WO2018099361A1 - 一种高屏蔽性大型屏蔽舱 - Google Patents

一种高屏蔽性大型屏蔽舱 Download PDF

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Publication number
WO2018099361A1
WO2018099361A1 PCT/CN2017/113329 CN2017113329W WO2018099361A1 WO 2018099361 A1 WO2018099361 A1 WO 2018099361A1 CN 2017113329 W CN2017113329 W CN 2017113329W WO 2018099361 A1 WO2018099361 A1 WO 2018099361A1
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WIPO (PCT)
Prior art keywords
shielding
cabin
door
waveguide
shielded
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PCT/CN2017/113329
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English (en)
French (fr)
Inventor
雷泽斌
周旭峰
王斌
吴伟
戴成然
周廷
王军波
Original Assignee
大连港森立达木材交易中心有限公司
辽宁出入境检验检疫局检验检疫技术中心
北京华航无线电测量研究所
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Application filed by 大连港森立达木材交易中心有限公司, 辽宁出入境检验检疫局检验检疫技术中心, 北京华航无线电测量研究所 filed Critical 大连港森立达木材交易中心有限公司
Publication of WO2018099361A1 publication Critical patent/WO2018099361A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0001—Rooms or chambers

Definitions

  • the present application relates to the field of shielding cabins, and in particular to a high shielding large shielding cabin.
  • China is a big country in timber production, and it is also a big country in wood consumption and a major exporter of wooden furniture.
  • China's timber industry resource supply has been based on natural forest resources.
  • the state imposed a ban on natural forest resources in key state-owned forest areas such as the southwestern state-owned forest area, northeast and Inner Mongolia. And the policy of cutting the limit.
  • the State Forestry Administration issued the “Notice on Effectively Stopping the Commercial Harvesting Pilot Project”.
  • the CPC Central Committee and the State Council “Several Opinions on the Comprehensive Revitalization of Old Industrial Bases in the Northeast Region”.
  • the quarantine treatment methods in the world were mainly fumigation treatment with chemical methyl bromide.
  • the domestic import of container logs is also treated with chemical methyl bromide fumigation technology for the treatment of logs and pests.
  • the treatment methods mainly have three drawbacks. First, methyl bromide is a toxic gas, which will bring serious air pollution, especially to the ozone layer. Second, residual Methyl bromide can cause harm to the health of personnel and does not meet occupational health requirements.
  • microwave radiation treatment technology is at the forefront of rapid killing of wood pest quarantine research because of its rapid, efficient and economical advantages.
  • the project not only meets the relevant requirements of national inspection and quarantine, but also achieves the nationalization requirements of environmental protection and occupational health, greatly improves the treatment efficiency, solves the contradiction between supply and demand in the timber market, and is an efficient, economical, energy-saving and environmentally friendly new one for quarantine treatment of logs. means.
  • the development and research of microwave quarantine treatment technology not only has good economic value, but also plays an important role in improving the speed of port inspection and release, improving the efficiency of “big customs clearance”, and protecting the environment.
  • the social benefits are enormous.
  • the high-power microwave uniform radiation dielectric heating technology is used to replace the original chemical methyl bromide fumigation technology to realize the treatment of container logs and pests. It is necessary to construct a large shielding cabin.
  • the function of the shielding cabin is to avoid microwave leakage, improve energy utilization efficiency and ensure the safety of the working environment.
  • the utility model discloses a high shielding large shielding cabin, which provides a basic electromagnetic shielding environment for the microwave quarantine of logs, and obtains reliable quarantine results by detecting in the space; the shielding cabin can reduce the cabin to microwave Loss of energy to avoid ignition, and shielded compartments provide fixed load conditions for waveguides and other equipment.
  • the utility model relates to a high shielding large shielding cabin, wherein the shielding cabin is a rectangular hexahedron structure, the left and right sides of the shielding cabin are the log in and out of the hatch, and the other four sides of the shielding cabin are the shielding wall; in addition, the components arranged in the cabin need to pass through the shielding cabin and The external control system is connected, and the penetrating part needs to be electromagnetically shielded; the tray conveyor belt and the support beam are arranged in the cabin, and the waveguide antenna feeder system is arranged up and down in the cabin, and the antenna feeder system leads out the microwave generator outside the cabin through a special waveguide opening. Connection, the standard flange is connected to the opening.
  • the shielding compartment is also equipped with illumination, monitoring probe, mode stirring device and temperature sensing device. Bulkhead through holes are provided, wherein the lighting, monitoring probe, mode stirring device and temperature sensing device are all required to pass through the shielding cabin, and the outside of the cabin is deep into the interior of the cabin.
  • the shielding measures adopted are: outside the wall structure Connect a section of the waveguide, the diameter of the waveguide is cut off to the working frequency, and the length of the waveguide is designed according to the shielding effect of 80dB loss. On the other hand, it avoids These components are directly exposed to the interior of the high power shielded compartment, reducing the chance of damage and failure.
  • the shielded cabin floor is equipped with a drainage microwave cut-off channel, which does not retain residual water.
  • the cabin is equipped with a ventilation and drainage system.
  • the mesh wind window is used to shield the working frequency.
  • the wind window is opened in the upper part and the side of the shielding compartment.
  • the shielding cabin adopts all-welded shielding method, and each opening of the shielding bulkhead is equipped with a cut-off waveguide for wall treatment to meet the limit value specified by the national standard.
  • the outer surface of the cabin is used for heat insulation, heat preservation, anti-corrosion, salt spray prevention and decoration treatment.
  • the net size of the casing of the shielding cabin is 15m ⁇ 4m ⁇ 3m (L ⁇ W ⁇ H); the six-sided galvanized steel plate is welded to form an electromagnetic shielding structure, and the steel plate is attached to the steel keel structure;
  • 3mm galvanized steel plate is used on the ground, and 2mm galvanized steel plate is used for the wall surface and top surface to meet the screen effect requirements of the shielding cabin in different frequency ranges.
  • the main column section is 80 ⁇ 60 ⁇ 4 (mm 3 ) and the column spacing is 2m. Cloth; transverse keel section is 60 ⁇ 40 ⁇ 3 (mm 3 ), spacing 1m; vertical keel section is 50 ⁇ 30 ⁇ 3 (mm 3 ), welded between the vertical keel, spacing 1m;
  • the top of the shielding cabin is provided with 14 main beams: the section is 120 ⁇ 60 ⁇ 4 (mm 3 ), the span is 4m, and it is erected along the width of the shielding cabin; the top surface is also provided with: the top ring beam: the section is 120 ⁇ 60 ⁇ 4 (mm 3 ), set along the circumference of the top of the shielded cabin; top keel: section 50 ⁇ 30 ⁇ 3 (mm 3 ), span 1m, forming a grid of 1m ⁇ 1m;
  • the ground is fully covered with 40 ⁇ 2 (mm 2 ), the spacing is 500mm, the ground ring beam is 150 ⁇ 100 ⁇ 4 (mm 3 ), and the ground is made of 3mm thick shielded steel plate.
  • the inner side of the shielded steel shell needs to be galvanized to improve the electrical conductivity and corrosion resistance, and the surface of the steel structure of the shielded cabin is galvanized to a thickness of 50 ⁇ m or more; the outer surface of the shielded steel shell is provided with a magnesium magnesium plate, glass magnesium The thickness of the plate is 2mm, avoiding the loss of heat and improving the energy use efficiency; after the installation of the glass magnesium plate is completed, a white aluminum-plastic plate is pasted on the glass magnesium plate as a decorative surface.
  • the grounding steel plate of the shielded cabin is considered to have a slope of 0.3% along the length of the shielded cabin, and the water waveguide is reserved at the lowest point to discharge the water and then exit the shielded cabin.
  • the corresponding pipes are connected to the underground drainage network.
  • a vertical lifting screen door is arranged on each end surface of the shielding cabin, the specification is 3.6m ⁇ 1m, and is opened and closed by the electric hinge.
  • the main body of the door is supported by the H-shaped steel structure, and the main body of the door fan runs on the guide rail in the steel structure.
  • Fully automated sliding doors are controlled by a combination of pneumatic valves and electrical components. All controls are implemented by a logic controller mounted on the main control panel and can be remotely controlled from a PC.
  • the material of the single-sided shielding door comprises: beryllium bronze, 120 ⁇ 80 ⁇ 6mm square tube, 1.2mm galvanized sheet, 1.2mm cold-rolled steel sheet, pure tin strip and screw; 120 ⁇ 80 ⁇ 6mm square tube is used to form the frame structure, and the facade is adopted.
  • 1.2mm thick galvanized sheet the frame is open to the part of the shielded compartment, and the inside contains airbag.
  • the airbag is covered with a layer of beryllium bronze.
  • the wedge wedge locking structure adopts single-knife plug-in electromagnetic sealing technology, iron-based copper-plated composite cutting edge, detachable beryllium bronze double-row reed, which can effectively form electromagnetic sealing cavity, and electromagnetic sealing is reliable; reed repair and replacement Convenient, the inner and outer door panels are double-layer insulation structure with high shielding effectiveness.
  • the screen door adopts painting process, the overall appearance is beautiful, the shape is beautiful, the operation is stable, safe and reliable;
  • Operation process opening the door, venting 20s, lifting the cylinder preparation, lifting the signal, jogging, shielding the door ascending, lifting in place, waiting, descending signal, jogging, shielding the door down, descending into position, inflating and closing the door.
  • the shielding door adopts an electric translation (X, Y direction) transmission mode
  • the locking is pneumatically locked
  • the lifting platform adopts a hydraulic cylinder driving mode
  • the mode stirring device comprises: a metal fan blade, a motor, a non-metal transmission rod, and a walled circular waveguide; the metal blade is driven by a motor, the motor is connected to the metal blade through a non-metal transmission rod, and the through-wall circular waveguide passes through the flange
  • the structure is connected to the shielded compartment.
  • the FRP tray is composed of a beam, a bottom plate and a metal frame; the beam is made of FRP, and both ends are installed at On the metal frame; the bottom plate is made of FRP; the frame is a steel frame structure for fixing the beam.
  • the antenna feeder system comprises eight antenna feeder units, each antenna feed unit includes a frequency source, a three-pin tuner, a shielding window, a ventilation waveguide, a feed straight waveguide, an E-plane curved waveguide, an H-face curved waveguide, and an arc Detector, antenna, waveguide slot plug;
  • the frequency source is placed outside the metal shielding wall; the antenna is placed in the metal shielding wall, the upper part of the antenna is a first waveguide slot antenna, and the lower part is a second waveguide slot antenna.
  • any microwave heating equipment under "normal operation” state is at any distance from any part of it equal to or greater than 0.05m. In the vicinity, the microwave leakage power density should be no more than 5mW/cm 2 ; for microwave heating equipment in the "abnormal operation” state, it should not exceed 100mW/cm 2 .
  • the beneficial effects of the present application according to the number and layout of the microwave generators of the project, the power density of the four walls in the cabin is below 170 kW/cm 2 , and the leakage power density is 1.7 mW when the shielded cabin reaches the 80 dB shielding performance of the 915 MHz ⁇ 10 MHz microwave signal. Cm 2 ; leakage power density 17 ⁇ W/cm 2 when the shielding performance reaches 100 dB.
  • the shielding performance requirements of the shielding cabin are above 100dB, so the leakage microwave signal strength can meet the requirements of the above specifications.
  • Figure 1 is a schematic view of the shielded cabin structure
  • FIG. 2 Schematic diagram of the keel layout of the shielded cabin wall
  • Figure 3 is a schematic view showing the structure of the top surface of the shielding cabin
  • Figure 4 is a schematic diagram of the ground structure
  • Figure 5 shows the effect of keel layer erection
  • FIG. 1 Schematic diagram of the screen door in the closed state
  • FIG. 6-2 Schematic diagram of the screen door in the open state
  • Figure 7 is a schematic view of the belt installation
  • FIG. 8-1 Schematic diagram of the energy field distribution in the cutoff waveguide
  • Figure 8-2 is a schematic diagram showing the relationship between the attenuation amount and the waveguide width
  • FIG. 9 Schematic diagram of the installation of the shielding box
  • Figure 10 is a schematic view of the monitoring installation shield box
  • FIG. 11-1 Figure 11-2 aluminum composite panel decoration effect diagram
  • Figure 12 is a structural view of a FRP tray
  • Figure 13 is a structural view of a mode stirring device
  • Figure 14 is a structural diagram of a microwave dielectric heating quarantine treatment system
  • Figure 15 is a schematic diagram of an antenna feeder system.
  • the net size of the casing of the shielded compartment is 15m ⁇ 4m ⁇ 3m (L ⁇ W ⁇ H). It is welded by a six-sided galvanized steel plate to form an electromagnetic shielding structure, and the steel plate is attached to the steel keel structure.
  • the shielded cabin structure is shown in Figure 1.
  • the inner side of the shielded steel shell needs to be well treated to improve the electrical conductivity and surface finish.
  • the surface of the steel structure of the cabin is galvanized: ⁇ 50 ⁇ m; The outside is used for thermal insulation to avoid heat loss and improve energy efficiency.
  • the ground construction sequence of the shielded cabin shall be the construction of the support beam of the conveyor belt in the cabin first.
  • the shielded cabin shall be assembled and welded on the basis of the shielded steel plate to ensure the overall shielding performance.
  • the ground adopts 3mm galvanized steel plate
  • the wall and top surface adopts 2mm galvanized steel plate to meet the screen effect requirements of the shielding cabin in different frequency ranges.
  • the main column section is 80 ⁇ 60 ⁇ 4 (mm 3 ), the column spacing is 2m uniform;
  • the cross keel section is 60 ⁇ 40 ⁇ 3 (mm 3 ), the spacing is 1m;
  • the vertical keel section is 50 ⁇ 30 ⁇ 3 ( Mm 3 ), welded between the vertical keels, with a spacing of 1 m.
  • the layout of the wall keel is shown in Figure 2.
  • Top surface Considering that the top equipment (fan and waveguide) is slightly larger in weight, the top surface is provided with 14 steel main beams with a span of 4 m and a spacing of 1 m.
  • a rectangular tube of 120 ⁇ 60 ⁇ 4 (mm 3 ) is used, which is erected along the width of the shielding compartment.
  • the top structure is shown in Figure 3.
  • a ⁇ B ⁇ Cmm refer to the length of the rectangular tube
  • B refers to the width of the rectangular tube
  • C refers to the interface thickness of the rectangular tube
  • the unit is mm.
  • the floor is covered with 40 ⁇ 2 (mm 2 ) shielded steel plates with a uniform spacing of 500 mm.
  • the size of the ground ring beam is 150 ⁇ 100 ⁇ 4 (mm 3 ).
  • the ground is made of 3mm thick shielded steel.
  • the schematic diagram of the ground structure is shown in Figure 4.
  • the shielding cabin shielding shell adopts the mature carbon dioxide protection welding process, and has strong adaptability to the climatic environment, and will not affect the shielding effectiveness due to moisture, electrochemical corrosion, and force deformation.
  • the keel erection is shown in Figure 5.
  • a vertical lifting screen door is arranged on both ends of the shielding compartment, and the specification is 3.6m ⁇ 1m. Pulling on and closing by an electric hinge.
  • the screen door is mainly used as a passage for the logs to enter and exit the shield cabin when the shielded tank is working.
  • the main body of the gate is supported by an H-shaped steel structure, and the main body of the door fan runs on the guide rails in the steel structure.
  • Fully automated sliding doors are controlled by a combination of pneumatic valves and electrical components. All controls are implemented by a logic controller mounted on the main control panel and can be remotely controlled from a PC.
  • the screen door closing/opening status is shown in Figure 6-1 and Figure 6-2.
  • the locking of the screen door is a double point wedge locking structure. It adopts single-knife plug-in electromagnetic sealing technology, iron-based copper-plated composite cutting edge, detachable beryllium bronze double-row reed, which can effectively form electromagnetic sealing cavity and reliable electromagnetic sealing. Reed repair and replacement is convenient.
  • the inner and outer door panels are double insulated and have high shielding effectiveness.
  • the screen door adopts the painting process, the overall appearance is beautiful, the shape is beautiful, the operation is stable, safe and reliable.
  • the screen door adopts the electric translation (X, Y direction) transmission mode, the locking is pneumatically locked, and the lifting platform adopts the hydraulic cylinder driving mode.
  • Door opening action The door opening signal is given through the computer operation interface, the locking device is gradually released, the motor is started, the door moves along the starting X direction (the direction of the vertical shielding plate body), and the gear and the frame are installed in front of the door.
  • the upward pulling motor moves, the door leaf moves in the Y direction, and the Y direction moves to the other limit position, and the door stops moving immediately.
  • a prompt signal is given after the door opening action is completed.
  • Closing action The door closing signal is given through the computer operation interface.
  • the door leaf moves slowly from the high position (Y direction) to the fixed position, and then the position is pushed to the side (X direction) until the door leaf contacts the door frame, and the reed lock is activated.
  • the system completes the door closing action.
  • a prompt signal is given after the door closing action is completed.
  • the operation control of the gate is equipped with an emergency stop system to ensure safe operation, and a power failure emergency protection device is provided to enable the door to complete a safe operation in the event of a power failure.
  • the lock system of the door is pneumatically locked, and the cylinder system is equipped with a gas storage device, which can make the door leaf and the door frame loosened by using the stored gas when the air pump of the gate is faulty.
  • the shielding door of the shielding cabin on both sides is closed and the double-output signal of the door closing in-position is closed (the short-circuit is in place, the open circuit is not in place), and the mechanical safety limit is given when the shielding door is closed.
  • the conveyor cut-off waveguide waveguide has a cross section of 100 mm x 50 mm and a depth of 500 mm.
  • the rectangular waveguide section is detachable and connected to other fixed parts by bolts. Insert the belt into the rectangular waveguide and connect the part to the fixed part with bolts.
  • the specific method is shown in Figure 7.
  • the model of the cut-off waveguide is shown in Figure 8-1 and Figure 8-2, with a non-metallic conveyor belt passing through the waveguide in the middle.
  • the lighting design is implemented in accordance with the "Civil Building Lighting Design Standards” and “Industrial Enterprise Lighting Design Standards”. LED lights are placed on the top of the shield compartment. Meet the requirement that the average illumination in the shielded cabin is greater than 100 lux. In order to protect the high-intensity microwave radiation, the LED lamp is installed in the shielding box, and the light is injected into the shielding cabin through the shielding glass.
  • the shielding box is shown in Figure 9.
  • High-definition fixed cameras are installed in the shielded cabin, which are respectively installed at the top corner of the shielded cabin to ensure that the entire shielded cabin has no dead angle.
  • the monitoring system adopts digital signals and has high anti-electromagnetic interference characteristics.
  • the camera is installed in the shielding box, and the inside of the shielding cabin is collected through the shielding glass to meet the requirements of use in a higher power electromagnetic environment. With this scheme, the shielding glass has a certain influence on the clarity of the display.
  • the camera shielding box is shown in Figure 10. In-cabin video surveillance is remotely controlled by the entire control and monitoring subsystem.
  • the anti-corrosion coating for high temperature resistance is selected.
  • the material adopts the inorganic polymer of mutual transmission network structure, and all the fillers are composed of heat-resistant and non-combustible inorganic substances.
  • the binder contains a large amount of -OH reactive groups, which reacts rapidly with the active components in the filler and the active surface of the steel to form a three-dimensional inorganic polymer, which is integrated with the steel matrix to form an electrochemical protection.
  • the heat-resistant anti-corrosion coating for physical shielding is especially suitable for long-term protection of steel structures working in high temperature and corrosive environments.
  • the material can realize self-curing at normal temperature, good anti-corrosion performance, long service life, high hardness of coating, anti-scratch, impact resistance and aging resistance.
  • the glass magnesium plate glass is installed on the outer side as the bonding surface of the aluminum-plastic plate.
  • the magnesium plate has high temperature resistance, flame retardant, sound absorption and shockproof, waterproof and moisture proof, insect proof, light antiseptic, non-toxic and tasteless.
  • the white aluminum-plastic board is attached as a decorative surface on the glass magnesium board.
  • the aluminum-plastic composite panel has the characteristics of bright and colorful decoration, corrosion resistance, fireproof, moisture-proof, sound insulation, heat insulation and light weight, and is widely used in various architectural decoration. The decoration effect of the aluminum-plastic panel is shown in Figure 11-1 and Figure 11-2.
  • the NB JYX-2 indoor thin steel structure fireproof and anticorrosive coating for high temperature resistance is selected.
  • the coating is polymerized, carbonized, expanded catalyst, fire retardant, pigment stirred and ground.
  • the inorganic polymer is used in the inter-network structure.
  • the binder in the coating contains a large amount of -OH reactive groups, which reacts rapidly with the active components in the filler and the active surface of the steel to form a three-dimensional structure of the inorganic polymer. It is integrated with the steel substrate to form a heat-resistant anti-corrosion coating with electrochemical protection and physical shielding. It is especially suitable for long-term protection of steel structures working under high temperature and corrosive environment.
  • the material is sprayed and brushed. It should be fully stirred evenly when used. When the coating is slightly thick, it can be diluted with appropriate amount of tap water to facilitate spraying. Before construction, the surface of the cable should be cleaned and polished, and the surface should be dry. It can be sprayed with fireproof materials. During the construction process, when the coating is not dry, it should be waterproof, anti-exposure, anti-pollution, anti-moving, anti-bending, if any Shall promptly repair bad; ambient temperature of the coating sprayed on the steel surface, dry at room temperature, with very good surface adhesion, scratch resistance hard wear, cracking, and excellent performance.
  • the top surface of the shielding cabin and the ground have rectangular waveguides.
  • the over-wall treatment can be carried out in the following ways:
  • the ring flange is treated by the ring flange, and the flange is welded to the shielding shell according to the specified position, and the corresponding screw hole of the inner and outer shields is shielded.
  • a wire mesh conductive lining is added between the waveguide flange and the connecting flange.
  • the structure and assembly relationship of the FRP tray are:
  • the beam 3 is FRP of FRP, a total of 23, the beam 3 is 3400mm (length) ⁇ 60mm (width) ⁇ 270mm (height), and the ends of the beam 3 are mounted on the frame through the mounting holes.
  • the thickness of the beam 3 is 60mm, the bottom plate
  • the mounting platform is on both sides of the beam 3 and has a width of 20 mm.
  • a bridge structure can be formed between each of the two beams 3, and the bottom plate 2 is laid on the mounting platform.
  • the FRP FRP sheet used for the beam 3 is composed of unsaturated polyester resin, glass fiber, curing agent and accelerator. The specific proportion is 32% unsaturated polyester resin, 65% glass fiber, 0.3% curing agent and 4.1% accelerator.
  • the agent is methyl ethyl ketone peroxide
  • the amount of curing agent can be appropriately added or subtracted according to the actual temperature
  • the accelerator is E4.
  • the composition can maintain the toughness and strength of the sheet under the condition that the wave transmittance is not less than 95%, so that the single agent can maintain the toughness and strength of the sheet.
  • the root FRP beam 3 can withstand the impact of a 1 ton log falling from a height of 200 mm.
  • a total of 23 FRP beams on the pallet can withstand 15 tons of logs. As shown in Figure 12.
  • the bottom plate 2 is made of FRP FRP, a total of 24 pieces, and the bottom plate has a size of 3400 mm (length) ⁇ 430 mm (width).
  • the bottom plate 2 is placed between the two beams through a mounting platform on the beam, and the bottom plate 2 does not serve to support the logs. Its function is mainly used for the falling of log debris or the leakage of logs to affect the normal operation of the waveguide antenna below, to avoid living organisms falling into the weak field strength region below, the bottom plate adopts a tilting design to facilitate the accumulation of oil to one side, and finally through the shielding.
  • the drain hole at the bottom of the tank is discharged.
  • Frame 1 is a steel frame structure, all profiles and steel plates are made of Q235, Q345, SPAH, side rubber pads.
  • the material of the sheet is EPDM.
  • the frame of the frame 1 is made of SPHA steel plate. It has strong resistance to atmospheric and seawater corrosion. It has high temperature oxidation resistance and can meet the requirements of the port environment.
  • Q235 is used for the beam mounting frame on frame 1.
  • the steel plate has a yield value of about 235 MPa and has strong pressure resistance characteristics, which can meet the requirements of bearing load of the log; the forklift working hole is reserved at the bottom of the frame, which facilitates the use of the forklift for the transshipment operation, and the lifting work hole is arranged on the side of the frame.
  • the front lifting equipment is used for lifting and transporting.
  • the working hole and lifting operation hole of the forklift adopt Q345 steel plate, which is low alloy steel.
  • the yield value is about 345MPa, which can withstand large pressure in a short time and can meet the requirements of short-time operation.
  • the EPDM rubber gasket used has the characteristics of oil resistance, acid and alkali resistance, cold resistance and aging resistance, and can meet the temperature change requirement in the shielding cabin due to microwave irradiation.
  • the frame 1 has an outer dimension of 12192mm (length) ⁇ 3400mm (width) ⁇ 526mm (height).
  • the frame is designed with a beam mounting frame.
  • the rubber gasket is fixed on the inner surface of the beam mounting frame by adhesive bonding.
  • the rubber gasket acts as a buffer; Simply place the beam in the mounting frame and fix it with the media screws.
  • the height of the load-bearing FRP beam on the FRP tray is above 12cm, which also meets the space requirements of the forklift attachment for the loading and unloading operations of the logs on the pallet.
  • the structure and assembly relationship of the mode agitator is:
  • the metal fan blade is injection molded for the mold. It is made of ABS plastic, and the outer layer is plated with copper and chrome. The thickness of copper plating is more than 30 ⁇ m to ensure the fan blade has good electrical conductivity.
  • the blade length should be 0.5 ⁇ 0 ( ⁇ 0 is the air wavelength). In practical applications, the best agitation effect is achieved in both horizontal and vertical directions, the blade is tilted, the angle between the blade and the horizontal is 45 degrees, and the blade length is The angle between the blades is 90°, and the blade thickness is greater than or equal to 4 mm to ensure high structural strength.
  • the main body of the metal blade mounting structure is a square through hole with a size of 12mm ⁇ 12mm, a positive tolerance is reserved, the weight is reduced around, and the mounting hole of the pin 1 is reserved on the side, and the diameter is ⁇ 6.4mm. As shown in Figure 13.
  • the non-metallic transmission rod is made of engineering plastics and is not purely plated. It is a pure dielectric rod.
  • the diameter of the transmission rod is ⁇ 20mm and the length is 660mm.
  • the bottom of the dielectric rod is reserved for the mounting of the fan blade.
  • the mounting platform is also square, with a size of 12mm ⁇ 12mm.
  • the negative tolerance is reserved for easy assembly with the transmission rod.
  • the mounting side of the mounting table is reserved for the pin 1 mounting hole, the diameter is ⁇ 6.4mm, the mounting end of the rod is processed and the mounting hole of the motor is assembled, the mounting hole is a round hole, the size is ⁇ 7.4mm, the hole depth is 20mm, and the side reserved pin 2 is installed.
  • the hole has a diameter of ⁇ 3.5 mm.
  • the aluminum rod machine is used for the circular waveguide of the wall, the diameter of the inner hole is ⁇ 30mm, the outer diameter of the circular waveguide is ⁇ 38mm, the diameter of the flange is ⁇ 90mm, and the thickness is 4mm. Eight ⁇ 4.5mm through holes are evenly distributed on the flange.
  • the diameter of the motor and transmission rod mounting table is ⁇ 7mm, and the side reserved pin 2 hole 20 has a diameter of ⁇ 3.5mm.
  • the pin 1 has a diameter of ⁇ 6 mm and a length of 50 mm, and is made of engineering plastic.
  • the pin 2 has a diameter of ⁇ 3 mm and a length of 22 mm, and is made of an aluminum rod.
  • the structure and assembly relationship of the microwave dielectric quarantine treatment system are:
  • Microwave dielectric quarantine treatment system is used for quarantine and inactivation of various imported logs.
  • Typical logs such as black walnut, rosewood and cherry wood, typical logs range in diameter from ⁇ 0.2m to ⁇ 1m and length from 3m to 6m.
  • the water content is 40% to 100%. As shown in Figure 14.
  • the system is a shielded cabin for the dielectric quarantine treatment area of the log.
  • the shielded cabin is welded by 2mm ⁇ 3mm galvanized steel plate and has a rectangular structure.
  • the net size of the shielded cabin shell is 15m ⁇ 4m ⁇ 3m (L ⁇ W ⁇ H).
  • a vertical lifting screen door is arranged on both ends of the longitudinal direction of the cabin, and the specification is 3.6m ⁇ 1.5m, which is used for the entry and exit of logs.
  • the operating frequency of the microwave generator is 915MHz
  • the output power of a single microwave generator is 75kW
  • the microwave generation efficiency is 85%
  • the microwave energy output interface is BJ9. Waveguide type.
  • BJ9 rectangular waveguides ie, antenna feeder subsystems
  • the center distance of adjacent waveguides is 650mm, and the length of each row of waveguides is 13m.
  • the center feeding is adopted, and the waveguide is provided with radiated microwave energy. Crack, slit width 30mm.
  • the 8 rows of waveguides are respectively connected to 8 sets of microwave generators.
  • the bottom waveguide is connected to the microwave source from the side opening of the shielding compartment
  • the top waveguide is connected from the top of the shielding compartment to the microwave source, and the opening on the shielding compartment passes through the welding flange. Sealed against the bulkhead to avoid energy leakage.
  • the working frequency of the antenna feeder subsystem is 915MHz, the VSWR bandwidth is not less than 20MHz, and the standing wave ratio of the antenna feeder subsystem caused by the logs in the shielded cabin can be adjusted by the three-pin adapter to achieve the standing wave ratio. Higher than 2.
  • all the waveguide gaps are sealed by the Teflon cover plate, and the fan, the ventilated waveguide and the waveguide sealing window are used to introduce positive pressure into the waveguide to avoid water vapor. Enter the waveguide.
  • the position between the two rows of 13-meter long waveguides is centered at intervals of 1 m.
  • a total of 12 infrared temperature sensor probes are installed.
  • the infrared temperature sensor probe is installed with a purge.
  • the protector is used to prevent the condensation of moisture by the continuous introduction of dry air through the blower; the remaining two waveguides are perforated at intervals of 1 m to install 2 rows * 12 total 24 mode agitators; the top of the shield compartment is located near the side plates
  • a circular cut-off waveguide is punched and used for the fiber optic line of the fiber optic temperature sensor.
  • a total of 2 video probes are respectively installed at the top of the shielding compartment near the shielding doors at both ends, and the video probe is protected by a transparent shielding glass.
  • Four sets of video probes are installed outside the shielded cabin for real-time monitoring of the microwave generator equipment, the incoming chain link and the exit chain.
  • the video probe used has 2 million pixels.
  • the inlet chain plate, the pallet conveyor belt and the exit chain plate are respectively arranged along the center line, and the length thereof is 14.8 m, wherein the pallet conveyor belt is located in the shielding cabin, and the conveyor belt is a non-metallic braided belt in the shielding cabin. It is not caused by high power microwaves during operation.
  • the distance between the inlet chain plate, the pallet conveyor belt and the exit chain plate is about 2m, which is separated by the entrance and exit doors.
  • the height of the board surface is reduced by 2 cm in turn, which is convenient for the receiving of the log pallet during the transfer process.
  • the load capacity of the inlet chain plate, the tray conveyor belt and the exit chain plate are not less than 15 tons, and the distance between the two plates is about 3.6m.
  • a metal gantry is placed on the side of the inlet chain plate near the entrance door, and four atomizing nozzles are installed centrally on the metal frame at a distance of 0.7 m, with the nozzles facing downward; water tanks are arranged on the side of the metal frame for supplying water to the nozzles, tap water After entering the water tank after passing through the water softener, the water tank capacity is 400 liters, and the water spray volume can be adjusted from 2 l to 18 l.
  • the atomizing nozzle opens when the log enters the cabin and closes when the log is fully loaded into the cabin.
  • a total of four leakage power monitoring devices are suspended and suspended at a height of 1.5 m at the upper corner of the shielded compartment for real-time monitoring of the level of microwave leakage of the shielded cabin.
  • the sound is immediately emitted.
  • the optical alarm signal is fed back to the microwave generator to immediately turn off the output of the microwave signal to ensure safety.
  • the logs are carried by special FRP trays.
  • the sizes of FRP trays are 12.8m long*3.8m wide*0.4m high.
  • the outer frame is welded by steel structure, the surface is galvanized, the thickness of zinc layer is above 50 microns, and the bottom of the forklift has holes.
  • the upper part has the same lifting hole position as the container.
  • the FRP tray is made up of 3.2m long FRP beams and FRP plates.
  • the FRP beams have a load capacity of 15 tons.
  • the FRP plates are used to prevent debris from falling into the cabin floor.
  • the area of 2.6m wide and 12m long in the middle of FRP tray is the log bearing area.
  • the logs are arranged in a single layer.
  • the volume of single-paneled logs is about 10 cubic meters. When working, the transmittance of this area to 915MHz frequency microwave is above 95%. To ensure that the logs receive the irradiation of the upper and lower two-way microwaves.
  • each device in the microwave dielectric quarantine treatment system is unified into the control system equipment by means of RJ45 network cable interface.
  • Each temperature sensor is introduced into the control system equipment in the form of 4 mA to 20 mA current analog quantity.
  • the control system equipment is built by mainstream PLC such as Siemens PLC.
  • the system controls the hardware platform and builds the HMI operating platform with the WINCC configuration software.
  • the system realizes automatic processing of the process: when the log on the pallet is ready, the log quarantine process is started, the log enters the shielding cabin with the tray driven by the inlet chain plate, the shielding door is closed, the microwave generator operates, and when the temperature is detected After the sensor reaches the set temperature of 61 ° C and keeps it for 1 min, the microwave generator is turned off, the exit door is opened, the log tray is transported out of the shielded compartment and transferred to the exit chain plate, and the exit door is closed to complete a processing flow. According to the estimation of 300 days of work per year and 90% of work efficiency, a single set of microwave quarantine treatment equipment can process logs of about 9,800 cases/year.
  • the structure and composition of the antenna feeder system are:
  • the antenna feeder system comprises eight antenna feeder units, each of which comprises a frequency source 109-116, a three-pin tuner 101, a shielding window 102, a ventilation waveguide 103, a feeding straight waveguide 106, an E-face bending waveguide 104, H.
  • the curved waveguide 105, the arc detector 401, the antennas 117-124, and the waveguide slot plug; the components are sequentially connected to form a bidirectional uniform irradiation antenna feeder system, wherein the arc detector 401 is placed on the inclined arm of each H-face curved waveguide 105.
  • 107 is a support column for supporting the conveyor belt; the antenna in the antenna feeder system and a part of the straight waveguide are placed in the metal shielding wall 108.
  • the waveguide adopts the standard BJ9 waveguide
  • the flange adopts the standard BJ9 standard.
  • the shielding compartment is 15000mm (length) ⁇ 4260mm (width) ⁇ 3000mm (height)
  • the cuboid structure has a center-to-center spacing between the first waveguide slot antennas 117-120 of 650 mm, a center-to-center spacing between the second waveguide slot antennas 121-124 of 650 mm, and the first waveguide slot antennas 117-120 and the second waveguide slot antenna.
  • the center distance between 121 and 124 is 2700 mm
  • the center distance between frequency sources 109 to 112 is 2310 mm
  • the center distance between frequency sources 113 to 116 is 2310 mm
  • the center spacing is 8000mm. As shown in Figure 15.
  • the frequency sources 109-116 are used to generate high-power electromagnetic wave signals to provide microwave energy for the whole system, and the frequency sources 109-116 are placed outside the metal shielding wall 108 for maintenance and detection, and the high-power electromagnetic wave signals generated by the frequency sources 109-116 enter.
  • the feeding network feeds eight antennas in the antenna feeder unit, wherein the frequency sources 109, 110, 113, 114 feed the lower four antennas, and the frequency sources 111, 112, 115, 116 are the upper four antennas Feeding; the main function of the feed network is to transmit the electromagnetic wave signal generated by the frequency source to the antenna, and the feed network includes all the components that the frequency source 109-116 feeds through to the antennas 117-124, mainly including three pins.
  • the antennas 117-124 are placed in the metal shielding wall and the position is fixed. In order to avoid ignition and maintenance convenience, other components are placed outside the wall, the upper part is the first waveguide slot antenna 117-120, and the lower part is the second waveguide slot.
  • the antennas 121-124 function to radiate microwave energy.

Abstract

本申请涉及一种高屏蔽性大型屏蔽舱，屏蔽舱为矩形六面体结构，屏蔽舱两侧为原木进出舱门，舱内布置有托盘传送带及支撑梁，舱内上下布置波导天馈系统，天馈系统通过专门的波导开孔引出与舱外的微波发生器连接，舱内还布置有照明、监控探头、模式搅拌器、温度传感器等设备，均设置舱壁过孔，屏蔽舱地面具备排水微波截止通道，不滞留残水，舱内设置抽风排湿系统，该屏蔽舱采用全焊接屏蔽方式，屏蔽舱壁各开口环节皆有良好的屏蔽手段，达到国标规定的限定值，舱外表面作隔热、保温、防腐、防盐雾和装修处理。屏蔽舱可降低舱体对微波能量的损耗，避免打火，另外为波导等设备提供固定承载条件。

Description

一种高屏蔽性大型屏蔽舱 技术领域
本申请涉及屏蔽舱领域，具体涉及一种高屏蔽性大型屏蔽舱。
背景技术
中国是木材生产大国，更是木材消费大国、木制家具的出口大国。长期以来中国木材产业资源供给一直建立在天然林资源基础之上,1998年中国政府实施天然林保护工程后，国家对西南国有林区、东北及内蒙古等重点国有林区天然林资源实施了禁伐、限伐政策。2014年1月，国家林业局下发了《关于切实做好全面停止商业性采伐试点工作的通知》，2016年4月中共中央、国务院《关于全面振兴东北地区等老工业基地的若干意见》，明确要求大小兴安岭和长白山等重点林区全面停止商业采伐。由此导致国内木材供需缺口巨大。为满足木材消费需求，我国从南美、北美、东南亚、俄罗斯、非洲等地大量进口木材，尤其以各种原木为主。根据中国海关统计年鉴，原木已成为中国最主要的进口大宗商品之一。
大量增加原木的进口隐藏着随原木进口带来的外来有害生物的传播与控制问题，即检疫处理问题。以往世界通行的检疫处理方法主要是采用化学药剂溴甲烷进行熏蒸处理。国内目前针对进口集装箱原木也是采取化学溴甲烷熏蒸技术进行原木病虫害处理，其处理方法主要存在三点弊端，一是溴甲烷为有毒气体，会带来严重的大气污染尤其对臭氧层的破坏；二是残留的溴甲烷对人员的健康会造成伤害，不符合职业健康要求；三是溴甲烷熏蒸处理一部集装箱原木需要24小时，增加了周转环节，降低生产效率。根据1997年《蒙特利尔议定书哥本哈根修正案》，由于溴甲烷对大气臭氧层的影响，发达国家已达成在2005年完全停止使用溴甲烷的协议，发展中国家也应在2015年前完全停止溴甲烷作为熏蒸处理剂使用。
从保护环境的角度出发，检疫除害处理手段必将朝着以物理处理为主流的方向发展，国际植物保护组织鼓励缔约方在木材检疫处理中开展用微波介电加热方式替代溴甲烷熏蒸方式。微波辐射处理技术因其快速、高效和经济的优点，处于快速杀灭木材害虫检疫研究前沿。该项目既满足国家检验检疫相关规定，实现环保与职业健康的国家化要求，又大大提高处理效率，解决木材市场的供需矛盾，是进行原木检疫处理的一种高效、经济、节能、环保的新手段。开发和研究微波检疫处理技术，不仅具有较好的经济价值，对提高口岸验放速度、增进“大通关”效能，对保护环境等，均具有十分重要的意义，社会效益十分巨大。
采用高功率微波均匀辐射介电加热技术替代原有化学溴甲烷熏蒸技术来实现集装箱原木病虫害处理，须要建设大型屏蔽舱，屏蔽舱的功能是避免微波泄露，提高能量利用效率，确保工作环境的安全。
发明内容
本申请公开了一种高屏蔽性大型屏蔽舱，该屏蔽舱为原木微波检疫提供一个基础的电磁屏蔽环境，通过在此空间内进行检测，获得可靠的检疫结果；屏蔽舱可降低舱体对微波能量的损耗，避免打火，另外屏蔽舱为波导及其他设备提供固定承载条件。
本申请的具体技术方案如下：
一种高屏蔽性大型屏蔽舱，屏蔽舱为矩形六面体结构，屏蔽舱的左右两侧为原木进出舱门，屏蔽舱的其他四侧是屏蔽墙；另外舱内布置的部件需要穿过屏蔽舱与外部控制系统相连接，穿舱部分需要作电磁屏蔽；舱内布置有托盘传送带及支撑梁，舱内上下布置波导天馈系统，天馈系统通过专门的波导开孔引出与舱外的微波发生器连接，开口处接有标准法兰，安装时将天馈系统的法兰在此处拧在一起，起到屏蔽作用；屏蔽舱内还布置有照明、监控探头、模式搅拌装置、温度传感设备，均设置舱壁过孔，其中照明、监控探头、模式搅拌装置、温度传感设备，均需穿过屏蔽舱，由舱体外部深入舱体内部，采用的屏蔽措施是：在穿墙结构外部连接一段波导管，波导管的口径对工作频率是截至的，波导管的长度按照损耗80dB的屏蔽效果设计，另一方面，避免了将这些部件直接暴露在高功率屏蔽舱内部，减少了其损坏和失效的几率。屏蔽舱地面具备排水微波截止通道，不滞留残水，舱内设置抽风排湿系统，采用网状风窗，对工作频率处于屏蔽状态，风窗开在屏蔽舱上部和侧部各四个。该屏蔽舱采用全焊接屏蔽方式，屏蔽舱壁各开口均加装截止波导进行过壁处理，达到国标规定的限定值，舱外表面作隔热、保温、防腐、防盐雾和装修处理。
进一步的，屏蔽舱的壳体净尺寸为15m×4m×3m(L×W×H)；采用六面镀锌钢板焊接而成，形成电磁屏蔽结构，钢板依附在钢龙骨结构上；
地面采用3mm镀锌钢板，墙面和顶面采用2mm镀锌钢板，满足屏蔽舱在不同频段范围的屏效要求，其中，主立柱截面为80×60×4(mm3)，柱距2m均布；横龙骨截面为60×40×3(mm3)，间距1m布置；竖龙骨截面为50×30×3(mm3)，焊于竖龙骨之间，间距1m；
屏蔽舱顶面设置14道顶主梁：截面为120×60×4(mm3)，跨度为4m，沿屏蔽舱宽度方向架设；顶面还设有：顶圈梁：截面为120×60×4(mm3)，沿屏蔽舱顶部周圈设置；顶龙骨：截面为50×30×3(mm3)，跨度为1m，形成1m×1m网格；
地面满铺40×2(mm2)，间距500mm均布，地圈梁规格为150×100×4(mm3)，地面采用3mm厚屏蔽钢板。
进一步的，屏蔽舱钢壳体内侧需作镀锌处理，提高导电性能和防腐蚀性能，屏蔽舱舱内腔钢结构表面镀锌厚度大于等于50μm；屏蔽钢壳体外侧安装玻镁板,玻镁板厚度2mm，避免热量的流失，提高能量使用效率；在玻镁板安装完成后，在玻镁板上粘贴白色铝塑板作为装饰面。
进一步的，考虑屏蔽舱内的排水，屏蔽舱地面钢板焊接时沿屏蔽舱长度方向考虑0.3％的坡度，并在最低处预留水波导将水做过壁处理后排出屏蔽舱外，土建预留相应管道汇入地下排水管网。
进一步的，屏蔽舱两端面各设置一樘垂直升降屏蔽门，规格为3.6m×1m，通过电动铰链拉动开启和闭合，大门主体采用H型钢构支撑，门扇主体在钢构内的导轨上运行，完全自动化的推拉门是通过气动阀门和电器元件的组合控制的，所有的控制是通过安装在主控制面板上逻辑控制器来实现的，可通过电脑远程控制。
单面屏蔽门材料组成包括：铍青铜、120×80×6mm方管、1.2mm镀锌板、1.2mm冷轧钢板、纯锡条、螺丝；120×80×6mm方管组成框架结构，门面采用1.2mm厚镀锌板，边框朝向屏蔽舱部分开口，内部含有气囊，气囊外包裹一层铍青铜，当屏蔽门下降到位时，充气闭门，起到屏蔽效果；屏蔽门的锁紧为双点斜楔锁紧结构，采用单刀插入式电磁密封技术，以铁为基体的镀铜复合刀口，可拆卸式铍青铜双排簧片，能有效地形成电磁密封腔，电磁密封可靠；簧片维修更换方便，内外门板为双层绝缘结构，具有较高的屏蔽效能，屏蔽门采用喷漆工艺，整体美观，外形漂亮，运行平稳，安全可靠；
屏蔽门参数、性能：800MHz～1.5GHz，屏蔽效能：大于等于100dB，提升气缸使用压力0.5MPa，气囊充气压力0.1MPa，
运行流程：开门、放气20s、提升气缸准备、提升信号、点动、屏蔽门上升、提升到位、等待、下降信号、点动、屏蔽门下降、下降到位、充气闭门。
进一步的，屏蔽门采用电动平移(X、Y方向)的传动方式，锁紧采用气动锁紧，升降台采用液压油缸驱动模式。
进一步的，模式搅拌装置包括：金属扇叶、电机、非金属传动杆、过壁圆波导；金属扇叶由电机驱动，电机通过非金属传动杆与金属扇叶连接，过壁圆波导通过法兰结构与屏蔽舱相连接。
进一步的，玻璃钢托盘由横梁、底板和金属框架组成；横梁为玻璃钢材质，两端安装在 金属框架上；底板为玻璃钢材质；框架为钢框架结构，用于固定所述横梁。
进一步的，天馈系统包含八个天馈单元，每个天馈单元均包括频率源、三销钉调谐器、屏蔽窗、通风波导、馈电直波导、E面弯波导、H面弯波导、弧光探测仪、天线、波导缝隙塞；
频率源置于金属屏蔽墙外面；天线置于金属屏蔽墙内，天线上部为第一波导缝隙天线，下部为第二波导缝隙天线。
根据GB5959.6-2008《工业微波加热设备的安全规范》6.1微波泄露极限的规定，处于“正常运行”状态下的微波加热设备，在距其任何部位的距离等于或大于0.05m处的任何易接近处，其微波泄露功率密度应不大于5mW/cm2；对处于“非正常运行”状态下的微波加热设备，则应不超过100mW/cm2。根据GB8702-2014《电磁环境控制限值》规定在30MHz～3000MHz频率范围内公众暴露控制限值：40μW/cm2。屏蔽舱屏蔽性能：≥100dB@0.8GHz～1GHz。
本申请的有益效果：根据本项目的微波发生器数量和布局，舱内四壁功率密度在170kw/cm2以下，在屏蔽舱对915MHz±10MHz微波信号达到80dB屏蔽性能时泄露功率密度1.7mW/cm2；屏蔽性能达到100dB时泄漏功率密度17μW/cm2。屏蔽舱屏蔽性能技术要求在100dB以上，因此泄露微波信号强度能满足以上规范的要求。
附图说明
图1屏蔽舱结构示意图；
图2屏蔽舱墙面龙骨布局示意图；
图3屏蔽舱顶面结构示意图；
图4地面结构示意图；
图5龙骨层搭设效果图；
图6-1关闭状态下屏蔽门示意图；
图6-2开启状态下屏蔽门示意图；
图7皮带安装示意图；
图8-1截止波导内能量场分布示意图；
图8-2衰减量与波导宽度的关系示意图；
图9灯具安装屏蔽箱示意图；
图10监控安装屏蔽箱示意图；
图11-1、图11-2铝塑板装修效果图；
图12为玻璃钢托盘结构图；
图13为模式搅拌装置结构图；
图14为微波介电加热检疫处理系统结构图；
图15为天馈系统示意图。
图中，1金属框架；2底板；3横梁；21-金属扇叶，22-非金属传动杆，23-过壁波导，24-电机，25-扇叶与非金属传动杆之间固定销(以下简称销1)，26-非金属传动杆与电机之间固定销(以下简称销2)；31屏蔽舱；32喷淋设备；33漏功率监测设备；34控制系统设备；35微波发生器；36模式搅拌器；37天馈子系统；38视频监控设备；39温度传感器；40出舱链板；41托盘传送带；42玻璃钢托盘；43进舱链板；44原木。
具体实施方式
下面结合附图来具体描述本申请的优选实施例，其中，附图构成本申请一部分，并与本申请的实施例一起用于阐释本申请的原理。
屏蔽舱的壳体净尺寸为15m×4m×3m(L×W×H)。采用六面镀锌钢板焊接而成，形成电磁屏蔽结构，钢板依附在钢龙骨结构上。屏蔽舱结构如图1所示。
为减小屏蔽舱结构自身对微波能量的损耗，屏蔽钢壳体内侧需作良好的表面处理，提高导电性能和表面光洁度，舱内腔钢结构表面镀锌厚度：≥50μm；另外屏蔽钢壳体外侧作保温防护，避免热量的流失，提高能量使用效率。屏蔽舱的地面施工顺序应为舱内传送带支撑梁地桩首先完成施工，屏蔽舱在此基础上进行屏蔽钢板的拼装和焊接，确保整体的屏蔽性能。
为保证焊接质量，地面采用3mm镀锌钢板，墙面和顶面采用2mm镀锌钢板，满足屏蔽舱在不同频段范围的屏效要求。其中，主立柱截面为80×60×4(mm3)，柱距2m均布；横龙骨截面为60×40×3(mm3)，间距1m布置；竖龙骨截面为50×30×3(mm3)，焊于竖龙骨之间，间距1m。墙面龙骨布局示意如图2所示
顶面：考虑顶部设备(风扇及波导)重量略大，顶面设置14道钢主梁，跨度4m，间距1m，采用120×60×4(mm3)矩形管，沿屏蔽舱宽度方向架设。顶圈梁：截面为120×60×4(mm3)，沿屏蔽舱顶部周圈设置；顶龙骨：截面为50×30×3(mm3)，跨度为1m，形成1m×1m网格。顶面结构示意图如3图所示。
以上所有方管尺寸A×B×Cmm中A是指矩形管的长，B是指矩形管的宽，C是指矩形管的界面厚度，单位是mm。地面满铺40×2(mm2)屏蔽钢板，间距500mm均布，地圈梁规格为150×100×4(mm3)。为了减少焊接变形，地面采用3mm厚屏蔽钢板。地面结构示意图如图4所示。
考虑屏蔽舱内的排水，屏蔽舱地面钢板焊接时沿屏蔽舱长度方向考虑0.3％的坡度，并在最低处预留水波导将水做过壁处理后排出屏蔽舱外，土建预留相应管道汇入地下排水管网。
屏蔽舱屏蔽壳体采用成熟的二氧化碳保护焊接工艺，气候环境适应能力较强，不会因潮湿、电化学腐蚀、受力变形等影响屏蔽效能。龙骨搭设示意如图5所示。
屏蔽门
屏蔽舱两端面各设置一樘垂直升降屏蔽门，规格为3.6m×1m。通过电动铰链拉动开启和闭合。屏蔽门主要用作屏蔽舱工作时原木进出屏蔽舱的通道，大门主体采用H型钢构支撑，门扇主体在钢构内的导轨上运行。完全自动化的推拉门是通过气动阀门和电器元件的组合控制的，所有的控制是通过安装在主控制面板上逻辑控制器来实现的，可通过电脑远程控制。屏蔽门关闭/开启状态如图6-1、图6-2所示。
屏蔽门的锁紧为双点斜楔锁紧结构。采用单刀插入式电磁密封技术，以铁为基体的镀铜复合刀口，可拆卸式铍青铜双排簧片，能有效地形成电磁密封腔，电磁密封可靠。簧片维修更换方便。内外门板为双层绝缘结构，具有较高的屏蔽效能。屏蔽门采用喷漆工艺，整体美观，外形漂亮，运行平稳，安全可靠。
屏蔽门采用电动平移(X、Y方向)的传动方式，锁紧采用气动锁紧，升降台采用液压油缸驱动模式。
开门动作：通过电脑操作界面给出开门信号，锁紧装置逐渐松开，启动电机，门就会沿开始X方向移动(垂直屏蔽板体方向)，齿轮和机架安装在门前。当门达到固定限位后,向上的提拉电机动作，门扇作Y方向运动，Y方向上运动达到另一个限位位置，门立即停止运动。开门动作完成后给出提示信号。
关门动作：通过电脑操作界面给出关门信号，门扇由高位向下缓慢运动(Y方向)至固定位置，再由此位置向侧推进(X方向)，直至门扇与门框接触，启动簧片锁进系统完成大门关门动作。关门动作完成后给出提示信号。
大门的运行控制配有急停系统确保运行安全，备有断电应急保护装置，能使大门在断电的情况下完成一次安全操作。
大门的锁紧系统为气动锁紧，气缸系统配有储气设备，可使大门的气泵故障时运用储存的气使门扇与门框松开。
两侧屏蔽舱屏蔽门关闭到位、开门到位闭锁双路输出信号(短路接通为到位，断路为未到位)，屏蔽门关闭到位时给出机械安全限位。
由于传送带电机在舱外，传送带运动过程中必然要穿过屏蔽舱，带来屏蔽性能的减低。采用截止波导的过壁方式增强屏蔽性能。传送带截止波导波导管截面为100mm×50mm，深度为500mm。考虑皮带更换及维修，矩形波导部分为可拆卸形式，通过螺栓与其他固定部分连接。将皮带嵌入矩形波导内，将此部分用螺栓与固定部分连接，具体做法如图7所示。截止波导的模型如图8-1、图8-2所示，中间为非金属传送带穿过波导。
舱内照明系统
照明设计按照《民用建筑照明设计标准》及《工业企业照明设计标准》执行。屏蔽舱顶部设置LED灯。满足屏蔽舱内平均照度大于100lux的要求。为防护高强度微波辐射，LED灯安装在屏蔽箱内，通过屏蔽玻璃将光线射入屏蔽舱。屏蔽箱示意如图9所示。
舱内视频监控
屏蔽舱内设置高清固定摄像头，分别安装于屏蔽舱顶面角部，保证整个屏蔽舱范围无死角。该监控系统采用数字信号，具有较高的抗电磁干扰特性，将摄像头安装于屏蔽箱内，通过屏蔽玻璃采集屏蔽舱内视野，满足较高功率电磁环境下的使用要求。采用此种方案，屏蔽玻璃对显示画面清晰度有一定的影响。摄像头屏蔽箱示意如图10所示。舱内视频监控受整个控制监控子系统远程控制。
防腐处理
由于屏蔽舱内的高温环境，选用耐高温专用的防腐涂料，该种材料采用互传网络结构无机聚合物，所有填料均由耐热、不燃的无机物组成。基料中含有大量-OH活性基团，它与填料中的活性组分及钢铁活性表面快速反应，生成三维结构的无机聚合物，将涂层与钢铁基体连成一体，形成具有电化学保护和物理屏蔽作用的耐热防腐涂层，特别适用于工作在高温，腐蚀环境下的钢铁结构的长效防护。
该种材料可实现常温下自固化，防腐性能好，使用寿命长，涂层硬度高，抗擦伤，抗冲击，耐老化等优点。
装饰装修
屏蔽舱龙骨焊接完成后在，在外侧安装玻镁板玻作为铝塑板的粘贴面，镁板具有耐高温、阻燃、吸声防震、防水防潮、防虫蛀、轻质防腐、无毒无味无污染等特性，在玻镁板安装完成后，在玻镁板上粘贴白色铝塑板作为装饰面。铝塑板具有艳丽多彩的装饰性、耐蚀、防火、防潮、隔音、隔热、质轻等特点，被广泛应用于各种建筑装饰上。铝塑板装修效果如图11-1、图11-2所示。
由于屏蔽舱内的高温环境，选用耐高温专用的NB(JYX-2)室内薄型钢结构防火防腐涂料，涂料由高分子乳液、成碳剂、膨胀催化剂、防火剂、颜料经搅拌、磨细产物，采用互传网络结构无机聚合物，涂料中的基料内含有大量-OH活性基团，它与填料中的活性组分及钢铁活性表面快速反应，生成三维结构的无机聚合物，将涂层与钢铁基体连成一体，形成具有电化学保护和物理屏蔽作用的耐热防腐涂层，特别适用于工作在高温，腐蚀环境下的钢铁结构的长效防护；该材料施工采用喷涂、刷涂方法，使用时应充分搅拌均匀，涂料稍稠时，可用适量自来水进行稀释，以方便喷涂为宜，施工前，应将电缆表面的浮沉、油污、杂物等清洗、打磨干净，待表面干燥时方可进行防火材料的喷涂，施工过程中，涂层未干时，应防水、防暴晒、防污染、防移动、防弯曲，如有损坏应及时修补；该涂料常温喷涂在钢结构表面，常温自干，与表面附着力非常好，坚硬耐磨耐划伤，不开裂，性能优良。
矩形波导过壁处理
为实现电磁波的舱内照射，屏蔽舱顶面和地面均有矩形波导贯穿，过壁处理可以采用以下方式：
为增强屏蔽性能，采用环装法兰盘过壁处理，将法兰盘按照指定位置与屏蔽壳体焊接，屏蔽体内外波导对应螺丝孔位旋紧。波导法兰与连接法兰之间加装丝网导电衬。
玻璃钢托盘的结构和组装关系为：
横梁3为玻璃钢材质FRP，共23根，横梁3尺寸为3400mm(长)×60mm(宽)×270mm(高)，横梁3两端通过安装孔安装在框架上，横梁3主体厚度为60mm，底板安装平台在横梁3两侧，宽度为20mm。每两根横梁3之间可形成一个桥梁结构，底板2平铺在安装平台上。横梁3所用FRP玻璃钢板材由不饱和聚酯树脂、玻璃纤维、固化剂、促进剂组成，具体比例为不饱和聚酯树脂32％，玻璃纤维65％，固化剂0.3％和促进剂4.1％，固化剂为过氧化甲乙酮，固化剂加入量可根据实际温度适当加减，促进剂为E4，采用此组分能在保证透波率不低于95％的情况下保持板材的韧性和强度，使得单根玻璃钢横梁3能承受一根1吨原木从200mm高处落下的冲击，托盘上总计23根玻璃钢横梁整体可承受15吨原木。如图12所示。
底板2为玻璃钢材质FRP，共24块，底板尺寸为3400mm(长)×430mm(宽)，底板2通过横梁上的安装平台放置在两个横梁之间，底板2并不起支撑原木的作用，其作用主要用于原木碎屑掉落或原木渗液影响下面波导天线的正常工作，避免有活体生物掉落在下面弱场强区域，底板采取倾斜设计便于油污向一侧汇聚流出，最后经由屏蔽舱底部的排水孔排出。
框架1为钢框架结构，采用的所有型材及钢板材质为Q235、Q345、SPAH，侧面橡胶垫 片材质均为EPDM，框架1外形四边框采用SPHA钢板，具有极强的耐大气和海水腐蚀能力，特别具有抗高温氧化能力，可以满足港口环境的要求；框架1上的横梁安装框处采用Q235型钢板，其屈服值在235MPa左右，具有较强的耐压特性，可满足承受原木载重的要求；框架底边预留叉车作业孔，方便使用叉车进行转运操作，框架侧面设置吊装作业孔，方便正面吊设备进行起吊转运，叉车作业孔和吊装作业孔采用Q345型钢板，为低合金钢，其屈服值在345MPa左右，能在短时间内承受较大的压力，可以满足短时间作业要求；同时，所用EPDM橡胶垫片具有耐油、耐酸碱、耐寒热和耐老化等特性，可以满足屏蔽舱内由于微波照射产生的温度变化要求。框架1外形尺寸为12192mm(长)×3400mm(宽)×526mm(高)，框架上设计横梁安装框，橡胶垫片通过胶粘接固定在横梁安装框内表面，橡胶垫片起缓冲作用；使用时，只需将横梁放置在安装框内，通过介质螺钉固定.玻璃钢托盘上承重玻璃钢横梁的高度在12cm以上，也满足叉车属具对原木在托盘上的装载和卸载操作的空间需要。
模式搅拌器的结构和组装关系为：
金属扇叶为模具注塑成型，采用ABS塑料，外层电镀铜和铬，镀铜厚度大于30μm，以保证扇叶具有良好的导电特性，为达到最佳搅拌效果，叶片长度应为0.5×λ0(λ0为空气波长)，实际应用中，为在水平和竖直两个方向均达到最好的搅拌效果，将扇叶进行倾斜，扇叶与水平方向夹角为45度，叶片长度为
Figure PCTCN2017113329-appb-000001
叶片之间夹角为90°，叶片厚度大于等于4mm，以保证其具有较高的结构强度。金属扇叶安装结构主体为方形通孔，尺寸为12mm×12mm，预留正公差，四周进行减重处理，侧面预留销1安装孔，直径为Φ6.4mm。如图13所示。
非金属传动杆采用工程塑料机加工而成，不进行任何电镀处理，为纯介质杆。传动杆直径为Φ20mm，长度为660mm，介质杆底端预留与扇叶装配的安装台，安装台同样为方形，尺寸为12mm×12mm，预留负公差，方便与传动杆的装配。安装台侧面预留销1安装孔，直径为Φ6.4mm，质杆顶端加工与电机装配的安装孔，安装孔为圆孔，尺寸为Φ7.4mm，孔深为20mm，侧面预留销2安装孔，直径为Φ3.5mm。
过壁圆波导采用的铝棒机加而成，内孔直径为Φ30mm，圆波导外径为Φ38mm，法兰盘直径为Φ90mm，厚度为4mm。法兰盘上均匀分布8个Φ4.5mm的通孔。电机与传动杆安装台直径为Φ7mm，侧面预留销2孔20直径为Φ3.5mm。
销1直径为Φ6mm，长度为50mm，其材质为工程塑料。销2直径为Φ3mm，长度为22mm，其材质为铝棒。
微波介电检疫处理系统的结构和组装关系为：
微波介电检疫处理系统用于对各种进口原木的检疫灭活处理，典型原木如：黑胡桃、花梨木、樱桃木等，典型原木直径范围在Φ0.2m～Φ1m，长度在3m～6m，含水率40％～100％。如图14所示。
系统对原木介电检疫处理区域为屏蔽舱，屏蔽舱由2mm～3mm镀锌钢板焊接而成，为矩形结构，屏蔽舱壳体内净尺寸为15m×4m×3m(L×W×H)，屏蔽舱沿长度方向的两端面各设置一樘垂直升降屏蔽门，规格为3.6m×1.5m，分别用于原木的进舱和出舱。
在屏蔽舱的两侧面分别布置4套共8套大功率的微波发生器，微波发生器工作频率为915MHz，单套微波发生器输出功率75kW，微波产生效率达85％，微波能量输出接口采用BJ9波导型式。
屏蔽舱内顶部和底部居中分别布置四行BJ9矩形波导即天馈子系统，相邻波导的中心距离650mm，每行波导长度为13m，采取中心馈电的方式，波导上开有辐射微波能量的裂缝，缝宽度30mm。该8行波导分别连接8套微波发生器。为便于安装、维护，其中底部的波导从屏蔽舱侧面开孔引出与微波源连接，顶部的波导从屏蔽舱顶部开孔的方式引出与微波源连接，屏蔽舱上的开孔通过焊接法兰盘与屏蔽舱壁的方式密封，避免能量泄露。天馈子系统工作频率为915MHz，驻波比带宽不小于20MHz，屏蔽舱内承载原木带来天馈子系统驻波比恶化情况下，可通过其三销钉调配器进行调节，达到驻波比不高于2。为避免原木处理过程中热蒸汽经过波导裂缝串入波导内部，所有波导缝隙采用聚四氟乙烯盖板进行封堵，另外利用风机、通风波导和波导密封窗向波导内引入正压，避免水蒸汽进入波导。
在屏蔽舱顶部中间两行13米长波导之间的位置居中以1m为间隔打孔安装红外温度传感器探头共12个，为避免红外温度传感器探头上水汽凝结，红外温度传感器探头上安装有吹扫防护器，通过鼓风机不停引入干燥空气来防止水汽凝结；其余两波导之间位置以1m为间隔打孔安装2行*12个共24个模式搅拌器；屏蔽舱顶部中间靠近两侧板的位置打孔安装圆形截止波导，用于光纤温度传感器的光纤线过壁。
在屏蔽舱内顶部靠近两端屏蔽门的位置分别安装各一个共2个视频探头，视频探头由透光的屏蔽玻璃提供防护。在屏蔽舱外安装4套视频探头用于对微波发生器设备、进舱链板、出舱链板的实时监控。所用视频探头像素达到200万。
沿屏蔽舱长度方向，沿中心线分别布置进舱链板、托盘传送带、出舱链板，其长度为14.8m，其中托盘传送带位于屏蔽舱内，其传送带为非金属编织带，在屏蔽舱内运行过程中不至于由高功率微波引起打火。进舱链板、托盘传送带、出舱链板之间间距约2m，由进舱、出舱门隔断， 板面的高度依次降低2cm，便于原木托盘转移过程中的承接。进舱链板、托盘传送带、出舱链板承载能力均不小于15吨，两幅板间约距3.6m。
在进舱链板靠近进舱门一侧架设金属龙门架，在金属架上以0.7m的间距居中安装4个雾化喷头，喷头朝下；在金属架边布置水箱用于给喷头供水，自来水经过软水机后进入水箱，水箱容量400升，喷水量2l～18l可调节。雾化喷头随原木进舱时开启，随原木完全进舱后关闭。
在屏蔽舱上层四角1.5m高度分别悬吊布置一个共四个漏功率监测设备，用于实时监测屏蔽舱8微波泄露的电平情况，当监测到泄露微波信号超出国标规定的范围，立即发出声光告警信号，并反馈到微波发生器立即关断微波信号的输出，保障安全。
原木由专用玻璃钢托盘承载，玻璃钢托盘尺寸为12.8m长*3.8m宽*0.4m高，其外框架为钢结构焊接而成，表面镀锌，锌层厚度在50微米以上，底部有叉车孔位，上部有与集装箱相同的吊装孔位。玻璃钢托盘盘面由3.2m长的玻璃钢横梁和玻璃钢平板构成，玻璃钢横梁其原木承载能力15吨，玻璃钢平板用于避免杂物掉落到舱内地面。玻璃钢托盘中间2.6m宽*12m长的区域为原木承载区，原木采用单层排列方式，单托盘平铺原木体积约10立方米，工作时该区域对915MHz频率微波的透波率在95％以上，确保原木收到上下双向微波的辐照处理。
微波介电检疫处理系统中各设备的控制统一以RJ45网线接口方式引入控制系统设备，各温度传感器以4mA～20mA电流模拟量的形式引入控制系统设备，控制系统设备通过主流PLC如Siemens PLC等搭建系统控制硬件平台，以WINCC组态软件搭建HMI操作平台。该系统实现流程化自动处理：当托盘上原木准备就绪时启动原木检疫处理流程，原木随托盘在进舱链板的驱动下进入屏蔽舱，屏蔽门关闭，微波发生器运行，当检测到各温度传感器达到设定的61℃并保持1min后，关闭微波发生器，出舱门开启，将原木托盘传送出屏蔽舱转移到出舱链板上，出舱门关闭，完成一次处理流程。按照一年工作300天、作业效率90％估算，单套微波检疫处理设备可处理原木约9800箱/年。
天馈系统的结构和组成关系为：
天馈系统包含八个天馈单元，每个天馈单元均包括频率源109～116、三销钉调谐器101、屏蔽窗102、通风波导103、馈电直波导106、E面弯波导104、H面弯波导105、弧光探测仪401、天线117～124、波导缝隙塞；各部件依次相连，组成双向均匀辐照天馈系统，其中弧光探测仪401置于每个H面弯波导105的斜臂上，107是支撑柱，用于支撑传送带；天馈系统中的天线和部分直波导放置于金属屏蔽墙108内，本申请中波导采用的是标准BJ9的波导，法兰盘采用的标准BJ9标准法兰。屏蔽舱为15000mm(长)×4260mm(宽)×3000mm(高) 的长方体结构，第一波导缝隙天线117～120之间的中心间距为650mm，第二波导缝隙天线121～124之间的中心间距为650mm，第一波导缝隙天线117～120与第二波导缝隙天线121～124之间的中心距离为2700mm，频率源109～112之间的中心间距为2310mm，频率源113～116之间的中心间距为2310mm，频率源109～112与频率源113～116之间的中心间距为8000mm。如图15所示。
频率源109～116用于产生高功率电磁波信号，为整个系统提供微波能量，频率源109～116置于金属屏蔽墙108外面，便于维修和检测，频率源109～116产生的高功率电磁波信号进入馈电网络，为天馈单元中的八根天线馈电，其中频率源109、110、113、114为下方的四根天线馈电，频率源111、112、115、116为上方的四根天线馈电；馈电网络的主要功能是将频率源产生的电磁波信号传输到天线，馈电网络包含频率源109～116向天线117～124馈电过程中信号所经过的全部部件，主要包括三销钉调谐器101、屏蔽窗102、通风波导103、馈电直波导106、E面弯波导104、H面弯波导105、弧光探测仪401；由于天线和频率源的位置已经固定，每个馈电波导的总长度不一样，因此，馈电网络的长度主要是靠直波导调节。天线117～124置于金属屏蔽墙内，位置已经固定，为避免打火以及维修便利性，其他部件均放在墙体外部，上部为第一波导缝隙天线117～120，下部为第二波导缝隙天线121～124，其作用是辐射微波能量。
以上所述，仅为本申请较佳的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。

Claims (9)

  1. 一种高屏蔽性大型屏蔽舱，其特征在于，所述屏蔽舱为矩形六面体结构，所述屏蔽舱左右两侧为原木进出舱门，其他四侧为屏蔽墙；所述屏蔽舱内布置的部件需要穿过屏蔽舱与外部控制系统相连接，穿舱部分需要作电磁屏蔽；
    所述屏蔽舱内布置有玻璃钢托盘传送带及支撑梁，所述屏蔽舱内上下布置波导天馈系统，所述天馈系统通过专门的波导开孔引出与舱外的微波发生器连接，所述开孔处接有标准法兰，安装时将天馈系统的法兰在所述开孔处与所述标准法兰拧在一起；
    所述屏蔽舱内还布置有照明、监控探头、模式搅拌装置、温度传感设备，均设置舱壁过孔，所述照明、监控探头、模式搅拌装置、温度传感设备均需穿过屏蔽舱，由所述屏蔽舱舱体外部深入舱体内部；所述屏蔽舱地面具备排水微波截止通道，不滞留残水，所述屏蔽舱内设置抽风排湿系统，采用网状风窗，对工作频率处于屏蔽状态；
    所述屏蔽舱采用全焊接屏蔽方式，屏蔽舱壁各开口均加装截止波导进行过壁处理所述屏蔽舱外表面作隔热、保温、防腐、防盐雾和装修处理。
  2. 如权利要求1所述的高屏蔽性大型屏蔽舱，其特征在于，所述屏蔽舱的壳体净尺寸为15m×4m×3m(L×W×H)；所述屏蔽舱采用六面镀锌钢板焊接而成，形成电磁屏蔽结构，所述钢板依附在钢龙骨结构上；
    所述屏蔽舱的地面采用3mm镀锌钢板，所述屏蔽舱的墙面和顶面采用2mm镀锌钢板，所述屏蔽舱的主立柱截面为80×60×4(mm3)，柱距2m均布；所述屏蔽舱的横龙骨截面为60×40×3(mm3)，间距1m布置；所述屏蔽舱的竖龙骨截面为50×30×3(mm3)，焊于竖龙骨之间，间距1m；
    所述屏蔽舱的顶面设置14道顶主梁：截面为120×60×4(mm3)，跨度为4m，沿所述屏蔽舱宽度方向架设；所述屏蔽舱的顶面还设有：顶圈梁：截面为120×60×4(mm3)，沿屏蔽舱顶部周圈设置；顶龙骨：截面为50×30×3(mm3)，跨度为1m，形成1m×1m网格；
    所述屏蔽舱的地面满铺40×2(mm2)屏蔽钢板，间距500mm均布，地圈梁规格为150×100×4(mm3)，地面采用3mm厚屏蔽钢板。
  3. 如权利要求2所述的高屏蔽性大型屏蔽舱，其特征在于，所述屏蔽舱的壳体内侧做镀锌处理，所述屏蔽舱内腔钢结构表面镀锌厚度大于等于50μm；所述屏蔽舱钢壳体外侧安装玻镁板,所述玻镁板厚度2mm；所述玻镁板安装完成后，在所述玻镁板上粘贴白色铝塑板作为装饰面。
  4. 如权利要求3所述的高屏蔽性大型屏蔽舱，其特征在于，所述屏蔽舱地面钢板焊接时沿屏蔽舱长度方向设有0.3％的坡度，并在所述屏蔽舱地面最低处预留水波导将水做过壁处理后排出屏蔽舱外，土建预留相应管道汇入地下排水管网。
  5. 如权利要求4所述的高屏蔽性大型屏蔽舱，其特征在于，所述屏蔽舱左右两侧各设置一樘垂直升降屏蔽门，规格为3.6m×1m；所述屏蔽门通过电动铰链拉动开启和闭合，所述屏蔽门主体采用H型钢构支撑，所述屏蔽门门扇主体在钢构内的导轨上运行，所述屏蔽门是完全自动化的推拉门，通过气动阀门和电器元件进行组合控制，所述屏蔽门的所有控制均通过安装在主控制面板上的逻辑控制器实现，所述屏蔽门的能通过电脑远程控制；
    屏蔽门材料的组成包括：铍青铜、120×80×6mm方管、1.2mm镀锌板、1.2mm冷轧钢板、纯锡条、螺丝；所述屏蔽门首先由120×80×6mm方管组成框架结构，门面采用1.2mm厚镀锌板，边框朝向屏蔽舱部分开口，内部含有气囊，气囊外包裹一层铍青铜，当屏蔽门下降到预定位置时，充气闭门，起到屏蔽效果；
    所述屏蔽门的锁紧为双点斜楔锁紧结构，采用单刀插入式电磁密封技术，以铁为基体的镀铜复合刀口，可拆卸式铍青铜双排簧片，能有效地形成电磁密封腔，电磁密封可靠；所述屏蔽门内外门板为双层绝缘结构；
    所述屏蔽门参数、性能：800MHz～1.5GHz，屏蔽效能：大于等于100dB，提升气缸使用压力0.5MPa，气囊充气压力0.1MPa，
    所述屏蔽门的运行流程为：开门、放气20s、提升气缸准备、提升信号、点动、屏蔽门上升、提升到位、等待、下降信号、点动、屏蔽门下降、下降到位、充气闭门。
  6. 如权利要求5所述的高屏蔽性大型屏蔽舱，其特征在于，所述屏蔽门采用电动平移(X、Y方向)的传动方式，锁紧采用气动锁紧，升降台采用液压油缸驱动模式。
  7. 如权利要求6所述的高屏蔽性大型屏蔽舱，其特征在于，所述模式搅拌装置包括：金属扇叶、电机、非金属传动杆、过壁圆波导；所述金属扇叶由电机驱动，所述电机通过非金属传动杆与所述金属扇叶连接，所述过壁圆波导通过法兰结构与屏蔽舱相连接。
  8. 如权利要求7所述的高屏蔽性大型屏蔽舱，其特征在于，所述玻璃钢托盘由横梁、底板和金属框架组成；所述横梁为玻璃钢材质，两端安装在金属框架上；所述底板为玻璃钢材质；所述框架为钢框架结构，用于固定所述横梁。
  9. 如权利要求8所述的高屏蔽性大型屏蔽舱，其特征在于，所述天馈系统包含八个天馈单元，每个天馈单元均包括频率源、三销钉调谐器、屏蔽窗、通风波导、馈电直波导、E面弯 波导、H面弯波导、弧光探测仪、天线、波导缝隙塞；
    所述频率源置于金属屏蔽墙外面；所述天线置于金属屏蔽墙内，所述天线上部为第一波导缝隙天线，下部为第二波导缝隙天线。
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