A suspended self-cleaning composite screen and a processing method thereof

Abstract

The present application relates to the technical fields of screening devices, and particularly relates to a suspended self-cleaning composite screen and a processing method thereof. The composite screen comprises a screen body, the body comprises a plurality of screen assemblies arranged in a stepped downward slope, the screen assembly comprises a screening structure, the screening structure comprises a plurality of parallel strip-shaped screen bars, the inside of the screen bar is provided with a framework, the periphery of the framework is provided with a polyurethane layer, and the surface of the polyurethane layer is embedded with wear-resistant parts; the front end of the screening structure is connected with a hook plate suspension structure, the hook plate suspension structure is used to be connected with a bracket beam on the screen plate; the bottom of the rear end of the screening structure is connected with a self-cleaning structure, the self-cleaning structure is suspended and overlapped above the front end of the next screen assembly, and the hook plate suspension structure and the self-cleaning structure are formed by polyurethane pouring. The present application has the beneficial effects of excellent corrosion resistance and high service life, and the screening structure, the hook plate suspension structure and the self-cleaning structure are integrated structures and are not easy to separate.

Description

Technical Field

[0001] This invention relates to the field of screening equipment technology, specifically to a suspended self-cleaning composite screen and its processing method. Background Technology

[0002] In the metallurgical, mining, and coal preparation industries, screening is an indispensable and crucial process. Vibrating screens are among the most commonly used screening equipment, and the screen mesh is a vital component of a vibrating screen, primarily responsible for material screening and separation. Commonly used screen mesh structures include woven mesh, perforated mesh, comb-tooth screen plates, cast screen plates, and cantilever bar screens.

[0003] Traditional screens are mostly made of metal. In recent years, due to the application of new materials and technologies, rubber polyurethane screens, which are highly wear-resistant, have a long service life, low energy consumption, and high screening efficiency, have been promoted and widely welcomed. Existing polyurethane screens are mainly formed by casting polyurethane into the outer layer of the skeleton material. The common skeleton material is steel wire rope. Cast polyurethane screens have a very high modulus of elasticity, high strength to absorb impact, and high wear resistance, thus having very high tensile strength. Their load-bearing capacity is more than 2.5 times that of rubber screens, and their service life is 8-10 times longer than that of ordinary metal screens, 3 times that of stainless steel screens, and 3.9 times that of natural rubber.

[0004] However, although polyurethane screens have good resilience, high tensile strength, and high tear strength, they also have several structural defects: First, under repeated impacts from mixed materials, such as coke, coal, and miscellaneous ores with stickiness and corrosiveness, the screen surface is easily corroded and damaged, leading to scrapping. Second, most polyurethane screens lack self-cleaning devices; the screen holes are closed, relying on the elasticity of the polyurethane itself for self-cleaning. A small number of polyurethane screens have self-cleaning devices consisting of a steel wire frame with elastic balls installed under the screen, relying on the irregular passive impact of the small balls on the screen surface to achieve a self-cleaning effect. This structure is cumbersome, and the steel wire frame has a short lifespan. Summary of the Invention

[0005] To address the technical problems of conventional polyurethane screens in the prior art, such as poor corrosion resistance and easy separation of various parts, this invention provides a suspended self-cleaning composite screen and a processing method for the suspended self-cleaning composite screen.

[0006] To achieve the above objectives, the technical solution adopted by the suspended self-cleaning composite screen in this invention is as follows:

[0007] A suspended self-cleaning composite screen includes a screen body, which comprises several screen components arranged in a stepped, downward-sloping manner. Each screen component includes a screening structure, which includes several parallel strip-shaped screen bars. The screen bars have an internal skeleton, and the skeleton is surrounded by a polyurethane layer. Wear-resistant parts are embedded on the surface of the polyurethane layer. A hook plate suspension structure is connected to the front end of the screening structure, which is used to connect with a bracket beam on the screen plate. A self-cleaning structure is connected to the bottom of the rear end of the screening structure. The self-cleaning structure is suspended and overlapped above the front end of the next screen component. The hook plate suspension structure and the self-cleaning structure are made of polyurethane casting.

[0008] With the above structural design, the surface of the screening structure comes into contact with the material, and this surface is covered with wear-resistant parts. These wear-resistant parts have a large surface area, exhibiting excellent corrosion resistance and higher wear resistance than polyurethane materials, resulting in a longer service life. This makes it more suitable for screening sticky and corrosive materials such as coke, coal, and miscellaneous ores. Through a polyurethane casting process, the screening structure, hook plate suspension structure, and self-cleaning structure of the screen assembly are cast and connected sequentially, ultimately becoming a single unit that is difficult to separate. During vibration, the self-cleaning structure remains suspended, continuously tapping the top of the front end of the next screen assembly to solve the problems of jamming and clogging. The self-cleaning structure is cast integrally with the screening structure, breaking away from the traditional design concept of independent cleaning structures such as impact tubes and elastic balls, thus reducing processing steps.

[0009] As a preferred implementation of a suspended self-cleaning composite screen, the front end of the frame extends into the hook plate suspension structure.

[0010] With the above structural design, the skeleton extends into the hook plate suspension structure. The skeleton can strengthen the structural strength of the screen assembly and enhance the connection strength between the various structures of the screen assembly, making the screen assembly less likely to fall apart.

[0011] As a preferred implementation of a suspended self-cleaning composite screen, the hook plate suspension structure includes a first connecting plate, which is vertically connected to the frame.

[0012] The above structural design can further enhance the connection strength between the frame and the hook plate suspension structure.

[0013] As a preferred implementation of a suspended self-cleaning composite screen, the bottom of the hook plate suspension structure includes a hook plate, which is arranged parallel to the screen rod and faces the self-cleaning structure. The bottom surface of the hook plate abuts against the top surface of the bracket beam, and the side of the bracket beam is connected to one side of the L-shaped connecting plate. The other side of the L-shaped connecting plate is located in the parallel gap between the hook plate and the screen rod.

[0014] With the above structural design, the hook plate suspension structure can be hooked onto the bracket beam, breaking away from the conventional bolt connection structure of traditional screens, making installation, replacement and maintenance more efficient and convenient, and with lower installation, replacement and maintenance costs.

[0015] As a preferred implementation of a suspended self-cleaning composite screen, several wear-resistant parts are provided, and these wear-resistant parts are arranged along the length of the screen bar.

[0016] By adopting the above structural design, the coverage area of ​​wear-resistant parts is increased, and the corrosion resistance of the screening structure is improved.

[0017] As a preferred implementation of a suspended self-cleaning composite screen, a second connecting plate is connected to the bottom of the rear end of each screen bar. The second connecting plate is vertically arranged and its length direction is along the length direction of the screen bar. The bottom of all the second connecting plates is connected to a third connecting plate. The third connecting plate is perpendicular to the second connecting plate and is located inside the self-cleaning structure.

[0018] By adopting the above structural scheme, the second connecting plate and the third connecting plate can enhance the connection strength between the screen rod and the self-cleaning structure.

[0019] In a preferred embodiment of a suspended self-cleaning composite screen, two adjacent second connecting plates are connected to a third connecting plate in a staggered manner.

[0020] By adopting the above structural design, the two adjacent connecting plates are staggered, which increases the gap between the two adjacent connecting plates, allowing materials to pass through, avoiding jamming, and improving screening efficiency.

[0021] In a preferred implementation of a suspended self-cleaning composite screen, the screen assembly is arranged from one side to the other, with odd-numbered second connecting plates corresponding to each other and even-numbered second connecting plates corresponding to each other.

[0022] The above structural scheme provides better structural balance for regular structures and makes it easier to control the gap between two adjacent second connecting plates.

[0023] On the other hand, the technical solution adopted in the processing method of the suspended self-cleaning composite screen in this invention is as follows:

[0024] A method for processing a suspended self-cleaning composite screen, used to manufacture any one of the suspended self-cleaning composite screens as described in claims 1-8, comprising the following processing steps:

[0025] S1. Processing the screening structure: The skeleton and wear-resistant parts are cast and vulcanized into screen bars using polyurethane material through the first mold. Several screen bars are made in the same way and arranged in parallel with the required gap.

[0026] S2. Processing self-cleaning structure: Polyurethane material is used to cast and connect the lower rear ends of several arranged screen bars into one piece to form a screen plate;

[0027] S3. Processing the hook plate suspension structure: Place the entire screen plate into the second mold, and use polyurethane material to cast the hook plate suspension structure at the front end of the screen plate to form the screen assembly.

[0028] S4. Following steps S1-S3, manufacture several screen components and arrange them at an angle downwards. The self-cleaning structure of the previous screen component is suspended and overlapped above the front end of the next screen component.

[0029] In a preferred embodiment of the processing method for a suspended self-cleaning composite screen, the frame is a steel core. Using a steel core as the frame, and with the frame extending into the hook plate suspension structure, the frame strengthens the structural strength of the screen assembly while enhancing the connection strength between the various structures within the screen assembly, making the screen assembly less prone to disintegration.

[0030] The beneficial effects of this invention include:

[0031] 1. The surface of the screening structure is in contact with the material, and the surface of the screening structure is covered with wear-resistant parts. The wear-resistant parts occupy a relatively large surface area, have excellent corrosion resistance and higher wear resistance than polyurethane materials, have a longer service life, and are more suitable for screening sticky and corrosive materials such as coke, coal, and miscellaneous ores.

[0032] 2. A steel core is used as the skeleton, and the skeleton extends into the hook plate suspension structure. The skeleton can strengthen the structural strength of the screen assembly and enhance the connection strength between the various structures of the screen assembly, making the screen assembly less likely to fall apart.

[0033] 3. Through polyurethane casting process, the screening structure, hook plate suspension structure and self-cleaning structure of the screen assembly are cast and connected in sequence, and finally become a whole, which is not easy to separate.

[0034] 4. The hook plate suspension structure can be hooked onto the bracket beam, breaking away from the conventional bolt connection structure of traditional screens, making installation, replacement and maintenance more efficient and convenient, and the cost of installation, replacement and maintenance is lower.

[0035] 5. During vibration, the screening structure is an open long strip hole at the cantilever end, which has the advantages of high screening height and less susceptibility to hole jamming of bar screens. The self-cleaning structure is always in a suspended state, constantly tapping the top of the front end of the next screen assembly, which can more thoroughly solve the problems of hole jamming and screen blockage. The self-cleaning structure and the screening structure are cast into one piece, breaking the traditional design concept of independent cleaning structures such as impact tubes and elastic balls, reducing the number of processing steps.

[0036] 6. The stepped overlapping arrangement between screen components can more effectively classify and screen materials, improving screening efficiency. The screen components can be arranged and used on most screen types such as linear vibrating screens, elliptical vibrating screens, circular vibrating screens, multi-frequency screens, and mesh vibrating screens. Attached Figure Description

[0037] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a cross-sectional view of the screen assembly in Embodiment 1 of the present invention;

[0039] Figure 2 This is a top view of the screen assembly in Embodiment 1 of the present invention;

[0040] Figure 3 This is a right-side view of the screen assembly in Embodiment 1 of the present invention.

[0041] Figure 4 This is a cross-sectional view of the screen body in Embodiment 1 of the present invention;

[0042] Figure 5 This is a schematic diagram of the cross-sectional structure of the sieve bar in Embodiment 2 of the present invention;

[0043] Figure 6 This is a schematic diagram of the cross-sectional structure of the sieve bar in Embodiment 3 of the present invention;

[0044] Figure 7 This is a top view of the sieve rod structure in Embodiment 4 of the present invention;

[0045] Figure 8 This is a right-side view of the screen assembly in Embodiment 5 of the present invention.

[0046] Figure 9 This is a top view of the screen assembly in Embodiment 6 of the present invention.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Screen body; 2. Screen assembly; 3. Screening structure; 31. Screen rod; 311. Frame; 312. Polyurethane layer; 313. Wear-resistant parts; 4. Hook plate suspension structure; 41. First connecting plate; 42. Hook plate; 5. Bracket beam; 51. L-shaped connecting plate; 6. Self-cleaning structure; 61. Second connecting plate; 62. Third connecting plate. Detailed Implementation

[0049] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0050] Example 1:

[0051] Reference Figure 1-4 This embodiment proposes a suspended self-cleaning composite screen, including a screen body 1. The body includes several screen components 2 arranged in a stepped, downward inclined manner. Each screen component 2 includes a screening structure 3, which includes several parallel strip-shaped screen rods 31. The screen rods 31 have an internal skeleton 311, and the skeleton 311 is surrounded by a polyurethane layer 312. Wear-resistant parts 313 are embedded on the surface of the polyurethane layer 312. Several wear-resistant parts 313 are provided and arranged along the length of the screen rods 31. Screening... The front end of structure 3 is connected to a hook plate suspension structure 4. The front end of the frame 311 extends into the hook plate suspension structure 4. The hook plate suspension structure 4 is used to connect with the bracket beam 5 on the screen plate. The interior of the hook plate suspension structure 4 includes a first connecting plate 41, which is perpendicularly connected to the frame 311. The bottom of the hook plate suspension structure 4 includes a hook plate 42, which is parallel to the screen rod 31 and faces the self-cleaning structure 6. The bottom surface of the hook plate 42 abuts against the top surface of the bracket beam 5, and the side of the bracket beam 5 is connected to an L-shaped structure. One side of the plate 51 is connected, and the other side of the L-shaped connecting plate 51 is located in the parallel gap between the hook plate 42 and the screen rod 31; the bottom of the rear end of the screening structure 3 is connected to a self-cleaning structure 6, which is suspended and overlapped above the front end of the next screen assembly 2. The bottom of the rear end of each screen rod 31 is connected to a second connecting plate 61. The second connecting plate 61 can be connected to the frame 311 or to the polyurethane layer 312. The second connecting plate 61 is set vertically, and its length direction is along the length direction of the screen rod 31. The bottom of all the second connecting plates 61 are connected to the third connecting plate 62. The third connecting plate 62 is set perpendicular to the second connecting plate 61 and is located inside the self-cleaning structure 6. Two adjacent second connecting plates 61 are connected to the third connecting plate 62 in a staggered manner. Specifically, from one side to the other side of the screen assembly 2, the second connecting plates 61 with odd numbers correspond to each other, and the second connecting plates 61 with even numbers correspond to each other. The hook plate suspension structure 4 and the self-cleaning structure 6 are made of polyurethane casting.

[0052] The principle of this embodiment is as follows:

[0053] First, the surface of the screening structure 3 is in contact with the material, and this surface is covered with wear-resistant parts 313. These wear-resistant parts 313 occupy a relatively large surface area, exhibiting excellent corrosion resistance and higher wear resistance than polyurethane materials, resulting in a longer service life and making them more suitable for screening sticky and corrosive materials such as coke, coal, and miscellaneous ores. Second, this embodiment uses a steel core as the skeleton 311, which extends into the hook plate suspension structure 4. The skeleton 311 strengthens the structural strength of the screen assembly 2 while enhancing the connection strength between its various structures, making the screen assembly 2 less prone to disintegration. Third, through a polyurethane casting process, the screening structure 3, hook plate suspension structure 4, and self-cleaning structure 6 of the screen assembly 2 are cast and connected sequentially, ultimately becoming a single unit that is difficult to separate. Fourth, the hook plate suspension structure 4 can hook onto the bracket beam 5, breaking away from the conventional bolted connection structure of traditional screens. This makes installation, replacement, and maintenance more efficient and convenient, while also reducing installation, replacement, and maintenance costs. Fifth, during vibration, the screening structure 3, with its cantilevered open elongated holes, possesses the advantages of high screening capacity and resistance to jamming found in bar screens. The self-cleaning structure 6 remains suspended, continuously tapping the top of the front end of the next screen assembly 2, thus more thoroughly resolving the problems of jamming and clogging. The self-cleaning structure 6 is cast integrally with the screening structure 3, breaking away from the traditional design of independent cleaning structures such as impact tubes and elastic balls, reducing processing steps. Sixth, the stepped overlapping arrangement between screen assemblies 2 enables more effective grading and screening of materials, improving screening efficiency. Screen assemblies 2 can be arranged and used on most common screen types, including linear vibrating screens, elliptical vibrating screens, circular vibrating screens, multi-frequency screens, and mesh vibrating screens.

[0054] In this embodiment, the wear-resistant part 313 can be an alumina ceramic sheet, a columnar alumina ceramic, a trapezoidal ceramic bead, or other wear-resistant and corrosion-resistant materials, such as stainless steel plates, high-chromium weld overlay plates, etc.

[0055] In this embodiment, the sieve rod 31 has a square cross-section, and the wear-resistant plate 313 is an alumina ceramic plate that covers the upper surface of the sieve rod 31.

[0056] In this embodiment, the multiple screen rods 31 in each screen assembly 2 are arranged in parallel, and have the same length and height.

[0057] Example 2:

[0058] Reference Figure 5 This embodiment proposes a suspended self-cleaning composite screen. The difference between this embodiment and embodiment 1 is that the cross-section of the screen rod 31 in this embodiment is circular, and the wear-resistant sheet 313 is wrapped around the polyurethane layer 312.

[0059] Example 3:

[0060] Reference Figure 6 This embodiment proposes a suspended self-cleaning composite screen. The difference between this embodiment and embodiment 1 is that the cross-section of the screen rod 31 in this embodiment is an inverted trapezoid, and the wear-resistant sheet 313 covers the upper surface of the screen rod 31.

[0061] Example 4:

[0062] Reference Figure 7 This embodiment proposes a suspended self-cleaning composite screen. The difference between this embodiment and embodiment 1 is that the screen rod 31 in this embodiment has a taper in the length direction, and the end of the screen rod 31 that is away from the hook plate suspension structure 4 is the small end.

[0063] Example 5:

[0064] Reference Figure 8 This embodiment proposes a suspended self-cleaning composite screen. The difference between this embodiment and embodiment 1 is that in this embodiment, several screen rods 31 in each screen assembly 2 have two heights and are arranged at different heights.

[0065] Example 6:

[0066] Reference Figure 9 This embodiment proposes a suspended self-cleaning composite screen. The difference between this embodiment and embodiment 1 is that: in this embodiment, several screen rods 31 in each screen assembly 2 have two lengths and are arranged with long and short intervals.

[0067] Example 7:

[0068] This embodiment proposes a processing method for a suspended self-cleaning composite screen, which is used to manufacture a suspended self-cleaning composite screen as described in any one of claims 1-8, and includes the following processing steps:

[0069] S1. Processing the screening structure 3: The skeleton 311 and wear-resistant parts 313 are cast and vulcanized into screen rods 31 using polyurethane material through the first mold. The skeleton 311 is a steel core. Several screen rods 31 are made in the same way and arranged in parallel with the required gap.

[0070] S2, Processing self-cleaning structure 6: Use polyurethane material to cast and connect the lower rear ends of several arranged screen bars 31 into one piece to form a screen plate;

[0071] S3. Processing the hook plate suspension structure 4: Place the entire screen plate into the second mold, and use polyurethane material to cast the hook plate suspension structure 4 at the front end of the screen plate to form the screen assembly 2.

[0072] S4. Following steps S1-S3, manufacture several screen components 2 and arrange them at an angle downwards. The self-cleaning structure 6 of the previous screen component 2 is suspended and overlapped above the front end of the next screen component 2.

[0073] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A suspended self-cleaning composite screen, comprising a screen body (1), the body comprising a plurality of screen components (2) arranged in a stepped, inclined downward arrangement, the screen components (2) comprising a screening structure (3), the screening structure (3) comprising a plurality of parallel strip-shaped screen bars (31), characterized in that, The screen rod (31) has an internal skeleton (311) with a steel core. The skeleton (311) has a polyurethane layer (312) on its outer periphery. Wear-resistant parts (313) are embedded on the surface of the polyurethane layer (312). There are several wear-resistant parts (313) arranged along the length of the screen rod (31). The skeleton (311) and the wear-resistant parts (313) are cast and vulcanized with polyurethane material to form the screen rod (31). The front end of the screening structure (3) is connected to a hook plate suspension structure (4), which is used to connect with the bracket beam (5) on the screen plate; the bottom of the rear end of the screening structure (3) is connected to a self-cleaning structure (6), which is suspended and overlapped above the front end of the next screen assembly (2). During vibration, the self-cleaning structure (6) is always in a suspended state and continuously taps the top of the front end of the next screen assembly to solve the problems of hole jamming and screen blockage; the hook plate suspension structure (4) and the self-cleaning structure (6) are cast with polyurethane; the hook plate suspension structure (4), the self-cleaning structure (6) and the screening structure (3) are cast into one piece; The bottom of the hook plate suspension structure (4) includes a hook plate (42), which is parallel to the screen rod (31). The hook plate (42) is set in the direction of the self-cleaning structure (6). The bottom surface of the hook plate (42) abuts against the top surface of the bracket beam (5). The side of the bracket beam (5) is connected to one side of the L-shaped connecting plate (51). The other side of the L-shaped connecting plate (51) is located in the parallel gap between the hook plate (42) and the screen rod (31). The front end of the frame (311) extends into the hook plate suspension structure (4); The interior of the hook plate suspension structure (4) includes a first connecting plate (41), which is perpendicularly connected to the frame (311); Each screen rod (31) has a second connecting plate (61) connected to the bottom of its rear end. The second connecting plate (61) is set vertically and its length direction is set along the length direction of the screen rod (31). The bottom of all the second connecting plates (61) is connected to the third connecting plate (62). The third connecting plate (62) is set perpendicular to the second connecting plate (61) and is located inside the self-cleaning structure (6).

2. The suspended self-cleaning composite screen according to claim 1, characterized in that, The two adjacent second connecting plates (61) are connected to the third connecting plate (62) in a staggered manner.

3. The suspended self-cleaning composite screen according to claim 2, characterized in that, Arranged from one side to the other in the screen assembly (2), the second connecting plates (61) with odd numbers correspond to each other, and the second connecting plates (61) with even numbers correspond to each other.

4. A processing method for a suspended self-cleaning composite screen, characterized in that, The method for processing and manufacturing a suspension self-cleaning composite screen as described in any one of claims 1-3 includes the following processing steps: S1. Processing the screening structure (3): The skeleton (311) and wear-resistant parts (313) are cast and vulcanized into screen rods (31) using polyurethane material through the first mold. Several screen rods (31) are made in the same way, and the several screen rods (31) are arranged in parallel with the required gap. S2, Processing self-cleaning structure (6): Use polyurethane material to cast and connect the lower rear end of several arranged screen bars (31) into one piece to form a screen plate; S3. Processing the hook plate suspension structure (4): Place the entire screen plate into the second mold and use polyurethane material to cast the hook plate suspension structure (4) at the front end of the screen plate to form the screen assembly (2). S4. Following steps S1-S3, manufacture several screen components (2), arrange the several screen components (2) at an angle downwards, and suspend the self-cleaning structure (6) of the previous screen component (2) above the front end of the next screen component (2).

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