CN220461748U - Adjustable air knife side purging device - Google Patents

Abstract

The application relates to an adjustable air knife limit portion sweeps device, include: the fixed platform is of a four-side frame structure, the upper side and the lower side of the inner side of the fixed platform are fixedly connected with transverse width adjusting mechanisms, the left side and the right side of the opposite sides of the transverse width adjusting mechanisms are connected with angle swinging mechanisms, and the opposite ends of the angle swinging mechanisms are connected with pneumatic air knife mechanisms. The device is provided with the angle swinging mechanism in the transverse width adjustment process of the pneumatic air knife, and in the swinging process, after the pneumatic air knife forms a certain angle with the strip steel, the self-locking function of the hollow shaft worm gear reducer is utilized to sweep the surface of the strip steel. The device is additionally provided with a transverse width automatic adjusting mechanism, an output shaft of a servo motor is connected with a trapezoidal screw rod through a second elastic coupler, strip steel width data are transmitted to a second servo motor with width adjustment through a second stage, and an air knife device is used for adjusting the width of the strip steel.

Description

Adjustable air knife side purging device

Technical Field

The application relates to the technical field of steel manufacturing industry, in particular to an adjustable air knife side purging device.

Background

With the increase of competition among domestic iron and steel enterprises, the market has increasingly higher requirements on the product quality, mechanical properties and automation programs of the enterprises. At present, the yield of cold-rolled automobile plates is increasingly increased, and users not only continuously improve the product performance requirements of cold-rolled strip steel, but also put new requirements on the surface cleanliness of the product. In order to ensure the cleanliness of the strip steel, the generation of the surface specks of the strip steel must be controlled.

At present, cleaning devices are arranged in a cold rolling post-treatment production line, and the upper surface and the lower surface of the strip steel are subjected to medium cleaning, so that rolling oil, powder and dust remained in the previous procedure on the surface of the strip steel are eliminated, the surface cleanliness of the strip steel is improved, and the cleaned strip steel is subjected to extrusion, blowing and hot air drying and then enters the subsequent process treatment. From the production condition after the strip steel is cleaned, most of the extrusion device and the blowing device can basically remove cleaning media on the surface of the strip steel, but the end parts on two sides of the strip steel are always provided with water, the phenomenon of non-drying and non-blowing occurs, the phenomenon is more obvious when thick-specification materials are produced, and therefore water can enter the roller surface of the tension roller along with the surface of the strip steel, the strip steel is slipped at the tension roller, and the final quality of products is affected.

The original on-site purging device utilizes a plurality of groups of nozzles fixed at different positions to purge the edge of the strip steel, and when the width of the strip steel changes along with the specification, automatic width adjustment and angle swing cannot be performed. The defects are that: (1) The compressed air utilization rate is low, the energy consumption is high, the purging range is small, and the purging capacity is weak; (2) Each time wide strip steel is produced, automatic width adjustment and angle swing cannot be carried out along with the width of the strip steel;

in the prior art, there are also some adjustable side purging devices, for example, application number CN200720073697.0 proposes a flat rolled strip steel purging device, and a structure of a motor driving a left-right screw is adopted, so that symmetrical movement of nozzles at two ends of the strip steel in the width direction can be realized. Although automation is realized in the width adjustment process, if the center line of the strip steel is required to be completely coincident with a rolling line and the strip steel is deviated, the structure can only ensure the effective blowing of a nozzle at one end, and the other end cannot work normally; meanwhile, the blowing capability of the nozzle structure is weak, and the utilization rate of compressed air is low.

In addition, application number CN201220683199.9 has adopted the structure that both sides nozzle is driven alone, can effectively guarantee like this that both sides nozzle can reach the requirement position, but this structure is complicated, and the sweeping device among the prior art sweeps the effect to belted steel limit portion to sweeping, especially to thick material, belted steel side terminal surface sweeps incompletely during production, forms and remains easily, influences product quality, therefore we propose an adjustable air knife limit portion sweeping device.

Disclosure of Invention

The application provides an adjustable air knife limit portion sweeps device, in order to solve above-mentioned technical problem or at least partly solve above-mentioned technical problem, this application provides an adjustable air knife limit portion sweeps device, includes:

the fixed platform is of a four-side frame structure, the upper side and the lower side of the inner side of the fixed platform are fixedly connected with transverse width adjusting mechanisms, the left side and the right side of the opposite sides of the transverse width adjusting mechanisms are connected with angle swinging mechanisms, and the opposite ends of the angle swinging mechanisms are connected with pneumatic air knife mechanisms.

Optionally, horizontal width adjustment mechanism includes fixed plate, slider, screw nut, backup pad, linear guide, second servo motor, second elastic coupling and left and right sides spiral trapezoidal lead screw, fixed plate fixed connection is on fixed platform, and the equal fixedly connected with locating piece of opposite end of fixed plate to the middle part of locating piece is pegged graft through the bearing and is had left and right sides spiral trapezoidal lead screw, left and right sides has cup jointed screw nut through the screw thread about the spiral trapezoidal lead screw, and screw nut's equal fixedly connected with backup pad of opposite end.

Optionally, the opposite ends of the supporting plate are symmetrically and fixedly connected with sliding blocks, the sliding blocks are movably sleeved on the linear guide rail, and the linear guide rail is fixedly connected to the fixing plate.

Optionally, the left and right sides screw thread direction of left and right spiral trapezoidal lead screw is opposite, and the right-hand member of left and right spiral trapezoidal lead screw all fixedly connected with second elastic coupling, the right-hand member of second elastic coupling all fixedly connected with second servo motor, and second servo motor fixed connection is on the fixed plate.

Optionally, angle swing mechanism includes hollow shaft worm gear reducer, bearing support, first axle end retaining ring, rotation axis, deep groove ball bearing, spacer ring, bearing end cover, second axle end retaining ring, little parallel key and parallel key, hollow shaft worm gear reducer is equipped with four, and the equal fixed connection of hollow shaft worm gear reducer in the backup pad to hollow shaft worm gear reducer's side peg graft has the rotation axis, hollow shaft worm gear reducer is equipped with first axle end retaining ring at the lower extreme of rotation axis, the outside of rotation axis is pegged graft in the installing port of bearing support middle part seting up through the deep groove ball bearing, and the installing port is equipped with the second axle end retaining ring in the upper end of rotation axis, and the upper end of second axle end retaining ring is equipped with the bearing end cover.

Optionally, two deep groove ball bearings are arranged and are sleeved on the outer side of the rotating shaft, a spacer ring is sleeved on the outer side of the rotating shaft between the two deep groove ball bearings, and a flat key and a small flat key are respectively arranged on the outer side of the rotating shaft at the position of being connected with the hollow shaft worm gear reducer and the bearing support in an inserting way.

Optionally, both ends all fixedly connected with bracing piece about the bearing support, and the upper end middle part of bracing piece all fixedly connected with prop up the piece to prop up the upper end fixedly connected with holding ring of piece, the inside activity grafting of holding ring has the runing rest.

Optionally, pneumatic air knife mechanism includes pneumatic air knife, runing rest and jackscrew, the equal fixedly connected with runing rest in opposite end left and right sides of pneumatic air knife, the outer end symmetry fixedly connected with grafting post of runing rest, grafting post activity is pegged graft in the inside of holding ring, the middle part of holding ring runs through and has the jackscrew through the screw thread grafting.

Optionally, a plurality of air outlets are uniformly formed in opposite end parts of the pneumatic air knives, a hollow cavity is formed in the pneumatic air knives, the outer sides of the hollow cavities are connected with air supply equipment through pipelines, four pneumatic air knives are arranged, and strip steel is movably inserted between the four pneumatic air knives.

Optionally, the right-end input shaft of the hollow shaft worm gear reducer is connected with a first servo motor through a first elastic coupling, and the first servo motor is fixedly connected to the supporting plate.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

(1) The device is provided with the angle swinging mechanism in the transverse width adjustment process of the pneumatic air knife, and in the swinging process, after the pneumatic air knife forms a certain angle with the strip steel, the self-locking function of the hollow shaft worm gear reducer is utilized to sweep the surface of the strip steel.

(2) The device is additionally provided with a transverse width automatic adjusting mechanism, a structure that a second servo motor drives a left-right screw rod is adopted, the screw rod is utilized to drive a left-right pneumatic air knife mechanism to realize relative or opposite direction movement to adjust, automatic following of the width of strip steel is realized, edge purging is carried out, an output shaft of the servo motor is connected with a trapezoidal screw rod through a second elastic coupling, strip steel width data is transmitted to the second servo motor of width adjustment through a second stage, and the air knife device is used for adjusting the width of the strip steel.

(3) The pneumatic air knife mechanism is formed by refitting a single air knife, and has the characteristics of stable blowing, wide blowing range and strong blowing capability.

(4) The device has the advantages of high efficiency, reduction of abnormal operation of operators and stable operation, and improves the product quality capacity on the whole.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a front view of the overall structure of one embodiment of an adjustable air knife edge purging device of the present utility model;

FIG. 2 is a left side view of the overall structure of one embodiment of the adjustable air knife edge purging device of the present utility model;

FIG. 3 is an isometric view of the overall structure of the angle swing mechanism of FIG. 2 of the adjustable air knife edge purge apparatus of the present utility model;

FIG. 4 is an interior view of the angle swing mechanism of FIG. 3 of the adjustable air knife edge purge apparatus of the present utility model;

FIG. 5 is a block diagram of a pneumatic knife bearing mount of one embodiment of an adjustable knife edge purge apparatus of the present utility model;

FIG. 6 is a front view of the overall structure of a lateral movement mechanism of one embodiment of an adjustable air knife edge purge device of the present utility model;

FIG. 7 is a cross-sectional top view of the overall structure of the lateral movement mechanism of one embodiment of the adjustable air knife edge purge device of the present utility model.

In the figure: 1. a pneumatic air knife mechanism; 2. an angle swinging mechanism; 3. a lateral width adjustment mechanism; 4. strip steel; 5. a first elastic coupling; 6. a first servo motor; 7. hollow shaft worm gear reducer; 8. a bearing support; 9. a pneumatic air knife; 10. rotating the bracket; 11. a jackscrew; 12. a first shaft end retainer ring; 13. a rotation shaft; 14. deep groove ball bearings; 15. a spacer ring; 16. a bearing end cap; 17. a second shaft end retainer ring; 18. a small flat key; 19. a flat key; 20. a slide block; 21. a lead screw nut; 22. a support plate; 23. a linear guide rail; 24. a second servo motor; 25. a second elastic coupling; 26. left-right spiral trapezoidal screw rod; 27. and fixing the platform.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

Various embodiments of the present application may exist in a range format, and it should be understood that the description in a range format is merely for convenience and brevity and should not be construed as a rigid limitation to the scope of the present application; it is therefore to be understood that the range description has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that a description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5, and 6, wherever applicable. In addition, whenever a numerical range is indicated in this application, it is intended to include any reference to the numbers (fractional or integer) within the indicated range. Unless specifically indicated otherwise, the various raw materials, reagents, instruments, equipment, and the like used in this application are commercially available or may be prepared by existing methods.

In this application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used specifically to refer to the orientation of the drawing in the figures. In addition, in the present application, the terms "include," "include," etc. mean "including but not limited to. In this application, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the present application, "and/or" describing the association relationship of the association object means that there may be three relationships, for example, a and/or B may mean: a alone, a and B together, and B alone. Wherein A, B may be singular or plural. In this application, "at least one" means one or more, and "a plurality" means two or more. "at least one", "at least one" or the like refer to any combination of these items, including any combination of a single item or a plurality of items. For example, "at least one of a, b, or c," or "at least one of a, b, and c," may each represent: a, b, c, a-b, i.e. a and b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple, respectively.

As shown in fig. 1-7, an embodiment of the present application provides an adjustable air knife edge purging device, including:

the fixed platform 27, fixed platform 27 is four sides frame construction, the inboard of fixed platform 27 is all fixedly connected with transverse width adjustment mechanism 3 about, and transverse width adjustment mechanism 3 opposite side's left and right sides all is connected with angle swing mechanism 2 to angle swing mechanism 2's opposite end all is connected with pneumatic air knife mechanism 1.

Specifically: the pneumatic air knife 9 is sleeved on the rotating shaft 13, in order to change the swing angle of the air knife 13 in the blowing process, the bearing support 8 is required to be circumferentially positioned with the rotating shaft 13 through the small flat key 18, and finally the first servo motor 6 drives the input shaft of the hollow shaft worm gear reducer 7 to rotate through the first elastic coupler 5, so that the pneumatic air knife 9 realizes the angle swing function, and the pneumatic air knife mechanism 1 swings left and right through the forward and reverse rotation of the first servo motor 6.

The transverse width automatic adjusting mechanism 3 transmits the second-stage strip steel width data to a second servo motor 24 for width adjustment, and the pneumatic air knife mechanism 1 adjusts the width of the strip steel 4, so that the pneumatic air knife mechanism 1 sweeps the surface of the strip steel 4 along with the change of the strip steel width 4.

As shown in fig. 3: the transverse width adjusting mechanism 3 comprises a fixed plate, a sliding block 20, a screw nut 21, a supporting plate 22, a linear guide rail 23, a second servo motor 24, a second elastic coupler 25 and a left-right spiral trapezoidal screw 26, wherein the fixed plate is fixedly connected to a fixed platform 27, the opposite ends of the fixed plate are fixedly connected with positioning blocks, the middle parts of the positioning blocks are inserted with the left-right spiral trapezoidal screw 26 through bearings, the left-right sides of the left-right spiral trapezoidal screw 26 are sleeved with the screw nut 21 through threads, and the opposite ends of the screw nut 21 are fixedly connected with the supporting plate 22.

The second servomotor 24 is a commercially available motor, which is a prior art device,

as shown in fig. 1 and 4: the opposite ends of the supporting plate 22 are symmetrically and fixedly connected with sliding blocks 20, the sliding blocks 20 are movably sleeved on the linear guide rail 23, and the linear guide rail 23 is fixedly connected to the fixing plate.

As shown in fig. 5: the left side and the right side screw thread direction of the left-right spiral trapezoidal screw rod 26 are opposite, the right ends of the left-right spiral trapezoidal screw rod 26 are fixedly connected with a second elastic coupler 25, the right ends of the second elastic couplers 25 are fixedly connected with a second servo motor 24, and the second servo motor 24 is fixedly connected to a fixed plate.

Specifically: the output shaft of the second servo motor 24 is connected with a left-right spiral trapezoidal screw 26 through a second elastic coupling 25; the screw nut 21 is connected with a left-right spiral trapezoid screw 26 for transmission in a matched mode, the supporting plate 22 is connected with the screw nut 21 through a screw, the sliding block 20 is installed on the supporting plate 22 and matched with the linear guide rail 23, movement of the supporting plate 22 is achieved, the screw nut 21 is driven to move transversely through forward and reverse rotation of the second servo motor 24 in the transverse width adjustment mode of the device, the supporting plate 22 is further enabled to slide back and forth along the linear guide rail 23, the width data of the strip steel 4 are transmitted to the second servo motor 24 in the width adjustment mode through a second stage, and the air knife device is used for adjusting the width of the strip steel 4.

As shown in fig. 5 and 6: the angle swing mechanism 2 comprises four hollow shaft worm gear speed reducers 7, a bearing support 8, a first shaft end check ring 12, a rotating shaft 13, a deep groove ball bearing 14, a spacing ring 15, a bearing end cover 16, a second shaft end check ring 17, a small flat key 18 and a flat key 19, wherein the hollow shaft worm gear speed reducers 7 are fixedly connected to a supporting plate 22, the rotating shaft 13 is inserted into the side edges of the hollow shaft worm gear speed reducers 7, the first shaft end check ring 12 is arranged at the lower end of the rotating shaft 13, the outer side of the rotating shaft 13 is inserted into a mounting opening formed in the middle of the bearing support 8 through the deep groove ball bearing 14, the mounting opening is provided with the second shaft end check ring 17 at the upper end of the rotating shaft 13, the bearing end cover 16 is arranged at the upper end of the second shaft end check ring 17, and the right-end input shaft of the hollow shaft worm gear speed reducer 7 is fixedly connected with a first servo motor 6 through a first elastic coupling 5 and the first servo motor 6 is fixedly connected to the supporting plate 22.

Specifically: the first servo motor 6 adopts the existing motor in the market, is the prior art equipment, the hollow shaft worm gear reducer 7 adopts the existing equipment in the market, is the prior art, the other end of the rotating shaft 13 is installed in the hollow shaft worm gear reducer 7, the flat key 19 is circumferentially adopted to be positioned with the rotating shaft 13, the shaft shoulder of the rotating shaft 13 and the first shaft end check ring 12 are axially adopted to be positioned, the first shaft end check ring 12 is fixed on the other end face of the rotating shaft 13 through a lower positioning screw, the output end of the first servo motor 6 is connected with the hollow shaft worm gear reducer 7 through the first elastic coupling 5, and the hollow shaft worm gear reducer 7 is fixedly connected with the support plate 22 through a screw.

As shown in fig. 4: the two deep groove ball bearings 14 are arranged and are sleeved on the outer side of the rotating shaft 13, a spacing ring 15 is sleeved between the two deep groove ball bearings 14 on the outer side of the rotating shaft 13, and a flat key 19 and a small flat key 18 are respectively arranged on the outer side of the rotating shaft 13 at the inserting connection position of the hollow shaft worm gear reducer 7 and the bearing support 8.

Specifically: the bearing support 8 is connected with the rotating shaft 13 through a small flat key 18, the lower end of the bearing support 8 is positioned through a shaft shoulder of the rotating shaft 13, the upper end of the bearing support 8 is pressed through a deep groove ball bearing 14, a second shaft end check ring 17 is fixed on one end face of the rotating shaft 13 through an upper positioning screw and is contacted with the inner ring of the deep groove ball bearing 14, the rotating shaft 13 is axially positioned, and a bearing end cover 16 is fixed in the bearing support 8 through a screw and axially positions the deep groove ball bearing 14.

As shown in fig. 3, 4 and 5: the left end and the right end of the bearing support 8 are fixedly connected with support rods, the middle part of the upper end of each support rod is fixedly connected with a support block, the upper ends of the support blocks are fixedly connected with positioning rings, and the inside of each positioning ring is movably inserted with a rotating support 10.

Specifically: the upper end of the bearing support 8 is provided with a pneumatic air knife mechanism 1 for supporting.

As shown in fig. 3: the pneumatic air knife mechanism 1 comprises a pneumatic air knife 9, a rotating support 10 and jackscrews 11, wherein the rotating support 10 is fixedly connected to the left side and the right side of the opposite end of the pneumatic air knife 9, plug-in columns are symmetrically and fixedly connected to the outer ends of the rotating support 10, the plug-in columns are movably plugged in the positioning ring, and jackscrews 11 are plugged in the middle of the positioning ring in a penetrating mode through threads.

Specifically: the pneumatic air knife 9 is connected with the rotary support 10 through a bolt, the rotary support 10 is fixedly connected with the bearing support 8 through a jackscrew 11, an artificial adjustment angle can be realized, and after the angle is determined, the air knife is locked through the jackscrew 11.

As shown in fig. 1: the opposite ends of the pneumatic air knives 9 are uniformly provided with a plurality of air outlets, the inside of the pneumatic air knives 9 is provided with a hollow cavity, the outer sides of the hollow cavities are connected with air supply equipment through pipelines, the pneumatic air knives 9 are provided with four, and strip steel 4 is movably inserted between the four pneumatic air knives 9.

Specifically: the strip steel 4 is a processed workpiece, and the upper surface and the lower surface of the strip steel 4 are purged by a pneumatic air knife 9.

When the device is used, the device is arranged on the rear fixing platform 27 of the tension leveler, and the purging work is prepared: firstly, the angle swinging mechanism 2 drives the angle swinging mechanism 2 to swing through the forward rotation of the first servo motor 6 and the first elastic coupling 5 so as to realize the swinging of the pneumatic air knife mechanism 1. When the first servo motor 6 swings to a certain angle, the first servo motor stops working, and the angle swing is stopped.

The second servo motor 24 is connected with the left-right spiral trapezoidal screw 26 through the second elastic coupler 25, the rotation of the second servo motor 24 drives the left-right spiral trapezoidal screw 26 to rotate, the rotation is converted into the movement of the screw nut 21 along the left-right spiral trapezoidal screw 26, and accordingly the supporting plate 22 moves transversely along the linear guide rail 23, the pneumatic air knife mechanisms 1 on two sides simultaneously perform transverse width adjustment, when the transverse width of the pneumatic air knife mechanisms 1 is adjusted to be matched with the width of the strip steel 4, the second servo motor 24 stops working, an external air supply source is opened, and the surface of the strip steel 4 is purged through the pneumatic air knife 9.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An adjustable air knife edge purging device, comprising:

the fixed platform (27), fixed platform (27) is four sides frame construction, the inboard upper and lower side of fixed platform (27) is all fixedly connected with transverse width adjustment mechanism (3), and the left and right sides of transverse width adjustment mechanism (3) opposite side all is connected with angle swing mechanism (2), and the opposite end of angle swing mechanism (2) all is connected with pneumatic air knife mechanism (1).

2. An adjustable air knife edge purge apparatus as claimed in claim 1, wherein: the transverse width adjusting mechanism (3) comprises a fixed plate, a sliding block (20), a screw nut (21), a supporting plate (22), a linear guide rail (23), a second servo motor (24), a second elastic coupler (25) and a left-right spiral trapezoidal screw (26), wherein the fixed plate is fixedly connected to a fixed platform (27), the opposite ends of the fixed plate are fixedly connected with positioning blocks, the middle parts of the positioning blocks are inserted with the left-right spiral trapezoidal screw (26) through bearings, the left-right sides of the left-right spiral trapezoidal screw (26) are sleeved with the screw nut (21) through threads, and the opposite ends of the screw nut (21) are fixedly connected with the supporting plate (22).

3. An adjustable air knife edge purge apparatus as claimed in claim 2, wherein: the opposite ends of the supporting plate (22) are symmetrically and fixedly connected with sliding blocks (20), the sliding blocks (20) are movably sleeved on the linear guide rail (23), and the linear guide rail (23) is fixedly connected to the fixing plate.

4. An adjustable air knife edge purge apparatus as claimed in claim 2, wherein: the left side and the right side of the left-right spiral trapezoidal screw rod (26) are opposite in thread direction, the right ends of the left-right spiral trapezoidal screw rod (26) are fixedly connected with second elastic couplings (25), the right ends of the second elastic couplings (25) are fixedly connected with second servo motors (24), and the second servo motors (24) are fixedly connected to the fixing plates.

5. An adjustable air knife edge purge apparatus as claimed in claim 1, wherein: the angle swing mechanism (2) comprises a hollow shaft worm gear reducer (7), a bearing support (8), a first shaft end retainer ring (12), a rotating shaft (13), deep groove ball bearings (14), a spacer ring (15), bearing end covers (16), a second shaft end retainer ring (17), small flat keys (18) and flat keys (19), the hollow shaft worm gear reducer (7) is provided with four, the hollow shaft worm gear reducer (7) is fixedly connected to a supporting plate (22), the side edges of the hollow shaft worm gear reducer (7) are inserted with the rotating shaft (13), the hollow shaft worm gear reducer (7) is provided with the first shaft end retainer ring (12) at the lower end of the rotating shaft (13), the outer side of the rotating shaft (13) is inserted into a mounting port formed in the middle of the bearing support (8) through the deep groove ball bearings (14), the mounting port is provided with the second shaft end retainer ring (17) at the upper end of the rotating shaft (13), and the upper end of the second shaft end retainer ring (17) is provided with the bearing end covers (16).

6. An adjustable air knife edge purge apparatus as claimed in claim 5, wherein: the two deep groove ball bearings (14) are arranged and are sleeved on the outer sides of the rotating shafts (13), a spacing ring (15) is sleeved between the two deep groove ball bearings (14) on the outer sides of the rotating shafts (13), and flat keys (19) and small flat keys (18) are respectively arranged at the positions of the outer sides of the rotating shafts (13) which are connected with the hollow shaft worm gear reducer (7) and the bearing support (8) in a plugging mode.

7. An adjustable air knife edge purge apparatus as claimed in claim 6, wherein: the left end and the right end of the bearing support (8) are fixedly connected with supporting rods, the middle part of the upper end of each supporting rod is fixedly connected with a supporting block, the upper ends of the supporting blocks are fixedly connected with positioning rings, and a rotating support (10) is movably inserted into the positioning rings.

8. An adjustable air knife edge purge apparatus as claimed in claim 1, wherein: the pneumatic air knife mechanism (1) comprises a pneumatic air knife (9), a rotating support (10) and jackscrews (11), wherein the rotating support (10) is fixedly connected to the left side and the right side of the opposite end of the pneumatic air knife (9), plug-in posts are symmetrically and fixedly connected to the outer end of the rotating support (10), the plug-in posts are movably plugged into the positioning ring, and jackscrews (11) are plugged into the middle of the positioning ring through threads.

9. An adjustable air knife edge purge apparatus as claimed in claim 8, wherein: the pneumatic air knife device is characterized in that a plurality of air outlets are uniformly formed in opposite end parts of the pneumatic air knife (9), a hollow cavity is formed in the pneumatic air knife (9), the outer side of the hollow cavity is connected with air supply equipment through a pipeline, four pneumatic air knives (9) are arranged, and strip steel (4) is movably inserted between the four pneumatic air knives (9).

10. An adjustable air knife edge purge apparatus as claimed in claim 6, wherein: the right-end input shaft of the hollow shaft worm gear reducer (7) is connected with a first servo motor (6) through a first elastic coupler (5), and the first servo motor (6) is fixedly connected to a supporting plate (22).