Protective closure door and method of controlling the same

Abstract

The application discloses a protective closed door and a control method thereof. The protective closed door comprises a door leaf hinged to a wall body, a driving mechanism installed on the wall body, a locking support mechanism arranged on the door leaf, a detection device interlocked between the driving device and the driving mechanism, a first locking component and a movable beam at the bottom of the door leaf synchronously driven by the driving device through a transmission assembly. When the driving mechanism drives the door leaf to close, the driving device drives the first locking component to extend and be inserted into the second locking component on the wall body, and drives the movable beam to extend and be pressed into the sealing baffle on the wall body. When the driving device drives the first locking component and the movable beam to retract, the driving mechanism drives the door leaf to open. The protective closed door is used at the entrance of a protective project, and can realize electric and manual operations. The locking support mechanism can realize the functions of door leaf locking, anti-rebound, door sill support and bottom sealing simultaneously.

Description

Technical Field

[0001] This invention relates to the field of protective door technology, and in particular to a protective airtight door and its control method. Background Technology

[0002] Protective airtight doors are used in key protective engineering projects to resist blast shock waves and isolate harmful gases. Currently, the requirements for the protective capabilities of mouth protection equipment in protective engineering are becoming increasingly stringent, with higher demands for automation. To meet the development needs of protective engineering under the new circumstances, protective airtight doors are required to withstand large impacts, high-frequency vibrations, and maintain airtightness, while also possessing electric and automated opening and closing capabilities. After closing, they need effective locking and support to achieve: tight fixation between the door leaf and the door frame, resistance to the rebound force of the protective equipment under blast impact, and ensuring the airtightness between the door leaf and the door frame.

[0003] Most current protective airtight doors are manually operated. Although a few are electrically operated, the drive system is easily damaged by external impacts because the drive unit is located on the door. The impact resistance is not strong. The locking device often has a large starting torque, poor vibration resistance, and a relatively limited range of applications. Although it has some applicability, it is difficult to meet new requirements.

[0004] For example, the Chinese invention patent CN109610986B, published on June 9, 2020, discloses an actuator and control method for a dual-use (manual and electric) safety door. This device is used to manually or electrically control the opening and closing of the safety door. The actuator is mounted on the safety door and includes a drive wheel, a locking device, a motor, and a transmission device. The drive wheel is located at the bottom of the door leaf and is connected to the motor via the transmission device. However, the actuator uses a single motor, and the electric drive system is located inside the door body, making it susceptible to adverse effects from external impacts, resulting in poor reliability. The drive wheel is easily damaged and inconvenient to maintain. Furthermore, the locking device lacks impact resistance measures, making it prone to damage and failure under impact.

[0005] For example, the interlocking device for air-raid shelter doors disclosed in Chinese Utility Model Patent No. CN216949943U, with an authorization announcement date of July 12, 2022, includes a door frame. A door panel is hinged to the door frame, and a first gear is located on one side of the front surface of the door panel. A second gear is located on one side of the first gear. The first gear is rotatably connected to the second gear via a chain. Push plates are located on both sides of the second gear on the front surface of the door panel. This interlocking device for air-raid shelter doors can achieve a secure lock and the locking rod is not easily damaged by vibration, but its resistance to rebound is limited, and it cannot be electrically started.

[0006] For example, a Chinese utility model patent with an authorization announcement date of December 21, 2018, and authorization announcement number CN 208267685 U discloses an electric protective airtight door, comprising: a door frame installed at a door opening, the door frame having a latch hole; a door leaf rotatably installed on one side of the door frame; a locking mechanism installed on the door leaf; a transmission mechanism connected to the locking mechanism; and a drive mechanism connected to the transmission mechanism. The aforementioned electric protective airtight door drives the transmission mechanism to rotate via the drive mechanism, thereby causing the locking mechanism to insert into or move out of the latch hole, thus achieving a locked or unlocked state of the door leaf and the door frame. In the unlocked state, the transmission mechanism can also rotate to drive the door leaf to rotate around its rotatable side, thereby opening or closing the protective airtight door. However, it has the following shortcomings: First, the door leaf, locking mechanism and transmission mechanism are all located on the air defense door, which cannot avoid the adverse effects of external impact on the electric drive system, resulting in poor reliability; second, it has a single function and cannot simultaneously achieve the effects of door leaf locking, anti-rebound, threshold support and bottom sealing.

[0007] In addition, existing protective airtight doors mostly use fixed thresholds or movable thresholds. Fixed thresholds are inconvenient for personnel and goods to pass through and are prone to accidents in emergencies. Movable thresholds require manual placement by staff, which is labor-intensive, has low conversion efficiency, and is unreliable in sealing.

[0008] Therefore, it is necessary to design an electrically controlled protective airtight door that is simple in structure, easy to control, occupies little space, has excellent seismic performance, and is easy to pass through.

[0009] It should be noted that the above technical information is intended only to enhance the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any way implying that the above technical information constitutes prior art known to those skilled in the art. Summary of the Invention

[0010] To address the shortcomings in the aforementioned background technology, this invention proposes a protective airtight door and its control method, which solves the technical problems of low automation, poor impact and rebound resistance, and unreliable bottom sealing in existing protective airtight doors.

[0011] The technical solution of this application is as follows:

[0012] A protective airtight door, in use, includes a door leaf hinged to a wall, the door leaf being connected to a drive mechanism mounted on the wall, and a locking support mechanism provided on the door leaf. The drive device in the locking support mechanism is interlocked with the drive mechanism via a detection device. The drive device synchronously drives a first locking component and a movable beam located at the bottom of the door leaf through a transmission assembly. When the drive mechanism closes the door leaf, the drive device extends the first locking component to engage with a second locking component on the wall, and extends the movable beam to engage with a sealing baffle on the wall. When the drive device retracts the first locking component and the movable beam, the drive mechanism opens the door leaf.

[0013] Furthermore, the door leaf is hinged to the wall via a door frame, and the door frame includes the locking hole seat and the second locking component.

[0014] Furthermore, the sealing baffle is L-shaped, and the inner side of the movable beam is in sliding fit with the door leaf, the outer side is in sliding fit with the vertical surface of the sealing baffle, and the bottom side is in pressing fit with the transverse surface of the sealing baffle.

[0015] The vertical surface is an inclined surface with its bottom end close to the door leaf and its top end far from the door leaf, and the outer surface is an inclined surface that matches the vertical surface.

[0016] Furthermore, a first sealing element, a second sealing element, and a third sealing element are respectively provided between the door frame and the door leaf, between the inner side and the door leaf, and between the bottom side and the transverse side. The first sealing element and the second sealing element are connected end to end to form a ring around the door opening.

[0017] Furthermore, the drive mechanism includes a linear actuator for mounting on a wall, the extension shaft of the linear actuator being hinged to the door leaf via a linkage assembly, and the detection device includes a first sensor and a second sensor disposed on the extension path of the linear actuator.

[0018] Furthermore, the linkage assembly includes a first link with one end hinged to the extension shaft, the other end of the first link hinged to one corner of a triangular second link, the other two corners of the second link hinged to the wall and one end of a third link, respectively, and the other end of the third link hinged to the door leaf.

[0019] Furthermore, the wall is connected to a slide rail, and the end of the protruding shaft is connected to a slider that slides with the slide rail. The protruding shaft is hinged to one end of the first connecting rod through the slider.

[0020] Furthermore, the driving device is a rotary driving device, which is sequentially connected to at least two transmission shafts via a first reversing device. Each transmission shaft is connected to a second reversing device, and each second reversing device is connected to at least one linear motion device. Some of the linear motion devices are connected to the first locking component, and some of the linear motion devices are connected to the movable beam. The detection device includes a third sensor and a fourth sensor disposed on the extension path of the linear motion device.

[0021] Furthermore, the door leaf is provided with a guide seat, and the output end of the linear motion device connected to the movable beam is connected to the movable beam through a telescopic shaft. The telescopic shaft is slidably inserted into the guide seat, and the telescopic shaft is movably connected to the elongated hole provided on the movable beam through a pin.

[0022] Furthermore, the second reversing device connecting the movable beam is connected via a drive shaft to two symmetrically arranged linear motion devices that are connected to the movable beam via the telescopic shaft.

[0023] Furthermore, the door leaf is provided with a locking seat, the first locking component is a locking head that is slidably inserted into the locking seat, and the second locking component is a locking hole seat that cooperates with the locking head; or the first locking component is a hole seat that is slidably inserted into the locking seat, and the second locking component is a lock head that cooperates with the hole seat.

[0024] Furthermore, the second reversing device connected to the first locking component is connected via a drive shaft to a plurality of linear motion devices arranged at intervals and connected to the first locking component.

[0025] Furthermore, there are two second reversing devices connected to the first locking component, which are symmetrically arranged on both sides of the door leaf; or there are three second reversing devices connected to the first locking component, wherein two second reversing devices are symmetrically arranged on both sides of the door leaf, and the other second reversing device is arranged at the upper end of the door leaf.

[0026] Furthermore, a buffer device is provided between the wall and the drive mechanism and / or between the door leaf and the drive device.

[0027] Furthermore, the drive device is provided with two manual input terminals, each connected to a detachable handwheel located on the inner and outer sides of the door leaf.

[0028] A method for controlling a protective airtight door, using the protective airtight door described in any of the above technical solutions, includes an electric closing mode and an electric opening mode;

[0029] The electric shut-off mode includes the following steps:

[0030] When the locking support mechanism is determined to be in the fully retracted state, the control system receives a closing signal. The control system activates the drive mechanism, energizes the linear actuator to drive the motor to rotate forward, and the linear actuator pulls the linkage assembly to move, which in turn drives the door to rotate and close. When the detection device detects that the linear actuator has extended to its full position, the detection signal is fed back to the control system, the drive mechanism stops moving and locks, and the door is now closed. The control system then activates the drive mechanism of the locking support mechanism to rotate forward. The drive mechanism converts rotation into movement through the transmission assembly, pushing the first locking component and the second locking component to engage. Simultaneously, it pushes the movable beam downward, which gradually moves closer to and presses against the door and sealing baffle. When the detection device detects that the first locking component or the movable beam has extended to its full position, the detection signal is fed back to the control system, the forward rotation of the locking support mechanism stops and self-locks, and the door is now locked, with the movable beam support and seal in place.

[0031] The electric opening mode includes the following steps:

[0032] The control system receives an opening signal; the control system activates the drive device of the locking support mechanism to reverse, the drive device converts rotation into movement through the transmission component, pulling the first locking component to disengage from the second locking component, and simultaneously pulling the movable beam upward, the movable beam gradually disengaging from the door leaf and sealing baffle; when the detection device detects that the first locking component or the movable beam has retracted into place, the detection signal is fed back to the control system, the reverse movement of the locking support mechanism stops and self-locks, at this time the door leaf is unlocked and the movable beam is retracted into place; the control system activates the drive mechanism, the linear actuator is energized and drives the motor to reverse, the linear actuator pushes the linkage assembly to move, the linkage assembly drives the door leaf to rotate and open; when the detection device detects that the linear actuator has retracted into place, the detection signal is fed back to the control system, the drive mechanism stops moving and locks, at this time the door leaf is fully opened.

[0033] Furthermore, the protective airtight door control method also includes a manual control mode. The drive device is connected to an emergency manual device, which includes a detachable handwheel connected to the manual input terminal of the drive device. When the electrical control system malfunctions or loses power, the emergency manual device is used to manually control the handwheels on the inner and / or outer sides of the door leaf to open and close the locking support mechanism.

[0034] Compared with existing technologies, the protective airtight door and its control method provided by this invention solve the technical problems of low automation, poor impact and rebound resistance, and unreliable bottom sealing of existing protective airtight doors. When the protective airtight door is used at the entrance of a protective engineering project, it can be operated electrically and manually; the main components of the drive mechanism are arranged separately from the door leaf; the locking support mechanism can simultaneously realize functions such as door leaf locking, anti-rebound, threshold support, and bottom sealing.

[0035] The present invention has the following beneficial effects:

[0036] (1) The protective airtight door disclosed in this invention can be controlled by both manual and electric. Under normal circumstances, it is electrically controlled and equipped with a sensor to realize automatic control of opening and closing. It is convenient to operate and safe. In case of emergency, it can be manually operated, which is convenient and highly controllable.

[0037] (2) The drive mechanism in the protective airtight door disclosed in this invention adopts a multi-link mechanism and is installed inside the door opening. It separates the drive from the door leaf, has a simple structure, and is less affected by high vibration conditions, thus improving the wartime impact resistance and reliability.

[0038] (3) The linear motion device of the locking support mechanism in the protective airtight door disclosed in this invention has self-locking capability and can simultaneously provide effective locking force to the locking heads on the left and right sides of the door leaf and the movable beam at the bottom, preventing backward movement and ensuring high reliability.

[0039] (4) The movable beam at the bottom of the protective airtight door disclosed in this invention adopts an oblique motion design, and the side and bottom sealing strips can be pressed at the same time to achieve effective sealing of the bottom of the thresholdless door leaf. The movable beam can also serve as a movable threshold to resist impact and improve the protective performance of the equipment.

[0040] (5) The locking support mechanism in the protective airtight door disclosed in this invention has no redundant linkage mechanism, the movement is smooth, the cumulative error is small, which is conducive to improving the transmission accuracy.

[0041] (6) The protective airtight door disclosed in this invention adds a buffer device between the actuator and the door leaf / door frame, which increases the impact resistance of the protective equipment. Attached Figure Description

[0042] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A diagram illustrating the closed state of a protective airtight door;

[0044] Figure 2 for Figure 1 The front view;

[0045] Figure 3 A diagram illustrating the open state of a protective airtight door;

[0046] Figure 4 This is a schematic diagram of the locking support mechanism;

[0047] Figure 5 This is a schematic diagram of a partial structure at the locking head;

[0048] Figure 6 This is a partial structural diagram of the movable beam.

[0049] Figure 7 This is a schematic diagram of the emergency manual device;

[0050] Figure 8 A schematic diagram of the sealing structure at the handwheel drive shaft;

[0051] Figure 9 This is a schematic diagram showing the locking head in the extended position.

[0052] Figure 10 This is a schematic diagram of the movable beam in its extended state.

[0053] Explanation of icon numbers:

[0054] 1-Wall, 2-Door frame, 3-Door leaf, 4-Rotating assembly, 5-Drive mechanism, 6-Locking support mechanism, 7-Emergency manual device, 8-Sealing device, 9-Detection device, 10-Control system, 11-Buffer device;

[0055] 201-Locking hole seat, 202-Sealing baffle 202;

[0056] 501-Linear actuator, 502-Slide rail, 503-Slider, 504-First link, 505-Second link, 506-Third link, 507-First support, 508-Second support;

[0057] 601-Drive device, 602-First reversing device, 603-Drive shaft, 604-Second reversing device, 605-Linear motion device, 606-Locking seat, 607-Locking head, 608-Guide seat, 609-Telescopic shaft, 6010-Moving beam, 60101-Beam body, 60102-Ear seat, 6011-Pin;

[0058] 701-Handwheel, 702-Shaft, 703-Sleeve;

[0059] 801 - First sealing strip, 802 - Second sealing strip, 803 - Third sealing strip, 804 - Sealing ring;

[0060] 901 - First sensor, 902 - Second sensor, 903 - Third sensor, 904 - Fourth sensor. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] A type of protective airtight door, such as Figure 1 , Figure 3 , Figure 4 As shown, in use, the door leaf 3 is hinged to the wall 1. The door leaf 3 can be directly hinged to the wall 1 or hinged to the wall 1 through the door frame 2, as long as the door leaf 3 can be rotated to open and close. At the same time, a corresponding sealing structure is provided between the wall 1 and the door leaf 3 or between the door leaf 3 and the door frame 2. If it is used in an environment where sealing is not required, then the corresponding sealing structure is not required.

[0063] The door leaf 3 is connected to the drive mechanism 5 mounted on the wall 1. That is, the drive component of the drive mechanism 5 is located on the wall 1, or it can be located on the door frame 2. The purpose is to separate the drive component from the door leaf 3, thereby reducing the weight of the door leaf 3 while improving its impact resistance. The drive component of the drive mechanism 5 is connected to the door leaf 3 through a transmission component. The transmission component can have various implementations, such as a rigid linkage assembly or a flexible rope assembly, as long as it can drive the door leaf 3 to rotate relative to the wall 1.

[0064] The door leaf 3 is equipped with a locking support mechanism 6. The drive device 601 in the locking support mechanism 6 is interlocked with the drive mechanism 5 through a detection device 9. That is, the detection device 9 detects the operating status of the drive mechanism 5 and feeds it back to the locking support mechanism 6 through the control system 10. By detecting the operating status of the locking support mechanism 6 and feeding it back to the drive mechanism 5 through the control system 10, the interlocking control between the drive mechanism 5 and the locking support mechanism 6 is achieved. Preferably, the control system 10 is installed on the wall 1.

[0065] The drive device 601 synchronously drives the first locking component and the movable beam 6010 located at the bottom of the door leaf 3 via a transmission assembly. When the drive mechanism 5 closes the door leaf 3, the drive device 601 drives the first locking component to extend and engage with the second locking component on the wall 1, and drives the movable beam 6010 to extend and engage with the sealing baffle 202 on the wall 1. When the drive device 601 retracts the first locking component and the movable beam 6010, the drive mechanism 5 opens the door leaf 3.

[0066] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 3 and Figure 5 As shown, the door leaf 3 is hinged to the wall 1 via the door frame 2, and the door frame 2 includes the sealing baffle 202 and / or the second locking component.

[0067] The sealing baffle 202 and / or the second locking component are mounted on the wall 1 via the door frame 2. Preferably, a hinge shaft is provided on one side of the door leaf 3, and a rotating assembly 2 connected to the hinge shaft is provided on the door frame 2. If a sealing structure is required between the door leaf 3 and the door frame 2, a sealing strip is preferably provided on the door frame 2 or the door leaf 3, or corresponding sealing strips are provided on the door frame 2 and the door leaf 3. Preferably, the control system 10 is mounted on the wall 1 via the door frame 2.

[0068] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 1 , Figure 3 , Figure 6 and Figure 10 As shown, the sealing baffle 202 is L-shaped. The inner side of the movable beam 6010 is in sliding fit with the door leaf 3, the outer side is in sliding fit with the vertical surface of the sealing baffle 202, and the bottom side is in pressing fit with the transverse surface of the sealing baffle 202.

[0069] The design incorporates a sealing baffle 202 and a door leaf 3 that engages with the movable beam 6010. As the movable beam 6010 moves, reliable support and a seal are formed between the bottom of the door leaf 3 and the ground. The sealing baffle 202 is L-shaped to position and support the movable beam 6010. The sealing baffle 202 can have various structural options, such as an integrated structure where the horizontal surface is embedded in the ground, preferably flush with it, while the vertical surface is only positioned on both sides of the doorway to avoid obstructing passage. Alternatively, the sealing baffle 202 can be a split structure, preferably comprising two L-shaped plates symmetrically positioned on both sides of the doorway.

[0070] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 6 and Figure 10 As shown, a inclined structure that tends to compress is provided between the movable beam 6010 and the door leaf 3 and / or between the movable beam 6010 and the sealing baffle 202.

[0071] The inclined structure preferably adopts a vertical surface with the bottom end close to the door leaf 3 and the top end away from the door leaf 3, and the outer surface is an inclined surface that matches the vertical surface. That is, a mutually cooperating inclined surface is provided between the movable beam 6010 and the sealing baffle 202, which can gradually press the door leaf 3 and the sealing baffle 202 together as the movable beam 6010 moves downward, which not only achieves a guiding function, but also further improves the pressing and sealing effect. Of course, a mutually cooperating inclined surface can also be provided at the part where the door leaf 3 and the movable beam 6010 are in contact, and a pressing inclined surface structure can also be provided between the door leaf 3 and the movable beam 6010, and between the sealing baffle 202 and the movable beam 6010. All of these can gradually press the door leaf 3 and the sealing baffle 202 together as the movable beam 6010 moves downward.

[0072] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 2 , Figure 6 , Figure 10 As shown, a first sealing element, a second sealing element, and a third sealing element are respectively provided between the door frame 2 and the door leaf 3, between the inner side and the door leaf 3, and between the bottom side and the horizontal side. The first sealing element and the second sealing element are connected end to end to form a ring around the door opening.

[0073] The first sealing element can be installed on the door frame 2, the door leaf 3, or both the door frame 2 and the door leaf 3. The second and third sealing elements can be installed on the door leaf 3, or both on the movable beam 6010, or respectively on the door leaf 3 and the movable beam 6010, or simultaneously on both the door leaf 3 and the movable beam 6010. Preferably, the first, second, and third sealing elements are respectively a first sealing strip 801, a second sealing strip 802, and a third sealing strip 803, and each sealing strip can be either affixed to the installation position or embedded in the installation position.

[0074] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 1 , Figure 3 As shown, the drive mechanism 5 includes a linear actuator 501 for mounting on the wall 1. The extension shaft of the linear actuator 501 is hinged to the door leaf 3 via a connecting rod assembly. The detection device 9 includes a first sensor 901 and a second sensor 902 disposed on the extension path of the linear actuator 501.

[0075] The drive mechanism 5 uses a linear actuator 501 as its power source. The extension and retraction of the linear actuator 501 drives the linkage assembly, thereby opening and closing the door leaf 3. A first sensor 901 and a second sensor 902, positioned along the extension path of the linear actuator 501, can detect displacement. These sensors can be either proximity switches or distance sensors. Preferably, the first sensor 901 and the second sensor 902 are positioned at the extension shaft of the linear actuator 501. By corresponding the first sensor 901 and the second sensor 902 to different positions on the extension shaft, the operating status of the linear actuator 501 can be easily detected.

[0076] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 1 , Figure 3 As shown, the linkage assembly includes a first link 504 with one end hinged to the extension shaft, the other end of the first link 504 hinged to one corner of a triangular second link 505, the other two corners of the second link 505 hinged to the wall 1 and one end of a third link 506 respectively, and the other end of the third link 506 hinged to the door leaf 3.

[0077] One end of the first link 504 is rotatably connected to the extension shaft of the linear actuator 501, and the other end is hinged to one end of the second link 505. The second link 505 is triangular, with its middle end hinged to the first support 507. The first support 507 is fixed to the wall 1 as a support point. The other end of the second link 505 is rotatably connected to one end of the third link 506. The other end of the third link 506 is hinged to the second support 508. The second support 508 is fixed to the top of the inner side of the door leaf 3.

[0078] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 1 , Figure 3 As shown, the wall 1 is connected to a slide rail 502, and the end of the extension shaft of the linear actuator 501 is connected to a slider 503 that slides with the slide rail 502. The extension shaft is hinged to one end of the first connecting rod 504 through the slider 503.

[0079] Specifically, a slider 503 connected to the extension shaft of the linear actuator 501 is added. The slider 503 is slidably engaged with the slide rail 502 and hinged to the first connecting rod, thereby enhancing the impact resistance and rebound resistance of the linear actuator 501. Preferably, the linear actuator 501 can be a lift, an electric push rod, or a hydraulic cylinder, etc. The body of the linear actuator 501 is fixed to the top of the door shaft side of the door opening in the wall 1, and the end of the extension shaft is hinged to the slider 503.

[0080] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figures 1 to 4 As shown, the driving device 601 is a rotary driving device. The rotary driving device is connected to at least two transmission shafts 603 in sequence through a first reversing device 602. Each transmission shaft 603 is connected to a second reversing device 604. Each second reversing device 604 is connected to at least one linear motion device 605. Some of the linear motion devices 605 are connected to the first locking component, and some of the linear motion devices 605 are connected to the movable beam 6010. The detection device 9 includes a third sensor 903 and a fourth sensor 904 disposed on the extension path of the linear motion device 605.

[0081] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 2 , Figure 4 As shown, the door leaf 3 is provided with a guide seat 608. The output end of the linear motion device 605 connected to the movable beam 6010 is connected to the movable beam 6010 through a telescopic shaft 609. The telescopic shaft 609 is slidably inserted into the guide seat 608. The telescopic shaft 609 is movably connected to the elongated hole provided on the movable beam 6010 through a pin 6011.

[0082] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 2 , Figure 4 As shown, the second reversing device 604 connecting the movable beam 6010 is connected via a transmission shaft 603 to two symmetrically arranged linear motion devices 605 that are connected to the movable beam 6010 via the telescopic shaft 609.

[0083] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 2 , Figure 4 As shown, the door leaf 3 is provided with a locking seat 606, the first locking component is a locking head 607 that is slidably inserted into the locking seat 606, and the second locking component is a locking hole seat 201 that cooperates with the locking head 607; or the first locking component is a hole seat that is slidably inserted into the locking seat 606, and the second locking component is a lock head that cooperates with the hole seat.

[0084] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 2 , Figure 4 As shown, the second reversing device 604 connected to the first locking component is connected via a drive shaft 603 to a plurality of linear motion devices 605 arranged at intervals and connected to the first locking component.

[0085] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 2 , Figure 4 As shown, there are two second reversing devices 604 connected to the first locking component, which are symmetrically arranged on both sides of the door leaf 3; or there are three second reversing devices 604 connected to the first locking component, wherein two second reversing devices 604 are symmetrically arranged on both sides of the door leaf 3, and the other second reversing device 604 is arranged at the upper end of the door leaf 3.

[0086] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 2 As shown, a buffer device 11 is provided between the wall 1 and the drive mechanism 5 and / or between the door leaf 3 and the drive device 601. That is, for doors with high impact resistance, a buffer device 11 can be provided between the wall 1 and the linear actuator 501, and between the door leaf 3 and the drive device 601, to improve the impact resistance of the mechanism.

[0087] Based on the above embodiments, this embodiment provides a preferred implementation of the protective airtight door, such as... Figure 1 , Figure 2 , Figure 7 As shown, the drive device 601 is equipped with two manual input terminals, each connected to a detachable handwheel 701 located on the inner and outer sides of the door leaf 3. Specifically, the drive device 601 has input terminals symmetrically arranged front and rear, with handwheels 701 detachably connected to the inner and outer sides of the door leaf 3. The inner handwheel can be directly connected to the drive device 601, while the outer handwheel is connected to the drive device 601 via a rotating shaft 702. The rotating shaft 702 is rotatably connected within a sleeve 703, which is fixed inside the door leaf 3. In an emergency, the locking support mechanism can be manually operated from both the inner and outer sides of the door leaf 3.

[0088] A protective airtight door that can be operated manually or electrically, has a reliable bottom seal, strong impact and rebound resistance, high opening and closing efficiency, convenient operation and maintenance, and facilitates passage.

[0089] like Figures 1 to 10 As shown, it includes:

[0090] Door frame 2: Fixed to the opening of wall 1, with locking hole seats 201 arranged on the left and right sides for contacting and cooperating with locking head 607 to provide locking pre-tightening force. Sealing baffles 202 with inclined surfaces are arranged at both ends of the bottom, preferably L-shaped baffles, for contacting the movable beam 6010 to provide support force as a threshold. Another function is to press and loosen the second sealing strip 802.

[0091] Door leaf 3: A hinge shaft is provided at one end, which is rotatably connected to the door frame 2 through the rotating assembly 4;

[0092] Drive mechanism 5: is a multi-link mechanism, located at the top of the opening of wall 1, used to realize the opening and closing of door leaf 3, including: linear actuator 501: can be a lift, electric push rod, hydraulic cylinder, etc., the body is fixed at the top of the door shaft side of the opening of wall 1, the end of the extended shaft is hinged to slider 503, slider 503 is placed in slide rail 502 and movably connected to it, slide rail 502 is fixed at the top of the opening of wall 1, one end of the first link 504 is rotatably connected to slider 503, the other end is hinged to one end of second link 505, the second link 505 is triangular, the middle end is hinged to first support 507, the first support 507 is fixed to wall 1 as a support point, the other end is rotatably connected to one end of third link 506, the other end of third link 506 is hinged to second support 508, the second support 508 is fixed at the top of the inner side of door leaf 3;

[0093] Locking support mechanism 6: The entire assembly is located inside the door leaf 3, used to lock the door leaf 3 and support and seal the bottom of the door leaf 3. It includes: a drive unit 601: providing the power source for the entire mechanism, typically a motor reducer, capable of electric control; and a first reversing device 602: fixed to the door leaf 3, realizing the reversing and diversion of motion. The input shaft is connected to the drive unit 601, and there are three output shafts, each connected to the input end of the second reversing device 604 via a transmission shaft 603, transmitting torque to the left, right, and bottom sides. Second reversing device 604; Second reversing device 604: Fixed on the door leaf 3, realizing torque reversal and splitting. The output shafts on both sides are rotatably connected to the input end of the linear motion device 605 through the transmission shaft 603, transmitting torque to the linear motion device 605; Linear motion device 605: Fixed on the door leaf 3, which can convert rotational input into linear movement output, generally an elevator or worm gear box, and can realize self-locking; Locking seat 606: Fixed on both sides inside the door leaf 3, serving as a guide for the locking head 607. The door leaf 3 is locked by means of a guide seat 607, which is slidably connected to the inner wall of the locking seat 606, with one end hinged to the output end of the linear motion device 605 and the other end in contact with the locking hole seat 201; the door leaf 3 is fixed to the lower inside of the door leaf 3 and serves as a guide and reaction fulcrum for the telescopic shaft 609; the telescopic shaft 609 is slidably connected to the inner wall of the guide seat 608, with one end hinged to the output end of the linear motion device 605 and the other end having a pin hole, which is connected to the movable shaft 6011 via a pin. The movable beam 6010 is hinged; the movable beam 6010 is placed at the bottom inside the door leaf. The top of the beam 60101 is provided with an ear seat 60102. The cross section of the beam 60101 is a right trapezoid, and the side facing away from the door leaf is an inclined surface. When the door leaf 3 is closed, it contacts and connects with the L-shaped baffle 202. The ear seat 60102 is provided with an elongated hole, which allows the movable beam 6010 to move towards the door leaf side while being pressed down, so that the second sealing strip 802 is gradually pressed tight. When it moves up, it gradually moves away from the door leaf, so that the second sealing strip 802 is gradually relaxed.

[0094] Emergency manual device 7: Input ends are symmetrically arranged before and after the drive device 601. Handwheels 701 are detachably connected to the inside and outside of the door leaf 3 respectively. The inner handwheel can be directly connected to the drive device 601, and the outer handwheel is connected to the drive device 601 through the rotating shaft 702. The rotating shaft 702 is rotatably connected to the sleeve 703. The sleeve 703 is fixed inside the door leaf 3. In an emergency, the locking support mechanism can be manually operated from the inside and outside of the door leaf 3.

[0095] Sealing device 8 includes a first sealing strip 801, a second sealing strip 802, a third sealing strip 803, and a sealing ring 804. The first sealing strip 801 is in the shape of a door and is fixed between the door leaf 3 and the door frame 2. The second sealing strip 802 is fixed to the inner side of the movable beam 6010 and can move with the movable beam. The third sealing strip 803 is fixed to the bottom surface of the movable beam 6010 and can move up and down with the movable beam. When the door leaf 3 is closed, the first sealing strip 801 and the second sealing strip 802 form a complete closed loop. The third sealing strip 803 is in contact with the ground to achieve a seal between the door leaf 3 and the door frame 2. The sealing ring 804 is arranged between the rotating shaft 702 and the sleeve 703.

[0096] Detection device 9: used to detect the motion state of drive mechanism 5 and locking support mechanism 6, and realize action positioning control. A first sensor 901 and a second sensor 902 are set near the linear actuator 501 for detecting the door leaf 3 opening and closing position. A third sensor 903 and a fourth sensor 904 are set near the locking head 607 for detecting the locking head 607 extending and retracting position.

[0097] Control system 10: Used to realize the electric control of the door leaf;

[0098] Buffer device 11: For doors with high impact resistance, a buffer device 11 can be installed between the wall 1 and the linear actuator 501, and between the door leaf 3 and the drive device 601 to improve the impact resistance of the mechanism.

[0099] In addition, this implementation also has different implementation methods:

[0100] 1. The locking support device can be arranged asymmetrically as needed, and the commutator can also be fixed in a non-central position.

[0101] 2. It can also be applied to protective doors that do not require airtightness; simply remove the movable beam at the bottom.

[0102] 3. The drive mechanism can be used independently or in conjunction with other types of locking mechanisms.

[0103] A method for controlling a protective airtight door, employing the protective airtight door described in any of the above technical solutions, such as... Figures 1 to 10 As shown, it includes an electric closing mode and an electric opening mode;

[0104] The electric shut-off mode includes the following steps:

[0105] When the locking support mechanism 6 is determined to be in the fully retracted state, the control system 10 receives a closing signal. The control system 10 activates the drive mechanism 5, energizes the linear actuator 501 to drive the motor to rotate forward, and the linear actuator 501 pulls the linkage assembly to move, which in turn drives the door leaf 3 to rotate and close. When the detection device 9 detects that the linear actuator 501 has extended to the correct position, the detection signal is fed back to the control system 10, the drive mechanism 5 stops moving and locks, and the door leaf 3 is closed. The control system 10 activates the drive device 601 of the locking support mechanism 6 to rotate forward. The drive device 601 converts rotation into movement through the transmission assembly, pushing the first locking component and the second locking component to engage. At the same time, it pushes the movable beam 6010 downward, and the movable beam 6010 gradually moves closer to the door leaf 3 and the sealing baffle 202 and gradually presses them together. When the detection device 9 detects that the first locking component or the movable beam 6010 has extended to the correct position, the detection signal is fed back to the control system 10, the forward rotation of the locking support mechanism 6 stops and self-locks, and the door leaf 3 is locked, and the movable beam 6010 supports and seals the door.

[0106] The electric opening mode includes the following steps:

[0107] The control system 10 receives an opening signal; the control system 10 activates the drive device 601 of the locking support mechanism 6 to reverse, the drive device 601 converts rotation into movement through the transmission component, pulling the first locking component to disengage from the second locking component, and simultaneously pulling the movable beam 6010 upward, the movable beam 6010 gradually disengages from the door leaf 3 and the sealing baffle 202; when the detection device 9 detects that the first locking component or the movable beam 6010 has been retracted into place, the detection signal is fed back to the control system 10, the reverse movement of the locking support mechanism 6 stops and self-locks, at this time the door leaf 3 is unlocked into place, and the movable beam 6010 is retracted into place; the control system 10 activates the drive mechanism 5, the linear actuator 501 is energized and drives the motor to reverse, the linear actuator 501 pushes the linkage assembly to move, the linkage assembly drives the door leaf 3 to rotate and open; when the detection device 9 detects that the linear actuator 501 has retracted into place, the detection signal is fed back to the control system 10, the drive mechanism 5 stops moving and locks, at this time the door leaf 3 is opened into place.

[0108] Based on the above embodiments, as a preferred embodiment of the protective airtight door control method, a manual control mode is also included. The drive device 601 is connected to an emergency manual device 7. The emergency manual device 7 includes a detachable handwheel 701 connected to the manual input end of the drive device 601. When the electrical control system malfunctions or loses power, the emergency manual device 7 is used to manually control the handwheel 701 on the inner and / or outer sides of the door leaf 3 to realize the opening and closing of the locking support mechanism 6.

[0109] A method for controlling a protective airtight door, such as Figures 1 to 10 As shown, it includes electric control mode (primary) and manual control mode (secondary).

[0110] Electric closing mode:

[0111] 1. When it is determined that the locking support mechanism 6 is in the fully retracted state, the control system 10 receives a closing signal;

[0112] 2. Start the drive mechanism 5, the linear actuator 501 is energized and drives the motor to run, the output shaft retracts and drives the slider 503 to move, and drives the second link 505 to rotate around the first support 507 through the first link 504, and then transmits the power to the door leaf 3 through the third link 506 to realize the closing rotation of the door leaf 3;

[0113] 3. When the slider 503 moves to the position of the second sensor 902, the second sensor 902 detects a signal, feeds back to the control system 10, the drive mechanism 5 stops moving and locks, and the door 3 closes in place;

[0114] 4. The control system 10 starts the drive device 601 of the locking support mechanism 6 to operate. The drive torque is diverted to the three second reversing devices 604 on both sides and the bottom through the first reversing device 602, and then the power is distributed to each linear motion device 605. The linear motion device 605 converts rotation into movement, directly pushing the locking head 607 connected to it into the locking hole seat 201. At the same time, it pushes the telescopic shaft 609 to extend, thereby driving the movable beam 6010 to move down. Under the action of the elongated hole of the ear seat 60102 and the L-shaped baffle 202, the movable beam 6010 gradually moves closer to the door leaf 3, and the second sealing strip 802 and the third sealing strip 803 are gradually pressed together.

[0115] 5. When the third sensor 903 detects the signal, the feedback control system 10 and the locking support mechanism 6 stop moving and self-lock. At this time, the door leaf 3 is locked in place, the left and right sides of the door leaf 2 can provide locking force, the inner and outer sides and bottom of the movable beam 6010 are pressed, the bottom side of the door leaf 3 is supported in place, which is equivalent to a movable threshold and can resist impact force. The sealing device 8 is pressed in place to achieve a complete seal of the thresholdless door leaf.

[0116] Electric opening mode:

[0117] 1. The control system 10 receives an activation signal;

[0118] 2. The drive device 601 of the locking support mechanism 6 is reversed. The transmission route is the same as the extension process of the locking support mechanism 6. The locking head 607 connected to it is pulled out from the locking hole seat 201 through the linear motion device 605. At the same time, the telescopic shaft 609 is pulled back, which in turn drives the movable beam 6010 to move upward. Under the action of the elongated hole of the ear seat 60102 and the L-shaped baffle 202, the movable beam 6010 gradually moves away from the door leaf 3, and the second sealing strip 802 and the third sealing strip 803 gradually relax.

[0119] 3. When the fourth sensor 904 detects the signal, the feedback control system 10 and the locking support mechanism 6 stop their reverse motion and self-lock. At this time, the door leaf 3 is locked and retracted into place, and the movable beam 6010 moves upward into place.

[0120] 4. Start the drive mechanism 5. The linear actuator 501 is energized and drives the motor to reverse. The output shaft retracts and drives the slider 503 to move. Through the first connecting rod 504, the second connecting rod 505 rotates around the first support 505. Then, through the third connecting rod 506, the power is transmitted to the door leaf 3 to realize the opening and rotation of the door leaf 3.

[0121] 5. When the slider 503 moves to the position of the first sensor 901, the first sensor 901 detects a signal, feeds back to the control system 10, the drive mechanism 5 stops reversing and locks, and the door 3 opens to the position.

[0122] In the event of an abnormal power outage or other special operating conditions, an emergency manual device 7 can be used to manually control the handwheels 701 on the inner and outer sides of the door leaf to open and close the locking support mechanism 6.

[0123] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0124] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A security door comprising, in the state of use, a door leaf (3) hinged to a wall (1), characterized in that: The door leaf (3) is connected with a driving mechanism (5) installed on the wall body (1), a locking support mechanism (6) is arranged on the door leaf (3), a driving device (601) in the locking support mechanism (6) is interlocked and controlled between the driving mechanism (5) through a detection device (9), and the driving device (601) synchronously drives a first locking part and a movable beam (6010) located at the bottom of the door leaf (3) through a transmission assembly; When the driving mechanism (5) drives the door leaf (3) to be closed, the driving device (601) drives the first locking part to extend and be inserted and matched with the second locking part on the wall body (1), and drives the movable beam (6010) to extend and be pressed and matched with the sealing baffle (202) on the wall body (1); when the driving device (601) drives the first locking part and the movable beam (6010) to be retracted, the driving mechanism (5) drives the door leaf (3) to be opened; The sealing baffle (202) is L-shaped, the inner side surface of the movable beam (6010) is slidably matched with the door leaf (3), the outer side surface is slidably matched with the vertical surface of the sealing baffle (202), and the bottom side surface is pressed and matched with the horizontal surface of the sealing baffle (202); A slope structure that tends to be pressed is arranged between the movable beam (6010) and the door leaf (3) and / or between the movable beam (6010) and the sealing baffle (202); The driving mechanism (5) comprises a linear execution device (501) for being installed on the wall body (1), an extension shaft of the linear execution device (501) is hinged with the door leaf (3) through a connecting rod assembly, and the detection device (9) comprises a first sensor (901) and a second sensor (902) arranged on the extension path of the linear execution device (501); The connecting rod assembly comprises a first connecting rod (504) hinged with one end of the extension shaft, the other end of the first connecting rod (504) is hinged with one corner of a triangular second connecting rod (505), the other two corners of the second connecting rod (505) are respectively hinged with the wall body (1) and one end of a third connecting rod (506), and the other end of the third connecting rod (506) is hinged with the door leaf (3); The wall body (1) is connected with a sliding rail (502), the end of the extension shaft is connected with a sliding block (503) slidably matched with the sliding rail (502), and the extension shaft is hinged with one end of the first connecting rod (504) through the sliding block (503); The driving device (601) is a rotary driving device, at least two transmission shafts (603) are sequentially connected with the rotary driving device through a first reversing device (602), each transmission shaft (603) is connected with a second reversing device (604), and each second reversing device (604) is connected with at least one linear motion device (605), part of the linear motion devices (605) are connected with the first locking part, and part of the linear motion devices (605) are connected with the movable beam (6010); the detection device (9) comprises a third sensor (903) and a fourth sensor (904) arranged on the extension path of the linear motion device (605).

2. The security door according to claim 1, wherein: The door leaf (3) is hinged with the wall body (1) through a door frame (2), and the door frame (2) comprises the sealing baffle (202) and / or the second locking part.

3. The security door according to claim 2, wherein: The first seal, the second seal and the third seal are arranged between the door frame (2) and the door leaf (3), between the inner side and the door leaf (3), and between the bottom side and the transverse side respectively, and the first seal and the second seal are sequentially connected in a head-tail manner to form a ring around the door opening.

4. The security door according to claim 3, wherein: The door leaf (3) is provided with a guide seat (608), and an output end of a linear motion device (605) connected to the movable beam (6010) is connected to the movable beam (6010) through a telescopic shaft (609), the telescopic shaft (609) is slidably inserted into the guide seat (608), and the telescopic shaft (609) is movably connected to the long circular hole arranged on the movable beam (6010) through a pin shaft (6011).

5. The security door according to claim 4, wherein: The second reversing device (604) connected to the movable beam (6010) is connected to two symmetrical linear motion devices (605) through a transmission shaft (603), and the linear motion devices (605) are connected to the movable beam (6010) through the telescopic shaft (609).

6. A security door as claimed in claim 4 or 5 wherein: The door leaf (3) is provided with a locking seat (606), the first locking component is a locking head (607) slidably inserted into the locking seat (606), and the second locking component is a locking hole seat (201) matched with the locking head (607); or the first locking component is a hole seat slidably inserted into the locking seat (606), and the second locking component is a lock head matched with the hole seat.

7. A security door as claimed in claim 6 wherein: The second reversing device (604) connected to the first locking component is connected to a plurality of linear motion devices (605) arranged at intervals and connected to the first locking component through a transmission shaft (603).

8. The security door according to claim 7, wherein: The second reversing device (604) connected to the first locking component is provided with two and symmetrically arranged on both sides of the door leaf (3); or the second reversing device (604) connected to the first locking component is provided with three, two of which are symmetrically arranged on both sides of the door leaf (3), and the other is arranged at the upper end of the door leaf (3).

9. A security door as claimed in claim 8 wherein: The wall (1) and the driving mechanism (5) and / or the door leaf (3) and the driving device (601) are provided with a buffer device (11).

10. A security door as claimed in any one of claims 1 to 5, 7 to 9, wherein: The driving device (601) is provided with two manual input ends, and the two manual input ends are respectively connected with detachable hand wheels (701) located on the inner and outer sides of the door leaf (3).

11. A method of controlling a security door comprising: The protective closed door of any one of claims 1-10 comprises an electric closing mode and an electric opening mode; The electric closing mode comprises the following steps: When the locking support mechanism (6) is in a fully retracted state, the control system (10) obtains a closing signal; The control system (10) starts the driving mechanism (5), the linear actuator (501) is powered to drive the motor to rotate in a positive direction, the linear actuator (501) pulls the connecting rod assembly to move, and the connecting rod assembly drives the door leaf (3) to rotate to close; When the detection device (9) detects that the linear actuator (501) is extended to the position, a detection signal is fed back to the control system (10), the driving mechanism (5) stops moving and is locked, and at this time the door leaf (3) is closed to the position; The control system (10) starts the driving device (601) of the locking support mechanism (6) to rotate forward, the driving device (601) converts the rotation into movement through the transmission assembly, pushes the first locking part and the second locking part to insert and fit, and at the same time pushes the movable beam (6010) to move downward, the movable beam (6010) gradually moves close to and is gradually pressed against the door leaf (3) and the sealing baffle (202); When the detection device (9) detects that the first locking part or the movable beam (6010) is extended to the position, a detection signal is fed back to the control system (10), the locking support mechanism (6) stops rotating forward and is self-locked, at this time, the door leaf (3) is locked to the position, and the movable beam (6010) is supported and sealed to the position; The electric opening mode includes the following steps: The control system (10) obtains an opening signal; The control system (10) starts the driving device (601) of the locking support mechanism (6) to rotate reversely, the driving device (601) converts the rotation into movement through the transmission assembly, pulls the first locking part and the second locking part to separate, and at the same time pulls the movable beam (6010) to move upward, the movable beam (6010) gradually separates from the door leaf (3) and the sealing baffle (202); When the detection device (9) detects that the first locking part or the movable beam (6010) is retracted to the position, a detection signal is fed back to the control system (10), the locking support mechanism (6) stops rotating reversely and is self-locked, at this time, the door leaf (3) is unlocked to the position, and the movable beam (6010) is retracted to the position; The control system (10) starts the driving mechanism (5), the linear execution device (501) is powered to drive the motor to rotate reversely, the linear execution device (501) pushes the connecting rod assembly to move, the connecting rod assembly drives the door leaf (3) to rotate and open; When the detection device (9) detects that the linear execution device (501) is retracted to the position, a detection signal is fed back to the control system (10), the driving mechanism (5) stops moving and is locked, at this time, the door leaf (3) is opened to the position.

12. The protected access door control method of claim 11, wherein: The manual control mode is further included, the driving device (601) is connected with an emergency manual device (7), the emergency manual device (7) includes a detachable hand wheel (701) connected with a manual input end of the driving device (601), when an electric control system is abnormal or is powered off, the emergency manual device (7) is used, a hand wheel (701) on the inner side and / or the outer side of the door leaf (3) is used to control the locking support mechanism (6) to be opened and closed.

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