Civil air defense door

Abstract

The invention relates to the technical field of civil defense, in particular to a civil defense door which comprises a door frame fixedly mounted on a wall and a door body rotationally mounted on the door frame. A first lock rod driving mechanism is fixedly arranged in the door body, a second lock rod driving mechanism is arranged in the door frame, and a communication channel used for movement of the locking rod is arranged between the first lock rod driving mechanism and the door frame. The first locking rod driving mechanism can drive the locking rod to move along the communicating channel so as to open or close the civil air defense door; a lock rod storage mechanism is arranged on the rear portion of the second lock rod driving mechanism, and the locking rod can be driven by the second lock rod driving mechanism to retract to the lock rod storage mechanism so that the civil defense door can be opened. Or the locking rod extends out of the locking rod storage mechanism to enter the junction of the door frame and the door body in the communication channel so as to lock the civil air defense door, so that even if the civil air defense door is impacted and a locking mechanism in the door body is damaged, the civil air defense door can still be opened through driving of the second locking rod, and normal use of the civil air defense door in an emergency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of civil defense technology, and in particular to a civil defense door. Technical Background

[0002] Civil air defense projects are a special type of underground protective building, which is generally built underground. The purpose of building civil air defense fortifications is to ensure that people's air defense command and medical rescue can be effectively carried out in wartime. Therefore, civil air defense projects are of great significance to our security.

[0003] Civil defense doors are the doors at the entrances and exits of people's defense projects. The notable features of such doors are strong disaster prevention capabilities, and they are fireproof, smokeproof, and waterproof. Common civil defense doors in civil defense projects are mostly made of thicker steel plates, but such civil defense doors are not easy to buffer external impacts. When the hardness of the door body is high, it is easy to break. When the toughness of the door body material is high, it is possible to deform the door body and bend it, making it difficult to close and open, thereby resulting in poor protection capabilities.

[0004] To solve the above problems, the Chinese utility model patent with application number 202222538452.8 announced an impact-resistant civil defense door for civil defense projects, which is characterized by: comprising a door frame, the front of the door frame is fixedly connected with two groups of symmetrical connecting blocks, each two adjacent connecting blocks are hingedly connected with a connecting plate, the front faces of the two connecting plates are fixedly connected with the door body, the left side of the door body is inserted with a buffer frame, the left inner wall of the buffer frame is fixedly connected with a first fixed plate, the right side of the first fixed plate is fixedly connected with a plurality of distributed honeycomb blocks, the right side of each honeycomb block is fixedly connected with a second fixed plate, the interior of each honeycomb block is filled with sound insulation cotton, a plurality of equidistantly arranged buffer rods are fixedly connected between the front and rear inner walls of the door body, the outer surface of each buffer rod is sleeved with two symmetrical sleeves, the outer surface of each sleeve is fixedly connected with two symmetrical buffer plates, a connecting rod is hinged between each two buffer plates, and the other end of each connecting rod is hinged to the second fixed plate. In this way, through the cooperation of the buffer rod, the first fixed plate, the honeycomb block, the sound insulation cotton and the second fixed plate, the overall impact resistance is enhanced, and the purpose of effectively reducing the sound generated by the impact is achieved. Through the cooperation of the sleeve, the buffer rod, the spring and the connecting rod, the kinetic energy generated by the impact can be absorbed, achieving the buffering effect and enhancing the impact resistance between the door body and the buffer frame.

[0005] However, the above-mentioned prior art still has the following problems: after the door body is hit, the locking mechanism inside the door body is easily damaged, and the locking rod cannot be retracted into the door body, which in turn causes the civil air defense door to be unable to be opened, affecting the normal use of the civil air defense door. Summary of the Invention

[0006] In view of this, it is necessary to provide a civil defense door so that the civil defense door can still be opened after the locking mechanism in the door body is damaged.

[0007] The present invention provides a civil air defense door, comprising a door frame fixedly mounted on a wall and a door body rotatably mounted on the door frame; a first locking rod driving mechanism is fixedly arranged inside the door body, a second locking rod driving mechanism is arranged inside the door frame, and a communication channel for movement of a locking rod is provided between the first locking rod driving mechanism and the second locking rod driving mechanism; the locking rod can be extended along the communication channel to the junction of the door frame and the door body under the drive of the first locking rod driving mechanism to achieve locking of the civil air defense door; or can be retracted from one side of the door frame to the side of the first locking rod driving mechanism in the communication channel to achieve opening of the civil air defense door; A locking rod storage mechanism is provided on the side of the second locking rod driving mechanism close to the wall. The locking rod can be retracted to the locking rod storage mechanism under the drive of the second locking rod driving mechanism to realize the opening of the civil defense door; or extend from the locking rod storage mechanism into the junction of the door frame and the door body in the connecting channel to realize the locking of the civil defense door.

[0008] Preferably, the first locking rod driving mechanism and the second locking rod driving mechanism both include a sleeve, a control assembly and a coil. The axes of the sleeve of the first locking rod driving mechanism and the sleeve of the second locking rod driving mechanism are arranged to coincide with each other to form a connecting channel. The coil is arranged on the sleeve and electrically connected to the control device, and is used to generate electromagnetic force when energized to drive the locking rod arranged in the sleeve to move along the connecting channel.

[0009] Preferably, the locking rod storage mechanism is a hollow cylindrical cavity, the opening of which is connected to the sleeve of the second locking rod driving mechanism to accommodate the locking rod. A locking rod locking mechanism is also provided at the opening for locking the locking rod to improve the stability of the civil defense door locking.

[0010] Preferably, the locking rod locking mechanism includes a locking pin, a drive assembly and a reset spring. The locking pin is axially movably installed in the drive assembly. The locking pin is extended by the drive assembly to lock the locking rod by engaging with the locking rod, or is retracted by the drive assembly to release the lock of the locking rod. One end of the reset spring is fixedly installed at the tail of the locking pin, and the other end is fixedly installed on the drive assembly. It is used to provide a bidirectional reset force for the locking pin after the drive assembly releases the driving force, so that the locking pin retracts when the locking rod is inserted, and engages with the locking rod after the locking rod moves into place to lock the locking rod.

[0011] Preferably, a conical lock tongue is provided at the front end of the locking pin, and a guide surface is provided at the end of the locking rod, which is used to force the locking pin to retreat and compress the reset spring when the locking rod is inserted. A limiting groove is provided at the rear of the guide surface, and the limiting groove is inserted after the locking rod moves into place so that the conical lock tongue engages with the limiting groove to achieve locking of the locking rod.

[0012] Preferably, the door body includes a main load-bearing frame, an energy-absorbing plate and a buffer rod. A "M"-shaped steel beam is welded inside the main load-bearing frame. The energy-absorbing plate is installed on the inner side of the main load-bearing frame, and its plate surface is parallel to the impact surface of the door body, which is used to absorb and disperse the impact energy; one end of the buffer rod is connected to the back of the energy-absorbing plate through a hinge, and the other end is connected to the steel beam of the main load-bearing frame through a hinge, which is used to absorb energy through the buffer rod when the door body is hit, so as to reduce the impact damage to the main load-bearing frame.

[0013] Preferably, a buffer pad is provided between the energy absorbing plate and the main load-bearing frame. The buffer pad is rigidly connected to the steel beam through embedded bolts, a distance is reserved between its contact surface and the energy absorbing plate, and a honeycomb groove is provided on the surface of the buffer pad.

[0014] Preferably, an emergency demolition mechanism is also provided in the door frame, including a guide frame and a traction execution assembly. The guide frame is fixedly mounted on the door frame, and a guide rail is provided on the guide frame, and its direction is parallel to the axis of the sleeve of the second locking rod driving mechanism. The locking rod storage mechanism is slidably connected to the guide rail, and the traction execution assembly is fixedly mounted on the guide frame, and its traction end is fixedly connected to the locking rod storage mechanism, which is used to drive the locking rod storage mechanism to move toward the side away from the door body through the traction execution assembly when both the first locking rod driving mechanism and the second locking rod driving mechanism fail, thereby causing the locking rod to disengage from the door body to open the civil defense door.

[0015] Preferably, an elastic sealing strip is circumferentially provided on the end surface where the main load-bearing frame contacts the door frame, and an annular sealing groove is provided on the corresponding contact surface of the door frame, so that when the door body is closed, the sealing strip is squeezed by the door frame to cause deformation, thereby being embedded in the sealing groove to form a seal, and the cross-sectional shape of the sealing groove is adapted to the compression deformation trajectory of the sealing strip.

[0016] Preferably, an annular inflatable airbag is embedded inside the sealing strip, and the annular inflatable airbag is connected to the interior of the main load-bearing frame through an air guide tube and a one-way valve. When the energy-absorbing plate is displaced by impact, the gas inside the main load-bearing frame is driven to be injected into the annular inflatable airbag through the air guide tube in one direction, so that the airbag expands to enhance the contact pressure between the sealing strip and the sealing groove.

[0017] In the above-mentioned civil defense door, it includes a door frame fixedly mounted on the wall and a door body rotatably mounted on the door frame; a first locking rod driving mechanism is fixedly arranged inside the door body, a second locking rod driving mechanism is arranged inside the door frame, and a connecting channel for the movement of the locking rod is provided between the first locking rod driving mechanism and the second locking rod driving mechanism; the locking rod can be extended along the connecting channel to the junction of the door frame and the door body under the drive of the first locking rod driving mechanism to achieve the locking of the civil defense door; or retracted from one side of the door frame to the side of the first locking rod driving mechanism of the connecting channel to achieve the opening of the civil defense door; a locking rod storage mechanism is provided on the side of the second locking rod driving mechanism close to the wall, and the locking rod can be retracted to the locking rod storage mechanism under the drive of the second locking rod driving mechanism to achieve the opening of the civil defense door; or extended from the locking rod storage mechanism into the junction of the door frame and the door body in the connecting channel to achieve the locking of the civil defense door, so that even if the civil defense door is hit and the locking mechanism inside the door body is damaged, the civil defense door can still be opened by driving the second locking rod, thereby ensuring the normal use of the civil defense door in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Axonometric drawing of a civil defense door.

[0019] Figure 2 Front view of the civil defense door.

[0020] Figure 3 Rear view of the civil defense door.

[0021] Figure 4 Schematic diagram of the internal structure of the door body.

[0022] Figure 5 Schematic diagram of the structure of the locking rod.

[0023] Figure 6 Schematic diagram of the structure of the main load-bearing frame.

[0024] Figure 7 This is a structural diagram of the door frame.

[0025] Figure 8 It is a structural diagram of the locking rod storage mechanism.

[0026] Figure 9 It is a structural diagram of the locking mechanism of the locking rod.

[0027] Figure 10 Cross-sectional view of a civil defense door.

[0028] Figure 11 Schematic diagram of the cross section of the inflatable seal.

[0029] In the figure: civil defense door 10, door body 11, first locking rod driving mechanism 111, sleeve 1111, coil 1112, locking rod 112, guide surface 1121, limit groove 1122, main load-bearing frame 113, steel beam 1131, elastic sealing strip 1132, annular inflatable airbag 11321, air guide tube 1133, one-way valve 1134, energy absorbing plate 114, buffer rod 115, buffer pad 116, door frame 12, second locking rod driving mechanism 121, locking rod storage mechanism 122, locking pin through hole 1221, mounting clip 1222, locking rod locking mechanism 123, locking pin 1231, conical lock tongue 12311, driving assembly 1232, return spring 1233, emergency demolition mechanism 124, guide frame 1241, guide rail 12411, traction execution assembly 1242, annular sealing groove 125. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Please see Figures 1 to 11 The present invention provides a civil air defense door 10, comprising a door frame 12 fixedly mounted on a wall and a door body 11 rotatably mounted on the door frame 12; a first locking rod driving mechanism 111 is fixedly arranged inside the door body 11, and a second locking rod driving mechanism 121 is arranged inside the door frame 12, and a communication channel for the movement of a locking rod 112 is provided between the first locking rod driving mechanism 111 and the second locking rod driving mechanism 121; the locking rod 112 can be extended along the communication channel to the junction of the door frame 12 and the door body 11 under the drive of the first locking rod driving mechanism 111 to achieve the locking of the civil air defense door; or can be retracted from one side of the door frame 12 to the side of the first locking rod driving mechanism 111 of the communication channel to achieve the opening of the civil air defense door; A locking rod storage mechanism 122 is provided on the side of the second locking rod driving mechanism 121 close to the wall. The locking rod 112 can be retracted to the locking rod storage mechanism 122 under the drive of the second locking rod driving mechanism 121 to realize the opening of the civil defense door; or extend from the locking rod storage mechanism 122 into the junction of the door frame 12 and the door body 11 in the connecting channel to realize the locking of the civil defense door.

[0032] In this embodiment, the civil air defense door 10 is particularly suitable for places requiring a high level of security protection, such as underground civil air defense projects, military facilities, and important material warehouses. In these places, the civil air defense door 10 not only needs to have a strong impact resistance, but also needs to be able to open quickly in an emergency to ensure the safe evacuation of personnel and the rapid transfer of materials. The civil air defense door 10 provided by the present invention can not only effectively resist extreme situations such as external explosions and collisions, and protect the safety of internal personnel and equipment, but also, when the door body 11 is hit and the first locking rod driving mechanism 111 fails, the second locking rod driving mechanism 121 drives the locking rod 112 forward so that the locking rod 112 is inserted into the locking rod storage mechanism 122 to realize the opening of the civil air defense door 10, or drives the locking rod 112 in the reverse direction so that the locking rod 112 is reset to the junction of the door frame 12 and the door body 11 to maintain the locked state. In this way, it is ensured that even if the locking mechanism in the door body 11 is damaged by an impact, the civil air defense door 10 can still be opened smoothly, thereby avoiding the safety hazards caused by the door body 11 being unable to open.

[0033] Furthermore, the first locking rod driving mechanism 111 and the second locking rod driving mechanism 121 both include a sleeve 1111, a control component and a coil 1112. The axes of the sleeve 1111 of the first locking rod driving mechanism 111 and the sleeve 1111 of the second locking rod driving mechanism 121 coincide with each other to form a connecting channel. The coil 1112 is arranged on the sleeve 1111 and is electrically connected to the control device for energizing to generate electromagnetic force to drive the locking rod 112 arranged in the sleeve 1111 to move along the connecting channel.

[0034] Furthermore, the locking rod storage mechanism 122 is a hollow cylindrical cavity, the opening of which is connected to the sleeve 1111 of the second locking rod driving mechanism 121 to accommodate the locking rod 112. A locking rod locking mechanism 123 is also provided at the opening for locking the locking rod 112 to improve the locking stability of the civil defense door 10.

[0035] In this embodiment, the first locking rod driving mechanism 111 and the second locking rod driving mechanism 121 have the same structure, both including a sleeve 1111, a control component and a coil 1112 wound on the sleeve 1111 at equal intervals. The inner diameter of the sleeve 1111 is slightly larger than the diameter of the locking rod 112. The locking rod 112 is placed in the sleeve 1111. The control component is electrically connected to the coil 1112. The control component controls the coil 1112 to be energized to generate a magnetic field, thereby driving the locking rod 112 in the sleeve 1111 to move axially. When it is necessary to achieve When the civil defense door 10 is locked, the control component controls the coil 1112 in the first locking rod driving mechanism 111 to be energized, generating a magnetic field to drive the locking rod 112 to extend forward until the locking rod 112 is inserted into the junction of the door frame 12 and the door body 11, thereby realizing the stable locking of the civil defense door 10; and when the civil defense door 10 needs to be opened, the control component controls the coil 1112 in the first locking rod driving mechanism 111 to be energized in the reverse direction, generating a reverse magnetic field, driving the locking rod 112 to retract to the junction of the door frame 12 and the door body 11, thereby realizing the opening of the civil defense door 10. The locking rod storage mechanism 122 is a cylindrical cavity with one end open and the other end closed. It is arranged behind the second locking rod driving mechanism 121. Its axis coincides with the axis of the sleeve 1111 of the second locking rod driving mechanism 121, and is used to store the locking rod 112; on one side of the opening of the locking rod storage mechanism 122, there are provided a locking pin through hole 1221 and an installation clip 1222 for fixing the locking rod locking mechanism 123.

[0036] Furthermore, the locking rod locking mechanism 123 includes a locking pin 1231, a driving assembly 1232 and a reset spring 1233. The locking pin 1231 is axially movably installed in the driving assembly 1232. The locking pin 1231 is driven out by the driving assembly 1232 to lock the locking rod 112 by engaging with the locking rod 112, or is driven to be retracted by the driving assembly 1232 to release the lock of the locking rod 112. One end of the reset spring 1233 is fixedly installed at the tail of the locking pin 1231, and the other end is fixedly installed on the driving assembly 1232, and is used to provide a bidirectional reset force for the locking pin 1231 after the driving assembly 1232 releases the driving force, so that the locking pin 1231 retracts when the locking rod 112 is inserted, and engages with the locking rod 112 after the locking rod moves into place to lock the locking rod 112.

[0037] Furthermore, a conical lock tongue 12311 is provided at the front end of the locking pin 1231, and a guide surface 1121 is provided at the end of the locking rod 112, which is used to force the locking pin 1231 to retreat and compress the return spring 1233 when the locking rod 112 is inserted. A limiting groove 1122 is provided at the rear of the guide surface 1121, and the limiting groove 1122 is inserted after the locking rod 112 moves into place so that the conical lock tongue 12311 engages with the limiting groove 1122 to achieve locking of the locking rod 112.

[0038] In this embodiment, the drive assembly 1232 is an electromagnet, within which a removable locking pin 1231 is disposed. The axis of the locking pin 1231 coincides with the axis of the electromagnet. A return spring 1233 is connected to the locking pin 1231 at one end and fixed to the drive assembly 1232 at the other end. A conical locking tongue 12311 is fixedly mounted on the other end of the locking pin 1231. The locking rod 112 is a silicon steel rod, with a guide surface 1121 at one end and an annular retaining groove 1122 disposed behind the guide surface 1121. When the electromagnet is energized, it generates a magnetic field that attracts the locking pin 1231 to move. When the electromagnet is de-energized, the return spring 1233 provides a reset force for the locking pin 1231. When the second locking rod driving mechanism 121 drives the locking rod 112 to move forward, the guide surface 1121 at the end of the locking rod 112 contacts the tapered lock tongue 12311 at the front end of the locking pin 1231, forcing the locking pin 1231 to retreat and compress the return spring 1233. When the locking rod 112 moves to the right position, the guide surface 1121 disengages from the tapered lock tongue 12311, and the return spring 1233 pushes the locking pin 1231 to reset, and the tapered lock tongue 12311 is stuck in the limiting groove 1122 of the locking rod 112, thereby locking the locking rod 112; and when the locking rod 112 needs to be unlocked, the control electromagnet is energized to attract the locking pin 1231 to retreat, thereby releasing the lock of the locking rod 112. At this time, the second locking rod driving mechanism 121 can reversely drive the locking rod 112 to reset.

[0039] Furthermore, the door body 11 includes a main load-bearing frame 113, an energy-absorbing plate 114 and a buffer rod 115. A "M"-shaped steel beam 1131 is welded inside the main load-bearing frame 113. The energy-absorbing plate 114 is installed on the inner side of the main load-bearing frame 113, and its plate surface is parallel to the impact surface of the door body 11, which is used to absorb and disperse the impact energy; one end of the buffer rod 115 is connected to the back of the energy-absorbing plate 114 through a hinge, and the other end is connected to the steel beam 1131 of the main load-bearing frame 113 through a hinge, which is used to absorb energy through the buffer rod 115 when the door body 11 is hit, so as to reduce the impact damage to the main load-bearing frame 113.

[0040] Furthermore, a buffer pad 116 is provided between the energy absorbing plate 114 and the main load-bearing frame 113. The buffer pad 116 is rigidly connected to the steel beam 1131 through embedded bolts. A spacing is reserved between its contact surface and the energy absorbing plate 114. The surface of the buffer pad 116 is provided with a honeycomb groove.

[0041] In this embodiment, the energy absorbing plate 114 adopts a honeycomb aluminum plate structure, which not only has an excellent energy absorption effect, but also is light in weight, which can significantly reduce the overall weight of the door body 11. When an impact load acts on the door body 11, the energy absorbing plate 114 first dissipates part of the kinetic energy through the layer-by-layer collapse of its honeycomb structure, and then the remaining energy is dispersed and transmitted through the buffer rod 115 hinged to the energy absorbing plate 114. The buffer rod 115 deforms, and then transmits the dispersed impact force to the steel beam 1131 of the main load-bearing frame 113, and uses the steel beam 1131 to guide the dispersed impact force to the door frame 12. In addition, the buffer pad 116 arranged between the energy absorbing plate 114 and the main load-bearing frame 113 further absorbs the impact force.

[0042] Furthermore, the steel beams 1131 of the main load-bearing frame 113 are filled with sound insulation and fireproof materials.

[0043] In this embodiment, sound insulation and fireproof materials are filled between the steel beams 1131 of the main load-bearing frame 113, which can not only improve the sound insulation effect of the door body 11 and prevent external noise from interfering with the internal environment, but also effectively prevent the spread of fire when the door body 11 is exposed to extreme situations such as fire, thereby buying precious time for the evacuation and rescue of personnel.

[0044] Furthermore, an emergency demolition mechanism 124 is also provided in the door frame 12, including a guide frame 1241 and a traction execution component 1242. The guide frame 1241 is fixedly mounted on the door frame 12, and a guide rail 12411 is provided on the guide frame 1241, and its direction is parallel to the axis of the sleeve 1111 of the second locking rod driving mechanism 121. The locking rod storage mechanism 122 is slidingly connected to the guide rail 12411, and the traction execution component 1242 is fixedly mounted on the guide frame 1241, and its traction end is fixedly connected to the locking rod storage mechanism 122. When the first locking rod driving mechanism 111 and the second locking rod driving mechanism 121 fail, the locking rod storage mechanism 122 is driven by the traction execution component 1242 to move toward the side away from the door body 11, thereby causing the locking rod 112 to disengage from the door body 11 to open the civil defense door 10.

[0045] In this embodiment, the design of the emergency demolition mechanism 124 fully considers the use requirements of the civil air defense door 10 in extreme situations. For example, after the civil air defense door 10 is hit, the first locking rod drive mechanism 111 or the second locking rod drive mechanism 121 cannot drive the locking rod 112 to move, thereby causing the civil air defense door 10 to be unable to open. The guide frame 1241 is fixedly mounted on the door frame 12 by means of embedded bolts or welding, etc., to provide support for the entire mechanism. The guide rail 12411 is a bare rod fixedly mounted between the guide frame 1241 and the door frame 12. Its axis is parallel to the axis of the second locking rod drive mechanism 121 and is used to guide the sliding of the locking rod storage mechanism 122 to ensure that the locking rod storage mechanism 122 can move smoothly along the guide rail 12411. The traction actuator 1242 is a hydraulic cylinder fixedly mounted on the guide frame 1241, and its traction end is fixedly connected to the locking rod storage mechanism 122 through a connector. When both the first locking rod driving mechanism 111 and the second locking rod driving mechanism 121 are unable to drive the locking rod 112 to move, the traction actuator 1242 is controlled to pull the locking rod storage mechanism 122 to slide along the guide rail 12411, thereby driving the locking rod 112 locked therein to move together. When the locking rod 112 moves to a certain position, it will disengage from the door body 11, thereby realizing the opening of the civil defense door 10.

[0046] Furthermore, an elastic sealing strip 1132 is circumferentially provided on the end surface where the main load-bearing frame 113 contacts the door frame 12, and an annular sealing groove 125 is provided on the corresponding contact surface of the door frame 12, so that when the door body 11 is closed, the sealing strip 1132 is squeezed by the door frame 12 to cause deformation, thereby being embedded in the sealing groove 125 to form a seal. The cross-sectional shape of the sealing groove 125 is adapted to the compression deformation trajectory of the sealing strip 1132.

[0047] In this embodiment, an elastic sealing strip 1132 is provided circumferentially on the end surface where the main load-bearing frame 113 contacts the door frame 12, and an annular sealing groove 125 is provided on the corresponding contact surface of the door frame 12, thereby ensuring that the civil air defense door 10 can form a good sealing effect when closed. When the door body 11 is closed by an external force, the sealing strip 1132 will be squeezed and deformed by the door frame 12, and then tightly embedded in the sealing groove 125. Since the cross-sectional shape of the sealing groove 125 is adapted to the compression deformation trajectory of the sealing strip 1132, it can be ensured that the sealing strip 1132 can fit tightly in the sealing groove 125 after deformation, thereby effectively preventing the ingress of external gas, liquid or solid particles, and improving the sealing performance of the civil air defense door 10.

[0048] Furthermore, an annular inflatable airbag 11321 is embedded inside the sealing strip 1132, and the annular inflatable airbag 11321 is connected to the interior of the main load-bearing frame 113 through the air guide tube 1133 and the one-way valve 1134. When the energy-absorbing plate 114 is displaced by impact, it is used to drive the gas inside the main load-bearing frame 113 to be unidirectionally injected into the annular inflatable airbag 11321 through the air guide tube 1133, so that the airbag 11321 generates expansion to enhance the contact pressure between the sealing strip 1132 and the sealing groove 125.

[0049] In this embodiment, an annular inflatable airbag 11321 is embedded inside the sealing strip 1132, further improving the sealing performance of the civil air defense door 10. When the civil air defense door 10 is hit, the energy absorbing plate 114 will be displaced, thereby squeezing the gas inside the main load-bearing frame 113. This gas will be unidirectionally injected into the annular inflatable airbag 11321 through the air guide tube 1133, causing the airbag 11321 to expand rapidly. The expanded airbag 11321 increases the contact pressure between the sealing strip 1132 and the sealing groove 125, thereby ensuring that even if the civil air defense door 10 is hit hard, the sealing strip 1132 can still fit tightly in the sealing groove 125. This not only improves the sealing performance of the civil air defense door 10, but also enhances its impact resistance.

[0050] Of course, an active inflation mechanism can also be added to the door body 11 to actively inflate the annular inflatable airbag 11321 when the civil air defense door 10 needs additional sealing performance enhancement or the gas generated by the extrusion of the energy absorbing plate 114 is insufficient, thereby further ensuring the sealing effect of the civil air defense door 10. The active inflation mechanism includes an air pump, a control component, and an air pressure detection component. The air pump is connected to the annular inflatable airbag 11321 through a pipeline. The control unit is used to control the start and stop of the air pump, and the air pressure detection component is used to detect whether the air pressure in the annular inflatable airbag 11321 meets the standard. When the air pressure detection component detects that the air pressure in the annular inflatable airbag 11321 is insufficient, the control unit will send a command to the air pump to start working, pumping gas into the annular inflatable airbag 11321 to expand it, thereby increasing the contact pressure between the sealing strip 1132 and the sealing groove 125, further enhancing the sealing performance of the civil air defense door 10.

[0051] During the implementation of the present invention, if the civil air defense door 10 is hit and the first locking rod driving mechanism 111 disposed within the door body 11 is damaged, the locking rod locking mechanism 123 is activated, the driving assembly 1232 is energized, and the locking pin 1231 is attracted to retreat, thereby releasing the lock on the locking rod 112. The second locking rod driving mechanism 121 is activated, driving the locking rod 112 forward so that it is inserted into the locking rod receiving mechanism 122, thereby achieving emergency opening of the civil air defense door 10. When both the first and second locking rod driving mechanisms are unable to drive the locking rod 112 to move, the traction actuator 1242 is activated, causing it to pull the locking rod receiving mechanism 122 to slide along the guide rail 12411, thereby driving the locking rod 112 locked therein to move together. When the locking rod 112 moves to a certain position, it will be released from the door body 11, thereby achieving the opening of the civil air defense door 10.

[0052] The modules or units in the apparatus of the embodiments of the present invention may be combined, divided, or deleted as needed. The above disclosure is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Persons skilled in the art will appreciate that any equivalent variations made by implementing all or part of the processes of the above embodiments in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A civil air defense door, characterized by: The invention comprises a door frame fixedly mounted on a wall and a door body rotatably mounted on the door frame; a first locking rod driving mechanism is fixedly arranged inside the door body, a second locking rod driving mechanism is arranged inside the door frame, and a connecting passage for movement of a locking rod is provided between the first locking rod driving mechanism and the second locking rod driving mechanism; the locking rod can be extended along the connecting passage to the junction of the door frame and the door body under the drive of the first locking rod driving mechanism to realize locking of the civil air defense door; or can be retracted from one side of the door frame to the side of the first locking rod driving mechanism of the connecting passage to realize opening of the civil air defense door; A locking rod storage mechanism is provided on the side of the second locking rod driving mechanism close to the wall. The locking rod can be retracted to the locking rod storage mechanism under the drive of the second locking rod driving mechanism to realize the opening of the civil defense door; or extend from the locking rod storage mechanism into the junction of the door frame and the door body in the connecting channel to realize the locking of the civil defense door.

2. The civil air defense door according to claim 1, characterized in that: The first locking rod driving mechanism and the second locking rod driving mechanism both include a sleeve, a control assembly and a coil. The axes of the sleeve of the first locking rod driving mechanism and the sleeve of the second locking rod driving mechanism are arranged to coincide with each other to form a connecting channel. The coil is arranged on the sleeve and electrically connected to the control device for energizing to generate electromagnetic force to drive the locking rod arranged in the sleeve to move along the connecting channel.

3. The civil air defense door according to claim 2, characterized in that: The locking rod storage mechanism is a hollow cylindrical cavity, the opening of which is connected to the sleeve of the second locking rod driving mechanism to accommodate the locking rod. A locking rod locking mechanism is also provided at the opening for locking the locking rod to improve the stability of the civil defense door locking.

4. The civil air defense door according to claim 3, characterized in that: The locking rod locking mechanism includes a locking pin, a drive assembly and a reset spring. The locking pin is axially movably installed in the drive assembly. The locking pin is extended by the drive assembly to lock the locking rod by engaging with the locking rod, or is retracted by the drive assembly to release the lock of the locking rod. One end of the reset spring is fixedly installed at the tail of the locking pin, and the other end is fixedly installed on the drive assembly. It is used to provide a bidirectional reset force for the locking pin after the drive assembly releases the driving force, so that the locking pin retracts when the locking rod is inserted, and engages with the locking rod after the locking rod moves into place to lock the locking rod.

5. The civil air defense door according to claim 4, characterized in that: A conical lock tongue is provided at the front end of the locking pin, and a guide surface is provided at the end of the locking rod, which is used to force the locking pin to retreat and compress the reset spring when the locking rod is inserted. A limiting groove is provided at the rear of the guide surface. After the locking rod moves into place, the limiting groove is inserted to enable the conical lock tongue to engage with the limiting groove, thereby locking the locking rod.

6. The civil air defense door according to claim 1, characterized in that: The door body includes a main load-bearing frame, an energy-absorbing plate and a buffer rod. A "M"-shaped steel beam is welded inside the main load-bearing frame. The energy-absorbing plate is installed on the inner side of the main load-bearing frame, and its plate surface is parallel to the impact surface of the door body, and is used to absorb and disperse the impact energy. One end of the buffer rod is connected to the back of the energy-absorbing plate through a hinge, and the other end is connected to the steel beam of the main load-bearing frame through a hinge. It is used to absorb energy through the buffer rod when the door body is hit, so as to reduce the impact damage to the main load-bearing frame.

7. The civil air defense door according to claim 6, characterized in that: A buffer pad is also provided between the energy absorbing plate and the main load-bearing frame. The buffer pad is rigidly connected to the steel beam through embedded bolts. A gap is reserved between its contact surface and the energy absorbing plate, and a honeycomb groove is provided on the surface of the buffer pad.

8. The civil air defense door according to claim 3, characterized in that: An emergency demolition mechanism is also provided in the door frame, including a guide frame and a traction execution assembly. The guide frame is fixedly mounted on the door frame, and a guide rail is provided on the guide frame, and its direction is parallel to the axis of the sleeve of the second locking rod driving mechanism. The locking rod storage mechanism is slidably connected to the guide rail, and the traction execution assembly is fixedly mounted on the guide frame, and its traction end is fixedly connected to the locking rod storage mechanism, which is used to drive the locking rod storage mechanism to move toward the side away from the door body through the traction execution assembly when both the first locking rod driving mechanism and the second locking rod driving mechanism fail, thereby causing the locking rod to disengage from the door body to open the civil defense door.

9. The civil air defense door according to claim 6, characterized in that: An elastic sealing strip is circumferentially provided on the end surface where the main load-bearing frame contacts the door frame, and an annular sealing groove is provided on the corresponding contact surface of the door frame so that the sealing strip is squeezed and deformed by the door frame when the door body is closed, thereby being embedded in the sealing groove to form a seal. The cross-sectional shape of the sealing groove is adapted to the compression deformation trajectory of the sealing strip.

10. The civil air defense door according to claim 9, characterized in that: An annular inflatable airbag is embedded inside the sealing strip, and the annular inflatable airbag is connected to the interior of the main load-bearing frame through an air guide tube and a one-way valve. When the energy-absorbing plate is displaced by impact, the gas inside the main load-bearing frame is driven to be injected into the annular inflatable airbag through the air guide tube in one direction, so that the airbag expands to enhance the contact pressure between the sealing strip and the sealing groove.

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