Civil air defense door reliable to close

Abstract

The utility model relates to a civil air defense door reliable in closing, which belongs to the technical field of civil air defense doors and comprises a civil air defense door frame, the front of the civil air defense door frame is rotatably connected with a civil air defense door plate through hinges, and the right side of the front of the civil air defense door plate is provided with a fixing mechanism. According to the civil air defense door reliable in closing, when the civil air defense door plate is closed and fixed to the front face of the civil air defense door frame, the civil air defense door plate is pushed to be attached to the front face of the civil air defense door frame 1, then a hand wheel rotates to drive a first threaded rod to rotate in a first fixing block and move rightwards, and inserting rods on the upper side and the lower side are driven to move rightwards; the right sides of the upper and lower side inserting rods are slidably inserted into the left side of the connecting block, at the moment, an inserting groove formed in the upper surface of the hand wheel is located in the lower side of the bottom end of the inserting pin, and then the bottom end of the inserting pin is slidably inserted into the inserting groove to limit and fix the hand wheel; the structural stability and the closing reliability of the civil air defense door plate can be improved by arranging the inserting rods on the upper and lower sides.

Description

Technical Field

[0001] This utility model relates to the field of civil defense door technology, specifically a civil defense door with reliable closure. Background Technology

[0002] Civil defense doors, also known as air defense doors, are the entrances and exits of civil defense protection projects. They are mainly used to provide people with access to protected areas during natural disasters such as war and earthquakes. The design and manufacture of civil defense doors must meet specific protection requirements to ensure that personnel safety can be effectively protected in emergency situations.

[0003] For example, Chinese patent CN211524590U discloses a type of air-raid shelter door that improves the reliability of closing. It includes a door frame and a door panel hinged to the door frame. A bracket extending along the width of the door panel is slidably connected to the door panel. A drive gear is rotatably connected to the bracket. A driven rack is meshed on the drive gear and slidably connected to the bracket. One end of the driven rack is provided with a bolt that can slide with the driven rack and be inserted into the door frame. The utility model has the effect of improving the reliability of the door panel after closing.

[0004] Although the aforementioned patent has the effect of improving the reliability of the door panel after closure, the structure of the air defense door in this patent is equipped with a single door bolt I, which generally results in poor structural stability and thus generally poor closure reliability, reducing its practicality. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a reliable closure air defense door, which has advantages such as improved structural stability and closure reliability. It solves the problem that the structure of an air defense door with a single bolt I has generally poor structural stability, which in turn results in generally poor closure reliability and reduced practicality.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a reliable closure air defense door, including an air defense door frame, an air defense door panel rotatably connected to the front of the air defense door frame via a hinge, a fixing mechanism provided on the right side of the front of the air defense door panel, and a reinforcing mechanism provided on the left side of the front of the air defense door frame;

[0007] The fixing mechanism includes a first fixing block, a first threaded rod, a handwheel, two plug-in rods, a connecting block, a second fixing block, a connecting rod, and a connecting assembly. The first fixing block is located on the right side of the front of the air-raid shelter door panel. The first threaded rod is threadedly connected to the inside of the first fixing block. The handwheel is located on the left side of the first threaded rod. The second fixing block is located on the right side of the front of the air-raid shelter door panel. Both plug-in rods are slidably connected to the inside of the second fixing block. The connecting rod is fixed on the opposite side of the upper and lower plug-in rods. The connecting rod is located on the left side of the second fixing block. The right side of the first threaded rod is rotatably connected to the left side of the connecting rod through a bearing.

[0008] By adopting this technical solution, the structural stability and closure reliability of the air defense door can be improved.

[0009] Furthermore, the connecting block is located on the right side of the front of the air-raid shelter door frame, and the outer sides of the right sides of the upper and lower plug rods are slidably inserted into the inner side of the left side of the connecting block.

[0010] By adopting this technical solution, the upper and lower plug rods can ensure structural stability.

[0011] Furthermore, the connecting assembly includes a connecting piece, a pin, and a slot. The connecting piece is located on the upper side of the left side of the first fixing block, the pin is located on the left side of the connecting piece, the slot is opened on the upper surface of the handwheel, and the bottom end of the pin is slidably inserted into the inside of the slot.

[0012] By adopting this technical solution, the handwheel can be limited and fixed through the connecting components.

[0013] Furthermore, the reinforcing mechanism includes a third fixing block, a rotating rod, a handle, two threaded cylinders, a first bevel gear, two second bevel gears, two second threaded rods, and a fixing assembly. The third fixing block is located on the left side of the front of the air-raid shelter door frame. The rotating rod is rotatably connected to the inside of the third fixing block via a bearing. The handle is located on the right side of the rotating rod. The first bevel gear is located on the outer side of the left side of the rotating rod. Both second bevel gears mesh with the outer side of the first bevel gear. The threaded cylinders are all fixed inside the second bevel gears. The second threaded rods are threadedly connected to the inside of the threaded cylinders.

[0014] By adopting this technical solution, the stability of the air-raid shelter door panel when closed on the front of the air-raid shelter door frame can be improved by strengthening the mechanism.

[0015] Furthermore, the fixing assembly includes two fourth fixing blocks, four telescopic cylinders, two connecting plates, two insert rods, and two insert blocks. The two fourth fixing blocks are fixed on the upper and lower sides of the front of the air-raid shelter door panel. The telescopic cylinders are rotatably connected to the inside of the fourth fixing blocks via bearings. The four telescopic cylinders are arranged on the left and right sides of the opposite side of the upper and lower fourth fixing blocks. The opposite side of the upper and lower telescopic cylinders is fixedly connected to the opposite side of the upper and lower connecting plates. The opposite sides of the upper and lower second threaded rods are fixedly connected to the opposite side of the upper and lower connecting plates. The two insert rods are fixed on the opposite side of the upper and lower connecting plates. The two insert blocks are arranged on the upper and lower sides of the front of the air-raid shelter door frame. The opposite sides of the upper and lower insert rods are slidably inserted into the inside of the opposite side of the upper and lower insert blocks.

[0016] By adopting this technical solution, the opposite sides of the upper and lower insert rods can be slidably inserted into the interior of the opposite side of the upper and lower insert blocks.

[0017] Furthermore, the telescopic cylinder includes a first slide cylinder, and a second slide cylinder is slidably connected inside the first slide cylinder.

[0018] By adopting this technical solution, the four telescopic cylinders can limit the movement of the second threaded rod on the upper and lower sides.

[0019] Furthermore, the upper and lower plug rods both move linearly left and right inside the second fixing block.

[0020] By adopting this technical solution, the interlocking rods on the upper and lower sides and the connecting blocks cooperate with each other to improve the stability of the closure.

[0021] Furthermore, the first fixing block is located on the horizontal central axis of the air-raid shelter door panel.

[0022] By adopting this technical solution, the stability of the first fixing block fixed to the front of the air-raid shelter door panel is improved.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] 1. This reliable closure of the air-raid shelter door involves closing and fixing the door panel to the front of the air-raid shelter door frame. Pushing the door panel makes it fit against the front of the air-raid shelter door frame 1. Then, rotating the handwheel drives the first threaded rod to rotate inside the first fixed block and move it to the right, causing the upper and lower plug-in rods to move to the right. The right sides of both the upper and lower plug-in rods slide into the left side of the connecting block. At this time, the slot on the upper surface of the handwheel is located below the bottom end of the pin. The bottom end of the pin slides into the slot to limit and fix the handwheel. By setting the upper and lower plug-in rods, the structural stability and the closure reliability of the air-raid shelter door panel can be improved.

[0025] 2. This reliable closure of the air-raid shelter door involves fixing the door panel to the front of the door frame, then rotating the handle to drive the rotating rod and the first bevel gear to rotate. The second bevel gears on the upper and lower sides rotate, causing the threaded cylinders on the upper and lower sides to rotate in opposite directions inside the fourth fixing blocks on the upper and lower sides. This causes the opposite side of the upper and lower insert rods to move and slide into the upper and lower insert blocks, thus improving the stability of the closure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the fixing mechanism of this utility model;

[0028] Figure 3 This is a three-dimensional structural diagram of the upper and lower side insertion rods of this utility model;

[0029] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0030] Figure 5 This is a schematic diagram of the reinforcing mechanism of this utility model.

[0031] In the diagram: 1. Air raid shelter door frame; 2. Air raid shelter door panel; 3. Fixing mechanism; 31. First fixing block; 32. First threaded rod; 33. Handwheel; 34. Insert rod; 35. Connecting block; 36. Second fixing block; 37. Connecting rod; 381. Connecting piece; 382. Pin; 383. Slot; 4. Reinforcing mechanism; 41. Third fixing block; 42. Rotating rod; 43. Handle; 44. Threaded cylinder; 45. First bevel gear; 46. Second bevel gear; 47. Second threaded rod; 481. Fourth fixing block; 482. Telescopic cylinder; 483. Connecting plate; 484. Insert rod; 485. Insert block. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figure 1 In this embodiment, a reliable closure air defense door includes an air defense door frame 1. The front of the air defense door frame 1 is rotatably connected to an air defense door panel 2 via a hinge. A fixing mechanism 3 is provided on the right side of the front of the air defense door panel 2. The fixing mechanism 3 improves the structural stability and closure reliability. A reinforcing mechanism 4 is provided on the left side of the front of the air defense door frame 1. The reinforcing mechanism 4 improves the closure stability.

[0034] Please see Figures 2 to 4 In order to improve structural stability and closure reliability, the fixing mechanism 3 in this embodiment includes a first fixing block 31, a first threaded rod 32, a handwheel 33, two plug-in rods 34, a connecting block 35, a second fixing block 36, a connecting rod 37, and a connecting assembly. The first fixing block 31 is located on the right side of the front of the air defense door panel 2, and the first threaded rod 32 is threadedly connected to the inside of the first fixing block 31.

[0035] In this embodiment, the handwheel 33 is located on the left side of the first threaded rod 32, the second fixing block 36 is located on the right side of the front of the air defense door panel 2, the two plug-in rods 34 are slidably connected inside the second fixing block 36, the connecting rod 37 is fixed on the opposite side of the upper and lower plug-in rods 34, the connecting rod 37 is located on the left side of the second fixing block 36, and the right side of the first threaded rod 32 is rotatably connected to the left side of the connecting rod 37 through a bearing.

[0036] In this embodiment, when the air-raid shelter door panel 2 is closed and fixed to the front of the air-raid shelter door frame 1, the air-raid shelter door panel 2 is pushed to make it fit against the front of the air-raid shelter door frame 1. Then, the handwheel 33 is rotated to drive the first threaded rod 32 to rotate inside the first fixing block 31 and move to the right, thereby driving the upper and lower plug-in rods 34 to move to the right.

[0037] In this embodiment, the connecting block 35 is located on the right side of the front of the air-raid shelter door frame 1. The outer sides of the right sides of the upper and lower side plug rods 34 are slidably inserted into the inner side of the left side of the connecting block 35. The connecting assembly includes a connecting piece 381, a pin 382, ​​and a slot 383. The connecting piece 381 is located on the upper side of the left side of the first fixing block 31. The pin 382 is located on the left side of the connecting piece 381. The slot 383 is opened on the upper surface of the handwheel 33. The bottom end of the pin 382 is slidably inserted into the inner side of the slot 383. The upper and lower side plug rods 34 move linearly left and right inside the second fixing block 36. The first fixing block 31 is located on the transverse central axis of the air-raid shelter door panel 2.

[0038] It should be noted that the right sides of the upper and lower plug rods 34 are slidably inserted into the interior of the left side of the connecting block 35. At this time, the slot 383 opened on the upper surface of the handwheel 33 is located below the bottom end of the pin 382. The handwheel 33 is then limited and fixed by sliding the bottom end of the pin 382 into the interior of the slot 383. By setting the upper and lower plug rods 34, the structural stability and the closing reliability of the air defense door panel 2 can be improved.

[0039] Please see Figure 5 To improve the stability of the closure, the reinforcing mechanism 4 in this embodiment includes a third fixing block 41, a rotating rod 42, a handle 43, two threaded cylinders 44, a first bevel gear 45, two second bevel gears 46, two second threaded rods 47, and a fixing assembly. The third fixing block 41 is located on the left side of the front of the air-raid shelter door frame 1. The rotating rod 42 is rotatably connected to the inside of the third fixing block 41 through a bearing. The handle 43 is located on the right side of the rotating rod 42. The first bevel gear 45 is located on the outside of the left side of the rotating rod 42. The two second bevel gears 46 are all meshed on the outside of the first bevel gear 45. The threaded cylinders 44 are all fixed inside the second bevel gears 46. The second threaded rods 47 are threadedly connected to the inside of the threaded cylinders 44.

[0040] In this embodiment, after the air defense door panel 2 is fixed to the front of the air defense door frame 1, the rotating handle 43 drives the rotating rod 42 and the first bevel gear 45 to rotate.

[0041] In this embodiment, the fixing assembly includes two fourth fixing blocks 481, four telescopic cylinders 482, two connecting plates 483, two insert rods 484, and two insert blocks 485. The two fourth fixing blocks 481 are fixed on the upper and lower sides of the front of the air-raid shelter door panel 2. The telescopic cylinders 482 are rotatably connected to the inside of the fourth fixing blocks 481 through bearings. The four telescopic cylinders 482 are arranged on the left and right sides of the opposite side of the upper and lower fourth fixing blocks 481.

[0042] In this embodiment, the opposite sides of the upper and lower telescopic cylinders 482 are fixedly connected to the opposite sides of the upper and lower connecting plates 483. The opposite sides of the upper and lower second threaded rods 47 are fixedly connected to the opposite sides of the upper and lower connecting plates 483. The two insert rods 484 are fixed to the opposite sides of the upper and lower connecting plates 483. The two insert blocks 485 are set on the upper and lower sides of the front of the air-raid shelter door frame 1. The opposite sides of the upper and lower insert rods 484 are slidably inserted into the interior of the opposite side of the upper and lower insert blocks 485. The telescopic cylinder 482 includes a first slide cylinder, and the second slide cylinder is slidably connected inside the first slide cylinder.

[0043] It should be noted that the second bevel gear 46 on the upper and lower sides rotates and drives the threaded cylinder 44 on the upper and lower sides to rotate in opposite directions inside the fourth fixed block 481 on the upper and lower sides. Then, the second threaded rod 47 on the upper and lower sides is limited by the four telescopic cylinders 482 and moves in opposite directions, driving the opposite side of the upper and lower insert rod 484 to move and slide into the interior of the upper and lower insert block 485, which can improve the stability of closure.

[0044] The working principle of the above embodiments is as follows:

[0045] (1) When the air defense door panel 2 is closed and fixed on the front of the air defense door frame 1, push the air defense door panel 2 to make the air defense door panel 2 fit against the front of the air defense door frame 1, and then rotate the handwheel 33 to drive the first threaded rod 32 to rotate inside the first fixed block 31 and move to the right, driving the upper and lower plug rods 34 to move to the right. The right sides of the upper and lower plug rods 34 are slidably inserted into the left side of the connecting block 35. At this time, the slot 383 opened on the upper surface of the handwheel 33 is located below the bottom end of the pin 382. Then, the handwheel 33 is limited and fixed by sliding the bottom end of the pin 382 into the slot 383. By setting the upper and lower plug rods 34, the structural stability and the reliability of closing the air defense door panel 2 can be improved.

[0046] (2) After fixing the air defense door panel 2 to the front of the air defense door frame 1, the rotating handle 43 drives the rotating rod 42 and the first bevel gear 45 to rotate. The second bevel gear 46 on the upper and lower sides rotates and drives the threaded cylinders 44 on the upper and lower sides to rotate in opposite directions inside the fourth fixing block 481 on the upper and lower sides. Then, the second threaded rods 47 on the upper and lower sides are limited by the four telescopic cylinders 482 and move in opposite directions, driving the opposite side of the upper and lower insert rods 484 to move and slide into the upper and lower insert blocks 485, which can improve the stability of closure.

Claims

1. A reliable closure for air defense doors, comprising an air defense door frame (1), characterized in that: The front of the civil defense door frame (1) is connected to the civil defense door panel (2) by a hinge. A fixing mechanism (3) is provided on the right side of the front of the civil defense door panel (2), and a reinforcing mechanism (4) is provided on the left side of the front of the civil defense door frame (1). The fixing mechanism (3) includes a first fixing block (31), a first threaded rod (32), a handwheel (33), two plug-in rods (34), a connecting block (35), a second fixing block (36), a connecting rod (37), and a connecting assembly. The first fixing block (31) is located on the right side of the front of the air-raid shelter door panel (2). The first threaded rod (32) is threadedly connected to the inside of the first fixing block (31). The handwheel (33) is located on the left side of the first threaded rod (32). The second fixing block (36) is located on the right side of the front of the air-raid shelter door panel (2). The two plug-in rods (34) are slidably connected to the inside of the second fixing block (36). The connecting rod (37) is fixed on the opposite side of the upper and lower plug-in rods (34). The connecting rod (37) is located on the left side of the second fixing block (36). The right side of the first threaded rod (32) is rotatably connected to the left side of the connecting rod (37) through a bearing.

2. The air-raid shelter door with reliable closure according to claim 1, characterized in that: The connecting block (35) is located on the right side of the front of the air defense door frame (1), and the outer side of the right side of the upper and lower plug rods (34) are slidably inserted into the inside of the left side of the connecting block (35).

3. A reliable closure air-raid shelter door according to claim 1, characterized in that: The connecting assembly includes a connecting piece (381), a pin (382), and a slot (383). The connecting piece (381) is located on the upper side of the left side of the first fixing block (31). The pin (382) is located on the left side of the connecting piece (381). The slot (383) is opened on the upper surface of the handwheel (33). The bottom end of the pin (382) is slidably inserted into the inside of the slot (383).

4. A reliable closure air-raid shelter door according to claim 1, characterized in that: The reinforcing mechanism (4) includes a third fixing block (41), a rotating rod (42), a handle (43), two threaded cylinders (44), a first bevel gear (45), two second bevel gears (46), two second threaded rods (47), and a fixing assembly. The third fixing block (41) is located on the left side of the front of the air-raid shelter door frame (1). The rotating rod (42) is rotatably connected to the inside of the third fixing block (41) via a bearing. The handle (43) is located on the right side of the rotating rod (42). The first bevel gear (45) is located on the outside of the left side of the rotating rod (42). The two second bevel gears (46) are all meshed on the outside of the first bevel gear (45). The threaded cylinders (44) are all fixed inside the second bevel gears (46). The second threaded rods (47) are threadedly connected to the inside of the threaded cylinders (44).

5. A reliable closure air-raid shelter door according to claim 4, characterized in that: The fixing assembly includes two fourth fixing blocks (481), four telescopic cylinders (482), two connecting plates (483), two insert rods (484), and two insert blocks (485). The two fourth fixing blocks (481) are fixed on the upper and lower sides of the front of the air-raid shelter door panel (2). The telescopic cylinders (482) are rotatably connected to the inside of the fourth fixing blocks (481) through bearings. The four telescopic cylinders (482) are all arranged on the left and right sides of the opposite side of the upper and lower fourth fixing blocks (481). (482) The opposite side of each of the two threaded rods (47) is fixedly connected to the opposite side of the upper and lower connecting plates (483). The opposite sides of the second threaded rods (47) are fixedly connected to the opposite side of the upper and lower connecting plates (483). The two insert rods (484) are fixed on the opposite side of the upper and lower connecting plates (483). The two insert blocks (485) are set on the upper and lower sides of the front of the air defense door frame (1). The opposite sides of the upper and lower insert rods (484) are slidably inserted into the interior of the opposite side of the upper and lower insert blocks (485).

6. A reliable closure air-raid shelter door according to claim 5, characterized in that: The telescopic cylinder (482) includes a first slide cylinder, and a second slide cylinder is slidably connected inside the first slide cylinder.

7. A reliable closure air-raid shelter door according to claim 1, characterized in that: The upper and lower plug rods (34) both move linearly left and right inside the second fixed block (36).

8. A reliable closure air-raid shelter door according to claim 1, characterized in that: The first fixing block (31) is located on the horizontal central axis of the air defense door panel (2).

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