An electromagnetic interference shielding wood insulating plate assembly for a reactor

Abstract

The present application relates to the technical field of reactor insulation shielding, and discloses a wood insulation shielding plate assembly for a reactor, which comprises a wood insulation shielding main plate, and a reinforced insulation frame is arranged at the outer edge of the wood insulation shielding main plate, a clamping groove is formed in the inner side of the reinforced insulation frame and is clamped with the wood insulation shielding main plate, a sealing filling adhesive tape is filled between the inner wall of the clamping groove and the wood insulation shielding main plate, positioning members are arranged at the four corners of the wood insulation shielding main plate, a sealing buffer is arranged on the bottom wall of the wood insulation shielding main plate, and the sealing buffer is filled between the wood insulation shielding main plate and the shell of the reactor. Through the cooperation of the edge sealing of the epoxy glass L-shaped frame, the full insulation positioning anti-vibration anti-looseness, the micro-porous waveguide cutoff and the heat dissipation shielding, and the sealing gasket buffer anti-slippage, the problems of the short service life of the bare edge of the wood plate, the easy loosening of the metal screw, the contradiction between the heat dissipation hole and the shielding, and the rigid adhesion without buffer are solved.

Description

Technical Field

[0001] This invention relates to the field of reactor insulation and shielding technology, specifically to a wooden insulating shielding board assembly for electromagnetic interference protection of reactors. Background Technology

[0002] Reactors are core passive components in power systems, new energy power generation (photovoltaic / wind power converters), and industrial drives (frequency converters / SVG). They primarily perform functions such as reactive power compensation, harmonic filtering, and fault current limiting. During operation, the windings, excited by alternating current, radiate high-frequency stray electromagnetic waves in the 100kHz-1GHz frequency band. This electromagnetic radiation can not only interfere with the normal operation of sensitive electronic components such as relay protection, PLC sampling, and communication equipment, but may also violate electromagnetic compatibility (EMC) mandatory specifications. Therefore, a dedicated shielding plate assembly must be configured around the reactor to attenuate electromagnetic radiation while meeting insulation requirements and balancing heat dissipation and protection.

[0003] Currently, the mainstream solutions for reactor shielding panels fall into two categories: one is metal shielding panels (cold-rolled steel plates, aluminum plates, etc.), which offer high shielding effectiveness; the other is ordinary wooden insulating shielding panels (plywood, solid wood boards, etc.) coated with an anti-electromagnetic coating, which provides insulation and avoids the risk of electrical conduction. However, both types of shielding panels have certain technical drawbacks in their implementation:

[0004] First, ordinary wooden shielding boards mostly use a bare board structure with no protection on the four sides and ends. During transportation and installation, they are prone to chipping and missing corners due to bumps and knocks. The porous structure of the wood is directly exposed. In electrical cabinets with condensation and in high-humidity outdoor environments, the ends will quickly absorb moisture, causing the boards to swell and deform, reduce insulation performance, and even become moldy and rotten. The lifespan of the components is usually less than 3 years. If metal shielding boards are used, although the protection problem is solved, the conductive properties of metal require an additional insulating pad. Once the insulating pad ages and breaks, it is easy to conduct to the live casing of the reactor and cause a short circuit. In outdoor scenarios, the insulation of the metal plate will further decrease after rusting, highlighting the safety hazards.

[0005] Secondly, wooden shielding panels are often fixed to the reactor housing by metal screws that directly penetrate the panel. Since the metal screws themselves are conductive, if the screws accidentally come into contact with live parts of the reactor housing, it can easily cause a short circuit. Moreover, the screw fixing relies on the self-locking of the threads. Under the high-frequency micro-vibration (frequency 10-200Hz) conditions of reactor operation, the thread preload is easily attenuated. After long-term operation, the probability of loosening exceeds 30%, which leads to the displacement of the shielding panel, poor fit, and reduced shielding effectiveness.

[0006] Third, if ordinary wooden shielding boards do not have ventilation holes, the heat generated by the reactor cannot be dissipated through convection, and the temperature rise on the leeward side of the board can reach over 25°C, accelerating the aging of the reactor's insulation. If ventilation holes with a conventional diameter (≥3mm) are provided, high-frequency electromagnetic waves will leak through the gaps, reducing the shielding effectiveness by more than 40% and failing to meet EMC requirements. Some solutions use metal mesh to cover the ventilation holes, which provides shielding, but the metal mesh is conductive, posing a short-circuit hazard, and is also prone to rust and damage. In addition, there are no size restrictions on ventilation holes with conventional diameters, making it easy for insects and small animals to enter the equipment and cause short circuits.

[0007] Fourth, the traditional wooden shielding board and the reactor shell are rigidly bonded together. The microscopic unevenness of the contact surface between the two makes it easy for dust and moisture to enter. Over time, this accumulation will cause corrosion of the reactor shell and a decrease in insulation. Moreover, the rigid bonding has no buffer, and the vibration of the equipment will be directly transmitted to the shielding board, producing abnormal noise. At the same time, it is easy to cause slight slippage of the shielding board, resulting in electromagnetic wave leakage at the joint.

[0008] In view of this, the present invention proposes a wooden insulating shielding plate assembly for electromagnetic interference protection of reactors. Summary of the Invention

[0009] This invention proposes a wooden insulating shielding plate assembly for electromagnetic interference protection of reactors, which solves the problem of low insulation performance stability of shielding plates in the prior art.

[0010] The technical solution of the present invention is as follows: A wooden insulating shielding plate assembly for electromagnetic interference protection of a reactor includes a wooden insulating shielding main board. The outer edge of the wooden insulating shielding main board is provided with an edge-reinforced insulating frame. The inner side of the edge-reinforced insulating frame is provided with a slot for engaging with the wooden insulating shielding main board. A sealing filler strip is filled between the inner wall of the slot and the wooden insulating shielding main board. Positioning members for fixing to the outer shell of the reactor are provided at the four corners of the wooden insulating shielding main board. A sealing buffer member is provided on the bottom wall of the wooden insulating shielding main board. The sealing buffer member is filled between the wooden insulating shielding main board and the outer shell of the reactor.

[0011] Preferably, the positioning component includes an insulating sleeve, the bottom of which is fixedly connected to an insulating locking screw that is threaded into the outer shell of the reactor, and an anti-slip pad is sleeved on the outer side of the insulating locking screw.

[0012] Preferably, the wooden insulating shielding main board has positioning holes on all four sides, and the insulating locking screw passes through the positioning holes and slides with them.

[0013] Preferably, the wooden insulating shielding main board has a plurality of arrayed heat dissipation micro-holes for heat dissipation of the reactor.

[0014] Preferably, the micropore diameter of the heat dissipation micropores is 0.5-1mm, the spacing between the pores is 5-8mm, and the distribution of the heat dissipation micropores does not affect the shielding performance of the wooden insulating shielding motherboard.

[0015] Preferably, the sealing buffer includes a sealing gasket, and the top surface of the sealing gasket has anti-slip texture.

[0016] Preferably, the thickness of the sealing gasket is 2-5mm, and the sealing gasket is bonded and fixed to the mating end face of the wooden insulating shielding main board by high temperature resistant insulating adhesive.

[0017] Preferably, both sides of the wooden insulating shielded motherboard are coated with an anti-electromagnetic interference coating. The anti-electromagnetic interference coating includes a moisture-proof insulating layer, an electromagnetic loss shielding layer, and a wear-resistant and corrosion-resistant layer, which are applied sequentially from the inside to the outside.

[0018] Preferably, the moisture-proof insulation layer is a modified epoxy resin coating with a thickness of 0.1-0.2 mm, which has the functions of moisture-proof, insulation and substrate adhesion enhancement.

[0019] The electromagnetic loss shielding layer is a composite shielding coating of carbonyl iron powder and graphene, with a thickness of 0.15-0.4 mm, used to absorb and attenuate high-frequency stray electromagnetic waves generated by the reactor and suppress electromagnetic radiation leakage.

[0020] The wear-resistant and corrosion-resistant layer is a polyurethane wear-resistant coating with a thickness of 0.05-0.2mm, which has anti-aging, anti-corrosion and wear-resistant properties.

[0021] Preferably, the edge-reinforced insulating frame is an epoxy fiberglass board with an L-shaped cross-section, which is attached to the end faces of the four sides of the wooden insulating shielding main board by a slot connection.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. The edge-reinforced insulating frame is made of epoxy fiberglass board with an L-shaped cross-section. It is tightly connected to the four sides of the wooden insulating shielding main board through the inner groove. The gap between the grooves is filled with sealing strips and cured to form a continuous elastic sealing layer, which physically blocks the path of moisture intrusion along the porous texture of the wood end face. This design enables the edge protection level of the board to reach IP54, completely solving the industry problem of traditional bare-edge wooden boards having "end face moisture absorption → expansion and deformation → insulation reduction → mold and rot" and short lifespan in electrical cabinets and outdoor high humidity environments. The L-shaped cross-section also creates high-strength mechanical protection corners, improving the ability to resist edge chipping and corner damage under transportation and installation impact conditions. The insulation and weather resistance of the epoxy fiberglass itself, combined with the elastic sealing of the sealing strips, significantly extends the effective life of the component under humid conditions.

[0024] 2. The positioning component adopts a double insulation structure of "insulating sleeve + insulating locking screw". The insulating locking screw passes through the positioning holes at the four corners of the wooden main board and is tightened into the pre-embedded threaded holes on the reactor shell. The insulating sleeve forms an electrical isolation layer between the screw and the wooden main board. The anti-slip pad is pressed between the top of the insulating sleeve and the upper surface of the wooden board. The rough surface generates a large static friction force to resist high-frequency micro-vibrations of 10-200Hz. This design completely cuts off the conductive path between the metal fastener and the live parts, eliminating the risk of short circuits caused by accidental contact with live parts by traditional metal screws. The frictional damping provided by the anti-slip pad ensures that the locking structure remains zero loosening under long-term high-frequency vibration of the reactor. The pre-tightening force attenuation rate is lower than that of traditional threaded self-locking schemes. The structural stability and safety of the component under strong vibration conditions are improved simultaneously, solving the pain point of high loosening probability in traditional solutions.

[0025] 3. The wooden mainboard features an array of micro-holes for heat dissipation. The pore size allows for free convection heat exchange of air molecules, while being much smaller than the wavelength of electromagnetic waves in the 100kHz-1GHz frequency band. Based on the waveguide cutoff effect, high-frequency stray electromagnetic waves are drastically attenuated when passing through the holes. The reasonable hole spacing ensures that the overall structural strength and shielding effectiveness of the board are not compromised. This design, while ensuring the overall shielding effectiveness of the wooden mainboard, allows the heat generated by the reactor to be effectively dissipated through natural convection, reducing the temperature rise on the leeward side of the board by 15-20℃. The 0.5-1mm micro-holes also prevent accidental contact by fingers / tools or the entry of insects and small animals that could cause short circuits. This achieves a triple balance of "heat dissipation + shielding + safety protection," avoiding the dilemma of decreased shielding effectiveness due to hole size or the tendency of metal mesh to corrode and conduct electricity.

[0026] 4. The sealing buffer uses a 2-5mm thick sealing gasket, which is bonded to the bottom wall of the wooden mainboard with high-temperature resistant insulating adhesive. Anti-slip textures are created on the top surface. In the locked state, the sealing gasket's controlled compression deformation fills the microscopic uneven gaps between the wooden mainboard and the reactor shell. The 2-5mm thickness provides optimal compression margin, ensuring airtightness, dust and moisture protection while preventing excessive compression and permanent deformation. The anti-slip textures increase the static friction coefficient of the interface, effectively suppressing minor slippage of the board under strong electromagnetic forces. The sealing gasket's damping energy absorption also absorbs mechanical vibrations during equipment operation, reducing abnormal noise. This design replaces the traditional rigid bonding solution, upgrading from "rigid transmission of abnormal noise + dust and moisture ingress through gaps" to a stable bonding state of "flexible sealing + damping energy absorption."

[0027] 5. The wooden motherboard adopts a gradient composite coating system of "moisture-proof insulation layer → electromagnetic loss shielding layer → wear-resistant and corrosion-resistant layer": the inner modified epoxy is used to seal the pores of the wood, enhance adhesion and provide basic insulation; the middle layer constructs a dual mechanism of magnetic loss and dielectric loss through the synergistic composite of carbonyl iron powder and graphene, which efficiently converts the incident electromagnetic wave energy into heat energy dissipation; the outer polyurethane layer provides excellent scrub resistance and chemical reagent corrosion resistance. This integrated "insulation-shielding-protection" design not only gives the wooden substrate good electrical and thermal conductivity, but also significantly improves its electromagnetic compatibility (EMC) level, enabling it to have reliable electromagnetic interference suppression capabilities in the 100kHz-1GHz frequency band. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a schematic diagram of the structure of a wooden insulating shielding plate assembly for electromagnetic interference protection of a reactor according to the present invention. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the structure of a wooden insulating shielding plate assembly for electromagnetic interference protection of a reactor according to the present invention. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the edge-reinforced insulating frame structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the wooden insulating shielding mainboard of the present invention;

[0033] Figure 5 This is a schematic diagram of the positioning component of the present invention;

[0034] Figure 6 This is a schematic diagram of the sealing buffer component of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the anti-electromagnetic interference coating of the present invention.

[0036] In the diagram: 1. Wooden insulating shielded main board; 11. Positioning hole; 12. Heat dissipation micropore; 13. Anti-electromagnetic interference coating; 131. Moisture-proof insulation layer; 132. Electromagnetic loss shielding layer; 133. Wear-resistant and corrosion-resistant layer; 2. Edge-reinforced insulating frame; 21. Card slot; 22. Sealing filler strip; 3. Positioning component; 31. Insulating sleeve; 32. Insulating locking screw; 33. Anti-slip pad; 4. Sealing buffer component; 41. Sealing gasket; 42. Anti-slip texture; 10. Reactor. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 7 As shown, this embodiment proposes an anti-electromagnetic interference wooden insulating shielding board assembly for reactors, including a wooden insulating shielding main board 1, an edge-reinforced insulating frame 2 is provided on the outer edge of the wooden insulating shielding main board 1, and a slot 21 is provided on the inner side of the edge-reinforced insulating frame 2 to engage with the wooden insulating shielding main board 1. The edge-reinforced insulating frame 2 is an epoxy fiberglass board with an L-shaped cross section and is covered on the end faces of the four sides of the wooden insulating shielding main board 1 by engaging with the slot 21.

[0039] The inner wall of the card slot 21 is filled with a sealing filler strip 22 between it and the wooden insulating shield main board 1. The four corners of the wooden insulating shield main board 1 are provided with positioning parts 3 that are fixed to the outer shell of the reactor 10. The bottom wall of the wooden insulating shield main board 1 is provided with a sealing buffer part 4, which is filled between the wooden insulating shield main board 1 and the outer shell of the reactor 10.

[0040] In this embodiment, the edge-reinforced insulating frame 2 is made of epoxy fiberglass board with an L-shaped cross-section. It is tightly fastened to the four-sided end face of the wooden insulating shielding main board 1 through the slot 21 opened on the inner side. The tiny gap reserved between the inner wall of the slot 21 and the edge of the wooden insulating shielding main board 1 is completely filled by the sealing and filling strip 22. After curing, it forms a continuous elastic sealing layer, which physically blocks the path of water vapor to penetrate along the texture of the board end face.

[0041] The L-shaped cross-section design creates a high-strength mechanical protection corner at the edge of the wooden insulating shielding main board 1, greatly improving the impact resistance of the board edge and effectively preventing chipping and corner breakage during transportation and installation. The epoxy fiberglass material itself has excellent insulation and weather resistance, and together with the elastic seal of the sealing filler strip 22, the edge protection level of the board reaches IP54, completely solving the industry problem of wooden substrates being prone to moisture absorption, expansion, and mold growth in humid electrical cabinet environments, and extending the service life of the components.

[0042] In a further preferred embodiment of the present invention, the positioning component 3 includes an insulating sleeve 31, and an insulating locking screw 32 that is threadedly connected to the bottom of the insulating sleeve 31 and engages with the outer shell of the reactor 10. An anti-slip pad 33 is sleeved on the outer side of the insulating locking screw 32. Positioning holes 11 are provided around the wooden insulating shielding main board 1. The insulating locking screw 32 passes through the positioning holes 11 and slides with them.

[0043] In this embodiment, the insulating locking screw 32 passes through the positioning holes 11 at the four corners of the wooden insulating shield main board 1 and is tightened and fixed with the pre-embedded threaded holes on the outer shell of the reactor 10; the insulating sleeve 31 is fitted on the outside of the insulating locking screw 32, forming an electrical isolation layer between the screw and the wooden substrate; the anti-slip pad 33 is fitted on the insulating locking screw 32 and is pressed between the top of the insulating sleeve 31 and the upper surface of the wooden insulating shield main board 1. Its rough surface generates huge static friction force to resist high-frequency micro-vibration during equipment operation;

[0044] The double insulation design of the insulated locking screw 32 and the insulating sleeve 31 completely cuts off the conductive path between the metal fastener and the live part. The insulation resistance is relatively large, which fundamentally eliminates the risk of short circuit caused by the screw conducting electricity. The friction damping provided by the anti-slip pad 33 ensures that the locking structure remains loose even under the long-term high-frequency vibration environment of the reactor. The pre-tightening force attenuation rate is low, which greatly improves the structural stability and safety of the component under strong vibration conditions.

[0045] In a further preferred embodiment of the present invention, a plurality of arrayed heat dissipation microholes 12 are provided on the wooden insulating shielding main board 1 for heat dissipation of the reactor 10. The microhole diameter of the heat dissipation microholes 12 is 0.5-1mm and the spacing between the holes is 5-8mm. The distribution position of the heat dissipation microholes 12 does not affect the shielding performance of the wooden insulating shielding main board 1.

[0046] In this embodiment, the micro-hole array design ensures the overall shielding effectiveness of the wooden insulating shielding motherboard 1, while allowing the heat generated by the reactor to be effectively dissipated through natural convection, reducing the temperature rise on the leeward side of the board by 15-20°C. The tiny aperture of 0.5-1mm prevents accidental contact with fingers or tools, improving operational safety, and also prevents insects and other small animals from entering the equipment and causing short circuits, thus achieving a balance between heat dissipation, shielding, and safety protection.

[0047] In a further preferred embodiment of the present invention, the sealing buffer 4 includes a sealing gasket 41, the top surface of which is provided with anti-slip texture 42, the thickness of the sealing gasket 41 is 2-5mm, and the sealing gasket 41 is bonded and fixed to the bonding end face of the wooden insulating shielding main board 1 by high temperature resistant insulating adhesive.

[0048] In this embodiment, a sealing gasket 41 with a thickness of 2-5mm is bonded and fixed to the bottom wall of the wooden insulating shielding main board 1 with high temperature resistant insulating adhesive. The anti-slip texture 42 on its top surface generates greater contact friction when it is deformed under pressure. When the wooden insulating shielding main board 1 is locked onto the outer shell of the reactor 10 by the positioning member 3, the sealing gasket 41 undergoes controllable compression deformation, filling the microscopic uneven gap between the two, and at the same time absorbing the mechanical vibration energy generated by the operation of the equipment.

[0049] The compression and rebound characteristics of the sealing gasket 41 not only achieve an airtight connection between the wooden insulating shielding main board 1 and the reactor shell, preventing dust and moisture intrusion, but its 2-5mm thickness range also provides the optimal compression margin, ensuring a sealing effect without causing permanent deformation due to excessive compression. The anti-slip texture 42 design increases the static friction coefficient of the interface, effectively suppressing the slight slippage of the board under strong electromagnetic force. Combined with the damping and energy absorption effect of the sealing buffer 4, it greatly reduces the operating noise of the equipment.

[0050] In a further preferred embodiment of the present invention, both sides of the wooden insulating shielded main board 1 are coated with an anti-electromagnetic interference coating 13. The anti-electromagnetic interference coating 13 includes a moisture-proof insulating layer 131, an electromagnetic loss shielding layer 132, and a wear-resistant and corrosion-resistant layer 133, which are applied sequentially from the inside to the outside.

[0051] The moisture-proof insulation layer 131 is a modified epoxy resin coating with a thickness of 0.1-0.2mm, which has the functions of moisture-proof, insulation and substrate adhesion enhancement.

[0052] The electromagnetic loss shielding layer 132 is a composite shielding coating of carbonyl iron powder and graphene, with a thickness of 0.15-0.4mm. It is used to absorb and attenuate high-frequency stray electromagnetic waves generated by the reactor and suppress electromagnetic radiation leakage.

[0053] The wear-resistant and corrosion-resistant layer 133 is a polyurethane wear-resistant coating with a thickness of 0.05-0.2mm, which has anti-aging, anti-corrosion and wear-resistant properties.

[0054] In this embodiment, three functional coatings are sequentially applied to both sides of the wooden insulating shielding motherboard 1: the innermost moisture-proof insulating layer 131 (0.1-0.2mm modified epoxy resin) seals the pores of the wood, strengthens the adhesion of the substrate, and provides basic insulation; the middle electromagnetic loss shielding layer 132 (0.15-0.4mm carbonyl iron powder / graphene composite material) utilizes the magnetic loss of carbonyl iron powder and the electrical loss mechanism of graphene to convert the energy of the incident high-frequency electromagnetic waves into heat energy; the outermost wear-resistant and corrosion-resistant layer 133 (0.05-0.2mm polyurethane) resists external environmental erosion and protects the lower coating layer from damage.

[0055] This integrated "insulation-shielding-protection" design not only gives the wood substrate good electrical and thermal conductivity, but also significantly improves its electromagnetic compatibility (EMC) level, enabling it to have reliable electromagnetic interference suppression capabilities in the 100kHz-1GHz frequency band.

[0056] The modified epoxy resin coating ensures that the coating does not crack or powder under thermal cycling, while the graphene composite shielding layer gives the board excellent electrical and thermal conductivity. The wear-resistant and corrosion-resistant layer makes it resistant to daily cleaning and chemical reagent corrosion, meeting the long-term reliable operation requirements of the reactor in complex industrial environments.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wooden insulating shielding board assembly for electromagnetic interference protection of reactors, comprising a wooden insulating shielding main board (1), characterized in that, Both sides of the wooden insulating shielding motherboard (1) are coated with an anti-electromagnetic interference coating (13). The anti-electromagnetic interference coating (13) includes a moisture-proof insulating layer (131), an electromagnetic loss shielding layer (132), and a wear-resistant and corrosion-resistant layer (133). The moisture-proof insulating layer (131), the electromagnetic loss shielding layer (132), and the wear-resistant and corrosion-resistant layer (133) are coated sequentially from the inside to the outside. The outer edge of the wooden insulating shielding main board (1) is provided with an edge-reinforced insulating frame (2). The inner side of the edge-reinforced insulating frame (2) is provided with a slot (21) that engages with the wooden insulating shielding main board (1). The inner wall of the slot (21) and the wooden insulating shielding main board (1) are filled with a sealing filler strip (22). The four corners of the wooden insulating shielding main board (1) are provided with positioning parts (3) that are fixed to the outer shell of the reactor (10). The bottom wall of the wooden insulating shielding main board (1) is provided with a sealing buffer (4). The sealing buffer (4) is filled between the wooden insulating shielding main board (1) and the outer shell of the reactor (10).

2. The electromagnetic interference protection wooden insulating shielding board assembly for a reactor according to claim 1, characterized in that, The positioning component (3) includes an insulating sleeve (31), and the bottom of the insulating sleeve (31) is fixedly connected to an insulating locking screw (32) that is threaded to the outer shell of the reactor (10). An anti-slip pad (33) is sleeved on the outside of the insulating locking screw (32).

3. The electromagnetic interference protection wooden insulating shielding board assembly for a reactor according to claim 2, characterized in that, The wooden insulating shielding main board (1) has positioning holes (11) on all four sides, and the insulating locking screw (32) passes through the positioning holes (11) and slides with them.

4. The electromagnetic interference protection wooden insulating shielding board assembly for a reactor according to claim 1, characterized in that, The wooden insulating shielding main board (1) has several arrayed heat dissipation micro-holes (12) for heat dissipation of the reactor (10).

5. A wooden insulating shielding board assembly for electromagnetic interference protection of reactors according to claim 4, characterized in that, The micropore diameter of the heat dissipation micropores (12) is 0.5-1mm and the spacing between the pores is 5-8mm. The distribution of the heat dissipation micropores (12) does not affect the shielding performance of the wooden insulating shielding motherboard (1).

6. The electromagnetic interference protection wooden insulating shielding board assembly for a reactor according to claim 1, characterized in that, The sealing buffer (4) includes a sealing pad (41), and the top surface of the sealing pad (41) is provided with anti-slip texture (42).

7. A wooden insulating shielding plate assembly for electromagnetic interference protection of reactors according to claim 6, characterized in that, The thickness of the sealing gasket (41) is 2-5mm, and the sealing gasket (41) is bonded and fixed to the mating end face of the wooden insulating shielding main board (1) by high temperature resistant insulating adhesive.

8. A wooden insulating shielding board assembly for electromagnetic interference protection of reactors according to claim 1, characterized in that, The moisture-proof insulation layer (131) is a modified epoxy resin coating with a thickness of 0.1-0.2 mm, which has the functions of moisture-proof, insulation and substrate adhesion enhancement. The electromagnetic loss shielding layer (132) is a carbonyl iron powder and graphene composite shielding coating with a thickness of 0.15-0.4mm. It is used to absorb and attenuate the high-frequency stray electromagnetic waves generated by the reactor and suppress electromagnetic radiation leakage. The wear-resistant and corrosion-resistant layer (133) is a polyurethane wear-resistant coating with a thickness of 0.05-0.2mm, which has anti-aging, anti-corrosion and wear-resistant properties.

9. A wooden insulating shielding board assembly for electromagnetic interference protection of reactors according to claim 1, characterized in that, The edge-reinforced insulating frame (2) is an epoxy fiberglass board with an L-shaped cross section and is attached to the end faces of the four sides of the wooden insulating shielding main board (1) by means of a slot (21).

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