strip-shaped nozzle with a Y-shaped cross section so as to form an air knife structure; and an air spraying channel is formed in the inner cavity of the strip-shaped nozzle with the Y-shaped cross section. Has the characteristics and the progress of good stress relieving effect, unchanged form and the like.
Description
Technical Field
The invention relates to an air slow cooling device for continuous annealing and cooling of a strip, which is suitable for annealing and cooling of a metal strip. Belongs to the technical field of metallurgy.
Background
With the development of the metal strip mill technology, the strip product is wider and thinner, and the requirement on the shape of the product is higher and higher. For the automobile industry, the flatness of the plate reaches +/-10 IU, and the convexity of the plate reaches 10 mu m, so that the rolling technology has higher requirements; the quality of the plate shape depends on the distribution of residual internal stress of the strip, and the generation of the residual internal stress can be generated in the annealing and cooling process of the strip besides the majority of the residual internal stress from the rolling process; the control of the cooling speed is one of the influencing factors, and in the high-temperature annealing cooling process, the cooling speed and the cross section cooling uniformity are important factors influencing the shape of the plate. In the prior art, a gas cooling mode is generally adopted. However, the prior art has the defect of too fast or too slow gas cooling speed due to unreasonable gas cooling structure, and the problems of uneven cooling, poor stress relief effect, easy deformation and the like are caused by too fast or too slow cooling speed at 1080-.
Disclosure of Invention
The invention aims to solve the problems of uneven cooling at 1080-900 ℃ in a strip annealing high-temperature section, poor stress relief effect, easy deformation and the like of a strip continuous annealing cooling device in the prior art, and provides an air slow cooling device for strip continuous annealing cooling. Has the prominent substantive characteristics and technical progress of uniform cooling, good stress relieving effect, unchanged form and the like of continuous annealing at the high temperature section of 1080-900 ℃ in strip annealing.
The purpose of the invention can be achieved by adopting the following technical scheme:
the utility model provides a strip is air slow cooling device for continuous annealing cooling which structural feature lies in: the air slow cooling air knife structure is arranged up and down in the box body, and air injection ports are opposite to each other to form a bidirectional air slow cooling air injection structure with the front side and the back side centering on a workpiece; the air slow cooling air knife structure is connected with the side wall of the box body through the positioning and adjusting structure, so that the relative positions of the upper air slow cooling air knife structure and the lower air slow cooling air knife structure can be adjusted; each air slow cooling air knife structure comprises an air pipe, the front end of the air pipe is provided with an air inlet, and the rear end of the air pipe is closed; the side wall of the air pipe is provided with an air outlet along the length direction, the air outlet is formed by strip-shaped notches arranged along the length direction on the side wall of the air pipe or a plurality of air outlet holes arranged in a straight line, two bent plates are arranged at the air outlet, the air outlet is enclosed by the bent plates to form a strip-shaped nozzle with a Y-shaped cross section, and the center of the strip-shaped nozzle with the Y-shaped cross section corresponds to the center of the air outlet to form an air knife structure; the inner cavity of the strip-shaped nozzle with the Y-shaped cross section forms an air spraying channel, the front section of the air spraying channel is expanded, the rear section of the air spraying channel is contracted, the front end of the strip-shaped nozzle with the Y-shaped cross section is communicated with an air outlet, and the rear end of the strip-shaped nozzle with the Y-shaped cross section is provided with an air spraying port, so that a slow cooling type air knife structure with the functions of speed reduction and secondary acceleration is formed.
The purpose of the invention can be achieved by adopting the following technical scheme:
furthermore, the air outlet is formed by a strip-shaped notch arranged on the side wall of the air pipe 1 along the length direction or a plurality of air outlet holes arranged in a straight line, the length dimension of the strip-shaped notch is larger than the width dimension of a workpiece, and the length dimension of the strip-shaped nozzle is equivalent to that of the strip-shaped notch; two flat plates are respectively arranged at two ends of the bent plate, and the flat plates and the end parts of the bent plate are welded, sealed and fixedly welded to the air pipes to form the air knife air injection port with the periphery closed.
Further, the width of the strip-shaped notch is W1-5 mm-7mm to correspond to the set speed of air passing through the strip-shaped notch.
Furthermore, the two bent plates are symmetrically welded to the air pipe along the length direction of the air pipe by taking the position of the strip-shaped notch as the center to form a gradually narrowed strip-shaped nozzle, the two bent plates are bent inwards to form an air spraying channel, the front section of the air spraying channel is in a large horn shape, the rear section of the air spraying channel is in a small horn shape, the included angle of the joint of the front section and the rear section is α -150 degrees, R-arc transition is formed, and two ends of the two bent plates are welded through sealing plates to form a structure with the periphery closed.
Furthermore, in the strip-shaped nozzle, a plurality of coaxial circular holes are formed in the middle of the strip-shaped nozzle along the length direction of the air pipe on the two bent plates, and the strip-shaped nozzle is fixedly connected through a round steel positioning block penetrating through the coaxial circular holes of the two bent plates by welding so as to ensure that the size of the strip-shaped nozzle is unchanged.
Furthermore, a plurality of square steel positioning blocks are distributed and welded at the outlet of the strip-shaped nozzle to fix the strip-shaped nozzle, so that the outlet gap formed by the two bent plates is ensured to be the same size W2-5 mm, and the uniformity of the flow at the outlet is ensured.
Furthermore, the positioning and adjusting structures 7 are arranged at two ends of the air duct, and each positioning and adjusting structure comprises one positioning plate and two positioning plates, and each of the one positioning plate and the two positioning plates is provided with an adjusting screw; an angle steel is arranged on the box body, and the adjusting screw penetrates through a through hole of the angle steel and is movably connected with one of the nut connecting positioning plates, the second positioning plate and the four clamping blocks to form an up-and-down adjusting structure; after the two ends of the air pipe are welded and fixed with the first positioning plate and the second positioning plate, the adjusting screw is in threaded connection with the nut through the opening of the angle steel; the first positioning plate and the second positioning plate are respectively connected with the box body through a gasket to form a sealing structure; the clamping blocks are fastened to the box body through bolts to form a positioning structure; and limiting blocks are arranged at the relative positions of the angle steels in the box body to form a limiting structure.
In practical application, the distance between the strip-shaped nozzles and a workpiece (strip) can be adjusted by adjusting the adjusting screw rod, so that the speed of wind sprayed by the strip-shaped nozzles to a strip surface can be adjusted within a certain range, and the adjustment of the cooling speed is realized. The minimum distance of the strip-shaped nozzles relative to the strip is limited by the limiting blocks.
Through location and regulation structure, can from last down and from down up form to work piece gushing wind structure in practical application to the distance of strip spout for the work piece is adjustable.
Furthermore, the two air slow cooling air knife structures supply air in the same direction, one end of the air pipe is provided with an air inlet, and the air inlet end is connected to the box body through one of the positioning plates; the other end of the air pipe is welded and sealed by a sealing plate, a round pipe is welded on the outer side of the sealing plate to be used as a positioning piece, and a plate rib is welded at the joint of the round pipe and the sealing plate to form a reinforced connecting structure; and the round pipe is welded with the inner side of the second positioning plate through the sleeve and is positioned on the box body.
Furthermore, a guide plate is welded in the sleeve, and the sleeve is fixedly connected with the circular tube through the guide plate.
The invention has the following prominent substantive characteristics and beneficial effects:
1. according to the invention, two air slow cooling air knife structures are arranged in the box body, the air slow cooling air knife structures are arranged up and down in the box body, and air injection ports are opposite to each other to form a bidirectional air slow cooling air injection structure with a workpiece as a center and on the front and back sides; the air slow cooling air knife structure is connected with the side wall of the box body through the positioning and adjusting structure, so that the relative positions of the upper air slow cooling air knife structure and the lower air slow cooling air knife structure can be adjusted; each air slow cooling air knife structure comprises an air pipe, the front end of the air pipe is provided with an air inlet, and the rear end of the air pipe is closed; the side wall of the air pipe is provided with an air outlet along the length direction, the air outlet is formed by strip-shaped notches arranged along the length direction on the side wall of the air pipe or a plurality of air outlet holes arranged in a straight line, two bent plates are arranged at the air outlet, the bent plates enclose the air outlet to form a strip-shaped nozzle with a Y-shaped cross section, and the center of the strip-shaped nozzle with the cross section corresponds to the center of the air outlet; an air spraying channel is formed in an inner cavity of a strip-shaped nozzle with a Y-shaped cross section, the front section of the air spraying channel is expanded, the rear section of the air spraying channel is contracted, the front end of the strip-shaped nozzle with the Y-shaped cross section is communicated with an air outlet, and the rear end of the strip-shaped nozzle with the Y-shaped cross section is an air spraying port, so that a slow cooling type air knife structure with the functions of first speed reduction and second speed acceleration; therefore, the cooling device can solve the problems of uneven cooling at 1080-900 ℃ in the strip annealing high-temperature section, poor stress relief effect, easy deformation and the like of the strip continuous annealing cooling device in the prior art, and has the outstanding substantive characteristics and technical progress of even cooling at 1080-900 ℃ in the strip annealing high-temperature section, good stress relief effect, unchanged form and the like.
2. According to the invention, air forms the air knife curtain through the Y-shaped nozzles, and the air is uniformly sprayed onto the strip surface, so that the strip is uniformly cooled in the width direction, and the cooling uniformity of the strip is improved; the strip-shaped nozzles are used for forming an air outlet which is gradually narrowed, so that the air sprayed out of the pipe groove is in a buffered state in the Y-shaped nozzles and then is gradually accelerated, and the speed of the air sprayed out of the air knife opening is more uniform and stable; meanwhile, the strip-shaped nozzle structure is adopted, so that the cooling air can be uniformly sprayed to the surface of the strip at a required speed. The two ends of the air knife are fixed on the box body through the positioning plates which can adjust the up-down positions, the distance from the air injection port to the strip surface can be adjusted at any time according to different strips so as to adjust different cooling speeds required by the different strips, and the cooling deformation of the continuous annealing high-temperature section is reduced.
Drawings
Fig. 1 is a front view of an embodiment of the present invention.
Fig. 2 is a schematic rear view of the present invention.
Fig. 3 is a front view of the air knife structure of the air slow cooling device according to the embodiment of the present invention.
Fig. 4 is a schematic view of the structure in the direction of a-a in fig. 3.
Fig. 5 is an enlarged view of a portion of the structure at X in fig. 4.
Fig. 6 is a schematic view of the structure in the direction B-B of fig. 3.
Fig. 7 is a schematic perspective view of an air slow cooling air knife structure according to an embodiment of the present invention.
FIG. 8 is a graph showing the velocity variation of the workpiece at different distances from the nozzle of the air knife structure in the application of the embodiment of the present invention.
FIG. 9 is a schematic diagram of velocity profiles of different distances between the workpiece and the nozzle of the air knife structure for slow cooling according to an embodiment of the present invention.
FIG. 10 is a schematic diagram of velocity distributions of different distances of the workpiece from the nozzle of the upper air-cooled air-knife structure in an application of the embodiment of the present invention.
FIG. 11 is a graph showing velocity profiles of different distances between a workpiece and a nozzle of a lower air-quench air knife structure in an application of an embodiment of the present invention.
Detailed Description
Specific example 1:
referring to fig. 1 to 7, the present embodiment includes a box 20 and two air slow cooling air knife structures disposed in the box 20, the air slow cooling air knife structures are disposed up and down in the box 20, and air injection openings are opposite to each other to form a bidirectional air slow cooling air injection structure with a workpiece as a center; the air slow cooling air knife structure is connected with the side wall of the box body 20 through a positioning and adjusting structure 7, so that the relative positions of the upper air slow cooling air knife structure and the lower air slow cooling air knife structure can be adjusted; each air slow cooling air knife structure comprises an air pipe 1, the front end of the air pipe 1 is provided with an air inlet 1-1, and the rear end of the air pipe is closed; the air outlet 1-2 is arranged on the side wall of the air pipe 1 along the length direction, the air outlet 1-2 is composed of strip-shaped notches arranged on the side wall of the air pipe 1 along the length direction or a plurality of air outlet holes arranged in a straight line, two bent plates 2 are arranged at the air outlet 1-2, the air outlet 1-2 is enclosed through the bent plates 2 to form a strip-shaped nozzle 3 with a Y-shaped cross section, and the center of the strip-shaped nozzle 3 with the Y-shaped cross section corresponds to the center of the air outlet 1-2 to form an air knife structure; an air spraying channel is formed in the inner cavity of the strip-shaped nozzle 3 with the Y-shaped cross section, the front section of the air spraying channel is expanded, the rear section of the air spraying channel is contracted, the front end of the strip-shaped nozzle 3 with the Y-shaped cross section is communicated with the air outlet 1-2, and the rear end of the strip-shaped nozzle 3 with the Y-shaped cross section is an air spraying port, so that a slow cooling type air knife structure with the functions of first speed reduction and second speed.
In this embodiment:
the air outlet 1-2 is formed by strip-shaped notches arranged on the side wall of the air pipe 1 along the length direction, the length dimension of each strip-shaped notch is larger than the width dimension of a workpiece, and the length dimension of each strip-shaped nozzle 3 is equivalent to that of each strip-shaped notch; two flat plates 4 are respectively arranged at two ends of the bent plate 2, and the flat plates 4 and the end part of the bent plate 2 are welded, sealed and fixedly welded to the air pipe 1 to form an air knife air injection opening with the periphery closed.
The width of the strip-shaped notch is W1 ═ 5mm, 6mm or 7mm, corresponding to the set speed of air passing through the strip-shaped notch.
The two bent plates 2 are symmetrically welded to the air pipe 1 along the length direction of the air pipe 1 by taking the position of a strip-shaped notch as a center to form a gradually narrowed strip-shaped nozzle 3, the two bent plates 2 are bent inwards to form an air spraying channel with a large-horn-shaped front section and a small-horn-shaped rear section, an included angle between the connection part of the front section and the rear section is α -135 degrees and R-arc transition is formed, and two ends of the two bent plates 2 are welded through sealing plates 4 to form a structure with the periphery closed.
In the strip-shaped nozzle 3, a plurality of coaxial circular holes are formed in the middle of the strip-shaped nozzle along the length direction of the air pipe 1 on the two bent plates 2, and the strip-shaped nozzle 3 is fixed by welding through penetrating the coaxial circular holes of the two bent plates 2 through a round steel positioning block 5 so as to ensure that the size of the strip-shaped nozzle 3 is unchanged.
At the exit of strip spout 3, distribute the fixed strip spout 3 of welding a plurality of square steel locating pieces 6 to guarantee that the export clearance that two bent plate 2 formed all is same size W2 ═ 5mm, 6mm or 7mm, should guarantee the homogeneity of exit flow. The air outlet 1-1 is composed of a plurality of air outlet holes which are arranged in a straight line along the length direction on the side wall of the air pipe 1.
The positioning and adjusting structures 7 are arranged at two ends of the air pipe 1, the positioning and adjusting structures 7 comprise a first positioning plate 7-1 and a second positioning plate 7-2, and the first positioning plate 7-1 and the second positioning plate 7-2 are respectively provided with an adjusting screw 7-3; an angle steel 7-5 is arranged on the box body 20, an adjusting screw 7-3 penetrates through a through hole of the angle steel 7-5 and then is connected with a nut 7-4 to be connected with one 7-1 of the positioning plates, and a second 7-2 of the positioning plates is movably connected with four clamping blocks 7-7 to form an up-and-down adjusting structure; after two ends of the air pipe 1 are welded and fixed with the first positioning plate 7-1 and the second positioning plate 7-2, the adjusting screw 7-3 is in threaded connection with the nut 7-4 through an opening of the angle steel 7-5; the first positioning plate 7-1 and the second positioning plate 7-2 are respectively connected with the box body 20 through a gasket 7-6 to form a sealing structure; the clamping blocks 7-7 are fastened to the box body 20 through bolts to form a positioning structure; and the relative position of the angle steel 7-5 in the box body 20 is provided with a limiting block 7-8 to form a limiting structure.
In practical application, the distance between the strip-shaped nozzles 3 and a workpiece (strip) can be adjusted by adjusting the screw rods 7-3, so that the speed of wind sprayed by the strip-shaped nozzles 3 to the strip surface can be adjusted within a certain range, and the adjustment of the cooling speed is realized. The minimum distance of the strip-shaped nozzles 3 relative to the strip is limited by the limiting blocks 7-8.
Through location and regulation structure 7, can from last down and from down up form to work piece gushing air structure in practical application to strip spout 3 is adjustable for the distance of work piece.
The two air slow cooling air knife structures supply air in the same direction, one end of the air pipe 1 is provided with an air inlet, and the air inlet end is connected to the box body 20 through one of the positioning plates 7-1; the other end of the air pipe 1 is welded and sealed by a sealing plate 8, a round pipe 10 is welded on the outer side of the sealing plate 8 to be used as a positioning piece, and a plate rib 9 is welded at the joint of the round pipe 10 and the sealing plate 8 to form a reinforced connection structure; and the circular tube 10 is welded with the inner side of the second positioning plate 7-2 through a sleeve 11 and is positioned on the box body.
A guide plate 12 is welded in the sleeve 11, and the sleeve 11 is fixedly connected with the circular tube 10 through the guide plate 12.
The air duct 1 adopts a round pipe with D1 as DN200, the bending radian of the two bent plates 2 is 135 degrees, the bent plates 2 are welded on the round pipe from a position which is 85mm away from the air outlet H2 of the Y-shaped spout to form a gradually narrowed Y-shaped spout, and the included angle between the Y-shaped spouts is 20 degrees, so that the air outlet width W2 formed by the two bent plates is equal to that of W1, and is 5mm, 6mm or 7 mm.
In practical application, 7kpa and 2980m can be respectively led into the two air pipes 13The air enters the strip-shaped nozzles 3 from the air pipe 1 and is finally sprayed onto the strip surface. Since the width W2 at the outlet of the strip-shaped nozzles 3 is equal to the width W1 of the outlet of the air duct 1 in the air knife, the speed of the air passing through the outlet of the air duct 1 is equal to the speed of the air passing through the strip-shaped nozzles 3. Referring to the experimental data in fig. 4, the air passes through the air outlet of the air pipe 1 and then passes through the strip-shaped nozzles 3 which are gradually narrowed, and the air speed is firstly decelerated and then secondarily accelerated until the nozzles reach the set speed value; comparing the speed change at the air outlet of the air pipe 1 with the speed change at the strip-shaped nozzles 3, the speed at the position of 10mm passing through the notch of the air pipe is 73m/s, and the speed at the position of 10mm passing through the strip-shaped nozzles 3 is 83 m/s; the speed of the air pipe passing through the 15mm position of the air pipe notch is 58m/s, and the speed of the air pipe passing through the 15mm position of the strip-shaped nozzle 3 is 77 m/s; it can be seen that under the condition of the same outlet distance, the speed of the strip-shaped spout 3 is obviously 10-19m/s higher than that of the notch, and the strip-shaped spout 3 is proved to have the effects of secondary acceleration and deceleration.
Specifically, as can be seen from the experimental data shown in fig. 8 to 9, the farther from the strip-shaped nozzles 3, the smaller the wind speed; the change of the wind speed at a distance of 350-125mm from the strip-shaped nozzles is very smooth and is only gradually reduced to 15m/s from 35m/s, the distance of the up-and-down adjustment of the Y-shaped nozzles is 80mm, the smooth and accurate adjustment of the wind spraying speed can be realized, the cooling speed can be effectively controlled according to an annealing process, and the cooling deformation of the high-temperature slow cooling section of the strip can be effectively controlled.
Specifically, referring to the experimental data in fig. 10 and 11, it can be seen that the wind speed distribution in the bandwidth direction at different positions from the nozzle of the wind knife fluctuates only within a range of ± 2m/s, and the wind speeds sprayed by the upper and lower wind knives onto the strip surface are 15 ± 2m/s, which illustrates the cooling uniformity and the uniformity of the cooling rates of the upper and lower wind knives of the present invention, and further effectively controls the cooling deformation of the strip.
The material of the parts used in this embodiment is 304 stainless steel, which increases the durability of the device.
Specific example 2:
the specific embodiment 2 of the present invention is characterized in that: the air outlet 1-1 is composed of a plurality of air outlet holes which are arranged in a straight line along the length direction on the side wall of the air pipe 1. The rest is the same as in embodiment 2.
Through the practical application of the applicant, the air forms the air knife curtain through the strip-shaped nozzles 3, and the air is uniformly sprayed on the strip surface, so that the strip is uniformly cooled in the width direction, and the cooling uniformity of the strip is improved; the strip-shaped nozzles 3 are used for forming an air outlet which is gradually narrowed, so that the air sprayed from the notch of the air pipe is buffered in the strip-shaped nozzles 3 and then gradually accelerated, and the speed of the air sprayed from the air knife opening is more uniform and stable; meanwhile, the Y-shaped nozzle structure is adopted, so that the cooling air can be uniformly sprayed to the surface of the strip at a required speed. The invention can adjust the distance from the air nozzle to the strip surface according to different strips at any time to adjust different cooling rates required by different strips and reduce the cooling deformation of the continuous annealing high-temperature section.
The invention effectively solves the problem of cooling deformation of the strip annealing high-temperature section (1080-.
Claims (10)
1. The utility model provides a strip is air slow cooling device for continuous annealing cooling which characterized in that: the air cooling device comprises a box body (20) and two air slow cooling air knife structures arranged in the box body (20), wherein the air slow cooling air knife structures are arranged up and down in the box body (20), and air injection ports are opposite to each other to form a bidirectional air slow cooling air injection structure with a workpiece as the center; the air slow cooling air knife structure is connected with the side wall of the box body (20) through a positioning and adjusting structure (7), so that the relative position of the upper air slow cooling air knife structure and the lower air slow cooling air knife structure can be adjusted; each air slow cooling air knife structure comprises an air pipe (1), the front end of the air pipe (1) is provided with an air inlet (1-1), and the rear end of the air pipe is closed; the air-jet type air-jet device is characterized in that air outlets (1-2) are formed in the side wall of an air pipe (1) along the length direction, the air outlets (1-2) are formed by strip-shaped notches or a plurality of linearly arranged holes in the side wall of the air pipe (1), two bent plates (2) are arranged at the air outlets (1-2), the air outlets (1-2) are enclosed through the bent plates (2) to form strip-shaped nozzles (3) with Y-shaped cross sections, and the centers of the strip-shaped nozzles (3) with the Y-shaped cross sections correspond to the centers of the air outlets (1-2) to form an air-jet structure; an air spraying channel is formed in the inner cavity of the strip-shaped nozzle (3) with the Y-shaped cross section, the front section of the air spraying channel is expanded, the rear section of the air spraying channel is contracted, the front end of the strip-shaped nozzle (3) with the Y-shaped cross section is communicated with the air outlet (1-2), and the rear end of the strip-shaped nozzle is an air spraying port, so that a slow cooling type air knife structure with the functions of first speed reduction and second speed acceleration is formed.
2. The air slow cooling device for strip continuous annealing cooling according to claim 1, characterized in that: the air outlet (1-2) is composed of a plurality of strip-shaped notches arranged on the side wall of the air pipe (1) along the length direction or a plurality of strip-shaped notches arranged in a linear mode, the length size of each strip-shaped notch is larger than the width size of a workpiece, and the length size of each strip-shaped nozzle (3) is equivalent to that of each strip-shaped notch; two flat plates (4) are respectively arranged at two ends of the bent plate (2), and the flat plates (4) and the end part of the bent plate (2) are welded, sealed and fixedly welded to the air pipe (1) to form an air knife air injection opening with the periphery closed.
3. The air slow cooling device for strip continuous annealing cooling according to claim 1 or 2, characterized in that: the width of the strip-shaped notch is W1-5 mm-7mm, so as to correspond to the set speed of air passing through the strip-shaped notch.
4. The air slow cooling device for the continuous annealing and cooling of the strip according to claim 1 or 2, characterized in that the two bent plates (2) are symmetrically welded to the air pipe (1) along the length direction of the air pipe (1) by taking the position of a strip-shaped notch as a center to form a gradually narrowed strip-shaped nozzle (3), the two bent plates (2) are bent inwards, the front section of a formed air spraying channel is in a large horn shape, the rear section of the formed air spraying channel is in a small horn shape, the included angle of the connection part of the front section and the rear section is α -150 degrees and forms R-arc transition, and two ends of the two bent plates (2) are welded through sealing plates 4 to form a structure with the periphery closed.
5. The air slow cooling device for strip continuous annealing cooling according to claim 1 or 2, characterized in that: in the strip-shaped nozzle (3), a plurality of coaxial circular holes are formed in the middle of the strip-shaped nozzle along the length direction of the air pipe (1) on the two bent plates (2), the strip-shaped nozzle is fixed by welding through the coaxial circular holes penetrating through the two bent plates (2) by using a round steel positioning block (5) so as to ensure that the size of the strip-shaped nozzle (3) is not changed.
6. The air slow cooling device for strip continuous annealing cooling according to claim 1 or 2, characterized in that: at the outlet of the strip-shaped nozzle (3), a plurality of square steel positioning blocks (6) are distributed and welded to fix the strip-shaped nozzle, so that the outlet gaps formed by the two bent plates (2) are ensured to be all 5-7 mm with the same size W2, and the uniformity of the flow at the outlet is ensured.
7. The air slow cooling device for strip continuous annealing cooling according to claim 1 or 2, characterized in that: the air outlet (1-1) is composed of a plurality of air outlet holes which are arranged on the side wall of the air pipe (1) along the length direction and are arranged in a straight line.
8. The air slow cooling device for strip continuous annealing cooling according to claim 1 or 2, characterized in that: the positioning and adjusting structures (7) are arranged at two ends of the air pipe (1), each positioning and adjusting structure (7) comprises one positioning plate (7-1) and two positioning plates (7-2), and each of the one positioning plate (7-1) and the two positioning plates (7-2) is provided with an adjusting screw rod (7-3); an angle steel (7-5) is arranged on the box body (20), an adjusting screw (7-3) penetrates through a through hole of the angle steel (7-5) and then is connected with one (7-1) of the positioning plates connected with a nut (7-4), and the other (7-2) of the positioning plates is movably connected with the four clamping blocks (7-7) to form an up-and-down adjusting structure; after the two ends of the air pipe (1) are welded and fixed with the first positioning plate (7-1) and the second positioning plate (7-2), the adjusting screw (7-3) is in threaded connection with the nut (7-4) through an opening of the angle steel (7-5); the first positioning plate (7-1) and the second positioning plate (7-2) are respectively connected with the box body (20) through a gasket (7-6) to form a sealing structure; the clamping blocks (7-7) are fastened to the box body (20) through bolts to form a positioning structure; the relative position of the angle steel (7-5) in the box body (20) is provided with a limiting block (7-8) to form a limiting structure.
9. The air slow cooling device for strip continuous annealing cooling according to claim 1 or 2, characterized in that: two air slow cooling air knife structures supply air in the same direction, one end of the air pipe (1) is provided with an air inlet, and the air inlet end is connected to the box body (20) through one of the positioning plates (7-1); the other end of the air pipe (1) is welded and sealed by a sealing plate (8), a round pipe (10) is welded on the outer side of the sealing plate (8) to be used as a positioning piece, and a plate rib (9) is welded at the joint of the round pipe (10) and the sealing plate (8) to form a reinforced connection structure; the circular tube (10) is welded on the box body through the sleeve (11) and the inner side of the second positioning plate (7-2).
10. The air slow cooling device for strip continuous annealing cooling according to claim 1 or 2, characterized in that: a guide plate (12) is welded in the sleeve (11), and the sleeve (11) is fixedly connected with the circular tube (10) through the guide plate (12).
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| CN202010137574.9A CN111394568B (en) | 2020-03-02 | 2020-03-02 | Air slow cooling device for continuous annealing and cooling of strip |
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| CN202010137574.9A CN111394568B (en) | 2020-03-02 | 2020-03-02 | Air slow cooling device for continuous annealing and cooling of strip |
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| CN111394568B CN111394568B (en) | 2022-10-28 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW497710U (en) * | 2001-10-16 | 2002-08-01 | Intech Machines Co Ltd | Airing machine for plate-typed objects |
| KR20030047115A (en) * | 2001-12-07 | 2003-06-18 | 주식회사 포스코 | Device for cooling strip in continuous annealing furnace |
| CN101571355A (en) * | 2009-06-01 | 2009-11-04 | 苏州中门子科技有限公司 | Strong loop quick cooling chamber |
| CN103206846A (en) * | 2013-03-22 | 2013-07-17 | 浙江精诚模具机械有限公司 | Air knife |
| CN203672091U (en) * | 2013-12-27 | 2014-06-25 | 宇宙电路板设备(深圳)有限公司 | Water-driving air knife capable of eliminating water-driving blind area |
| CN203960288U (en) * | 2014-06-17 | 2014-11-26 | 肇庆宏旺金属实业有限公司 | The air cooling equipment of annealing furnace |
| CN204019832U (en) * | 2014-08-13 | 2014-12-17 | 江苏安瑞达新材料有限公司 | A kind of malleation air blade device being applicable to lithium battery curtain coating basement membrane and producing |
| CN207823509U (en) * | 2017-12-21 | 2018-09-07 | 东莞市汉克机电科技有限公司 | A kind of adjustable type presses air knife |
-
2020
- 2020-03-02 CN CN202010137574.9A patent/CN111394568B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW497710U (en) * | 2001-10-16 | 2002-08-01 | Intech Machines Co Ltd | Airing machine for plate-typed objects |
| KR20030047115A (en) * | 2001-12-07 | 2003-06-18 | 주식회사 포스코 | Device for cooling strip in continuous annealing furnace |
| CN101571355A (en) * | 2009-06-01 | 2009-11-04 | 苏州中门子科技有限公司 | Strong loop quick cooling chamber |
| CN103206846A (en) * | 2013-03-22 | 2013-07-17 | 浙江精诚模具机械有限公司 | Air knife |
| CN203672091U (en) * | 2013-12-27 | 2014-06-25 | 宇宙电路板设备(深圳)有限公司 | Water-driving air knife capable of eliminating water-driving blind area |
| CN203960288U (en) * | 2014-06-17 | 2014-11-26 | 肇庆宏旺金属实业有限公司 | The air cooling equipment of annealing furnace |
| CN204019832U (en) * | 2014-08-13 | 2014-12-17 | 江苏安瑞达新材料有限公司 | A kind of malleation air blade device being applicable to lithium battery curtain coating basement membrane and producing |
| CN207823509U (en) * | 2017-12-21 | 2018-09-07 | 东莞市汉克机电科技有限公司 | A kind of adjustable type presses air knife |
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| CN111394568B (en) | 2022-10-28 |
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