Anti-electromagnetic interference band-pass filter

Abstract

The utility model discloses an anti-electromagnetic interference band-pass filter, relates to the technical field of band-pass filters, and solves the problems of poor protection effect, easy deformation and damage due to external force collision, easy damage to internal elements of the filter, and high reliability of the conventional filter because the conventional filter is only protected by a shell of the conventional filter. And the overall heat dissipation effect is poor. Comprising a filter body, an input port and an output port, the filter further comprises a metal protective cover, a mounting groove is formed in the inner wall of the metal protective cover, the filter body is arranged in the mounting groove, the outer wall face of the metal protective cover is wrapped with a layer of rubber protective sleeve, and a plurality of protruding rods are arranged on the rubber protective sleeve. According to the utility model, internal elements of the filter body can be efficiently protected, the filter body is not easy to deform and damage due to external force collision, heat dissipation is realized, the filter body can be prevented from being damaged due to too high temperature, and thus the service life of the filter body is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of bandpass filters, and in particular relates to a bandpass filter capable of resisting electromagnetic interference. Background Art

[0002] In the power electronics industry and the communications industry, in order to ensure the smooth flow of power and communication lines, in the process of designing power and communication equipment, while considering normal power grid fluctuations and signal interference, it is also necessary to consider the damage to the equipment caused by strong electromagnetic interference and high-intensity transient interference such as lightning. Various types of filters are widely used in the prior art, such as power filters and signal filters, which can purify the power grid and filter out unnecessary clutter and interference in the signal. Among them, the power filter, also known as the "power EMI filter" or "EMI power filter", is a passive bidirectional network, an electrical device that effectively filters a specific frequency point in the power supply or a frequency other than the frequency point, one end of which is connected to the power supply and the other end is connected to the load.

[0003] At present, when the existing filters are used in conjunction with equipment, the filter itself is only protected by its own shell, and the protection effect is poor. It is easy to be deformed and damaged by external force collision, and the internal components of the filter are easily damaged. In addition, its overall heat dissipation effect is poor.

[0004] Therefore, based on the above problems, we designed a bandpass filter that is resistant to electromagnetic interference. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an electromagnetic interference-resistant bandpass filter, which solves the technical problems that the existing filter only relies on its own shell for protection, has poor protection effect, is easily deformed and damaged by external force collision, is easy to damage the internal components of the filter, and has poor overall heat dissipation effect.

[0006] To achieve the above-mentioned object, according to an embodiment of the first aspect of the utility model, an electromagnetic interference-resistant bandpass filter is provided, comprising a filter body and an input port and an output port arranged on both sides of the filter body;

[0007] It also includes: a metal protective cover, the inner wall of the metal protective cover is provided with a mounting groove, the filter body is arranged in the mounting groove, the outer wall surface of the metal protective cover is wrapped with a layer of rubber protective sleeve, and the rubber protective sleeve is provided with a plurality of convex rods;

[0008] The heat dissipation structure includes heat dissipation fins embedded in the bottom surface of the metal protective cover and heat-conductive silica gel arranged on the inner wall of the installation groove.

[0009] A further improvement is that positioning columns are provided at the four corners of the installation groove, the outer wall surface of each positioning column is provided with an external thread, and mounting ears are provided at the four corners of the filter body, each mounting ear is respectively sleeved on the positioning column, and each positioning column is threadedly connected with a fastening sleeve.

[0010] A further improvement is that a maintenance gap is provided on the surface of the metal protective cover, and a circle of silicone strips is provided on the inner wall of the maintenance gap.

[0011] A further improvement is that an inspection cover is provided in the inspection gap, fixing screws are provided at the four corners of the inspection cover, and a fixing clamp is provided on the bottom surface of the inspection cover. During installation, the fixing clamp of the inspection cover is clamped in the inspection gap, and the outer wall of the fixing clamp and the silicone strip are in contact with each other to improve the waterproof performance, and then the inspection cover is installed in the inspection gap using the fixing screws to achieve convenient disassembly and assembly.

[0012] A further improvement is that a layer of rubber protective pad is provided on the surface of the inspection cover, a plurality of protruding rods are provided on the rubber protective pad, and the rubber protective sleeve is used to protect the filter body in the metal protective cover.

[0013] A further improvement is that both sides of the metal protective cover are penetrated by bayonet holes for installing the input port and the output port.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The utility model can conveniently realize the disassembly and assembly of the filter body by clamping the filter body in the installation groove so that each installation ear is respectively sleeved on the positioning column, and then each fastening sleeve is threadedly sleeved on the positioning column;

[0016] (2) The utility model improves the waterproof performance by clamping the fixing clamp ring of the inspection cover plate in the inspection notch and making the outer wall of the fixing clamp ring and the silicone strip contact each other, and then uses the fixing screws to install the inspection cover plate in the inspection notch to realize the disassembly and assembly of the inspection cover plate;

[0017] (3) The utility model utilizes the rubber protective sleeve, rubber protective pad, thermal conductive silicone and heat dissipation fins to dissipate the heat of the filter body, thereby achieving efficient protection of the internal components of the filter body, making it difficult for the filter body to be deformed and damaged by external force collision, while achieving heat dissipation, avoiding damage to the filter body due to excessive temperature, thereby extending the service life of the filter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional top view of the structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the utility model in a front view of the cross section.

[0021] Markings in the figure:

[0022] 1. Filter body; 11. Input port; 12. Output port; 13. Mounting ear; 2. Metal protective cover; 21. Inspection cover; 211. Inspection notch; 212. Silicone strip; 213. Fixing ring; 214. Rubber protective pad; 22. Mounting groove; 221. Positioning column; 222. Fastening sleeve; 23. Rubber protective cover; 3. Heat dissipation structure; 31. Heat dissipation fins; 32. Thermal conductive silicone. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 As shown, an electromagnetic interference-resistant bandpass filter comprises a filter body 1 and an input port 11 and an output port 12 arranged on both sides of the filter body 1;

[0025] Wherein, the two sides of the metal protective cover 2 are provided with bayonet holes for installing the input port 11 and the output port 12, which are used for installing the input port 11 and the output port 12;

[0026] like Figure 2 and Figure 3 As shown, the implementation includes: a metal protective cover 2, the inner wall of the metal protective cover 2 is provided with a mounting groove 22, the filter body 1 is arranged in the mounting groove 22, the outer wall surface of the metal protective cover 2 is wrapped with a layer of rubber protective cover 23, and the rubber protective cover 23 is provided with a plurality of protruding rods;

[0027] A layer of rubber protective pad 214 is provided on the surface of the inspection cover 21, and a plurality of convex rods are provided on the rubber protective pad 214. The rubber protective pad 214 is used to protect the filter body 1 in the metal protective cover 2;

[0028] In the implementation, positioning posts 221 are additionally provided at the four corners of the mounting groove 22, and the outer wall surface of each positioning post 221 is provided with an external thread. The four corners of the filter body 1 are provided with mounting ears 13, and each mounting ear 13 is respectively sleeved on the positioning post 221, and each positioning post 221 is threadedly connected with a fastening sleeve 222. By clamping the filter body 1 in the mounting groove 22, each mounting ear 13 is respectively sleeved on the positioning post 221, and then each fastening sleeve 222 is threadedly sleeved on the positioning post 221, so as to realize convenient disassembly and assembly of the filter body 1;

[0029] In the implementation, the surface of the metal protective cover 2 is provided with an inspection notch 211, the inner wall of the inspection notch 211 is provided with a circle of silicone strips 212, an inspection cover plate 21 is provided in the inspection notch 211, fixing screws are provided at the four corners of the inspection cover plate 21, and a fixing clamp ring 213 is provided on the bottom surface of the inspection cover plate 21. When installing, the fixing clamp ring 213 of the inspection cover plate 21 is clamped in the inspection notch 211, and the outer wall of the fixing clamp ring 213 and the silicone strip 212 are in contact with each other to improve the waterproof performance, and then the inspection cover plate 21 is installed in the inspection notch 211 by using the fixing screws to realize convenient disassembly and assembly;

[0030] like Figure 3 As shown, during implementation, it also includes: a heat dissipation structure 3, the heat dissipation structure 3 includes a heat dissipation fin 31 embedded in the bottom surface of the metal protective cover 2, and a thermally conductive silicone 32 arranged on the inner wall of the mounting groove 22. The thermally conductive silicone 32 and the heat dissipation fin 31 are used to dissipate the heat of the filter body 1, thereby achieving heat dissipation while protecting it from damage, thereby preventing the filter body 1 from being damaged due to excessive temperature.

[0031] like Figures 1 to 3 As shown, in this embodiment, it is also necessary to explain that when the application document is implemented, an anti-electromagnetic interference bandpass filter is selected, wherein the working principle and product description of the filter body 1 refer to the commercially available products of the prior art on the market. This application document only improves the shortcomings of the existing filter, which only relies on its own shell for protection, has poor protection effect, is easily deformed and damaged by external force collision, and is easy to damage the internal components of the filter, and has poor overall heat dissipation effect. It only involves external protection issues and does not involve other aspects of the internal components; the working principle of this anti-electromagnetic interference bandpass filter is introduced as follows:

[0032] During installation, the operator first clamps the filter body 1 in the installation groove 22, and allows the input port 11 and the output port 12 to pass through the bayonet holes on both sides of the metal protective cover 2, so that each mounting ear 13 is respectively sleeved on the positioning column 221. At this time, the bottom surface of the filter body 1 is against the thermal conductive silicone 32, and then each fastening sleeve 222 is threadedly sleeved on the positioning column 221, so as to realize the convenient disassembly and assembly of the filter body 1;

[0033] Then, the fixing ring 213 of the inspection cover 21 is clamped in the inspection notch 211, and the outer wall of the fixing ring 213 and the silicone strip 212 are in contact with each other to improve the waterproof performance, and then the inspection cover 21 is installed in the inspection notch 211 by using fixing screws to realize the disassembly and assembly of the inspection cover 21;

[0034] When the filter body 1 is in use, the heat of the filter body 1 is dissipated by utilizing the rubber protective sleeve 23, the rubber protective pad 214, the thermally conductive silicone 32 and the heat dissipation fins 31, so that the internal components of the filter body 1 can be effectively protected, and the filter body 1 is not easily deformed and damaged by external force collision. At the same time, heat dissipation can be achieved, which can avoid the filter body 1 from being damaged due to excessive temperature, thereby extending the service life of the filter body 1.

[0035] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. An electromagnetic interference resistant bandpass filter, comprising a filter body (1) and an input port (11) and an output port (12) arranged on both sides of the filter body (1); It is characterized in that Also includes: A metal protective cover (2), wherein the inner wall of the metal protective cover (2) is provided with a mounting groove (22), the filter body (1) is arranged in the mounting groove (22), the outer wall surface of the metal protective cover (2) is wrapped with a layer of rubber protective sleeve (23), and a plurality of protruding rods are arranged on the rubber protective sleeve (23); A heat dissipation structure (3), the heat dissipation structure (3) comprising heat dissipation fins (31) embedded in the bottom surface of the metal protective cover (2) and heat-conductive silica gel (32) arranged on the inner wall of the installation groove (22).

2. The anti-electromagnetic interference bandpass filter according to claim 1, characterized in that: Positioning posts (221) are provided at the four corners of the installation groove (22), and the outer wall surface of each positioning post (221) is provided with an external thread. Mounting ears (13) are provided at the four corners of the filter body (1), and each mounting ear (13) is respectively sleeved on the positioning post (221), and each positioning post (221) is threadedly connected with a fastening sleeve (222).

3. The anti-electromagnetic interference bandpass filter according to claim 1, characterized in that: The surface of the metal protective cover (2) is provided with an inspection notch (211), and the inner wall of the inspection notch (211) is provided with a circle of silicone strips (212).

4. The anti-electromagnetic interference bandpass filter according to claim 3, characterized in that: An inspection cover plate (21) is arranged in the inspection notch (211), fixing screws are arranged at the four corners of the inspection cover plate (21), and a fixing clamp ring (213) is arranged on the bottom surface of the inspection cover plate (21).

5. The anti-electromagnetic interference bandpass filter according to claim 4, characterized in that: A layer of rubber protective pad (214) is provided on the surface of the inspection cover plate (21), and a plurality of protruding rods are provided on the rubber protective pad (214).

6. The anti-electromagnetic interference bandpass filter according to claim 1, characterized in that: The two sides of the metal protective cover (2) are penetrated by bayonet holes for installing the input port (11) and the output port (12).

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