Long-distance shield tunneling ventilation device

Abstract

The application discloses a long-distance shield tunneling ventilation device, which comprises an inlet frame, a pressurizing assembly and a cyclone assembly installed in the frame, the frame is installed in a tunnel, the outlet end of the pressurizing assembly is connected with the inlet end of the cyclone assembly, the outlet end of the cyclone assembly outputs a cyclone coaxial with a main airflow, the inlet end of the pressurizing assembly is communicated with the tunnel outside or a shield machine, and the outlet end of the cyclone assembly is communicated with the shield machine or the tunnel outside. Through the above technical scheme, the airflow is pressurized by the pressurizing device, and then the power of the airflow flow is improved, so that the long-distance delivery of the airflow is adapted, meanwhile, the airflow forms a cyclone by the cyclone assembly, so that the possibility of excessive loss caused by turbulence of the airflow in the pipeline is reduced, the long-distance delivery of the airflow is adapted by the cooperation of the cyclone assembly and the pressurizing assembly, compared with the combination of multiple pressurizing assemblies, the cost of the scheme is lower, the overall volume is smaller, and the scheme is more suitable for tunnel construction with limited space.

Description

Technical Field

[0001] This application relates to the field of tunnel ventilation technology, and in particular to a ventilation device for long-distance shield tunneling. Background Technology

[0002] Tunnels are engineering structures buried in the earth's strata, representing a form of human utilization of underground space. Tunnels can be categorized into traffic tunnels, hydraulic tunnels, municipal tunnels, and mining tunnels. Traffic tunnels, in particular, are dedicated to vehicular traffic and play a vital role in improving road conditions, shortening travel distances, increasing transport capacity, and reducing accidents. During the shield tunneling construction of long-distance tunnels, the air content in newly excavated tunnels is extremely low. Therefore, ventilation is necessary to ensure the basic survival needs of construction workers.

[0003] Among related technologies, one ventilation and cooling method is negative pressure ventilation, which involves installing two turbine fans at the top of the tunnel to generate both air intake and exhaust through the air chambers. This allows stale air to be expelled from the tunnel through ducts, while fresh air from outside the tunnel is injected into it from the other side. Another ventilation and cooling method is forced ventilation, which uses multiple fans and multiple ducts to force fresh air from outside the tunnel into the working face, supplying sufficient fresh air to the tunnel interior, while stale air flows out through the tunnel.

[0004] However, when the tunnel is long, the airflow is prone to turbulence in the duct, resulting in significant airflow power loss. In this case, high-power worm gear fans or blowers are required to be connected in series. That is, a pressurization point is set at intervals in the tunnel, and often multiple devices are needed at the same location to offset the excessive loss caused by long-distance transmission. This greatly increases the cost of equipment. At the same time, the large number of devices further squeezes the already narrow tunnel space, affecting other construction procedures. Summary of the Invention

[0005] The purpose of this application is to provide a ventilation device for long-distance shield tunneling to improve the problem of excessive wear and tear in long-distance tunnel ventilation systems.

[0006] Firstly, this application provides a long-distance shield tunneling ventilation device, which adopts the following technical solution:

[0007] A ventilation device for long-distance shield tunneling includes an inlet frame and a pressurizing component and a vortex component installed inside the frame. The frame is installed inside the tunnel. The outlet end of the pressurizing component is connected to the inlet end of the vortex component. The outlet end of the vortex component outputs a vortex that is coaxial with the main airflow direction. The inlet end of the pressurizing component is connected to the outside of the tunnel or the inside of the shield machine. The outlet end of the vortex component is connected to the inside of the shield machine or the outside of the tunnel.

[0008] By adopting the above technical solution, the airflow is pressurized by the pressurization device, thereby increasing the power of the airflow to adapt to long-distance air transport. At the same time, the vortex component is used to make the airflow vortex, so as to reduce the possibility of excessive loss caused by turbulence in the airflow in the pipeline. The combination of the vortex component and the pressurization component is suitable for long-distance air transport. Compared with the combination of multiple pressurization components, this solution has lower cost and smaller overall size, and is more suitable for tunnel construction with limited space.

[0009] Optionally, the swirl assembly includes a duct and an air ring. The duct is provided with a connecting inlet pipe, which is connected to the outlet end of the pressurization assembly. A swirl tube is provided at the end of the duct away from the connecting inlet pipe. The swirl tube is flexibly connected to the duct. Multiple swirl tubes are arranged in a circumferential array along the duct. One end of the air ring is fitted onto the duct, and the other end covers the swirl tubes. An adjusting component is connected to the air ring and is connected to the swirl tubes to adjust the angle of the swirl tubes. The tilt direction and tilt angle of each swirl tube are the same.

[0010] Through the above technical solution, the airflow output by the pressurization component enters the air duct, and then the airflow is output to the air ring through the swirl tube. Several swirl tubes are all inclined and in the same direction, which makes it easy for the airflow output by the swirl tube to form a swirling flow. By actively controlling the movement pattern of the airflow, the development of turbulent vortex is suppressed, the frictional resistance of the tube wall is reduced, and the power loss of the airflow during the transportation process is reduced.

[0011] Optionally, the adjusting component includes an adjusting ring and several adjusting rods. The adjusting ring is fixedly connected to the inner wall of the air ring. The number of adjusting rods is equal to the number of cyclone tubes and corresponds one-to-one. One end of each adjusting rod is hinged to the corresponding cyclone tube, and the other end is hinged to the adjusting ring. The air ring is rotatably connected to the air duct, and the air ring can rotate around the axis of the air duct. The air ring is provided with a locking component for fixing the air duct and the air ring relative to each other.

[0012] Through the above technical solution, by setting up the adjusting rod and adjusting ring, when the air ring is rotated, the air ring drives the adjusting ring to rotate, which in turn drives all the cyclone tubes to swing together through the adjusting rod, thereby synchronously adjusting the angle of all the cyclone tubes to adapt to different occasions.

[0013] Optionally, the locking component includes a locking bolt, which is threadedly connected to the air ring, and the head of the locking bolt can abut against the side wall of the air duct.

[0014] The above technical solution uses locking bolts to achieve relative fixation between the air duct and the air ring, thereby improving the stability of the cyclone tube during operation.

[0015] Optionally, the air ring adopts a Venturi tube structure.

[0016] The above technical solution accelerates the airflow in the wind ring through the Venturi tube structure. At the same time, it can be used in conjunction with the swirl tube to reconstruct the velocity distribution inside the tube, enhance the interphase interaction, optimize energy transfer, achieve synergistic effect, further improve the power of airflow transport and reduce power loss.

[0017] Optionally, the air ring is provided with spiral blades, and multiple spiral blades are provided along the circumference of the air ring. A spiral channel is formed between adjacent spiral blades, and the offset direction of the spiral blades is the same as the tilt direction of the cyclone tube.

[0018] By adopting the above technical solution, a spiral channel is formed by the spiral blades, which facilitates the guidance of the swirling flow output from the swirling tube, further ensuring the stability of the swirling flow and reducing the possibility of airflow turbulence.

[0019] Optionally, the outlet end of the booster assembly is connected to a connecting outlet pipe, which is snap-fitted to the connecting inlet pipe.

[0020] By adopting the above technical solution, the outlet pipe and the inlet pipe are connected by a snap-fit, which facilitates the rapid connection of the pipeline.

[0021] Optionally, the end of the connecting outlet pipe away from the pressurization component is inserted into the connecting inlet pipe. A locking block is fixedly connected to the end of the connecting outlet pipe inserted into the connecting inlet pipe. A first locking groove is provided on the inner wall of the connecting inlet pipe for the locking block to be engaged. An annular groove is provided on the inner wall of the connecting inlet pipe along its own circumference. The annular groove communicates with the first locking groove. A second locking groove is connected to the end of the annular groove away from the first locking groove. The end of the first locking groove away from the air duct passes through the connecting inlet pipe.

[0022] When the connecting outlet tube is inserted into the connecting inlet tube, the locking block is first inserted into the first locking slot, and then the connecting inlet tube is rotated so that the locking block enters the annular groove until the locking block is located at the junction of the annular groove and the second locking slot. At this time, the connecting outlet tube moves away from the connecting inlet tube so that the locking block is locked into the second locking slot.

[0023] With the above technical solution, during installation, the connecting outlet pipe is inserted into the connecting inlet pipe. At this time, the locking block is first inserted into the first locking slot, and then the connecting inlet pipe is rotated so that the locking block enters the annular groove until the locking block is located at the junction of the annular groove and the second locking slot. At this time, the connecting outlet pipe moves away from the connecting inlet pipe so that the locking block is locked into the second locking slot, thereby realizing the locking connection between the connecting inlet pipe and the connecting outlet pipe.

[0024] Optionally, a sealing ring is installed inside the inlet pipe, and the sealing ring abuts against the end of the outlet pipe.

[0025] By adopting the above technical solution, the sealing performance between the inlet and outlet pipes is improved by using a sealing ring. At the same time, the elasticity generated by the compression of the sealing ring ensures that the locking block is located in the second slot under normal conditions, thus ensuring the stability of the connection between the inlet and outlet pipes.

[0026] Optionally, lifting rings are fixedly connected to both the side walls and the top wall of the frame.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By pressurizing the airflow through several sets of pressurizing devices, the power of the airflow is increased to adapt to the long-distance transport of the airflow. At the same time, the vortex component is used to make the airflow vortex to reduce the possibility of excessive loss caused by turbulence in the airflow in the pipeline. The combination of vortex component and pressurizing component is suitable for long-distance airflow transport. Compared with the combination of multiple pressurizing components, this solution has lower cost and smaller overall size, and is more suitable for tunnel construction with limited space.

[0029] 2. The airflow output from the pressurization component enters the air duct, and then the airflow is output to the air ring through the swirl tubes. Several swirl tubes are all inclined and in the same direction, which makes it easy for the airflow output from the swirl tubes to form a swirling flow. By actively controlling the movement pattern of the airflow, the development of turbulent vortex is suppressed, the frictional resistance of the tube wall is reduced, and the power loss of the airflow during the transportation process is reduced.

[0030] 3. The Venturi tube structure accelerates the airflow in the wind ring, and can be used in conjunction with the swirl tube to reconstruct the velocity distribution inside the tube, enhance the interphase interaction, optimize energy transfer, achieve synergistic effect, further improve the power of airflow transport and reduce power loss;

[0031] 4. The spiral channels formed by the spiral blades facilitate the guidance of the swirling flow output from the cyclone tube, further ensuring the stability of the swirling flow and reducing the possibility of airflow turbulence;

[0032] 5. During installation, insert the connecting outlet pipe into the connecting inlet pipe. At this time, the locking block is first inserted into the first locking slot. Then, rotate the connecting inlet pipe so that the locking block enters the annular groove until the locking block is located at the junction of the annular groove and the second locking slot. At this time, the connecting outlet pipe moves away from the connecting inlet pipe so that the locking block is locked into the second locking slot, thereby realizing the locking connection between the connecting inlet pipe and the connecting outlet pipe.

[0033] 6. The sealing ring improves the sealing performance between the inlet and outlet pipes. At the same time, the elasticity generated by the compression of the sealing ring ensures that the locking block is located in the second slot under normal conditions, thus ensuring the stability of the connection between the inlet and outlet pipes.

[0034] 7. The air duct and the air ring are fixed relative to each other by locking bolts, thereby improving the stability of the cyclone tube during operation. Attached Figure Description

[0035] Figure 1 This is a three-dimensional schematic diagram illustrating the ventilation device in this invention.

[0036] Figure 2 This is a schematic diagram illustrating the structure of the air ring and air duct in this invention.

[0037] Figure 3 This is a schematic diagram illustrating the connection between the inlet pipe and the outlet pipe in this invention.

[0038] Figure 4 yes Figure 3 A magnified view of part A in the middle.

[0039] In the diagram, 1 is the frame; 11 is the lifting ring; 2 is the pressurization assembly; 21 is the connecting outlet pipe; 211 is the locking block; 3 is the swirl assembly; 31 is the air duct; 311 is the swirl tube; 312 is the connecting inlet pipe; 313 is the first slot; 314 is the ring groove; 315 is the second slot; 316 is the sealing ring; 33 is the air ring; 331 is the adjusting ring; 332 is the adjusting rod; 333 is the locking bolt; and 334 is the spiral blade. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Example 1

[0043] Firstly, this application discloses a ventilation device for long-distance shield tunneling.

[0044] A ventilation device for long-distance shield tunneling, referring to Figures 1 to 4 It includes an air inlet pipe, an air outlet pipe, and a pressurization device. The air inlet pipe connects to the inside of the tunnel boring machine or the outside of the tunnel, and the air outlet pipe connects to the outside of the tunnel or the inside of the tunnel boring machine. Several sets of pressurization devices are connected between the air inlet pipe and the air outlet pipe.

[0045] Specifically, the pressurization device includes a frame 1 and a pressurization component 2 and a vortex component 3 installed in the frame 1. The frame 1 is installed inside the tunnel. The outlet end of the pressurization component 2 is connected to the inlet end of the vortex component 3. The outlet end of the vortex component 3 outputs a vortex that is coaxial with the direction of the main airflow.

[0046] During operation, the airflow is pressurized by several sets of pressurizing devices, thereby increasing the power of the airflow to adapt to long-distance air transport. At the same time, the vortex component 3 is used to make the airflow vortex, so as to reduce the possibility of excessive loss caused by turbulence in the pipeline. The combination of the vortex component 3 and the pressurizing component 2 is used to adapt to long-distance air transport. Compared with the combination of multiple pressurizing components 2, this solution has lower cost and smaller overall size, making it more suitable for tunnel construction with limited space.

[0047] More specifically, the swirl assembly 3 includes a duct 31 and an air ring 33. The duct 31 is provided with a connecting inlet pipe 312, which is connected to the outlet end of the pressurization assembly 2. The end of the duct 31 away from the connecting inlet pipe 312 is provided with a swirl tube 311, which is flexibly connected to the duct 31. Multiple swirl tubes 311 are arranged in a circumferential array along the duct 31. One end of the air ring 33 is fitted onto the duct 31, and the other end covers the swirl tubes 311. The air ring 33 is connected to an adjusting component, which is connected to the swirl tubes 311 to adjust the angle of the swirl tubes 311. The tilt direction and tilt angle of each swirl tube 311 are the same. The airflow output from the booster assembly 2 enters the air duct 31, and then is output to the air ring 33 through the swirl tube 311. Several swirl tubes 311 are all inclined and in the same direction, which makes it easy for the airflow output from the swirl tubes 311 to form a swirling flow. By actively controlling the movement pattern of the airflow, the development of turbulent vortex is suppressed, the frictional resistance of the tube wall is reduced, and the power loss of the airflow during the transportation process is reduced.

[0048] In addition, the adjusting components include an adjusting ring 331 and several adjusting rods 332. The adjusting ring 331 is fixedly connected to the inner wall of the air ring 33. The number of adjusting rods 332 is equal to the number of cyclone tubes 311 and corresponds one-to-one. One end of each adjusting rod 332 is hinged to the corresponding cyclone tube 311, and the other end is hinged to the adjusting ring 331. The air ring 33 is rotatably connected to the air duct 31, and the air ring 33 can rotate around the axis of the air duct 31. The air ring 33 is provided with a locking element for fixing the air duct 31 and the air ring 33 relative to each other. Through the setting of the adjusting rods 332 and the adjusting ring 331, when the air ring 33 is rotated, the air ring 33 drives the adjusting ring 331 to rotate, which in turn drives all the cyclone tubes 311 to swing together through the adjusting rods 332, thereby synchronously adjusting the angle of all the cyclone tubes 311 to adapt to different occasions.

[0049] Specifically, the locking component includes a locking bolt 333, which is threadedly connected to the air ring 33, and the head of the locking bolt 333 can abut against the side wall of the air duct 31. The locking bolt 333 achieves relative fixation between the air duct 31 and the air ring 33, thereby improving the stability of the cyclone tube 311 during operation.

[0050] It should be noted that the air ring 33 can adopt a Venturi tube structure. The Venturi tube structure can accelerate the airflow of the air ring 33, and at the same time, it can cooperate with the swirl tube 311 to reconstruct the velocity distribution inside the tube, enhance the interphase interaction, optimize energy transfer, achieve synergistic effect, further improve the power of airflow delivery and reduce power loss.

[0051] Furthermore, the air ring 33 is equipped with spiral blades 334, multiple of which are arranged circumferentially along the air ring 33. Adjacent spiral blades 334 form spiral channels, and the offset direction of the spiral blades 334 is the same as the tilt direction of the vortex tube 311. The spiral channels formed by the spiral blades 334 facilitate the guidance of the vortex output from the vortex tube 311, further ensuring the stability of the vortex and reducing the possibility of airflow turbulence. Simultaneously, in conjunction with the air ring 33, which employs a Venturi tube structure, it further achieves synergistic effects. Spiral blades 334 can also be installed in the pipelines between different pressurization devices to further ensure the stability of the vortex.

[0052] The outlet end of the booster assembly 2 is connected to a connecting pipe 21, which is snap-fitted into the connecting inlet pipe 312. The snap-fit ​​connection between the connecting pipe 21 and the connecting inlet pipe 312 facilitates quick connection of the pipeline.

[0053] Specifically, the end of the connecting outlet pipe 21 away from the pressurizing component 2 is inserted into the connecting inlet pipe 312. The end of the connecting outlet pipe 21 inserted into the connecting inlet pipe 312 is fixedly connected to a locking block 211. The inner wall of the connecting inlet pipe 312 is provided with a first locking groove 313 for the locking block 211 to be inserted into. The inner wall of the connecting inlet pipe is provided with an annular groove 314 along its own circumference. The annular groove 314 communicates with the first locking groove 313. The end of the annular groove 314 away from the first locking groove 313 is connected to a second locking groove 315. The end of the first locking groove 313 away from the air duct 31 is set through the connecting inlet pipe 312, while the end of the second locking groove 315 away from the air duct 31 does not pass through the connecting inlet pipe 312. During installation, the connecting outlet pipe 21 is inserted into the connecting inlet pipe 312. At this time, the locking block 211 is first inserted into the first locking groove 313. Then, the connecting inlet pipe 312 is rotated so that the locking block 211 enters the annular groove 314 until the locking block 211 is located at the junction of the annular groove 314 and the second locking groove 315. At this time, the connecting outlet pipe 21 moves away from the connecting inlet pipe 312 so that the locking block 211 is locked into the second locking groove 315, thereby realizing the locking connection between the connecting inlet pipe 312 and the connecting outlet pipe 21.

[0054] It should be noted that a sealing ring 316 is installed inside the inlet pipe 312, and the sealing ring 316 abuts against the end of the outlet pipe 21. The sealing ring 316 improves the sealing between the inlet pipe 312 and the outlet pipe 21. At the same time, the elasticity generated by the compression of the sealing ring 316 ensures that the locking block 211 is located in the second locking groove 315 under normal conditions, ensuring the stability of the connection between the inlet pipe 312 and the outlet pipe 21. The sealing ring 316 can be made of rubber.

[0055] In addition, lifting rings 11 are fixedly connected to the top and side walls of frame 1 to connect frame 1 to the side or top wall of the tunnel. Frame 1 can also be mounted on a bracket at the bottom of the tunnel, depending on the tunnel conditions. The pressurization component 2 can be a vortex fan or a blower, as long as it can increase airflow power. This solution can be used in both forced ventilation systems and negative pressure ventilation systems.

[0056] Working principle: The airflow is pressurized by several sets of pressurizing devices, thereby increasing the power of the airflow to adapt to long-distance air transport. At the same time, the vortex component 3 is used to make the airflow vortex, so as to reduce the possibility of excessive loss caused by turbulence in the pipeline. The combination of the vortex component 3 and the pressurizing component 2 is suitable for long-distance air transport. Compared with the combination of multiple pressurizing components 2, this solution has lower cost and smaller overall size, making it more suitable for tunnel construction with limited space.

[0057] The airflow output from the booster assembly 2 enters the air duct 31, and then is output to the air ring 33 through the swirl tube 311. Several swirl tubes 311 are all inclined and in the same direction, which makes it easy for the airflow output from the swirl tubes 311 to form a swirling flow. By actively controlling the movement pattern of the airflow, the development of turbulent vortex is suppressed, the frictional resistance of the tube wall is reduced, and the power loss of the airflow during the transportation process is reduced.

[0058] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ventilation device for long-distance shield tunneling, characterized in that, The system includes a frame (1) and a pressurizing component (2) and a vortex component (3) installed inside the frame (1). The frame (1) is installed inside the tunnel. The outlet end of the pressurizing component (2) is connected to the inlet end of the vortex component (3). The outlet end of the vortex component (3) outputs a vortex that is coaxial with the direction of the main airflow. The inlet end of the pressurizing component (2) is connected to the outside of the tunnel or inside the tunnel boring machine. The outlet end of the vortex component (3) is connected to the inside of the tunnel boring machine or outside the tunnel.

2. The ventilation device for long-distance shield tunneling according to claim 1, characterized in that: The swirl assembly (3) includes a duct (31) and an air ring (33). The duct (31) is provided with a connecting inlet pipe (312), which is connected to the outlet end of the pressurization assembly (2). A swirl tube (311) is provided at the end of the duct (31) away from the connecting inlet pipe (312). The swirl tube (311) is softly connected to the duct (31). Multiple swirl tubes (311) are arranged in a circumferential array along the duct (31). One end of the air ring (33) is fitted onto the duct (31), and the other end covers the swirl tubes (311). An adjusting component is connected to the air ring (33), which is connected to the swirl tubes (311) to adjust the angle of the swirl tubes (311). The tilt direction and tilt angle of each swirl tube (311) are the same.

3. A ventilation device for long-distance shield tunneling according to claim 2, characterized in that: The adjusting component includes an adjusting ring (331) and several adjusting rods (332). The adjusting ring (331) is fixedly connected to the inner wall of the air ring (33). The number of adjusting rods (332) is equal to the number of cyclone tubes (311) and corresponds one-to-one. One end of each adjusting rod (332) is hinged to the corresponding cyclone tube (311), and the other end is hinged to the adjusting ring (331). The air ring (33) is rotatably connected to the air duct (31), and the air ring (33) can rotate around the axis of the air duct (31). The air ring (33) is provided with a locking component for fixing the air duct (31) and the air ring (33) relative to each other.

4. A ventilation device for long-distance shield tunneling according to claim 3, characterized in that: The locking component includes a locking bolt (333), which is threadedly connected to the air ring (33).

5. A ventilation device for long-distance shield tunneling according to claim 4, characterized in that: The air ring (33) adopts a Venturi tube structure.

6. A ventilation device for long-distance shield tunneling according to claim 5, characterized in that: The wind ring (33) is provided with a spiral blade (334), and multiple spiral blades (334) are provided along the circumference of the wind ring (33). A spiral channel is formed between adjacent spiral blades (334), and the offset direction of the spiral blades (334) is the same as the tilt direction of the swirl tube (311).

7. A ventilation device for long-distance shield tunneling according to claim 6, characterized in that: The outlet end of the booster assembly (2) is connected to a connecting pipe (21), and the connecting pipe (21) is snapped into connection with the connecting inlet pipe (312).

8. A ventilation device for long-distance shield tunneling according to claim 7, characterized in that: The end of the connecting outlet pipe (21) away from the pressurizing component (2) is inserted into the connecting inlet pipe (312). The end of the connecting outlet pipe (21) inserted into the connecting inlet pipe (312) is fixedly connected to a locking block (211). The inner wall of the connecting inlet pipe (312) is provided with a first locking groove (313) for the locking block (211) to be locked in. The inner wall of the connecting inlet pipe is provided with an annular groove (314) along its circumference. The annular groove (314) communicates with the first locking groove (313). The end of the annular groove (314) away from the first locking groove (313) is connected to a second locking groove (315). The end of the first locking groove (313) away from the air duct (31) is set through the connecting inlet pipe (312). When the connecting outlet pipe (21) is inserted into the connecting inlet pipe (312), the locking block (211) is first inserted into the first locking slot (313), and then the connecting inlet pipe (312) is rotated so that the locking block (211) enters the annular groove (314) until the locking block (211) is located at the junction of the annular groove (314) and the second locking slot (315). At this time, the connecting outlet pipe (21) moves away from the connecting inlet pipe (312) so that the locking block (211) is locked into the second locking slot (315).

9. A ventilation device for long-distance shield tunneling according to claim 8, characterized in that: A sealing ring (316) is installed inside the connecting inlet pipe (312), and the sealing ring (316) abuts against the end of the connecting outlet pipe (21).

10. A ventilation device for long-distance shield tunneling according to claim 8, characterized in that: Lifting rings (11) are fixedly connected to the side walls and top walls of the frame (1).

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