Front anti-blocking screening system of crusher

Abstract

The front anti-blocking screening system comprises a hopper and an axial flow conveying frame, the axial flow conveying frame is installed below the hopper, a spiral driving structure matched with the axial flow conveying frame is arranged on one side of the axial flow conveying frame, and a double-spiral assembly matched with the spiral driving structure is arranged in the axial flow conveying frame. And a feeding hole matched with the axial flow conveying frame is formed in the top of the hopper. Through the reverse rotation design of the double spiral shafts and the combination of the inclined structure of the flow guide groove, the system can forcibly extrude and crush ores in the conveying process, meanwhile, the screening function is achieved, it is ensured that the particle size of the ores entering a subsequent crusher meets the requirement (0.5-0.9 m), the load of the crusher is remarkably reduced, the overall structure of the material opening and the axial flow conveying frame is compact, and the cost is low. The device is convenient to install and maintain and suitable for various mine operation environments.

Description

Technical Field

[0001] This utility model relates to the field of crusher technology, and in particular to a pre-clog anti-jamming screening system for crushers. Background Technology

[0002] During mining and ore crushing, the particle size distribution of blasted ore is uneven, often with large pieces or particles exceeding the standard size. Before entering the crusher, the ore needs to be transported to a screening and crushing yard to be crushed to a diameter of 0.5 meters to 0.9 meters before being transported to the crushing station for further crushing. At the same time, the crusher may experience jamming due to excessive feeding. These large pieces of ore entering the crusher directly can easily cause equipment jamming, blockage, or even damage, seriously affecting production efficiency.

[0003] Existing pretreatment methods typically employ manual screening or secondary crushing, but these methods suffer from low efficiency, high cost, and high labor intensity. Therefore, it is urgent to address the issues of particle size screening and overfeeding jamming in mixed ores before they enter the crusher. Utility Model Content

[0004] The purpose of this utility model is to address the deficiencies in the existing technology by proposing a pre-loading anti-jamming screening system for crushers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pre-loading anti-jamming screening system for a crusher includes a hopper and an axial flow conveyor frame. The axial flow conveyor frame is installed below the hopper. A screw drive structure is provided on one side of the axial flow conveyor frame to cooperate with it. A double screw assembly is provided inside the axial flow conveyor frame to cooperate with the screw drive structure. A feed inlet is provided at the top of the hopper to cooperate with the axial flow conveyor frame.

[0007] Furthermore, the axial flow conveyor frame has a rectangular structure and an internal guide groove. The end of the axial flow conveyor frame away from the spiral drive structure has a discharge port that communicates with the guide groove. The double spiral assembly is installed at the intersection of the guide groove and the hopper.

[0008] Furthermore, the double helix assembly includes two helical shafts, a first helix and a second helix, which cooperate with the helical drive structure. Both the first helix and the second helix are provided with helical blades.

[0009] Furthermore, the helical blades on the helical shaft are right-handed, and the helical shaft rotates clockwise.

[0010] The spiral blades on the second spiral shaft are designed to rotate counterclockwise.

[0011] Furthermore, the lead angle of the spiral blades of the first spiral shaft and the second spiral shaft is -°, and the axial distance between the first spiral shaft and the second spiral shaft is 1.2-1.5 times the shaft diameter, ensuring that the material is forcibly squeezed and directionally moved towards the discharge side when rotating in the opposite direction.

[0012] Furthermore, the cross-section of the guide channel is V-shaped or U-shaped, with an inclination angle of 5-15°, and the guide channel is provided with a wear-resistant liner to accelerate the flow of materials in a specified direction.

[0013] Furthermore, the spiral drive structure includes a drive mounting frame, on which a drive motor is provided to cooperate with the first spiral shaft and the second spiral shaft. The number of drive motors is one. Alternatively, two drive motors can be used to drive the first spiral shaft and the second spiral shaft to rotate respectively, thereby achieving forward and reverse rotation. If only one drive motor is used, it is a dual-output shaft reduction motor that synchronously drives the two spiral shafts to rotate in opposite directions through a gearbox.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] By employing a reverse rotation design of the double helical shafts, combined with the inclined structure of the guide trough, the system can forcibly compress and crush the ore during the conveying process, while simultaneously achieving a screening function. This ensures that the ore particle size entering the subsequent crusher meets the requirements (0.5 m to 0.9 m), significantly reducing the crusher load. Furthermore, the rotation direction of the double helical shafts and the direction of rotation (right-hand + clockwise, left-hand + counterclockwise) create a superimposed axial thrust effect, forcibly pushing the material towards the discharge port within the guide trough. This avoids jamming caused by material accumulation or excessively large particle size, ensuring smooth material flow. Moreover, the overall structure of the discharge port and axial flow conveyor frame is compact, facilitating installation and maintenance, and making it suitable for various mining operating environments. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] Figure 1 This is one of the overall structural diagrams of the pre-loading anti-jamming screening system for crushers proposed in this utility model;

[0018] Figure 2 This is the second schematic diagram of the overall structure of the pre-loading anti-jamming screening system for the crusher proposed in this utility model;

[0019] Figure 3 This is a top view of the pre-loading anti-jamming screening system for crushers proposed in this utility model.

[0020] In the diagram: 100, hopper; 101, feed inlet; 200, axial flow conveyor frame; 201, guide channel; 202, discharge outlet; 300, screw drive structure; 301, mounting frame; 400, double screw assembly; 401, screw shaft one; 402, screw shaft two; 403, screw blade. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example 1: Refer to Figure 1-3 The pre-clamping anti-jamming screening system for the crusher includes a hopper 100 and an axial flow conveyor frame 200. The axial flow conveyor frame 200 is installed below the hopper 100. A screw drive structure 300 is provided on one side of the axial flow conveyor frame 200 to cooperate with it. A double helix assembly 400, cooperating with the screw drive structure 300, is located inside the axial flow conveyor frame 200. A feed inlet 101, cooperating with the axial flow conveyor frame 201, is provided at the top of the hopper 100 to receive the blasted ore. After entering the system through the feed inlet 101 of the hopper 100, the ore falls into the axial flow conveyor frame. The double helix assembly 400 is driven by the screw drive structure 300 to rotate in opposite directions, performing preliminary compression and crushing of the ore, while simultaneously pushing the material directionally towards the discharge side to avoid jamming problems caused by excessively large particle sizes or accumulation.

[0024] The axial flow conveyor 200 has a rectangular structure and an internal guide groove 201. The end of the axial flow conveyor 200 away from the spiral drive structure 300 has a discharge port 202 that communicates with the guide groove 201. The double spiral assembly 400 is installed at the intersection of the guide groove 201 and the hopper 100.

[0025] The double-helix assembly 400 includes two helical shafts, a first helical shaft 401 and a second helical shaft 402, which cooperate with the helical drive structure 300. Both helical shafts 401 and 402 are equipped with helical blades 403. As can be seen from the above design, the guide channel 201 serves as a material flow channel. Through the counter-rotation of the two helical shafts, with helical shaft 401 rotating clockwise and helical shaft 402 rotating counter-clockwise, the ore is forcibly crushed and squeezed within the guide channel 201. The rotation direction of the two helical shafts matches the rotation direction of the helical blades 403, causing the material to be crushed under shear force between the shafts and concentratedly conveyed along the guide channel 201 to the discharge port 202, forming a continuous screening and anti-clogging mechanism.

[0026] The spiral blades 403 on the spiral shaft 401 are right-handed, and the spiral shaft 401 rotates clockwise.

[0027] The spiral blades 403 on the spiral shaft 402 are designed to rotate counterclockwise.

[0028] The lead angle of the spiral blades 403 of the first spiral shaft 401 and the second spiral shaft 402 is 20-45°, and the axial distance between the first spiral shaft 401 and the second spiral shaft 402 is 1.2-1.5 times the shaft diameter. This ensures that the material is forcibly squeezed and directionally moved towards the discharge side when rotating in the opposite direction. It is not difficult to see from the above design that the design of the rotation direction of the double spiral shaft (right-hand + clockwise, left-hand + counterclockwise) forms an axial thrust superposition effect, which forces the material to be pushed to the same side in the guide channel 201. The limitation of the lead angle and the axial distance ensures that the material is fully squeezed and crushed between the spiral blades 403, while avoiding the decrease in conveying efficiency caused by excessively large distances or the jamming caused by excessively small distances.

[0029] The cross-section of the guide channel 201 is V-shaped or U-shaped, with an inclination angle of 5-15°, and the guide channel 201 is provided with a wear-resistant liner to accelerate the flow of materials in a specified direction.

[0030] Example 2: Based on Example 1, the spiral drive structure 300 includes a drive mounting frame 301. The drive mounting frame 301 is equipped with drive motors that cooperate with the spiral shaft 401 and the spiral shaft 402. The number of drive motors is 1-2. Two drive motors are used to drive the spiral shaft 401 and spiral shaft 402 to rotate respectively, achieving forward and reverse rotation. If only one drive motor is used, a dual-output shaft reduction motor is employed, which synchronously drives the two spiral shafts to rotate in opposite directions via a gearbox. From the above design, it is clear that the inclination angle of the guide channel 201, in conjunction with the wear-resistant liner, accelerates the flow of material towards the discharge port 202, reducing frictional loss. The drive structure can be configured in single / dual motor mode according to requirements: when the dual motors drive independently, the speed of the two spiral shafts can be flexibly adjusted to handle different material hardness; when the single motor drives synchronously via a gearbox, it ensures the synchronicity and torque stability of the reverse rotation, further reducing the risk of jamming.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pre-crusher anti-jamming screening system, characterized in that, It includes a hopper (100) and an axial flow conveyor frame (200). The axial flow conveyor frame (200) is installed below the hopper (100). A spiral drive structure (300) is provided on one side of the axial flow conveyor frame (200) to cooperate with it. A double spiral assembly (400) is provided inside the axial flow conveyor frame (200) to cooperate with the spiral drive structure (300). A feed inlet (101) is opened on the top of the hopper (100) to cooperate with the axial flow conveyor frame (200).

2. The pre-crusher anti-jamming screening system of claim 1, wherein, The axial flow conveyor (200) has a rectangular structure and an internal guide groove (201). The end of the axial flow conveyor (200) away from the spiral drive structure (300) has a discharge port (202) that communicates with the guide groove (201). The double spiral assembly (400) is installed at the intersection of the guide groove (201) and the hopper (100).

3. The pre-crusher anti-jamming screening system of claim 2, wherein, The double helix assembly (400) includes two helical shafts, a first helix (401) and a second helix (402), which cooperate with the helical drive structure (300). Both the first helix (401) and the second helix (402) are provided with helical blades (403).

4. The pre-crusher anti-jamming screening system of claim 3, wherein, The spiral blades (403) on the spiral shaft (401) are right-handed, and the spiral shaft (401) rotates clockwise. The spiral blades (403) on the spiral shaft (402) are designed to rotate counterclockwise.

5. The pre-crusher anti-jamming screening system of claim 4, wherein, The lead angle of the helical blades (403) of the first helical shaft (401) and the second helical shaft (402) is 20-45°, and the axial distance between the first helical shaft (401) and the second helical shaft (402) is 1.2-1.5 times the shaft diameter.

6. The pre-crusher anti-jamming screening system of claim 5, wherein, The cross-section of the guide channel (201) is V-shaped or U-shaped, and its inclination angle is 5-15°.

7. The pre-crusher anti-jamming screening system of claim 6, wherein, The spiral drive structure (300) includes a drive mounting bracket (301), on which a drive motor is provided to cooperate with the first spiral shaft (401) and the second spiral shaft (402), and the number of the drive motors is one or two.

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