CN213603049U

CN213603049U - Electromagnetic compatibility cabinet

Info

Publication number: CN213603049U
Application number: CN202022523649.5U
Authority: CN
Inventors: 姜威; 郑成亮; 姜铭阅
Original assignee: Beijing Siyuda Electrical Equipment Co ltd
Current assignee: Beijing Siyuda Electrical Equipment Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-07-02
Anticipated expiration: 2030-11-04

Abstract

The utility model relates to an electromagnetic compatibility cabinet belongs to power equipment technical field, has solved the technical problem that current quick-witted case electromagnetic shield efficiency is low. The utility model discloses an electromagnetic compatibility cabinet, which comprises a cabinet body and a cabinet door, wherein the frame of the cabinet body is formed by welding metal section bars in a seam all-welded mode; the cabinet body is connected with the cabinet door through a hinge; the side wall of the cabinet door or the cabinet body is provided with a vent hole; the contact surfaces of the cabinet body and the cabinet door are made of conductive materials; the cabinet body is provided with a wire passing hole of a wire, the wire passing hole is sealed through a conductive material, and the wire is in contact with the conductive material arranged on the wire passing hole when passing through the wire passing hole. The utility model discloses an electromagnetic compatibility cabinet is through mode welded forming, the electric conductivity of guaranteeing the connection structure contact surface that the seam welds entirely to it is sealed to set up conducting material in the line hole, can effectively reduce the electromagnetism and reveal, improves electromagnetic shielding efficiency.

Description

Electromagnetic compatibility cabinet

Technical Field

The utility model relates to a power equipment technical field especially relates to an electromagnetic compatibility cabinet.

Background

The various operating electric devices are mutually associated and influenced in three modes of electromagnetic conduction, electromagnetic induction and electromagnetic radiation, and can cause interference, influence and harm to the operating devices and personnel under certain conditions.

Shielding is generally divided into two types: one is electrostatic shielding, which is mainly used to prevent the influence of electrostatic field and constant magnetic field, and the other is electromagnetic shielding, which is mainly used to prevent the influence of alternating electric field, alternating magnetic field and alternating electromagnetic field. The electrostatic shield should have two basic points, namely a perfect shield and a good ground. Electromagnetic shielding requires good grounding and good conductive continuity of the shield, and in order to meet the electromagnetic compatibility requirement, high-conductivity materials such as copper plates, copper foils, aluminum plates, aluminum foils, steel plates or metal plating layers, and conductive coatings are often used as shielding materials. In practical shielding, the effectiveness of electromagnetic shielding is more dependent on the structure of the chassis, i.e. continuity of electrical conduction. Seams, openings and the like on the case are leakage sources of electromagnetic waves. Cables running through the cabinet are also a major cause of reduced shielding effectiveness.

Therefore, how to improve the electromagnetic shielding effectiveness of the existing chassis is an important technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electromagnetic compatibility cabinet to solve the technical problem that current quick-witted case electromagnetic shield efficiency is low.

The utility model provides an electromagnetic compatibility cabinet, which comprises a cabinet body and a cabinet door, wherein the frame of the cabinet body is formed by welding metal section bars in a seam all-welded mode; the cabinet body is connected with the cabinet door through a hinge; the side wall of the cabinet door or the cabinet body is provided with a vent hole; the contact surfaces of the cabinet body and the cabinet door are made of conductive materials; the cabinet body is provided with a wire passing hole of a wire, the wire passing hole is sealed through a conductive material, and the wire is in contact with the conductive material arranged on the wire passing hole when passing through the wire passing hole.

Preferably: the cabinet door comprises a front cabinet door and a rear cabinet door.

Preferably: the front cabinet door is a single door; the back cabinet door is a double-door.

Preferably: the cabinet door is provided with modular ventilation holes, and the aperture of each ventilation hole is smaller than 5 mm.

Preferably: the aperture of the vent hole is 2-3 mm.

Preferably: and one surface of the cabinet body, which is in contact with the ground, is made of a conductive material.

Preferably: the mounting component on the frame is provided with an electromagnetic sealing gasket at the position contacted with the frame; an electromagnetic sealing gasket is arranged between the contact surfaces of the cabinet body and the cabinet door.

Preferably: the frame of the cabinet body is formed by welding Q235 metal profiles.

Preferably: and one surface of the mounting component on the frame, which is in contact with the frame, is made of a conductive material.

Preferably: the cabinet body is provided with a grounding wire.

The utility model has the advantages that: the utility model discloses an electromagnetic compatibility cabinet is through mode welded forming, the electric conductivity of guaranteeing the connection structure contact surface that the seam welds entirely to it is sealed to set up conducting material in the line hole, can effectively reduce the electromagnetism and reveal, improves electromagnetic shielding efficiency, the utility model discloses the beneficial effect of other preferred embodiments is found following explanation in detail.

Drawings

FIG. 1 is a schematic structural diagram of a front cabinet door of an electromagnetic compatibility cabinet in an embodiment;

FIG. 2 is a schematic structural diagram of a rear cabinet door of the electromagnetic compatibility cabinet in the embodiment;

FIG. 3 is a schematic structural diagram of an inner side of the electromagnetic compatibility cabinet in the embodiment;

FIG. 4 is a schematic structural view of the inner bottom surface of the electromagnetic compatibility cabinet in the embodiment;

FIG. 5 is a partial enlarged view of portion A of FIG. 1;

in the figure: 1. a cabinet body; 11. a wire passing hole; 21. a front cabinet door; 22. a rear cabinet door; 3. a ventilation zone; 31. a vent hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

The embodiment provides an electromagnetic compatibility cabinet, which comprises a cabinet body 1 and a cabinet door, wherein a frame of the cabinet body 1 is formed by welding metal sectional materials in a seam all-welded mode; in the embodiment, a Q235 metal section is selected, and the cabinet body 1 is connected with the cabinet door through a hinge; the contact surfaces of the cabinet body 1 and the cabinet door are made of conductive materials; the frame of the cabinet 1 is formed by welding. The installation part on the frame, for example shrouding, top surface etc. is conducting material with the one side that the frame contacted, and each part junction all is electrically conductive to make whole electromagnetic compatibility cabinet become a continuous electric conductor, can prevent effectively that the electromagnetism from permeating through the connecting gap on the cabinet body 1 and revealing.

In this embodiment, the contact surface between the cabinet body 1 and the cabinet door, the contact surface between the frame upper sealing plate and the top surface are all metal profile surfaces in a non-paint state, and in order to further improve the conductivity of the joints of the components and reduce the electromagnetic leakage at the gap of the cabinet body 1, the electromagnetic sealing gasket is arranged at the contact part between the mounting component on the frame and the frame; an electromagnetic sealing gasket is arranged between the contact surfaces of the cabinet body 1 and the cabinet door; the electromagnetic gasket is a conductive elastomeric material that maintains conductive continuity at the gap. The electromagnetic sealing gasket in this embodiment may be selected from conductive rubber, double conductive rubber, metal woven mesh, spiral tube gasket, oriented metal conductive rubber, and the like.

In addition, because the chassis needs to be ventilated and cooled, the chassis needs to be provided with a vent hole 31, and in this embodiment, the cabinet door is provided with the vent hole 31; the electromagnetic leakage of the opening in the housing is related to the shape of the opening, the characteristics of the radiation source and the distance from the radiation source to the opening. The shielding effectiveness requirements can be improved by appropriate design of the aperture size and the radiation source to aperture distance. In this embodiment, be equipped with the ventilation hole 31 of modulization on the cabinet door, the region at ventilation hole 32 place forms the ventilation zone, and the aperture of ventilation hole 31 is less than 5 mm. The aperture of the vent hole 31 in this embodiment is 2-3 mm. For convenient to use and increase ventilation area, the cabinet door includes preceding cabinet door 21 and back cabinet door 22, and preceding cabinet door 21 is single to open the door, and back cabinet door 22 is two to open the door, all is equipped with ventilation zone 3 on preceding cabinet door 21 and the back cabinet door 22.

The locations where the ventilation holes 31 need to be provided can also be replaced by perforated metal plates, where the diameter of the perforations needs to be small enough to achieve the desired shielding effectiveness. When the requirement on ventilation quantity is high, a cut-off waveguide ventilation plate or a honeycomb plate must be used, otherwise the requirements on shielding and ventilation quantity cannot be balanced. If the shielding requirements are not high and the environmental conditions are good, a honeycomb panel made of aluminum foil may be used. This product is inexpensive, but has poor strength and is easily damaged. If the shielding requirement is high or the environment is severe (such as military environment), a copper or steel honeycomb plate is used, and the product has excellent performance in all aspects but is high in price. Such as computer display screens, etc., both to meet visual needs and to meet electromagnetic leakage prevention requirements. High performance mask windows are typically added in front of the display screen.

Since the direct through-connection of the lines on the housing would cause severe electromagnetic leakage, no direct through-connection of the lines on the housing would be allowed. When the wires must pass through the cabinet, appropriate filters must be used, or the wires must be properly shielded. A filter is a frequency-selective device that filters electromagnetic waves, allowing certain frequency components in the signal to pass through, while significantly attenuating other frequency components. By using the frequency selection function of the filter, interference noise can be filtered out or spectrum analysis can be carried out. In this embodiment, the wire passing hole 11 of the wire on the cabinet body 1 is sealed by a conductive material, and the wire is in contact with the conductive material arranged on the wire passing hole 11 when passing through the wire passing hole 11.

In order to improve the conductivity between the electromagnetic compatibility cabinet and the ground in the embodiment: one surface of the cabinet body 1, which is in contact with the ground, is made of a conductive material, and the metal section on the surface of the cabinet body 1, which is in contact with the ground, is ensured to be in a paint-free state; the cabinet body 1 is also provided with a grounding wire, four square grounding wires are selected in the embodiment, good grounding has good shielding effect on an electromagnetic field, and a large amount of charges accumulated on the equipment shell can be released, so that the electrostatic discharge effect is avoided.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The electromagnetic compatibility cabinet is characterized by comprising a cabinet body (1) and a cabinet door, wherein a frame of the cabinet body (1) is formed by welding metal profiles in a seam all-welding mode; the cabinet body (1) is connected with the cabinet door through a hinge; the side wall of the cabinet door or the cabinet body (1) is provided with a vent hole (31); the contact surfaces of the cabinet body (1) and the cabinet door are made of conductive materials; the cabinet body (1) is provided with a wire passing hole (11) of a wire, the wire passing hole (11) is sealed through a conductive material, and the wire is in contact with the conductive material arranged on the wire passing hole (11) when passing through the wire passing hole (11).

2. The electromagnetic compatibility cabinet of claim 1, wherein: the cabinet door comprises a front cabinet door (21) and a rear cabinet door (22).

3. The electromagnetic compatibility cabinet of claim 2, wherein: the front cabinet door (21) is a single-door, and the rear cabinet door (22) is a double-door.

4. The electromagnetic compatibility cabinet of claim 2, wherein: the cabinet door is provided with modularized ventilation holes (31), and the aperture of the ventilation holes (31) is smaller than 5 mm.

5. The electromagnetic compatibility cabinet of claim 4, wherein: the aperture of the vent hole (31) is 2-3 mm.

6. The electromagnetic compatibility cabinet of claim 1, wherein: and one surface of the mounting part on the frame, which is in contact with the frame, is made of a conductive material.

7. The electromagnetic compatibility cabinet of claim 1, wherein: one surface of the cabinet body (1) contacting with the ground is made of conductive materials.

8. The electromagnetic compatibility cabinet of claim 1, wherein: the mounting component on the frame is provided with an electromagnetic sealing gasket at the position contacted with the frame; an electromagnetic sealing gasket is arranged between the contact surfaces of the cabinet body (1) and the cabinet door.

9. The electromagnetic compatibility cabinet of claim 1, wherein: the frame of the cabinet body (1) is formed by welding Q235 metal profiles.

10. The electromagnetic compatibility cabinet of claim 1, wherein: the cabinet body (1) is provided with a grounding wire.