Emergency lifting device for civil defense door and flood gate of subway tunnel

Abstract

The invention relates to the technical field of tunnel civil defense, in particular to an emergency lifting device for a subway tunnel civil defense door and a flood gate, which comprises a mounting mechanism, a driving assembly, a jacking assembly and a control mechanism, the mounting mechanism is mounted below a flood gate of the civil air defense door, the driving assembly is mounted in the mounting mechanism, the jacking assembly is mounted in the mounting mechanism, the jacking assembly is arranged right opposite to the lower surface of the flood gate of the civil air defense door, and the control mechanism is mounted in the mounting mechanism; the driving assembly is manually held to move up and down, hydraulic oil in the hydraulic cavity in the mounting mechanism flows into the jacking cavity in a one-way mode under the control of the control mechanism, and the jacking block is pushed to move upwards to achieve emergency lifting.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel civil air defense, and in particular to an emergency lifting device for a civil air defense door or flood prevention door in a subway tunnel. Background Art

[0002] With the continuous expansion of urban subway construction, the safety protection requirements for subway tunnels are becoming increasingly stringent, especially when facing sudden floods (such as heavy rainfall, pipe bursts, river backflow, etc.). Subway tunnels are very likely to be flooded due to insufficient drainage or excessive external water pressure, resulting in equipment damage, operational interruption and even casualties. In order to ensure the safety of the internal structure and operation of the tunnel, civil air defense doors or anti-flood doors are usually installed at the connection between subway stations and tunnels, and between stations, as a protective barrier to prevent water intrusion. However, these civil air defense doors or anti-flood doors often have heavy structures and rely on manual operation or electric device control. They have problems such as slow opening or closing response time, high failure rate, and high maintenance cost, making it difficult to cope with the emergency handling needs of sudden flooding incidents. In addition, due to complex terrain or limited space in some areas, traditional drive devices are difficult to deploy, further affecting the efficient opening and closing operation of the door body.

[0003] In order to improve the rapid response capability of subway tunnel civil defense doors or anti-flooding doors in emergency situations, relevant research has gradually focused on emergency lifting devices with autonomous lifting capabilities. Such devices usually require a stable and reliable power source (such as hydraulic, pneumatic, and electric hybrid systems) to maintain good operating performance even in power outages or harsh environments. At the same time, the emergency lifting device must also take into account characteristics such as compact structure, sensitive response, and easy maintenance to adapt to the narrow space limitations of underground tunnels. Although some existing devices already have lifting functions, they still have deficiencies in control accuracy, load capacity, and operational redundancy design, resulting in an inability to accurately match actual needs in disaster scenarios. Therefore, the development of an emergency lifting device for civil defense doors and anti-flooding doors with rapid response, fault self-detection, multiple power sources, and modular structure has become one of the important development directions of subway disaster prevention and mitigation technology, and has significant technical and application value.

[0004] In view of the above situation, in order to overcome the above technical problems, the present invention designs an emergency lifting device for subway tunnel civil defense doors and anti-flooding doors, which solves the above technical problems. Summary of the Invention

[0005] The technical purpose to be achieved by this invention is: to design an emergency lifting device for the civil defense doors and flood prevention doors of subway tunnels, and to install it on the ground below the civil defense doors. When the civil defense doors of subway tunnels need to be urgently lifted, the civil defense doors can be quickly lifted manually or mechanically.

[0006] In order to achieve the above technical objectives, the present invention provides the following technical solutions:

[0007] The emergency lifting device for subway tunnel civil air defense and flood prevention doors primarily consists of four core structural components: an installation mechanism, a drive assembly, a lifting assembly, and a control mechanism, forming a compact, functionally coordinated whole. The installation mechanism is the foundational support for the entire device and is typically fixed to the area below the civil air defense or flood prevention door. It is used to support and secure the remaining components, ensuring a stable operating foundation for the device in emergencies. The drive assembly is installed within the installation mechanism and provides direct mechanical power for the lifting action. The lifting assembly is also located within the installation mechanism, with its lifting direction facing downward from the civil air defense or flood prevention door. It is primarily used to lift or elevate the door from its closed position in emergencies, enabling rapid opening and closing. The control mechanism, located within the installation mechanism and connected to the drive and lifting assemblies, coordinates the action sequence and pressure conversion of each component.

[0008] In actual use, the operator manually grips the drive assembly and performs reciprocating up and down motions, thereby driving the drive assembly and causing pressure changes in the hydraulic chamber provided in the installation mechanism. At this point, the control mechanism serves to divert and control the direction of pressure, causing the hydraulic oil in the hydraulic chamber to flow unidirectionally into the jacking chamber along a set path. Driven by the hydraulic oil, the jacking block in the jacking assembly moves slowly and steadily upward, thereby achieving emergency jacking operations for civil air defense doors or flood control doors. This structure achieves mechanical-hydraulic linkage without relying on a power source, making it suitable for rapid emergency response in extreme situations such as subway power outages or control system failures, and has high safety and practicality.

[0009] The installation mechanism includes five main structural components: a mounting base, an inner flow channel, an outer flow channel, a jacking sleeve, and a drive sleeve. These components coordinate with each other to achieve the stable support and hydraulic channel guidance functions of the entire emergency lifting device. Among them, the mounting base is the core bearing structure of the mounting mechanism. It is firmly buried below the ground and has good structural stability and impact resistance, and can adapt to the complex operating environment of subway tunnels. The interior of the mounting base is provided with an inner flow channel and an outer flow channel. These two flow channels respectively undertake the input and return functions of the hydraulic oil, ensuring that the hydraulic system has a good circulation path when working, thereby maintaining the normal operation of the jacking assembly. The jacking sleeve and the drive sleeve are respectively arranged on the upper part of the mounting base. The jacking sleeve is used to install the jacking component and is connected to the jacking block. It is responsible for directly pushing up the civil defense door or flood prevention door; the drive sleeve is connected to the drive assembly and is used to transmit the driving force applied by the operator. It is the key path for the entire device to achieve manual mechanical drive. The overall design structure is compact and the operation is reliable.

[0010] The internal structure of the jacking sleeve is rationally designed and is divided into two functional areas, the jacking chamber and the hydraulic chamber, to achieve a stable and efficient hydraulic transmission effect. The jacking chamber is arranged outside the hydraulic chamber, and the two are coaxially arranged to form a nested structural design, which effectively utilizes limited space to improve the compactness of the system. Among them, the cross-sectional shape of the jacking chamber is set to be annular. This design not only enhances its structural strength and pressure-bearing capacity, but also facilitates uniform distribution when under force, reduces local stress concentration problems, and thus improves overall working stability. During the operation of the device, the hydraulic oil is first injected into the hydraulic chamber located in the center. The pressure generated pushes the jacking blocks in the surrounding annular jacking chamber to move upward, realizing a rapid jacking action on the civil defense door or flood prevention door. This coaxial nested design tightly couples the hydraulic and jacking actions, has excellent mechanical properties and transmission efficiency, and is particularly suitable for scenarios such as subway tunnels where space is limited but high-intensity output is required.

[0011] The inner flow channel and the outer flow channel serve as key channels in the hydraulic system, and are responsible for the transmission and circulation functions of the hydraulic oil respectively. The two ends of the inner flow channel are respectively opened below the jacking chamber and the drive sleeve, and are mainly used to direct the hydraulic pressure transmitted by the drive sleeve to the jacking chamber, so that the jacking block can rise smoothly after receiving the hydraulic driving force, thereby realizing the lifting operation of the civil air defense door or the anti-flood door. The two ends of the outer flow channel are respectively opened below the hydraulic chamber and the drive sleeve, and are responsible for guiding the excess or reflux hydraulic oil in the hydraulic chamber back to the drive component area to form a closed oil circuit circulation system. Through this dual-channel setting, not only the directional delivery and recovery of the hydraulic oil are effectively realized, and the stability and efficiency of the system operation are improved, but it also facilitates the subsequent regulation and maintenance of the hydraulic pressure, further enhancing the application reliability and response speed of the emergency lifting device in the emergency environment of the subway tunnel.

[0012] The drive assembly has a compact structure and mainly includes multiple components such as a drive piston, a sealing ring, a drive rod, a mounting rod and a holding rod, forming a complete manual drive system. Among them, the drive piston, as the core component of power transmission, is installed inside the mounting mechanism and is connected to the inner and outer flow channels in the hydraulic system to promote the flow of hydraulic oil under manual operation. In order to ensure that the drive piston does not leak liquid during movement, a sealing ring is provided on its outer surface, which effectively improves the sealing performance and hydraulic efficiency by tightly fitting the inner wall. The upper end of the drive piston is connected to the drive rod, and the drive rod is further connected to the mounting rod, so that the entire drive path is vertically connected and the force transmission is direct. A holding rod is provided on the mounting rod, and the operator can directly perform up and down reciprocating motion through the holding rod, thereby driving the entire drive assembly to work and realize the pressurization and delivery of hydraulic oil. This structure not only improves the convenience and control accuracy of manual operation, but also ensures the rapid response capability of the equipment in emergency situations. It is an indispensable and important part of the emergency opening system of subway tunnel flood prevention doors.

[0013] The number of the gripping rods is set to 3 to 5, and can be flexibly configured according to actual operational needs, which not only meets the convenience of single-person operation, but also adapts to scenarios of collaborative operation by multiple people. Each gripping rod is set on the side of the mounting rod and is evenly arranged in a circular array along its circumference. This annular arrangement structure helps to provide stable gripping points in different directions, allowing operators to grasp and apply force smoothly regardless of their position. The gripping rod can be made of sturdy and durable metal materials or high-strength composite materials, and the outer surface is provided with an anti-slip texture to enhance the control feel and safety. In actual application, the operator can hold the gripping rod and push the drive rod up and down to drive the hydraulic system by driving the piston; the gripping rod can also be connected to an external operating device (such as a hand crank arm or power unit) to achieve a faster and more labor-saving jacking action. This structure significantly improves the operational flexibility and response speed of the equipment in an emergency, ensuring that the civil defense door or flood prevention door can be opened or closed in a short time, and improving the practicality and reliability of the tunnel protection system.

[0014] The jacking assembly is a key structural part for achieving emergency lifting of civil air defense doors or anti-flooding doors, and mainly includes components such as a jacking piston, a sealing ball, a jacking rod and a jacking block. The jacking piston is installed inside the installation mechanism and is connected to the hydraulic chamber. It is the core component that converts hydraulic pressure into mechanical thrust. A sealing ball is provided on the side of the jacking piston. The sealing ball can effectively block the hydraulic channel during the movement of the piston, prevent hydraulic oil leakage, and ensure that the system maintains stable sealing under high pressure. A jacking rod is installed at the upper end of the jacking piston, which is used to transmit the thrust generated by the piston upward in the vertical direction and further drive the jacking block to achieve the actual jacking action. The jacking block is installed on the top of the jacking rod and directly contacts the lower end of the civil air defense door or anti-flooding door. It is the terminal component for transmitting lifting force. The overall structural design is simple and efficient, and can quickly respond to pressure changes from the hydraulic system to achieve smooth lifting of the civil air defense door in emergency situations, greatly improving the response speed and operational reliability of the subway tunnel anti-flooding system.

[0015] The control mechanism is a crucial component of the emergency lifting device, responsible for controlling the flow and regulating the hydraulic oil pressure. Its structure comprises multiple functional units, including a water inlet, a transition port, a transition chamber, a mounting ring, a water outlet, and a control assembly. The control assembly is mounted on the mounting ring, forming a stable mounting structure that prevents displacement or loosening during operation. The water inlet, located above the control assembly, is where the hydraulic oil enters the control mechanism. Liquid is injected under pressure through the water inlet. The liquid then flows through the transition port below it and into the transition chamber, which acts as a buffer and flow rate regulator, helping to reduce impact forces within the hydraulic system and enhance system stability. The mounting ring, located below the transition chamber, provides structural connection and sealing support. Finally, the hydraulic oil exits from the bottom of the control assembly through the water outlet and enters the subsequent hydraulic channel or lifting chamber. The control assembly's regulatory functions enable precise control of the hydraulic flow rate, flow rate, and direction, ensuring an efficient, smooth, and controllable emergency lifting process, significantly enhancing the device's practicality and safety.

[0016] The control assembly, a key regulatory unit in the control mechanism, consists of a control block, an overflow port, and a support spring. These components work together to stabilize and protect the hydraulic system from overflow. The control block, located in the center of the transition chamber, is the core component that guides the flow of hydraulic oil and regulates pressure fluctuations. An overflow port is located on the side of the control block. This port drains excess hydraulic oil when the internal pressure of the hydraulic system exceeds a set threshold, preventing damage or loss of control due to excessive pressure. The support spring is mounted below the control block, with its upper and lower ends elastically engaging the bottom of the control block and the top of the mounting ring, respectively, providing support and cushioning. When hydraulic oil enters the transition chamber and the pressure rises to a certain level, the support spring, under compression, causes the control block to shift accordingly, opening the overflow port for pressure relief. This compact and responsive design effectively improves the safe and stable operation of the entire emergency jacking device, making it particularly suitable for underground engineering environments with high safety requirements, such as subway tunnels.

[0017] The outer diameter of the control block is set to the same value as the diameter of the transition port. This design ensures a tight fit within the transition port, preventing hydraulic oil leakage or excessive fluid resistance between the two. This dimensional matching also facilitates stable operation of the control block within the transition port, ensuring smooth fluid flow and pressure balance in the hydraulic system, and improving the overall efficiency and safety of the device.

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

[0019] (1) The present invention significantly improves the response speed and operational reliability of subway tunnel civil defense doors and anti-flood doors in emergency situations such as sudden flooding by providing an emergency lifting device with a reasonable structure and complete functions. The device integrates an installation mechanism, a drive component, a lifting component and a control mechanism to form a compact and efficient hydraulic mechanical system. Through manual drive combined with hydraulic transmission, the door body can be quickly lifted, ensuring that the opening and closing operations of the protective door can be completed smoothly in extreme environments such as power outages or automatic control failures, avoiding equipment damage and operation interruptions caused by flooding. In addition, the overall design adopts key sealing structures such as sealing rings and sealing balls to ensure the stability and sealing of the hydraulic system, greatly reduce the risk of oil leakage, improve the durability and safety performance of the system, and greatly meet the high standards for protective equipment in the special environment of subway tunnels.

[0020] (2) The control mechanism of the present invention adopts a reasonable layout of the water inlet, transition chamber, control block and overflow port, and has excellent pressure regulation and overflow protection functions, which effectively prevents the system from being damaged due to overpressure and improves the safety assurance capability of the equipment. The design of multiple gripping rods adopts a circular array arrangement, which enhances the operator's flexibility and operational stability, making the jacking action smoother and more convenient. The device is not only simple in structure and easy to maintain, but also has a quick response and humanized operation. It greatly improves the emergency response capability of subway tunnel flood prevention doors, ensures the safe operation of urban rail transit systems under extreme climate or sudden disaster conditions, and has important practical significance and promotion value for improving the level of public safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0025] Figure 3 is a cross-sectional view of the mounting mechanism of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the drive assembly of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the jacking assembly of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the control mechanism of the present invention;

[0029] Figure 7 It is a structural diagram of the control component of the present invention.

[0030] In the figure: 1. Mounting mechanism; 11. Mounting base; 12. Inner flow channel; 13. Outer flow channel; 14. Lifting sleeve; 141. Lifting chamber; 142. Hydraulic chamber; 15. Driving sleeve; 2. Driving assembly; 21. Driving piston; 22. Sealing ring; 23. Driving rod; 24. Mounting rod; 25. Holding rod; 3. Lifting assembly; 31. Lifting piston; 32. Sealing ball; 33. Lifting rod; 34. Lifting block; 4. Control mechanism; 41. Water inlet; 42. Transition port; 43. Transition chamber; 44. Mounting ring; 45. Water outlet; 46. Control assembly; 461. Control block; 462. Overflow port; 463. Support spring. DETAILED DESCRIPTION

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] like Figure 1-7 As shown, the emergency lifting device for subway tunnel civil air defense doors and flood prevention doors mainly consists of four core structural components: mounting mechanism 1, drive assembly 2, lifting assembly 3, and control mechanism 4, forming a compact and functionally coordinated whole. Mounting mechanism 1 is the basic support component of the entire device and is usually fixed in the area below the civil air defense door or flood prevention door. It is used to support and secure the remaining components, ensuring a stable operating foundation for the device in an emergency. Drive assembly 2 is installed inside mounting mechanism 1 and its function is to provide direct mechanical power for the lifting action. Lifting assembly 3 is also arranged inside mounting mechanism 1, with its lifting direction facing the bottom of the civil air defense door or flood prevention door. It is mainly used to lift or raise the door body from the closed position in an emergency to achieve rapid opening and closing. Control mechanism 4 is located inside mounting mechanism 1 and is connected to drive assembly 2 and lifting assembly 3. It is used to coordinate the action sequence and pressure conversion of each component.

[0033] During actual application, the operator manually holds the drive assembly 2 and performs reciprocating motion up and down, thereby driving the drive assembly 2 to work and causing pressure changes in the hydraulic chamber 142 provided in the installation mechanism 1. At this time, the control mechanism 4 plays the role of diverting and controlling the direction of pressure, so that the hydraulic oil in the hydraulic chamber 142 flows into the jacking chamber 141 in a unidirectional manner according to the set path. Driven by the hydraulic oil, the jacking block 34 in the jacking assembly 3 moves upward slowly and steadily, thereby realizing the emergency jacking operation of the civil defense door or the anti-flooding door. This structure can realize mechanical-hydraulic linkage without relying on power supply, and is suitable for rapid emergency response in extreme situations such as subway power outages or control system failures, and has high safety and practicality.

[0034] like Figure 3 As shown, the mounting mechanism 1 comprises five main structural components: a mounting base 11, an inner flow channel 12, an outer flow channel 13, a lifting sleeve 14, and a drive sleeve 15. These components coordinate with each other to provide stable support and hydraulic channel guidance for the entire emergency lifting device. The mounting base 11 is the core load-bearing structure of the mounting mechanism 1. It is securely buried below the ground and possesses excellent structural stability and impact resistance, adapting to the complex operating environment of subway tunnels. The mounting base 11 is internally provided with an inner flow channel 12 and an outer flow channel 13. These two channels respectively carry the hydraulic oil input and return, ensuring a good circulation path for the hydraulic system during operation, thereby maintaining the normal operation of the lifting assembly 3. The lifting sleeve 14 and the drive sleeve 15 are respectively arranged on the upper portion of the mounting base 11. The lifting sleeve 14 is used to mount the lifting components and is connected to the lifting block 34, directly responsible for the upward push of the civil air defense door or flood prevention door. The drive sleeve 15 is connected to the drive assembly 2, transmitting the driving force applied by the operator and is the key path for the entire device to achieve manual mechanical actuation. The overall design is compact and reliable in operation.

[0035] The internal structure of the jacking sleeve 14 is reasonably designed and is divided into two functional areas, a jacking chamber 141 and a hydraulic chamber 142, to achieve a stable and efficient hydraulic transmission effect. The jacking chamber 141 is arranged outside the hydraulic chamber 142, and the two are coaxially arranged to form a nested structural design, which effectively utilizes limited space to improve the compactness of the system. Among them, the cross-sectional shape of the jacking chamber 141 is set to be annular. This design not only enhances its structural strength and pressure-bearing capacity, but also facilitates uniform distribution when under force, reduces local stress concentration problems, and thus improves overall working stability. During the operation of the device, the hydraulic oil is first injected into the hydraulic chamber 142 located in the center. The pressure generated pushes the jacking block 34 in the surrounding annular jacking chamber 141 to move upward, realizing a rapid jacking action on the civil defense door or flood prevention door. This coaxial nested design tightly couples the hydraulic and jacking actions, has excellent mechanical properties and transmission efficiency, and is particularly suitable for scenarios such as subway tunnels where space is limited but high-intensity output is required.

[0036] The inner flow channel 12 and outer flow channel 13 serve as key channels in the hydraulic system, respectively responsible for the transmission and circulation of hydraulic oil. The inner flow channel 12 is located below the lifting chamber 141 and the drive sleeve 15 at both ends, primarily for directing the hydraulic pressure transmitted by the drive sleeve 15 into the lifting chamber 141, allowing the lifting block 34 to rise smoothly after receiving the hydraulic driving force, thereby achieving the lifting operation of the civil air defense door or flood prevention door. The outer flow channel 13 is located below the hydraulic chamber 142 and the drive sleeve 15 at both ends, responsible for directing excess or refluxed hydraulic oil in the hydraulic chamber 142 back to the drive assembly 2 area, forming a closed oil circulation system. This dual-channel arrangement not only effectively achieves the directional delivery and recovery of hydraulic oil, improving the stability and efficiency of system operation, but also facilitates the subsequent regulation and maintenance of hydraulic pressure, further enhancing the reliability and response speed of the emergency lifting device in emergency environments in subway tunnels.

[0037] like Figure 4 As shown, the drive assembly 2 has a compact structure and mainly includes multiple components such as a drive piston 21, a sealing ring 22, a drive rod 23, a mounting rod 24 and a gripping rod 25, forming a complete manual drive system. Among them, the drive piston 21, as the core component of power transmission, is installed inside the mounting mechanism 1 and is connected to the inner flow channel 12 and the outer flow channel 13 in the hydraulic system, and is used to promote the flow of hydraulic oil under manual operation. In order to ensure that the drive piston 21 does not leak liquid during movement, its outer surface is provided with a sealing ring 22, which effectively improves the sealing performance and hydraulic efficiency by closely fitting the inner wall. The upper end of the drive piston 21 is connected to the drive rod 23, and the drive rod 23 is further connected to the mounting rod 24, so that the entire drive path is vertically connected and the force transmission is direct. A gripping rod 25 is provided on the mounting rod 24, and the operator can directly perform up and down reciprocating motion through the gripping rod 25, thereby driving the entire drive assembly 2 to work and realize the pressurization and delivery of the hydraulic oil. This structure not only improves the convenience and control accuracy of manual operation, but also ensures the rapid response capability of the equipment in emergency situations. It is an indispensable part of the emergency opening system of subway tunnel flood prevention doors.

[0038] The number of gripping rods 25 is set to three to five, allowing for flexible configuration based on operational needs, ensuring both single-person operation and multi-person collaborative operation. Each gripping rod 25 is positioned on the side of the mounting rod 24 and arranged in a circular array along its circumference. This circular arrangement provides stable gripping points in different directions, enabling operators to smoothly grasp and apply force regardless of their position. The gripping rods 25 can be made of durable metal or high-strength composite materials, with a non-slip textured outer surface for enhanced handling and safety. In practice, operators can use the gripping rods 25 to push the drive rod 23 up and down, driving the hydraulic system via the drive piston 21. Alternatively, the gripping rods 25 can be connected to an external operating device (such as a hand crank or power unit) for faster and more effortless lifting. This structure significantly improves the operational flexibility and responsiveness of the equipment in emergency situations, ensuring that civil air defense doors or flood control doors can be opened or closed quickly, enhancing the practicality and reliability of the tunnel protection system.

[0039] like Figure 5 As shown, the jacking assembly 3 is a key structural part for realizing emergency lifting of civil defense doors or anti-flooding doors, and mainly includes components such as a jacking piston 31, a sealing ball 32, a jacking rod 33 and a jacking block 34. The jacking piston 31 is installed inside the mounting mechanism 1 and is connected to the hydraulic chamber 142. It is the core component that converts hydraulic pressure into mechanical thrust. A sealing ball 32 is provided on the side of the jacking piston 31. The sealing ball 32 can effectively block the hydraulic channel during the movement of the piston to prevent hydraulic oil leakage and ensure that the system maintains stable sealing under high pressure. A jacking rod 33 is installed at the upper end of the jacking piston 31, which is used to transmit the thrust generated by the piston upward in the vertical direction, and further drive the jacking block 34 to realize the actual jacking action. The jacking block 34 is installed on the top of the jacking rod 33, directly in contact with the lower end of the civil defense door or anti-flooding door, and is the terminal component for transmitting lifting force. The overall structural design is simple and efficient, and can quickly respond to pressure changes from the hydraulic system, enabling the smooth raising of civil air defense doors in emergency situations, greatly improving the response speed and operational reliability of the subway tunnel flood prevention system.

[0040] like Figure 6As shown, the control mechanism 4 is a key component of the emergency lifting device, responsible for controlling the flow of hydraulic oil and regulating pressure. Its structure includes multiple functional units, including an inlet 41, a transition port 42, a transition chamber 43, a mounting ring 44, an outlet 45, and a control assembly 46. The control assembly 46 is mounted above the mounting ring 44, forming a stable mounting structure that ensures it will not shift or loosen during operation. The inlet 41, located above the control assembly 46, is where the hydraulic oil enters the control mechanism 4. Liquid is injected under pressure through the inlet 41. The liquid then flows through the transition port 42 below it and further into the transition chamber 43. The transition chamber 43 acts as a buffer and flow rate regulator, helping to reduce impact forces in the hydraulic system and improve system stability. The mounting ring 44, located below the transition chamber 43, provides structural connection and sealing support. Finally, the hydraulic oil flows out from below the control assembly 46 through the outlet 45 and into the subsequent hydraulic channel or lifting chamber 141. Through the adjustment function of the control component 46, the hydraulic flow, flow rate and direction can be accurately controlled, thereby ensuring that the emergency jacking process is efficient, smooth and controllable, and significantly improving the practicality and safety of the device.

[0041] like Figure 7 As shown, the control assembly 46, a key regulating unit in the control mechanism 4, comprises a control block 461, an overflow port 462, and a support spring 463. These components work together to stabilize and protect the hydraulic system from overflow. The control block 461, located in the center of the transition chamber 43, is the core component that guides the flow of hydraulic oil and regulates pressure fluctuations. An overflow port 462 is provided on the side of the control block 461. This port is used to drain excess hydraulic oil when the internal pressure of the hydraulic system exceeds a set threshold, preventing damage or loss of control due to excessive pressure. The support spring 463 is mounted below the control block 461. Its upper and lower ends resiliently engage the bottom of the control block 461 and the top of the mounting ring 44, respectively, providing support and cushioning. When hydraulic oil enters the transition chamber 43 and the pressure rises to a certain level, the support spring 463, compressed by the force, causes the control block 461 to shift accordingly, opening the overflow port 462 for pressure relief. This design has a compact structure and quick response, which can effectively improve the safe and stable operation performance of the entire emergency jacking device. It is especially suitable for underground engineering environments with high safety requirements such as subway tunnels.

[0042] The outer diameter of control block 461 is set to be identical to the diameter of transition port 42. This design ensures a tight fit within transition port 42, preventing hydraulic oil leakage or excessive fluid resistance between the two. This dimensional matching also facilitates stable operation of control block 461 within transition chamber 43, ensuring smooth fluid flow and pressure balance in the hydraulic system, and improving the overall operating efficiency and safety of the device.

[0043] During operation of the present invention, the mounting mechanism 1 is first mounted on the ground below the flood control door. When the flood control door needs to be urgently lifted, the gripping rod 25 is manually or mechanically moved up and down to realize the up and down movement of the driving piston 21 in the driving sleeve 15, through the one-way control action of the control assembly 46;

[0044] Each time the driving piston 21 moves upward, hydraulic oil can only enter the driving sleeve 15 from the hydraulic chamber 142 through the inner flow channel 12, and each time the driving piston 21 is pressed downward, hydraulic oil can only enter the jacking chamber 141 through the outer flow channel 13. The hydraulic oil in the jacking chamber 141 increases continuously, thereby lifting the entire jacking assembly 3 and achieving the function of lifting the anti-flood door.

[0045] Under heavier anti-flood doors, multiple devices are evenly arranged and used together to speed up the lifting efficiency.

[0046] Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein. Although one or more exemplary embodiments of the present disclosure have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined in the appended claims.

Claims

1. Emergency lifting device for civil air defense door and flood prevention door in subway tunnel, characterized by: It comprises a mounting mechanism (1), a driving assembly (2), a lifting assembly (3) and a control mechanism (4); The mounting mechanism (1) is mounted below the civil air defense door and the anti-flooding door, the driving assembly (2) is mounted inside the mounting mechanism (1), the lifting assembly (3) is mounted inside the mounting mechanism (1), the lifting assembly (3) is arranged directly facing below the civil air defense door and the anti-flooding door, and the control mechanism (4) is mounted inside the mounting mechanism (1); By manually holding the driving assembly (2) to move up and down, under the control of the control mechanism (4), the hydraulic oil in the hydraulic chamber (142) in the installation mechanism (1) flows unidirectionally into the jacking chamber (141), pushing the jacking block (34) upward to achieve emergency lifting.

2. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 1 is characterized by: The mounting mechanism (1) comprises a mounting base (11), an inner flow channel (12), an outer flow channel (13), a lifting sleeve (14) and a driving sleeve (15); The mounting base (11) is installed below the ground, the inner flow channel (12) and the outer flow channel (13) are opened inside the mounting base (11), and the lifting sleeve (14) and the driving sleeve (15) are installed on the mounting base (11).

3. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 2 is characterized by: A lifting cavity (141) and a hydraulic cavity (142) are provided inside the lifting sleeve (14); the lifting cavity (141) is arranged outside the hydraulic cavity (142), and its cross-sectional shape is set to be annular.

4. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 3 is characterized by: The two ends of the inner flow channel (12) are opened below the lifting chamber (141) and the driving sleeve (15), and the two ends of the outer flow channel (13) are opened below the hydraulic chamber (142) and the driving sleeve (15).

5. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 1 is characterized by: The driving assembly (2) comprises a driving piston (21), a sealing ring (22), a driving rod (23), a mounting rod (24) and a holding rod (25); The driving piston (21) is installed inside the mounting mechanism (1), the sealing ring (22) is installed on the outer surface of the driving piston (21), the driving rod (23) is installed on the driving piston (21), the mounting rod (24) is installed on the driving rod (23), and the holding rod (25) is installed on the side of the mounting rod (24).

6. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 5 is characterized by: The gripping rods (25) are provided in 3-5 pieces and are arranged in a circular array on the side of the mounting rod (24).

7. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 1 is characterized by: The lifting assembly (3) comprises a lifting piston (31), a sealing ball (32), a lifting rod (33) and a lifting block (34); The lifting piston (31) is installed inside the installation mechanism (1), the sealing ball (32) is arranged on the side of the lifting piston (31), the lifting rod (33) is installed on the top of the lifting piston (31), and the lifting block (34) is installed on the top of the lifting rod (33).

8. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 1 is characterized by: The control mechanism (4) includes a water inlet (41), a transition port (42), a transition chamber (43), a mounting ring (44), a water outlet (45) and a control assembly (46); The water inlet (41) is opened on the upper side of the control assembly (46), the transition port (42) is opened below the water inlet (41), the transition cavity (43) is opened below the transition port (42), the mounting ring (44) is arranged below the transition cavity (43), the water outlet (45) is opened below the control assembly (46), and the control assembly (46) is mounted above the mounting ring (44).

9. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 8, characterized in that: The control assembly (46) includes a control block (461), an overflow port (462) and a support spring (463); The control block (461) is installed in the middle of the transition chamber (43), the overflow port (462) is opened on the side of the control block (461), and the upper and lower ends of the support spring (463) are respectively clamped on the bottom of the control block (461) and the top of the mounting ring (44).

10. The emergency lifting device for subway tunnel civil air defense and flood prevention doors according to claim 9, characterized in that: The outer diameter of the control block (461) is set to be the same as the diameter of the transition port (42).

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