Device for preventing clogging of a screen deck of a screening machine

Abstract

The utility model relates to coal screen machine sieve plate anti -blocking technical field, especially prevent sieve machine sieve plate blocking device, including the screening subassembly for coal separation, and the vibration subassembly for screening subassembly provides vibration energy, and the screening subassembly includes screening box, the cover plate at the top of screening box, the polyurethane screen in the inner chamber of screening box, the chain fixed in the cover plate bottom, and the horseshoe ring at polyurethane screen top, the utility model discloses the cooperation structure of chain and horseshoe ring is set up in screening subassembly, when polyurethane screen carries out the movement of running, and horseshoe ring jumps and hits screen surface along with it, effectively destroys the agglomerate of coal bonding, and the high -frequency vibration energy of cooperation vibration subassembly produces, makes the fine coal that sticks in the edge of sieve hole be continuously shaken and falls, through the synergistic effect of mechanical disturbance and vibration energy, effectively solved the problem that the sieve plate bonding blockage of running screen is easy to appear when handling high moisture coal.

Description

Technical Field

[0001] This utility model relates to the field of anti-clogging technology for coal preparation screen plates, and in particular to a device for preventing screen plate clogging in coal preparation screens. Background Technology

[0002] The tension screen is a high-efficiency vibrating screening equipment, mainly used for material classification in industries such as mining, coal, and metallurgy. Its working principle is to use the high-frequency vibration and tension motion of the elastic screen surface to cause the material to be strongly thrown and loosened on the screen surface, thereby improving screening efficiency and processing capacity.

[0003] In the process of coal sorting, coal preparation plants often use tension screens to screen materials. However, in actual operation, due to the high moisture content of coal, coal is prone to sticking when passing through the screen, especially on components such as perforated screen plates. This sticking not only directly blocks the holes on the screen plate surface, thus affecting the normal flow of materials, but also greatly reduces the overall efficiency of the screening operation.

[0004] Therefore, in view of the problem that the screen plate of the tension screen is easily blocked due to coal adhesion in the above-mentioned prior art, which affects the screening efficiency, this utility model proposes a device to prevent screen plate blockage of the screening machine, which can effectively prevent screen plate blockage and thus improve screening efficiency. Utility Model Content

[0005] To overcome the problem of screen plate sticking and clogging that occurs when the existing tension screen is used to process high-moisture coal.

[0006] The technical solution of this utility model is: a device for preventing screen plate blockage of a screening machine, including a screening component for coal sorting and a vibration component for providing vibration energy to the screening component. The screening component includes a screening box, a cover plate located on top of the screening box, a polyurethane screen located in the inner cavity of the screening box, a chain fixed to the bottom of the cover plate, and a horseshoe ring located on top of the polyurethane screen, and the end of the chain away from the cover plate is fixedly connected to the horseshoe ring.

[0007] Preferably, one end of the screening box is the feed inlet and the other end is the discharge outlet. Coal enters the inner cavity of the screening box through the feed inlet and falls on top of the polyurethane screen. The vibration component works in concert to provide vibration energy to drive the polyurethane screen to perform a tensioning motion, thereby enabling the coal to be screened on the surface of the polyurethane screen. During the tensioning motion, the polyurethane screen causes the horseshoe ring to bounce on the surface of the polyurethane screen. The chain can fix the horseshoe ring to prevent its position from shifting. Under the bouncing action of the horseshoe ring, the coal can be prevented from sticking to the surface of the polyurethane screen and causing blockage.

[0008] Preferably, the screening assembly further includes a crossbeam located at the upper end of the inner cavity of the screening box, both ends of which are fixedly connected to the inner wall of the screening box, and the cover plate is fixed to the top of the screening box.

[0009] Preferably, a floating beam is fixedly connected to the lower end of the inner cavity of the screening box, a support plate is fixedly connected to the top of the floating beam, and the polyurethane screen is fixed to the top of the support plate.

[0010] Preferably, the vibration assembly includes a vibration support beam fixed to the top of the screening box, vibrators located at both ends of the vibration support beam, a connecting shaft located between the two vibrators, spring seats located around the screening box, a drive motor, a reducer, and a transmission shaft located on one side of the screening box.

[0011] Preferably, the vibrator is fixed to the top of the vibration support beam, the two vibrators are connected by a connecting shaft, and the spring seat is fixed around the screening box.

[0012] Preferably, the output shaft of the drive motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the transmission shaft.

[0013] Preferably, the end of the drive shaft away from the reducer is connected to the vibrator, and the bottom of the drive motor and the reducer are fixedly connected to a support base.

[0014] The beneficial effects of this invention are as follows: By setting a chain and horseshoe ring cooperation structure in the screening component, when the polyurethane screen performs tensioning motion, the horseshoe ring jumps and strikes the screen surface, effectively breaking down the agglomerates formed by coal adhesion. Combined with the high-frequency vibration energy generated by the vibration component, the fine coal particles adhering to the edge of the screen holes are continuously shaken off. Through the synergistic effect of mechanical disturbance and vibration energy, the problem of screen plate adhesion and blockage that easily occurs when the tensioning screen processes high-moisture coal is effectively solved. At the same time, the frequency of manual cleaning of the screen plate is reduced, significantly reducing equipment downtime for maintenance. Attached Figure Description

[0015] Figure 1 The diagram shown is a front-view three-dimensional structural schematic of this utility model; Figure 2 The diagram shown is a three-dimensional structural schematic of the screening component and the vibration component of this utility model. Figure 3 The diagram shown is a three-dimensional structural schematic of the screening box and vibration assembly of this utility model. Figure 4 This utility model is shown. Figure 2 A magnified structural diagram of point A in the middle.

[0016] Explanation of reference numerals in the attached drawings: 100, screening assembly; 110, screening box; 120, cover plate; 130, polyurethane screen; 140, chain; 150, horseshoe ring; 160, crossbeam; 170, floating beam; 180, support plate; 200, vibration assembly; 210, vibration support beam; 220, vibrator; 230, connecting shaft; 240, spring seat; 250, drive motor; 260, reducer; 270, transmission shaft. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example 1 Please see Figures 1-4 This utility model provides an embodiment of a device for preventing screen plate clogging in a screening machine, including a screening assembly 100 for coal sorting and a vibration assembly 200 for providing vibration energy to the screening assembly 100. The screening assembly 100 includes a screening box 110, a cover plate 120 located on top of the screening box 110, a polyurethane screen 130 located inside the screening box 110, a chain 140 fixed to the bottom of the cover plate 120, and a horseshoe ring 150 located on top of the polyurethane screen 130. One end of strip 140 away from cover plate 120 is fixedly connected to horseshoe ring 150. Screening assembly 100 also includes a crossbeam 160 located at the upper end of the inner cavity of screening box 110. Both ends of crossbeam 160 are fixedly connected to the inner wall of screening box 110. Cover plate 120 is fixed to the top of screening box 110. Floating beam 170 is fixedly connected to the lower end of inner cavity of screening box 110. Support plate 180 is fixedly connected to the top of floating beam 170. Polyurethane screen 130 is fixed to the top of support plate 180.

[0019] During operation, the vibration component 200 is activated, generating regular and continuous vibration energy. This energy is transmitted to the screening component 100, causing the screening box 110 to shake under the vibration, which in turn causes the polyurethane screen 130 inside the box to vibrate. The horseshoe ring 150 located at the top of the polyurethane screen 130 moves up and down with the screen vibration. Since the end of the chain 140 away from the cover plate 120 is fixedly connected to the horseshoe ring 150, the chain 140 also swings. This swinging motion can a certain extent to turn over and disperse the coal on the polyurethane screen 130, preventing coal from accumulating and clogging on the screen. At the same time, the floating beam 170 and the support plate 180 can generate a certain amount of elastic deformation according to the weight of the coal and the vibration during the vibration process, further assisting the polyurethane screen 130 to work better, ensuring that the coal can pass through the screen smoothly for sorting, and improving screening efficiency and effect. Through the vibration energy of the vibration component 200 combined with the movement of the chain 140 and the horseshoe ring 150, the problem of coal sticking and clogging on the surface of the polyurethane screen 130 can be prevented.

[0020] Example 2 Please see Figures 1-4 The difference from Embodiment 1 is that the vibration assembly 200 includes a vibration support beam 210 fixed to the top of the screening box 110, vibrators 220 located at both ends of the vibration support beam 210, a connecting shaft 230 located between the two vibrators 220, spring seats 240 located around the screening box 110, a drive motor 250, a reducer 260 and a transmission shaft 270 located on one side of the screening box 110. The vibrators 220 are fixed to the top of the vibration support beam 210, and the two vibrators 220 are connected by the connecting shaft 230. The spring seats 240 are fixed around the screening box 110. The output shaft of the drive motor 250 is connected to the input shaft of the reducer 260, and the output shaft of the reducer 260 is connected to the transmission shaft 270. The end of the transmission shaft 270 away from the reducer 260 is connected to the vibrator 220. The bottom of the drive motor 250 and the reducer 260 are fixedly connected to the support seats.

[0021] When the vibration assembly 200 enters the working state, the drive motor 250 starts, and its output shaft begins to transmit power to the connected reducer 260. The reducer 260, through its internal gear structure, converts the input high-speed, low-torque power into low-speed, high-torque power, thereby achieving the effect of speed reduction and torque increase. The power processed by the reducer 260 is transmitted to the vibrator 220 via the drive shaft 270. After receiving the power from the drive shaft 270, the vibrator 220 begins to vibrate. To ensure that the two vibrators 220 can work together, they are connected together via a connecting shaft 230, enabling the two vibrators 220 to... Synchronous vibration is achieved, and the vibration energy is evenly and effectively transmitted to the entire screening box 110 through the vibration support beam 210. Around the screening box 110, the spring seats 240 not only buffer the vibration impact but also provide stable support, so that the screening box 110 can maintain a relatively stable state during vibration. This avoids the risk of damage to the equipment due to excessive vibration amplitude and ensures that the material in the screening box 110 can be fully dispersed and screened under vibration. This not only improves screening efficiency but also effectively prevents the clogging problem of the screening plate caused by material accumulation, thus ensuring the smooth operation of the entire screening process.

[0022] 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 device for preventing screen plate clogging in a screening machine, comprising a screening assembly (100) for coal sorting and a vibrating assembly (200) for providing vibration energy to the screening assembly (100), characterized in that: The screening assembly (100) includes a screening box (110), a cover plate (120) located on top of the screening box (110), a polyurethane screen (130) located inside the screening box (110), a chain (140) fixed to the bottom of the cover plate (120), and a horseshoe ring (150) located on top of the polyurethane screen (130), with one end of the chain (140) away from the cover plate (120) fixedly connected to the horseshoe ring (150).

2. The device for preventing screen plate clogging in a screening machine according to claim 1, characterized in that: The screening assembly (100) also includes a crossbeam (160) located at the upper end of the inner cavity of the screening box (110), both ends of the crossbeam (160) being fixedly connected to the inner wall of the screening box (110), and the cover plate (120) being fixed to the top of the screening box (110).

3. The device for preventing screen plate clogging in a screening machine according to claim 2, characterized in that: A floating beam (170) is fixedly connected to the lower end of the inner cavity of the screening box (110), and a support plate (180) is fixedly connected to the top of the floating beam (170). The polyurethane screen (130) is fixed to the top of the support plate (180).

4. The device for preventing screen plate clogging in a screening machine according to claim 1, characterized in that: The vibration assembly (200) includes a vibration support beam (210) fixed to the top of the screening box (110), vibrators (220) located at both ends of the vibration support beam (210), a connecting shaft (230) located between the two vibrators (220), a spring seat (240) located around the screening box (110), a drive motor (250), a reducer (260) and a transmission shaft (270) located on one side of the screening box (110).

5. The device for preventing screen plate clogging in a screening machine according to claim 4, characterized in that: The vibrator (220) is fixed to the top of the vibration support beam (210), and the two vibrators (220) are connected by a connecting shaft (230). The spring seat (240) is fixed around the screening box (110).

6. The device for preventing screen plate clogging in a screening machine according to claim 4, characterized in that: The output shaft of the drive motor (250) is connected to the input shaft of the reducer (260), and the output shaft of the reducer (260) is connected to the transmission shaft (270).

7. The device for preventing screen plate clogging in a screening machine according to claim 4, characterized in that: The end of the drive shaft (270) away from the reducer (260) is connected to the vibrator (220) for transmission, and the bottom of the drive motor (250) and the reducer (260) are fixedly connected to a support.

Images