Crushing device for mining

Abstract

The utility model belongs to ore mining field especially ore mining is broken device, aiming at the existing problem that the feeding opening cannot be covered and blocked, part of the broken stone will be bounced outwards, and the staff will be injured, the following scheme is presented, it includes jaw crusher, still includes the support frame fixed in the one side of jaw crusher, the top of support frame is welded with U type frame, two conveying rollers are installed in U type frame through bearing seat, two conveying rollers are connected through annular conveying belt, the material blocking frame welded in the top of jaw crusher, the slope bottom plate that aligns with the feeding opening is arranged in the bottom of material blocking frame, the slope bottom plate and horizontal plane are 10 degree-20 degree angle, in the utility model, the feeding opening is opened and closed dynamically, avoids the ore accumulation and blocks, guarantees the broken operation continuity, utilizes the thread adjusting mechanism of screw and nut, effectively prevents the ore overflow and the conveying deviation, and reduces the manual intervention demand, significantly improves the equipment operation stability and the complex working condition adaptability.

Description

Technical Field

[0001] This utility model relates to the field of ore mining technology, and in particular to an ore crushing device. Background Technology

[0002] Crushing equipment is a key piece of equipment in mining. It uses mechanical force to crush large pieces of ore into suitable particle sizes, which facilitates subsequent beneficiation and grinding operations, improves processing efficiency, reduces transportation and processing costs, and enhances resource utilization.

[0003] Jaw crushers used in existing ore mining generally employ direct feeding for crushing. As the ore is crushed by pressure during the crushing process, the feed opening is not covered or blocked, and some crushed stones will be ejected outwards, which may cause accidental injury to workers. Utility Model Content

[0004] The purpose of this utility model is to solve the problem in the existing technology where the feed inlet is not covered or blocked, and some crushed stones will be ejected outward, which may cause accidental injury to workers. The proposed ore mining method uses a crushing device.

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

[0006] Ore mining employs crushing equipment, including jaw crushers, and also includes:

[0007] A support frame is fixed to one side of the jaw crusher. A U-shaped frame is welded to the top of the support frame. Two conveying rollers are installed inside the U-shaped frame through bearing seats. The two conveying rollers are connected by a ring conveyor belt.

[0008] A baffle frame is welded to the top of the jaw crusher. The bottom of the baffle frame is equipped with a sloping bottom plate aligned with the feed inlet. The sloping bottom plate forms an angle of 10°-20° with the horizontal plane.

[0009] Dynamic sealing mechanism: includes an abutment plate hinged to the side wall of the baffle frame via a rotating shaft. The lower edge of the abutment plate intermittently contacts the eccentric shaft inside the jaw crusher. A U-shaped butt plate is welded to the upper end of the abutment plate. Sliding shafts welded to both sides of the U-shaped butt plate are embedded in the arc-shaped guide groove of the side wall of the baffle frame to form a sliding pair.

[0010] In one possible design, a flow regulation mechanism is also included:

[0011] A mounting bracket is welded to the top of the U-shaped frame. A nut is fixed in the center of the mounting bracket's crossbeam. A fully threaded screw is threaded to the nut. A baffle is connected to the bottom of the screw via a thrust bearing.

[0012] Two telescopic rods are welded to both sides of the mounting frame, and the inner end of the telescopic rod is fixedly connected to the baffle.

[0013] In one possible design, a drive motor is fixedly installed on the top of the support frame, and one of the conveyor roller shafts is connected to the output shaft of the drive motor via a sprocket and a chain to form a transmission connection. The running speed of the conveyor belt is linked to the crushing frequency of the jaw crusher for control.

[0014] In one possible design, a vertical plate is welded to the right side of the baffle frame, with the height of the vertical plate being higher than the upper edge of the conveyor belt, forming a lateral limiting structure for the conveyed ore.

[0015] In one possible design, a wear-resistant rubber layer is provided on one side of the contact plate to reduce noise generated by contact with the eccentric shaft inside the jaw crusher.

[0016] In one possible design, a self-lubricating copper sleeve is fitted into the end of the sliding shaft.

[0017] In this application, ore is fed onto a conveyor belt, and a drive motor is started by a control switch. The output shaft of the drive motor drives two sprockets connected by a chain drive to rotate. One of the sprockets drives two conveyor rollers connected by a conveyor belt to rotate, thereby conveying the ore into the jaw crusher. After being conveyed by the conveyor belt, the ore falls onto the inclined bottom plate and is crushed inside the jaw crusher. Simultaneously, the jaw crusher drives the moving jaw plate to move. When the eccentric shaft rotates eccentrically, it contacts the abutment plate, causing the abutment plate to rotate around the rotating shaft. The top of the abutment plate causes the U-shaped docking plate to rotate, moving the U-shaped docking plate that mates with the inclined bottom plate away from the inclined bottom plate and opening the feed inlet above the jaw crusher. The U-shaped docking plate flips within the chute via a sliding shaft, causing the ore on the inclined bottom plate to fall into the jaw crusher for crushing. When the eccentric wheel moves away from the contact plate, the contact plate flips back to its original position around the rotating shaft under the gravity of the U-shaped docking plate, allowing the U-shaped docking plate to continue forming a squeeze-contact seal with the inclined bottom plate. Before the conveyor belt transports the ore, the screw is manually held and rotated. The screw and the nut in the mounting frame are threaded together, thereby adjusting the height of the bottom baffle of the screw. When adjusting the baffle height, a telescopic rod is used for limiting. By adjusting the height of the baffle, part of the ore is blocked, controlling the amount of ore transported. During the transport process, the U-shaped frame blocks and limits the transported ore on the conveyor belt, preventing the ore from falling to both sides of the conveyor belt.

[0018] Beneficial Effects: In this utility model, the ore crushing device utilizes a U-shaped frame and a baffle frame docking design, combined with the alignment structure of the inclined bottom plate and the jaw crusher feed inlet, forming a dual feeding guarantee mechanism. After being conveyed by the conveyor belt, the ore is precisely introduced into the crushing chamber by the inclined bottom plate. Simultaneously, the intermittent contact design between the contact plate and the eccentric wheel allows the U-shaped docking plate to periodically open and close the cover above the inclined bottom plate during the crushing process. This mechanism not only prevents ore accumulation and blockage but also achieves dynamic feed adjustment through the flipping action of the U-shaped docking plate, ensuring that the amount of ore in the crushing chamber is always within the high-efficiency processing range, significantly improving the continuity and stability of the crushing operation.

[0019] In this invention, the threaded adjustment structure of the screw and nut, combined with the limiting function of the telescopic rod, allows for real-time adjustment of the height of the baffle, forming a dynamic barrier to the ore conveying volume. Operators can precisely control the distance between the baffle and the conveyor belt by rotating the screw, thereby limiting the volume of ore passing through at one time and effectively preventing equipment overload or ore overflow caused by excessive feeding. At the same time, the conveying rollers on both sides of the U-shaped frame are synchronously driven by the conveyor belt, forming a lateral limit on the ore during the conveying process, providing double protection for the controllability and safety of the feeding process.

[0020] In this invention, the opening and closing of the feed inlet is dynamically adjusted to avoid ore accumulation and blockage, ensuring the continuity of crushing operations. The screw and nut thread adjustment mechanism effectively prevents ore overflow and conveying deviation, reduces the need for manual intervention, and significantly improves the stability of equipment operation and adaptability to complex working conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the ore crushing device proposed in this utility model;

[0022] Figure 2 This is a cross-sectional structural schematic diagram of the ore crushing device proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the ore crushing device mounting frame proposed in this utility model.

[0024] In the diagram: 1. Jaw crusher; 2. Material retaining frame; 3. U-shaped frame; 4. Support frame; 5. Drive motor; 6. Vertical plate; 7. Inclined bottom plate; 8. Conveyor belt; 9. Conveyor roller; 10. Sprocket; 11. Chain; 12. Nut; 13. Screw; 14. Mounting frame; 15. Telescopic rod; 16. Baffle; 17. Contact plate; 18. Rotating shaft; 19. U-shaped connecting plate; 20. Sliding shaft; 21. Guide groove. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] In one embodiment: Refer to Figure 1 The ore crushing device proposed in this utility model includes: the main body of the crushing device is a jaw crusher 1, with support frames 4 welded to the four corners of the bottom of the equipment, and a U-shaped frame 3 fixed to the top of each support frame 4 by bolts. The U-shaped frame 3 is formed by welding channel steel, and its open end is connected to the feed inlet at the top of the jaw crusher 1. Inside the U-shaped frame 3, two parallel conveyor rollers 9 are installed through bearing seats, and the surfaces of the two conveyor rollers 9 are covered with an annular conveyor belt 8. The working surface of the conveyor belt 8 is higher than the upper edge of the U-shaped frame 3 to form a conveying channel. A baffle frame 2 is welded to the top of the jaw crusher 1, and a vertical plate 6 is welded to its right side. A sloping bottom plate 7 is welded to the bottom of the frame, and the sloping bottom plate 7 forms a 15° angle connection structure with the feed inlet of the jaw crusher 1.

[0027] Reference Figure 2 Symmetrical mounting holes are made on both sides of the inner wall of the retaining frame 2. A rotating shaft 18 with a sealing ring is embedded in each mounting hole, and an abutment plate 17 is welded between two rotating shafts 18. The lower edge of the abutment plate 17 is in intermittent contact with the eccentric shaft inside the jaw crusher 1. A U-shaped connecting plate 19 is welded to its top, and sliding shafts 20 with a diameter of 20 mm are welded to both sides of the U-shaped connecting plate 19. Arc-shaped guide grooves 21 are made at corresponding positions on the inner walls of both sides of the retaining frame 2. A self-lubricating copper sleeve is embedded at the end of the sliding shaft 20 and forms a sliding pair in the guide groove 21. The curvature of the guide groove 21 matches the rotation trajectory of the eccentric shaft.

[0028] Reference Figure 2 The support leg 4 has a drive motor 5 fixed in the middle by a motor mount. The output shaft of the motor is keyed to the shaft of the right conveyor roller 9, and the two sprockets 10 are connected by a chain 11. The top of the U-shaped frame 3 is welded with an inverted U-shaped mounting bracket 14. The center of the crossbeam of the mounting bracket 14 has a through hole and a nut 12 is welded thereon. The nut 12 has a fully threaded screw 13. The bottom of the screw 13 is connected to a baffle 16 through a thrust bearing. The baffle 16 is made of 10 mm thick polyurethane sheet, and its bottom surface is machined into an arc surface with a diameter of 1000 mm. Two telescopic rods 15 are symmetrically welded to the crossbeams on both sides of the mounting bracket 14. The outer cylinder of the telescopic rod 15 is welded to the mounting bracket 14, and the end of the inner rod is rigidly connected to the baffle 16 by bolts.

[0029] This application can be used in the field of ore mining, or in other fields applicable to this application.

[0030] In another embodiment: Reference Figures 1 to 3The ore crushing device is used in the field of ore mining. During operation, the ore is fed onto the surface of the conveyor belt 8 by the front-end equipment. The drive motor 5 drives the conveyor roller 9 to rotate synchronously through the sprocket and chain transmission mechanism. The conveyor belt 8 transports the ore towards the crusher. The ore is blocked by the vertical plate 6 at the baffle frame 2 and accumulates. When the eccentric shaft rotates to the position of the contact plate 17, the radial thrust generated by the eccentric motion pushes the contact plate 17 to flip upward around the rotating shaft 18. The U-shaped docking plate 19 is lifted accordingly, causing the sliding shaft 20 to move upward along the guide groove 21. The channel above the inclined bottom plate 7 opens, and the ore rolls into the crushing chamber along the slope. After the eccentric shaft disengages, the U-shaped docking plate 19 automatically resets under the action of gravity, forming a sealed fit with the inclined bottom plate 7.

[0031] refer to Figures 1 to 3 The operator can adjust the height of the baffle 16 by rotating the screw 13. When the screw 13 is rotated clockwise, the baffle 16 descends under the guidance of the telescopic rod 15, reducing the distance between its arc-shaped bottom surface and the conveyor belt 8, thus achieving precise control of the volume of ore passing through in a single pass. During the conveying process, the vertical plates on both sides of the U-shaped frame 3 form a width-limiting channel, effectively preventing ore from spilling laterally. This device works in conjunction with the intermittent feeding mechanism driven by the eccentric shaft and the flow control mechanism adjusted by the screw to ensure that the optimal material level is always maintained in the crushing chamber. Compared with traditional equipment, it effectively increases the processing capacity per unit time and greatly reduces the equipment overload downtime rate.

[0032] However, as is well known to those skilled in the art, the working principle and wiring method of the drive motor 5 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

Claims

1. A crushing device for ore mining, comprising a jaw crusher (1), characterized in that, Also includes: A support frame (4) is fixed to one side of the jaw crusher (1). A U-shaped frame (3) is welded to the top of the support frame. Two conveying rollers (9) are installed inside the U-shaped frame through bearing seats. The two conveying rollers are connected by a ring conveyor belt (8). A baffle frame (2) is welded to the top of the jaw crusher (1). A sloping bottom plate (7) aligned with the feed inlet is provided at the bottom of the baffle frame. The sloping bottom plate forms an angle of 10°-20° with the horizontal plane. Dynamic sealing mechanism: includes a contact plate (17) hinged to the side wall of the baffle frame (2) via a rotating shaft (18). The lower edge of the contact plate (17) intermittently contacts the eccentric shaft inside the jaw crusher (1). A U-shaped butt plate (19) is welded to the upper end of the contact plate. The sliding shafts (20) welded on both sides of the U-shaped butt plate are embedded in the arc-shaped guide groove (21) of the side wall of the baffle frame to form a sliding pair.

2. The ore crushing device according to claim 1, characterized in that, It also includes flow regulation mechanisms: The top of the U-shaped frame (3) is welded with a mounting bracket (14), the center of the beam of the mounting bracket (14) is fixed with a nut (12), the threaded screw (13) is threaded with the nut, and the bottom of the screw is connected to a baffle (16) through a thrust bearing; Two telescopic rods (15) are welded to both sides of the mounting bracket (14), and the inner end of the telescopic rod is fixedly connected to the baffle (16).

3. A crushing device for ore mining according to claim 1 or 2, characterized in that, A drive motor (5) is fixedly installed on the top of the support frame (4). One of the conveyor rollers (9) is connected to the output shaft of the drive motor through a sprocket (10) and a chain (11). The running speed of the conveyor belt (8) is linked to the crushing frequency of the jaw crusher (1) for control.

4. The ore crushing device according to claim 3, characterized in that, The material retaining frame (2) has a welded vertical plate (6) on the right side. The height of the vertical plate is higher than the upper edge of the conveyor belt (8), forming a lateral limiting structure for the conveyed ore.

5. The ore crushing device according to claim 4, characterized in that, The abutment plate (17) is provided with a wear-resistant rubber layer on one side to reduce the noise generated by contact with the eccentric shaft inside the jaw crusher (1).

6. The ore crushing device according to claim 5, characterized in that, A self-lubricating copper sleeve is fitted at the end of the sliding shaft (20).

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