Intercom passage security door and method of use

Abstract

The application provides a kind of liaison passage safety protection door and its using method, including protection door main structure, the protection door main structure includes protection door body and with the protection door body fixed connection protection door frame;First locking device, second locking device and third locking device are provided on the protection door main structure, and the first locking device, second locking device and third locking device structure are not identical.The application completes the quick, reliable locking of liaison passage safety protection door by adopting three kinds of structure different triple locking device, efficiently completes the work of responding to liaison passage construction emergency, reduces the time cost and security risk of emergency disposal.The protection door frame and door sleeve segmented design processing provided by the application, the door sleeve can be adapted to the different sections of tunnel liaison passage construction situation, and the adaptive customization processing is carried out;Protection door frame is convenient to replace, can save replacement time and replacement cost, effectively controls engineering construction cost.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to a safety protection door for connecting passages in subway tunnel construction and its usage method. Background Technology

[0002] Currently, my country's tunnel engineering is developing rapidly, making it the country with the largest number of railway tunnels and the fastest development in the world. my country's railway operating mileage has reached over 131,000 kilometers, with high-speed rail accounting for two-thirds of the world's total. With the rapid development of cities, subways, as a new mode of transportation, are playing an increasingly important role in alleviating urban traffic pressure. For subway shield tunnel sections, according to regulations, a connecting passage must be constructed between the left and right lines every 600 meters to connect the two tunnels. When constructing connecting passages using cut-and-cover technology, the impact on the tunnel's own structure, surrounding buildings, and existing tunnels must be considered, as well as the impact of sudden accidents such as collapses, water inrushes, and sand inrushes during construction. Cut-and-cover construction of connecting passages is increasingly used in subways. If the geological conditions at the location of the connecting passage are poor, it can lead to dangers such as water inrushes and sand inrushes. Generally, measures such as grouting inside the tunnel to reinforce and improve the soil are taken. However, cut-and-cover construction still carries many unpredictable risks.

[0003] In subway tunnel construction, the construction of connecting passages can only proceed after the main tunnel is completed, and they represent one of the major risk sources during tunnel construction. If a collapse or water seepage occurs during the excavation and support of the connecting passage, and if it is not effectively isolated from the main tunnel under construction in a timely manner, a large amount of mud and sand will flow into the main tunnel, directly leading to ground subsidence, damage to surrounding buildings and structures, burying the tunnel boring machine and existing tunnels, and even casualties—major safety and quality accidents causing huge economic losses. Therefore, in order to effectively isolate the connecting passage from the main tunnel in a timely manner and avoid potential dangers, it is necessary to install appropriate protective devices at the entrance of the connecting passage. Currently, to prevent the escalation of potential accidents, safety doors are installed on the reserved openings of the tunnel on the excavated side. If an accident occurs in the passage during construction, the safety doors can be closed immediately after personnel evacuation.

[0004] Existing protective technologies for connecting passage construction typically involve fabricating a temporary rectangular protective gate before construction. In case of emergencies such as water inrush, sand inrush, or landslides, the gate is closed by using two pairs of rotating handles on opposite sides of the hinges to initially lock the gate. Complete locking is then achieved by tightening bolts distributed around the gate. However, this method is limited by the position of the rotating handles and the bolt tightening process. Furthermore, in existing solutions, closing the safety gate involves rotating the door panel until it fits against the frame, then securing it with bolts around the frame and door panel. Because there are many bolts, and in emergencies, appropriate tools are needed to tighten them, the locking process is time-consuming. In the event of water inrush or sand inrush, it cannot quickly and securely connect the door panel and frame. This type of protective gate is time-consuming and labor-intensive to close, fails to provide timely waterproofing and soil retention, and increases safety hazards in handling emergencies during connecting passage construction. In addition, due to the differences in construction of tunnels in different sections and the processing and manufacturing technology of temporary protective doors, the existing temporary protective doors have poor reusability, which is not conducive to controlling the construction cost of the project.

[0005] Therefore, how to quickly and effectively protect communication channels has become an important issue facing those skilled in the art. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a safety gate for a connecting passage, featuring a triple locking device that enables efficient and rapid locking of the gate. This solves the time-consuming and labor-intensive problems associated with the operation of existing temporary safety gates, and addresses the inability to promptly achieve waterproofing and soil retention. Furthermore, the main structure of the safety gate and the door frame connecting to the tunnel connecting passage provided by this invention are designed and manufactured separately, allowing for the recycling of the main structure and facilitating cost control during the construction of the connecting passage.

[0007] To achieve the above objectives, the present invention provides a security door for a communication passage, comprising a main structure of the security door, wherein the main structure of the security door includes a security door body and a security door frame fixedly connected to the security door body; the main structure of the security door is provided with a first locking device, a second locking device and a third locking device, wherein the first locking device, the second locking device and the third locking device have different structures.

[0008] Furthermore, the first locking device includes cam locking devices disposed on the first and third sides of the main structure of the protective door, with the first and third sides being disposed opposite to each other. The cam locking device includes an eccentric locking wheel disposed on the protective door body and a cam locking device pull rod connected to the eccentric locking wheel. Cam locking device slots are respectively provided on the protective door body and the protective door frame, and the cam locking device is fixed in the cam locking device slot.

[0009] Furthermore, the second locking device includes a screw-link locking device for locking the second, third, and fourth sides of the main structure of the protective door. The second and fourth sides are arranged opposite to each other. The screw-link locking device includes a screw mechanism mounted on the protective door body and a connecting rod connected to the screw mechanism. The screw mechanism includes a screw mechanism handwheel, a transmission screw connected to the screw mechanism handwheel, and a screw guide clamp mounted on the transmission screw. The connecting rod includes symmetrically arranged telescopic arms and a locking arm connected to the telescopic arms. Locking holes for fixing the locking arms are respectively provided on the protective door body and the protective door frame. The locking holes are respectively located on the second, third, and fourth sides of the protective door body and the protective door frame.

[0010] Furthermore, the protective door body is provided with a screw conveyor installation compartment, and the screw conveyor is installed in the screw conveyor installation compartment; and the screw conveyor of the screw connecting rod locking device adopts worm gear transmission.

[0011] Furthermore, the connecting rod of the lead screw locking device is fixed relative to the locking arm. The connecting rod is driven by a combination of a sleeve and a screw. The extension length of the locking arm can be finely adjusted by adjusting the length of the connecting rod through the sleeve and the screw.

[0012] Furthermore, the third locking device includes a bolt locking device for locking the perimeter of the main structure of the protective door. The bolt locking device includes a tensioning screw installed on the protective door body and a handle wheel and a bolt locking device washer connected to the tensioning screw. Bolt locking device slots are respectively provided on the protective door body and the protective door frame, and the bolt locking device is fixed in the bolt locking device slot.

[0013] Furthermore, the protective door for the communication channel provided by the present invention also includes a door sleeve that is detachably connected to the protective door frame, and the door sleeve is welded and installed on the steel pipe section of the communication channel.

[0014] Furthermore, a door sealing strip is provided between the protective door body and the protective door frame, and a door sealing groove is provided on the protective door body, with the door sealing strip disposed within the door sealing groove; a door frame sealing strip is provided between the protective door frame and the door sleeve, and a door frame sealing groove is provided on the protective door frame, with the door frame sealing strip disposed within the door frame sealing groove.

[0015] Furthermore, multiple ball valves are respectively installed on the protective door body and around the protective door frame.

[0016] Furthermore, the main protective structure adopts a rectangular frame structure, and the protective door is a box-shaped structure made of steel plate.

[0017] Furthermore, the bolt locking device is fixed to the rib plate opening of the protective door frame using a steel wire rope.

[0018] Furthermore, a sealing ring is provided on the connecting flange surface between the protective door frame and the door sleeve.

[0019] Furthermore, the protective door is also equipped with a ladder.

[0020] Furthermore, the main structure of the protective door is provided with a door hinge, the protective door body is provided with a door hinge, the protective door frame is provided with a hinge seat, and the protective door body and the protective door frame are fixedly connected by the door hinge and the hinge seat.

[0021] In another aspect, the present invention provides a method for using a security door for a communication channel, comprising the following steps:

[0022] S1: The main structure of the security door of the communication channel is detachably connected to the door frame by a fastening device;

[0023] S2: When the safety protection door of the communication channel needs to be locked, rotate the eccentric locking wheel of the cam locking device located on the first and third sides of the main structure of the protection door to adjust the gap between the contact surfaces of the protection door body and the protection door frame of the main structure of the protection door, so as to achieve a tight and close fit between the protection door body and the protection door frame.

[0024] S3: Rotate the screw mechanism handwheel of the screw linkage locking device installed on the main structure of the protective door, so that the locking arm of the screw linkage locking device is inserted into the locking holes installed on the second, third and fourth sides of the main structure of the protective door; realize the closing and locking function of the screw linkage locking device, and further realize the tight fit between the protective door body and the protective door frame contact surface;

[0025] S4: Adjust the length of the tensioning screw by rotating the handle wheel of the bolt locking device located around the main structure of the protective door, and adjust the gap between the contact surface of the protective door body and the protective door frame. When the tensioning screw is tightened, the contact surface between the protective door body and the protective door frame is completely fitted.

[0026] Furthermore, step S1 also includes hinged the protective door body and the protective door frame together using door hinges.

[0027] Further, step S2 specifically includes: rotating the lead screw handwheel, which drives the transmission lead screw of the lead screw connecting rod locking device to move left and right through the lead screw mechanism of the lead screw connecting rod locking device; when the transmission lead screw moves to the right, the locking arm fixed to the right end of the transmission lead screw is inserted into the locking hole on the third side of the protective main body structure; at the same time, the connecting rod of the lead screw connecting rod locking device located on the upper side of the transmission lead screw rotates counterclockwise and drives the locking arm located on the upper side of the transmission lead screw to move upward and insert into the locking hole on the second side of the protective door main body structure; the connecting rod located on the lower side of the transmission lead screw rotates clockwise and drives the locking arm located on the lower side of the transmission lead screw to move downward and insert into the locking hole on the fourth side of the protective door main body structure.

[0028] Furthermore, the method of using the communication channel safety protection door also includes: when unlocking the communication channel safety protection door, adjusting the length of the tensioning screw by rotating the handle wheel in the opposite direction; and rotating the screw mechanism handwheel in the opposite direction until the locking arm disengages from the locking holes located on the second, third, and fourth sides of the main structure of the protection door, thereby realizing the opening function of the screw linkage locking device; and rotating the eccentric locking wheel in the opposite direction to release the locking state of the protection door body and the protection door frame.

[0029] The present invention has at least the following technical effects through the technical solution provided by the present invention:

[0030] Overall, this invention provides a multi-locking safety gate device for a communication passage. In this invention, the safety gate device employs a triple locking mechanism to lock and close the safety gate. The cam locking device operates quickly and effortlessly, initially locking the safety gate and pressing the sealing ring to ensure a rapid seal. The worm gear transmission mechanism of the screw-connecting rod locking device simultaneously controls the locking of multiple locking arms through a single screw mechanism, balancing the distribution of water and soil pressure on the gate body, reducing vibration and impact, and making the overall locking structure compact and stable. When the locking arms are extended to their positions, the bolt locking device fixes multiple sets of locking bolts around the perimeter of the safety gate, which can be operated individually via rotating wheels to press the sealing ring, achieving complete locking and closure of the gate. This achieves simultaneous locking of all four sides of the safety gate, ensuring rapid, safe, and reliable complete locking.

[0031] The safety protection door for the connecting passage provided by this invention adopts a sustainable design concept. The protective door frame and the door sleeve welded to the steel pipe segments of the connecting passage are designed and processed in sections. The customized door sleeve can not only meet the functional requirements, but also be adapted to local conditions according to the construction of the connecting passage in different sections of the tunnel. The protective door frame adopts a standardized design and is reusable. All components of the protective door frame are universal components, which can save replacement time and replacement costs and effectively control the construction cost of the project.

[0032] Therefore, the safety protection door for communication channels provided by the present invention can achieve fast and efficient locking and closing functions and reusability. Compared with existing temporary protection doors, the protection door device of the present invention improves the speed, efficiency, safety and reliability of operation, while saving engineering costs.

[0033] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0034] Figure 1 A schematic cross-sectional view of the overall structure of the security door for the communication channel provided by the present invention;

[0035] Figure 2 for Figure 1 A three-dimensional structural diagram of the main structure of the central protective door;

[0036] Figure 3 for Figure 2 A plan view of the main structure of the central protective door;

[0037] Figure 4 for Figure 2 A three-dimensional structural diagram of the central protective door frame;

[0038] Figure 5 for Figure 4 A schematic diagram of the planar structure of the central protective door frame;

[0039] Figure 6 for Figure 4 Cross-sectional view;

[0040] Figure 7 for Figure 2 A three-dimensional structural diagram of the central protective door;

[0041] Figure 8 for Figure 2 A schematic diagram of the planar structure of the central protective door;

[0042] Figure 9 for Figure 7 Cross-sectional view;

[0043] Figure 10 and Figure 11 for Figure 2 A schematic diagram of the cam locking device in the diagram;

[0044] Figure 12 for Figure 2 Schematic diagram of the lead screw connecting rod locking device in the middle;

[0045] Figure 13 for Figure 2 A schematic diagram of the bolt locking device structure;

[0046] Figure 14 A schematic diagram of the sealing structure of the security door for the communication channel provided by the present invention;

[0047] Figure 15 A flowchart illustrating the method of using the security door for the communication channel provided by the present invention.

[0048] Figure label:

[0049] 1. Safety door for connecting passage; 11. Main structure of the safety door; 111. First side of the main structure of the safety door; 112. Second side of the main structure of the safety door; 113. Third side of the main structure of the safety door; 114. Fourth side of the main structure of the safety door; 10. Safety door frame; 20. Safety door body; 90. Door casing; 30. Door hinge; 301. Hinge seat; 302. Door hinge; 40. Cam locking device; 50. Screw and connecting rod locking device; 60. Bolt locking device; 401. Cam locking device connecting pin; 402, 405. Cam locking device slots; 403. Cam locking device pull rod; 404. Eccentricity Locking wheel; 51 Screw motor; 501, 502 Locking sockets; 503 Screw guide clamp; 504 Connecting rod fixing pin; 505 Screw motor mounting compartment; 506 Connecting rod; 507 Locking arm; 508 Transmission screw; 509 Screw motor handwheel; 601 Bolt locking device gasket; 602, 605 Bolt locking device slot; 604 Tensioning screw; 603 Handwheel; 701 Sealing groove of protective door body; 702 Sealing strip of protective door body; 703 Sealing groove of protective door frame; 704 Sealing strip of protective door frame; 101, 201 Ball valve; 202 Ladder; 203 Grouting pipe Detailed Implementation

[0050] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0052] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positions of components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions. The transverse direction refers to the direction consistent with the length of the transverse reinforcing bar, and the longitudinal direction refers to the direction consistent with the length of the longitudinal reinforcing bar.

[0053] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0055] like Figure 1 As shown, Figure 1This is a cross-sectional schematic diagram of the overall structure of a security door for a communication passage provided by the present invention. As shown in the figure, an embodiment of the present invention provides a security door 1 for a communication passage, including a main door structure 11. The main door structure 11 includes a door frame 10 and a door body 20. The door body 10 and the door frame 20 are fixedly connected together. The main door structure 11 is provided with three locking devices of different structures for locking the door body 20 and the door frame 10. In the embodiment provided by the present invention, the three locking devices of different structures are a first locking device 40, a second locking device 50, and a third locking device 60.

[0056] In the embodiments provided by this invention, the safety protection door 1 of the connecting passage also includes a door sleeve 90 fixed to the steel pipe segment of the connecting passage. The door sleeve 90 is detachably connected to the protective door frame 10. The door sleeve 90 can be customized according to the construction conditions of the connecting passage in different sections of the tunnel. The protective door frame 10 adopts a standardized design and is reusable. All components of the protective door frame 10 are universal components, which can save replacement time and replacement costs and effectively control the construction cost. In one embodiment, the protective door frame 10 and the door sleeve 90 are connected together by bolts. The protective door frame 10 and the door sleeve 90 can also be fixed together by other detachable connection methods, which are not limited here.

[0057] like Figure 2 and Figure 3 As shown, Figure 2 for Figure 1 A three-dimensional structural diagram of the main structure of the central protective door; Figure 3 for Figure 2 A plan view of the main structure of the protective door. As shown in the figure, the first locking device 40 is located on the first side 111 and the third side 113 of the main structure 11. The second locking device 50 is located on the second side 112, the third side 113, and the fourth side 114 of the main structure 11. The third locking device 60 is located around the perimeter of the main structure 11.

[0058] The main structure 11 of the protective door adopts a rectangular frame structure. A door hinge 30 is provided on the first side of the main structure 11, which hinges the protective door body 20 and the protective door frame 12 together, allowing the protective door body 20 to open 180 degrees. Figure 3 In the embodiment shown, there are two door hinges 30. In other embodiments, the number can be reasonably set according to the length and width of the main structure 11 of the protective door, and the number is not limited.

[0059] In this example, the main structure 11 of the protective door includes four sets of first locking devices 40, one set of second locking devices 50, and twenty-one sets of third locking devices 60. In actual use, the number of first locking devices 40 and third locking devices 60 is not limited and can be adjusted as needed. Their positional distribution on the outer periphery of the main structure 11 of the protective door does not necessarily have to strictly follow this example, but should be distributed as symmetrically as possible. In the embodiment provided by this invention, the first locking device can be a cam locking device, the second locking device can be a screw-connecting rod locking device, and the third locking device can be a bolt locking device; their specific structures will be described in detail later.

[0060] Please refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 for Figure 2 A three-dimensional structural diagram of the central protective door frame. Figure 5 for Figure 4 A schematic diagram of the plan structure of the central protective door frame. Figure 6 for Figure 4 The cross-sectional view is shown. The protective door frame 10 of the communication passage safety door 1 provided in this embodiment includes two hinge seats 301 located on the left side, four cam locking device slots 402, five locking holes 501, 21 bolt locking device slots 602, and two ball valves 101. The protective door frame 10 is hinged to the protective door body 20 via the hinge seats 301, enabling the opening and closing of the protective door body 20. The cam locking device slots 402 and 602 are respectively connected to the cam locking device 40 and bolt locking device 60 with perforated pins, reducing the risk of loss and providing a secure support for the cam locking device 40 and bolt locking device 60 on the protective door frame 10. The ball valves 102 can be pressure relief ball valves, which can quickly balance the water and soil pressure on the front and rear sides of the communication passage safety door 1 when the protective door body 20 is closed. The locking holes 501 are used to fix the locking arm of the screw rod locking device.

[0061] In this example, the hinge seat 301 is located on the left side of the protective door frame, i.e., the first side 111 of the main structure 11 of the protective door. In actual use, depending on the opening direction, the hinge seat 301 can also be located on the right side of the protective door frame 10, i.e., the third side 113 of the main structure of the protective door. The number of hinge seats 301 can also be set according to the actual size of the protective door 10, and is not limited here. Similarly, the position and number of the cam locking device slot 402 and the bolt locking device slot 602 can also be set according to the number of cam locking devices and bolt locking devices. The position and number of locking holes 501 can also be reasonably adjusted and set according to the size of the protective door 20, and are not limited here.

[0062] Please refer to Figure 7 , Figure 8 and Figure 9 , Figure 7 for Figure 2 A three-dimensional structural diagram of the central protective door. Figure 5 for Figure 4 A schematic diagram of the plan structure of the central protective door. Figure 6 for Figure 4 The cross-sectional view is shown below. In this embodiment, the protective door 20 includes two hinges 302, four cam locking device slots 405, five locking holes 502 for screw-link locking devices, two screw guide clamps 503 for screw-link locking devices, four connecting rod fixing pins 504 for screw-link locking devices, a screw machine mounting compartment 505 for a screw-link locking device, 21 bolt locking device slots 602, six ball valves 201, and a ladder 202. The hinges 302 are used to mate with the hinge seats 301 on the protective door frame 10 to realize the opening and closing of the protective door 20. The cam locking device slots 402 and bolt locking device slots 602 respectively provide fastening support for the cam locking devices 40 and 60 on the protective door 20. The locking holes 502 and 501 are the same, both used to fix the locking arms of the screw-link locking devices to realize the extension and retraction guidance of the locking arms. The lead screw guide clamp 503 provides fixation and guidance for the left and right movement of the lead screw in the lead screw connecting rod locking device. The connecting rod fixing pin 504 is used for fixed support of the swing of the connecting rod in the lead screw connecting rod locking device, realizing the swing function of the crank rod. The mounting compartment 505 is used to fix the worm gear of the lead screw connecting rod locking device and provides installation and operation space for the lead screw machine handle. The ball valve 201 can be a pressure relief ball valve, used to quickly balance the water and soil pressure on the front and rear sides of the protective door after the protective door 20 is closed. If necessary, it can be connected to the grouting pipe 203 to grout the connecting passage. The ladder 202 facilitates various operations on the ball valve 201 and the bolt locking device 60 located on the upper part of the protective door 20.

[0063] In this example, the door hinge 302 is located on the left side of the protective door frame, i.e., the first side 111 of the main structure 11 of the protective door. In actual use, depending on the opening direction, the door hinge 302 can also be located on the right side of the protective door frame 10, i.e., the third side 113 of the main structure of the protective door. The number of door hinges 302 can also be set according to the actual size of the protective door 10, and is not limited here. The position and number of door hinges are matched with the hinge seat 301 set on the protective door frame 10. Similarly, the position and number of cam locking device slots 405 and bolt locking device slots 605 can also be set according to the number of cam locking devices and bolt locking devices, and correspond to the cam locking device slots 402 and bolt locking device slots 602 set on the protective door frame 10. The number and position of the screw guide clamp 503 of the screw locking device and the connecting rod fixing pins 504 of the four screw locking devices can also be set according to the number and position of the connecting rods. The position and number of locking holes 502 and 501 of the screw rod locking device can be reasonably adjusted and set according to the size of the protective door 20. There are no restrictions here. The position and number of locking holes 502 of the screw rod locking device need to match the locking holes 501 set on the protective door frame 10.

[0064] like Figure 10 and Figure 11 The diagram shows the structure of the cam locking device for the safety protection door of the communication passage provided by the present invention. The cam locking device 40 provided in this embodiment includes a cam locking device connecting pin 401, a cam locking device pull rod 403, and an eccentric locking wheel 404. The cam locking device pull rod 403 passes through the cam locking device connecting pin 401 and connects to the eccentric locking wheel 401. Cam locking device slots 405 and 402 are respectively provided on the protection door body 20 and the protection door frame 21. The cam locking device 40 is fixed in the cam locking device slots 405 and 402, which provide a secure support for the cam locking device 40 on the protection door body 20.

[0065] The cam locking device 40 provided in this embodiment is symmetrically arranged on the first side 111 and the third side 113 of the main structure of the protective door. In use, the gap between the contact surface of the protective door body 20 and the protective door frame 10 can be adjusted by rotating the eccentric locking wheel 404 to achieve a tight seal of the protective door body 20.

[0066] ] Figure 12 for Figure 2A schematic diagram of the screw-connecting rod locking device is shown in this example. The screw-connecting rod locking device 50 provided in this example includes a screw mechanism 51 mounted on the protective door body 20 and a connecting rod 506 connected to the screw mechanism 51. The screw mechanism 51 and the connecting rod 506 are drivenly connected. The screw mechanism 51 includes a screw mechanism handwheel 509, a transmission screw 508, and a screw guide clamp 503 mounted on the transmission screw 508. The screw mechanism handwheel 509 controls the movement of the transmission screw 508 via a worm gear. The connecting rod 506 includes symmetrically arranged telescopic arms and a locking arm 507 connected to the telescopic arms; the protective door body 20 and the protective door frame 10 are respectively provided with locking holes 502 and 501 for fixing the locking arm 507.

[0067] In this embodiment, the locking holes 501 of the five fixed locking arms are installed on the protective door frame 10, and the locking holes 502 of the five fixed locking arms are installed on the protective door body 20. There are two lead screw guide clamps 503 with lead screw connecting rod locking devices, four connecting rods 506 and four connecting rod fixing pins 504, a lead screw machine mounting compartment 505, five locking arms 507, a transmission lead screw 508, a lead screw machine 509, and a lead screw machine handwheel 509. Two pairs of locking holes are symmetrically arranged on the second side 112 and the fourth side 114 of the protective door main structure 11 for locking the protective door body 20 in both vertical and horizontal directions. A locking hole is provided on the third side 113 of the protective main structure 11 for further locking the protective door body 20 on the third side.

[0068] In use, rotating the screw handwheel 509 drives the transmission screw 508 to move left and right via the screw mechanism 51. When the transmission screw 508 moves to the right, the locking arm 507 fixed to the right end of the transmission screw 508 inserts into the locking holes 501 and 502 of the locking arm. At the same time, the upper connecting rod 506 rotates counterclockwise and drives the upper locking arm 507 to move upward, while the lower connecting rod 506 rotates clockwise and drives the lower locking arm 507 to move downward. The upper and lower locking arms 507 of the transmission screw 508 are respectively inserted into the locking holes 501 and 502 of the locking arm, thereby realizing the closing and locking function of the screw connecting rod locking device, and further realizing the tight fit between the contact surface of the protective door 20 and the protective door frame 10. When the lead screw 508 moves to the left, the connecting rod 506 and the locking arm 507 move in opposite directions, causing the five locking arms 507 to disengage from the locking holes 501 and 502 respectively, thus realizing the opening function of the lead screw connecting rod locking device. The connecting rod 506 adopts a sleeve plus screw design, and the extension length of the locking arm 507 is adjusted by adjusting the length of the connecting rod 506.

[0069] Figure 13 for Figure 2 A schematic diagram of the bolt locking device structure. (See attached diagram.) Figure 13As shown, the bolt locking device 60 includes a tensioning screw 604 mounted on the protective door body 20, a handle wheel 603 connected to the tensioning screw 604, and bolt locking device washers 601. Bolt locking device slots 602 and 605 are respectively provided on the protective door body 20 and the protective door frame 10, and the bolt locking device 60 is fixed within these slots. In this example, the handle bolt locking function is achieved by 21 bolt locking device washers 601 mounted on the protective door frame 10, 21 bolt locking device tensioning screws 602 mounted on the protective door body 20, and 21 bolt locking device rotating handle wheels 603. By rotating the handle wheel 603, the length of the tensioning screw 602 is adjusted, thereby adjusting the gap between the contact surfaces of the protective door body 20 and the protective door frame 10. When the tensioning screw 602 is tightened, the contact surfaces of the protective door body 20 and the protective door frame 10 are completely fitted together. The number and distribution of the bolt locking devices 60 can be adjusted according to the size of the protective door and the actual usage environment, and there are no restrictions.

[0070] Figure 14 This is a schematic diagram of the sealing structure of the security door for the communication channel provided by the present invention, as shown below. Figure 14 As shown, in this example, the sealing of the connection surface between the protective door frame 10 and the protective door body 20 is achieved by the sealing groove 701 and sealing strip 702 provided on the protective door body 20. When the protective door body 20 is locked and fitted with the protective door frame 10 through the cam locking device 40, the screw connecting rod locking device 50, and the bolt locking device 60, the sealing strip 702 is pressed, achieving the sealing function of the sealing strip. The sealing of the connection surface between the protective door frame 10 and the door sleeve 90 is achieved by the sealing groove 703 and sealing strip 704 provided on the protective door frame 10. Before the construction of the connecting passage, the door sleeve 90 is first welded to the steel pipe segment of the tunnel connecting passage, and the sealing strip 704 is installed on the sealing groove 703 of the protective door frame 10. The door sleeve 90 is connected to the protective door frame 10 by bolts, and the sealing function of the sealing strip 704 is achieved by tightening the connecting bolts.

[0071] like Figure 15 The diagram shown is a flowchart illustrating the usage method of the security door for the communication channel provided by this invention. The usage method provided by this invention includes the following steps:

[0072] S1: The main structure 11 of the safety door of the communication passage 1 is detachably connected to the door frame 90 by means of a fastening device;

[0073] S2: When locking the safety protection door 1 of the communication channel, rotate the eccentric locking wheel 404 of the cam locking device 40 located on the first side 111 and the third side 113 of the main structure of the protection door 11 to adjust the gap between the contact surfaces of the protection door body and the protection door frame of the main structure of the protection door, so as to achieve a tight and close fit between the protection door body 20 and the protection door frame 10.

[0074] S3: Rotate the screw mechanism handwheel 509 of the screw linkage locking device 50 installed on the main structure 11 of the protective door, so that the locking arm 507 of the screw linkage locking device 50 is inserted into the locking holes 501 and 502 installed on the second side 112, the third side 113 and the fourth side 114 of the main structure 11 of the protective door; realize the closing and locking function of the screw linkage locking device 50, and further realize the tight fit between the contact surface of the protective door body 20 and the protective door frame 10;

[0075] S4: Adjust the length of the tensioning screw 604 by rotating the handle wheel 603 of the bolt locking device 60 set around the main structure 11 of the protective door, and adjust the gap between the contact surface of the protective door body 20 and the protective door frame 10. When the tensioning screw 604 is tightened, the contact surface between the protective door body 20 and the protective door frame 10 is completely fitted.

[0076] In the above method, step S1 further includes hinged the protective door body 20 and the protective door frame 30 of the main structure 11 of the protective door together by means of door hinge 30. Step S2 specifically includes: rotating the screw mechanism handwheel 509, which drives the transmission screw 508 to move left and right via the screw mechanism 51 of the screw linkage locking device 50; when the transmission screw 508 moves to the right, the locking arm 507 fixed to the right end of the transmission screw 508 is inserted into the locking holes 501 and 502 on the third side 113 of the protective main structure 11; at the same time, the connecting rod 506 on the upper side of the transmission screw 508 rotates counterclockwise and drives the locking arm 507 on the upper side of the transmission screw 508 to move upward and insert into the locking holes 501 and 502 on the second side 112 of the protective door main structure 11; the connecting rod 506 on the lower side of the transmission screw 508 rotates clockwise and drives the locking arm 507 on the lower side of the transmission screw 508 to move downward and insert into the locking holes 501 and 502 on the fourth side 114 of the protective door main structure 11.

[0077] When unlocking the security door of the communication channel, adjust the length of the tensioning screw 604 by turning the handle wheel 603 in the opposite direction; and turn the screw handwheel 509 in the opposite direction until the locking arm 507 disengages from the locking holes 501 and 502 located on the second side 112, the third side 113 and the fourth side 114 of the main structure 11 of the security door, so as to realize the opening function of the screw connecting rod locking device 50; turn the eccentric locking wheel 404 in the opposite direction to release the locking state of the security door body 20 and the security door frame 10.

[0078] The communication passage safety protection door device provided in this embodiment of the invention has multiple locking functions. Compared with the protection doors in the prior art, the protection door provided by this invention includes a triple locking device: a cam locking device 40, a screw rod locking device 50, and a bolt locking device 60, thereby ensuring the reliable closure of the protection door 20. The cam locking device 40 is used for the initial locking of the protection door 20, which meets the need for rapid emergency closure; the screw rod locking device 50 adopts a worm gear and screw drive, and realizes rapid locking of the protection door 20 around its perimeter through the screw rod handle, so that the protection door 20 is further fitted to the protection door frame 10; the multiple bolt locking devices 60 achieve complete closure and fit between the protection door 20 and the protection door frame 10 by tightening the bolts, and the bolts are tightened quickly and efficiently by turning the handle. Compared to traditional protective doors that rely on bolts around the outer perimeter of the door for closure and locking, this triple-locking device enables rapid and reliable locking of the protective door, efficiently handling unexpected situations during the construction of the connecting passage and reducing time costs and safety hazards in emergency response. In other words, this invention uses a triple-locking mechanism to lock and close the safety protective door of the connecting passage. The cam-locking device operates quickly and effortlessly, initially locking the safety protective door and pressing the sealing ring to ensure a tight seal within a short time. The worm gear transmission mechanism of the screw-connecting rod locking device simultaneously controls the locking of multiple locking arms through a single screw mechanism, balancing the distribution of water and soil pressure on the protective door, reducing vibration and impact, and making the overall locking structure compact and stable. When the locking arms are extended to their positions, the bolt locking device fixes multiple sets of locking bolts around the perimeter of the safety protective door, which can be operated individually via rotating wheels to press the sealing ring, achieving complete locking and closure of the door. This allows the safety doors of the communication passage to be locked simultaneously from all four sides, ensuring that the safety doors of the communication passage are locked quickly, safely, and reliably.

[0079] The safety protection door for the connecting passage provided by this invention adopts a sustainable design concept. The protective door frame and the door sleeve welded to the steel pipe segments of the connecting passage are designed and processed in sections. The customized door sleeve can not only meet the functional requirements, but also be adapted to local conditions according to the construction of the connecting passage in different sections of the tunnel. The protective door frame adopts a standardized design and is reusable. All components of the protective door frame are universal components, which can save replacement time and replacement costs and effectively control the construction cost of the project.

[0080] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0081] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0082] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A security door for a communication passage, characterized in that, The system includes a main structure for a protective door, comprising a protective door body and a protective door frame fixedly connected to the protective door body. The main structure is equipped with a first locking device, a second locking device, and a third locking device, wherein the first, second, and third locking devices have different structures. The first locking device is a cam locking device disposed on a first side and a third side of the main structure of the protective door, with the first side and the third side being opposite to each other. The cam locking device includes an eccentric locking wheel disposed on the protective door body and a cam locking device pull rod connected to the eccentric locking wheel. Cam locking device slots are respectively provided on the protective door body and the protective door frame, and the cam locking device is fixed within the cam locking device slots. The second locking device is a screw-link locking device that locks the second, third, and fourth sides of the main structure of the protective door. The second and fourth sides are arranged opposite to each other. The screw-link locking device includes a screw mechanism mounted on the protective door body and a connecting rod connected to the screw mechanism. The screw mechanism includes a screw mechanism handwheel, a transmission screw connected to the screw mechanism handwheel, and a screw guide clamp mounted on the transmission screw. The connecting rod includes symmetrically arranged telescopic arms and a locking arm connected to the telescopic arms. Locking holes for fixing the locking arms are respectively provided on the second, third, and fourth sides of the protective door body and the protective door frame. The third locking device is a bolt locking device that locks the perimeter of the main structure of the protective door. The bolt locking device includes a tensioning screw on the protective door body, a handle wheel connected to the tensioning screw, and a bolt locking device washer. The protective door body and the protective door frame are respectively provided with bolt locking device slots, and the bolt locking device is fixed in the bolt locking device slots.

2. The security door for the communication passage as described in claim 1, characterized in that, The protective door is equipped with a screw conveyor installation compartment, and the screw conveyor is installed inside the screw conveyor installation compartment; and the screw conveyor of the screw connecting rod locking device adopts worm gear transmission.

3. The security door for the communication passage as described in claim 1, characterized in that, The connecting rod of the screw-connecting rod locking device is fixed relative to the locking arm. The connecting rod is driven by a combination of a sleeve and a screw. The extension length of the locking arm can be finely adjusted by adjusting the length of the connecting rod through the sleeve and the screw.

4. The security door for the communication passage as described in claim 1, characterized in that, It also includes a door sleeve that is detachably connected to the protective door frame, the door sleeve being welded and installed on the steel pipe section of the connecting passage.

5. The security door for the communication passage as described in claim 4, characterized in that, A door sealing strip is provided between the protective door body and the protective door frame, and a door sealing groove is provided on the protective door body, with the door sealing strip disposed within the door sealing groove; a door frame sealing strip is provided between the protective door frame and the door sleeve, and a door frame sealing groove is provided on the protective door frame, with the door frame sealing strip disposed within the door frame sealing groove.

6. The security door for the communication passage as described in claim 1, characterized in that, Multiple ball valves are installed on the protective door body and around the protective door frame.

7. The security door for the communication passage as described in claim 1, characterized in that, The main structure of the protective door adopts a rectangular frame structure, and the door body is a box-shaped structure made of steel plate.

8. A method of using a security door for a communication passage according to any one of claims 1-7, characterized in that: Includes the following steps: S1: The main structure of the security door of the communication channel is detachably connected to the door frame by a fastening device; S2: When the safety protection door of the communication channel needs to be locked, rotate the eccentric locking wheel of the cam locking device located on the first and third sides of the main structure of the protection door to adjust the gap between the contact surfaces of the protection door body and the protection door frame of the main structure of the protection door, so as to achieve a tight and close fit between the protection door body and the protection door frame. S3: Rotate the screw mechanism handwheel of the screw linkage locking device installed on the main structure of the protective door, so that the locking arm of the screw linkage locking device is inserted into the locking holes installed on the second, third and fourth sides of the main structure of the protective door; realize the closing and locking function of the screw linkage locking device, and further realize the tight fit between the protective door body and the protective door frame contact surface; S4: Adjust the length of the tensioning screw by rotating the handle wheel of the bolt locking device located around the main structure of the protective door, and adjust the gap between the contact surface of the protective door body and the protective door frame. When the tensioning screw is tightened, the contact surface between the protective door body and the protective door frame is completely fitted.

9. The method of using the security door for the communication passage as described in claim 8, characterized in that, Step S1 further includes hinged the protective door body and the protective door frame together using door hinges.

10. The method of using the security door for the communication passage as described in claim 8, characterized in that, Step S2 further includes: rotating the screw mechanism handwheel, which drives the transmission screw of the screw mechanism to move left and right through the screw mechanism of the screw linkage locking device; when the transmission screw moves to the right, the locking arm fixed to the right end of the transmission screw is inserted into the locking hole on the third side of the main structure of the protective door; at the same time, the connecting rod of the screw linkage locking device located on the upper side of the transmission screw rotates counterclockwise and drives the locking arm located on the upper side of the transmission screw to move upward and insert into the locking hole on the second side of the main structure of the protective door; the connecting rod located on the lower side of the transmission screw rotates clockwise and drives the locking arm located on the lower side of the transmission screw to move downward and insert into the locking hole on the fourth side of the main structure of the protective door.

11. The method of using the security door for the communication passage as described in claim 8, characterized in that, Also includes: When unlocking the security door of the communication channel, adjust the length of the tensioning screw by turning the handle wheel in the opposite direction; Then rotate the screw mechanism handwheel in the opposite direction until the locking arm disengages from the locking holes located on the second, third, and fourth sides of the main structure of the protective door, thereby realizing the opening function of the screw linkage locking device; rotate the eccentric locking wheel in the opposite direction to release the locking state of the protective door body and the protective door frame.

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