CN212785282U

CN212785282U - Power filter for shielding cabinet

Info

Publication number: CN212785282U
Application number: CN202021798105.3U
Authority: CN
Inventors: 张鹏飞; 曹文伟; 潘云飞; 张涛
Original assignee: Jiangsu Wamuke Electronic Technology Co Ltd
Current assignee: Jiangsu Wamuke Electronic Technology Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-03-23
Anticipated expiration: 2030-08-25

Abstract

The utility model relates to a power filter technical field just discloses a power filter for shielding rack, including the filter shell, the inside fixedly connected with inductance of filter shell, the inductance is connected with the electrical capacity of wearing the core through the wire, the surface of wearing the core electrical capacity has cup jointed insulating washer, the one end that the inductance was kept away from to the electrical capacity of wearing the core is provided with output and input respectively, the surface threaded connection of wearing the core electrical capacity has the fastener, the inside baffle that is provided with of filter shell, the fixed surface of filter shell is connected with the waveguide screw rod. This a power filter for shielding rack sets up four punching electric capacity through the inside at the wave filter shell to set up the electric capacity between the punching electric capacity of input and inductance, restrain high frequency interference signal through two electric capacity when work, and the punching electric capacity restraines low frequency interference signal, accomplishes the effect of signal shielding through several simple structures, has reached small effect.

Description

Power filter for shielding cabinet

Technical Field

The utility model relates to a power filter technical field specifically is a power filter for shielding rack.

Background

The shielding cabinet is one of cabinets, can be used for storing computers, servers and the like, can effectively prevent electromagnetic information from being leaked, prevent electromagnetic waves from damaging human bodies, prevent external interference signals from influencing the normal work of the computers or the servers, is similar to a small shielding room, and is widely applied to armies, banks, scientific research institutions, government offices and the like with higher classified grades.

The general power filter is not suitable for being used on a shielding cabinet with smaller space and volume due to large volume and heavy weight, so that the power filter which gives consideration to the requirements of electromagnetic shielding performance and volume is needed.

Therefore, the applicant proposes a power filter for shielding a cabinet, which is used for solving the problem of large volume of the general power filter proposed above.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a be not enough to prior art, the utility model provides a power filter for shielding rack possesses advantages such as small, has solved the bulky problem of traditional rack power filter who mentions among the above-mentioned background art.

(II) technical scheme

In order to realize the purpose of small volume, the utility model provides a following technical scheme: the utility model provides a power filter for shielding rack, includes the filter housing, the inside fixedly connected with inductance of filter housing, the inductance is connected with the cross core electric capacity through the wire, the surface of cross core electric capacity has cup jointed insulating washer, the one end that the inductance was kept away from to the cross core electric capacity is provided with output and input respectively, the inside baffle that is provided with of filter housing.

The filter comprises a filter shell and is characterized in that a waveguide screw is fixedly connected to the outer surface of the filter shell, a wire mesh gasket is sleeved on the outer surface of the waveguide screw, a flat gasket is arranged on one side, close to a cabinet, of the filter shell, a shielding plate is connected to one end of the waveguide screw in a penetrating mode, a nut is connected to the outer surface of the waveguide screw in a threaded mode, and a fastening piece is connected to the outer surface of the waveguide screw in.

Preferably, a capacitor is arranged at one end of the inductor close to the input end, and two ends of the capacitor are respectively connected with the inductor and the core-through capacitor wire.

Preferably, the number of the feedthrough capacitors is four, and the four feedthrough capacitors are respectively positioned on the left side and the right side inside the filter shell.

Preferably, one end of the waveguide screw is fixedly connected with the output end.

Preferably, two sides of the wire mesh gasket are respectively overlapped with the filter housing and the shielding plate, and the flat gasket surrounds four sides of the bottom of the filter housing and is overlapped with the surface of the shielding plate.

Preferably, the shield plate is located between the wire mesh washer and the nut.

Compared with the prior art, the utility model provides a power filter for shielding rack possesses following beneficial effect:

1. this a power filter for shielding rack sets up four punching electric capacity through the inside at the wave filter shell to set up the electric capacity between the punching electric capacity of input and inductance, restrain high frequency interference signal through two electric capacity when work, and the punching electric capacity restraines low frequency interference signal, accomplishes the effect of signal shielding through several simple structures, has reached small effect.

2. This a power filter for shielding rack cup joints the silk screen packing ring through the surface at the waveguide screw rod and sets up the plain washer and install whole device through the nut at the filter housing, can play the guard action to the filter housing at the in-process silk screen packing ring of installation and plain washer, and connect through a nut, can easy to assemble to reach easy to assemble and protection device's effect.

Drawings

FIG. 1 is a front sectional view of the structure of the present invention;

FIG. 2 is a top sectional view of the structure of the present invention;

FIG. 3 is a schematic view of the connection between the structure and the cabinet of the present invention;

FIG. 4 is a diagram of a conventional filter circuit;

fig. 5 is a circuit structure diagram of the present invention.

Wherein: 1. a filter housing; 2. an inductance; 3. a feedthrough capacitor; 4. an insulating washer; 5. an output end; 6. a fastener; 7. a partition plate; 8. an input end; 9. a capacitor; 10. a waveguide screw; 11. a wire mesh gasket; 12. a flat washer; 13. a shielding plate; 14. and a nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, a power filter for shielding a cabinet includes a filter housing 1, an inductor 2 is fixedly connected inside the filter housing 1, the inductor 2 is used to connect a feedthrough capacitor 3 and a capacitor 9, respectively, so that the inductor 2 generates an electromagnetic interference signal, one end of the inductor 2 near an input end 8 is provided with a capacitor 9, the capacitor 9 is divided into two capacitors, two capacitors 9 are a Cx capacitor and a Cy capacitor, respectively, for suppressing a high-frequency interference signal, two ends of the capacitor 9 are connected to the inductor 2 and the feedthrough capacitor 3 through wires, respectively, the inductor 2 is connected to the feedthrough capacitor 3 through a wire, the feedthrough capacitor 3 is used for always generating a low-frequency interference signal, the number of the feedthrough capacitors 3 is four, the four feedthrough capacitors 3 are respectively located at left and right sides inside the filter housing 1, an insulating gasket 4 is sleeved on an outer surface of the feedthrough capacitor 3, the insulating gasket 4 is used to prevent a current of the feedthrough capacitor 3 from being conducted to a surface of the, the one end that electric capacity 3 kept away from inductance 2 of wearing is provided with output 5 and input 8 respectively, and filter housing 1 is inside to be provided with baffle 7, and baffle 7 is used for keeping apart and fixed electric capacity 3 of wearing with input 8 and output 5.

The outer surface of the filter shell 1 is fixedly connected with a waveguide screw 10, the waveguide screw 10 is used for conveniently mounting the filter shell 1 on a cabinet, one end of the waveguide screw 10 is fixedly connected with an output end 5, the outer surface of the waveguide screw 10 is sleeved with a wire mesh gasket 11, the wire mesh gasket 11 is used for protecting the filter shell 1 and simultaneously improving the shielding efficiency of signals, two sides of the wire mesh gasket 11 are respectively overlapped with the filter shell 1 and a shielding plate 13, one side of the filter shell 1 close to the cabinet is provided with a flat gasket 12, the flat gasket 12 is used for protecting the filter shell 1 from being damaged due to excessive contact between the filter shell 1 and the shielding plate 13 during fixing, the flat gasket 12 surrounds four sides of the bottom of the filter shell 1 and is overlapped with the surface of the shielding plate 13, one end of the waveguide screw 10 is connected with the shielding plate 13 in a penetrating manner, and the shielding plate 13 is positioned between the, the outer surface of the waveguide screw 10 is connected with a nut 14 in a threaded manner, and the outer surface of the waveguide screw 10 is connected with a fastener 6 in a threaded manner.

As shown in FIG. 5, the performance index of the shielding cabinet is 20MHz-10GHz, which satisfies the requirement of 100dB attenuation of interference signals, the C1 capacitor and the C2 capacitor in the circuit structure diagram of the power filter of the shielding cabinet in the upper drawing mainly suppress the high-frequency interference signals of 100MHz-10GHz, and the inductor L mainly suppresses the interference signals of 20MHz-100MHz in the lower frequency band. The resistor R mainly serves to discharge the capacitance in the circuit.

When the shielding device is used, the filter housing 1 is fixed on the shielding cabinet through the waveguide screw 10, and a wire mesh gasket 11 is required to be arranged between the filter housing 1 and the shielding cabinet, so that the shielding effect is improved by protecting the filter housing 1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A power filter for shielding cabinets, comprising a filter housing (1), characterized in that: an inductor (2) is fixedly connected inside the filter shell (1), the inductor (2) is connected with a core-through capacitor (3) through a wire, an insulating gasket (4) is sleeved on the outer surface of the core-through capacitor (3), an output end (5) and an input end (8) are respectively arranged at one end, far away from the inductor (2), of the core-through capacitor (3), and a partition plate (7) is arranged inside the filter shell (1);

the filter is characterized in that a waveguide screw rod (10) is fixedly connected to the outer surface of the filter shell (1), a wire mesh gasket (11) is sleeved on the outer surface of the waveguide screw rod (10), a flat gasket (12) is arranged on one side, close to a cabinet, of the filter shell (1), one end of the waveguide screw rod (10) is connected with a shielding plate (13) in a penetrating mode, a nut (14) is connected to the outer surface of the waveguide screw rod (10) in a threaded mode, and a fastener (6) is connected to the outer surface of the waveguide screw rod (10.

2. A power filter for a shielding cabinet according to claim 1, wherein: and one end of the inductor (2) close to the input end (8) is provided with a capacitor (9), and two ends of the capacitor (9) are respectively connected with the inductor (2) and the core-through capacitor (3) through wires.

3. A power filter for a shielding cabinet according to claim 1, wherein: the filter is characterized in that the number of the core-through capacitors (3) is four, and the four core-through capacitors (3) are respectively positioned on the left side and the right side inside the filter shell (1).

4. A power filter for a shielding cabinet according to claim 1, wherein: one end of the waveguide screw rod (10) is fixedly connected with the output end (5).

5. A power filter for a shielding cabinet according to claim 1, wherein: two sides of the wire mesh gasket (11) are respectively lapped on the filter shell (1) and the shielding plate (13), and the flat gasket (12) surrounds four sides of the bottom of the filter shell (1) and is lapped on the surface of the shielding plate (13).

6. A power filter for a shielding cabinet according to claim 1, wherein: the shielding plate (13) is located between the wire mesh washer (11) and the nut (14).