A screening device and method for producing protective slag

Abstract

The present invention relates to the technical field of protective slag screening, and specifically discloses a screening device and method for producing protective slag, the screening device for producing protective slag comprising a frame and a screen drum, a rotating rod rotatably connected in the screen drum, the rotating rod being connected to a driving component 1, a screen plate and a discharge plate being arranged circumferentially of the rotating rod, the screen holes on adjacent screen plates gradually increase in size along the rotation direction of the rotating rod, a pressing plate rotatably arranged in the screen holes, the pressing plate being connected to a driving component 2; a feed port and a discharge port are provided on the screen drum, when the screen plate enters working area 1 for the first cycle of operation, the driving component 2 drives the front and rear adjacent pressing plates to rotate back and forth in the opposite direction, when the screen plate enters working area 1 for the second cycle of operation, the pressing plate opens the screen hole, and when it moves to working area 2, the pressing plate covers the screen hole. The screening device and method for producing protective slag of the present invention can crush the protective slag agglomerates and squeeze out the protective slag stuck in the screen hole, thereby improving the phenomenon of screen hole blockage.

Description

Technical Field

[0001] The present invention relates to the technical field of protective slag screening, and in particular to a screening device and method for producing protective slag. Background Art

[0002] In the production process of protective slag, the raw materials will form particles of uneven sizes after crushing. Through screening, the crushed protective slag can be graded according to different particle sizes to obtain a finished product that meets the requirements and has consistent particle size.

[0003] The Chinese patent with the announcement number CN115301537B discloses a vibrating screening machine for screening alloy powder and its screening process, including a screen cylinder, the bottom of which is fixedly connected with a plurality of supporting legs, the bottom of which is provided with a through-type discharge port, the left side of the inner upper surface of the screen cylinder is integrally formed with a tilting block 1, the right side of the inner upper surface of the screen cylinder is fixedly integrally formed with a tilting block 2, and the inner side of the screen cylinder is provided with filter screen 1 and filter screen 2. The above patent document effectively screens the alloy powder by shaking filter screen 1 up and down and shaking left and right at the same time, and achieves the effect of multiple screening by filter screen 2, and the filter screen 2 can be disassembled so that the alloy powder on the filter screen 2 can be smoothly taken out, thereby realizing the classification and processing of the alloy powder after screening.

[0004] During the production or use of protective slag, due to long-term exposure to high temperature, high humidity and other environments, or due to improper handling during storage and transportation, agglomeration may occur. The agglomerated protective slag will not only affect its performance, but may also cause wear to the continuous casting equipment, affecting the stability and efficiency of continuous casting production. Therefore, when screening the protective slag, the agglomerates need to be screened out and crushed. Although the above technical solution can screen out the agglomerates during the actual screening process, the agglomerates are easily accumulated on the filter screen or directly blocked, affecting the screening efficiency. After the agglomerates are screened out, they need to be collected and crushed separately, which increases the processing cost and processing time. If the protective slag agglomerates are directly discarded, it will cause a waste of resources.

[0005] Therefore, the art needs a screening device and method for producing protective slag to solve the above problems. Summary of the invention

[0006] The present invention provides a screening device and method for producing protective slag, aiming to solve the problems in the related art that when the screening device is used, protective slag agglomerates are easily accumulated and blocked the filter screen, and the screening device cannot break up the protective slag agglomerates in time.

[0007] On the one hand, the present invention provides a screening device for producing protective slag, comprising a frame and a screen drum arranged on the frame, wherein the axial extension direction of the screen drum is defined as the front-to-back direction, a rotating rod is rotatably connected in the screen drum, the rotating rod is connected to a driving assembly 1 for driving the rotating rod, at least two screen plates are arranged at intervals in the circumference of the rotating rod, and a discharging plate connected to the rotating rod is arranged between two adjacent screen plates, and the size of the screen holes on the adjacent screen plates gradually increases along the rotating direction of the rotating rod, starting from the side of the discharging plate facing the rotating direction of the rotating rod, a pressing plate is rotatably arranged in the screen hole, the rotating axis of the pressing plate extends along the front-to-back direction, and the pressing plate is connected to a driving assembly 2;

[0008] A feed inlet and multiple discharge ports are provided on the screen drum, and a working area one and a working area two are provided inside the screen drum. When the screen plate enters the working area one for the first week of operation, the pressure plate is located on the side of the screen plate toward the rotation direction of the rotating rod, and the driving component two drives the pressure plate on the screen plate to rotate reciprocatingly, and the rotation directions of the two adjacent pressure plates in front and behind are opposite. When the screen plate moves to the working area two, the driving component two drives the pressure plate on the screen plate to cover the screen holes. When the screen plate enters the working area one for the second week of operation, the driving component two drives the pressure plate to fully open the screen holes. When the screen plate moves to the working area two, the pressure plate covers the screen holes.

[0009] The present invention screens the protective slag by rotating the sieve plate in the sieve drum, so that the protective slag can follow the rotation of the sieve plate and roll on the sieve plate, thereby improving the problem that the protective slag clumps are easily accumulated on the sieve plate, causing clogging of the sieve plate and affecting the screening efficiency; and during the rotation of the sieve plate, the driving component 2 drives the front and rear adjacent pressure plates to reciprocate in opposite directions, so that the front and rear adjacent pressure plates can squeeze and shear the protective slag, thereby crushing the protective slag clumps, and there is no need to collect and crush the clumps separately; in addition, when the pressure plate of the present invention covers the sieve hole, it can squeeze out the protective slag stuck in the sieve hole, thereby improving the phenomenon of sieve hole clogging.

[0010] Preferably, the screen plate includes a screen frame, partitions uniformly arranged in the screen frame along the front-to-back direction, and mounting rods uniformly arranged in the screen frame along the radial direction of the screen cylinder. The mounting rods penetrate the partitions along the front-to-back direction and cooperate with the partitions for rotation. The partitions and the mounting rods are arranged to form screen holes. A mounting cylinder is sleeved on the mounting rod, and movable grooves for exposing the mounting rods are provided on the mounting cylinder at intervals along the front-to-back direction. Two adjacent front and rear pressure plates are fixedly connected to the mounting rod through the movable groove, and the other is fixedly connected to the mounting cylinder.

[0011] By connecting the front and rear adjacent pressing plates to the mounting rod and the mounting cylinder respectively, all the pressing plates can be driven to rotate by simply driving the mounting rod and the mounting cylinder to rotate. The structure is ingenious, making the overall structure of the screen plate relatively simple and compact.

[0012] Preferably, the front and rear ends of the rotating rod are respectively fixedly connected with mounting plates, the outer circumference of the mounting plate fits with the inner circumference of the screen cylinder, the front and rear ends of the mounting rod and the mounting cylinder respectively pass through the corresponding mounting plates, and the two ends of the mounting rod are respectively fixedly connected with bevel gear 1, and the two ends of the mounting cylinder are respectively fixedly connected with bevel gear 2, and the driving component 2 drives the bevel gear 1 and bevel gear 2 to rotate to drive the corresponding pressure plate to move.

[0013] Preferably, a mounting plate corresponding to each sieve plate is fixedly connected to the mounting disk, the mounting plate extends radially along the sieve cylinder, and a bevel gear three corresponding to each mounting rod is rotatably connected to the mounting plate, the bevel gear three is located between the corresponding bevel gear one and bevel gear two, and is meshed with the bevel gear one and bevel gear two respectively, and the bevel gear three on the same mounting plate is connected through a transmission assembly, the driving assembly two drives the bevel gear one on one of the mounting rods to rotate, and the bevel gear one drives the corresponding bevel gear two to rotate through the corresponding bevel gear three.

[0014] By setting bevel gear one, bevel gear two and bevel gear three, reverse driving of the mounting rod and the mounting cylinder is realized, and the bevel gear three on the same mounting plate is connected through the transmission assembly. Only one of the bevel gears three needs to be driven to rotate, and the mounting rods and mounting cylinders corresponding to all the bevel gears three can be driven to rotate synchronously.

[0015] Preferably, drive component 2 includes a gear, tooth segment 1 and tooth segment 2, the gear is connected to one of the mounting rods on the screen plate, tooth segment 1 is spaced apart along the inner circumference of the screen cylinder, and mounting rings are respectively connected to the front and rear end surfaces of the screen cylinder facing the mounting plate. Tooth segment 2 is spaced apart along the outer circumference of the mounting ring, and tooth segment 1 and tooth segment 2 are staggered along the rotation direction of the rotating rod. When the gear is meshed with tooth segment 1, it drives the front and rear adjacent pressure plates to rotate away from each other, and when the gear is meshed with tooth segment 2, it drives the front and rear adjacent pressure plates to rotate toward each other.

[0016] Through the staggered tooth segment 1 and tooth segment 2, in the process of alternating meshing of the gear with the tooth segment 1 and tooth segment 2, the front and rear adjacent pressure plates are driven to reciprocate in opposite directions, thereby achieving the extrusion and crushing of the protective slag agglomerates.

[0017] Preferably, drive component two also includes tooth segment three and tooth segment four arranged on the inner circumferential surface of the screen cylinder. When the gear is meshed with tooth segment three, it drives the front and rear adjacent pressure plates to rotate away from each other until they cover the screen holes. When the gear is meshed with tooth segment four, it drives the front and rear adjacent pressure plates to rotate toward the side of the screen plate away from the rotation direction of the rotating rod until the screen holes are fully opened.

[0018] Preferably, driving component 2 also includes tooth segment 5 and tooth segment 6 arranged on the outer circumferential surface of the mounting ring. When the gear is meshed with tooth segment 5, it drives the front and rear adjacent pressure plates to rotate to cover the sieve holes. When the gear is meshed with tooth segment 6, it drives the front and rear adjacent pressure plates to rotate toward the side of the sieve plate toward the rotation direction of the rotating rod. Tooth segment 3 and tooth segment 4 are located on the same circle, tooth segment 5 and tooth segment 6 are located on the same circle, and the circle where tooth segment 3 is located is adjacent to the circle where tooth segment 5 is located in the front-to-back direction. A driving structure for driving the gear to move along the mounting rod is provided in the sieve cylinder. During the first cycle of operation, the gear and tooth segment 3 and tooth segment 4 are located in the same plane of the circle. During the second cycle of operation, the gear and tooth segment 5 and tooth segment 6 are located in the same plane of the circle.

[0019] Preferably, an arc-shaped plate is slidably connected to the mounting ring in the front-to-back direction, a spring is connected between the arc-shaped plate and the corresponding end surface of the screen cylinder, tooth segment six is ​​arranged on the outer periphery of the arc-shaped plate, and during the first cycle of operation, when the gear moves along tooth segment four, the driving structure drives the gear to move along the mounting rod in the direction of extruding the arc-shaped plate.

[0020] Preferably, the end of the mounting rod is fixedly connected to a square shaft, the gear is slidably connected to the square shaft, and the driving structure includes a spiral rod fixedly connected to the gear and a guide plate fixedly connected to the inner circumferential surface of the screen drum. During the movement of the gear along tooth segment four, the spiral rod rotates along the guide plate and drives the gear to move in the direction of the extrusion arc plate. During the movement of the gear along tooth segment six, the spiral rod rotates along the guide plate and drives the gear to move in the direction of the tension spring.

[0021] The driving structure drives the gear to move along the square shaft, so that when the gear is meshed with tooth segment three or tooth segment four, it can avoid tooth segment five and tooth segment six, and when the gear is meshed with tooth segment five or tooth segment six, it can avoid tooth segment three and tooth segment four, thereby ensuring that the gear and the pressure plate can operate normally.

[0022] On the other hand, the present invention further provides a screening method for producing protective slag, wherein the screening method for producing protective slag uses the screening device for producing protective slag according to any one of the above preferred technical schemes, and the screening method for producing protective slag comprises the following steps:

[0023] Put protective slag into the screen drum through the feed port and close the feed port;

[0024] The control driving component 1 drives the rotating rod to rotate. When the screen plate starts the first cycle of operation after entering the working area, the pressure plate is located on the side of the screen plate facing the rotating direction of the rotating rod. The control driving component 2 drives the pressure plate on the screen plate to rotate back and forth, moves the protective slag and squeezes and shears the agglomerates in the protective slag. The protective slag enters different screening areas from the sieve holes. When the screen plate rotates to the working area 2, the control driving component 2 drives the pressure plate on the screen plate to cover the sieve holes to prevent the protective slag from entering the adjacent screening areas from the sieve holes.

[0025] When the screen plate enters working area one for the second week of operation, the control drive component two drives the pressure plate to fully open the screen holes. While the screen plate continues to rotate, the crushed protective slag is screened again. When the screen plate moves to working area two, the control drive component two drives the pressure plate on the screen plate to cover the screen holes. When the screen plate and the discharge plate rotate to correspond to the corresponding discharge port, the discharge port is opened to discharge the protective slag in the corresponding screening area.

[0026] The screening method for producing protective slag of the present invention has the same beneficial effects as the screening device for producing protective slag described above, which will not be described in detail here.

[0027] The beneficial effects of the present invention are:

[0028] (1) The present invention screens the protective slag by rotating the screen plate in the screen drum, so that the protective slag can follow the rotation of the screen plate and roll on the screen plate, thereby improving the problem that the protective slag is easily accumulated on the screen plate, causing the screen plate to be blocked and affecting the screening efficiency;

[0029] (2) During the rotation of the screen plate of the present invention, the driving assembly 2 drives the front and rear adjacent pressing plates to reciprocate in opposite directions, so that the front and rear adjacent pressing plates can squeeze and shear the protective slag, thereby crushing the protective slag agglomerates. There is no need to collect and crush the agglomerates separately, thus saving the screening process and improving the screening efficiency.

[0030] (3) When the pressing plate of the present invention covers the sieve hole, it can squeeze out the protective slag stuck in the sieve hole, improve the clogging phenomenon of the sieve hole, and ensure the normal operation of the sieve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a schematic diagram of the overall structure of a screening device for producing protective slag.

[0032] Figure 2 It is a cross-sectional view of a screening device for producing protective slag according to the present invention.

[0033] Figure 3 The invention discloses an assembly diagram of a sieve plate, a discharging plate, a rotating rod and a mounting plate of a screening device for producing protective slag.

[0034] Figure 4 The invention discloses an assembly diagram of a mounting rod, a mounting cylinder and a pressing plate of a screening device for producing protective slag.

[0035] Figure 5 The present invention is a schematic structural diagram of a mounting cylinder and a pressing plate of a screening device for producing protective slag.

[0036] Figure 6 The present invention is a cross-sectional view of a screen drum of a screening device for producing protective slag Figure 1 .

[0037] Figure 7 The present invention is a schematic diagram of the assembly of a gear and a bevel gear three of a screening device for producing protective slag.

[0038] Figure 8 The present invention is a cross-sectional view of a screen drum of a screening device for producing protective slag Figure 2 .

[0039] Fig. 9 The present invention is a schematic diagram of the assembly of the drive structure and gears of a screening device for producing protective slag. Figure 1 .

[0040] Fig.10 The present invention is a schematic diagram of the assembly of the drive structure and gears of a screening device for producing protective slag. Figure 2 .

[0041] Reference numerals:

[0042] 1. Frame; 2. Screen drum; 21. Rotating rod; 22. Feed inlet; 23. Discharge outlet; 24. Mounting ring; 25. Arc plate; 26. Spring; 3. Screen plate; 31. Screen frame; 32. Partition plate; 33. Mounting rod; 34. Scraper; 35. Bevel gear one; 4. Press plate; 5. Mounting cylinder; 51. Movable groove; 52. Bevel gear two; 6. Mounting plate; 61. Mounting plate; 62. Bevel gear three; 63. Transmission belt; 7. Gear; 71. Tooth segment one; 72. Tooth segment two; 73. Tooth segment three; 74. Tooth segment four; 75. Tooth segment five; 76. Tooth segment six; 8. Spiral rod; 9. Guide plate; 10. Discharge plate. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0044] like Figures 1 to 10 As shown, a screening device for producing protective slag of the present invention comprises a frame 1 and a screen drum 2 arranged on the frame 1, wherein the axial extension direction of the screen drum 2 is defined as the front-to-back direction, the screen drum 2 is slidably connected to the frame 1 along the front-to-back direction, and a driving member (not shown in the figure) for driving the screen drum 2 to reciprocate along the front-to-back direction is provided on the frame 1. As an example, the driving member comprises an electric push rod fixedly connected to the frame 1, and the output end of the electric push rod is fixedly connected to the screen drum 2.

[0045] A rotating rod 21 is rotatably connected inside the screen drum 2, and the rotating rod 21 is connected to a driving assembly 1 (not shown in the figure) that drives it to rotate. As an example, the driving assembly 1 includes a driving motor, and the rotating rod 21 is fixedly connected to the output end of the driving motor. Two sieve plates 3 are arranged at intervals in the circumference of the rotating rod 21, and a discharge plate 10 fixedly connected to the rotating rod 21 is arranged between the two sieve plates 3. The two sieve plates 3 and the discharge plate 10 are evenly distributed along the circumferential intervals of the rotating rod 21. Starting from the side of the discharge plate 10 facing the rotation direction of the rotating rod 21, the size of the sieve holes on the adjacent sieve plates 3 gradually increases along the rotation direction of the rotating rod 21. A pressing plate 4 is rotatably arranged inside the sieve hole, and the rotation axis of the pressing plate 4 extends in the front-to-back direction. The pressing plate 4 is connected to the driving assembly 2.

[0046] The screen drum 2 is provided with a feed port 22 and three discharge ports 23. The screen drum 2 is provided with a working area 1 and a working area 2, the feed port 22 is located in the working area 1, the discharge port 23 is located in the working area 2, and a blocking plate (not shown in the figure) is provided at the feed port 22 and the discharge port 23, respectively. When feeding and discharging are not required, the feed port 22 and the discharge port 23 are blocked by the blocking plate.

[0047] It should be noted that the starting position of the working area 1, i.e., the end position of the working area 2, can range from the position when the sieve plate 3 passes the last discharge port 23 along its rotation direction to any position before the sieve plate 3 rises to a horizontal state along its rotation direction; the end position of the working area 1, i.e., the starting position of the working area 2, can be: the position of the front sieve plate 3 when the protective slag intercepted on the sieve plate 3 can flow to the sieve plate 3 located in front of the sieve plate 3 as the sieve plate 3 rotates. Those skilled in the art can determine the space corresponding to the working area 1 and the working area 2 according to the actual number of sieve plates 3 and the screening effect.

[0048] Three screening areas are formed between adjacent sieve plates 3 and between the discharge plate 10 and the sieve plate 3. When the driving motor drives the rotating rod 21 to rotate and the sieve plate 3 enters the working area 1 for the first cycle of operation, the pressing plate 4 is located on the side of the sieve plate 3 facing the rotation direction of the rotating rod 21. The driving component 2 drives the pressing plate 4 on the sieve plate 3 to rotate back and forth, and the rotation directions of the two adjacent pressing plates 4 are opposite. The pressing plate 4 moves, squeezes and shears the protective slag to crush the slag agglomerates and speed up the screening of the protective slag. When the sieve plate 3 moves to the working area 2, the driving component 2 drives the pressing plate 4 on the sieve plate 3 to cover the sieve holes to prevent the protective slag from entering other screening areas through the sieve holes when the sieve plate 3 rotates from top to bottom, affecting the continued action of the pressing plate 4 on the protective slag. When the sieve plate 3 enters the working area 1 for the second cycle of operation, the driving component 2 drives the pressure plate 4 to fully open the sieve holes, and the crushed protective slag is screened for the second time. The protective slag falls from the sieve holes into different screening areas. When the sieve plate 3 moves to the working area 2, the pressure plate 4 covers the sieve holes. When the sieve plate 3 moves to the corresponding discharge port 23, the discharge port 23 is opened to discharge the protective slag.

[0049] like Figures 2 to 5 As shown, the sieve plate 3 includes a sieve frame 31, a partition plate 32 evenly spaced in the sieve frame 31 along the front-to-back direction, and a mounting rod 33 evenly spaced in the sieve frame 31 along the radial direction of the sieve drum 2. The sieve frame 31 and the end of the discharge plate 10 close to the inner wall of the sieve drum 2 are respectively fixedly connected with a scraper 34 extending in the rotation direction of the rotating rod 21. The mounting rod 33 penetrates the partition plate 32 along the front-to-back direction and rotates with the partition plate 32, and the partition plate 32 and the mounting rod 33 are surrounded to form a sieve hole. The mounting rod 33 is sleeved with a mounting cylinder 5, and the mounting cylinder 5 is provided with movable grooves 51 for exposing the naked mounting rod 33 at intervals along the front-to-back direction. One of the two adjacent pressing plates 4 is fixedly connected to the mounting rod 33 through the movable groove 51, and the other is fixedly connected to the mounting cylinder 5.

[0050] The front and rear ends of the rotating rod 21 are respectively fixedly connected with the mounting plate 6, and the outer periphery of the mounting plate 6 fits with the inner periphery of the screen cylinder 2. The front and rear ends of the mounting rod 33 and the mounting cylinder 5 respectively penetrate the corresponding mounting plates 6, and the two ends of the mounting rod 33 are respectively fixedly connected with the bevel gear 1 35, and the two ends of the mounting cylinder 5 are respectively fixedly connected with the bevel gear 2 52.

[0051] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the mounting plate 6 is fixedly connected with a mounting plate 61 corresponding to each sieve plate 3, and the mounting plate 61 extends in the radial direction of the sieve drum 2. The mounting plate 61 is rotatably connected with a bevel gear 3 62 corresponding to each mounting rod 33. The bevel gear 3 62 is located between the corresponding bevel gear 1 35 and the bevel gear 2 52, and meshes with the bevel gear 1 35 and the bevel gear 2 52 respectively. The bevel gear 3 62 on the same mounting plate 61 is connected by a transmission assembly, and the transmission assembly includes a transmission wheel (not shown in the figure) and a transmission belt 63. The transmission wheel is fixedly connected with the rotating shaft of the bevel gear 3 62, and the transmission belt 63 is arranged around the outer periphery of the transmission wheel of the bevel gear 3 62. Driving component 2 drives the bevel gear 1 35 on one of the mounting rods 33 to rotate, and the bevel gear 1 35 drives the corresponding bevel gear 2 52 to rotate in the opposite direction through the corresponding bevel gear 3 62, and the bevel gear 3 62 drives the bevel gear 3 62 corresponding to the other mounting rods 33 to rotate through the transmission wheel and the transmission belt 63, and the bevel gear 3 62 corresponding to the other mounting rods 33 drives the corresponding bevel gear 1 35 and bevel gear 2 52 to rotate in the opposite direction, thereby driving the front and rear adjacent pressure plates 4 to reciprocate in opposite directions.

[0052] like Figure 4 , Figures 6 to 8As shown, the drive assembly 2 includes a gear 7, a tooth segment 1 71 and a tooth segment 2 72. The gear 7 is connected to the mounting rod 33 on the sieve plate 3 near the inner wall of the sieve drum 2. The tooth segment 1 71 is spaced along the inner circumference of the sieve drum 2 corresponding to the working area 1. The front and rear end surfaces of the sieve drum 2 are respectively fixedly connected with the mounting ring 24 on one side facing the mounting plate 6. The tooth segment 2 72 is spaced along the outer circumference of the mounting ring 24 corresponding to the working area 1, and the tooth segment 1 71 and the tooth segment 2 72 are staggered along the rotation direction of the rotating rod 21. When the gear 7 is meshed with the tooth segment 1 71, the front and rear adjacent pressing plates 4 are driven to rotate in a direction away from each other. When the gear 7 is meshed with the tooth segment 2 72, the front and rear adjacent pressing plates 4 are driven to rotate in a direction close to each other. When the sieve plate 3 enters the working area 1 for the first cycle of operation, the gear 7 is alternately meshed with the tooth segment 1 71 and the tooth segment 2 72, so as to drive the front and rear adjacent pressing plates 4 to reciprocate in opposite directions.

[0053] The drive assembly 2 also includes a tooth segment 3 73 and a tooth segment 4 74 arranged on the inner circumference of the screen drum 2. The tooth segment 3 73 is located in the working area 2 and close to the side of the working area 1 facing the rotation direction of the screen plate 3. The tooth segment 4 74 is located in the working area 1 and close to the side of the working area 2 facing the rotation direction of the screen plate 3. When the gear 7 is meshed with the tooth segment 3 73, the front and rear adjacent pressing plates 4 are driven to rotate in a direction away from each other until the sieve holes are covered. When the gear 7 is meshed with the tooth segment 4 74, the front and rear adjacent pressing plates 4 are driven to rotate toward the side of the screen plate 3 away from the rotation direction of the rotating rod 21 until the sieve holes are fully opened.

[0054] like Figure 6 , Figure 8 and Fig. 9 As shown, the drive assembly 2 also includes a tooth segment 5 75 and a tooth segment 6 76 arranged on the outer peripheral surface of the mounting ring 24, the tooth segment 5 75 is located at a position corresponding to the tooth segment 3 73, and the tooth segment 4 74 and the tooth segment 6 76 are arranged at intervals along the rotation direction of the sieve plate 3. When the gear 7 is meshed with the tooth segment 5 75, the front and rear adjacent pressing plates 4 are driven to rotate to cover the sieve holes, and when the gear 7 is meshed with the tooth segment 6 76, the front and rear adjacent pressing plates 4 are driven to rotate and reset to one side of the sieve plate 3 toward the rotation direction of the rotating rod 21. The tooth segment 1 71, the tooth segment 2 72, the tooth segment 3 73 and the tooth segment 4 74 are located on the same circle, the tooth segment 5 75 and the tooth segment 6 76 are located on the same circle, and the circle where the tooth segment 3 73 is located is adjacent to the circle where the tooth segment 5 75 is located in the front-to-back direction.

[0055] like Fig. 9 and Fig.10As shown, an arc plate 25 is slidably connected to the mounting ring 24 along the front-back direction, a spring 26 is connected between the arc plate 25 and the corresponding end surface of the screen drum 2, tooth segment six 76 is arranged on the outer periphery of the arc plate 25, and an avoidance groove is provided on the arc plate 25. A square shaft is fixedly connected to the end of the mounting rod 33, and the gear 7 is slidably connected to the square shaft. A driving structure for driving the gear 7 to move along the square shaft is arranged in the screen drum 2, and the driving structure includes a spiral rod 8 fixedly connected to the gear 7 and a guide plate 9 fixedly connected to the inner circumference of the screen drum 2. When the screen plate 3 performs the second cycle of operation, during the movement of the gear 7 along the tooth segment four 74, the spiral rod 8 rotates along the guide plate 9 and drives the gear 7 to move in the direction of squeezing the arc plate 25, so that the gear 7 moves to a position on the same circle as the tooth segment five 75, so that when the screen plate 3 continues to rotate to the working area two, the gear 7 can enter the avoidance groove and mesh with the tooth segment five 75. During the movement of the gear 7 along the tooth segment six 76, the spiral rod 8 rotates along the guide plate 9 and drives the gear 7 to move in the direction of the tension spring 26, so that the gear 7 moves to a position on the same circle as the tooth segment three 73, so that during the continuous rotation of the screen plate 3, the gear 7 can alternately mesh with the tooth segment one 71 and the tooth segment two 72.

[0056] A screening method for producing protective slag of the present invention uses the screening device for producing protective slag in the above embodiment. The screening method for producing protective slag of the present invention comprises the following steps:

[0057] In the initial state, the sieve plate 3 with the largest sieve hole is located at the beginning of the working area 1, and protective slag is put into the sieve cylinder 2 through the feed port 22, and the feed port 22 is closed;

[0058] The driving motor is controlled to drive the rotating rod 21 to rotate, and the rotating rod 21 drives the screen plate 3 to rotate. When the screen plate 3 enters the working area 1, the first cycle of operation begins. When the screen plate 3 is located in the working area 1, the pressing plate 4 is located on the side of the screen plate 3 facing the rotating direction of the rotating rod 21, and the gear 7 is alternately meshed with the tooth segment 1 71 and the tooth segment 2 72. The driving mounting rod 33 and the mounting cylinder 5 drive the front and rear adjacent pressing plates 4 to reciprocate in opposite directions. The pressing plate 4 moves the protective slag and squeezes and shears the agglomerates in the protective slag, and the protective slag enters different screening areas from the sieve holes;

[0059] When the screen plate 3 rotates to the working area 2, the gear 7 meshes with the tooth segment 3 73, driving the mounting rod 33 and the mounting cylinder 5 to drive the front and rear adjacent pressing plates 4 to rotate away from each other to cover the screen holes, thereby preventing the protective slag from entering the adjacent screening area from the screen holes;

[0060] When the screen plate 3 enters the working area 1 again for the second cycle of operation, the gear 7 meshes with the tooth segment 4 74, driving the mounting rod 33 and the mounting cylinder 5 to drive the front and rear adjacent pressing plates 4 to rotate to the side away from the rotation direction of the screen plate 3 until the screen hole is fully opened. During the continuous rotation of the screen plate 3, the crushed protective slag is screened again, and the protective slag enters the corresponding screening area from the screen hole, and the gear 7 moves to a position on the same circle with the tooth segment 5 75 under the drive of the driving structure;

[0061] When the sieve plate 3 rotates to the working area 2 again, the gear 7 is meshed with the tooth segment 5 75, driving the mounting rod 33 and the mounting cylinder 5 to drive the front and rear adjacent pressure plates 4 to rotate to cover the sieve holes, and when the sieve plate 3 and the discharge plate 10 are rotated to be opposite to the corresponding discharge port 23, the discharge port 23 is opened to discharge the protective slag in the corresponding screening area, and as the sieve plate 3 continues to rotate, the gear 7 is meshed with the tooth segment 6 76, driving the mounting rod 33 and the mounting cylinder 5 to drive the front and rear adjacent pressure plates 4 to rotate and reset to one side of the rotation direction of the sieve plate 3, and the gear 7 is driven by the driving structure to move to a position on the same circle as the tooth segment 3 73.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A screening device for producing protective slag, comprising a frame (1) and a screen drum (2) arranged on the frame (1), wherein the axial extension direction of the screen drum (2) is defined as a front-to-back direction, and characterized in that: A rotating rod (21) is rotatably connected inside the screen drum (2), and the rotating rod (21) is connected to a driving component 1 for driving the rotating rod (21). At least two screen plates (3) are arranged at intervals in the circumferential direction of the rotating rod (21), and a discharge plate (10) connected to the rotating rod (21) is arranged between two adjacent screen plates (3). Starting from the side of the discharge plate (10) facing the rotating direction of the rotating rod (21), the size of the screen holes on the adjacent screen plates (3) gradually increases along the rotating direction of the rotating rod (21). A pressing plate (4) is rotatably arranged inside the screen hole, and the rotating axis of the pressing plate (4) extends in the front-rear direction. The pressing plate (4) is connected to a driving component 2; The screen drum (2) is provided with a feed inlet (22) and a plurality of discharge outlets (23). A working area 1 and a working area 2 are provided in the screen drum (2). When the screen plate (3) enters the working area 1 for the first cycle of operation, the pressing plate (4) is located on the side of the screen plate (3) in the direction of rotation of the rotating rod (21). The driving component 2 drives the pressing plate (4) on the screen plate (3) to rotate reciprocatingly, and the rotation directions of the two adjacent pressing plates (4) are opposite. When the screen plate (3) moves to the working area 2, the driving component 2 drives the pressing plate (4) on the screen plate (3) to cover the screen holes. When the screen plate (3) enters the working area 1 for the second cycle of operation, the driving component 2 drives the pressing plate (4) to open the screen holes. When the screen plate (3) moves to the working area 2, the pressing plate (4) covers the screen holes. The sieve plate (3) comprises a sieve frame (31), a partition plate (32) evenly spaced in the sieve frame (31) along the front-to-back direction, and a mounting rod (33) evenly spaced in the sieve frame (31) along the radial direction of the sieve cylinder (2); the mounting rod (33) penetrates the partition plate (32) along the front-to-back direction and rotatably cooperates with the partition plate (32); the partition plate (32) and the mounting rod (33) are arranged to form a sieve hole; a mounting cylinder (5) is sleeved on the mounting rod (33); and movable grooves (51) for exposing the naked mounting rod (33) are provided on the mounting cylinder (5) at intervals along the front-to-back direction; two front-to-back adjacent pressing plates (4) one of which passes through the movable groove (51) and is fixedly connected to the mounting rod (33), and the other is fixedly connected to the mounting cylinder (5); The front and rear ends of the rotating rod (21) are respectively fixedly connected to mounting plates (6), the outer circumference of the mounting plate (6) is in contact with the inner circumference of the screen cylinder (2), the front and rear ends of the mounting rod (33) and the mounting cylinder (5) respectively penetrate the corresponding mounting plates (6), and the two ends of the mounting rod (33) are respectively fixedly connected to bevel gear 1 (35), and the two ends of the mounting cylinder (5) are respectively fixedly connected to bevel gear 2 (52), and the driving component 2 drives the bevel gear 1 (35) and the bevel gear 2 (52) to rotate to drive the corresponding pressing plate (4) to move; The mounting plate (6) is fixedly connected to a mounting plate (61) corresponding to each sieve plate (3), the mounting plate (61) extending in the radial direction of the sieve drum (2), and a bevel gear three (62) corresponding to each mounting rod (33) is rotatably connected to the mounting plate (61), the bevel gear three (62) being located between the corresponding bevel gear one (35) and the bevel gear two (52), and meshing with the bevel gear one (35) and the bevel gear two (52) respectively, the bevel gear three (62) on the same mounting plate (61) being connected in transmission through a transmission assembly, the driving assembly two driving the bevel gear one (35) on one of the mounting rods (33) to rotate, and the bevel gear one (35) drives the corresponding bevel gear two (52) to rotate through the corresponding bevel gear three (62); The driving assembly 2 comprises a gear (7), a tooth segment 1 (71) and a tooth segment 2 (72); the gear (7) is connected to one of the mounting rods (33) on the sieve plate (3); the tooth segments 1 (71) are spaced apart along the inner circumference of the sieve cylinder (2); the front and rear end surfaces of the sieve cylinder (2) are respectively connected to mounting rings (24) on one side facing the mounting plate (6); the tooth segments 2 (72) are spaced apart along the outer circumference of the mounting ring (24); and the tooth segments 1 (71) and the tooth segments 2 (72) are alternately arranged along the rotation direction of the rotating rod (21); when the gear (7) is meshed with the tooth segment 1 (71), the front and rear adjacent pressing plates (4) are driven to rotate in a direction away from each other; when the gear (7) is meshed with the tooth segment 2 (72), the front and rear adjacent pressing plates (4) are driven to rotate in a direction approaching each other; The driving assembly 2 further comprises a tooth segment 3 (73) and a tooth segment 4 (74) arranged on the inner circumferential surface of the sieve drum (2); when the gear (7) is meshed with the tooth segment 3 (73), the front and rear adjacent pressing plates (4) are driven to rotate in a direction away from each other until the sieve holes are covered; when the gear (7) is meshed with the tooth segment 4 (74), the front and rear adjacent pressing plates (4) are driven to rotate toward a side of the sieve plate (3) away from the rotation direction of the rotating rod (21) until the sieve holes are fully opened; The drive assembly 2 further comprises a tooth segment 5 (75) and a tooth segment 6 (76) arranged on the outer peripheral surface of the mounting ring (24); when the gear (7) is meshed with the tooth segment 5 (75), the front and rear adjacent pressing plates (4) are driven to rotate until they cover the sieve holes; when the gear (7) is meshed with the tooth segment 6 (76), the front and rear adjacent pressing plates (4) are driven to rotate toward the side of the sieve plate (3) in the direction of rotation of the rotating rod (21); the tooth segment 3 (73) and the tooth segment 4 (74) are located on the same circle; the tooth segment 5 (75) ) and tooth segment six (76) are located on the same circle, the circle where tooth segment three (73) is located is adjacent to the circle where tooth segment five (75) is located in the front-rear direction, a driving structure for driving a gear (7) to move along the mounting rod (33) is provided in the screen drum (2), when the first cycle of operation is performed, the gear (7) and tooth segment three (73) and tooth segment four (74) are located on the same plane of the circle, and when the second cycle of operation is performed, the gear (7) and tooth segment five (75) and tooth segment six (76) are located on the same plane of the circle; An arc plate (25) is slidably connected to the mounting ring (24) in the front-rear direction, a spring (26) is connected between the arc plate (25) and the corresponding end surface of the screen drum (2), tooth segment six (76) is arranged on the outer periphery of the arc plate (25), and during the first cycle of operation, when the gear (7) moves along the tooth segment four (74), the driving structure drives the gear (7) to move along the mounting rod (33) in the direction of squeezing the arc plate (25); The end of the mounting rod (33) is fixedly connected to a square shaft, and the gear (7) is slidably connected to the square shaft. The driving structure comprises a spiral rod (8) fixedly connected to the gear (7) and a guide plate (9) fixedly connected to the inner circumferential surface of the screen drum (2). When the gear (7) moves along the fourth tooth segment (74), the spiral rod (8) rotates along the guide plate (9) and drives the gear (7) to move in the direction of the extrusion arc plate (25). When the gear (7) moves along the sixth tooth segment (76), the spiral rod (8) rotates along the guide plate (9) and drives the gear (7) to move in the direction of the tension spring (26).

2. A screening method for producing mold slag, characterized in that: The screening method for producing protective slag uses the screening device for producing protective slag as described in claim 1, and the screening method for producing protective slag comprises the following steps: Putting protective slag into the screen drum (2) through the feed opening (22), and closing the feed opening (22); The control driving component 1 drives the rotating rod (21) to rotate. When the screen plate (3) enters the working area and starts the first round of operation, the pressing plate (4) is located on the side of the screen plate (3) facing the rotating direction of the rotating rod (21). The control driving component 2 drives the pressing plate (4) on the screen plate (3) to rotate back and forth, moves the protective slag and squeezes and shears the agglomerates in the protective slag. The protective slag enters different screening areas from the sieve holes. When the screen plate (3) rotates to the working area 2, the control driving component 2 drives the pressing plate (4) on the screen plate (3) to cover the sieve holes, thereby preventing the protective slag from entering adjacent screening areas from the sieve holes. When the sieve plate (3) enters the working area 1 for the second cycle of operation, the control drive component 2 drives the pressure plate (4) to fully open the sieve holes. As the sieve plate (3) continues to rotate, the crushed protective slag is screened again. When the sieve plate (3) moves to the working area 2, the control drive component 2 drives the pressure plate (4) on the sieve plate (3) to cover the sieve holes. When the sieve plate (3) and the discharge plate (10) rotate to correspond to the corresponding discharge port (23), the discharge port (23) is opened to discharge the protective slag in the corresponding screening area.

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