Single-shaft two-way spiral material distribution device for mine screening and crushing process system

Abstract

The invention belongs to the technical field of mining mechanical equipment, and particularly relates to a single-shaft two-way spiral material distribution device for a mine screening and crushing process system, which comprises a blanking pipe 19, a vibrating screen 20 arranged below a discharge port of the blanking pipe 19, and a single-shaft two-way spiral material distribution device arranged between the lower part of the discharge port of the blanking pipe 19 and the vibrating screen 20. The single-shaft two-way spiral material distribution device comprises a box body 1, a feeding port 21 is formed in the top of the box body 1, a discharging port 22 is formed in the bottom of the box body 1, a main shaft 2 is rotationally arranged in the box body 1, two sets of spiral blades opposite in rotation direction are fixedly connected to the main shaft 2, the ends of the two sets of spiral blades abut against and are fixed to form a peak-shaped structure, and the peak-shaped structure extends out in the rotation direction of the main shaft 2. A material receiving plate 9 is arranged on one side of the main shaft 2 and fixedly connected with the box body 1, and when the spiral blades are close to the material receiving plate 9, the rotating direction of the spiral blades is opposite to the material falling direction.

Description

Technical Field

[0001] The invention belongs to the technical field of mining mechanical equipment, and in particular relates to a single-axis bidirectional spiral material distribution device for a mining screening and crushing process system. Background Art

[0002] The mining screening and crushing process system is a process system used to crush and grade materials, and screen and crush them according to the required particle size. The process system is mainly composed of a vibrating screen and a crusher. When the material passes through the vibrating screen, the material that meets the particle size requirements flows directly out from the material outlet under the screen, and the material that does not meet the particle size requirements enters the crusher through the vibrating screen bypass, and reaches the particle size requirements after crushing. In the current production process, the material to be crushed falls directly onto the vibrating screen through the drop pipe. Since the drop pipe has a gathering effect on the material flow, the material accumulates and concentrates when entering the vibrating screen, and cannot be evenly spread. When the material drop is large, the high-speed material flow is very likely to cause impact wear on the equipment, and the induced wind generated will aggravate the generation of dust, which brings great trouble to the enterprise's production safety and occupational health management. At present, the main solution is to set a buffer drum between the drop pipe and the vibrating screen to buffer the material flow. When the viscosity of the material is high, it is very easy for the material to stick or even get blocked on the buffer drum. At this time, it is necessary to stop the machine for manual cleaning, which is time-consuming and unsafe. In addition, a commonly used spiral distributor for paving machines is installed in the paving room behind the paving machine. Its function is to transport the hot mixture in the middle of the paving room horizontally to the full width of the paving machine. Its main structure consists of two screws with large pitch and large diameter blades. The left and right spiral shafts are fixed on the frame and driven by the left and right transmission chains or bevel gears respectively. The left and right sides form independent systems, which can work simultaneously or separately. The left and right blades rotate in opposite directions to transport the mixture from the middle to both sides. The blades are made of wear-resistant materials or surface hardening treatment. However, the spiral distributor for paving machines is mainly used for paving stabilization layers and asphalt concrete. It is a special equipment for road construction. It has a complex structure and high transmission requirements, which directly affects the quality of road construction. For the mining screening and crushing process system, the flatness of the cloth is not high, but it is necessary to meet the requirements that the material is evenly spread and the speed is effectively controlled before entering the vibrating screen, and material blockage should be avoided. In addition, considering the poor working environment of mining machinery, with high vibration, noise and dust, the equipment structure is required to be as simple as possible, easy to manufacture and maintain, with high reliability and good economy. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a single-axis bidirectional spiral material distribution device for a mine screening and crushing process system.

[0004] The objective of the present invention is achieved in the following manner: a uniaxial bidirectional spiral material distribution device for a mine screening and crushing process system comprises a drop pipe 19, a vibrating screen 20 is arranged below the discharge port of the drop pipe 19, a uniaxial bidirectional spiral material distribution device is arranged below the discharge port of the drop pipe 19 and between the vibrating screen 20, the uniaxial bidirectional spiral material distribution device comprises a box body 1, a feed port 21 is arranged at the top of the box body 1, a discharge port 22 is arranged at the bottom of the box body 1, a main shaft 2 is rotatably arranged in the box body 1, two groups of spiral blades with opposite rotation directions are fixedly connected to the main shaft 2, the ends of the two groups of spiral blades are abutted and fixed to form a peak-shaped structure, and the peak-shaped structure extends toward the rotation direction of the main shaft 2; a receiving plate 9 is arranged on one side of the main shaft 2, the receiving plate 9 is fixedly connected to the box body 1, and when the spiral blades are close to the receiving plate 9, the rotation direction of the spiral blades is opposite to the falling direction of the material.

[0005] Furthermore, each set of spiral blades is provided with at least one set of radial grooves distributed along the axial direction, and the width of the grooves is 20 to 80 mm; when each set of spiral blades has two or more sets of grooves, the width of the grooves increases gradually from the middle of the main shaft 2 to the end.

[0006] Furthermore, the number of lines of each set of spiral blades is greater than or equal to two.

[0007] Furthermore, the receiving plate 9 is tilted, and the angle between the receiving plate 9 and the horizontal plane is 45° to 70°.

[0008] Furthermore, a flange 3 is fixedly connected to both sides of the box body 1, the flange 3 is fixedly connected to the bearing seat 4, a bearing is arranged in the bearing seat 4, the bearing seat 4 is fixedly connected to the outer ring of the bearing, and the inner ring of the bearing is fixedly connected to the end of the main shaft 2; the outer end of the bearing seat 4 at one end of the main shaft 2 is fixedly connected to the second bearing end cover 24, and the outer end of the bearing seat 4 at the other end of the main shaft 2 is fixedly connected to the first bearing end cover 8, the main shaft 2 passes through the first bearing end cover 8 and is fixedly connected to one end of the coupling 6, and the other end of the coupling 6 is fixedly connected to the output end of the motor 7.

[0009] Furthermore, a first oil groove sealing gasket 14 is arranged between the first bearing end cover 8 and the main shaft 2, and a second oil groove sealing gasket 15 is arranged between the bearing seat 4 and the main shaft 2. The first oil groove sealing gasket 14 and the second oil groove sealing gasket 15 are both fixed to the main shaft 2 by set screws.

[0010] Furthermore, the bearing is a double-row cylindrical roller bearing 5 .

[0011] Furthermore, an observation window 23 is provided on the box body 1 on the other side opposite to the receiving plate 9. There are two observation windows 23, and the two observation windows 23 are respectively arranged opposite to the two groups of spiral blades.

[0012] Compared with the prior art, the present invention designs two sections of spirals with opposite rotation directions on the main shaft to realize the function of conveying the cloth from the middle to both sides. The structure is simple, and only one transmission chain is required, which is easy to manufacture and maintain, has high reliability and good economy, and can realize efficient bidirectional dispersion of a large amount of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an installation schematic diagram of the present invention.

[0014] Figure 2 This is the assembly diagram of a single-axis bidirectional spiral material distribution device for mining screening and crushing equipment. Figure 2 .1 is the main view, Figure 2 .2 is the left view.

[0015] Figure 3 This is a partial enlarged view of the left side bearing seat and box assembly.

[0016] Figure 4 This is a partial enlarged view of the right side bearing seat and box assembly.

[0017] Figure 5 It is a schematic diagram of the bidirectional spiral spindle structure.

[0018] Figure 6 It is an axial view of a bidirectional spiral spindle.

[0019] Among them, 1-box; 2-bidirectional spiral spindle; 3-flange; 4-bearing seat; 5-double-row cylindrical roller bearing; 6-coupling; 7-motor; 8-bearing end cover; 9-stainless steel liner; 10, 11-right blade; 12-screw; 13-screw; 14, 15-oil groove gasket; 16-fastening screw; 17, 18-left blade; 19-dropping pipe; 20-vibrating screen; 21-feeding port; 22-discharging port; 23-observation window; 24-screw end cover; 25-screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the present invention, unless otherwise clearly stipulated and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] As attached Figure 1-2 As shown, a single-axis bidirectional spiral material distribution device for a mine screening and crushing process system comprises a drop pipe 19, and a vibrating screen 20 is arranged below the discharge port of the drop pipe 19, characterized in that a single-axis bidirectional spiral material distribution device is arranged below the discharge port of the drop pipe 19 and between the vibrating screen 20, and the single-axis bidirectional spiral material distribution device comprises a box body 1, a feed port 21 is arranged on the top of the box body 1, and a discharge port 22 is arranged on the bottom of the box body 1, and preferably a large overall opening is formed at the bottom of the box body 1 as the discharge port 22, a main shaft 2 is rotatably arranged in the box body 1, and two groups of spiral blades with opposite rotation directions are fixedly connected to the main shaft 2, and the ends of the two groups of spiral blades are abutted and fixed to form a peak-shaped structure, and the peak-shaped structure extends toward the rotation direction of the main shaft 2; a receiving plate 9 is arranged on one side of the main shaft 2, and the receiving plate 9 is fixedly connected to the box body 1, and when the spiral blades are close to the receiving plate 9, the rotation direction of the spiral blades is opposite to the falling direction of the materials. In detail, the description refers to, based on Figure 2 .2. The material falls on the receiving plate 9 and falls further. At this time, the spiral blade close to the receiving plate 9 rotates upward here, that is, the main shaft 2 rotates clockwise, and the peak-shaped structure extends from the bottom to the top here, so that the fallen material falls on the peak-shaped structure and slides to both sides, and is transported to both sides through two groups of spiral blades respectively.

[0023] Furthermore, each set of spiral blades is provided with at least one set of radial grooves distributed along the axial direction, the depth of the grooves preferably extends from the outer edge of the spiral blades to the surface of the main shaft 2, and the width of the grooves is 20-80 mm. When each set of spiral blades has a set of grooves, the width of the grooves is preferably 50 mm, that is, Figure 5-6 As shown in the figure, a slit with a width of about 50 mm is processed on each spiral blade 10, 11, 17, 18, and the continuous spiral blade is divided into two sections. After the material enters the distributor from the feed port 21, part of the material falls directly from the slit to the vibrating screen 20, and the other part of the material falls on the spiral blades and is transported to both sides by the blades to achieve segmented distribution; when each set of spiral blades has two or more sets of grooves, the width of the groove increases from the middle of the main shaft 2 to the end.

[0024] Furthermore, the number of lines of each set of spiral blades is greater than or equal to two. As shown in the figure, the left blades 10 and 11 are double-line spirals, and the right blades 17 and 18 are double-line spirals, and the left and right blades have opposite rotation directions.

[0025] Furthermore, the receiving plate 9 is tilted, and the angle between the receiving plate 9 and the horizontal plane is 45°~70°. Preferably, the slope is less than the conventional design angle of 60° to facilitate material flow.

[0026] Further, such as Figure 2-4 As shown in , holes are respectively arranged on both sides of the housing 1, flanges 3 are installed in the holes, evenly distributed threaded holes are arranged on the flange of the flange 3, the flange 3 is connected to the housing 1 by screws 12, evenly distributed threaded holes are designed on the flange 3, the bearing seat 4 is connected to the flange 3 by screws 13, so that the flange 3 is fixedly connected to the bearing seat 4, a bearing is arranged in the bearing seat 4, the bearing seat 4 is fixedly connected to the outer ring of the bearing, and the inner ring of the bearing is fixedly connected to the end of the main shaft 2; the outer end of the bearing seat 4 at one end of the main shaft 2 is fixedly connected to the second bearing end cover 24, so that the bearing seat 4 is closed, and the outer end of the bearing seat 4 at the other end of the main shaft 2 is fixedly connected to the first bearing end cover 8, the main shaft 2 passes through the first bearing end cover 8 and is fixedly connected to one end of the coupling 6, and the other end of the coupling 6 is fixedly connected to the output end of the motor 7, and the main shaft 2 is supported by a double-row cylindrical roller bearing 5.

[0027] Furthermore, a first oil groove sealing gasket 14 is arranged between the first bearing end cover 8 and the main shaft 2, and a second oil groove sealing gasket 15 is arranged between the bearing seat 4 and the main shaft 2. The first oil groove sealing gasket 14 and the second oil groove sealing gasket 15 are both fixed to the main shaft 2 by set screws.

[0028] Furthermore, an observation window 23 is provided on the box body 1 on the other side opposite to the receiving plate 9. There are two observation windows 23, and the two observation windows 23 are respectively arranged opposite to the two groups of spiral blades.

[0029] The main shaft 2 of the spiral feeder rotates at a low speed driven by the motor 7. The force exerted by the spiral surface on the material includes not only a forward thrust along the spiral axis, but also a tangential force in the circumferential direction. The tangential force is the force that causes the material to roll. During the uniform rotation of the spiral blades, the material is continuously pushed upward along the angular velocity direction to a certain position and then collapses downward, while the material is pushed to move to both sides along the axial direction of the spiral line. The friction and the weight of the material generate a force that causes the material to slide down along the spiral surface, balancing the circumferential tangential force of the spiral surface. Under the action of the forward thrust along the axial direction, the materials on the spiral blades 10, 11 and blades 17, 18 move along the axes of the reverse spiral lines on both sides, respectively, realizing the function of bidirectional dispersion of the single-axis spiral feeder and avoiding the phenomenon of material piling and sticking in the middle of the main shaft 2.

[0030] Compared with the prior art, the present invention can achieve efficient bidirectional dispersion of a large amount of materials and avoid material accumulation or adhesion. In addition, considering that the existing paver distributor adopts a double-axis spiral distribution device, the structure is complex and the transmission requirements are high, the device adopts a single-axis bidirectional spiral, and two sections of spirals with opposite rotation directions are designed on the main shaft to achieve the function of conveying the material from the middle to both sides. The structure is simple, and only one transmission chain is required, which is easy to manufacture and maintain, with high reliability and good economy.

[0031] The present invention can realize the closure of the material distributing device, and the dust of the equipment will not overflow during the material distributing process, thereby effectively reducing dust and improving the on-site operating environment.

[0032] The present invention can be directly arranged above the vibrating screen without the need for a supporting structure from the ground, and the discharging direction can be selected according to the arrangement within a 360-degree range, is not affected by the system arrangement, and has good applicability.

[0033] The invention has high working efficiency, and the maximum discharge of a single machine can reach 500 tons / hour. It is also equipped with a frequency converter, which can adjust the motor speed according to the specific operating conditions on site and the characteristics of the materials, and has good adaptability. When the coal is sticky and wet or the conveying amount of the previous material is small, the speed is appropriately reduced; when the coal is dry and has high fluidity or the conveying amount of the previous material is large, the speed is appropriately increased.

[0034] The present invention can use a vibration motor, and can set interval vibration or manual control cleaning to prevent material jamming. When there are large pieces of material on the distributing machine and there is a tendency for jamming, the main shaft of the distributing machine can be set to reverse. After the material is broken by itself or manually cleaned, it can run normally.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A single-axis bidirectional spiral material distribution device for a mine screening and crushing process system, comprising a material drop pipe (19), a vibrating screen (20) being arranged below a material outlet of the material drop pipe (19), characterized in that: A single-axis bidirectional spiral material distribution device is arranged between the lower portion of the discharge port of the drop pipe (19) and the vibrating screen (20), the single-axis bidirectional spiral material distribution device comprising a box body (1), a feed port (21) being arranged at the top of the box body (1), a discharge port (22) being arranged at the bottom of the box body (1), a main shaft (2) being rotatably arranged in the box body (1), two groups of spiral blades with opposite rotation directions being fixedly connected to the main shaft (2), the ends of the two groups of spiral blades being abutted and fixed to form a peak-shaped structure, and the peak-shaped structure extending toward the rotation direction of the main shaft (2); a material receiving plate (9) being arranged at one side of the main shaft (2), the material receiving plate (9) being fixedly connected to the box body (1), and when the spiral blades are close to the material receiving plate (9), the rotation direction of the spiral blades is opposite to the falling direction of the material.

2. A single-axis bidirectional spiral material distribution device for a mine screening and crushing process system as claimed in claim 1, characterized in that: Each set of spiral blades is provided with at least one set of radial grooves distributed along the axial direction, and the width of the grooves is 20 to 80 mm; when each set of spiral blades has two or more sets of grooves, the width of the grooves increases from the middle of the main shaft (2) to the end.

3. The single-axis bidirectional spiral material distribution device for a mine screening and crushing process system according to claim 1, characterized in that: The number of lines of each set of spiral blades is greater than or equal to two.

4. A single-axis bidirectional spiral material distribution device for a mine screening and crushing process system as claimed in claim 1, characterized in that: The material receiving plate (9) is arranged tilted, and the angle between the material receiving plate (9) and the horizontal plane is 45° to 70°.

5. A single-axis bidirectional spiral material distribution device for a mine screening and crushing process system according to any one of claims 1 to 4, characterized in that: A flange plate (3) is fixedly connected to each of the two sides of the housing (1), the flange plate (3) is fixedly connected to a bearing seat (4), a bearing is arranged inside the bearing seat (4), the bearing seat (4) is fixedly connected to an outer ring of the bearing, and the inner ring of the bearing is fixedly connected to an end of the main shaft (2); the outer end of the bearing seat (4) at one end of the main shaft (2) is fixedly connected to a second bearing end cover (24), the outer end of the bearing seat (4) at the other end of the main shaft (2) is fixedly connected to a first bearing end cover (8), the main shaft (2) passes through the first bearing end cover (8) and is fixedly connected to one end of a coupling (6), and the other end of the coupling (6) is fixedly connected to an output end of a motor (7).

6. A single-axis bidirectional spiral material distribution device for a mine screening and crushing process system as claimed in claim 5, characterized in that: A first oil groove sealing gasket (14) is arranged between the first bearing end cover (8) and the main shaft (2), and a second oil groove sealing gasket (15) is arranged between the bearing seat (4) and the main shaft (2). The first oil groove sealing gasket (14) and the second oil groove sealing gasket (15) are both fixed to the main shaft (2) by means of set screws.

7. A single-axis bidirectional spiral material distribution device for a mine screening and crushing process system as claimed in claim 5, characterized in that: The bearing is a double-row cylindrical roller bearing (5).

8. A single-axis bidirectional spiral material distribution device for a mine screening and crushing process system as claimed in claim 5, characterized in that: An observation window (23) is provided on the box body (1) on the other side opposite to the receiving plate (9). There are two observation windows (23), and the two observation windows (23) are respectively arranged opposite to the two groups of spiral blades.

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