Vibrating screen with adjustable vibration frequency

Abstract

The vibrating screen with the adjustable vibration frequency comprises a screening box, a discharging box is fixedly connected to the top end of the screening box and located at the position of a feeding port, and a guiding inclined plate is fixedly connected to the interior of the discharging box and located at the position of a discharging port. Feeding rollers are rotationally connected to the two side walls in the discharging box and located at the discharging port, one end of each feeding roller penetrates through one side wall in the discharging box to be in transmission connection with a driving motor, and the output end of the driving motor is fixedly connected with one side of the discharging box. The adjusting plate is driven by the air cylinder to move upwards or downwards, so that the gap between the bottom end of the adjusting plate and the feeding roller is increased or decreased, the feeding speed is adjusted, meanwhile, materials can fall into the screening box more evenly through the feeding roller, the situation that the materials are accumulated can be effectively prevented, and the screening efficiency is improved. The screening efficiency of the materials is improved, and meanwhile screening hole blocking caused by material accumulation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating screens, in particular to a vibrating screen with adjustable vibration frequency. Background Art

[0002] A vibrating screen is a screening device that uses the reciprocating vibration generated by the excitation of a vibrator. It is mainly composed of a screen, a vibrator (or a vibration motor / exciter) and a screen frame. Its working principle is to use the upper rotating hammer of the vibrator to make the screen surface produce a planar gyratory vibration, while the lower rotating hammer makes the screen surface produce a conical gyratory vibration. It has the advantages of high efficiency, light weight, a complete and diverse series, and multiple levels. It is widely used in many industries, including mining, construction, chemical industry, pharmaceuticals, food processing, metallurgy and environmental protection. It is specifically used for screening ore, coal, limestone, concrete, sand, gravel, chemicals, coatings, paints, pigments, medicines, syrup, flour, sugar, starch, milk powder and other materials.

[0003] In the prior art, for example, Chinese patent CN221133131U discloses "a vibrating screen with graded vibration function", comprising a vibrating box, a vibrating motor fixedly connected to the bottom end of the vibrating box, a connecting assembly fixedly connected to the bottom end of the vibrating box, a first limiting shell extending to the outside of the vibrating box fixedly connected to the inner side of the vibrating box, a first screening plate slidingly connected to the inner side of the first limiting shell, a first screening hole being provided at the top end of the first screening plate, two clamping assemblies fixedly connected to the left end of the vibrating box, one of the clamping assemblies clamping the first screening plate to the inner side of the first limiting shell, and a second limiting shell extending to the outside of the vibrating box fixedly connected to the inner side of the vibrating box.

[0004] At present, most of the vibrating screens with adjustable vibration frequency are loaded with materials in the hopper continuously into the screening box under the action of gravity. In this case, the materials are likely to accumulate on the screen, making it difficult to quickly screen the materials at the top. As a result, some materials cannot be screened during collection, which reduces the quality of the screened materials. In addition, during the accumulation process, the materials at the bottom are easily squeezed into the screen holes, causing the screening plate to be blocked and the screening efficiency to be reduced. Utility Model Content

[0005] The purpose of the utility model is to provide a vibrating screen with adjustable vibration frequency to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vibrating screen with adjustable vibration frequency, comprising a screening box, a top of the screening box and fixedly connected to a discharge box at the feed port position, a guide inclined plate fixedly connected to the inside of the discharge box and at the discharge port position, feed rollers rotatably connected to the two side walls of the inner side of the discharge box and at the discharge port position, one end of the feed roller passes through a side wall of the inner side of the discharge box and is transmission-connected to a drive motor, an output end of the drive motor is fixedly connected to one side of the discharge box, an adjusting cylinder is fixedly connected to the inner side wall of the discharge box, and an output end of the adjusting cylinder An adjusting plate is fixedly connected, and the adjusting plate is located just above the discharge port of the discharge box. A vibration mechanism is fixedly connected to the bottom end of the screening box, wherein, by arranging a feeding roller, it can roll under the drive of a driving motor, so that the material accumulated in the discharge box can be brought out, so that the material can be discharged more evenly, and by arranging a guide inclined plate, the material can be brought closer to the discharge port under the action of gravity, and by arranging an adjusting cylinder, the adjusting plate can be driven to move up and down to realize the adjustment of the size of the discharge port, so that the discharge speed can be controlled manually to prevent the accumulation of materials in the screening box due to excessive discharge.

[0007] As a further preferred embodiment of the present technical solution, a bellows is fixedly connected to the interior of the discharge box, a slag discharge through hole is opened on one side of the discharge box and located at the position of the bellows, a guide pipe is fixedly connected to one side of the discharge box and located at the position of the slag discharge through hole, and the guide pipe is arranged to be tilted upward. By arranging the bellows, air can be drawn into the discharge box from the outside and discharged from the guide pipe, so that impurities such as dust mixed in the material can be removed during the discharge process of the material, and the quality of the material after screening can be improved. By arranging the guide pipe to be tilted upward, lighter materials can be blown into the guide pipe and then returned to the discharge box under the action of gravity, thereby avoiding material waste.

[0008] As a further preferred embodiment of the present technical solution, a No. 1 screen plate is fixedly connected inside the screening box near the top position, a No. 2 screen plate is fixedly connected inside the screening box and below the No. 1 screen plate, and a blanking plate is fixedly connected inside the screening box and below the No. 2 screen plate. The diameter of the sieve holes on the No. 1 screen plate is larger than the diameter of the sieve holes on the No. 2 screen plate. By arranging the No. 1 screen plate, the No. 2 screen plate and the blanking plate, graded screening can be performed, which facilitates the separation of material grades and improves work efficiency.

[0009] As a further preferred embodiment of the present technical solution, a plurality of support rods are fixedly connected to the inner side walls of the screening box and located directly below the No. 1 screening plate, the No. 2 screening plate and the blanking plate. The outer surfaces of the plurality of support rods are in contact with the bottom ends of the No. 1 screening plate, the No. 2 screening plate and the blanking plate respectively. One end of the No. 1 screening plate, the No. 2 screening plate and the blanking plate are fixedly connected with a guide plate. By arranging the support rods, the stability of the No. 1 screening plate, the No. 2 screening plate and the blanking plate during the screening process can be improved, and the service life can be increased. By arranging the guide plates, the materials sent out by the No. 1 screening plate, the No. 2 screening plate and the blanking plate can be guided to different directions for discharge, thereby facilitating the collection of materials.

[0010] As a further preferred embodiment of the present technical solution, buffer legs are fixedly connected to the bottom of the screening box and at the four corners, the outer surfaces of the four buffer legs are sleeved with buffer sleeves, the inner bottom surfaces of the four buffer sleeves are fixedly connected with buffer springs, and the other ends of the four buffer springs are respectively fixedly connected to the bottom ends of the four buffer legs. By arranging the buffer springs, the buffering effect of the screening box can be achieved through cooperation with the buffer legs and the buffer sleeves, thereby avoiding excessive mechanical loss and improving service life.

[0011] As a further preferred embodiment of the present technical solution, the vibration mechanism includes a vibration motor, and two centrifugal discs are clamped at both output ends of the vibration motor, and fixing bolts are threadedly connected to the outer surfaces of the four centrifugal discs. By arranging the centrifugal discs, the vibration motor can be started to drive the centrifugal discs to rotate and generate eccentric force, thereby enabling the screening box to vibrate. When the vibration frequency needs to be changed, it can be achieved by loosening the fixing bolts to change the angle between the two centrifugal discs.

[0012] As a further preferred embodiment of the present technical solution, positioning rods are fixedly connected to the inner side walls of the discharge box, and the outer surfaces of the two positioning rods are in close contact with one side of the adjustment plate. By setting the positioning rods, the adjustment plate can be clamped and positioned to make it more stable.

[0013] As a further preferred embodiment of the present technical solution, a filter plate is fixedly connected to one side of the discharge box and located at the air inlet position of the bellows, and a collecting plate is fixedly connected to the top of the guide inclined plate and located at the edge positions on both sides. By setting the filter plate, the external air can be filtered to prevent external dust and other impurities from entering the interior of the discharge box through the bellows. By setting the collecting plate, the material can be gathered to the middle.

[0014] The utility model provides a vibrating screen with adjustable vibration frequency, which has the following beneficial effects:

[0015] (1) The utility model drives the adjustment plate to move upward or downward through the cylinder, so that the gap between the bottom end of the adjustment plate and the feed roller increases or decreases, thereby adjusting the feed speed. At the same time, the feed roller can make the material fall into the screening box more evenly, which can effectively prevent the accumulation of materials, improve the screening efficiency of materials, and at the same time avoid the stability of screen hole blockage caused by material accumulation.

[0016] (2) The utility model is started by a bellows and blows air to the passing material. During the blowing process, impurities such as dust mixed in the material are blown into the air separation tube and finally blown out of the device, thereby cleaning the fine impurities in the material and improving the quality of the material after screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model as a whole;

[0019] Figure 3 This is a schematic diagram of the internal structure of the blanking box of the utility model;

[0020] Figure 4 This is an exploded schematic diagram of the vibration mechanism structure of the utility model.

[0021] In the figure: 1. Screening box; 2. Discharge box; 3. Guide inclined plate; 4. Feed roller; 5. Drive motor; 6. Adjusting cylinder; 7. Adjusting plate; 8. Bellows; 9. Slag discharge hole; 10. Guide pipe; 11. Screening plate No. 1; 12. Screening plate No. 2; 13. Discharge plate; 14. Support rod; 15. Guide plate; 16. Buffer leg; 17. Buffer sleeve; 18. Buffer spring; 19. Vibration mechanism; 20. Vibration motor; 21. Centrifugal disc; 22. Fixing bolt; 23. Filter plate; 24. Positioning rod; 25. Collection plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] The utility model provides a technical solution: Figure 1-4As shown, in this embodiment, a vibrating screen with adjustable vibration frequency includes a screening box 1, a top of the screening box 1 and fixedly connected to a discharge box 2 at the feed port position, a guide inclined plate 3 fixedly connected to the inside of the discharge box 2 and at the discharge port position, a feeding roller 4 is rotatably connected to the two side walls of the inner side of the discharge box 2 and at the discharge port position, one end of the feeding roller 4 passes through a side wall of the inner side of the discharge box 2 and is transmission-connected to a driving motor 5, an output end of the driving motor 5 is fixedly connected to one side of the discharge box 2, an adjusting cylinder 6 is fixedly connected to the inner side wall of the discharge box 2, and an adjusting plate 7 is fixedly connected to the output end of the adjusting cylinder 6. The section plate 7 is located just above the discharge port of the discharge box 2, and a vibration mechanism 19 is fixedly connected to the bottom end of the screening box 1. By setting a feed roller 4, it can roll under the drive of the drive motor 5, so that the material accumulated in the discharge box 2 can be brought out, so that the material can be discharged more evenly. By setting a guide inclined plate 3, the material can be brought closer to the discharge port under the action of gravity. By setting an adjusting cylinder 6, the adjusting plate 7 can be driven to move up and down to adjust the size of the discharge port, so that the discharge speed can be controlled manually to prevent excessive discharge and accumulation of material in the screening box 1.

[0024] like Figure 3 and Figure 4 As shown, a bellows 8 is fixedly connected to the inside of the discharge box 2, and a slag discharge through hole 9 is opened on one side of the discharge box 2 and located at the position of the bellows 8. A guide pipe 10 is fixedly connected to one side of the discharge box 2 and located at the position of the slag discharge through hole 9. The guide pipe 10 is arranged to be tilted upward. By arranging the bellows 8, air can be drawn into the discharge box 2 from the outside and discharged from the guide pipe 10, so that impurities such as dust mixed in the material can be removed during the material discharge process, and the quality of the material after screening can be improved. By arranging the guide pipe 10 to be tilted upward, lighter materials can be blown into the guide pipe 10 and then returned to the discharge box 2 under the action of gravity, thereby avoiding material waste.

[0025] like Figure 4 As shown, a No. 1 screen plate 11 is fixedly connected inside the screening box 1 near the top position, a No. 2 screen plate 12 is fixedly connected inside the screening box 1 and below the No. 1 screen plate 11, and a blanking plate 13 is fixedly connected inside the screening box 1 and below the No. 2 screen plate 12. The diameter of the sieve holes on the No. 1 screen plate 11 is larger than the diameter of the sieve holes on the No. 2 screen plate 12. By arranging the No. 1 screen plate 11, the No. 2 screen plate 12 and the blanking plate 13, graded screening can be performed, which facilitates the separation of material grades and improves work efficiency.

[0026] like Figure 2 and Figure 3As shown, multiple support rods 14 are fixedly connected to the inner side walls of the screening box 1 and located directly below the No. 1 screening plate 11, the No. 2 screening plate 12 and the blanking plate 13. The outer surfaces of the multiple support rods 14 are in contact with the bottom ends of the No. 1 screening plate 11, the No. 2 screening plate 12 and the blanking plate 13 respectively. One end of the No. 1 screening plate 11, the No. 2 screening plate 12 and the blanking plate 13 is fixedly connected with a guide plate 15. By arranging the support rods 14, the stability of the No. 1 screening plate 11, the No. 2 screening plate 12 and the blanking plate 13 during the screening process can be improved and the service life can be improved. By arranging the guide plates 15, the materials sent out by the No. 1 screening plate 11, the No. 2 screening plate 12 and the blanking plate 13 can be guided to different directions for discharge, which is convenient for collecting materials.

[0027] like Figure 2 、 Figure 3 As shown, buffer legs 16 are fixedly connected to the bottom of the screening box 1 and at the four corners. Buffer sleeves 17 are sleeved on the outer surfaces of the four buffer legs 16. Buffer springs 18 are fixedly connected to the inner bottom surfaces of the four buffer sleeves 17. The other ends of the four buffer springs 18 are respectively fixedly connected to the bottom ends of the four buffer legs 16. By arranging the buffer springs 18, the buffering effect of the screening box 1 can be achieved through cooperation with the buffer legs 16 and the buffer sleeves 17, thereby avoiding excessive mechanical loss and improving service life.

[0028] like Figure 2 and Figure 3 As shown, the vibration mechanism 19 includes a vibration motor 20, and two centrifugal discs 21 are clamped at both output ends of the vibration motor 20. The outer surfaces of the four centrifugal discs 21 are threadedly connected with fixing bolts 22. By arranging the centrifugal discs 21, the vibration motor 20 can be started to drive the centrifugal discs 21 to rotate and generate eccentric force, thereby enabling the screening box 1 to vibrate. When the vibration frequency needs to be changed, it can be achieved by loosening the fixing bolts 22 to change the angle between the two centrifugal discs 21.

[0029] like Figure 1 As shown, positioning rods 24 are fixedly connected to the two side walls inside the blanking box 2, and the outer surfaces of the two positioning rods 24 are in close contact with one side of the adjustment plate 7. By setting the positioning rods 24, the adjustment plate 7 can be clamped and positioned to make it more stable.

[0030] like Figure 1 As shown, a filter plate 23 is fixedly connected to one side of the discharge box 2 and located at the air inlet position of the bellows 8, and a collecting plate 25 is fixedly connected to the top of the guide inclined plate 3 and located at the edge positions on both sides. By setting the filter plate 23, it is possible to filter the external air and prevent external dust and other impurities from entering the interior of the discharge box 2 through the bellows 8. By setting the collecting plate 25, the material can be gathered to the middle.

[0031] The utility model provides a vibrating screen with adjustable vibration frequency, and the specific working principle is as follows:

[0032] The staff starts the regulating cylinder 6, which drives the regulating plate 7 to move downward, reducing the gap between the feeding roller 4 and the regulating plate 7. After that, the staff pours the material to be screened into the discharge box 2 and starts the vibration motor 20 and the drive motor 5. The drive motor 5 drives the feeding roller 4 to rotate. The material enters between the regulating plate 7 and the feeding roller 4 under the guidance of the guide inclined plate 3 and the collecting plate 25 and is temporarily blocked. As the feeding roller 4 rotates, the blocked material is slowly pushed into the inside of the discharge box 2. When the material passes through the bellows 8, the dust and other impurities in the material are blown out of the guide pipe 10 under the action of the blowing force of the bellows 8, and are finally discharged out of the device. When some Under the action of the bellows 8, smaller materials enter the guide pipe 10 due to the deviation of their falling position. They will stay on the inclined surface due to gravity and eventually return to the inside of the discharge box 2 under the action of gravity. After the materials enter the screening box 1, the vibration motor 20 drives the centrifugal disc 21 to rotate to generate centrifugal force, so that the No. 1 screening plate 11, the No. 2 screening plate 12 and the discharge plate 13 in the screening box 1 vibrate together, and the materials are driven to move and be sorted during the vibration process. The sorted materials are finally collected under the action of the guide plate 15. When the vibration frequency needs to be adjusted, it can be achieved by loosening the fixing bolts 22 to change the angle between the two centrifugal discs 21.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibrating screen with adjustable vibration frequency, comprising a screening box (1), characterized in that: The top of the screening box (1) is fixedly connected to a discharge box (2) at the feed port position, the interior of the discharge box (2) is fixedly connected to a guide inclined plate (3) at the discharge port position, the inner side walls of the discharge box (2) are rotatably connected to feed rollers (4) at the discharge port position, one end of the feed roller (4) passes through an inner side wall of the discharge box (2) and is transmission-connected to a drive motor (5), the output end of the drive motor (5) is fixedly connected to one side of the discharge box (2), an adjusting cylinder (6) is fixedly connected to an inner side wall of the discharge box (2), the output end of the adjusting cylinder (6) is fixedly connected to an adjusting plate (7), the adjusting plate (7) is located directly above the discharge port of the discharge box (2), and the bottom end of the screening box (1) is fixedly connected to a vibration mechanism (19).

2. A vibrating screen with adjustable vibration frequency according to claim 1, characterized in that: A bellows (8) is fixedly connected inside the discharge box (2), a slag discharge through hole (9) is provided through one side of the discharge box (2) at the position of the bellows (8), a guide pipe (10) is fixedly connected to one side of the discharge box (2) at the position of the slag discharge through hole (9), and the guide pipe (10) is arranged to be tilted upward.

3. A vibrating screen with adjustable vibration frequency according to claim 2, characterized in that: A No. 1 screen plate (11) is fixedly connected inside the screening box (1) and near the top position, a No. 2 screen plate (12) is fixedly connected inside the screening box (1) and below the No. 1 screen plate (11), and a blanking plate (13) is fixedly connected inside the screening box (1) and below the No. 2 screen plate (12), wherein the diameter of the screen holes on the No. 1 screen plate (11) is greater than the diameter of the screen holes on the No. 2 screen plate (12).

4. A vibrating screen with adjustable vibration frequency according to claim 3, characterized in that: A plurality of support rods (14) are fixedly connected to the inner side walls of the screening box (1) and located directly below the No. 1 screening plate (11), the No. 2 screening plate (12) and the blanking plate (13), and the outer surfaces of the plurality of support rods (14) are in contact with the bottom ends of the No. 1 screening plate (11), the No. 2 screening plate (12) and the blanking plate (13), respectively. A guide plate (15) is fixedly connected to one end of the No. 1 screening plate (11), the No. 2 screening plate (12) and the blanking plate (13).

5. The vibrating screen with adjustable vibration frequency according to claim 4, characterized in that: The bottom end of the screening box (1) and the four corners are fixedly connected with buffer legs (16), the outer surfaces of the four buffer legs (16) are sleeved with buffer sleeves (17), the inner bottom surfaces of the four buffer sleeves (17) are fixedly connected with buffer springs (18), and the other ends of the four buffer springs (18) are respectively fixedly connected to the bottom ends of the four buffer legs (16).

6. The vibrating screen with adjustable vibration frequency according to claim 1, characterized in that: The vibration mechanism (19) comprises a vibration motor (20), two output ends of the vibration motor (20) are each clamped with two centrifugal discs (21), and the outer surfaces of the four centrifugal discs (21) are each threadedly connected with fixing bolts (22).

7. The vibrating screen with adjustable vibration frequency according to claim 6, characterized in that: Positioning rods (24) are fixedly connected to both side walls of the inner portion of the discharge box (2), and the outer surfaces of the two positioning rods (24) are in close contact with one side of the adjustment plate (7).

8. The vibrating screen with adjustable vibration frequency according to claim 2, characterized in that: A filter plate (23) is fixedly connected to one side of the discharge box (2) and located at the air inlet of the wind box (8), and a material collecting plate (25) is fixedly connected to the top of the guide inclined plate (3) and located at the edge positions on both sides.

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