Bulk material screening roller screen

Abstract

The utility model discloses a large material screening roller screen, and relates to the technical field of material screening. The vibrating screen comprises two screen box plates, an end plate, a bevel discharging plate, a base, a screening shaft, a gear motor and a buffer plate, the end plate is jointly fixed between the ends, close to each other, of the two screen box plates, and a bevel plate is fixed to the upper end of the end plate; an inclined face discharging plate is further fixed to the position, away from the end plate, between the two screening box plates, screening shafts distributed at equal intervals are rotationally connected to the position, between the inclined face discharging plate and the end plate, between the two screening box plates, ribs distributed at equal intervals are fixed to the peripheries of the screening shafts, and screening trays distributed at equal intervals are jointly fixed to the screening shafts and the ribs. Through the arrangement of the screen box plate, the screening shaft, the gear motor, the end plate, the inclined plate, the buffer plate and the inclined surface discharging plate, the problems that a large-granularity material screening roller screen is prone to blocking materials, and when large-granularity materials are screened and fed, the large-granularity materials are prone to causing large impact on parts such as a roller shaft and the like are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of material screening, in particular to a roller screen for screening bulk materials. Background Art

[0002] The screen surface of a roller screen consists of numerous parallel rollers with sieve discs staggered across them. They rotate in the same direction as the material flow. Because the rollers are arranged at different working angles, the material moves faster when it is at a higher working angle, and slower when it is at a lower working angle. When the materials, moving at two different speeds, meet at a certain point on the screen surface, they begin axial movement, evenly distributing the material across the screen surface and improving screening efficiency. However, in actual use, this system still suffers from the following drawbacks:

[0003] Roller screen is a commonly used equipment for material selection and screening in mines. The screening particle size ranges from 10 to 200. However, screening of materials with a particle size greater than 200 is a dividing line in the industry. Screening of this particle size is prone to material jamming and causing equipment damage.

[0004] Secondly, for screening materials with a particle size greater than 200, the material volume is large. When entering the roller screen, the impact on the roller and other screening components is large, which can easily cause damage and deformation, so feed buffering is required. Utility Model Content

[0005] The purpose of the utility model is to provide a roller screen for screening large-particle materials. By arranging a screen box plate, a screening shaft, a reduction motor, an end plate, an inclined plate, a buffer plate, and an inclined discharge plate, the utility model solves the problem that the roller screen for screening large-particle materials is prone to material jamming and the problem that the screening of large-particle materials easily causes a large impact on the roller and other components during feeding.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model is a roller screen for screening bulk materials, comprising two screen box plates, end plates, an inclined discharge plate, a base, a screening shaft, a reduction motor and a buffer plate. An end plate is commonly fixed between the ends of the two screen box plates that are close to each other, and an inclined plate is fixed to the upper end of the end plate; an inclined discharge plate is also fixed at a position between the two screen box plates away from the end plate, and the two screen box plates between the inclined discharge plate and the end plate are rotatably connected with an equidistantly distributed screening shaft, and the outer periphery of the screening shaft is fixed with equidistantly distributed ribs, and the outside of the screening shaft and the ribs are commonly fixed with equidistantly distributed sieve discs; four reduction motors are also provided on the outer side of one of the screen box plates.

[0008] Furthermore, a base is fixed to the lower part of the two screen boxes on the opposite sides, and bearing seats equal in number to the screening shafts are fixed above the base. Both ends of the screening shafts extend out of the screen box plates and are rotatably connected to the bearing seats.

[0009] Furthermore, a pulley is fixed on one end of the screening shaft close to the reduction motor, and a linkage belt is sleeved between two adjacent pulleys, and the end of every five screening shafts is connected to the output shaft of a reduction motor.

[0010] Furthermore, a mounting plate is fixed on a side surface of a base close to the reduction motor, and protective covers are provided outside all the pulleys, and the protective covers are fixed on the mounting plate.

[0011] Furthermore, the two screen box plates are fixed with crisscrossed reinforcing ribs on the opposite sides thereof, and the reinforcing ribs are located above the base. The two screen box plates are provided with limiting grooves on the opposite sides thereof, and sliding rods are fixed in the limiting grooves, and the sliding rod outer sleeve is provided with a buffer spring.

[0012] Furthermore, an inclined buffer plate is movably arranged between the opposite surfaces of the two screen box plates, and sliders are fixed at both ends of the buffer plate. The slider is slidably sleeved outside the slide rod, and the two ends of the buffer spring are respectively fixed on one end of the limiting groove away from the inclined plate and the slider; the buffer plate and the inclined plate are symmetrically arranged.

[0013] Furthermore, the top of the inclined discharge plate is provided with equidistant arc grooves 2, and both ends of the arc grooves 2 are provided with tooth grooves 2; the side of the end plate close to the screening axis is provided with equidistant arc grooves 1, and both ends of the arc grooves 1 are provided with tooth grooves 1; the tooth grooves 1 and 2 correspond to the rotation positions of the sieve plate close thereto, and the arc grooves 1 and 2 correspond to the rotation positions of the ribs close thereto.

[0014] The utility model has the following beneficial effects:

[0015] The utility model solves the problem that the roller screen for screening materials with large particle size is prone to material jamming by arranging a screen box plate, a screening shaft and a reduction motor; the screen shaft is installed by the screen box plate to change the shape of the screening shaft, which is different from the design of the traditional screening roller; ribs distributed in a ring array and sieve plates distributed at equal intervals are arranged on the outer circumference of the screening shaft; multiple screening shafts are arranged in parallel, and the sieve plates and ribs are installed on the screening shaft in unchanged positions to form a screen roller; a large number of screening shafts are driven by a reduction motor, and their rotation direction is the same as the material flow direction, and they move from the end plate toward the inclined discharge plate. In order to loosen the material layer on the screen for easy screening, the screen plate has a polygonal shape. When the equipment is working, two adjacent groups of sieve plates and ribs form multiple channels from feed to discharge, which is different from the traditional cross layout of screen plates (which easily causes material jamming), so that the material moves in a sinusoidal wave shape and the screen surface is wavy, which greatly improves the screening capacity of the equipment and can effectively remove debris and large pieces.

[0016] The utility model solves the problem that large-size materials easily cause great impact on rollers and other components during screening and feeding by arranging end plates, inclined plates, buffer plates and inclined discharge plates; when feeding, large pieces of materials enter from between the inclined plates and the buffer plates and accumulate on the buffer plates until the buffer springs are compressed, causing the buffer plates to move backward, thereby increasing the gap between the buffer plates and the inclined plates, so that the materials fall onto the screening shaft for screening. In this process, the feeding height is effectively lowered, the impact force of large pieces of materials on the screening shaft is reduced, the degree of damage is reduced, and the maintenance cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0018] Figure 1 A perspective view of a roller screen for screening bulk materials;

[0019] Figure 2 This is the status diagram after removing a screen box plate and reduction motor;

[0020] Figure 3 This is the structural diagram of the buffer plate;

[0021] Figure 4 This is the structural diagram of the end plate and the inclined plate;

[0022] Figure 5 This is the structural diagram of the inclined discharge plate;

[0023] Figure 6 This is the structural diagram of the screen box plate;

[0024] Figure 7 It is the structural diagram of the screening shaft;

[0025] Figure 8This is the structural diagram of the protective cover after cutting;

[0026] Figure 9 for Figure 8 A magnified view of the structure at point A;

[0027] Figure 10 A bottom view of a roller screen for screening bulk materials.

[0028] Reference numerals:

[0029] 1. Screen box plate; 101. Reinforcement rib; 102. Limiting groove; 103. Slide rod; 104. Buffer spring; 2. End plate; 201. Inclined plate; 202. Tooth groove 1; 203. Arc groove 1; 3. Inclined discharge plate; 301. Tooth groove 2; 302. Arc groove 2; 4. Base; 401. Bearing seat; 402. Mounting plate; 5. Protective cover; 6. Screening shaft; 601. Ribs; 602. Sieve plate; 603. Linkage belt; 604. Pulley; 7. Reducer motor; 8. Buffer plate; 801. Slider. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-10 As shown, the utility model is a roller screen for screening bulk materials, comprising two screen box plates 1, an end plate 2, an inclined discharge plate 3, a base 4, a screening shaft 6, a reduction motor 7 and a buffer plate 8. The end plate 2 is fixed between the two screen box plates 1 at one end thereof that is close to each other, and an inclined plate 201 is fixed to the upper end of the end plate 2; an inclined discharge plate 3 is also fixed at a position between the two screen box plates 1 away from the end plate 2, and an equidistantly distributed screening shaft 6 is rotatably connected between the two screen box plates 1 between the inclined discharge plate 3 and the end plate 2, and equidistantly distributed ribs 601 are fixed to the outer periphery of the screening shaft 6, and equidistantly distributed sieve discs 602 are fixed to the outside of the screening shaft 6 and the ribs 601; four reduction motors 7 are also provided on the outer side of one of the screen box plates 1;

[0032] The screen box plate 1 is the main mounting component of the screen box and is mainly used to install the screening shaft 6. Its two ends cooperate with the mounting end plate 2 and the inclined discharge plate 3 to form a stable square structure. The inclined plate 201 is provided on the end plate 2 to facilitate feeding and can also accumulate some materials to slow down the feeding speed.

[0033] Different from the traditional design of screening rollers, ribs 601 distributed in a circular array and sieve plates 602 distributed at equal intervals are arranged on the periphery of the screening shaft 6. Multiple screening shafts 6 are arranged in parallel, and the sieve plates 602 and ribs 601 are installed on the screening shaft 6 without changing their positions to form a screening roller. In order to loosen the material layer on the screen for easy screening, the sieve plates 602 are polygonal in shape. When the equipment is working, two adjacent groups of sieve plates 602 and ribs 601 form multiple channels from feeding to discharging. Different from the traditional cross-type screen layout, the material moves in a sinusoidal wave shape and the screen surface is wavy, which is not easy to cause material jamming and blocking.

[0034] A base 4 is fixed to the lower part of the two screen boxes 1 on the opposite side, and a bearing seat 401 equal to the number of screening shafts 6 is fixed on the top of the base 4. Both ends of the screening shaft 6 extend out of the screen box 1 and are rotatably connected to the bearing seat 401.

[0035] The base 4 serves as a mounting carrier, and a bearing seat 401 is mounted on the base 4 to assist the rotation of the screening shaft 6 .

[0036] A pulley 604 is fixed to one end of the screening shaft 6 close to the reduction motor 7, and a linkage belt 603 is sleeved between two adjacent pulleys 604, and the end of every five screening shafts 6 is connected to the output shaft of a reduction motor 7;

[0037] The reduction motor 7 is used to drive the screening shaft 6 to rotate. Since the screening shaft 6 and other components need to screen large pieces of material, they are subjected to great force. A single reduction motor 7 may not be able to meet the driving requirements, so one screening shaft 6 is selected from every five screening shafts 6 to be connected to a reduction motor 7; and the ends of all screening shafts 6 are driven by the linkage belt 603 to drive the pulley 604 to rotate, so that all screening shafts 6 maintain synchronous movement; according to actual conditions, the pulley 604 can be replaced with a sprocket, and the linkage belt 603 can be replaced with a chain.

[0038] A mounting plate 402 is fixed to the side of a base 4 near the reduction motor 7, and a protective cover 5 is provided outside all the pulleys 604, and the protective cover 5 is fixed to the mounting plate 402;

[0039] The mounting plate 402 is used as an auxiliary mounting carrier, and a protective cover 5 is installed on the top thereof. The protective cover 5 is used to protect the transmission parts of the pulley 604 and the linkage belt 603 from being exposed, thereby reducing potential safety hazards and increasing safety.

[0040] The two screen box plates 1 are fixed with crisscross distributed reinforcement ribs 101 on the opposite sides of each other, and the reinforcement ribs 101 are located above the base 4. The two screen box plates 1 are provided with limit grooves 102 on the opposite sides of each other, and a slide rod 103 is fixed in the limit groove 102, and a buffer spring 104 is provided on the outer cover of the slide rod 103;

[0041] An inclined buffer plate 8 is movably provided between the opposite surfaces of the two screen box plates 1, and sliders 801 are fixed at both ends of the buffer plate 8. The sliders 801 are slidably sleeved outside the slide rod 103, and the two ends of the buffer spring 104 are respectively fixed to the end of the limiting groove 102 away from the inclined plate 201 and the slider 801; the buffer plate 8 and the inclined plate 201 are symmetrically arranged;

[0042] The outer side of the screen box plate 1 is provided with reinforcing ribs 101 to increase the structural strength. When feeding, large pieces of material enter between the buffer plate 8 and the inclined plate 201. At this time, the buffer spring 104 is compressed, the buffer plate 8 moves backward, and the slider 801 moves backward outside the slide rod 103. The distance between the inclined plate 201 and the buffer plate 8 increases until the material falls down. In this process, the feeding height is effectively lowered, the impact force of large pieces of material on the screening shaft 6 is reduced, and the degree of damage is reduced.

[0043] The top of the inclined discharge plate 3 is provided with equally spaced arc grooves 302, and both ends of the arc grooves 302 are provided with tooth grooves 301; the side of the end plate 2 close to the screening shaft 6 is provided with equally spaced arc grooves 203, and both ends of the arc grooves 203 are provided with tooth grooves 202; the tooth grooves 202 and the tooth grooves 301 correspond to the rotational positions of the sieve disc 602 close thereto, and the arc grooves 203 and the arc grooves 302 correspond to the rotational positions of the ribs 601 close thereto;

[0044] Arc groove 1 203 and tooth groove 1 202 help to reduce the gap between the inclined discharge plate 3 and the screening shaft 6 adjacent to it, and arc groove 2 302 and tooth groove 2 301 help to reduce the gap between the end plate 2 and the screening shaft 6 adjacent to it, avoiding the accumulation and jamming of small materials under screening.

[0045] The specific working principle of the utility model is: firstly, the sieve box plate 1 is installed as the main body of the sieve box, mainly used for installing the screening shaft 6, the two end portions of which are cooperatively installed with the end plate 2 and the inclined discharge plate 3 to form a stable square structure, which is different from the design of the traditional screening roller shaft, the rib 601 in annular array distribution is arranged on the outer periphery of the screening shaft 6, and the screen disc 602 is distributed at equal intervals, the screening shaft 6 is arranged in parallel in multiple, and the screen disc 602 and the rib 601 are installed on the screening shaft 6 without changing the position to form a screening roller, when feeding, the large material enters between the buffer plate 8 and the inclined plate 201, at this time, the buffer spring 104 is compressed, the buffer plate 8 moves backward, the sliding block 801 moves backward outside the slide rod 103, the distance between the inclined plate 201 and the buffer plate 8 is increased, until the material falls down, then the speed reducer motor 7 drives the screening shaft 6 to rotate, the end portions of all the screening shafts 6 are rotated through the transmission of the linkage belt 603 and the belt pulley 604, so that all the screening shafts 6 keep synchronous movement; when the equipment works, the adjacent two groups of screen discs 602 and ribs 601 form multiple channels from feeding to discharging, which is different from the traditional cross layout of the screen piece (easily causing the material blocking phenomenon), so that the material moves in a sinusoidal wave, the screen surface is in a wave shape, the screening capacity of the equipment is greatly improved, the sundries and large pieces can be effectively stripped and removed, and the screening is completed.

[0046] The above is only the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement of the technical scheme recorded in the foregoing embodiments, belongs to the protection range of the utility model.

Claims

1. A roller screen for screening bulk materials, comprising two screen box plates (1), an end plate (2), an inclined discharge plate (3), a base (4), a screening shaft (6), a reduction motor (7) and a buffer plate (8), characterized in that: An end plate (2) is fixed between the two adjacent ends of the screen box plates (1), and an inclined plate (201) is fixed to the upper end of the end plate (2); an inclined discharge plate (3) is fixed between the two screen box plates (1) at a position away from the end plate (2); equidistantly distributed screening shafts (6) are rotatably connected between the two screen box plates (1) between the inclined discharge plate (3) and the end plate (2), and equidistantly distributed ribs (601) are fixed to the outer periphery of the screening shaft (6), and equidistantly distributed screening discs (602) are fixed to the outside of the screening shaft (6) and the ribs (601); four reduction motors (7) are also provided on the outer side of one of the screen box plates (1).

2. A roller screen for screening bulk materials according to claim 1, characterized in that: A base (4) is fixed to the lower portion of the two screen boxes (1) on the opposite sides thereof, and bearing seats (401) equal in number to the number of screening shafts (6) are fixed above the base (4). Both ends of the screening shafts (6) extend out of the screen boxes (1) and are rotatably connected to the bearing seats (401).

3. The roller screen for screening bulk materials according to claim 1, characterized in that: A pulley (604) is fixed to one end of each screening shaft (6) close to the reduction motor (7), and a linkage belt (603) is sleeved between two adjacent pulleys (604), and the end of each of the five screening shafts (6) is connected to the output shaft of a reduction motor (7).

4. The roller screen for screening bulk materials according to claim 3, characterized in that: A mounting plate (402) is fixed on the side of a base (4) close to the reduction motor (7), and protective covers (5) are provided outside all pulleys (604), and the protective covers (5) are fixed on the mounting plate (402).

5. The roller screen for screening bulk materials according to claim 2, characterized in that: The two screen box plates (1) are fixed with reinforcing ribs (101) distributed in a crisscross pattern on the opposite sides thereof, and the reinforcing ribs (101) are located above the base (4). The two screen box plates (1) are provided with limiting grooves (102) on the opposite sides thereof, and a sliding rod (103) is fixed in the limiting groove (102), and a buffer spring (104) is provided on the outer cover of the sliding rod (103).

6. The roller screen for screening bulk materials according to claim 5, characterized in that: An inclined buffer plate (8) is movably arranged between the opposite surfaces of the two screen box plates (1), and sliders (801) are fixed at both ends of the buffer plate (8), and the sliders (801) are slidably sleeved outside the slide rod (103). The two ends of the buffer spring (104) are respectively fixed to one end of the limiting groove (102) away from the inclined plate (201) and the slider (801); the buffer plate (8) and the inclined plate (201) are symmetrically arranged.

7. The roller screen for screening bulk materials according to claim 1, characterized in that: The top of the inclined discharge plate (3) is provided with an arc groove 2 (302) with equal spacing, and both ends of the arc groove 2 (302) are provided with tooth groove 2 (301); the side of the end plate (2) close to the screening shaft (6) is provided with an arc groove 1 (203) with equal spacing, and both ends of the arc groove 1 (203) are provided with tooth groove 1 (202); the tooth groove 1 (202) and the tooth groove 2 (301) correspond to the rotation position of the sieve plate (602) close thereto, and the arc groove 1 (203) and the arc groove 2 (302) correspond to the rotation position of the rib (601) close thereto.

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