CN210671185U - Shielded waveguide device - Google Patents

Abstract

The utility model relates to a shielding waveguide device, including honeycomb core and fixed frame, the honeycomb core is fixed in the fixed frame, fixed frame is h type structure, fixed frame with the position that the honeycomb core is connected is U type structure, four peripheries of honeycomb core imbed respectively in the U type structure of fixed frame, wherein, set up a plurality of shielding waveguide holes in the honeycomb core, the cross-section in shielding waveguide hole is regular hexagon, the hole depth in shielding waveguide hole is 47mm, and the aperture is 5.2 mm. The utility model discloses a set up the shielding waveguide hole in the honeycomb core into the bore depth and be 47mm, the aperture is 5.2mm, under the condition that does not influence shielding effect, has effectively reduced the windage coefficient, has improved the efficiency of ventilation.

Description

Shielded waveguide device

Technical Field

The utility model belongs to the technical field of the electromagnetic shield ventilation, concretely relates to shielding waveguide device.

Background

The honeycomb type cut-off waveguide ventilating plate is mainly applied to necessary ventilating openings of electronic equipment, and is mainly used for electromagnetic shielding rooms, microwave dark rooms, shielding square cabins and ship ventilating openings on ships, the device can have double functions of firm EMI shielding and good ventilation, the ventilating waveguide window has different materials, coatings and shapes according to different use occasions and different use environments of military and civil use, the ventilating waveguide window is a cut-off waveguide bundle consisting of a plurality of small cut-off waveguides, the cross section of the ventilating waveguide window is hexagonal, and the total length of the cross section of the ventilating cut-off waveguide window is as follows: the square and hexagonal waveguides allow less wave form to propagate than the circular waveguides, so the isolation of electromagnetic wave is more favorable, the channel area of the hexagonal waveguide is larger than that of the square waveguide window under the condition of equal insertion attenuation capacity, the ventilation waveguide window usually adopts the hexagonal ventilation waveguide window, and the common specification is as follows: 10mm, 5mm, 3.2mm, there are two kinds of ware mounting forms: the bolt crimping type and the welding type are used in CSAC, and the performance of the welding type is higher than that of the bolt crimping type.

Although the existing waveguide ventilation board has a good shielding effect, the existing waveguide ventilation board still has high wind resistance.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a shielding waveguide device, including honeycomb core and fixed frame, the honeycomb core is fixed in the fixed frame, fixed frame is h type structure, fixed frame with the position that the honeycomb core is connected is U type structure, four peripheries of honeycomb core imbed respectively in the U type structure of fixed frame, wherein, set up a plurality of shielding waveguide holes in the honeycomb core, the cross-section in shielding waveguide hole is regular hexagon, the hole depth in shielding waveguide hole is 47mm, and the aperture is 5.2 mm.

Preferably, the fixing frame is provided with fixing holes.

In any of the above aspects, it is preferable that a rubber pad is disposed at a connection position of the fixed frame and the honeycomb core.

In any of the above aspects, preferably, the honeycomb core is an aluminum honeycomb core.

In any of the above embodiments, preferably, a gasket is provided at an edge position of the fixed frame.

In any of the above aspects, preferably, the pad is a wire mesh combination pad.

The utility model has the advantages that: the utility model discloses a set up the shielding waveguide hole in the honeycomb core into the bore depth and be 47mm, the aperture is 5.2mm, under the condition that does not influence shielding effect, has effectively reduced the windage coefficient, has improved the efficiency of ventilation.

Drawings

Fig. 1 is a schematic view of a preferred embodiment of a shielded waveguide device according to the present invention;

fig. 2 is a left side view of the fig. 1 embodiment of a shielded waveguide assembly in accordance with the present invention;

fig. 3 is a rear view of the fig. 1 embodiment of a shielded waveguide assembly in accordance with the present invention.

The figures are labeled as follows: 1-fixing the frame; 2-a liner; 3-fixing holes; 4-a honeycomb core; 5-rubber pad.

Detailed Description

In order to further understand the present invention, the present invention will be described in detail with reference to the following embodiments.

Example one

As shown in fig. 1 to 3, the present invention provides a shielded waveguide device, which comprises a honeycomb core 4 and a fixed frame 1, wherein the honeycomb core 4 is fixed in the fixed frame 1, specifically, the fixed frame is an h-shaped structure, the position where the fixed frame 1 is connected with the honeycomb core 4 is a U-shaped structure, four peripheries of the honeycomb core 4 are respectively embedded in the U-shaped structure of the fixed frame 1, wherein a plurality of shielded waveguide holes are arranged in the honeycomb core 4, the cross section of the shielded waveguide holes is regular hexagon, the hole depth of the shielded waveguide holes is 47mm, the hole diameter is 5.2mm, the fixed frame 1 is provided with fixing holes 3, the utility model can be fixed through the fixing holes 3, a rubber pad 5 is arranged at the connecting position of the fixed frame 1 and the honeycomb core 4, the silica gel pad 5 can make the combination of the fixed frame 1 and the honeycomb core 4 softer, the damage between the honeycomb core 4 and the fixed frame 1 can be reduced during vibration, the honeycomb core is made of aluminum, the gasket 2 is arranged at the edge position of the fixed frame 1, and the gasket 2 is a wire mesh combined gasket.

Example two

Wind resistance characteristic comparison: table 1: wind resistance test result of aperture of 5.2mm with thickness of 47mm

Note: the effective area of the measured piece is 300mm by 300mm

Table 2: test results for wind resistance of 3.2mm aperture 40mm thick (traditional setup)

Note: the effective area of the measured piece is 300mm by 300mm

Can know by table 1 and table 2, through chooseing for use the utility model discloses a honeycomb core 4 in the thick 5.2mm aperture of 47mm, make the utility model discloses the coefficient of resistance that produces during the ventilation is lower, more does benefit to the ventilation, and the honeycomb core 4 of aluminium system can be by the regular hexagon cellular shield part that ordinary aluminium foil formed through special technology processing, has advantages such as the air volume is big, light in weight and better anti electrochemical corrosion performance, is that present all kinds of electronic equipment especially for military use equipment uses more shielding ventilation part, and is the same at aluminium system honeycomb aperture, and the material is the same, under the condition that thickness equals the silk screen combination liner that shielding performance is excellent has been installed additional in fixed frame 1, has both ensured the portable installation and the maintenance of ventilation window, has prevented again the electromagnetism of gap department between fixed frame 1 and installing frame leaks.

Table 3: shielding effect

Frequency of

14KHZ

100KHZ

100MHZ

450MHZ

1GHZ

10GHZ

18GHZ

40GHZ

Shielding effect

≥100dB

≥110dB

≥120dB

≥140dB

≥140dB

≥130dB

≥120dB

≥100dB

As can be seen from the upper table, the utility model discloses good shielding effect has.

The shielding mechanism, shielding performance and wind resistance characteristics of different types of shielding ventilation parts are different, shielding and ventilation requirements are mainly considered in engineering design, and comprehensive requirements such as volume, weight, cost, dust prevention, corrosion prevention and the like are considered, so that a proper shielding ventilation part is selected, and the comprehensive performance comparison of the shielding ventilation parts (materials) is performed below.

Table 4: comparison of the Properties of Honeycomb cores of different materials

Table 4 shows that the wind resistance is a characteristic without a dust screen, and if the dust screen is added, the wind resistance is increased to a certain extent; because the foamed metal ventilation window material is made of metal, compared with other common dustproof materials, the foamed metal ventilation window material can be used for filtering high-temperature gas or corrosive gas, and a user can select a proper material of the honeycomb core according to the parameters.

It will be understood by those skilled in the art that the shielded waveguide device of the present invention includes any combination of the above-described embodiments and embodiments of the present invention and the various parts shown in the drawings, which are limited to space and are not described in detail for the sake of brevity. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a shielded waveguide device, includes honeycomb core and fixed frame, the honeycomb core is fixed in the fixed frame, fixed frame is h type structure, fixed frame with the position that the honeycomb core is connected is U type structure, four peripheries of honeycomb core imbed respectively in the U type structure of fixed frame, its characterized in that, set up a plurality of shielded waveguide holes in the honeycomb core, the cross-section in shielded waveguide hole is regular hexagon, the hole depth in shielded waveguide hole is 47mm, and the aperture is 5.2 mm.

2. The shielded waveguide device of claim 1, wherein the fixing frame is provided with fixing holes.

3. The shielded waveguide device of claim 1, wherein a rubber pad is disposed at a connection position of the fixed frame and the honeycomb core.

4. The shielded waveguide device of claim 1, wherein the honeycomb core is an aluminum honeycomb core.

5. The shielded waveguide device of claim 1, wherein a gasket is disposed at an edge position of the fixed bezel.

6. The shielded waveguide device of claim 5, wherein the gasket is a wire mesh composite gasket.

Images