CN201394495Y - Vibrating screw dry separator - Google Patents

Abstract

The utility model relates to a vibrating screw dry separation machine, which is suitable for dry separation of fine coal and other fine minerals. The separator is mainly composed of a spiral cylinder, a vibrating platform, a vibrating device, a spiral groove bed surface, a chute, and a material inlet and outlet nozzle. The spiral groove surface is driven by a double motor to generate a compound motion of vibration and twisting, which overcomes the current fine-grained coal Disadvantages of dry sorting. The resulting shear force separates gangue and coal particles that are clumped together and adheres together, creating preconditions for density separation. Due to the radial inclination of the spiral groove surface, the outside is high and the inside is low, the particles are under the action of inertial force, torsion force, gravity, friction force and wind force, and the material is also moving towards the inside of the spiral groove during the process of moving upward along the spiral groove surface. Realized layering, banding and separation according to different densities. The equipment structure is simple, the design concept is novel, the sorting is stable and reliable, the energy saving is remarkable, the sorting effect is good, and it has wide practicability.

Description

Vibrating screw dry separator

technical field

The utility model relates to a vibrating screw dry sorting machine, which is especially suitable for dry sorting of fine coal and other fine minerals.

Background technique

At present, there are two main types of coal dry separation technology in China: one is the air-dense medium fluidized bed separator developed by China University of Mining and Technology; The FGX type compound dry sorting machine developed on the Internet, and the FX type dry sorting machine developed on the basis of the Russian wind shaker, as well as the CFX type differential wind sorting machine which uses synchronous belt transmission to change the transmission device from this machine. Sorting machine. The first type is to use the gas-solid two-phase to realize the layering and separation of different density granular materials in the fluidized state; the second type is to use the combined effect of wind force and vibration force to make the materials perform spiral turning motion on the sorting bed ( FGX type) or differential motion (FX type, CFX type) to achieve layering and then separation. However, for a large amount of fine-grained materials (<6mm), the separation effect is not ideal, and the lower limit of both separations is 6mm.

The main reasons for the poor separation effect of fine-grained coal (<6mm) are as follows: First, due to the segregation of fine-grained materials, some low-density coarse-grained coal enters the bottom of the separation bed, that is, the gangue layer, resulting in the loss of clean coal; Part of the high-density fine-grained gangue will float on the upper part of the bed under the action of wind force and enter the clean coal layer, causing pollution of the target minerals; third, there is liquid bridge force on the surface of relatively humid fine-grained materials, resulting in fine-grained coal and gangue. The clumps stick together so effective separation cannot be achieved.

Contents of the invention

The purpose of the utility model is to provide a vibrating screw dry sorter with compact structure, simple operation and good sorting effect aiming at the problems existing in the prior art.

In order to achieve the above purpose, the technical solution of the present utility model includes a spiral cylinder body, a dust collection cover arranged on the spiral cylinder body, and a spiral groove with a certain longitudinal inclination angle and a transverse inclination angle, high outside and low inside, is arranged on the inner wall of the spiral cylinder On the bed surface, the top of the dust collection cover is provided with an air inlet corresponding to the middle hole surrounded by the spiral groove bed surface; on the side of the spiral cylinder body, there are inlet and outlet nozzles for feeding materials to the spiral groove bed surface and discharging light products, and There is an air inlet pipe for supplying air to the bottom of the spiral groove bed surface. The bottom end of the spiral cylinder is equipped with an annular vibration platform with an inner hole in the middle of the spiral cylinder. A discharge chute is provided under the middle of the spiral cylinder. The annular vibration platform A vibrating device is arranged on both sides of the lower part, and an elastic support is arranged at the bottom of the vibrating device.

The longitudinal and lateral inclinations of the spiral groove bed surface are about 5 degrees; the vibration device is composed of a V-shaped groove vibration motor seat and a vibration motor obliquely placed in the V-shaped groove; the elastic support is composed of The supporting feet and the rubber springs arranged on the supporting feet are formed.

Beneficial effects: the double motors are used to drive the spiral groove surface to generate a compound motion of vibration and twisting, which overcomes the shortcomings of the current fine coal dry separation method. The generated shear force separates gangue and coal particles that are clumped together and adheres together, creating preconditions for density separation. Due to the radial inclination of the surface of the spiral groove, the outside is high and the inside is low, the particles are under the action of inertial force, torsion force, gravity, friction force and wind force, and the material is also moving towards the inside of the spiral groove during the process of moving upward along the surface of the spiral groove. During the displacement process of vibration, the particles are continuously layered and accumulated towards the inner side of the spiral groove, so that the material on the groove surface forms a wedge surface, that is, the cross section forms a triangle, the inner side is thick and the outer side is thinner. Under the action of vibration force, the light materials on the inner upper layer of the spiral groove continue to slide to the outside of the spiral groove under the action of height gradient and gravity, while the high-density materials sink to the bottom of the groove and move to the inner side. After many reciprocating cycles, the low-density materials are finally distributed on the outside of the spiral groove, while the high-density materials are distributed on the inside of the spiral groove. Realize the zoning of materials with different densities on the groove surface, and intercept the materials of different bands respectively, that is, realize the separation according to different densities. The separation effect of the device is good, the design concept is novel, the equipment structure is simple, the separation is stable and reliable, and it is a high-efficiency dry separation equipment with significant energy saving and consumption reduction.

Description of drawings

Fig. 1 is the structural front view of the vibrating screw dry sorting machine of the present invention;

Fig. 2 is a side view of the structure of the vibrating screw dry separator of the present invention;

Fig. 3 is a top view of the structure of the vibrating screw dry separator of the present invention;

Fig. 4 is a C-C sectional view of Fig. 1 .

In the figure: 1-dust cover; 2-spiral cylinder; 3-vibration platform; 4-spiral groove bed surface; 5-chute; 6-feed nozzle; 7-rubber spring; 8-foot; 9-vibration motor ; 10-vibration motor seat.

Detailed ways

The utility model will be further described below in conjunction with the embodiment in the accompanying drawings:

As shown in Figure 1, the vibrating spiral dry separator of the present invention is mainly composed of a spiral cylinder body 2, a vibrating platform 3, a spiral groove bed surface 4, a chute 5 and a feed nozzle 6. The spiral groove bed surface 4 is arranged on the inner wall of the spiral cylinder body 2, and has a certain longitudinal inclination angle and a transverse inclination angle, and is high on the outside and low on the inside. In the dust collection cover 1, the top of the dust collection cover 1 is provided with an air inlet corresponding to the middle hole surrounded by the spiral groove bed surface 4; The discharge nozzle 6 is provided with an air inlet pipe for supplying air to the bottom of the spiral groove bed surface 4. The bottom end of the spiral cylinder 2 is provided with a ring-shaped vibration platform 3 with an inner hole in the middle of the spiral cylinder. 2. There is a discharge chute 5 under the middle part. The vibration device is arranged on both sides below the ring vibration platform 3. The bottom center of the spiral cylinder 2 is provided with a chute 5 for discharging heavy products. The vibration device consists of a V-shaped groove vibrating motor base 10 and an inclined The vibrating motor 9 is placed in the V-shaped groove. The vibrating motor 9 is the power source of the vibrating screw dry separator. It provides vertical vibrating force and horizontal torsion force. The selection of the vibrating motor 9 depends on the size of the exciting force and range of operating frequencies. The motor base 10 can be assembled and welded, and can also be cast. The bottom of the vibrating device is provided with an elastic support 8, which is composed of a foot 8 and a rubber spring 7 on the foot 8. The rubber spring 7 not only bears the exciting force in the vertical direction, but also bears the vibration torsion in the horizontal direction. ; Bearing 8, as the support of the whole equipment, is a whole, which can be welded with channel steel or cast with a model. The spiral cylinder body 2 is the fixed frame of the spiral groove bed surface 4, as the main part of the vibrating equipment, it is rolled from steel plate and welded at the mouth. The vibrating platform 3 is an intermediate transition connecting part connecting the spiral cylinder 2 and the vibration source system, and acts as an upper and lower link to bear vibration torsion and shearing force. The vibrating platform 3 can be welded from various components as a whole as a welding assembly, or can be cast as a casting as a whole. The vibration platform 3 is to be connected to the working body, which is a circular cylinder, and the bottom is to be connected to the vibration motor support, which is a square leg. The spiral groove bed surface 4 is the working area for material sorting. Its structural layout and surface condition determine the material sorting effect. In order to ensure the rigidity of the bed surface, the spiral groove bed surface 4 is made of steel plate to make a screen surface with holes. ; In order to ensure a better sorting effect, the radial angle and longitudinal angle of the bed working surface are the key factors, so the production must be processed strictly according to the selected parameters. At the same time, the opening of the bed surface is also a key point of production and processing. It is necessary to ensure a sufficient opening rate, and at the same time ensure that the projection of each opening on the horizontal plane is a regular round hole. The production of the spiral groove bed surface 4 selects a steel plate with a certain thickness, and makes a fan-shaped groove surface steel plate according to a certain angle, and then according to the radial and longitudinal angle requirements of the groove surface, it is heated and formed on a special mold, and then vertically drilled . After the production is completed, check the angle of the groove surface and the opening rate, and finally connect the prepared spiral groove surface with the inner and outer cylinders with bolts. The chute 5 is a discharge channel for high-density products (gangue) inside. The inlet and outlet nozzle 6 includes a feed chute and a discharge chute for light products, and both the feed chute and the light product chute are arranged outside the spiral groove. The dust collection cover 1 is a cone, which covers the spiral cylinder body 2, and its through hole is connected with the air inlet duct of the dust removal equipment, so that the working environment is in a closed state and the working environment around the equipment is improved.

Working principle and working process: Double motors are used to drive the spiral groove surface 4 to generate compound motion of vibration and torsion. A certain amount of air volume is supplied under the groove surface or periodically. After the material is fed into the spiral groove surface 4, under the action of the compound force field, the particles go up along the groove surface against the groove surface, and at the same time, the particles achieve different densities in the radial direction. On the spiral groove surface 4 radial bands, so as to achieve the purpose of separating materials with different densities. The specific zoning mainly shows that the low-density material is on the outside of the spiral, and the high-density material is on the inside of the spiral. The material is fed into the groove surface from the inlet and outlet nozzle 6 on the outside of the spiral cylinder 2. Under the action of vibration, torsion and wind, due to the spiral The groove surface 4 has a radial inclination, and the outside is high and the inside is low. Under the action of inertial force, torsion force, gravity, friction force and wind force, the material also moves to the inside of the spiral groove during the upward movement along the spiral groove surface 4 . During the process of vibrating and displacing, the particles are continuously stratified and piled up to the inner side of the spiral groove 4, so that the material on the groove surface forms a wedge surface, that is, the cross section forms a triangle, the inner side is thick and the outer side is thinner. Under the action of vibration force, the light materials on the inner upper layer of the spiral groove continue to slide to the outside of the spiral groove under the action of height gradient and gravity, while the high-density materials sink to the bottom of the groove and move to the inner side. After many reciprocating cycles, the low-density materials are finally distributed on the outside of the spiral groove, while the high-density materials are distributed on the inside of the spiral groove. Realize the zoning of materials with different densities on the groove surface, and intercept the materials of different bands respectively, that is, realize the separation according to different densities.

Claims (4)

1. A vibrating screw dry sorting machine, characterized in that: it comprises a spiral cylinder (2), a dust collection cover (1) arranged on the spiral cylinder (2), a spiral cylinder (2) inner wall There is a spiral groove bed surface (4) with a certain longitudinal inclination angle and transverse inclination angle, high outside and low inside, and the top of the dust collection cover (1) is provided with a guide corresponding to the middle hole surrounded by the spiral groove bed surface (4). Tuyere; the side of the spiral cylinder (2) is provided with an inlet and outlet nozzle (6) for supplying material to the spiral groove bed (4) and discharging light products, and is provided with an inlet and outlet for supplying air to the bottom of the spiral groove bed (4) The air duct, the bottom end of the spiral cylinder (2) is provided with an annular vibration platform (3) with an inner hole in the middle of the spiral cylinder (2), and a discharge chute (5) is provided under the middle of the spiral cylinder (2). (3) A vibrating device is provided on both sides of the bottom, and an elastic support (8) is provided at the bottom of the vibrating device. 2. The vibrating screw dry separator according to claim 1, characterized in that: both the longitudinal inclination angle and the transverse inclination angle of the spiral groove bed surface (4) are about 5 degrees. 3. The vibrating screw dry separator according to claim 1, characterized in that: the vibrating device consists of a V-shaped groove vibrating motor base (10) and a vibrating motor (9) obliquely placed in the V-shaped groove constitute. 4. The vibrating screw dry separator according to claim 1, characterized in that: the elastic support is composed of a foot (8) and a rubber spring (7) arranged on the foot (8).

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