阅读说明：本技术 Frp筋混凝土结构人防门 (FRP reinforced concrete structure civil air defense door ) 是由 张君博 陈鹏飞 张纪刚 李莉 肖薇薇 王向英 梁海志 高嵩 于 2019-09-24 设计创作，主要内容包括：本发明涉及人防工程技术领域,尤其是涉及一种高强度高性能的FRP筋混凝土结构人防门：包括门框、第一门体和联动闭锁；第一门体通过第一转轴、铰页与门框铰接连接；联动闭锁包括：固定轮、钢丝绳和锁头组；固定轮包括内固定轮,内固定轮通过第一转动机构设置于第一门体的内侧并与第一门体转动连接；钢丝绳的一端缠绕在内固定轮的外周壁上,另一端分别穿过各个锁头组的销轴与对应的锁头连接。FRP筋混凝土结构人防门混凝土板内芯设置为FRP筋,为施工人员搬运减负,防止混凝土内部钢筋受到腐蚀,且通过钢丝绳和多个锁头组联动设计,使得开合该人防门更加轻松方便,保证了第一门体与门框的贴合,并节约开合时间。(The invention relates to the technical field of civil air defense engineering, in particular to a high-strength and high-performance FRP reinforced concrete structure civil air defense door which comprises the following components in parts by weight: comprises a door frame, a first door body and a linkage lock; the first door body is hinged with the door frame through a first rotating shaft and a hinge; the linkage latch includes: the fixed wheel, the steel wire rope and the lock head group; the fixed wheel comprises an inner fixed wheel, and the inner fixed wheel is arranged on the inner side of the first door body through a first rotating mechanism and is rotationally connected with the first door body; one end of the steel wire rope is wound on the peripheral wall of the inner fixed wheel, and the other end of the steel wire rope penetrates through the pin shaft of each lock head group to be connected with the corresponding lock head. FRP reinforced concrete structure people's air defense door concrete slab inner core sets up to the FRP muscle, for constructor's transport subtracts the burden, prevents that the inside reinforcing bar of concrete from receiving the corruption, and through wire rope and a plurality of tapered end group linkage design for this people's air defense door of opening and shutting is light convenient more, has guaranteed the laminating of the first door body and door frame, and the time of practicing thrift opening and shutting.)

1. The utility model provides a FRP reinforced concrete structure people's air defense door which characterized in that: comprises a door frame (1), a first door body (2) and a linkage lock;

The door frame (1) is pre-buried in a wall body, the first door body (2) is of an FRP (fiber reinforced plastic) reinforced concrete structure, and the outer surface of the first door body (2) is coated with an epoxy resin coating (10);

The first door body (2) is hinged with the door frame (1) through a first rotating shaft and a hinge (11);

linkage shutting sets up in first door body (2) inboard, the linkage shutting includes: a fixed wheel, a steel wire rope (4) and a lock head group;

The fixed wheel comprises an inner fixed wheel (3), and the inner fixed wheel (3) is arranged on the inner side of the first door body (2) through a first rotating mechanism and is rotationally connected with the first door body (2); the first rotating mechanism includes: the lock sleeve is cylindrical and penetrates through and is fixed on the first door body (2); the lock shaft is rotatably arranged in the lock sleeve, extends out of the lock sleeve in the axial direction of the lock to the first door body (2), and is provided with a lock shaft key groove in the axial direction of the lock shaft so as to be connected with the inner fixed wheel (3);

The lock head group comprises a first lock head (5), a third lock head (7) and a second lock head (6), the first lock head (5), the third lock head (7) and the second lock head are respectively arranged at the upper part and the lower part of the inner side of the first door body (2) and the end part deviating from the hinging direction of the first door body (2) and the door frame (1), and the first lock head (5), the third lock head (7) and the second lock head (6) are respectively connected with the first door body (2) in a rotating way around a pin shaft (15);

Steel wire ropes (4) are respectively arranged between the inner fixed wheel (3) and the first lock head (5), the third lock head (7) and the second lock head (6), one end of each steel wire rope (4) is wound on the outer peripheral wall of the inner fixed wheel (3), and the other end of each steel wire rope penetrates through a pin shaft (15) of each lock head group to be connected with the corresponding lock head; when the inner fixed wheel (3) is rotated clockwise or anticlockwise, the inner fixed wheel (3) drives the steel wire rope (4) to be wound or unwound, and each lock head group is separated from or contacted with the corresponding lock box (8).

2. The FRP-reinforced concrete structural civil air defense door of claim 1, wherein: a T-shaped rotating arm (9) is arranged between the inner fixed wheel (3) and each lock head group, and the inner fixed wheel (3) is rotatably connected with each lock head group through a steel wire rope (4) respectively; the T-shaped rotating arm (9) comprises a rotating arm vertical part (903), a rotating arm left horizontal part (902) and a rotating arm right horizontal part (901), wherein the rotating arm vertical part (903) of the rotating arm is arranged on the inner side of the first door body (2) in a rotating mode around a rotating arm fixing shaft (14), the rotating arm left horizontal part (902) of the rotating arm is connected with one end of a steel wire rope (4) close to one side of the inner fixing wheel (3), and the rotating arm right horizontal part (901) is connected with one end of the steel wire rope (4) close to one side of the locking head group.

3. the FRP-reinforced concrete structural civil air defense door of claim 1, wherein: the inner fixed wheel (3) comprises a fixed wheel sleeve, and the inner wall of the fixed wheel sleeve is axially sleeved and fixed on the lock shaft; the rotating wheel is fixed on the outer wall of the handle sleeve and is fixed with a plurality of rotating arms arranged along the radial direction of the rotating wheel.

4. the FRP-reinforced concrete structural civil air defense door of claim 3, wherein: the inner fixed wheel (3) is provided with a baffle (401) which protrudes out of the inner ring of the inner fixed wheel (3) and is used for preventing the steel wire rope (4) from being separated from the fixed wheel.

5. The FRP-reinforced concrete structural civil air defense door of claim 1, wherein: the fixed wheel further comprises an outer fixing device, the lock sleeve fixedly connected with outer fixing device extends out of the outer portion of the first door body (2) in the lock axial direction of the first rotating mechanism, and the outer fixing device is arranged on the outer side of the first door body (2) in a mode of rotating around the lock shaft simultaneously with the inner fixed wheel (3) through the first rotating mechanism.

6. the FRP reinforced concrete structural civil air defense door of claim 5, wherein: the outer fixing device is an outer fixed wheel and comprises a fixed wheel sleeve and a rotating wheel which have the same structure with the inner fixed wheel (3).

7. The FRP reinforced concrete structural civil air defense door of claim 5, wherein: the external fixation device includes: the inner wall of the handle sleeve is provided with a handle sleeve key groove along the axial direction of the handle sleeve and is sleeved and fixed on the lock shaft; the operating arm is fixedly connected to the outer wall of the handle sleeve; the linkage arm is fixedly connected to the outer wall of the handle sleeve, and an included angle is formed between the linkage arm and the operation arm.

8. The FRP-reinforced concrete structural civil air defense door of claim 1, wherein: the first lock cylinder (5) comprises: the first lock head sleeve (502) is cylindrical and is arranged on the inner side of the first door body (2) in a manner of rotating around the fixed shaft; the first guide rotating arm (503) is fixedly connected with the outer wall of the first lock head sleeve (502), a long hole is formed in the axial direction of the first guide rotating arm (503), and one end of the steel wire rope (4) penetrates through the pin shaft (15) to realize the rotating fit of the steel wire rope (4) and the first guide rotating arm (503); the first rotating arm (501) is fixedly connected to the outer wall of the second lock head (6) sleeve, is driven by the first lock head sleeve (502) to be in contact with or separated from the corresponding lock box (8), and forms an obtuse included angle with the second guiding rotating arm.

9. The FRP-reinforced concrete structural civil air defense door of claim 8, wherein: the second lock head (6) has the same structure as the first lock head (5), and the second lock head (6) is close to the opening of the civil air defense door.

10. The FRP-reinforced concrete structural civil air defense door of claim 8, wherein: the third lock head (7) has the same structure as the first lock head (5) and is vertically and symmetrically distributed with the first lock head (5).

Technical Field

The invention relates to the technical field of civil air defense engineering, in particular to a high-strength and high-performance FRP reinforced concrete structure civil air defense door.

Background

The civil air defense engineering is also called civil air defense, is a protective engineering constructed for preventing and lightening air attack hazards, protecting the life and property safety of the nation and people, and ensuring the command and communication of the air defense of people and the shelter of personnel and materials, and comprises an underground protective building independently constructed for ensuring the shelter of personnel and materials in wartime, the command of air defense of people and medical treatment, and a basement which is constructed by combining the ground building and can be used for air defense in wartime. People's air defense door belongs to civil air defense protective equipment, should satisfy protection and airtight functional requirement. The FRP rib is formed by bonding a plurality of strands of continuous fibers (such as glass fibers, carbon fibers and the like) through base materials (such as polyamide resin, polyethylene resin, epoxy resin and the like), extruding through a special die and drawing. In many types of civil air defense doors, the FRP reinforced concrete civil air defense door is generally applied, and the opening and closing control type of the FRP reinforced concrete civil air defense door is mainly a manual control type, namely the civil air defense door is a manual door.

Disclosure of Invention

The invention provides a high-strength high-performance FRP reinforced concrete structure civil air defense door, which can reduce the weight of the civil air defense door, is easy to carry and install, enhances the durability of the civil air defense door, and is convenient to open and close.

The invention is realized by adopting the following technical scheme:

A civil air defense door with an FRP (fiber reinforced plastic) reinforced concrete structure comprises a door frame, a first door body and a linkage lock;

The door frame is embedded in the wall body, the first door body is of an FRP (fiber reinforced plastic) reinforced concrete structure, and the outer surface of the first door body is coated with an epoxy resin coating;

The first door body is hinged with the door frame through a first rotating shaft and a hinge;

Linkage shutting sets up at first door body inboard, the linkage shutting includes: the fixed wheel, the steel wire rope and the lock head group;

The fixed wheel comprises an inner fixed wheel, and the inner fixed wheel is arranged on the inner side of the first door body through a first rotating mechanism and is rotationally connected with the first door body; the first rotating mechanism includes: the lock sleeve is cylindrical and penetrates through and is fixed on the first door body; the lock shaft is rotatably arranged in the lock sleeve, extends out of the lock sleeve towards the interior of the first door body and is provided with a lock shaft key groove along the axial direction of the lock shaft so as to be connected with the inner fixed wheel;

the lock head group comprises a first lock head, a third lock head and a second lock head, the first lock head, the third lock head and the second lock head are respectively arranged at the upper part and the lower part of the inner side of the first door body and at the end part deviating from the hinge direction of the first door body and the door frame, and the first lock head, the third lock head and the second lock head are respectively connected with the first door body in a rotating way around a pin shaft;

Steel wire ropes are respectively arranged between the inner fixed wheel and the first lock head, between the third lock head and between the inner fixed wheel and the second lock head, one end of each steel wire rope is wound on the outer peripheral wall of the inner fixed wheel, and the other end of each steel wire rope respectively penetrates through the pin shaft of each lock head group to be connected with the corresponding lock head; when the inner fixed wheel is rotated clockwise or anticlockwise, the inner fixed wheel drives the steel wire rope to be wound or unwound, and each lock head group is separated from or contacted with the corresponding lock box.

Furthermore, a T-shaped rotating arm is arranged between the inner fixed wheel and each lock head group, the inner fixed wheel is rotatably connected with each lock head group through a steel wire rope, the T-shaped rotating arm comprises a rotating arm vertical part, a rotating arm left horizontal part and a rotating arm right horizontal part, the rotating arm vertical part of the rotating arm is arranged on the inner side of the first door body in a rotating mode around a fixed shaft, the rotating arm left horizontal part of the rotating arm is connected with one end of the steel wire rope close to one side of the inner fixed wheel, and the rotating arm right horizontal part is connected with one end of the steel wire rope close to one.

Furthermore, the inner fixed wheel comprises a fixed wheel sleeve, and the inner wall of the fixed wheel sleeve is sleeved and fixed on the lock shaft along the axial direction; the rotating wheel is fixed on the outer wall of the handle sleeve and is fixed with a plurality of rotating arms arranged along the radial direction of the rotating wheel.

Furthermore, the inner fixed wheel is provided with a baffle plate which protrudes out of the inner ring of the inner fixed wheel and is used for preventing the steel wire rope from being separated from the fixed wheel.

further, the fixed wheel further comprises an outer fixing device, the lock sleeve fixedly connected with outer fixing device extends out of the lock shaft of the first rotating mechanism towards the outside of the first door body, and the outer fixing device is arranged on the outer side of the first door body through the first rotating mechanism in a mode of rotating around the lock shaft simultaneously with the inner fixed wheel.

Further, the outer fixing device is an outer fixed wheel and comprises a fixed wheel sleeve and a rotating wheel which are the same as the inner fixed wheel in structure.

Further, the external fixation device includes: the inner wall of the handle sleeve is provided with a handle sleeve key groove along the axial direction of the handle sleeve and is sleeved and fixed on the lock shaft; the operating arm is fixedly connected to the outer wall of the handle sleeve; the linkage arm is fixedly connected to the outer wall of the handle sleeve, and an included angle is formed between the linkage arm and the operation arm.

Further, the first lock head includes: the first lock head sleeve is cylindrical and is arranged on the inner side of the first door body in a rotating mode around the fixed shaft; the first guide rotating arm is fixedly connected with the outer wall of the first lock head sleeve, a long hole is formed in the first guide rotating arm in the axial direction, and one end of the steel wire rope penetrates through the pin shaft to realize the rotating fit of the steel wire rope and the first guide rotating arm; the first rotating arm is fixedly connected to the outer wall of the second lock head sleeve, is in contact with or separated from the corresponding lock box under the driving of the first lock head sleeve, and forms an obtuse included angle with the second guide rotating arm.

Further, the second lock head has the same structure as the first lock head, and the second lock head is close to the opening of the civil air defense door.

Furthermore, the third lock head has the same structure as the first lock head and is distributed in vertical symmetry with the first lock head.

The invention has the beneficial effects that:

1. the civil air defense door is set to be an FRP (fiber reinforced plastic) reinforced concrete structure, the outer side steel structure of the civil air defense door of the FRP reinforced concrete structure is sprayed with the epoxy resin coating, the steel structure at the outer side of the civil air defense door of the FRP reinforced concrete structure is prevented from being corroded and damaged, the durability of the civil air defense door of the FRP reinforced concrete structure is ensured, meanwhile, the replacement of the civil air defense door structure of the FRP reinforced concrete structure caused by the corrosion of the outer side steel structure of the civil air defense door of the FRP reinforced concrete structure is avoided.

The FRP reinforced concrete structure people's air defense door concrete slab inner core sets up to the FRP muscle, for constructor's transport subtracts the burden, prevents that the inside reinforcing bar of concrete from receiving the corruption, and the FRP muscle has that the quality is light, tensile strength is high, corrosion resistance is strong, the material cohesion is strong, pass through advantages such as magnetic wave performance is strong, the reinforcing bar that application FRP muscle replaces the tradition to use can improve the durability effect of people's air defense door to further improve the protective effect of people's air defense door.

3. The strength of the concrete is improved by using the FRP ribs, and the self-weight problem of the structure is reduced.

4. The device can be arranged on various civil air defense doors, realizes the function of opening and closing the civil air defense doors, saves the engineering investment and meets the urgent need of engineering.

5. Through the linkage design of wire rope and a plurality of tapered end group for this people's air defense door of opening and shutting is lighter convenient, has guaranteed the laminating of first door body and door frame, and the time of practicing thrift and opening and shutting.

Drawings

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partial structural schematic view of the present invention, which is intended to show the relationship between the inner fixed sheave, the wire rope and each locking head set.

Fig. 3 is a schematic structural diagram of one of the lock head groups of the present invention.

Fig. 4 is a schematic structural view of the external fixation device of the present invention.

Fig. 5 is a schematic structural view of the inner fixed wheel of the present invention.

The respective symbols in the figure are as follows: 1. a door frame; 2. a first door body; 21. a first rotating shaft; 3. an inner fixed wheel; 31. a handle sleeve; 32. an operating arm; 33. a linkage arm; 310. a handle sleeve keyway; 4. a wire rope; 401. a baffle plate; 5. a first lock head; 501. a first rotation arm; 502. a first lock cylinder sleeve; 503. a first guide rotating arm; 6. a second lock head; 601. a second rotating arm; 602. a second lock cylinder sleeve; 603. a second guide rotating arm; 7. a third lock head; 701. a third rotating arm; 702. a third lock cylinder sleeve; 703. a third guide rotating arm; 8. a lock case; 9. a T-shaped rotating arm; 901. a left horizontal part of the swivel arm; 902. a right horizontal part of the swivel arm; 903. a vertical part of the rotating arm; 10. an epoxy resin coating; 11. hinging; 12. bolt holes; 13. a high-strength bolt; 14. a rotating arm fixing shaft; 15. and (7) a pin shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, the FRP reinforced concrete structure civil air defense door is characterized in that: the door comprises a door frame 1, a first door body 2 and a linkage lock;

the door frame 1 is pre-embedded in a wall body, the first door body 2 is of an FRP (fiber reinforced plastic) reinforced concrete structure, and the outer surface of the first door body 2 is coated with an epoxy resin coating 10; because the steel construction in the FRP reinforced concrete structure civil air defense door structure outside easily receives external environment to corrode, consequently have epoxy at FRP reinforced concrete civil air defense door outside coating, prevent that FRP reinforced concrete civil air defense door outside steel construction from suffering the corruption. And the epoxy resin coating 10 should be changed regularly, the durability of the FRP reinforced concrete structure civil air defense door is ensured, and the frequent replacement of the FRP reinforced concrete structure civil air defense door caused by the corrosion of the steel structure outside the FRP reinforced concrete structure civil air defense door is avoided, so that the economic benefit is improved.

First door body 2 includes skeleton and a plurality of door plant, and the rectangle structure is constituteed in the concatenation of a plurality of door plants to the card is established inside the skeleton, is connected through concave-convex structure buckle between the adjacent door plant and between door plant and the skeleton.

The first door body 2 is hinged with the doorframe 1 through a first rotating shaft 21 and a hinge 11; high-strength bolts 13 pass through the bolt holes 12 to fix the hinge leaf 11 to the doorframe 1.

linkage shutting sets up in first door body 2 inboard, the linkage shutting includes: a fixed wheel, a steel wire rope 4 and a lock head group.

the fixed wheel comprises an inner fixed wheel 3, and the inner fixed wheel 3 is arranged on the inner side of the first door body 2 through a first rotating mechanism and is rotationally connected with the first door body 2; the first rotating mechanism includes: the lock sleeve is cylindrical and penetrates through and is fixed on the first door body 2; the lock shaft is rotatably arranged in the lock sleeve, extends out of the lock sleeve towards the interior of the first door body 2 and is provided with a lock shaft key groove along the axial direction of the lock shaft so as to be connected with the inner fixed wheel 3;

the lock head group comprises a first lock head 5, a third lock head 7 and a second lock head 6, the first lock head 5, the third lock head 7 and the second lock head 6 are respectively arranged at the upper part and the lower part of the inner side of the first door body 2 and the end part deviating from the hinge direction of the first door body 2 and the door frame 1, the end part deviating from the hinge direction of the first door body 2 and the door frame 1 is close to the opening of the civil air defense door, pin shafts 15 are respectively arranged at the corresponding positions, and the first lock head 5, the third lock head 7 and the second lock head 6 are respectively connected with the first door body 2;

Steel wire ropes 4 are respectively arranged between the inner fixed wheel 3 and the first lock head 5, between the third lock head 7 and between the inner fixed wheel and the second lock head 6, one ends of the steel wire ropes 4 are wound on the outer peripheral wall of the inner fixed wheel 3, and the other ends of the steel wire ropes respectively penetrate through pin shafts 15 of the lock head groups to be connected with the corresponding lock heads; when the inner fixed wheel 3 is rotated clockwise or anticlockwise, the inner fixed wheel 3 drives the steel wire rope 4 to be wound or unwound, and each lock head group is separated from or contacted with the corresponding lock box 8.

when the civil air defense door needs to be opened, the inner fixed wheel 3 is rotated clockwise to wind the steel wire rope 4, so that each lock head group is driven to rotate, and because the end, far away from the inner fixed wheel 3, of the steel wire rope 4 is hinged with the pin shaft 15, when the inner fixed wheel 3 winds the steel wire rope 4, the steel wire rope 4 is subjected to tensile force, and the lock head groups are separated from the corresponding lock boxes 8 respectively, so that the first door body 2 can be pushed, and the door body of the civil air defense door is opened; when the civil air defense door needs to be closed, the internal fixing wheel 3 rotates anticlockwise to unreel the steel wire rope 4, so that the lock head groups are respectively contacted with the corresponding lock boxes 8, then the first door body 2 is pushed, the door body is closed, the single door bodies of the civil air defense door can be closed together, and the closing time is saved.

The T-shaped rotating arm 9 is arranged between the inner fixed wheel 3 and each lock head group, the inner fixed wheel 3 is rotatably connected with each lock head group through the steel wire rope 4, the T-shaped rotating arm 9 comprises a rotating arm vertical part 903, a rotating arm left horizontal part 902 and a rotating arm right horizontal part 901, the rotating arm vertical part 903 of the rotating arm is arranged on the inner side of the first door body 2 in a rotating mode of rotating the rotating arm fixing shaft 14, the rotating arm left horizontal part 902 of the rotating arm is connected with one end of the steel wire rope 4 close to one side of the inner fixed wheel 3, and the rotating arm right horizontal part 901 is connected with one end of the steel wire rope 4.

The inner fixed wheel 3 comprises a fixed wheel sleeve, and the inner wall of the fixed wheel sleeve is axially sleeved and fixed on the lock shaft; the rotating wheel is fixed on the outer wall of the handle sleeve and is fixed with a plurality of rotating arms arranged along the radial direction of the rotating wheel. The rotating arms are uniformly arranged along the radial direction, and hollow fan-shaped arms are arranged among different rotating arms.

When the steel wire rope winding and unwinding device is used, an operator holds the rotating wheel by hand and assists the rotating arm to rotate to drive the fixed wheel sleeve to rotate, and the rotation of the inner fixed wheel 3 drives the steel wire rope 4 to wind or unwind.

The inner fixed wheel 3 is provided with a baffle 401 which protrudes from the inner ring of the inner fixed wheel 3 and is used for preventing the steel wire rope 4 from separating from the fixed wheel.

When interior tight pulley 3 rotates in order to carry out the rolling or unreel to wire rope 4, baffle 401 sets up and plays limiting displacement to wire rope 4 for wire rope 4 is on the periphery wall that the in-process of rolling or unreeling to the tight pulley lies in the tight pulley all the time, in order to reach and carry out spacing purpose to wire rope 4, thereby guarantees that wire rope 4 can be smooth rolling to interior tight pulley 3 on.

The tight pulley still includes outer fixing device, and the lock cover fixedly connected with outer fixing device is stretched out to the outside of the first door body 2 of first slewing mechanism's lock axial, and outer fixing device sets up in the outside of the first door body 2 through first slewing mechanism with the mode of winding the lock axle pivoted simultaneously with interior tight pulley 3.

The outer fixing device can be an outer fixed wheel and comprises a fixed wheel sleeve and a rotating wheel which have the same structure as the inner fixed wheel 3.

The external fixation device may also include: the inner wall of the handle sleeve is sleeved and fixed on the lock shaft along the axial direction of the handle sleeve; the operating arm is fixedly connected to the outer wall of the handle sleeve; the linkage arm is fixedly connected to the outer wall of the handle sleeve, and an included angle is formed between the linkage arm and the operation arm.

When the device is used, an operator rotates the operating arm to drive the handle sleeve to rotate, and then the linkage arm is driven to rotate, so that the outer fixing device rotates to drive the steel wire rope 4 to be wound or unwound.

In the same way, the inner fixed wheel 3 can also use the components which comprise the handle sleeve, the operating arm and the linkage arm and have the same structure with the outer fixed device and are used for clockwise or anticlockwise rotation according to the actual situation.

The first lock head 5 includes: a first lock head 5 sleeve 502, a first guide rotation arm 503 and a first rotation arm 501. First lock head 5 sleeve 502 is the tube-shape to set up on the medial surface of the first door body 2 through second slewing mechanism around the fixed axle pivoted mode, for example through a fixed axle of mounting on the first door body 2, the circumference outside of fixed axle is located to first lock head 5 sleeve 502 rotation cover, and second slewing mechanism includes promptly: the fixed shaft and the fixed part are different in composition according to different types of door leaves. For example, when the first door body 2 of the civil air defense door is of an FRP reinforced concrete structure, the fixing shaft is positioned on the inner side surface of the first door body 2 in a manner of penetrating through the FRP reinforced concrete door body, a nut and a gasket are screwed and matched with one end of the fixing shaft and the outer side of the sleeve 502 of the first lock head 5, and the other end of the fixing shaft is fixed with the fixing shaft through a bolt, namely the fixing piece is the nut and the gasket.

The first guiding rotation arm 503 is fixedly connected with the outer wall of the first lock head 5 sleeve 502, a long hole is formed in the axial direction of the first guiding rotation arm 503, during installation, a pin shaft 15 penetrates through the long hole, one end of the steel wire rope 4 penetrates through the pin shaft 15 to achieve rotation fit of the steel wire rope 4 and the first guiding rotation arm 503, and the pin shaft 15 can move along the length direction of the long hole under the action of external force.

The first rotating arm 501 is fixedly connected to the outer wall of the first lock head 5 sleeve 502, is driven by the first lock head 5 sleeve 502 to contact with or separate from the lock box 8, and forms an included angle with the first guiding rotating arm 503, and the included angle is preferably an obtuse angle.

The first rotation arm 501 may be different from the first guide rotation arm 503 only in that a through hole is formed in the first rotation arm 501 and a long hole is formed in the first guide rotation arm 503.

The second lock head 6, similar in structure to the first lock head 5, includes: the second lock cylinder sleeve 602 is cylindrical and is arranged on the inner side of the first door body 2 in a manner of rotating around a fixed shaft; the second guiding rotating arm 603 is fixedly connected with the outer wall of the second lock sleeve 602, a long hole is formed in the second guiding rotating arm 603 in the axial direction, and one end of the steel wire rope 4 penetrates through the pin shaft 15 to realize the rotating fit of the steel wire rope 4 and the second guiding rotating arm 603; the second rotating arm 601 is fixedly connected to an outer wall of the second lock sleeve 602, and is driven by the second lock sleeve 602 to contact or separate from the corresponding lock box 8, and an obtuse included angle is formed between the second rotating arm and the second guiding rotating arm 603.

The third lock head 7 includes: a third cylinder sleeve 702, which is cylindrical and is rotatably disposed around a fixed shaft inside the first door body 2; the third guiding rotating arm 703 is fixedly connected with the outer wall of the third lock sleeve 702, a long hole is formed in the axial direction of the third guiding rotating arm 703, and one end of the steel wire rope 4 penetrates through the pin shaft 15 to realize the rotating fit of the steel wire rope 4 and the third guiding rotating arm 703; the third rotating arm 701 is fixedly connected to the outer wall of the third lock sleeve 702, and is driven by the third lock sleeve 702 to contact or separate from the corresponding lock box 8, and an obtuse included angle is formed between the third rotating arm 701 and the third guiding rotating arm 703.

The second lock head 6 is positioned on one side which deviates from the hinging of the first door body 2 and the door frame 1 and is close to the opening of the civil air defense door compared with the first lock head 5 and the third lock head 7.

in addition, as an improvement of the invention, in the FRP reinforced concrete structure civil air defense door as described above, one end of the lock shaft, which is far from the inner fixed wheel 3 and is close to each lock head group, is rotatably sleeved with a bracket, the end of the bracket, which is far from the lock shaft, is connected with a lantern ring, the lantern ring is positioned outside the outer peripheral wall of the first rotating wheel, and the end of the steel wire rope 4 is wound on the inner fixed wheel 3 through the lantern ring. When internal fixation wheel 3 rotates in order to carry out the rolling or unreel to wire rope 4, the setting of the lantern ring plays limiting displacement to wire rope 4 for wire rope 4 is on the periphery wall that is located internal fixation wheel 3 all the time at the rolling or unreel to internal fixation wheel 3, in order to reach and carry out spacing purpose to wire rope 4, thereby guarantees that wire rope 4 can be smooth rolling to internal fixation wheel 3 on.

It should be understood that the above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents may be made in the technical solutions described in the foregoing embodiments, or some technical features may be substituted. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.