A crushing and screening device for safe production of an open-pit mine
By introducing dust suction pipes and detachable sealing connection plates into the crushing and screening equipment, the problem of inconvenient maintenance caused by dust overflow has been solved, achieving the effect of dust control and convenient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 莱州市应急保障服务中心
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-14
AI Technical Summary
Existing crushing and screening equipment makes it inconvenient to inspect, clean, and maintain the screens in order to prevent dust from spilling out, thus increasing the difficulty of maintenance.
A crushing and screening device with a dust suction pipe and a sealing connection plate was designed. The dust is sucked away through the dust suction pipe, and the screen can be easily inspected and maintained through the detachable sealing connection plate.
It achieves effective dust control, reduces dust pollution to the environment and the health impact on operators, and simplifies the inspection and maintenance process of the screen.
Smart Images
Figure CN224486768U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of ore crushing and screening technology, specifically a crushing and screening equipment for safe production in open-pit mines. Background Technology
[0002] In the production process of open-pit mines, crushing and screening equipment plays a crucial role. These devices are mainly used to crush and screen the mined rocks to separate them into ores of different particle sizes. Crushing equipment typically includes jaw crushers, impact crushers, and cone crushers. These devices can effectively process rocks of different hardness and types, ensuring that the ore reaches the required particle size and quality in the primary processing after mining. Screening equipment, through forms such as vibrating screens and rotary screens, classifies the crushed ore, separating the qualified finished ore from the unqualified materials.
[0003] For example, utility model patent CN217940423U discloses a crushing and screening device, which relates to the field of screening equipment technology. It includes a shock-absorbing component and a crushing mechanism. A bolt-assembled crushing and screening structure is provided on the upper part of one end of the shock-absorbing component, and a bolt-assembled crushing mechanism is provided on the upper part of the other end of the shock-absorbing component. This utility model outputs power through a cylinder operated by a support platform at one end of the crushing mechanism, so that the output end of the cylinder drives the bridge box to move downward, aligning the input port with the opening on the side of the crushing and screening structure. This allows the raw material to still be input into the crushing mechanism through the bridge box under the output power of the vibration motor after crushing and screening. The electric motor, in conjunction with the meshing gear set, drives the staggered crushing tooth set to effectively crush the raw material, thereby improving the utilization efficiency of the raw material and reducing space waste.
[0004] However, in actual use, it was found that in the process of using crushing and screening equipment, in order to prevent dust generated during screening operations from overflowing and polluting the environment and affecting the health of operators, existing equipment mostly adopts the method of installing a closed shell on the outside of the screen to achieve the dustproof effect. However, the screen is built into the shell, which makes the daily inspection, cleaning and maintenance of the screen extremely inconvenient. It often requires disassembling the shell or performing complicated operations to access the screen, which increases the difficulty of maintenance. Therefore, a crushing and screening equipment for safe production in open-pit mines is provided. Utility Model Content
[0005] The purpose of this application is to provide a crushing and screening device for safe production in open-pit mines in order to solve the problems mentioned above.
[0006] The technical solution adopted in this application is as follows: A crushing and screening equipment for safe production in open-pit mines includes a screening box. A crushing equipment shell is fixedly installed on the top surface of the screening box. An L-shaped mounting plate is provided inside the screening box. Multiple mounting horizontal plates are evenly arrayed on the inner sidewall of the L-shaped mounting plate, and an inclined screen plate is provided on the top surface of each of the multiple mounting horizontal plates. A limiting rod is movably inserted through the top surface of the mounting horizontal plate. The top end of the limiting rod is fixed to the bottom surface of the inclined screen plate. A spring is provided on the outer surface of the limiting rod. The top end of the spring is fixed to the bottom surface of the inclined screen plate, and the bottom end of the spring is fixed to the top surface of the mounting horizontal plate. A vibrating screening mechanism connected to the inclined screen plate is provided on one side of the L-shaped mounting plate. A sealing connecting plate is fixedly installed on the side of the L-shaped mounting plate away from the screening box. Multiple threaded holes are opened on the left side of the screening box near the corner. Multiple locking bolts corresponding to the threaded holes are movably inserted through one side of the sealing connecting plate. One end of the locking bolt is threaded into the inside of the threaded hole.
[0007] In a preferred embodiment, the vibrating screening mechanism includes a main drive shaft, an eccentric wheel, an arc-shaped protrusion, a drive gear, a fixed plate, a motor, and a drive wheel. The main drive shaft is rotatably connected to one side of the L-shaped mounting plate, located on the bottom surface of the inclined screen plate. An eccentric wheel is fixedly mounted on the outer surface of the main drive shaft near its center. An arc-shaped protrusion corresponding to the eccentric wheel is fixedly mounted on the bottom surface of the inclined screen plate. The left end of the main drive shaft passes through one side of a sealing connecting plate. A drive gear is fixedly mounted on the outer surface of the main drive shaft near its left end. A fixed plate is fixedly mounted on one side of the sealing connecting plate. A motor is fixedly mounted on one side of the fixed plate. A drive wheel is fixedly mounted on the drive end of the motor, and the drive wheel meshes with the drive gear.
[0008] In a preferred embodiment, T-shaped connecting blocks are fixedly installed on the opposite sides of the plurality of mounting horizontal plates. The inner sidewall of the screening box is symmetrically provided with a plurality of T-shaped grooves corresponding to the T-shaped connecting blocks. The T-shaped connecting blocks are inserted into the interior of the T-shaped grooves. A sealing gasket is provided inside the T-shaped grooves. An arc-shaped transition surface is provided at the end of the T-shaped connecting block near the T-shaped groove.
[0009] In a preferred embodiment, the screening box has multiple discharge holes on its front side, a baffle shell is fixedly installed on the front side of the screening box, and multiple inclined guide plates are fixedly installed inside the baffle shell.
[0010] In a preferred embodiment, a sealing strip is fixedly installed on the side of the L-shaped mounting plate, and a universal wheel with brake is rotatably connected to the bottom surface of the L-shaped mounting plate near the corner.
[0011] In a preferred embodiment, two dust suction pipes are fixedly installed on the top surface of the screening box, and the ends of the two dust suction pipes away from the screening box are connected to an external dust suction pump.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:
[0013] 1. In this application, due to the adoption of the above-mentioned scheme, the vibrating screening mechanism inside the L-shaped mounting plate operates under normal conditions. With the guiding action of the limit rod and the buffering action of the spring, the inclined screen plate generates stable vibration. During the vibration process, ores of different particle sizes are stratified on the inclined screen plate. Fine particles of ore fall through the screen holes and are further screened by the inclined screen plate below. Finally, they are discharged through the corresponding discharge hole on the front side of the screening box, thereby achieving multi-stage precise screening of the ore. When it is necessary to inspect, clean, or replace the inclined screen plate, the operator can unscrew the locking bolts on the sealing connection plate to release the L-shaped mounting plate from the screening box. The L-shaped mounting plate can then be pulled out of the screening box as a whole using the universal casters with brakes on the bottom surface of the L-shaped mounting plate. This allows for the inspection and maintenance of multiple inclined screen plates and the vibrating screening mechanism. The operation is convenient and reduces the difficulty of screen plate maintenance. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this application;
[0015] Figure 2 This is a schematic diagram of the L-shaped mounting plate in this application before it is installed;
[0016] Figure 3 This is a schematic diagram of the inclined sieve plate structure of this application;
[0017] Figure 4 This is a schematic diagram of the eccentric rotor structure of this application.
[0018] The markings in the diagram are: 1. Screening box; 2. Crushing equipment shell; 3. L-shaped mounting plate; 4. Mounting cross plate; 5. Inclined screen plate; 6. Limiting rod; 7. Spring; 8. Vibrating screening mechanism; 801. Main drive shaft; 802. Eccentric wheel; 803. Arc-shaped protrusion; 804. Drive gear; 805. Fixing plate; 806. Motor; 807. Drive wheel; 9. Sealing connection plate; 10. Threaded hole; 11. Locking bolt; 12. T-shaped connecting block; 13. T-shaped groove; 14. Discharge hole; 15. Material retaining shell; 16. Inclined guide plate; 17. Sealing strip; 18. Dust suction pipe. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0020] refer to Figures 1-4 As shown, a crushing and screening equipment for safe production in open-pit mines includes a screening box 1. Two dust suction pipes 18 are fixedly installed on the top surface of the screening box 1, and the ends of the two dust suction pipes 18 away from the screening box 1 are connected to an external dust suction pump. Multiple discharge holes 14 are opened on the front side of the screening box 1, and a baffle shell 15 is fixedly installed on the front side of the screening box 1. Multiple inclined guide plates 16 are fixedly installed inside the baffle shell 15. By cooperating with the external dust suction pump, the dust generated during the screening process can be sucked away in time, reducing the pollution of the working environment and the impact on the health of the operators caused by dust overflow. By cooperating with the baffle shell 15 and the inclined guide plates 16, the multiple discharge holes 14, together with the baffle shell 15 and the inclined guide plates 16, can realize the graded discharge of materials of different particle sizes, avoiding material accumulation and blockage. At the same time, the inclined guide plates 16 can guide the material to be output in a specific direction, improving the discharge efficiency.
[0021] refer to Figures 1-4 As shown, the crushing equipment shell 2 is fixedly installed on the top surface of the screening box 1. By adopting an integrated installation design between the crushing equipment shell 2 and the screening box 1, continuous operation of ore crushing and screening can be realized, eliminating the material transfer link between equipment, thereby reducing energy loss and effectively saving the space occupied by the equipment. Inside the crushing equipment shell 2, there is a crushing structure driven by a motor. This crushing structure uses two sets of crushing rollers, one set of coarse crushing rollers and the other set of fine crushing rollers. In this way, the ore entering the crushing equipment shell 2 through the feed hopper can be crushed. Since this type of crushing structure is common in practical applications and belongs to the existing mature structure, it will not be described in detail here.
[0022] refer to Figures 1-4As shown, an L-shaped mounting plate 3 is installed inside the screening box 1. A sealing strip 17 is fixedly installed on the side of the L-shaped mounting plate 3. A universal wheel with brake is rotatably connected to the bottom surface of the L-shaped mounting plate 3 near the corner. T-shaped connecting blocks 12 are fixedly installed on the opposite sides of multiple mounting horizontal plates 4. Multiple T-shaped grooves 13 corresponding to the T-shaped connecting blocks 12 are symmetrically opened on the inner side wall of the screening box 1. The T-shaped connecting blocks 12 are inserted into the inside of the T-shaped grooves 13. A sealing gasket is provided inside the T-shaped grooves 13. An arc-shaped transition surface is provided at the end of the T-shaped connecting block 12 near the T-shaped groove 13. The left side of the screening box 1 is an open structure. The sealing strip 17 and the sealing gasket are used to enhance the sealing between the L-shaped mounting plate 3 and the screening box 1, further reducing dust leakage. The universal wheels with brakes make it easy for the L-shaped mounting plate 3 to enter and exit the screening box 1 as a whole, which facilitates the inspection, maintenance or replacement of components such as the inclined screen plate 5. The T-shaped connecting block 12 and the T-shaped groove 13 are used to ensure the installation stability of the L-shaped mounting plate 3 in the screening box 1. The arc transition surface reduces the frictional resistance during insertion and removal, making disassembly and assembly more convenient.
[0023] refer to Figures 1-4 As shown, multiple mounting horizontal plates 4 are evenly spaced and arrayed on the inner wall of the L-shaped mounting plate 3, and each mounting horizontal plate 4 has an inclined screen plate 5 on its top surface. A limiting rod 6 is movably inserted through the top surface of the mounting horizontal plate 4. The top end of the limiting rod 6 is fixed to the bottom surface of the inclined screen plate 5, and a spring 7 is provided on the outer surface of the limiting rod 6. The top end of the spring 7 is fixed to the bottom surface of the inclined screen plate 5, and the bottom end of the spring 7 is fixed to the top surface of the mounting horizontal plate 4. A vibrating screening mechanism 8 connected to the inclined screen plate 5 is provided on one side of the L-shaped mounting plate 3. The limiting rod 6 provides a limiting and guiding function for the inclined screen plate 5, preventing it from shifting during vibration. The spring 7 buffers the vibration impact force of the inclined screen plate 5, reduces component wear, and extends the service life of the inclined screen plate 5. By using multiple inclined screen plates 5 in conjunction with the vibrating screening mechanism 8, multi-stage screening of crushed ore can be achieved, improving screening accuracy and meeting the needs of open-pit mines for ores of different particle sizes.
[0024] refer to Figures 1-4 As shown, a sealing connection plate 9 is fixedly installed on the side of the L-shaped mounting plate 3 away from the screening box 1. Multiple threaded holes 10 are provided on the left side of the screening box 1 near the corner. Multiple locking bolts 11 corresponding to the threaded holes 10 are movably inserted through one side of the sealing connection plate 9. One end of the locking bolt 11 is threaded into the inside of the threaded hole 10. By connecting the locking bolt 11 with the threaded hole 10, the L-shaped mounting plate 3 can be firmly fixed in the screening box 1, ensuring the structural stability of the equipment during operation. At the same time, the detachable connection method facilitates quick disassembly and assembly of the L-shaped mounting plate 3, improving the convenience of equipment maintenance.
[0025] refer to Figures 1-4 As shown, the vibrating screening mechanism 8 includes a main drive shaft 801, an eccentric wheel 802, an arc-shaped protrusion 803, a drive gear 804, a fixed plate 805, a motor 806, and a drive wheel 807. The main drive shaft 801 is rotatably connected to one side of the L-shaped mounting plate 3, located on the bottom surface of the inclined screen plate 5. The eccentric wheel 802 is fixedly mounted on the outer surface of the main drive shaft 801 near its center. An arc-shaped protrusion 803 corresponding to the eccentric wheel 802 is fixedly mounted on the bottom surface of the inclined screen plate 5. A seal is passed through the left end of the main drive shaft 801. On one side of the connecting plate 9, a drive gear 804 is fixedly mounted on the outer surface of the main drive shaft 801 near its left end. A fixing plate 805 is fixedly mounted on one side of the sealing connecting plate 9, and a motor 806 is fixedly mounted on one side of the fixing plate 805. A drive wheel 807 is fixedly mounted on the drive end of the motor 806, and the drive wheel 807 meshes with the drive gear 804. A bearing is mounted on one side of the L-shaped mounting plate 3, and one end of the outer surface of the main drive shaft 801 is mounted in the middle of the bearing, thus enabling the rotation of the main drive shaft 801. Three main drive shafts 801 are installed, corresponding to the inclined screen plate 5. Each of the three main drive shafts 801 has a drive gear 804 installed at one end. The three drive gears 804 mesh with each other. The drive wheel 807 is meshed with one of the three drive gears 804. This allows the motor 806 to start, driving the drive wheel 807 and the drive gear 804 to rotate, thus causing the drive gear 804 to drive the main drive shafts 801 to rotate stably. This results in high transmission efficiency and low power loss. When the eccentric wheel 802 rotates with the main drive shaft 801, it can generate periodic impact force in conjunction with the arc-shaped protrusion 803, driving the inclined screen plate 5 to vibrate. The vibration frequency is controllable, and the screening intensity can be adjusted according to the characteristics of the ore to improve screening efficiency. At the same time, multiple bearing seats corresponding to the main drive shaft 801 are installed on the inner side wall of the screening box 1. When the L-shaped mounting plate 3 is installed inside the screening box 1, the right end of the main drive shaft 801 will be inserted into the inside of the bearing seat to achieve stable rotation of the main drive shaft 801.
[0026] The implementation principle of the crushing and screening equipment for safe production in open-pit mines according to this application is as follows: First, the operator conveys the ore to be crushed and screened to the hopper at the top of the crushing equipment shell 2 via a conveyor belt. At this time, the crushing structure inside the crushing equipment shell 2 starts and crushes the ore. The crushed ore enters the screening box 1 through the discharge port of the crushing equipment shell 2 and falls onto the inclined screen plate 5 on the L-shaped mounting plate 3. Subsequently, the operator starts the motor 806 in the vibrating screening mechanism 8. The motor 806 drives the drive wheel 807 to rotate, which in turn drives the main drive shaft 801 to rotate through meshing with the drive gear 804. The eccentric wheel 802 on the main drive shaft 801 rotates synchronously with it and periodically contacts the arc-shaped protrusion 803 on the bottom surface of the inclined screen plate 5. Under the guidance of the limit rod 6 and the buffering effect of the spring 7, the inclined screen plate 5 generates stable vibration. During the vibration process, ores of different particle sizes are stratified on the inclined screen plate 5. Fine particles of ore fall through the screen holes and are further screened by the inclined screen plate 5 below. Finally, they are discharged through the corresponding discharge hole 14 on the front side of the screening box 1. Coarse particles of ore that do not pass through the screen holes slide along the inclined screen plate 5 to the end and are discharged through the corresponding discharge hole 14, thereby realizing multi-stage precise screening of ore.
[0027] Dust generated during the screening process is promptly sucked away by the dust suction pipe 18 on the top surface of the screening box 1, effectively reducing dust overflow and protecting the working environment and the health of operators. At the same time, the baffle shell 15 and the inclined guide plate 16 work together to guide the ores of different particle sizes to be discharged in a directional manner, avoiding material accumulation and improving discharge efficiency. When it is necessary to inspect, clean or replace the inclined screen plate 5, the operator can unscrew the locking bolts 11 on the sealing connection plate 9, release the L-shaped mounting plate 3 from the screening box 1, and pull it out of the screening box 1 as a whole through the universal casters with brakes on the bottom surface of the L-shaped mounting plate 3. The operation is convenient and greatly reduces the maintenance difficulty of the screen plate.
[0028] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A crushing and screening device for safe production in open-pit mines, comprising a screening box (1), characterized in that: The top surface of the screening box (1) is fixedly installed with a crushing equipment shell (2). An L-shaped mounting plate (3) is provided inside the screening box (1). Multiple mounting horizontal plates (4) are installed in an evenly spaced array on the inner side wall of the L-shaped mounting plate (3). An inclined screen plate (5) is provided on the top surface of each of the multiple mounting horizontal plates (4). A limiting rod (6) is movably passed through the top surface of the mounting horizontal plate (4). The top end of the limiting rod (6) is fixed to the bottom surface of the inclined screen plate (5). A spring (7) is provided on the outer surface of the limiting rod (6). The top end of the spring (7) is fixed to the bottom surface of the inclined screen plate (5). The bottom end of the spring (7) is fixed to the top surface of the mounting plate (4). A vibrating screening mechanism (8) connected to the inclined screen plate (5) is provided on one side of the L-shaped mounting plate (3). A sealing connecting plate (9) is fixedly installed on the side of the L-shaped mounting plate (3) away from the screening box (1). Multiple threaded holes (10) are opened on the left side of the screening box (1) near the corner. Multiple locking bolts (11) corresponding to the threaded holes (10) are movably passed through one side of the sealing connecting plate (9). One end of the locking bolt (11) is threaded into the inside of the threaded hole (10).
2. The crushing and screening equipment for safe production in open-pit mines as described in claim 1, characterized in that: The vibrating screening mechanism (8) includes a main drive shaft (801), an eccentric wheel (802), an arc-shaped protrusion (803), a drive gear (804), a fixed plate (805), a motor (806), and a drive wheel (807). The main drive shaft (801) is rotatably connected to one side of the L-shaped mounting plate (3) on the bottom surface of the inclined screen plate (5). The eccentric wheel (802) is fixedly mounted on the outer surface of the main drive shaft (801) near the middle. The bottom surface of the inclined screen plate (5) is fixedly mounted with the eccentric wheel (802). The corresponding arc-shaped protrusion (803) has the left end of the main drive shaft (801) passing through one side of the sealing connecting plate (9). The main drive shaft (801) is fixedly mounted with a drive gear (804) near the outer surface of the left end. A fixing plate (805) is fixedly mounted on one side of the sealing connecting plate (9). A motor (806) is fixedly mounted on one side of the fixing plate (805). A drive wheel (807) is fixedly mounted on the drive end of the motor (806). The drive wheel (807) meshes with the drive gear (804).
3. The crushing and screening equipment for safe production in open-pit mines as described in claim 1, characterized in that: T-shaped connecting blocks (12) are fixedly installed on the opposite sides of the multiple mounting horizontal plates (4). Multiple T-shaped grooves (13) corresponding to the T-shaped connecting blocks (12) are symmetrically opened on the inner side wall of the screening box (1). The T-shaped connecting blocks (12) are inserted into the inside of the T-shaped grooves (13). A sealing gasket is provided inside the T-shaped grooves (13). An arc-shaped transition surface is provided at the end of the T-shaped connecting block (12) near the T-shaped grooves (13).
4. The crushing and screening equipment for safe production in open-pit mines as described in claim 1, characterized in that: The screening box (1) has multiple discharge holes (14) on its front side, and a baffle shell (15) is fixedly installed on the front side of the screening box (1). Multiple inclined guide plates (16) are fixedly installed inside the baffle shell (15).
5. The crushing and screening equipment for safe production in open-pit mines as described in claim 1, characterized in that: A sealing strip (17) is fixedly installed on the side of the L-shaped mounting plate (3), and a universal wheel with brake is rotatably connected to the bottom surface of the L-shaped mounting plate (3) near the corner.
6. The crushing and screening equipment for safe production in open-pit mines as described in claim 1, characterized in that: Two dust suction pipes (18) are fixedly installed on the top surface of the screening box (1), and the ends of the two dust suction pipes (18) away from the screening box (1) are connected to an external dust suction pump.