Anti-clogging screen for a vibrating screen

Abstract

The application discloses a kind of anti-blocking screen plate of vibrating screen, including vibrating screen, multiple layers of screen plate are equipped in vibrating screen, screen hole is equipped on screen plate, multiple transverse grooves are equipped on the side wall of vibrating screen, second sliding block is equipped in transverse groove, screen plate is movably connected between second sliding block, screen plate is connected by quick release with sliding block insertion hole;Fixed rod in transverse groove is cooperated with spring, so that screen plate generates the compound vibration of transverse stretching and longitudinal springing;Screen plate uses soft material such as polyurethane.The multi-directional micro-amplitude vibration of flexible screen plate realizes dynamic unblocking, reduces screen hole blocking rate, and prolongs continuous operation time;Layered screen plate can independently adjust amplitude and vibration direction angle, and is suitable for mixed screening of phosphate rock and silica.The utility model has the characteristics of efficient anti-blocking, rapid maintenance and low energy consumption, and significantly improves the continuity and economy of yellow phosphorus electric furnace production.

Description

Technical Field

[0001] This utility model relates to the field of screening technology, specifically an anti-clogging screen plate for a vibrating screen. Background Technology

[0002] In the production process of yellow phosphorus in electric arc furnaces, particle size control of phosphate rock and silica is a core factor affecting the furnace reaction efficiency and energy consumption. Raw materials need to be precisely sieved to a particle size range of 3-15mm using a vibrating screen to ensure sufficient contact and uniform reaction within the furnace. However, existing vibrating screens have the following drawbacks in yellow phosphorus production: 1. Frequent screen blockage and poor process continuity. Yellow phosphorus raw materials generally have a high powder content (approximately 10%-20%), and the surface of phosphate rock easily absorbs moisture, forming a sticky coating. While traditional polyurethane screens are wear-resistant, their rigid bolt-fixed connection to the screen body limits their dynamic deformation capability. During vibration, sticky powder easily embeds into the screen holes, forming an "arching effect," causing a sharp drop in screening efficiency within 1-2 hours of operation. This necessitates manual clearing of blockages 2-3 times per shift, increasing labor intensity and causing fluctuations in furnace feed due to frequent start-ups and shutdowns, affecting furnace temperature stability. 2. Rigid connections exacerbate fatigue damage to the screen plates. Because the original screen plates are rigidly locked to the screen frame via sidewall bolts, when multiple screen plates are stacked, the lower screen plate bears the dual load of material impact and the gravity of the upper screen plate. Long-term operation easily leads to stress cracks at the bolt connections. Statistics show that the average service life of the screen plates is significantly reduced, and replacement requires disassembling the entire machine's protective plates, resulting in long maintenance times and severely restricting production. 3. The reliance on a single vibration mode and the mismatch between vibration patterns and material characteristics: There is a significant density difference between phosphate rock and silica in yellow phosphorus raw materials. Traditional screen plates rely on a single vertical vibration mode, causing light silica particles to easily suspend on the screen surface, creating "false screening," while heavy phosphate rock remains trapped in the screen holes due to insufficient kinetic energy. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an anti-clogging screen plate for a vibrating screen, which can adapt to the characteristics of yellow phosphorus raw materials, realize multi-directional adaptive vibration of the screen plate, and have the characteristics of rapid maintenance, thus effectively solving the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an anti-clogging screen plate for a vibrating screen, including a vibrating screen, the vibrating screen having multiple layers of screen plates, the screen plates having screen holes, the side wall of the vibrating screen having multiple transverse grooves, the transverse grooves having a second slider, and the screen plates and the second slider being movably connected.

[0005] In a preferred embodiment, the second slider has an insertion hole on the side wall facing the sieve plate, and insertion rods are evenly distributed on the side wall of the sieve plate, with the insertion rods inserted into the insertion hole.

[0006] In a preferred embodiment, the vibrating screen is further provided with multiple vertical grooves on its side wall, which are arranged alternately with the horizontal grooves. Among the multiple inserts on the side wall of the screen plate, a first slider is provided between two adjacent inserts, and the first slider is located in the vertical groove.

[0007] In a preferred embodiment, a fixing rod is provided in the transverse groove, the fixing rod is arranged to pass through the second slider laterally, and springs are sleeved on the fixing rods on both sides of the second slider.

[0008] In a preferred embodiment, the vibrating screen is supported on a frame by an elastic support, a discharge belt is provided at the bottom of the frame, and a collection hopper for outputting fine materials is provided at the bottom of the vibrating screen, with the collection hopper located above the input end of the discharge belt.

[0009] In a preferred embodiment, a pre-feeding mechanism is provided above the input end of the uppermost screen plate of the vibrating screen, and the material output by the pre-feeding mechanism falls onto the uppermost screen plate.

[0010] The vibrating screen is also equipped with a support plate, which is placed on the input end of the uppermost screen plate.

[0011] In a preferred embodiment, the sieve plate is a flexible sieve plate, which is made of at least one of polyurethane, rubber, and silicone.

[0012] The anti-clogging screen plate of the vibrating screen provided by this utility model has the following beneficial effects by adopting the above structure:

[0013] (1) Using polyurethane or rubber soft screen plates, combined with the spring-slider linkage mechanism in the transverse groove, the screen plate can generate a composite motion of transverse stretching and longitudinal elasticity during vibration. This design increases the shedding rate of ore fragments in the screen holes under alternating stress, extends the continuous running time of the screen plate, and effectively improves the screening efficiency.

[0014] (2) The slider group in the horizontal and vertical grooves forms an asymmetric vibration transmission path, which drives the screen plate to generate local high-frequency micro-amplitude vibration, effectively breaking the powder coating layer adhering to the surface of the phosphate rock and solving the problem of ore blockage in the hole. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 2 This is a top view of the structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the overall structure of this utility model during operation.

[0019] In the diagram: 1. Vibrating screen; 2. Screen plate; 201. Screen hole; 3. Horizontal groove; 4. Vertical groove; 5. Insert rod; 6. First slider; 7. Second slider; 701. Insert hole; 8. Fixed rod; 9. Spring; 10. Frame; 11. Collecting hopper; 12. Discharge belt; 13. Front feeding mechanism; 14. Platform plate. Detailed Implementation

[0020] like Figure 1-3 In a vibrating screen, there is an anti-clogging screen plate, which includes a vibrating screen with multiple layers of screen plates and screen holes. The side wall of the vibrating screen has multiple transverse grooves, and a second slider is provided in the transverse groove. The screen plates and the second slider are movably connected.

[0021] In a preferred embodiment, the second slider has an insertion hole on the side wall facing the sieve plate, and insertion rods are evenly distributed on the side wall of the sieve plate, with the insertion rods inserted into the insertion hole.

[0022] In a preferred embodiment, the vibrating screen is further provided with multiple vertical grooves on its side wall, which are arranged alternately with the horizontal grooves. Among the multiple inserts on the side wall of the screen plate, a first slider is provided between two adjacent inserts, and the first slider is located in the vertical groove.

[0023] In a preferred embodiment, a fixing rod is provided in the transverse groove, the fixing rod is arranged to pass through the second slider laterally, and springs are sleeved on the fixing rods on both sides of the second slider.

[0024] In a preferred embodiment, the vibrating screen is supported on a frame by an elastic support, a discharge belt is provided at the bottom of the frame, and a collection hopper for outputting fine materials is provided at the bottom of the vibrating screen, with the collection hopper located above the input end of the discharge belt.

[0025] In a preferred embodiment, a pre-feeding mechanism is provided above the input end of the uppermost screen plate of the vibrating screen, and the material output by the pre-feeding mechanism falls onto the uppermost screen plate.

[0026] The vibrating screen is also equipped with a support plate, which is placed on the input end of the uppermost screen plate.

[0027] In a preferred embodiment, the sieve plate is a flexible sieve plate, which is made of at least one of polyurethane, rubber, and silicone.

[0028] The anti-clogging screen plate of the vibrating screen disclosed in this utility model, taking the screening of a mixture of phosphate rock (particle size 0-20mm, moisture content 6%) and silica (particle size 0-15mm, moisture content 4%) for yellow phosphorus electric furnaces as an example, is implemented as follows:

[0029] (1) Installation of sieve plate

[0030] Align the insert rod 5 of the upper sieve plate with the insertion hole 701 of the second slider 7, and push it horizontally into the transverse groove 3 until the insert rod is locked in place. At the same time, the first slider 6 slides into the vertical groove 4. Install the middle and lower sieve plates in sequence.

[0031] (2) Vibration parameter adjustment

[0032] Upper screen plate: Adjust the preload of spring 9 in the transverse groove 3 to 15mm so that the amplitude reaches 2.5mm and the vibration direction angle is adjusted to +10° (biased towards the material flow direction).

[0033] Lower screen plate: spring preload 8mm, amplitude 1.2mm, vibration direction angle -5° (reverse to enhance the discharge of retained materials).

[0034] (3) Feeding and Operation

[0035] Start the front feeding mechanism 13, set the conveying speed to 0.8m / s, and the material is evenly spread onto the screen surface (thickness 12mm) via the ramp 14.

[0036] The vibrating screen operates at a frequency of 12Hz and an acceleration of 4.5g (driven by a vibrating motor, which is not shown in the diagram), with a screening capacity of 50t / h.

[0037] In the above scheme, the sieve plate 2 can be made of polyurethane, which has high elasticity, wear resistance, tear resistance and oil resistance. It can be made into soft sieve plates with different hardness (such as Shore hardness 60A-95A). It can produce elastic deformation when vibrating, reducing material blockage.

[0038] The sieve plate 2 can also be made of rubber with added fibers or metal skeleton, which has a significant shock absorption and noise reduction effect and is suitable for screening materials that are sensitive to impact.

[0039] The sieve plate 2 can also be made of composite materials, such as rubber + polyurethane laminate, rubber embedded with metal mesh, or fiber reinforcement.

Claims

1. An anti-clogging screen plate for a vibrating screen, comprising a vibrating screen (1), wherein the vibrating screen (1) is provided with multiple layers of screen plates (2), and the screen plates (2) are provided with screen holes (201), characterized in that: The vibrating screen (1) has multiple transverse grooves (3) on its side wall, and a second slider (7) is provided in the transverse groove (3). The screen plate (2) and the second slider (7) are movably connected.

2. The anti-clogging screen plate of a vibrating screen according to claim 1, characterized in that: The second slider (7) has an insertion hole (701) on the side wall facing the sieve plate (2), and insertion rods (5) are evenly distributed on the side wall of the sieve plate (2), and the insertion rods (5) are inserted into the insertion hole (701).

3. The anti-clogging screen plate of a vibrating screen according to claim 2, characterized in that: The vibrating screen (1) is also provided with multiple vertical grooves (4) on its side wall. The multiple vertical grooves (4) are interspersed with the horizontal grooves (3). Among the multiple insert rods (5) on the side wall of the screen plate (2), a first slider (6) is provided between two adjacent insert rods (5). The first slider (6) is located in the vertical groove (4).

4. The anti-clogging screen plate of a vibrating screen according to claim 1, characterized in that: A fixed rod (8) is provided in the transverse groove (3). The fixed rod (8) passes through the second slider (7) laterally. Springs (9) are sleeved on the fixed rods (8) on both sides of the second slider (7).

5. The anti-clogging screen plate of a vibrating screen according to claim 1, characterized in that: The vibrating screen (1) is supported on the frame (10) by an elastic support. The bottom of the frame (10) is provided with a discharge belt (12). The bottom of the vibrating screen (1) is provided with a collection hopper (11) for outputting fine materials. The collection hopper (11) is located above the input end of the discharge belt (12).

6. The anti-clogging screen plate of a vibrating screen according to claim 1, characterized in that: The uppermost screen plate (2) of the vibrating screen (1) is provided with a front feeding mechanism (13) above the input end, and the material output by the front feeding mechanism (13) falls on the uppermost screen plate (2); The vibrating screen (1) is also provided with a mounting plate (14), which is placed on the input end of the uppermost screen plate (2).

7. The anti-clogging screen plate of a vibrating screen according to claim 1, characterized in that: The sieve plate (2) is a soft sieve plate, and the sieve plate (2) is made of at least one of polyurethane, rubber, and silicone.

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