Heteroaxial combined cross screen assembly
Through the design of the different-axis combined cross screen assembly, the staggered arrangement of disc and door screens and the difference in the number of teeth is used to automatically eliminate jamming materials, prevent piles and overloads, and ensure the stable operation of cross screens.
Patent Information
- Application Number
- CN202422422367.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The existing cross-sieve is prone to blockage of screen surface materials and large pieces of gangue when the coal is wet or the coal feed is too large, resulting in motor overload and screen shaft wear, and the existing solutions lead to production interruption.
The transverse-axis combined cross-screen components are adopted, including the disc-type screen screen shaft and the door-type screen screen shaft are arranged in an interlaced manner. The disc-type screen and the door-type screen are of varying number of teeth. The door-type screen is elastically deformed horizontally under extrusion, which automatically eliminates the blockage of materials and prevents piles and overloads.
Enhance material disturbance, prevent stacking and jamming, avoid overloading of screen shafts, and ensure production continuity.
Smart Images
Figure CN223249881U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a heteroaxial combined cross screen component, belonging to the technical field of coal preparation machinery. Background Art
[0002] The cross screen is a new type of raw coal screening equipment that is obtained by changing the parallel arrangement of the screen plates to a staggered arrangement based on the roller screen. It is mainly used for coal grading in industries such as coal mines and power plants. It has a large processing capacity, low noise, smooth and vibration-free operation, and good sealing. It is a key equipment for raw coal preparation screening and fine-grained powder removal. The screen surface of the cross screen is composed of multiple parallel screen shaft assemblies equipped with parts such as screen plates. The screen plates between the shafts are staggered and cross each other. During operation, the motor drives the screen shaft assembly to rotate through the transmission device. The gaps between adjacent screen shafts and screen plates form sieve holes. Materials smaller than the sieve holes pass through the sieve holes due to their own weight and the rotational force of the screen shaft to become undersize materials. Materials larger than the sieve holes are moved by the sieve plates and continue to move forward along the screen surface to become oversize materials, ultimately achieving material grading.
[0003] However, when the coal is sticky and wet, or the coal feed rate is too high, the screen surface is prone to pile-up, causing motor overload. When large pieces of gangue get stuck, the screen shaft drive end is easily subjected to strong force and the screen plate wear is increased. Currently, the main solutions to overload and blockage problems include: using overload-severable nylon rod pins to connect the screen shaft and the drive end, and using electrical devices to reverse the motor when overloaded. However, all of these measures will cause the cross screen to stop operating, interrupting the production process. Summary of the Invention
[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a heteroaxial combined cross screen assembly, which can help enhance material disturbance, prevent pile-up, automatically remove large pieces of gangue from getting stuck, and prevent screen shaft overload.
[0005] Technical solution: To achieve the above purpose, the technical solution adopted by this utility model is:
[0006] A heteroaxial combined cross screen assembly comprises a group of disc screen plates and a group of gate-type screen plates, the disc screen plates and the gate-type screen plates are staggered and parallel in position; the disc screen plates and the gate-type screen plates are evenly sleeved and installed with disc screen plates in the middle, the disc screen plates are of uniform tooth-shaped plate structure, and each tooth surface is solid; the gate-type screen plates are evenly sleeved and installed with gate-type screen plates in the middle, the gate-type screen plates are of uniform tooth-shaped plate structure, and the center of each tooth surface is hollow; the number of teeth on the disc screen plates is not equal to the number of teeth on the gate-type screen plates; on adjacent disc screen plates and gate-type screen plates, the disc screen plates and the gate-type screen plates are staggered and spaced in the axial direction.
[0007] The heteroaxial combined cross-screen assembly provided in this case operates by rotating the screen shafts through a transmission device. The gaps between adjacent screen shafts and screen plates form screen holes. Material smaller than the screen holes passes through the screen holes under the action of its own weight and the rotational force of the screen shafts, becoming the undersize material. Material larger than the screen holes is pushed forward along the screen surface by the screen plates, becoming the oversize material. When material larger than the screen hole size becomes stuck between the disc screen plates, the gate-type screen plates can pick out or carry away the stuck material due to the phase difference caused by the unequal number of teeth. When the stuck material is located between the gate-type screen plate and the disc screen plate, the gate-type screen plate, due to its material and shape, will undergo lateral elastic deformation under the action of the extrusion pressure, increasing the distance from the fixed toothed screen plate on one side and causing the material to fall under the screen. Therefore, the heteroaxial combined cross-screen provided in this case can help enhance material disturbance, prevent pile-up, and automatically remove large pieces of gangue from getting stuck, preventing screen shaft overload.
[0008] Specifically, the middle section of the disc screen shaft is a chamfered square, and a chamfered square hole is opened in the center of the disc screen. The chamfered square hole is matched with the chamfered square in the middle of the disc screen shaft; the middle section of the gate-type screen shaft is a chamfered square, and a chamfered square hole is opened in the center of the gate-type screen. The chamfered square hole is matched with the chamfered square in the middle of the gate-type screen shaft. Only one matching method is provided here, which is the preferred solution considering that the chamfered square is easier to process and assemble; in the actual production and assembly process, other methods can also be used, such as keyway matching, pin matching, etc., as long as a fixed connection between the screen and the screen shaft can be achieved.
[0009] Specifically, the disc-type sieve shaft has cylindrical ends and is equipped with bearing pads (1), which connect the disc-type sieve shaft to the sliding bearing assembly via bearing pads (1). The gate-type sieve shaft has cylindrical ends and is equipped with bearing pads (2), which connect the gate-type sieve shaft to the sliding bearing assembly via bearing pads (2). Similar to the prior art, both ends of the sieve shaft can be mounted via the sliding bearing assembly, facilitating free rotation of the sieve shaft. To achieve effective connection with the sliding bearing assembly, installing bearing pads at the ends of the sieve shaft significantly reduces the requirements for standard components.
[0010] Specifically, the shape and size of each tooth on the disc screen are the same; the shape and size of each tooth on the gate-type screen are the same. This case requires a phase difference between the teeth on two adjacent screen shafts and a certain degree of deformation due to the hollowing of the gate-type screen. Therefore, the shape requirements for the teeth on the screen are relatively low. However, considering that the processing difficulty should be minimized and the uncontrollable factors generated during the screening process should be minimized, the shape of each tooth is designed to be the same; the shape of the teeth on the screen is a trapezoidal structure with a narrow tooth tip and an enlarged tooth root.
[0011] Specifically, the door-shaped screen comprises a central hole column and a set of toothed door frame structures fixed to the central hole column, forming a uniform toothed sheet structure. Generally speaking, the door-shaped screen required in this case can be produced by machining holes in sheet material. However, this structure requires identical materials for all parts, making it difficult to balance the hardness of the center section with the elasticity of the door frame. Therefore, a modular design was designed, allowing for the selection of different materials for processing based on different functions.
[0012] Specifically, the toothed door frame structure is welded to the central hole column. In addition to welding as recommended in this case, other fixing methods such as threaded structures can also be used.
[0013] Specifically, the gate-shaped screen comprises a central hole column and a set of toothed doorframe structures. The toothed doorframe structures are formed by bending strips to form a hollow gate-shaped structure. The toothed doorframe structures are fixed to the central hole column, forming a uniform toothed sheet structure. This design is a superior solution selected through multiple experimental verifications. The central hole column is used to connect the gate-shaped screen shaft and fix the toothed doorframe structure. The toothed doorframe structure is formed by bending one or more strips. Bending is a relatively easy product processing method, and the strips that can be bent have a certain degree of toughness, which can meet the elasticity requirements.
[0014] Specifically, the gate-shaped screen plate comprises a central hole column and a set of tooth-shaped door frame structures. The tooth-shaped door frame structures are formed by bending circular spring steel bars to form a hollow gate-shaped structure. The tooth-shaped door frame structures are fixed to the central hole column to form a uniform tooth-shaped plate structure. This design is a relatively excellent specific solution selected through multiple experimental verifications. The toughness of the folded circular spring steel bars can meet the elastic requirements, while its original cross-section reduces the resistance to material flow. In this design, a single circular spring steel bar is used to form the shape of all the tooth-shaped door frame structures on the same gate-shaped screen plate. The root of each tooth is spot welded to the central hole column.
[0015] Specifically, it also includes a sliding bearing assembly, side panels, a feed plate, and a discharge port. The disc and gate screen shafts are mounted on the side panels at both ends via sliding bearing assemblies. The disc and gate screen shafts form the screen surface. The feed plate and discharge port are mounted on both ends of the side panels, with the feed plate positioned above the screen surface and the discharge port below. In this scheme, material enters through the feed plate, flows into the screen surface, and eventually large particles fall through the discharge port for discharge.
[0016] Specifically, the two outermost screen shafts on the side plate are disc-type screen shafts located on the side of the feed plate, and gate-type screen shafts located on the side of the discharge port.
[0017] Beneficial effects: The heteroaxial combined cross screen assembly provided by the utility model adopts an arrangement in which two adjacent two shafts adopt a disc screen plate screen shaft and a gate screen plate screen shaft arranged in an alternating manner, and the number of hollow gate screen teeth is not equal to the number of solid screen teeth of adjacent shafts; when materials larger than the screen hole size are stuck between the disc screen plates, the gate screen plates can pick out or carry away the stuck materials due to the phase difference caused by the unequal number of teeth; when the stuck materials are located between the gate screen plates and the disc screen plates, due to the material and shape of the gate screen plates, they will undergo lateral elastic deformation under the action of the extrusion force, expand the distance with the fixed toothed screen plates on one side, and make the materials fall under the screen; the heteroaxial combined cross screen provided in this case can help to enhance material disturbance, prevent material piling, and automatically remove large pieces of gangue from getting stuck, thereby preventing the screen shaft from overloading. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the heteroaxial combined cross screen based on the utility model;
[0019] Figure 2 This is a schematic diagram of the arrangement of the middle disc screen and the gate type screen along the length direction of the side plate of the utility model;
[0020] Figure 3 It is a schematic diagram of the arrangement of the middle disc type screen plate and screen shaft and the gate type screen plate and screen shaft of the utility model;
[0021] Figure 4 It is a schematic diagram of the arrangement of the middle disc type screen plate and screen shaft and the gate type screen plate and screen shaft of the utility model;
[0022] Figure 5 This is a schematic diagram of the end structure of the middle disc screen shaft and the gate type screen shaft of the utility model;
[0023] Figure 6 This is a schematic diagram of the structure of the middle disc screen of the utility model;
[0024] Figure 7 This is a schematic diagram of the structure of the middle door type screen of the utility model;
[0025] The figure includes: 1-disc screen plate and screen shaft; 2-door-type screen plate and screen shaft; 3-sliding bearing group; 4-side plate; 5-feed plate; 6-discharge port; 1-1-bearing shell 1; 2-1-bearing shell 2; 1-2-disc screen plate; 2-2-door-type screen plate; 1-3-cornered square hole 1; 2-3-cornered square hole 2. DETAILED DESCRIPTION
[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] like Figure 1The figure shows a heteroaxial combined cross screen, comprising a group of disc screen shafts 1, a group of gate-type screen shafts 2, a sliding bearing group 3, a pair of side plates 4, a feed plate 5 and a discharge port 6; the two ends of the disc screen shafts 1 and the gate-type screen shafts 2 are mounted on the side plates 4 through the sliding bearing group 3, and all the disc screen shafts 1 and the gate-type screen shafts 2 form a screen surface, and the feed plate 5 and the discharge port 6 are respectively mounted at the two ends of the side plates 4, the feed plate 5 is located above the screen surface, and the discharge port 6 is located below the screen surface; on the side plates 4, the two outermost screen shafts, the disc screen shaft 1 is located on the side of the feed plate 5, and the gate-type screen shaft 2 is located on the side of the discharge port 6.
[0028] like Figure 2 、 Figure 3 、 Figure 4 As shown, the disc screen plate sieve shaft 1 and the gate-type screen plate sieve shaft 2 are staggered and parallel in position; the disc screen plate sieve shaft 1 is evenly sleeved and installed with a disc screen plate 1-2 in the middle, and the disc screen plate 1-2 is a uniformly toothed plate structure, and each tooth surface is solid; the gate-type screen plate sieve shaft 2 is evenly sleeved and installed with a gate-type screen plate 2-2 in the middle, and the gate-type screen plate 2-2 is a uniformly toothed plate structure, and the center of each tooth surface is hollow; the number of teeth on the disc screen plate 1-2 is not equal to the number of teeth on the gate-type screen plate 2-2; on the adjacent disc screen plate sieve shaft 1 and gate-type screen plate sieve shaft 2, the disc screen plate 1-2 and the gate-type screen plate 2-2 are staggered and spaced in the axial direction.
[0029] like Figure 5 、 Figure 6 、 Figure 7 As shown, the disc sieve shaft 1 is cylindrical at both ends and is provided with bearing bushes 1-1, through which the disc sieve shaft 1 is connected to the sliding bearing group 3. The gate sieve shaft 2 is cylindrical at both ends and is provided with bearing bushes 2-1, through which the gate sieve shaft 2 is connected to the sliding bearing group 3. The disc sieve shaft 1 has a square cross-section at its center, and the disc sieve 1-2 has a square hole 1-3 at its center, which matches the square cross-section at the center of the disc sieve shaft 1. The gate sieve shaft 2 has a square cross-section at its center, and has a square hole 2-3 at its center, which matches the square cross-section at the center of the gate sieve shaft 2.
[0030] like Figure 6 As shown, the teeth on the disc screen 1-2 have the same shape and size, including a central hole column and a tooth piece, the central hole column is set on the outside of the cut-corner square hole 1-3, and the tooth piece is fixed on the outside of the central hole column. The tooth piece is cast or cut. Figure 7As shown, the teeth on the door-shaped screen plate 2-2 have the same shape and size, including a central hole column and a group of tooth-shaped door frame structures. The tooth-shaped door frame structure is formed by bending a circular spring steel bar to form a hollow door-shaped structure. The central hole column is mounted on the outside of the cut-angle square hole 2-3. Each door frame structure is formed by bending a section of circular spring steel bar and fixed on the side of the central hole column. The tooth-shaped door frame structure is fixed on the central hole column to form a uniform tooth-shaped sheet structure.
[0031] The heteroaxial combined cross screen provided in this case, when in operation, the motor drives the rotation of each screen shaft of the cross screen through the transmission device, and the gap between the adjacent screen shafts and the screen plates forms a screen hole. The material smaller than the screen hole passes through the screen hole under the action of its own weight and the rotational force of the screen shaft and becomes the under-sieve material, while the material larger than the screen hole is pushed by the screen plate and continues to move forward along the screen surface to become the over-sieve material. Due to the phase difference caused by the unequal number of teeth of the gate-type screen plate 2-2 and the number of teeth of the adjacent screen shaft disc-type screen plate 2-1, the teeth of the gate-type screen plate 2-2 can clear the blockage between the screen plates, and the unevenness of the adjacent screen plates caused by the phase difference will cause the material to be pushed up and down, so that the cross screen can withstand greater turning strength and prevent pile-up. Due to the material and shape of the gate-type screen plate 2-2, it will undergo lateral elastic deformation under the action of the extrusion pressure, expanding the distance with the adjacent side disc-type screen plate 2-1, causing the material to fall under the sieve, so that the cross screen can withstand greater turning strength and prevent pile-up.
[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the scope of protection of the present invention.
Claims
1. A heteroaxial combined cross screen assembly, characterized by: The invention comprises a set of disc-type sieve plate sieve shafts (1) and a set of gate-type sieve plate sieve shafts (2), wherein the disc-type sieve plate sieve shafts (1) and the gate-type sieve plate sieve shafts (2) are staggered and parallel in position; the disc-type sieve plate sieve shafts (1) are evenly sleeved and installed with disc-type sieve plates (1-2) in the middle, the disc-type sieve plates (1-2) are of uniform tooth-shaped plate structure, and each tooth surface is solid; the gate-type sieve plate sieve shafts (2) are evenly sleeved and installed with gate-type sieve plates (2-2) in the middle, the gate-type sieve plates (2-2) are of uniform tooth-shaped plate structure, and each tooth surface is hollowed out in the center; the number of teeth on the disc-type sieve plate (1-2) is not equal to the number of teeth on the gate-type sieve plate (2-2); on adjacent disc-type sieve plate sieve shafts (1) and gate-type sieve plate sieve shafts (2), the disc-type sieve plates (1-2) and the gate-type sieve plates (2-2) are staggered and spaced in the axial direction.
2. The heteroaxial combined cross screen assembly according to claim 1, characterized in that: The middle section of the disc-type screen plate sieve shaft (1) is a square cut corner, and the disc-type screen plate (1-2) is provided with a square cut corner hole (1-3) at the center, and the square cut corner hole (1-3) is adapted to the square cut corner in the middle section of the disc-type screen plate sieve shaft (1); the middle section of the gate-type screen plate sieve shaft (2) is a square cut corner, and the gate-type screen plate (2-2) is provided with a square cut corner hole (2-3) at the center, and the square cut corner hole (2-3) is adapted to the square cut corner in the middle section of the gate-type screen plate sieve shaft (2).
3. The heteroaxial combined cross screen assembly according to claim 1, characterized in that: Both ends of the disc-type screen plate sieve shaft (1) are cylindrical and are provided with bearing bushes 1 (1-1). The disc-type screen plate sieve shaft (1) is connected to the sliding bearing group (3) via the bearing bushes 1 (1-1). Both ends of the gate-type screen plate sieve shaft (2) are cylindrical and are provided with bearing bushes 2 (2-1). The gate-type screen plate sieve shaft (2) is connected to the sliding bearing group (3) via the bearing bushes 2 (2-1).
4. The heteroaxial combined cross screen assembly according to claim 1, characterized in that: The shapes and sizes of the teeth on the disc-type screen plate (1-2) are the same; the shapes and sizes of the teeth on the gate-type screen plate (2-2) are the same.
5. The heteroaxial combined cross screen assembly according to claim 1, characterized in that: The door-shaped screen plate (2-2) comprises a central hole column and a group of tooth-shaped door frame structures, wherein the tooth-shaped door frame structures are fixed on the central hole column to form a uniform tooth-shaped plate structure.
6. The heteroaxial combined cross screen assembly according to claim 5, characterized in that: The tooth-shaped door frame structure is welded on the central hole column.
7. The heteroaxial combined cross screen assembly according to claim 1, characterized in that: The door-shaped screen plate (2-2) comprises a central hole column and a set of tooth-shaped door frame structures, wherein the tooth-shaped door frame structure is formed by bending a strip to form a hollow door-shaped structure; the tooth-shaped door frame structure is fixed on the central hole column to form a uniform tooth-shaped plate structure.
8. The heteroaxial combined cross screen assembly according to claim 1, characterized in that: The door-shaped screen plate (2-2) comprises a central hole column and a set of tooth-shaped door frame structures, wherein the tooth-shaped door frame structure is formed by bending a circular spring steel bar to form a hollow door-shaped structure; the tooth-shaped door frame structure is fixed on the central hole column to form a uniform tooth-shaped plate structure.
9. The heteroaxial combined cross screen assembly according to claim 1, characterized in that: The invention also includes a sliding bearing group (3), a side plate (4), a feed plate (5) and a discharge port (6), wherein both ends of the disc-type screen plate sieve shaft (1) and the gate-type screen plate sieve shaft (2) are mounted on the side plate (4) through the sliding bearing group (3), and all the disc-type screen plate sieve shafts (1) and the gate-type screen plate sieve shafts (2) form a screen surface, and the feed plate (5) and the discharge port (6) are respectively mounted on both ends of the side plate (4), the feed plate (5) is located above the screen surface, and the discharge port (6) is located below the screen surface.
10. The heteroaxial combined cross screen assembly according to claim 9, characterized in that: On the side plate (4), the two outermost screen shafts are a disc-type screen shaft (1) located on the side of the feed plate (5), and a gate-type screen shaft (2) located on the side of the discharge port (6).