Efficient screening equipment for blast furnace coke return

Abstract

The invention discloses efficient screening equipment for blast furnace returned coke, which comprises a sieve plate platform for receiving returned coke materials and primarily screening the returned coke materials, and a coke nut fine screening mechanism is arranged at a material output port at the front end of the sieve plate platform and is used for separating coke nuts and coke powder in the returned coke. Returned coke materials are finely screened twice through the screen plate platform and the coke nut fine screening mechanism, the returned coke materials can be evenly scattered on the surface of the screening frame in cooperation with the guiding mechanism, when the coke nut fine screening mechanism works, a vibration air cylinder on the coke nut fine screening mechanism vibrates, and longitudinally-arranged elastic metal sheets and an elastic cushion layer are in flexible connection; the structure can slightly deform and vibrate, so that the coke nuts fall in a uniform distribution manner, the screening area of the sieve plate is uniform, long-time abrasion of coke nuts and coke powder can be conveniently resisted, the service cycle is prolonged, when the coke nuts are in contact with the elastic metal sheets, the coke powder adhered to the coke nuts can be shaken off and fall off from the variable leakage holes, and the variable leakage holes slightly deform, so that the coke nuts are prevented from falling off. The leakage holes can be prevented from being blocked, and the screening efficiency is improved.

Description

Technical Field

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

[0002] When the blast furnace is in normal production, the coke is screened and the screened material is commonly known as return coke. Since the return coke contains a large amount of coke powder, it needs to be further screened before further use to completely separate the coke pieces and coke powder. This process requires the use of a return coke screening device.

[0003] In the prior art, after the returned coke enters the coke screen plate, the material is often piled up on the coke screen plate because the discharge pipe opening is small. At this time, the material usually cannot be screened from the entire screen plate, but is screened on a small part of the screen surface, and then directly enters the coke bin, resulting in a small screening area and poor screening efficiency. After a long period of local screening, the screen plate is easily damaged due to uneven screening area, and the service life of the screen plate is short. There is also the defect that a large amount of powder enters the coke bin. After this part of the coke with powder enters the furnace, it will cause the blast furnace to be unsmooth and cause serious losses.

[0004] Therefore, it is necessary to develop an efficient 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 a high-efficiency screening device for blast furnace coke return. The return coke material is finely screened twice by a screen plate platform and a coke diced fine screening mechanism, and the return coke material can be evenly scattered on the surface of the screening frame in conjunction with a guiding mechanism. When the coke diced fine screening mechanism is working, the vibrating cylinder thereon 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 diced falls in a uniformly distributed manner, thereby solving the technical defects proposed 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 coke return from a blast furnace, comprising a screen plate platform for receiving the return coke material and preliminarily screening it, a coke diced fine screening mechanism being provided at the front material outlet of the screen plate platform for separating coke diced and coke powder in the return coke, the coke diced fine screening mechanism comprising a screening frame, a spring buffer and a vibrating cylinder, the screening frame being arranged obliquely and swinging in a fan shape around its top hinge point, the spring buffer being cushioned between the bottom end of the screening frame and a ground support, the vibrating cylinder being installed on the screening frame for conducting the vibration of the screening frame when it is working to screen the return coke;

[0008] The top front end of the inner wall of the sieve plate platform is fixedly connected to a crossbeam, and its front end material output port is located below the crossbeam, and a guiding mechanism is movably arranged on the crossbeam for transferring the coke from the sieve plate platform to the screening frame, and the guiding mechanism comprises a blocking plate for blocking the front end material output port, and the bottoms of both ends of the blocking plate are integrally provided with limiting slides, and the limiting slides penetrate the side walls of the sieve plate platform and slide in cooperation with the through holes, and a plurality of evenly distributed feeding channels are through-arranged on the blocking plate, and auger blades are arranged in the feeding channels, and J-shaped brackets and L-shaped brackets are respectively installed at both ends of the driving shaft at the center of the auger blades through bearings, and a feeding gap is reserved between the J-shaped bracket and the L-shaped bracket and the auger blades, and the L-shaped bracket is fixedly connected to the blocking plate, and the J-shaped bracket is slidably connected to the crossbeam, and linear cylinders are installed on the top ends of both sides of the sieve plate platform, and the output shafts of the linear cylinders on both sides are respectively abutted against both sides of the blocking plate;

[0009] A driving assembly is arranged on one side of the guide mechanism close to the screening frame, and 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, both ends of the elastic metal sheet are provided with through holes, the number of the 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, a plurality of 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 sieve plate platform is provided with guard baffles installed 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 sieve frame, and its two ends penetrate the guard baffles and are movably connected to the through holes, and another combination rod is located between the inner sides of the two guard baffles;

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

[0013] Preferably, the number of elastic pad layers between two adjacent elastic metal sheets is at least one, and the thicknesses of the multiple elastic pad layers are all unit thicknesses. 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 penetrated 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 penetrated through the cover plate, and a feeding hopper is detachably mounted on the outer side of the feed port.

[0016] Preferably, a collecting box is provided at the bottom of the screen platform, and a movable door panel is provided on the collecting box for easy cleaning, and a bearing 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 driving assembly includes a driving motor and a driving rod, the output shaft of the driving motor is connected to the driving rod in a transmission manner, multiple driving shaft ends are fixedly connected to driven bevel gears, and multiple active bevel gears corresponding to the driven bevel gears and meshing with each other are fixedly connected to the outer side of the driving rod.

[0019] Preferably, the J-shaped bracket is movably clamped above the crossbeam, 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 crossbeam.

[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 diced fine screening mechanism. The returned coke material can be evenly scattered on the surface of the screening frame with the guidance mechanism. When the coke diced fine screening mechanism is working, the vibrating cylinder on it vibrates, and the elastic metal sheet and elastic cushion layer arranged longitudinally are soft connections. Slight deformation and vibration can occur between the structures, so that the coke diced falls in a uniform distribution. The screening area of ​​the screen plate is uniform, which is convenient for withstanding the long-term wear of coke diced coke powder and extending the service life. When the coke diced contacts the elastic metal sheet, the coke powder adhered 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, and the number of layers of the elastic cushion layer can be changed to make the variable leakage hole width between the two elastic metal sheets adjustable by combining the unit thickness, so as to meet the efficient screening of materials of different specifications and reduce the equipment procurement cost. After local damage, it is convenient to replace the damaged local elastic metal sheet, reduce the maintenance cost, and can be adjusted and replaced conveniently and quickly, with significantly improved adaptability and easy promotion and application;

[0023] 3. By setting up a cover plate to avoid dust, and cooperating with a protective baffle, the cleanliness of the workshop can be improved. The screened coke powder can be recycled using a collection box and a carrying plate to facilitate reuse and reduce 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 a high-efficiency screening device for blast furnace coke return provided by the present invention;

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

[0027] Figure 4 A left view of the blast furnace coke return high-efficiency screening device provided by the present invention;

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

[0029] Figure 6 It 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 It is an exploded view of the combined structure of the sieve plate platform and the guide mechanism in the present invention;

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

[0032] Fig. 9 For the present invention Figure 8 A partially cutaway structural stereogram of the structure shown in;

[0033] Fig.10 It is an exploded view of the combined structure of the enclosure baffle and the coke fine screen mechanism in the present invention;

[0034] Fig.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 a plurality of embodiments) in the present invention.

[0035] Among them are:

[0036] Screen plate platform-1; coke diced 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; driving shaft-45; J-shaped bracket-46; L-shaped bracket-47; linear cylinder-48; 49-bolt; 410-slideway; driving motor-111; driving 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 piece-215; variable leakage hole-216. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with 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 part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating 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 coke return from a blast furnace comprises a screen plate platform 1 for receiving the return coke material and preliminarily screening it, a coke diced fine screening mechanism 2 is provided at the material outlet at the front end of the screen plate platform 1 for separating coke diced and coke powder in the return coke, the coke diced 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, and the ground support described herein comprises a ground support. The vibrating cylinder 23 is installed on the screening frame 21 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 only needs to be able to 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, and its front end material output port is located below the crossbeam 3. A guide mechanism 4 is movably arranged on the crossbeam 3, which is used to transfer the coke 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. The crossbeam 3 and the blocking plate 41 are both made of solid metal.

[0044] The bottom of both ends of the blocking plate 41 are integrally provided with a limiting slide 42, and the limiting slide 42 penetrates 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 limiting slide 42, and the height of the limiting slide 42 is greater than the width of the inner diameter of the front end material output port, and the two limiting slides 42 extend out of the sieve plate platform 1, so that the blocking plate 41 and the limiting slide 42 can always keep the closed front end material output port in a blocked state during the entire movement process. In this case, the return coke material can only be transferred through a plurality of evenly distributed feeding channels 43 through the blocking plate 41, and an auger blade 44 is provided in the feeding channel 43, and the two ends of the driving 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, and a feeding gap is reserved between the J-shaped bracket 46 and the L-shaped bracket 47 and the auger blade 44, and the feeding gap is set to facilitate the return coke material to enter the feeding channel 43 and be discharged from the inside thereof, 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, the J-shaped bracket 46 is slidably connected to the crossbeam 3, and 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, and the connecting ends of the linear cylinders 48 on both sides are provided with pneumatic mechanisms for providing kinetic energy, and the pneumatic mechanisms alternately supply air to the linear cylinders 48 on both sides, so that the blocking plate 41 reciprocates along a linear trajectory, 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 driving assembly 11 is provided on one side of the guide mechanism 4 close to the screening frame 21, and is used to make the driving shaft 45 drive the auger blade 44 to rotate. With respect to the transmission structure of the driving assembly 11, the present invention provides two specific embodiments:

[0047] Embodiment 1:

[0048] The driving assembly 11 is configured as a motor, and the number of the motors is configured as a plurality, and the plurality of 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] Embodiment 2:

[0050] The driving assembly 11 is set as a combined mechanism, which includes a driving motor 111 and a driving rod 112. The output shaft of the driving motor 111 is connected to the driving rod 112. The ends of multiple driving shafts 45 are fixedly connected with driven bevel gears 114. The outer side of the driving rod 112 is fixedly connected with multiple active bevel gears 113 which correspond to the driven bevel gears 114 one by one and mesh with each other. The feeding structure composed of multiple auger blades 44 and the driving shaft 45 can work synchronously. The linkage structure composed of the driving motor 111 and the driving rod 112 can be set to an external type or mounted on multiple L-shaped brackets 47 so that it can move with the guiding mechanism 4. When working, the output shaft of the driving motor 111 drives the driving rod 112, so that the multiple active bevel gears 113 synchronously drive the multiple driven bevel gears 114, so that the multiple feeding structures can 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 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 arranged between two adjacent elastic metal sheets 211, and is movably sleeved on the outside of the combination rod 212.

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

[0053] External threads are provided at both ends of the outer sides of the two combination rods 212, and nuts 215 are connected 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 protective baffle 5, and the nut 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] The number of elastic pads 213 between two adjacent elastic metal sheets 211 is at least one, and the thickness of the plurality of elastic pads 213 is unit thickness. The combination of the elastic pads 213 makes the width of the variable leakage hole 216 between the two elastic metal sheets 211 adjustable, such as Fig.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 located 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 penetrated through the cover plate 7, and a feeding hopper is detachably installed on the outer side of the feed port 8, which can avoid dust, and the protective baffle 5 can improve the cleanliness of the workshop.

[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 thereof, and a supporting plate 10 is movably provided directly below the coke fine screening mechanism 2 for easy 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 on the top of 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 easy to combine and install, improves the stability of the guide mechanism 4 during installation and operation, and does not cause movement obstruction.

[0060] When in use, the high-efficiency screening equipment for coke return from a blast furnace provided by the present invention pours the returned coke material into the feeding hopper, and the returned coke material enters the screen plate platform 1 from the feeding port 8. Under the gravity potential energy of falling, 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 then be initially screened. 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 reciprocates along a straight track, and multiple conveying structures can evenly sprinkle the material on the surface of the screening frame 21. When the coke fine screening mechanism 2 is working, the vibrating cylinder 23 thereon vibrates, and the elastic metal sheet 211 and the elastic cushion layer 213 arranged longitudinally are soft connections. Slight deformation and vibration can occur between the structures, thereby further making the coke evenly distributed and falling. When the coke 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 the device is uniform, its service life is long, and after local damage, it is convenient to replace the damaged local elastic metal sheet 211, thereby reducing the maintenance cost.

[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. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and 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 diced fine screening mechanism (2) is provided at the front material outlet of the sieve plate platform (1) for separating coke diced and coke powder in the returned coke. The coke diced 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 outlet is located below the crossbeam (3). A guide mechanism (4) is movably arranged on the crossbeam (3) for transferring coke from the sieve plate platform (1) to the sieve frame (21). The guide mechanism (4) comprises a blocking plate (41) for blocking the front end material outlet. Limiting slide plates (42) are integrally arranged at the bottom of both ends of the blocking plate (41), and the limiting slide plates (42) penetrate the side wall of the sieve plate platform (1) and slideably cooperate with the through hole. A plurality of evenly distributed feeding channels (43) are arranged through the blocking plate (41). An auger blade (44) is arranged in the feeding channel (43), and a J-shaped bracket (46) and an L-shaped bracket (47) are respectively installed at both ends of a driving shaft (45) in the center of the auger blade (44) through bearings, and 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), and linear cylinders (48) are installed at 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), and is used to enable the driving shaft (45) to drive the auger blade (44) to rotate.

2. A blast furnace coke return high efficiency screening device 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); both ends of the elastic metal sheet (211) are provided with through holes (214); 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 arranged between two adjacent elastic metal sheets (211) and is movably sleeved on the outside of the combination rod (212).

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

4. A blast furnace coke return high efficiency screening device 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 thickness of the plurality of elastic pad layers (213) is unit thickness. 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 surface, and a plurality of evenly distributed quantitative leakage holes (6) are penetrated through the bottom wall of the sieve plate platform (1).

6. The high-efficiency screening equipment for blast furnace coke return according to claim 1, characterized in that: A cover plate (7) is arranged 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 arranged at the bottom of the sieve plate platform (1), and a movable door panel is provided on the collecting box (9) for easy cleaning thereof. A carrying plate (10) is movably arranged directly below the coke diced 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, the number of motors is configured as a plurality, the plurality of 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); the output shaft of the drive motor (111) is connected to the drive rod (112) in a transmission manner; the ends of the 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) which correspond one to one with 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 clamped on the top of the cross beam (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 cross beam (3).

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