CN213538041U - Air slow cooling air knife structure for continuous annealing and cooling of strip - Google Patents
Air slow cooling air knife structure for continuous annealing and cooling of strip Download PDFInfo
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- CN213538041U CN213538041U CN202020237165.1U CN202020237165U CN213538041U CN 213538041 U CN213538041 U CN 213538041U CN 202020237165 U CN202020237165 U CN 202020237165U CN 213538041 U CN213538041 U CN 213538041U
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Abstract
The utility model relates to an air slow cooling air knife structure of continuous annealing cooling usefulness of strip, its characterized in that: comprises an air pipe, wherein 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 front end and the air outlet of the strip-shaped nozzle with the Y-shaped cross section are communicated, 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. Has the characteristics of good stress relief effect, unchanged form and the like.
Description
Technical Field
The utility model relates to an air slow cooling air knife structure 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-.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems that the prior gas cooling structure has uneven cooling of the strip annealing high-temperature section of 1080-900 ℃, poor stress relief effect, easy deformation and the like, and providing an air slow cooling air knife structure for continuous annealing and cooling of strips. 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 utility model can be achieved by adopting the following technical scheme:
the utility model provides an air slow cooling air knife structure of continuous annealing cooling usefulness of strip, its structural feature lies in: comprises an air pipe, wherein 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 utility model can also be achieved by adopting the following technical scheme:
furthermore, the air outlet is formed by strip-shaped notches arranged on the side walls of the air pipes along the length direction, the length dimension of each strip-shaped notch is larger than the width dimension of the workpiece, and the length dimension of each strip-shaped nozzle is equivalent to that of each 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, the front section of the 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 between the connection part of the front section and the rear section is 120-150 degrees, and R arc transition is formed; two ends of the two bent plates are welded through flat plates to form a structure with closed periphery.
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 two ends of the air pipe are respectively provided with a positioning and adjusting structure, so that the air spraying structure for the workpiece can be formed from top to bottom and from bottom to top in practical application, and the distance between the strip-shaped nozzles and the workpiece can be adjusted.
Furthermore, the air outlet is formed by a plurality of air outlet holes which are arranged on the side wall of the air pipe along the length direction and are arranged in a straight line.
The utility model has the following outstanding substantive characteristics and beneficial effect:
the utility model discloses because be equipped with the air outlet along length direction at the lateral wall of tuber pipe, the air outlet comprises the strip notch that sets up along length direction at the lateral wall of tuber pipe or a plurality of exhaust vents that are the linear arrangement, be equipped with two bent plates in air outlet department, through the bent plate encloses to the air outlet and closes, forms the strip spout that the cross section is Y-shaped, the center of the strip spout that the cross section is Y-shaped corresponds with the center of air outlet, forms the air knife structure; 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 problems of uneven cooling at 1080-900 ℃ in the high-temperature section of strip annealing, poor stress relief effect, easy deformation and the like of the existing gas cooling structure can be solved, and the structure has the prominent substantive characteristics and technical progress of even cooling, good stress relief effect, unchanged form and the like of continuous annealing at 1080-900 ℃ in the high-temperature section of strip annealing.
Drawings
Fig. 1 is a front view of the structure of the embodiment of the present invention.
Fig. 2 is a schematic view of the structure in the direction of a-a in fig. 1.
Fig. 3 is an enlarged view of a portion of the structure at X in fig. 2.
FIG. 4 is a schematic view of the structure of FIG. 1 along the direction B-B.
Fig. 5 is a schematic perspective view of an embodiment of the present invention.
Detailed Description
Specific example 1:
referring to fig. 1-5, the present embodiment includes an air duct 1, an air inlet 1-1 is provided at the front end of the air duct 1, and the rear end 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 on the air pipe 1 along the length direction of the air pipe 1 by taking the position of the strip-shaped notch as the center to form a gradually narrowed strip-shaped nozzle 3; the two bent plates 2 are bent inwards, the front section of the 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 at the joint of the front section and the rear section is 135 degrees, and R arc transition is formed; two ends of the two bent plates 2 are welded through the flat plates 4 to form a structure with closed periphery.
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 5mm, 6mm or 7mm for same size W2, guarantee the homogeneity of exit flow.
The two ends of the air pipe 1 are respectively provided with a positioning and adjusting structure 7, so that a workpiece air spraying structure can be formed from top to bottom and from bottom to top in practical application, and the distance between the strip-shaped nozzles 3 and the workpiece can be adjusted.
Specific example 2:
the utility model discloses embodiment 2's characteristics are: the air outlet 1-2 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 1.
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 out of the pipe groove is buffered in the strip-shaped nozzles 3 and then gradually accelerated, and the speed of the air sprayed out of the air knife opening is more uniform and stable; meanwhile, the structure of the strip-shaped nozzles 3 can ensure that cooling air is uniformly sprayed to the surface of the strip at a required speed. The air knife is fixed on the box body through a structure capable of adjusting the vertical position, 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 different strips, and the cooling deformation of the continuous annealing high-temperature section is reduced.
The utility model discloses solve the strip annealing high temperature section (1080) effectively and supple one's hair 900 ℃) cooling deformation problem, reduce the refrigerated internal stress of strip, control the plate-type of strip effectively.
Referring to fig. 1, 2 and 3, the air duct 1 is provided with a notch 1-2 along the length direction and the position direction relative to the workpiece (strip); two bent plates 2 are symmetrically welded on the air pipe 1 along the length direction of the air pipe 1 by taking the position of the notch 1-2 as the center to form a strip-shaped nozzle 3 which is gradually narrowed, and a flat plate 4 and the bent plates 2 are welded on the other two sides to form an air spraying opening with the periphery closed.
Referring to fig. 3, in the middle of the strip-shaped nozzle 3, a plurality of concentric circular holes are formed in the two bent plates at a certain interval along the length direction of the air pipe 1, the positioning piece 5 (round steel) penetrates through the holes of the two bent plates 2, and the strip-shaped nozzle 3 is kept unchanged in shape and size through round steel welding and positioning.
Referring to fig. 3, at the outlet of the strip-shaped nozzle 3, positioning pieces 6 (square steel) are welded at certain intervals and fixed at the air outlet of the strip-shaped nozzle 3, so that an outlet gap W2 formed by the two bent plates 2 confirms the speed uniformity at the outlet.
In this example, the length of the strip-shaped nozzle 3 is greater than the width of the workpiece (strip) to ensure that the strip is sufficiently cooled. The tuber pipe 1 adopts D1 to be DN 200's pipe, and the width W1 of the strip notch that tuber pipe 1 lateral wall set up is 5mm, 6mm or 7mm, the air outlet distance H1 of strip notch to strip spout 3 equals 66 mm. The bent plate with the bending radian of alpha being 135 degrees is welded on the round pipe from the position which is 85mm away from the air outlet H2 of the strip-shaped nozzle 3 to form the strip-shaped nozzle 3 which is gradually narrowed, and the included angle between the strip-shaped nozzles 3 is beta being 20 degrees, so that the width W2 of the air outlet formed by the two bent plates is 5mm, 6mm or 7mm which is equal to W1.
In practical application, 7kpa of 2980m is introduced into the air pipe 13The air enters the strip-shaped nozzles 3 from the strip-shaped notches of the air pipes and is finally sprayed onto the strip surface. Since the width W2 at the outlet of the strip spout 3 is equal to the opening width W1 of the strip notch in the air knife, the speed through the strip notch is equal to the speed through the outlet of the strip spout 3. Referring to the experimental data in fig. 4, the air passes through the strip-shaped notch and then passes through the strip-shaped nozzle 3 which gradually narrows, the air speed is firstly decelerated and then accelerated for the second time, and the air speed gradually rises until the nozzle reaches the set speed value; comparing the speed change at the air pipe notch with the speed change at the strip-shaped nozzle 3, the speed at the position of 10mm passing through the air pipe notch is 73m/s, and the speed is sprayed through the strip-shaped nozzleThe velocity at 10mm of the port 3 was 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.
Claims (7)
1. The utility model provides an air slow cooling air knife structure of continuous annealing cooling usefulness of strip which characterized in that: comprises an air pipe (1), wherein the front end of the air pipe (1) is provided with an air inlet (1-1), and the rear end of the air pipe (1) is closed; an air outlet (1-2) is formed in the side wall of the air pipe (1) along the length direction, the air outlet (1-2) is formed by strip-shaped notches arranged in 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 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 air knife structure for the continuous annealing and cooling of the strip material as claimed in claim 1, wherein: the air outlet (1-2) is formed by strip-shaped notches arranged on the side walls 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.
3. The air slow cooling air knife structure for the continuous annealing and cooling of the strip material 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 air knife structure for the continuous annealing and cooling of the strip material according to claim 1 or 2, characterized in that: the two bent plates (2) are symmetrically welded on the air pipe (1) along the length direction of the air pipe (1) by taking the position of the strip-shaped notch as the 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 between the connection part of the front section and the rear section is 120-150 degrees, and R arc transition is formed; two ends of the two bent plates (2) are welded through the flat plate (4) to form a structure with closed periphery.
5. The air slow cooling air knife structure for the continuous annealing and cooling of the strip material 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 air knife structure for the continuous annealing and cooling of the strip material according to claim 1 or 2, characterized in that: the strip-shaped nozzles are fixed at the outlets of the strip-shaped nozzles (3) by welding a plurality of square steel positioning blocks (6) in a distributed manner so as to ensure that the outlet gaps formed by the two bent plates (2) are all 5-7 mm with the same size W2, and the uniformity of the flow at the outlets is ensured.
7. The air slow cooling air knife structure for the continuous annealing and cooling of the strip material according to claim 1 or 2, characterized in that: the air outlet (1-2) 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020237165.1U CN213538041U (en) | 2020-03-02 | 2020-03-02 | Air slow cooling air knife structure for continuous annealing and cooling of strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020237165.1U CN213538041U (en) | 2020-03-02 | 2020-03-02 | Air slow cooling air knife structure for continuous annealing and cooling of strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213538041U true CN213538041U (en) | 2021-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020237165.1U Active CN213538041U (en) | 2020-03-02 | 2020-03-02 | Air slow cooling air knife structure for continuous annealing and cooling of strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213538041U (en) |
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2020
- 2020-03-02 CN CN202020237165.1U patent/CN213538041U/en active Active
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