An explosion-proof dust collector filter cartridge

Abstract

This utility model discloses an explosion-proof dust collector filter cartridge. A reinforcing frame is fitted onto the inner surface of the filter cartridge body. A conductive mesh layer is fixedly connected to the inner surface of the reinforcing frame, and a metal connecting piece is fixedly connected to the outer surface of the conductive mesh layer. Assembly rings are fixedly connected to the bottom of the filter cartridge body and the bottom of the reinforcing frame, and to the top of the filter cartridge body and the top of the reinforcing frame, respectively. A fixing seat is fixedly connected to the inner surface of each assembly ring at the bottom, and a cylinder body is fixedly connected to the bottom of the fixing seat. In this utility model, by setting a conductive mesh layer inside the filter cartridge body and combining it with a grounding component, static electricity generated during the filtration process can be effectively dissipated, significantly reducing the risk of dust explosion. At the same time, the overall structure is simple and reliable, and easy to maintain and install. The fixed connection method between the conductive mesh layer and the reinforcing frame ensures good conductivity and structural stability, making it suitable for filtration environments of various flammable and explosive dusts.

Description

Technical Field

[0001] This utility model relates to the field of dust collector filter cartridge technology, and in particular to an explosion-proof dust collector filter cartridge. Background Technology

[0002] Dust collector cartridges, as core filtration elements in industrial dust collection systems, are widely used in dust control in industries such as cement, metallurgy, chemicals, and food processing. Dust collector cartridges typically use pleated filter paper or needle-punched felt as the filter medium, capturing dust particles through surface or depth filtration. However, with increasingly stringent industrial safety requirements, especially when handling flammable and explosive dusts such as aluminum powder, magnesium powder, and coal powder, conventional dust collector cartridges have revealed numerous safety hazards and technical deficiencies.

[0003] Existing dust collector filter cartridges suffer from the following main problems: First, during the filtration process, the continuous friction between dust and the filter media generates a large amount of static charge. This accumulated static charge can produce discharge sparks, becoming a potential ignition source for dust explosions. Although some products attempt to improve this by coating the filter media surface with antistatic agents, these coatings are prone to wear and failure over long-term use and are significantly affected by ambient humidity. Second, when the filter cartridge becomes clogged or the dust concentration suddenly increases, the internal pressure rises sharply. Existing dust collector filter cartridges lack an effective rapid pressure relief mechanism, which can easily lead to explosions.

[0004] Therefore, we propose an explosion-proof dust collector filter cartridge. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose an explosion-proof dust removal filter cartridge.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an explosion-proof dust removal filter cartridge, comprising a filter cartridge body, wherein a reinforcing skeleton is sleeved on the inner surface of the filter cartridge body, a conductive mesh layer is fixedly connected to the inner surface of the reinforcing skeleton, and a metal connecting piece is fixedly connected to the outer surface of the conductive mesh layer.

[0007] The bottom of the filter cartridge body and the bottom of the reinforcing frame, as well as the top of the filter cartridge body and the top of the reinforcing frame, are all fixedly connected with assembly rings.

[0008] A fixing seat is fixedly connected to the inner surface of the bottom single assembly ring, and a cylinder is fixedly connected to the bottom of the fixing seat. An elastic piston is installed inside the cylinder, and a pressure relief pipe is fixedly connected to one side of the outer surface of the cylinder.

[0009] The base is provided with a grounding component extending from the bottom to the top, and the grounding component is connected to a metal connecting piece.

[0010] Furthermore, the reinforcing frame includes two mounting rings, which are fixedly connected to the assembly ring. Multiple reinforcing rods are fixedly connected between the two mounting rings, and the reinforcing rods are fixedly connected to the conductive mesh layer. This significantly improves the overall strength of the filter cartridge, ensuring that it will not deform under high negative pressure conditions, while providing a stable support foundation for the conductive mesh layer.

[0011] Furthermore, each of the two assembly rings is fixedly connected to an annular sealing gasket on an adjacent side, and the annular sealing gasket is in sealing contact with the end face of the filter cartridge body and the end face of the mounting ring, and the sealing design effectively prevents dust leakage.

[0012] Furthermore, the elastic piston includes a spring, which is fixedly installed at the bottom of the cylinder. A slider is fixedly connected to the top of the spring, and a sealing ring is fixedly fitted onto the outer surface of the slider. The sealing ring slides against the inner wall of the cylinder, which can automatically open to release pressure when the pressure exceeds a certain level, effectively preventing the risk of explosion.

[0013] Furthermore, the grounding assembly includes a metal rod that passes through the mounting base and is fixedly connected to it. The metal rod is fixed to the metal connecting piece by fixing bolts. This design ensures that the grounding resistance is less than 4Ω, which meets the requirements of the ATEX explosion-proof standard.

[0014] Furthermore, a clamping bolt is provided on one side of the outer surface of the metal rod, extending to the other side, and the clamping bolt is threadedly connected to the metal rod, which facilitates fixing the external grounding wire to the metal rod.

[0015] The beneficial effects of this utility model are:

[0016] 1. In use, this utility model effectively dissipates static electricity generated during filtration by incorporating a conductive mesh layer within the filter cartridge and combining it with a grounding component. This significantly reduces the risk of dust explosions. Furthermore, the overall structure is simple, reliable, and easy to maintain and install. The fixed connection between the conductive mesh layer and the reinforcing frame ensures excellent conductivity and structural stability, making it suitable for filtration environments containing various flammable and explosive dusts.

[0017] 2. In use, this utility model employs a mechanical pressure relief structure combining an elastic piston and a pressure relief pipe. When the internal pressure of the filter cartridge exceeds the set value, it can respond quickly and automatically relieve pressure, effectively preventing explosion accidents caused by pressure accumulation. This pressure relief structure is ingeniously designed and can automatically reset after pressure relief without manual intervention, greatly improving the safety and ease of use of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional first-view structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall three-dimensional second-view structure of this utility model;

[0021] Figure 3 This is a three-dimensional cross-sectional view of the cylindrical body of this utility model;

[0022] Figure 4 This is a partial cross-sectional view of the reinforcing skeleton of this utility model.

[0023] The attached figures are labeled as follows:

[0024] 1. Filter cartridge body; 2. Assembly ring; 3. Conductive mesh layer; 4. Cylinder; 5. Pressure relief pipe; 6. Fixing seat; 7. Clamping bolt; 8. Slider; 9. Sealing ring; 10. Spring; 11. Metal rod; 12. Annular sealing gasket; 13. Fixing bolt; 14. Metal connecting piece; 15. Mounting ring; 16. Reinforcing rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-4 As shown, an explosion-proof dust collector filter cartridge is disclosed, including a filter cartridge body 1. A reinforcing skeleton is fitted on the inner surface of the filter cartridge body 1. A conductive mesh layer 3 is fixedly connected to the inner surface of the reinforcing skeleton. A metal connecting piece 14 is fixedly connected to the outer surface of the conductive mesh layer 3. The conductive mesh layer 3 adopts a double-layer woven structure, with the inner layer being a 60-mesh stainless steel mesh and the outer layer being covered with a conductive carbon fiber woven tape. The metal connecting piece 14 is made of copper sheet with a nickel-plated surface.

[0027] The bottom of the filter cartridge body 1 and the bottom of the reinforcing frame, as well as the top of the filter cartridge body 1 and the top of the reinforcing frame, are all fixedly connected to assembly rings 2. The reinforcing frame includes two mounting rings 15. The mounting rings 15 are made of aluminum alloy 6061-T6 and are anodized, which has excellent corrosion resistance. The mounting rings 15 are fixedly connected to the assembly rings 2. Multiple reinforcing rods 16 are fixedly connected between the two mounting rings 15. The reinforcing rods 16 are made of 304 stainless steel round bars and are connected to the mounting rings 15 by argon arc welding. The reinforcing rods 16 are fixedly connected to the conductive mesh layer 3. Annular sealing gaskets 12 are fixedly connected to adjacent sides of the two assembly rings 2, and the annular sealing gaskets 12 are in sealing contact with the end face of the filter cartridge body 1 and the end face of the mounting rings 15.

[0028] A fixed seat 6 is fixedly connected to the inner surface of the bottom single assembly ring 2. A cylinder 4 is fixedly connected to the bottom of the fixed seat 6. The cylinder 4 is made of seamless steel pipe cold drawing and the inner wall is hard anodized. An elastic piston is installed inside the cylinder 4. A pressure relief pipe 5 is fixedly connected to one side of the outer surface of the cylinder 4. The elastic piston includes a spring 10, and the spring 10 is fixedly installed at the inner bottom of the cylinder 4. A slider 8 is fixedly connected to the top of the spring 10. A sealing ring 9 is fixedly sleeved on the outer surface of the slider 8, and the sealing ring 9 slides in contact with the inner wall of the cylinder 4. The spring 10 is made of 60Si2MnA material with a stiffness coefficient of 50N / mm±5%.

[0029] The bottom of the fixing base 6 is provided with a grounding component that extends to the top, and the grounding component is connected to the metal connecting piece 14. The grounding component includes a metal rod 11, which extends through the fixing base 6 and is fixedly connected to the fixing base 6. The metal rod 11 and the metal connecting piece 14 are fixed by a fixing bolt 13. One side of the outer surface of the metal rod 11 is provided with a clamping bolt 7 that extends to the other side, and the clamping bolt 7 is threadedly connected to the metal rod 11. The metal rod 11 is made of T2 copper.

[0030] Working principle:

[0031] This explosion-proof dust collector cartridge works in tandem with both static electricity conduction and mechanical pressure relief mechanisms to ensure safe operation in flammable and explosive dust environments.

[0032] 1. Electrostatic conduction mechanism

[0033] During the filtration process, dust particles generate static electricity through friction with the filter media. This static electricity is conducted through the conductive mesh layer 3 to the metal connecting piece 14, and then through the metal rod 11 and the clamping bolt 7 (which connects to a grounding wire, which is connected to the dust collector's outer casing) to ground the dust collector's outer casing. The conductive mesh layer 3 has a surface resistivity ≤10 Ω·cm. 4 The Ω-sized stainless steel braided mesh fits tightly against the reinforcing frame, ensuring rapid static discharge. The metal connecting piece 14 is pressed into the grounding component by the fixing bolt 13, with a contact resistance of <0.1Ω, effectively preventing static buildup.

[0034] 2. Pressure relief mechanism

[0035] Under normal conditions, spring 10 pushes slider 8 upward, sealing ring 9 seals the inner cavity of cylinder 4, and no airflow passes through pressure relief pipe 5.

[0036] When the internal pressure of the filter cartridge exceeds the set value (e.g., 0.05MPa), the high-pressure gas enters the cylinder 4 through the fixed seat 6, pushes the slider 8 to compress the spring 10 and move it down, causing the sealing ring 9 to disengage from the sealing surface, and the high-pressure gas is ejected from the pressure relief pipe 5.

[0037] After the pressure decreases, the spring 10 pushes the slider 8 back to its original position, resealing the cylinder 4.

[0038] Application scenarios:

[0039] This product is suitable for filter units in baghouse dust collectors, cyclone dust collectors, or central dust collection systems, and is especially suitable for handling flammable and explosive dust such as aluminum powder, coal powder, flour, and sulfur.

[0040] Installation method:

[0041] The assembly ring 2 is externally welded to a fixed mounting flange. The mounting flange is bolted to the dust collector tube sheet, and a sealing ring is used to ensure a tight seal.

[0042] The metal rod 11 is tightly connected to the metal casing of the dust collector by grounding wire and clamping bolt 7.

[0043] The pressure relief pipe 5 is connected to an explosion-proof pressure relief pipe conforming to GB / T 15605 standard. The end of the pipe should be led to a safe area or explosion relief tank.

[0044] After installation, the resistance between the metal rod 11 and the equipment casing must be tested to ensure it is ≤10Ω.

[0045] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An explosion-proof dust removal filter cartridge comprising a filter cartridge body (1), characterized in that: The inner surface of the filter cartridge body (1) is fitted with a reinforcing skeleton, and a conductive mesh layer (3) is fixedly connected to the inner surface of the reinforcing skeleton. A metal connecting piece (14) is fixedly connected to the outer surface of the conductive mesh layer (3). The bottom of the filter cartridge body (1) and the bottom of the reinforcing frame, and the top of the filter cartridge body (1) and the top of the reinforcing frame are all fixedly connected with assembly rings (2); A fixing seat (6) is fixedly connected to the inner surface of the bottom single assembly ring (2), and a cylinder (4) is fixedly connected to the bottom of the fixing seat (6). An elastic piston is installed inside the cylinder (4), and a pressure relief pipe (5) is fixedly connected to one side of the outer surface of the cylinder (4). The bottom of the mounting base (6) is provided with a grounding component that extends through to the top, and the grounding component is connected to the metal connecting piece (14).

2. The explosion-proof dust removal filter cartridge according to claim 1, characterized in that: The reinforcing frame includes two mounting rings (15), and the mounting rings (15) are fixedly connected to the assembly ring (2). A plurality of reinforcing rods (16) are fixedly connected between the two mounting rings (15), and the reinforcing rods (16) are fixedly connected to the conductive mesh layer (3).

3. The explosion-proof dust collector filter cartridge according to claim 2, characterized in that: An annular sealing gasket (12) is fixedly connected to each of the two assembly rings (2) on adjacent sides, and the annular sealing gasket (12) is in sealing contact with the end face of the filter body (1) and the end face of the mounting ring (15).

4. The explosion-proof dust removal filter cartridge according to claim 1, characterized in that: The elastic piston includes a spring (10), and the spring (10) is fixedly installed at the inner bottom of the cylinder (4). A slider (8) is fixedly connected to the top of the spring (10). A sealing ring (9) is fixedly sleeved on the outer surface of the slider (8), and the sealing ring (9) slides against the inner wall of the cylinder (4).

5. The explosion-proof dust removal filter cartridge according to claim 1, characterized in that: The grounding assembly includes a metal rod (11), which passes through the fixing seat (6) and is fixedly connected to the fixing seat (6). The metal rod (11) and the metal connecting piece (14) are fixed together by a fixing bolt (13).

6. An explosion-proof dust removal filter cartridge according to claim 5, characterized in that: The outer surface of the metal rod (11) is provided with a clamping bolt (7) that extends through to the other side, and the clamping bolt (7) is threadedly connected to the metal rod (11).

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