Shielding device for generator and control cabinet
A technology of shielding device and control box, which is applied in the direction of shielding electromagnetic fields, etc., and can solve problems such as difficult suppression
Inactive Publication Date: 2016-12-07
JIANGXI TELLHOW MILITARY GRP CO LTD
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Problems solved by technology
From the perspective of suppressing electromagnetic field radiation, there are two problems in this connection: one is that there are many types of connection lines between the generator and the control box, including main power output lines, excitation control lines, and sensor signal control lines. etc. After these cables pa
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[0010] Such as figure 1 As shown, it is composed of control box 1, conductive glass window door 2, shielded generator 3, connector 4, fastener 5, lower pipe flange connection plate 6, upper pipe flange connection plate 7, etc., the shield The control box 1 of the device and the flange connection plate 7 of the upper pipeline form a welded body by welding, and the weld seam should have no leakage. The shielded generator 3 and the flange connection plate 6 of the lower pipeline form a welded body by welding, and the weld seam should be No leakage, finally connect the assembly welding body composed of generator 3 and lower pipeline flange connection plate 6 with the assembly welding body composed of control box and upper pipeline flange connection plate 7 through the upper and lower pipeline flange connection disks, and the flange plate The interface is equipped with a conductive gasket, which can ensure the sealing and electrical continuity of the interface of the pipe flange co...
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The invention discloses a shielding device for a generator and a control cabinet. The shielding device is structurally characterized in that lower pipe flange connection plates and a shield generator form assembly welding bodies through welding; upper pipe flange connection plates and the control cabinet form other assembly welding bodies through welding; the assembly welding bodies of the shielded generator are connected with the assembly welding bodies of the control cabinet through the lower pipe flange connection plates and the upper pipe flange connection plates; a conductive gasket is arranged at each flange connection plate interface and is fastened through one fastener; and the control cabinet is provided with conductive glass window and door and plug connectors. The shielding device has the advantages that connection cables of the generator and the control cabinet all can pass through pipes of metal pipe flange connection plates; the pipes are made of a metal wave-absorbing material; due to the wall thicknesses of the pipes, ''electromagnetic energy which is not reflected by the pipe surfaces and is transmitted into the pipe walls'' can be absorbed; the electromagnetic energy with the bandwidth of 2MHz to 1GHz is absorbed and attenuated by the pipe wall wave-absorbing material when propagating in the pipe walls; and over 90dB of shielding effectiveness can be obtained.
Description
technical field [0001] The invention relates to a shielding device in which a generator and a control box are connected through N metal pipe flange connection plates, in particular to a shielding device for a generator and a control box. Background technique [0002] There are multiple interference sources in both the generator and the control box. The generator can be shielded by field filtering, and the control box also has a corresponding shielding device. Currently, the generator and the control box are connected by cables. From the perspective of suppressing electromagnetic field radiation, there are two problems in this connection: one is that there are many types of connection lines between the generator and the control box, including main power output lines, excitation control lines, and sensor signal control lines. etc. After these cables pass through the control box (or generator), they first conduct electromagnetic energy out, and then form field radiation to the ...
Claims
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Inventor 刘建平汪淑英
Owner JIANGXI TELLHOW MILITARY GRP CO LTD