A kind of civil air defense door for civil air defense protection

Abstract

The present invention relates to the field of civil air defense doors, and discloses a civil air defense door for civil air defense protection, comprising a door frame and a civil air defense door body, wherein two civil air defense door bodies are installed in the door frame through a rotating structure, and a first locking structure is arranged at a front side of each civil air defense door body near the middle. When the two civil air defense door bodies are closed on the door frame, an extrusion structure is used to release the limit of a first lock plate on the first locking structure by a limiting structure, and the first lock plate can be pulled and inserted into the first lock frame of the door frame through a pulling structure, thereby greatly shortening the locking time of the two closed civil air defense door bodies and improving safety; and a second locking structure is arranged on the first lock plate and the door frame, so that after the first locking structure locks the civil air defense door body, it can automatically drive the second locking structure to perform locking work, so that the civil air defense door body arranged on the door frame is locked more firmly and the civil air defense effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of civil air defense doors, and in particular to a civil air defense door used for civil air defense protection. Background Art

[0002] Civil defense doors are the doors at the entrances and exits of people's defense projects. The classification of civil defense doors is quite distinct, including ordinary single-leaf and double-leaf protective closed doors and closed doors, movable threshold single-leaf and double-leaf protective closed doors and closed doors, and other civil defense equipment;

[0003] The existing civil air defense door can control the lock head and the flip beam at the same time by controlling the lock arm hand wheel, which is simple and convenient to operate; the setting of the slider can control and adjust the initial point of rotation of the transmission shaft of the sealing beam lifting mechanism, and it is not necessary to achieve very high precision during production, which has the effect of reducing production costs and improving the yield rate;

[0004] However, in the actual process of closing the door, it is necessary to close the civil defense door on the door frame, and then turn the locking arm handwheel to lock and secure the closed civil defense door. In this way, there will be a time difference in the process of closing and locking the civil defense door. In special circumstances, due to the preciousness of time, irreparable losses will be caused. Therefore, there is room for improvement. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a civil defense door for civil defense protection.

[0006] The present invention provides a civil air defense door for civil air defense protection, which adopts the following technical solution:

[0007] A civil air defense door for civil air defense protection comprises a door frame and a civil air defense door body, wherein two civil air defense door bodies are installed in the door frame through a rotating structure, a first locking structure is arranged near the middle of the front of each civil air defense door body, a supporting protection structure is arranged below the front of each civil air defense door body, and a second handle is arranged below the side of the front of the two civil air defense door bodies close to each other;

[0008] The first locking structure includes a first lock plate transversely arranged on the main body of the civil air defense door, the first lock plate is arranged on the main body of the civil air defense door through a pulling structure, a first groove is opened at an upper position near the middle of the front of the two main bodies of the civil air defense door, one end of the first lock plate is movably inserted into the first groove, a guide rod is connected between the groove walls at the left and right ends of the first groove, the guide rod movably passes through the first lock plate, a second locking structure is arranged between the first lock plate and the door frame, a first lock frame is movably sleeved on the other end of the first lock plate, the first lock frame is welded to the door frame, and a limiting structure is arranged in the first groove;

[0009] The limiting structure includes a slot opened in the middle of the upper groove wall of the first groove, a plug plate is movably inserted into the slot, a third spring is connected between the top of the plug plate and the upper groove wall of the slot, an extrusion plate is connected to the bottom end of the plug plate inserted into the first groove, an extrusion portion is provided at a side of the extrusion plate away from the first lock frame, and the side of the extrusion portion is in an "S" shape, a limiting rod is connected at a position near the middle of the extrusion plate, a limiting hole is provided at a position near the extrusion plate on the first lock plate, an extrusion structure is provided at a position near the first groove on the main body of the civil air defense door, and a first handle is installed on a side of the first lock plate away from the door frame;

[0010] The extrusion structure includes a second groove opened at a side surface of two civil air defense door bodies close to each other, a through plate passing through a groove wall on one side of the second groove, two cross bars are movably sleeved on the through plate below an end surface of one end of the door frame, one end of the cross bar is connected to a groove wall on one side of the first groove, a first spring is sleeved on the cross bar, two ends of the first spring are respectively connected to the through plate and a groove wall on one side of the first groove, a first extrusion wheel is installed on the end of the through plate inserted into the first groove, the first extrusion wheel is rotatably arranged under the extrusion plate, a moving plate is connected to the other end of the through plate, a fixed plate is connected to a side surface of the moving plate away from the tube through plate, and a second extrusion wheel is installed on the end of the fixed plate away from the moving plate;

[0011] A guide plate is installed on the front side edge of the second groove of the two civil air defense door main bodies, and the front side of the guide plate is an inclined surface.

[0012] Preferably, the pulling structure includes a vertical plate welded at the middle of the front side of the civil defense door body near the door frame, the first lock plate movably passes through the vertical plate, a plurality of penetrating rods pass horizontally through the vertical plate, one end of the penetrating rod is connected to the penetrating bar, the penetrating bar fixedly passes through the first lock plate, the other end of the penetrating rod is connected to an end block, each of the penetrating rods is provided with a second spring, and the two ends of the second spring are respectively connected to the penetrating bar and the vertical plate.

[0013] Preferably, the second locking structure includes a second lock plate connected to the upper and lower surfaces of the first lock plate close to the door frame, the second lock plate is in an "L" shape, a second lock frame is movably sleeved on one end of the second lock plate, and the second lock frame is welded to the door frame.

[0014] Preferably, the rotating structure includes rotating rods arranged on the left and right sides of the door frame, and the two civil defense door bodies are respectively fixedly mounted on the two rotating rods, and bearings are fixedly mounted on the upper and lower ends of each rotating rod, and the bearings are fixedly installed on the door frame, and a sealing edge is installed on the inner edge of the door frame, and the two civil defense door bodies are both pressed against the sealing edge.

[0015] Preferably, the supporting and protective structure includes an extension plate connected to the middle part of the bottom of each civil defense door body, an opening for the extension plate to pass through is opened at the bottom of the door frame, two fixed frames are welded between the extension plate and the front of the civil defense door body, the top of the fixed frame movably passes through the inner plate, the bottom end of the inner plate is rotatably connected to a curved plate, a first rotating shaft is fixedly passed through the bottom end of the inner walls on both sides of the fixed frame, a support plate is movably sleeved on the first rotating shaft, the bottom end of the curved plate is rotatably connected to one end of the support plate, expansion structures are provided on both side surfaces of the support plate, and a driving structure is provided on the extension plate.

[0016] Preferably, the driving structure includes a mounting plate welded to the extension plate between the two fixed frames, a hydraulic cylinder is installed on the top of the mounting plate, the top end of the hydraulic cylinder output shaft is connected to a lifting plate, and both ends of the lifting plate are respectively connected to the top ends of the two inner plates.

[0017] The top end of the second gear is fixedly provided with a toothed sleeve which is fixedly provided with a toothed sleeve, and the bottom end of the second gear is connected with a toothed sleeve having a toothed sleeve and a toothed sleeve arranged on the top end of the second gear.

[0018] In summary, the present invention includes the following beneficial technical effects:

[0019] The present invention provides a first locking structure, a pressing structure, a limiting structure and a pulling structure on the civil air defense door body and the door frame, so that when the two civil air defense door bodies are closed on the door frame, the limiting structure of the first lock plate on the first locking structure is released by the pressing structure, and the first lock plate can be pulled and inserted into the first lock frame of the door frame by the pulling structure, which greatly shortens the locking time of the two closed civil air defense door bodies and has higher safety; and a second locking structure is provided on the first lock plate and the door frame, so that after the first locking structure locks the civil air defense door body, the second locking structure can automatically drive the second locking structure to perform locking work, so that the civil air defense door body provided on the door frame is locked more firmly and the civil air defense effect is better;

[0020] The present invention provides a supporting and protective structure, a driving structure and an expansion structure on the main body of the civil air defense door. After the two main bodies of the civil air defense door are closed, the driving structure can be started to drive the support plate on the supporting and protective structure to rotate and support it to the ground, so as to increase the impact resistance of the civil air defense door. When the support plate is turned down for support and protection or turned up for folding and storage, it can automatically drive the support bar on the expansion structure to rotate out or rotate into the third groove. When the support bar is rotated out, the support and protection range of the main body of the civil air defense door can be increased, and the protection effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a civil air defense door used for civil air defense protection in an embodiment of the present invention;

[0022] Figure 2 In the embodiment of the present invention Figure 1 A magnified view of the structure at A;

[0023] Figure 3 is a schematic structural diagram of a door frame in an embodiment of the present invention;

[0024] Figure 4 In the embodiment of the present invention Figure 3 A magnified view of the structure at B;

[0025] Figure 5 It is a structural schematic diagram of a civil air defense door in an embodiment of the present invention;

[0026] Figure 6 In the embodiment of the present invention Figure 5 A magnified view of the structure at C;

[0027] Figure 7 is a structural schematic diagram of a supporting protective structure in an embodiment of the present invention;

[0028] Figure 8 In the embodiment of the present invention Figure 7 A magnified view of the structure at D;

[0029] Fig. 9 is a schematic diagram of the structure in a fixed frame in an embodiment of the present invention;

[0030] Fig.10 In the embodiment of the present invention Fig. 9 Enlarged view of the structure at E.

[0031] Description of reference numerals: 1, door frame; 2, civil air defense door body; 3, first lock plate; 4, first lock frame; 5, first groove; 6, first handle; 7, guide rod; 8, extrusion plate; 9, plug plate; 10, slot; 11, extrusion part; 12, through plate; 13, first extrusion wheel; 14, cross bar; 15, first spring; 16, moving plate; 17, second groove; 18, guide plate; 19, second extrusion wheel; 20, fixed plate; 21, second handle; 22, vertical plate; 23, through rod; 24, second spring; 25 , through strip; 26, end block; 27, second lock plate; 28, second lock frame; 29, sealing edge; 30, rotating rod; 31, bearing; 32, extension plate; 33, fixed frame; 34, inner plate; 35, curved plate; 36, support plate; 37, first rotating shaft; 38, mounting plate; 39, hydraulic cylinder; 40, lifting plate; 41, limiting rod; 42, third groove; 43, gear; 44, support strip; 45, through groove; 46, driving plate; 47, fourth groove; 48, fixed rod; 49, arc groove; 50, guide groove. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-Figure 10 The present invention is described in further detail.

[0033] The embodiment of the present invention discloses a civil air defense door for civil air defense protection, comprising a door frame 1 and a civil air defense door body 2, wherein two civil air defense door bodies 2 are installed in the door frame 1 through a rotating structure, a first locking structure is provided at a position near the middle of the front face of each civil air defense door body 2, a supporting protection structure is provided at the lower part of the front face of each civil air defense door body 2, and a second handle 21 is installed at the lower part of the side of the front face of the two civil air defense door bodies 2 close to each other;

[0034] The first locking structure includes a first lock plate 3 arranged transversely on the civil air defense door body 2, the first lock plate 3 is arranged on the civil air defense door body 2 through a pulling structure, a first groove 5 is provided at an upper position near the middle of the front of the two civil air defense door bodies 2, one end of the first lock plate 3 is movably inserted into the first groove 5, a guide rod 7 is connected between the groove walls at the left and right ends of the first groove 5, the guide rod 7 movably passes through the first lock plate 3, a second locking structure is arranged between the first lock plate 3 and the door frame 1, a first lock frame 4 is movably sleeved on the other end of the first lock plate 3, the first lock frame 4 is welded to the door frame 1, and a limiting structure is arranged in the first groove 5;

[0035] The limiting structure includes a slot 10 opened in the middle of the upper groove wall of the first groove 5, a plug plate 9 is movably inserted into the slot 10, a third spring is connected between the top of the plug plate 9 and the upper groove wall of the slot 10, an extrusion plate 8 is connected to the bottom end of the plug plate 9 inserted into the first groove 5, an extrusion portion 11 is provided at a side of the extrusion plate 8 away from the first lock frame 4, and the side of the extrusion portion 11 is in an "S" shape, a limiting rod 41 is connected to a position near the middle of the extrusion plate 8, a limiting hole is provided on the first lock plate 3 near the extrusion plate 8, an extrusion structure is provided at a position near the first groove 5 on the civil air defense door body 2, and a first handle 6 is installed on the first lock plate 3 at a side away from the door frame 1;

[0036] The extrusion structure includes a second groove 17 opened at a side of the two civil air defense door bodies 2 close to each other, a through plate 12 passes through one side groove wall of the second groove 17, two cross bars 14 are movably sleeved at the lower part of the through plate 12 near one end surface of the door frame 1, one end of the cross bar 14 is connected to one side groove wall of the first groove 5, a first spring 15 is sleeved on the cross bar 14, the two ends of the first spring 15 are respectively connected to the through plate 12 and one side groove wall of the first groove 5, a first extrusion wheel 13 is installed on the end of the through plate 12 inserted into the first groove 5, the first extrusion wheel 13 is rotatably arranged under the extrusion plate 8, a movable plate 16 is connected to the other end of the through plate 12, a fixed plate 20 is connected to the side surface of the movable plate 16 away from the tube through plate 12, and a second extrusion wheel 19 is installed on the end of the fixed plate 20 away from the movable plate 16;

[0037] A guide plate 18 is installed on the front edge of one side of the second groove 17 of the two civil air defense door main bodies 2, and the front of the guide plate 18 is an inclined surface; the pulling structure includes a vertical plate 22 welded on the middle of the front of the civil air defense door main body 2 near the door frame 1, and the first lock plate 3 movably passes through the vertical plate 22, and a plurality of through rods 23 are horizontally passed through the vertical plate 22, and one end of the through rod 23 is connected to the through bar 25, and the through bar 25 is fixedly passed through the first lock plate 3, and the other end of the through rod 23 is connected to an end block 26, and each through rod 23 is sleeved with a second spring 24, and the two ends of the second spring 24 are respectively connected to the through bar 25 and the vertical plate 22. In the process of rotating the two civil air defense door main bodies 2 on the door frame 1 to close, the second extrusion wheel 1 on the fixed plate 20 in the second groove 17 on the civil air defense door main body 2 9 rolls from the guide plate 18 to the second groove 17. When the second extrusion wheel 19 is on the groove wall on one side of the second groove 17, the extrusion pushes the movable plate 16 to drive the first extrusion wheel 13 at one end of the through plate 12 to roll on the extrusion portion 11 of the extrusion plate 8, so as to push the extrusion plate 8 to drive the plug plate 9 to move up in the slot 10, compress the third spring, and the upward movement of the extrusion plate 8 is pulled out from the limiting hole on the first lock plate 3 toward the bottom end of the limiting rod 41, and the limit on the first lock plate 3 is released on the civil defense door body 2, and with the elastic force of the second spring 24, when the civil defense door body 2 is closed, the through strip 25 is pushed to drive one end of the first lock plate 3 to be inserted into the first lock frame 4 on the door frame 1, so that the civil defense door body 2 is locked in time, and the safety protection is more timely.

[0038] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 The second locking structure includes a second lock plate 27 connected to the upper and lower surfaces of the first lock plate 3 near the door frame 1. The second lock plate 27 is in an "L" shape. A second lock frame 28 is movably sleeved on one end of the second lock plate 27. The second lock frame 28 is welded to the door frame 1. When the first lock plate 3 is moved and inserted into the first lock frame 4, one end of the second lock plate 27 is driven to be inserted into the second lock frame 28 of the door frame 1, so that the main body 2 of the civil air defense door is locked more firmly on the door frame 1.

[0039] The rotating structure includes a rotating rod 30 arranged on the left and right sides of the door frame 1. The two civil defense door bodies 2 are respectively fixedly mounted on the two rotating rods 30. Bearings 31 are fixedly mounted on the upper and lower ends of each rotating rod 30. The bearings 31 are fixedly mounted on the door frame 1. A sealing edge 29 is installed on the inner edge of the door frame 1. The two civil defense door bodies 2 are both tightly pressed against the sealing edge 29. When the rotating rod 30 is rotated as the axis, the civil defense door body 2 can be opened or closed. Under the action of the bearing 31, opening or closing the civil defense door body 2 on the door frame 1 is more labor-saving and convenient.

[0040] See also Figure 1, Figure 6 , Figure 7 , Figure 8 and Fig. 9 The supporting and protective structure includes an extension plate 32 connected to the middle of the bottom of each civil air defense door body 2. An opening for the extension plate 32 to pass through is opened at the bottom of the door frame 1. Two fixed frames 33 are welded to the front of the extension plate 32 and the front of the civil air defense door body 2. The upper part of the fixed frame 33 movably passes through the inner plate 34. The bottom end of the inner plate 34 is rotatably connected with a curved plate 35. The bottom ends of the inner walls on both sides of the fixed frame 33 are fixedly passed through a first rotating shaft 37. A supporting plate 36 is movably sleeved on the first rotating shaft 37. The bottom end of the curved plate 35 is rotatably connected to one end of the supporting plate 36. Expansion structures are arranged on both sides of the supporting plate 36. A driving structure is provided; the driving structure includes a mounting plate 38 welded to the extension plate 32 between the two fixed frames 33, a hydraulic cylinder 39 is installed on the top of the mounting plate 38, the top end of the output shaft of the hydraulic cylinder 39 is connected to a lifting plate 40, and the two ends of the lifting plate 40 are respectively connected to the top ends of the two inner plates 34; the expansion structure includes a third groove 42 opened at the lower part of the left and right sides of the support plate 36, the rear end position of the groove wall on the third groove 42 is rotatably connected to the second rotating shaft, the top end of the second rotating shaft is fixedly sleeved with a gear 43, the bottom end of the second rotating shaft is connected to a support bar 44, the bottom of the support bar 44 is connected to the bottom of the support plate 36 The surfaces are on the same horizontal plane, and a fourth groove 47 is provided at the rear end position of the left and right sides of the support plate 36. The fourth groove 47 is connected to the third groove 42 through a through groove 45. A driving plate 46 is movably passed through the through groove 45. The driving plate 46 is provided with teeth meshing with the gear 43. A fixing rod 48 is connected to one end of the driving plate 46 inserted into the fourth groove 47. Arc grooves 49 are provided at the lower part of both sides of the fixed frame 33. The axis of the arc groove 49 is at the same position as the axis of the first rotating shaft 37. A guide groove 50 is provided on the groove wall at one end of the arc groove 49. The fixing rod 48 movably passes through the guide groove 50. After closing the main body 2 of the civil defense door, the hydraulic cylinder 39 on the mounting plate 38 can be started to drive the lifting plate 40 and the inner plate 34 to move downward as a whole. The support plate 36 is pushed to rotate on the first rotating shaft 37 through the curved plate 35. The support plate 36 is supported on the ground to increase the impact resistance of the civil defense door. While the support plate 36 is rotating downward, it drives the fixing rod 48 to slide from the arc groove 49 to the guide groove 50. The sliding of the fixing rod 48 in the guide groove 50 drives the driving plate 46 to move in the through groove 45. Through the gear 43, the support bar 44 is driven to rotate out of the third groove 42, thereby increasing the support range and improving the stability of protection.

[0041] The implementation principle of a human-defense door for human-defense protection in an embodiment of the present invention is as follows: when the human-defense door body 2 is closed on the door frame 1 for safety protection, first, the rotating rod 30 and the human-defense door body 2 are rotated in the bearing 31. During the process of the two human-defense door bodies 2 rotating toward the middle and closing, the second extrusion wheel 19 at one end of the fixed plate 20 rolls from the guide plate 18 to the second groove 17. The second extrusion wheel 19 rolls on the groove wall of the second groove 17 to push the movable plate 16 to move in the second groove 17, thereby driving the first extrusion wheel 13 at one end of the through plate 12 to roll on the extrusion portion 11 of the extrusion plate 8. The extrusion portion 11 is extruded by the first extrusion wheel 13 to push the extrusion plate 8 to move upward in the first groove 5, driving the bottom end of the limiting rod 41 to be withdrawn from the limiting hole on the first lock plate 3, and releasing the limiting of the first lock plate 3 on the human-defense door body 2. Then, under the elastic force of the second spring 24, the through bar 25 is pushed while the human-defense door body 2 is closed. The first locking plate 3 is driven to insert one end of the first locking plate 3 into the first locking frame 4 on the door frame 1, so that the civil air defense door body 2 is locked in time, and the safety protection is more timely. The movement of the first locking plate 3 will drive one end of the second locking plate 27 to be inserted into the second locking frame 28 of the door frame 1, so that the civil air defense door body 2 is locked more firmly in the door frame 1. After locking the civil air defense door body 2, the hydraulic cylinder 39 on the mounting plate 38 is started to drive the lifting plate 40 and the inner plate 34 to move downward as a whole, and the supporting plate 36 is pushed to rotate on the first rotating shaft 37 through the curved plate 35, and the supporting plate 36 is supported to the ground to increase the impact resistance of the civil air defense door. When the supporting plate 36 rotates down, it drives the fixing rod 48 to slide from the arc groove 49 to the guide groove 50, and the sliding of the fixing rod 48 in the guide groove 50 is used to drive the driving plate 46 to move in the through groove 45, and through the gear 43, the support bar 44 is driven to rotate out of the third groove 42, thereby increasing the support range and achieving better safety protection effect.

[0042] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A civil air defense door for civil air defense protection, comprising a door frame (1) and a civil air defense door body (2), characterized in that: The two civil air defense door bodies (2) are installed in the door frame (1) via a rotating structure, a first locking structure is provided at a position close to the middle of the front face of each civil air defense door body (2), a supporting protection structure is provided at the lower part of the front face of each civil air defense door body (2), and a second handle (21) is provided at the lower part of the side close to each other on the front faces of the two civil air defense door bodies (2); The first locking structure comprises a first lock plate (3) which is transversely arranged on the civil air defense door body (2); the first lock plate (3) is arranged on the civil air defense door body (2) through a pulling structure; a first groove (5) is provided at an upper position near the middle of the front of the two civil air defense door bodies (2); one end of the first lock plate (3) is movably inserted into the first groove (5); a guide rod (7) is connected between the groove walls at the left and right ends of the first groove (5); the guide rod (7) movably passes through the first lock plate (3); a second locking structure is arranged between the first lock plate (3) and the door frame (1); a first lock frame (4) is movably sleeved on the other end of the first lock plate (3); the first lock frame (4) is welded to the door frame (1); a limiting structure is arranged in the first groove (5); The limiting structure comprises a slot (10) provided in the middle of the upper groove wall of the first groove (5), a plug plate (9) is movably inserted into the slot (10), a third spring is connected between the top of the plug plate (9) and the upper groove wall of the slot (10), an extrusion plate (8) is connected to the bottom end of the plug plate (9) inserted into the first groove (5), an extrusion portion (11) is provided below the extrusion plate (8) at a side away from the first lock frame (4), the side of the extrusion portion (11) is in an "S" shape, a limiting rod (41) is connected to a position near the middle below the extrusion plate (8), a limiting hole is provided on the first lock plate (3) at a position near the extrusion plate (8), an extrusion structure is provided on the civil air defense door body (2) at a position near the first groove (5), and a first handle (6) is installed on the first lock plate (3) at a side away from the door frame (1); The extrusion structure comprises a second groove (17) provided at a side surface of two civil air defense door bodies (2) close to each other, a through plate (12) passing through a groove wall on one side of the second groove (17), two cross bars (14) movably sleeved below an end surface of the through plate (12) close to one end of the door frame (1), one end of the cross bar (14) being connected to a groove wall on one side of the first groove (5), a first spring (15) sleeved on the cross bar (14), and two ends of the first spring (15) being respectively connected to the through plate ( 12) and a groove wall on one side of the first groove (5); a first extrusion wheel (13) is installed on one end of the through plate (12) inserted into the first groove (5); the first extrusion wheel (13) is rotatably arranged below the extrusion plate (8); a movable plate (16) is connected to the other end of the through plate (12); a fixed plate (20) is connected to a side surface of the movable plate (16) away from the tube through plate (12); and a second extrusion wheel (19) is installed on one end of the fixed plate (20) away from the movable plate (16); A guide plate (18) is installed on the front side of the two civil air defense door bodies (2) at one side edge of the second groove (17), and the front side of the guide plate (18) is an inclined surface; The pulling structure comprises a vertical plate (22) welded to the middle of the front side of the civil air defense door body (2) near the door frame (1); the first locking plate (3) movably passes through the vertical plate (22); a plurality of through rods (23) are horizontally passed through the vertical plate (22); one end of the through rod (23) is connected to a through bar (25); the through bar (25) is fixedly passed through the first locking plate (3); the other end of the through rod (23) is connected to an end block (26); each of the through rods (23) is sleeved with a second spring (24); the two ends of the second spring (24) are respectively connected to the through bar (25) and the vertical plate (22); The second locking structure comprises a second locking plate (27) connected to the upper and lower surfaces of the first locking plate (3) at positions close to the door frame (1); the second locking plate (27) is in an "L" shape; a second locking frame (28) is movably sleeved on one end of the second locking plate (27); the second locking frame (28) is welded to the door frame (1); The supporting and protective structure comprises an extension plate (32) connected to the middle of the bottom of each civil air defense door body (2); an opening for the extension plate (32) to pass through is provided at the bottom of the door frame (1); two fixed frames (33) are welded between the extension plate (32) and the front of the civil air defense door body (2); the top of the fixed frame (33) movably passes through an inner plate (34); the bottom end of the inner plate (34) is rotatably connected to a curved plate (35); a first rotating shaft (37) is fixedly passed through the bottom ends of the inner walls on both sides of the fixed frame (33); a support plate (36) is movably sleeved on the first rotating shaft (37); the bottom end of the curved plate (35) is rotatably connected to one end of the support plate (36); expansion structures are provided on both side surfaces of the support plate (36); and a driving structure is provided on the extension plate (32).

2. The civil air defense door for civil air defense protection according to claim 1, characterized in that: The rotating structure comprises rotating rods (30) arranged at left and right sides of the door frame (1); the two civil air defense door bodies (2) are respectively fixedly sleeved on the two rotating rods (30); the upper and lower ends of each rotating rod (30) are fixedly sleeved with bearings (31); the bearings (31) are fixedly mounted on the door frame (1); a sealing edge (29) is installed on the inner edge of the door frame (1); and the two civil air defense door bodies (2) are both tightly pressed against the sealing edge (29).

3. The civil air defense door for civil air defense according to claim 1, characterized in that: The driving structure comprises a mounting plate (38) welded to the extension plate (32) between the two fixed frames (33); a hydraulic cylinder (39) is mounted on the top of the mounting plate (38); the top end of the output shaft of the hydraulic cylinder (39) is connected to a lifting plate (40); and both ends of the lifting plate (40) are respectively connected to the top ends of the two inner plates (34).

4. The civil air defense door for civil air defense protection according to claim 1, characterized in that: The expansion structure comprises a third groove (42) formed at the lower part of the left and right side surfaces of the support plate (36); a second rotating shaft is rotatably connected at the rear end position of the groove wall of the third groove (42); a gear (43) is fixedly sleeved on the top end of the second rotating shaft; a support bar (44) is connected to the bottom end of the second rotating shaft; the lower part of the support bar (44) is on the same horizontal plane as the lower part of the support plate (36); a fourth groove (47) is formed at the rear end position of the left and right side surfaces of the support plate (36); a through groove is formed between the fourth groove (47) and the third groove (42); (45) is connected, a driving plate (46) is movably passed through the through groove (45), and teeth are arranged on the driving plate (46) to mesh with the gear (43), and a fixing rod (48) is connected to one end of the driving plate (46) inserted into the fourth groove (47), and an arc groove (49) is provided at the lower part of both side surfaces of the fixing frame (33), and the axis of the arc groove (49) is at the same position as the axis of the first rotating shaft (37), and a guide groove (50) is provided on the groove wall at one end of the arc groove (49), and the fixing rod (48) movably passes through the guide groove (50).

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