Efficient drum screen with screen hole cleaning device

Abstract

The utility model relates to the technical field of mechanical engineering, in particular to an efficient drum screen with a screen hole cleaning device, the efficient drum screen comprises a main screening mechanism and a screen hole cleaning mechanism, the main screening mechanism comprises a main machine frame, a screen drum, a feeding hopper, a discharging hopper, a gear motor and a main shaft; the sieve hole cleaning mechanism comprises a driving chain wheel, a driven chain wheel, a chain, a driving gear, a driven gear, a short shaft, a cam shaft, a bearing seat, a spring, a pull rod, a tensioning wheel, a fixing arm, an adjusting screw, a vibrating and rolling device and a support. The rapping and rolling device is composed of a frame body, a roller type hammer head, a rotating shaft and a fixed shaft. When the screen drum works, the rapping and rolling device acts synchronously, and material particles embedded in the screen holes are vibrated off or extruded into the screen drum through the double functions of rapping and rolling, so that the screen holes are cleaned, and the problem of blockage of the screen holes is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical engineering technical field especially relates to a high -efficient drum screen with screen hole cleaning device. BACKGROUND

[0002] Drum screen is a simple and applicable screening equipment, which has been widely used in industrial and agricultural production. By setting different aperture on the screen cylinder of a device in sections, a plurality of specifications of material of different particle sizes can be screened at the same time. But drum screen also has obvious shortcomings, the main problem is that the screen hole is easy to be blocked in the use process, which affects the material screening efficiency and product quality, so manual dredging method is generally needed according to the screen hole blockage degree in the production and processing process. Manual processing of screen hole blockage needs to stop, which not only affects the work efficiency, but also increases the labor intensity. In order to solve this problem, technicians have taken various measures, but the existing technology is generally for specific materials and use conditions, which is not universally applicable, and the effect is not ideal. Especially for the material with small particle size and irregular shape, some particles will be embedded in the screen hole. Generally, the screen cylinder is made of thin steel wire or thin steel plate, so the particles embedded in the screen hole often pass through the screen cylinder, that is, the particles embedded in the screen hole will protrude out of the surface of the screen cylinder. And with the impact of the subsequent material, the particles embedded in the screen hole will be more compact, and it is difficult to fall off by itself, which reduces the use effect of the existing drum screen. SUMMARY

[0003] The utility model provides a high -efficient drum screen with screen hole cleaning device. The problem that the particle material blocks the screen hole in the production process of drum screen is solved. The automatic screen hole blockage cleaning device is installed on the original equipment, which does not need manual assistance, the whole system structure is compact, the cleaning efficiency is high, the workload of the site operator is reduced, and the use effect of the drum screen is guaranteed. And the whole equipment has good sealing effect, which is beneficial to environmental protection.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] The utility model discloses a high -efficient cylinder screen with screen hole cleaning device, its characterized in being composed of main screening mechanism and screen hole cleaning mechanism, the main screening mechanism includes main frame, screen cylinder, feeding hopper, discharge hopper, speed reducer motor and main shaft group, and the main shaft is installed on the main frame, and the screen cylinder is installed on the main shaft, and the upper portion of main frame is installed the feeding hole, and the lower portion is installed the discharge port, and the speed reducer motor is installed on the frame and is connected with the main shaft, and the main shaft is driven to rotate through the speed reducer motor, and the screen cylinder is driven to rotate through the main shaft, thereby completing the material screening, and the screen hole cleaning mechanism includes driving sprocket, driven sprocket, chain, driving gear, driven gear, short shaft, camshaft, bearing, spring, pull rod, vibration and beating roller and support group, and the vibration and beating roller is composed of frame, gyro wheel type hammer head, rotary shaft and fixed shaft, and the gyro wheel type hammer head, rotary shaft and fixed shaft are installed on the frame and form the vibration and beating roller, and the driving sprocket is installed on the main shaft, and the driven sprocket is installed on the short shaft, and the driving sprocket and driven sprocket are connected through the chain, and the support is installed on the main frame, and the short shaft is installed on the support through the bearing, and the driving gear is installed on the short shaft, and the driven gear is installed on the camshaft, and the driving gear and driven gear are connected through the meshing and complete power transmission, so that when the screen cylinder rotates, the driving sprocket rotates simultaneously, and the driven sprocket and short shaft are driven to rotate through the chain, and the driving gear rotates synchronously and drives the driven gear and camshaft to rotate, and the cam on the camshaft cyclically and discontinuously drives the vibration and beating roller to work, when the cam reaches the position of driving the vibration and beating roller, one end of the rotary shaft of the vibration and beating roller is pressed down, and one end of the gyro wheel type hammer head is lifted, along with the continuous rotation of the camshaft, when the cam is separated from the vibration and beating roller, one end of the gyro wheel type hammer head falls, under the joint action of the spring and gravity, the gyro wheel type hammer head produces the vibration and beating effect to the screen cylinder, and a part of the particles inlaying not firmly falls, when the cam is not in the time period of driving the vibration and beating roller, under the pulling force of the spring and gravity, the surface of the gyro wheel type hammer head is in close contact with the screen cylinder and forms the relative rolling motion state, and enough pressure is maintained, under the pressure, the particles inlaying in the screen hole and protruding on the surface of the screen cylinder are extruded to the inside of the screen cylinder, and the screen hole is dredged, so that the purpose of timely removing the inlaying particles in the screen hole is realized through the vibration and beating and rolling effects, and the cylinder screen keeps the best working state.

[0006] The cylinder screen with the screen hole cleaning device can realize the vibration and beating and extrusion alternately and effectively remove the inlaying material particles in the screen hole in time, so as to ensure the working efficiency of the cylinder screen.

[0007] Compared with the prior art, the utility model has the advantages of:

[0008] 1) by installing the vibration and rolling device on the drum screen, the vibration and rolling device is synchronous with the drum screen, through the double action of vibration and rolling, the particles embedded in the screen hole are removed in time, manual cleaning is avoided, the labor intensity is reduced, and the working efficiency of the drum screen is improved.

[0009] 2) one end of the vibration and rolling device is connected with the main body through a spring, the pressure of the roller type hammer head on the screen cylinder can be adjusted by adjusting the spring tension, the screen cylinder is vibrated with elasticity, buffering effect is achieved, and the effect is better.

[0010] 3) the main part of the vibration mechanism is installed in the equipment cover plate, the whole machine is sealed well, dust collection is facilitated, environmental protection and improvement of working environment are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a high-efficiency drum screen structure schematic diagram with a screen hole cleaning device.

[0012] Figure 2 It is a high-efficiency drum screen plan view with a screen hole cleaning device.

[0013] Figure 3 It is a high-efficiency drum screen left view with a screen hole cleaning device.

[0014] Figure 4 It is a high-efficiency drum screen A-A sectional view with a screen hole cleaning device.

[0015] Figure 5 It is a high-efficiency drum screen B-B sectional view with a screen hole cleaning device.

[0016] Figure 6 It is a high-efficiency drum screen vibration and rolling device isometric view with a screen hole cleaning device.

[0017] Figure 7 It is a high-efficiency drum screen cam shaft isometric view with a screen hole cleaning device.

[0018] In the figure: 101. main screening mechanism 102. vibration and rolling mechanism 1. main frame 2. discharge port 3. screen cylinder 4. main shaft 5.

[0019] Support 6. Reducing motor 7. Bearing A 8. Chain 9. Short shaft 10. Driving gear 11. Driven gear 12. Camshaft 13. Beating roller 14. Cover plate 15. Feeding port 16. Driven sprocket 17. Tensioning wheel 18. Support arm 19. Adjusting screw 20. Driving sprocket 21. Spring 22. Fixed pull rod 1301. Roller hammer head 1302. Frame 1303.

[0020] Fixed shaft 1304. Rotary shaft 23 Bearing B 24 Bearing C DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model will be further explained in combination with the drawings:

[0022] As Figure 1 , 2The high-efficiency drum screen with screen hole cleaning device is characterized in that: a main screening mechanism 101 and a screen hole cleaning mechanism 102 are arranged on a main frame 1, the main screening mechanism 101 comprises a main frame 1, a discharge port 2, a screen drum 3, a main shaft 4, a speed reducer 6 and a cover plate 14, the speed reducer 6 is arranged on the main frame 1, the main shaft 4 is arranged on the main frame 1 through a bearing A 7, the speed reducer 6 is connected with the main shaft 4, the screen drum 3 is arranged on the main shaft, the cover plate 14 is arranged on the main frame 1, the discharge port 2 is arranged on the lower part of the main frame 1, and the feeding port 15 is arranged on the upper part of the main frame 1, the main shaft 2 is driven to rotate by the speed reducer 6, and the main shaft 2 drives the screen drum 3 to rotate, the material to be screened enters the rotating screen drum 3 through the feeding port 2, the material slowly moves forward along with the rotation of the screen drum 3, and the material smaller than the screen hole is screened and discharged from the discharge port 2, and the screen drum 3 is composed of multiple cylinder bodies with different sizes of screen holes according to different particle sizes. The screen hole cleaning mechanism 102 comprises a driving sprocket 20, a chain 8, a support 5, a driven sprocket 16, a short shaft 9, a driving gear 10, a driven gear 11, a cam shaft 12, a vibrating and rolling device 13, a spring 21, a pull rod 22, a bearing 23, a bearing 24, a tensioning wheel 17, a supporting arm 18 and an adjusting screw 19. The vibrating and rolling device 13 is composed of a roller hammer head 1301, a frame 1302, a fixed shaft 1303 and a rotating shaft 1304. The driving sprocket 20 is arranged on the main shaft 4, the driven sprocket 16 is arranged on the short shaft 9, the short shaft 9 is arranged on the support 5 through the bearing B 23, and the support 5 is arranged on the main frame. The driving sprocket 20 and the driven gear 11 are connected through the chain 8, the driving gear 10 is arranged on the short shaft 9, the driven gear 11 is arranged on the cam shaft 12, the cam shaft 12 is arranged on the support 5 through the bearing C 24, and the driving gear 10 is engaged with the driven gear 11. The roller hammer head 1301, the fixed shaft 1303 and the rotating shaft 1304 are arranged on the frame 1302 to form the vibrating and rolling device 13. The vibrating and rolling device 13 is connected with the upper part of the main frame 1 through the spring 21 and the fixed pull rod 22, the spring 21 is hinged to the upper part of the main frame 1 and the frame 1302, the upper part of the fixed pull rod 22 is rigidly connected (welded) with the upper part of the main frame 1, the lower part of the fixed pull rod 22 is connected with the fixed shaft 1303, and the fixed pull rod 22 and the fixed shaft 1303 have relative rotation function. The tensioning wheel 17 is arranged on the supporting arm 18, the supporting arm 18 is arranged on the support 5, and the adjusting screw 19 is arranged on the supporting arm 18. The tensioning of the chain 8 is realized by adjusting the position of the tensioning wheel 17 through the adjusting screw 19.The driving sprocket 20 installed on the main shaft 4 rotates with the screen cylinder 3, and drives the driven sprocket 11 through the chain 10, the driving sprocket 10 rotates through the short shaft 9, the driving sprocket 10 drives the driven gear 11 to rotate through the meshing, the driven gear 11 drives the camshaft 12 to rotate, when the cam on the camshaft 12 contacts with the rotary shaft 1304 on the beating and rolling device 13, the beating and rolling device 13 rotates around the fixed shaft 1303, at this time, the spring 21 is stretched under the action of the lever principle, the rotary shaft 1304 on the beating and rolling device 13 is pressed down at one end, and the roller hammer 1301 at the other end is lifted up, when the cam on the camshaft 12 is separated from the rotary shaft 1304 on the beating and rolling device 13, the roller hammer 1301 falls down and beats on the surface of the screen cylinder 3, so that part of the particles embedded not firmly are shaken off, when the beating and rolling device 13 is separated from the cam, the roller hammer 1301 is in full contact with the surface of the screen cylinder under the action of the weight and the tension of the spring 21, and enough pressure is generated to form extrusion pressure to extrude the relatively firm particles protruding out of the surface of the screen cylinder after being beaten, so that the problems of screen hole blockage and cleaning are solved through the double action of beating and extrusion.

[0023] The following examples are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following examples. The methods used in the following examples are all conventional methods unless otherwise specified.

[0024]

EXAMPLE

[0025] As shown in Figure 1 , 2 , 3, 4, 5, according to the design requirements, 1. The main frame 2. The discharge port 3. The screen cylinder 4. The main shaft 5. The support 6. The reduction motor 7. The bearing A 8. The chain 9. The short shaft 10. The driving gear 11. The driven gear 12. The camshaft 13. The beating and rolling device 14. The cover plate 15. The feeding port 16. The driven sprocket 17. The tension pulley 18. The fixed arm 19. The adjusting screw 20. The driving sprocket 21. The spring 22. The fixed pull rod 1301. The roller hammer 1302. The frame 1303. The fixed shaft 1304. The rotary shaft 23. The bearing B 24. The bearing C.

[0026] As shown in Figure 1 , 3, 4, 5, 6, 7, the host frame 1, discharge port 2, screen cylinder 3, main shaft 4, reduction motor 6, cover plate 14, feed port 15, assembled into the main screening mechanism 101. The roller hammer head 1301, fixed shaft 1303, rotary shaft 1304 installed on the frame 1302 to form a beating mill 13. The drive sprocket 20, chain 8, bracket 5, driven sprocket 16, short shaft 9, drive gear 10, driven gear 11, tension pulley 17, fixed arm 18, adjusting screw 19, camshaft 12, beating mill 13, spring 21, pull rod 22, bearing B 23 and bearing C 24 constitute the screen hole cleaning mechanism 102.

[0027] The main shaft 5 rotates after the reduction motor 6 starts, driving the screen cylinder 3 fixed on the main shaft 4 to rotate. The material to be screened is evenly added from the feed port 15 into the screen cylinder 3 and rotates with the screen cylinder 3. Because the equipment has a certain inclination during installation, the material automatically flows in the lower direction. In this way, under the action of multiple forces, particles smaller than the screen hole are screened out and discharged through the discharge port 2, completing the material screening process. If a material with a large particle size range needs to be screened into several particle sizes, the screen cylinder 3 is composed of multiple screen cylinders with corresponding hole diameters. During the material screening process, some material particles will gradually embed in the screen hole, which will affect the screening efficiency and product quality if not handled in time.

[0028] The equipped screen hole cleaning device is driven by the driving sprocket 20 installed on the main shaft 4, so when the equipment is started, the driving sprocket 20 rotates synchronously with the rotation of the main shaft 4, and drives the driven sprocket 16 to rotate through the chain 8, and the short shaft 9 is driven to rotate by the driven sprocket 16, at this time the driving gear 10 installed on the short shaft 9 rotates, the driven gear 11 engaged with the driving gear 10 rotates, and the cam shaft 12 connected with the driven gear 11 rotates, and a plurality of cams are uniformly distributed on the cam shaft 12 at different angles, and the number of the cams matches the number of the beating and rolling device 13. During the rotation of the cam shaft 12, when the cam on the cam shaft 12 contacts the rotary shaft 1304 on the beating and rolling device 13, the rotary shaft 1304 on the beating and rolling device 13 is pressed down on one side, and the spring 21 is elongated, and the roller hammer 1301 on the other side is lifted up, and as the cam shaft 12 continues to rotate, when the cam in contact with the beating and rolling device 13 is disengaged, the spring 21 is contracted, and under the action of the spring tension and the gravity of the beating and rolling device 13, the roller hammer 1301 produces a knocking effect on the screen cylinder 3, so that part of the particles embedded in the screen hole are shaken off. After the idle period when the cam is not in contact, under the action of the spring tension and the gravity of the beating and rolling device 13, the surface of the roller hammer 1301 is in close contact with the surface of the screen cylinder 3 and has enough pressure to extrude the particles embedded in the screen hole and protruding outside the surface of the screen cylinder 3, so that most of the blocked screen holes are unblocked through the double action of shaking and extruding. It should be noted that most of the time the screen cylinder is made of thin steel plate or thin steel wire, so under normal circumstances only the particles protruding from the inside to the outside of the screen cylinder can maintain a stable embedding state, so the rolling and pressing method has better effect.

[0029] The utility model discloses rational structure, simple equipment, convenient to use, and the screen hole cleaning is automatically carried out, and the heavy physical labour is eliminated, and the work efficiency of drum screen is improved obviously, can effectively ensure screening product quality, and the device is small to the screen cylinder wear, can prolong equipment life, and it is favorable to reduce production cost, improve economic benefit.

Claims

1. A high efficiency trommel screen with screen aperture cleaning means, characterised in that, The main screening mechanism comprises a main frame, a screen cylinder, a feeding hopper, a discharging hopper, a speed reduction motor and a main shaft, the main shaft is installed on the main frame, the screen cylinder is installed on the main shaft, the upper part of the main frame is provided with a feeding hole, and the lower part is provided with a discharging hole; The speed reduction motor is installed on the frame and connected with the main shaft; the main shaft is driven to rotate by the speed reduction motor, the screen cylinder is driven to rotate by the main shaft, and thus the material screening is completed; the screen hole cleaning mechanism comprises a driving sprocket, a driven sprocket, a chain, a driving gear, a driven gear, a short shaft, a cam shaft, a bearing, a spring, a pull rod, a vibrating and rolling device and a support; the vibrating and rolling device comprises a frame, a roller type hammer head, a rotary shaft and a fixed shaft, the roller type hammer head, the rotary shaft and the fixed shaft are installed on the frame to form the vibrating and rolling device; the driving sprocket is installed on the main shaft, the driven sprocket is installed on the short shaft, and the driving sprocket and the driven sprocket are connected by the chain; the support is installed on the main frame, the short shaft is installed on the support by the bearing, and the driving gear is installed on the short shaft; the driven gear is installed on the cam shaft; in this way, when the screen cylinder rotates, the driving sprocket rotates simultaneously, the driven sprocket is driven to rotate by the chain, the driving gear rotates, the driven gear rotates, the cam shaft rotates, the vibrating and rolling device is driven to vibrate the screen cylinder by the cam to make some particles embedded not firmly fall off, when the cam is separated from the vibrating and rolling device, the roller and the screen cylinder form relative movement and generate enough pressure to extrude the particles embedded in the screen hole into the screen cylinder, and the screen hole is cleaned.

2. A high efficiency drum screen with screen hole cleaning device according to claim 1, characterized in that, The drum screen is provided with multiple vibrating and rolling devices and corresponding cams according to needs, and the vibrating and rolling and the roller extruding are alternately performed when the drum screen continuously works.

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