Fireproof and explosion-proof civil air defense sealing door

Abstract

The present application relates to the technical field of civil air defense, and discloses a fireproof and explosion-proof civil air defense sealing door, which comprises a door frame fireproof sealing strip fixedly connected to the inner side surface of the door frame, and a rotating door sill mechanism fixedly connected to the lower surface of the door frame. The rotating door sill mechanism comprises an embedded box body, a first supporting seat and a second supporting seat. The first supporting seat is slidably connected with a first nut seat through a sliding groove and is rotatable by 180 degrees through meshing with a first rack. The first nut seat drives a linkage shaft to rotate, so that a linkage lead screw installed on the second supporting seat rotates synchronously, and a second nut seat moves downward synchronously, so that a second rotating fork rotates by 180 degrees through meshing with a second rack while moving downward. The above action switches the positions of a flat pedal in the rotating door sill mechanism and a protective door sill, so that the protective door sill is convenient to use in the opening state of the civil air defense door, and personnel and vehicles can conveniently pass through through the flat pedal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of people's air defense, in particular to a fireproof and explosion-proof air defense sealing door. BACKGROUND

[0002] The air defense door is the door of the entrance of the people's air defense engineering, and is the activity of the government mobilization and organization of the masses, the adoption of air raid prevention, disaster relief measures, the implementation of rescue actions, the prevention and mitigation of disaster hazards, and the air defense door is the civil defense protection equipment. The air defense door is generally made of hard steel material, has a certain anti-shock wave effect, and effectively ensures the safety and stability of the air defense space inside.

[0003] The threshold structure of the air defense door currently in use is divided into fixed threshold and movable threshold, and the fixed threshold is generally integrated with the door frame, and the movable threshold is used in a detachable form, both of which have certain disadvantages. The movable threshold is easily lost due to the detachable threshold, and the fixed threshold is not convenient for vehicle and personnel to pass through due to the influence of the fixed threshold during daily use. Therefore, in view of the above-mentioned deficiencies, the present application provides a fireproof and explosion-proof air defense sealing door. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art, and provides a fireproof and explosion-proof air defense sealing door. The rotating threshold mechanism is driven by the worm through the hand wheel disc, so that the worm gear connected with the worm drives the main shaft to rotate, the first nut seat installed above the first support seat is moved, and the first rotating fork is rotated by one hundred and eighty degrees through the meshing with the first rack while moving downward, and the linkage shaft is rotated through the main shaft, so that the linkage screw rod installed on the second support seat is synchronously rotated, so that the second nut seat is synchronously moved downward, so that the second rotating fork is rotated by one hundred and eighty degrees through the meshing with the second rack while moving downward. The above actions enable the position of the flat pedal in the rotating threshold mechanism and the protective threshold to be switched, so as to realize the convenient use of the protective threshold in the air defense door enabled state, and the convenient daily passage of personnel and vehicles in the unenabled state. The vertical column arranged at the connection between the door leaf and the door frame supports the gravity of the door leaf itself through the vertical column, effectively avoids the deformation of the door frame caused by long-time stress, and effectively enhances the explosion-proof capacity through the connection between the vertical column and the top plate and the ground.

[0005] The application further provides the fireproof and explosion-proof security door with the above-mentioned one, which comprises a door frame, an inner side surface of the door frame is fixedly connected with a door frame fireproof sealing strip, a lower surface of the door frame is fixedly connected with a rotating door sill mechanism, the rotating door sill mechanism comprises an embedded box body, a first supporting base, a second supporting base, the first supporting base is slidably connected with a first nut base through a sliding groove, the first nut base is rotatably connected with a rotating support rod on one side surface of the sliding groove, one end of the rotating support rod close to the first supporting base is fixedly connected with a first rotating fork, an outer surface of the first supporting base is fixedly connected with a first gear rack, the first rotating fork is engaged with the first gear rack, the outer surface of the first supporting base is fixedly connected with a first shaft seat, the first shaft seat is rotatably connected with a driving shaft, the outer surface of the driving shaft is provided with threads, the first nut base is connected with the threads on the driving shaft through a lead screw nut;

[0006] The second supporting base is slidably connected with a second nut base through a sliding groove, the second nut base is rotatably connected with the rotating support rod on one side surface of the sliding groove, one end of the rotating support rod close to the second supporting base is fixedly connected with a second rotating fork, an outer surface of the second supporting base is fixedly connected with a second gear rack, the second gear rack is engaged with the second rotating fork, the second nut base is connected with a linkage lead screw through a lead screw nut, an outer surface of the second supporting base is fixedly connected with a second shaft seat, and the second shaft seat is rotatably connected with the linkage lead screw; both sides of the rotating support rod are fixedly connected with fixed bases, one side surface of the fixed base is fixedly connected with a flat pedal, the other side surface of the fixed base is fixedly connected with a connecting base, one end of the connecting base is fixedly connected with a protective door sill, an inner bottom wall of the embedded box body is fixedly connected with a linkage shaft seat, the linkage shaft seat is rotatably connected with a linkage shaft in the inside, one end of the linkage shaft is connected with the driving shaft through a right-angle transmission gear set, and the other end of the linkage shaft is connected with the linkage lead screw through a right-angle transmission gear set;

[0007] The right side of the door frame is internally provided with a gear groove, the right side of the door frame is internally provided with an axle groove, the axle groove is in communication with the gear groove, a worm is rotatably connected in the gear groove, the driving shaft is located in the axle groove, the upper end surface of the driving shaft is fixedly connected with a worm wheel, the worm wheel is located in the gear groove, the worm wheel is in meshing engagement with the worm, one end of the worm is fixedly connected with a wheel disc connecting seat, the left side of the door frame is fixedly connected with a connecting arm, the connecting arm is rotatably connected with a stand column, the outer surface of the stand column is fixedly connected with a heavy hinge, the stand column is hingedly connected with a door leaf through the heavy hinge, the outer surface of the door leaf is provided with door lock mechanisms on the left side and the right side, the outer surface of the door leaf is fixedly connected with a hand wheel disc rack, the hand wheel disc rack is detachably connected with a hand wheel disc, the center of the hand wheel disc is provided with an outer hexagonal connector, the outer surface of the wheel disc connecting seat is provided with an inner hexagonal connector, the outer hexagonal connector and the inner hexagonal connector are in clamping engagement, and the outer surface of the door leaf is provided with a sealed groove.

[0008] According to the fireproof and explosion-proof civil defense airtight door, the door lock mechanism comprises a handle, a driving arm and a linkage rod, the handle is fixedly connected with one end of the driving arm through a connecting shaft, the other end of the driving arm is rotatably connected with the linkage rod through a rotating shaft, the upper end of the linkage rod is connected with an upper movable lock bolt through a shaft, the upper movable lock bolt is rotatably connected with the door leaf through a rotating shaft, and the lower end of the linkage rod is connected with a lower movable lock bolt through a shaft. The door lock mechanism can make the door leaf and the door frame of the civil defense door tightly combine after being closed.

[0009] According to the fireproof and explosion-proof civil defense airtight door, the inner surfaces of the left side and the right side of the door frame are provided with lock holes, the upper movable lock bolt and the lower movable lock bolt mounted on the door leaf are respectively inserted into the lock holes when being closed, and the civil defense door is locked.

[0010] According to the fireproof and explosion-proof civil defense airtight door, the upper end surface of the stand column is rotatably connected with a top support, and the lower end surface of the stand column is rotatably connected with a bottom support. The top support is connected with a floor slab, and the bottom support is connected with the ground, so that the strength of the civil defense door is improved, and the explosion-proof capacity is improved.

[0011] The utility model provides a fire -proof and explosion -proof civil air defence airtight door, the upper surface of the embedded box is hinged with movable cover plate, the left side surface of the embedded box is fixedly connected with second protective cover, the inboard surface of second protective cover is fixedly connected with second support base, the right side surface of the embedded box is fixedly connected with first protective cover, the inboard surface of first protective cover is fixedly connected with first support base. Through the opening of movable cover plate, the movable space for the rotating protection door sill is effectively provided, and through the setting of first protective cover and second protective cover, the movable components in the interiors thereof are effectively protected.

[0012] The utility model provides a fire -proof and explosion -proof civil air defence airtight door, the outer surface of first support base is fixedly connected with first clamping bolt, first clamping bolt is equipped with two, two first clamping bolt is located the upper and lower ends of slide groove respectively, first rotary fork is mutually clamped with two first clamping bolt respectively, the outer surface of second support base is fixedly connected with second clamping bolt, second clamping bolt is equipped with two, two second clamping bolt is located the upper and lower ends of slide groove respectively, second rotary fork is mutually clamped with two second clamping bolt respectively, the upper surface of first support base, second support base is fixedly connected with baffle, the baffle of first support base one side is rotatably connected with driving shaft, the baffle of second support base one side is rotatably connected with the upper end surface of linkage screw rod, realize the positioning of first rotary fork in two orientation of upper and lower with first clamping bolt, and realize the positioning of second rotary fork in two orientation of upper and lower with second clamping bolt.

[0013] The utility model provides a fire -proof and explosion -proof civil air defence airtight door, the side surface of protection door sill is fixedly connected with protection door sill fire -proof sealing strip, protection door sill fire -proof sealing strip is movably connected with door frame fire -proof sealing strip, door frame fire -proof sealing strip is movably connected with airtight groove, protection door sill fire -proof sealing strip is movably connected with airtight groove, through the connection of door frame fire -proof sealing strip and airtight groove to make civil air defence door reach airtight effect.

[0014] The utility model provides a fire -proof and explosion -proof civil air defence airtight door, the inner bottom wall of the embedded box is fixedly connected with linkage shaft protective cover, linkage shaft protective cover is fixedly connected with linkage shaft seat. Through the setting of linkage shaft protective cover, the effective protection of linkage shaft seat and linkage shaft is realized.

[0015] Compared with the prior art, the fireproof and explosion-proof civil defense airtight door of the present application can switch the position of the flat tread plate and the protective door sill in the rotating door sill mechanism through the above actions, so as to realize convenient use of the protective door sill in the use state of the civil defense door, and convenient daily passing of personnel and vehicles in the non-use state through the flat tread plate.

[0016] Compared with the prior art, the fireproof and explosion-proof civil defense airtight door of the present application can support the gravity of the door leaf through the stand column arranged at the connection between the door leaf and the door frame, effectively avoid the deformation of the door frame caused by long-time stress, and effectively strengthen the explosion-proof capacity through the connection between the stand column and the top plate and the ground. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and examples.

[0018] Figure 1 It is a whole structure diagram of the fireproof and explosion-proof civil defense airtight door of the present application.

[0019] Figure 2 It is a side view of the fireproof and explosion-proof civil defense airtight door of the present application.

[0020] Figure 3 It is a structure diagram of the fireproof and explosion-proof civil defense airtight door of the present application when the protective door sill is used.

[0021] Figure 4 It is a rotating door sill mechanism diagram of the fireproof and explosion-proof civil defense airtight door of the present application.

[0022] Figure 5 It is an internal structure diagram of the rotating door sill mechanism of the fireproof and explosion-proof civil defense airtight door of the present application.

[0023] Figure 6 It is a structure diagram of the second rotating tooth fork of the fireproof and explosion-proof civil defense airtight door of the present application.

[0024] Figure 7 It is a structure diagram of the first rotating tooth fork of the fireproof and explosion-proof civil defense airtight door of the present application.

[0025] Figure 8It is a cross-section structure diagram of the door frame of the fireproof and explosion-proof civil defense sealing door.

[0026] Legend:

[0027] 1, door frame; 2, door leaf; 3, upright column; 4, top support; 5, bottom support; 6, heavy hinge; 7, sealing groove; 8, door lock mechanism; 801, handle; 802, driving arm; 803, linkage rod; 804, upper movable lock bolt; 805, lower movable lock bolt; 9, rotating door sill mechanism; 901, flat tread; 902, movable cover plate; 903, protective door sill; 904, embedded box; 905, first protective cover; 906, linkage shaft protective cover; 907, second protective cover; 908, baffle; 909, driving shaft; 910, wheel disc connecting seat; 911, worm; 912, worm wheel; 913, first nut seat; 914, first support seat; 915, first shaft seat; 916, linkage shaft seat; 917, linkage shaft; 918, first rotating toothed fork; 919, rotating support rod; 920, fixed seat; 921, connecting seat; 922, protective door sill fireproof sealing strip; 923, first rack; 924, first clamping bolt; 925, second support seat; 926, second nut seat; 927, linkage screw; 928, second shaft seat; 929, second rotating toothed fork; 930, second clamping bolt; 931, second rack; 10, fixed lug; 11, door frame fireproof sealing strip; 12, hand wheel disc holder; 13, lock hole; 14, hand wheel disc; 15, gear groove; 16, shaft groove. DETAILED DESCRIPTION

[0028] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0029] Reference Figures 1-8The embodiment of the application is a fireproof and explosion-proof civil defense airtight door, which comprises a door frame 1, an inner side surface of the door frame 1 is fixedly connected with a door frame fireproof sealing strip 11, the door frame fireproof sealing strip 11 expands when a fire occurs, blocks the door joint gap, blocks the air circulation between two spaces, effectively prevents the hazards of early fire smoke, toxic gas and hot gas to the human body and controls the spread of fire. The lower surface of the door frame 1 is fixedly connected with a rotating door sill mechanism 9, the rotating door sill mechanism 9 comprises an embedded box body 904, a first support seat 914, a second support seat 925, the first support seat 914 is slidingly connected with a first nut seat 913 through a sliding groove, the first nut seat 913 is rotatably connected with a rotating support rod 919 on one side surface of the sliding groove, one end of the rotating support rod 919 close to the first support seat 914 is fixedly connected with a first rotating toothed fork 918, one side arc surface of the first rotating toothed fork 918 is provided with a tooth engaged with a first rack 923, the stroke is just enough to make the first rotating toothed fork 918 effectively rotate one hundred and eighty degrees, and the other side of the first rotating toothed fork 918 is provided with a U-shaped fork, the outer surface of the first support seat 914 is fixedly connected with the first rack 923, the first rotating toothed fork 918 is engaged with the first rack 923, the outer surface of the first support seat 914 is fixedly connected with a first shaft seat 915, the first shaft seat 915 is rotatably connected with a driving shaft 909, wherein the connection between the driving shaft 909 and the first shaft seat 915 adopts a stepped shaft form, the purpose is to realize rotation while making the first shaft seat 915 support the driving shaft 909, the outer surface of the driving shaft 909 is provided with a thread, the first nut seat 913 is connected with the thread on the driving shaft 909 through a screw nut.

[0030] The second support base 925 is slidably connected with a second nut base 926 through a sliding groove. The second nut base 926 is located on one side surface of the sliding groove and is rotationally connected with the rotating support rod 919. One end of the rotating support rod 919 close to the second support base 925 is fixedly connected with a second rotating fork 929. One side arc surface of the second rotating fork 929 is provided with a tooth that is engaged with a second rack 931. The stroke of the tooth is just enough to make the second rotating fork 929 effectively rotate one hundred and eighty degrees. The other side of the second rotating fork 929 is provided with a U-shaped fork. The outer surface of the second support base 925 is fixedly connected with the second rack 931. The second rack 931 is engaged with the second rotating fork 929. The second nut base 926 is connected with a linkage lead screw 927 through a screw nut. The linkage lead screw 927 connected with the second nut base 926 and the driving shaft 909 connected with the first nut base 913 adopt a positive and negative thread assembly form. The purpose is to make the moving directions of the first nut base 913 and the second nut base 926 consistent. The outer surface of the second support base 925 is fixedly connected with a second shaft base 928. The second shaft base 928 is rotationally connected with the linkage lead screw 927. The connection between the linkage lead screw 927 and the second shaft base 928 adopts a stepped shaft connection form. The function is to satisfy the rotation of the linkage lead screw 927 and make the second shaft base 928 support the linkage lead screw 927.

[0031] The left and right sides of the rotating support rod 919 are fixedly connected with fixed bases 920. One side surface of the fixed base 920 is fixedly connected with a flat pedal 901. The upper surface of the flat pedal 901 is kept horizontal with the ground when the flat pedal 901 is used. The purpose is to facilitate the passage of pedestrians and vehicles. The other side surface of the fixed base 920 is fixedly connected with a connecting base 921. One end of the connecting base 921 is fixedly connected with a protective door sill 903. The height of the protective door sill 903 protrudes from the ground when the protective door sill 903 is used. The left and right sides of the protective door sill 903 are connected with the left and right bottom ends of the door frame 1. The inner bottom wall of the embedded box body 904 is fixedly connected with a linkage shaft base 916. The linkage shaft base 916 is rotationally connected with a linkage shaft 917 inside. The linkage shaft 917 effectively transmits the power output by the driving shaft 909 to one side of the linkage lead screw 927 through the linkage shaft 917. One end of the linkage shaft 917 is connected with the driving shaft 909 through a right-angle transmission gear set. The other end of the linkage shaft 917 is connected with the linkage lead screw 927 through a right-angle transmission gear set. The speed ratio of the right-angle transmission gear sets adopted by the two ends of the linkage shaft 917 is one to one. The function is to achieve the same rotation speed.

[0032] The right inner side of the door frame 1 is provided with a gear groove 15, the right inner side of the door frame 1 is provided with a shaft groove 16, the shaft groove 16 is communicated with the gear groove 15, the inside of the gear groove 15 is rotatably connected with a worm 911, the inside of the shaft groove 16 is located with a driving shaft 909, the upper end surface of the driving shaft 909 is fixedly connected with a worm wheel 912, the worm wheel 912 is located in the inside of the gear groove 15, the worm wheel 912 is meshed with the worm 911, one end of the worm 911 is fixedly connected with a wheel disc connecting seat 910, the left side of the door frame 1 is fixedly connected with a connecting arm, the connecting arm is rotatably connected with a stand column 3, the upper end surface of the stand column 3 is rotatably connected with a top support 4, the top support 4 and the lower surface of the floor form a support, and the top support 4 is fixedly connected through a bolt, the lower end surface of the stand column 3 is rotatably connected with a bottom support 5, the bottom support 5 and the ground form a support, and the bottom support 5 is fixedly connected through a bolt. The outer surface of the stand column 3 is fixedly connected with a heavy hinge 6, the stand column 3 is hingedly connected with a door leaf 2 through the heavy hinge 6, the door leaf 2 is cast iron and the door leaf 2 is coated with heat-resistant concrete. The outer surface of the door leaf 2 is provided with a door lock mechanism 8 on the left and right sides, the outer surface of the door leaf 2 is fixedly connected with a hand wheel disc rack 12, the inside of the hand wheel disc rack 12 is detachably connected with a hand wheel disc 14, the center of the hand wheel disc 14 is provided with an outer hexagonal connector, the outer surface of the wheel disc connecting seat 910 is provided with an inner hexagonal connector, the outer hexagonal connector and the inner hexagonal connector are mutually clamped, the wheel disc connecting seat 910 is arranged on the right side frame of the door frame 1, and the end of the inner hexagonal connector is flush with the surface of the door frame 1, the outer surface of the door leaf 2 is provided with a sealed groove 7, the inner surfaces of the left and right sides of the door frame 1 are provided with lock holes 13, the upper movable lock bolt 804 is connected with the lock hole 13, the lower movable lock bolt 805 is connected with the lock hole 13, the upper surface and the left and right surfaces of the door frame 1 are fixedly connected with fixed ears 10, and the door frame 1 is better combined with the cast concrete during installation through the fixed ears 10.

[0033] The door lock mechanism 8 comprises a handle 801, a driving arm 802 and a linkage rod 803, the handle 801 is fixedly connected with one end of the driving arm 802 through a connecting shaft, the other end of the driving arm 802 is rotatably connected with the linkage rod 803 through a rotating shaft, the upper end of the linkage rod 803 is connected with an upper movable lock bolt 804 through a shaft, the upper movable lock bolt 804 is rotatably connected with the door leaf 2 through a rotating shaft, the lower end of the linkage rod 803 is connected with a lower movable lock bolt 805 through a shaft, and the lower movable lock bolt 805 is rotatably connected with the door leaf 2 through a rotating shaft.

[0034] The upper surface of the embedded box 904 is hinged with a movable cover plate 902, which is located on the side where the door leaf 2 moves. The left side surface of the embedded box 904 is fixedly connected with a second protective cover 907, the inner side surface of which is fixedly connected with a second support seat 925. The right side surface of the embedded box 904 is fixedly connected with a first protective cover 905, the inner side surface of which is fixedly connected with a first support seat 914. The outer surface of the first support seat 914 is fixedly connected with a first clamping bolt 924, and two first clamping bolts 924 are arranged at the upper and lower ends of the sliding groove. The first rotating fork 918 is respectively clamped with the two first clamping bolts 924. The outer surface of the second support seat 925 is fixedly connected with a second clamping bolt 930, and two second clamping bolts 930 are arranged at the upper and lower ends of the sliding groove. The second rotating fork 929 is respectively clamped with the two second clamping bolts 930. The upper surfaces of the first support seat 914 and the second support seat 925 are fixedly connected with a baffle 908. The baffle 908 located on the side of the first support seat 914 is rotationally connected with the driving shaft 909, and the baffle 908 located on the side of the second support seat 925 is rotationally connected with the upper end surface of the linkage lead screw 927.

[0035] The side surface of the protective door sill 903 is fixedly connected with a protective door sill fireproof sealing strip 922, which is movably connected with the door frame fireproof sealing strip 11. The door frame fireproof sealing strip 11 is movably connected with the closed groove 7. The protective door sill fireproof sealing strip 922 is movably connected with the closed groove 7. The inner bottom wall of the embedded box 904 is fixedly connected with a linkage shaft protective cover 906, which is fixedly connected with a linkage shaft seat 916.

[0036] Working principle: when in use, the movable cover plate 902 is manually opened, the hand wheel disc 14 fixedly connected with the hand wheel disc holder 12 is removed, the external hexagonal connector on the hand wheel disc 14 is butted with the internal hexagonal connector on the disc connecting seat 910, and the hand wheel disc 14 is rotated clockwise. At this time, the worm 911 drives the worm wheel 912 to rotate, so that the driving shaft 909 rotates. When the driving shaft 909 rotates, the linkage shaft 917 is synchronously rotated through the bevel gear set. The other end of the linkage shaft 917 is connected with the linkage lead screw 927 through the bevel gear set, so that the linkage lead screw 927 is synchronously rotated. When the driving shaft 909 rotates, the first nut seat 913 connected with the driving shaft 909 moves downward through the screw nut and the screw teeth arranged on the driving shaft 909. At this time, the second nut seat 926 connected with the linkage lead screw 927 is synchronously moved downward.

[0037] When the first nut seat 913 and the second nut seat 926 are synchronously moved downward, the rotating support rod 919 connected between the first nut seat 913 and the second nut seat 926 is followed to move downward, at this time, the flat pedal 901 installed on the fixed seat 920 is synchronously moved downward by the connecting seat 921, and the first rotating fork 918 and the second rotating fork 929 installed on both sides of the rotating support rod 919 are respectively disengaged from the first clamping bolt 924 and the second clamping bolt 930 with the U-shaped fork parts moving downward.

[0038] When the first rotating fork 918 and the second rotating fork 929 are respectively disengaged from the first clamping bolt 924 and the second clamping bolt 930, at this time, the engaging teeth on the first rotating fork 918 are engaged with the first rack 923, and the engaging teeth on the second rotating fork 929 are engaged with the second rack 931, with the first nut seat 913 and the second nut seat 926 continuously moving downward, the first rotating fork 918 and the second rotating fork 929 are rotated, and through the set number of teeth and the active stroke, the rotation angle of the first rotating fork 918 and the second rotating fork 929 is one hundred and eighty degrees.

[0039] With the rotation of the first rotating fork 918 and the second rotating fork 929, the flat pedal 901 and the protective door sill 903 are rotated and the positions of the flat pedal 901 and the protective door sill 903 in the embedded box 904 are exchanged, when the first rotating fork 918 and the second rotating fork 929 complete one hundred and eighty degrees of rotation, at this time, the engaging teeth on the first rotating fork 918 and the second rotating fork 929 are respectively disengaged from the first rack 923 and the second rack 931, when the first rotating fork 918 is disengaged from the first rack 923, the U-shaped fork part on the first rotating fork 918 is connected to the other first clamping bolt 924, and the second rotating fork 929 and the second rack 931 are disengaged, the U-shaped fork part on the second rotating fork 929 is connected to the other second clamping bolt 930.

[0040] Stop the rotating handle disc 14 and remove it, install it back on the handle disc frame 12, cover the movable cover plate 902, push the door leaf 2 to close it, at this time, the door frame fireproof sealing strip 11 installed on the door frame 1 and the protective door sill fireproof sealing strip 922 installed on the protective door sill 903 are respectively connected with the closed groove 7, and finally the door leaf 2 is locked by pulling the door lock mechanism 8.

[0041] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A fire and explosion-proof civil defense air-locked door, characterized in that, Include: Door frame (1), the inner side surface of the door frame (1) is fixedly connected with door frame fireproof sealing strip (11), the lower surface of the door frame (1) is fixedly connected with rotary door sill mechanism (9), the rotary door sill mechanism (9) includes inner-embedded box (904), first support seat (914), second support seat (925), the first support seat (914) is slidably connected with first nut seat (913) through sliding groove, the first nut seat (913) is rotatably connected with rotary support rod (919) on the one side surface of sliding groove, the end of rotary support rod (919) close to first support seat (914) is fixedly connected with first rotary toothed fork (918), the outer surface of first support seat (914) is fixedly connected with first rack (923), first rotary toothed fork (918) is engaged with first rack (923), the outer surface of first support seat (914) is fixedly connected with first shaft seat (915), first shaft seat (915) is rotatably connected with driving shaft (909), the outer surface of driving shaft (909) is provided with screw threads, the first nut seat (913) is connected with the screw threads on driving shaft (909) through lead screw nut; The second support seat (925) is slidably connected with second nut seat (926) through sliding groove, the second nut seat (926) is rotatably connected with rotary support rod (919) on the one side surface of sliding groove, the end of rotary support rod (919) close to second support seat (925) is fixedly connected with second rotary toothed fork (929), the outer surface of second support seat (925) is fixedly connected with second rack (931), second rack (931) is engaged with second rotary toothed fork (929), the second nut seat (926) is connected with linkage lead screw (927) through lead screw nut, the outer surface of second support seat (925) is fixedly connected with second shaft seat (928), second shaft seat (928) is rotatably connected with linkage lead screw (927); The left and right sides of rotary support rod (919) are fixedly connected with fixed seat (920), one side surface of fixed seat (920) is fixedly connected with flat treadle (901), the other side surface of fixed seat (920) is fixedly connected with connecting seat (921), one end of connecting seat (921) is fixedly connected with protective door sill (903), the inner bottom wall of inner-embedded box (904) is fixedly connected with linkage shaft seat (916), linkage shaft seat (916) is rotatably connected with linkage shaft (917) in the inside, one end of linkage shaft (917) is connected with driving shaft (909) through right-angle transmission gear set, the other end of linkage shaft (917) is connected with linkage lead screw (927) through right-angle transmission gear set; The right side of the door frame (1) is internally provided with a gear slot (15), the right side of the door frame (1) is internally provided with a shaft slot (16), the shaft slot (16) is communicated with the gear slot (15), the inside of the gear slot (15) is rotatably connected with a worm (911), the driving shaft (909) is located in the inside of the shaft slot (16), the upper end surface of the driving shaft (909) is fixedly connected with a worm wheel (912), the worm wheel (912) is located in the inside of the gear slot (15), the worm wheel (912) is meshed with the worm (911), one end of the worm (911) is fixedly connected with a wheel disc connecting seat (910), the left side of the door frame (1) is fixedly connected with a connecting arm, the connecting arm is rotatably connected with a stand (3), the outer surface of the stand (3) is fixedly connected with a heavy hinge (6), the stand (3) is hingedly connected with a door leaf (2) through the heavy hinge (6), the outer surface of the door leaf (2) is provided with a door lock mechanism (8) on the left side and the right side, the outer surface of the door leaf (2) is fixedly connected with a hand wheel disc rack (12), the inside of the hand wheel disc rack (12) is detachably connected with a hand wheel disc (14), the center of the hand wheel disc (14) is provided with an outer hexagonal connector, the outer surface of the wheel disc connecting seat (910) is provided with an inner hexagonal connector, the outer hexagonal connector and the inner hexagonal connector are mutually clamped, and the outer surface of the door leaf (2) is provided with a sealed groove (7).

2. The fire and explosion-proof civil defense security door according to claim 1, characterized in that, The door lock mechanism (8) comprises a handle (801), a driving arm (802) and a linkage rod (803), one end of the handle (801) is fixedly connected with the driving arm (802) through a connecting shaft, the other end of the driving arm (802) is rotatably connected with the linkage rod (803) through a rotating shaft, the upper end of the linkage rod (803) is connected with an upper movable lock bolt (804) through a shaft, the upper movable lock bolt (804) is rotatably connected with the door leaf (2) through a rotating shaft, and the lower end of the linkage rod (803) is connected with a lower movable lock bolt (805) through a shaft.

3. The fire and explosion-proof civil defense security door according to claim 2, characterized in that, The inner surfaces of the left side and the right side of the door frame (1) are both provided with lock holes (13), the upper movable lock bolt (804) is connected with the lock hole (13), the lower movable lock bolt (805) is connected with the lock hole (13), and the upper surface and the left and right side surfaces of the door frame (1) are both fixedly connected with fixed ears (10).

4. The fire and explosion-proof civil defense security door according to claim 1, wherein, The upper end surface of the stand (3) is rotatably connected with a top support (4), and the lower end surface of the stand (3) is rotatably connected with a bottom support (5).

5. The fire and explosion-proof civil defense security door according to claim 1, wherein, The upper surface of the embedded box body (904) is hingedly connected with a movable cover plate (902), the left side surface of the embedded box body (904) is fixedly connected with a second protective cover (907), the inner side surface of the second protective cover (907) is fixedly connected with a second support seat (925), the right side surface of the embedded box body (904) is fixedly connected with a first protective cover (905), and the inner side surface of the first protective cover (905) is fixedly connected with a first support seat (914).

6. The fire and explosion-proof civil defense security door according to claim 1, wherein, The outer surface of the first support seat (914) is fixedly connected with first clamps (924), two first clamps (924) are arranged at the upper and lower ends of the sliding groove respectively, the first rotating fork (918) is respectively clamped with the two first clamps (924), the outer surface of the second support seat (925) is fixedly connected with second clamps (930), two second clamps (930) are arranged at the upper and lower ends of the sliding groove respectively, the second rotating fork (929) is respectively clamped with the two second clamps (930), the upper surfaces of the first support seat (914) and the second support seat (925) are fixedly connected with baffles (908), the baffle (908) located on one side of the first support seat (914) is rotatably connected with the driving shaft (909), and the baffle (908) located on one side of the second support seat (925) is rotatably connected with the upper end surface of the linkage lead screw (927).

7. The fire and explosion-proof civil defense security door according to claim 1, wherein, The side surface of the protective door sill (903) is fixedly connected with a protective door sill fireproof sealing strip (922), the protective door sill fireproof sealing strip (922) is movably connected with the door frame fireproof sealing strip (11), the door frame fireproof sealing strip (11) is movably connected with the closed groove (7), and the protective door sill fireproof sealing strip (922) is movably connected with the closed groove (7).

8. The fire and explosion-proof civil defense security door according to claim 1, wherein, The inner bottom wall of the embedded box body (904) is fixedly connected with a linkage shaft protective cover (906), and the linkage shaft protective cover (906) is fixedly connected with a linkage shaft seat (916).

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