Detachable lifting hook for civil air defense door

Abstract

The utility model discloses a detachable lifting hook for a civil air defense door, and belongs to the technical field of civil air defense equipment, the detachable lifting hook comprises a civil air defense door body, a door frame is fixedly mounted on the outer ring of the civil air defense door body, an internal thread annular block is fixedly mounted in the door frame, the inner ring of the internal thread annular block is in threaded connection with an external thread plate, and a rotating handle is fixedly mounted on the top surface of the external thread plate; the bottom end of the external thread plate is fixedly connected with a rotating pressing block; when the civil air defense door body is installed, a rotating handle is pushed to rotate an external thread plate, a rotating pressing block rotates at an annular sliding rail, meanwhile, an extrusion disc is pressed downwards, the extrusion disc extrudes an extrusion block downwards, a first spring is compressed, meanwhile, the extrusion disc moves downwards, meanwhile, a lifting hook is linked to descend together, and the lifting hook is stored in an internal thread annular block; the symmetry plane, parallel to the in-out direction of the civil air defense door body, of the lifting hook and the symmetry plane, parallel to the in-out direction of the civil air defense door body, of the door frame are located in the same plane, and smooth installation of the civil air defense door body is facilitated.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of civil air defense equipment, and in particular to a detachable lifting hook for a civil air defense door. BACKGROUND

[0002] The civil air defense engineering is also called civil air defense work.

[0003] A patent file with the published announcement number CN208251960U provides a new anti-explosion civil air defense door body, which belongs to the technical field of civil air defense equipment. The new anti-explosion civil air defense door body comprises a steel door frame, a door leaf and a top plate. The steel door frame is connected with the door leaf through a hinge. The top plate is fixedly arranged on the door frame wall at the upper part of the steel door frame. Two locks are arranged on the door leaf. The locks are symmetrically arranged at the left and right edge positions of the door leaf. A lifting ring is arranged at the top of the door leaf. A lifting hook matched with the lifting ring is arranged on the top plate. A moving limiting device is arranged on the top plate. The moving limiting device comprises a first baffle and a second baffle. A sliding rod is fixedly arranged between the first baffle and the second baffle. The sliding rod is provided with threads on the surface and is provided with a limiting nut matched with the threads. A moving sleeve is further arranged on the sliding rod. The moving sleeve can move on the sliding rod. The lifting hook is fixedly arranged on a fixing piece. The fixing piece is welded with the moving sleeve. The problems of poor anti-explosion and sealing effect of the civil air defense door body, easy deformation due to self-weight and uncontrollable opening angle in the prior art are solved.

[0004] In actual use, the lifting hook is fixedly arranged on the door-shaped support, the height position of the lifting hook is not adjustable, and therefore it is difficult to align the symmetric plane of the lifting hook parallel to the in-out direction of the civil air defense door body with the symmetric plane of the door frame parallel to the in-out direction of the civil air defense door body during installation. Therefore, the application provides a detachable lifting hook for a civil air defense door. Content of the utility model

[0005] In view of the defects of the prior art, the application provides a detachable lifting hook for a civil air defense door, which overcomes the defects of the prior art and aims to solve the problems in the prior art.

[0006] To achieve the above object, the application provides the following technical scheme: A detachable hook for civil air defense door, comprising a civil air defense door body, a door frame is fixedly installed on the outer ring of the civil air defense door body, an internally threaded annular block is fixedly installed in the inner part of the door frame, an externally threaded plate is threadedly connected to the inner ring of the internally threaded annular block, a rotating handle is fixedly installed on the top surface of the externally threaded plate, a rotating pressing block is fixedly connected to the bottom end of the externally threaded plate, a pressing disc is arranged below the externally threaded plate, an annular sliding rail is formed in the top part of the pressing disc, the rotating pressing block is slidingly connected with the annular sliding rail, an installation block is fixedly installed on the middle part of the top end of the pressing disc, a hook is fixedly installed on the top end of the installation block, the hook penetrates through the externally threaded plate, a pressing block is fixedly connected to the bottom end of the pressing disc, a groove is formed in the top part of the civil air defense door body, a first spring is fixedly installed on the top part of the civil air defense door body at the groove, and the top end of the first spring abuts against the bottom end of the pressing block.

[0007] By adopting the above technical scheme, when the civil air defense door body is installed, the rotating handle is pushed to rotate the externally threaded plate, the rotating pressing block is rotated at the annular sliding rail and also presses down the pressing disc, the pressing disc presses down the pressing block, the first spring is compressed, at the same time, the pressing disc moves downward and the hook also moves downward, the hook is stored in the internally threaded annular block, the symmetric plane of the hook which is parallel to the access direction of the civil air defense door body is located in the same plane as the symmetric plane of the door frame which is parallel to the access direction of the civil air defense door body, and the civil air defense door body is smoothly installed.

[0008] As a preferred technical scheme of the application, two oppositely arranged second springs are fixedly connected to the inner part of the door frame and above the externally threaded plate, the ends of the two groups of second springs away from the door frame are fixedly installed with limiting blocks, and the bottom ends of the limiting blocks are in contact with the top ends of the externally threaded plate.

[0009] By adopting the above technical scheme, the limiting blocks are located above the externally threaded plate under the action of the second springs, the externally threaded plate is limited when it rises, when the hook is replaced, the two groups of second springs are pressed at the same time, the rising of the externally threaded plate is not limited, the hook and the up-down adjusting mechanism can be taken out, and the hook is conveniently replaced.

[0010] As a preferred technical scheme of the application, a telescopic guide rod is arranged in the first spring, the bottom end of the telescopic guide rod is fixedly installed on the inner wall of the civil air defense door body, and the telescopic end of the telescopic guide rod abuts against the bottom end of the pressing block.

[0011] By adopting the above technical scheme, the telescopic guide rod plays a guiding role in the telescopic process of the first spring, and the service life of the first spring is improved.

[0012] The top beam is fixedly installed with a lifting ring at the bottom, and the lifting ring is matched with the lifting hook.

[0013] By adopting the technical scheme, the lifting hook is connected with the lifting ring of the top beam when the civil air defense door body is installed, which is beneficial to the installation and maintenance of the civil air defense door body.

[0014] As a preferred technical solution of the present application, the outer surface of the lifting hook is coated with a rust-proof paint layer.

[0015] By adopting the technical scheme, the rust-proof paint layer can prevent the lifting hook from rusting as much as possible, which is beneficial to prolong the service life of the lifting hook.

[0016] As a preferred technical solution of the present application, the outer surface of the rotating handle is sleeved with an anti-skid and wear-resistant sleeve.

[0017] By adopting the technical scheme, when the user rotates the rotating handle, the anti-skid and wear-resistant sleeve increases the friction between the rotating handle and the user's hand, reduces the possibility of slipping, and improves the usability during use.

[0018] The beneficial effects of the present application are as follows:

[0019] 1. When the civil air defense door body is installed, the rotating handle is pushed to rotate the outer threaded plate, so that the rotating pressing block rotates at the annular slide rail and also presses the extrusion disc downward, the extrusion disc extrudes the extrusion block downward, the first spring is compressed, at the same time, the extrusion disc moves downward and the lifting hook moves downward at the same time, so that the lifting hook is stored in the inner threaded annular block, which is beneficial to the fact that the symmetric surface of the lifting hook parallel to the access direction of the civil air defense door body is located in the same plane as the symmetric surface of the door frame parallel to the access direction of the civil air defense door body, which helps the smooth installation of the civil air defense door body.

[0020] 2. The limiting block is located above the outer threaded plate under the action of the second spring, which plays a limiting role when the outer threaded plate rises, and at the same time, when the lifting hook is replaced, the two groups of second springs are extruded, so that the rising of the outer threaded plate is not limited, that is, the lifting hook and the up-down adjusting mechanism can be taken out, which is convenient for disassembly and replacement. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an installation structure diagram of the lifting hook of the present application;

[0022] Figure 2 It is Figure 1 It is an enlarged structure diagram of A in the middle;

[0023] Figure 3 It is a whole structure diagram of the present application.

[0024] In the figure: 1, the body of the civil air defense door; 2, the door frame; 3, the inner threaded annular block; 4, the outer threaded plate; 5, the rotating pressing block; 6, the extrusion disc; 7, the annular sliding rail; 8, the mounting block; 9, the lifting hook; 10, the extrusion block; 11, the rotating handle; 12, the groove; 13, the first spring; 14, the second spring; 15, the limiting block; 16, the telescopic guide rod; 17, the roof beam; 18, the lifting ring; 19, the anti-skid wear-resistant sleeve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] Reference Figures 1-3 A detachable lifting hook for a civil air defense door, comprising a civil air defense door body 1, a door frame 2 fixedly installed at the outer circle of the civil air defense door body 1, an inner threaded annular block 3 fixedly installed inside the door frame 2, an outer threaded plate 4 threadedly connected to the inner circle of the inner threaded annular block 3, a rotating handle 11 fixedly installed on the top surface of the outer threaded plate 4, a rotating pressing block 5 fixedly connected to the bottom end of the outer threaded plate 4, an extrusion disc 6 arranged below the outer threaded plate 4, an annular sliding rail 7 formed in the top of the extrusion disc 6, the rotating pressing block 5 and the annular sliding rail 7 being in sliding connection, a mounting block 8 fixedly installed at the top end of the extrusion disc 6, a lifting hook 9 fixedly installed at the top end of the mounting block 8 and penetrating through the outer threaded plate 4, an extrusion block 10 fixedly connected to the bottom end of the extrusion disc 6, a groove 12 formed in the top of the civil air defense door body 1, a first spring 13 fixedly installed at the top of the civil air defense door body 1 at the groove 12, and the top end of the first spring 13 abutting against the bottom end of the extrusion block 10. The first spring 13 has a telescopic guide rod 16 arranged inside, the bottom end of the telescopic guide rod 16 being fixedly installed on the inner wall of the civil air defense door body 1, and the telescopic end of the telescopic guide rod 16 abutting against the bottom end of the extrusion block 10.

[0027] When the civil air defense door body 1 is installed, the rotating handle 11 is pushed to rotate the outer threaded plate 4, the rotating pressing block 5 is rotated at the annular sliding rail 7 and also presses down the extrusion disc 6, the extrusion disc 6 presses down the extrusion block 10, the first spring 13 is compressed, at the same time, the extrusion disc 6 moves downward and the lifting hook 9 also moves downward, the lifting hook 9 is accommodated into the inner threaded annular block 3, the symmetry plane of the lifting hook parallel to the access direction of the civil air defense door body is located in the same plane as the symmetry plane of the door frame parallel to the access direction of the civil air defense door body, which is beneficial to the smooth installation of the civil air defense door body 1. The telescopic guide rod 16 plays a guiding role in the telescopic process of the first spring 13, which is beneficial to improving the service life of the first spring 13.

[0028] Reference Figures 1-3 The second spring 14 is arranged on the inner side of the door frame 2 and above the outer threaded plate 4. The second spring 14 is fixedly connected to the limiting block 15. The bottom end of the limiting block 15 is in contact with the top end of the outer threaded plate 4. The top of the air defense door body 1 is provided with a top beam 17. The bottom of the top beam 17 is fixedly connected to the lifting ring 18. The lifting ring 18 is matched with the lifting hook 9. The outer surface of the rotating handle 11 is sleeved with the anti-skid wear-resistant sleeve 19. The limiting block 15 is above the outer threaded plate 4 under the action of the second spring 14. The outer threaded plate 4 is limited when rising. When the lifting hook 9 is replaced, the two second springs 14 are pressed at the same time. The rising of the outer threaded plate 4 is not limited. The lifting hook 9 and the up-down adjusting mechanism can be taken out for convenient disassembly and replacement. When the air defense door body 1 is installed or repaired, the lifting hook 9 is connected to the lifting ring of the top beam for lifting and installing or repairing the air defense door. When the user rotates the rotating handle 11, the anti-skid wear-resistant sleeve 19 increases the friction between the rotating handle 11 and the user's hand, reduces the possibility of slipping, and improves the usability during use.

[0029] Reference Figure 1 The outer surface of the lifting hook 9 is coated with a rust-proof paint layer. The rust-proof paint layer can avoid rusting of the lifting hook 9 as much as possible, which is beneficial to prolong the service life of the lifting hook 9.

[0030] Working principle: when the air defense door body 1 is installed, the rotating handle 11 is pushed to rotate the outer threaded plate 4. The rotating pressure block 5 rotates at the ring-shaped sliding rail 7 and also presses the pressing disc 6 downward. The pressing disc 6 presses the pressing block 10 downward, so that the first spring 13 is compressed. At the same time, the pressing disc 6 moves downward and links the lifting hook 9 to move downward, so that the lifting hook 9 is accommodated in the inner threaded ring block 3. The symmetry plane of the lifting hook parallel to the access direction of the air defense door body is located in the same plane as the symmetry plane of the door frame parallel to the access direction of the air defense door body, which is beneficial to the smooth installation of the air defense door body 1. The limiting block 15 is above the outer threaded plate 4 under the action of the second spring 14. The outer threaded plate 4 is limited when rising. When the lifting hook 9 is replaced, the two second springs 14 are pressed at the same time. The rising of the outer threaded plate 4 is not limited. The lifting hook 9 and the up-down adjusting mechanism can be taken out for convenient disassembly and replacement.

[0031] When the air defense door body 1 is installed or repaired, the lifting hook 9 is connected to the lifting ring of the top beam for lifting and installing or repairing the air defense door.

[0032] At the same time, the telescopic guide rod 16 plays a guiding role in the extension and retraction process of the first spring 13, which is beneficial to prolong the service life of the first spring 13. The rust-proof paint layer can avoid rusting of the lifting hook 9 as much as possible, which is beneficial to prolong the service life of the lifting hook 9.

[0033] In addition, when the user rotates the rotating handle 11, the anti-skid wear-resistant sleeve 19 increases the friction between the rotating handle 11 and the user's hand, reduces the possibility of slipping, and improves the usability during use.

[0034] The above merely provides preferred embodiments of the present application but not for limiting the present application. Although the present application has been described in detail with reference to the foregoing embodiments, the skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A detachable hook for a civil air defense door, comprising a civil air defense door body (1), characterized in that, The outer ring of the civil air defense door body (1) is fixedly installed with a door frame (2), the inner part of the door frame (2) is fixedly installed with an internally-threaded annular block (3), the inner ring of the internally-threaded annular block (3) is threadedly connected with an externally-threaded plate (4), the top surface of the externally-threaded plate (4) is fixedly installed with a rotating handle (11), the bottom end of the externally-threaded plate (4) is fixedly connected with a rotating pressing block (5), the lower part of the externally-threaded plate (4) is provided with an extrusion disc (6), the top part of the extrusion disc (6) is provided with an annular sliding rail (7), and the rotating pressing block (5) is slidingly connected with the annular sliding rail (7), the top end of the extrusion disc (6) is fixedly installed with a mounting block (8), the top end of the mounting block (8) is fixedly installed with a lifting hook (9), the lifting hook (9) penetrates through the externally-threaded plate (4) and is arranged, the bottom end of the extrusion disc (6) is fixedly connected with an extrusion block (10), the top part of the civil air defense door body (1) is provided with a recess (12), the top part of the civil air defense door body (1) is fixedly installed with a first spring (13) at the recess (12), and the top end of the first spring (13) abuts against the bottom end of the extrusion block (10).

2. The detachable door hook for a civil defense door according to claim 1, wherein The inner part of the door frame (2) and above the externally-threaded plate (4) are fixedly connected with two oppositely arranged second springs (14), the ends, away from the door frame (2), of the two groups of second springs (14) are fixedly installed with limiting blocks (15), and the bottom end of the limiting block (15) is in contact with the top end of the externally-threaded plate (4).

3. The detachable door hook for a civil defense door according to claim 1, wherein The inner part of the first spring (13) is provided with a telescopic guide rod (16), the bottom end of the telescopic guide rod (16) is fixedly installed on the inner wall of the civil air defense door body (1), and the telescopic end of the telescopic guide rod (16) abuts against the bottom end of the extrusion block (10).

4. The detachable door hook for a civil defense door according to claim 1, wherein The top part of the civil air defense door body (1) is provided with a top beam (17), the bottom part of the top beam (17) is fixedly installed with a lifting ring (18), and the lifting ring (18) is matched with the lifting hook (9).

5. The detachable door hook for a civil defense door according to claim 1, wherein The outer surface of the lifting hook (9) is coated with a rust-proof paint layer.

6. The detachable door hook for a civil defense door according to claim 1, wherein The outer surface of the rotating handle (11) is sleeved with an anti-skid wear-resistant sleeve (19).

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