Mine fine material screening system

Abstract

The utility model discloses a fine material screening system for mines, which comprises a feed bin, a vibration distributing mechanism, an upper layer roller screen and a lower layer roller screen, a discharge port of the feed bin is connected with a feed port of the vibration distributing mechanism, the upper layer roller screen is arranged in a step mode to form an upper layer screen group, an upper layer undersize transfer belt is arranged below the upper layer screen group, and a lower layer undersize transfer belt is arranged below the lower layer screen group. The lower-layer roller screen is arranged in a stepped mode to form a lower-layer screen set, a lower-layer screen underflow transfer belt is arranged below the lower-layer screen set, the vibration material distribution mechanism comprises a vibration material distribution box, the vibration material distribution box is hung below the feeding bin, a vibration support is arranged below the vibration material distribution box, and a vibration motor is fixed to the vibration support. A material distribution leakage opening is formed in a bottom plate of the vibration material distribution box; according to the system, a two-way screening structure is adopted, the screening efficiency is greatly improved, non-stop operation can be met, meanwhile, the stepped roller screen structure is adopted, and each roller screen is independent and convenient to overhaul and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of ore material screening, in particular to a fine material screening system for mines. Background Art

[0002] Screening of ore materials is an indispensable step. For example, in the process of mineral sand making, the minerals need to be mined first, crushed and sorted several times, and then washed to obtain the finished sand. In the process of multiple crushing and sorting of minerals, the screening equipment of materials is particularly important. Screening of crushed ore requires the screening device to have efficient screening capabilities and to ensure safe, reliable and stable operation. The current screening device is large in size and the screen body is an integrated structure. Once a failure occurs, it needs to be shut down for maintenance, which delays production. For example, in China Patent application No. 201510328206.1 discloses a screening device for mining, including a frame and a screen bed. The screen bed is placed on the frame through a shock-absorbing mechanism. A vibrator is provided on the screen bed. The motor provided on the frame is connected to the vibrator through a belt drive. A hopper is provided at the bottom of the screen bed. The device is a conventional structure. The problem is that once the screen of the screen body is damaged, it needs to be replaced as a whole, the maintenance cost is high, and the downtime delays production. It cannot meet the needs in actual use, so there is an urgent need for improved technology on the market to solve the above problems. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a fine material screening system for mines. The system adopts a two-way screening structure, the screening efficiency is greatly improved, and it can meet the requirements of non-stop operation. At the same time, a stepped roller screen structure is adopted. Each roller screen is independent and easy to repair and replace. The vibration distribution box not only achieves the effect of uniform material distribution, but also realizes two-way material distribution, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fine material screening system for mining, comprising a feed bin, a vibrating distribution mechanism, an upper roller screen and a lower roller screen, the discharge port of the feed bin is connected to the feed port of the vibrating distribution mechanism, the upper roller screen is arranged in a stepped manner to form an upper screen group, an upper screen under material transfer belt is arranged below the upper screen group, the lower roller screen is arranged in a stepped manner to form a lower screen group, a lower screen under material transfer belt is arranged below the lower screen group, the vibrating distribution mechanism comprises a vibrating distribution box, the vibrating distribution box is suspended below the feed bin, a vibrating bracket is arranged below the vibrating distribution box, a vibrating motor is fixed on the vibrating bracket, a material distribution outlet is arranged on the bottom plate of the vibrating distribution box, the material distribution outlet is connected to the feed port of the lower roller screen through a material distribution chute, and the outlet of the vibrating distribution box is connected to the feed port of the upper roller screen.

[0005] Furthermore, fixed hook points are respectively provided on both sides of the vibrating material distribution box, and a lifting hook is connected to the fixed hook point. The lower part of the feed bin is rotatably connected to a tie rod, and a vibration isolation assembly is provided at the lower end of the tie rod. The vibration isolation assembly includes a vibration isolation frame, which is rotatably connected to the lower end of the tie rod. A lower plate is provided on the inner side of the lower end of the vibration isolation frame, an upper plate is provided above the lower plate, a vibration isolation part is provided between the upper plate and the lower plate, the upper end of the lifting hook passes through the vibration isolation part, and a nut is threadedly connected to the upper end of the lifting hook.

[0006] Furthermore, the vibration isolator is a spring or a rubber block.

[0007] Furthermore, the oversize of the upper screen group and the oversize of the lower screen group flow into the oversize finished product bin through the upper oversize chute and the lower oversize chute respectively, and the upper undersize transfer belt and the lower undersize chute are connected to the undersize finished product bin through the upper undersize chute and the lower undersize chute respectively.

[0008] Furthermore, a valve housing is provided at the lower end of the feed bin, a valve plate is provided in the valve housing, a closing ring is provided above the valve plate, the closing ring is fixed on the inner wall of the valve housing, the lower end of the closing ring corresponds to the valve plate, an electric telescopic rod is provided on one side of the valve housing, the telescopic end of the electric telescopic rod is connected to the valve plate, and the lower end of the valve housing is softly connected to the feed port of the vibrating material distribution box.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The system adopts a two-way screening structure, which greatly improves the screening efficiency and can meet the requirements of non-stop operation. At the same time, it adopts a stepped roller screen structure. Each roller screen is independent, which is convenient for maintenance and replacement. The vibrating material distribution box not only achieves the effect of uniform material distribution, but also realizes two-way material distribution. The screened materials and screened materials of the two paths are stored separately, which is convenient for subsequent further processing.

[0011] 2. The vibration distribution box is suspended under the feed bin, and the vibration transmission is reduced through the vibration isolation component to ensure the safe and reliable operation of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the vibrating cloth mechanism of the utility model;

[0014] Figure 3 Schematic diagram of the vibration isolation component of the utility model Figure 1 ;

[0015] Figure 4 Schematic diagram of the vibration isolation component of the utility model Figure 2 ;

[0016] Figure 5 This is a schematic diagram of the valve housing structure of the utility model.

[0017] In the figure: 1 vibrating material distribution mechanism, 2 upper roller screen, 3 upper sieve material chute, 4 upper sieve material transfer belt, 5 upper sieve material chute, 6 material distribution chute, 7 lower roller screen, 8 lower sieve material transfer belt, 9 lower sieve material chute, 10 lower sieve material chute, 11 sieve material finished product warehouse, 12 sieve material finished product warehouse, 13 feeding warehouse, 14 pair of tie rods, 15 valve plate, 16 valve housing, 17 hook, 18 fixed hook point, 19 vibration motor, 20 vibration bracket, 21 vibration isolation component, 22 vibration material distribution box, 23 electric telescopic rod, 24 nut, 25 spring, 26 lower plate, 27 vibration isolation frame, 28 upper plate, 29 rubber block, 30 closing ring. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] See also Figure 1-5The utility model provides a technical solution: a fine material screening system for mines, comprising a feed bin 13, a vibrating material distribution mechanism 1, an upper roller screen 2 and a lower roller screen 7. The discharge port of the feed bin 13 is connected to the feed port of the vibrating material distribution mechanism 1. The upper roller screen 2 is arranged in a stepped manner to form an upper screen group. The outlets and inlets of adjacent upper roller screens 2 correspond to each other. Each roller screen in the screen group is independent. The stepped arrangement facilitates forward screening of materials. The advantage of such an arrangement is that it is convenient for the maintenance of a single roller screen, and the maintenance cost is low compared to the screen bed. An upper screen undercarriage transfer belt 4 is arranged below the upper screen group. The lower roller screen 7 is arranged in a stepped manner to form a lower screen group. The lower screen group has the same structure as the upper screen group. A lower screen undercarriage transfer belt 8 is arranged below the lower screen group. The vibrating material distribution mechanism 1 includes a vibrating material distribution box 22, which is suspended below the feed bin 13. A vibrating bracket 20 is arranged below the vibrating material distribution box 22, and a vibrating motor 19 is fixed on the vibrating bracket 20. A material distribution leak is arranged on the bottom plate of the vibrating material distribution box 22, and the material distribution leak is connected to the feed port of the lower roller screen 7 through the material distribution chute 6. The outlet of the vibrating material distribution box 22 is connected to the feed port of the upper roller screen 2. The vibrating material distribution box 22 not only achieves the effect of uniform material distribution, but also realizes two-way material distribution, one of which enters the upper screen group and the other enters the lower screen group. The upper and lower screen groups increase the screening ratio of the material and can also achieve non-stop operation. When the upper screen group is shut down for maintenance, it does not affect the normal operation of the lower screen group.

[0020] Fixed hook points 18 are respectively provided on both sides of the vibrating material distribution box 22, and a hook 17 is connected to the fixed hook point 18. The lower part of the feed bin 13 is rotatably connected to the tie rod 14, and a vibration isolation component 21 is provided at the lower end of the tie rod 14. The vibration isolation component 21 includes a vibration isolation frame 27, and the vibration isolation frame 27 is rotatably connected to the lower end of the tie rod 14. A lower plate 26 is provided on the inner side of the lower end of the vibration isolation frame 27, and an upper plate 28 is provided above the lower plate 26. A vibration isolation member is provided between the upper plate 28 and the lower plate 26, and the upper end of the hook 17 passes through the vibration isolation member. A nut 24 is threadedly connected to the upper end of the hook 17, and the hook 17, the upper plate 28, the lower plate 26 and the vibration isolation member are fastened together by the nut 24, and the vibration isolation member plays a role of vibration isolation.

[0021] The vibration isolator is a spring 25 or a rubber block 29 .

[0022] The oversize of the upper screen group and the oversize of the lower screen group flow into the oversize finished product warehouse 11 through the upper oversize chute 3 and the lower oversize chute 9 respectively, and the upper undersize transfer belt 4 and the lower undersize chute 10 are connected to the undersize finished product warehouse 12 through the upper undersize chute 5 and the lower undersize chute 10 respectively, thereby realizing the separate storage of the oversize and undersize.

[0023] A valve housing 16 is provided at the lower end of the feed bin 13, a valve plate 15 is provided in the valve housing 16, a closing ring 30 is provided above the valve plate 15, the closing ring 30 is fixed on the inner wall of the valve housing 16, the lower end of the closing ring 30 corresponds to the valve plate 15, the closing ring 30 reduces the diameter of the blanking material, and facilitates the sealing of the valve plate 15. An electric telescopic rod 23 is provided on one side of the valve housing 16, the telescopic end of the electric telescopic rod 23 is connected to the valve plate 15, and the lower end of the valve housing 16 is softly connected to the feed port of the vibrating material distribution box 22, and the soft connection adopts a bellows connection to reduce the transmission of vibration.

[0024] When in use: the material falls into the vibrating distribution mechanism 1 through the feed bin 13, and the vibrating distribution mechanism 1 can distribute the material evenly; a material distribution leak is provided on the bottom plate of the vibrating distribution box 22, so that the material can enter the upper screen group in one way and the lower screen group in another way; after the material is screened by the upper roller screen 2, the screened material flows into the screened finished product warehouse 11 through the upper screened material chute 3, and the screened material passes through the upper screened material transfer belt 4, and then enters the screened finished product warehouse 12 through the upper screened material chute 5; the other way of the material enters the lower screen group through the distribution chute 6, and the screened material enters the screened finished product warehouse 11 through the lower screened material chute 9; the screened material enters the lower screened material chute 10 through the lower screened material transfer belt 8, and finally enters the screened finished product warehouse 12.

[0025] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A fine material screening system for mining, comprising a feed bin (13), a vibrating material distribution mechanism (1), an upper roller screen (2) and a lower roller screen (7), characterized in that: The discharge port of the feed bin (13) is connected to the feed port of the vibrating distribution mechanism (1); the upper roller screens (2) are arranged in a stepped manner to form an upper screen group; an upper screen under material transfer belt (4) is arranged below the upper screen group; the lower roller screens (7) are arranged in a stepped manner to form a lower screen group; a lower screen under material transfer belt (8) is arranged below the lower screen group; the vibrating distribution mechanism (1) comprises a vibrating distribution box (22); the vibrating distribution box (22) is suspended below the feed bin (13); a vibrating bracket (20) is arranged below the vibrating distribution box (22); a vibrating motor (19) is fixed to the vibrating bracket (20); a material distribution outlet is arranged on the bottom plate of the vibrating distribution box (22); the material distribution outlet is connected to the feed port of the lower roller screen (7) through a material distribution chute (6); and the outlet of the vibrating distribution box (22) is connected to the feed port of the upper roller screen (2).

2. A fine material screening system for mining according to claim 1, characterized in that: Fixed hook points (18) are respectively provided on the two side surfaces of the vibrating material distribution box (22), and a hook (17) is connected to the fixed hook point (18). The lower part of the feed bin (13) is rotatably connected to a tie rod (14), and a vibration isolation component (21) is provided at the lower end of the tie rod (14). The vibration isolation component (21) includes a vibration isolation frame (27), and the vibration isolation frame (27) is rotatably connected to the lower end of the tie rod (14). A lower plate (26) is provided on the inner side of the lower end of the vibration isolation frame (27), and an upper plate (28) is provided above the lower plate (26). A vibration isolation member is provided between the upper plate (28) and the lower plate (26), and the upper end of the hook (17) passes through the vibration isolation member. The upper end of the hook (17) is threadedly connected to a nut (24).

3. A fine material screening system for mining according to claim 1, characterized in that: The vibration isolator is a spring (25) or a rubber block (29).

4. The fine material screening system for mining according to claim 1, characterized in that: The oversize of the upper screen group and the oversize of the lower screen group flow into the oversize finished product bin (11) through the upper oversize chute (3) and the lower oversize chute (9), respectively. The upper undersize transfer belt (4) and the lower undersize chute (10) are connected to the undersize finished product bin (12) through the upper undersize chute (5) and the lower undersize chute (10), respectively.

5. The fine material screening system for mining according to claim 1, characterized in that: A valve housing (16) is provided at the lower end of the feed bin (13), a valve plate (15) is provided in the valve housing (16), a closing ring (30) is provided above the valve plate (15), the closing ring (30) is fixed to the inner wall of the valve housing (16), the lower end of the closing ring (30) corresponds to the valve plate (15), an electric telescopic rod (23) is provided on one side of the valve housing (16), the telescopic end of the electric telescopic rod (23) is connected to the valve plate (15), and the lower end of the valve housing (16) is softly connected to the feed port of the vibrating material distribution box (22).

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