Tunnel protective door with mechanical locking device

Abstract

The utility model relates to a tunnel protection door with a mechanical locking device. The tunnel protection door comprises a foundation door and an installation door frame. The protective door further comprises a locking mechanism, and the locking mechanism is installed on the installation door frame and used for conducting secondary locking on the protective door. The locking mechanism comprises a main rotating shaft, a main handle and an auxiliary handle; the main rotating shaft rotatably penetrates through the mounting door frame to be mounted, and the axial direction of the main rotating shaft is perpendicular to the plane where the doorsill is located; the main handle and the auxiliary handle are installed at the two ends of the main rotating shaft respectively. When the main rotating shaft is rotated until the main handle is located in the vertically downward direction, the auxiliary handle is located in the horizontal direction and extends into the mounting door frame; the main handle is longer than the auxiliary handle, and the auxiliary handle is located on the opening side of the protective door. A second locking mechanism is additionally arranged on an original protective door base structure, and the problem that a protective door is opened due to the fact that a disc lock of the protective door is locked back and is not locked in place is solved.

Description

Technical Field

[0001] This utility model relates to the field of railway tunnel disaster prevention and rescue technology, and in particular to a tunnel protection door equipped with a mechanical locking device. Background Technology

[0002] Railway tunnel disaster prevention and evacuation rescue protective doors are special door facilities installed inside railway tunnels to ensure tunnel safety, respond to various disasters, and facilitate evacuation and rescue. For example, in the event of a fire in a tunnel, due to the relatively enclosed space, fire and smoke can spread rapidly. Protective doors can block passageways during a fire, utilizing their excellent fire resistance to prevent the spread of fire and smoke to other areas, buying more time for evacuation and fire rescue, and ensuring the safety of personnel. Alternatively, during natural disasters such as rainstorms and mudslides, protective doors can prevent rainwater and mudslides from entering the tunnel, avoiding flooding or burial, and preventing damage to tracks and equipment within the tunnel, ensuring the normal operation of railway facilities. Some protective doors have only one turntable locking mechanism; others feature an embedded door frame, embedded in a 0.5-meter reinforced concrete partition wall, with a frame height of 2 meters and a width of 1.7 meters. The four corners of the door frame have 16mm diameter, 400mm long pre-embedded steel bars, and the frame is 23cm thick, cast integrally with the reinforced concrete partition wall. The door itself is 14cm thick. The vibration of the protective door under the piston wind load of the train inside the tunnel can cause it to unlock automatically. If the user fails to close the protective door properly, the door may open under the piston wind load, posing a safety hazard. If this is not detected in time, the consequences could be unimaginable.

[0003] The first approach involves pre-embedding bolts on the side partition wall of the power line to install reinforcing steel bars and tighten the protective door. This prevents the door from opening automatically when not fully locked, meeting emergency requirements for disaster prevention and evacuation. However, later on, when work teams use the protective door as a work passage, they cannot open it from the outside, affecting operations and failing to meet on-site requirements. A second approach involves pre-embedding U-shaped steel hooks on the guide side of the protective door and using chains to lock and tighten the door's turntable lock when it is locked. This allows for entry operations, but requires separate personnel to open the door when exiting, failing to meet emergency evacuation requirements. Adding a leveling pad to the turntable locking mechanism to increase friction resistance solves the problem of automatic locking when fully locked. However, later on, some protective doors cannot be opened or are not fully locked, and the opening force exceeds the design requirement of 80N, creating a safety hazard that renders some protective doors unusable for evacuation and rescue.

[0004] Furthermore, redesigning the tunnel safety door would require replacing too many locks, which would be too costly. Therefore, it is necessary to design a locking device to work with the existing tunnel safety door. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a tunnel safety door equipped with a mechanical locking device. This device uses a gravity rod connected to a locking rod, where the locking rod engages the safety door when the gravity rod rotates downwards, thus providing a secondary lock. This prevents the door lock from automatically falling off under gravity or jumping up under wind loads, failing to return to the locked state and causing the safety door to open. Specifically, the technical solution of this utility model to achieve the above objectives is as follows:

[0006] A tunnel safety door equipped with a mechanical locking device includes a base door and a door frame; it also includes:

[0007] A locking mechanism is provided and installed on the mounting door frame for secondary locking of the protective door;

[0008] The locking mechanism includes a main rotating shaft, a main handle, and a secondary handle; the main rotating shaft is rotatably mounted through the mounting door frame, and the axis of the main rotating shaft is perpendicular to the plane of the mounting door frame; the main handle and the secondary handle are respectively mounted at both ends of the main rotating shaft; when the main rotating shaft is rotated to the point where the main handle is in a vertically downward direction, the secondary handle is in a horizontal direction and extends into the interior of the mounting door frame; the main handle is longer than the secondary handle, and the secondary handle is located on the opening side of the protective door.

[0009] Furthermore, a rocker arm is provided on the main handle and the auxiliary handle respectively, and the rocker arm on the main handle and the auxiliary handle is located at the end that is not connected to the main rotation axis, and the axial direction of the rocker arm is parallel to the main rotation axis.

[0010] Furthermore, the crank handle includes an inner tube and an outer tube, the inner tube being fixedly connected to the handle, and the outer tube being rotatable on the inner tube.

[0011] Furthermore, a mounting pad is provided, wherein a through hole is formed in the center of the mounting pad, the diameter of which is larger than the diameter of the main rotating shaft, and the main rotating shaft passes through the through hole in the mounting pad; the mounting pad includes a large pad and a small pad, which are respectively fitted to the two side surfaces of the mounting door frame for installation; the large pad has a mounting hole and is fixedly installed on the mounting door frame by expansion screws.

[0012] Furthermore, a threaded hole is provided at one end of the auxiliary handle, and an external thread is provided at the end of the main rotating shaft to cooperate with the threaded hole. The auxiliary handle is threadedly connected to the main rotating shaft. The small pad is installed between the auxiliary handle and the mounting frame.

[0013] Furthermore, the mounting holes are respectively located above and below the through hole in the center of the large pad; when the expansion screw is installed in the mounting hole, a portion protrudes to the surface of the large pad to limit the main handle.

[0014] Furthermore, the main handle can rotate 180°; when rotated vertically downward and vertically upward, the portion protruding from the surface of the large pad is blocked by the expansion screw installed in the mounting hole.

[0015] Furthermore, the installation door frame or protective door is provided with rotation arrow markings and alignment arrow markings.

[0016] Furthermore, the rotating arrow mark, the alignment arrow mark, the main handle, and the sub-handle are all provided with a reflective coating.

[0017] When the protective door is open, the main handle 32 is vertically upward, while the auxiliary handle 33 is horizontally positioned at one end of the mounting frame 2. When the protective door is closed, rotating the main handle 32 180° from vertically upward to vertically downward causes the auxiliary handle 33 to rotate to the horizontal end of the protective door and block it. The main handle 32 is longer than the auxiliary handle 33, ensuring that the main handle 32 remains vertically downward under gravity. Even if its position changes, it will automatically return to its original position by gravity, thus ensuring that the auxiliary handle 33 always blocks the protective door. The reflective coating facilitates remote monitoring of the protective door lock's locking status. The mounting pad reduces the force exerted on the hands when installing the mounting frame 2.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] This utility model adds a second locking mechanism to the original protective door basic structure, which solves the problem of the protective door opening due to the disc lock not locking properly and the disc lock not locking properly. At the same time, the locking status of the protective door can be viewed in time through video monitoring. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the protective door of this utility model in use;

[0021] Figure 2 This is a schematic diagram of the protective door of this utility model from another angle in use;

[0022] Figure 3 This is a schematic diagram of the locking mechanism structure described in this utility model;

[0023] Figure 4 This is a schematic diagram of the locking mechanism described in this utility model from another angle.

[0024] Figure 5 This is an exploded view of the locking mechanism structure described in this utility model;

[0025] In the picture:

[0026] 1—Basic door, 2—Installation door frame, 3—Locking mechanism, 31—Main rotating shaft, 32—Main handle, 33—Secondary handle, 34—Crank handle, 35—Large pad, 36—Small pad, 37—Threaded hole, 38—External thread, 39—Expansion bolt. Detailed Implementation

[0027] like Figure 1-5 As shown, the embodiments of this utility model are as follows:

[0028] A tunnel protection door equipped with a mechanical locking device includes a base door 1, a mounting frame 2, and a locking mechanism 3.

[0029] A locking mechanism 3 is installed on the mounting door frame 2 for secondary locking of the protective door. The locking mechanism 3 includes a main rotating shaft 31, a main handle 32, a secondary handle 33, and a mounting plate. The main rotating shaft 31 is rotatably mounted through the mounting door frame 2, and its axis is perpendicular to the plane of the mounting door frame. The main handle 32 and the secondary handle 33 are respectively installed at both ends of the main rotating shaft 31. When the main rotating shaft 31 is rotated until the main handle 32 is in a vertically downward direction, the secondary handle 33 is in a horizontal direction and extends into the interior of the mounting door frame 2. The main handle 32 is longer than the secondary handle 33, and the secondary handle 33 is located on the open side of the protective door. A crank 34 is provided on both the main handle 32 and the secondary handle 33, and both cranks 34 are located at the end not connected to the main rotating shaft 31, with their axis parallel to the main rotating shaft 31. The crank 34 includes an inner tube and an outer tube; the inner tube is fixedly connected to the handle, and the outer tube can rotate on the inner tube.

[0030] The mounting plate has a 32mm diameter through hole in its center, larger than the diameter of the main rotating shaft 31, through which the main rotating shaft 31 passes. The mounting plate includes a large plate 35 and a small plate 36, which are respectively fitted to the two sides of the mounting door frame 2. The large plate 35 measures 15cm*15cm*0.8cm and has mounting holes on its surface, and is fixed to the mounting door frame 2 by expansion screws 39. One end of the auxiliary handle 33 has a threaded hole 37, and the end of the main rotating shaft 31 has an external thread 38 that mates with the threaded hole 37, allowing the auxiliary handle 33 to be threadedly connected to the main rotating shaft 31. The small plate 36 measures 6cm*6cm*0.6cm and is installed between the auxiliary handle 33 and the mounting door frame 2.

[0031] The mounting holes are located above and below the through hole in the center of the large pad 35, respectively. When the expansion screw 39 is installed in the mounting hole, a portion protrudes from the surface of the large pad 35 to limit the movement of the main handle 32. The main handle 32 can rotate 180°. When rotated vertically downward and vertically upward, it is blocked by the portion of the expansion screw 39 protruding from the surface of the large pad 35 when installed in the mounting hole.

[0032] The door frame 2 or the protective door is equipped with rotation arrow markings and alignment arrow markings. The rotation arrow markings, alignment arrow markings, main handle 32 and auxiliary handle 33 are all equipped with reflective coatings.

[0033] When the protective door is open, the main handle 32 is vertically upward, while the auxiliary handle 33 is horizontally positioned at one end of the mounting frame 2. When the protective door is closed, rotating the main handle 32 180° from vertically upward to vertically downward causes the auxiliary handle 33 to rotate to the horizontal end of the protective door and block it. The main handle 32 is longer than the auxiliary handle 33, ensuring that the main handle 32 remains vertically downward under gravity. Even if its position changes, it will automatically return to its original position by gravity, thus ensuring that the auxiliary handle 33 always blocks the protective door. The reflective coating facilitates remote monitoring of the protective door lock's locking status. The mounting pad reduces the force exerted on the hands when installing the mounting frame 2.

[0034] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A tunnel door provided with mechanical locking means, comprising a base door (1) and a mounting frame (2); characterized in that, Also include: Locking mechanism (3), the locking mechanism (3) is provided to be installed on the installation door frame (2), for the secondary locking of the protective door; The locking mechanism (3) includes a main rotating shaft (31), a main handle (32) and a secondary handle (33); the main rotating shaft (31) is rotatably installed through the installation door frame (2), and the main rotating shaft (31) is axially perpendicular to the plane where the installation door frame is located; the main handle (32) and the secondary handle (33) are respectively provided to be installed on both ends of the main rotating shaft (31); when the main rotating shaft (31) is rotated to the main handle (32) is located in the vertically downward direction, the secondary handle (33) is located in the horizontal direction and extends to the inside of the installation door frame (2); the main handle (32) is longer than the secondary handle (33), and the secondary handle (33) is located on the side of the opening of the protective door.

2. A tunnel door provided with mechanical locking means according to claim 1, characterized in that: The main handle (32) and the secondary handle (33) are respectively provided with a crank (34), and the crank (34) on the main handle (32) and the secondary handle (33) is arranged at an end not connected with the main rotating shaft (31), and the crank (34) is axially parallel to the main rotating shaft (31).

3. A tunnel door provided with mechanical locking means according to claim 2, characterized in that: The crank (34) includes an inner tube and an outer sleeve, the inner tube is fixedly connected with the handle, and the outer sleeve can rotate on the inner tube.

4. A tunnel door provided with a mechanical locking device according to claim 1, characterized in that: An installation backing plate is provided, a through hole is formed in the center of the installation backing plate, the diameter of the through hole is greater than the diameter of the main rotating shaft (31), and the main rotating shaft (31) penetrates through the through hole on the installation backing plate; the installation backing plate includes a large backing plate (35) and a small backing plate (36), and is respectively installed on the surfaces of both sides of the installation door frame (2); the large backing plate (35) is provided with a mounting hole, and is fixedly installed on the installation door frame (2) through an expansion screw (39).

5. A tunnel door provided with mechanical locking means according to claim 4, characterized in that: A threaded hole (37) is formed at one end of the secondary handle (33), an external thread (38) matched with the threaded hole (37) is arranged at the end of the main rotating shaft (31), and the secondary handle (33) is threadedly connected with the main rotating shaft (31); the small backing plate (36) is installed between the secondary handle (33) and the installation door frame (2).

6. A tunnel door provided with mechanical locking means according to claim 4, characterized in that: The mounting holes are respectively arranged above and below the through hole formed in the center of the large backing plate (35); when the expansion screw (39) is installed in the mounting hole, a part protruding to the surface of the large backing plate (35) is arranged, and the main handle (32) is limited.

7. A tunnel door provided with mechanical locking means according to claim 6, characterized in that: The rotatable angle of the main handle (32) is 180°; when rotated to vertically downward and vertically upward, the part protruding to the surface of the large backing plate (35) when the expansion screw (39) is installed in the mounting hole is blocked.

8. A tunnel door provided with mechanical locking means according to claim 1, characterized in that: Rotary arrow marks and alignment arrow marks are arranged on the installation door frame (2) or the protective door.

9. A tunnel door provided with mechanical locking means according to claim 8, characterized in that: Reflective coatings are arranged on the rotary arrow marks, the alignment arrow marks, the main handle (32) and the secondary handle (33).

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