CN114016877A

CN114016877A - Civil air defense engineering door

Info

Publication number: CN114016877A
Application number: CN202111390333.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Guangxi Nanning Civil Air Defence Equipment Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-02-08
Anticipated expiration: 2041-11-23
Also published as: CN114016877B

Abstract

The application relates to the technical field of civil air defense engineering, and provides a civil air defense engineering door, which comprises a door frame and a doorsill, wherein the doorsill and a foundation below the doorsill can be detachably connected. A plurality of guiding holes are seted up to the bottom of door frame, set up a plurality of pinholes that correspond with the guiding hole in the ground, set up the through-hole that corresponds with the pinhole in the threshold, the bottom port of through-hole all has the flaring, all insert in every through-hole and establish the locating pin, the bottom of locating pin is inserted in the pinhole that corresponds, a plurality of mounting groove is distributed to the bottom circumference of locating pin, all be connected with the swivel pin through the round pin hub rotation in every mounting groove, the top of swivel pin is the expansion end, and connect through torque spring between swivel pin and the mounting groove inner wall. The door body is composed of the doorsill and the doorsill, the doorsill and the doorsill can be used independently, the doorsill and the doorsill can be matched to form an integrated switch structure, and the emergency treatment function is good.

Description

Civil air defense engineering door

Technical Field

The application relates to the technical field of civil air defense engineering, in particular to a civil air defense engineering door.

Background

At present, civil air defense projects are combined with civil air defense projects in peacetime and war time, a large number of people and equipment come in and go out at ordinary times, civil air defense doors at the entrances and exits need to be closed in war time, and shock waves and toxic gas are prevented from entering the insides of the civil air defense projects. In order to ensure that the entrance and exit civil air defense door can resist the impact wave in wartime, the civil air defense door is generally provided with a doorsill protruding out of the ground for bearing the impact wave pressure on a door leaf, but the doorsill brings great inconvenience to the people and vehicles in and out at ordinary times.

In order to facilitate the access of a large number of people and vehicles at ordinary times, the existing solutions have two types: 1. some civil air defense doors are not provided with doorsills, but a groove is arranged in front of a door frame, a steel plate is covered on the groove at ordinary times, and after a door leaf is closed in place in wartime, the door leaf is firstly lowered into the groove and then locked, so that the protection and sealing functions of the civil air defense door are realized, but the lifting door is time-consuming and labor-consuming due to the large weight of the door leaf, and the door leaf is inconvenient to open and close; 2. some civil air defense doors adopt the structural style of a movable threshold, the movable threshold is not installed at ordinary times and is convenient to pass, the movable threshold is installed in wartime, but the movable threshold is heavy, difficult to install and long in peacetime function conversion time, and in addition, the movable threshold is inconvenient to store at ordinary times and is easy to lose.

Disclosure of Invention

The present application provides a civil air defense engineering door to improve the above-mentioned problems.

The invention is particularly such that:

a civil air defense engineering door comprises a door frame and a doorsill, wherein the doorsill is detachably connected with a foundation below the doorsill.

The bottom of the door frame is provided with a plurality of guide holes, the foundation is internally provided with a plurality of pin holes corresponding to the guide holes, and the doorsill is internally provided with through holes corresponding to the pin holes.

The bottom ports of the through holes are provided with flaring holes, a positioning pin is inserted into each through hole, and the bottom end of each positioning pin is inserted into the corresponding pin hole.

A plurality of mounting grooves are circumferentially distributed at the bottom end of the positioning pin, a rotating pin is rotatably connected in each mounting groove through a pin shaft, the top end of each rotating pin is a movable end, and the rotating pins are connected with the inner wall of the mounting grooves through torsion springs; .

All install drive assembly on the threshold, shift up with each locating pin of drive in it, move to rotatory round pin when the locating pin and be located the flaring, the movable end of rotatory round pin stretches out the mounting groove, and the top of rotatory round pin is contradicted in the flaring bottom surface that corresponds.

And a traction assembly is further arranged in the door frame to drive each positioning pin to ascend.

Furthermore, a plurality of guide wheels are installed on two sides of a rising channel of the positioning pin in the door frame to guide the positioning pin to rise, and the positioning pin is of a cylindrical structure.

Further, drive assembly includes pinion rack, internal gear, transmission shaft and external gear, wherein, the pinion rack is rather than the rigid coupling along the length direction of locating pin, and the internal gear, install in the threshold and mesh with the pinion rack, and the transmission shaft runs through the threshold, and the inner and the internal gear hookup of transmission shaft, the outer end of transmission shaft are linked in the external gear, and drive assembly still includes the drive each external gear syntropy pivoted actuating mechanism.

Further, actuating mechanism includes drive gear, center pin and carousel unit, the one end of center pin and the surface rotation of threshold are connected, fixed mounting drive gear on the center pin, and the lateral surface of threshold still horizontal sliding connection has a plurality of outer racks, outer rack and drive gear and each external gear meshing, the other end at the center pin is installed to the carousel unit.

Further, the protection casing that holds drive assembly is installed in the outside of threshold, and the casing of protection casing has the protruding edge of round all around, and protruding a plurality of jack that distributes along last, through fixing the protection casing in the threshold outside at jack department construction bolt, and the middle part of protection casing has still seted up the perforation, and the end of center pin passes and connects the carousel unit behind the perforation, and the holding tank is seted up all around to the perforation to hold the carousel unit.

Further, the carousel unit includes that annular carousel and a plurality of fix the dead lever at the carousel inboard, the equal sliding connection in center pin of the other end of dead lever and along the axial slip of center pin.

Furthermore, a plurality of sliding grooves corresponding to the fixing rods are formed in the outer surface of the central shaft along the length direction, sliding blocks connected with the corresponding fixing rods are connected in the sliding grooves in a sliding mode, and one side of each sliding block is connected with the inner wall of each sliding groove through a connecting spring.

Further, the subassembly that pulls includes the activity post, the fixed plate, the fly leaf, reply spring, the telescopic link, the mounting panel, the electro-magnet, wherein, the fixed plate, the fly leaf, the mounting panel from top to bottom parallel arrangement of each other, fixed plate and the inside fixed connection of door frame, the activity post longitudinal sliding pegs graft in the fixed plate, connect through a plurality of telescopic links between fixed plate and the fly leaf, the outside cover of telescopic link is equipped with the reply spring, the electro-magnet sets up on the mounting panel, and with the bottom rigid coupling of activity post, the locating pin is for having magnetic metal product, the use of electro-magnet external power supply.

Further, the lateral surface middle part of locating pin is provided with second positioning sensor, and first positioning sensor is still installed to one side of the ascending passageway of the inherent locating pin of door frame, and first positioning sensor, second positioning sensor are infrared emission, receiving transducer respectively, and positioning slot has still been seted up at the top of locating pin, sets up positioning mechanism in the door frame to the position of fixed positioning pin still is equipped with the controller in the door frame, controller and positioning mechanism and first positioning sensor, second positioning sensor electric connection.

Furthermore, the positioning mechanism comprises a positioning cam and a motor, wherein the motor is installed in the door frame, the positioning cam is horizontally arranged and connected to an output shaft of the motor, and the motor works to drive the positioning cam to rotate so as to be inserted into a positioning clamping groove on the positioning pin.

The invention has the beneficial effects that:

the door frame can be matched with the doorsill to be installed and used to form a single-door structure, or the door frame and the doorsill form a split-door structure, so that the door frame can be selected and used according to actual conditions, the applicability is strong, and the door opening with different sizes can be conveniently installed and used.

The doorsill and the foundation are detachably connected, the position of the doorsill is conveniently fixed, the doorsill and the doorframe are independently used at the moment, and the doorsill can stay on the foundation to play a role in blocking when the door is opened.

The invention can also drive the locating pin to rise through the cooperation of the traction assembly and the driving assembly, the locating pin rises to drive the doorsill and the foundation to be separated and to gradually approach the door frame, meanwhile, after the locating pin moves upwards to a limit position, the bottom end of the locating pin is just in the same plane with the bottom surface of the doorsill, and the top surface of the doorsill is attached to and contacted with the bottom surface of the door frame, so that the doorsill and the door frame form an integral structure, the door opening can be smoothly opened, people can be facilitated, vehicles or other equipment can conveniently pass through, and the invention has good emergency treatment function.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a door frame in embodiment 1 of a civil air defense engineering door provided by the present application;

FIG. 2 is an enlarged view at A of FIG. 1 of a civil air defense engineering door provided by the present application;

FIG. 3 is an enlarged view at B of FIG. 1 of a civil air defense engineering door provided by the present application;

FIG. 4 is a schematic view of the positioning pin structure of embodiment 1 of a civil air defense engineering door provided by the present application;

FIG. 5 is a cut-away view of the inside of the door sill of a civil air defense engineering door provided by the present application;

fig. 6 is a schematic view of a three-dimensional structure of a door sill of a civil air defense engineering door provided by the present application;

FIG. 7 is a schematic structural view of a protective cover of a civil air defense engineering door provided by the present application;

fig. 8 is a schematic structural diagram of a turntable unit of a civil air defense engineering door provided by the present application;

fig. 9 is a schematic structural view of a door frame in embodiment 2 of a civil air defense engineering door provided by the present application;

FIG. 10 is a schematic view of a positioning pin structure in embodiment 2 of a civil air defense engineering door provided by the present application;

fig. 11 an enlarged view at C in fig. 9 of a civil air defense engineering door provided by the present application.

Icon: the door frame 1, the guide hole 101, the doorsill 2, the through hole 201, the flared opening 202, the connecting hole 203, the groove 204, the limit clamping groove 205, the foundation 3, the pin hole 301, the positioning pin 4, the mounting groove 401, the strip groove 402, the positioning clamping groove 403, the first positioning sensor 6, the positioning cam 7, the motor 8, the guide wheel 5, the elastic member 9, the rotating pin 10, the movable column 11, the fixed plate 12, the movable plate 13, the return spring 14, the connecting rod 15, the mounting plate 16, the electromagnet 17, the toothed plate 18, the end cover 19, the projection 20, the second positioning sensor 21, the internal gear 22, the transmission shaft 23, the external toothed strip 24, the limit stopper 25, the limit section 26, the external gear 27, the extrusion block 28, the driving gear 29, the central shaft 30, the protective cover 31, the ledge 32, the jack 33, the receiving groove 34, the perforation 35, the rotary table 36, the fixed rod 37, the slider 38, the sliding groove 39 and the connecting spring 40.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the civil air defense engineering door or the element which is indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

referring to fig. 1 and 9, the civil air defense engineering door comprises a door frame 1 and a door sill 2, wherein the door sill 2 is detachably connected with a foundation 3 below the door sill.

Referring to fig. 3 and 9, a plurality of guide holes 101 are formed in the bottom of the door frame 1, a plurality of pin holes 301 corresponding to the guide holes 101 are formed in the foundation 3, and through holes 201 corresponding to the pin holes 301 are formed in the doorsill 2.

Referring to fig. 5, the bottom ports of the through holes 201 each have a flared opening 202, a positioning pin 4 is inserted into each through hole 201, and the bottom end of the positioning pin 4 is inserted into the corresponding pin hole 301.

Referring to fig. 4, a plurality of mounting grooves 401 are circumferentially distributed at the bottom end of the positioning pin 4, a rotating pin 10 is rotatably connected in each mounting groove 401 through a pin shaft, the top end of the rotating pin 10 is a movable end, and the rotating pin 10 is connected with the inner wall of the mounting groove 401 through a torsion spring; .

Referring to fig. 5 and 6, each of the rocker 2 is provided with a driving assembly for driving each positioning pin 4 therein to move upwards, when the positioning pin 4 moves until the rotating pin 10 is located in the flared opening 202, the movable end of the rotating pin 10 extends out of the mounting groove 401, and the top end of the rotating pin 10 abuts against the inner bottom surface of the corresponding flared opening 202.

Referring to fig. 5 and 6, grooves 204 are formed in one sides of the two doorsills 2, and the extrusion blocks 28 are movably inserted into the grooves 204 through springs, so that the two doorsills are more convenient to butt, are not easy to damage, and are convenient to install and use.

Referring to fig. 1 and 9, a pulling assembly is further arranged in the door frame 1 to drive each positioning pin 4 to ascend.

Referring to fig. 1 and 9, further, a plurality of guide wheels 5 are installed at two sides of a rising channel of a positioning pin 4 in the door frame 1 to guide the positioning pin 4 to rise, and the positioning pin 4 has a cylindrical structure.

Referring to fig. 3 and 11, the elastic member 9 is installed at the bottom of each pin hole 301, the elastic member 9 can be used by a cylindrical spring, the positioning pin 4 can be supported, the limiting clamping groove 205 is formed around the inner wall of the top port of the through hole 201, the end cover 19 is rotatably sleeved at the top end of the positioning pin 4, the protruding block 20 corresponding to the limiting clamping groove 205 is arranged on the side surface of the end cover 20, when the end cover 20 is selected to enable the protruding block 20 to be located in the corresponding limiting clamping groove 205, the positioning pin 4 is fixed in position, and when the protruding block 20 is rotated to be separated from the limiting clamping groove 205, the positioning pin 4 can be moved longitudinally.

Referring to fig. 5 and 6, the driving assembly includes a toothed plate 18, an internal gear 22, a transmission shaft 23 and external gears 27, wherein the toothed plate 18 is fixedly connected to the positioning pin 4 along the length direction thereof, the internal gear 22 is installed in the threshold 2 and engaged with the toothed plate 18, the transmission shaft 23 penetrates through the threshold 2, a connection hole 203 is formed in the threshold 2 to facilitate the rotational installation of the transmission shaft 23, the inner end of the transmission shaft 23 is coupled to the internal gear 22, the outer end of the transmission shaft 23 is coupled to the external gears 27, and the driving assembly further includes a driving mechanism for driving each external gear 27 to rotate in the same direction. Wherein, set up the recess 204 that extends along its length direction at the side of locating pin 4, install pinion rack 18 in recess 204 for locating pin 204 longitudinal movement is more convenient, and wherein recess 204 protrusion in the outer wall of locating pin 4, in order to avoid internal gear 22 to interfere the longitudinal movement of locating pin 4, uses more reliably.

Referring to fig. 5, 6 and 7, further, the driving mechanism includes a driving gear 29, a central shaft 30 and a turntable unit, one end of the central shaft 30 is rotatably connected with the outer surface of the rocker 2, the driving gear 29 is fixedly installed on the central shaft 30, a plurality of outer racks 24 are horizontally and slidably connected to the outer side surface of the rocker 2, the outer racks 24 are engaged with the driving gear 29 and the outer gears 27, and the turntable unit is installed at the other end of the central shaft 30.

Referring to fig. 7 and 8, a protective cover 31 for accommodating a driving assembly is mounted on the outer side of the threshold 2, a circle of convex edge 32 is arranged around the shell of the protective cover 31, a plurality of insertion holes 33 are distributed on the convex edge 32, the protective cover 31 is fixed on the outer side of the threshold 2 by mounting bolts at the insertion holes 33, a through hole 35 is further formed in the middle of the protective cover 31, the end of the central shaft 30 passes through the through hole 35 and then is connected with a turntable unit, and an accommodating groove 34 is formed around the through hole 35 to accommodate the turntable unit.

Referring to fig. 8, the turntable unit includes an annular turntable 36 and a plurality of fixing rods 37 fixed inside the turntable 36, and the other ends of the fixing rods 37 are slidably connected to the central shaft 30 and slide along the axial direction of the central shaft 30.

Referring to fig. 8, as a further improvement of the above solution, the outer surface of the central shaft 30 is provided with a plurality of sliding grooves 39 corresponding to the fixing rods 37 along the length direction, the sliding grooves 39 are slidably connected with sliding blocks 38 connected with the corresponding fixing rods 37, and one side of the sliding blocks 38 is connected with the inner walls of the sliding grooves 39 through connecting springs 40.

Referring to fig. 2, further, the traction assembly includes a movable column 11, a fixed plate 12, a movable plate 13, a return spring 14, a telescopic rod 15, a mounting plate 16, and an electromagnet 17, wherein the fixed plate 12, the movable plate 13, and the mounting plate 16 are arranged in parallel from top to bottom, the fixed plate 12 is fixedly connected with the inside of the door frame 1, the movable column 11 is inserted into the fixed plate 12 in a longitudinal sliding manner, the fixed plate 12 and the movable plate 13 are connected by a plurality of telescopic rods 15, the return spring 14 is sleeved on the outer side of the telescopic rod 15, the electromagnet 17 is arranged on the mounting plate 16 and fixedly connected with the bottom end of the movable column 11, the positioning pin 4 is a magnetic metal product, and the electromagnet 17 is externally connected with a power supply.

Example 2:

referring to fig. 9 and 10, a second positioning sensor 21 is arranged in the middle of the outer side surface of the positioning pin 4, a first positioning sensor 6 is further installed on one side of a rising channel of the positioning pin 4 in the door frame 1, the first positioning sensor 6 and the second positioning sensor 21 are respectively an infrared emitting sensor and an infrared receiving sensor, a positioning clamping groove 403 is further formed in the top of the positioning pin 4, a positioning mechanism is arranged in the door frame 1 to fix the position of the positioning pin 4, and a controller is further arranged in the door frame 1 and electrically connected with the positioning mechanism, the first positioning sensor 6 and the second positioning sensor 21.

Referring to fig. 9, the positioning mechanism includes a positioning cam 7 and a motor 8, wherein the motor 8 is installed in the door frame 1, the positioning cam 7 is horizontally disposed and connected to an output shaft of the motor 8, and the motor 8 operates to drive the positioning cam 7 to rotate so as to be inserted into a positioning slot 403 on the positioning pin 4. The present embodiment is a further improvement on the basis of embodiment 1, and the rest of the structure is the same as embodiment 1.

In the work of the invention, a single-door is formed by installing and using the door frame 1 and the doorsill 2, or the two pairs of door frames 1 and the doorsill 2 form a split door structure which can be selected for use according to actual conditions, and when the split door structure is specifically installed, a pinhole 301 is arranged on the foundation where the civil air defense engineering door is installed in advance, and the doorsill 2 with the corresponding size is placed on the foundation, so that the pin holes 301 on the foundation 3 and the through holes 201 on the door sill 2 are correspondingly communicated, the positioning pins 4 are inserted into the through holes 201, then the bottom end of the positioning pin 4 is inserted into the bottom of the pin hole 301 and supported by the elastic member 9, at this time, the end cap 19 is rotated, so that the protrusion 20 is located in the limiting slot 205 of the inner wall of the through hole 201, the position of the threshold 2 is finally fixed, at the moment, the threshold 2 and the doorframe 1 are independently used, and the threshold 2 can stay on the foundation to play a role in blocking when the door is opened; when the door sill needs to be opened completely, the central shaft 30 is driven to rotate through the turntable unit, the central shaft 30 rotates to drive the driving gear 29 on the central shaft to rotate along with the central shaft, the driving gear is meshed with each outer gear 27 to drive the corresponding outer gear strip to slide, so that each inner gear 22 is driven to rotate correspondingly, each inner gear 22 is meshed with the toothed plate 18 on the outer side of the positioning pin 4 to finally drive the positioning pin 4 to ascend, when the positioning pin 4 ascends until the rotating pin 10 on the positioning pin 4 is positioned in the flaring 202 of the through hole 201, as the diameter of the flaring 202 is larger than that of the through hole, the rotating pin 10 rotates outwards under the restoring force of the torsion spring to continuously ascend the positioning pin 4, the top end of the rotating pin 10 is abutted against the inner bottom surface of the flaring 202 to drive the door sill 2 to ascend along with the positioning pin, and after the electromagnet 17 in the device is electrified, the magnetic force of the electromagnet adsorbs the corresponding positioning pin 4 to continuously ascend until the positioning pin is contacted with the electromagnet, after the upward movement of locating pin 4 extremely spacing, the bottom of locating pin 4 just in time is in the coplanar with the bottom surface of threshold 2 to the top surface laminating of threshold 2 contacts in the bottom surface of door frame 1, makes the two form an overall structure, can open the door opening smoothly, and more than make things convenient for the crowd, still make things convenient for vehicle or other equipment to pass.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A civil air defense engineering door is characterized by comprising a door frame (1) and a threshold (2), wherein the threshold (2) is detachably connected with a foundation (3) below the threshold;

the bottom of the door frame (1) is provided with a plurality of guide holes (101), the foundation (3) is internally provided with a plurality of pin holes (301) corresponding to the guide holes (101), and the doorsill (2) is internally provided with through holes (201) corresponding to the pin holes (301);

the bottom ports of the through holes (201) are provided with flaring holes (202), a positioning pin (4) is inserted into each through hole (201), and the bottom end of each positioning pin (4) is inserted into the corresponding pin hole (301);

a plurality of mounting grooves (401) are circumferentially distributed at the bottom end of the positioning pin (4), a rotating pin (10) is rotatably connected in each mounting groove (401) through a pin shaft, the top end of each rotating pin (10) is a movable end, and the rotating pins (10) are connected with the inner walls of the mounting grooves (401) through torsion springs;

the doorsill (2) is provided with a driving assembly for driving each positioning pin (4) in the doorsill to move upwards, when the positioning pins (4) move to the rotating pins (10) and are positioned in the flaring openings (202), the movable ends of the rotating pins (10) extend out of the mounting grooves (401), and the top ends of the rotating pins (10) are abutted to the inner bottom surfaces of the corresponding flaring openings (202);

and a traction assembly is further arranged in the door frame (1) to drive each positioning pin (4) to ascend.

2. The civil air defense engineering door according to claim 1, characterized in that a plurality of guide wheels (5) are arranged on two sides of the ascending channel of the positioning pin (4) in the door frame (1) to guide the positioning pin (4) to ascend, and the positioning pin (4) is of a cylindrical structure.

3. The civil air defense engineering door according to claim 1, characterized in that, the drive assembly includes pinion rack (18), internal gear (22), transmission shaft (23) and external gear (27), wherein, pinion rack (18) is rather than the rigid coupling along the length direction of locating pin (4), internal gear (22), install in threshold (2) and mesh with pinion rack (18), transmission shaft (23) run through threshold (2), the inner of transmission shaft (23) couples with internal gear (22), the outer end of transmission shaft (23) couples in external gear (27), the drive assembly still includes the actuating mechanism of the syntropy pivoted of each external gear (27).

4. The civil air defense engineering door according to claim 3, characterized in that the driving mechanism comprises a driving gear (29), a central shaft (30) and a turntable unit, one end of the central shaft (30) is rotatably connected with the outer surface of the door sill (2), the driving gear (29) is fixedly arranged on the central shaft (30), the outer side surface of the door sill (2) is also horizontally and slidably connected with a plurality of outer racks (24), the outer racks (24) are meshed with the driving gear (29) and all outer gears (27), and the turntable unit is arranged at the other end of the central shaft (30).

5. The civil air defense engineering door according to claim 4, characterized in that a protective cover (31) for accommodating the driving assembly is arranged on the outer side of the threshold (2), a circle of convex edge (32) is arranged on the periphery of the shell of the protective cover (31), a plurality of insertion holes (33) are distributed on the convex edge (32), the protective cover (31) is fixed on the outer side of the threshold (2) by installing bolts at the insertion holes (33), a through hole (35) is formed in the middle of the protective cover (31), the tail end of the central shaft (30) passes through the through hole (35) and then is connected with the turntable unit, and an accommodating groove (34) is formed in the periphery of the through hole (35) for accommodating the turntable unit.

6. A civil air defense engineering door according to claim 1, characterized in that the turntable unit comprises an annular turntable (36) and a plurality of fixing rods (37) fixed inside the turntable (36), and the other ends of the fixing rods (37) are slidably connected to the central shaft (30) and slide along the axial direction of the central shaft (30).

7. The civil air defense engineering door according to claim 6, characterized in that the outer surface of the central shaft (30) is provided with a plurality of sliding grooves (39) corresponding to the fixing rods (37) along the length direction, the sliding grooves (39) are internally and slidably connected with sliding blocks (38) connected with the corresponding fixing rods (37), and one side of each sliding block (38) is connected with the inner wall of each sliding groove (39) through a connecting spring (40).

8. Civil air defense engineering door according to claim 1, characterized in that the traction assembly comprises a movable post (11), a fixed plate (12), a movable plate (13), a return spring (14), a telescopic rod (15), a mounting plate (16), an electromagnet (17), wherein, fixed plate (12), fly leaf (13), mounting panel (16) parallel arrangement from top to bottom each other, fixed plate (12) and door frame (1) inside fixed connection, activity post (11) longitudinal sliding pegs graft in fixed plate (12), connect through a plurality of telescopic links (15) between fixed plate (12) and fly leaf (13), the outside cover of telescopic link (15) is equipped with answer spring (14), electro-magnet (17) set up on mounting panel (16), and with the bottom rigid coupling of activity post (11), locating pin (4) are for having magnetic metal product, electro-magnet (17) external power source uses.

9. The civil air defense engineering door according to claim 8, characterized in that a second positioning sensor (21) is arranged in the middle of the outer side surface of the positioning pin (4), a first positioning sensor (6) is further installed on one side of the ascending channel of the positioning pin (4) in the door frame (1), the first positioning sensor (6) and the second positioning sensor (21) are respectively an infrared emitting sensor and an infrared receiving sensor, a positioning clamping groove (403) is further formed in the top of the positioning pin (4), a positioning mechanism is arranged in the door frame (1) to fix the position of the positioning pin (4), a controller is further arranged in the door frame (1), and the controller is electrically connected with the positioning mechanism, the first positioning sensor (6) and the second positioning sensor (21).

10. Civil air defense engineering door according to claim 9, characterized in that the positioning mechanism comprises a positioning cam (7) and a motor (8), wherein the motor (8) is installed in the door frame (1), the positioning cam (7) is horizontally arranged and connected on the output shaft of the motor (8), and the motor (8) is operated to drive the positioning cam (7) to rotate so as to be inserted into the positioning slot (403) on the positioning pin (4).