CN211348376U - Electric wave absorber for microwave anechoic chamber - Google Patents
Electric wave absorber for microwave anechoic chamber Download PDFInfo
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- CN211348376U CN211348376U CN201922144555.4U CN201922144555U CN211348376U CN 211348376 U CN211348376 U CN 211348376U CN 201922144555 U CN201922144555 U CN 201922144555U CN 211348376 U CN211348376 U CN 211348376U
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Abstract
The utility model relates to a wave absorber for microwave anechoic chamber, which comprises a bottom plate, wherein the bottom plate is fixedly connected with a plurality of pyramid-shaped wave absorbing unit bodies, each wave absorbing unit body comprises a wave absorbing layer, and a plurality of layers of flame retardant fiber layers which are mutually spaced are compounded in the wave absorbing layer; the bottom plate is fixedly connected with a plurality of heat conduction supporting pieces which are embedded in the electric wave absorption unit bodies; the outer wall of the electric wave absorption unit body is sleeved with a flame retardant body which isolates the electric wave absorption unit body from air. The utility model discloses have the fire resistance and eliminate the effect of the conflagration hidden danger that exists in the use well. The problems that the flame retardance of the electric wave absorber is poor and fire hazards exist are solved.
Description
Technical Field
The utility model belongs to the technical field of the darkroom wave-absorbing equipment and specifically relates to a radio wave absorber for microwave anechoic chamber is related to.
Background
The anechoic chamber is used for measuring various characteristics of the antenna or measuring electric waves of an electronic device. In a anechoic chamber used for such measurement, a radio wave absorber is mounted on a wall, a ceiling, a floor, or the like so as to shield the intrusion of radio waves from the outside and prevent radio waves generated by an internal device to be measured from being radiated to the outside. Referring to fig. 4, a conventional radio wave absorber 100 has a hollow quadrangular frustum shape in appearance and has four adjacent triangular absorption surfaces 101, and a bonding surface 102 is formed at the bottom end of each absorption surface 101; the binding surface 102 is fixedly connected with the bottom plate 4; the radio wave absorber 100 is a resin foam impregnated with carbon black, which is a conductive material. The resin foam material is easy to burn, and toxic and harmful gases can be generated in the burning process, so that fire hazard exists in the using process of the electric wave absorber. The technical scheme has the problems that the electric wave absorber is poor in flame retardance and has fire hazard.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, it is an object of the present invention to provide an electric wave absorber for a microwave anechoic chamber, which can improve flame retardancy.
The method is realized by the following technical scheme: a radio wave absorber for a microwave anechoic chamber comprises a bottom plate, wherein the bottom plate is fixedly connected with a plurality of pyramid-shaped radio wave absorbing unit bodies, each radio wave absorbing unit body comprises a radio wave absorbing layer, and a plurality of layers of flame-retardant fiber layers which are mutually spaced are compounded in each radio wave absorbing layer; the bottom plate is fixedly connected with a plurality of heat conduction supporting pieces which are embedded in the electric wave absorption unit bodies; the outer wall of the electric wave absorption unit body is sleeved with a flame retardant body which isolates the electric wave absorption unit body from air.
By adopting the technical scheme, the electric wave absorption unit body absorbs heat from the outside and transmits the heat to the flame-retardant fiber layer, and the flame-retardant fiber layer can quickly absorb the transmitted heat to enable the resin structure in the electric wave absorption unit body to be below a combustible point, so that the flame retardant property of the electric wave absorption unit body can be effectively improved; the electric wave absorption unit body absorbs heat from the outside and transfers the heat to the heat conduction supporting piece, the heat conduction of the heat conduction supporting piece is good, the transferred heat can be released to the outside, the flame retardant property of the electric wave absorption unit body is further improved, and the heat conduction supporting piece has good supporting property and prevents the electric wave absorption unit body from being deformed under stress to influence the electric wave absorption capacity; the flame retardant body can make electric wave absorption unit body and external isolated, and external heat at first transmits to the flame retardant body, and the flame retardant body can not burn and the heat conductivity is good, can just reduce the transmission to electric wave absorption unit body heat in can releasing the absorption heat to external, can effectively protect electric wave absorption unit body structure not destroyed and improve the flame retardant property of electric wave absorption unit body, the utility model discloses a flame retardant property is good, eliminates conflagration hidden danger and guarantees personnel's safety in the darkroom.
The utility model discloses further set up to: and the electric wave absorption layer is internally compounded with a heat conduction layer positioned between adjacent flame-retardant fiber layers.
By adopting the technical scheme, the heat conducting layer uniformly disperses the heat absorbed by the electric wave absorption unit bodies to each flame-retardant fiber layer, so that the electric wave absorption performance is prevented from being reduced due to deformation and distortion caused by local heating of the electric wave absorption unit bodies; meanwhile, heat is uniformly guided to the flame-retardant fiber layer, so that the electric wave absorption layer is not easy to burn, and the flame retardant property of the electric wave absorption unit body is further improved.
The utility model discloses further set up to: the upper surface and the lower surface of the heat conduction layer are wavy.
Through adopting above-mentioned technical scheme, the wave surface of heat-conducting layer has increased the area of contact of heat-conducting layer and electric wave absorbing layer, and the heat conduction area of heat-conducting layer increases promptly to make the even and quick direction flame retardant fiber layer of electric wave absorbing layer absorbed heat make the difficult emergence burning of electric wave absorbing layer further promote the fire behaviour of electric wave absorbing unit body.
The utility model discloses further set up to: the heat conduction support piece comprises a heat conduction outer layer and a supporting layer, wherein the heat conduction outer layer is in contact with the inner wall of the electric wave absorption unit body, the supporting layer is bonded with the heat conduction outer layer, and the heat conduction support piece is hollow.
Through adopting above-mentioned technical scheme, the outer energy that absorbs the electric wave absorbed layer transmission fast of heat conduction and transmit to the supporting layer fast, inside the supporting layer heat conductivility is good can release the heat to heat conduction support piece to holistic fire behaviour has been strengthened.
The utility model discloses further set up to: and a heat-conducting inner layer is adhered to the inner wall of the supporting layer.
Through adopting above-mentioned technical scheme, the area of contact of heat conduction inlayer and air is big, and heat dispersion is good, can be quick release the energy of supporting layer to the air with the heat energy form, effectively reduce the temperature of heat conduction support piece and electric wave absorption unit body to promote holistic fire behaviour.
The utility model discloses further set up to: the flame retardant body comprises an inner glass flame retardant layer which is in contact with the outer wall of the electric wave absorption unit body and an outer flame retardant coating which is coated on the surface of the inner glass flame retardant layer.
By adopting the technical scheme, the inner glass flame-retardant layer is in contact with the outer wall of the electric wave absorption unit body and isolates the electric wave absorption unit body from air, so that the electric wave absorption unit body is not easy to burn due to isolation of oxygen; the inner glass flame-retardant layer is an inorganic substance which does not support combustion, has high melting point and is not easy to be fused, and can isolate the electric wave absorption unit body from being in direct contact with an external heat source, so that the structure of the electric wave absorption unit body is not damaged and the wave absorption performance is good; the outer flame-retardant coating can effectively absorb external heat energy to reduce the heat energy transferred to the inner glass flame-retardant layer, and the structural stability and the integral flame retardance of the electric wave absorption unit body are guaranteed.
The utility model discloses further set up to: at least two glass fiber layers are filled in the inner glass flame-retardant layer; the inner glass fire-retardant layer is integrally formed with insulating voids between adjacent fiberglass layers.
By adopting the technical scheme, the glass fiber layer can effectively improve the impact resistance and the overall strength of the flame retardant body, prevent the flame retardant body from being damaged by external impact and better protect the electric wave absorption unit body structure from being damaged; the glass fiber layer can improve the melting point of the flame retardant body, further prevent the flame retardant body from being burnt and melted, and better protect the electric wave absorption unit body; the heat insulation gap can effectively reduce the temperature of the contact surface of the flame retardant body and the electric wave absorption unit body, and prevent the electric wave absorption unit structure from being damaged due to overhigh temperature of the contact surface of the flame retardant body and the electric wave absorption unit body.
The utility model discloses further set up to: the upper surface and the lower surface of the bottom plate are provided with longitudinal air dispersing holes communicated with the interior of the heat conduction supporting piece in a penetrating way; the side surface of the bottom plate is provided with a transverse air dispersing hole communicated with the longitudinal air dispersing hole in a penetrating way; the transverse air dispersing holes and the longitudinal air dispersing holes form heat dissipation channels.
Through adopting above-mentioned technical scheme, heat dissipation channel leads the heat of the inside gathering of heat conduction support piece fast the utility model discloses an in the external world of placing, can effectively reduce the inside heat gathering of heat conduction support piece, reduce holistic temperature, promote holistic fire behaviour.
To sum up, the utility model has the advantages of it is following:
1. through bottom plate, electric wave absorption unit body, electric wave absorbed layer, flame retardant fiber layer, heat conduction support piece and fire-retardant body, realized the structure of effective protection electric wave absorption unit body, effectively promote holistic fire behaviour, eliminate the potential safety hazard, make the utility model discloses safe and reliable more.
2. Through thermal-insulated space, outer flame retardant coating, glass fiber layer and interior glass fire-retardant layer, realized effectively promoting the impact resistance of fire-retardant body, prevented to receive external impact damage, can be better the protection electric wave absorption unit body structure not damaged.
3. Through vertical scattered gas pocket, horizontal gas pocket, heat dissipation channel and bottom plate of loosing, lead the heat of the inside gathering of heat conduction support piece fast the utility model discloses an in the external world of placing, can effectively reduce the inside heat gathering of heat conduction support piece, reduce holistic temperature, promote holistic fire behaviour.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of a partial structure of the present invention.
Fig. 3 is a structural sectional view of the present invention.
Fig. 4 is a schematic diagram of a prior art structure.
In the figure, 1, a radio wave absorption unit body; 100. a radio wave absorber; 101. an absorbent surface; 102. a binding face; 11. an electric wave absorbing layer; 12. a flame-retardant fiber layer; 2. a thermally conductive support; 13. a heat conductive layer; 21. a heat-conducting outer layer; 22. a support layer; 23. a thermally conductive inner layer; 3. a flame retardant body; 31. a flame retardant coating; 32. an inner glass fire retardant layer; 321. a glass fiber layer; 322. a thermally insulating void; 4. a base plate; 41. longitudinal air dispersing holes; 42. transverse air dispersing holes; 43. and a heat dissipation channel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the utility model discloses a wave absorber for microwave anechoic chamber, including bottom plate 4, bottom plate 4 fixedly connected with a plurality of wave absorbing unit bodies 1 that are cavity quadrangular frustum of a pyramid form. Referring to fig. 3, the radio wave absorbing unit body 1 includes a radio wave absorbing layer 11, and a plurality of flame retardant fiber layers 12 are compounded in the radio wave absorbing layer 11 and spaced from each other. The electric wave absorption unit body 1 absorbs heat from the outside and transfers the heat to the flame-retardant fiber layer 12, and the flame-retardant fiber layer 12 is formed by weaving glass fibers into a glass fiber net and compounding the glass fiber net in the electric wave absorption layer 11. The flame-retardant fiber layer 12 can rapidly absorb the transferred heat to enable the resin structure in the electric wave absorption unit body 1 to be below the combustible point, so that the flame retardant property of the electric wave absorption unit body 1 can be effectively improved. The electric wave absorbing layer 11 is compounded with a heat conductive layer 13, preferably an aluminum alloy foil layer, between the adjacent flame retardant fiber layers 12. The heat conduction layer 13 uniformly disperses the heat absorbed by the electric wave absorption unit body 1 to each flame-retardant fiber layer 12, so that the electric wave absorption unit body 1 is prevented from being deformed and distorted due to local heating, and the whole electric wave absorption performance is prevented from being reduced; the heat is evenly guided to the flame-retardant fiber layer 12, the heat energy carried by the electric wave absorption layer 11 is less, the temperature of the electric wave absorption layer 11 is lower, and the electric wave absorption layer is not easy to burn, so that the flame retardant property of the electric wave absorption unit body 1 is further improved. The upper and lower surfaces of the heat conduction layer 13 are wavy, so that the contact area between the heat conduction layer 13 and the electric wave absorption layer 11 is increased, namely, the heat conduction area of the heat conduction layer 13 is increased, so that the heat absorbed by the electric wave absorption layer 11 is uniformly and quickly guided to the flame-retardant fiber layer 12, the electric wave absorption layer 11 is difficult to reach a fire point, and the flame retardance of the electric wave absorption unit body 1 is further improved due to the fact that combustion is difficult to occur.
Referring to fig. 2 and 3, a plurality of heat conductive supporters 2 fitted into the respective radio wave absorption units 1 are fixedly connected to the base plate 4. The good heat conductivity of the heat conduction supporting piece 2 can release the transferred heat to the outside, the flame retardant performance of the electric wave absorption unit body 1 is further improved, and the heat conduction supporting piece 2 has good supporting performance to prevent the electric wave absorption unit body 1 from being stressed and deformed to influence the whole electric wave absorption capacity. The heat-conducting support member 2 includes a heat-conducting outer layer 21 in contact with the inner wall of the electric wave absorption unit body 1, and the heat-conducting outer layer 21 is made of heat-conducting carbon fibers. The heat conducting outer layer 21 is bonded with a support layer 22 which is made of high-modulus carbon fiber and is hollow inside. The heat-conducting outer layer 21 can quickly absorb the energy transferred from the electric wave absorption layer 11 and can quickly transfer the energy to the support layer 22, and the support layer 22 has good heat-conducting performance and can release the heat to the inside of the heat-conducting support member 2, so that the overall flame retardant performance is enhanced. The inner wall of the supporting layer 22 is adhered with a heat-conducting inner layer 23, preferably a soft foam polyurethane plate. The contact area of the open micropores in the soft foam polyurethane board and the air is large, the heat dissipation performance is good, the energy of the supporting layer 22 can be quickly released to the air in a heat energy mode, the temperature of the heat conduction supporting piece 2 and the temperature of the electric wave absorption unit body 1 are effectively reduced, and therefore the overall flame retardant performance is improved. In order to guide the heat accumulated inside the heat conduction supporting member 2 to the outside, the upper and lower surfaces of the bottom plate 4 are provided with longitudinal air dispersing holes 41 communicated with the inside of the heat conduction supporting member 2; the side surface of the bottom plate 4 is provided with a transverse air dispersing hole 42 communicated with the longitudinal air dispersing hole 41 in a penetrating way; the lateral air dispersion holes 42 and the longitudinal air dispersion holes 41 are formed with heat dissipation passages 43. Heat dissipation channel 43 leads the heat of the inside gathering of heat conduction support piece 2 fast the utility model discloses an in the external world of placing, can effectively reduce the inside heat gathering of heat conduction support piece 2, reduce holistic temperature, promote holistic fire behaviour.
Referring to fig. 2 and 3, the outer wall of the electric wave absorption unit body 1 is sleeved with a flame retardant body 3 which isolates the electric wave absorption unit body 1 from air and is not combustible. The flame retardant body 3 comprises an inner glass flame retardant layer 32 which is contacted with the outer wall of the electric wave absorption unit body 1, and the inner glass flame retardant layer 32 is made of transparent high-temperature resistant glass; the surface of the inner glass flame-retardant layer 32 is coated with an outer flame-retardant coating 31, and the outer flame-retardant coating 31 is preferably a transparent fire-retardant coating. The inner glass flame-retardant layer 32 is in contact with the outer wall of the electric wave absorption unit body 1 and isolates the electric wave absorption unit body 1 from air, so that oxygen is isolated, and the electric wave absorption unit body 1 is not easy to burn; the inner glass flame-retardant layer 32 is made of inorganic substances, is not combusted, has high melting point, is not easily fused, can isolate the electric wave absorption unit body 1 from being directly contacted with an external heat source, and ensures that the wave absorption performance of the electric wave absorption unit body 1 is good; the outer flame-retardant coating 31 can effectively absorb external heat energy, reduce the heat energy transferred to the inner glass flame-retardant layer 32, and ensure the structural stability and the whole flame retardance of the electric wave absorption unit body 1. Two glass fiber layers 321 are filled in the inner glass flame-retardant layer 32; the inner glass fire retardant layer 32 is integrally formed with insulating voids 322 between adjacent fiberglass layers 321. The glass fiber layer 321 can effectively improve the impact resistance and the overall strength of the flame retardant body 3, prevent the flame retardant body 3 from being damaged easily due to external impact, better protect the structure of the electric wave absorption unit body 1 from being damaged, and ensure the good wave absorption performance of the electric wave absorption unit body 1. The glass fiber layer 321 can raise the melting point of the flame retardant body 3, further prevent the flame retardant body 3 from being melted, and better protect the electric wave absorption unit body 1. The heat insulation gap 322 can effectively reduce the temperature of the contact surface between the flame retardant body 3 and the electric wave absorption unit body 1, and prevent the structure of the electric wave absorption unit body 1 from being damaged due to overhigh temperature of the contact surface between the flame retardant body and the electric wave absorption unit body.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. An electric wave absorber for a microwave anechoic chamber, characterized in that: the electric wave absorption device comprises a bottom plate (4), wherein the bottom plate (4) is fixedly connected with a plurality of pyramid-shaped electric wave absorption unit bodies (1), each electric wave absorption unit body (1) comprises an electric wave absorption layer (11), and a plurality of flame-retardant fiber layers (12) which are mutually spaced are compounded in each electric wave absorption layer (11); the bottom plate (4) is fixedly connected with a plurality of heat conduction supporting pieces (2) which are embedded in the electric wave absorption unit body (1); the outer wall of the electric wave absorption unit body (1) is sleeved with a flame retardant body (3) which isolates the electric wave absorption unit body (1) from air.
2. An electric wave absorber for a microwave anechoic chamber according to claim 1, wherein: and a heat conduction layer (13) positioned between the adjacent flame-retardant fiber layers (12) is compounded in the electric wave absorption layer (11).
3. An electric wave absorber for a microwave anechoic chamber according to claim 2, wherein: the upper surface and the lower surface of the heat conduction layer (13) are wavy.
4. An electric wave absorber for a microwave anechoic chamber according to claim 1, wherein: the heat conduction support piece (2) comprises a heat conduction outer layer (21) which is in contact with the inner wall of the electric wave absorption unit body (1) and a supporting layer (22) which is bonded with the heat conduction outer layer (21), and the heat conduction support piece (2) is hollow inside.
5. An electric wave absorber for a microwave anechoic chamber according to claim 4, wherein: and a heat-conducting inner layer (23) is adhered to the inner wall of the supporting layer (22).
6. An electric wave absorber for a microwave anechoic chamber according to claim 1, wherein: the flame retardant body (3) comprises an inner glass flame retardant layer (32) contacted with the outer wall of the electric wave absorption unit body (1) and an outer flame retardant coating (31) coated on the surface of the inner glass flame retardant layer (32).
7. An electric wave absorber for a microwave anechoic chamber according to claim 6, wherein: at least two glass fiber layers (321) are filled in the inner glass flame-retardant layer (32); the inner glass fire-retardant layer (32) is integrally formed with insulating voids (322) between adjacent glass fiber layers (321).
8. An electric wave absorber for a microwave anechoic chamber according to claim 5, wherein: the upper surface and the lower surface of the bottom plate (4) are provided with longitudinal air dispersing holes (41) communicated with the interior of the heat conduction supporting piece (2) in a penetrating way; the lateral surface of the bottom plate (4) is provided with a transverse air dispersing hole (42) communicated with the longitudinal air dispersing hole (41) in a penetrating way; the transverse air diffusion holes (42) and the longitudinal air diffusion holes (41) form heat dissipation channels (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922144555.4U CN211348376U (en) | 2019-12-02 | 2019-12-02 | Electric wave absorber for microwave anechoic chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922144555.4U CN211348376U (en) | 2019-12-02 | 2019-12-02 | Electric wave absorber for microwave anechoic chamber |
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| Publication Number | Publication Date |
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| CN211348376U true CN211348376U (en) | 2020-08-25 |
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| CN201922144555.4U Active CN211348376U (en) | 2019-12-02 | 2019-12-02 | Electric wave absorber for microwave anechoic chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567471A (en) * | 2021-09-27 | 2021-10-29 | 宜宾盛纬伦科技有限公司 | Device and method for testing high-frequency wave-absorbing performance of wave-absorbing material |
-
2019
- 2019-12-02 CN CN201922144555.4U patent/CN211348376U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567471A (en) * | 2021-09-27 | 2021-10-29 | 宜宾盛纬伦科技有限公司 | Device and method for testing high-frequency wave-absorbing performance of wave-absorbing material |
| CN113567471B (en) * | 2021-09-27 | 2021-12-21 | 宜宾盛纬伦科技有限公司 | Device and method for testing high-frequency wave-absorbing performance of wave-absorbing material |
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