Automatic screening equipment for preparing alumina carrier

Abstract

The present invention discloses an automatic screening device for preparing an alumina carrier, and the present invention relates to the technical field of alumina carrier processing. The automatic screening device for preparing an alumina carrier comprises a workbench, the upper end surface of the workbench is fixedly connected to a bearing ring frame through a pillar, and the bearing ring frame is equipped with an incremental screening mechanism for grading and screening the alumina carrier according to different particle sizes and adjusting the screening range of the alumina carrier, and the vertical cross-section of the upper end of the sieve plate is conical. The present invention combines the inclined upper surface of the sieve plate with the inclined surface of the conical annular screen, and can use centrifugal force and gravity to make the alumina carrier particles automatically slide along the inclined surface to the periphery of the annular screen during the rotation of the sieve plate, thereby increasing the range of material spreading, and the conical inclined surface of the annular screen allows the material to be spontaneously distributed to the entire area of ​​the screen, avoiding concentrated accumulation in local areas.

Description

Technical Field

[0001] The invention relates to the technical field of alumina carrier processing, in particular to automatic screening equipment for preparing alumina carriers. Background Art

[0002] Alumina carrier refers to a carrier material with high surface area and pore structure based on alumina. It is widely used in catalysis, adsorption, separation and storage. The characteristics of alumina carrier include high temperature stability, chemical inertness, large specific surface area and good mechanical strength. It can be used as a catalyst carrier and plays an important role in catalytic reactions in many industrial processes such as petrochemicals and automobile exhaust purification. Alumina carrier provides support and dispersion for catalyst active substances in catalytic reactions, improving the activity, stability and durability of the catalyst. In the preparation process of alumina carrier, screening is an important step, which aims to separate materials according to the size of particles, remove unqualified particles, separate materials of different particle sizes, and ensure the particle size uniformity and quality of the final alumina carrier.

[0003] When grading and screening alumina carriers, they are often screened through a rotary screen. However, since alumina carriers are mostly irregular in shape and have poor fluidity, material accumulation is prone to occur at the bottom corners of existing rotary screens, resulting in incomplete screening. In addition, since the particles are concentrated in a local position of the screen, it is difficult for the material to fully contact the screen surface of different mesh sizes, resulting in large deviations in the screening results and uneven screening.

[0004] In addition, during the long screening process, the shape of the alumina carrier particles and the friction between the particles will make them easily embedded in the sieve holes and stuck, causing the screen to be blocked, reducing the effective sieve hole area of ​​the screen, and causing the material pass rate to decrease. Since the existing screening equipment cannot separate the particles that block the screen in time, as the number of blocked sieve holes increases, the permeability of the entire screen will drop significantly, resulting in a more time-consuming screening process and unsatisfactory results. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an automatic screening device for preparing alumina carriers, comprising a workbench, the upper end surface of the workbench is fixedly connected to a carrying ring frame through a pillar, the carrying ring frame is equipped with an incremental screening mechanism for grading and screening the alumina carriers according to different particle sizes and adjusting the screening range of the alumina carriers, the upper end surface of the workbench is provided with a driving part for driving the incremental screening mechanism to operate, and a self-cleaning mechanism for timely and automatically cleaning the alumina carriers stuck in the incremental screening mechanism is provided between the upper end of the workbench and the incremental screening mechanism, the incremental screening mechanism comprises a sieve plate rotatably connected to the carrying ring frame, a plurality of annular screens concentrically distributed from the inside to the outside and fixedly connected to the upper surface of the sieve plate, and an annular enclosure concentrically fixedly connected to the upper end surface of the sieve plate, the annular screens are all located on the inner side of the annular enclosure, the inner diameters of the annular screen and the annular enclosure gradually decrease from top to bottom, and the vertical cross-section of the upper end of the sieve plate is conical.

[0006] In one possible implementation, the driving part includes a shaft rod fixedly connected at the center of the lower end surface of the sieve plate, the lower end of the shaft rod is rotatably connected to the end surface of the workbench, the outside of the shaft rod is fixedly connected to a gear ring, a rectangular frame is provided on the outside of the gear ring, a rack meshing with the gear ring is fixedly connected to the rear cavity wall of the rectangular frame, an ear plate is fixedly connected to the upper end surface of the workbench, a sliding rod is slidably connected to the ear plate, the left end of the sliding rod is fixedly connected to the right end surface of the rectangular frame, and a reciprocating movement unit for driving the sliding rod to move back and forth laterally is provided on the workbench.

[0007] In one possible implementation, the reciprocating movement unit includes a driving motor fixedly connected to the end surface of the workbench through a fixing rod, a shift rod is fixedly connected to the output shaft of the driving motor, a connecting rod is hinged at one end of the shift rod away from the output shaft of the driving motor, and an end of the connecting rod away from the shift rod is hinged to the right end of the sliding rod.

[0008] In a possible implementation, an L-shaped frame is fixedly connected to the upper end surface of the workbench, an input pipe is embedded and fixedly connected to the transverse section of the L-shaped frame just above the sieve plate, and a plurality of branch pipes are connected to the lower end of the input pipe at equal intervals in the circumferential direction.

[0009] In a possible implementation, the self-cleaning mechanism includes two support plates symmetrically fixedly connected to the upper end surface of the workbench, telescopic columns are fixed on opposite sides of the two support plates, and a transverse strip is fixedly connected to the end of the telescopic column away from the support plate, and a rectangular frame movably mounted on the outside of the input pipe is fixedly connected between the two transverse strips, and a number of folding plates corresponding to the outer wall of the annular screen are fixedly connected to the lower end surfaces of the two transverse strips at equal distances, and a brush roller is rotatably connected to the lower part of the folding plate, and a linkage component is commonly arranged between the right transverse strip and the slide rod.

[0010] In one possible implementation, the linkage assembly includes a rectangular sliding frame fixedly connected to the lower end surface of the horizontal strip located on the right side, a vertical rod fixedly connected to the outer wall of the sliding rod, and a sliding block fixedly connected to the upper end of the vertical rod and slidably connected to the rectangular sliding frame, and the sliding block and the left and right inner walls of the rectangular sliding frame are fixedly connected to limit springs.

[0011] In a possible implementation, a plurality of bar groups are fixedly connected to the upper surface of the sieve plate at equal intervals along its circumference, and each bar group includes arc-shaped bars distributed along the radial direction of the sieve plate and corresponding one-to-one to the annular screen and the annular enclosure.

[0012] In one possible implementation, the sieve plate is provided with a control and discharge mechanism for discharging alumina carriers of different particle sizes after screening in sequence, the control and discharge mechanism includes two slot groups arranged along the circumference of the sieve plate, each slot group includes a plurality of through slots radially opened on the sieve plate, and the arc lengths of the plurality of through slots gradually increase from inside to outside, a cross plate frame is fixedly connected to the shaft rod, and push rods corresponding to the plurality of through slots are equidistantly slidably connected to the cross plate frame, a return spring is fixedly connected between the push rod and the lower end surface of the cross plate frame, an arc-shaped sealing plate slidably arranged in the through slot is fixedly connected to the upper end of the push rod, and a top-touching unit is provided between the shaft rod and the cross plate frame for cooperating with the push rod in sequence from outside to inside along the radial direction of the sieve plate to control the arc-shaped sealing plate to open in sequence from outside to inside.

[0013] In a possible implementation, the top contact unit includes two guide groove groups symmetrically opened on the lower end surface of the cross plate frame, a U-shaped frame slidably connected to the guide groove group, an inverted V-shaped plate fixedly connected to the bottom of the U-shaped frame cavity through a fixing column and cooperating with the top rod, a mounting groove opened on the shaft rod, an electric telescopic rod fixedly connected to the bottom of the mounting groove, and a pull rod hingedly connected between the upper end of the electric telescopic rod and the U-shaped frame.

[0014] In a possible implementation, a shield is fixedly connected to both left and right sides of the upper portion of the horizontal plate frame, the cross section of the shield is an inverted V structure, and a circular through hole is opened on the shield for the corresponding push rod to pass through.

[0015] It can be seen from the above technical scheme that the present invention has the following advantages: 1. The present invention combines the inclined upper surface of the sieve plate with the inclined surface of the conical annular screen. During the rotation of the sieve plate, centrifugal force and gravity can be used to make the alumina carrier particles automatically slide along the inclined surface to the periphery of the annular screen, thereby increasing the range of material spreading. The conical inclined surface of the annular screen allows the material to be spontaneously distributed over the entire area of ​​the screen, avoiding concentrated accumulation in local areas.

[0016] 2. The present invention uses the conical surface of the annular screen and the double inclined structure of the screen plate to keep the material in a continuous dynamic distribution state during reciprocating rotation, avoiding staying on the screen holes in a certain area for a long time. By continuous spreading and redistribution, it is difficult for particles to accumulate at the screen holes, reducing the possibility of clogging of the screen holes. At the same time, the material can fully contact the screen surfaces of different meshes, and particles of different particle sizes can pass through the corresponding screen holes smoothly, so that the classification is more accurate and the screening effect is more stable.

[0017] 3. The present invention interconnects the self-cleaning mechanism and the additional spreading screening mechanism, and timely removes particles stuck in the screen holes of the annular screen while screening the material, so that the screen holes of the annular screen remain unobstructed, ensuring that the particles pass through the annular screen smoothly, ensuring the normal permeability of the screen, avoiding a decrease in material passing rate due to blockage, and helping to reduce screening time.

[0018] 4. The present invention automatically discharges alumina carrier particles of different sizes in sequence through a control and discharge mechanism after screening is completed, avoiding the mixing of particles of different sizes caused by manual or inaccurate discharge, ensuring the purity of the classification after discharge, and realizing a seamless screening-discharging process, thereby improving the overall screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of the automatic screening equipment for preparing the alumina carrier provided by the present invention.

[0021] Figure 2 A schematic diagram from a bottom-up perspective of a partial structure of an automatic screening device for preparing an alumina carrier provided by the present invention.

[0022] Figure 3 The present invention provides Figure 2 Schematic diagram of the enlarged structure of part A in FIG.

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure from a front perspective of the spreading type sub-screening mechanism provided by the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the incremental screening mechanism provided by the present invention from a top view.

[0025] Figure 6 This is a partial cross-sectional schematic diagram of the control and exhaust mechanism provided by the present invention.

[0026] Figure 7 This is a schematic diagram of the structure of the control and discharge mechanism provided by the present invention from a bottom-up perspective.

[0027] The above drawings include the following reference numerals: 1. workbench; 2. bearing ring frame; 3. spreading sub-screening mechanism; 31. sieve plate; 32. annular screen; 33. annular enclosure; 4. driving part; 41. shaft; 42. gear ring; 43. rectangular frame; 44. rack; 45. slide bar; 46. reciprocating moving unit; 461. driving motor; 462. lever; 463. connecting rod; 5. self-cleaning mechanism; 51. support plate; 52. horizontal strip plate; 53. rectangular frame; 5 4. Folding plate; 55. Brush roller; 56. Linkage assembly; 561. Rectangular sliding frame; 562. Vertical rod; 563. Sliding block; 6. Input pipe; 7. Branch pipe; 8. Arc-shaped shift bar; 9. Control and discharge mechanism; 91. Through groove; 92. Horizontal plate frame; 93. Push rod; 94. Arc-shaped sealing plate; 95. Top contact unit; 951. Guide groove group; 952. U-shaped frame; 953. Inverted V-shaped plate; 954. Mounting groove; 955. Electric telescopic rod; 956. Pull rod; 10. Shield. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0029] See also Figure 1 , an automatic screening device for preparing alumina carriers, comprising a workbench 1, the upper end surface of the workbench 1 is fixedly connected to a supporting ring frame 2 through a pillar, the supporting ring frame 2 is installed with an incremental screening mechanism 3 for grading and screening alumina carriers according to different particle sizes while increasing the screening range of the alumina carriers to speed up the screening speed, the upper end surface of the workbench 1 is provided with a driving part 4 for driving the incremental screening mechanism 3 to operate, a self-cleaning mechanism 5 for timely and automatically cleaning the alumina carriers stuck in the incremental screening mechanism 3 is provided between the upper end of the workbench 1 and the incremental screening mechanism 3, the incremental screening mechanism 3 comprises a sieve plate 31 rotatably connected to the supporting ring frame 2, the upper end surface of the workbench 1 is fixedly connected to an L-shaped frame, the transverse section of the L-shaped frame and located directly above the sieve plate 31 is embedded and fixedly connected with an input pipe 6, and the lower end of the input pipe 6 is connected with a plurality of branch pipes 7 equidistantly in the circumferential direction.

[0030] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The incremental screening mechanism 3 also includes a plurality of annular screens 32 which are concentrically distributed from the inside to the outside and fixedly connected to the upper surface of the sieve plate 31, and an annular enclosure 33 which is concentrically fixedly connected to the upper end surface of the sieve plate 31. The annular screens 32 are all located on the inner side of the annular enclosure 33. The apertures of the annular screens 32 distributed from the inside to the outside gradually decrease. The inner diameters of the annular screens 32 and the annular enclosures 33 gradually decrease from top to bottom. The vertical cross-section of the upper end of the sieve plate 31 is conical. A plurality of bar groups are fixedly connected to the upper surface of the sieve plate 31 at equal intervals along its circumference. Each bar group includes arc-shaped bars 8 which are distributed radially along the sieve plate 31 and correspond one-to-one to the annular screens 32 and the annular enclosures 33.

[0031] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The driving part 4 includes a shaft rod 41 fixedly connected to the center of the lower end surface of the sieve plate 31, the lower end of the shaft rod 41 is rotatably connected to the upper end surface of the workbench 1, a gear ring 42 is fixedly connected to the outside of the shaft rod 41, a rectangular frame 43 is arranged on the outer side of the gear ring 42, a rack 44 meshing with the gear ring 42 is fixedly connected to the rear cavity wall of the rectangular frame 43, an ear plate is fixedly connected to the upper end surface of the workbench 1, a slide rod 45 is slidably connected to the ear plate, the left end of the slide rod 45 is fixedly connected to the right end surface of the rectangular frame 43, a reciprocating unit 46 for driving the slide rod 45 to reciprocate laterally is arranged on the workbench 1, the reciprocating unit 46 includes a driving motor 461 fixedly connected to the upper end surface of the workbench 1 through a fixed rod, a shifting rod 462 is fixedly connected to the output shaft of the driving motor 461, a connecting rod 463 is hinged at one end of the shifting rod 462 away from the output shaft of the driving motor 461, and an end of the connecting rod 463 away from the shifting rod 462 is hinged to the right end of the slide rod 45.

[0032] The alumina carrier particles are transported to the input pipe 6, and the alumina carrier particles flow downward and enter the circumferentially distributed branch pipes 7 in turn, and then enter the middle position of the sieve plate 31 from multiple directions. At the same time, the drive motor 461 is controlled to drive the lever 462 to rotate reciprocatingly. During the rotation of the lever 462, the slide bar 45 is driven to move reciprocatingly horizontally through the connecting rod 463. The slide bar 45 then drives the rack 44 to move reciprocatingly horizontally through the rectangular frame 43, and the rack 44 then drives the gear ring 42 to rotate reciprocatingly. The gear ring 42 then drives the sieve plate 31 to rotate reciprocatingly through the shaft 41, and the sieve plate 31 then drives the annular screen 32 to rotate reciprocatingly.

[0033] During the reciprocating rotation of the sieve plate 31 and the annular screen 32, the inclined surfaces of the two and the centrifugal force during rotation are utilized to make the alumina carrier particles first move from the inside to the outside along the upper surface of the sieve plate 31. When the particles move and contact the annular screen 32, the alumina carrier particles will move up along the inclined surface of the annular screen 32 under the centrifugal force. When the sieve plate 31 switches direction, the alumina carrier particles on the annular screen 32 will roll down under gravity, making the alumina carrier particles move dynamically on the annular screen 32, thus avoiding the accumulation of alumina carrier particles on the annular screen 32. At the same time, the alumina carrier particles can be evenly spread on the annular screen 32, making the alumina carrier particles fully contact with the surface of the annular screen 32, thereby ensuring a more uniform screening process and improving screening accuracy.

[0034] While the sieve plate 31 is rotating, the alumina carrier particles are moved by the arc-shaped bar 8, and the arc-shaped bar 8 moves the alumina carrier particles away from the center of the sieve plate 31. When the sieve plate 31 switches direction, the arc-shaped bar 8 will move the alumina carrier particles toward the center of the sieve plate 31, so that the alumina carrier particles roll back and forth on the surface of the sieve plate 31. The alumina carrier particles are first screened by the innermost annular screen 32, and the alumina carrier particles with a particle size larger than the aperture of the innermost annular screen 32 will be intercepted, while the alumina carrier particles with a particle size smaller than the aperture of the innermost annular screen 32 will enter the area between the first and second annular screens 32 arranged from the inside to the outside.

[0035] The alumina carrier particles are then screened through a second annular screen 32 arranged from the inside to the outside to intercept the alumina carrier particles of the next size, and the alumina carrier particles that are not intercepted are screened by the next annular screen 32. A plurality of annular screens 32 distributed from the inside to the outside with gradually decreasing sieve apertures are combined to screen the alumina carrier particles in order from large to small particle sizes, thereby ensuring the consistency of the particle size after screening.

[0036] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The self-cleaning mechanism 5 includes two support plates 51 symmetrically fixedly connected to the upper end surface of the workbench 1, and telescopic columns are fixed on the opposite sides of the two support plates 51. A transverse strip 52 is fixedly connected to one end of the telescopic column away from the support plate 51, and a rectangular frame 53 movably sleeved on the outside of the input pipe 6 is fixedly connected between the two transverse strips 52. A plurality of folding plates 54 corresponding to the outer wall of the annular screen 32 are fixedly connected to the lower end surfaces of the two transverse strips 52 at equal distances, and a brush roller 55 is rotatably connected to the lower part of the folding plate 54. A linkage component 56 is commonly arranged between the right transverse strip 52 and the slide rod 45. The linkage component 56 includes a rectangular slide frame 561 fixedly connected to the lower end surface of the transverse strip 52 located on the right side, a vertical rod 562 fixedly connected to the outer wall of the slide rod 45, and a slider 563 fixedly connected to the upper end of the vertical rod 562 and slidably connected to the rectangular slide frame 561. The slider 563 and the left and right inner walls of the rectangular slide frame 561 are fixedly connected to limit springs.

[0037] When the slide bar 45 reciprocates horizontally to the left and right, it will also drive the vertical rod 562 to move synchronously. The vertical rod 562 then drives the slider 563 to move horizontally back and forth. The slider 563 then compresses the limit spring on one side of its moving direction and drives the rectangular slide frame 561 to move synchronously. The rectangular slide frame 561 then drives the right side transverse slat 52 to move horizontally back and forth. The right side transverse slat 52 then drives the left side transverse slat 52 to move synchronously through the rectangular frame 53. When the transverse slat 52 moves, it drives the brush roller 55 to move horizontally back and forth through the folding plate 54. During the movement of the transverse slat 52 to the right, when the brush roller 55 corresponding to the left side transverse slat 52 contacts the outer wall of the annular sieve plate 31, the brush roller 55 corresponding to the right side transverse slat 52 is in a separated state from the outer wall of the annular sieve plate 31, the transverse slat 52 stops moving right, and the vertical rod 562 continues to move, which will drive the slider 563 to slide in the rectangular slide frame 561, and the limit spring is deformed.

[0038] When the horizontal slat 52 moves to the left, when the brush roller 55 corresponding to the left horizontal slat 52 separates from the outer wall of the annular sieve plate 31 and the brush roller 55 corresponding to the right horizontal slat 52 contacts the outer wall of the annular sieve plate 31, the horizontal slat 52 stops moving and the vertical rod 562 continues to move, which will drive the slider 563 to slide in the rectangular slide frame 561 and during this period of time, the brush roller 55 will continue to contact the annular screen 32, and the alumina carrier particles stuck in the sieve holes of the annular screen 32 will be removed in time by using the brush roller 55, so that the sieve holes of the screen remain unobstructed, ensuring that the particles pass through the screen smoothly, avoiding a decrease in material pass rate due to blockage, which is beneficial to greatly improve the screening efficiency and reduce the screening time.

[0039] See also Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7A control and discharge mechanism 9 is provided on the sieve plate 31 for discharging alumina carriers of different particle sizes after screening in sequence, and the control and discharge mechanism 9 includes two slot groups arranged circumferentially along the sieve plate 31, and each slot group includes a plurality of through slots 91 radially opened on the sieve plate 31, and the arc lengths of the plurality of through slots 91 gradually increase from inside to outside, and a cross plate frame 92 is fixedly connected to the shaft rod 41, and a top rod 93 corresponding to the plurality of through slots 91 is equidistantly slidably connected to the cross plate frame 92, and a return spring is fixedly connected between the top rod 93 and the lower end surface of the cross plate frame 92, and an arc-shaped sealing plate 94 slidably arranged in the through slot 91 is fixedly connected to the upper end of the top rod 93, and a top-touching unit 95 is commonly provided between the shaft rod 41 and the cross plate frame 92 for cooperating with the top rod 93 in sequence from outside to inside along the radial direction of the sieve plate 31 to control the arc-shaped sealing plate 94 to open in sequence from outside to inside.

[0040] See also Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7 The top contact unit 95 includes two guide groove groups 951 symmetrically opened on the lower end surface of the horizontal plate frame 92, a U-shaped frame 952 slidably connected to the guide groove group 951, an inverted V-shaped plate 953 fixedly connected to the bottom of the U-shaped frame 952 through a fixing column and cooperating with the top rod 93, a mounting groove 954 opened on the shaft rod 41, an electric telescopic rod 955 fixedly connected to the bottom of the mounting groove 954, and a pull rod 956 hinged between the upper end of the electric telescopic rod 955 and the U-shaped frame 952. The left and right sides of the upper part of the horizontal plate frame 92 are fixedly connected with a mask 10. The cross-section of the mask 10 is an inverted V structure. A circular through hole is opened on the mask 10 for the corresponding top rod 93 to pass through.

[0041] The electric telescopic rod 955 is at its longest length in the initial state, so the U-shaped frame 952 is at the farthest initial position from the shaft rod 41. After the screening of the alumina carrier particles is completed, the electric telescopic rod 955 is controlled to retract intermittently in sequence. When the electric telescopic rod 955 retracts for the first time, it will pull the pull rod 956 to move, and the pull rod 956 will then pull the U-shaped frame 952 toward the shaft rod 41 for a distance. The U-shaped frame 952 then drives the inverted V-shaped plate 953 to move. When the inverted V-shaped plate 953 moves until it touches the lower end of the top rod 93 The inclined surface of the inverted V-shaped plate 953 will push the push rod 93 upward, and the push rod 93 will then push the arc-shaped sealing plate 94 upward, so that the arc-shaped sealing plate 94 is removed from the upper part of the through groove 91, and then during the reciprocating rotation of the screen, the alumina carrier particles screened out from the outermost circle are shaken into the through groove 91 and then discharged. When the alumina carrier particles fall onto the mask 10 during the discharge process from the through groove 91, the inclined surface of the mask 10 is used to make the fallen alumina carrier particles roll to both sides, thereby preventing the alumina carrier particles from falling directly onto the horizontal plate frame 92.

[0042] After the alumina carrier particles located in the outermost circle are completely discharged, the electric telescopic rod 955 is controlled to retract a distance again. The electric telescopic rod 955 retracts and pulls the U-shaped frame 952 along the guide groove group 951 through the pull rod 956. The U-shaped frame 952 drives the inverted V-shaped plate 953 to separate from the first push rod 93 arranged from the outside to the inside. During this process, the first push rod 93 first rises to push the arc sealing plate 94 and compresses the reset spring, and then moves downward under the action of the rebound force of the reset spring and drives the arc sealing plate 94 to move down to the initial position. The U-shaped frame 952 that continues to move then drives the inverted V-shaped plate 953 to continue to move toward the shaft rod 41. Similar to the above process, the remaining push rods 93 are pushed up in turn, and then the through grooves 91 arranged from the outside to the inside are controlled to open in turn to discharge the alumina carrier particles, so that the alumina carrier particles of different particle sizes after screening can be quickly discharged in turn.

[0043] See also Figure 1-Figure 7 When working, the alumina carrier particles are first introduced into the input pipe 6, and then into multiple branch pipes 7, and then enter the incremental screening mechanism 3 from multiple different directions. At the same time, the driving part 4 is controlled to operate to drive the incremental screening mechanism 3 to start. The incremental screening mechanism 3 starts to screen the alumina carrier particles, and the alumina carrier particles are graded according to different particle sizes. At the same time, the driving part 4 will also drive the self-cleaning mechanism 5 to operate, and then the self-cleaning mechanism 5 will promptly remove the alumina carrier particles blocked on the annular screen 32 in the incremental screening mechanism 3 in operation, so as to ensure the normal screening speed of the incremental screening mechanism 3. After the screening of the alumina carrier particles is completed, the control and discharge mechanism 9 is controlled to operate, and the control and discharge mechanism 9 discharges the alumina carrier particles screened according to different particle sizes in sequence from the outside to the inside in the radial direction.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first", "second", "number one", "number two" 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", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic screening device for preparing an alumina carrier, comprising a workbench (1), characterized in that: The upper end surface of the workbench (1) is fixedly connected to a bearing ring frame (2) via a support, and an amplification type screening mechanism (3) is installed on the bearing ring frame (2) for grading and screening the alumina carrier according to different particle sizes and adjusting the screening range of the alumina carrier. The upper end surface of the workbench (1) is provided with a driving part (4) for driving the amplification type screening mechanism (3) to operate, and a self-cleaning mechanism (5) is provided between the upper end of the workbench (1) and the amplification type screening mechanism (3) for timely and automatically cleaning the alumina carrier stuck in the amplification type screening mechanism (3); The incremental sub-screening mechanism (3) comprises a sieve plate (31) rotatably connected to the bearing ring frame (2), a plurality of annular screens (32) concentrically distributed from the inside to the outside and fixedly connected to the upper surface of the sieve plate (31), and an annular enclosure (33) concentrically fixedly connected to the upper end surface of the sieve plate (31), wherein the annular screens (32) are all located on the inner side of the annular enclosure (33); The inner diameters of the annular screen (32) and the annular enclosure (33) gradually decrease from top to bottom, and the vertical cross section of the upper end of the sieve plate (31) is conical; The driving part (4) comprises a shaft rod (41) fixedly connected to the center of the lower end surface of the sieve plate (31); the lower end of the shaft rod (41) is rotatably connected to the upper end surface of the workbench (1); the shaft rod (41) is fixedly connected to a gear ring (42) on the outside; a rectangular frame (43) is arranged on the outside of the gear ring (42); a rack (44) meshing with the gear ring (42) is fixedly connected to the rear cavity wall of the rectangular frame (43); an ear plate is fixedly connected to the upper end surface of the workbench (1); a sliding rod (45) is slidably connected to the ear plate; the left end of the sliding rod (45) is fixedly connected to the right end surface of the rectangular frame (43); and a reciprocating moving unit (46) for driving the sliding rod (45) to move back and forth laterally is arranged on the workbench (1); The upper end surface of the workbench (1) is fixedly connected to an L-shaped frame, and the transverse section of the L-shaped frame is located just above the sieve plate (31) and is fixedly connected to an input pipe (6), and the lower end of the input pipe (6) is connected to a plurality of branch pipes (7) at equal intervals in the circumferential direction; The self-cleaning mechanism (5) comprises two support plates (51) symmetrically fixedly connected to the upper end surface of the workbench (1), telescopic columns are fixedly connected to the opposite sides of the two support plates (51), and the end of the telescopic column away from the support plate (51) is fixedly connected to a transverse strip plate (52), and a rectangular frame (53) movably sleeved on the outside of the input pipe (6) is fixedly connected between the two transverse strip plates (52), and a plurality of folding plates (54) corresponding to the outer wall of the annular screen (32) are fixedly connected to the lower end surfaces of the two transverse strip plates (52) at equal distances, and a brush roller (55) is rotatably connected to the lower part of the folding plate (54), and a linkage component (56) is commonly provided between the right transverse strip plate (52) and the slide rod (45); The linkage assembly (56) comprises a rectangular sliding frame (561) fixedly connected to the lower end surface of the horizontal strip (52) located on the right side, a vertical rod (562) fixedly connected to the outer wall of the sliding rod (45), and a sliding block (563) fixedly connected to the upper end of the vertical rod (562) and slidably connected in the rectangular sliding frame (561), and the sliding block (563) and the left and right inner walls of the rectangular sliding frame (561) are both fixedly connected to limit springs.

2. The automatic screening device for preparing an alumina carrier according to claim 1, characterized in that: The reciprocating moving unit (46) comprises a driving motor (461) fixedly connected to the upper end surface of the workbench (1) via a fixing rod, a shifting rod (462) fixedly connected to the output shaft of the driving motor (461), an end of the shifting rod (462) away from the output shaft of the driving motor (461) is hingedly connected to a connecting rod (463), and an end of the connecting rod (463) away from the shifting rod (462) is hingedly connected to the right end of the sliding rod (45).

3. The automatic screening device for preparing an alumina carrier according to claim 1, characterized in that: The upper surface of the sieve plate (31) is fixedly connected with a plurality of bar groups at equal intervals along its circumference, and each bar group comprises arc-shaped bars (8) distributed radially along the sieve plate (31) and corresponding one-to-one with the annular screen (32) and the annular enclosure (33).

4. The automatic screening device for preparing an alumina carrier according to claim 1, characterized in that: The sieve plate (31) is provided with a control and discharge mechanism (9) for sequentially discharging alumina carriers of different particle sizes after sieving. The control and discharge mechanism (9) comprises two slot groups arranged along the circumference of the sieve plate (31). Each slot group comprises a plurality of through slots (91) radially arranged on the sieve plate (31). The arc lengths of the plurality of through slots (91) gradually increase from the inside to the outside. The shaft rod (41) is fixedly connected to a transverse plate frame (92). The transverse plate frame (92) is equidistantly slidably connected to the shaft rod (41). There are push rods (93) corresponding to the plurality of through slots (91) one by one, a return spring is fixedly connected between the push rods (93) and the lower end surface of the cross plate frame (92), an arc-shaped sealing plate (94) slidably arranged in the through slot (91) is fixedly connected to the upper end of the push rod (93), and a top contact unit (95) is commonly arranged between the shaft rod (41) and the cross plate frame (92) for cooperating with the push rods (93) in sequence from the outside to the inside along the radial direction of the sieve plate (31) to control the arc-shaped sealing plate (94) to open in sequence from the outside to the inside.

5. The automatic screening device for preparing an alumina carrier according to claim 4, characterized in that: The top contact unit (95) comprises two guide groove groups (951) symmetrically arranged on the lower end surface of the horizontal plate frame (92), a U-shaped frame (952) slidably connected to the guide groove group (951), an inverted V-shaped plate (953) fixedly connected to the bottom of the U-shaped frame (952) through a fixing column and cooperating with the top rod (93), a mounting groove (954) arranged on the shaft rod (41), an electric telescopic rod (955) fixedly connected to the bottom of the mounting groove (954), and a pull rod (956) hingedly connected between the upper end of the electric telescopic rod (955) and the U-shaped frame (952).

6. The automatic screening device for preparing an alumina carrier according to claim 4, characterized in that: The left and right sides of the upper part of the horizontal plate frame (92) are fixedly connected with a shield (10), the cross section of the shield (10) is an inverted V structure, and the shield (10) is provided with a circular through hole for a corresponding push rod (93) to pass through.

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