Tunnel door

Abstract

The present application relates to the technical fields of tunnel protective door and discloses a tunnel protective door; the tunnel protective door comprises a door frame and a single door leaf hinged to the door frame, a door gap is formed between the bottom surface of the door leaf and the door frame, a locking mechanism is arranged on the door leaf to prevent the self-movement of the upper locking rod and the lower locking rod caused by the driving force of the first spring and the second spring after the door is opened, so that the insertion column is extended and interferes with the subsequent door closing operation; after the door is closed, the push rod and the push wheel automatically push the swing plate to reset and align, so that the insertion column cooperates with the upper locking rod to lock the protective door; the locking mechanism adopts pure mechanical automatic control, is reliable in work, and staff opening or closing the tunnel protective door does not need to additionally consider the locking mechanism, greatly reducing the operation difficulty. In addition, the sealing baffle mechanism seals the door gap of the tunnel protective door, solving the technical problem that the contaminating gas and dust easily enter the door hole through the door gap when the vehicle passes through the tunnel protective door.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel protective doors, and particularly relates to a tunnel protective door. BACKGROUND

[0002] With the rapid development of traffic construction in China, the number of tunnels of railways, highways and urban subways is increasing, and the length of the tunnels is also increasing. Equipment rooms for placing electrical equipment and escape exits are arranged in the tunnels. Protective doors are installed on the equipment rooms and escape exits. Safe and reliable door lock mechanisms need to be installed on the protective doors.

[0003] The existing protective doors mainly have the following problems: 1. There is a large gap between the bottom surface of the door leaf and the door frame. The tunnels are often arranged in mountains, underground or underwater, and thus have the characteristics of being narrow and long and being closed. When a railway train, a subway vehicle or a car passes through the tunnel under normal working conditions, a large amount of polluted gas and fine particles are generated. When the vehicle passes through the tunnel protective door, the polluted gas and dust are easily enter the door hole through the gap, which affects the air quality and equipment operation in the door hole; 2. The existing door lock structures are mostly provided in the style provided in the patent (CN 207144678). A worker rotates a hand wheel, and a lock rod is driven to be inserted into a lock hole of a door frame under the transmission of a gear and a rack to achieve locking of the protective door. In order to prevent the door lock structure from being self-unlocked after locking the protective door, a spring is generally sleeved on the lock rod. The spring and the door leaf cooperate to exert an action force on the lock rod toward the lock hole, so as to prevent the lock rod from moving. When the protective door needs to be opened, the lock rod needs to be unlocked. The worker rotates the hand wheel to drive the two lock rods to retract and separate from the lock hole. At this time, the spring is compressed. In order to prevent the lock rod from moving under the action of the spring force, a limiting mechanism needs to be arranged to limit the movement of the lock rod. The existing limiting mechanism generally adopts a ratchet structure. The structure is precise and complex, and it is difficult to debug. In the actual operation, the worker also needs to master certain skills to release the limitation of the limiting mechanism. The operation is troublesome.

[0004] It can be seen that the prior art still needs to be improved and improved. SUMMARY

[0005] In view of the above problems in the prior art, the present application aims to provide a tunnel protective door, which aims to solve at least one of the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] A tunnel protective door comprises a door frame and a single door leaf hinged to the door frame, a door gap being formed between the bottom surface of the door leaf and the door frame, the door leaf comprising a door frame and outer and inner protective plates respectively arranged on the front and rear sides of the door frame, a rotatable rotating shaft being arranged on the door frame, an outer hand wheel being arranged on the end of the rotating shaft facing outside the door, and an inner hand wheel being arranged on the end of the rotating shaft facing inside the door; characterized in that a bottom plate is vertically arranged on the door frame, the bottom plate being provided with vertically slidable upper and lower sliding strips, the top of the upper sliding strip being provided with a vertical upper locking rod, the bottom of the lower sliding strip being provided with a lower locking rod, the door frame being provided with an upper locking hole corresponding to the upper locking rod and a lower locking hole corresponding to the lower locking rod, the rotating shaft driving the upper and lower sliding strips to synchronously and reversely move through a transmission assembly; the door frame being provided with a first spring for driving the upper locking rod to move upwards, the door frame being provided with a second spring for driving the lower locking rod to move downwards, the top of the door frame being provided with an upper locking mechanism, the upper locking mechanism comprising a box body with a top cover and a bottom cover, a support plate being vertically fixed in the box body, a swing plate being swingably arranged on the support plate, a plug being arranged in the box body and vertically slidably extending out of the top cover, a push rod being arranged in the box body and extending out of the top cover at one end, and a lower pressing accessory being arranged above the top cover and guiding the push rod to move downwards; the upper locking rod penetrating through the bottom cover and being fixed to the bottom end of the plug, the lower pressing accessory being arranged on the door frame, and the box body being arranged on the door frame; the swing plate being provided with an elongated sliding hole and a clamping hole arranged beside the bottom of the elongated sliding hole, the plug being provided with a stop wheel matched with the elongated sliding hole and the clamping hole, the bottom cover being provided with a tension spring for pulling the swing plate to tilt so that the stop wheel can be clamped in the clamping hole; the push rod being provided with a push wheel beside the swing plate, the push wheel being used to press and push the swing plate to reset and align when the door leaf is closed, so that the elongated sliding hole extends vertically; the outer protective plate being provided with a sealing baffle mechanism for sealing the door gap.

[0008] As a further improvement of the above technical solution, the support plate is provided with a vertically extending guide groove and a limiting groove arranged above the guide groove, the edge of the limiting groove forming an inverted U-shaped curve, a convex shaft being arranged between the guide groove and the limiting groove and being rotationally connected with the swing plate, the upper part of the swing plate being arranged in the limiting groove, and a wing plate part being formed on the side of the swing plate close to the push wheel.

[0009] As a further improvement of the above technical solution, the lower pressing accessory comprises a top sheet, a lower pressing block integrally arranged at the bottom of the top sheet, and a locking screw, the lower pressing block being wedge-shaped and being provided with a guide inclined surface matched with the top end of the push rod, and the top sheet being provided with a mounting hole.

[0010] As a further improvement of the above technical solution, the sealing baffle mechanism comprises a transversely extending horizontal shaft, a sealing angle strip arranged below the horizontal shaft and extending transversely, and a driving device arranged at one end of the horizontal shaft, both ends of the horizontal shaft are arranged on the outer protective plate through the adapter seat, the inner corner of the sealing angle strip is fixedly provided with a flip block, the flip block is connected with the door body of the tunnel protective door through the hinge seat, the horizontal shaft is sleeved with a flip block and a rocker arm, the rocker arm is in the shape of "L", the rocker arm comprises a first U-shaped part, a vertically extending connecting rod and a second U-shaped part which are integrally formed from top to bottom in sequence, the first U-shaped part is hinged towards the rear and the flip block, the second U-shaped part is hinged towards the lower and the flip block, and the driving device is used to drive the horizontal shaft to rotate.

[0011] As a further improvement of the above technical solution, the driving device comprises a handle, a protective box with an upper opening and a universal joint coupler arranged in the protective box, the protective box is fixed on the outer protective plate, one end of the universal joint coupler extends out of the wall surface of the protective box and is in transmission connection with the end shaft, the other end of the universal joint coupler extends out of the wall surface of the protective box and is in transmission connection with the handle, and the rotation axis of the handle extends along the front-rear direction.

[0012] As a further improvement of the above technical solution, the transmission assembly comprises an elongated swing block sleeved on the rotating shaft, a first protruding column arranged at one end of the elongated swing block, and a second protruding column arranged at the other end of the elongated swing block, the upper sliding strip is provided with a first elongated slot matched with the first protruding column, the lower sliding strip is provided with a second elongated slot matched with the second protruding column, and the first elongated slot and the second elongated slot both extend transversely.

[0013] As a further improvement of the above technical solution, the inner hand wheel is connected with the rotating shaft in a key connection manner, the elongated swing block is connected with the rotating shaft in a key connection manner, the end of the rotating shaft towards the outside of the door is provided with a spring lock mechanism, the outer hand wheel is connected with the rotating shaft through the spring lock mechanism, and the spring lock mechanism can be unlocked by a key and a remote control structure.

[0014] As a further improvement of the above technical solution, the spring lock mechanism comprises an unlocking spring, a lock core, a sleeve sleeved at the tail of the lock core, and a movable pin arranged at the tail end of the lock core, the end of the lock core is provided with a countersunk hole for inserting the lock core, the unlocking spring is installed at the bottom of the countersunk hole and can push the head of the lock core out of the countersunk hole, and the rotating shaft is provided with an L-shaped slot limiting the activity range of the movable pin; the lock core can rotate relative to the sleeve, a sliding key is fixedly arranged on the outer wall of the sleeve, the rotating shaft is provided with a sliding groove guiding the sliding key to slide along the axial direction, the outer hand wheel is provided with a key groove matched with the sliding key, the L-shaped slot comprises an axial slot and a circumferential slot, and the end of the lock core towards the outside of the door can be twisted by the key.

[0015] As a further improvement of the above technical scheme, the remote control structure comprises a processor, a controller and a power supply module, an electromagnet and a reset device arranged on the door body, the processor is connected with the input end of the controller, the controller triggers work through a communication module, the rotating shaft is sleeved with an unlocking sleeve, the unlocking sleeve is connected with the electromagnet through a pull rod, one end of the pull rod is connected with the top end of the core shaft of the electromagnet, the other end of the pull rod is hinged with the swing plate part of the unlocking sleeve, the reset device is used for pulling the unlocking sleeve to reset, and the controller is electrically connected with the electromagnet; the power supply module is used for power supply of the controller and the electromagnet.

[0016] As a further improvement of the above technical scheme, the unlocking sleeve comprises a sleeve ring part, a swing plate part arranged on the sleeve ring part and an arc plate part arranged on the sleeve ring part, the arc plate part is used for pushing the movable pin in the circumferential groove to the axial groove; the reset device is a torsion spring, one end of the torsion spring is fixed on the swing plate part of the unlocking sleeve, and the other end is fixed on the door frame through a screw.

[0017] Beneficial effects:

[0018] Compared with the prior art, the tunnel protective door provided by the application avoids that the driving force of the first spring and the second spring drives the self-movement of the upper locking rod and the lower locking rod after the door is opened, so that the insertion column is stretched out and interferes with the subsequent door closing operation; after the door is closed, the push rod and the push wheel automatically push the swing plate to reset and align, so that the insertion column cooperates with the upper locking rod to lock the protective door; the upper locking mechanism adopts pure mechanical automatic control, which is reliable in work, and the operator does not need to additionally consider the upper locking mechanism when opening or closing the tunnel protective door, so that the operation difficulty is greatly reduced. In addition, the sealing baffle mechanism seals the door gap of the tunnel protective door, solves the technical problem that the contaminating gas and dust easily pass through the door gap into the door hole when the vehicle passes through the tunnel protective door, ensures the hygiene and cleanliness of the inside of the door hole, and also can avoid that the dense smoke generated by the fire passes through the door gap into the door hole, ensuring the life safety of the personnel in the door hole. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The figure is a perspective view of the tunnel protective door provided by the application.

[0020] Figure 2 The figure is a perspective view of the sealing baffle mechanism. Figure 1 .

[0021] Figure 3 The figure is a perspective view of the sealing baffle mechanism. Figure 2 .

[0022] Figure 4 The figure is a structural schematic view of the upper locking mechanism installed on the tunnel protective door.

[0023] Figure 5Isometric view of the locking mechanism, with the lower pressing fitting hidden.

[0024] Figure 6 Isometric view of the locking mechanism, with the lower pressing fitting hidden.

[0025] Figure 7 Schematic view of the locking mechanism when the tunnel protection door is opened

[0026] Figure 8 Schematic view of the locking mechanism when the tunnel protection door is opened

[0027] Figure 9 Schematic view of the internal structure of the tunnel protection door Figure 1 .

[0028] Figure 10 Schematic view of the internal structure of the tunnel protection door

[0029] Figure 11 Schematic view of the internal structure of the tunnel protection door Figure 2 .

[0030] Figure 12 Isometric view of the spring lock mechanism on the rotating shaft in the locked state Figure 11 .

[0031] Figure 13 Schematic view of the arrangement of the remote control structure

[0032] Figure 14 Isometric view of the spring lock mechanism on the rotating shaft in the locked state Figure 1 .

[0033] Figure 15 Isometric view of the spring lock mechanism on the rotating shaft in the locked state Figure 2 .

[0034] Figure 16 Isometric view of the spring lock mechanism on the rotating shaft in the unlocked state Figure 1 .

[0035] Figure 17 Isometric view of the spring lock mechanism on the rotating shaft in the unlocked state Figure 2 .

[0036] Figure 18 Schematic view of the internal structure of the spring lock mechanism in the locked state

[0037] Figure 19 Schematic view of the internal structure of the spring lock mechanism in the unlocked state DETAILED DESCRIPTION

[0038] The application provides a tunnel protection door. In order to make the purpose, technical scheme and effect of the application more clear and explicit, the application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the protection scope of the application.

[0039] Please refer to Figures 1-19 The application provides a tunnel protection door, which comprises a door frame 11 and a single door leaf 12 hinged to the door frame 11, and a door gap is formed between the bottom surface of the door leaf 12 and the door frame 11. The door leaf 12 comprises a door frame 121 and outer and inner protection plates 122 and 123 respectively arranged on the front and rear sides of the door frame 121. A rotating shaft 2 is arranged on the door frame 121. An outer hand wheel 13 is arranged at one end of the rotating shaft 2 facing outside the door. An inner hand wheel 14 is arranged at the other end of the rotating shaft 2 facing inside the door. A bottom plate 41 is vertically arranged on the door frame 121. The bottom plate 41 is provided with an upper sliding bar 42 and a lower sliding bar 43 which can vertically slide. The top of the upper sliding bar 42 is provided with an upper locking rod 44 which vertically extends. The bottom of the lower sliding bar 43 is provided with a lower locking rod 45. The door frame 11 is provided with an upper locking hole corresponding to the upper locking rod 44 and a lower locking hole corresponding to the lower locking rod 45. The rotating shaft 2 drives the upper and lower sliding bars 42 and 43 to synchronously and reversely move through a transmission assembly 46. The door frame 121 is provided with a first spring 47 for driving the upper locking rod 44 to move upwards. The door frame 121 is provided with a second spring 48 for driving the lower locking rod 45 to move downwards. The top of the door frame 121 is provided with an upper locking mechanism 3. The upper locking mechanism 3 comprises a box body 31 provided with a top cover 311 and a bottom cover 312, a support plate 32 vertically fixed in the box body 31, a swing plate 33 swingably arranged on the support plate 32, a plug column 34 arranged in the box body 31 and vertically slidably extending out of the top cover 311, a push rod 351 arranged in the box body 31 and extending out of the top cover 311 at one end, and a lower pressing accessory 36 arranged above the top cover 311 and guiding the push rod 351 to move downwards. The upper locking rod 44 penetrates through the bottom cover 312 and is fixed to the bottom end of the plug column 34. The box body 31 is arranged on the door frame 121. The swing plate 33 is provided with an elongated sliding hole 331 and a clamping hole 332 arranged beside the bottom of the elongated sliding hole 331. The plug column 34 is provided with a stop wheel 38 matched with the elongated sliding hole 331 and the clamping hole 332. The bottom cover 312 is provided with a tension spring 39 for pulling the swing plate 33 to tilt so that the stop wheel 38 can be clamped into the clamping hole 332. The push rod 351 is provided with a push wheel 352 arranged beside the swing plate 33. The push wheel 352 is used to press and reset the swing plate 33 to be in place when the door leaf 12 is closed, so that the elongated sliding hole 331 vertically extends. The outer protection plate 122 is provided with a sealing baffle mechanism 5 for sealing the door gap.

[0040] When the locking mechanism 3 is installed, the top cover 311 of the box body 31 is installed on the top of the door frame 121, the lower pressing accessory 36 is installed on the door frame 11 and located directly above the push rod 351, the long sliding hole 331 refers to a non-circular hole, which can be a rectangular hole, a waist-shaped hole, a rounded rectangular hole, etc. The clamping hole 332 is a circular hole matched with the stop wheel 38. The support plate 32 can be fixed on the box body 31 by screws 76 or gluing.

[0041] After the door leaf 12 is closed, the lower pressing accessory 36 drives the push rod 351 to move downward, the push wheel 352 on the push rod 351 presses downward to overcome the tension of the tension spring 39, and the swing plate 33 is swung to the right, not only converting the long sliding hole 331 from the inclined state to the vertical extension state, but also making the clamping hole 332 disengage from the stop wheel 38. At this time, the swing plate 33 is in a reset state, and the stop wheel 38 and the insertion column 34 can move up and down freely within the length of the long sliding hole 331. The operator rotates the outer handle 13 or the inner handle 14, which drives the upper locking rod 44 and the lower locking rod 45 to move away from the rotating shaft 2 through the transmission assembly 46, so that the insertion column 34 moves upward with the upper locking rod 44 to extend and insert into the lock hole on the door frame 11 to realize the locking operation. At this time, the stop wheel 38 is at the highest point, which can be referred to in detail in Figure 4 and Figure 8 . The first spring 47 cooperates with the door frame 121 to apply a force to the upper locking rod 44 toward the lock hole, thereby preventing the upper locking rod 44 and the insertion column 34 from being unlocked; the second spring 48 cooperates with the door frame 121 to apply a force to the lower locking rod 45 toward the lock hole, thereby preventing the lower locking rod 45 from being unlocked.

[0042] When the door leaf 12 is to be opened, the operator first rotates the outer handle 13 or the inner handle 14 to drive the upper locking rod 44 and the lower locking rod 45 to move toward the rotating shaft 2, and the insertion column 34 exits the lock hole and retracts into the box body 31 to realize the unlocking operation. At this time, the stop wheel 38 is at the lowest point, and the operator then opens the door leaf 12. Since the push rod 351 is disengaged from the lower pressing accessory 36 after the door is opened, the tension of the tension spring 39 on the swing plate 33 is greater than the downward pressure of the push wheel 352, and the tension spring 39 not only swings the swing plate 33 to the left, but also moves the push rod 351 and the push wheel 352 upward. At this time, the long sliding hole 331 is converted from the vertical extension state to the left inclined state, and then the stop wheel 38 is clamped into the clamping hole 332 on the swing plate 33, limiting the movement of the insertion column 34 and the upper locking rod 44, so as not to drive the upper locking rod 44 to move by the action of the first spring 47 after the door is opened, causing the insertion column 34 to extend and interfere with the subsequent door closing operation. For details, please refer to Figure 7 .

[0043] Compared with the prior art, the tunnel protection door provided by the application is provided with a locking mechanism 3, so that the force of the first spring 47 and the second spring 48 does not drive the upper locking rod 44 and the lower locking rod 45 to move and cause the insertion column 34 to interfere with the subsequent door closing operation. After the door is closed, the push rod 351 and the push wheel 352 automatically push the swing plate 33 to reset and align, so that the insertion column 34 cooperates with the upper locking rod 44 to lock the protection door. The locking mechanism 3 is automatically controlled in a pure mechanical mode and has high reliability. When the staff opens or closes the tunnel protection door, no additional processing of the locking mechanism 3 is required, and the operation difficulty is greatly reduced. In addition, the sealing baffle mechanism 5 seals the door gap of the tunnel protection door, solves the technical problem that the contaminating gas and dust easily enter the door hole through the door gap when the vehicle passes through the tunnel protection door, ensures the hygiene and cleanliness of the inside of the door hole, and can also prevent the dense smoke generated by the fire from entering the door hole through the door gap, and ensures the life safety of the personnel in the door hole.

[0044] Specifically, the guide groove 321 extending vertically is formed in the support plate 32, and the limiting groove 322 is arranged above the guide groove 321, the edge of the limiting groove 322 forms an inverted U-shaped curve, the convex shaft 323 connected with the swing plate 33 is arranged between the guide groove 321 and the limiting groove 322, the stop wheel 38 only moves up and down along the guide groove 321 to prevent the insertion column 34 from rotating, the swing plate 33 is determined to swing within a certain range by the limiting groove 322, and the displacement of the long sliding hole 331 and the clamping hole 332 is accurate, and the stop wheel 38 is well matched.

[0045] Further, the upper part of the swing plate 33 is installed in the limiting groove 322, and the wing plate part 334 is formed on one side of the swing plate 33 close to the push wheel 352. The swing plate 33 forms force conduction with the push wheel 352 through the wing plate part 334, the upper surface of the wing plate part 334 is an inclined surface, and the wing plate part 334 can always abut against the push wheel 352.

[0046] Further, the lower pressing accessory 36 includes a top sheet 361, a lower pressing block 362 integrally arranged at the bottom of the top sheet 361, and a locking screw 76, the lower pressing block 362 is wedge-shaped and is provided with a guide inclined surface 363 matched with the top end of the push rod 351, the guide inclined surface 363 can be in contact with the top end of the push rod 351, and the guide inclined surface 363 guides the movement of the push rod 351. When the door is closed, the top end of the push rod 351 slides to the bottom surface of the lower pressing block 362, and the lower pressing block 362 presses the push rod 351. The top sheet 361 is provided with a mounting hole 364, and the locking screw passes through the mounting hole 364 to install the lower pressing block 362 on the door frame 11.

[0047] Specifically, please refer to Figures 1-3The sealing baffle mechanism 5 comprises a transversely extending horizontal shaft 51, a sealing angle strip 52 arranged below the horizontal shaft 51 and extending transversely, and a driving device 53 arranged at one end of the horizontal shaft 51, both ends of the horizontal shaft 51 are arranged on the outer protective plate 122 through a conversion seat 57, a flip block 551 is fixedly arranged at an inner corner of the sealing angle strip 52, the flip block 551 is connected with the door body of the tunnel protective door through a hinge seat 552, a flip block 561 and a rocker arm 562 are sleeved on the horizontal shaft 51, the rocker arm 562 is in the shape of "L", the rocker arm 562 comprises a first U-shaped part 5621, a vertically extending connecting rod 5622 and a second U-shaped part 5623 which are integrally formed in sequence from top to bottom, the first U-shaped part 5621 is hinged towards the rear and with the flip block 561, the second U-shaped part 5623 is hinged towards the bottom and with the flip block 551, and the driving device 53 is used for driving the horizontal shaft 51 to rotate.

[0048] After the door leaf 12 is closed, the staff triggers the driving device 53 to drive the horizontal shaft 51 to rotate, and the sealing angle strip 52 is pulled down to press on the door frame 11 under the transmission of the flip block 561, the rocker arm 562 and the flip block 551, so as to seal the door gap of the tunnel protective door, thereby solving the technical problem that the contaminated gas and dust easily pass through the door gap to enter the inside of the door hole when the vehicle passes through the tunnel protective door, and ensuring the hygiene and cleanliness of the inside of the door hole. In addition, when a fire occurs in the tunnel, the dense smoke can also be prevented from entering the door hole through the door gap, thereby ensuring the life safety of the personnel in the door hole. When the door leaf 12 is to be opened, in order to prevent the sealing rubber strip 522 from scratching the door frame 11 and causing damage, at this time the staff first triggers the driving device 53 to drive the horizontal shaft 51 to rotate reversely, and the sealing angle strip 52 is pulled up to flip under the transmission of the flip block 561, the rocker arm 562 and the flip block 551, so that the sealing angle strip 52 is away from the door frame 11, and then the door leaf 12 is opened.

[0049] Specifically, the driving device 53 comprises a handle 534, a protective box 531 with an upper opening and a universal joint coupling 532 arranged in the protective box 531, the protective box 531 is fixed on the outer protective plate 122, one end of the universal joint coupling 532 extends out of the wall surface of the protective box 531 and is in transmission connection with the end shaft 512, the other end of the universal joint coupling 532 extends out of the wall surface of the protective box 531 and is in transmission connection with the handle 534, the rotation axis of the handle 534 extends along the front-rear direction, and the handle 534 is rotatably arranged on the protective box 531.

[0050] When sealing the door gap, the worker turns the handle 534 to the right. The handle 534 drives the horizontal shaft 51 to rotate through the universal joint coupling 532. Under the transmission of the flipping block 561, rocker arm 562, and tilting block 551, the sealing corner strip 52 is pressed down, sealing the gap of the tunnel protective door. This allows the sealing baffle mechanism 5 to quickly switch to the sealed state, which is convenient and reliable. When it is necessary to release the seal, the sealing baffle mechanism 5 is switched to the open state. The worker only needs to turn the handle 534 to the left. The handle 534 drives the horizontal shaft 51 to rotate through the universal joint coupling 532. Under the transmission of the flipping block 561, rocker arm 562, and tilting block 551, the sealing corner strip 52 is flipped upward, which is also convenient and reliable.

[0051] Existing technologies employ gears and racks as transmission components 46. However, the high precision required for gear and rack transmission structures increases production costs and manufacturing difficulty. Furthermore, gears and racks require regular lubrication and maintenance to ensure smooth operation in harsh tunnel environments, resulting in high maintenance costs. Therefore, this invention provides an embodiment of the transmission component 46, which includes an elongated swing block 461 sleeved on a rotating shaft 2, a first protrusion 462 at one end of the elongated swing block 461, and a second protrusion 463 at the other end of the elongated swing block 461. The upper slide bar 42 has a first elongated groove 464 that mates with the first protrusion 462, and the lower slide bar 43 has a second elongated groove 465 that mates with the second protrusion 463. Both the first and second elongated grooves 464 and 465 extend laterally; that is, the first and second elongated grooves 464 and 465 can be rectangular holes, oblong holes, rounded rectangular holes, etc.

[0052] When locking the tunnel safety door, the worker first closes the door, then turns the inner handwheel 14 or the outer handwheel 13 to drive the rotating shaft 2 and the elongated swing block 461 to rotate (to... Figure 10 Based on the perspective shown in the image, the rotating shaft 2 and the elongated swing block 461 rotate counterclockwise, thereby driving the upper sliding bar 42 and the lower sliding bar 43 to move synchronously and in opposite directions. The upper sliding bar 42 rises, causing the upper locking rod 44 to rise, so that the top end of the upper locking rod 44 inserts into the lock hole of the door frame 11. The lower sliding bar 43 falls, causing the lower locking rod 45 to fall, so that the bottom end of the lower locking rod 45 inserts into the lock hole of the door frame 11, thus locking the tunnel protective door. The transmission is smooth, the processing precision requirements are low, and the connection between the elongated swing block 461 and the upper sliding bar 42 / lower sliding bar 43 can form good conditions without adding lubricating oil, greatly improving the maintenance cycle. Personnel can unlock the tunnel protective door by operating the inner handwheel 14 or the outer handwheel 13, and then open the door.

[0053] The long swing block 461 can be rectangular or waist-shaped, and can be formed by casting, which is low in processing cost. The upper slide 42 and the lower slide 43 can be angle strips, which are cut from angle iron 521, and are convenient to process.

[0054] To ensure smooth movement of the upper slide 42 and the lower slide 43 and prevent deviation, the bottom plate 41 is provided with a plurality of guide strips 40 for guiding the sliding of the upper slide 42 and the lower slide 43. The guide strips 40 are provided with cover plates 49, which can prevent dust in the tunnel from polluting the transmission assembly 46 and affecting the normal movement of the transmission assembly 46.

[0055] Preferably, the inner handle 14 is connected to the rotating shaft 2 in a key connection manner, and the long swing block 461 is connected to the rotating shaft 2 in a key connection manner. The end of the rotating shaft 2 towards the outside of the door is provided with a spring lock mechanism 6, and the outer handle 13 is connected to the rotating shaft 2 through the spring lock mechanism 6, so that the outer handle 13 and the rotating shaft 2 are linked. It can be understood that if the spring lock mechanism 6 is in a locked state, even if the staff rotates the outer handle 13, the rotating shaft 2 is stationary and cannot lock or unlock the tunnel protective door. When the spring lock mechanism 6 is in an unlocked state, the rotating shaft 2 and the outer handle 13 can be connected in a key connection manner.

[0056] In actual application, the spring lock mechanism 6 is arranged on the rotating shaft 2 to prevent unauthorized personnel from entering the equipment room. The outer handle 13 and the rotating shaft 2 can be linked only after the spring lock mechanism 6 is unlocked. If the spring lock mechanism 6 is in a locked state, there is no transmission connection between the outer handle 13 and the rotating shaft 2, and even if the outer handle 13 is rotated, the rotating shaft 2 is still stationary. However, the key to open the spring lock mechanism 6 is generally kept in the superior department or the tunnel monitoring center. If an emergency occurs and the personnel in the tunnel need to immediately enter the equipment room, the key cannot be immediately sent to the site, which delays the time to enter the equipment room. Therefore, the spring lock mechanism 6 can be unlocked by the key and also by the remote control structure 7.

[0057] Specifically, the spring lock mechanism 6 comprises an unlocking spring 621, a lock cylinder 622, a sleeve 623 sleeved on the tail of the lock cylinder 622, and a movable pin 624 arranged at the tail end of the lock cylinder 622. The end of the lock cylinder 622 is provided with a countersunk hole 212 for inserting the lock cylinder 622. The unlocking spring 621 is installed at the bottom of the countersunk hole 212 and can push the head of the lock cylinder 622 to protrude out of the countersunk hole 212. The rotating shaft 2 is provided with an L-shaped slot 211 for limiting the movement range of the movable pin 624. The lock cylinder 622 can rotate relative to the sleeve 623. The outer wall of the sleeve 623 is fixedly provided with a sliding key 625. The rotating shaft 2 is provided with a sliding groove 213 for guiding the sliding key 625 to slide in the axial direction. The outer handle 13 is provided with a key groove 131 matched with the sliding key 625. In this way, the movable pin 624 can penetrate through the peripheral wall of the rotating shaft 2 and be exposed outside. The movable pin 624 can be turned by pushing it from the outside, so as to rotate the rotating shaft 2 to achieve unlocking, which better matches the remote unlocking operation. The L-shaped slot 211 comprises an axial slot position 2111 and a peripheral slot position 2112. The end of the lock cylinder 622 facing outside the door can be turned by a key.

[0058] Further, the lock cylinder 622 comprises a multi-prism head 6221, a limiting block 6222, a large mandrel segment 6223 and a small mandrel segment 6224 connected in sequence. The diameter of the limiting block 6222 is larger than that of the large mandrel segment 6223. The diameter of the large mandrel segment 6223 is larger than that of the small mandrel segment 6224. The sleeve 623 is sleeved on the small mandrel segment 6224. The tail of the small mandrel segment 6224 is provided with a insertion hole connected with the movable pin 624. The movable pin 624 limits the sleeve 623 from sliding out of the small mandrel segment 6224. The end of the small mandrel segment 6224 abuts against the unlocking spring 621. The multi-prism head 6221 can be a three-prism head, a four-prism head or a six-prism head. When the spring lock mechanism 6 is in the locking state, the multi-prism head 6221 hides in the countersunk cavity of the countersunk hole 212. Only the personnel with the key can turn the lock cylinder 622, so that the multi-prism head 6221 of the lock cylinder 622 pops out of the countersunk hole 212, thereby completing the unlocking of the spring lock mechanism 6.

[0059] The working principle of the key opening the spring lock mechanism 6 is briefly described as follows: when the spring lock mechanism 6 is in the locked state, the movable pin 624 is in the circumferential groove position 2112 of the L-shaped groove 211, at this time the multi-prism head 6221 of the lock cylinder 622 hides in the countersunk cavity of the countersunk hole 212, the sliding key 625 is away from the key groove 131 on the outer handle 13, so that the outer handle 13 cannot form a transmission connection with the rotating shaft 2, even if the staff rotates the outer handle 13, the rotating shaft 2 is also stationary, and the tunnel protective door cannot be locked or unlocked. When the spring lock mechanism 6 is to be opened, the staff butts the multi-prism head 6221 of the lock cylinder 622 with the key, and then can twist the lock cylinder 622, the lock cylinder 622 rotates relative to the sleeve 623, and the movable pin 624 swings to the port of the axial groove position 2111 of the L-shaped groove 211. At this time, the unlocking spring 621 forms a tendency to push the lock cylinder 622 out of the door, but at this time the sliding key 625 may not be aligned with the key groove 131, and the outer handle 13 will hinder the movement of the sliding key 625, and the staff needs to rotate the outer handle 13 to align the key groove 131 with the sliding key 625. When the key groove 131 is aligned with the sliding key 625, the lock cylinder 622 is pushed out of the countersunk hole 212 under the elastic force of the unlocking spring 621, the sliding key 625 also slides into the key groove 131, so that the outer handle 13 and the rotating shaft 2 form a key connection; finally, the staff rotates the outer handle 13 according to the switch direction mark on the door body, and the tunnel protective door can be locked or unlocked.

[0060] Please refer to Figures 11-19 In another unlocking mode of the spring lock mechanism 6, the remote control structure 7 includes a processor, a controller 71 and a power supply module, an electromagnet 73 and a reset device arranged on the door body, the processor is connected with the input end of the controller 71, the controller 71 is triggered to work through a communication module, the rotating shaft 2 is sleeved with an unlocking sleeve 72, the unlocking sleeve 72 is connected with the electromagnet 73 through a pull rod 74, one end of the pull rod 74 is connected with the top end of the core shaft of the electromagnet 73, the other end of the pull rod 74 is hinged with the swing plate part 722 of the unlocking sleeve 72, the reset device is used for resetting the unlocking sleeve 72, and the controller 71 is electrically connected with the electromagnet 73; the power supply module is used for power supply of the controller 71 and the electromagnet 73.

[0061] Specifically, the unlocking sleeve 72 comprises a collar portion 721, a swing plate portion 722 arranged on the collar portion 721, and an arc plate portion 723 arranged on the collar portion 721, the arc plate portion 723 is used to push the movable pin 624 in the circumferential groove position 2112 to the axial groove position 2111; the reset device is a torsion spring 75, one end of the torsion spring 75 is fixed on the swing plate portion 722 of the unlocking sleeve 72, and the other end is fixed on the door frame 121 through a screw 76.

[0062] The following is a brief description of the working principle of the remote opening of the spring lock mechanism 6: when the spring lock mechanism 6 is in the locked state, the movable pin 624 is in the circumferential groove position 2112 of the L-shaped groove 211, the sliding key 625 is away from the key groove 131 on the outer handle 13, so that the outer handle 13 cannot form a transmission connection with the rotating shaft 2, even if the staff rotates the outer handle 13, the rotating shaft 2 is also stationary, and the tunnel protective door cannot be locked or unlocked. When the communication module sends an unlocking signal to the controller 71, the core shaft of the electromagnet 73 is switched from the extended state to the retracted state, the unlocking sleeve 72 is driven to rotate through the pull rod 74, the unlocking sleeve 72 pushes the movable pin 624 from the circumferential groove position 2112 of the L-shaped groove 211 to the port of the axial groove position 2111 of the L-shaped groove 211, and due to the lack of obstruction of the movable pin 624, the unlocking spring 621 forms a tendency to push the lock cylinder 622 outward, but at this time the sliding key 625 may not be aligned with the key groove 131, and the outer handle 13 will hinder the movement of the sliding key 625, and the staff needs to rotate the outer handle 13 to align the key groove 131 with the sliding key 625. When the key groove 131 is aligned with the sliding key 625, the lock cylinder 622 is moved to the other port of the axial groove position 2111 of the L-shaped groove 211 under the action of the elastic force of the unlocking spring 621, and the sliding key 625 is also moved to the key groove 131, so that the outer handle 13 and the rotating shaft 2 form a key connection; finally, the staff rotates the outer handle 13 according to the switch direction mark on the door body, and the tunnel protective door can be unlocked.

[0063] In one embodiment, the communication module comprises a wireless communication unit, a smart terminal and a cloud server, the cloud server is connected with the controller 71 through the wireless communication unit, and the smart terminal is connected with the cloud server through the wireless communication unit. The smart terminal can be a smart phone or a computer, etc. The personnel in the tunnel control the APP in the smart terminal, send an unlocking request to the cloud server through the wireless communication unit, the cloud server authorizes the unlocking permission, and then sends an unlocking signal to the controller 71 through the wireless communication unit, so that the controller 71 controls the drive mechanism and the unlocking sleeve 72 to unlock the spring lock mechanism 6.

[0064] The wireless communication unit can adopt one or more of wifi wireless communication network, Bluetooth and 3G / 4G communication network.

[0065] In another embodiment, the communication module comprises a talkback and a control button, the control button is arranged in the tunnel monitoring center and is electrically connected with the controller 71. The personnel in the tunnel can talk with the technician in the tunnel monitoring center through the talkback to obtain the unlocking permission of the tunnel protection door. The technician triggers the control button to send an unlocking signal to the controller 71, and then the controller 71 controls the driving mechanism and the unlocking sleeve 72 to unlock the spring lock mechanism 6.

[0066] Preferably, the power supply module can adopt a primary battery or a storage battery, and the power supply module is arranged on the door frame 121.

[0067] When the spring lock mechanism 6 is closed, only the key can be used to push the polygonal head 6221 of the lock core 622 back into the countersunk cavity of the countersunk hole 212, and the lock core 622 is screwed to rotate the movable shaft from the axial slot position 2111 of the L-shaped slot 211 to the circumferential slot position 2112 of the L-shaped slot 211.

[0068] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0069] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] It can be understood that for those skilled in the art, equivalent replacement or change can be made according to the technical solutions and inventive concepts of the present application, and all such changes or replacements shall fall within the protection scope of the present application.

Claims

1. A tunnel safety door, comprising a door frame and a single door leaf hinged to the door frame, wherein a door gap is formed between the bottom surface of the door leaf and the door frame, the door leaf comprising a door frame and outer protective plates and inner protective plates respectively disposed on the front and rear sides of the door frame, wherein a rotatable pivot is provided on the door frame, an outer handwheel is provided at the end of the pivot facing outwards, and an inner handwheel is provided at the end of the pivot facing inwards; characterized in that, A base plate is vertically mounted on the gantry. The base plate has an upper sliding bar and a lower sliding bar that can slide vertically. A vertical upper locking rod is located at the top of the upper sliding bar, and a lower locking rod is located at the bottom of the lower sliding bar. The gantry frame has upper locking holes corresponding to the upper locking rods and lower locking holes corresponding to the lower locking rods. The rotating shaft drives the upper and lower sliding bars to move synchronously and in opposite directions via a transmission assembly. A first spring is installed on the gantry to drive the upper locking rod upwards, and a second spring is installed on the gantry to drive the lower locking rod downwards. A locking mechanism is installed at the top of the gantry. The locking mechanism includes a box with a top cover and a bottom cover, a support plate vertically fixed in the box, a swing plate that can swing left and right on the support plate, and a vertically sliding extension mechanism located inside the box. The top cover has an insert post, a push rod located inside the box and extending one end out of the top cover, and a pressing accessory located above the top cover to guide the push rod downwards; the upper locking rod passes through the bottom cover and is fixedly connected to the bottom end of the insert post; the pressing accessory is installed on the door frame; the box is installed on the door frame; the swing plate has an elongated sliding hole and a locking hole located beside the bottom of the elongated sliding hole; the insert post is provided with a stop wheel that cooperates with the elongated sliding hole and the locking hole; the bottom cover is provided with a tension spring for pulling the swing plate to tilt so that the stop wheel can engage with the locking hole; the push rod is provided with a push wheel located beside the swing plate; the push wheel is used to press down and push the swing plate to reset and straighten when the door is closed, so that the elongated sliding hole extends vertically; the outer protective plate is provided with a sealing baffle mechanism for sealing the door gap.

2. The tunnel protection door according to claim 1, characterized in that, The support plate has a vertically extending guide groove and a limiting groove above the guide groove. The edge of the limiting groove forms an inverted U-shaped curve. A convex shaft that is rotatably connected to the swing plate is provided between the guide groove and the limiting groove. The upper part of the swing plate is installed in the limiting groove. The side of the swing plate near the push wheel protrudes to form a wing plate.

3. The tunnel protection door according to claim 1, characterized in that, The pressing accessory includes a top plate, a pressing block integrally set at the bottom of the top plate, and a locking screw. The pressing block is wedge-shaped and has a guide slope that engages with the top of the push rod. The top plate has mounting holes.

4. The tunnel protection door according to claim 1, characterized in that, The sealing baffle mechanism includes a horizontally extending horizontal shaft, a sealing corner strip located below the horizontal shaft and extending horizontally, and a driving device located at one end of the horizontal shaft. The two ends of the horizontal shaft are mounted on the outer protective plate via adapter seats. A swing block is fixed at the inner corner of the sealing corner strip. The swing block is connected to the door body of the tunnel protective door via a hinge seat. A flipping block and a rocker arm are sleeved on the horizontal shaft. The rocker arm is "L"-shaped and includes a first U-shaped part integrally formed from top to bottom, a vertically extending connecting rod, and a second U-shaped part. The first U-shaped part faces backward and is hinged to the flipping block, and the second U-shaped part faces downward and is hinged to the swing block. The driving device is used to drive the horizontal shaft to rotate.

5. The tunnel protection door according to claim 4, characterized in that, The drive device includes a handle, a protective box with an upper opening, and a universal joint coupling disposed in the protective box. The protective box is fixed to the outer protective plate. One end of the universal joint coupling extends out of the wall of the protective box and is connected to the end shaft for transmission. The other end of the universal joint coupling extends out of the wall of the protective box and is connected to the handle for transmission. The rotation axis of the handle extends in the front-back direction.

6. The tunnel protection door according to claim 1, characterized in that, The transmission assembly includes an elongated swing block sleeved on a rotating shaft, a first protrusion at one end of the elongated swing block, and a second protrusion at the other end of the elongated swing block. The upper slide bar has a first elongated groove that mates with the first protrusion, and the lower slide bar has a second elongated groove that mates with the second protrusion. Both the first elongated groove and the second elongated groove extend laterally.

7. The tunnel protection door according to claim 6, characterized in that, The inner handwheel is connected to the rotating shaft by a key, and the elongated swing block is also connected to the rotating shaft by a key. A spring lock mechanism is provided at the end of the rotating shaft facing outwards from the door, and the outer handwheel is connected to the rotating shaft through the spring lock mechanism. The spring lock mechanism can be unlocked by a key and a remote control mechanism.

8. The tunnel protection door according to claim 7, characterized in that, The spring lock mechanism includes an unlocking spring, a lock cylinder, a sleeve fitted over the tail of the lock cylinder, and a movable pin located at the tail of the lock cylinder. The lock cylinder has a countersunk hole at its end for insertion. The unlocking spring is installed at the bottom of the countersunk hole and can push the head of the lock cylinder out of the countersunk hole. An L-shaped groove is provided on the rotating shaft to limit the range of motion of the movable pin. The lock cylinder can rotate relative to the sleeve. A sliding key is fixed on the outer wall of the sleeve. A groove is provided on the rotating shaft to guide the sliding key to slide axially. The outer handwheel has a keyway adapted to the sliding key. The L-shaped groove includes an axial groove and a circumferential groove. The end of the lock cylinder facing outwards can be turned with a key.

9. The tunnel protection door according to claim 8, characterized in that, The remote control structure includes a processor, a controller, a power supply module, an electromagnet, and a reset device mounted on the door. The processor is connected to the input terminal of the controller, which is triggered to operate via a communication module. An unlocking sleeve is fitted onto the rotating shaft, and the unlocking sleeve is connected to the electromagnet via a pull rod. One end of the pull rod is connected to the top of the electromagnet's spindle, and the other end is hinged to the swing plate portion of the unlocking sleeve. The reset device is used to pull the unlocking sleeve to reset. The controller is electrically connected to the electromagnet. The power supply module is used to supply power to the controller and the electromagnet.

10. The tunnel protection door according to claim 9, characterized in that, The unlocking sleeve includes a collar portion, a swing plate portion disposed on the collar portion, and an arc plate portion disposed on the collar portion. The arc plate portion is used to push the movable pin in the circumferential groove to the axial groove. The reset device is a torsion spring. One end of the torsion spring is fixed to the swing plate portion of the unlocking sleeve, and the other end is fixed to the gantry by a screw.

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