A detachable punched cylinder screen device for coal water slurry rod mill

Abstract

The utility model discloses a detachable punching cylinder screen device for coal water slurry rod mill, including punch screen sheet and support framework, the support framework is the tubular framework structure that is equipped with a plurality of support steel bar and annular steel ring, be equipped with punching on the punch screen sheet, its edge evenly sets up a plurality of thread holes, and the corresponding position of support framework is provided with the same specification thread hole, and the punch screen sheet is fixed with support framework through bolt, and the whole is in the shape of cylinder. The utility model has remarkable effect of preventing blockage, after adopting punch screen sheet, the blockage rate of screen mesh is reduced significantly, improves screening efficiency, and reduces production cost, can guarantee that screening precision keeps stable for a long time.

Description

Technical Field

[0001] This utility model relates to a detachable perforated cylindrical screen device suitable for coal-water slurry rod mills, belonging to the technical field of coal-water slurry preparation and mineral processing equipment. Background Technology

[0002] In the coal-water slurry preparation process, the rod mill plays a crucial role in grinding the raw materials into a slurry that meets the particle size requirements. The cylindrical screen, as an important downstream component of the rod mill, functions primarily to separate qualified coal-water slurry that meets particle size standards from unqualified large particles. Existing cylindrical screens mostly use slotted screen plates, which have several drawbacks. When processing coal-water slurries with high water content and high viscosity, the slots are easily clogged by material, leading to a significant decrease in screening efficiency and making cleaning difficult. Furthermore, the edges of the slots are prone to wear and deformation over long-term use, affecting screening accuracy. In addition, the installation and disassembly of traditional cylindrical screens are cumbersome, increasing equipment maintenance time and costs. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a detachable perforated cylindrical screen suitable for coal-water slurry rod mills, which solves the problems of easy clogging of slotted screen plates, affected screening accuracy, and inconvenient installation and disassembly, thereby improving the quality and efficiency of coal-water slurry preparation.

[0004] To solve this technical problem, this utility model provides a detachable perforated cylindrical screen device for a coal-water slurry rod mill, including a perforated screen plate and a support frame. The support frame is a cylindrical frame structure with multiple support steel bars and annular steel rings. The perforated screen plate has perforations and several threaded holes evenly arranged on its edge. The support frame has threaded holes of the same specification at corresponding positions. The perforated screen plate is fixed to the support frame by bolts and is cylindrical in shape as a whole.

[0005] The supporting steel bar has a "⊥" shaped cross-section, and the base plate of the "⊥" shaped structure is arc-shaped.

[0006] The supporting steel bar has multiple threaded holes on both sides of its "⊥" shaped base plate that are adapted to the edge of the perforated screen plate for connecting the perforated screen plate.

[0007] The support frame is made of high-strength steel, and the edges of the perforated screen are fixed by spot welding.

[0008] The supporting steel bars and the annular steel ring are connected and fixed by continuous welding to ensure the strength and sealing of the weld.

[0009] The perforated screen plate has several rectangular perforations evenly distributed on it. The length and length of the rectangular perforations are determined according to the actual particle size of the coal-water slurry.

[0010] A rubber gasket is provided at the contact point between the bolt and the perforated screen plate.

[0011] The cylindrical screen device has multiple stiffening plates on its inner side, and ear plates at both ends of the stiffening plates are fixed to the inner side of the perforated screen plate through screw holes on the ear plates.

[0012] The cylindrical screen device has a flange at one end.

[0013] Beneficial Effects: This invention offers significant anti-clogging performance. The use of perforated screen plates significantly reduces the clogging rate, improving screening efficiency. The smooth edges of the rectangular perforations minimize wear, ensuring stable screening accuracy over a longer period. The detachable design simplifies installation and disassembly, reducing downtime. Bolted connections allow operators to disassemble and install the screen without specialized tools or complex skills. Optimized welding ensures strong connections between the support frame, the screen, and its components. Rubber gaskets effectively prevent material leakage at the screen-support frame connection. This invention addresses the problems of clogging, reduced screening accuracy, and inconvenient installation and disassembly associated with existing cylindrical screens with slotted sieve plates, thereby improving the quality and efficiency of coal-water slurry preparation and reducing production costs. Attached Figure Description

[0014] Figure 1 This is a schematic axonometric view of the overall structure of this utility model; Figure 2 This utility model Figure 1 Enlarged schematic diagram of section I; Figure 3 This is a schematic diagram of the structure of the perforated screen plate of this utility model; Figure 4 This is a schematic front view of the overall structure of this utility model; Figure 5 This utility model Figure 4 A schematic diagram of the AA cross-section; Figure 6 This utility model Figure 5 Schematic diagram of the connection structure of the middle section II; Figure 7 This is a schematic diagram of the supporting frame of this utility model.

[0015] In the diagram: 1. Flange; 2. Rib plate; 3. Support frame; 4. Perforated screen plate; 5. Rectangular punch; 6. Supporting steel bar; 7. Annular steel ring; 8. Bolt; 9. Rubber gasket. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] like Figures 1-7 As shown, this utility model provides a detachable perforated cylindrical screen device for a coal-water slurry rod mill, including multiple perforated screen plates 4 and a support frame 3. The support frame 3 is a cylindrical frame structure welded together with multiple supporting steel bars 6 and annular steel rings 7. The perforated screen plates 4 are perforated, and their edges are evenly provided with several threaded holes. The support frame 3 is provided with threaded holes of the same specification at corresponding positions. The perforated screen plates 4 are fixed to the support frame 3 by bolts 8, and the whole is cylindrical. Multiple perforated screen plates 4 constitute a screen. This detachable connection method makes the installation and disassembly of the screen simple and quick. When it is necessary to disassemble the screen, simply loosen the bolts 8 to remove the perforated screen plates 4 from the support frame 3, which is convenient for cleaning, maintenance or replacement, reducing downtime and reducing the difficulty of operation.

[0018] The cross-section of the supporting steel bar 6 is a "⊥" shaped structure, and the bottom plate of the "⊥" shaped structure is arc-shaped, which can increase the tightness of the fit between the supporting steel bar 6 and the perforated screen plate 4 and ensure a firm connection.

[0019] The supporting steel bar 6 has multiple threaded holes on both sides of its "⊥" shaped base plate that are adapted to the edge of the perforated screen plate 4 for connecting the perforated screen plate 4.

[0020] The supporting frame 3 is made of high-strength steel, and the edges of both sides of the perforated screen plate 4 are fixed by spot welding. The spot welds are evenly distributed, with a spacing of 50-100mm between each weld. This welding method ensures a firm connection between the entire screen and the supporting frame 3, while preventing excessive welding from affecting the structural strength and screening performance of the screen. The evenly distributed welds can disperse the stress on the screen during operation, preventing damage to the screen due to excessive local stress.

[0021] The supporting steel bar 6 and the annular steel ring 7 are connected and fixed by continuous welding. The supporting steel bar 6 and the annular steel ring 7 are precisely positioned and fixed before welding to ensure the strength and sealing of the weld and prevent material leakage from the weld during subsequent use. After welding, the welded part is ground and burrs and welding slag are removed using sandpaper, grinding machine and other tools to ensure that the surface of the supporting frame 3 is flat and to prevent damage to the screen.

[0022] The perforated screen plate 4 has a number of rectangular perforations 5 evenly distributed on it. The long and short sides of the rectangular perforations 5 are determined according to the actual particle size of the coal-water slurry to ensure that qualified coal-water slurry can pass through the screen smoothly, while effectively intercepting unqualified large particles, ensuring that the screening accuracy requirements can be met. The rectangular perforations 5 have unique advantages: their regular shape and smooth edge transition make them less likely to trap materials compared to the edges of slots. When materials pass through the rectangular perforations 5, the flow is smoother and less prone to blockage. At the same time, the structure has low wear, which can ensure that the screening accuracy remains stable for a long time, reduce screening errors caused by screen wear, and ensure that the quality of coal-water slurry remains stable for a long time.

[0023] A rubber gasket 9 is provided at the contact point between the bolt 8 and the perforated screen plate 4. The rubber gasket 9 serves to buffer and seal, reducing the squeezing damage of the bolt 8 to the perforated screen plate 4 and extending the service life of the perforated screen plate 4. On the other hand, it effectively prevents material leakage at the connection between the perforated screen plate 4 and the support frame 3, ensuring the normal operation of the screening process.

[0024] The inner side of the cylindrical screen device is provided with multiple stiffening plates 2, and the two ends of the stiffening plates 2 are provided with ear plates, which are fixed to the inner side of the perforated screen plate 4 through the screw holes on the ear plates.

[0025] A flange 1 is provided at one end of the cylindrical screen device.

[0026] This invention, by employing perforated screen plates, exhibits significant anti-clogging effects, substantially reducing the clogging rate of the screen and improving screening efficiency. The smooth edges of the rectangular perforations minimize wear, ensuring stable screening accuracy over a longer period. The detachable structure design simplifies and extricates the screen from installation and removal, reducing downtime. The bolted connection design allows operators to disassemble and install the screen without specialized tools or complex skills. The optimized welding method ensures strong connections between the support frame, the screen, and the various components of the support frame itself. The rubber gasket effectively prevents material leakage at the connection between the screen and the support frame.

[0027] The above-described embodiments of this utility model are merely illustrative examples and are not the only ones. All modifications within the scope of this utility model or equivalent to this utility model are encompassed by this utility model.

Claims

1. A detachable perforated cylindrical screen device for a coal-water slurry rod mill, characterized in that: It includes a perforated screen plate (4) and a support frame (3). The support frame (3) is a cylindrical frame structure with multiple support steel bars (6) and annular steel rings (7). The perforated screen plate (4) has perforations and several threaded holes are evenly arranged on its edge. The support frame (3) has threaded holes of the same specification at the corresponding position. The perforated screen plate (4) is fixed to the support frame (3) by bolts (8) and the whole is cylindrical.

2. The detachable perforated cylindrical screen device for a coal-water slurry rod mill according to claim 1, characterized in that: The cross section of the supporting steel bar (6) is a "⊥" shaped structure, and the bottom plate of the "⊥" shaped structure is arc-shaped.

3. The detachable perforated cylindrical screen device for a coal-water slurry rod mill according to claim 1, characterized in that: The supporting steel bar (6) has multiple threaded holes on both sides of the "⊥" shaped structure base plate that are adapted to the edge of the perforated screen plate (4) for connecting the perforated screen plate (4).

4. The detachable perforated cylindrical screen device for a coal-water slurry rod mill according to claim 1, characterized in that: The support frame (3) is made of high-strength steel, and the edges of the perforated screen (4) on both sides are fixed by spot welding.

5. The detachable perforated cylindrical screen device for a coal-water slurry rod mill according to claim 1, characterized in that: The supporting steel bar (6) and the annular steel ring (7) are connected and fixed by continuous welding to ensure the strength and sealing of the weld.

6. The detachable perforated cylindrical screen device for a coal-water slurry rod mill according to claim 1, characterized in that: The perforated screen (4) has several rectangular perforations (5) evenly distributed on it. The length and length of the rectangular perforations (5) are determined according to the actual particle size of the coal-water slurry.

7. The detachable perforated cylindrical screen device for a coal-water slurry rod mill according to claim 1, characterized in that: A rubber gasket (9) is provided at the contact point between the bolt (8) and the perforated screen plate (4).

8. The detachable perforated cylindrical screen device for a coal-water slurry rod mill according to claim 1, characterized in that: The inner side of the cylindrical screen device is provided with multiple stiffening plates (2), and the two ends of the stiffening plates (2) are provided with ear plates, which are fixed to the inner side of the perforated screen plate (4) through the screw holes on the ear plates.

9. The detachable perforated cylindrical screen device for a coal-water slurry rod mill according to any one of claims 1-8, characterized in that: The cylindrical screen device is provided with a flange (1) at one end.

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