A high-efficiency screening equipment for blast furnace coke return

Abstract

The present invention discloses an efficient screening device for blast furnace coke return coke, comprising a sieve plate platform for receiving return coke material and performing preliminary screening thereof, a coke dicing fine screening mechanism being provided at the front material outlet of the sieve plate platform for separating coke dicing and coke powder in the return coke. The present invention finely screens the return coke material twice through the sieve plate platform and the coke dicing fine screening mechanism, and can evenly scatter the return coke material on the surface of the screening frame in conjunction with a guiding mechanism. When the coke dicing fine screening mechanism is working, the vibrating cylinder thereon vibrates, and the longitudinally arranged elastic metal sheet and elastic cushion layer are soft connections, and slight deformation and vibration can occur between the structures, so that the coke dicing falls in a uniformly distributed manner. The screening area of ​​the sieve plate is uniform, so that it can withstand long-term wear of coke dicing and coke powder, thereby extending the service life. When the coke dicing contacts the elastic metal sheet, the coke powder adhered thereto can be shaken off and falls from the variable leakage hole. The variable leakage hole is slightly deformed, which can prevent the leakage hole from being blocked, thereby improving the screening efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of coke return screening, in particular to a high-efficiency screening device for blast furnace coke return. Background Art

[0002] During normal blast furnace operation, the coke is screened, and the undersize material is commonly known as return coke. Because the return coke contains a large amount of coke fines, it needs to be further screened before further use to completely separate the coke pieces from the coke fines. This process requires the use of a return coke screening device.

[0003] In the prior art, after the returned coke enters the coke sieve plate, it is concentrated on the coke sieve plate due to the small opening of the discharge pipe, which often leads to material accumulation. In this case, the material usually cannot be screened through the entire sieve plate, but is screened on a small part of the screen surface before entering the coke bin directly. This results in a small screening area and poor screening efficiency. After a long period of local screening, the sieve plate is also prone to local damage due to uneven screening area, resulting in a short service life of the sieve plate. In addition, there is the defect that a large amount of powder enters the coke bin. When this part of the coke dicing with powder enters the furnace, it will cause the blast furnace to have poor performance and serious losses.

[0004] Therefore, it is necessary to develop a high-efficiency screening equipment for blast furnace coke return to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide an efficient screening device for blast furnace coke return. The return coke material is finely screened twice by a screen plate platform and a coke dicing fine screening mechanism. The return coke material can be evenly scattered on the surface of the screening frame in conjunction with a guiding mechanism. When the coke dicing fine screening mechanism is working, the vibrating cylinder on it vibrates, and the longitudinally arranged elastic metal sheet and elastic cushion layer are soft connections. Slight deformation and vibration can occur between the structures, so that the coke dicing falls in a uniformly distributed manner, thereby solving the technical defects raised in the background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A high-efficiency screening device for blast furnace coke return includes a screen plate platform for receiving the return coke material and performing preliminary screening on it. A coke dicing fine screening mechanism is provided at the front material outlet of the screen plate platform for separating coke dices and coke powder in the return coke. The coke dicing fine screening mechanism includes a screening frame, a spring buffer and a vibrating cylinder. The screening frame is tilted and swings in a fan shape around its top hinge point. The spring buffer is padded between the bottom end of the screening frame and a ground support. The vibrating cylinder is installed on the screening frame for transmitting the vibration of the screening frame when it is in operation to screen the return coke.

[0008] The top of the front end of the inner wall of the screen plate platform is fixedly connected to a cross beam, and the front end material output port is located under the cross beam. A guiding mechanism is movably provided on the cross beam for transferring the coke dicing from the screen plate platform to the screening frame, and the guiding mechanism includes a blocking plate for blocking the front end material output port, and the bottom of both ends of the blocking plate are integrally provided with a limiting slide plate, and the limiting slide plate passes through the side wall of the screen plate platform and slides with the through hole, and a plurality of evenly distributed feeding channels are penetrated by the blocking plate. An auger blade is provided in the feeding channel, and J-shaped brackets and L-shaped brackets are respectively installed at both ends of the driving shaft at the center of the auger blade through bearings, and a feeding gap is reserved between the J-shaped bracket and the L-shaped bracket and the auger blade. The L-shaped bracket is fixedly connected to the blocking plate, and the J-shaped bracket is slidably connected to the cross beam. Linear cylinders are installed on the top of both sides of the screen plate platform, and the output shafts of the linear cylinders on both sides abut against both sides of the blocking plate respectively;

[0009] A driving assembly is provided on one side of the guide mechanism close to the screening frame, which is used to enable the driving shaft to drive the auger blades to rotate.

[0010] Preferably, the screening frame includes an elastic metal sheet, a combination rod and an elastic cushion layer. Through holes are provided at both ends of the elastic metal sheet. The number of combination rods is set to two, and the two combination rods are respectively inserted into the through holes at both ends of the elastic metal sheet. Multiple elastic metal sheets are longitudinally arranged in a linear array on the two combination rods. The elastic cushion layer is arranged between two adjacent elastic metal sheets and is movably sleeved on the outside of the combination rod.

[0011] Preferably, the screen plate platform is provided with guard plates on both sides of the front material outlet by screws, the combination rod at the top is coaxially distributed on the hinge point of the screening frame, and its two ends pass through the guard plates and are movably connected to the through holes, and another combination rod is located between the inner sides of the two guard plates;

[0012] Both ends of the outer sides of the two combination rods are provided with external threads, and nuts are connected through the external threads for locking the screening frame. The nut on the top combination rod is located on the outside of the protective baffle, and the nut on the bottom combination rod is located on the inside of the protective baffle.

[0013] Preferably, there is at least one elastic pad layer between two adjacent elastic metal sheets, and the thicknesses of the multiple elastic pad layers are all unit thickness. The combination of the elastic pad layers makes the variable leakage hole width between the two elastic metal sheets adjustable.

[0014] Preferably, the sieve plate platform is configured to be drawer-shaped, and the inner bottom of the sieve plate platform is configured to be a smooth slope, and a plurality of evenly distributed quantitative leakage holes are passed through the bottom wall of the sieve plate platform.

[0015] Preferably, a cover plate is provided on the top of the sieve plate platform, a feed port is passed through the cover plate, and a feeding hopper is detachably mounted on the outside of the feed port.

[0016] Preferably, a collecting box is provided at the bottom of the sieve plate platform, and a movable door panel is provided on the collecting box for easy cleaning, and a carrying plate is movably provided directly below the coke diced fine screen mechanism.

[0017] Preferably, the driving component is configured as a motor, the number of motors is configured as multiple, the multiple motors are fixed on the L-shaped bracket in a one-to-one correspondence, and the motor output shaft is connected to the driving shaft through a coupling.

[0018] Preferably, the drive assembly includes a drive motor and a drive rod, the output shaft of the drive motor is connected to the drive rod, the ends of multiple drive shafts are fixedly connected to driven bevel gears, and the outside of the drive rod is fixedly connected to multiple active bevel gears that correspond one-to-one to the driven bevel gears and are meshed with each other.

[0019] Preferably, the J-shaped bracket is movably connected to the top of the beam, and coaxially distributed threaded holes are provided on both side walls of the top of the J-shaped bracket, and bolts are detachably installed in the threaded holes, and a sliding groove for the bolts to move is provided on the surface of the beam.

[0020] The present invention has the following beneficial effects:

[0021] 1. The returned coke material is finely screened twice by the screen plate platform and the coke dicing fine screening mechanism. The returned coke material can be evenly scattered on the surface of the screening frame in conjunction with the guiding mechanism. When the coke dicing fine screening mechanism is working, the vibrating cylinder on it vibrates, and the longitudinally arranged elastic metal sheet and elastic cushion layer are soft connections. Slight deformation and vibration can occur between the structures, so that the coke dicing is evenly distributed and falls. The screening area of ​​the screen plate is uniform, which makes it easy to withstand long-term wear of coke dicing and coke powder, extending the service life. When the coke dicing contacts the elastic metal sheet, the coke powder adhering to it can be shaken off and falls from the variable leakage hole. The variable leakage hole is slightly deformed, which can prevent the leakage hole from being blocked and improve the screening efficiency.

[0022] 2. By setting up a combined screening frame, an elastic cushion layer is placed between two adjacent elastic metal sheets. By changing the number of layers of the elastic cushion layer and combining its unit thickness, the variable leakage hole width between the two elastic metal sheets can be adjusted, which meets the requirements of efficient screening of materials of different specifications and reduces the equipment procurement cost. After local damage, the damaged local elastic metal sheet can be easily replaced, reducing maintenance costs. Adjustment and replacement can be carried out conveniently and quickly, and the adaptability is significantly improved, which is convenient for promotion and application.

[0023] 3. By setting up a cover to avoid dust, and cooperating with the enclosure baffle, the cleanliness of the workshop can be improved. The screened coke powder can be recycled using a collection box and a carrying plate respectively, which is convenient for reuse and reduces resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of the overall structure of the blast furnace coke return high-efficiency screening equipment provided by the present invention;

[0025] Figure 2 A front view of the high-efficiency screening equipment for blast furnace coke return provided by the present invention;

[0026] Figure 3 A top view of the high-efficiency screening equipment for blast furnace coke return provided by the present invention;

[0027] Figure 4 This is a left view of the high-efficiency screening equipment for blast furnace coke return provided by the present invention;

[0028] Figure 5 For the present invention Figure 4 Schematic diagram of the AA section structure;

[0029] Figure 6 This is a three-dimensional diagram of the combined structure of the sieve plate platform and the guide mechanism in the present invention;

[0030] Figure 7 This is an exploded view of the combined structure of the sieve plate platform and the guide mechanism in the present invention;

[0031] Figure 8 This is a three-dimensional diagram of the combined structure of the enclosure baffle, the bearing plate and the coke dicing fine screen mechanism in the present invention;

[0032] Figure 9 For the present invention Figure 8 A partially cutaway perspective view of the structure shown in FIG;

[0033] Figure 10 This is an exploded view of the combined structure of the enclosure baffle and the coke dicing fine screen mechanism in the present invention;

[0034] Figure 11 It is a three-dimensional diagram of the combined structure of the elastic metal sheet, the combined rod and the elastic cushion layer (in an embodiment with multiple quantities) in the present invention.

[0035] Among them are:

[0036] Screen plate platform-1; coke dicing fine screening mechanism-2; crossbeam-3; guide mechanism-4; enclosure baffle-5; quantitative leak hole-6; cover plate-7; feed port-8; collection box-9; bearing plate-10; drive assembly-11;

[0037] Screening frame-21; Spring buffer-22; Vibrating cylinder-23;

[0038] Blocking plate 41; limiting slide plate 42; feeding channel 43; auger blade 44; drive shaft 45; J-shaped bracket 46; L-shaped bracket 47; linear cylinder 48; 49-bolt; 410-slideway; drive motor 111; drive rod 112; driving bevel gear 113; driven bevel gear 114;

[0039] Elastic metal sheet 211; combination rod 212; elastic cushion layer 213; through hole 214; nut 215; variable leakage hole 216. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0041] In the description of the present invention, it should be understood that the terms "left side," "right side," "upper," "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Terms such as "first" and "second" do not indicate the importance of components and therefore should not be construed as limitations on the present invention. The specific dimensions used in this embodiment are intended only to illustrate the technical solution and do not limit the scope of protection of the present invention.

[0042] like Figure 1-11 As shown, a high-efficiency screening device for blast furnace coke return coke includes a screen plate platform 1 for receiving the return coke material and performing preliminary screening on it. A coke dicing fine screening mechanism 2 is provided at the front material outlet of the screen plate platform 1 for separating coke dices and coke powder in the return coke. The coke dicing fine screening mechanism 2 includes a screening frame 21, a spring buffer 22 and a vibrating cylinder 23. The screening frame 21 is tilted and swings in a fan shape around its top hinge point. The spring buffer 22 is cushioned between the bottom end of the screening frame 21 and the ground support. The ground support described here includes a ground support. The surface and the support placed on the ground, the vibrating cylinder 23 is installed on the screening frame 21, and is used to conduct the vibration of the screening frame 21 when it is working to screen the return focus. The vibrating cylinder 23 used in this embodiment is a prior art and will not be further described in the present invention. It can achieve the vibration effect, such as the WT-ZG series vibration (vibration) cylinder, the number of which can be set to one or more. When installed, it should be placed on the side to avoid obstruction to the sliding of the material; of course, a vibration motor can also be used to replace this solution;

[0043] A crossbeam 3 is fixedly connected to the top of the front end of the inner wall of the sieve plate platform 1. The front end material output port is located below the crossbeam 3. A guide mechanism 4 is movably provided on the crossbeam 3 for transferring the coke pieces from the sieve plate platform 1 to the screening frame 21. The guide mechanism 4 includes a blocking plate 41 for blocking the front end material output port. Both the crossbeam 3 and the blocking plate 41 are made of solid metal.

[0044] The bottom of each end of the blocking plate 41 is integrally provided with a limit slide 42, and the limit slide 42 passes through the side wall of the sieve plate platform 1 and slides with the through hole. The height of the blocking plate 41 is greater than the height of the limit slide 42, and the height of the limit slide 42 is greater than the width of the inner diameter of the front material outlet, and the two limit slides 42 extend out of the sieve plate platform 1, so that the blocking plate 41 and the limit slide 42 can always keep the closed front material outlet in a blocked state during the entire movement process. In this case, the return focus material can only be transferred through the multiple evenly distributed feeding channels 43 provided through the blocking plate 41. The feeding channel 43 is provided with an auger blade 44, and the two ends of the drive shaft 45 at the center of the auger blade 44 are respectively installed with a J-shaped bracket 46 and an L-shaped bracket 47 through bearings. A feeding gap is reserved between the J-shaped bracket 46 and the L-shaped bracket 47 and the auger blade 44. The feeding gap is set to make it easy for the return focus material to enter the feeding channel 43 and be discharged from its interior, thereby improving the transfer efficiency and avoiding the problem of blockage.

[0045] The L-shaped bracket 47 is fixedly connected to the blocking plate 41, and the J-shaped bracket 46 is slidably connected to the crossbeam 3. Linear cylinders 48 are installed on the top of both sides of the screen plate platform 1, and the output shafts of the linear cylinders 48 on both sides are respectively abutted against the two sides of the blocking plate 41. The connecting ends of the linear cylinders 48 on both sides are provided with pneumatic mechanisms for providing kinetic energy, and the pneumatic mechanisms supply air to the linear cylinders 48 on both sides alternately, so that the blocking plate 41 moves back and forth along a straight track, that is, when the output end of the linear cylinder 48 on one side extends, the output end of the linear cylinder 48 on the other side retracts, and the cycle is maintained in this way;

[0046] A drive assembly 11 is provided on one side of the guide mechanism 4 close to the screening frame 21, for causing the drive shaft 45 to drive the auger blade 44 to rotate. With respect to the transmission structure of the drive assembly 11, the present invention provides two specific embodiments:

[0047] Example 1:

[0048] The driving assembly 11 is configured as a motor, and the number of motors is configured as multiple. The multiple motors are fixed on the L-shaped bracket 47 in a one-to-one correspondence, and the motor output shaft is connected to the driving shaft 45 through a coupling.

[0049] Example 2:

[0050] The drive assembly 11 is set as a combined mechanism, which includes a drive motor 111 and a drive rod 112. The output shaft of the drive motor 111 is connected to the drive rod 112. The ends of multiple drive shafts 45 are fixedly connected to driven bevel gears 114. The outer side of the drive rod 112 is fixedly connected to multiple active bevel gears 113 that correspond one-to-one to the driven bevel gears 114 and mesh with the transmission, so that the feeding structure composed of multiple auger blades 44 and the drive shaft 45 can work synchronously. The linkage structure composed of the drive motor 111 and the drive rod 112 can be set to an external type or mounted on multiple L-shaped brackets 47 so that it can move with the guide mechanism 4. During operation, the output shaft of the drive motor 111 transmits the drive rod 112, so that the multiple active bevel gears 113 synchronously transmit the multiple driven bevel gears 114, thereby making the multiple feeding structures feed synchronously. Compared with Example 1, mechanical energy is fully utilized and kinetic energy is saved.

[0051] As a preferred embodiment of the screening frame 21 provided by the present invention, it includes an elastic metal sheet 211, a combination rod 212 and an elastic cushion layer 213. Through holes 214 are provided at both ends of the elastic metal sheet 211. The number of combination rods 212 is set to two, and the two combination rods 212 are respectively inserted into the through holes 214 at both ends of the elastic metal sheet 211. Multiple elastic metal sheets 211 are longitudinally arranged in a linear array on the two combination rods 212. The elastic cushion layer 213 is arranged between two adjacent elastic metal sheets 211 and is movably sleeved on the outside of the combination rod 212.

[0052] Furthermore, in the above technical solution, in order to maintain the stability of the structure of the screening frame 21 after installation, the protective baffles 5 are installed on both sides of the front material outlet of the screen platform 1 by screws, and the combination rod 212 at the top is coaxially distributed on the hinge point of the screening frame 21, and its two ends pass through the protective baffles 5 and are movably connected to the through holes, and another combination rod 212 is located between the inner sides of the two protective baffles 5;

[0053] Both ends of the outer sides of the two combination rods 212 are provided with external threads, and nut pieces 215 are connected through the external threads for locking the screening frame 21. The nut piece 215 on the top combination rod 212 is located on the outer side of the protective baffle 5, and the nut piece 215 on the bottom combination rod 212 is located on the inner side of the protective baffle 5.

[0054] In the above technical solution, in order to maintain the screening accuracy of the screening frame 21, the following improvements are further made:

[0055] There is at least one elastic pad layer 213 between two adjacent elastic metal sheets 211, and the thickness of the plurality of elastic pad layers 213 is unit thickness. The combination of the elastic pad layers 213 makes the width of the variable leakage hole 216 between the two elastic metal sheets 211 adjustable, such as Figure 11As shown, in this embodiment, the number of elastic pad layers 213 provided between two adjacent elastic metal sheets 211 is set to two layers, and the unit thickness thereof is 1 mm. During specific processing, the unit thickness of the elastic pad layer 213 can be adjusted according to actual needs.

[0056] Furthermore, in the above technical solution, the sieve plate platform 1 is configured to be drawer-shaped, and the inner bottom of the sieve plate platform 1 is configured to be a smooth slope. The bottom wall of the sieve plate platform 1 is penetrated by a number of evenly distributed quantitative leakage holes 6, which are used to receive the returned coke material from the side of the sieve plate platform 1 at the top of the bottom wall, and utilize the smooth slope and the gravity of the material to make the material slide down to the front material output port. During this process, the coke powder can fall from the quantitative leakage hole 6 and enter the collection box 9 for collection and preliminary screening. In order to better improve the screening effect, a vibration motor can also be installed on the sieve plate platform 1.

[0057] Furthermore, in the above technical solution, a cover plate 7 is provided on the top of the screen platform 1, a feed port 8 is passed through the cover plate 7, and a feed hopper is detachably installed on the outside of the feed port 8, which can avoid dust and can improve the cleanliness of the workshop together with the protective baffle 5.

[0058] Furthermore, in the above technical solution, a collecting box 9 is provided at the bottom of the screen platform 1, and a movable door panel is provided on the collecting box 9 for easy cleaning. A supporting plate 10 is movably provided directly below the coke fine screening mechanism 2 to facilitate the recovery and utilization of coke powder.

[0059] Furthermore, in an optimized embodiment of the above technical solution, a J-shaped bracket 46 is movably clamped above the crossbeam 3, and coaxially distributed threaded holes are provided on both side walls of the top of the J-shaped bracket 46, and bolts 49 are detachably installed in the threaded holes, and a slide groove 410 for the bolts to move is provided on the surface of the crossbeam 3. This device is convenient for assembly and installation, improves the stability of the guide mechanism 4 during installation and operation, and does not cause movement obstruction.

[0060] The high-efficiency screening equipment for blast furnace coke return provided by the present invention is as follows: when in use, the return coke material is poured into the feeding hopper, and the return coke material enters the screen plate platform 1 from the feeding port 8. Under the gravity potential energy of the falling material, the material collides when it contacts the top of the bottom wall of the screen plate platform 1, and to a certain extent, the coke powder is shaken off the coke pieces. Then, the smooth slope and the gravity of the material are used to make the material slide down to the front material output port. In this process, the coke powder can fall from the quantitative leakage hole 6 and enter the collection box 9 for collection and preliminary screening. The coke pieces are accumulated at the bottom end of the bottom wall of the screen plate platform 1. The material is transferred from the feeding channel 43 to the coke piece fine screening mechanism 2 for further screening through multiple synchronously driven conveying structures. Since the pneumatic mechanism alternately supplies air to the linear cylinders 48 on both sides, the sealing plate 4 1 moves back and forth along a straight track, and multiple conveying structures can evenly sprinkle the material on the surface of the screening frame 21. When the coke diced fine screening mechanism 2 is working, the vibrating cylinder 23 thereon vibrates, and the longitudinally arranged elastic metal sheet 211 and the elastic cushion layer 213 are soft connections. Slight deformation and vibration can occur between the structures, thereby further making the coke diced evenly distributed and falling. When the coke diced contacts the elastic metal sheet 211, the coke powder adhered to it can be shaken off and fall from the variable leakage hole 216 to complete the screening. The variable leakage hole 216 is slightly deformed, which can prevent the leakage hole from being blocked and improve the screening efficiency. Since the screening area of ​​the screen plate in this device is uniform, its service life is long, and after local damage, the damaged local elastic metal sheet 211 is easy to replace, reducing maintenance costs.

[0061] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A high-efficiency screening device for blast furnace coke return, comprising a screen plate platform (1) for receiving the return coke material and performing preliminary screening thereof, characterized in that: A coke dicing fine screening mechanism (2) is provided at the front material outlet of the sieve plate platform (1) for separating coke dicing and coke powder in the returned coke. The coke dicing fine screening mechanism (2) comprises a screening frame (21), a spring buffer (22) and a vibrating cylinder (23). The screening frame (21) is tilted and swings in a fan shape around its top hinge point. The spring buffer (22) is cushioned between the bottom end of the screening frame (21) and a ground support. The vibrating cylinder (23) is installed on the screening frame (21) for transmitting the vibration of the screening frame (21) when it is working to screen the returned coke. A crossbeam (3) is fixedly connected to the top of the front end of the inner wall of the sieve plate platform (1), and a front end material output port is located below the crossbeam (3). A guide mechanism (4) is movably provided on the crossbeam (3) for transferring coke from the sieve plate platform (1) to the sieve frame (21). The guide mechanism (4) includes a blocking plate (41) for blocking the front end material output port. A limiting slide plate (42) is integrally provided at the bottom of both ends of the blocking plate (41), and the limiting slide plate (42) passes through the side wall of the sieve plate platform (1) and is slidably engaged with the through hole. A plurality of evenly distributed feeding channels (43) are provided through the blocking plate (41). An auger blade (44) is provided in the feeding channel (43), and a J-shaped bracket (46) and an L-shaped bracket (47) are respectively installed at both ends of the driving shaft (45) in the center of the auger blade (44) through bearings. A feeding gap is reserved between the J-shaped bracket (46) and the L-shaped bracket (47) and the auger blade (44). The L-shaped bracket (47) is fixedly connected to the blocking plate (41), and the J-shaped bracket (46) is slidably connected to the crossbeam (3). Linear cylinders (48) are installed on the top ends of both sides of the screen plate platform (1), and the output shafts of the linear cylinders (48) on both sides are respectively abutted against both sides of the blocking plate (41); A driving assembly (11) is provided on one side of the guide mechanism (4) close to the screening frame (21), which is used to enable the driving shaft (45) to drive the auger blade (44) to rotate.

2. The high-efficiency screening equipment for blast furnace coke return according to claim 1, characterized in that: The screening frame (21) comprises an elastic metal sheet (211), a combination rod (212) and an elastic cushion layer (213). Through holes (214) are provided at both ends of the elastic metal sheet (211). The number of the combination rods (212) is set to two, and the two combination rods (212) are respectively inserted into the through holes (214) at both ends of the elastic metal sheet (211). A plurality of elastic metal sheets (211) are longitudinally arranged in a linear array on the two combination rods (212). The elastic cushion layer (213) is provided between two adjacent elastic metal sheets (211) and is movably sleeved on the outside of the combination rods (212).

3. The high-efficiency screening equipment for blast furnace coke return according to claim 2, characterized in that: The sieve plate platform (1) is located at the front end of the material outlet and is equipped with a protective baffle (5) on both sides thereof by screws. A combination rod (212) is coaxially distributed on the hinge point of the screening frame (21), and its two ends pass through the protective baffle (5) and are movably connected to the through hole. Another combination rod (212) is located between the inner sides of the two protective baffles (5); External threads are provided at both ends of the outer sides of the two combination rods (212), and nuts (215) are sleeved thereon through the external threads for locking the screening frame (21). The nut (215) on the top combination rod (212) is located on the outer side of the enclosure baffle (5), and the nut (215) on the bottom combination rod (212) is located on the inner side of the enclosure baffle (5).

4. The high-efficiency screening equipment for blast furnace coke return according to claim 2, characterized in that: The number of elastic pad layers (213) between two adjacent elastic metal sheets (211) is at least one, and the thicknesses of the multiple elastic pad layers (213) are all unit thicknesses. The combination of the elastic pad layers (213) enables the width of the variable leakage hole (216) between the two elastic metal sheets (211) to be adjustable.

5. The high-efficiency screening equipment for blast furnace coke return according to claim 1, characterized in that: The sieve plate platform (1) is configured in a drawer shape, and the inner bottom of the sieve plate platform (1) is configured as a smooth slope. The bottom wall of the sieve plate platform (1) is penetrated by a plurality of evenly distributed quantitative leakage holes (6).

6. The high-efficiency screening equipment for blast furnace coke return according to claim 1, characterized in that: A cover plate (7) is provided on the top of the sieve plate platform (1), a feed port (8) is passed through the cover plate (7), and a feeding hopper is detachably mounted on the outside of the feed port (8).

7. The high-efficiency screening equipment for blast furnace coke return according to claim 1, characterized in that: A collecting box (9) is provided at the bottom of the sieve plate platform (1), and a movable door panel is provided on the collecting box (9) for easy cleaning. A carrying plate (10) is movably provided directly below the coke dicing fine screening mechanism (2).

8. The high-efficiency screening equipment for blast furnace coke return according to claim 1, characterized in that: The driving assembly (11) is configured as a motor, and the number of motors is configured as multiple. The multiple motors are fixed on the L-shaped bracket (47) in a one-to-one correspondence, and the motor output shaft is connected to the driving shaft (45) through a coupling.

9. The high-efficiency screening equipment for blast furnace coke return according to claim 1, characterized in that: The drive assembly (11) comprises a drive motor (111) and a drive rod (112); an output shaft of the drive motor (111) is connected to the drive rod (112) in a transmission manner; ends of a plurality of drive shafts (45) are fixedly connected to driven bevel gears (114); and the outer side of the drive rod (112) is fixedly connected to a plurality of driving bevel gears (113) that correspond one-to-one to the driven bevel gears (114) and are meshed with each other for transmission.

10. The high-efficiency screening equipment for blast furnace coke return according to claim 1, characterized in that: The J-shaped bracket (46) is movably connected to the top of the crossbeam (3), and the two side walls of the top of the J-shaped bracket (46) are provided with coaxially distributed threaded holes, and bolts (49) are detachably installed in the threaded holes, and a sliding groove (410) for the bolts to move is provided on the surface of the crossbeam (3).

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