A crushing device for processing magnesium hydroxide with a screening structure

Abstract

The utility model relates to crushing technical field especially, it relates to a kind of crushing equipment with screening structure for magnesium hydroxide processing, including with bracket crushing box and screening frame, motor is installed on the chassis of with bracket crushing box, two groups of counter-rotating crushing roller are rotatably connected in with bracket crushing box, screen is detachably installed in screening frame, pressure sensor is installed in screen lower end, further include connecting frame and clearing block, clearing block is fixedly connected on the upper surface of connecting frame, the mesh of clearing block and screen is one-to-one, real-time pressure data is transmitted to PLC controller by pressure sensor, control instruction is generated by comparing preset parameter, and lifting mechanism drives to execute mesh dredging operation;The utility model uses mesh one-to-one clearing block mechanical insertion type dredging, can directly physically destroy fine powder aggregate, dredging efficiency is obviously improved, only when measured blockage exceeds preset threshold, start clearing block program, so that equipment is always in optimal energy consumption ratio state.

Description

Technical Field

[0001] This utility model relates to the field of crushing technology, and in particular to a crushing device for processing magnesium hydroxide with a screening structure. Background Technology

[0002] Magnesium hydroxide, as an important inorganic flame retardant and environmentally friendly material, requires the raw material to be crushed to a specific particle size range during its processing to meet application requirements. Traditional magnesium hydroxide crushing equipment usually uses a combination of jaw crusher or hammer crusher with vibrating screen.

[0003] However, significant technical defects exist in actual production: First, magnesium hydroxide material has significant adhesion and hygroscopic properties, making it prone to fine powder agglomeration during crushing. This directly leads to frequent screen clogging, severely affecting production efficiency. The mechanical vibration or airflow backflushing anti-clogging devices commonly used in the industry have obvious shortcomings: On the one hand, the amplitude adjustment range of traditional vibrating screens is limited (usually only 3-5mm), which is not effective in removing fine particles adhering to the mesh; on the other hand, existing equipment lacks an intelligent clogging monitoring system, making it impossible to accurately determine the degree of screen clogging in real time. It must rely on manual inspection to determine the clogging situation. This passive maintenance method often makes it difficult to detect and deal with clogging problems in a timely manner, resulting in decreased production efficiency and increased energy consumption. These problems are particularly prominent when processing high-humidity (moisture content >3%) magnesium hydroxide material, which seriously restricts the continuous and stable operation of the production line.

[0004] Therefore, given that existing devices are unable to effectively remove fine magnesium hydroxide particles adhering to the mesh and cannot accurately determine the degree of screen blockage in real time, and that passive maintenance methods easily lead to increased energy consumption, a crushing device for magnesium hydroxide processing with a screening structure can be designed. This device uses mechanically inserted unblocking components with one-to-one mesh size to directly and physically destroy fine powder agglomerates, improving the removal effect. Based on a distributed pressure sensing network, it can achieve instant unblocking of magnesium hydroxide screen blockage. Utility Model Content

[0005] In order to overcome the problem that existing devices are unable to effectively remove the fine magnesium hydroxide particles adhering to the mesh and cannot accurately determine the degree of screen blockage in real time, passive maintenance methods are prone to increasing energy consumption.

[0006] The technical solution of this utility model is as follows: a crushing device for processing magnesium hydroxide with a screening structure, including a crushing box with a support and a screening frame. A motor is installed on the base frame of the crushing box with a support. Two sets of crushing rollers rotating in opposite directions are rotatably connected inside the crushing box with a support. A screen is detachably installed inside the screening frame. The inlet end of the screen is provided with a guide plate aligned vertically with the outlet end of the crushing box. A transmission component is provided between the motor and the crushing rollers to realize power transmission. A pressure sensor is installed at the lower end of the screen. The device also includes a connecting frame and a clearing component. The clearing component is fixedly connected to the upper surface of the connecting frame. The clearing component corresponds one-to-one with the mesh of the screen. The pressure sensor transmits real-time pressure data to the PLC controller. By comparing preset parameters and generating control commands, the lifting mechanism is driven to perform the mesh clearing operation.

[0007] Preferably, the motor drives two sets of crushing rollers to rotate in opposite directions through a transmission assembly. Magnesium hydroxide raw material is fed into the feed port of the crushing box with a support, and is squeezed and sheared between the counter-rotating crushing rollers to achieve preliminary crushing. The crushed material is discharged through the outlet end and guided into the screening frame by the guide plate. The screen, which can be detachably installed inside the screening frame, classifies and screens the material. Particles that meet the particle size requirements fall through the screen and are screened. Oversized particles are blocked above the screen and collected separately. When the screen mesh becomes clogged, the lifting mechanism drives the connecting frame and the unblocking component fixed thereon to move upward. The unblocking component corresponds one-to-one with the mesh of the screen and is mechanically unblocked by inserting into the mesh. After the unblocking is completed, the lifting mechanism drives the unblocking component to reset, ensuring that the screening operation continues to be carried out efficiently.

[0008] Preferably, the transmission assembly includes a timing pulley and gears. There are two sets of timing pulleys, which are respectively installed on the outer circumference of the crushing roller and the motor shaft journal. Power is transmitted through the timing belt sleeved on the outer side. Gears are installed on the outer circumference of the crushing roller, and the gears mesh with each other.

[0009] Preferably, the diameter d of the unclogging component satisfies d≤0.8D, where D is the mesh diameter of the screen.

[0010] Preferably, the distance between the unclogging component and the inner wall of the screen mesh is less than 5mm.

[0011] Preferably, the unblocking component has an axial through hole, and the air pipes are installed inside the unblocking component through the through hole. Each air pipe is connected to an external compressed air source through a parallel pipeline.

[0012] Preferably, a ring of brushes is evenly distributed circumferentially on the outer periphery of the unclogging component, and the radius R of the brushes satisfies R > R1, where R1 is the mesh diameter of the screen.

[0013] Preferably, the unblocking component is covered with a rubber sleeve, and its outer diameter is interference-fitted with the inner wall of the mesh. The unblocking component integrates PZT piezoelectric ceramic to generate high-frequency micro-amplitude vibration.

[0014] Preferably, the screen is raised and lowered by a cylinder, the cylinder body is fixed to the bottom of the screening machine frame, and the end of the piston rod is rigidly connected to the connecting frame.

[0015] The beneficial effects of this utility model are as follows: It employs a mechanical insertion method with one-to-one mesh-corresponding unblocking components, achieving unblocking precision down to the micron level. Especially for magnesium hydroxide materials with a moisture content >3%, the unblocking components can directly and physically break down fine powder agglomerates, significantly improving unblocking efficiency compared to airflow backflushing. A distributed pressure sensor network monitors load changes in each area of ​​the screen in real time, and the PLC controller dynamically adjusts the unblocking threshold based on the characteristics of magnesium hydroxide materials (such as moisture content and particle size distribution). The closed-loop control of the pressure sensors and PLC achieves a response speed of 0.1 seconds, ensuring immediate blockage handling. Traditional vibrating screens continue to operate when blocked, resulting in some ineffective energy consumption. This solution, through intelligent linkage between pressure data and the lifting mechanism, only activates the unblocking program when the measured blockage exceeds a preset threshold, ensuring the equipment is always in an optimal energy consumption state. Attached Figure Description

[0016] Figure 1 The diagram shown is a first three-dimensional structural schematic of Embodiment 1 of the crushing equipment for processing magnesium hydroxide with a screening structure according to this utility model;

[0017] Figure 2 The diagram shown is a cross-sectional perspective view of Embodiment 1 of the crushing equipment for processing magnesium hydroxide with a screening structure according to this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the unblocking component in Example 2 of the crushing equipment for processing magnesium hydroxide with a screening structure according to this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the unblocking component in Example 3 of the crushing equipment for processing magnesium hydroxide with a screening structure according to this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional structural schematic of the unblocking component in Example 4 of the crushing equipment for processing magnesium hydroxide with a screening structure according to this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Crushing box with support; 2. Motor; 3. Screening frame; 4. Crushing roller; 5. Screen; 6. Guide plate; 71. Synchronous pulley; 72. Gear; 73. Synchronous belt; 8. Cylinder; 9. Connecting frame; 10. Unblocking component; 11. Through hole; 12. Air pipe; 13. Brush; 14. Rubber sleeve. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Example 1

[0024] Please see Figure 1 and Figure 2 This utility model provides an embodiment: a crushing device for processing magnesium hydroxide with a screening structure, including a crushing box 1 with a support and a screening frame 3. A motor 2 is installed on the base frame of the crushing box 1. Two sets of counter-rotating crushing rollers 4 are rotatably connected inside the crushing box 1. A screen 5 is detachably installed inside the screening frame 3. The inlet end of the screen 5 is provided with a guide plate 6 aligned vertically with the outlet end of the crushing box. A transmission assembly is provided between the motor 2 and the crushing rollers 4 for power transmission. A pressure sensor is installed at the lower end of the screen 5. The device also includes a connecting frame 9 and a clearing component 10. The clearing component 10 is fixedly connected to the upper surface of the connecting frame 9. The unblocking component 10 corresponds one-to-one with the mesh openings of the screen 5. The pressure sensor transmits real-time pressure data to the PLC controller. By comparing preset parameters and generating control commands, the lifting mechanism is driven to perform the mesh unblocking operation. The transmission components include synchronous pulleys 71 and gears 72. Two sets of synchronous pulleys 71 are provided, which are respectively installed on the outer circumference of the journal of the crushing roller 4 and the motor 2. Power transmission is achieved through the synchronous belt 73 sleeved on the outer side. Gears 72 are installed on the outer circumference of the crushing roller 4, and the gears 72 mesh with each other. The screen 5 is driven to lift and lower by the cylinder 8. The cylinder body of the cylinder 8 is fixed to the bottom of the screening frame 3, and the end of the piston rod is rigidly connected to the connecting frame 9.

[0025] During operation, motor 2 transmits power to the synchronous pulley 71 at the shaft end of crushing roller 4 via synchronous pulley 71 and synchronous belt 73 on its journal, driving the two sets of crushing rollers 4 to rotate. Simultaneously, gears 72 mounted on the outer circumference of crushing roller 4 mesh with each other, ensuring that the two sets of crushing rollers 4 maintain precise counter-rotation. Magnesium hydroxide raw material is fed into the feed inlet of the crushing box 1 with support, and is squeezed and sheared between the counter-rotating crushing rollers 4, achieving preliminary crushing. The crushed material is discharged through the outlet end, and the crushed material is guided by the guide plate 6 into the feed... The material enters the screening frame 3, where a detachable screen 5 is installed to classify and screen the material. Particles that meet the particle size requirements fall through the screen 5, completing the screening. Oversized materials are blocked above the screen 5 and collected separately. When the mesh of the screen 5 becomes clogged, the cylinder 8 drives the connecting frame 9 and the unblocking component 10 fixed thereon to move upward. The unblocking component 10 corresponds one-to-one with the mesh of the screen 5 and is inserted into the mesh to achieve mechanical unblocking. After the unblocking is completed, the lifting mechanism drives the unblocking component 10 to reset, ensuring that the screening operation continues to be carried out efficiently.

[0026] Example 2

[0027] Please see Figure 3 The difference from Embodiment 1 is that the unblocking component 10 has an axial through hole 11, and the air pipe 12 is installed inside the unblocking component 10 through the through hole 11. Each air pipe 12 is connected to an external compressed air source through a parallel pipeline.

[0028] The air pipe 12 that runs through the unblocking component 10 is connected to an external air source. During the lifting and lowering process, compressed air is ejected from the through hole 11 to form a radial airflow. This design removes the magnesium hydroxide fine powder adhering to the mesh through air blowing, and is especially suitable for preventing clogging of high-humidity materials. The airflow pressure is adjustable from 0.2 to 0.5 MPa. Combined with mechanical poking, it achieves double unblocking and reduces the residual rate of the screen 5.

[0029] Example 3

[0030] Please see Figure 4 The difference from Example 1 is that a ring of brushes 13 is evenly distributed around the outer circumference of the unblocking component 10. The radius R of the brushes 13 satisfies R > R1, where R1 is the mesh diameter of the screen 5. The diameter d of the unblocking component 10 satisfies d ≤ 0.8D, where D is the mesh diameter of the screen 5.

[0031] Ensure that the brush bristles always contact the edge of the mesh. When the unclogging component 10 is raised and lowered, the brush 13 scrapes the inner wall of the mesh in a circumferential manner to effectively remove magnesium hydroxide crystals. At the same time, the elastic deformation of the brush can adapt to different degrees of clogging.

[0032] Example 4

[0033] Please see Figure 5 The difference from Example 1 is that the unblocking component 10 is covered with a rubber sleeve 14, the outer diameter of which is interference-fitted with the inner wall of the mesh, and the unblocking component 10 integrates PZT piezoelectric ceramic to generate high-frequency micro-amplitude vibration. The distance between the unblocking component 10 and the inner wall of the mesh of the screen 5 is less than 5mm.

[0034] The rubber sleeve 14 is interference-fitted with the mesh with an interference of 0.3-0.5mm. The PZT piezoelectric ceramic drives the unclogging component 10 to generate high-frequency vibration of 20-50kHz. The vibration is transmitted to the inner wall of the mesh through the rubber sleeve 14, causing the adhering material to fall off. The spacing <5mm ensures that the vibration energy is concentrated. This solution is particularly suitable for the anti-clogging needs of ultrafine powder particles with a particle size <100 mesh.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A crushing device for processing magnesium hydroxide with a screening structure, comprising a crushing box (1) with a support frame and a screening frame (3), wherein a motor (2) is installed on the base frame of the crushing box (1), two sets of counter-rotating crushing rollers (4) are rotatably connected inside the crushing box (1), a screen (5) is detachably installed inside the screening frame (3), and a guide plate (6) is provided at its inlet end aligned vertically with the outlet end of the crushing box; a transmission assembly is provided between the motor (2) and the crushing rollers (4) for power transmission; and a pressure sensor is installed at the lower end of the screen (5), characterized in that: It also includes a connecting frame (9) and a blockage clearing component (10). The upper surface of the connecting frame (9) is fixedly connected to the blockage clearing component (10). The blockage clearing component (10) corresponds one-to-one with the mesh of the screen (5). The pressure sensor transmits real-time pressure data to the PLC controller. By comparing the preset parameters and generating control commands, the lifting mechanism is driven to perform the mesh clearing operation.

2. The crushing equipment for processing magnesium hydroxide with a screening structure according to claim 1, characterized in that: The transmission assembly includes a synchronous pulley (71) and a gear (72). There are two sets of synchronous pulleys (71), which are respectively installed on the outer circumference of the journal of the crushing roller (4) and the motor (2). Power transmission is achieved through the synchronous belt (73) sleeved on the outer side. Gears (72) are installed on the outer circumference of the crushing roller (4), and the gears (72) mesh with each other.

3. The crushing equipment for processing magnesium hydroxide with a screening structure according to claim 1, characterized in that: The diameter d of the unblocking component (10) satisfies d≤0.8D, where D is the mesh diameter of the screen (5).

4. The crushing equipment for processing magnesium hydroxide with a screening structure according to claim 1, characterized in that: The distance between the unblocking component (10) and the inner wall of the mesh (5) is less than 5mm.

5. A crushing device for processing magnesium hydroxide with a screening structure according to claim 3 or 4, characterized in that: The unblocking component (10) has an axial through hole (11), and the air pipe (12) is installed inside the unblocking component (10) through the through hole (11). Each air pipe (12) is connected to an external compressed air source through a parallel pipeline.

6. The crushing equipment for processing magnesium hydroxide with a screening structure according to claim 3, characterized in that: A ring of brushes (13) is evenly distributed along the circumference on the outer circumferential surface of the unblocking component (10). The radius R of the brushes (13) satisfies R > R1, where R1 is the mesh diameter of the screen (5).

7. The crushing equipment for processing magnesium hydroxide with a screening structure according to claim 4, characterized in that: The unblocking component (10) is covered with a rubber sleeve (14) on its outer surface. Its outer diameter is interference-fitted with the inner wall of the mesh. The unblocking component (10) integrates PZT piezoelectric ceramics to generate high-frequency micro-amplitude vibration.

8. The crushing equipment for processing magnesium hydroxide with a screening structure according to claim 1, characterized in that: The screen (5) is driven to rise and fall by the cylinder (8). The cylinder body of the cylinder (8) is fixed to the bottom of the screening machine frame (3), and the end of the piston rod is rigidly connected to the connecting frame (9).

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