Dustproof mechanism of ventilation equipment

Abstract

The utility model relates to a dustproof mechanism of ventilation equipment, including nested filter cartridge and protective cylinder, filter cartridge one end fixed limit stop, and the limit stop is connected with filter cartridge and covers first sealing washer, and its outside end face covers second sealing washer, the other end port of filter cartridge covers third sealing washer, and the inner wall of protective cylinder one end is provided with annular limit slot, and the other end inner wall is fixed and sets up annular limit strip, when assembling, filter cartridge is inserted into the inner chamber of protective cylinder and makes limit stop embed limit slot, and drive first sealing washer is close to limit slot deep end face and forms main seal, and the filter cartridge of synchronous propulsion is limited by annular limit strip, forces third sealing washer to press the end face of annular limit strip and forms secondary seal, this structure realizes double axial self -sealing through single-time insertion action, avoids independent fastener such as bolt, overcomes the defect that traditional filter core is complex because of multi -step fastening and dismounting, and maintenance time -consuming is long, and the replacement efficiency and operation convenience are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of dust prevention technology for ventilation equipment, and in particular to a dust prevention mechanism for ventilation equipment. Background Technology

[0002] ① In the operation of traditional ventilation equipment, it is common practice for fans to directly draw in ambient air. This untreated air enters the fan and subsequent duct system, causing dust, fibers, and other solid particles to accumulate and adhere to moving parts such as fan blades, motor bearings, and the inner walls of the ducts. This dust accumulation leads to multiple problems: deposits increase blade weight, disrupting dynamic balance and causing increased vibration and noise; dust entering bearing clearances accelerates wear and shortens lifespan; accumulation on motor cooling components reduces heat dissipation efficiency, leading to overheating; and adhering to the inner walls of the ducts increases airflow resistance, reducing overall efficiency. Over long-term operation, not only does equipment performance deteriorate significantly, but maintenance costs and failure rates also increase substantially, all stemming from the lack of effective dust removal from the intake air.

[0003] ② To address the aforementioned dust hazard problem, existing technical solutions add a replaceable filter structure component at the front end of the fan inlet. This type of structure typically includes a support frame and a detachable filter element (such as a filter bag, filter cartridge, or pleated filter media). The frame is fixed to the interface at the fan inlet. Before entering the fan, the air must first flow through this filter element. The filter medium inside the filter element (such as fine-pore foam, non-woven fabric, or metal filter screen) relies on the physical barrier effect of its fiber network to trap most of the dust particles in the air on the surface or in the internal pores of the filter media. The filtered clean air is then propelled into the subsequent system by the fan impeller. This method significantly reduces the amount of dust entering the equipment from the source, preventing contamination of core components.

[0004] ③ However, while this type of solution, which adds a filter structure at the front end, effectively intercepts dust, it introduces new bottlenecks in terms of maintenance convenience. To ensure filtration efficiency and structural sealing, a tight connection is usually required between the filter element and the supporting frame. This connection often relies on multiple independent fasteners (such as multiple circumferentially arranged bolts or complex snap-fit ​​devices) and step-by-step installation of sealing gaskets. When the dust adsorbed on the surface of the filter element reaches saturation after the equipment has been running for a period of time, and it needs to be disassembled for cleaning or replacement, the cumbersome fastening operations become a burden on maintenance work. Maintenance personnel must loosen all bolts or unlock all snap-fits one by one to remove the old filter element. After replacing the new filter element, multiple sealing gaskets must be carefully positioned and all bolts or snap-fits must be tightened one by one. This multi-step fixing and sealing operation is complex, time-consuming, and improper operation can easily lead to local seal failure or omission of fastening points, significantly increasing the workload of maintenance personnel and equipment downtime. This inconvenience of disassembly is particularly prominent in working conditions where maintenance space is limited or frequent maintenance is required. Utility Model Content

[0005] The purpose of this utility model is to provide a dustproof mechanism for ventilation equipment, which solves the problem that the existing filter structure relies on multiple independent fasteners and step-by-step installation of sealing gaskets to fix and seal the filter element, resulting in cumbersome disassembly and assembly procedures, long time consumption, low maintenance efficiency, and easy sealing failure due to improper operation when cleaning or replacing the filter element.

[0006] To achieve the above objectives, this utility model provides a dustproof mechanism for a ventilation device, including a filter cartridge. A limiting plate is fixedly installed on one side of the filter cartridge. A first sealing gasket is covered on the end face of the limiting plate at the connection point with the filter cartridge. A second sealing gasket is covered on the opposite side of the limiting plate and the first sealing gasket. A third sealing gasket is covered on the opposite end of the filter cartridge and the limiting plate. The filter cartridge is inserted into the interior of a protective cylinder. A limiting groove is formed at the opening of one end of the protective cylinder. An annular limiting strip is fixedly installed on the other end of the protective cylinder. After the filter cartridge is inserted into the protective cylinder, the limiting plate is embedded in the limiting groove to form a fit and fixation between the first sealing gasket and the end face of the limiting groove, and a fit and fixation between the third sealing gasket and the annular limiting strip.

[0007] The filter cylinder has a filter screen fixedly installed at the opening near the limiting plate, and several electrostatic fins fixedly installed at the opening near the annular limiting strip.

[0008] An electrostatic generator is fixedly installed inside the filter cylinder at the opening near the annular limiting strip. The electrostatic generator is connected to the corresponding connector of the electrostatic fins by flexible wires.

[0009] The protective cylinder is fixedly installed with a first assembly plate at one end near the limiting groove. The first assembly plate is provided with a plurality of first assembly holes spaced apart, and bolts pass through the first assembly holes to fix it to the fan.

[0010] The protective cylinder is fixedly installed with a second assembly plate at one end near the annular limiting strip. The second assembly plate is provided with a number of second assembly holes spaced apart, and bolts pass through the second assembly holes to fix the pipe.

[0011] This utility model discloses a dustproof mechanism for a ventilation device, which mainly consists of a nested filter cylinder and a protective cylinder forming the main structure. Its core technology lies in the precise fit between a limiting plate fixed at one end of the filter cylinder and a limiting groove opened at the open end of the protective cylinder. Specifically, the limiting plate is firmly connected to the end of the filter cylinder, and the end face of the limiting plate that contacts the filter cylinder is covered with a first sealing gasket. At the same time, a second sealing gasket is covered on the outer side of the limiting plate, and a third sealing gasket is covered on the other end edge of the filter cylinder opposite to the limiting plate. The protective cylinder is designed as a cylindrical structure with open ends, with an annular limiting groove machined on the inner wall of one end and an inwardly protruding annular limiting strip fixed on the inner wall of the other end.

[0012] During assembly, the filter cartridge is inserted into the protective cylinder cavity along the axial direction until the limiting plate is fully embedded in the limiting groove of the protective cylinder. This insertion action directly triggers multiple sealing linkages: when the limiting plate is embedded in the limiting groove, the second sealing gasket on the limiting plate first contacts the end face of the protective cylinder and forms a pre-tightening under the action of axial thrust; this pressure is transmitted to the first sealing gasket through the limiting plate, forcing the first sealing gasket to fit tightly against the deep end face of the limiting groove to form the main sealing interface. At the same time, as the filter cartridge is pushed forward, the third sealing gasket covering its port is finally squeezed and pressed against the side end face of the annular limiting strip on the inner wall of the protective cylinder, forming a second axial end face seal. The above two sealing actions are completed simultaneously in the single insertion of the filter cartridge into the protective cylinder, forming a gapless double axial sealing barrier.

[0013] This structure solves the pain point of cumbersome filter element disassembly and assembly: the filter cartridge can be assembled or separated from the protective cartridge with only one insertion and removal action, without the need to operate any bolts, clips or other additional fasteners; through the embedded cooperation of the limiting plate and the limiting groove, combined with the self-compression effect of the three sealing gaskets, not only is the airflow path sealed and leak-free throughout, but the filter cartridge also obtains axial positioning and bidirectional locking after installation, effectively preventing loosening and falling off during operation. During maintenance, the filter cartridge can be cleaned or replaced simply by pulling it out of the protective cartridge as a whole, greatly reducing downtime maintenance time and operational complexity. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the protective cylinder according to an embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the filter cartridge according to an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the electrostatic fins in an embodiment of this utility model.

[0019] In the diagram: 101, filter cartridge; 102, limiting plate; 103, first sealing gasket; 104, second sealing gasket; 105, third sealing gasket; 106, protective cylinder; 107, limiting groove; 108, annular limiting strip; 109, filter mesh; 110, electrostatic fins; 111, electrostatic generator; 112, first assembly plate; 113, first assembly hole; 114, second assembly plate; 115, second assembly hole. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] Please see Figures 1-4 .

[0022] This utility model provides a dustproof mechanism for a ventilation device. The main structure consists of a cylindrical filter cylinder 101 and an outer protective cylinder 106 forming the core component. A disc-shaped limiting plate 102 is fixedly welded to the edge of the filter cylinder 101 facing the fan inlet. A first sealing gasket 103 is bonded to the end face of the limiting plate 102 and the filter cylinder 101. A second sealing gasket 104 is covered and bonded to the other end face of the limiting plate 102 facing away from the filter cylinder 101. A third sealing gasket 105 is coaxially bonded to the edge of the filter cylinder 101 opposite to the limiting plate 102. The protective cylinder 106 is a cylindrical structure with open ends. An annular limiting groove 107 is opened on the inner wall of one end, and an annular limiting strip 108 is welded to the inner wall of the other end to form an inner flange. During installation, the filter cylinder 101 is inserted into the cavity of the protective cylinder 106 along the axial direction until the limiting plate 102 is embedded in the limiting groove 107. At this time, the limiting plate 102 forms a compression seal with the bottom end face of the limiting groove 107 through the first sealing gasket 103, while the third sealing gasket 105 at the other end of the filter cylinder 101 is pressed tightly against the side wall of the annular limiting strip 108 on the inner wall of the protective cylinder 106. The positioning and sealing of the filter cylinder 101 inside the protective cylinder 106 are achieved through these two axial compression seals.

[0023] Inside the filter cartridge 101, a high-mesh filter cloth 109 is fixedly installed at the opening near the limiting plate 102 to form a physical interception layer; at the opposite end of the cartridge, an array of multiple metal electrostatic fins 110 is fixedly installed radially; a cylindrical electrostatic generator 111 is installed at the base of the electrostatic fins 110, and the output terminals of each electrode of the electrostatic generator 111 are connected to the corresponding electrostatic fins 110 through flexible wires that are resistant to bending, thus establishing an electrostatic conduction path; a first assembly plate 112 is welded to the outer wall of the protective cartridge 106 near the limiting groove 107, and multiple first assembly holes 113 are evenly distributed on the annular assembly plate, which is rigidly fixed to the fan flange by inserting bolts; at the other end of the protective cartridge 106 near the annular limiting strip 108, a second assembly plate 114 is welded, and second assembly holes 115 are opened at the same intervals on the plate, which are connected and fixed to the ventilation duct by bolts.

[0024] When the protective cylinder 106 is fixed to the fan inlet by the first assembly plate 112, the fastening force of the fan flange pushes the protective cylinder 106 to move axially, causing the end face of the limiting groove 107 to press the second sealing gasket 104; the pressure is transmitted through the limiting plate 102 to establish a strong seal between the first sealing gasket 103 and the end face of the limiting groove 107 in the depth direction, and at the same time the reaction force pushes the filter cylinder 101 to move as a whole until the third sealing gasket 105 and the annular limiting strip 108 form a tight seal; this mechanical linkage completes the double axial sealing lock of the filter cylinder 101 at the moment of installation and fastening; when the equipment is running, the electrostatic generator 111 is energized to load high voltage static electricity on all electrostatic fins 110. After the airflow enters from the end of the second assembly plate 114, it first passes through the area of ​​electrostatic fins 110, where the electrostatic field strongly adsorbs dust particles; when the residual particles continue to flow through the inside of the filter cylinder 101, they are intercepted a second time by the filter mesh 109, and finally the clean air is output to the fan through the area of ​​the limiting plate 102, realizing two-stage dust prevention.

[0025] Working principle: When installing the dustproof mechanism of the ventilation equipment, the protective cylinder 106 is first tightly fixed to the inlet interface of the fan by passing the bolt through the first assembly hole 113 on the first assembly plate 112; during the bolt tightening process, the fan interface end face will continuously apply axial compressive force to the first assembly plate 112, and this pressure is synchronously transmitted to the protective cylinder 106. The end face of the limiting groove 107 on the protective cylinder 106 pushes the second sealing gasket 104 positioned in front of it. Since the second sealing gasket 104 is tightly attached to the surface of the limiting plate 102 facing away from the filter cylinder 101, this thrust acts directly on the entire limiting plate 102. The pushing and pressing action of the limiting plate 102 causes the first sealing gasket 103 covering the connection between itself and the filter cylinder 101 to be strongly axially compressed towards the deep end face of the limiting groove 107. This tight compression ensures that a stable and leak-free static sealing interface is formed between the first sealing gasket 103 and the end face of the limiting groove 107, effectively blocking potential airflow gaps. At this time, the thrust applied to the limiting plate 102 will push the filter cylinder 101 inserted into the protective cylinder 106 along the axis of the filter cylinder 101 to move towards the annular limiting strip 108 at the other end of the protective cylinder 106; the third sealing gasket 105 covering the end of the filter cylinder 101 near the annular limiting strip 108 will finally be strongly pressed against the annular limiting strip 108, thereby forming another reliable seal at the end of the protective cylinder 106. At the same time, this reverse interaction force also realizes the axial positioning and fixation of the filter cylinder 101 in the cavity of the protective cylinder 106, preventing it from loosening during operation; when the overall dustproof mechanism is fixed, the fan can be started.

[0026] When the equipment is working, the electrostatic generator 111, located at the opening on the side of the filter cartridge 101 near the annular limiting bar 108, is energized first. The static electricity generated is conducted through a flexible wire to a series of electrostatic fins 110 also located at this location. The electrostatic fins 110 thus acquire and maintain a high-voltage electrostatic state. The airflow generated by the fan first enters the protective cartridge 106 from the end with the annular limiting bar 108 and the second assembly plate 114 (this plate is fixed to the pipe by bolts through the second assembly hole 115) and flows towards the charged electrostatic fin area of ​​the filter cartridge 101. When the air containing dust impurities passes through the array of fins with high-voltage electrostatic charge, the strong electric field generated by the electrostatic fins 110 can efficiently capture larger dust particles and some charged particles suspended in the air. These particles are firmly captured by electrostatic adsorption. The airflow is trapped on the surface of the fins or at a very close distance; then, the airflow continues to penetrate deeper into the filter cartridge 101 and flows to its other end (i.e., the end near the limiting plate 102); at this time, the smaller particles remaining in the air and impurities that have not been completely captured by electrostatics are blocked and filtered by the dense fiber structure of the fine filter cloth 109 fixed at the opening of the filter cartridge 101; the clean air, after being treated by both "electrostatic adsorption" and "mesh cloth interception", finally flows out of the filter cartridge 101 through the area near the limiting plate 102, enters the fan behind it, and is then discharged by the fan, thereby effectively preventing dust from entering the core air duct and subsequent pipe network of the ventilation equipment with the airflow, protecting the internal components such as the fan blades from wear, scaling or corrosion by dust, and significantly improving the overall reliability and service life of the ventilation equipment in dusty environments.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A dust prevention mechanism of a ventilation device including a filter cartridge (101), characterized by: A limiting plate (102) is fixedly installed on one side of the filter cartridge (101). A first sealing gasket (103) is covered on the end face of the limiting plate (102) at the connection point with the filter cartridge (101). A second sealing gasket (104) is covered on the opposite side of the limiting plate (102) and the first sealing gasket (103). A third sealing gasket (105) is covered on the opposite end of the filter cartridge (101) and the limiting plate (102). The filter cartridge (101) is inserted into the protective cylinder (106). Inside, a limiting groove (107) is opened at one end of the protective cylinder (106), and an annular limiting strip (108) is fixedly installed at the other end of the protective cylinder (106). After the filter cylinder (101) is inserted into the protective cylinder (106), the limiting plate (102) is embedded in the limiting groove (107) to form a first sealing gasket (103) that fits and is fixed to the end face of the limiting groove (107), and a third sealing gasket (105) that fits and is fixed to the annular limiting strip (108).

2. A dust prevention mechanism for a ventilation device according to claim 1, characterized in that: A filter screen (109) is fixedly installed at the opening inside the filter cylinder (101) near the limiting plate (102), and several electrostatic fins (110) are fixedly installed at the opening inside the filter cylinder (101) near the annular limiting strip (108).

3. A dust prevention mechanism for a ventilation device according to claim 2, characterized in that: An electrostatic generator (111) is fixedly installed at the opening on the side of the filter cylinder (101) near the annular limiting strip (108). The electrostatic generator (111) and the corresponding connector of the electrostatic fin (110) are respectively connected by flexible wires.

4. The dust prevention mechanism of a ventilation device according to claim 1, wherein: The protective cylinder (106) is fixedly installed with a first assembly plate (112) near the limiting groove (107). The first assembly plate (112) is provided with a plurality of first assembly holes (113) spaced apart. The first assembly holes (113) are fixed to the fan by bolts passing through them.

5. A dust prevention mechanism for a ventilation device according to claim 4, wherein: The protective cylinder (106) is fixedly installed with a second assembly plate (114) at one end near the annular limiting strip (108). The second assembly plate (114) is provided with a plurality of second assembly holes (115) spaced apart. The pipe is fixed by bolts passing through the second assembly holes (115).

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