A two-dimensional upload double-cylinder shield wave-absorbing door and a method for using the same

Abstract

This invention discloses a two-dimensional upper-drive dual-cylinder shielded microwave-absorbing door and its usage method, belonging to the field of shielding equipment technology. The invention includes a door frame, door leaf, zero-plane sill, suspension gantry, drive mechanism, microwave-absorbing material, and control unit. The door leaf is installed in front of the door frame via the suspension gantry, and the zero-plane sill is pre-embedded in the bottom of the door frame. This invention uses cylinders to precisely control the contact pressure between the spring and the copper plate, significantly reducing the stringent requirements for processing and assembly precision in traditional insert-type structures, improving the reliability of electromagnetic shielding connections. The fully embedded door leaf design ensures a flat door surface, eliminating the need for an additional microwave-absorbing back frame. The introduction of conductive foam effectively compensates for unevenness in the contact surface, further enhancing shielding stability and engineering adaptability. It eliminates the need for a sill lifting platform and complex mechanical interlocking devices, significantly simplifying civil engineering requirements and on-site installation difficulties.

Description

Technical Field

[0001] This invention belongs to the field of shielding equipment technology, and in particular relates to a two-dimensional upper-drive double-cylinder shielding absorbing door and its usage method. Background Technology

[0002] Because anechoic chambers are primarily used for electromagnetic wave reflection-free testing environments, they are lined with absorbing materials to eliminate reflection interference. Therefore, the shielding doors used in anechoic chambers have a more complex structure while still meeting high shielding effectiveness requirements. They require a transition structure integrating the absorbing material, and the door leaf or frame may need special design to accommodate or match the absorbing material, ensuring a continuous absorbing environment within the anechoic chamber cavity when the door is closed. This makes the cost of anechoic chamber shielding doors typically much higher than that of ordinary shielded chamber shielding doors.

[0003] Doors used for goods entry and exit often require a large passageway. Larger doors typically employ a hinged rotating design, which is difficult to achieve with a single opening. Double opening doors, on the other hand, face significant challenges in shielding the gaps between the door panels. Furthermore, the hinged rotating design ensures a smooth and seamless connection between the door edges, sealing strips, and the absorbing materials, preventing electromagnetic wave reflections caused by material breaks or mismatches at the door seams, thus maintaining the "no reflection" testing environment of the anechoic chamber. Therefore, a sliding mechanism is usually used for opening and closing the door.

[0004] Because the shielded door is covered with wave-absorbing material, the opening and closing process of the door changes. First, when closing, the door must be moved horizontally into position, then moved forward towards the door frame, and finally, the locking mechanism pulls the door leaf blade into the slot containing the spring. Conversely, to open, the blade must first be pushed out of the slot containing the spring, then the door must be pushed back towards the door frame, and finally moved horizontally away from the door frame. In other words, the opening and closing process involves movement in two directions.

[0005] As shielded doors for goods entry and exit, they are typically designed without thresholds. However, blade-type electromagnetic shielded doors use blades inserted into slots containing springs (whether single-blade, double-blade, or triple-blade) to establish a conductive connection between the door leaf and the frame, achieving shielding. Therefore, blade-type shielded doors require a lower door frame, while doors for goods entering and exiting a dark room cannot have thresholds. Thus, the lower door frame is usually embedded below ground level, and a lifting platform is used to facilitate the entry and exit of goods. Summary of the Invention

[0006] The purpose of this invention is to provide a two-dimensional upper-drive double-cylinder shielded wave-absorbing door and its usage method. Through the structural cooperation of the conductive connection mechanism, it solves the problems of existing anechoic chamber shielding doors, which require the installation of a lower door frame and lifting platform, have complex installation and civil engineering coordination, long construction period, and require extremely high processing and assembly precision for the insert-type structure, which is prone to deformation or wear leading to a decrease in shielding effectiveness. The door needs to move in multiple directions during opening and closing, and the traditional drive method has poor stability and is prone to vibration and noise.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] This invention relates to a two-dimensional, top-driven, dual-cylinder shielded wave-absorbing door, comprising a door frame, a door leaf, a zero-plane threshold, a suspension gantry, a drive mechanism, wave-absorbing material, and a control unit. The door leaf is installed in front of the door frame via the suspension gantry. The zero-plane threshold is embedded in the bottom of the door frame. The drive mechanism includes a horizontal drive component and a vertical drive component, driven by a geared motor, to achieve two-dimensional displacement of the door leaf in the horizontal and vertical directions. The surface of the door leaf is covered with wave-absorbing material, and the door leaf is fitted inside the door frame with its outer surface flush with the door frame. A conductive connection mechanism is provided between the door frame and the door leaf, including a first cylinder installed on the inner side of the top of the door frame and the inner sides of both sides, a first spring installed at the output end of the first cylinder, a first copper plate installed on the outer side of the top of the door leaf and the outer sides of both sides, a second cylinder installed at the bottom of the door leaf, a second spring installed at the output end of the second cylinder, and a second copper plate installed on the top of the zero-plane threshold.

[0009] The present invention is further configured such that conductive foam is provided between the output end of the first cylinder and the first reed, and between the second cylinder and the second reed. The conductive foam has a compensation function, which can reduce the requirements for the surface quality of the door leaf.

[0010] The present invention is further configured such that the suspended gantry includes a horizontal track and an arc-shaped steering track, so as to achieve seamless steering and smooth movement during the opening and closing of the door.

[0011] The invention is further configured such that the door frame is a sealed structure with a cylinder mounting cavity inside, and the door leaf is completely embedded inside the door frame when closed.

[0012] The invention is further configured such that the absorbing material is laid on the surface of the door leaf, and its thickness matches the thickness of the absorbing material in the shielding chamber space inside the door frame, so as to ensure that the absorbing surface is continuous and uninterrupted when the door leaf is closed.

[0013] The present invention is further configured such that the control unit includes an LCD touch screen, a PLC controller, an infrared beam sensor, and an audible and visual alarm device, thereby realizing intelligent control and safety protection.

[0014] The present invention is further configured such that, after the first reed contacts the first copper plate, an electromagnetic shielding connection is achieved, and after the second reed contacts the second copper plate, an electromagnetic shielding connection is achieved simultaneously.

[0015] A method for using a two-dimensional upper-drive dual-cylinder shielded wave-absorbing door includes the following steps;

[0016] S1: The door is controlled by an LCD touch screen interface, which makes human-machine interaction more direct. It supports password opening. The touch screen displays the instructions for use, daily maintenance, and common faults of the platform screen door. The usage, maintenance, and fault information is concise and clear. At the same time, according to the user's own needs, other welcome messages, advertising materials, etc. can be entered.

[0017] S2: When closing the door, the staff presses the door closing button, and the door moves along the horizontal track. At this time, the rotating warning light works. Before changing direction, the door decelerates and moves along the arc-shaped turning track, seamlessly changing the direction of the door's movement. It continues to move until it is fully closed, then decelerates forward. After the door is fully closed, the first and second cylinders start synchronously. The first cylinder pushes the first spring to contact the first copper plate, and the second cylinder pushes the second spring to contact the second copper plate, making the door electrically connected to the door frame and achieving the shielding function. At this time, the rotating warning light stops working, the "Testing" sign lights up, and the entire door closing action ends.

[0018] S3: When opening the door, press the door opening button. The first and second cylinders close simultaneously. The first cylinder drives the first spring away from the first copper plate, and the second cylinder drives the second spring away from the second copper plate. After a three-second delay, the drive mechanism moves the door. At this time, the "Testing" sign goes out, the rotating warning light works, and the wave-absorbing material decelerates and moves backward before exiting the door frame. It moves along the arc-shaped turning track, seamlessly changing the direction of movement. Before the door is in place, it decelerates. After the door is in place, the rotating warning light stops working, and the entire door opening action ends.

[0019] S4: The entire opening and closing action is controlled by logic and equipped with an infrared anti-pinch device. Once an illegal intrusion signal is received, the opening and closing action will stop immediately and will not resume until a new opening and closing signal is given.

[0020] This invention offers the following advantages: By precisely controlling the contact pressure between the spring and the copper plate using a cylinder, it significantly reduces the stringent requirements for processing and assembly precision inherent in traditional insert-type structures, thereby improving the reliability of electromagnetic shielding connections. The fully embedded door panel design ensures a smooth door surface, eliminating the need for an additional wave-absorbing back frame. This optimizes the appearance, reduces costs and assembly difficulty. The introduction of conductive foam effectively compensates for unevenness in the contact surface, further enhancing shielding stability and engineering adaptability. This design completely eliminates the need for a threshold lifting platform and complex mechanical interlocking devices, significantly simplifying civil engineering requirements and on-site installation difficulties. Overall, it achieves a comprehensive advantage of higher reliability, lower cost, and easier maintenance.

[0021] Adjusting the air supply pressure regulates the contact area and clamping force between the spring and the copper plate of the door, thereby improving the shielding effectiveness (SE) of the shielded door, enhancing its performance stability and service life, and significantly reducing maintenance costs. Additionally, in case of power outages or malfunctions, the door can be manually opened to ensure safety.

[0022] The cylinder-sealed shielding door is an ideal replacement for the airbag-sealed shielding door. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0024] Figure 1 This is a three-dimensional schematic diagram of the closure of a two-dimensional, top-driven, double-cylinder shielded wave-absorbing door and its usage method.

[0025] Figure 2 This is a schematic diagram of the opening of a two-dimensional upper-drive double-cylinder shielded wave-absorbing door and its usage method.

[0026] Figure 3 This is a schematic diagram showing the connection between the second cylinder, the second reed, and the second copper plate in a two-dimensional upper-drive double-cylinder shielded wave-absorbing door and its usage method.

[0027] Figure 4 This is a schematic diagram showing the connection of the first cylinder, the first reed, and the first copper plate in a two-dimensional upper-drive double-cylinder shielded wave-absorbing door and its usage method.

[0028] Figure 5 This is a schematic diagram showing the connection of the first cylinder, the first spring, and the conductive foam in a two-dimensional upper-drive double-cylinder shielded wave-absorbing door and its usage method.

[0029] Figure 6 This is a schematic diagram of the structure of a shielding door frame in the prior art.

[0030] Figure 7This is a schematic diagram of the opening of a platform screen door in the prior art.

[0031] Figure 8 This is a schematic diagram of the closing of a platform screen door in the prior art.

[0032] Figure 9 This is a schematic diagram of the locking structure of a shielding door in the prior art.

[0033] In the attached diagram: 1. Door frame; 2. Door leaf; 3. Zero-plane threshold; 4. Suspension gantry; 5. Drive mechanism; 6. Wave-absorbing material; 7. Conductive connection mechanism; 71. First cylinder; 72. First spring; 73. First copper plate; 74. Second cylinder; 75. Second spring; 76. Second copper plate; 8. Conductive foam; Detailed Implementation

[0034] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Example 1

[0036] Please see Figures 1-5 This invention relates to a two-dimensional upper-drive dual-cylinder shielded wave-absorbing door and its usage method, comprising a door frame 1, a door leaf 2, a zero-plane threshold 3, a suspension gantry 4, a drive mechanism 5, wave-absorbing material 6, and a control unit. The door leaf 2 is installed in front of the door frame 1 via the suspension gantry 4. The zero-plane threshold 3 is embedded in the bottom of the door frame 1. The drive mechanism 5 includes a horizontal drive component and a vertical drive component, driven by a geared motor, to realize the two-dimensional displacement of the door leaf 2 in the horizontal and vertical directions. The surface of the door leaf 2 is covered with wave-absorbing material 6. The door leaf 2 is fitted inside the door frame 1 and its outer surface is flush with the door frame 1. A conductive connection mechanism 7 is provided between the door frame 1 and the door leaf 2, including a first cylinder 71 installed on the inner side of the top and the inner sides of both sides of the door frame 1, a first spring 72 installed on the output end of the first cylinder 71, a first copper plate 73 installed on the outer side of the top and the outer sides of both sides of the door leaf 2, a second cylinder 74 installed on the bottom of the door leaf 2, a second spring 75 installed on the output end of the second cylinder 74, and a second copper plate 76 installed on the top of the zero-plane threshold 3.

[0037] Specifically: Door frame 1 serves as the installation foundation and fixed support structure for the entire shielded door, and is firmly connected to the main body of the shielded room to form a stable installation foundation. Door leaf 2, as one of the main components for shielding and absorbing wave functions, is installed in front of door frame 1 through a suspension mechanism and can move in both horizontal and vertical directions to realize the opening, closing and sealing of door leaf 2. Zero-plane threshold 3 is embedded below the ground at the bottom of door frame 1 and its top is flush with the finished surface, ensuring unobstructed passage on the ground while providing a foundation for the electrical connection of the lower shielding.

[0038] The suspension gantry 4 serves as the suspension and guiding mechanism for the door leaf 2. It is equipped with a horizontal track and an arc-shaped turning track to ensure that the door leaf 2 can move smoothly and achieve seamless conversion of movement direction during opening and closing. The drive mechanism 5 includes a horizontal drive component and a vertical drive component and is driven by a geared motor to provide power for the precise displacement of the door leaf 2 in both horizontal and vertical directions. The wave-absorbing material 6 is laid on the surface of the door leaf 2 to absorb electromagnetic wave energy. Its thickness matches the thickness of the wave-absorbing material in the shielding chamber space inside the door frame 1 to ensure that the wave-absorbing surface is continuous and uninterrupted when the door is closed. The control unit integrates an LCD touch screen and a PLC controller to realize the automated logic control and status monitoring of the entire opening and closing process. The conductive connection mechanism 7 uses a cylinder to drive a spring to press against a corresponding copper plate to establish a low-resistance electrical path between the door leaf 2, the door frame 1, and the threshold. It is the core component for realizing the electromagnetic shielding function.

[0039] Example 2

[0040] Please see Figures 1-8 Based on Embodiment 1, conductive foam 8 is provided between the output end of the first cylinder 71 and the first spring 72, and between the second cylinder 74 and the second spring 75. The conductive foam 8 has a compensation function, which can reduce the requirements for the surface quality of the door leaf 2. The suspension gantry 4 includes a horizontal track and an arc-shaped turning track to achieve seamless turning and smooth movement of the door leaf 2 during opening and closing. The door frame 1 is a sealed structure with a cylinder mounting cavity inside. The door leaf 2 is completely embedded inside the door frame 1 when closed. The wave-absorbing material 6 is laid on the surface of the door leaf 2, and its thickness matches the thickness of the wave-absorbing material in the shielding chamber space inside the door frame 1 to ensure that the wave-absorbing surface is continuous and uninterrupted when the door leaf 2 is closed.

[0041] Specifically: The first cylinder 71 is installed on the inner side of the top and the inner sides of both sides of the door frame 1. After the door is closed, it pushes the first spring 72 downward so that it makes close contact with the first copper plate 73 on the outer side of the top and the outer sides of both sides of the door leaf 2. The first spring 72 is installed at the output end of the first cylinder 71. Under the action of the first cylinder 71, it forms multi-point elastic contact with the first copper plate 73 to establish a reliable shielding connection on the top and both sides. The first copper plate 73 is installed on the outer side of the top and the outer sides of both sides of the door leaf 2 as a static contact point corresponding to the first spring 72 to complete the electrical connection between the door leaf 2 and the top of the door frame 1. The second cylinder 74 is installed at the bottom of the door leaf 2. After the door is closed, it pushes the second spring 75 downward so that it makes close contact with the second copper plate 76 on the top of the zero-plane threshold 3.

[0042] Example 3

[0043] Please see Figures 1-8Based on Embodiments 1 and 2, the control unit includes an LCD touch screen, a PLC controller, an infrared beam sensor, and an audible and visual alarm device to achieve intelligent control and safety protection. After the first reed 72 contacts the first copper plate 73, an electromagnetic shielding connection is achieved. After the second reed 75 contacts the second copper plate 76, an electromagnetic shielding connection is achieved simultaneously.

[0044] Specifically: The second spring 75 is installed at the output end of the second cylinder 74 and is used to form multi-point elastic contact with the second copper plate 76 under the action of the second cylinder 74 to establish a reliable lower shield connection. The second copper plate 76 is installed on the top of the zero-plane threshold 3 as a static contact point corresponding to the second spring 75, together completing the electrical connection between the door leaf 2 and the ground threshold. The conductive foam 8 is used to compensate for the unevenness of the contact surface to ensure that the pressure between the spring and the copper plate is uniform and reliable.

[0045] The working principle of this invention is as follows: Door leaf 2 is controlled by an LCD touch screen interface, which makes human-machine interaction more direct and supports password opening. The touch screen displays the instructions for use, daily maintenance, and common faults of the shielded door. The usage, maintenance, and fault information is concise and clear. At the same time, according to the user's own needs, other welcome messages, advertising materials, etc. can be entered.

[0046] When closing the door, the staff presses the closing button (touchscreen), and the door leaf 2 moves along the horizontal track (at this time, the rotating warning light is working). Before changing direction, it decelerates and moves along the arc-shaped turning track, seamlessly changing the direction of movement of the door leaf 2. It continues to move until it is closed, then decelerates forward. After the door is closed, the first cylinder 71 and the second cylinder 74 are activated simultaneously. The first cylinder 71 pushes the first spring 72 to contact the first copper plate 73, and the second cylinder 74 pushes the second spring 75 to contact the second copper plate 76, making the door leaf 2 electrically connected to the door frame 1, realizing the shielding function. At this time, the rotating warning light stops working, the "Testing" sign lights up, and the entire closing action ends.

[0047] When opening the door, press the door opening button (touchscreen). The first cylinder 71 and the second cylinder 74 close simultaneously. The first cylinder 71 drives the first spring 72 away from the first copper plate 73, and the second cylinder 74 drives the second spring 75 away from the second copper plate 76, thus releasing the shielding function. After a three-second delay, the drive mechanism 5 drives the door leaf 2 to move (at this time, the "Testing" sign is off, and the rotating warning light is working). The wave-absorbing material 6 decelerates and moves backward before exiting the door frame 1, moving along the arc-shaped turning track, seamlessly changing the direction of movement. Before the door leaf 2 is in place, it decelerates. After the door leaf 2 is in place (at this time, the rotating warning light stops working), the entire door opening action ends.

[0048] The entire opening and closing action is controlled by logic and equipped with an infrared anti-pinch device. Once an illegal intrusion signal is received, the opening and closing action will stop immediately and will not resume until a new opening and closing signal is given.

[0049] The preferred embodiments of the present invention disclosed above are only for the purpose of illustrating the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation described herein. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A two-dimensional upper-drive double-cylinder shielded microwave-absorbing door, comprising a door frame (1), a door leaf (2), a zero-plane threshold (3), a suspended gantry frame (4), a drive mechanism (5), microwave-absorbing material (6), and a control unit, characterized in that: The door leaf (2) is installed in front of the door frame (1) by a hanging gantry frame (4). The zero-plane threshold (3) is embedded in the bottom of the door frame (1). The driving mechanism (5) includes a horizontal driving component and a vertical driving component, which are driven by a geared motor to realize the two-dimensional displacement of the door leaf (2) in the horizontal and vertical directions. The surface of the door leaf (2) is covered with wave-absorbing material (6). The door leaf (2) is fitted into the door frame (1) and its outer surface is flush with the door frame (1). A conductive connection mechanism (7) is provided between the door frame (1) and the door leaf (2), including a first cylinder (71) installed on the inner side of the top and the inner sides of both sides of the door frame (1), a first spring (72) installed on the output end of the first cylinder (71), a first copper plate (73) installed on the outer side of the top and the outer sides of both sides of the door leaf (2), a second cylinder (74) installed on the bottom of the door leaf (2), a second spring (75) installed on the output end of the second cylinder (74), and a second copper plate (76) installed on the top of the zero-plane threshold (3); conductive foam (8) is provided between the output end of the first cylinder (71) and the first spring (72), and between the second cylinder (74) and the second spring (75). The conductive foam (8) has a compensation function and can reduce the requirements for the surface quality of the door leaf (2); the suspended gantry frame (4) includes a horizontal track and an arc-shaped turning track to realize seamless turning and smooth movement of the door leaf (2) during the opening and closing process.

2. The two-dimensional upper-drive double-cylinder shielded wave-absorbing door according to claim 1, characterized in that: The door frame (1) is a sealed structure with a cylinder mounting cavity inside. The door leaf (2) is completely embedded inside the door frame (1) when closed.

3. The two-dimensional upper-drive double-cylinder shielded wave-absorbing door according to claim 1, characterized in that: The absorbing material (6) is laid on the surface of the door leaf (2), and its thickness matches the thickness of the absorbing material in the shielding room space inside the door frame (1) to ensure that the absorbing surface is continuous and uninterrupted when the door leaf (2) is closed.

4. The two-dimensional upper-drive double-cylinder shielded wave-absorbing door according to claim 1, characterized in that: The control unit includes an LCD touch screen, a PLC controller, an infrared beam sensor, and an audible and visual alarm device, enabling intelligent control and safety protection.

5. A two-dimensional upper-drive double-cylinder shielded wave-absorbing door according to claim 1, characterized in that: After the first reed (72) contacts the first copper plate (73), electromagnetic shielding connection is achieved. After the second reed (75) contacts the second copper plate (76), electromagnetic shielding connection is achieved simultaneously.

6. A method for using a two-dimensional upper-drive double-cylinder shielded wave-absorbing door, based on the two-dimensional upper-drive double-cylinder shielded wave-absorbing door according to any one of claims 1-5, characterized in that, Includes the following steps; S1: The door panel (2) is controlled by an LCD touch screen interface, making human-machine dialogue more direct. It supports password opening. The touch screen displays the instructions for use, daily maintenance, and general faults of the shielding door. The usage, maintenance, and fault information is concise and clear. At the same time, according to the user's own needs, other welcome messages, advertising materials, etc. can be entered. S2: When closing the door, the staff presses the door closing button, and the door leaf (2) moves along the horizontal track. At this time, the rotating warning light works, and before changing direction, it decelerates and moves along the arc-shaped turning track, seamlessly changing the direction of the door leaf (2) movement. It continues to move until the door is closed, then decelerates and moves forward. After the door is closed, the first cylinder (71) and the second cylinder (74) start synchronously. The first cylinder (71) pushes the first spring (72) to contact the first copper plate (73), and the second cylinder (74) pushes the second spring (75) to contact the second copper plate (76), so that the door leaf (2) and the threshold (3) are electrically connected to achieve the shielding function. At this time, the rotating warning light stops working, the "under test" sign lights up, and the entire door closing action ends. S3: When opening the door, press the door opening button. The first cylinder (71) and the second cylinder (74) close simultaneously. The first cylinder (71) drives the first spring (72) away from the first copper plate (73), and the second cylinder (74) drives the second spring (75) away from the second copper plate (76). The drive mechanism (5) drives the door leaf (2) to move after a three-second delay. At this time, the "Testing" sign goes out, the rotating warning light works, and the wave-absorbing material (6) decelerates and moves backward in front of the door frame (1) and moves along the arc-shaped turning track. The direction of movement is changed seamlessly. Before the door leaf (2) is in place, the movement is decelerated. After the door leaf (2) is in place, the rotating warning light stops working, and the entire door opening action ends. S4: The entire opening and closing action is controlled by logic and equipped with an infrared anti-pinch device. Once an illegal intrusion signal is received, the opening and closing action will stop immediately and will not resume until a new opening and closing signal is given.

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