Skirt anti-air-leakage structure of belt type vacuum filter

Abstract

The utility model relates to the technical field of industrial and mining equipment, and discloses a skirt edge air leakage prevention structure of a belt type vacuum filter, which comprises a belt type conveyor body and filter cloth with a closed head and a closed tail, the filter cloth is sleeved on a belt and is attached to the upper layer of the belt of the belt type conveyor body, a negative pressure box is fixed in a rack of the belt type conveyor body, and the negative pressure box is fixed on the lower layer of the belt of the belt type conveyor body. An air inlet groove is formed in the top of the negative pressure box, an exhaust pipe penetrating through the rack is installed on the side wall of the negative pressure box, air holes are formed in the portion, located above the air inlet groove, of the belt, a skirt edge is arranged on the belt along the edge of the belt, a plurality of V-shaped grooves are formed in the outer wall of the skirt edge and evenly distributed along the edge of the skirt edge, and the filter cloth covers the inner wall of the skirt edge. The filter has the beneficial effects that the V-shaped groove is formed in the outer wall of the skirt edge, so that the stress during deformation is reduced, the skirt edge is ensured to smoothly pass through the driving shaft, chap is avoided, air leakage caused by a gap between the inner wall and the filter cloth is also avoided, and the filtering effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of industrial and mining equipment technology, and in particular to a skirt-type air leakage prevention structure for a belt vacuum filter. Background Technology

[0002] Vacuum belt filters are a rapidly developing type of vacuum filtration equipment with expanding applications in recent years. Because they are top-feeded devices with a horizontally arranged filter surface, they are particularly suitable for solid-liquid separation processes involving slurries with high solid concentrations, wide particle size distributions, and stringent requirements for filter cake washing. Currently, they are widely used in industries such as metallurgy, mining, petroleum, chemical, coal, papermaking, food, pharmaceuticals, and environmental protection. They feature high filtration efficiency, excellent filter cake washing effect, adjustable filter cake thickness, and good adaptability to changes in material filtration performance. The belt skirt is an important component of the horizontal vacuum belt filter; its function is to form a material pool of a certain height in the effective filtration area and to protect the belt in the shaft area.

[0003] Chinese utility model patent (authorization announcement number: CN221771722U, title: A skirt structure for a belt filter) includes a skirt body disposed on both sides of the belt and reinforcing fibers disposed inside the skirt body. The skirt body has several U-shaped pleats and is divided into a lower part connecting the belt, an upper part housing the reinforcing fibers, and a middle part connecting the lower and upper parts. The reinforcing fibers are evenly distributed and wrapped within the upper part of the skirt body. This utility model, by setting reinforcing fibers inside the skirt body, effectively avoids severe cracking at the skirt pleats, extends the service life of the skirt, and prevents cracking of adjacent belt edges caused by skirt cracking, ensuring good performance of the belt filter. However, its pleated design results in gaps in the fit between the filter cloth and the belt, leading to air leakage at the belt edges and affecting the filtration effect. Utility Model Content

[0004] The purpose of this invention is to provide a skirt-type air-leakage prevention structure for a belt vacuum filter to overcome the shortcomings of the prior art.

[0005] The purpose of this utility model is achieved through the following technical solution: a skirt-type air-leakage prevention structure for a belt vacuum filter, comprising a belt conveyor body and a filter cloth closed at both ends, the filter cloth being sleeved on the belt of the belt conveyor body and being in contact with the upper layer of the belt, a negative pressure box being fixed inside the frame of the belt conveyor body, an air inlet groove being provided on the top of the negative pressure box, an exhaust pipe penetrating the frame being installed on the side wall of the negative pressure box, an air hole being provided on the belt above the air inlet groove, a skirt being provided along the edge of the belt, a V-shaped groove being provided on the outer wall of the skirt, the V-shaped groove being several and evenly distributed along the edge of the skirt, and the filter cloth covering the inner wall of the skirt.

[0006] Preferably, a secondary shaft is rotatably mounted on the frame at the discharge end of the belt conveyor body. The secondary shaft is located below the belt and is used to separate the belt from the filter cloth at the discharge end. A scraper is also installed on the frame below the secondary shaft and is used to scrape off the material on the filter cloth.

[0007] Preferably, a row of support columns is fixed inside the frame, and the row of support columns is evenly distributed along the belt conveying direction of the belt conveyor body. The negative pressure box is fixed inside the frame by the support columns, and the top of the support columns is flush with the top of the negative pressure box.

[0008] Preferably, the belt has a plurality of evenly distributed air grooves, the air grooves extending along a direction perpendicular to the conveying direction of the belt, and each air groove has an air hole at its bottom.

[0009] Preferably, the scraper includes a crossbeam and a mounting frame. The crossbeam is mounted on the frame at the discharge end and is located below the filter cloth. One end of the mounting frame is connected to the crossbeam, and a scraper is mounted on the other end of the frame. The scraper is in contact with the filter cloth.

[0010] Preferably, the mounting bracket is hinged to the crossbeam, and a spring is connected to the side wall of the mounting bracket near the scraper, with the other end of the spring connected to the frame.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] A V-shaped groove is made on the outer wall of the skirt to reduce stress during deformation, ensure that the skirt can pass smoothly through the drive shaft and avoid cracking. At the same time, it also avoids gaps between the inner wall and the filter cloth that could lead to air leakage, thus improving the filtration effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a schematic diagram of the scraper component.

[0016] Figure 4 for Figure 2 A magnified view of a portion of point A in the middle;

[0017] In the diagram, 1-belt conveyor body, 2-filter cloth, 3-negative pressure box, 4-air inlet groove, 5-exhaust pipe, 6-air hole, 7-skirt, 8-V-groove, 9-sub-shaft, 10-support column, 11-air groove, 12-crossbeam, 13-mounting bracket, 14-scraper, 15-spring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments 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.

[0020] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 , 2 As shown in Figure 4, a skirt-type vacuum filter structure for preventing air leakage includes a belt conveyor body 1 and a filter cloth 2 that is closed at both ends. The filter cloth 2 is sleeved on the belt and is attached to the upper layer of the belt of the belt conveyor body 1. A negative pressure box 3 is fixed inside the frame of the belt conveyor body 1. An air inlet groove 4 is opened on the top of the negative pressure box 3. An exhaust pipe 5 that penetrates the frame is installed on the side wall of the negative pressure box 3. An air hole 6 is opened on the belt above the air inlet groove 4. A skirt 7 is provided on the belt along its edge. A V-shaped groove 8 is opened on the outer wall of the skirt 7. There are several V-shaped grooves 8 and they are evenly distributed along the edge of the skirt 7. The filter cloth 2 covers the inner wall of the skirt 7. The V-shaped grooves 8 on the outer wall of the skirt 7 reduce the stress during deformation, ensure that the skirt 7 can pass smoothly through the drive shaft, avoid cracking, and also prevent the gap between the inner wall and the filter cloth 2 from causing air leakage, thereby improving the filtration effect.

[0025] In this embodiment, as Figure 1-4 As shown, a secondary shaft 9 is rotatably mounted on the frame at the discharge end of the belt conveyor body 1. The secondary shaft 9 is located below the belt and is used to separate the belt from the filter cloth 2 at the discharge end. A scraper is also installed on the frame below the secondary shaft 9. The scraper is used to scrape off the material on the filter cloth 2. The filter cloth 2 is peeled off by the secondary shaft 9, which facilitates the removal of the dewatered material. With the use of the scraper, the removal of the material can be more thorough.

[0026] In this embodiment, as Figure 1-4 As shown, a row of support columns 10 is fixed inside the frame. The row of support columns 10 is evenly distributed along the belt conveying direction of the belt conveyor body 1. The negative pressure box 3 is fixed inside the frame through the support columns 10, and the top of the support columns 10 is flush with the top of the negative pressure box 3. The support columns 10 are in line contact with the belt, which can ensure the support of the belt and reduce the wear of the belt.

[0027] In this embodiment, as Figure 1-4 As shown, the belt has several evenly distributed air grooves 11. The air grooves 11 extend along the conveying direction perpendicular to the belt. Each air groove 11 has an air hole 6 at its bottom, which increases the water absorption area of ​​the filter cloth 2 in the cross section (the surface perpendicular to the conveying direction of the belt) of the negative pressure box 3, and improves the dewatering speed of the material.

[0028] In this embodiment, as Figure 1-4 As shown, the scraping component includes a crossbeam 12 and a mounting frame 13. The crossbeam 12 is mounted on the frame at the discharge end and is located below the filter cloth 2. One end of the mounting frame 13 is connected to the crossbeam 12, and the other end is equipped with a scraper 14. The scraper 14 is in contact with the filter cloth 2. The scraper 14 removes the clumps on the filter cloth 2, keeps the surface of the filter cloth 2 clean, and ensures the filtration effect of the filter cloth 2.

[0029] In this embodiment, as Figure 1-4 As shown, the mounting frame 13 is hinged to the crossbeam 12. A spring 15 is connected to the side wall of the mounting frame 13 near the scraper 14. The other end of the spring 15 is connected to the frame. The mounting frame 13 is made movable so that the scraper 14 can always be in close contact with the surface of the filter cloth 2.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A skirt-type air-leakage prevention structure for a belt vacuum filter, comprising a belt conveyor body (1) and a filter cloth (2) closed at both ends, wherein the filter cloth (2) is sleeved on a belt and the filter cloth (2) is in contact with the upper layer of the belt of the belt conveyor body (1), a negative pressure box (3) is fixed inside the frame of the belt conveyor body (1), an air inlet groove (4) is provided on the top of the negative pressure box (3), an exhaust pipe (5) penetrating the frame is installed on the side wall of the negative pressure box (3), and an air hole (6) is provided on the belt above the air inlet groove (4), characterized in that: The belt has a skirt (7) along its edge, and a V-shaped groove (8) is provided on the outer wall of the skirt (7). The V-shaped groove (8) is a plurality of grooves and is evenly distributed along the edge of the skirt. The filter cloth (2) covers the inner wall of the skirt (7).

2. The skirt-type air-leakage prevention structure of a belt vacuum filter according to claim 1, characterized in that: A secondary shaft (9) is rotatably mounted on the frame at the discharge end of the belt conveyor body (1). The secondary shaft (9) is located below the belt and is used to separate the belt from the filter cloth (2) at the discharge end. A scraper is also installed on the frame below the secondary shaft (9) and is used to scrape off the material on the filter cloth (2).

3. The skirt-type air-leakage prevention structure of a belt vacuum filter according to claim 1, characterized in that: A row of support columns (10) is fixed inside the frame. The row of support columns (10) is evenly distributed along the belt conveying direction of the belt conveyor body (1). The negative pressure box (3) is fixed inside the frame by the support columns (10), and the top of the support columns (10) is flush with the top of the negative pressure box (3).

4. The skirt-type air-leakage prevention structure of a belt vacuum filter according to claim 1, characterized in that: The belt is provided with a plurality of evenly distributed air grooves (11), the air grooves (11) extend along the conveying direction perpendicular to the belt, and each air groove (11) is provided with an air hole (6) at its bottom.

5. The skirt-type air-leakage prevention structure of a belt vacuum filter according to claim 2, characterized in that: The scraping component includes a crossbeam (12) and a mounting frame (13). The crossbeam (12) is mounted on the frame at the discharge end. The crossbeam (12) is located below the filter cloth (2). One end of the mounting frame (13) is connected to the crossbeam (12), and the other end is equipped with a scraper (14). The scraper (14) is in contact with the filter cloth (2).

6. The skirt-type air-leakage prevention structure of a belt vacuum filter according to claim 5, characterized in that: The mounting bracket (13) is hinged to the crossbeam (12), and a spring (15) is connected to the side wall of the mounting bracket (13) near the scraper (14), and the other end of the spring (15) is connected to the frame.

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