Granular asphalt screening equipment and screening method for petroleum asphalt production

Abstract

The invention belongs to the technical field of asphalt production, and discloses granular asphalt screening equipment for petroleum asphalt production and a screening method.The equipment comprises a mounting cylinder, a screening cylinder, a supporting rod, a fixing ring, a scraper and a material guiding ring arranged in the mounting cylinder in a sleeved mode, and the screening cylinder is rotationally connected to the two ends of the material guiding ring; a plurality of annular grooves are formed in the inner wall of the screening cylinder, a plurality of screening holes used for screening granular asphalt are formed in the inner walls of the annular grooves, the supporting rod is arranged in the material guiding ring and the screening cylinder in a sleeved mode, and the fixing ring is arranged on the supporting rod in a sleeved mode and fixedly connected with the supporting rod. When the screening cylinder rotates, the scraper slides along the inner wall of the annular groove in the screening cylinder, and when sliding, the scraper can extrude asphalt particles blocked in the screening holes through the multiple screening holes, so that the asphalt particles are extruded out along the inclined plane on the scraper, and due to the design, the blocked asphalt particles can be quickly cleaned out; the deeper and deeper asphalt is avoided, and the cleaning efficiency and the cleaning effect are improved.

Description

Technical Field

[0001] The present invention relates to the field of asphalt production, and more specifically, to a granular asphalt screening device and a screening method for petroleum asphalt production. Background Art

[0002] As a byproduct of crude oil distillation and refining, petroleum asphalt is widely used in many industrial fields such as coatings, plastics, rubber, etc., and plays a pivotal role in road construction. Asphalt in particle form needs to be screened by a screening device before use to ensure that only particles that meet strict standards, especially those with uniform particle sizes, can be adopted and put into practical application.

[0003] In the existing technology, when screening asphalt particles, some asphalt particles with a size similar to the size of the screening holes will be stuck in the screening holes under the action of pressure, making the asphalt particles difficult to clean. The commonly used cleaning method is to clean by vibrating the screening cylinder. However, the blocked asphalt particles during vibration cleaning can only move slowly outward along the screening holes, and since the inner walls of the screening holes are of uniform size, some asphalt particles will get stuck deeper and deeper, resulting in low cleaning efficiency and poor cleaning effect. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a granular asphalt screening device and screening method for petroleum asphalt production, which can quickly clean out the blocked asphalt particles, prevent the asphalt from getting stuck deeper, and improve the cleaning efficiency and cleaning effect.

[0005] In order to solve the above technical problems, the present invention proposes a granular asphalt screening device for petroleum asphalt production, comprising a mounting cylinder, a screening cylinder, a support rod, a fixing ring, a rotating arm, a scraper and a driving assembly, wherein a guide ring is sleeved in the mounting cylinder; the screening cylinder is rotatably connected to both ends of the guide ring, a plurality of annular grooves are formed on the inner wall of the screening cylinder, and a plurality of screening holes for screening granular asphalt are formed on the inner wall of the annular groove; The support rod is sleeved in the material guide ring and the screening cylinder, the fixed ring is sleeved on the support rod and fixedly connected thereto, and the rotating arm is fixedly connected to the fixed ring; The scraper is fixedly connected to the end of the rotating arm, the scraper is slidably connected to the inner wall of the annular groove, and the outer wall of the scraper is provided with an inclined surface; The driving assembly is used for driving the screening drum to rotate.

[0006] Preferably, the inner wall diameter of the guide ring gradually increases from the middle to both ends thereof, and the inner wall diameter of the screening cylinder gradually increases from one end close to the guide ring to the other end thereof.

[0007] Preferably, a feed hole is opened on the outer wall of the guide ring, a feed hopper is fixedly connected to the inner wall of the mounting cylinder, and the inner end of the feed hopper is fixedly connected to the feed hole.

[0008] Preferably, the inner walls at both ends of the installation cylinder are fixedly connected with guide pipes, the ends of the guide pipes are rotatably connected to the screening cylinders respectively, and the inner wall diameter of the guide pipe increases gradually from one end close to the screening cylinder to the other end.

[0009] Preferably, the outer walls of the material guide tubes are fixedly connected to material storage barrels, and the inner walls of one of the material storage barrels are fixedly connected to an air intake net, and the air intake net is fixedly connected to the support rod.

[0010] Preferably, the outer wall of the mounting barrel is fixedly connected to a first bracket, the inner wall of the first bracket is installed with a first conveyor, the outer wall of the storage barrel is fixedly connected to a second bracket, and the inner wall of the second bracket is installed with a second conveyor.

[0011] Preferably, another inner wall of the storage barrel is fixedly connected with a connecting pipe, one side of the outer port of the connecting pipe is provided with an external connecting pipe, the outer wall of the external connecting pipe is fixedly connected with a plurality of supporting arms, the ends of the supporting arms are respectively fixedly connected to the storage barrel, and the inner wall of the external connecting pipe is fixedly connected with an exhaust net.

[0012] Preferably, the driving assembly comprises a driving shaft and a frame, both ends of the driving shaft respectively penetrate through the mounting cylinder and are rotatably connected thereto, a first gear is fixedly connected to the outer wall of the driving shaft, a first gear ring is fixedly connected to the outer wall of the screening cylinder, and the first gear meshes with the first gear ring; The outer wall of the frame is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a driving shaft, the frame is fixedly connected with an exhaust net, the outer wall of the mounting cylinder is provided with a mounting hole, and the first gear is located in the mounting hole.

[0013] Preferably, a second motor is fixedly connected to the inner wall of the frame, an output shaft is fixedly connected to the output end of the second motor, the end of the output shaft passes through the exhaust net and extends into the external pipe, the end of the output shaft is fixedly connected to a connecting shaft, and the connecting shaft is rotatably connected to the support rod; A filter screen is rotatably connected between the connecting pipe and the external pipe, a second gear ring is fixedly connected to the outer wall of the filter screen, a second gear is fixedly connected to the outer wall of the driving shaft, and the second gear is meshed with the second gear ring; The inner wall of the filter is fixedly connected to a first bearing, the inner ring wall of the first bearing is fixedly connected to the output shaft, the outer wall of the output shaft is fixedly connected to a fan blade, the outer wall of the output shaft is fixedly connected to a second bearing, the outer ring wall of the second bearing is fixedly connected to two sealing boxes, the end of the sealing box is fixedly connected to the inner wall of the connecting pipe, the inner wall of the sealing box is fixedly connected to a cleaning brush, and the cleaning brush is in frictional contact with the filter; An annular tube is fixedly connected to the outer wall of the second bearing, and two suction pipes are fixedly connected to the outer wall of the annular tube. The suction pipe located above passes through the connecting pipe and extends to the outside thereof, and the end of the connecting pipe is fixedly connected to the suction end of an external vacuum cleaner.

[0014] A method for screening granular asphalt for petroleum asphalt production comprises the following steps: S1. The granular asphalt is fed into the guide ring through the feed hopper. The granular asphalt rolls along the inner wall of the guide ring into the screening cylinders on both sides. The first motor drives the drive shaft to rotate. The drive shaft drives the first gear ring to rotate through the first gear. The first gear ring drives the screening cylinder to rotate, so that the granular asphalt is fully in contact with the inner wall of the screening cylinder. The granular asphalt is screened through the screening holes on the screening cylinder. The qualified granular asphalt falls through the screening holes onto the first conveyor and is transported by the first conveyor. S2. When the screening drum rotates, the scraper slides along the inner wall of the annular groove in the screening drum. When the scraper slides, it passes through multiple screening holes and can squeeze the asphalt particles blocked in the screening holes, so that the asphalt particles are squeezed out along the inclined surface of the scraper; S3, unqualified asphalt particles roll along the screening cylinder into the guide pipe, and roll along the guide pipe into the inside of the storage cylinder, and the unqualified asphalt particles can be transported by the second conveyor; S4, during the screening process, the second motor drives the output shaft to rotate, and the output shaft drives the fan blades to rotate. When the fan blades rotate, suction is generated, so that the external air enters the screening cylinder through the feed hopper, the air intake net, the installation cylinder and the storage cylinder, and is discharged through the exhaust net; S5. The asphalt dust in the air is filtered through the filter. When the driving shaft rotates, the second gear is driven to rotate, and the second gear ring is driven to rotate, and the filter is driven to rotate through the second gear ring. When the filter rotates, it rubs against the cleaning brush in the sealing box, and the dust blocked on the filter is cleaned by the cleaning brush. S6. The external vacuum cleaner absorbs the loose dust attached to the filter through the suction pipe. The sealed box can prevent the dust from spreading during the cleaning process. At the same time, the suction force of the suction pipe is controlled within the sealed box, making the suction force more concentrated.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the first motor drives the driving shaft to rotate, the driving shaft drives the first gear ring to rotate through the first gear, and the first gear ring drives the screening drum to rotate, so that the granular asphalt is fully in contact with the inner wall of the screening drum, and the granular asphalt is screened through the screening holes on the screening drum. When the screening drum rotates, the scraper slides along the inner wall of the annular groove in the screening drum. When the scraper slides, it passes through multiple screening holes and can squeeze the asphalt particles blocked in the screening holes, so that the asphalt particles are squeezed out along the inclined surface of the scraper. This design can quickly clean out the blocked asphalt particles, avoid the asphalt from getting stuck deeper, and improve the cleaning efficiency and cleaning effect.

[0016] 2. In the present invention, the second motor drives the output shaft to rotate, and the output shaft drives the fan blades to rotate. When the fan blades rotate, suction is generated, so that external air enters the screening cylinder through the feed hopper, the air intake net, the installation cylinder and the storage cylinder respectively, and is discharged through the exhaust net, which can prevent dust from spreading to the outside of the device during feeding and discharging, affecting the processing environment, and at the same time reducing the increase in the internal temperature of the device caused by friction during the asphalt particle screening process; the asphalt dust in the air is filtered through the filter, and when the drive shaft rotates, it drives the second gear to rotate, and the second gear drives the second gear ring to rotate, and the second gear ring drives the filter to rotate. When the filter rotates, it generates friction with the cleaning brush in the sealing box, and the dust blocked on the filter is cleaned by the cleaning brush. The external vacuum cleaner absorbs the loose dust attached to the filter through the suction pipe. The sealing box can prevent the diffusion of dust during the cleaning process, and at the same time control the suction force of the suction pipe within the sealing box, so that the suction force is more concentrated, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the installation structure of the material storage barrel of the present invention; Figure 3 This is a schematic diagram of the installation structure of the screening cylinder of the present invention; Figure 4 This is a schematic diagram of the installation structure of the guide ring of the present invention; Figure 5 It is a schematic diagram of the installation structure of the scraper of the present invention; Figure 6 It is a schematic diagram of the installation structure of the filter screen of the present invention; Figure 7 is a schematic diagram of the installation structure of the second gear ring of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.

[0019] Explanation of the reference numerals in the figure: 1, mounting cylinder; 2, guide ring; 3, screening cylinder; 4, annular groove; 5, screening hole; 6, support rod; 7, fixing ring; 8, rotating arm; 9, scraper; 10, inclined plane; 11, driving shaft; 12, first gear; 13, first gear ring; 14, guide pipe; 15, first bracket; 16, first conveyor; 17, feed hopper; 18, feed hole; 19, storage cylinder; 20, second bracket; 21, second conveyor; 22. Connecting shaft; 23. Air inlet net; 24. Mounting hole; 25. Connecting pipe; 26. External pipe; 27. Support arm; 28. Exhaust net; 29. ​​Frame; 30. First motor; 31. Second motor; 32. Fan blade; 33. Second gear; 34. First bearing; 35. Filter net; 36. Second gear ring; 37. Second bearing; 38. Sealing box; 39. Cleaning brush; 40. Annular pipe; 41. Intake pipe; 42. Output shaft. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the implementation mode of the present application clearer, the technical solution in the implementation mode of the present application will be clearly and completely described in combination with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application. The specific implementation modes of the present invention are described in detail in combination with the drawings in the specification.

[0021] like Figure 1-Figure 8 As shown, a granular asphalt screening device for petroleum asphalt production includes a mounting cylinder 1, a screening cylinder 3, a support rod 6, a fixing ring 7, a rotating arm 8, a scraper 9 and a driving assembly. A guide ring 2 is sleeved in the mounting cylinder 1, and the inner wall diameter of the guide ring 2 gradually increases from the middle to both ends thereof; the guide ring 2 can guide the input asphalt particles to the screening cylinders 3 on both sides to achieve diversion, facilitate the dispersed screening of the asphalt particles, improve the screening efficiency, and at the same time avoid that there are too many asphalt particles in the screening cylinder 3 on one side, resulting in uneven force at both ends of the device, affecting the overall stability.

[0022] The screening cylinder 3 is rotatably connected to both ends of the guide ring 2. The inner wall diameter of the screening cylinder 3 gradually increases from one end close to the guide ring 2 to the other end. The asphalt particles in the screening cylinder 3 can roll in the guide pipe 14, which is convenient for discharging unqualified asphalt particles and realizing continuous screening. The inner wall of the screening cylinder 3 is provided with a plurality of annular grooves 4, and the inner wall of the annular groove 4 is provided with a plurality of screening holes 5 for screening granular asphalt. The support rod 6 is sleeved in the guide ring 2 and the screening cylinder 3, the fixed ring 7 is sleeved on the support rod 6 and fixedly connected thereto, the rotating arm 8 is fixedly connected to the fixed ring 7, the scraper 9 is fixedly connected to the end of the rotating arm 8, the scraper 9 is slidably connected to the inner wall of the annular groove 4, and the outer wall of the scraper 9 is provided with an inclined surface 10; The annular groove 4 is connected to the screening hole 5. When the scraper 9 slides on the inner wall of the annular groove 4, it can push out the asphalt particles stuck on the inner wall of the screening hole 5, thereby achieving continuous cleaning and avoiding asphalt particles clogging the screening hole 5 and affecting the screening efficiency.

[0023] A feed hole 18 is formed on the outer wall of the guide ring 2 , a feed hopper 17 is fixedly connected to the inner wall of the mounting tube 1 , and the inner end of the feed hopper 17 is fixedly connected to the feed hole 18 , so that asphalt particles can be fed into the guide ring 2 through the feed hopper 17 and the feed hole 18 .

[0024] The inner walls of both ends of the mounting cylinder 1 are fixedly connected with guide pipes 14, and the ends of the guide pipes 14 are rotatably connected to the screening cylinder 3 respectively. The inner wall diameter of the guide pipe 14 gradually increases from one end close to the screening cylinder 3 to the other end. The asphalt particles entering the guide pipe 14 can be discharged into the storage cylinder 19.

[0025] The outer walls of the material guide tubes 14 are fixedly connected to the material storage barrels 19 , and the inner wall of one of the material storage barrels 19 is fixedly connected to the air intake net 23 , which is fixedly connected to the support rod 6 .

[0026] The outer wall of the mounting cylinder 1 is fixedly connected with a first bracket 15, the inner wall of the first bracket 15 is installed with a first conveyor 16, the outer wall of the storage cylinder 19 is fixedly connected with a second bracket 20, the inner wall of the second bracket 20 is installed with a second conveyor 21, and the first conveyor 16 and the second conveyor 21 can transport the screened asphalt particles.

[0027] A connecting pipe 25 is fixedly connected to the inner wall of another storage barrel 19, an external pipe 26 is provided on one side of the outer port of the connecting pipe 25, a plurality of support arms 27 are fixedly connected to the outer wall of the external pipe 26, the ends of the support arms 27 are respectively fixedly connected to the storage barrel 19, and an exhaust net 28 is fixedly connected to the inner wall of the external pipe 26.

[0028] The driving assembly is used to drive the screening drum 3 to rotate. The driving assembly includes a driving shaft 11 and a frame 29. Both ends of the driving shaft 11 respectively penetrate the mounting drum 1 and are rotatably connected thereto. A first gear 12 is fixedly connected to the outer wall of the driving shaft 11. A first gear ring 13 is fixedly connected to the outer wall of the screening drum 3. The first gear 12 meshes with the first gear ring 13. A first motor 30 is fixedly connected to the outer wall of the frame 29. An output end of the first motor 30 is fixedly connected to the driving shaft 11. The frame 29 is fixedly connected to the exhaust net 28. A mounting hole 24 is opened on the outer wall of the mounting drum 1, and the first gear 12 is located in the mounting hole 24.

[0029] A second motor 31 is fixedly connected to the inner wall of the frame 29, and an output shaft 42 is fixedly connected to the output end of the second motor 31. The end of the output shaft 42 passes through the exhaust net 28 and extends into the external pipe 26. The end of the output shaft 42 is fixedly connected to the connecting shaft 22, and the connecting shaft 22 is rotatably connected to the support rod 6. A filter screen 35 is rotatably connected between the connecting pipe 25 and the external pipe 26. A second gear ring 36 is fixedly connected to the outer wall of the filter screen 35. A second gear 33 is fixedly connected to the outer wall of the drive shaft 11. The second gear 33 meshes with the second gear ring 36. A first bearing 34 is fixedly connected to the inner wall of the filter screen 35. The inner ring wall of the first bearing 34 is fixedly connected to the output shaft 42. The outer wall of the output shaft 42 is fixedly connected to the fan blade 32. The outer wall of the output shaft 42 is fixedly connected to the second bearing 37. The outer ring wall of the second bearing 37 is fixedly connected to two sealing boxes 38. The end of the sealing box 38 is fixedly connected to the inner wall of the connecting pipe 25. The inner wall of the sealing box 38 is fixedly connected A cleaning brush 39 is fixedly connected, and the cleaning brush 39 is in frictional contact with the filter 35. An annular tube 40 is fixedly connected to the outer wall of the second bearing 37. Two suction pipes 41 are fixedly connected to the outer wall of the annular tube 40. The suction pipe 41 located above passes through the connecting pipe 25 and extends to its outside. The end of the connecting pipe 25 is fixedly connected to the suction end of the external vacuum cleaner; the second motor 31 drives the fan blades 32 to rotate to generate suction, and introduces external air for ventilation, which helps to reduce the temperature in the screening process and reduce dust accumulation. At the same time, the design of the filter 35 not only effectively filters the asphalt dust in the air, but also realizes automatic rotation through gear transmission, and rubs with the cleaning brush 39 to clean the blocked dust to avoid affecting the filtering effect; the external vacuum cleaner is combined with the sealing box 38 through the suction pipe 41 to absorb the loose dust on the filter 35. During the operation of the device, centralized dust treatment can be achieved to avoid downtime and affect the screening efficiency.

[0030] Working principle: the granular asphalt is put into the guide ring 2 through the feed hopper 17, and the granular asphalt rolls along the inner wall of the guide ring 2 into the screening cylinders 3 on both sides, the first motor 30 drives the drive shaft 11 to rotate, the drive shaft 11 drives the first gear ring 13 to rotate through the first gear 12, and the first gear ring 13 drives the screening cylinder 3 to rotate, so that the granular asphalt is fully in contact with the inner wall of the screening cylinder 3, and the granular asphalt is screened through the screening holes 5 on the screening cylinder 3, and the qualified granular asphalt falls through the screening holes 5 to the first conveyor 16, and the qualified granular asphalt is transported by the first conveyor 16; When the screening drum 3 rotates, the scraper 9 slides along the inner wall of the annular groove 4 in the screening drum 3. When the scraper 9 slides, it passes through a plurality of screening holes 5, and can squeeze the asphalt particles blocked in the screening holes 5, so that the asphalt particles are squeezed out along the inclined surface 10 on the scraper 9; Unqualified asphalt particles roll along the screening cylinder 3 into the guide pipe 14, and roll along the guide pipe 14 into the storage cylinder 19, and the unqualified asphalt particles can be transported by the second conveyor 21; During the screening process, the second motor 31 drives the output shaft 42 to rotate, and the output shaft 42 drives the fan blades 32 to rotate. When the fan blades 32 rotate, suction is generated, so that the external air enters the screening cylinder 3 through the feed hopper 17, the air intake net 23, the installation cylinder 1 and the storage cylinder 19, and is discharged through the exhaust net 28; The asphalt dust in the air is filtered through the filter 35. When the drive shaft 11 rotates, the second gear 33 is driven to rotate, and the second gear ring 36 is driven to rotate through the second gear 33, and the filter 35 is driven to rotate through the second gear ring 36. When the filter 35 rotates, it rubs against the cleaning brush 39 in the sealing box 38, and the dust blocked on the filter 35 is cleaned by the cleaning brush 39. The external vacuum cleaner absorbs the loose dust attached to the filter 35 through the suction pipe 41. The sealing box 38 can prevent the dust from spreading during the cleaning process. At the same time, the suction force of the suction pipe 41 is controlled within the sealing box 38, making the suction force more concentrated.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A granular asphalt screening device for petroleum asphalt production, characterized in that: include: A mounting tube (1), and a material guide ring (2) sleeved inside the mounting tube (1); A screening cylinder (3), the screening cylinder (3) being rotatably connected to both ends of the guide ring (2), the inner wall of the screening cylinder (3) being provided with a plurality of annular grooves (4), the inner wall of the annular groove (4) being provided with a plurality of screening holes (5) for screening granular asphalt; A support rod (6), wherein the support rod (6) is sleeved inside the material guide ring (2) and the screening cylinder (3); A fixing ring (7), wherein the fixing ring (7) is sleeved on the support rod (6) and fixedly connected thereto; A rotating arm (8), wherein the rotating arm (8) is fixedly connected to the fixing ring (7); A scraper (9), the scraper (9) is fixedly connected to the end of the rotating arm (8), the scraper (9) is slidably connected to the inner wall of the annular groove (4), and the outer wall of the scraper (9) is provided with an inclined surface (10); The inner walls of both ends of the installation cylinder (1) are fixedly connected with a material guide pipe (14), and the ends of the material guide pipe (14) are respectively rotatably connected to the screening cylinder (3). The outer walls of the material guide pipe (14) are fixedly connected with a material storage cylinder (19), and the inner wall of one of the material storage cylinders (19) is fixedly connected with an air intake net (23), and the air intake net (23) is fixedly connected to the support rod (6). The inner wall of the other material storage cylinder (19) is fixedly connected with a connecting pipe (25), and an external pipe (26) is provided at one side of the outer port of the connecting pipe (25). The outer wall of the external pipe (26) is fixedly connected with a plurality of support arms (27), and the ends of the support arms (27) are respectively fixedly connected to the material storage cylinder (19). The inner wall of the external pipe (26) is fixedly connected with an exhaust net (28); A drive assembly, the drive assembly is used to drive the screening drum (3) to rotate, the drive assembly comprises a drive shaft (11) and a frame (29), both ends of the drive shaft (11) respectively penetrate the mounting drum (1) and are rotatably connected thereto, the outer wall of the drive shaft (11) is fixedly connected with a first gear (12), the outer wall of the screening drum (3) is fixedly connected with a first gear ring (13), the first gear (12) meshes with the first gear ring (13), the outer wall of the frame (29) is fixedly connected with a first motor (30), the output end of the first motor (30) is fixedly connected to the drive shaft (11), the frame (29) is fixedly connected to the exhaust net (28), the inner wall of the frame (29) is fixedly connected with a second motor (31), the output end of the second motor (31) is fixedly connected with an output shaft (42), and the outer wall of the output shaft (42) is fixedly connected with a fan blade (32).

2. The granular asphalt screening equipment for petroleum asphalt production according to claim 1, characterized in that: The inner wall diameter of the guide ring (2) gradually increases from the middle to both ends thereof, and the inner wall diameter of the screening cylinder (3) gradually increases from one end close to the guide ring (2) to the other end thereof.

3. The granular asphalt screening equipment for petroleum asphalt production according to claim 2, characterized in that: The outer wall of the guide ring (2) is provided with a feed hole (18), the inner wall of the mounting cylinder (1) is fixedly connected with a feed hopper (17), and the inner end of the feed hopper (17) is fixedly connected to the feed hole (18).

4. The granular asphalt screening equipment for petroleum asphalt production according to claim 3, characterized in that: The inner wall diameter of the material guide tube (14) gradually increases from one end close to the screening cylinder (3) to the other end thereof.

5. The granular asphalt screening equipment for petroleum asphalt production according to claim 4, characterized in that: The outer wall of the installation cylinder (1) is fixedly connected to a first bracket (15), the inner wall of the first bracket (15) is installed with a first conveyor (16), the outer wall of the storage cylinder (19) is fixedly connected to a second bracket (20), and the inner wall of the second bracket (20) is installed with a second conveyor (21).

6. The granular asphalt screening equipment for petroleum asphalt production according to claim 5, characterized in that: The outer wall of the mounting cylinder (1) is provided with a mounting hole (24), and the first gear (12) is located in the mounting hole (24).

7. The granular asphalt screening equipment for petroleum asphalt production according to claim 6, characterized in that: The end of the output shaft (42) passes through the exhaust net (28) and extends into the external pipe (26); the end of the output shaft (42) is fixedly connected to a connecting shaft (22); and the connecting shaft (22) is rotatably connected to the support rod (6); A filter screen (35) is rotatably connected between the connecting tube (25) and the external tube (26); a second gear ring (36) is fixedly connected to the outer wall of the filter screen (35); a second gear (33) is fixedly connected to the outer wall of the driving shaft (11); and the second gear (33) is meshed with the second gear ring (36); The inner wall of the filter screen (35) is fixedly connected to a first bearing (34), the inner ring wall of the first bearing (34) is fixedly connected to an output shaft (42), the outer wall of the output shaft (42) is fixedly connected to a second bearing (37), the outer ring wall of the second bearing (37) is fixedly connected to two sealing boxes (38), the end of the sealing box (38) is fixedly connected to the inner wall of the connecting pipe (25), the inner wall of the sealing box (38) is fixedly connected to a cleaning brush (39), and the cleaning brush (39) is in frictional contact with the filter screen (35); An annular tube (40) is fixedly connected to the outer wall of the second bearing (37), and two suction pipes (41) are fixedly connected to the outer wall of the annular tube (40), the suction pipe (41) located at the top passes through the connecting pipe (25) and extends to the outside thereof, and the end of the connecting pipe (25) is fixedly connected to the suction end of an external vacuum cleaner.

8. A method for screening granular asphalt for petroleum asphalt production, applicable to the granular asphalt screening device for petroleum asphalt production according to claim 7, characterized in that: The following steps are involved: S1. Granular asphalt is fed into a guide ring (2) through a feed hopper (17). The granular asphalt rolls along the inner wall of the guide ring (2) into the screening cylinders (3) on both sides. The first motor (30) drives the drive shaft (11) to rotate. The drive shaft (11) drives the first gear ring (13) to rotate through the first gear (12). The first gear ring (13) drives the screening cylinder (3) to rotate, so that the granular asphalt fully contacts the inner wall of the screening cylinder (3). The granular asphalt is screened through the screening holes (5) on the screening cylinder (3). Qualified granular asphalt falls through the screening holes (5) onto the first conveyor (16). The qualified granular asphalt is transported through the first conveyor (16); S2, when the screening drum (3) rotates, the scraper (9) slides along the inner wall of the annular groove (4) in the screening drum (3), and when the scraper (9) slides, it passes through the plurality of screening holes (5), thereby squeezing the asphalt particles blocked in the screening holes (5), so that the asphalt particles are squeezed out along the inclined surface (10) on the scraper (9); S3, the unqualified asphalt particles roll along the screening cylinder (3) into the guide pipe (14), and then roll along the guide pipe (14) into the interior of the storage cylinder (19), and the unqualified asphalt particles are transported by the second conveyor (21); S4, during the screening process, the second motor (31) drives the output shaft (42) to rotate, and the output shaft (42) drives the fan blades (32) to rotate. When the fan blades (32) rotate, suction is generated, so that external air enters the screening cylinder (3) through the feed hopper (17), the air intake net (23), the installation cylinder (1) and the storage cylinder (19), and is discharged through the exhaust net (28); S5, filtering asphalt dust in the air through the filter (35), when the driving shaft (11) rotates, the second gear (33) is driven to rotate, the second gear ring (36) is driven to rotate through the second gear (33), and the filter (35) is driven to rotate through the second gear ring (36), when the filter (35) rotates, friction is generated with the cleaning brush (39) in the sealing box (38), and the dust blocked on the filter (35) is cleaned by the cleaning brush (39); S6. The external vacuum cleaner absorbs loose dust attached to the filter screen (35) through the suction pipe (41). The sealing box (38) prevents dust from spreading during the cleaning process. At the same time, the suction force of the suction pipe (41) is controlled within the sealing box (38), so that the suction force is more concentrated.

Images