Electromagnetic screen door

An electromagnetic shielding door is a special type of door that utilizes electromagnetic shielding technology to block the propagation of electromagnetic waves, protecting equipment and personnel from electromagnetic radiation interference and hazards. The following is a detailed introduction to electromagnetic shielding doors:

Classification

• By Opening Method: Common types include hinged plug-in doors and sliding doors. Hinged plug-in doors achieve the shielding effect through tight contact between the plug-in blade and the door frame. Their structure is relatively simple, installation is convenient, and they are suitable for most electromagnetic shielding rooms. Sliding doors, on the other hand, open and close by moving the door leaf along a guide rail. They offer advantages such as not occupying indoor space and good sealing performance, but their structure is relatively complex and costs are higher. They are often used in shielding rooms with higher spatial requirements.

• By Drive Method: They can be divided into manual, electric, and fully automatic types. Manual shielding doors are economical, do not rely on electricity, and are simple to operate. However, opening and closing can be relatively laborious when dealing with frequent use or heavier door leaves. Electric and fully automatic shielding doors are more convenient, especially suitable for situations where the door leaf is heavy or requires frequent opening and closing. They can achieve automatic opening and closing through motor drives and control systems, and some even come with smart control functions, such as integration with access control systems.

Structural Components

• Door Leaf: Typically made of high-quality cold-rolled steel plates or aluminum alloy and other metal materials, offering good electrical conductivity and mechanical strength. The interior is filled with wave-absorbing materials or other shielding materials to enhance the shielding effect. Some high-end shielding doors also adopt multi-layer metal composite structures or are coated with a highly conductive metal layer, such as copper or silver, to further improve shielding performance.

• Door Frame: Usually made of the same metal material as the door leaf and connected and fixed to the shielding wall or shielding shell. The door frame is equipped with conductive contact structures that match the door leaf's plug-in blade or spring leaves, such as beryllium bronze spring leaves or copper-plated composite blades, to ensure tight contact and good electrical continuity between the door leaf and the frame.

• Sealing Device: To ensure the sealing performance of the shielding door and prevent electromagnetic leakage, rubber sealing strips or other elastic sealing materials are installed between the door leaf and the frame. The sealing strips not only prevent air leakage but also further enhance the shielding effect, while also providing some degree of sound insulation and dust prevention.

Technical Features

• High Shielding Effectiveness: Capable of meeting different levels of shielding requirements, such as military standard Class C, and providing good shielding effects for electromagnetic waves across various frequency ranges. Generally, the shielding effectiveness can reach over 60dB, effectively preventing the entry and leakage of electromagnetic signals and creating an interference-free working environment for internal equipment.

• Sturdy and Reliable Structure: Main components such as the door leaf and door frame are formed through machine tool stamping and assembled and welded on specialized fixtures, resulting in a sturdy and reliable structure, high dimensional accuracy, excellent geometric shape, and an aesthetically pleasing appearance. Even with frequent opening and closing or long-term use, they maintain good shielding performance and structural stability.

• Flexible and Convenient Operation: Electromagnetic shielding doors can be opened manually or electrically, offering easy and flexible operation, long service life, low failure rates, and convenient maintenance. Some shielding doors are also equipped with emergency devices, such as manual opening mechanisms, to ensure rapid evacuation in case of power outages or malfunctions.

Application Areas

• Research Institutions: In various laboratories, such as electronics, physics, and chemistry labs, electromagnetic shielding doors can effectively block external electromagnetic interference, ensuring the normal operation of experimental equipment and the accuracy of experimental data. For example, they prevent external electromagnetic signals from affecting experimental results during high-precision electronic instrument measurements or experiments.

• Medical Field: In equipment rooms for medical devices such as CT scanners and MRI machines, electromagnetic shielding doors ensure the normal operation of medical equipment, improve the accuracy and reliability of medical diagnosis and treatment, and protect the health and safety of medical staff and patients by avoiding harm from electromagnetic radiation.

• Telecommunications Industry: Telecommunication base stations are surrounded by numerous high-frequency electromagnetic wave sources. Electromagnetic shielding doors can block these waves, ensuring stable signals for base stations and improving communication quality and reliability. Additionally, in the development, production, and testing sites of communication equipment, shielding doors prevent external electromagnetic interference from affecting device performance, ensuring the normal operation of communication equipment.

• Military and Security Fields: Locations such as military command centers, communication hubs, and weapon storage facilities have extremely high requirements for electromagnetic protection. Electromagnetic shielding doors can effectively block enemy electromagnetic interference, radar signals, electromagnetic pulses, and more, ensuring the security of military facilities and the confidentiality of military communications. They prevent the leakage of military classified information and ensure the smooth progress of military operations.

• Electronic Equipment Production and Maintenance: In production workshops and maintenance centers for electronic equipment, electromagnetic shielding doors prevent external electromagnetic interference from affecting the production, testing, and maintenance processes of electronic devices, ensuring product quality and maintenance effectiveness. They also prevent electromagnetic radiation generated during the production process from causing interference and harm to the surrounding environment and personnel.