Cut-off type wear-resistant conical cylinder structure of cyclone dust collector

Abstract

The utility model belongs to the technical field of cyclone dust collectors, and particularly relates to a cut-off type wear-resistant conical cylinder structure of a cyclone dust collector, which comprises an upper conical cylinder body and a lower conical cylinder body which are coaxially arranged up and down, a ceramic wear-resistant layer is adhered to the inner wall of the lower cone cylinder, and the surface of the ceramic wear-resistant layer is smooth; the upper cone cylinder and the lower cone cylinder are connected through a second flange structure to form a detachable and separable complete cone cylinder structure, and the bottom of the lower cone cylinder is connected with a discharging valve through a first flange structure. According to the technical scheme, the problems that a traditional conical cylinder is prone to abrasion, troublesome to replace and difficult to maintain are solved, and practicability and economical efficiency are both achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of cyclone dust collectors, specifically relating to a cut-off anti-wear cone structure for a cyclone dust collector. Background Technology

[0002] During the production and processing of polysilicon, a large amount of polysilicon dust is generated. If this dust is not effectively treated, it will not only pollute the production environment and endanger the health of workers, but may also adversely affect subsequent production processes. Therefore, dust removal is a crucial step in polysilicon production. Cyclone dust collectors, as a commonly used dust removal device, are widely used in polysilicon dust removal systems due to their simple structure, low operating costs, and high processing efficiency.

[0003] The working principle of a cyclone dust collector is to utilize the centrifugal force generated by the rotation of the dust-laden airflow to separate the dust from the airflow. After the dust-laden airflow enters the cyclone dust collector, it moves downwards in a spiral motion along the inner wall of the cylinder. Under the action of centrifugal force, the dust is thrown against the cylinder wall and falls down the cylinder wall to the cone section, and finally discharged from the dust outlet. In this process, the lower part of the cone is the main area for dust accumulation and movement. Because silicon dust has a certain degree of hardness, under the action of long-term high-speed movement and friction, the lower part of the cone is often worn through by the hard silicon dust.

[0004] Currently, the cone structure of existing cyclone dust collectors is usually a single, integral unit. When the lower part of the cone is worn through, the entire cone needs to be replaced. This replacement method not only consumes a lot of time and manpower, increasing replacement costs, but also, because the cone is a single unit, it is inconvenient to inspect the wear condition inside the cone during routine maintenance. Often, the cone needs to be disassembled for detailed inspection, which undoubtedly further increases the difficulty and cost of maintenance. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by proposing a cut-off anti-wear cone structure for a cyclone dust collector, so as to solve the problems of easy wear at the bottom of the cone, high replacement cost, and inconvenience in inspecting the internal wear.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A truncated wear-resistant cone structure for a cyclone dust collector includes an upper cone body and a lower cone body arranged coaxially. A ceramic wear-resistant layer is adhered to the inner wall of the lower cone body, and the surface of the ceramic wear-resistant layer is smooth. The upper cone body and the lower cone body are connected by a second flange structure to form a detachable and separable complete cone structure. The bottom of the lower cone body is connected to a discharge valve through a first flange structure.

[0008] Preferably, the ceramic wear-resistant layer is formed by smoothly splicing together several ceramic sheets, and the splicing gap between adjacent ceramic sheets is less than 1 mm.

[0009] Preferably, the lower cone body includes an integrally formed connecting part, an expanded diameter buffer part, and an expanded diameter cone body part, wherein the expanded diameter buffer part has a circular ring structure; the connecting part is cylindrical and connects to the inner circle of the expanded diameter buffer part, and is used to set the second flange structure; the expanded diameter cone body part connects to the outer circle of the expanded diameter buffer part, and the first flange structure is set at its bottom.

[0010] Preferably, the ceramic sheet on the inner wall of the connecting part is rectangular, and its length is consistent with the height of the connecting part.

[0011] Preferably, the ceramic sheet on the inner wall of the expanded diameter buffer section has a fan-shaped ring structure or a circular ring structure.

[0012] Preferably, the ceramic sheet on the inner wall of the expanded vertebral body has an isosceles trapezoidal structure.

[0013] Preferably, at the connection between the upper and lower cone bodies, the inner diameter of the upper cone body is less than or equal to the inner diameter of the ceramic wear-resistant layer.

[0014] Preferably, at the connection between the lower cone body and the unloading valve, the inner diameter of the ceramic wear-resistant layer is smaller than the inner diameter of the first flange structure.

[0015] This technical solution has the following beneficial effects:

[0016] 1) Easier maintenance. The structure is divided into upper and lower sections and can be disassembled. During maintenance, only the lower cone body needs to be removed, without replacing the entire cone. This greatly reduces the difficulty of transportation and shortens the maintenance time. It is especially suitable for high-altitude installation scenarios. Routine inspections also do not require complete disassembly, reducing maintenance costs.

[0017] 2) More wear-resistant and durable. The inner wall of the lower cone is bonded with a high-hardness ceramic anti-wear layer. The surface is smooth and the splicing gap is small (<1mm). Utilizing the high hardness of ceramic materials, the dust wear rate is significantly reduced, the service life of the cone is extended, and the frequency of maintenance such as welding is reduced. At the same time, the smooth inner lining reduces airflow resistance and optimizes fan energy consumption.

[0018] 3) More flexible and practical structure. The modular design allows for flexible adjustment of the cone size to adapt to different air volume requirements; the flange interface adopts a universal standard and can be directly connected to mainstream unloading valves for convenient installation; the expanded diameter buffer structure (expanded diameter cone part) reduces wind speed, promotes dust settling and collection, and improves dust removal efficiency.

[0019] 4) Higher cost-effectiveness. Although the initial cost is slightly higher, the total life cycle cost is significantly reduced by extending the lifespan, reducing maintenance and energy consumption, making it especially suitable for high-wear conditions; the optimized inner diameter design of the connection reduces the erosion and wear of dust on the interface and unloading valve, protecting related components. Attached Figure Description

[0020] Figure 1 A simplified diagram of the cone structure of a cyclone dust collector, representing the first preferred structure.

[0021] Figure 2 A simplified diagram of the cone structure of a cyclone dust collector, representing the second preferred structure.

[0022] Figure 3 A simplified diagram of the cone structure of a cyclone dust collector, representing the third preferred structure.

[0023] Figure 4 This is a simplified diagram of the existing cyclone dust collector cone structure.

[0024] In the picture:

[0025] 1. Upper conical body; 2. Lower conical body; 2.1. Connecting part; 2.2. Expanded diameter buffer part; 2.3. Expanded diameter conical body part; 3. Ceramic wear-resistant layer; 4. Second flange structure; 5. Integrated conical body; 6. First flange structure. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments.

[0027] Therefore, the following detailed description of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] This embodiment discloses a cut-off anti-wear cone structure for a cyclone dust collector, as a preferred implementation of this technical solution, such as... Figure 1 As shown, it includes an upper conical body 1 and a lower conical body 2 arranged coaxially; a ceramic anti-wear layer 3 is pasted on the inner wall of the lower conical body 2, and the surface of the ceramic anti-wear layer 3 is smooth; the upper conical body 1 and the lower conical body 2 are connected by a second flange structure 4 to form a complete conical structure that can be detached and separated, and the bottom of the lower conical body 2 is connected to a discharge valve through a first flange structure 6.

[0030] The second flange structure 4 may include an upper connecting flange located at the lower end of the upper conical body 1 and a lower connecting flange located at the upper end of the lower conical body 2. The connecting surfaces of both the upper and lower connecting flanges are machined with annular positioning bosses and grooves. The convex-concave fit achieves coaxial positioning of the upper conical body 1 and the lower conical body 2, and the mechanical fit forms a physical constraint, eliminating the potential airflow vortex hazard caused by eccentricity from a structural design perspective. Simultaneously, bolt through holes are evenly distributed circumferentially on both the upper and lower connecting flanges, and high-strength bolt sets are used to achieve a detachable and tightly fitted connection.

[0031] Compared to Figure 4 The existing cyclone dust collector cone structure shown (the integrated cone 5 is connected to the discharge valve via the first flange structure 6 at its bottom) adopts a truncated structure design with an upper cone body 1 and a lower cone body 2, which facilitates the disassembly and assembly of the lower cone body 2, making it easier to replace and conduct routine internal inspections. In practical applications, the truncated position can be determined based on the overall dimensions of the cyclone dust collector cone and experience; for example, the axial dimension of the truncated lower cone body 2 can be set to 800mm~1000mm.

[0032] Therefore, this technical solution has the following advantages:

[0033] 1) Improved maintenance convenience. The two-section structure allows the lower cone body 2 to be disassembled independently. Compared with the one-piece cone body 5, it significantly reduces the weight of a single unit, reduces the difficulty of handling, and is especially suitable for high-altitude installation scenarios, greatly shortening maintenance time and reducing downtime losses.

[0034] 2) Improved wear resistance. The ceramic wear-resistant layer 3 utilizes the high hardness of ceramic materials to significantly reduce the wear rate of the lower cone body 2, extending its service life and eliminating the need for regular welding repairs, thus reducing maintenance frequency. The ceramic wear-resistant layer 3 also smooths the inner lining while reducing airflow resistance, optimizing fan energy consumption.

[0035] 3) Structural adaptability optimization. The modular segmented design supports flexible configuration of cone size to adapt to different air volume requirements, and allows the flange connection surface to adopt a universal standard, enabling immediate use with mainstream unloading valves and significantly shortening the installation cycle.

[0036] 4) Significant economic advantages. Although the initial manufacturing cost is slightly higher, the total life cycle cost is significantly reduced by extending the service life, reducing the frequency of maintenance and lowering energy consumption. It is especially suitable for high-wear conditions, with a short investment payback period and outstanding overall economic benefits.

[0037] Example 2

[0038] This embodiment discloses a cut-off anti-wear cone structure for a cyclone dust collector. As a preferred implementation of this technical solution, based on embodiment 1, the structure of the ceramic anti-wear layer 3 is further determined. Specifically, the ceramic anti-wear layer 3 is composed of several ceramic sheets that are smoothly spliced ​​together, and the splicing gap between adjacent ceramic sheets is less than 1 mm.

[0039] The ceramic sheet can be made of high-hardness alumina ceramic sheet. It is fully bonded to the base material of the lower cone body 2 with a high-temperature resistant adhesive. After the adhesive is cured, the joint of the ceramic sheet is ground smooth to reduce the surface roughness of the entire ceramic wear-resistant layer 3 and form a continuous and smooth wear-resistant liner.

[0040] The shape of the ceramic plate is set according to the shape of the lower conical cylinder 2. For example... Figure 1 As shown, when the lower cone-shaped body 2 is conical in shape, the ceramic wear-resistant layer 3 can be uniformly constructed using rectangular or trapezoidal ceramic sheets. Given the upper-wide, narrow, and curved structure of the lower cone-shaped body 2, trapezoidal ceramic sheets are preferred over rectangular ones. This is due to the geometric matching mechanism of the conical surface and gap control.

[0041] Conical surface geometric matching mechanism: The conical surface of the lower conical cylinder 2 is essentially a quadratic surface development structure. The two hypotenuses of the trapezoidal ceramic sheet maintain a fixed angle with the generatrix of the conical cylinder, and surface fitting is achieved through the principle of similar triangles. As the width of the base of the trapezoidal ceramic sheet decreases with the radial dimension of the lower conical cylinder 2 (wider at the top and narrower at the bottom structure), the slope change in its height direction is consistent with the slope of the generatrix of the lower conical cylinder 2, ensuring that the angle between the mating surface of each ceramic sheet and the normal of the inner wall of the lower conical cylinder 2 is ≤5°, thereby forming a continuous and smooth wear-resistant surface in three-dimensional space.

[0042] Gap Control Principle: A weakness in the splicing design of ceramic sheets lies in the fact that the splicing gaps may be abraded by silicon dust. The adhesive in the splicing gaps may also be eroded by the silicon dust, causing the ceramic sheet to gyrate, which in turn leads to wear of the ceramic anti-wear layer 3. A splicing gap of ≤1mm is one way to overcome this weakness. In addition, reducing the number of splicing gaps can also overcome this weakness. Compared to rectangular ceramic sheets, trapezoidal ceramic sheets can be set relatively larger in size while still meeting the requirements of a splicing gap of ≤1mm and continuous smoothness, thereby reducing the number of splicing gaps.

[0043] Example 3

[0044] This embodiment discloses a truncated anti-wear cone structure for a cyclone dust collector. As a preferred embodiment of this technical solution, the difference from embodiments 1 and 2 is that the lower cone body 2 is enlarged. Specifically, the lower cone body 2 includes an integrally formed connecting part 2.1, an enlarged buffer part 2.2, and an enlarged cone body part 2.3. The enlarged buffer part 2.2 has a circular ring structure; the connecting part 2.1 is cylindrical and connects to the inner circle of the enlarged buffer part 2.2, and is used to set the second flange structure 4; the enlarged cone body part 2.3 connects to the outer circle of the enlarged buffer part 2.2, and the first flange structure 6 is set at its bottom.

[0045] Based on the above structure, in practical applications, the inner diameter of the lower conical body 2 at its maximum expansion point is approximately twice the inner diameter of the bottom port of the upper conical body 1 (i.e., when the inner diameter of the bottom port of the upper conical body 1 is d1, the inner diameter of the connecting part 2.1 of the lower conical body 2 is d1, and the inner diameter of the upper end of the expanded conical body 2.3 of the lower conical body 2 is twice d1). The cyclone enters the expansion zone (inside the expanded conical body 2.3) from the upper conical body 1 through the connecting part 2.1 of the lower conical body 2, undergoes three spatial changes, and the cyclone velocity decreases, facilitating the settling and collection of silicon dust.

[0046] Example 4

[0047] This embodiment discloses a truncated wear-resistant conical structure for a cyclone dust collector. As a preferred implementation of this technical solution, it defines the structure of the ceramic plates within the lower conical body 2 of Embodiment 3. Specifically:

[0048] The ceramic sheet on the inner wall of the connecting part 2.1 is rectangular. The length of the rectangular ceramic sheet is the same as the height of the connecting part 2.1; the width is set according to experience, and needs to meet the comprehensive requirements of continuous smoothness, few splicing gaps, and splicing gaps ≤1mm.

[0049] Furthermore, the ceramic sheet on the inner wall of the expanded diameter buffer section 2.2 has a fan-shaped ring structure or a circular ring structure. The ceramic sheet face downwards, so the splicing gap is less likely to be polished by silicon dust. One or both of the fan-shaped ring structure and the circular ring structure can be chosen according to convenience.

[0050] Furthermore, the ceramic plates on the inner wall of the expanded vertebral body 2.3 have an isosceles trapezoidal structure, as can be seen in the corresponding setting in Example 2.

[0051] Example 5

[0052] This embodiment discloses a truncated anti-wear cone structure for a cyclone dust collector, which is a preferred implementation of this technical solution. The difference between this embodiment and embodiments 1-4 is that: [Comparison] Figure 1 and Figure 2 At position A, Figure 2At the connection between the upper conical body 1 and the lower conical body 2, the inner diameter of the upper conical body 1 is less than or equal to the inner diameter of the ceramic anti-wear layer 3. This allows the airflow to enter the lower conical body 2 smoothly, reducing the scouring of the silicon dust at the connection point.

[0053] Example 6

[0054] This embodiment discloses a truncated wear-resistant cone structure for a cyclone dust collector, which is a preferred implementation of this technical solution. The difference between this embodiment and embodiments 1-5 is that: Figure 1 and Figure 2 As shown at position B, at the connection between the lower cone body 2 and the unloading valve, the inner diameter of the ceramic anti-wear layer 3 is smaller than the inner diameter of the first flange structure 6, which can reduce the wear on the unloading valve when silicon dust falls.

Claims

1. A truncated abrasion resistant cone structure for a cyclone separator, characterized by: It includes an upper conical body (1) and a lower conical body (2) arranged coaxially; a ceramic anti-wear layer (3) is pasted on the inner wall of the lower conical body (2), and the surface of the ceramic anti-wear layer (3) is smooth; the upper conical body (1) and the lower conical body (2) are connected by a second flange structure (4) to form a complete conical structure that can be detached and separated, and the bottom of the lower conical body (2) is connected to a discharge valve through a first flange structure (6).

2. The truncated abrasion resistant cone structure for a cyclone separator according to claim 1, wherein: The ceramic wear-resistant layer (3) is composed of several ceramic pieces that are smoothly spliced ​​together, and the splicing gap between adjacent ceramic pieces is less than 1 mm.

3. The truncated wear-resistant cone structure of a cyclone dust collector as described in claim 2, characterized in that: The lower cone body (2) includes an integrally formed connecting part (2.1), an expanded diameter buffer part (2.2), and an expanded diameter cone body part (2.3), wherein the expanded diameter buffer part (2.2) is a ring structure; the connecting part (2.1) is cylindrical and connects to the inner circle of the expanded diameter buffer part (2.2) for setting the second flange structure (4); the expanded diameter cone body part (2.3) connects to the outer circle of the expanded diameter buffer part (2.2), and the first flange structure (6) is set at its bottom.

4. The truncated wear-resistant cone structure of a cyclone dust collector as described in claim 3, characterized in that: The ceramic sheet on the inner wall of the connecting part (2.1) is rectangular, and its length is consistent with the height of the connecting part (2.1).

5. The truncated wear-resistant cone structure of a cyclone dust collector as described in claim 3, characterized in that: The ceramic plates on the inner wall of the expanded diameter buffer section (2.2) are in the form of a fan-shaped ring structure or a circular ring structure.

6. The truncated wear-resistant cone structure of a cyclone dust collector as described in claim 3, characterized in that: The ceramic pieces on the inner wall of the expanded vertebral body (2.3) have an isosceles trapezoidal structure.

7. The truncated wear-resistant cone structure of a cyclone dust collector as described in claim 1, characterized in that: At the connection between the upper vertebral body (1) and the lower vertebral body (2), the inner diameter of the upper vertebral body (1) is less than or equal to the inner diameter of the ceramic wear-resistant layer (3).

8. The truncated wear-resistant cone structure of a cyclone dust collector as described in claim 1, characterized in that: At the connection between the lower cone body (2) and the unloading valve, the inner diameter of the ceramic anti-wear layer (3) is smaller than the inner diameter of the first flange structure (6).

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